JP4555663B2 - Parking brake device - Google Patents

Description

  The present invention relates to a parking brake device in which a brake cable is pulled and a brake unit is braked when a foot lever pivotally supported by a base member fixed to a vehicle body is depressed.

  As a conventional parking brake device for an industrial vehicle such as a forklift, a manual type hand brake disposed in the vicinity of a steering is known. For example, there is a parking brake device described in Patent Document 1 proposed by the present applicant.

  This manual type parking brake device is mounted on, for example, a forklift, and a manual brake lever is pivotally supported by a base member attached to a base of the forklift so as to be tilted. Further, a toggle mechanism for increasing the operating force of the brake lever to maintain the braking force of the brake and a lock mechanism for preventing the braking force of the brake from being lost due to an erroneous operation of the brake lever are provided. In the parking brake device configured as described above, the brake is operated by pulling the brake lever by hand, the release button for releasing the lock state of the lock mechanism is pressed to release the lock state, and then the brake lever is tilted. As a result, the braking force of the brake can be released.

JP 2000-52947 A

  However, in such a conventional technique, the operating force is set to 20 to 25 kgf in order to manually operate the brake lever. For this reason, in order to obtain a predetermined braking force, the brake lever ratio is increased.

  Furthermore, in the case of a forklift, the handling work by the fork in front of the driver's seat is the center, so it is desirable that the front view is as wide as possible. However, the manual type parking brake device described above is intended to improve the brake operation. Since the brake lever is disposed at a position where the hand can reach in front of the driver, the front view may be blocked.

  The present invention has been made paying attention to such problems of the prior art, and provides a parking brake device that can reliably obtain a braking force with an easy operation and does not obstruct the front view. It is intended to provide.

The gist of the present invention for achieving the object lies in the inventions of the following items.
[1] A parking brake device (1) in which a brake cable is pulled and a brake unit is braked when a foot lever (3) pivotally supported by a base member (2) fixed on the vehicle body side is depressed. )
A lock plate (50) that rotates together with the foot lever (3), a brake lock mechanism (60) that locks the foot lever (3) in a predetermined position to maintain braking of the brake unit, and the brake lock mechanism An interlock mechanism (70) for locking the operation of (60),
The brake lock mechanism (60) is engaged with a lock plate (50) when the foot lever (3) is in the predetermined position to lock the foot lever (3),
The interlock mechanism (70) is connected to a brake lever (91) of a traveling brake for braking the traveling of the vehicle via an interlock cable (90), and interlocks with the operation of the brake lever (91).
When the brake lever (91) is depressed, the operation of the brake lock mechanism (60) by the interlock mechanism (70) is unlocked, and the brake lever is braked by operating the foot lever (3). A parking brake device (1) characterized in that can be released.

[2] A parking brake device (1) in which a brake cable is pulled and a brake unit is braked when a foot lever (3) pivotally supported by a base member (2) fixed to the vehicle body is depressed. )
A lock plate (50) that rotates together with the foot lever (3), a brake lock mechanism (60) that locks the foot lever (3) in a predetermined position to maintain braking of the brake unit, and the brake lock mechanism An interlock mechanism (70) for locking the operation of (60),
The brake lock mechanism (60) includes a locking claw (61) that engages with the lock plate (50) to lock the foot lever (3) when the foot lever (3) is depressed to the predetermined position. Have
The interlock mechanism (70) is connected to the operation lever (91) via an interlock cable (90) and is pivotally supported by an interlock cable link (72), and the interlock cable link. An interlock link (71) that meshes with the locking claw (61) in conjunction with the swing of (72) and locks the operation of the locking claw (61),
The operation of the brake lever (60) by the interlock mechanism (70) is unlocked by the operation of the operation lever (91), and the brake unit is braked by operating the foot lever (3). Parking brake device (1) characterized in that it can be released.

