JP6399465B2 - Shoe head, cotter, brake device, and brake shoe attaching / detaching method - Google Patents

Description

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

  Conventionally, a tread brake device that is pressed against a tread surface of a wheel in a brake device for a railway vehicle is known. In such a tread brake device, the brake shoe is held by the shoe head. The brake shoe wears because it is pressed against the tread of the rotating wheel. Therefore, the brake shoe is removed from the shoe head according to the wear situation, and a new brake shoe that is not worn is attached to the shoe head. It is performed in a narrow space adjacent to equipment and the like provided on the vehicle carriage. Therefore, a brake shoe mounting structure suitable for such a work environment is required.

  Such a brake shoe mounting structure is disclosed in Patent Document 1, for example. Specifically, Patent Document 1 discloses that an L-shaped cotter having a bent portion is opened on a side surface of a shoe head in a state where a mounting portion protruding from a mounting surface of a brake shoe is disposed in a groove portion of the shoe head. A structure for inserting the shoe head and the brake shoe into the attachment portion from the attachment hole is described. In the invention described in Patent Document 1, the brake shoe is supported on the shoe head in this way.

JP 2007-292209 A

  However, in the brake shoe mounting structure disclosed in Patent Document 1, since the cotter having a bent portion is inserted into the shoe head and the mounting portion while rotating in the mounting hole, the mounting and dismounting operation of the brake shoe is very complicated.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a shoe head, a cotter, a brake device, and a brake shoe attaching / detaching method that can simplify the attaching / detaching operation of a brake shoe by easily moving the cotter.

A shoe head according to an aspect of the present invention is a mounting portion of a brake shoe that is pressed against a tread surface of a wheel and that has a mounting hole that protrudes from the back surface of the brake shoe to the opposite side of the tread surface and extends in the operation direction. A shoe head main body, and a cotter supported by the shoe head main body and capable of holding the brake shoe on the shoe head main body, wherein the mounting portion can be disposed on the shoe head main body. A recessed portion is provided, and a guide space extending in the operation direction communicating with the head recessed portion is provided, and the cotter is movable between a fixed position and an unfixed position in the operation direction in the guide space. The brake shoe is held by the shoe head body by being disposed between the mounting hole and the guide space at the fixed position. , In the unlocked position is located outside of the mounting hole, have a cotter body capable of providing the operation section, the shoe head body, said operating through in a direction perpendicular to the operating direction A long hole extending in the direction is provided, and the cotter body is operated between the fixed position and the non-fixed position within the long hole forming range via the operation portion arranged in the long hole. Operated in the direction.

  According to such a shoe head, the cotter body is moved in the guide space between the fixed position and the non-fixed position along the tangential direction of the wheel, so that the position of the cotter is changed and the brake shoe is moved at the fixed position. It can be held on the shoe head body. Accordingly, the brake shoe can be easily held on the shoe head by the cotter body only by moving the cotter body to the fixed position in the operation direction without complicatedly moving the cotter body. On the other hand, by moving the cotter body to the non-fixed position, the brake shoe can be easily brought into a state where it does not hold the shoe head, that is, a state where it can be detached from the brake shoe.

  In the above shoe head, the shoe head main body includes a bottom plate portion having a facing surface facing the back surface, a direction along a tangential direction of the wheel in the bottom plate portion, and a pressing direction in which the brake shoe is pressed. A pair of side plate portions provided on the bottom plate portion so as to rise in a direction away from the brake shoe from both edges in the width direction orthogonal to the The guide space may be a void portion surrounded by the bottom plate portion and the pair of side plate portions.

  In such a shoe head, since the guide space can be easily formed in the shoe head body, it is not necessary to bother to form a complicated shaped guide space in the shoe head body by using machining or the like, which reduces the processing cost. Can be reduced.

In the above shoe head and the side plate portion of the long hole extending in the operating direction through a direction perpendicular to the operation direction it may have been found provided.

  According to such a shoe head, since the operation part of the cotter is guided by the long hole, the cotter body can be easily slid and the brake shoe can be attached and detached. At this time, since the operation portion is operated within the long hole formation range, the movement of the cotter body can be stopped when the operation portion reaches the end of the long hole. That is, the cotter body can be positioned by the long hole. Therefore, even when it is difficult to confirm the position of the cotter body by visual observation or the like, the cotter body can be reliably moved between the fixed position and the non-fixed position.

  In the above shoe head, the cotter may further include an elastic member supported by the shoe head main body and capable of holding the cotter main body at the fixed position.

  According to such a shoe head, it is possible to restrict the cotter body at the fixed position from moving to the non-fixed position side when the arrangement position is not operated by the operation unit. Therefore, the cotter can be reliably positioned at the fixed position, and the brake shoe can be securely held by the shoe head body.

  In the above shoe head, the elastic member is a leaf spring disposed along the cotter body, and the elastic member extends along the operation direction and is supported by the shoe head body. A leaf spring main body portion and a pressing portion projecting from the leaf spring main body portion toward the cotter main body, and the cotter main body is provided with a cotter recess into which the pressing portion is inserted at the fixed position. It may be.

