JP2009046235A - Braking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a braking device for an elevator hoisting device capable of facilitating a stroke adjustment of a shoe. <P>SOLUTION: A pull back rubber 9 is mounted on a guide member 20 and one end of the pull back rubber 9 is made to abut on the shoe 6. A recessed part extending in the stroke direction of a spherical bolt 5 is provided on a back face of the shoe 6, and a spherical seat 8 is movably fitted in the recessed part of the shoe 6. A cushion rubber 7 is provided between the recessed part of the shoe 6 and a bottom face of the spherical seat 8. During braking, the shoe 6 is extruded by the spherical bolt 5 and proceeds toward a drum 1. Rotation is braked by the shoe 6 pressing the drum 1. At this time, accompanying the procession of the shoe 6, the pull back rubber 9 is elastically deformed in a V-shape. During non-braking, the shoe 6 recedes from the drum 1 accompanying elastic recovery of the pull back rubber 9. Thereby, a stroke adjustment of the shoe 6 can be performed by an amount of elastic deformation of the pull back rubber 9. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a brake device for an elevator hoisting machine, for example.

  In a brake device using an inwardly expanding drum brake as found in Patent Documents 1 to 3, a shoe is provided in connection with a movable iron core. The inward-expanding drum brake presses the shoe against the drum in order to brake the rotation of the drum, but it is desirable that the impact noise between the shoe and the drum during braking is small. For this purpose, the gap between the shoe and the drum needs to be set strictly. However, it is difficult to strictly adjust the movable iron core that advances and retreats toward the drum and the advance / retreat amount (stroke amount) of the shoe.

Specifically, a brake device for an elevator hoisting machine advances or retracts a shoe with respect to the drum by an electromagnet mechanism to brake or release the drum. For example, when an elevator car stops on each floor, the brake device brakes and holds the drum by stroking the shoe and pressing it against the drum from a brake release state where the shoe is separated from the drum. At this time, if the separation distance between the drum and the shoe is large, a collision sound when the shoe is pressed against the drum is increased, which gives passengers an uncomfortable feeling. Therefore, it is necessary to adjust a minute stroke amount so that the separation distance between the drum and the shoe becomes minute.
The conventional brake device is a direct acting brake in which the shoe is linearly moved while being guided by a guide member, and has a structure in which the shoe and the movable iron core are integrally stroked. Therefore, the stroke amount of the movable iron core is adjusted. Thus, the stroke amount of the shoe is adjusted.
The stroke amount is adjusted during braking, that is, in a state where the movable iron core is pressed in the drum direction by the pressing spring of the electromagnet mechanism. The force of the pressing spring is so large that it becomes difficult to adjust the stroke amount. Yes.
International Publication No. WO2004 / 036080 Pamphlet JP 2005-178969 A International Publication No. WO2005 / 019085 Pamphlet

  An object of the present invention is, for example, to obtain a brake device for an elevator hoisting machine in which the stroke adjustment of a shoe (brake shoe, braking member) is easy.

The brake device according to the present invention includes a rotating drum, a fixedly arranged guide member, a braking member having a side portion facing the guide member and a front portion facing the drum, and the braking device. An electromagnet mechanism that pushes a member toward the drum and presses the front portion of the braking member against the drum to brake the rotation of the drum;
The brake member is connected to the side portion of the brake member and the guide member, and is elastically deformed when the brake member is pushed toward the drum during braking by the electromagnet mechanism, and elastically deformed when the brake is released by the electromagnet mechanism. An elastic body is provided that pulls back the brake member from the drum as it is restored from the state.

  According to the present invention, for example, the stroke of the shoe can be adjusted by using an elastic body having specific elastic characteristics.

Embodiment 1 FIG.
FIG. 1 is a front sectional view of a hoisting machine 100 according to the first embodiment.
In FIG. 1, in order to show an internal structure about the hoisting machine 100 in Embodiment 1, the sectional view seen from the front is shown.
The hoisting machine 100 according to the first embodiment will be described below with reference to FIG.

