JP3519642B2 - Pad holding structure of brake device for hoisting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize operating sound by uniformly pressing the whole surface of an abutting surface of a brake shoe on a body to be braked at the time of braking and holding the abutting surface of the brake shoe at irreducibly minimum (very small), uniform and equal intervals for the body to be braked, even if an operating unit is slightly misaligned from a fixing member, and to provide a pad holding structure for a blaking device for hoisting machine with a strong braking force and a simple constitution. SOLUTION: A bracket for taking charge of a tangent force acting on a pair of brake shoes 6, 7 is disposed between a magnet part 1 and a planar body 2. The pair of brake shoes 6, 7 are oscillatably supported on pressing members 20, 40 via a plane sliding contact surface part Q and an oscillating sliding contact surface part S. The brake shoes 6, 7 are repulsively drawn to the pressing members 20, 40 sides by repulsive members X, X and the plane sliding contact surface part Q and the oscillating sliding contact surface part S are held in a closely adhering state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pad holding structure for a hoisting machine braking device.

[0002]

2. Description of the Related Art A braked body is subject to an error due to an assembly of minute gaps in movable parts constituting a brake unit, an error due to a mounting method of the brake unit, a weight unbalance of the brake unit after mounting, and a vibration. However, the brake unit may have an inaccurate dimensional positional relationship.

As described above, when the brake unit has an inaccurate dimensional positional relationship with respect to the body to be braked, at the time of braking,
The entire contact surface of the brake shoe cannot be pressed uniformly against the body to be braked, and proper braking force cannot be obtained. In addition, during non-braking, the brake shoes are no longer held at uniform and even intervals with respect to the body to be braked, a part of the brake shoe comes into contact with the body to be braked, and a dragging sound is generated, and the brake shoe is released. Wear unevenly.

[0004]

In order to avoid the occurrence of such a problem, it is possible to solve these problems by increasing the distance between the braked body and the brake shoe. However, when braking from non-braking, if the distance between the braked body and the brake shoe is large,
Since the momentum becomes large, the shock at the time of braking becomes large,
There was a problem that the impact sound at that time also became loud. Also, since the gap is large, the electromagnetic force is reduced,
There was also a problem that a powerful electromagnet and a spring for braking with a large elastic force were required.

Therefore, according to the present invention, the entire contact surface of the brake shoe is uniformly pressed against the body to be braked at the time of braking, even if the actuating unit is slightly deviated from the fixed member. In addition, at the time of non-braking, the contact surface of the brake shoe with respect to the body to be braked is maintained at a required minimum (minute) uniform equal interval (because the brake shoes can ensure equal returning amounts). In this way, the operating noise is minimized, the braking force is strong, and the configuration is simple.
An object of the present invention is to provide a pad holding structure for a hoisting machine braking device.

[0006]

The present invention is configured as follows in order to solve the above-mentioned problems. That is, the bracket for taking charge of the tangent force acting on the pair of brake shoes that reciprocates in the direction of approaching and separating from each other by the pressing member,
The pair of brake shoes are arranged between the electromagnet portion and the plate-like body, and the back plane portions of the pair of brake shoes and the plane portion of the movable-side member of the centripetal joint can slide on a plane. Through a plane sliding contact surface portion and a swinging sliding contact surface portion of the centripetal joint, a shaft bolt that is swingably supported with respect to the pressing member and is screwed to one end side of the pressing member. The mounted elastic member is housed in a housing portion of the brake shoe body which is open at one end, and the elastic member causes a fixed side member formed on one end side of the pressing member together with a movable side member. Being elastically attracted to the above brake shoes,
The flat sliding contact surface portion and the oscillating sliding contact surface portion are held in close contact with each other, and the brake shoe is configured to be slidable and removable with respect to the shaft bolt.