According to such a shoe head, the pressing portion of the leaf spring is inserted into the cotter recess at the fixed position, whereby the cotter body can be positioned at the fixed position. Further, since the pressing portion protrudes on the cotter body side, the elastic member can contact the cotter body at the non-fixed position, and an elastic force can be reliably applied from the leaf spring to the cotter. Therefore, rattling of the cotter body can be suppressed when the cotter moves from the non-fixed position to the fixed position. Further, when the elastic member tries to enter the cotter recess of the cotter body by its own elastic force, an appropriate texture can be obtained when the cotter moves from the non-fixed position to the fixed position. For this reason, it becomes easy to determine whether or not the cotter is surely disposed at the fixed position.
In addition, the shoe head according to one aspect of the present invention has a brake shoe pressed against the tread surface of the wheel, and has a mounting hole that protrudes from the back surface of the brake shoe to the opposite side of the tread surface and extends in the operation direction. A shoe head main body for holding the mounting portion; and a cotter supported by the shoe head main body and capable of holding the brake shoe on the shoe head main body. The mounting portion can be arranged on the shoe head main body. And a guide space extending in the operation direction communicating with the head recess, and the cotter is movable between a fixed position and an unfixed position in the operation direction in the guide space. And at the fixed position, the brake shoe is disposed on the shoe head body by being disposed between the mounting hole and the guide space. A cotter body disposed outside the mounting hole in the non-fixed position, the shoe head body having a bottom plate portion having a facing surface facing the back surface, and a tangent to the wheel in the bottom plate portion A pair of side plates provided on the bottom plate so as to rise from both edges in the direction along the direction and in the width direction orthogonal to the pressing direction to which the brake shoe is pressed, toward the direction away from the brake shoe; The head recess is formed so as to be recessed from the facing surface to the pair of side plate portions, and the guide space is a gap portion surrounded by the bottom plate portion and the pair of side plate portions, The cotter further includes an elastic member supported by the shoe head main body and capable of holding the cotter main body at the fixed position, and the elastic member extends along the cotter main body. The elastic member extends along the operation direction and protrudes toward the cotter main body from the plate spring main body supported by the shoe head main body and the leaf spring main body. The cotter body is provided with a cotter recess into which the pressing portion is inserted at the fixed position.

  In the above shoe head, the elastic member may be in a state in which the cotter main body is not applied to the shoe head main body by the pressing portion while the cotter main body is in the fixed position.

  According to such a shoe head, the elastic member does not apply an elastic force to the cotter at the fixed position. Therefore, by applying an elastic force to the cotter, the time it takes for the elastic member to be loaded can be made only while the cotter is placed at the non-fixed position, for example during maintenance, and the replacement life of the cotter can be extended. can do.

  In the above shoe head, the bottom surface of the bottom plate portion facing away from the facing surface in the pressing direction is on the non-fixed position side of the operation direction, and approaches the facing surface in the pressing direction. And a cotter protrusion protruding toward the bottom surface in the pressing direction on the non-fixed position side of the operation direction is formed on the cotter body, and at the fixed position, The cotter convex portion may be in contact with the operation direction.

According to such a shoe head, when the cotter body moves in the operation direction and is disposed at a fixed position, the cotter convex portion is caught by the step formed by the bottom concave portion, and movement in the operation direction is restricted. The Therefore, the cotter can be reliably positioned at the fixed position.
In addition, the shoe head according to one aspect of the present invention has a brake shoe pressed against the tread surface of the wheel, and has a mounting hole that protrudes from the back surface of the brake shoe to the opposite side of the tread surface and extends in the operation direction. A shoe head main body for holding the mounting portion; and a cotter supported by the shoe head main body and capable of holding the brake shoe on the shoe head main body. The mounting portion can be arranged on the shoe head main body. And a guide space extending in the operation direction communicating with the head recess, and a long hole extending in the operation direction through the shoe head body in a direction perpendicular to the operation direction. The cotter is movable in the operation direction between a fixed position and a non-fixed position in the guide space, and at the fixed position, The brake shoe is held by the shoe head body by being disposed between the mounting hole and the guide space, and the cotter body disposed outside the mounting hole at the non-fixed position, and the cotter body An operation portion that is provided integrally or screwably and is disposed in the elongated hole and is operated in the operation direction between a fixed position and a non-fixed position that are within a formation range of the elongated hole; The cotter body is operated in the operation direction by the operation portion between the fixed position and the non-fixed position which are within the long hole formation range.

Furthermore, the cotter according to one aspect of the present invention holds a mounting portion that protrudes from the back surface of the brake shoe pressed against the tread surface of the wheel to the opposite side of the tread surface and that has a mounting hole extending in the operation direction. A cotter provided on the shoe head main body and capable of holding the brake shoe on the shoe head main body, the cotter main body and the cotter main body being integrated or screwable so that the operation is performed on the shoe head main body. An operation portion that is disposed in a long hole that extends in the operation direction through the direction orthogonal to the direction, and is operated in the operation direction between a fixed position and a non-fixed position that are within the formation range of the long hole; has the cotter body Shuhe provided so as to extend in the operating direction to communicate with the head recess the mounting portion provided to be arranged in the shoe head body Is the fixed position to the operation direction in the guiding space of de body and said movable by the operating portion between a non locking position Rutotomoni, disposed over between the guide space and the mounting hole in the fixed position is held in the shoe head body said brake shoe by being, the unfixed position Ru is disposed outside of the mounting hole.

According to such a cotter, by moving the cotter body between the fixed position and the non-fixed position in the guide space, the position of the cotter can be changed and the brake shoe can be held on the shoe head body at the fixed position. . Accordingly, the brake shoe can be easily held on the shoe head by the cotter only by moving the cotter body to the fixed position in the operation direction without causing the cotter body to move in a complicated manner. On the other hand, by moving the cotter body to the non-fixed position, the brake shoe can easily be in a state where it does not hold the shoe head.
The cotter according to one aspect of the present invention holds an attachment portion that protrudes from the back surface of the brake shoe pressed against the tread surface of the wheel to the opposite side of the tread surface and that has an attachment hole extending in the operation direction. A cotter provided on the shoe head main body and capable of holding the brake shoe on the shoe head main body, and having a cotter main body capable of providing an operation portion, wherein the cotter main body includes the cotter main body. It is possible to move between a fixed position and a non-fixed position in the operation direction in the guide space of the shoe head body provided so as to extend in the operation direction by communicating with a head recess provided so that the mounting portion can be arranged. And the brake shoe is held in the shoe head body by being arranged between the mounting hole and the guide space at the fixed position. The operation portion disposed outside the mounting hole at the non-fixed position and disposed in a long hole provided in the shoe head body and penetrating in a direction perpendicular to the operation direction and extending in the operation direction. Thus, the operation is performed in the operation direction between the fixed position and the non-fixed position which are within the formation range of the long hole.

  Moreover, the brake device which concerns on 1 aspect of this invention is equipped with said shoe head and the brake shoe hold | maintained by the said shoe head main body in the said shoe head.

