JPH10331885A - Manual release device for electromagnetic brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smooth and simplify the work of mounting to and demounting from an electromagnetic brake without impairing its arms. SOLUTION: This device is formed out of a first lever 17 to be engaged with one arm of an electromagnetic brake, a second lever 18 to be engaged with the other arm of the electromagnetic brake, a connection body 19 connecting the first and second levers 17 and 18 in such a way that they can be rotated, a pole 20 extended upward from the connection body 19, and of a handle 21 provided for the upper end part of the pole 20. A stopper mounting member 22 is provided, which is extended in the right and left out of the connection body 19, stopper mounting member 22 is provided with a first stopper 23 and a second stopper 24, where the former abuts against the first lever 17, and the latter abuts against the second lever 18 when a leg opening angle made by the first lever 17 and the second lever 18, is set at an angle larger than 180 deg., and concurrently, a first abutting member 26 capable of being rotated, and a second abutting member 27 capable of being rotated, are provided for the first lever 17 and the second lever 18 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic brake manual release device suitable for manually releasing an electromagnetic brake used for a passenger conveyor drive motor or the like.

[0002]

2. Description of the Related Art As a manual release device for an electromagnetic brake of this type, a first lever engaged with one arm of the electromagnetic brake, a second lever engaged with the other arm of the electromagnetic brake, A connecting body for rotatably connecting the lever and the second lever, and pressing the connecting body downward,
It has been known that both arms of an electromagnetic brake are opened in a direction away from each other by opening a first lever and a second lever to release the electromagnetic brake.

[0003]

In the above prior art, when the connecting member is pushed to open the first lever and the second lever, engagement of both arms of the electromagnetic brake with the first lever and the second lever. Is in a point contact state, and both arms are rubbed by the first lever and the second lever, so that both arms are damaged. Further, when a manual release device is mounted on the electromagnetic brake, the connected body of the manual release device is pushed or pulled in order to be in a state of being brought close to the electromagnetic release device including the brake core and the brake coil. However, there is a problem that the operation of attaching and detaching the manual release device to and from the electromagnetic brake cannot be performed smoothly.

[0004] It is an object of the present invention to provide a manual release device for an electromagnetic brake which can solve the above problems.

[0005]

An object of the present invention is to provide a first lever which is engaged with one arm of an electromagnetic brake, a second lever which is engaged with the other arm of the electromagnetic brake, and
A connecting body that rotatably connects the lever and the second lever;
It consists of a column extending upward from this connector, and a handle provided at the upper end of the column. By pushing the handle downward to open the first lever and the second lever, the two arms and the electromagnetic brake are opened. In an electromagnetic brake manual release device that opens in a direction away from each other against a braking spring and opens an electromagnetic brake, a stopper mounting member extending left and right from the coupling body is provided, and the stopper mounting member includes a first mounting member. The opening angle θ of the lever and the second lever is 180
When set to a degree or higher, a first stopper that contacts the first lever and a second stopper that contacts the second lever are provided, and a rotatable first contact member is provided on the first lever,
By providing a rotatable second contact member on each of the second levers, the first lever is connected to one arm via the first contact member, and the second lever is connected to the other arm via the second contact member. This is achieved by engaging the respective arms.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1 and FIG. 2, an electromagnetic brake 2 of a passenger conveyor driving device 1 is disposed on both sides of a brake drum 3 and has a pair of arms 6 and 7 rotatable around branches 4 and 5, respectively. Brake shoes 8, 9 attached to arms 6, 7 opposite to the brake drum
And bolts 10, 11 provided on the free end sides 6a, 7a of the arms 6, 7 through the free end sides 6a, 7a.
And a nut 12 screwed to both ends of the bolts 10 and 11
And the arms 6 attached to the bolts 10 and 11, respectively.
Braking springs 13, 1 for applying forces in a direction approaching each other
And an electromagnetic opening device 15 disposed between the free ends 6a and 7a of the arms 6 and 7 to separate the arms 6 and 7 from each other against the braking springs 13 and 14. In FIG. 2, reference numeral 15 denotes a drum cover made of a steel plate.

The manual release device 16 for manually releasing the electromagnetic brake 2 is mounted between the free ends 6a, 7a of the arms 6, 7, as shown in FIGS. As shown in FIGS. 3 to 5, the manual opening device 16 includes a first steel plate.
Lever 17, second lever 18 made of steel plate, connecting body 19 made of steel plate, column 20 made of steel pipe having an outer diameter of 17 mm, outer diameter 42
mm, a handle 21 made of steel pipe, a stopper mounting member 22 made of a steel plate, a first stopper 23 formed of a screw abutting on the first lever 17, a second stopper formed of a screw abutting on the second lever 18, and the like. 24, a fixing screw 25, a first contact member 26 made of a steel plate, and a second contact member 27 made of a steel plate.

The first lever 17 is provided at one end with a mounting hole 17a for mounting to the connecting body 19, and at the other end a first contact member 26 is provided rotatably about a branch 29. I have. The second lever is provided at one end with a mounting hole 18a for mounting to the connecting body 19, and at the other end with a second contact member 27. The first contact member 26 and the second contact member 27 have free ends 6a, 7 of the arms 6, 7, respectively.
L-shaped portions 26a and 27a for contacting a are formed respectively.

[0010] The connecting body 19 is formed with a screw hole 19 a for mounting the fixing screw 25. Fix the fixing screw 25
The first lever 17 and the second lever 1 are fixed by being fixed to the screw hole 19a of the connecting body 19 in a state fitted in the mounting hole 17a of the lever 17 and the mounting hole 18a of the second lever 18.
8 is rotatably supported by the connecting body 19. When the manual release device 16 is not mounted on the electromagnetic brake 2, the bottom of the connecting member 19 is attached to the connecting member 19 so that the first lever 17 and the first lever 18 maintain the state shown in FIG. 3. 19b is provided integrally.

