JP2020133899A - Shoe head, brake device, cotter, and brake shoe attaching/detaching method - Google Patents

Abstract

To provide a shoe head capable of improving workability of an attachment/detachment work for a brake shoe, and also provide a brake device, a cotter and a brake shoe attaching/detaching method.SOLUTION: A cotter 12 is provided with a cotter engagement part 42 that can be inserted into a space S from below and arranged at a fixed position, can be pulled out downward toward a non-fixed position away from the fixed position, and is recessed or projected in a front-rear direction D1. A lock member is provided in a cotter arrangement part 15 so as to be movable back and forth in a width direction D3, and has: a lock engagement part 25 that engages the cotter engagement part 42 at the fixed position to fix the position of the cotter 12, and is disengaged from the cotter engagement part 42 when moved in the width direction D3; and an elastic member 26 that energizes the lock engagement part 25 in a direction of engaging the cotter engagement part 42.SELECTED DRAWING: Figure 3

Description

The present invention relates to a shoe head of a brake device for a railway vehicle, a brake device including the shoe head, a cotter, and a method of attaching and detaching a brake shoe.

Conventionally, there is known a tread brake device that is pressed against the tread of a wheel in a brake device for a railway vehicle. In such a tread brake device, the brake shoe is supported by the shoe head. The brake shoes wear because they are pressed against the treads of the rotating wheels. Therefore, the brake shoe is removed from the shoe head according to the wear condition, and a new brake shoe that is not worn is attached to the shoe head. However, such work of attaching and detaching the brake shoe is performed on the wheels, the shoe head, and the vehicle. It will be performed in a narrow space adjacent to the equipment provided on the bogie. Therefore, there is a demand for a brake shoe attachment / detachment structure suitable for such a work environment.

Such a brake shoe attachment / detachment structure is disclosed in, for example, Patent Document 1. In the invention described in Patent Document 1, the cotter can be slid and attached / detached by operating the operation portion within the range of forming the elongated hole of the shoe head.

JP-A-2018-12256

However, in the brake shoe attachment / detachment structure described in Patent Document 1, when the brake shoe is fixed to the shoe head, the cotter is operated from the width direction of the bogie, but the brake shoe still has the above-mentioned structure. There is a problem that the work space is narrow when performing the attachment / detachment work. Therefore, there is a desire to further facilitate the work of attaching and detaching the brake shoes.

Therefore, the present invention has been made to solve the above problems, and provides a shoe head, a brake device, a cotter, and a method for attaching / detaching a brake shoe, which can improve the workability of attaching / detaching a brake shoe.

The shoe head according to one aspect of the present invention is the brake shoe having a mounting hole extending in the vertical direction while projecting from the back surface of the brake shoe that can be pressed against the tread surface of the wheel of the trolley to the side opposite to the tread surface. With the shoe head main body supporting the mounting convex portion and the shoe head main body supporting the mounting convex portion, the brake shoe and the shoe head main body can be fixed at a fixed position arranged in the mounting hole. The shoe head main body is provided with a mounting recess in which the mounting convex portion can be arranged, and a cotter arrangement in which a space for arranging the cotter extending in the vertical direction communicating with the mounting recess is provided. It has a portion and a lock member provided in the cotter arranging portion to fix the position of the cotter at the fixed position, and is inserted into the cotter from the vertical direction and arranged at the fixed position. A cotter engaging portion that is possible and is provided so as to be able to be pulled out in the vertical direction toward a non-fixed position away from the fixed position, and is recessed or protrudes in the front-rear direction of the trolley that intersects the vertical direction. The lock member is provided in the cotter arrangement portion so as to be able to advance and retreat in the intersecting direction intersecting the vertical direction and the front-rear direction, and engages with the cotter engaging portion at the fixed position to engage with the cotter. The lock engaging portion that is fixed in position and disengaged from the cotter engaging portion when moved in the crossing direction, and the lock engaging portion are engaged in the direction of engaging the cotter engaging portion. It has an elastic member that biases toward it.

In such a shoe head, a cotter is inserted into the space from the vertical direction and can be arranged at a fixed position, and is provided so as to be able to be pulled out in the vertical direction toward a non-fixed position away from the fixed position. Therefore, when attaching / detaching the brake shoes, the cotter can be operated from the vertical direction of the bogie. If the cotter is inserted and removed from the vertical direction of the dolly, the cotter does not easily interfere with various devices provided on the dolly, and the brake shoe can be easily attached and detached. Further, the position of the cotter can be fixed by the lock engaging portion of the lock member in a state where the cotter is arranged at the fixed position for fixing the brake shoe and the shoe head main body. Therefore, the cotter does not fall off during running. Further, by moving the lock member in the intersecting direction against the urging force of the elastic member from the state where the cotter engaging portion and the lock engaging portion are engaged, the cotter engaging portion and the lock engaging portion are engaged with each other. It can be released, the cotter can be moved from the fixed position to the non-fixed position, and the brake shoe can be removed from the shoe head body.
When attaching the brake shoe to the shoe head body, insert the cotter into the space of the cotter placement part and place it in a fixed position, then release the lock member and the lock member will automatically move in the crossing direction due to the urging force of the elastic member. Then, the lock engaging portion engages with the cotter engaging portion, and the cotter can be fixed at the fixed position.
By using the elastic member in this way, when fixing the brake shoe to the shoe head body, it is not necessary for the operator to move (push or pull) the lock member in the crossing direction.

Further, in the shoe head, the lock member may further have a restricting member that regulates the movement of the lock engaging portion with respect to the cotter arrangement portion.

By providing such a regulating member, it is possible to regulate the movement of the lock engaging portion due to vibration or the like during traveling. Therefore, it is possible to prevent the cotter from shifting from the fixed position during traveling.

Further, in the shoe head, the cotter engaging portion is arranged at a position deviated from the first engaging portion and the first engaging portion in the vertical direction and the intersecting direction. The lock engaging portion is capable of engaging with the first engaging portion at the fixed position to fix the position of the cotter, and the second engaging portion at the non-fixed position. The cotter can be supported by engaging with the locking member at a position where the lock engaging portion engages with the first engaging portion and the locking member engages with the second engaging portion. The movement of the lock engaging portion may be restricted at the fitted position.

In this way, the cotter engaging portion has the first engaging portion and the second engaging portion provided apart from each other in the vertical direction, and the first engaging portion and the second engaging portion intersect in the intersecting direction. It is provided at a position shifted to. Therefore, when the lock member is moved in the crossing direction from the state where the cotter is in the fixed position and the lock engaging portion is engaged with the first engaging portion, the cotter can be moved to the non-fixed position. When the cotter is in the non-fixed position, the second engaging portion and the lock engaging portion are engaged, and the movement of the lock engaging portion is regulated by the regulating member, so that the cotter is supported in the non-fixed position. .. Therefore, when the brake shoe is removed from the shoe head body, the cotter does not fall off from the cotter arrangement portion. That is, since the brake shoe can be removed from the shoe head body without completely removing the cotter from the cotter arrangement portion, the work of attaching and detaching the brake shoe can be further facilitated.

Further, in the shoe head, the cotter engaging portion is arranged at a position where the first engaging portion and the first engaging portion are displaced in the vertical direction and at a position where they overlap when viewed from the vertical direction. With the second engaging portion, the lock engaging portion can engage with the first engaging portion at the fixed position to fix the position of the cotter, and at the non-fixed position. The cotter may be supported by engaging with the second engaging portion.

The lock member is moved in the crossing direction against the urging force of the elastic member, the engagement between the first engaging portion and the lock engaging portion is released at the fixed position, and the cotter is pulled out from the space of the cotter arrangement portion. Operate and move to a non-fixed position. Before the cotter is placed in the non-fixed position, the locking member moves in the crossing direction by the urging force of the elastic member and returns to the original position. Since the second engaging portion is provided at a position where it overlaps with the first engaging portion when viewed from the vertical direction, the second engaging portion engages with the lock engaging portion when the lock member returns to the original position. The cotter is supported in a non-fixed position. Therefore, when the brake shoe is removed from the shoe head body, the cotter does not fall off from the cotter arrangement portion. Since the brake shoe can be removed from the shoe head body without completely removing the cotter from the cotter arrangement portion in this way, the work of attaching and detaching the brake shoe can be further facilitated.

Further, in the shoe head, the cotter engaging portion has a first engaging portion, and the first engaging portion has an upper surface and a lower surface capable of engaging with the lock engaging portion at the fixed position. One surface of the upper surface and the other surface of the lower surface including an inclined surface inclined downward from one of the intersecting directions toward the other, and the lock engaging portion is the first surface. One surface of the upper surface and the lower surface capable of engaging with the one surface of the one engaging portion and fixing the position of the cotter, and an inclined surface inclined downward from one of the intersecting directions toward the other. The upper surface including the inclined surface of the first engaging portion may have an upper surface and the other surface of the lower surface that can be contacted from the vertical direction.