  The elevator hoisting machine 100 includes a drum 1 (brake body) that rotates around the central axis of the housing 10 inside the housing 10 (base body), and an inner expansion type, A dynamic brake device 101 and a guide member 20 fixed along the inner periphery of the drum 1 are provided.

  The brake device 101 includes a shoe 6 (braking member) in which side portions (upper and lower portions in FIG. 1) face the guide member 20 and a front portion (left side or right side in FIG. 1) faces the drum 1. The shoe 6 is pushed toward the drum 1 and the lining 26 (friction material) attached to the front portion (in the pushing direction) of the shoe 6 is pressed against the inner peripheral surface (braking surface 21) of the drum 1 to And an electromagnet mechanism 102 that brakes rotation.

The electromagnet mechanism 102 includes a fixed iron core 2 fixedly arranged, a movable iron core 3 arranged opposite to the fixed iron core 2 between the fixed iron core 2 and the shoe 6, and a tip portion attached to the movable iron core 3. A spherical bolt 5 (pressing shaft) that extends toward the shoe 6 side, a pressing spring 4 that pushes the movable iron core 3 toward the shoe 6 during braking and pushes the shoe 6 toward the drum 1 at the head of the spherical bolt 5, and brake release Sometimes, it has an electromagnetic coil 11 that attracts the movable iron core 3 to the fixed iron core 2 to pull back the spherical bolt 5, and a retaining nut 25 that fixes the spherical bolt 5 to the movable iron core 3.
The electromagnet mechanism 102 advances the spherical bolt 5 toward the shoe 6 at the time of braking, and retreats the head of the spherical bolt 5 from the shoe 6 at the time of releasing the brake.
The length of the spherical bolt 5 protruding from the movable iron core 3 is adjusted by a set nut 25, and the stroke amount (advance / retreat amount) of the spherical bolt 5 depends on the length of the spherical bolt 5 protruding from the movable iron core 3.

  The guide member 20 is disposed with a gap of about several millimeters on both side surfaces of the shoe 6 in a direction perpendicular to the advancing / retreating direction of the shoe 6 (vertical direction in FIG. 1). Guide straight to 21. In FIG. 1, the guide member 20 is provided in an arc shape above and below the brake device 101 so as to sandwich the two shoes 6 on the left and right sides from the side, and each of the upper and lower guide members 20 has left and right ends at the shoe 6. The drum 1 is located upstream or downstream in the rotation direction.

The shoe 6 is disposed on the inner peripheral side of the drum 1 such that the front surface faces the braking surface 21 of the drum 1 and is provided on the left and right in FIG. The front surface of the shoe 6 forms an arcuate convex surface along the braking surface 21 of the drum 1.
Each shoe 6 is guided by the guide member 20 by the electromagnet mechanism 102 and advances and retreats linearly with respect to the braking surface 21 of the drum 1.

  The rotation of the drum 1 is braked when the braking surface 21 is pressed by the lining 26 of the shoe 6, and the braking of the rotation is released when the lining 26 of the shoe 6 moves away from the braking surface 21.

1, the brake device 101 according to the first embodiment is connected to the side portions of the shoe 6 (the upper end portion and the lower end portion of the shoe 6 in FIG. 1) and the guide member 20, and the shoe 6 is braked by the electromagnet mechanism 102. Is provided with a pull-back rubber 9 (elastic body) that is elastically deformed as it is pushed toward the drum 1 and that pulls back the shoe 6 from the drum 1 when the electromagnet mechanism 102 is released from the elastic deformation state when the brake is released. It is characterized by that.
The brake device 101 according to the first embodiment has a recess that engages with the head of the spherical bolt 5, is disposed between the shoe 6 and the head of the spherical bolt 5, and moves in the forward and backward direction of the spherical bolt 5. A spherical seat 8 that is movable is provided. The shoe 6 has a recess into which the spherical seat 8 is fitted, and the spherical seat 8 moves in the stroke direction (advancing and retracting direction) of the spherical bolt 5 in the recess of the shoe 6.
The brake device 101 according to the first embodiment is characterized in that a cushion rubber 7 (elastic member) is provided between the inner bottom surface of the recess of the shoe 6 and the bottom surface of the spherical seat 8.
In the brake device 101 according to the first embodiment, the head of the spherical bolt 5 is not fixed to the shoe 6, that is, the spherical bolt 5 and the shoe 6 do not integrally stroke in the advancing / retreating direction with respect to the drum 1. The tensile force of the spherical bolt 5 is not transmitted to the shoe 6. The shoe 6 is pushed out by the spherical bolt 5 and advances toward the drum 1, and is pulled back by the pull-back rubber 9 and retracts from the drum 1.

