Manual unlocking device

Abstract

To hold an operation member at an unlocking position without requiring electric power even if an external force acts on a traction member from a locking device in an unlocking state.SOLUTION: A manual unlocking device according to an embodiment, which is configured to manually unlock a locking device that locks a door device for opening / closing a doorway of a vehicle, includes an operation member that can be rotationally moved between a locking position and an unlocking position by a manual operation, a conversion mechanism that converts a rotational movement of the operation member into a linear movement, and a traction member that has one end coupled to the conversion mechanism and the other end coupled to the locking device, transmits the linear movement transmitted from the conversion mechanism to the locking device, and unlocks the door device, in which the conversion mechanism includes a plurality of links that are at a dead center position when the operation member rotationally moves from the locking position to the unlocking position.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a manual unlocking device. [Background technology]

[0002] Patent Document 1 discloses a technique for manually unlocking a latch lock that locks a door by operating a handle device to which a cable is connected. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-174435 A Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, the operating part of the handle device and the inner cable are directly connected, so when an external force is applied from the latch lock to the cable in the locking direction in the unlocked state, the operating part is directly pulled by the external force. Therefore, to prevent the operating part from returning to the locked position by itself due to such an external force, the operating part is positioned by a ball plunger or the like and held in the unlocked position. If the holding force of this ball plunger is strong, it can prevent the operating part from returning to the locked position due to the influence of an external force, but on the other hand, the operating burden of the operating part increases.

[0005] The present invention has been made to solve the above-mentioned problems, and aims to provide a manual unlocking device that can hold an operating member in the unlocked position without requiring electricity, even if an external force acts on the traction member from the locking device in the unlocked state. [Means for solving the problem]

[0006] As a means for solving the above problems, the present invention has the following configuration. (1) A manual unlocking device according to one aspect of the present invention is a manual unlocking device for manually unlocking a locking device that locks a door device that opens and closes the boarding and alighting entrance of a vehicle, and includes an operating member that can be manually operated to perform a rotational movement between a locked position and an unlocked position, a conversion mechanism that converts the rotational movement of the operating member into linear movement, and a traction member having one end connected to the conversion mechanism and the other end connected to the locking device, which transmits the linear movement transmitted from the conversion mechanism to the locking device and unlocks the door device, and the conversion mechanism has a plurality of links that are in a dead center position when the operating member rotates from the locked position to the unlocked position.

[0007] According to this configuration, when the operating member is operated to rotate to the unlocked position and the door device is unlocked, the links are in the dead center position. Therefore, even if an external force acts on the traction member from the locking device in the unlocked state, the operating member can be held in the unlocked position without requiring power.

[0008] (2) In the manual unlocking device described in (1) above, the pulling member is a cable, and the device further includes a slider mechanism to which the cable is fixed and which supports the cable movably in a direction along the linear motion, and one end of the multiple links is connected to the operating member and the other end is connected to the slider mechanism.

[0009] (3) In the manual unlocking device described in (2) above, the multiple links include a first link having one end rotatably connected around a connection portion with the operating member, and a second link having one end rotatably connected around a connection portion with the other end of the first link and the other end rotatably connected around a connection portion with the slider mechanism, and when the operating member rotates from the locked position to the unlocked position, the first link and the second link may be in a dead center position located on a straight line from one end to the other end.

[0010] (4) In the manual unlocking device described in (3) above, the operating member may be rotatable 90 degrees around a spindle between the locked position and the unlocked position, and may further include a gear mechanism that reduces the rotation of the spindle at a predetermined reduction ratio and transmits it to one end of the first link.

[0011] (5) In the manual unlocking device described in (4) above, the gear mechanism includes a drive gear whose center of rotation is rotatably connected to the spindle, and a driven gear whose center of rotation is connected to one end of the first link and meshes with the drive gear to transmit the rotational motion of the operating member to the first link, and the drive gear has a gear portion that meshes with the driven gear and a positioning portion that positions the position of the drive gear when the operating member is located in the locked position and the unlocked position, and the gear portion and the positioning portion may be arranged at different positions from each other on the circumference of a virtual circle centered on the spindle, which is the center of rotation of the drive gear.

[0012] (6) In the manual unlocking device described in (5) above, the cable, which is the traction member, is configured to be movable between a starting end and an end end in a direction along the linear motion, and may further include a limiting wall that contacts the drive gear to limit the rotational motion of the drive gear before the cable moves in the direction along the linear motion and reaches the starting end or the end end.

[0013] (7) In the manual unlocking device described in any of (4) to (6) above, the first link is configured to be rotatable around a first axis parallel to the support shaft at the connection portion between one end of the first link and the operating member, and when viewed from a direction along the first axis, the first axis may be positioned so as not to overlap with the rotation trajectory of the second link.

[0014] (8) In the manual unlocking device described in (2) above, the multiple links include a first link having one end rotatably connected around a connecting portion with the operating member, a second link having one end rotatably connected around a connecting portion with the other end of the first link and the other end rotatably connected around a connecting portion with a fixed point, and a third link having one end rotatably connected around a connecting portion with one end of the second link and the other end rotatably connected around a connecting portion with the slider mechanism, and when the operating member rotates from the locked position to the unlocked position, one end of the second link and one end of the third link may be in a dead center position located on a straight line.

[0015] (9) In the manual unlocking device described in (8) above, the operating member may be rotatable about a pivot between the locked position and the unlocked position, and may further include a transmission member that transmits the rotation of the pivot to one end of the first link.