  According to such a brake device, by providing the shoe head, the brake shoe can be easily shoeed by the cotter only by moving the cotter body to the fixed position in the operation direction without complicatedly moving the cotter body in the guide space. It can be held by the head. On the other hand, by moving the cotter body to the non-fixed position, the brake shoe can easily be in a state where it does not hold the shoe head.

The brake shoe attaching / detaching method according to one aspect of the present invention includes an attachment in which an attachment hole is formed that protrudes from the rear surface of the brake shoe pressed against the tread surface of the wheel to the opposite side of the tread surface and extends in the operation direction. The cotter body disposed in the guide space that communicates with the head recess and extends in the operation direction is moved in the operation direction while the portion is disposed in the head recess provided in the shoe head body. Including a step of arranging the cotter body between the mounting hole and the guide space, or arranging the cotter body outside the mounting hole. In the arranging step, the cotter body is provided in the shoe head main body in the operation direction. between crossed through in the direction of the fixed positions becomes a range of the formation of the long hole extending in the operating direction and unlocked position, said cotter body is operated in the operating direction, before After being inserted the operation unit to the elongated hole by screwing operation portion cotter body, said cotter body in the step of the arrangement is operated in the operating direction.

According to such a method for attaching and detaching the brake shoe, when the brake shoe is attached, the brake shoe can be easily held on the shoe head by the cotter only by moving the cotter body to the fixed position. On the other hand, when the brake shoe is removed (replaced), the brake head is not easily held by the cotter by simply moving the cotter body to the non-fixed position .

  According to the above shoe head, cotter, brake device, and brake shoe attaching / detaching method, the cotter can be easily moved, and the attaching / detaching operation of the brake shoe can be simplified.

1 is a schematic overall view of a brake device according to a first embodiment of the present invention. FIG. 2 is an overall view of a shoe head and a brake shoe in a brake device according to an embodiment of the present invention, and is a view of a state in which a cotter is in a fixed position as viewed from the width direction. FIG. 2 is an overall view of a shoe head and a brake shoe in a brake device according to an embodiment of the present invention, and is a view of a state in which a cotter is in a fixed position as viewed from a pressing direction. FIG. 2 is an overall view of a shoe head and a brake shoe in a brake device according to an embodiment of the present invention, and is a view of a state in which a cotter is in a non-fixed position as viewed from the width direction. FIG. 2 is an overall view of a shoe head and a brake shoe in a brake device according to an embodiment of the present invention, and is a view of a state in which a cotter is in a non-fixed position as viewed from a pressing direction. It is the figure which expands and shows the cotter in the brake device which concerns on embodiment of this invention, Comprising: It is the figure which looked at the state which has a cotter in a fixed position from the width direction. It is a figure which expands and shows the cotter in the brake device which concerns on the 1st modification of embodiment of this invention, Comprising: It is the figure which looked at the state which has a cotter in a fixed position from the width direction. It is a figure which expands and shows the cotter in the brake device which concerns on the 2nd modification of embodiment of this invention, Comprising: It is the figure which looked at the state which has a cotter in a fixed position from the width direction. It is a figure which expands and shows the cotter in the brake device which concerns on the 3rd modification of embodiment of this invention, Comprising: It is the figure which looked at the state which has a cotter in a fixed position from the width direction. It is a figure which expands and shows the cotter in the brake device which concerns on the 4th modification of embodiment of this invention, Comprising: It is the figure which looked at the state which has a cotter in a fixed position from the width direction. It is a figure which expands and shows the cotter in the brake device which concerns on the 1st example of the 5th modification of embodiment of this invention, Comprising: It is a figure which shows the state which has a cotter in an unfixed position. Moreover, (a) is the figure seen from the pressing direction, (b) is the figure seen from the width direction. It is a figure which expands and shows the cotter in the brake device which concerns on the 2nd example of the 5th modification of embodiment of this invention, Comprising: It is a figure which shows the state which has a cotter in an unfixed position. Moreover, (a) is the figure seen from the pressing direction, (b) is the figure seen from the operation direction.

Hereinafter, the brake device 1 in the embodiment of the present invention will be described.
Embodiment
As shown in FIG. 1, the brake device 1 is a so-called unit brake (tread brake), and it frictions against a tread 101a of a wheel 101 of a carriage 100 provided at a lower part of a vehicle body (not shown) of a railway vehicle. A force is applied to brake the wheel 101.
Specifically, the brake device 1 includes a brake shoe 3 that can contact the tread surface 101 a of the wheel 101, a shoe head 2 that holds the brake shoe 3, and a brake body 4 that operates the shoe head 2.

The brake shoe 3 includes, for example, ordinary cast iron shoes made of cast iron, alloy cast iron shoes to which manganese or chromium is added, synthetic shoes in which metal powder or graphite is mixed with synthetic resin and heat shaped, iron powder, copper, graphite, A sintered alloy shoe or the like obtained by pressure-shaping a mixture of metal oxides and the like is used. The brake shoe 3 has a curved shape along the shape of the tread surface 101a.
Further, the brake shoe 3 is provided with a mounting portion 11 that protrudes from the back surface 10 on the side opposite to the side pressed against the tread surface 101a. The attachment portion 11 is provided with an attachment hole 12 extending along the tangential direction of the wheel 101. The attachment hole 12 is formed through the attachment portion 11. In the present embodiment, the attachment hole 12 extends in the vertical direction.

  In the brake body 4, the push rod 114 to which the shoe head 2 is connected is supported in the housing 112, and the push rod 114 can advance and retreat along the axis O. A first end portion of a bar-shaped hanger 111 is coupled to an end portion of the push rod 114 by a pin.

  Here, the second end of the hanger 111 is pin-coupled to the tip of the arm 113 protruding from the housing 112.

