JP2013112431A - Braking device of hoist for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a braking device of a hoist for an elevator in which a plurality of arms are provided to the outer peripheral side of a brake drum without increasing the size of the hoist.SOLUTION: This braking device of a hoist for an elevator includes the rotatable brake drum, drive sections which press or release friction members on and from the outer peripheral surface of the brake drum, the plurality of arms to which the drive sections are provided, first mounting sections to which one ends of the arms are rotatably attached and which are provided to the outer peripheral side of the brake drum, and second mounting sections to which the other ends of the arms are provided so as to be joined thereto and released therefrom and which are provided to the outer peripheral side of the brake drum. One ends of two arms are attached to at least one of the first mounting sections so as to be rotatable about a same rotating axis.

Description

The present invention relates to an elevator hoisting machine braking device, and more particularly to an elevator hoisting machine braking device provided with a plurality of friction materials on the outer peripheral side of a brake drum.

In the elevator hoisting machine braking device, a shaft is erected on the housing, and the sheave and the brake drum on which the car is suspended are provided on the shaft so as to be integrally rotatable. The housing is provided with an arm so as to face the outer peripheral surface of the brake drum. A friction material is provided at an intermediate portion of the arm, and the brake drum is braked and released by pressing or separating the friction material against the brake drum.

One end of the arm is rotatably attached to a first attachment provided in the housing, and the other end is fastened to a second attachment provided in the housing with a bolt.
At the time of maintenance, the bolt of the second mounting portion is removed and the arm is rotated to clean and replace the friction material.
(For example, see Patent Document 1)

International Publication No. 11/004543 (Figure 1)

By the way, in order to obtain a required braking capacity, for example, four arms may be provided in the housing. Each arm requires a first attachment portion and a second attachment portion. That is, a space for providing a total of eight attachment portions, two on each of the four arms, is required for the housing, which causes a problem that the hoisting machine is increased in size.

The present invention has been made to solve such a problem, and an object of the present invention is to obtain a braking device for an elevator hoisting machine in which a plurality of arms are provided on the outer peripheral side of a brake drum without increasing the size of the hoisting machine. And

A braking device for an elevator hoist according to the present invention includes a rotatable brake drum, a drive unit that presses and separates a friction material from an outer peripheral surface of the brake drum, and a plurality of rotations provided with the drive unit. The moving member and one end portion of the rotating member are rotatably attached, and the first attaching portion provided on the outer peripheral side of the brake drum and the other end portion of the rotating member are attached to be able to be fastened and released. And a second mounting portion provided on the outer peripheral side of the brake drum, and at least one first mounting portion has one end of two rotating members rotating about the same rotational axis. It is attached as possible.

According to the present invention, one end of the rotating member is rotatably attached to the first attaching portion provided on the outer peripheral side of the brake drum, and the other end of the rotating member is fastened to the second attaching portion. Installing releasably. At this time, one end of each of the two rotating members is attached to one first mounting portion so that the two rotating members can rotate about the same rotation axis, and each of the two rotating members is the other. The end portions are attached to different second attachment portions. As a result, the number of first mounting portions is half the number of rotating members, and the space required on the outer peripheral side of the brake drum to provide the first mounting portions is also halved. Therefore, a plurality of rotating members can be provided on the outer peripheral side of the brake drum without increasing the hoisting machine.

In the elevator hoisting machine braking device according to the present invention, one end portion has a hole, the first attachment portion has a screw hole, and is inserted through the holes at one end portions of the two rotating members. It is preferable that a bolt screwed into the screw hole of each of the first mounting portions is provided.

According to the present invention, the one end of each of the two rotating members is inserted into the hole of each one of the two rotating members and is screwed into the screw hole of the one first mounting portion. Is fixed to one first mounting portion. Further, the other end portions of the two rotating members are fastened to different second mounting portions. In this state, the drive unit presses the friction material against the outer peripheral surface of the brake drum or pulls it away. Further, when the bolt of the first mounting portion is slightly loosened and the fastening of the other end portion of the rotating member is released, the rotating member can rotate about the bolt of the first mounting portion.