[0016] (10) In the manual unlocking device described in (8) or (9) above, the length from one end to the other end of the third link may be shorter than the length from one end to the other end of the second link. Effect of the Invention

[0017] According to the present invention, even if an external force acts on the traction member from the locking device in the unlocked state, the operating member can be held in the unlocked position without requiring electric power. [Brief description of the drawings]

[0018] [Figure 1] 1 is a view of a vehicle door according to a first embodiment, seen from the outside in a width direction. [Diagram 2] FIG. 2 is a perspective view of the manual unlocking device of the first embodiment in a locked state. [Diagram 3] FIG. 2 is a front view of the manual unlocking device of the first embodiment in a locked state. [Figure 4] FIG. 2 is a front view of the manual unlocking device of the first embodiment during operation. [Diagram 5]FIG. 2 is a front view of the manual unlocking device of the first embodiment in an unlocked state. [Figure 6] FIG. 11 is a perspective view of the manual unlocking device of the second embodiment in a locked state. [Figure 7] FIG. 11 is a front view of the manual unlocking device of the second embodiment in a locked state. [Figure 8] FIG. 11 is a front view of the manual unlocking device of the second embodiment during operation. [Figure 9] FIG. 11 is a front view of the manual unlocking device of the second embodiment in an unlocked state. [Figure 10] 13 is an explanatory diagram of a toggle mechanism of a manual unlocking device according to a second embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following embodiment, an example of a manual unlocking device for manually unlocking a locking device that locks a door device that opens and closes the boarding and alighting doors of a railway vehicle (car) will be described. In the following description, expressions indicating relative or absolute arrangement, such as "parallel," "orthogonal," "center," and "coaxial," do not only mean such an arrangement strictly, but also include a state in which the components are relatively displaced with a tolerance or an angle or distance to the extent that the same function is obtained. In the drawings used in the following description, the scale of each component has been appropriately changed to make each component recognizable in size.

[0020] <Vehicle doors> FIG. 1 is a view of a vehicle door according to a first embodiment as viewed from the outside in a width direction. As shown in Fig. 1, the vehicle door includes a pair of doors 11 that open and close a vehicle entrance 10. Fig. 1 shows the door 11 in a fully closed position.

[0021] In the following explanation, an X, Y, Z Cartesian coordinate system is used as necessary. The X direction corresponds to the front-to-rear direction of the vehicle. The Y direction corresponds to the width direction of the vehicle. The Z direction corresponds to the height direction of the vehicle (direction of gravity) perpendicular to the X and Y directions. In the following explanation, of the X, Y, and Z directions, the arrow side in the figure is the plus (+) side, and the opposite side to the arrow is the minus (-) side. The +Y side corresponds to the outer side in the width direction, and the -Y side corresponds to the inner side in the width direction. The +Z side corresponds to the upper side in the direction of gravity, and the -Z side corresponds to the lower side in the direction of gravity.

[0022] The door 11 moves in the X direction by a driving force from a driving source (e.g., a motor) not shown in the figure so as to open and close the entrance 10. A door device 15 for opening and closing the entrance 10 of the vehicle and a locking device 16 for locking the door device 15 are provided above the entrance 10.

[0023] <Manual unlocking device> The manual unlocking device 1 is a device for manually unlocking a locking device 16 that locks a door device 15 that opens and closes a boarding / alighting door 10 of a vehicle. The manual unlocking device 1 is connected to the locking device 16 via a traction member 4. For example, the manual unlocking device 1 may be arranged so as to be operable from inside the vehicle, or so as to be operable from outside the vehicle. For example, the manual unlocking device 1 may be arranged in a position where it can be operated by passengers, crew members, station staff, etc. in an emergency. For example, the arrangement of the manual unlocking device 1 can be changed according to design specifications.

[0024] Fig. 2 is a perspective view of the manual unlocking device 1 of the first embodiment in a locked state. Fig. 3 is a front view of the manual unlocking device 1 of the first embodiment in a locked state. Fig. 4 is a front view of the manual unlocking device 1 of the first embodiment in the middle of operation. Fig. 5 is a front view of the manual unlocking device 1 of the first embodiment in an unlocked state. 2 to 5, the manual unlocking device 1 includes an operating member 2, a conversion mechanism 3, a traction member 4, a slider mechanism 5, a gear mechanism 6, and a limiting wall 7. The manual unlocking device 1 further includes a case 8 that houses the conversion mechanism 3, the traction member 4, the slider mechanism 5, the gear mechanism 6, and a part of the limiting wall 7. In each drawing, a part of the case 8 (for example, a cover) is omitted from the illustration.

[0025] <Operating parts> The operating member 2 is configured to be rotatable between a locked position (position shown in FIG. 3) and an unlocked position (position shown in FIG. 5) by manual operation. The operating member 2 is rotatable 90 degrees around the spindle 20 between the locked position and the unlocked position. The operating member 2 extends in the vertical direction in the locked position. The operating member 2 extends in the horizontal direction in the unlocked position. The portion of the operating member 2 opposite the portion connected to the spindle 20 is exposed to the outside of the case 8 between the locked position and the unlocked position.

[0026] <Conversion mechanism> The conversion mechanism 3 converts the rotational motion of the operating member 2 into linear motion. The conversion mechanism 3 has a plurality of links 21, 22 that are in a dead center position when the operating member 2 rotates from the locked position to the unlocked position. One end of the plurality of links 21, 22 is connected to the operating member 2, and the other end is connected to the slider mechanism 5. The slider mechanism 5 and the conversion mechanism 3 configure a so-called slider crank mechanism. The plurality of links 21, 22 include a first link 21 having one end rotatably connected about a connecting portion with the operating member 2, and a second link 22 having one end rotatably connected about a connecting portion with the other end of the first link 21, and the other end rotatably connected about a connecting portion with the slider mechanism 5.

[0027] The first link 21 is configured to be rotatable about a first shaft 25 parallel to the support shaft 20 at a connection portion between one end of the first link 21 and the operating member 2. In the locked position, the first link 21 extends vertically upward from one end to the other end of the first link 21. In the unlocked position, the first link 21 extends vertically downward from one end to the other end of the first link 21.

[0028] The second link 22 is configured to be rotatable about a second shaft 26 parallel to the first shaft 25 at a connection portion between one end of the second link 22 and the other end of the first link 21. The second link 22 extends vertically upward from one end of the second link 22 to the other end at each of the locked position and the unlocked position. Specifically, the second link 22 extends from one end of the second link 22 toward the upper right of the figure, and then extends toward the upper left of the figure to the other end of the second link 22 at each of the locked position and the unlocked position. The second link 22 is formed in a V-shape (specifically, a shape in which the minimum angle formed by the V is an obtuse angle) when viewed from a direction along the second shaft 26.

[0029] <Traction member> For example, the pulling member 4 is a cable. One end of the pulling member 4 is connected to the conversion mechanism 3. The other end of the pulling member 4 is connected to the locking device 16. The pulling member 4 transmits the linear motion transmitted from the conversion mechanism 3 to the locking device 16 to unlock the door device 15. The pulling member 4 is configured to be movable between a starting point P1 and a terminal point P2 in a direction along the linear motion in synchronization with the slider 31.