  The shoe head 2 is connected to the push rod 114 and holds the brake shoe 3. The shoe head 2 applies a braking force by pressing the brake shoe 3 against the tread surface 101a of the wheel 101 as the push rod 114 advances and retreats. Hereinafter, the advancing / retreating direction of the push bar 114 (direction along the axis O), that is, the advancing / retreating direction of the shoe head 2 is referred to as a pressing direction D1. The pressing direction D1 is a normal direction of the wheel 101, and is a direction along the front-rear direction of the traveling direction of the carriage 100 in the present embodiment.

More specifically, the shoe head 2 includes a shoe head main body 15 and a cotter 25 that slides in an operation direction D2 along a tangential direction (vertical direction) of the wheel 101.
As shown in FIGS. 2 to 5, the shoe head main body 15 has a bottom plate portion 16 having a facing surface 16 a facing the back surface 10 of the brake shoe 3, and a side plate portion 18 provided on the bottom plate portion 16. .

  In the bottom plate portion 16, the facing surface 16 a is curved along the shape of the tread surface 101 a, that is, along the shape of the back surface 10 of the brake shoe 3. Further, after the bottom plate portion 16 is manufactured by casting, for example, details are formed by machining.

  Further, the bottom plate portion 16 has a bottom surface 16b as a surface opposite to the facing surface 16a in the pressing direction D1. The bottom surface 16b is formed with a bottom recess 16c that is recessed in the pressing direction D1 toward the opposing surface 16a at both edges along the operation direction D2. Thereby, the dimension of the pressing direction D1 is small (thin) in the pressing direction D1 compared with the center part at the both ends of the operation direction D2. The bottom recess 16c is formed by machining when the shoe head body 15 is manufactured by casting, for example. For this reason, the casting surface is exposed at the bottom surface 16b at the position where the bottom recess 16c is not formed.

  The side plate portion 18 is formed integrally with the bottom plate portion 16 so as to rise in a direction away from the brake shoe 3 from both edge portions (both edge portions of the opposing surface 16a and the bottom surface 16b) on both sides in the width direction D3 of the bottom plate portion 16. Yes. That is, a pair of side plate portions 18 is provided. A push bar 114 of the brake device 1 is connected to the side plate portion 18 at the center portion in the operation direction D2.

  Only one side plate portion 18 is provided with a long hole 18a that penetrates the side plate portion 18 in the width direction D3 and extends in the operation direction D2. The long hole 18a is formed adjacent to the bottom surface 16b of the bottom plate portion 16, and in the present embodiment, the upper hole 18a is on the vehicle body side in the operation direction D2 with respect to the position where the push rod 114 of the brake body 4 is connected to the side plate portion 18. And is formed on the side plate portion 18.

Here, the shoe head body 15 is formed with a head recess 22 that is recessed from the opposing surface 16a to the midway position of the side plate portion 18 in the pressing direction D1 at the center portion in the operation direction D2. Accordingly, the head recess 22 communicates with a gap 23 surrounded by the bottom plate 16 and the pair of side plates 18. That is, the gap 23 is a guide space that communicates with the head recess 22 and extends on both sides in the operation direction D2. The mounting portion 11 of the brake shoe 3 is inserted and arranged in the head recess 22. In the state where the attachment portion 11 is disposed in the head recess 22, the gap portion 23 and the attachment hole 12 are connected in the operation direction D <b> 2 to form one hole portion.
Further, a step portion 18b that extends below each of the pair of side plate portions 18 and is also connected to the bottom plate portion 16 at a position below the long hole 18a (side away from the vehicle body in the operation direction D2). Is provided. Due to the stepped portion 18b, the gap portion 23 has a smaller dimension in the width direction D3.

  The cotter 25 has a rod-like cotter body 26, an operation unit 27 provided integrally with the cotter body 26, an elastic member 28 disposed on the opposite side of the brake shoe 3 in the pressing direction D1 with respect to the cotter body 26. have.

  The cotter body 26 has a rod shape extending in the operation direction D2 in the gap 23. The upper end portion of the cotter body 26 (the end portion on the vehicle body side in the operation direction D2) is a convex portion 26a projecting on both sides in the width direction D3, and the cotter body 26 as a whole is T-shaped when viewed from the pressing direction D1. I am doing.

  The cotter body 26 holds the brake shoe 3 on the shoe head 2. The cotter 25 is disposed in the gap 23 and is slidable in the operation direction D2 in the gap 23.

Further, as shown in FIG. 6, the cotter body 26 is provided with a cotter recess 26b that is recessed toward the brake shoe 3 on the surface facing the opposite side of the brake shoe 3 in the pressing direction D1. The cotter recess 26b is a notch provided so as to cut out the surface of the cotter body 26. When the cotter body 26 is viewed from the width direction D3, the cotter recess 26b gradually moves toward the bottom of the cotter recess 26b in the pressing direction D1. The operation direction D2 has a triangular shape with a small dimension, and the apex of the triangle is located at the bottom of the cotter recess 26b.
Further, in the cotter recess 26b, the angle formed by the imaginary line X passing through the apex and extending in the pressing direction D1 and the cotter recess 26b is different between above and below the imaginary line X. That is, as an example, α = 50 degrees above the virtual line X and β = 40 degrees below the virtual line X may be used.

  The operation unit 27 is provided on the cotter body 26 so as to protrude in the width direction D3 from one of the protrusions 26a at the upper end of the cotter body 26. In this embodiment, the operation part 27 is a bolt screwed into the convex part 26a. The operation portion 27 extends from the gap portion 23 through the long hole 18 a of the side plate portion 18 to the outside of the shoe head main body 15. The operation unit 27 is provided so as to extend outward in the width direction D <b> 3 of the carriage 100 in a state where the brake device 1 is attached to the carriage 100.

  Here, in a state where the brake shoe 3 is held by the shoe head 2, the position where the cotter body 26 is disposed between the gap portion 23 (guide space) and the mounting hole 12 is set as a fixed position, and the cotter body 26 is attached. The position arranged outside the hole 12 is defined as a non-fixed position. In this embodiment, the non-fixed position is above the fixed position. In the fixed position, the bolt that is the operation portion 27 contacts the lower end portion of the long hole 18a, and the convex portion 26a contacts and is supported by the step portion 18b. In this manner, the cotter body 26 is operated by the operation unit 27 moving within the formation range of the long hole 18a, and the operation unit 27 can slide the cotter body 26 between the fixed position and the non-fixed position. Yes.