FIG. 2 is an enlarged view of the brake device 101 according to the first embodiment when not braking.
FIG. 2 shows an enlarged peripheral portion of the shoe 6 on the left side of FIG. 1 when the brake device 101 in the first embodiment is not braked.
Details of the characteristics of the brake device 101 and the operation of the brake device 101 during non-braking will be described below with reference to FIG.

Each of the shoe 6 and the guide member 20 has an L-shaped side portion, and has a flat sliding surface 36 and a guide surface 35 extending in the stroke direction of the spherical bolt 5 at the protruding tip portion forming the L-shape. In addition, it has a contact portion 38 and an attachment portion 37 that form an L-shaped recess.
The guide surface 35 of the guide member 20 and the sliding surface 36 of the shoe 6 face each other. When the shoe 6 advances and retreats with respect to the braking surface 21 of the drum 1, the sliding surface 36 slides on the guide surface 35 of the guide member 20. And is guided linearly with respect to the braking surface 21 of the drum 1 by the guide surface 35 of the guide member 20.
One end of the pullback rubber 9 is fixed to the mounting portion 37 of the guide member 20 by the mounting screw 32, and the pullback rubber 9 can be removed by the mounting screw 32. Thereby, when the pull-back rubber 9 is deteriorated, it can be replaced. For example, the pullback rubber 9 is a plate-like rubber.
Further, the other end of the pull-back rubber 9 comes into contact with the contact portion 38 of the shoe 6 without being fixed. Hereinafter, the surface with which the end portion of the pull-back rubber 9 contacts in the contact portion 38 of the shoe 6 is referred to as a contact surface 34. The end of the pull-back rubber 9 is in contact with the contact surface 34 of the shoe 6 with a predetermined frictional force.
The pull-back rubber 9 is fixed to the attachment portion 37 of the guide member 20, contacts the contact portion 38 of the shoe 6, and is connected to the side portion of the guide member 20 and the side portion of the shoe 6.

  Further, the shoe 6 has a concave portion 33 on the back surface, and the concave portion 33 of the shoe 6 is located at the stroke tip of the head of the spherical bolt 5.

The recess 33 of the shoe 6 forms a groove extending in the stroke direction of the spherical bolt 5 in the cross section. A spherical seat 8 having a concave spherical surface on the upper surface is fitted into the concave portion 33 of the shoe 6 with the upper surface facing the spherical bolt 5, and a cushion rubber 7 is provided between the spherical seat 8 and the bottom surface.
Further, the head of the spherical bolt 5 forms a convex spherical surface, and the convex spherical surface formed by the head of the spherical bolt 5 and the concave spherical surface formed by the upper surface of the spherical seat 8 are engaged.
The spherical seat 8 moves while sliding on the side surface in the recess 33 of the shoe 6 in accordance with the stroke of the spherical bolt 5.

During non-braking, the electromagnet mechanism 102 energizes the electromagnetic coil 11 to excite the fixed iron core 2 and attracts the movable iron core 3 to the fixed iron core 2 against the extension force of the pressing spring 4.
The shoe 6 is held by the pull-back rubber 9 at a position where the lining 26 is separated from the braking surface 21 of the drum 1.