[3] A parking brake device (1) in which a brake cable is pulled and a brake unit is braked when a foot lever (3) pivotally supported by a base member (2) fixed to a vehicle body is depressed. )
An adjuster (4) to which the brake cable is connected; a lock plate (50) that rotates together with the foot lever (3); and a locking claw (61) that meshes with the lock plate (50). A brake lock mechanism (60) that locks the lever (3) in a predetermined position to maintain braking of the brake unit; and an interlock link (71) that meshes with the locking claw (61). (71) includes an interlock mechanism (70) that meshes with the locking claw (61) to lock the operation of the brake lock mechanism (60),
The adjuster (4) is pivotally supported on a pivot shaft (33) on which the foot lever (3) is pivoted.
The lock plate (50) has a meshing part (51) that meshes with the locking claw (61),
The locking claw (61) includes a first claw portion (61a) that meshes with a meshing portion (51) of the lock plate (50), and a second claw portion (61b) that meshes with the interlock link (71). ) And an opening (62), and an inner side of the opening (62) restricts the operation of the locking claw (61). 63, 64) is inserted, and the other end of the biasing member (100) having one end fixed to the base member (2) side is connected, and the operation restricting shaft in the opening (62) is connected. (63, 64) and the biasing force by the biasing member (100) perform a non-linear predetermined operation,
The interlock mechanism (70) is connected to an operating lever (91) via an interlock cable (90), and is pivotally supported by an interlock cable link (71) interlocking with the interlock link (71). 72)
By the operation of the operation lever (91), the interlocking of the interlock link (71) and the locking claw (61) is released, the operation lock of the brake lock mechanism (60) is released, and the foot lever The parking brake device (1), wherein the braking of the brake unit can be released by operating (3).

  [4] The operation lever (91) also serves as a travel brake brake lever that brakes the travel of the vehicle. When the travel brake brake lever is depressed, the interlock cable (90) is pulled to Item [2] or [3], wherein the lock cable link (72) is displaced to a position where the interlocking between the interlock link (71) and the locking claw (61) is released. Parking brake device (1).

The present invention operates as follows.
In the parking brake device (1), a base member (2) is fixed on the vehicle body side, and a foot lever (3) connected to a brake cable is pivotally supported on the base member (2). . Since the brake cable is also connected to the brake unit, when the foot lever (3) is depressed, the brake cable is pulled to brake the brake unit.

  When the foot lever (3) is depressed and reaches a predetermined position, the lock plate (50) is locked by the brake lock mechanism (60). Since the brake unit is braked when the foot lever (3) is in a predetermined position, the brake unit is maintained braked by locking the lock plate (50).

  Since the operation of the brake lock mechanism (60) is locked by the interlock mechanism (70), even if the step lever (3) is operated, the brake lock mechanism (60) does not operate and the braking of the brake unit is not released.

  The interlock mechanism (70) is connected to, for example, a brake lever (91) of a traveling brake for braking the traveling of the vehicle via an interlock cable (90), and can be used to depress the brake lever (91). It is linked.

  Release of braking of the brake unit is performed after releasing the locked state of the brake lock mechanism (60) by the interlock mechanism (70). When the brake lever (91) is depressed, the locked state of the operation of the brake lock mechanism (60) by the interlock mechanism (70) is released, so that the brake unit can be released by operating the foot lever (3). Can do.

  More specifically, like the parking brake device (1) of [2], the interlock mechanism (70) is pivotally supported by an interlock cable link (72). (72) is connected to the brake lever (91) via an interlock cable (90). The interlock cable link (72) can be swung by operating the brake lever (91). The interlock link (71) that swings in conjunction with the swing of the interlock cable link (72) meshes with the locking claw (61) to lock the operation of the locking claw (61). it can. As a result, braking of the brake unit is maintained as described above.

  When releasing the braking while the braking of the brake unit is maintained, the interlock cable link (72) of the interlock mechanism (70) is swung by operating the brake lever (91) as described above. Thus, the interlock between the interlock link (71) and the locking claw (61) is released, and the brake lock mechanism (60) can be operated. By operating the foot lever (3) in this state, braking of the brake unit can be released.

  More specifically, like the parking brake device (1) of [3], the adjuster (4) to which the brake cable is connected is pivoted on a pivot shaft (33) on which the foot lever (3) is pivotally supported. When the step lever (3) is depressed, the brake lever (91) is pulled to rotate the brake unit in a braking direction.

  In the lock plate (50), the meshing part (51) can mesh with the first claw part (61a) of the locking claw (61). The second claw portion (61b) of the locking claw (61) can mesh with the interlock link (71).

  The opening (62) cut into the center of the locking claw (61) has a shape in which the corners of an asymmetric square are rounded. Since the operation restricting shaft (63, 64) fixed to the base member (2) side is inserted inside the opening (62), the locking claw (61) is inserted into the operation restricting shaft (63, 64). ) Restricts the operation. The other end of the urging member (100) having one end fixed to the base member (2) side is connected to the locking claw (61). The direction in which the locking claw (61) tries to move by the urging force of the urging member (100) varies depending on the position of the operation restricting shaft (63, 64) in the opening (62). As a result, the locking claw (61) can perform a predetermined nonlinear operation.