When the cotter is inserted upward (or downward) into the space of the cotter arrangement portion from the state where the first engaging portion is below (or above) the lock engaging portion, the other of the first engaging portion including the inclined surface is inserted. The other surface of the lock engaging portion, including the inclined surface, comes into contact with the surface. If the cotter is further moved upward (or downward) in this state, the inclined surface of the first engaging portion moves relative to each other in the intersecting direction while contacting the inclined surface of the lock engaging portion. At this time, the inclined surface of the first engaging portion pushes the inclined surface of the lock engaging portion, and the lock member moves toward the other side in the crossing direction against the urging force of the elastic member. After that, when the first engaging portion is arranged above (or below) the lock engaging portion so that the other surface of the first engaging portion gets over the lock engaging portion, it is locked by the urging force of the elastic member. By moving the engaging portion to one side in the crossing direction so as to return to the original position, one surface of the lock engaging portion supports one surface of the first engaging portion from below (or above). As a result, the lock engaging portion and the first engaging portion are engaged with each other to fix the cotter in a fixed position.
In this way, since the first engaging portion and the lock engaging portion have an inclined surface, the cotter is automatically fixed at the fixed position by the lock member only by moving the cotter from the non-fixed position to the fixed position, and the shoe head. The brake shoe can be fixed to the main body. Therefore, when the cotter is arranged at the fixed position, it is not necessary for the operator to move the lock member in the crossing direction in advance, and the work of attaching the brake shoe can be further facilitated.

Further, in the shoe head, the cotter engaging portion is arranged at a position deviated from the first engaging portion in the vertical direction and at a position overlapping the first engaging portion when viewed from the vertical direction. The lock engaging portion may be able to engage with the second engaging portion at the non-fixed position to support the cotter.

The lock member is moved in the crossing direction against the urging force of the elastic member, the engagement between the first engaging portion and the lock engaging portion is released at the fixed position, and the cotter is pulled out from the space of the cotter arrangement portion. Operate and move to a non-fixed position. Before the cotter is placed in the non-fixed position, the locking member moves in the crossing direction by the urging force of the elastic member and returns to the original position. Since the second engaging portion is provided at a position where it overlaps with the first engaging portion when viewed from the vertical direction, the second engaging portion engages with the lock engaging portion when the lock member returns to the original position. The cotter is supported in a non-fixed position. Therefore, when the brake shoe is removed from the shoe head body, the cotter does not fall off from the cotter arrangement portion. Since the brake shoe can be removed from the shoe head body without completely removing the cotter from the cotter arrangement portion in this way, the work of attaching and detaching the brake shoe can be further facilitated.

Further, in the shoe head, the second engaging portion has one surface of an upper surface and a lower surface including an inclined surface that inclines downward from one of the intersecting directions toward the other, and the lock engaging portion. The one surface of the joint includes an inclined surface that inclines downward from one of the intersecting directions toward the other, and contacts the one surface of the second engaging portion from above and below at the non-fixed position. It may be possible.

When the lock engaging part is engaged with the second engaging part and the cotter is supported in a non-fixed position, and then the cotter is pulled downward (or upward), the lock engages on the inclined surface of the second engaging part. One surface of the second engaging portion and one surface of the lock engaging portion move relative to each other in the intersecting direction while the inclined surfaces of the joint portion come into contact with each other. At this time, the inclined surface of the lock engaging portion pushes the inclined surface of the second engaging portion, and the lock member moves in one direction in the crossing direction against the urging force of the elastic member. After that, when the lock engaging portion is placed above (or below) the second engaging portion so that the lock engaging portion gets over one surface of the second engaging portion, the second engaging portion and the lock engaging portion are connected to each other. The engagement is released. After that, the locking engaging portion moves to the other side in the crossing direction due to the urging force of the elastic member, and returns to the original position. Then, the cotter can be moved further downward (or upward) from the non-fixed position and pulled out from the space of the cotter arrangement portion.
Since the second engaging portion and the lock engaging portion have an inclined surface in this way, the engagement between the second engaging portion and the lock engaging portion is automatically released only by pulling out the cotter. The cotter can be easily removed from the shoe head body.

Further, in the shoe head, the length dimension of the cotter may be set so that the lower end of the cotter is arranged above the position where the tread is in contact with the track at the non-fixed position. ..

When inserting and removing the cotter downward, the lower end of the cotter is arranged above the track in the non-fixed position. Therefore, when the operator inserts the cotter upward toward the space of the cotter arranging portion and arranges the cotter at the fixed position, the work can be performed without interfering with the track, and the workability can be improved.

Further, in the shoe head, the lock member may be provided below the mounting recess.

By providing the lock member below the mounting recess, the operator can easily access the lock member, and the operator can easily move the lock member in the crossing direction.

Further, the shoe head is attached to the shoe head body in a direction away from the fixed position in the vertical direction so that the cotter placed in the cotter arrangement portion cannot be removed from the shoe head body. A movement restricting portion for restricting the movement of the cotter is further provided, and the movement restricting portion is formed at a position closer to the tip of the cotter than the cotter engaging portion, and the lock engaging portion is attached to the cotter engaging portion. The lock engaging portion is engaged with the cotter engaging portion so as to engage with the cotter regulating portion formed on the shoe head body and the cotter regulating portion that is recessed or protrudes in the engaging direction. It may have a shoe head restricting portion that protrudes or is recessed in the direction.

By fitting the cotter regulating portion and the shoe head regulating portion, it is possible to prevent the cotter from falling off from the shoe head body even when the cotter is not fixed to the shoe head body. .. As a result, it is possible to prevent the cotter from being separated from the shoe head when the brake shoe is removed or attached to the shoe head. Therefore, it is not necessary to separately manage the cotter during work, and workability can be improved.

Further, the shoe head has a cotter that urges the cotter in the front-rear direction so as to bring the cotter into contact with at least one of the shoe head main body and the brake shoe while the cotter is arranged in the cotter arrangement portion. It may be further equipped with a force unit.

The cotter urging portion allows the cotter to come into contact with at least one of the shoe head body and the brake shoe, thereby suppressing rattling of the cotter with respect to the shoe head body. Therefore, it is possible to suppress abnormal noise when braking the wheels.

Further, the brake device according to one aspect of the present invention includes the shoe head and a brake shoe supported by the shoe head body in the shoe head.

In such a brake device, by providing the above shoe head, the cotter can be inserted and removed from the vertical direction of the bogie, the cotter does not easily interfere with various devices provided on the bogie, and the work of attaching and detaching the brake shoe becomes easy.
Furthermore, by using an elastic member for the lock member, the lock member automatically moves in the crossing direction by the urging force of the elastic member, the lock engaging portion engages with the cotter engaging portion, and the cotter is fixed at the fixed position. it can. Therefore, when fixing the brake shoe to the shoe head body, it is not necessary to move (push or pull) the lock member in the crossing direction in order to move the cotter.

Further, the cotter according to one aspect of the present invention is the brake shoe having a mounting hole extending in the vertical direction while projecting from the back surface of the brake shoe that can be pressed against the tread surface of the wheel of the trolley to the side opposite to the tread surface. A cotter capable of fixing the brake shoe and the shoe head body at a fixed position arranged in the mounting hole in a state where the shoe head body supporting the mounting convex portion in the above supports the mounting convex portion. The mounting recess in which the mounting protrusion can be arranged and a space extending in the vertical direction communicating with the mounting recess are inserted into the space of the cotter arrangement portion in the shoe head main body from the vertical direction. A cotter that can be arranged at a fixed position and is provided so as to be able to be pulled out in the vertical direction toward a non-fixed position away from the fixed position, and is recessed or protrudes in the front-rear direction of the carriage that intersects the vertical direction. An engaging portion is provided and is provided in the cotter arrangement portion so as to be able to advance and retreat in an intersecting direction intersecting the vertical direction and the front-rear direction, and engages with the cotter engaging portion at the fixed position to move in the intersecting direction. A lock having a lock engaging portion that is disengaged from the cotter engaging portion when the wheel is engaged, and an elastic member that urges the lock engaging portion in a direction in which the lock engaging portion is engaged with the cotter engaging portion. It is fixed at the fixed position by the member.

Further, in the method of attaching / detaching the brake shoe according to one aspect of the present invention, a mounting hole extending in the vertical direction is provided while projecting from the back surface of the brake shoe that can be pressed against the tread surface of the wheel of the trolley to the side opposite to the tread surface. In a state where the mounting convex portion of the brake shoe is arranged in the mounting recess provided in the shoe head body, the space for arranging the cotter in the shoe head body extending in the vertical direction communicating with the mounting recess is provided. A mounting step in which the cotter is inserted from the vertical direction, the cotter is moved to a fixed position where the cotter is arranged between the mounting hole and the space, and the brake shoe is fixedly attached to the shoe head body. And a removal step of moving the cotter to a non-fixed position where the cotter is arranged outside the mounting hole by pulling out the cotter in the vertical direction in the space. With the cotter arranged at the fixed position, the lock engaging portion provided in the space with respect to the cotter engaging portion that is recessed or protrudes in the front-rear direction of the trolley that intersects in the vertical direction in the cotter. The cotter is fixed at the fixed position by moving the cotter in the crossing direction intersecting the vertical direction and the front-rear direction by the urging force of the elastic member, and resists the urging force in the removing step. After moving the lock engaging portion in the crossing direction so that the lock engaging portion is separated from the cotter engaging portion, the cotter is moved from the fixed position to the non-fixed position.