FIG. 3 is an enlarged view of the brake device 101 according to the first embodiment during braking.
In FIG. 3, the brake device 101 according to the first embodiment is shown by enlarging the peripheral portion of the shoe 6 on the left side of FIG. 1.
The braking operation of the brake device 101 in the first embodiment will be described below with reference to FIG.

  At the time of braking, the electromagnet mechanism 102 cuts off the energization of the electromagnetic coil 11 so that the stationary iron core 2 is not excited, and the movable iron core 3 is pushed outward by the extension force of the pressing spring 4 to obtain a braking force. At this time, the spherical bolt 5 attached to the movable iron core 3 advances toward the shoe 6. The spherical bolt 5 pushes the spherical seat 8 at the head, advances the shoe 6 toward the drum 1 via the spherical seat 8 and the cushion rubber 7, and presses the lining 26 of the shoe 6 against the braking surface 21 of the drum 1. To do. The rotation of the drum 1 is braked when the lining 26 of the shoe 6 is pressed against the braking surface 21.

At this time, the pull-back rubber 9 is elastically deformed into a dogleg shape as the shoe 6 advances toward the drum 1.
Further, the cushion rubber 7 is crushed between the bottom surface of the spherical seat 8 pushed out by the spherical bolt 5 and the bottom surface in the recess 33 of the shoe 6.

  The gap (interval) between the fixed iron core 2 and the movable iron core 3 at the time of braking is the gap between the shoe 6 (the lining 26 thereof) and the braking surface 21 of the drum 1 and the crushed width of the cushion rubber 7 at the time of non-braking. The sum of Further, the gap between the fixed iron core 2 and the movable iron core 3 at the time of braking is the same as the extension width of the pressing spring 4, the pushing length of the spherical bolt 5 by the pressing spring 4, and the stroke width of the spherical bolt 5.

Thereafter, when releasing the braking, the electromagnet mechanism 102 energizes the electromagnetic coil 11 to pull the movable iron core 3 back to the fixed iron core 2. When the movable iron core 3 is pulled back, the spherical bolt 5 is retracted to the fixed iron core 2 side, and the pressing force of the spherical bolt 5 against the spherical seat 8, the cushion rubber 7, and the shoe 6 is released.
As the return rubber 9 elastically deformed at the time of braking returns to the state before the deformation by the restoring force, the shoe 6 is pulled back so as to retract from the drum 1, and a gap is provided between the shoe 1 and the drum 1.
Thus, the brake device 101 enters the non-braking state shown in FIG. 2 and releases the braking force on the drum 1.
That is, the brake device 101 according to the first embodiment releases the brake on the drum 1 by retracting the shoe 6 from the drum 1 by the restoring force of the rubber 9.
Further, as the cushion rubber 7 crushed at the time of braking returns to the state before being crushed by the restoring force, the spherical core 8 follows the spherical bolt 5 while sliding on the recess 33 of the shoe 6, and the fixed iron core 2. Pushed back to the side.

  As described above, since the advance / retreat of the shoe 6 is due to the elastic deformation of the pullback rubber 9, the advance / retreat amount is different from the advance / retreat amount of the movable iron core 3 and is an amount corresponding to the elastic deformation amount of the pullback rubber 9. That is, in the brake released state, the shoe 6 stops retreating with the retracted rubber 9 restored, but the movable iron core 3 further retreats by the amount of restoration of the cushion rubber 7 in the recess 33 of the shoe 6.

The brake device 101 according to the first embodiment is characterized in that the shoe 6 does not move backward together with the spherical bolt 5 but moves back by an amount corresponding to the elastic deformation amount of the pull-back rubber 9.
Further, by providing a cushion rubber 7 between the spherical seat 8 and the shoe 6, the collision sound between the spherical seat 8 and the shoe 6 is reduced during braking.