  The elastic member 28 is a leaf spring in this embodiment. The elastic member 28 has a surface directed toward the cotter body 26, a leaf spring body portion 28a extending in the operation direction D2 along the surface of the cotter body 26, and a lower end of the leaf spring body portion 28a toward the surface of the cotter body 26. And a pressing portion 28b that protrudes.

  The leaf spring body 28a is braked in the pressing direction D1 from the position supported by the support shaft 19 provided between the pair of side plates 18 above the upper end of the long hole 18a and extending in the width direction D3 toward the operation direction D2. It bends after inclining toward the side away from the shoe 3 and extends straight downward in the operation direction D2. In addition, the leaf spring main body 28a is in a state of being in contact with the regulating shaft 20 that extends between the pair of side plate portions 18 at a position that extends straight in the operation direction D2.

  The pressing portion 28b is formed so as to protrude in the pressing direction D1 toward the cotter main body 26, and is inserted into the cotter concave portion 26b when the cotter main body 26 is disposed at the fixed position. The shape of the pressing portion 28b corresponds to the shape of the cotter concave portion 26b, and has a triangular shape in which the dimension in the operation direction D2 gradually decreases in the pressing direction D1 when viewed from the width direction D3.

  As a result, in the non-fixed position, the pressing portion 28b comes into contact with the surface of the cotter body 26 and applies an elastic force toward the cotter body 26, while in the fixed position, the pressing portion 28b is disposed in the cotter recess 26b. In addition, the elastic force is not applied toward the cotter body 26 while being able to contact the cotter body 26. That is, in the non-fixed position, the pressing portion 28 b is along the inner surface of the cotter recess 26 b of the cotter body 26.

  When the cotter body 26 is in the fixed position, the movement of the cotter body 26 in the operation direction D2 is restricted by the pressing portion 28b, and the cotter body 26 can be held in the fixed position.

Next, a method for attaching the brake shoe 3 in the present embodiment will be described.
First, the cotter body 26 is inserted into the gap 23 in a state where the convex portion 26a of the cotter body 26 is positioned on the non-fixed position side in the operation direction D2.

  Next, the operating portion 27 is inserted into the long hole 18 a and screwed into the convex portion 26 a of the cotter body 26.

  Next, a procedure for moving the cotter will be described. That is, the cotter body 26 is slid in the operation direction D2 along the tangential direction of the wheel 101 between the fixed position and the non-fixed position by operating the operation unit 27 in the gap 23 serving as a guide space. The position of the cotter body 26 is changed. As a result, the brake shoe 3 is held by the shoe head body 15 by disposing the cotter body 26 between the gap 23 of the shoe head body 15 and the mounting hole 12 of the brake shoe 3 at a fixed position. On the other hand, the brake shoe 3 does not hold the shoe head 2 by operating the operation unit 27 and sliding the cotter body 26 to the non-fixed position.

  In the brake device 1 of the present embodiment described above, the brake shoe 3 can be easily attached to the shoe head 2 by the cotter 25 only by moving the cotter body 26 linearly without causing the cotter body 26 to move in a complicated manner. Can be retained. That is, the attachment / detachment work of the brake shoe 3 from the shoe head 2 can be facilitated and simplified only by executing the step of sliding the cotter body 26.

  Further, since the bolt that is the operation unit 27 is provided so as to extend outward in the width direction D3 of the carriage 100, the operator can easily access the operation unit 27, and the cotter body 26 can be easily slid. .

  Furthermore, since the guide space in which the cotter body 26 is disposed is the gap 23 surrounded by the bottom plate portion 16 and the side plate portion 18 of the shoe head 2, the guide space can be easily formed in the shoe head body 15. . That is, it is not necessary to form a complicated guide space in the shoe head body 15 by using machining or the like, and the processing cost of the guide space can be reduced.

  Further, since the operating portion 27 is guided by the long hole 18a, the cotter body 26 can be easily slid to attach / detach the brake shoe 3. At this time, since the operating portion 27 is operated within the formation range of the long hole 18a, the movement of the cotter body 26 can be stopped when the operating portion 27 reaches the end of the long hole 18a. That is, the cotter body 26 can be positioned by the long hole 18a. Therefore, even when it is difficult to confirm the position of the cotter body 26 by visual observation or the like, the cotter body 26 can be reliably slid between the fixed position and the non-fixed position.

  In addition, since the elastic member 28 is provided, the presser 28b is inserted into the cotter recess 26b of the cotter body 26 in a state where the arrangement position of the cotter body 26 is not operated by the operation unit 27, so that the cotter body 26 at the fixed position. Can be controlled to move to the non-fixed position side.

  Further, the pressing portion 28b of the elastic member 28 is inserted into the cotter recess 26b at the fixed position, so that the positioning of the cotter main body 26 at the fixed position and the position of the cotter main body 26 can be fixed. Furthermore, in the non-fixed position, the pressing portion 28 b can come into contact with the cotter body 26 and give an elastic force from the elastic member 28 to the cotter body 26. Therefore, rattling of the cotter body 26 can be suppressed when the cotter body 26 moves from the non-fixed position to the fixed position. Further, when the elastic member 28 tries to enter the cotter recess 26b of the cotter body 26 by its own elastic force, an appropriate texture can be obtained when the cotter body 26 moves from the non-fixed position to the fixed position. For this reason, it becomes easy to determine whether or not the cotter body 26 has been reliably disposed at the fixed position.

Further, the elastic member 28 does not apply an elastic force to the cotter body 26 at the fixed position. Therefore, by applying an elastic force to the cotter body 26, the time during which the elastic member 28 is loaded can be set to only the time when the cotter body 26 is placed at the non-fixed position during maintenance, for example. The replacement life of the main body 26 can be extended.
In the present embodiment, for example, a sleeve may be provided in the gap between the operation portion 27 that is a bolt and the long hole 18a to suppress rattling when the cotter body 26 is slid.

