Lock mechanism

Abstract

To provide a lock mechanism which enables reduction of a time for checking a lock state of a door part.SOLUTION: A lock mechanism according to one embodiment of the invention is a lock mechanism of a door part which covers an opening of a storage device having a storage space for storing an electric device. The lock mechanism includes: a first lock part and a second lock part which are provided at the door part and can switch a state of the lock mechanism between a lock state in which the first lock part and the second lock part hinder the door part from turning from a closed state to an open state and an unlock state in which the first lock part and the second lock part do not hinder the door part from turning from the closed state to the open state; and a link mechanism configured to switch the second lock part from the unlock state to the lock state in conjunction with an operation of switching of the first lock part from the unlock state to the lock state.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a locking mechanism for a door portion that covers an opening of a housing device installed under the floor of a railway vehicle and houses various electrical devices.

Background Art

[0002] Conventionally, as a locking mechanism for a housing device installed under the floor of a railway vehicle and housing various electrical devices, for example, Patent Document 1 describes a control device box for a railway vehicle having an opening formed on one side surface, a locking portion formed on a lower portion of the opening, and an inspection cover that covers the opening, and the inspection cover has a plurality of claw pieces that are respectively rotated by a plurality of operating levers and locked to the locking portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, a plurality of operating levers for rotating a plurality of claw pieces are attached to the inspection cover which is the door portion, and conventionally, whether the inspection cover is locked or not has been visually confirmed by an operator. However, since the inspection covers of the housing devices that house various electrical devices are attached everywhere, there are many inspection points for visual confirmation, and there is a problem that a lot of working time is required, such as performing double-check to prevent forgetting to close.

[0005] In view of the above circumstances, an object of the present invention is to provide a locking mechanism capable of reducing the time for confirming the locked state of the door portion.

Means for Solving the Problems

[0006] To achieve the above object, a housing device according to an aspect of the present invention is a lock mechanism for a door portion that covers an opening of a housing device having a housing space for housing an electrical device, The lock mechanism includes a first lock portion, a second lock portion, and a link mechanism. The first lock portion is provided on the door portion and is capable of switching between a locked state that prevents the door portion from changing from the closed state to the open state and an unlocked state that does not prevent the door portion from changing from the closed state to the open state, respectively. The second lock portion is provided on the door portion and is capable of switching between a locked state that prevents the door portion from changing from the closed state to the open state and an unlocked state that does not prevent the door portion from changing from the closed state to the open state, respectively. The link mechanism is configured to switch the second lock portion from the unlocked state to the locked state along with an operation of switching the first lock portion from the unlocked state to the locked state.

[0007] In the link mechanism of the lock mechanism, when the door portion is locked by the first lock portion, the second lock portion is interlocked to further lock the door portion. Thereby, it is possible to confirm whether the first lock portion is locked only by checking the first lock portion. That is, when the first lock portion is locked, the second lock portion is always locked, so that the working time for an operator to confirm the locking of the door portion can be reduced.

[0008] The first lock portion includes a first stopper provided inside the door portion and having a first claw portion movable between a lock position engaged with the opening and an unlock position not engaged with the opening, and an operation portion provided outside the door portion and receiving an operation for moving the first claw portion between the lock position and the unlock position. The second lock portion may include a second stopper provided inside the door portion and having a second claw portion movable between a lock position engaged with the opening and an unlock position not engaged with the opening.

[0009] The link mechanism may include a first gear that rotates in conjunction with the operation unit, a shaft that engages with the first gear and transmits the rotation of the first gear, and a second gear that engages with the shaft at a position different from the first gear and transmits the rotation of the shaft to the second stopper.

[0010] When switching the first locking portion from the unlocked state to the locked state, the first locking portion may enter the locked state earlier than the second locking portion.

[0011] The second torque required to rotate the second stopper may be smaller than the first torque required to rotate the first stopper.

[0012] The storage device may be installed under the floor of a railway vehicle.

Advantages of the Invention

[0013] As described above, according to the present invention, the time for confirming the locked state of the door portion can be reduced.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0016] FIG. 1 is a perspective view of the storage device 1 of the present invention, FIG. 2 is a side view of the door portion 30 of the present invention. Further, FIG. 3 is a view of the door portion 30 of the present invention seen from above, FIG. 3 is a front view of the door portion 30 of the present invention in an unlocked state, and FIG. 5 is a front view of the door portion 30 of the present invention in a locked state. In the following figures, the X-axis, Y-axis, and Z-axis directions are three mutually perpendicular axis directions.

