JP2013144585A - Disk brake device for elevator winding machine, and powder dust removing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize a contacting state of a disk with a brake piece without lengthening contacting operation for a long time.SOLUTION: A disk brake device 1 for an elevator winding machine includes: a brake disk 3; at least one brake piece 5 that is selectively pressed on the brake disk; and a plunger 7 that supports the brake piece and makes the brake piece move to the brake disk. A gas spout outlet 15 is opened on a contact surface 13 on a side contacting the brake disk in the brake piece.

Description

  The present invention relates to a disk brake device and a dust removing method for an elevator hoisting machine.

  In a conventional disc brake device for an elevator hoist, as shown in Patent Document 1, brake pieces are arranged on both sides of a brake disc coupled to a rotating sheave, and these brake pieces are driven by a hydraulic plunger. The braking force was obtained by sandwiching the brake disc with a pair of braking pieces.

JP 2002-96985 A

  By the way, in the above-described disc brake device, it is difficult to obtain a sufficient braking force (friction force) unless the contact state between the brake disc and the braking piece is appropriate. At the site where the brakes are installed, it is necessary to perform the contact surface rubbing work before using the new brake pieces.

  However, in the conventional disc brake device, if the brake disc and the braking piece are kept slid, wear powder from the braking piece generated by friction between the brake disc and the braking piece adheres to the surface of the brake disc. There is a problem that the contact with the brake piece is not stable. On the other hand, as a countermeasure to such a problem, it is considered effective to repeat the braking and release (idling) and perform the operation of removing the abrasion powder at the idling of the brake disk. However, in this case, since a process for removing wear powder is added to the rubbing operation, a new problem that the entire time of the rubbing operation becomes enormous may occur.

  The present invention has been made in view of the above, and a disk for an elevator hoisting machine capable of stabilizing the contact state between the disk and the brake piece while avoiding a long time for the rubbing operation. It is an object to provide a brake device and a dust removal method.

In order to achieve the above-described object, a disc brake device for an elevator hoist according to the present invention supports a brake disc, at least one braking piece that is selectively pressed against the brake disc, and the braking piece. And a plunger for moving the brake piece with respect to the brake disc, and a gas jet port is opened on a contact surface of the brake piece on the side in contact with the brake disc.
Furthermore, the present invention for achieving the same object also provides a dust removing method in a disc brake device for an elevator hoisting machine, the method including at least a brake disc and at least a pressing against the brake disc. There is provided a disc brake device for an elevator hoisting machine comprising one brake piece and a plunger that supports the brake piece and moves the brake piece with respect to the brake disc, and the brake disc in the brake piece A gas is ejected from a gas ejection port opened on the contact surface on the side in contact with the air to remove dust adhering to the braking piece.

  According to the present invention, it is possible to stabilize the contact state between the disc and the brake piece while avoiding a prolonged rubbing operation.

It is a figure which shows the principal part relevant to the dust removal of the disc brake apparatus in Embodiment 1 of this invention. It is a perspective view which shows an example of the contact surface of the side which contacts a brake disc in a braking piece in a front. It is a figure which shows especially a ventilation means regarding the disc brake apparatus in Embodiment 2. FIG. It is a figure which shows especially the state of an airflow regarding the disc brake device in Embodiment 3. FIG. It is a figure of the same aspect as FIG. 2 which shows the example which changed the contact surface of the brake piece in the front. It is a figure of the same aspect as FIG. 2 which shows another example which changed the contact surface of the brake piece in the front.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a disk brake device and a dust removing method for an elevator hoist according to the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a main part related to dust removal of the disc brake device according to the first embodiment. FIG. 2 is a perspective view showing a contact surface of the braking piece on the side in contact with the brake disc in front.

  A disc brake device 1 for an elevator hoisting machine has a known brake disc 3 and a pair of braking pieces 5 provided on both sides thereof. The pair of braking pieces 5 are selectively pressed against the brake disc 3. Each of the brake pieces 5 is supported by the corresponding plunger 7 and is moved relative to the brake disc 3 by the movement of the plunger 7.

  Connected to each of the plungers 7 is a hydraulic pressure applying means 9 for performing a releasing operation and a spring 11 for performing a braking operation. Note that the operation mechanism of the plunger 7 is not limited to this, but is merely an example.