Therefore, two rotating members can be attached to one first attaching portion with one bolt. Moreover, the operation | work which fixes two rotation members to the 1st attaching part, or makes it possible to rotate can be simplified because it should just tighten or loosen one bolt.

ADVANTAGE OF THE INVENTION According to this invention, the braking device of the elevator hoisting machine which provided the some arm in the outer peripheral side of the brake drum can be obtained, without enlarging a hoisting machine.

1 is an overall view of a braking device for an elevator hoist according to an embodiment of the present invention. It is the figure which rotated the rotation member of the braking device of the elevator hoist of FIG. It is a fragmentary sectional view which shows the arrow A of the braking device of the elevator hoist of FIG.

Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall view of a braking device for an elevator hoist according to an embodiment of the present invention, and shows a state in which a rotating member is fixed. FIG. 2 shows a state where the turning member of the braking device of the elevator hoisting machine shown in FIG. 1 is turned. FIG. 3 is a partial sectional view showing an arrow A of the braking device of the elevator hoisting machine shown in FIG.

1 to 3, a shaft 7 is provided so as to protrude from a central portion of a housing 5 that is a main body of the hoist 1. A brake drum 11 is provided on the shaft 7 so as to be rotatable integrally with a sheave (not shown) on which an elevator car (not shown) is suspended. The braking device 2 of the hoist 1 is configured symmetrically when viewed in the axial direction of the shaft 7.

Two mounting portions 5a and 5a are provided as first mounting portions so as to protrude to the left and right of the outer peripheral portion of the housing 5 when viewed from the brake drum 11 side, and the second mounting portions 5a and 5a are provided below each of the second mounting portions 5a and 5a. Two attachment portions 5b and 5b are provided as attachment portions. Furthermore, two mounting portions 5c and 5c are provided as second mounting portions so as to protrude to the upper part of the outer peripheral portion of the housing 5.

As described above, the outer peripheral portion of the housing 5 viewed from the brake drum 11 side is provided with the mounting portion 5c, the mounting portion 5a, and the mounting portion 5b symmetrically from above. An arm 13 as a rod-shaped rotating member having a quadrangular cross section across the attachment portion 5c and the attachment portion 5a is attached so as to face the outer peripheral surface 11a of the brake drum 11, and the attachment portion 5a and the attachment portion An arm 16 serving as a rod-shaped rotating member having a quadrangular cross section over 5b is attached to face the outer peripheral surface 11a.

The thickness of the one end portion 13a of the arm 13 in the axial direction of the shaft 7 is formed to be one step thinner than the thickness of the other portions. One end portion 16a of the arm 16 is also formed so that the thickness in the axial direction of the shaft 7 is one step thinner than the thickness of other portions. And the one end part 13a and the one end part 16a which are thinly stepped are piled up so that it may combine alternately, and are attached to the attachment part 5a.

A screw hole 5 d is provided in parallel to the shaft 7 in the attachment portion 5 a to which the arm 13 and the arm 16 are attached. And the one bolt 20 inserted in the hole 13c provided in each of the one end part 13a and the one end part 16a and the hole 16c is fastened in the screw hole 5d. As described above, the two arms 13 and 16 are attached to one attachment portion 5 a by one bolt 20. Further, the other end portion 13 b of the arm 13 is attached to the attachment portion 5 c by a bolt 22, and the other end portion 16 b of the arm 16 is attached to the attachment portion 5 b by a bolt 23.

A driving portion 14 is provided at the intermediate portion of the arm 13 so as to face the outer peripheral surface 11a, and the friction material 15 provided on the driving portion 14 is pressed against the outer peripheral surface 11a by the driving portion 14 or separated. Or Similarly, a driving portion 17 is provided at the intermediate portion of the arm 16 so as to face the outer peripheral surface 11a, and the friction material 18 provided on the driving portion 17 is pressed against the outer peripheral surface 11a by the driving portion 17. Or pulled apart. The brake drum 11 is braked or released by the friction material 15 and the friction material 18 being pressed against or pulled apart from the outer peripheral surface 11a.