[0030] Although not shown, a pressing force (elastic force) is applied to the pulling member 4 by an elastic portion such as a spring constituting the locking device 16. As a result, a force is applied to the pulling member 4 to pull it vertically upward.

[0031] <Slider mechanism> The slider mechanism 5 supports the pulling member 4 (for example, an inner cable) so as to be movable in a direction along the linear motion. The other end of the pulling member 4 is fixed to the slider mechanism 5. The other end of the second link 22 is connected to the slider mechanism 5.

[0032] In the illustrated example, the slider mechanism 5 includes a slider 31 having a protruding portion 30 protruding toward the upper right of the figure, and a guide rail 32 extending vertically. The slider 31 is supported by the guide rail 32 so as to be movable along the guide rail 32. Note that the configuration of the slider mechanism 5 is not limited to the above and can be changed according to design specifications.

[0033] A pressing force (elastic force) by an elastic portion such as a spring acts on the slider 31 via the pulling member 4. Therefore, a force pulling the slider 31 together with the pulling member 4 in the vertically upward direction acts on the slider 31.

[0034] The other end of the second link 22 is connected to the tip of the protrusion 30 of the slider 31 so as to be rotatable about the connecting portion. The second link 22 is configured to be rotatable about a third axis 27 parallel to the second axis 26 at the connecting portion between the other end of the second link 22 and the tip of the protrusion 30 of the slider 31.

[0035] <Gear mechanism> The gear mechanism 6 reduces the rotation of the support shaft 20 at a predetermined reduction ratio and transmits the rotation to one end of the first link 21. The gear mechanism 6 includes a drive gear 40 and a driven gear 50 that meshes with the drive gear 40 and is driven to rotate.

[0036] The drive gear 40 has a rotation center rotatably connected to the support shaft 20. The driven gear 50 has a rotation center connected to one end of the first link 21. The driven gear 50 meshes with the drive gear 40 to transmit the rotational motion of the operating member 2 to the first link 21.

[0037] For example, the gear ratio B / A between the number of teeth A of the drive gear 40 and the number of teeth B of the driven gear 50 is 1 / 2. Note that the gear ratio B / A is not limited to the above and may be less than 1 / 2 or more than 1 / 2. For example, the gear ratio B / A can be changed according to the design specifications.

[0038] The drive gear 40 has a gear portion 41 that meshes with the driven gear 50, and a positioning portion 42 that positions the drive gear 40 when the operating member 2 is in the locked position or the unlocked position. The gear portion 41 and the positioning portion 42 are disposed at different positions on the circumference of an imaginary circle centered on the support shaft 20, which is the center of rotation of the drive gear 40.

[0039] In the illustrated example, the gear portion 41 is disposed within a range that forms a central angle of about 90 degrees around the support shaft 20 that is the rotation center of the drive gear 40. Note that the arrangement of the gear portion 41 is not limited to the above, and the gear portion 41 may be disposed within a range that forms a central angle of less than 90 degrees or more than 90 degrees around the support shaft 20 that is the rotation center of the drive gear 40. For example, the arrangement of the gear portion 41 can be changed according to design specifications.

[0040] In the illustrated example, the positioning portion 42 is disposed on the opposite side to the gear portion 41 in the radial direction centered on the support shaft 20, which is the center of rotation of the drive gear 40. The drive gear 40 is formed with a first recess 43 for positioning the drive gear 40 when the operating member 2 is in the locked position, and a second recess 44 for positioning the drive gear 40 when the operating member 2 is in the unlocked position. The positioning portion 42 is configured to include wall portions that form the first recess 43 and the second recess 44 in the drive gear 40.

[0041] In the illustrated example, a plunger 61 is attached to an inclined wall 60 of a case 8. For example, the plunger 61 is a ball plunger. The plunger 61 has a protrusion 62 (for example, a part of a ball) that protrudes toward the support shaft 20 that is the center of rotation of the drive gear 40. In the illustrated example, the protrusion 62 of the plunger 61 protrudes from the inclined wall 60 of the case 8 toward the lower left of the figure. Note that the protruding manner of the protrusion 62 of the plunger 61 is not limited to the above and can be changed according to design specifications.

[0042] For example, when the operating member 2 is located at the locked position, the convex portion 62 of the plunger 61 fits into the first concave portion 43 of the drive gear 40. This allows the drive gear 40 to be positioned when the operating member 2 is located at the locked position.

[0043] On the other hand, when the operating member 2 is located at the unlocked position, the convex portion 62 of the plunger 61 fits into the second concave portion 44 of the drive gear 40. This allows the drive gear 40 to be positioned when the operating member 2 is located at the unlocked position.

[0044] <Restriction wall> The limiting wall 7 comes into contact with the driving gear 40 to limit the rotational motion of the driving gear 40 before the towing member 4 is positioned at the starting point P1 or the terminal end P2 when the towing member 4 moves in a direction along the linear motion. In the example shown in the figure, the limiting wall 7 is provided on one surface of the case 8 facing the driving gear 40. The limiting wall 7 includes a first wall portion 71 that comes into contact with the driving gear 40 to limit the rotational motion of the driving gear 40 before the towing member 4 is positioned at the terminal end P2 when the towing member 4 moves from the starting point P1 side toward the terminal end P2 side in the direction along the linear motion, and a second wall portion 72 that comes into contact with the driving gear 40 to limit the rotational motion of the driving gear 40 before the towing member 4 is positioned at the starting point P1 when the towing member 4 moves from the terminal end P2 side toward the starting point P1 side in the direction along the linear motion.

[0045] For example, when the operating member 2 is located at the locked position, a part of the drive gear 40 contacts the second wall portion 72. The part of the drive gear 40 corresponds to one side of the root of the gear portion 41 in the direction of rotational movement of the drive gear 40. This makes it possible to protect the gear portion 41 of the drive gear 40 from being subjected to a load even when the operating member 2 is rotated so as to exceed the locked position.