  Each of the braking pieces 5 is disposed so as to face the brake disc 3. A gas ejection port 15 is opened on the contact surface 13 of each brake piece 5 on the side in contact with the brake disk 3. A groove 17 is formed on the contact surface 13. FIG. 2 shows an example of the groove 17. In the embodiment of FIG. 2, the groove 17 is formed as a plurality of lines extending in parallel in one direction. The gas ejection port 15 communicates with the groove 17 so that gas can be supplied to the groove 17 while being pressed against the brake disk 3.

  The groove 17 opens to the contact surface 13 and also opens to the side surface 19 around the contact surface 13 of the braking piece 5.

  Further, a concave portion 21 is formed in a portion around the gas outlet 15 on the contact surface 13 of the braking piece 5. In other words, it can be said that the plurality of stripes of the groove 17 are connected by the recess 21. Due to the recess 21, the gas ejected from the gas ejection port 15 is widely supplied to the plurality of lines of the groove 17.

  The first ventilation path 23 passes through each brake piece 5, and the second ventilation path 25 passes through each plunger 7. The first ventilation path 23 and the second ventilation path 25 are in communication with each other, and the end of the first ventilation path 23 is connected to the gas outlet 15.

  In addition, although it is an example, in this Embodiment, the gas ejection port 15, the 1st ventilation path 23, and the 2nd ventilation path 25 are each arrange | positioned at the center of the braking piece 5 and the plunger 7. FIG. Further, the brake piece 5, the plunger 7, the hydraulic pressure applying means 9, the spring 11, the gas outlet 15, the first ventilation path 23 and the second ventilation path 25 are symmetrical on both sides with respect to the thickness center plane of the brake disc 3. Is arranged.

  One end of a duct 27 is connected to the end of the second ventilation path 25 that opens in each plunger 7, and the other end of the duct 27 is connected to a blower device 29.

  In the first embodiment configured as described above, when necessary, the gas (air) generated by the blower device 29 is injected into the gas through the duct 27, the second ventilation path 25, and the first ventilation path 23. The gas is supplied to the outlet 15, ejected from the gas outlet 15, and sprayed between the brake disk 3 and the contact surface 13 of the brake piece 5. As a result, even when the brake piece continues to be rubbed against the brake disc, it is possible to obtain the action of blowing the abrasion powder of the brake piece by the gas ejected from the gas jet port, thereby avoiding a long time for the rubbing operation. In addition, it is possible to stabilize the contact between the disc and the brake piece.

  Further, a groove is formed on the contact surface of the brake piece that contacts the brake disc, and the gas ejection port communicates with the groove so that gas can be supplied to the groove while being pressed against the brake disc. Even when the brake piece continues to be rubbed against the brake disk, the gas blown from the gas outlet is supplied to the wide area of the brake piece through the groove, and the wear powder blown off is passed through the groove. Therefore, the dust removal effect can be greatly enhanced.

  Each of the braking piece and the plunger has a ventilation passage therethrough, and when the ventilation passage is connected to the gas outlet, the gas supply path is arranged by using the inside of the moving braking piece and the plunger. Even though the gas outlet is a movable object, the gas supply path can be clearly provided without interfering with the surrounding parts, and gas can be stably supplied to the movable gas outlet. Can do.

Embodiment 2. FIG.
FIG. 3 is a diagram specifically showing the air blowing means in the disk brake device according to the second embodiment. The disc brake device 101 for an elevator hoisting machine according to the second embodiment is the same as the disc brake device according to the first embodiment except for parts described below.

  The disc brake device 101 according to the second embodiment includes a rotating body 129 as a blower. The rotating body 129 is rotatably disposed beside the brake disk 3 and generates air flow before and after the rotating body 129 by rotating. The rotating body 129 includes a cylindrical portion 131 and a propeller portion 133. The propeller part 133 is disposed inside the cylindrical part 131. The outer end portion of the propeller portion 133 is fixed to the inner peripheral surface of the cylindrical portion 131, and the cylindrical portion 131 and the propeller portion 133 rotate as an integrated object.