In such a method of attaching / detaching the brake shoe, the cotter can be inserted / removed from the vertical direction of the bogie, the cotter does not easily interfere with various devices provided on the bogie, and the work of attaching / detaching the brake shoe becomes easy.
Furthermore, by using an elastic member for the lock member, the lock member automatically moves in the crossing direction by the urging force of the elastic member, the lock engaging portion engages with the cotter engaging portion, and the cotter is fixed at the fixed position. it can. Therefore, when fixing the brake shoe to the shoe head body, it is not necessary to move (push or pull) the lock member in the crossing direction in order to move the cotter.

According to the method for attaching / detaching the shoe head, the brake device, the cotter, and the brake shoe, the workability of attaching / detaching the brake shoe can be improved.

It is an overall view of the brake device which concerns on 1st Embodiment of this invention. It is an enlarged view of the main part which saw the shoe head in the brake device which concerns on 1st Embodiment of this invention from the side surface side in the width direction. It is a figure which looked at the lock member of the shoe head in the brake device which concerns on 1st Embodiment of this invention from the bottom, and is the AA sectional view of FIG. It is an overall view of the cotter of the shoe head in the brake device which concerns on 1st Embodiment of this invention as seen from the rear. It is an overall view which saw the cotter of the shoe head in the brake device which concerns on 1st Embodiment of this invention from the side surface side in the width direction. It is a simplified view of the cotter and the lock member of the shoe head in the brake device which concerns on 2nd Embodiment of this invention seen from the front, and is the figure which shows the state which the cotter is arranged in a fixed position. It is a simplified view which looked at the cotter and the lock member of the shoe head in the brake device which concerns on 2nd Embodiment of this invention from the front, and is the figure which shows the state which the cotter is arranged in the non-fixed position. It is a figure which looked at the lock member of the shoe head in the brake device which concerns on 2nd Embodiment of this invention from the lower side, and is the state which the lock engaging part was engaged with the 1st engaging part in the state which the cotter was in a fixed position. It is a figure which shows. It is the figure which looked at the lock member of the shoe head in the brake device which concerns on 2nd Embodiment of this invention from the lower side, and the lock engaging part engaged with the 2nd engaging part in the state which the cotter was in the non-fixed position. It is a figure which shows the state. It is a schematic overall view of the brake device which concerns on 2nd Embodiment of this invention, and is an overall view which shows the state which the cotter is arranged in the non-fixed position. It is a simplified view which looked at the cotter and the lock member of the shoe head in the brake device which concerns on 3rd Embodiment of this invention from the front, and is the figure which shows the state which the cotter is arranged below the fixed position. It is a simplified view which looked at the cotter and the lock member of the shoe head in the brake device which concerns on 3rd Embodiment of this invention from the front, and is the figure which shows the state which the cotter is closer to a fixed position than FIG. It is a simplified view which looked at the cotter and the lock member of the shoe head in the brake device which concerns on 4th Embodiment of this invention from the front, and is the figure which shows the state which the cotter is arranged below the non-fixed position. It is an enlarged view of the main part which looked at the shoe head in the brake device which concerns on 5th Embodiment of this invention from the back side in the front-rear direction. FIG. 5 is an enlarged cross-sectional view of a main part of the shoe head of the brake device according to the fifth embodiment of the present invention as viewed from the side surface side in the width direction. FIG. 5 is an enlarged cross-sectional view of a main part of a shoe head in a brake device according to a modification of the present invention as viewed from the side surface side in the width direction.

[First Embodiment]
Hereinafter, the brake device 110 according to the first embodiment of the present invention will be described.
The brake device 110 is a so-called unit brake (tread brake), and is a device that applies a frictional force to the tread 100a of the wheel 100 in a bogie provided at the lower part of the vehicle body of a railroad vehicle to brake the wheel 100. Is. The tread surface 100a is a surface provided outside the flange 100b in the width direction of the bogie and in contact with the track (rail) 105.
Specifically, as shown in FIG. 1, the brake device 110 includes a brake shoe 1 that can come into contact with the tread surface 100a, a shoe head 3 that supports the brake shoe 1, and a brake body 4 that operates the shoe head 3. There is.

The brake shoe 1 includes, for example, an ordinary cast iron shoe made of cast iron, an alloy cast iron shoe to which manganese or chromium is added, a synthetic shoe obtained by mixing metal powder or graphite with a synthetic resin and heat-shaping, iron powder, copper, graphite, etc. A sintered alloy shoe obtained by pressure-shaping a mixture such as a metal oxide and sintering it is used. The brake shoe 1 has a curved shape along the shape of the tread surface 100a.

Further, the brake shoe 1 is provided with a mounting convex portion 2 protruding from the back surface 1a on the side opposite to the side pressed against the tread surface 100a. The mounting convex portion 2 is provided with a mounting hole 2a extending along the tangential direction of the wheel 100. The mounting hole 2a is formed so as to penetrate the mounting convex portion 2. In this embodiment, the mounting hole 2a extends in the vertical direction D2. The vertical direction D2 indicates the vertical direction in a railway vehicle.

The brake main body 4 has a push rod 7 extending in the front-rear direction D1 along the traveling direction of the bogie, and a housing 8 for supporting the push rod 7 in the front-rear direction D1 so as to be able to move forward and backward. One end of a bar-shaped hanger 9 is pin-coupled to the tip of the push rod 7. Here, the other end of the hanger 9 is pin-coupled to the tip of the arm 10 projecting upward from the housing 8.

The shoe head 3 is pin-coupled to the end of the push rod 7 together with one end of the hanger 9 to support the brake shoe 1. Then, the shoe head 3 can apply a braking force to the wheel 100 by pressing the brake shoe 1 against the tread surface 100a of the wheel 100 by advancing and retreating the push rod 7.
Hereinafter, the direction in which the brake shoe 1 is pressed against the tread 100a is defined as the front of the front-rear direction D1, and the direction in which the brake shoe 1 retracts from the tread 100a of the wheel 100 is defined as the rear of the front-rear direction D1. The front and rear do not necessarily correspond to the front and rear in the traveling direction of the vehicle. Further, in the following, the width direction of the bogie that intersects the vertical direction D2 and the front-rear direction D1 is simply the width direction (intersection direction) D3.

The shoe head 3 includes a shoe head main body 11 that supports the brake shoe 1, and a cotter 12 that can fix the brake shoe 1 and the shoe head main body 11.

As shown in FIGS. 2 and 3, the shoe head main body 11 has a bottom plate portion 16 having an facing surface 16a facing the back surface 1a of the brake shoe 1, and a pair of side plate portions 18 provided on the bottom plate portion 16. It includes a cotter arranging portion 15 on which the cotter 12 can be arranged, and a lock member 23 provided on the cotter arranging portion 15 to fix the position of the cotter 12.

In the bottom plate portion 16 of the cotter arrangement portion 15, the facing surface 16a has a shape curved along the shape of the tread surface 100a and along the shape of the back surface 1a of the brake shoe 1. Further, the bottom plate portion 16 is manufactured by casting, for example, and then the details are formed by machining.

The side plate portion 18 of the cotter arrangement portion 15 is provided integrally with the bottom plate portion 16 so as to rise from both edges of the facing surface 16a of the bottom plate portion 16 in the width direction D3 in a direction away from the brake shoe 1. A push rod 7 is connected to the side plate portion 18 at the central portion in the vertical direction D2.

Here, the shoe head main body 11 is provided with a mounting recess 20 that is recessed from the facing surface 16a to the middle position of the side plate portion 18 in the central portion in the vertical direction D2. As a result, the mounting recess 20 communicates with the space S surrounded by the bottom plate portion 16 and the pair of side plate portions 18. This space S is a space S that communicates with the mounting recess 20 and extends from the mounting recess 20 to both sides in the vertical direction D2 and opens downward. A cotter 12 described later is arranged in this space S. The mounting convex portion 2 of the brake shoe 1 is inserted and arranged in the mounting recess 20. In the state where the mounting convex portion 2 is arranged in the mounting concave portion 20, the space S and the mounting hole 2a communicate with each other in the vertical direction D2.

The lock member 23 is an elastic member interposed between the bar-shaped lock body 24 arranged in the space S, the lock engaging portion 25 provided in the lock body 24, and the lock body 24 and the cotter arrangement portion 15. It has 26 and a regulating member 27 that regulates the movement of the lock body 24. Although the lock member 23 is provided below the mounting recess 20, the lock member 23 may be provided above the mounting recess 20. Further, the regulating member 27 does not necessarily have to be provided.

As shown in FIG. 3, the lock main body 24 has a round bar shape centered on the axis O extending in the width direction D3. Here, the cross-sectional shape of the lock main body 24 is not limited to the case of the present embodiment, and the lock main body 24 may have a square bar shape. The lock body 24 is inserted into a through hole 18a that penetrates a pair of side plate portions 18 of the cotter arrangement portion 15 in the width direction D3. The lock main body 24 is integrally provided with a base end portion 28 having the same shape as the head of the hexagonal bolt adjacent to the side plate portion 18 arranged outside the space S and outside the width direction D3.