[0046] On the other hand, when the operating member 2 is located in the unlocked position, another part of the drive gear 40 comes into contact with the first wall portion 71. The other part of the drive gear 40 corresponds to the other side of the root of the gear portion 41 in the direction of rotational movement of the drive gear 40. This makes it possible to protect the gear portion 41 of the drive gear 40 from being subjected to a load even when the operating member 2 is rotated beyond the unlocked position.

[0047] <First axis arrangement> When viewed from a direction along the first shaft 25, the first shaft 25 is disposed at a position that does not overlap with the rotation trajectory of the second link 22. In the locked position, the first shaft 25 is disposed vertically below one end of the second link 22. In the unlocked position, the first shaft 25 is disposed vertically above one end of the second link 22. In the unlocked position, the first shaft 25 is disposed in the space between one end and the other end of the second link 22.

[0048] <Lock status / unlock operation> Fig. 3 is a front view of the manual unlocking device 1 of the embodiment in a locked state, Fig. 4 is a front view of the manual unlocking device 1 of the embodiment in the middle of operation, and Fig. 5 is a front view of the manual unlocking device 1 of the embodiment in an unlocked state. Hereinafter, an example of the door locking state and a manual unlocking operation will be described with reference to Figs.

[0049] <An example of locked state> 1 and 3, for example, in a normal state, such as when the vehicle is moving, the door 11 is in a fully closed position and is locked by the locking device 16. For example, the door is locked when the vehicle is moving or when passengers cannot get on or off at the door on the opposite side to the platform.

[0050] In Fig. 3, the cable (pulling member 4) is in a position pulled vertically upward by a pressing force (elastic force) of an elastic part such as a spring (not shown). At this time, the slider 31 is pulled vertically upward together with the cable. The slider 31 is disposed at a position on the starting point P1 side in the direction along the linear motion of the cable.

[0051] <An example of unlocking action> 3 to 5, for example, in an emergency or during maintenance, the operating member 2 is rotated in the direction of the arrow R. For example, the operating member 2 is rotated 90 degrees around the support shaft 20 between the locked position and the unlocked position. In this case, the drive gear 40, whose rotation center is rotatably connected to the support shaft 20, rotates in the direction of the arrow R1.

[0052] At this time, the driven gear 50 meshing with the drive gear 40 rotates in the direction of arrow R2 around the first shaft 25. For example, when the gear ratio B / A is 1 / 2, when the operating member 2 is rotated 90 degrees around the support shaft 20, the driven gear 50 rotates 180 degrees around the first shaft 25.

[0053] Due to the rotation of the driven gear 50, the rotational motion of the operating member 2 is transmitted to the first link 21. Then, the second link 22 rotates as shown in Figures 3 to 4 and 5. In the position shown in Figure 5, one end of the second link 22 is disposed vertically below the first shaft 25.

[0054] The rotational movement of the second link 22 converts the rotational movement of the operating member 2 into linear motion directed vertically downward. Then, the slider 31 moves vertically downward along the guide rail 32. At this time, the cable is pulled vertically downward via the slider 31 against the pressing force of an elastic part such as a spring. As a result, the linear motion transmitted from the conversion mechanism 3 is transmitted to the locking device 16, and the door device 15 is unlocked.

[0055] When the operating member 2 rotates from the locked position to the unlocked position, it is at a dead point position where the first link 21 and the second link 22 are aligned on a straight line from one end to the other end. In the unlocked position shown in Fig. 5, the first link 21 and the second link 22 are aligned on the same vertical line from one end to the other end.

[0056] 5, the position of the drive gear 40 is determined by fitting the protrusion 62 of the plunger 61 into the second recess 44 of the drive gear 40. For example, the plunger 61 prevents the operating member 2 from returning to its original position (locked position) due to its own weight when the operating member 2 is in the unlocked position.

[0057] <Action and effect> As described above, the manual unlocking device 1 according to this embodiment is a manual unlocking device 1 for manually unlocking the locking device 16 that locks the door device 15 that opens and closes the entrance 10 of a vehicle. The manual unlocking device 1 includes the operating member 2 that can be rotated between a locked position and an unlocked position by manual operation, the conversion mechanism 3 that converts the rotational motion of the operating member 2 into linear motion, and the traction member 4 that has one end connected to the conversion mechanism 3 and the other end connected to the locking device 16, and transmits the linear motion transmitted from the conversion mechanism 3 to the locking device 16 to unlock the door device 15. The conversion mechanism 3 has a plurality of links 21, 22 that are in dead center positions when the operating member 2 rotates from the locked position to the unlocked position.

[0058] According to this configuration, when the operating member 2 is operated to rotate to the unlocked position and the door device 15 is unlocked, the multiple links 21, 22 are at the dead center position. Therefore, even if an external force acts on the traction member 4 from the locking device 16 in the unlocked state, the operating member 2 can be held in the unlocked position without requiring electric power.

[0059] In the manual unlocking device 1 according to this embodiment, the pulling member 4 is a cable. The manual unlocking device 1 further includes a slider mechanism 5 to which the cable is fixed and which supports the cable movably in a direction along the linear motion. One end of each of the multiple links 21, 22 is connected to the operating member 2, and the other end is connected to the slider mechanism 5. According to this configuration, the cable can be pulled via the slider mechanism 5, so that the door can be unlocked stably.

[0060] In the manual unlocking device 1 according to this embodiment, the multiple links 21, 22 include a first link 21 having one end rotatably connected about a connection portion with the operating member 2, and a second link 22 having one end rotatably connected about a connection portion with the other end of the first link 21, and the other end rotatably connected about a connection portion with the slider mechanism 5. When the operating member 2 rotates from the locked position to the unlocked position, the first link 21 and the second link 22 are in a dead center position, where one end to the other end of the first link 21 and one end to the other end of the second link 22 are located on a straight line. According to this configuration, when the operating member 2 is operated to rotate to the unlocked position and the door device 15 is unlocked, the first link 21 and the second link 22 are in dead center positions, where they are positioned on a straight line from one end to the other end. Therefore, even if an external force acts on the traction member 4 from the locking device 16 in the unlocked state, the operating member 2 can be held in the unlocked position without requiring electricity.

[0061] In the manual unlocking device 1 according to this embodiment, the operating member 2 can rotate 90 degrees around the spindle 20 between the locked position and the unlocked position. The manual unlocking device 1 further includes a gear mechanism 6 that reduces the rotation of the spindle 20 at a predetermined reduction ratio and transmits the rotation to one end of the first link 21. According to this configuration, the amount of rotational momentum of the operating member 2 can be amplified, so that the length of the first link 21 required to pull the cable by the same amount can be shortened.