  The outer peripheral surface of the cylindrical portion 131 of the rotating body 129 is in frictional contact with the outer peripheral surface of the brake disk 3, and the rotating body 129 is driven by the rotational force of the brake disk 3. The rotating shaft 135 of the rotating body 129 is fixed to the exterior of the disc brake device. Covers 137 are provided in front of and behind the rotating body 129, and the front and back covers 137 are connected to the corresponding ducts 27.

  In the second embodiment as described above, when the brake disk 3 rotates as the elevator car moves up and down, the rotating body 129 is also driven and rotated, and suction air is supplied to one of the front and rear of the rotating body 129, and the discharge air is supplied to the other. Wind is generated, and these airflows act on the contact surface 13 of the braking piece 5 through the cover 137, the duct 27, the first ventilation path 23, the second ventilation path 25, and the gas outlet 15. As a result, as in the case of the first embodiment, even when the brake piece continues to be rubbed against the brake disc, the action of blowing off the abrasion powder of the brake piece by the gas ejected from the gas outlet can be obtained. Stabilization of contact between the disc and the brake piece can be achieved while avoiding prolonged work.

  Furthermore, in the second embodiment, the rotating body as the air blower is driven by the rotation of the brake disk, so there is no need for a dedicated drive source or the like, and an external device such as when the dedicated drive source is an electric motor. There is also an advantage that no power supply is required.

  In addition, when the raising / lowering direction of the car is reversed, the rotation direction of the brake disk 3 is also reversed, and the rotation direction of the rotating body 129 is also reversed. Therefore, every time the raising / lowering direction of the car changes, the suction air and the discharge air are interchanged before and after the rotating body 129. Therefore, for each flow path composed of the cover 137, the duct 27, the second ventilation path 25, the first ventilation path 23, and the gas outlet 15, any portion in the flow path (in the illustrated example, the duct 27 and the second ventilation path). It is preferable to provide a dust collection filter 139 at the boundary with the passage 25 because it can capture the wear powder using suction air.

Embodiment 3 FIG.
FIG. 4 is a diagram specifically showing the state of airflow with respect to the disc brake device in the third embodiment. The disc brake device 201 for an elevator hoisting machine according to the third embodiment is the same as the disc brake device of the first embodiment except for the parts described below.

  In the disc brake device 201 according to the third embodiment, a rotating body 129 having the same configuration and driving mode as that of the second embodiment is provided as a blower. The rotating body 129 is accommodated in the casing 237.

  A first outflow passage 241 and a second outflow passage 243 are provided before and after the rotating body 129. One end of the first outflow path 241 and one end of the second outflow path 243 are each connected to the casing 237. The other end of the first outflow path 241 and the other end of the second outflow path 243 are each connected to a corresponding duct 27. Further, the ducts 27 distributed to both sides of the brake disk 3 are connected by a communication part 227.

  A first atmosphere release portion 245 and a second atmosphere release portion 247 are formed on the front side and the rear side of the rotating body 129 in the casing 237, respectively. In addition, the first outlet 241, the second outlet 243, the first atmosphere opening portion 245, and the second atmosphere opening portion 247 are each provided with a valve body of the valve means 249.

  The valve means 249 has the first outflow path 241 and the second outflow path 243 only in the direction of sending air to the second ventilation path 25 when the rotating body 129 also rotates forward / reversely in accordance with forward / reverse rotation of the brake disk 3. The opening and closing of the first outflow passage 241, the second outflow passage 243, the first atmosphere opening portion 245 and the second atmosphere opening portion 247 is switched so as to function. In other words, the valve means 249 is configured to supply only the discharge air generated on one side of the rotating body 129 to the gas outlets 15 on both sides of the brake disk 3 via the duct 27 and the communication portion 227. Control of opening and closing of the outflow passage 241, the second outflow passage 243, the first atmosphere opening portion 245 and the second atmosphere opening portion 247 is controlled.

  Also in this third embodiment, when the brake disk 3 rotates as the elevator car moves up and down, the rotating body 129 is also driven to rotate, and the airflow generated in the rotating body 129 is braked via the gas outlet 15. It acts on the contact surface 13 of the piece 5. As a result, as in the case of the first embodiment, even when the brake piece continues to be rubbed against the brake disc, the action of blowing off the abrasion powder of the brake piece by the gas ejected from the gas outlet can be obtained. Stabilization of contact between the disc and the brake piece can be achieved while avoiding prolonged work.