Further, a bracket for taking charge of the tangent force acting on the pair of brake shoes reciprocating toward and away from the braked body by the pressing member is provided between the electromagnet portion and the plate-like body. The pair of brake shoes are arranged, and the rear surface flat surface portion and the flat surface portion of the movable side member of the centripetal joint enable the plane sliding contact surface portions to slide on a plane, and the centripetal joint The oscillating contact surface portion of the pressing member is supported by the oscillating slide contact surface portion so that the oscillating member can be oscillated, and the elastic member provided in the hole portion of the pressing member via the axial bolt allows The fixed side member formed on the one end side is elastically attracted to the brake shoe together with the movable side member, and the flat sliding contact surface portion and the swinging sliding contact surface portion are held in a close contact state, Regulate the brake shoes The restricting member is detachably attached, and the brake shoe elastically supported by the bolt head of the shaft bolt is slid with respect to the shaft bolt in the lateral hole of the brake shoe that is open at one end. -It is configured to be removable.

[0008]

DETAILED DESCRIPTION OF THE INVENTION First of all, the basic concept of the present invention is described.
The present invention will be described with reference to the drawings for describing the configuration .

[0009] FIG. 1 is a left side reference diagram of the hoisting machine braking device,
2 is a front reference drawing, and FIG. 3 is a front reference drawing of a partial cross-section.
In these drawings, in the pad holding structure, the conventional caliper is omitted, and instead, the plate-like body 2 is arranged so as to be substantially parallel to the electromagnet portion 1 at a predetermined interval. The fixed iron core 3 of the electromagnet part 1 and the plate-like body 2 are connected and integrated by a plurality of guide rods 4 to form a compact unit U. In addition, 5 is a movable iron core.

Between the electromagnet part 1 and the plate-like body 2 of the unit U, a bracket 8 for taking charge of the tangent force F _t of the pair of brake shoes 6, 7 (details are shown in FIG.
11 ) is provided, and the bracket 8 is fixed to the fixing base member (base frame) of the hoisting machine or other fixing member 10 such as a building by a bolt at the mounting seat portion 13 with a screw hole. .

As shown in FIG. 6, this unit U is mounted on a guide rod 4 slidably fitted in holes 32 at both ends of the upper side of the bracket 8, and the concave groove portion 11 of the bracket 8 (see FIG. 11 ) . In (c), the braked body 9 is provided. The braked body 9 is formed in a disk (disk shape), a plate piece (band plate shape), or the like.

The brake shoes 6 and 7 are arranged so as to face the braked body 9, and each of the plate-like body 2 and the movable iron core 5 has a flat sliding member (17, 193, 17). 213), and spherical sliding members (191 and 193, 211 and 213) and the like, which are integrally mounted by the elastic members X and X so as to be movable back and forth. Then, the side surfaces 6 of both brake shoes 6 and 7
a and 7a are the inner space 15 of the bracket 8 (see FIG. 11 (a))
The tangent force F _t is supported by slidably (slidingly) abutting on the slide surfaces 18, 18 of (1) and is guided (in the direction perpendicular to the paper surface in FIG. 1) to move toward and away from each other.

During non-braking, the coil of the fixed iron core 3 of the electromagnet section 1 in the unit U is energized, and the movable iron core 5 is attracted (by suppressing the main spring force) by the electromagnetic force, and both brake shoes 6 and 7 are separated. On the other hand, during braking, the energization is cut off and the electromagnetic force disappears, and at the same time, the force that attracts the movable iron core 5 disappears, and the movable iron core 5 is forcibly separated from the fixed iron core 3 of the electromagnet part 1 by the main spring force. Then, both brake shoes 6 and 7 approach each other.

Since the plate-shaped body 2 and the fixed iron core 3 are integrally fixed by the guide rods 4 and 4 and the reinforcing rod 27, the movable iron core 5 is fixed to the fixed iron core 3 during braking. On the other hand, when the main spring force forces them to separate from each other, the movable iron core 5 is attracted to the plate-shaped body 2 by the relative principle.