Further, the lock main body 24 is integrally provided with a tip portion 29 which is a double nut adjacent to the side plate portion 18 arranged inside the width direction D3 on the outside of the space S. The lock main body 24 is provided so as to be able to advance and retreat in the direction of the axis O, that is, in the width direction D3 with respect to the cotter arrangement portion 15 in a state where the pair of side plate portions 18 are penetrated in the width direction D3.

The lock engaging portion 25 is a rectangular convex portion arranged in the space S and projecting forward from the outer peripheral surface of the lock main body 24 in the radial direction. As shown in FIG. 3, a pair of lock engaging portions 25 are provided apart from each other in the width direction D3. Further, a regulation convex portion 30 is provided inside the width direction D3 of the lock engaging portions 25, that is, on the tip 29 side of the lock main body 24 with respect to the pair of lock engaging portions 25. Like the lock engaging portion 25, the regulation convex portion 30 also projects forward radially outward from the outer peripheral surface of the lock main body 24. When the lock main body 24 moves in the width direction D3, the regulation convex portion 30 moves in the width direction D3 along the groove 15a formed in the cotter arrangement portion 15, so that the axis O of the lock main body 24 O. It has a function to regulate the rotation around.

As shown in FIG. 3, a first lock recess 32 is formed between the pair of lock engaging portions 25 so as to be recessed rearward. Further, a second lock recess 33 is formed between the lock engaging portion 25 and the regulation convex portion 30 so as to be recessed rearward.

The elastic member 26 is provided between the tip portion 29 of the lock main body 24 and the inner side plate portion 18 in the width direction D3. More specifically, the elastic member 26 is a coil spring provided between a cylindrical pedestal 37 embedded in a surface of the side plate portion 18 facing the width direction D3 and a tip portion 29. An urging force is applied to the elastic member 26 in a direction of pressing the base end portion 28 of the lock main body 24 against the side plate portion 18 in a state where no external force acts. The elastic member 26 may be provided with an initial pressure in a pulled state in a state where the base end portion 28 of the lock main body 24 is in contact with the side plate portion 18 outside the width direction D3. Further, the elastic member 26 is not limited to the coil spring, and may be any member that can apply an urging force to the lock member 23.

As shown in FIGS. 2 and 3, the regulating member 27 is, for example, a plunger. The regulating member 27 regulates the rotational operation of the lock body 24 around the axis O and the advancing / retreating operation in the width direction D3. The regulating member 27 is provided by being screwed into a hole 18b formed in the side plate portion 18 outside the width direction D3 and opening in the through hole 18a. Further, the tip of the regulating member 27 can protrude into the through hole 18a, and by being inserted into the hole 24a that is radially inwardly recessed from the outer peripheral surface of the lock body 24, the regulating member 27 is inserted into the hole 24a of the lock body 24. It is possible to regulate the movement. As shown in FIG. 3, the hole 24a of the lock main body 24 is provided at a position close to the base end portion 28.

As shown in FIGS. 4 and 5, the cotter 12 has a plate-shaped cotter main body 40 and a widening portion 41 provided at the lower end of the cotter main body 40.
The cotter body 40 is inserted into the space S in the cotter arranging portion 15 from below, is arranged in the space S, and is provided so as to be able to be extracted downward from the space S.

The cotter body 40 is arranged with its surface facing the front-rear direction D1. As shown in FIGS. 2 to 5, the cotter main body 40 is provided with a cotter engaging portion 42 so as to project rearward from a surface facing rearward. The cotter engaging portion 42 is a part of the vertical direction D2 on the surface of the cotter main body 40, and both end portions including both end edges in the width direction D3 so as to project from the surface of the cotter main body 40 at the same position in the vertical direction D2. It is a pair of rectangular convex portions formed. Therefore, the cotter body 40 has a thicker wall thickness in the front-rear direction D1 at the position where the cotter engaging portion 42 is provided. Further, the tip (upper end) of the cotter body 40 has a shape that tapers in the width direction D3 and the front-rear direction D1.

A lock engaging portion 25 corresponding to the width direction D3 can be engaged with each cotter engaging portion 42. That is, in a state where the base end portion 28 of the lock main body 24 is in contact with the side plate portion 18, the position where one cotter engaging portion 42 corresponds to the one lock engaging portion 25 and the width direction D3 (the position overlapping the vertical direction D2). ), And the other cotter engaging portion 42 is arranged at a position corresponding to the other lock engaging portion 25 and the width direction D3 (a position overlapping the vertical direction D2).

With the cotter body 40 inserted into the space S of the cotter arranging portion 15, the cotter engaging portion 42 contacts the lock engaging portion 25 from above and lock engages with the cotter engaging portion 42 as shown in FIG. The fixed position of the cotter 12 is a position where the portion 25 can be engaged. In this fixed position, the cotter body 40 is arranged in the mounting hole 2a of the mounting convex portion 2 of the brake shoe 1 and extends above the mounting convex portion 2. At the fixed position, the cotter engaging portion 42 contacts the lock engaging portion 25 from above and the lock engaging portion 25 and the cotter engaging portion 42 engage with each other, so that the position of the cotter 12 is fixed at the fixed position. ..

When the cotter body 40 is arranged below the fixed position, the lock engaging portion 25 and the cotter engaging portion 42 do not engage with each other. That is, the position where the cotter engaging portion 42 is arranged below the lock engaging portion 25 and the lock engaging portion 25 and the cotter engaging portion 42 cannot be engaged is set as the non-fixed position of the cotter 12. In this non-fixed position, the cotter 12 can move in the vertical direction D2.
Here, the width dimension of each cotter engaging portion 42 is smaller than the dimension of the width direction D3 of the first lock recess 32 and the second lock recess 33, and each cotter engaging portion 42 is the first lock recess. It is possible to pass through 32 and the second lock recess 33. Therefore, when the cotter 12 is moved from the fixed position to the non-fixed position, the cotter 12 can be moved in the vertical direction D2 without interference between the cotter engaging portion 42 and the lock engaging portion 25.

The widening portion 41 has a block shape having a larger dimension in the width direction D3 than the cotter main body 40. The widening portion 41 projects slightly rearward from the surface of the cotter body 40. Therefore, as shown in FIG. 4, the cotter 12 has a T shape when viewed from the front-rear direction D1. The widening portion 41 may have any other shape as long as it can be gripped by the operator when the cotter body 40 is operated in the vertical direction D2. Further, the widening portion 41 does not necessarily have to be provided. The cotter 12 may be formed so as to form an L shape when the cotter 12 is viewed from the width direction D3 by bending or bending the lower end portion of the cotter body 40 in the front-rear direction D1 without providing the widening portion 41.

In the brake device 110 of the present embodiment described above, since the shoe head 3 is provided, the cotter 12 can be inserted into the space S from below and can be arranged at a fixed position, and is not separated from the fixed position. It is provided so that it can be pulled out downward toward the fixed position. Therefore, when attaching / detaching the brake shoe 1, the cotter 12 can be operated from below the carriage. If the cotter 12 is inserted and removed from below the trolley, the cotter 12 is less likely to interfere with various devices provided on the trolley, and the brake shoe 1 can be easily attached and detached.

Further, the position of the cotter 12 can be fixed by the lock engaging portion 25 in the lock member 23 in a state where the cotter 12 is arranged at the fixed position where the brake shoe 1 and the shoe head main body 11 are fixed. Therefore, the cotter 12 does not fall off during traveling. Further, from the state where the cotter engaging portion 42 and the lock engaging portion 25 are engaged, the tip portion 29 of the lock member 23 is pushed against the urging force of the elastic member 26, and the lock member 23 is moved in the width direction D3. , The engagement between the cotter engaging portion 42 and the lock engaging portion 25 can be released. As a result, the cotter 12 can be moved from the fixed position to the non-fixed position, and the brake shoe 1 can be removed from the shoe head main body 11 (removal step).

When attaching the brake shoe 1 to the shoe head main body 11, the cotter 12 is inserted into the space S of the cotter arrangement portion 15 and arranged at a fixed position, and then the tip portion 29 is stopped and the lock member 23 is released. The locking member 23 automatically moves in the width direction D3 by the urging force of the elastic member 26, the lock engaging portion 25 engages with the cotter engaging portion 42, and the cotter 12 can be fixed at the fixed position (mounting step).

By using the elastic member 26 in this way, when fixing the brake shoe 1 to the shoe head main body 11, it is not necessary for the operator to push the lock member 23 and move it in the width direction D3. Therefore, it is possible to improve the workability of the work of attaching and detaching the brake shoe 1.

Further, by providing the locking member 27 on the lock member 23, it is possible to regulate the movement of the lock engaging portion 25 due to vibration or the like during traveling. Therefore, it is possible to reduce the possibility that the cotter engaging portion 42 and the lock engaging portion 25 are arbitrarily disengaged during traveling, and it is possible to prevent the cotter 12 from being displaced from the fixed position.