[First modification]
As shown in FIG. 7, the cotter 30 may include a cotter body 36, an operation unit 27, and an elastic member 37.
Unlike the above-described cotter body 26, the cotter body 36 is not provided with a convex portion 26a and a cotter concave portion 26b. That is, the cotter body 36 has a substantially rectangular parallelepiped rod shape.

  The elastic member 37 is a leaf spring. The elastic member 37 has a surface directed toward the cotter body 36, a leaf spring body portion 38 extending in the operation direction D2 along the surface of the cotter body 26, and a lower end of the leaf spring body portion 38 toward the surface of the cotter body 36. It has the pressing part 39 which protrudes integrally.

  The leaf spring main body 38 extends straight from the position supported by the support shaft 19 downward in the operation direction D2. The pressing portion 39 is formed so as to protrude in the pressing direction D <b> 1 toward the cotter main body 36, and is in surface contact with the surface of the cotter main body 36. The pressing portion 39 is formed to be bent at a right angle from the lower end of the leaf spring main body portion 38 when viewed from the width direction D3.

  In this modification, an elastic force is always applied from the elastic member 37 to the cotter body 36.

  In the brake device 1 including such a cotter 30, the cotter body 36 is slid from the non-fixed position to the fixed position in the operation direction D2, so that the elastic force of the elastic member 37 and the pressing portion 39 of the elastic member 37 are reduced. The cotter body 36 is held in a fixed position by friction. By using such a cotter 30, the shape of the elastic member 37 can be simplified, so that the work of attaching and detaching the brake shoe 3 can be facilitated and simplified while suppressing the processing cost of the cotter 30.

[Second modification]
As illustrated in FIG. 8, the cotter 40 may include a cotter body 46, an operation unit 27, and an elastic member 47. The cotter body 46 is provided with a convex portion 46a that protrudes in a direction away from the brake shoe 3 in the pressing direction D1 above the operation direction D2.

  The elastic member 47 is a leaf spring and is formed so as to extend straight from the support shaft 19 in the operation direction D2.

  In the brake device 1 including such a cotter 40, the cotter body 46 is slid in the operation direction D2 from the non-fixed position to the fixed position, so that the cotter body is rubbed by the elastic force of the elastic member 47 and the friction with the elastic member 47. 46 is held in a fixed position. By using such a cotter 40, the shape of the elastic member 47 can be simplified, so that the work of attaching and detaching the brake shoe 3 can be facilitated and simplified while suppressing the processing cost of the cotter 40. In particular, since the cost can be reduced by providing the protrusion 46a on the cotter body 46, compared with the case of processing the elastic member 47, the cost advantage is particularly great in this modification.

[Third Modification]
As shown in FIG. 9, the cotter 50 may include a cotter body 56, an operation unit 27, and an elastic member 47. The cotter body 56 has an inclined surface 56a whose surface facing away from the brake shoe 3 in the pressing direction D1 is inclined so as to gradually move away from the brake shoe 3 downward in the operation direction D2.

  In the brake device 1 including such a cotter 50, the cotter body 56 is held at the fixed position by the elastic force of the elastic member 47 by sliding the cotter body 56 from the non-fixed position to the fixed position in the operation direction D2. . By using such a cotter 50, the shape of the elastic member 47 can be simplified, so that the work of attaching and detaching the brake shoe 3 can be facilitated and simplified while suppressing the processing cost of the cotter 50. In particular, since the cost can be reduced by providing the inclined surface 56a on the cotter body 56, compared with the case of processing the elastic member 47, the cost advantage is particularly great in this modification.

[Fourth modification]
As shown in FIG. 10, the cotter 60 may include a cotter body 66, an operation unit 27, and an elastic member 28. The cotter main body 66 is provided with a cotter convex portion 66a that protrudes toward the opposing surface 16a in a direction approaching the brake shoe 3 in the pressing direction D1 above the operation direction D2.

  The cotter convex portion 66a is disposed in the bottom concave portion 16c of the bottom plate portion 16. When the cotter main body 66 slides and moves from the non-fixed position to the fixed position, the cotter convex portion 66a moves upward in the operation direction D2 in the bottom concave portion 16c. It comes in contact with the side bottom surface 16c1 facing the direction.

  In the brake device 1 including such a cotter 60, when the cotter body 66 is disposed at the fixed position by operating the operation unit 27, the cotter convex portion 66a is caught by the step formed by the bottom concave portion 16c, The movement of the cotter body 66 in the operation direction D2 is restricted. Therefore, the cotter body 66 can be positioned reliably.

  Further, the bottom recess 16c is formed by machining the casting surface by machining or the like in order to be able to cope with the dimensional tolerance of the shoe head body 15. That is, since the bottom recess 16c is originally necessary for accommodating the cotter 60 in the gap 23 of the shoe head body 15, it is not necessary to newly provide a member for restricting the movement of the cotter body 66. Therefore, since the movement of the cotter main body 66 can be restricted using the originally provided bottom recess 16c, the attaching and detaching work of the brake shoe 3 can be facilitated and simplified while suppressing the cost.

[Fifth Modification]
As shown in FIG. 11, the cotter 70 may include a cotter body 76 and an operation unit 77. In the present modification, elongated holes 78a are formed in the pair of side plate portions 18, respectively. The long hole 78a is opened above the operation direction D2.

The cotter body 76 is a rod-shaped member as in the above-described embodiments and modifications.
The operation portion 77 is a convex portion that integrally projects from the upper end of the operation direction D2 of the cotter body 76 to both sides in the width direction D3. And the operation part 77 has the dimension of the width direction D3 equivalent to the dimension of the width direction D3 of the long hole 78a while penetrating the long hole 78a of the side-plate part 18. As shown in FIG.

  In the brake device 1 including such a cotter 70, the operation portion 77 is supported by the long hole 78a, so that it is possible to suppress rattling when the cotter body 76 is slid. Therefore, smooth sliding movement is possible even if the cotter 70 does not have an elastic member as in the above-described embodiments and modifications.