In the present invention, the tangent force F _t is the force received by the brake shoe 6 and 7 that presses the braked body 9 from both sides of the braked body 9 during braking. In the case of a so-called disc in which the braked body 9 rotates, the force acting in the tangential direction from the disc acts on the brake shoes 6, 7, and this is the tangent force F _t . An example is shown by an arrow in FIG. When the braked body 9 moves linearly, the direction of the tangent force is the direction of the linear movement.

Centripetal joints 19 and 21 for oscillating the brake shoes 6 and 7 are arranged between the plate-like body 2 and the electromagnet portion 1 facing each other, and further, the brake shoes 6 and 7. 7 together with centripetal joints 19 and 21, pressing members 20,
Elastic members X, X for biasing and supporting the 40 side are arranged.

As shown in FIGS. 3 and 6, the brake shoes 6 and 7 are each composed of a brake pad portion 16 that directly contacts the braked body 9 and a brake shoe body 17 to which the brake pad portion 16 is fixed. It is formed into a shape and is polymerized and integrated. The brake shoes 6, 7 are swingably supported by a shaft member 20 which is a pressing member and an adjusting screw 40, and the brake shoes 6, 7 and the shaft member 20 and the adjusting screw 40 are elastic members. X and X elastically pull each other, and the swinging contact surface portions S of the centripetal joints 19 and 21 are held in close contact with each other.

More specifically, the shaft member (pressing member) 20 is
It is mounted on the fixed iron core 3 so that it can move back and forth, and its shaft member 20
The stationary member 191 and the movable iron core 5 together with the shaft bolt 22
Are integrally fixed by. The fixed side member 191
The convex spherical surface 192 is in contact with the concave spherical surface 194 of the movable-side member 193 and can be swung (rotated) freely, and a swinging contact surface portion S is formed between both spherical surface portions. .

Further, the flat surface portion of the movable side member 193 and the rear surface flat surface portion of the brake shoe 6 are in contact with each other and are slidable with each other, and a flat surface sliding contact surface portion Q is provided between the both flat surface portions. It is formed. The fixed side member 191 and the movable side member
193 and the brake shoe body 17 are collectively attracted to each other by the elastic member X, and the swinging slide contact surface portion S and the flat slide contact surface portion Q are in a close contact state without generating a gap. Held in.

On the other hand, the adjusting screw (pressing member) 40 is screwed to the plate-like body 2 so as to be able to move forward and backward, and the adjusting screw 40 and the fixed side member 211 are integrally fixed by a shaft bolt 22. . The convex spherical surface 212 of the fixed-side member 211 is in contact with the concave spherical surface 214 of the movable-side member 213 so that it can swing (rotate) freely. Are formed.

Further, the flat surface portion of the movable side member 213 and the rear surface flat surface portion of the brake shoe 7 are in contact with each other and slidable with each other, and a flat surface slide contact surface portion Q is provided between the both flat surface portions. It is formed. Then, the fixed member 211 and the movable member
213 and the brake shoe main body 17 are collectively attracted to each other by the elastic member X, and the swinging slide contact surface portion S and the plane slide contact surface portion Q are in a close contact state without generating a gap. Held in.

Resilient members X, X for elastically urging the oscillating sliding contact surface portion (spherical sliding contact surface portion) S and the flat sliding contact surface portion Q into a close contact state.
Is formed into a rectangular shape by punching or bending an elastic sheet metal, as shown in each of the reference drawings of FIGS. 4 and 5 , and is bent at both side edges thereof. The tips of the formed engaging side portions 41, 41 engage with the upper and lower side portions of the brake shoe body 17, 17 and are raised around the circular hole portions 42, 42 formed by punching in a circular shape. The four engaging pieces 43, which are bent inward, are formed by the centripetal joints 19,
The brake shoe bodies 17, 17 are engaged with the peripheral portions of the fixed-side members 191, 211 of 21 so that the brake-shoe main bodies 17, 17 can swing.
It is biased and supported so as to be attracted to the fixed side members 191 and 211 with the 13 being sandwiched.