Here, the cotter engaging portion 42 may be a concave portion instead of a convex portion. In this case, the cotter engaging portion 42, which is a recess so that the lock body 24 can move in the width direction D3, needs to be formed so as to be recessed from the surface of the cotter body 40 over the entire area in the width direction D3.

[Second Embodiment]
Next, the brake device 110A of the second embodiment of the present invention will be described. In the second embodiment described below, the same parts as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted.
In the brake device 110A of the present embodiment, the cotter main body 40 is provided with a cotter engaging portion 50 different from that of the first embodiment. As shown in FIGS. 6 and 7, the cotter engaging portion 50 has a first engaging portion 51 and a second engaging portion 52 provided above the first engaging portion 51. ..

The first engaging portion 51 is a part of the vertical direction D2 on the surface of the cotter main body 40, and is formed so as to protrude from the surface of the cotter main body 40 at the same position in the vertical direction D2 apart from the width direction D3. It is a rectangular convex part. Therefore, the cotter body 40 has a thick wall thickness in the front-rear direction D1 at the position where the first engaging portion 51 is provided. With the cotter 12 arranged at the fixed position, the first engaging portion 51 comes into contact with the lock engaging portion 25 from above, and the lock engaging portion 25 can be engaged with the first engaging portion 51. There is. The dimension of the first engaging portion 51 in the width direction D3 is smaller than the dimension of the width direction D3 of the first lock recess 32 and the dimension in the direction of the second lock recess 33, and each of the first engaging portions 51 It is possible to pass through the first lock recess 32 and the second lock recess 33.

The second engaging portion 52 has the same shape as the first engaging portion 51, and is a part of the vertical direction D2 on the surface of the cotter main body 40, and is separated from the width direction D3 and at the same position in the vertical direction D2. A pair of rectangular protrusions formed so as to protrude from the surface of 40. Each of the second engaging portions 52 is provided at a position deviated from each of the first engaging portions 51 in the width direction D3. In the present embodiment, one second engaging portion 52 is provided between the pair of first engaging portions 51 in the width direction D3, and the other second engaging portion 52 is formed from the pair of first engaging portions 51. Is provided on the base end 28 side of the lock body 24 which is outside the width direction D3.

As shown in FIG. 7, in a state where the cotter 12 is arranged below the fixed position and is arranged in the non-fixed position, the second engaging portion 52 comes into contact with the lock engaging portion 25 from above, and the second engaging portion 52 (2) The lock engaging portion 25 can be engaged with the engaging portion 52.

As shown in FIGS. 8 and 9, the lock main body 24 is provided with a pair of holes 24a that are radially inwardly recessed inward from the outer peripheral surface of the lock main body 24 in the width direction D3.
As shown in FIG. 8, when the lock engaging portion 25 is engaged with the first engaging portion 51 at a fixed position, the lock engaging portion 25 is provided on the base end portion 28 side of the lock member 23 which is inside in the width direction D3. The tip of the regulating member 27 is inserted into the hole 24a. Further, as shown in FIG. 9, when the lock engaging portion 25 is engaged with the second engaging portion 52 at a non-fixed position, the lock engaging portion 25 is provided on the tip 29 side of the lock main body 24 which is outside the width direction D3. The tip of the regulating member 27 is inserted into the hole 24a.

Further, as shown in FIG. 10, the length dimension of the cotter 12 is set so that the lower end of the cotter 12 is arranged above the position where the tread surface 100a is in contact with the track 105 at the non-fixed position. That is, in a state where the cotter 12 is arranged at a non-fixed position, the distance L2 in the vertical direction D2 from the upper end of the cotter 12 to the track 105 is set to be larger than the length dimension L1 of the cotter 12. ..

According to the brake device 110A of the present embodiment described above, the cotter engaging portion 50 has a first engaging portion 51 and a second engaging portion 52 provided apart from each other in the vertical direction D2. The first engaging portion 51 and the second engaging portion 52 are provided at positions displaced in the width direction D3.

Here, from the state where the cotter 12 is arranged at a fixed position and the lock engaging portion 25 is engaged with the first engaging portion 51, the tip portion 29 of the lock member 23 is pushed to move the lock member 23 to the outside of the width direction D3. When one first engaging portion 51 is arranged at the position of the first locking recess 32 and the other first engaging portion 51 is arranged at the position of the second locking recess 33, the cotter 12 is placed in a non-fixed position. It becomes possible to move downward toward. When the cotter 12 is in the non-fixed position, the second engaging portion 52 and the lock engaging portion 25 are engaged with each other, and the movement of the lock engaging portion 25 is restricted by the restricting member 27 so that the lock engaging portion 25 is placed in the non-fixed position. The cotter 12 is supported.

Therefore, when the brake shoe 1 is removed from the shoe head main body 11, the cotter 12 does not fall off from the cotter arrangement portion 15. That is, since the brake shoe 1 can be removed from the shoe head main body 11 without completely removing the cotter 12 from the cotter arrangement portion 15, the work of attaching and detaching the brake shoe 1 can be further facilitated.

Further, in the non-fixed position, the lower end of the cotter 12 is arranged above the track 105. Therefore, when the operator inserts the cotter 12 upward toward the space S of the cotter arranging portion 15 and arranges the cotter 12 at a fixed position, the work can be performed without interfering with the track 105, improving workability. it can.

In the present embodiment, the first engaging portion 51 and the second engaging portion 52 may be provided at overlapping positions when viewed from the vertical direction D2. The overlapping position when viewed from the vertical direction D2 is not only a position that completely coincides with the width direction D3, but also a part of the second engaging portion 52 is arranged at the same position in the first engaging portion 51 and the width direction D3. Including the case. In this case, it is not necessary to regulate the movement of the lock engaging portion 25 by the regulating member 27 at the non-fixed position. That is, for example, the hole 24a for restricting the movement of the lock engaging portion 25 at the non-fixed position may not be provided.

[Third Embodiment]
Next, the brake device 110B of the third embodiment of the present invention will be described. In the second embodiment described below, the same parts as those in the first embodiment and the second embodiment will be described with the same reference numerals, and duplicate description will be omitted.

As shown in FIGS. 11 and 12, the cotter engaging portion 60 has a first engaging portion 61 and a second engaging portion 62 provided above the first engaging portion 61. ..

The first engaging portion 61 is a part of the vertical direction D2 on the surface of the cotter main body 40, and is formed so as to protrude from the surface of the cotter main body 40 at the same position in the vertical direction D2 apart from the width direction D3. It is a convex part. Therefore, the cotter body 40 has a thicker wall thickness in the front-rear direction D1 at the position where the cotter engaging portion 42 is provided. The first engaging portion 61 has a flat lower surface 61a orthogonal to the vertical direction D2 and downward from one side of the width direction D3 (inside the width direction D3) toward the other side of the width direction D3 (outside the width direction D3). It has an upper surface 61b including an inclined surface that is inclined to. As a result, the first engaging portion 61 has a triangular shape when viewed from the front-rear direction D1.

The second engaging portion 62 is above the first engaging portion 61, at a part of the vertical direction D2 on the surface of the cotter main body 40, separated from the width direction D3 and at the same position in the vertical direction D2 from the surface of the cotter main body 40. It is a pair of convex portions formed so as to protrude. Therefore, the cotter body 40 has a thicker wall thickness in the front-rear direction D1 at the position where the cotter engaging portion 42 is provided. Each of the second engaging portions 62 is provided at a position where it overlaps with each of the first engaging portions 61 when viewed from D2 in the vertical direction. The overlapping position when viewed from the vertical direction D2 is not only a position that completely coincides with the width direction D3, but also a part of the second engaging portion 62 is arranged at the same position in the first engaging portion 61 and the width direction D3. Including the case. The second engaging portion 62 has a flat lower surface 62a and an upper surface 62b orthogonal to the vertical direction D2.

The lock engaging portion 65 has a flat lower surface 65a orthogonal to the vertical direction D2 and downward from one side of the width direction D3 (inside the width direction D3) toward the other side of the width direction D3 (outside the width direction D3). It has an upper surface 65b including an inclined surface to be inclined. The dimension of the width direction D3 of each first engaging portion 61 is smaller than the dimension of the width direction D3 of the first lock recess 32 and the dimension in the direction of the second lock recess 33, and each first engaging portion 61 can pass through the first lock recess 32 and the second lock recess 33.

With the cotter 12 arranged at a fixed position, the lower surface 61a of the first engaging portion 61 comes into contact with the upper surface 65b of the lock engaging portion 65 from above, and the first engaging portion 61 is brought into contact with the lock engaging portion 65. It is possible to engage with.

In the brake device 110B of the present embodiment described above, when the cotter 12 is inserted upward into the space S of the cotter arrangement portion 15 from the state where the first engaging portion 61 is below the lock engaging portion 65, an inclined surface is formed. The lower surface 65a of the lock engaging portion 65 including the inclined surface comes into contact with the upper surface 61b of the first engaging portion 61 including the above. When the cotter 12 is further moved upward in this state, the upper surface 61b of the first engaging portion 61 moves relative to the inside of the width direction D3 while contacting the lower surface 65a of the lock engaging portion 65 as shown in FIG. .. At this time, the upper surface 61b of the first engaging portion 61 pushes the lower surface 65a of the lock engaging portion 65, and the lock main body 24 moves toward the outside in the width direction D3 against the urging force of the elastic member 26.