  Further, since the long hole 78a opens upward, the cotter body 76 can be easily installed by inserting the cotter body 76 into the gap 23 from above.

  In this case, a restricting member that restricts the cotter body 76 from being arbitrarily moved from the fixed position to the non-fixed position side may be provided separately. Such a regulating member may be, for example, the elastic member described above.

  Furthermore, in this modification, the long hole 78a and the operation part 77A may be provided only in one side plate part 78 in the width direction D3 of the carriage. In this case, as shown in FIG. 12, the operating portion 77A comes in contact with the support portion 77Aa disposed in the long hole 78a in the width direction from the outer surface of the side plate portion 78 in which the long hole 78a is formed, and from the long hole 78a. It is also preferable to have an enlarged portion 77Ab formed with a large dimension in the pressing direction D1. As a result, even when the operation portion 77A is provided only on one side in the width direction D3, it is possible to suppress rattling when the cotter body 76 is slid.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, each composition in embodiment and each modification, those combinations, etc. are examples, and within the range which does not deviate from the meaning of the present invention, composition of Additions, omissions, substitutions, and other changes are possible. Further, the present invention is not limited by the embodiments, and is limited only by the scope of the claims.

  For example, the elastic member may be a cylindrical spring or the like instead of the leaf spring.

Further, the shape of the cotter body and the shape of the elastic member are not limited to those described above.
In the cotter body, the fixed position may be higher than the non-fixed position, contrary to the above-described embodiment and modifications. That is, when the brake shoe 3 is supported by the shoe head 2, the cotter body is slid and moved upward in the operation direction D2.

  In the above description, the gap portion 23 is provided as the guide space of the cotter body. However, the guide space may be formed by machining or the like in the shoe head body without the gap portion 23.

  The side plate portion may be formed with an opening window that penetrates the side plate portion in the width direction D3 so that the position of the lower end of the cotter main body can be visually observed in a state where the cotter main body is in the fixed position. In addition, a mark may be provided on the side surface of the cotter body so as to enable visual observation at the position of such an opening window. With such an opening window or mark, it can be easily confirmed that the cotter body is disposed at the fixed position.

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

DESCRIPTION OF SYMBOLS 1 ... Brake device 2 ... Shoe head 3 ... Brake shoe 4 ... Brake main body 10 ... Back surface 11 ... Mounting part 12 ... Mounting hole 15 ... Shoe head main body 16 ... Bottom plate part 16 ... Opposite surface 16b ... Bottom 16c ... Bottom part recessed part 16c1 ... side Bottom surface 18 ... Side plate portion 18a ... Long hole 18b ... Step portion 19 ... Support shaft 20 ... Regulator shaft 22 ... Head recess 23 ... Cavity portion 25 ... Cotter 26 ... Cotter body 26a ... Convex portion 26b ... Cotter recess 27 ... Operating portion 28 ... Elastic member 28a ... leaf spring body 28b ... holding part 30 ... cotter 36 ... cotter body 37 ... elastic member 38 ... leaf spring body 39 ... holding part 40 ... cotter 46 ... cotter body 46a ... convex part 47 ... elastic member 50 ... Cotter 56 ... Cotter body 56a ... Inclined surface 60 ... Cotter 66 ... Cotter body 66a ... Cotter convex part 16c1 ... Side bottom surface 70 ... Cotter 76 ... Cotter body 77 ... Control Part 16c1 ... Side bottom surface 78a ... Long hole 77A ... Operation part 77Aa ... Supporting part 77Ab ... Enlarged part 100 ... Carriage 101 ... Wheel 101a ... Tread 111 ... Hanger 112 ... Case 113 ... Arm 114 ... Push bar O ... Axis D1 ... Pressing direction D2 ... Operation direction D3 ... Width direction

Claims (13)