With such a structure, both brake shoes 6 and 7 ensure an equal return amount independently of each other (without being restrained by the bracket 8 which is in charge of the tangent force F _t ) during non-braking. Then, the braked body 9
And the brake pad portions 16 and 16 can always form a required minimum (minute) uniform interval. Therefore, a part of the brake pad portions 16, 16 does not come into contact with the moving braked body 9 to generate a dragging noise, and the brake pad portions 16, 16 also have a problem of uneven wear. lost.

During braking, the brake shoes 6,
The tangent force F _t acting on 7 is supported by the bracket 8, and the swing contact surface S of both centripetal joints 19 and 21 and the plane sliding between both centripetal joints 19 and 21 and brake shoes 6 and 7 are performed. By the contact surface portion Q, when the head is shaken so that the entire contact surface of the brake pad portions 16 and 16 is once parallel to the braked body 9, the state is maintained and is always pressed uniformly. , Stable and high braking power can be exerted.

Further, the brake pad portions 16 and 16 at the time of non-braking
However, since the minimum required (minimum) uniform spacing is maintained and it is supported stably without floating, during braking,
The brake pad portions 16 and 16 are in good responsiveness and evenly come into full contact with the body 9 to be braked, and the noisy hit sound generated by partial contact is remarkably accompanied with the ON-OFF switching operation of the electromagnet portion 1. It can be reduced.

Further, even if the space between the brake shoes 6 and 7 is changed by operating the adjusting screw 40, or the space between the brake shoes 6 and 7 is narrowed during braking, the elastic member is elastic. Energizing and supporting state of the brake shoe main bodies 17, 17 with respect to the fixed side members 191, 211 by X, X (urging force)
Since it does not change at all and is always held constant, its supporting state is stabilized, stable braking response can be secured, and rattling or loosening does not occur in the pad holding structure, Durability is also improved.

In summary, the brake shoe side faces 6a, 7
a is a slide surface 18, 18 in the inner space 15 of the bracket 8.
Since the tangent force F _t is supported by this contact surface, the brake shoes 6, 7 are fixed to the fixed other member 10 even though the movement thereof is restricted in the front, rear, left, right and diagonal directions. Even if the unit U is slightly displaced from the bracket 8 on the same axis, the displacement is absorbed by the flat sliding contact surface portion Q and the swing sliding contact surface portion S. On the other hand, the contact surfaces are correct and always contact and separate in parallel with each other with a minimum required gap, so that the operation noise can be suppressed to a small extent and a strong braking force can be obtained.

Explaining the other structure, the bracket 8 for taking charge of the tangent force F _t of both brake shoes 6 and 7 is, as shown in FIG. As shown in (c), it has a recessed groove portion 11 into which the body 9 to be braked is inserted, and the left and right leg portions 12, 12 are branched into two pieces each due to the presence of the recessed groove portion 11. Also, at the lower ends of the left and right legs 12, 12, the mounting seat 1 with screw holes
3 and 13 are formed, and the bracket 8 is fixed to the fixing other member 10 (as shown in FIGS. 1 and 2) by screwing a bolt into the screw hole.

The right and left leg portions 12 of the gate bracket 8,
The brake shoes 6, 7 are held in an inner space 15 surrounded by 12 and the upper side portion 14. A slide surface that receives the side surfaces 6a, 7a at the four corners of the rectangular plate-shaped brake shoes 6, 7 so as to be slidable in the pressing operation direction of the brake shoes 6, 7 (left-right direction in FIG. 6). 18 are provided near the inside of the bracket 8.

In this way, the pair of brake shoes 6, 7
Is enclosed by a bracket 8, is slidable in the pressing operation direction of the brake shoes 6, 7, and is immovable in the direction of the tangent force F _t ,
The bracket 8 is configured to handle it. If the brake shoes 6, 7 are rectangular plates and are received at the four corners thereof, there is an advantage that they can be stably held.