A column 20 extending upward is integrated with the upper end of the connecting member 19 by welding. The length of the column 20 is about 150 mm. A handle 21 extending left and right is integrated with the upper end of the support 20 by welding. The total length of the handle 21 is about 220 mm. As shown in FIG. 8, the connecting body 19 has a substantially rectangular cross-sectional end line. A stopper 22 is integrated with the upper end of the connecting body 19 by welding so as to extend right and left.

The stopper mounting member 22 has a first end on one end.
The stopper 23 and the second stopper 24 are integrally fixed to the other end, respectively. Manual release device 16
As shown in FIGS. 1 and 2, when the electromagnetic brake 2 is mounted, as shown in FIG. 4, the leg opening angle θ of the first lever and the second lever becomes 180 ° or more. The first stopper 23 contacts the second lever 18 with the first stopper 23. In this configuration, the free ends 6a, 7a of the arms 6, 7 open in a direction to separate from each other against the spring force of the braking springs 13, 14, and the brake shoes 8, 9 are separated from the brake drum 3, so that the electromagnetic force is reduced. The brake 2 is released.

Even if the first lever 17 and the second lever 18 move downward by pushing down the handle 21, the first lever 17 rotates with respect to the first contact member 26, and
Since the lever 18 rotates with respect to the second contact member 27, the first contact member 26 and the second contact member 27 do not rub the free end sides 6a, 7a of the arms 6, 7 without rubbing. As shown in FIGS. 6 and 7, a first contact member 26 and a second contact member 27 are locked to the arms 6 and 7.

The first lever 17 and the second lever 18 have the same shape. The first contact member 26 and the second contact member 27 have the same shape.

According to the above configuration, the following operation and effect can be obtained.

(1) If the handle 21 is grasped and pushed downward, the weight of the worker can be added to the handle 21 without difficulty, so that the operation of attaching the manual release device 16 to the electromagnetic brake 2 can be performed smoothly.

The manual release device 16 is connected to the electromagnetic brake 2
In order to remove it, it is sufficient to pull the handle 21 in the vertical direction, and the removal operation can be performed without difficulty.

(2) Even if the first lever 17 and the second lever 18 are moved up and down by pushing or pulling the handle 21, the first contact member 26 and the second contact member 27
As shown in FIG. 6 and FIG.
a, 7a, the arm 6,
7 is not damaged.

(3) Since the handle 21 is disposed at a position largely separated from the connecting body 19 by the support column 20,
The connector 21 can be pushed or pulled by the handle 21 without being disturbed by various devices of the electromagnetic brake 2, and the workability of the mounting work and the removing work is extremely good.

[0020]

As described above, according to the present invention, there is provided an electromagnetic brake manual release device capable of smoothly performing the work of mounting and dismounting the electromagnetic brake without damaging the arm. .

[Brief description of the drawings]

FIG. 1 is a top view of an embodiment of the present invention in which a manual release device is mounted on an electromagnetic brake.

FIG. 2 is a perspective view of an embodiment of the present invention in which a manual release device is mounted on an electromagnetic brake (with a drum cover).

FIG. 3 is a front view of a manual opening device according to an embodiment of the present invention.

FIG. 4 is a front view of the manual opening device according to the embodiment of the present invention, which is attached to an electromagnetic brake.

FIG. 5 is an exploded perspective view of a manual opening device according to an embodiment of the present invention.

FIG. 6 is an enlarged view of a main part before the electromagnetic brake is released according to the embodiment of the present invention.

FIG. 7 is an enlarged view of a main part when the electromagnetic brake is released according to an embodiment of the present invention.

FIG. 8 is a sectional view taken along line AA of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Passenger conveyor drive device 2 Electromagnetic brake 3 Brake drum 6 Electromagnetic brake arm 7 Electromagnetic brake arm 13 Brake spring 14 Brake spring 15 Drum cover 16 Manual release device 17 1st lever 18 2nd lever 19 Connecting body 20 Post 21 Handle 22 Stopper mounting member 23 First stopper 24 Second stopper 25 Fixing screw 26 First contact member 27 Second contact member

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Minoru Suma 5-7 Hatchobori, Naka-ku, Hiroshima City, Hiroshima Prefecture Hitachi Building Systems China Branch Office (72) Inventor Kazunori Chihara 5 Hatchobori, Naka-ku, Hiroshima City, Hiroshima Prefecture No. 7 Hitachi Building Systems China Branch Office

Claims (3)

[Claims] 1. A first lever engaged with one arm of an electromagnetic brake, a second lever engaged with the other arm of the electromagnetic brake, and the first lever and the second lever are rotatably connected. A connecting member, a column extending upward from the connecting member, and a handle provided at an upper end of the column; pushing the handle downward to open the first lever and the second lever to open the two arms; And a manual release device for the electromagnetic brake that opens in a direction away from each other against the braking spring of the electromagnetic brake and opens the electromagnetic brake, wherein a stopper mounting member extending left and right from the coupling body is provided.
The stopper mounting member is provided with a first stopper that contacts the first lever and a second stopper that contacts the second lever when the opening angle θ of the first lever and the second lever is set to 180 degrees or more. By providing a rotatable first contact member on the first lever and a rotatable second contact member on the second lever, the first lever is connected to one arm via the first contact member. A manual release device for an electromagnetic brake, wherein the second lever is engaged with the other arm via a second contact member. 2. The manual release device for an electromagnetic brake according to claim 1, wherein said handle is a cylinder extending left and right from a support post. 3. The manual operation of an electromagnetic brake according to claim 1, wherein the first lever and the second lever have the same shape, and the first contact member and the second contact member have the same shape. Opening device.