  Further, in the third embodiment, as in the second embodiment, there is an advantage that a dedicated drive source or the like is not necessary and an external power source is not necessary. Moreover, while eliminating the need for a dedicated drive source or external power source as described above, the airflow supplied to the brake pieces on both sides of the brake disk is always only the discharge air, even if the raising / lowering direction of the car is switched, Even if a dust collection filter or the like is not provided, dust can be prevented from reaching the rotating body. This also eliminates the need to use a filter, leading to the advantage that problems such as a decrease in the effect of removing abrasion powder due to clogging and an increase in airflow distribution resistance that may occur when there is a filter are not likely to occur in the first place. ing.

  Although the contents of the present invention have been specifically described with reference to the preferred embodiments, various modifications can be made by those skilled in the art based on the basic technical idea and teachings of the present invention. It is self-explanatory.

  In addition, regarding the said Embodiment 1-3, the groove | channel of the above-mentioned FIG. 2 of a braking piece is the example to the last, and this invention is not limited to this form. Therefore, to give another example, the groove can be formed as a plurality of lattice-like streaks extending in two orthogonal directions as shown in FIG. 5, or as shown in FIG. It can also be formed as a plurality of streaks extending radially from the spout.

  1, 101, 201 Disc brake device for elevator hoisting machine, 3 Brake disc, 5 Brake piece, 7 Plunger, 13 Contact surface, 15 Gas outlet, 17 Groove, 19 Side surface, 23 First ventilation path, 25 Second Ventilation path, 27 duct, 129 rotator, 241 first outflow path, 243 second outflow path, 249 valve means.

Claims (9)

Brake disc,
At least one braking piece selectively pressed against the brake disc;
A plunger that supports the brake piece and moves the brake piece relative to the brake disc;
On the contact surface of the brake piece that contacts the brake disc, a gas outlet is opened.
Disc brake device for elevator hoisting machines. A groove is formed on the contact surface of the braking piece on the side in contact with the brake disc,
The gas ejection port communicates with the groove so that gas can be supplied to the groove while being pressed against the brake disc.
A disc brake device for an elevator hoisting machine according to claim 1. The groove opens to the contact surface of the braking piece and also opens to a side surface around the contact surface of the braking piece.
A disk brake device for an elevator hoist according to claim 2. Each of the braking piece and the plunger has a ventilation passage therethrough,
The ventilation path is connected to the gas outlet.
A disc brake device for an elevator hoist according to any one of claims 1 to 3. A rotating body that generates a flow of air by rotating, and a duct,
The rotating body is in frictional contact with the brake disc and is driven by the rotational force of the brake disc,
The duct guides the air flowing by the rotating body to the ventilation path.
A disc brake device for an elevator hoist according to claim 4. A first outflow path and a second outflow path are provided separately before and after the rotating body,
Valve means is provided in the first outflow path and the second outflow path,
In the valve means, the first outflow path and the second outflow path function only in the direction of sending air to the ventilation path when the rotating body also rotates forward and reverse as the brake disk rotates forward and backward. Switching between opening and closing of the first outflow path and the second outflow path,
6. A disc brake device for an elevator hoist according to claim 5. Elevator hoisting machine comprising a brake disc, at least one braking piece that is selectively pressed against the brake disc, and a plunger that supports the braking piece and moves the braking piece relative to the brake disc Prepare a disc brake device for
From the gas jet opening opened on the contact surface of the braking piece on the side contacting the brake disc, gas is ejected to remove dust attached to the braking piece,
A dust removing method in a disc brake device for an elevator hoisting machine. A groove is formed on the contact surface of the braking piece on the side in contact with the brake disc,
Communicating the gas outlet with the groove;
The gas ejected from the gas ejection port is supplied to the groove while being pressed against the brake disc.
A dust removing method in a disc brake device for an elevator hoist according to claim 7. Each of the braking piece and the plunger has a ventilation passage therethrough,
The ventilation path is connected to the gas outlet,
Gas is supplied to the gas outlet through the ventilation path.
The dust removal method in the disc brake device for elevator hoists according to claim 7 or 8.

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