[0062] In the manual unlocking device 1 according to this embodiment, the gear mechanism 6 includes a drive gear 40 whose center of rotation is rotatably connected to the support shaft 20, and a driven gear 50 whose center of rotation is connected to one end of the first link 21 and meshes with the drive gear 40 to transmit the rotational motion of the operating member 2 to the first link 21. The drive gear 40 has a gear portion 41 that meshes with the driven gear 50, and a positioning portion 42 that positions the position of the drive gear 40 when the operating member 2 is located at the locked position and the unlocked position. The gear portion 41 and the positioning portion 42 are located at different positions on the circumference of a virtual circle whose center is the support shaft 20, which is the center of rotation of the drive gear 40. According to this configuration, the gear portion 41 and the positioning portion 42 are disposed on the same virtual circumference. Therefore, the positioning portion 42 can stabilize the operation of the operating member 2, and the drive gear 40 can be prevented from becoming large.

[0063] In the manual unlocking device 1 according to this embodiment, the cable, which is the pulling member 4, is configured to be movable between a starting point P1 and an ending point P2 in a direction along the linear motion. The manual unlocking device 1 further includes a limiting wall 7 that comes into contact with the driving gear 40 to limit the rotational motion of the driving gear 40 before the cable reaches the starting point P1 or the ending point P2 when the cable moves in the direction along the linear motion. According to this configuration, even if the operating member 2 is forcibly rotated so as to exceed the locked or unlocked position, the gear portion 41 of the driving gear 40 can be protected from being subjected to a load.

[0064] In the manual unlocking device 1 according to this embodiment, the first link 21 is configured to be rotatable about a first shaft 25 parallel to the support shaft 20 at a connection portion between one end of the first link 21 and the operating member 2. When viewed from the direction along the first shaft 25, the first shaft 25 is disposed at a position not overlapping with the rotation trajectory of the second link 22. With this configuration, it is possible to avoid an increase in size of the manual unlocking device 1 in the direction along the first axis 25, compared to when the first axis 25 is positioned at a position where it overlaps with the rotational trajectory of the second link 22 when viewed in the direction along the first axis 25.

[0065] <Modification> In the above-described embodiment, the towing member is a cable, but the towing member is not limited to this. For example, the towing member may be a member other than a cable. For example, the towing member may include a chain, a rod, a hook, and the like. For example, the configuration of the towing member may be changed according to design specifications.

[0066] In the above-described embodiment, the manual unlocking device is described as further including a slider mechanism to which the cable is fixed and which supports the cable movably in a direction along a linear motion, but is not limited thereto. The manual unlocking device does not need to include a slider mechanism. For example, the manual unlocking device may be configured to pull the cable without using a slider mechanism. For example, the installation mode of the slider mechanism can be changed according to the design specifications.

[0067] In the above-described embodiment, the other end of the second link is connected to the slider mechanism, but the present invention is not limited thereto. For example, the other end of the second link does not have to be connected to the slider mechanism. For example, the other end of the second link may be connected to a cable without the slider mechanism. For example, the connection mode of the other end of the second link can be changed according to the design specifications.

[0068] In the above-described embodiment, the operating member is rotatable about the pivot shaft by 90 degrees between the locked position and the unlocked position, but the present invention is not limited to this. For example, the operating member may be rotatable about the pivot shaft by less than 90 degrees or more than 90 degrees between the locked position and the unlocked position. For example, the rotation angle of the operating member about the pivot shaft between the locked position and the unlocked position can be changed according to the design specifications.

[0069] In the above-mentioned embodiment, the manual unlocking device is described as further including a gear mechanism that reduces the rotation of the support shaft at a predetermined reduction ratio and transmits the reduced rotation to one end of the first link, but the present invention is not limited to this. For example, the manual unlocking device does not need to include a gear mechanism. For example, the manual unlocking device may include a belt pulley mechanism, a mechanism including a chain, or the like, instead of the gear mechanism. For example, one end of the first link may be connected to the operating member so as to be rotatable around the connecting portion with the operating member. For example, the installation mode of the gear mechanism can be changed according to the design specifications.

[0070] In the above-described embodiment, the gear mechanism includes a drive gear whose rotation center is rotatably connected to the support shaft, and a driven gear whose rotation center is connected to one end of the first link and meshes with the drive gear to transmit the rotational motion of the operating member to the first link, and the drive gear has a gear portion that meshes with the driven gear and a positioning portion that positions the position of the drive gear when the operating member is located at the locking position and the unlocking position. However, the present invention is not limited to this. For example, the drive gear may be configured to have a gear portion and not to have a positioning portion. For example, the configuration of the drive gear can be changed according to the design specifications.

[0071] In the above-described embodiment, the gear portion and the positioning portion are arranged at different positions on the circumference of a virtual circle centered on the spindle that is the rotation center of the drive gear, but this is not limited to the above. For example, the gear portion and the positioning portion do not have to be arranged at different positions on the circumference of a virtual circle centered on the spindle that is the rotation center of the drive gear. For example, the gear portion and the positioning portion may be arranged on the circumference of virtual circles having different diameters centered on the spindle that is the rotation center of the drive gear. For example, the arrangement of the gear portion and the positioning portion can be changed according to the design specifications.

[0072] In the above-described embodiment, the cable, which is the pulling member, is configured to be movable between a starting end and an ending end in a direction along the linear motion, and the manual unlocking device further includes a limiting wall that contacts the drive gear and limits the rotational motion of the drive gear before the cable moves in the direction along the linear motion and reaches the starting end or the ending end, but this is not limited to the above. For example, the manual unlocking device does not need to include a limiting wall. For example, the installation mode of the limiting wall can be changed according to the design specifications.

[0073] In the above-described embodiment, the first link is configured to be rotatable around the first axis parallel to the support shaft at the connection portion between one end of the first link and the operating member, and the first axis is disposed at a position that does not overlap with the rotation trajectory of the second link when viewed from the direction along the first axis. However, the present invention is not limited to this. For example, the first axis may be disposed at a position that overlaps with the rotation trajectory of the second link when viewed from the direction along the first axis. For example, the arrangement of the first axis can be changed according to the design specifications.