[0017] In the present embodiment, the storage device 1 is installed under the floor (not shown) of a railway vehicle. As shown in FIGS. 1 to 4, the storage device 1 has a storage portion 10, a door portion 30, and a lock mechanism 100. In the present embodiment, the length of the storage device 1 in the Y-axis direction is approximately 1 m, the length of the storage device 1 in the X-axis direction is approximately 0.7 m, and the length of the storage device 1 in the Z-axis direction is approximately 0.8 m in the form of a cube, but of course it is not limited to this.

[0018] In the present embodiment, the traveling direction of the railway vehicle is defined as the Y-axis direction, the vehicle width direction is defined as the X-axis direction, and the vehicle height direction is defined as the Z-axis direction.

[0019] There is a space under the floor (not shown) of the railway vehicle on the positive Z-axis side when viewed from the storage device 1, and the storage device 1 is attached to the floor under it. The storage device 1 is configured to be able to accommodate various electrical devices according to the type and car number of the railway vehicle. Also, in one vehicle, two storage devices 1 can be arranged in the X-axis direction. In the present embodiment, they are arranged in a direction such that the cylindrical portion 50 described later is not exposed, but of course it is not limited to this.

[0020] [Storage portion] In this embodiment, as shown in FIG. 1, the housing portion 10 includes an upper surface portion 21 parallel to the X-axis direction and the Y-axis direction, a bottom surface portion facing the upper surface portion 21 in the Z-axis direction, a plurality of side surface portions 22 and 23 provided between the upper surface portion 21 and the bottom surface portion and parallel to the X-axis direction and the Z-axis direction, and a front surface portion 24 and a rear surface portion 25 provided between the upper surface portion 21 and the bottom surface portion and parallel to the Y-axis direction and the Z-axis direction, and forms a housing space W for housing the electric device E. In this embodiment, the housing portion 10 is formed of iron, but of course it is not limited to this, and for example, it may be made of stainless steel (SUS), and is not limited to metal, and may be made of resin.

[0021] In this embodiment, the upper surface portion 21 and the bottom surface portion are rectangular with a short side in the X-axis direction and a long side in the Y-axis direction, but of course it is not limited to this, and it may be rectangular with a long side in the X-axis direction and a short side in the Y-axis direction, or may be square. Also in this embodiment, the thickness of the upper surface 210 in the Z-axis direction is approximately 1.6 mm and 2.3 mm, but of course it is not limited to this.

[0022] The upper surface portion 21 has suspension fittings 211 to 214 for attaching the housing device 1 under the floor of a railway vehicle on the positive Z-axis side. In this embodiment, the suspension fittings 211 to 214 are provided at the four corners of the rectangular upper surface portion 21 (see FIG. 1).

[0023] The plurality of side surface portions 22 and 23 are parallel to the XZ plane (second plane) orthogonal to the Y-axis direction and face each other, and form the side surfaces of the housing portion 10. The thickness of the plurality of side surface portions 22 and 23 in the Y-axis direction in this embodiment is approximately 1.6 mm, but of course it is not limited to this.

[0024] The front surface portion 24 is parallel to the YZ plane and has an opening 231 for performing maintenance work on the electric device E and the like (see FIG. 1). The front surface portion 24 is rectangular with a short side in the Z-axis direction and a long side in the Y-axis direction in this embodiment. Of course, it is not limited to this, and it may be rectangular with a long side in the Z-axis direction and a short side in the Y-axis direction, or may be square. The rear surface portion 25 has the same configuration as the front surface portion 24.

[0025] The opening 231 is provided on the positive Y-axis side, has a rectangular opening 231' when viewed from the X-axis direction, and is rectangular with a short side in the Z-axis direction and a long side in the Y-axis direction. Of course, it is not limited to this, and it may be rectangular with a long side in the Z-axis direction and a short side in the Y-axis direction, or it may be square.

[0026] The opening 231 further has a locking portion 231A parallel to the YZ plane on the accommodation space W side (see FIG. 2). The locking portion 231A restricts the movement of the closing tools 312, 322, and 332 described later in the positive X-axis direction when they are locked.

[0027] Also, the front surface portion 24 (opening 231) has a first elastic member D1 facing the door portion 30 (see FIG. 2). The first elastic member D1 is provided outside the accommodation space W in the front surface portion 24, and is a sealing material that ensures the waterproof and dustproof properties of the accommodation device 1 by fitting with a second elastic member D2 (described later) provided on the door portion 30 when the door portion 30 is closed.