Next, the plate-like body 2 and the like will be described in detail with reference to the drawings. As shown in FIG. 1, the plate-like body 2 has a substantially rhombic shape, and an adjusting screw 40 is attached to the lower end apex, and the left and right apex parts are attached. Is provided with guide rods 4 and 4, and a reinforcing rod is provided at the upper top.
27 are provided. A lock nut 28 is screwed onto the adjusting screw 40.

Then, as shown in FIG. 6, the guide rod 4
Consists of a long bolt 29 and a circular tube body 30, and the bolt 29 is
While being screwed into the screw hole 31 of the fixed iron core 3, both ends of the circular tube body 30 are crimped to the spot facing portion of the fixed iron core 3 and the spot facing portion of the plate-shaped body 2.

The guide rods 4, 4 are inserted into the holes 32, 32 at the upper ends of the gate-shaped bracket 8 shown in FIG. 11 (a), and the inner peripheral surface of the hole 32 and the circular tubular body 30 are inserted. Sliding is possible with the outer peripheral surface. In addition, in FIG. 6, the sliding bush 33
.. are provided in the holes 32 to allow smooth sliding. As described above, the unit U including the electromagnet portion 1, the plate-like body 2, and the guide rods 4 is attached to the bracket 8 so as to be capable of floating in a minute dimension.

The reinforcing rod 27 is strong (in the direction of arrow A) when the brake shoe 6, 7 presses the braked body 9 during braking.
The reaction force prevents the plate-shaped body 2 from falling in a direction in which the distance between the upper top of the diamond-shaped plate-shaped body 2 and the electromagnet part 1 decreases. In other words, one function of the reinforcing rod 27 is a function as a strut rod.

By the way, in FIG. 1, small projecting piece portions 34, 34 are formed on the right and left apexes of the diamond-shaped plate-shaped body 2, while on the other hand, in FIG. Small protruding piece
35 and 35 are formed, and the small protruding piece portions 35 and 35 are respectively
Screw holes 35a, 35a are formed.

As described above, the unit U is mounted on the bracket 8 so that it can float by a minute dimension and can move by the minute gaps B ₁ and B ₂ as shown in FIG. An elastic member 36 that elastically urges the bracket 8 in the direction in which the plate-shaped body 2 separates (leftward in FIG. 2) is provided on the bracket 8. Incidentally, in FIG. 2, the elastic member 36 is composed of a compression coil spring.

Further, a regulating member 37 for regulating the excessive movement of the plate-shaped body 2 in the separating direction (described above) is provided. In FIG. 2, the regulating member 37 is composed of the bolt 38 and the (locking) nut 39 screwed into the screw hole 35a.

As described above, the elastic member 36 and the regulating member 37 are configured to center the unit U, and the brake pad portions 16, 16 of the brake shoes 6, 7 and the braked body 9 ( The air gap (when not braking) can be adjusted.

In particular, as shown in FIG. 2, when the bolt 38 is inserted into the compression coil spring and the elastic member 36 and the regulating member 37 are compactly integrated, the structure can be simplified and the cost can be reduced. There is.

Then, as described above, the centripetal joints 19 and 21
Of the concave and convex spherical surfaces 192, 194 and 212, 214, the swing contact surface portions S, S, the plane portions of the movable side members 193, 213, and the back plane portions of the brake shoes 6, 7. Since the flat sliding contact surface portions Q, Q formed between the two flat surface portions are always urged to be in contact with each other, a gap does not occur, and when the vehicle is not braked, an equal return amount is ensured. And always,
The required minimum gap can be maintained. Therefore, during braking, the operating noise can be suppressed to a small extent, and the operating noise and the dragging noise at the time of switching the braking ON-OFF can be prevented.
In addition, it is possible to obtain a strong braking force with good responsiveness.