After that, when the upper surface 61b of the first engaging portion 61 is placed above the lock engaging portion 65 so as to get over the lock engaging portion 65, the urging force of the elastic member 26 causes the first engaging portion 61 to be placed above the lock engaging portion 65. By moving the lock body 64 inward in the width direction D3 so as to return to the original position, the upper surface 65b of the lock engaging portion 65 comes into contact with the lower surface 61a of the first engaging portion 61, and the lock engaging portion 65 Supports the first engaging portion 61 from below. As a result, the lock engaging portion 65 and the first engaging portion 61 can be engaged with each other to fix the cotter 12 at a fixed position.

In this way, since the first engaging portion 61 and the lock engaging portion 65 have an inclined surface, the lock main body 24 is operated only by moving the cotter 12 from the non-fixed position to the fixed position, and the lock member 23 operates. The cotter 12 can be automatically fixed at a fixed position, and the brake shoe 1 can be fixed to the shoe head body 11. Therefore, when the cotter 12 is arranged at the fixed position, it is not necessary for the operator to move the lock body 24 in advance in the width direction D3, and the work of attaching the brake shoe 1 can be further facilitated.

Further, the lock body 24 is pushed and moved to the outside in the width direction D3 against the urging force of the elastic member 26 to release the engagement between the first engaging portion 61 and the lock engaging portion 65 at the fixed position, and the cotter 12 Is operated so as to be pulled downward from the space S of the cotter arrangement portion 15 to move it to a non-fixed position. If the pressing of the lock body 24 is stopped before the cotter 12 is arranged in the non-fixed position, the lock body 24 moves inward in the width direction D3 by the urging force of the elastic member 26 and returns to the original position.

In the present embodiment, since the second engaging portion 62 is provided at a position where it overlaps with the first engaging portion 61 in the vertical direction D2, the second engaging portion 62 is locked by returning the lock body 24 to the original position. The cotter 12 is supported at a non-fixed position by engaging with the engaging portion 65. Therefore, when the brake shoe 1 is removed from the shoe head main body 11, the cotter 12 does not fall off from the cotter arrangement portion 15. Therefore, the brake shoe 1 can be removed from the shoe head main body 11 without completely removing the cotter 12 from the cotter arrangement portion 15, so that the work of attaching and detaching the brake shoe 1 can be further facilitated.

Here, in the present embodiment, the second engaging portion 62 does not necessarily have to be provided.

[Fourth Embodiment]
Next, the brake device 110C according to the fourth embodiment of the present invention will be described. In the second embodiment described below, the same parts as those in the first to third embodiments are designated by the same reference numerals, and duplicate description will be omitted.

As shown in FIG. 13, the shapes of the second engaging portion 72 and the lock engaging portion 75 are different from those of the third embodiment.
The second engaging portion 72 has a lower surface 72a including an inclined surface that inclines downward from one side of the width direction D3 (inside the width direction D3) toward the other side of the width direction D3 (outside the width direction D3), and the vertical direction. It has a flat upper surface 72b orthogonal to D2.

The lock engaging portion 75 includes a lower surface 75a including an inclined surface that inclines downward from one side of the width direction D3 (inside the width direction D3) toward the other side of the width direction D3 (outside the width direction D3), and the width direction D3. It has an upper surface 75b including an inclined surface that inclines downward from one side (inside the width direction D3) toward the other side in the width direction D3 (outside the width direction D3). Further, the upper surface 75b also includes a plane that is continuous with the inclined surface and extends from the inclined surface to one of the width directions D3 and is orthogonal to the vertical direction D2. Therefore, each lock engaging portion 75 has a trapezoidal shape when viewed from the front-rear direction D1.

With the cotter 12 arranged at a fixed position, the lower surface 61a of the first engaging portion 61 comes into contact with the upper surface 75b of the lock engaging portion 75 from above, and the lock engaging portion 75 comes into contact with the first engaging portion 61. Can be engaged.
Further, with the cotter 12 arranged in the non-fixed position, the lower surface 72a of the second engaging portion 72 comes into contact with the upper surface 75b of the lock engaging portion 75 from above, and lock engages with the second engaging portion 72. The portion 75 can be engaged.

Further, in the present embodiment, a gap is provided between the side plate portion 18 and the base end portion 28 in a state where no external force acts on the elastic member 26, and the lock main body 24 can be moved on both sides in the width direction D3. .. An elastic member may also be provided in the gap between the side plate portion 18 and the base end portion 28.

In the brake device 110C of the present embodiment described above, the cotter 12 is further pulled downward from the state where the lock engaging portion 75 is engaged with the second engaging portion 72 and the cotter 12 is supported at the non-fixed position. As shown in FIG. 13, the lower surface 72a of the second engaging portion 72 and the lock engaging portion 75 while the upper surface 75b of the lock engaging portion 75 is in contact with the lower surface 72a of the second engaging portion 72 including the inclined surface. 75b and the upper surface 75b of the above move relative to each other in the width direction D3. At this time, the upper surface 75b of the lock engaging portion 75 pushes the lower surface 72a of the second engaging portion 72, and the lock main body 24 moves inward in the width direction D3 against the urging force of the elastic member 26. After that, when the lower surface 72a of the second engaging portion 72 is arranged above the second engaging portion 72 so that the lock engaging portion 75 gets over the lower surface 72a, the second engaging portion 72 and the lock engaging portion 75 become The engagement is released. After that, the lock engaging portion 75 moves to the outside in the width direction D3 by the urging force of the elastic member 26, and returns to the original position.

Then, the cotter 12 can be moved further downward from the non-fixed position and pulled out from the space S of the cotter arrangement portion 15. Therefore, since the second engaging portion 72 and the lock engaging portion 75 have an inclined surface, only the operation of pulling out the cotter 12 downward is performed, and the second engaging portion 72 and the lock engaging portion 75 are automatically engaged with each other. The case can be released, and the cotter 12 can be easily removed from the shoe head main body 11.

[Fifth Embodiment]
Next, the brake device 110E according to the fifth embodiment of the present invention will be described. In the fifth embodiment described below, the same parts as those in the first to fourth embodiments are designated by the same reference numerals, and duplicate description will be omitted. The brake device 110E of the present embodiment is different from that of the above-described embodiment in that the cotter urging unit 80 and the movement restricting unit 90 are further provided.

As shown in FIGS. 14 and 15, the cotter urging portion 80 urges the cotter 12 in the front-rear direction D1 so as to bring the cotter 12 into contact with the bottom plate portion 16 in a state where the cotter 12 is arranged in the cotter arranging portion 15. There is. The cotter urging portion 80 of the present embodiment has an urging portion main body 81 and an urging fixing portion 82.

The urging portion main body 81 is a member that urges the cotter main body 40 in the front-rear direction D1 by an elastic force. The urging portion main body 81 of the present embodiment is a curved leaf spring. The base end (one end of the vertical direction D2) of the urging portion main body 81 is fixed to the bottom plate portion 16 by the urging fixing portion 82. The urging fixing portion 82 is a fixing member such as a hexagon bolt. The urging portion main body 81 extends away from the bottom plate portion 16 as it is separated from the urging fixing portion 82 in the vertical direction D2. That is, the tip of the urging portion main body 81 (the other end of the vertical direction D2) forms a gap in the front-rear direction D1 with the bottom plate portion 16. The tip of the urging portion main body 81 is arranged at a position where it can come into contact with the tip of the cotter main body 40 in a state where the cotter main body 40 is arranged in the cotter main body 15. The tip of the urging portion main body 81 can contact the cotter main body 40 from the rear in the front-rear direction D1. Therefore, the urging portion main body 81 urges the cotter 12 toward the front in the front-rear direction D1 by contacting the cotter main body 40 from the rear in the front-rear direction D1 and makes contact with the bottom plate portion 16.

The movement restricting unit 90 regulates the movement of the cotter 12 with respect to the shoe head main body 11 so that the cotter 12 arranged in the cotter arranging unit 15 cannot fall off. Specifically, the movement regulation unit 90 regulates the movement of the cotter 12 with respect to the shoe head body 11 in the vertical direction D2 in a direction away from the fixed position. That is, the cotter 12 is prevented from falling off from the shoe head main body 11 when it is arranged in the cotter arrangement unit 15 by the movement restricting unit 90. The movement regulation unit 90 of the present embodiment has a cotter regulation unit 91 and a shoe head regulation unit 92. The cotter regulation unit 91 and the shoe head regulation unit 92 regulate the movement by fitting each other like a key and a key groove.