[0028] The first elastic member D1 is annular, approximately rectangular cubic, and has a V-shaped recess with respect to the second elastic member D2. The first elastic member D1 is connected to the front surface portion 24 by an adhesive or the like. The first elastic member D1 is formed of packing, but of course it is not limited to this.

[0029] Also, the first elastic member D1 may be integrally formed as a single member (one piece) without joints, or may be joined by a plurality of elastic members.

[0030] The front surface portion 24 has a cylindrical portion 50 for passing a wiring for supplying power to the electrical device E from the X-axis direction (see FIG. 1). The number and hole size of the cylindrical portions 50 can be appropriately changed.

[0031] Further, the front portion 24 has a plurality of hinge portions 26 provided between the opening portion 231 and the cylindrical portion 50 and connected to the door portion 30. In the present embodiment, two hinge portions 26 are provided along the Y-axis direction, and the door portion 30 described later is configured to be rotatable about the center in the Y-axis direction. That is, the door portion 30 is opened in the positive direction of the Z-axis. Of course, it is not limited to this, and three or more hinge portions 26 may be provided.

[0032] [Door portion] The door portion 30 has a door surface 30A that covers the opening portion 231 (opening 231'), and a handle T that can be grasped by an operator when opening and closing the door portion 30.

[0033] The door surface 30A is rectangular when viewed from the X-axis direction and covers the opening portion 231, and is U-shaped when viewed from the Y-axis direction. The door surface 30A has a second elastic member D2 at a position facing the first elastic member D1 in the X-axis direction. The second elastic member D2 is annular like the first elastic member D1, is approximately a rectangular cube, and has a V-shaped concave portion with respect to the first elastic member D1. The second elastic member D2 is connected to the door surface 30A by an adhesive or the like. The second elastic member D2 is formed of packing, but of course it is not limited to this.

[0034] Further, the second elastic member D2 may be integrally formed as a single member (one piece) without joints, or may be joined by a plurality of elastic members.

[0035] Also, the second elastic member D2 is fitted into the concave portions of the first elastic member D1 alternately. Thereby, as described above, the waterproofness and dustproofness of the housing device 1 are ensured.

[0036] Also, in the U-shaped portion of the door surface 30A, the portion that supports the second elastic member D2 abuts on the first elastic member D1 when the door portion 30 is closed. Thereby, the waterproofness and dustproofness of the housing device 1 are further ensured.

[0037] [Lock mechanism] The locking mechanism 100 includes a first locking portion 31 and a second locking portion 32 that can be respectively switched between a locked state that prevents the door portion 30 from changing from the closed state to the open state and an unlocked state that does not prevent the door portion 30 from changing from the closed state to the open state, and a link mechanism 40 configured to switch the second locking portion 32 to the locked state in accordance with an operation of switching the first locking portion 31 from the unlocked state to the locked state.

[0038] (First to third locking portions) The first to third locking portions 31 to 33 include a first locking portion 31 provided on the door portion 30 and capable of locking the closed state of the door portion 30, a second locking portion 32 provided at a position different from the first locking portion 31 when viewed from the X-axis direction in the door portion 30 and capable of locking the closed state of the door portion 30, and a third locking portion 33 provided at a position different from the first locking portion 31 and the second locking portion 32 when viewed from the X-axis direction in the door portion 30 and capable of locking the closed state of the door portion 30. In the closed state (closed state) of the door portion 30, the closed state can be locked or the closed state can be unlocked to open the door portion 30.

[0039] The first locking portion 31 is provided on the accommodation space W side (inner side) of the door portion 30 so as to be rotatable about the X-axis. In a state of locking the door portion 30 (first locked state), it includes a first stopper 312 locked to the locking portion 231A of the opening 231, an operation portion 310 provided outside the accommodation space W of the door portion 30 and capable of being rotationally operated about the X-axis to lock the first stopper 312 to the locking portion 231A of the opening 231, and a first communication portion 311 that transmits the rotational operation by the operation portion 310 to the first stopper 312 and the first link unit 41. It is provided near the center when viewed from the X-axis direction. The first link unit 41 is composed of a first gear 411 and a second gear 412 described later.

[0040] The first stopper 312 is approximately rectangular, and by the operation of the operation part 310, it is locked facing the locking part 231A to put the door part 30 in the first locked state, or the door part 30 is unlocked (the first unlocked state) by not facing the locking part 231A. That is, the first stopper 312 includes a first claw part 312A that can move between a locked position engaged with the opening 231 and an unlocked position not engaged with the opening 231.