Further, the braked body 9 and both brake pad portions 1
Since the gap between 6 and 16 can be uniformly set to the minimum required, the electromagnetic force in the electromagnet unit 1 can be utilized to the maximum extent. Further, the centripetal joints 19 and 21 can be made thin and have a simple structure, and the overall size can be significantly reduced. Further, since the brake shoes 6, 7 and the centripetal joints 19, 21 can be previously integrated by the elastic members X, X, the workability of assembling at the site is remarkably improved.

[0042] FIGS. 7 to 9 show an embodiment of a pad holding structure of the hoisting machine braking apparatus according to the present invention, the pad
The basic structure other than the holding structure is shown in FIGS. 1 to 3 and 6.
The configuration is the same as that described above. And from FIG.
In one embodiment shown in FIG. 9, the shaft member (pressing member) 20
Is attached to the fixed iron core 3 so that it can move back and forth (Fig. 3 and Fig.
6) , the shaft member 20 and the fixed side member 191 are integrally fixed together with the movable iron core 5 by a shaft bolt 22. Further, the adjusting screw (pressing member) 40 is screwed to the plate-like body 2 so as to be able to move forward and backward (see FIGS. 3 and 6) , and one end of the pressing member 40 (20) has a fixed side member 191 (211). ) Is formed, and the concave tapered surface 194t (214t) of the fixed-side member 191 (211) is formed.
Contact the convex spherical surface 192 (212) of the movable-side member 193 (213) and form a swing-sliding contact surface portion S on both surfaces thereof, so that the brake shoe 6 (7) can swing freely. . Then, the rear flat surface portion of the brake shoe 6 (7) and the movable side member 19
The flat portion of 3 (213) slidably abuts on a flat surface to form a flat sliding contact surface portion Q.

A shaft bolt 22 is screwed into the pressing member 20 (40),
On the shaft portion of the shaft bolt 22 immediately below the bolt head 221,
The elastic member X is fitted, and the elastic member X is stored in the storage portion 171 in the brake shoe body 17. The elastic member X is formed into a folded leaf spring as shown in FIG. 8 by punching or bending an elastic sheet metal material. That is, a through hole 46 for a bolt is formed on one end side of a substrate 45 formed in a rectangular shape, and an elastic piece portion 47 formed in a substantially U shape is formed on one end edge thereof.
Is bent.

The elastic member X consists of the through hole 46 and the elastic piece.
47 and a bolt head 22 having a stepped portion of the axial bolt 22.
It is fitted into the shaft portion directly below 1 and is locked by a snap ring (not shown), and its elastic piece portion 47 is stored in the storage portion 171.
The side surface 172 is abutted and biased. With such a configuration, the movable side member 193 (213) and the brake shoe 6 (7) are pulled toward the pressing member 20 (40), and the above-described swinging slide contact surface portion S and the plane slide contact surface portion Q are formed. Can be held in close contact with each other without generating voids, and the same effects as those of the previous embodiment can be obtained.

Also, the storage portion 171 of the brake shoe body 17
Has a cutout portion 171a and is open at one end, so that the brake shoes 6 and 7 can be inserted and removed.
The brake shoes 6, 7 can be pulled out in the left direction in FIG. 7 and can be disassembled, so that when the brake pad portion 16 is worn, it can be easily replaced, repaired, or inspected. Then, at the time of assembly, the brake shoes 6, 7 can be inserted in the right direction with the elastic member X attached to the shaft bolt 22.

FIG. 10 shows another embodiment, in which the pressing member 2
Fixed side members 191 and 211 are formed at one ends of 0 and 40, and an elastic member X that elastically urges the brake shoe 6 (7) together with the centripetal joint 19 (21) toward the pressing member 20 (40). , X are arranged in holes 197, 217 formed in the pressing members 20, 40.