[0074] <Second embodiment> The manual unlocking device 201 according to the second embodiment will be described below. In the following description, parts having the same functions as those described in the first embodiment will be given the same names and symbols, and specific descriptions of the functions will be omitted.

[0075] Fig. 6 is a perspective view of the manual unlocking device 201 of the second embodiment in a locked state. Fig. 7 is a front view of the manual unlocking device 201 of the second embodiment in a locked state. Fig. 8 is a front view of the manual unlocking device 201 of the second embodiment in the middle of operation. Fig. 9 is a front view of the manual unlocking device 201 of the second embodiment in an unlocked state. 6 to 9, the manual unlocking device 201 includes an operating member 2, a conversion mechanism 203, a pulling member 4, a slider mechanism 5, a transmission member 209, and a case 8. In each drawing, a part of the case 8 (for example, a cover) is not shown.

[0076] The operating member 2 is configured to be rotatable between a locked position (position shown in FIG. 7) and an unlocked position (position shown in FIG. 9) by manual operation. The operating member 2 is rotatable 90 degrees about a support shaft 20 between the locked position and the unlocked position. In the locked position, the operating member 2 extends in the vertical direction. In the unlocked position, the operating member 2 extends in the horizontal direction.

[0077] The conversion mechanism 203 converts the rotational motion of the operating member 2 into linear motion. The conversion mechanism 203 has a plurality of links 221, 222, 223 that are at dead center positions when the operating member 2 rotates from the locked position to the unlocked position. One end of each of the links 221, 222, 223 is connected to the operating member 2, and the other end is connected to the slider mechanism 5. The slider mechanism 5 and the conversion mechanism 203 constitute a so-called slider crank mechanism. The multiple links 221, 222, 223 include a first link 221 having one end rotatably connected around a connection portion with the operating member 2, a second link 222 having one end rotatably connected around a connection portion with the other end of the first link 221 and the other end rotatably connected around a connection portion with the case 8 (an example of a fixed point), and a third link 223 having one end rotatably connected around a connection portion with one end of the second link 222 and the other end rotatably connected around a connection portion with the slider mechanism 5.

[0078] The first link 221 is configured to be rotatable about a first shaft 225 parallel to the support shaft 20 at a connection portion between one end of the first link 221 and the operating member 2. In the locked position, the first link 221 extends from one end of the first link 221 to the other end toward the upper left of the figure (see FIG. 7). In the unlocked position, the first link 221 extends from one end of the first link 221 to the other end toward the upper left of the figure, at an inclination closer to horizontal than the position in FIG. 7 (see FIG. 9).

[0079] One end of the first link 221 supports a part of the transmission member 209 from both sides in the X direction, and the other end supports one end of the second link 222 and the third link 223 from both sides in the X direction. The first link 221 has a two-sided support structure. Note that the first link 221 is not limited to the above, and may have a one-sided support structure. The aspect of the first link 221 can be changed according to the design specifications.

[0080] The length from one end to the other end of the second link 222 is shorter than the length from one end to the other end of the first link 221. The second link 222 is configured to be rotatable around a second axis 226 parallel to the first axis 225 at a connection portion between one end of the second link 222 and the other end of the first link 221. The second link 222 is configured to be rotatable around a third axis 227 parallel to the second axis 226 at a connection portion between the other end of the second link 222 and the case 8. In the locked position, the second link 222 extends from one end to the other end of the second link 222 toward the upper left of the figure at an inclination closer to vertical than the first link 221 (see FIG. 7). In the unlocked position, the second link 222 extends vertically upward from one end to the other end of the second link 222.

[0081] The length from one end to the other end of the third link 223 is shorter than the length from one end to the other end of the second link 222. The third link 223 is configured to be rotatable around the second shaft 226 at a connecting portion between one end of the third link 223 and one end of the second link 222. The third link 223 is connected to the slider mechanism 5 at a connecting portion between the other end of the third link and the slider mechanism 5 so as to be rotatable around a fourth shaft 228 parallel to the third shaft 227. In the locked position, the third link 223 extends from one end of the third link 223 to the other end toward the lower left of the figure (at an inclination close to horizontal) (see FIG. 7). In the unlocked position, the third link 223 extends vertically downward from one end of the third link 223 to the other end (see FIG. 9).

[0082] One end of the pulling member 4 is connected to the conversion mechanism 203. The other end of the pulling member 4 is connected to the locking device 16. The pulling member 4 transmits the linear motion transmitted from the conversion mechanism 203 to the locking device 16 to unlock the door device 15. The pulling member 4 is configured to be movable between a starting point P1 and a terminal point P2 in synchronization with the slider 31 in a direction along the linear motion.

[0083] The slider mechanism 5 supports the pulling member 4 (e.g., an inner cable) so as to be movable in a direction along the linear motion. The other end of the pulling member 4 is fixed to the slider mechanism 5. The other end of the third link 223 is connected to the slider mechanism 5 so as to be rotatable about the connection portion thereof.

[0084] The slider mechanism 5 includes a slider 31 on which the fourth shaft 228 is provided, and a guide rail 32 extending along the vertical direction. The slider 31 is supported by the guide rail 32 so as to be movable along the guide rail 32. Note that the configuration of the slider mechanism 5 is not limited to the above and can be changed according to design specifications.

[0085] A pressing force (elastic force) by an elastic portion such as a spring acts on the slider 31 via the pulling member 4. Therefore, a force pulling the slider 31 together with the pulling member 4 in the vertically upward direction acts on the slider 31.

[0086] The transmission member 209 transmits the rotation of the spindle 20 to one end of the first link 221. The transmission member 209 includes a first transmission section 291 in which the spindle 20 is provided, a second transmission section 292 in which the first shaft 225 is provided, and a positioning section 42 that positions the position of the transmission member 209 when the operating member 2 is located at the locked position or the unlocked position.

[0087] The rotation center of the first transmission part 291 is connected to the operating member 2 via the support shaft 20. The second transmission part 292 is integrally connected to the first transmission part 291, and transmits the rotational motion of the operating member 2 to the first link 221.