FIG. 4 is an enlarged view of the brake device 101 in the initial state according to the first embodiment when the brake device 101 is not braked.
FIG. 5 is an enlarged view in the middle of the braking operation of the brake device 101 according to the first embodiment.
4 and 5, the brake device 101 according to the first embodiment is shown with an enlarged peripheral portion of the shoe 6 on the left side of FIG. 1.
As described above, since the pullback rubber 9 is not fixed to the shoe 6, when the shoe 6 advances toward the drum 1 by a certain amount or more during braking, the contact surface 34 of the shoe 6 and the end of the pullback rubber 9 are used. Slip occurs between the two.
The relationship between the shoe 6 and the pull-back rubber 9 when slipping will occur will be described below with reference to FIGS.

Here, as shown in FIG. 4, the pull-back rubber 9 is brought into contact with the bent portion (the base of the contact surface 34) of the contact portion 38 of the shoe 6, and the shoe 6 is attached in a state of being most separated from the drum 1. Shall be.
When the brake device 101 starts a braking operation from this initial state, a frictional force is generated between the contact surface 34 of the shoe 6 and the end of the pull-back rubber 9 when the shoe 6 is pushed toward the drum 1. . The end portion of the pullback rubber 9 advances toward the drum 1 together with the shoe 6 by this frictional force, and the pullback rubber 9 is elastically deformed into a dogleg shape as shown in FIG.
In FIG. 5, since the lining 26 of the shoe 6 and the braking surface 21 of the drum 1 are separated from each other, the shoe 6 is further pushed out toward the drum 1.
At this time, from the state where the frictional force between the contact surface 34 of the shoe 6 and the end of the pullback rubber 9 and the elastic deformation force of the pullback rubber 9 are balanced, the shoe 6 overcomes the frictional force and moves further. And slipping rubber 9 occur.

The pull-back rubber 9 bends deeper in proportion to the amount of the shoe 6 pushed toward the drum 1, and reduces the frictional force generated between the shoe 6 and the contact surface 34 of the shoe 6. When the pull-back rubber 9 is bent by a certain amount or more, that is, when the shoe 6 is pushed toward the drum 1 by a certain amount or more, the slip rubber slips between the contact surface 34 of the shoe 6 and the end of the pull-back rubber 9. Thereafter, the end portion of the pull-back rubber 9 slides on the contact surface 34 of the shoe 6.
That is, when the shoe 6 moves toward the drum 1 beyond the amount of deformation allowed by the pullback rubber 9, the shoe 6 is pushed out from the contact portion with the pullback rubber 9 in the initial state, so that the pullback rubber 9 exceeds a certain amount. Does not deform.

  When the brake device 101 slips between the shoe 6 and the pullback rubber 9 at the time of braking, the pullback rubber 9 is in contact with the abutting portion 38 of the shoe 6 at a position shifted backward from the bent portion in FIG. It becomes a state. Then, after the brake is released, the brake device 101 is in the state shown in FIG. That is, the retraction amount of the shoe 6 at the time of releasing the brake does not coincide with the retraction amount of the spherical bolt 5 and is an amount corresponding to the deformation amount of the pull-back rubber 9.

As described above, when the pullback rubber 9 is deformed by a predetermined amount, the shoe 6 slips. Therefore, even if the shoe 6 greatly advances in the direction of the drum 1, the amount by which the shoe 6 moves backward is the deformation of the pullback rubber 9. It is kept constant according to the amount. In other words, the shoe 6 and the drum 1 are not separated more than necessary.
Thereby, the brake device 101 in Embodiment 1 can suppress the collision sound between the shoe 6 and the drum 1 during braking.
Further, the brake device 101 according to the first embodiment uses the pullback rubber 9 having different elastic characteristics, or attaches the pullback rubber 9 by changing the contact state with respect to the contact surface 34 of the shoe 6, thereby moving the movable iron core 3. The advance / retreat amount of the shoe 6 can be set and adjusted to a predetermined amount independently of the advance / retreat amount. That is, the brake device 101 according to the first embodiment makes it easy to adjust the distance between the drum 1 and the shoe 6 by adjusting the pull-back rubber 9.
Further, when the retraction amount of the movable iron core 3 is large, the spherical seat 8 and the spherical bolt 5 are separated from each other. However, since the spherical seat 8 is fitted in the concave portion 33 of the shoe 6, it does not fall off. In other words, the length of the spherical bolt 5 protruding from the movable iron core 3 is adjusted so that the spherical seat 8 does not fall out of the recess 33 of the shoe 6 by suppressing the spherical seat 8 with the head of the spherical bolt 5 during non-braking. Good.