  As described above, since the parking brake device (1) according to the present invention is operated by the foot, the force necessary for the operation can be easily exerted, and can be easily operated, and a reliable braking force. Can be obtained.

  Further, since both the brake lever (91) and the foot pedal lever (3) of the traveling brake are disposed at the foot of the driver's seat, the front view is not obstructed and a good front view can be obtained.

  Furthermore, since the interlock mechanism (70) can lock the operation of the brake lock mechanism (60), erroneous release of braking of the brake unit due to an erroneous operation of the foot lever (3) can be prevented.

  The interlock mechanism (70) is connected to the brake lever (91) of the travel braking brake via the interlock cable (90). The operation lever can also be operated.

  According to the parking brake device of the present invention, since the lever for braking the brake is a foot lever that is depressed with a foot, the related member of the parking brake device is not disposed in the front field of view of the vehicle. There is no blocking.

  Further, since the lever for braking the brake is operated with the foot, a force having a magnitude necessary for reliably obtaining a predetermined braking force can be easily applied to the foot lever.

  In addition, since the brake during braking cannot be released by operating the foot lever unless the lock of the brake lock mechanism is unlocked by the interlock mechanism, it is possible to prevent the brake from being released due to erroneous operation of the foot lever. it can.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
Each figure shows an embodiment of the present invention.
As shown in FIGS. 1 to 4, the parking brake device 1 is depressed by a foot lever 3 pivotally supported by a base member 2 fixed on a vehicle body (not shown) side of a vehicle such as a forklift. As a result, a brake cable (not shown) is pulled to brake the brake unit.

  The base member 2 is formed by molding a metal plate, and the fixing portions 2a and 2a are each fixed to a predetermined installation location on the vehicle body side by bolts or the like. The base member 2 has an arcuate opening 21 into which one end of a torsion spring 100 (biasing member) made of a metal wire, which will be described later, is inserted.

  A base 31 of the foot lever 3 is pivotally supported on the left side surface 22 a of the base member 2 via a pivot shaft 33. A pedal 32 on which a foot is placed when the foot lever 3 is operated is fixedly provided on the distal end side of the foot lever 3. A lock plate 50 is fixed to the pivot shaft 33 in the vicinity of the left side 22a between the base 31 and the left side 22a. On the other hand, the adjuster 4 to which the brake cable is connected is pivotally supported by the pivot shaft 33 on the right side surface 22b of the fixed portion 2a. The brake cable is connected to a connecting member 40 attached to the adjuster 4. Thereby, the adjuster 4 can be rotated with the rotation of the foot lever 3 to pull or return the brake cable.

  Since the pivot shaft 33 rotates when the foot lever 3 is operated to rotate, the lock plate 50 rotates together with the foot lever 3. As shown in FIGS. 1 and 6, the lock plate 50 is formed with a meshing portion 51 that meshes with a locking claw 61 of a brake lock mechanism 60 described later. The lock plate 50 is formed with a protruding latching portion 52 for latching one end of the coil spring 103.

A brake lock mechanism 60 and an interlock mechanism 70 are disposed below the lock plate 50 on the left side surface 22a.
The brake lock mechanism 60 is disposed between the lock plate 50 and the interlock mechanism 70, and the lock claw 61 engages with the engagement portion 51 of the lock plate 50, thereby rotating the lock plate 50. The foot lever 3 is disabled and locked in a predetermined position to maintain braking of the brake unit.

  The locking claw 61 is formed with a first claw portion 61a that meshes with the meshing portion 51 of the lock plate 50, and a second claw portion 61b that meshes with an interlock link 71 of an interlock mechanism 70 described later. In the center, an opening 62 that is hollowed out is provided. The opening 62 has a shape obtained by rounding the corners of an asymmetrical vertically long rectangle into an arc shape, and the length of the upper edge is longer than the length of the lower edge. Two columnar operation restriction shafts 63 and 64 for restricting the operation of the locking claw 61 are inserted inside the opening 62.