The cotter regulation unit 91 is integrally formed with the cotter main body 40. The cotter regulating portion 91 is formed at a position closer to the tip of the cotter main body 40 than the cotter engaging portion 42 in the vertical direction D2. The cotter regulation unit 91 of the present embodiment is formed at a position slightly distant from the end surface of the cotter body 40 in the vertical direction D2. The cotter regulating portion 91 is formed near the center of the cotter main body 40 in the width direction D3. The cotter regulating portion 91 projects in a rectangular shape from the surface of the cotter main body 40 facing forward in the front-rear direction D1. That is, the cotter regulating portion 91 projects toward the front in the front-rear direction D1, which is the direction in which the lock engaging portion 25 is engaged with the cotter engaging portion 42. The cotter regulating portion 91 is located above the mounting hole 2a in the vertical direction D2 in a state where the cotter 12 is fixed by the lock member 23. The cotter regulation unit 91 is formed as a key with respect to the cotter main body 40.

The shoe head regulation portion 92 is formed on the bottom plate portion 16. The shoe head regulating portion 92 is formed so as to sandwich the mounting recess 20 when viewed from the front-rear direction D1. The shoe head regulation portion 92 is recessed from the bottom plate portion 16 so as to engage the cotter regulation portion 91. Specifically, the shoe head regulation unit 92 is recessed in a shape capable of sliding the cotter regulation unit 91 in the vertical direction D2 while maintaining the position in the width direction D3. The shoe head regulation portion 92 is formed as a key groove corresponding to the cotter regulation portion 91 with respect to the bottom plate portion 16.

The shoe head regulation portion 92 of the present embodiment includes an upper recess 921 located above the mounting recess 20 in the vertical direction D2, and a lower recess 922 located below the mounting recess 20 in the vertical direction D2. Have.

The upper recess 921 is a groove formed in the bottom plate portion 16. The upper recess 921 is formed larger than the cotter regulating portion 91 so that the cotter regulating portion 91 fits inside. The upper recess 921 is formed to be slightly larger than the cotter regulating portion 91 so that the cotter regulating portion 91 does not tilt in the width direction D3. The upper recess 921 is formed so as not to hinder the movement of the cotter regulating portion 91 in the vertical direction D2 in the vertical direction D2. The lower end of the upper recess 921 in the vertical direction D2 communicates with the mounting recess 20.

The upper concave portion 921 has a first tapered portion 925 formed at a position (lower end in the vertical direction D2) connected to the mounting concave portion 20. The first tapered portion 925 has a flat surface that is inclined so as to become deeper as it approaches the mounting recess 20 in the front-rear direction D1. The first tapered portion 925 has a flat surface that is inclined so as to expand as it approaches the mounting recess 20 in the width direction D3.

The lower recess 922 is a groove formed in the bottom plate portion 16. The lower recess 922 is formed larger than the cotter regulating portion 91 so that the cotter regulating portion 91 fits inside. The lower recess 922 is formed to have the same size as the upper recess 921 in the width direction D3. The lower recess 922 is formed so as to be movable in the vertical direction D2 to a position where the cotter 12 is detached from the mounting recess 20 and a position where the cotter 12 does not fall off from the shoe head body 11 when viewed from the front-rear direction D1. Has been done. Specifically, the lower end of the lower recess 922 in the vertical direction D2 is arranged at a position where the cotter body 40 does not overlap with the mounting recess 20 when viewed from the front-rear direction D1 (the tip of the cotter body 40 is mounted). It comes into contact with the lower end of the cotter regulating portion 91 in the vertical direction D2 in a state of being located below the concave portion 20 in the vertical direction D2). Therefore, when the lower end of the lower recess 922 in the vertical direction D2 and the lower end of the cotter regulating portion 91 in the vertical direction D2 are in contact with each other, the tip of the cotter body 40 is below the mounting recess 20 in the vertical direction D2. positioned. As a result, the lower recess 922 restricts the downward movement of the cotter 12 in the vertical direction D2. Further, the upper end of the lower recess 922 in the vertical direction D2 communicates with the mounting recess 20.

The lower concave portion 922 has a second tapered portion 926 formed at a position (upper end in the vertical direction D2) connected to the mounting concave portion 20. The second tapered portion 926 has a shape symmetrical to that of the first tapered portion 925 with the mounting recess 20 interposed therebetween. That is, the second tapered portion 926 has a flat surface that is inclined so as to become deeper as it approaches the mounting recess 20 in the front-rear direction D1. The second tapered portion 926 has a flat surface that is inclined so as to expand as it approaches the mounting recess 20 in the width direction D3.

According to such a configuration, by inserting the tip of the cotter main body 40 into the gap between the urging portion main body 81 and the bottom plate portion 16, the cotter main body 40 is directed to the front in the front-rear direction D1 by the urging portion main body 81. Is pressed. As a result, the cotter regulating portion 91 integrally formed with the cotter main body 40 and the upper concave portion 921 formed by being recessed from the bottom plate portion 16 come into contact with each other. As a result, rattling of the cotter 12 with respect to the shoe head body 11 in the front-rear direction D1 can be suppressed without using a fixing member such as a bolt that generates a new attachment work. Therefore, it is possible to suppress abnormal noise when braking the wheel 100.

Further, in the state where the cotter main body 40 is arranged in the cotter arranging portion 15, the cotter main body 40 moves in a state where the cotter regulating portion 91 is contained in the upper concave portion 921 or the lower concave portion 922. As a result, the cotter body 40 is moved in the vertical direction D2 while using the upper recess 921 and the lower recess 922 as guides. Further, even when the cotter regulation portion 91 protrudes from the upper recess 921 and the lower recess 922 into the mounting recess 20, the upper recess 921 and the lower recess of the cotter regulation portion 91 are provided by the first taper portion 925 and the second taper portion 926. The approach to 922 is guided. Therefore, the movement of the cotter body 40 in the vertical direction D2 is not impaired.

Further, when the brake shoe 1 is attached / detached, the cotter body 12 is pulled out from the mounting hole 2a of the mounting convex portion 2 in a state where the cotter 12 is released from the lock engaging portion 25. Is moved downward in the vertical direction D2. At that time, the lower end of the lower concave portion 922 in the vertical direction D2 and the lower end of the cotter regulating portion 91 in the vertical direction D2 come into contact with each other. In a state where the lower recess 922 and the cotter regulating portion 91 are in contact with each other, the tip of the cotter body 40 is located below the mounting recess 20 in the vertical direction D2. That is, the mounting recess 20 is opened, and the brake shoe 1 can be attached and detached. Further, when the lower recess 922 and the cotter regulating portion 91 come into contact with each other, the cotter main body 40 sandwiched between the bottom plate portion 16 and the lock main body 24 in the front-rear direction D1 faces downward in the vertical direction D2 from that position. You will not be able to move. Therefore, it is possible to prevent the cotter 12 from falling off from the shoe head body 11. As a result, it is possible to prevent the cotter 12 from being separated from the shoe head 3 when the brake shoe 1 is removed or attached to the shoe head 3. Therefore, it is not necessary to separately manage the cotter 12 during work, and workability can be improved.

The movement control unit 90 is not limited to the structure as in the present embodiment. That is, the movement regulation unit 90 is not limited to a structure in which the cotter regulation unit 91 protrudes and the shoe head regulation unit 92 is recessed. The cotter regulation unit 91 and the shoe head regulation unit 92 may have a structure that fits each other. Therefore, the structure may be such that the cotter regulating portion 91 is recessed and the shoe head regulating portion 92 is projected.

Further, the cotter urging portion 80 is not limited to a structure that urges the cotter 12 to come into contact with the bottom plate portion 16 as in the present embodiment. The cotter urging portion 80 may have a structure capable of urging the cotter 12 in the front-rear direction D1 so as to make contact with at least one of the shoe head main body 11 and the brake shoe 1. For example, as shown in the modified example of FIG. 16, the cotter urging portion 80A has a structure in which the cotter main body 81A urges the cotter 12 to the rear in the front-rear direction D1 to bring it into contact with the mounting convex portion 2. There may be.

Further, the cotter urging portion 80 is not limited to a structure in which the cotter 12 is urged by a leaf spring like the urging portion main body 81 of the present embodiment. The cotter urging portion 80 may urge the cotter 12 so as to come into contact with at least one of the shoe head main body 11 and the brake shoe 1. Therefore, the cotter urging portion 80 may be a member that urges the cotter 12 by an elastic force based on a shape such as a spring spring, and urges the cotter 12 by an elastic force based on the material such as a rubber material. It may be a member.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the configurations and combinations thereof in the respective embodiments are examples, and the configurations are added or omitted within a range not deviating from the gist of the present invention. , Replacement, and other changes are possible. Moreover, the present invention is not limited by the embodiment, but only by the scope of claims.

For example, the cotter 12 may be inserted and removed from above in the space S of the cotter arrangement portion 15.
Further, the lock main body 24 may be movable in a direction inclined with respect to the width direction D3 with respect to the cotter arrangement portion 15. That is, the direction of the axis O does not have to completely coincide with the width direction D3.

Further, not only when the lock body 24 can be moved in the width direction D3 by pushing the lock body 24, but also when the lock body 24 can be moved in the width direction D3 by pulling the lock body 24. Further, the base end portion 28 and the tip end portion 29 may be provided in the opposite directions.

The cotter arranging portion 15 is not limited to the shape having the side plate portion 18 and the bottom plate portion 16, and is not limited to the above-mentioned shape if there is a space S in which the cotter 12 is arranged.