In the first embodiment, the brake device 101 of the elevator hoisting machine 100 as described below has been described.
The brake device 101 is disposed as an inwardly expanding drum brake on the inner peripheral side of the rotor drum (drum 1), and has a pressing spring 4 attached to the fixed iron core 2 and an electromagnetic attraction force for releasing the pressing force of the pressing spring 4. An electromagnet mechanism 102 that linearly moves the movable iron core 3 in the radial direction of the drum 1 by the generated electromagnetic coil 11 is provided. The braking device 101 obtains a braking force against the drum 1 by applying a pressing force of the pressing spring 4 to the shoe 6 via the spherical seat 8 by the spherical bolt 5 attached to the movable iron core 3. The shoe 6 is guided in the sliding direction by the guide member 20 of the housing 10.
The brake device 101 is provided on the guide member 20 so that the pullback rubber 9 is in contact with the shoe 6, and the shoe 6 deforms the pullback rubber 9 in the traveling direction during braking. At this time, when the stroke of the shoe 6 exceeds the allowable deformation amount of the pull-back rubber 9, the pull-back rubber 9 and the shoe 6 slide, and the pull-back rubber 9 does not deform beyond a certain level. During non-braking, the brake device 101 releases the pressing force of the pressing spring 4, pulls back the shoe 6 by returning the deformed pull-back rubber 9, and provides a gap between the shoe 6 and the drum 1.
In the brake device 101, the stroke amount of the shoe 6 is automatically adjusted to the stroke amount corresponding to the deformation of the pull-back rubber 9, so that adjustment of the stroke amount of the shoe 6 becomes unnecessary. Further, since the stroke amount of the movable iron core 3 may be equal to or larger than the stroke amount of the shoe 6, the stroke amount of the movable iron core 3 can be easily adjusted.

  Further, the brake device 101 is provided so that the pullback rubber 9 can be replaced with the guide member 20, and the function can be restored by replacing the pullback rubber 9 even when the function of the pullback rubber 9 is deteriorated due to aging. it can.

  The brake device 101 is attached so that the spherical seat 8 is slidable in the advancing and retracting direction of the shoe 6 with respect to the shoe 6 and follows the return of the spherical bolt 5. Further, the brake device 101 reduces the collision noise between the shoe 6, the spherical seat 8, and the spherical bolt 5 by arranging the cushion rubber 7 between the shoe 6 and the spherical seat 8.

  In the first embodiment, the pull-back rubber 9 is shown as a plate-like rubber. However, the pull-back rubber 9 may be a rod-shaped rubber or a coil spring, and is attached in contact with the contact surface 34 of the shoe 6 with elastic characteristics. It only has to be done.

FIG. 6 is an enlarged view of the brake device 101 according to the first embodiment, and shows an enlarged peripheral portion of the shoe 6 on the left side of FIG.
In addition, as shown in FIG. 6, the spherical bolt 5 and the spherical seat 8 may be integrated by engaging a leaf spring 31 attached to the spherical seat 8 with the head of the spherical bolt 5.

Embodiment 2. FIG.
In the second embodiment, a brake device 101 in which an elastic body is provided between the guide member 20 and the shoe 6 in a form different from the pullback rubber 9 in the first embodiment will be described.
Hereinafter, matters different from those in the first embodiment will be mainly described, and items that will not be described are the same as those in the first embodiment.