  These operation restricting shafts 63 and 64 are fixed to the base member 2 side, and the operation restricting shaft 63 is disposed at a position where it can contact the upper edge of the opening 62. On the other hand, the operation restricting shaft 64 is located at a position lower than the operation restricting shaft 63 and is disposed at a position where it can contact the lower edge of the opening 62. The diameter of the operation restricting shaft 63 is larger than the diameter of the operation restricting shaft 64. The corners of the opening 62 are formed in accordance with the diameters of the respective motion regulating shafts 63 and 64, and the curvature radii of the two corners following the upper edge are the same as the radius of the motion regulating shaft 63, and the lower edge The radius of curvature of the two corners following is the same as the radius of the motion restricting shaft 64.

  A small hole 65 that penetrates the locking claw 61 is formed in the locking claw 61 below the opening 62. The small hole 65 is an insertion hole 65 for inserting one end of the torsion spring 100 that applies a biasing force to the locking claw 61. The locking claw 61 is disposed such that the insertion hole 65 overlaps the opening 21, and one end of the torsion spring 100 inserted into the insertion hole 65 reaches the opening 21. The insertion hole 65 has an inner diameter that is considerably larger than the outer diameter of the metal wire of the torsion spring 100 so that the operation of the locking claw 61 can be accommodated.

  The other end of the torsion spring 100 is attached to the metal cover 80 side that protects the brake lock mechanism 60 and the interlock mechanism 70. The cover 80 is also provided with an insertion hole 81 penetrating the cover 80, and the other end of the torsion spring 100 is inserted from the inside of the cover 80 toward the outside. The inner diameter of the insertion hole 81 is slightly larger than the outer diameter of the metal wire of the torsion spring 100. The cover 80 is formed with a protruding latching portion 82 for latching the lower end of the coil spring 103.

  The locking claw 61 attempts to move in response to the urging force of the torsion spring 100, but the direction thereof varies depending on the positional relationship between the locking claw 61 and the operation regulating shafts 63 and 64. Therefore, the locking claw 61 can perform a non-linear cyclic operation (predetermined operation) by the operation restriction by the operation restriction shafts 63 and 64 and the urging force by the torsion spring 100.

  When the foot lever 3 is depressed and reaches a position (predetermined position) where the braking force of the brake unit is substantially maximized, the locking claw 61 is first engaged with the meshing portion 51 of the lock plate 50 rotated together with the foot lever 3. The claw portions 61 a engage with each other to lock the lock plate 50. Thereby, the braking force of the brake unit is maintained. An interlock mechanism 70, which is a mechanism for locking the operation of the locking claw 61 that locks the lock plate 50, is disposed below the locking claw 61.

  As shown in FIG. 5, the interlock mechanism 70 includes the interlock link 71 that meshes with the second claw portion 61 b of the locking claw 61, and an interlock cable link 72 that interlocks with the interlock link 71. ing. The interlock link 71 is pivotally supported at the lower end side by a pivot shaft 73 and can rotate. On the upper end side of the interlock link 71, a meshing portion 71a that meshes with the second claw portion 61b is formed, and on the lower end side, an abutting portion 71b that abuts on the interlock cable link 72 is formed. Further, a protruding portion 71c that protrudes closer to the upper end than the portion pivotally supported by the pivot shaft 73 and has a bent tip is formed.

  The interlock cable link 72 has an opening 74 in the first end 72 a, and a portion closer to the center than the opening 74 is pivotally supported by the pivot shaft 73. One end of the coil spring 101 is hung on the opening 74, and the other end of the coil spring 101 is hung on the protruding portion 71c.

  On the lower side of the portion pivotally supported by the pivot shaft 73, a contact portion 72b for contacting the contact portion 71b extends downward and then bends. An interlock cable 90 for operating the interlock mechanism 70 is connected to the second end 72c opposite to the first end 72a.

  The interlock cable 90 is connected to a stepping brake lever 91 (operation lever) of the traveling braking brake. Although the operation brake of the interlock cable 90 is also used as the brake lever 91 of the travel braking brake, there is no operational inconvenience because the parking brake device 1 is braking when the vehicle is stopped. As shown in FIG. 2, when the brake lever 91 is depressed in a direction (arrow A direction) in which the travel braking brake is applied, the brake lever 91 rotates in the arrow B direction about the pivot shaft 92. As a result, the interlock cable 90 is pulled, and the interlock cable link 72 rotates in the direction of arrow C about the pivot shaft 73. When the interlock cable link 72 rotates in the direction of arrow C, the interlock link 71 connected to the interlock cable link 72 by the coil spring 101 rotates in the direction of arrow C in conjunction with it. This rotation in the direction of arrow C is a direction in which the interlock link 71 is disengaged from the locking claw 61.