For example, during maintenance of the braking device 2, the bolt 22 and the bolt 23 are removed, the bolt 20 is loosened slightly, and the arm 13 and the arm 16 are rotated around the axis of the bolt 20 as a rotation axis in a direction away from the brake drum 11. When moved, maintenance of the drive units 14 and 17 and the friction materials 15 and 18 can be performed. After the maintenance is completed, the arm 13 and the arm 16 are rotated toward the brake drum 11, the other end portion 13b is attached to the attachment portion 5c with the bolt 22, and the other end portion 16b is attached to the attachment portion 5b with the bolt 23. The bolt 20 is tightened to fix the one end portion 13a and the one end portion 16a to the mounting portion 5a. Thereby, the braking device 2 becomes operable.

According to the braking device 2 of the elevator hoist 1 configured as described above, the arm 13 and the arm 16 are formed to be thinner in a stepped manner in the axial direction of the shaft 7 than the other portions. The respective one end portions 13a and the one end portions 16a are overlapped so as to be alternately combined, and then attached to one attachment portion 5a by one bolt 20. The other end portion 13 b of the arm 13 is attached to the attachment portion 5 c with a bolt 22, and the other end portion 16 b of the arm 16 is attached to the attachment portion 5 b with a bolt 23.

For this reason, when the arm 13 and the arm 16 are provided on the outer peripheral side of the brake drum 11, only one mounting portion 5 a is provided for the two arms 13 and 16, and the mounting portion is provided on the outer peripheral portion of the housing 5. Only one space is required to provide 5a. Therefore, even when there is no space for providing a dedicated mounting portion for attaching the one end portion 13a and the one end portion 16a of the arm 13 and the arm 16 to the outer peripheral portion of the housing 5, the housing 5, that is, the hoisting machine 1 is enlarged and the mounting portion. The arm 13 and the arm 16 can be provided on the outer peripheral side of the brake drum 11 without securing a space for providing the brake drum 11.

Further, the two arms 13 and 16 can be attached to one attachment portion 5a with one bolt 20. Further, the operation of fixing the two arms 13 and 16 to the mounting portion 5a or making them rotatable is simple because only one bolt 20 is tightened or loosened.

In the present embodiment, the braking device 2 of the hoisting machine 1 is configured to be bilaterally symmetric when viewed in the axial direction of the shaft 7, and the four arms are provided bilaterally symmetrically. Even if the arm is provided asymmetrically, the same effect can be obtained. Further, even when the number of arms is an odd number, the same effects as those of the present embodiment can be obtained with respect to the mounting portions of the remaining even number of arms excluding one arm.

1 hoisting machine, 2 braking device, 5a, 5b, 5c mounting part, 5d screw hole,
11 brake drum, 11a outer peripheral surface, 13, 16 arms,
13a, 16a one end, 13b, 16b the other end, 13c, 16c hole,
14, 17 drive unit, 15, 18 friction material, 20, 22, 23 bolts

Claims (2)

A rotatable brake drum,
A drive unit that presses or separates the friction material against the outer peripheral surface of the brake drum; and
A plurality of rotating members provided with the drive unit;
One end portion of the rotating member is rotatably attached, and a first attaching portion provided on the outer peripheral side of the brake drum;
The other end portion of the rotating member is fastened and releasably attached, and a second attachment portion provided on the outer peripheral side of the brake drum,
A braking device for an elevator hoisting machine, wherein at least one of the first attachment portions has one end portions of the two rotation members attached to be rotatable about the same rotation axis. . The one end has a hole;
The first mounting portion has a screw hole;
2. The elevator according to claim 1, further comprising: a bolt that is inserted into the hole at the one end of the two rotating members and screwed into the screw hole of the first mounting portion. A hoisting machine braking device.

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