A shoe head body that holds a mounting portion formed with a mounting hole that protrudes from the rear surface of the brake shoe to the side opposite to the tread surface and that extends in the operation direction of the brake shoe pressed against the tread surface of the wheel;
A cotter supported by the shoe head body and capable of holding the brake shoe on the shoe head body;
With
The shoe head main body is provided with a head concave portion in which the mounting portion can be disposed, and a guide space extending in the operation direction communicating with the head concave portion is provided.
The cotter is movable between the fixed position and the non-fixed position in the operation direction in the guide space, and is disposed between the mounting hole and the guide space at the fixed position. A brake shoe is held on the shoe head main body, and is disposed outside the mounting hole at the non-fixed position, and has a cotter main body capable of providing an operation part ,
The shoe head main body is provided with a long hole extending in the operation direction through the direction orthogonal to the operation direction,
The cotter body is a shoe head that is operated in the operation direction between the fixed position and the non-fixed position, which are within the long hole forming range, through the operation portion disposed in the long hole. The shoe head body is
A bottom plate portion having a facing surface facing the back surface;
The bottom plate portion rises in the direction along the tangential direction of the wheel in the bottom plate portion and from both edges in the width direction perpendicular to the pressing direction to which the brake shoe is pressed, and rises in the direction away from the brake shoe. A pair of side plate portions provided;
Have
The head recess is formed so as to be recessed from the facing surface to the pair of side plate portions,
The shoe head according to claim 1, wherein the guide space is a gap surrounded by the bottom plate portion and the pair of side plate portions.   The shoe head according to claim 2, wherein the side plate portion is provided with the elongated hole penetrating in a direction orthogonal to the operation direction and extending in the operation direction.   4. The shoe head according to claim 2, wherein the cotter further includes an elastic member supported by the shoe head body and capable of holding the cotter body in the fixed position. The elastic member is a leaf spring disposed along the cotter body,
The elastic member is
A leaf spring main body extending along the operation direction and supported by the shoe head main body,
A pressing part protruding from the leaf spring main body part toward the cotter main body,
Have
The shoe head according to claim 4, wherein the cotter body is provided with a cotter recess into which the pressing portion is inserted at the fixed position. A shoe head body that holds a mounting portion formed with a mounting hole that protrudes from the rear surface of the brake shoe to the side opposite to the tread surface and that extends in the operation direction of the brake shoe pressed against the tread surface of the wheel;
A cotter supported by the shoe head body and capable of holding the brake shoe on the shoe head body;
With
The shoe head main body is provided with a head concave portion in which the mounting portion can be disposed, and a guide space extending in the operation direction communicating with the head concave portion is provided.
The cotter is movable between the fixed position and the non-fixed position in the operation direction in the guide space, and is disposed between the mounting hole and the guide space at the fixed position. Holding a brake shoe on the shoe head body, and having a cotter body disposed outside the mounting hole in the non-fixed position;
The shoe head body is
A bottom plate portion having a facing surface facing the back surface;
The bottom plate portion rises in the direction along the tangential direction of the wheel in the bottom plate portion and from both edges in the width direction perpendicular to the pressing direction to which the brake shoe is pressed, and rises in the direction away from the brake shoe. A pair of side plate portions provided;
Have
The head recess is formed so as to be recessed from the facing surface to the pair of side plate portions,
The guide space is a gap surrounded by the bottom plate portion and the pair of side plate portions,
The cotter further includes an elastic member supported by the shoe head body and capable of holding the cotter body in the fixed position;
The elastic member is a leaf spring disposed along the cotter body,
The elastic member is
A leaf spring main body extending along the operation direction and supported by the shoe head main body,
A pressing part protruding from the leaf spring main body part toward the cotter main body,
Have
The cotter body is provided with a cotter concave portion into which the pressing portion is inserted at the fixed position.   The shoe head according to claim 5 or 6, wherein the elastic member is in a state in which the cotter body is not applied with an elastic force toward the shoe head body by the pressing portion in a state where the cotter body is in the fixed position. . On the bottom surface of the bottom plate that faces away from the facing surface in the pressing direction, a bottom recess that is recessed in the pressing direction toward the facing surface is formed on the non-fixed position side in the operation direction,
The cotter main body is formed with a cotter convex portion protruding toward the bottom surface in the pressing direction on the non-fixed position side of the operation direction,
The shoe head according to any one of claims 2 to 7, wherein the bottom concave portion and the cotter convex portion are in contact with the operation direction at the fixed position.   A shoe head body that holds a mounting portion formed with a mounting hole that protrudes from the rear surface of the brake shoe to the side opposite to the tread surface and that extends in the operation direction of the brake shoe pressed against the tread surface of the wheel;
  A cotter supported by the shoe head body and capable of holding the brake shoe on the shoe head body;
  With
  The shoe head main body is provided with a head concave portion in which the mounting portion can be disposed, and a guide space extending in the operation direction communicating with the head concave portion is provided.
  The shoe head main body is provided with a long hole extending in the operation direction through the direction orthogonal to the operation direction,
  The cotter is
  The brake shoe is movable between the fixed position and the non-fixed position in the operation direction in the guide space, and is disposed between the mounting hole and the guide space at the fixed position. A cotter body which is held by the shoe head body and is arranged outside the mounting hole in the non-fixed position;
  An operating portion that is integrally or screwably provided on the cotter body, is disposed in the elongated hole, and is operated in the operating direction between a fixed position and an unfixed position that are within a formation range of the elongated hole; ,
  Have
  The cotter body is a shoe head that is operated in the operation direction by the operation portion between the fixed position and the non-fixed position that are within the formation range of the long hole. The brake shoe is provided on a shoe head body that protrudes from the rear surface of the brake shoe pressed against the tread surface of the wheel to the opposite side of the tread surface and holds an attachment portion formed with an attachment hole extending in the operation direction. A cotter that can be held on the shoe head body,
The cotter body,
Provided integrally with the cotter body or so as to be screwable, and is disposed in a long hole extending through the shoe head body in a direction orthogonal to the operation direction and extending in the operation direction. An operation unit operated in the operation direction between a fixed position and a non-fixed position,
Have
The cotter body is
The fixed position and the non-fixed position in the operation direction in a guide space of the shoe head body provided so as to extend in the operation direction in communication with a head recess provided so that the mounting portion of the shoe head body can be disposed. The brake shoe is held by the shoe head body by being arranged between the mounting hole and the guide space at the fixed position. A cotter arranged outside the mounting hole in a fixed position.   The brake shoe is provided on a shoe head body that protrudes from the rear surface of the brake shoe pressed against the tread surface of the wheel to the opposite side of the tread surface and holds an attachment portion formed with an attachment hole extending in the operation direction. A cotter that can be held on the shoe head body,
  It has a cotter body that can be equipped with an operation part,
  The cotter body is
  A fixed position and a non-fixed position in the operation direction in the guide space of the shoe head body provided so as to extend in the operation direction in communication with a head recess provided so that the mounting portion of the shoe head body can be disposed. The brake shoe is held by the shoe head body by being disposed between the mounting hole and the guide space at the fixed position, and the mounting position at the non-fixed position. The formation range of the long hole through the operation portion disposed in the long hole disposed in the shoe head main body and extending in the direction orthogonal to the operation direction. A cotter operated in the operation direction between the fixed position and the non-fixed position. The shoe head according to any one of claims 1 to 9 ,
A brake shoe held by the shoe head body in the shoe head;
A brake device comprising: A state in which a mounting portion that protrudes from the rear surface of the brake shoe pressed against the tread surface of the wheel to the opposite side of the tread surface and that has a mounting hole extending in the operation direction is disposed in a head recess provided in the shoe head body. Whether the cotter body disposed in the guide space communicating with the head recess and extending in the operation direction is moved in the operation direction so that the cotter body is disposed between the mounting hole and the guide space. Or including a step of arranging outside the mounting hole, and in the step of arranging, a formation range of a long hole provided in the shoe head body and extending in a direction perpendicular to the operation direction. The cotter body is operated in the operation direction between an inner fixed position and a non-fixed position ,
A brake shoe attaching / detaching method in which the cotter body is operated in the operation direction in the arranging step after the operation part is screwed into the cotter body and the operation part is inserted through the elongated hole .

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