[0041] The operation part 310 is approximately L-shaped, has the first claw part 312A, and an operation is performed to move the first stopper 312 between the locked position and the unlocked position. The first claw part 312A is approximately rectangular, and by the operation of the operation part 310, it is locked facing the locking part 231A to put the door part 30 in the first locked state, or the door part 30 is unlocked (the first unlocked state) by not facing the locking part 231A.

[0042] Also, the first stopper 312 further has a first connection hole for connecting to the first communication part 311. Thereby, the rotation of the operation part 310 is transmitted to the first stopper 312.

[0043] In the present embodiment, the first lock part 31 is put in the first locked state by rotating the operation part 310 from a direction parallel to the positive direction of the Z axis to a direction parallel to the negative direction of the Y axis (counterclockwise), and the first unlocked state is set by rotating the operation part 310 in a direction parallel to the positive direction of the Z axis (clockwise). Of course, the rotation direction of the operation part 310 for locking and unlocking the door part 30 is not limited to this. Also, the operation of the operation part 310 is not limited to rotation and may be slid.

[0044] The second locking portion 32 is provided rotatable about the X-axis on the accommodation space W side (inner side) of the door portion 30, and in a state of locking the door portion 30 (second locking state), it has a second stopper 322 locked to the locking portion 231A of the opening 231, and a second support portion 321 provided on the door portion 30 to support the rotation of the second stopper 322 and the first gear 421 of the second link unit 42, and is provided on the right side when viewed from the X-axis direction.

[0045] The second stopper 322 is approximately rectangular in shape, has a second claw portion 322A, and is locked to face the locking portion 231A by the operation of the operation portion 310 to lock the door portion 30 in the second locking state, or is made to face away from the locking portion 231A to unlock the door portion 30 (second unlocking state). Specifically, in the second stopper 322, the operation of the operation portion 310 is transmitted to the second link unit 42 described later, and the rotation of the transmitted second link unit 42 is transmitted to the second stopper 322 to cause it to rotate. Thereby, as described above, the second locking state or the second unlocking state can be achieved.

[0046] The second stopper 322 further has a second connection hole (not shown, similar to the first connection hole) for rotatably connecting to the second support portion 321. Thereby, the second stopper 322 is supported by the second support portion 321.

[0047] The second support portion 321 has a transmission portion that is inserted through the second connection hole of the second stopper 322 and the rotation center (around the X-axis) of the second link unit 42 to transmit the rotation of the second link unit 42 to the second stopper 322.

[0048] In the present embodiment, the second locking portion 32 is brought into the second locking state in conjunction with the first locking portion 31 by rotating the operation portion 310 in a direction parallel to the negative direction of the Y-axis, and is brought into the second unlocking state in conjunction with the first locking portion 31 by rotating the operation portion 310 in a direction parallel to the positive direction of the Z-axis. Of course, the direction of rotation of the operation portion 310 for locking and unlocking the door portion 30 is not limited to this as described above.

[0049] The third locking portion 33 has the same configuration as the second locking portion 32, and is provided rotatably about the X-axis on the accommodation space W side (inner side) of the door portion 30. In a state of locking the door portion 30 (the third locked state), it has a third stopper 332 that is locked to the locking portion 231A of the opening 231, and a third support portion 331 that is provided on the door portion 30 and supports the rotation of the third stopper 332 and the first gear 431 of the third link unit 43, and is provided on the left side when viewed from the X-axis direction.

[0050] The third stopper 332 is approximately rectangular, has a third claw portion 332A, and is locked to face the locking portion 231A by the operation of the operation portion 310 to put the door portion 30 in the third locked state, or is made to face away from the locking portion 231A to put the door portion 30 in an unlocked state (the third unlocked state). Specifically, in the third stopper 332, the operation of the operation portion 310 is transmitted to the third link unit 43 described later, and the transmitted third link unit 43 rotates and the rotation is transmitted to the third stopper 332 to rotate. Thereby, as described above, the third locked state or the third unlocked state can be achieved.

[0051] The third stopper 332 further has a third connection hole (not shown, similar to the first connection hole) for rotatably connecting to the third support portion 331. Thereby, the third stopper 332 is supported by the third support portion 331.

[0052] The third support portion 331 has a transmission portion that is inserted through the third connection hole of the third stopper 332 and the rotation center (around the X-axis) of the third link unit 43 to transmit the rotation of the third link unit 43 to the third stopper 332.