[0088] One end of the second transmission part 292 overlaps with the support shaft 20 when viewed from the direction along the first shaft 225. The first shaft 225 is provided at the other end of the second transmission part 292. In the locked position, the second transmission part 292 extends from one end of the second transmission part 292 to the other end toward the right in the figure (see FIG. 7). In the unlocked position, the second transmission part 292 extends vertically upward from one end of the second transmission part 292 to the other end (see FIG. 9).

[0089] The positioning portion 42 is provided on the outer periphery of the first transmitting portion 291 of the transmitting member 209. The first transmitting portion 291 is formed with a first recess 43 for positioning the position of the transmitting member 209 when the operating member 2 is located at the locked position, and a second recess 44 for positioning the position of the transmitting member 209 when the operating member 2 is located at the unlocked position. The positioning portion 42 is configured to include wall portions that form the first recess 43 and the second recess 44 in the transmitting member 209.

[0090] For example, when the operating member 2 is located at the locked position, the convex portion 62 of the plunger 61 fits into the first concave portion 43 of the transmission member 209 (see FIG. 7). This allows the position of the transmission member 209 to be determined when the operating member 2 is located at the locked position.

[0091] On the other hand, when the operating member 2 is located at the unlocked position, the convex portion 62 of the plunger 61 fits into the second concave portion 44 of the transmission member 209 (see FIG. 9). This allows the position of the transmission member 209 to be determined when the operating member 2 is located at the unlocked position.

[0092] Hereinafter, an example of the door locking state and a manual unlocking operation will be described with reference to Figs. For example, in a normal state, such as when the vehicle is moving, the door 11 is in a fully closed position and is locked by a locking device 16 (see FIG. 1). For example, the door is locked when the vehicle is moving or when passengers cannot get on or off at the door on the opposite side to the platform.

[0093] In the locked state shown in Fig. 7, the cable (pulling member 4) is pulled vertically upward by a pressing force (elastic force) of an elastic part such as a spring (not shown). At this time, the slider 31 is pulled vertically upward together with the cable. The slider 31 is disposed at a position on the starting end P1 side in the direction along the linear motion of the cable.

[0094] 7 to 9, the operating member 2 is rotated in the direction of the arrow R. For example, the operating member 2 is rotated 90 degrees around the spindle 20 between the locked position and the unlocked position. In this case, the transmission member 209 connected to the spindle 20 rotates in the direction of the arrow R1.

[0095] By this rotation of the transmission member 209, the rotational motion of the operating member 2 is transmitted to the first link 221. Then, the second link 222 and the third link 223 rotate and move as shown in Figures 7 to 8 and 9. In the position shown in Figure 9, one ends of the second link 222 and the third link 223 are disposed vertically below the third shaft 227. In the position shown in Figure 9, the second shaft 226, the third shaft 227 and the fourth shaft 228 are disposed on the same vertical line.

[0096] The rotational movement of the third link 223 converts the rotational movement of the operating member 2 into linear motion directed vertically downward. Then, the slider 31 moves vertically downward along the guide rail 32. At this time, the cable is pulled vertically downward via the slider 31 against the pressing force of an elastic part such as a spring. As a result, the linear motion transmitted from the conversion mechanism 203 is transmitted to the locking device 16, and the door device 15 is unlocked.

[0097] When the operating member 2 rotates from the locked position to the unlocked position, it is at a dead point position where one end to the other end of the second link 222 and one end to the other end of the third link 223 are positioned on a straight line. In the unlocked position shown in Fig. 9, one end to the other end of the second link 222 and one end to the other end of the third link 223 are positioned on the same vertical line.

[0098] 9, the position of the transmission member 209 is determined by fitting the convex portion 62 of the plunger 61 into the second concave portion 44 of the transmission member 209. For example, the plunger 61 prevents the operation member 2 from returning to its original position (locked position) due to its own weight when the operation member 2 is in the unlocked position.

[0099] FIG. 10 is an explanatory diagram of a toggle mechanism of a manual unlocking device 201 according to the second embodiment. 10, the second link 222, the third link 223, and the slider 31 form a toggle mechanism. In the example shown in the figure, the third shaft 227 is a fixed point, the fourth shaft 228 moves in the vertical direction, the force applied to the second shaft 226 is F1, the cable pulling force is F2, and the slider movement direction is the Z direction. When viewed from the X direction, the distance between the centers of the second shaft 226 and the fourth shaft 228 is shorter than the distance between the centers of the second shaft 226 and the third shaft 227.

[0100] The angle (acute angle) formed by the center point of the third axis 227, the center point of the second axis 226, and the center point of the fourth axis 228 is divided into angle A1 and angle A2 by a perpendicular line dropping down from the slider operation direction (Z direction). The relational expression in this case is shown in the following formula (1).

[0101]

number

[0102] According to the above formula (1), as the unlocked position is approached, (A1 + A2) = 180 degrees approaches, so that a smaller force F1 is required to exert the cable pulling force F2. Since the force F1 (corresponding to the operating force of the operating member 2) decreases near the unlocked position where the cable pulling force F2 is at its maximum, the operation becomes easier.

[0103] As described above, in the manual unlocking device 201 according to this embodiment, the multiple links 221, 222, and 223 include the first link 221 having one end rotatably connected about a connection portion with the operating member 2, the second link 222 having one end rotatably connected about a connection portion with the other end of the first link 221 and the other end rotatably connected about a connection portion with the case 8, and the third link 223 having one end rotatably connected about a connection portion with one end of the second link 222 and the other end rotatably connected about a connection portion with the slider mechanism 5. When the operating member 2 rotates from the locked position to the unlocked position, the second link 222 and the third link 223 are in dead center positions on a straight line from one end to the other end.

[0104] According to this configuration, when the operating member 2 is operated to rotate to the unlocked position and the door device 15 is unlocked, the second link 222 and the third link 223 are in dead center positions, where they are on a straight line from one end to the other end. Therefore, even if an external force acts on the traction member 4 from the locking device 16 in the unlocked state, the operating member 2 can be held in the unlocked position without requiring electricity.

[0105] In the manual unlocking device 201 according to this embodiment, the operating member 2 is rotatable about the spindle 20 between the locked position and the unlocked position. The manual unlocking device 201 further includes a transmission member 209 that transmits the rotation of the spindle 20 to one end of the first link 221. According to this configuration, a gear mechanism (gear portion) is not required to transmit rotation, which contributes to improving strength and rigidity.