More specifically, the elastic members X, X are coil springs, and shafts for connecting the brake shoe bodies 17, 17 with the movable side members 193, 213 and the fixed side members 191, 211, respectively. Nuts screwed onto bolts 55, 55
56, 56 and the end faces 19 of the holes 197, 217 of the fixed side members 191, 211
Engaged between 7a and 217a.

The shaft bolts 55, 55 penetrate through the movable side members 193, 213, and their bolt heads 551, 551 together with the taper washers 57, 57 form a laterally open end formed on the brake shoe body 17, 17. It is housed in the holes 174, 174.

Reference numeral 58 is a gap for allowing swinging, and a dumb hole (large diameter hole) may be provided in the movable member 193. Further, reference numeral 59 is a regulating member for regulating the upward movement of the brake shoes 6, 7, which is made of spring steel or the like, the upper portion of which is fixed to the bracket 8 by fastening bolts and nuts and extends downward. The tops of the brake shoe bodies 17, 17 are pressed downward by the tips of the legs 591, 591. Further, the configuration of the swinging slide contact surface portion S and the plane slide contact surface portion Q is
This is similar to the case of the reference diagrams shown in FIGS. 3 and 6, and the description thereof will be omitted.

With such a configuration, the elastic member X causes the brake shoe bodies 17, 17 to independently hold the movable side members 193, 213, respectively, and to independently fix the fixed side members 191, 213.
The swinging slide contact surface portion S and the plane slide contact surface portion Q are attracted to 211 and are held in close contact with each other without generating a gap. Therefore, also in this case, it is possible to obtain the same effects as those of the above-described respective embodiments. And the regulation member
By removing 59, there is an advantage that repair, replacement, and inspection of the brake pad portions 16 and 16 are easy (by disassembly).

[0051]

The present invention has the following significant effects with the above-mentioned configuration.

According to the first or second aspect of the present invention, the elastic members X cause the brake shoes 6, 7 to move to the centripetal joint.
Since the oscillating sliding contact surface portion S and the flat sliding contact surface portion Q of 19 and 21 are biased and supported in a direction in which they are brought into close contact with each other, the brake shoes 6 and 7 independently provide equal return amounts (tangent) when not braking. The force F _t can be secured (without being restrained by the bracket 8 which takes charge of the force F _t ), and once the swing is corrected in the centripetal joints 19 and 21, the parallel gap with the braked body 9 is maintained as it is. Therefore, it is possible to keep the braked body 9 at a required minimum (minute) uniform distance without contacting the abutting surface with the braked body 9, and to reduce drag noise as in the conventional case. Eliminates the occurrence and braking ON-OF
It is possible to eliminate the noisy hit sound that occurs each time the F is switched. That is, even if the unit U has some deviation on the same axis with respect to the bracket 8 fixed to the fixing other member 10, the deviation is absorbed by the plane sliding contact surface portion Q and the swing sliding contact surface portion S. With respect to the body 9 to be braked, the abutting surface always abuts and separates in parallel with a minimum required gap, so that the operating noise can be suppressed to a minute and a strong braking force can be obtained. .

The tangent force F _t received from the braked body 9 during braking is received through the bracket 8 and is not transmitted to the plate-like body 2 and the guide rod 4, so that the plate-like body 2 and the guide rod 2 are provided. 4 etc. can be made smaller and lighter. Furthermore, since it is possible to omit the conventional large block-shaped caliper, as a whole, it is possible to achieve a remarkable structural simplification and compactness, in particular, it can reduce the left-to-right dimension (thickness).

According to the first or second aspect of the present invention, the brake shoes 6, 7 are slidable / detachable, so that there is an advantage that repair / replacement / inspection is easy (by disassembly).

[Brief description of drawings]

FIG. 1 is a left side view for explaining the basic configuration of the present invention.
It is a reference drawing.

FIG. 2 is a front reference diagram.

FIG. 3 is a partial cross-sectional front reference diagram.

FIG. 4 is a front reference diagram of reference for the resilient support member.