Further, the configurations described in the embodiment and each modification may be combined as appropriate.

1 Brake shoe 1a Back surface 2 Mounting convex part 2a Mounting hole 3 Shoe head 4 Brake body 7 Push rod 8 Housing 9 Hanger 10 Arm 11 Shoe head body 12 Cotta 15 Cotta placement part 16 Bottom plate part 16a Facing surface 18 Side plate part 15a Groove 18a Penetration Hole 18b Hole 20 Mounting recess 23 Lock member 24 Lock body 24a Hole 25, 65, 75 Lock engagement part 26 Elastic member 27 Regulator member 28 Base end 29 Tip 30 Regulator convex 32 First lock recess 33 Second lock recess 37 Pedestal 40 Cotta body 41 Widening part 42, 50, 60 Cotta engaging part 51, 61 First engaging part 52, 62, 72 Second engaging part 80, 80A Cotta urging part 81, 81A Bending part main body 82 Brake fixing part 90 Movement regulation part 91 Cotta regulation part 92 Shoe head regulation part 921 Upper recess 922 Lower recess 925 First taper 926 Second taper 100 Wheel 100a Tread 100b Flange 110, 110A, 110B, 110C, 110E Brake Device 105 Orbit S Space O Axis D1 Front-back direction D2 Vertical direction D3 Width direction

Claims (14)

A shoe head body that projects from the back surface of the brake shoe that can be pressed against the tread surface of the wheel of the bogie to the side opposite to the tread surface and supports the mounting convex portion of the brake shoe that is provided with a mounting hole extending in the vertical direction.
A cotter capable of fixing the brake shoe and the shoe head body at a fixed position arranged in the mounting hole while the shoe head body supports the mounting convex portion.
With
The shoe head body
A mounting recess in which the mounting convex portion can be arranged, and a cotter arranging portion provided with a space for arranging the cotter extending in the vertical direction communicating with the mounting recess.
A lock member provided in the cotter arrangement portion and fixing the position of the cotter at the fixed position,
Have,
The cotter is provided so as to be inserted into the space from the vertical direction and arranged at the fixed position, and can be pulled out in the vertical direction toward a non-fixed position away from the fixed position. A cotter engaging portion is provided that is recessed or protrudes in the front-rear direction of the carriage that intersects with.
The lock member is
The cotter arrangement portion is provided so as to be able to advance and retreat in the crossing direction intersecting the vertical direction and the front-rear direction, and engages with the cotter engaging portion at the fixed position to fix the position of the cotter and fix the position of the cotter. A lock engaging portion that is disengaged from the cotter engaging portion when it is moved to
An elastic member that urges the lock engaging portion in a direction of engaging with the cotter engaging portion.
Shoe head with. The shoe head according to claim 1, wherein the lock member further includes a regulating member that regulates the movement of the lock engaging portion with respect to the cotter arranging portion. The cotter engaging portion is
First engaging part and
The first engaging portion includes a second engaging portion arranged at positions deviated from each other in the vertical direction and the intersecting direction.
Have,
The lock engaging portion can engage with the first engaging portion at the fixed position to fix the position of the cotter, and engage with the second engaging portion at the non-fixed position to fix the cotter. Can be supported,
The restricting member regulates the movement of the lock engaging portion at a position where the lock engaging portion engages with the first engaging portion and at a position where the lock member engages with the second engaging portion. The shoe head according to claim 2. The cotter engaging portion is
First engaging part and
The first engaging portion and the second engaging portion arranged at positions displaced in the vertical direction and at overlapping positions when viewed from the vertical direction.
Have,
The lock engaging portion can engage with the first engaging portion at the fixed position to fix the position of the cotter, and engage with the second engaging portion at the non-fixed position to fix the cotter. The shoe head according to claim 1 or 2, wherein the shoe head can be supported. The cotter engaging portion has a first engaging portion and has a first engaging portion.
The first engaging portion is
Of the upper surface and the lower surface including one surface of the upper surface and the lower surface capable of engaging with the lock engaging portion at the fixed position and an inclined surface inclined downward from one of the intersecting directions toward the other. On the other side,
Have,
The lock engaging portion is
One surface of the upper surface and the lower surface capable of engaging with the one surface of the first engaging portion and fixing the position of the cotter, and
The other of the upper surface and the lower surface that includes an inclined surface that inclines downward from one of the intersecting directions toward the other and that can contact the other surface including the inclined surface of the first engaging portion from the vertical direction. Face and
The shoe head according to claim 1 or 2. The cotter engaging portion further has a second engaging portion arranged at a position deviated from the first engaging portion in the vertical direction and at a position overlapping the first engaging portion when viewed from the vertical direction.
The shoe head according to claim 5, wherein the lock engaging portion can engage with the second engaging portion at the non-fixed position to support the cotter. The second engaging portion has one surface of an upper surface and a lower surface including an inclined surface that inclines downward from one of the intersecting directions toward the other.
The one surface of the lock engaging portion includes an inclined surface that inclines downward from one of the crossing directions toward the other, and at the non-fixed position, the one surface of the second engaging portion is the same. The shoe head according to claim 6, which can be contacted from the vertical direction. Claims 3, 4, 6, and 7 in which the length dimension of the cotter is set so that the lower end of the cotter is arranged above the position where the tread is in contact with the track in the non-fixed position. The shoe head according to any one of the above. The shoe head according to any one of claims 1 to 8, wherein the lock member is provided below the mounting recess. Movement that regulates the movement of the cotter with respect to the shoe head body in a direction away from the fixed position in the vertical direction so that the cotter placed in the cotter arrangement portion cannot be removed from the shoe head body. With more regulatory departments
The movement regulation department
A cotter regulating portion formed at a position closer to the tip of the cotter than the cotter engaging portion, and the lock engaging portion is recessed or protrudes in the direction of engaging with the cotter engaging portion.
A claim having a shoe head restricting portion formed on the shoe head body and having a shoe head restricting portion that protrudes or is recessed in a direction in which the lock engaging portion engages with the cotter engaging portion so as to engage with the cotter restricting portion. The shoe head according to any one of 1 to 9. Claim 1 further includes a cotter urging portion that urges the cotter in the front-rear direction so as to bring the cotter into contact with at least one of the shoe head main body and the brake shoe while the cotter is arranged in the cotter arranging portion. The shoe head according to any one of 10 to 10. The shoe head according to any one of claims 1 to 11.
A brake shoe supported by the shoe head body in the shoe head,
Brake device with. The shoe head body that supports the mounting convex portion of the brake shoe that protrudes from the back surface of the brake shoe that can be pressed against the tread surface of the wheel of the bogie to the side opposite to the tread surface and has a mounting hole that extends in the vertical direction is described above. A cotter capable of fixing the brake shoe and the shoe head body at a fixed position arranged in the mounting hole while supporting the mounting convex portion.
The mounting recess in which the mounting protrusion can be arranged and a space extending in the vertical direction communicating with the mounting recess are inserted into the space of the cotter arrangement portion in the shoe head main body from the vertical direction. A cotter that can be arranged at a fixed position and is provided so as to be able to be pulled out in the vertical direction toward a non-fixed position away from the fixed position, and is recessed or protrudes in the front-rear direction of the carriage that intersects the vertical direction. An engaging part is provided,
The cotter engagement portion is provided in the cotter arrangement portion so as to be able to advance and retreat in the crossing direction intersecting the vertical direction and the front-rear direction, and when the cotter engaging portion is engaged at the fixed position and moved in the crossing direction, the cotter engaging portion is engaged. Fixed at the fixed position by a lock engaging portion that is disengaged from the portion and a lock member having an elastic member that urges the lock engaging portion in a direction in which the lock engaging portion is engaged with the cotter engaging portion. Cotta to be done. The shoe head body is provided with a mounting protrusion on the brake shoe that projects from the back surface of the brake shoe that can be pressed against the tread surface of the wheel of the trolley to the side opposite to the tread surface and is provided with a mounting hole extending in the vertical direction. The cotter is inserted from the vertical direction into the space for arranging the cotter in the shoe head body that communicates with the mounting recess and extends in the vertical direction in the state of being arranged in the mounting recess. An attachment step in which the cotter is moved to a fixed position arranged between the space and the brake shoe is fixedly attached to the shoe head body.
A removal step of moving the cotter to a non-fixed position where the cotter is arranged outside the mounting hole by pulling out the cotter in the vertical direction in the space.
Including
In the mounting step, with the cotter arranged at the fixed position, the cotter is provided in the space with respect to a cotter engaging portion that is recessed or protrudes in the front-rear direction of the trolley that intersects in the vertical direction. The cotter is fixed at the fixed position by moving the locked engaging portion by the urging force of the elastic member in the crossing direction intersecting the vertical direction and the front-rear direction to engage the lock engaging portion.
In the removal step, the cotter is moved from the fixed position after the lock engaging portion is moved in the crossing direction so that the lock engaging portion is separated from the cotter engaging portion against the urging force. A method of attaching / detaching a brake shoe to be moved to the non-fixed position.

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