FIG. 7 is a front sectional view of the hoisting machine 100 according to the second embodiment, and corresponds to FIG. 1 of the first embodiment.
As shown in FIG. 7, the brake device 101 of the hoisting machine 100 according to the second embodiment extends the shoe 6 in the vertical direction, and a pull-back spring 41 (elastic body) between the extended portion of the shoe 6 and the guide member 20. ). The pull-back spring 41 is a substitute for the pull-back rubber 9 in the first embodiment. As a result, as in the first embodiment, the shoe 6 advances and retreats by an amount corresponding to the amount of elastic deformation of the return spring 41.
The pull-back spring 41 is a coil spring that expands and contracts in the advancing and retracting direction of the shoe 6. However, the pull-back spring 41 may be a rod-like rubber and may have any elastic characteristics.

FIG. 8 is an enlarged view of the brake device 101 according to the second embodiment at the time of non-braking, and corresponds to FIG. 2 of the first embodiment.
FIG. 9 is an enlarged view of the brake device 101 according to the second embodiment during braking, and corresponds to FIG. 3 of the first embodiment.
As shown in FIGS. 8 and 9, the brake device 101 according to the second embodiment includes a brim portion 42 in which the shoe 6 extends toward the guide member 20, and the pull-back spring 41 serves as the brim portion 42 of the shoe 6 and the guide member. 20 and elastically expands and contracts in the advancing and retracting direction of the shoe 6. That is, the retracting spring 41 contracts during braking shown in FIG. 9 to advance the shoe 6 toward the drum 1, expands and restores during non-braking shown in FIG. 8, and retracts the shoe 6 from the drum 1.

  As in the first embodiment, the brake device 101 according to the second embodiment replaces the elastic body (retraction spring 41) disposed between the guide surface 35 and the shoe 6 as appropriate, so that the drum 1 during non-braking is provided. And the shoe 6 can be adjusted. Therefore, the brake device 101 according to the second embodiment can easily adjust the distance between the drum 1 and the shoe 6 during non-braking, and can suppress the collision sound between the drum 1 and the shoe 6.

FIG. 10 is an enlarged view of another example of the brake device 101 according to the second embodiment at the time of non-braking, and corresponds to FIG.
As shown in FIG. 10, the brake device 101 according to the second embodiment includes a flange portion 43 in which the guide member 20 extends toward the shoe 6, and a pull-back spring between the flange portion 43 of the guide member 20 and the shoe 6. 41 may be arranged.

Embodiment 3 FIG.
In the first embodiment and the second embodiment, the hoisting machine 100 in which the brake device 101 is installed on the inner peripheral side of the drum 1 has been described.
In the third embodiment, a hoisting machine 100 in which a brake device 101 is installed on the outer peripheral side of the drum 1 will be described.
Hereinafter, matters different from those in the first embodiment and the second embodiment will be mainly described, and items that will not be described are the same as those in the first embodiment or the second embodiment.

FIG. 11 is a front cross-sectional view of the hoisting machine 100 according to the third embodiment, and corresponds to FIG. 1 of the first embodiment.
FIG. 12 is a front cross-sectional view of the hoisting machine 100 according to the third embodiment, and corresponds to FIG. 7 of the second embodiment.
As shown in FIGS. 11 and 12, the hoisting machine 100 according to the third embodiment is characterized in that the brake device 101 is installed on the outer peripheral side of the drum 1.
The housing 10 has a mounting portion 51 that protrudes to the outer peripheral side of the drum 1, and the electromagnet mechanism 102 is fixed to the mounting portion 51 of the housing 10 by mounting bolts 52. The electromagnet mechanism 102 includes a guide member 53 that extends in an arc shape so as to sandwich the shoe 6 from the side portion in the vertical direction. The shoe 6 is disposed on the outer peripheral side of the drum 1 such that the front surface faces the braking surface 21 of the drum 1, and the front surface of the shoe 6 forms an arcuate concave surface along the braking surface 21 of the drum 1.
The electromagnet mechanism 102 presses the shoe 6 from the outer peripheral side of the drum 1 toward the braking surface 54 (outer peripheral surface) of the drum 1 to brake the rotation of the drum 1.