[0053] In this embodiment, when the third locking portion 33 rotates the operation portion 310 in a direction parallel to the negative direction of the Y axis, it interlocks with the first locking portion 31 to enter the third locked state. When the operation portion 310 rotates in a direction parallel to the positive direction of the Z axis, it interlocks with the first locking portion 31 to enter the third unlocked state. Of course, the direction of rotation of the operation portion 310 for locking and unlocking the door portion 30 is not limited to this as described above.

[0054] (Link mechanism) The link mechanism 40 is provided on the door portion 30 to connect the first locking portion 31, the second locking portion 32, and the third locking portion 33, and when the closed state of the door portion 30 is locked by the first locking portion 31, the second locking portion 32 and the third locking portion 33 are interlocked to lock the closed state of the door portion 30.

[0055] The link mechanism 40 includes a first link unit 41 provided on the first locking portion 31 and rotating in conjunction with the operation portion 310, a second link unit 42 provided on the second locking portion 32 and rotating in conjunction with the operation portion 310, a third link unit 43 provided on the third locking portion 33 and rotating in conjunction with the operation portion 310, a shaft S having a rotation axis around the Y axis for transmitting the rotation of the first link unit 41 to the second link unit 42 and the third link unit 43, and shaft support portions 44A to 44C for supporting the shaft S.

[0056] The first link unit 41 includes a first gear 411 provided on the first locking portion 31 (the first connecting portion 311) and rotating around the X axis in conjunction with the rotation of the operation portion 310, and a second gear 412 inserted through the shaft S and engaged with the first gear 411, and when the first gear 411 rotates, it rotates around the Y axis together with the shaft S (the second link unit 42 and the third link unit 43).

[0057] The first gear 411 has a plurality of protrusions (teeth) that are rotationally symmetric about the rotation axis (about the X-axis) and are provided at equal intervals on the circumference, and the plurality of protrusions are engaged with the second gear 412. Thereby, the rotation of the first gear 411 can be transmitted to the second gear 412.

[0058] The second gear 412 has a plurality of protrusions (teeth) that are rotationally symmetric about the rotation axis (about the Y-axis) and are provided at equal intervals on the circumference, similar to the first gear 411, and the plurality of protrusions are engaged with the first gear 411. When the rotation of the first gear 411 is transmitted to the second gear 412, the shaft S rotates.

[0059] The second link unit 42 includes a first gear 421 provided on the second lock portion 32 (the second support portion 321) and rotating about the X-axis in conjunction with the rotation of the operation portion 310, and a second gear 422 inserted through the shaft S and engaged with the first gear 421, and the second gear 422 rotates about the Y-axis together with the shaft S when the shaft S is rotated by the operation portion 310.

[0060] The first gear 421 has a plurality of protrusions (teeth) that are rotationally symmetric about the rotation axis (about the X-axis) and are provided at equal intervals on the circumference, and the plurality of protrusions are engaged with the second gear 422. Thereby, the rotation of the second gear 422 is transmitted to the first gear 421 and rotates. Also, as described above, the rotation of the first gear 421 is transmitted to the second stopper 322 to set the second lock state or the second unlock state.

[0061] The second gear 422 has a plurality of protrusions (teeth) that are rotationally symmetric about the rotation axis (about the Y-axis) and are provided at equal intervals on the circumference, similar to the first gear 421, and the plurality of protrusions are engaged with the first gear 421. When the shaft S is rotated by the operation portion 310, the rotation is transmitted to the second gear 422, and the second gear 422 rotates.

[0062] The third link unit 43 has a first gear 431 provided on the third lock portion 33 (the third support portion 331) and rotating about the X-axis in conjunction with the rotation of the operation portion 310, and a second gear 432 inserted through the shaft S, engaged with the first gear 431, and rotating about the Y-axis together with the shaft S when the shaft S is rotated by the operation portion 310.

[0063] The first gear 431 has a plurality of protrusions (teeth) that are rotationally symmetric about the rotation axis (about the X-axis) and provided at equal intervals on the circumference, and the plurality of protrusions are engaged with the second gear 432. Thereby, the rotation of the second gear 432 is transmitted to the first gear 431 and rotates. Also, as described above, the rotation of the first gear 431 is transmitted to the third stopper 332 to set the third lock state or the third unlock state.

[0064] The second gear 432 has a plurality of protrusions (teeth) that are rotationally symmetric about the rotation axis (about the Y-axis) and provided at equal intervals on the circumference, similar to the second gear 431, and the plurality of protrusions are engaged with the first gear 431. When the shaft S is rotated by the operation portion 310, the rotation is transmitted to the second gear 432, and the second gear 432 rotates.