  A torsion spring 102 is attached to the pivot shaft 73. One end portion of the torsion spring 102 is attached to the base member 2 side, and the other end portion is hooked on the contact portion 72b. The urging force by the torsion spring 102 works to rotate the interlock cable link 72 in the direction opposite to the arrow C direction. For this reason, the interlock link 71 in which the contact portion 71b is in contact with the contact portion 72b also receives a force for rotating in the direction opposite to the arrow C direction. This direction is a direction in which the interlock link 71 meshes with the locking claw 61.

Next, the operation of the parking brake device according to the embodiment will be described.
FIG. 6 illustrates an operating state of the lock plate 50 and the brake lock mechanism 60 when the parking brake device 1 is operated.
The state indicated by reference numeral 201 is a state immediately before the meshing portion 51 and the first claw portion 61a are engaged with each other by the operator depressing the stepping lever 3 with a foot to some extent in order to operate the parking brake device 1. It is.

  The state indicated by reference numeral 202 is a state in which the foot lever 3 is depressed to the maximum vicinity, and the first claw portion 61a exceeds the engagement portion 51 and the engagement portion 51 and the first claw portion 61a can be engaged with each other. It has become. At this time, the locking claw 61 receives an urging force that is tilted from the torsion spring 100 to the side indicated by the arrow D.

  When the foot is released from the foot lever 3 in this state, the foot lever 3 rotates in the returning direction. As the foot lever 3 rotates, the lock plate 50 also rotates in the same direction so that the meshing portion 51 and the first claw portion 61a mesh with each other, and the lock plate 50 is locked from rotating in the returning direction. The state indicated by reference numeral 203 is this state, and the step lever 3 is maintained in a state where the brake unit is braked by pulling the brake cable of the brake unit. At this time, the engaging portion 71a of the interlock link 71 of the interlock mechanism 70 is engaged with the second claw portion 61b to lock the operation of the locking claw 61. Therefore, even if the foot lever 3 is operated, the brake unit The braking state cannot be released. Thereby, even if the stepping lever 3 is erroneously operated, there is no possibility that the brake is released by mistake. In this state, the urging force of the torsion spring 100 acts in the direction of tilting the locking claw 61 on the side opposite to the side indicated by the arrow D.

  In order to release the braking state of the brake unit, first, the brake lever 91 shown in FIG. 2 is depressed. Accordingly, as described above, the interlock mechanism 70 operates and the meshing between the locking claw 61 and the interlock link 71 is released, so that the operation lock of the brake lock mechanism 60 by the interlock mechanism 70 is released. In this state, once the foot lever 3 is stepped on, the urging force of the torsion spring 100 works in the direction of tilting the locking claw 61 on the side opposite to the side indicated by the arrow D as described above. Become. In this state, the lock of the lock plate 50 by the brake lock mechanism 60 is also released, so that the foot lever 3 can be rotated in the returning direction.

  When the foot is released from the stepping lever 3 once depressed, the stepping lever 3 rotates through a state indicated by reference numeral 206 to a point where the braking of the brake unit is completely released. The state of the lock plate 50 and the locking claw 61 at this time is a state indicated by reference numeral 207.

  As described above, in the parking brake device 1 according to the present embodiment, the operation lever for braking the brake is the foot lever 3 that steps on with the foot, so the related members of the parking brake device 1 are disposed in the front view of the vehicle. Will not obstruct the front view.

  Further, since the operation is performed with the foot, a force large enough to reliably obtain a predetermined braking force can be easily applied to the foot lever 3.

  Although the operation lever for unlocking the locking claw 61 by the interlock link 71 is also used as the brake lever 91 of the traveling brake, a dedicated operation lever may be provided separately.