1 is a front sectional view of a hoisting machine 100 according to Embodiment 1. FIG. The enlarged view at the time of the non-braking of the brake device 101 in Embodiment 1. FIG. FIG. 3 is an enlarged view of the braking device 101 according to Embodiment 1 during braking. FIG. 3 is an enlarged view of the brake device 101 in the initial state in the first embodiment when not braking. The enlarged view in the middle of the braking operation | movement of the brake device 101 in Embodiment 1. FIG. FIG. 3 is an enlarged view of the brake device 101 according to the first embodiment. FIG. 4 is a front sectional view of a hoisting machine 100 according to a second embodiment. The enlarged view at the time of the non-braking of the brake device 101 in Embodiment 2. FIG. The enlarged view at the time of the braking of the brake device 101 in Embodiment 2. FIG. The enlarged view at the time of the non-braking of the brake device 101 of another example in Embodiment 2. FIG. FIG. 6 is a front sectional view of a hoisting machine 100 according to a third embodiment. FIG. 6 is a front sectional view of a hoisting machine 100 according to a third embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Drum, 2 Fixed iron core, 3 Movable iron core, 4 Pressing spring, 5 Spherical bolt, 6 Shoe, 7 Cushion rubber, 8 Spherical seat, 9 Pull-back rubber, 10 Housing, 11 Electromagnetic coil, 20 Guide member, 21 Braking surface, 25 Locking nut, 26 lining, 31 leaf spring, 32 mounting screw, 33 recess, 34 abutting surface, 35 guide surface, 36 sliding surface, 37 mounting portion, 38 abutting portion, 41 retracting spring, 42, 43 flange portion, 51 mounting parts, 52 mounting bolts, 53 guide members, 54 braking surfaces, 100 hoisting machines, 101 brake devices, 102 electromagnet mechanisms.

Claims (8)

A rotating drum, a fixedly arranged guide member, a braking member with a side portion facing the guide member and a front portion facing the drum, and the braking member facing the drum An electromagnet mechanism that pushes and presses the front portion of the braking member against the drum to brake the rotation of the drum;
The brake member is connected to the side portion of the brake member and the guide member, and is elastically deformed when the brake member is pushed toward the drum during braking by the electromagnet mechanism, and elastically deformed when the brake is released by the electromagnet mechanism. A brake device comprising: an elastic body that pulls back the brake member from the drum as the state is restored. The electromagnet mechanism is
A pressing shaft that advances the head toward the braking member during braking, pushes the braking member toward the drum with the head, and retracts the head from the braking member when braking is released;
The pressing shaft of the electromagnet mechanism is
The brake device according to claim 1, wherein the head is not fixed to the braking member. The electromagnet mechanism is
A fixed iron core fixedly arranged;
A movable iron core disposed between the fixed iron core and the braking member;
A pressing shaft having a tip attached to the movable iron core and extending toward the braking member;
A pressing spring that pushes the movable iron core toward the braking member during braking and pushes the braking member toward the drum at the head of the pressing shaft;
An electromagnetic coil that attracts the movable iron core to the fixed iron core and releases the pressing shaft when braking is released;
The pressing shaft of the electromagnet mechanism is
The brake device according to claim 1, wherein the head is not fixed to the braking member. The brake device further includes:
A concave portion that engages with the head portion of the pressing shaft; and a spherical seat that is disposed between the braking member and the head portion of the pressing shaft and is movable in the advancing and retreating direction of the pressing shaft. The brake device according to any one of claims 2 to 3, wherein: The braking member has a recess into which the spherical seat is fitted,
The brake device according to claim 4, wherein the spherical seat moves in the advancing / retreating direction of the pressing shaft in the recess of the braking member. The brake device further includes:
The brake device according to claim 5, further comprising an elastic member between a bottom surface of the concave portion of the braking member and a bottom surface of the spherical seat. 7. The elastic body according to claim 1, wherein one end of the elastic body is fixed to the guide member, and the other end abuts the side portion of the braking member without being fixed. Brake equipment. The brake member has a flange portion extending toward the guide member side,
The brake device according to any one of claims 1 to 6, wherein the elastic body is disposed between the brim portion of the braking member and the guide member.

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