FIG. 5 is a side reference diagram.

FIG. 6 is a reference diagram for explaining a cross section of a main part.

FIG. 7 is a main- portion cross-sectional view showing one embodiment of the present invention .

FIG. 8 is a perspective view of an elastic member according to the present invention .

FIG. 9 is a plan view of a brake shoe body.

FIG. 10 is a main-portion cross-sectional view showing another embodiment.

FIG. 11 is an explanatory diagram showing an example of a bracket.

[Explanation of symbols]

1 Electromagnet 2 Plate 6 Brake shoe 7 Brake shoe 8 Bracket 9 Braked body 17 Brake shoe body 19 Centering joint 21 Centering joint 20 Pressing member (shaft member) 22 Axial bolt 40 Pressing member (adjusting screw) 49 Hooking member 55 Shaft bolt 59 Control member 171 Storage section 174 Horizontal hole 191 (211) Fixed side member 193 (213) Movable side member 197 (217) Hole section 551 Bolt head F _t Tangent force S Swing slide contact surface section Q Flat surface slide contact surface section X elastic member

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16D 65/21 B66D 5/14 F16D 55/224 102 F16D 65/095

Claims (2)

(57) [Claims] 1. A bracket 8 for bearing a tangent force F _t acting on a pair of brake shoes 6, 7 that reciprocates in a direction of approaching and separating from each other by a pressing member 20, 40. Electromagnet part 1 and plate-like body 2
The pair of brake shoes 6 and 7 are disposed between the rear side flat portion and the movable side members 193 and 213 of the centripetal joints 19 and 21 so as to slide on a plane. The flat sliding contact surface portion Q and the swingable sliding contact surface portion S of the centripetal joints 19 and 21 are swingably supported with respect to the pressing members 20 and 40, and the pressing members. Resilient members X, X mounted on shaft bolts 22, 22 screwed to one end side of 20, 40
Is stored in the storage portions 171, 171 formed in the brake shoe main bodies 17, 17 with one end open, and by the elastic members X, X,
Fixed-side member 19 formed on one end side of the pressing members 20 and 40
1, 211 together with the movable side members 193, 213 are elastically attracted to the brake shoes 6, 7 so that the flat sliding contact surface portion Q and the oscillating sliding contact surface portion S are held in close contact with each other. And the brake shoes 6 and 7 to the shaft bolts 22 and 22.
On the other hand, a pad holding structure for a hoisting machine braking device, which is configured to be slidable and detachable. 2. A bracket 8 for bearing a tangent force F _t acting on a pair of brake shoes 6, 7 that reciprocates in a direction toward and away from the body 9 to be braked by pressing members 20, 40. Electromagnet part 1 and plate-like body 2
The pair of brake shoes 6 and 7 are disposed between the rear side flat portion and the movable side members 193 and 213 of the centripetal joints 19 and 21 so as to slide on a plane. The pushing member 20 is supported so as to be swingable with respect to the pressing members 20 and 40 via the plane sliding contact surface portion Q and the swinging sliding contact surface portion S of the centripetal joints 19 and 21. , 40 holes 197, 2
17, elastic members X, X arranged via shaft bolts 55, 55
As a result, the fixed-side members 191 and 211 formed on one end side of the pressing members 20 and 40 are elastically attracted to the brake shoes 6 and 7 together with the movable-side members 193 and 213, and the plane sliding contact is performed. The surface portion Q and the oscillating sliding contact surface portion S are held in close contact with each other, and the regulating members 59, 59 for regulating the brake shoes 6, 7 are detachably attached and formed on the brake shoes 6, 7. The brake shoes 6, 7 elastically supported by the bolt heads 551, 551 of the shaft bolts 55, 55 in the lateral holes 174, 174 that are open at one end are attached to the shaft bolts.
A pad holding structure for a hoisting machine braking device, which is configured to be slidable and detachable with respect to 55, 55.