It is a left view which shows the parking brake apparatus which concerns on one embodiment of this invention. It is a perspective view which shows the relationship between the interlock mechanism in FIG. 1, and the brake lever which performs the operation. 1 is a front view showing a parking brake device according to an embodiment of the present invention. It is a right view which shows the parking brake apparatus which concerns on one embodiment of this invention. It is a side view showing a brake lock mechanism and an interlock mechanism in a parking brake device according to an embodiment of the present invention. It is explanatory drawing explaining operation | movement with the lock plate and brake lock mechanism in the parking brake apparatus which concerns on one embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Parking brake apparatus 2 ... Base member 2a ... Fixed part 3 ... Foot lever 4 ... Adjuster 21 ... Opening 22a ... Left side 22b ... Right side 31 ... Base 32 ... Pedal 33 ... Pivoting shaft 40 ... Connecting member 50 ... Lock plate DESCRIPTION OF SYMBOLS 51 ... Meshing part 52 ... Latching part 60 ... Brake lock mechanism 61 ... Locking claw 61a ... 1st nail | claw part 61b ... 2nd claw part 62 ... Opening part 63 ... Motion control shaft 64 ... Operation control shaft 65 ... Insertion hole 70 ... Interlock mechanism 71 ... Interlock link 71a ... Mating portion 71b ... Abutting portion 71c ... Protruding portion 72 ... Interlock cable link 72a ... First end portion 72b ... Abutting portion 72c ... Second end portion 73 ... Pivot shaft 74 ... Opening 80 ... Cover 81 ... Insertion hole 82 ... Hanging part 90 ... Interlock cable 91 ... Brake lever 92 Pivot shaft 100 ... torsion springs 101 ... coil spring 102 ... torsion springs 103 ... coil spring

Claims (4)

In a parking brake device in which a brake cable is pulled and a brake unit is braked by a stepping lever pivotally supported by a base member fixed to the vehicle body side being depressed,
A lock plate that rotates together with the foot lever, a brake lock mechanism that locks the foot lever in a predetermined position to maintain braking of the brake unit, and an interlock mechanism that locks the operation of the brake lock mechanism,
The brake lock mechanism engages with a lock plate when the foot lever is in the predetermined position to lock the foot lever,
The interlock mechanism is connected via an interlock cable to a brake lever of a travel braking brake that brakes traveling of the vehicle, and interlocks with the operation of the brake lever.
The parking brake device according to claim 1, wherein when the brake lever is depressed, the operation of the brake lock mechanism is unlocked by the interlock mechanism, and braking of the brake unit can be released by operating the foot lever. In a parking brake device in which a brake cable is pulled and a brake unit is braked by a stepping lever pivotally supported by a base member fixed to the vehicle body side being depressed,
A lock plate that rotates together with the foot lever, a brake lock mechanism that locks the foot lever in a predetermined position to maintain braking of the brake unit, and an interlock mechanism that locks the operation of the brake lock mechanism,
The brake lock mechanism has a locking claw that engages with the lock plate to lock the foot lever when the foot lever is depressed to the predetermined position,
The interlock mechanism includes an interlock cable link that is pivotally supported and connected to an operation lever via an interlock cable, and the locking claw that is interlocked with the swing of the interlock cable link. An interlock link that meshes and locks the operation of the locking claw,
The parking brake device characterized in that the operation of the brake lock mechanism by the interlock mechanism is released by the operation of the operation lever, and the braking of the brake unit can be released by operating the foot lever. In a parking brake device in which a brake cable is pulled and a brake unit is braked by a stepping lever pivotally supported by a base member fixed on the vehicle body side being depressed,
It has an adjuster to which the brake cable is connected, a lock plate that rotates together with the foot lever, and a locking claw that engages with the lock plate, and locks the foot lever at a predetermined position to maintain braking of the brake unit. A brake lock mechanism, and an interlock link that meshes with the locking claw, and the interlock link meshes with the locking claw and locks the operation of the brake lock mechanism.
The adjuster is pivotally supported on a pivot shaft on which the foot lever is pivoted,
The lock plate has a meshing portion that meshes with the locking claw,
The locking claw includes a first claw portion that meshes with a meshing portion of the lock plate, a second claw portion that meshes with the interlock link, and an opening, and a lock is provided inside the opening. An operation restricting shaft fixed to the base member side for restricting the operation of the claw is inserted, and the other end of the urging member having one end fixed to the base member side is connected to the inside of the opening. A non-linear predetermined operation based on the position of the operation restricting shaft and the urging force by the urging member,
The interlock mechanism is connected to an operation lever via an interlock cable, and has an interlock cable link pivotally supported in conjunction with the interlock link,
The interlock of the interlock link and the locking claw is released by operation of the operation lever, the operation lock of the brake lock mechanism is released, and the braking of the brake unit is released by operating the foot lever. A parking brake device characterized by being capable of performing.   The operation lever also serves as a travel brake brake lever that brakes the travel of the vehicle. When the travel brake brake lever is depressed, the interlock cable is pulled, and the interlock cable link is connected to the interlock link. The parking brake device according to claim 2, wherein the parking brake device is displaced to a position where the engagement between the lock claw and the lock claw is released.

Images