[0106] In the manual unlocking device 201 according to this embodiment, the length from one end to the other end of the third link 223 is shorter than the length from one end to the other end of the second link 222. According to this configuration, compared to a case where the length from one end to the other end of the third link 223 is longer than the length from one end to the other end of the second link 222, the third link 223 can more easily follow the rotation of the first link 221. Therefore, the operation of the operating member 2 becomes easier.

[0107] In the manual unlocking device 201 according to this embodiment, the second link 222, the third link 223 and the slider 31 form a toggle mechanism and satisfy the above formula (1). According to this configuration, by placing the links 222, 223 in a dead center position in the unlocked position, the advantage of increased holding force is maintained, while the cable pulling force can be exerted with a smaller operating force as the unlocked position, which is subject to a greater load, is approached.

[0108] <Other Modifications> The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0109] In the above-described embodiment, an example has been described in which the vehicle door includes a pair of doors that open and close the entrance and exit of a railroad car, but the present invention is not limited to this. For example, the vehicle door may be provided on a vehicle other than a railroad car. For example, the vehicle door may be configured as a single-sliding door.

[0110] In the above-mentioned second embodiment, an example has been described in which the other end of the second link is connected to the case so as to be rotatable about the connection part, but this is not limited thereto. For example, the other end of the second link may be connected to a fixed part other than the case, such as the vehicle body, so as to be rotatable about the connection part. The connection mode (fixed part) of the other end of the second link can be changed according to the design specifications.

[0111] In addition, the components in the above-described embodiment may be replaced with well-known components without departing from the spirit and scope of the present invention. Also, the above-described modified examples may be combined. Among the embodiments disclosed in this specification, those that are composed of multiple objects may be integrated, and conversely, those that are composed of one object may be divided into multiple objects. Regardless of whether they are integrated or not, it is sufficient that they are configured to achieve the object of the invention. Among the embodiments disclosed in this specification, those in which multiple functions are provided in a distributed manner may have some or all of the multiple functions integrated together, and conversely, those in which multiple functions are provided in a distributed manner may have some or all of the multiple functions integrated together. Regardless of whether the functions are integrated or distributed, it is sufficient that the configuration is such that the object of the invention can be achieved. [Explanation of symbols]

[0112] Reference Signs List 1,201...manual unlocking device, 2...operation member, 3,203...conversion mechanism, 4...traction member, 5...slider mechanism, 6...gear mechanism, 7...limiting wall, 10...entrance, 15...door device, 16...locking device, 20...support shaft, 21,221...first link, 22,222...second link, 25...first shaft, 40...driving gear, 41...gear portion, 42...positioning portion, 50...driven gear, 209...transmission member, 223...third link, P1...starting end, P2...end end

Claims

1. A manual unlocking device for manually unlocking a locking device that locks a door device that opens and closes a vehicle entrance, comprising: an operating member that can be manually operated to rotate between a locked position and an unlocked position; a conversion mechanism for converting the rotational motion of the operating member into a linear motion; a traction member having one end connected to the conversion mechanism and the other end connected to the locking device, for transmitting the linear motion transmitted from the conversion mechanism to the locking device and unlocking the door device, The conversion mechanism has a plurality of links that are in a dead center position when the operating member rotates from the locked position to the unlocked position. Manual unlocking device.

2. the traction member is a cable; a slider mechanism to which the cable is fixed and which supports the cable movably in a direction along the linear motion; One end of each of the links is connected to the operation member, and the other end is connected to the slider mechanism. The manual unlocking device according to claim 1.

3. the plurality of links include a first link, one end of which is rotatably connected about a connection portion with the operating member, and a second link, one end of which is rotatably connected about a connection portion with the other end of the first link, and the other end of which is rotatably connected about a connection portion with the slider mechanism, When the operating member rotates from the locked position to the unlocked position, the first link and the second link are in a dead center position on a straight line from one end to the other end. The manual unlocking device according to claim 2.

4. The operating member is rotatable 90 degrees about a pivot between the locked position and the unlocked position, a gear mechanism that reduces the rotation of the support shaft at a predetermined reduction ratio and transmits the rotation to one end of the first link, The manual unlocking device according to claim 3.

5. The gear mechanism includes: A drive gear having a rotation center rotatably connected to the support shaft; a driven gear having a rotation center connected to one end of the first link and meshing with the drive gear to transmit the rotational motion of the operating member to the first link, The drive gear is A gear portion that meshes with the driven gear; a positioning portion that determines a position of the drive gear when the operating member is located at the locked position and the unlocked position, the gear portion and the positioning portion are disposed at different positions on the circumference of a virtual circle centered on the support shaft which is the center of rotation of the drive gear. The manual unlocking device according to claim 4.

6. The cable serving as the pulling member is configured to be movable between a starting end and an ending end in a direction along the linear motion, and a limiting wall that contacts the drive gear to limit the rotational movement of the drive gear before the cable reaches the starting end or the terminal end when the cable moves in the direction along the linear motion. The manual unlocking device according to claim 5.

7. The first link is configured to be rotatable around a first axis parallel to the support shaft at a connection portion between one end of the first link and the operating member, When viewed from a direction along the first axis, the first axis is disposed at a position not overlapping with a rotation trajectory of the second link. A manual unlocking device according to any one of claims 4 to 6.

8. the plurality of links include a first link, one end of which is connected rotatably about a connection portion with the operating member; a second link, one end of which is connected rotatably about a connection portion with the other end of the first link and the other end of which is connected rotatably about a connection portion with a fixed point; and a third link, one end of which is connected rotatably about a connection portion with the one end of the second link and the other end of which is connected rotatably about a connection portion with the slider mechanism, When the operating member rotates from the locked position to the unlocked position, the second link and the third link are in a dead center position, each of which is located on a straight line from one end to the other end. The manual unlocking device according to claim 2.

9. The operating member is rotatable about a support shaft between the locked position and the unlocked position, a transmission member that transmits the rotation of the support shaft to one end of the first link, The manual unlocking device according to claim 8.

10. A length from one end to the other end of the third link is shorter than a length from one end to the other end of the second link.

10. A manual unlocking device according to claim 8 or 9.

Images