[0065] The shaft support portions 44A to 44C are provided on the door portion 30 and each have a through hole through which the shaft S passes. The shaft S passes through one end of the shaft S rotatably on the right side (the positive direction side of the Y-axis) of the second lock portion 32. Also, the shaft S passes through near the center of the shaft S rotatably on the left side (the negative direction side of the Y-axis) of the first lock portion 31. Also, the shaft S passes through the other end of the shaft S rotatably on the left side (the negative direction side of the Y-axis) of the third lock portion 33 (see FIG. 3).

[0066] Here, the first torque for rotating the operation unit 310 is greater than the second torque for rotating the second locking portion 32 and the third locking portion 33. That is, if the first locking state is set by the first stopper 312, the door portion 30 can be locked in the closed state, so there is no need to make the second torque equal to or greater than the first torque. Therefore, since the second torque can be made smaller than the first torque, the force used when operating by the operation unit 310 can be reduced.

[0067] Also, the first stopper 312 is configured to be locked before the second stopper 322 and the third stopper 332 are locked. That is, the position of the first stopper 312 in the first unlocked state is closer to the locking portion 231A than the second stopper 322 in the second unlocked state and the third stopper 332 in the third unlocked state. Thereby, when the first locking state is set by the operation unit 310, the locking state is achieved earlier than on both sides, so the force used when operating the operation unit 310 can be reduced compared to locking the first stopper 312 to the third stopper 332 simultaneously.

[0068] Also, not limited to this, for example, the first stopper 312 is formed larger than the second stopper 322 and the third stopper 332. That is, by making the first stopper 312 larger than the second stopper 322 and the third stopper 332, the first stopper 312 is locked to the locking portion 231A earlier than the second stopper 322 and the third stopper 332.

[0069] (Explanation of the operation of the locking mechanism)

[0070] First, in the initial state, as shown in FIG. 5, the first locking portion 31, the second locking portion 32, and the third locking portion 33 are in the unlocked state. Hereinafter, the operation of locking all the locking portions 31 to 33 will be described.

[0071] Next, as shown in FIG. 5, the case where all the locking portions 31 to 33 are in the locked state will be described. The first link unit 41 is rotated counterclockwise by the operation unit 310. At this time, the first stopper 312 is rotated counterclockwise and shifts to the first locked state. At this time, the first gear 411 rotates as the first link unit 41 rotates counterclockwise. Then, the rotation of the first gear 411 is transmitted to the second gear 412, and the second gear 412 rotates together with the shaft S around the Y axis.

[0072] Then, the rotation of the rotated shaft S is transmitted to the second gear 422, and the second gear 422 rotates around the Y axis. At this time, the rotation of the second gear 422 is transmitted to the first gear 421, the transmitted first gear 421 rotates, and the rotation is transmitted to the second stopper 322, and the second stopper 322 rotates to shift to the second locked state.

[0073] Also, the rotation of the rotated shaft S is transmitted to the second gear 432, and the second gear 432 rotates around the Y axis. At this time, the rotation of the second gear 432 is transmitted to the first gear 431, the transmitted first gear 431 rotates, and the rotation is transmitted to the third stopper 332, and the third stopper 332 rotates to shift to the third locked state.

[0074] As described above, when the link mechanism 40 locks the door portion 30 by the first to third locking portions 31 to 33, by locking the first locking portion 31, the second locking portion 32 and the third locking portion 33 are interlocked and locked. Thus, when an operator checks whether the door portion 30 is locked, it is sufficient to check, for example, the tilt adjustment of the operation unit 310 (in this embodiment, whether it is tilted to the negative direction side of the Y axis) of the locking mechanism 100. Therefore, the time for the operator to check the locked state of the door portion 30 can be reduced. Further, since it is not necessary to provide the mechanism of the operation unit 310 for the second locking portion 32 and the third locking portion 33, the working time required for opening and closing the door portion 30 can be reduced.

[0075] <Modification Example> Next, a modified example of the present invention will be described. In the present embodiment, the lock of the door portion 30 is confirmed by visually recognizing the inclination of the operation portion 310 of the door portion 30. Of course, the present invention is not limited to this, and a detection device detected using a sensor may be used. The configuration for detection is not particularly limited, and an optical switch such as a proximity switch or a photocoupler can be adopted.

[0076] As an example of the adoption of a proximity switch, for example, a reed switch provided at a position facing the first stopper 312 in the Z-axis direction in the first locking state in the opening 231 and a magnet provided at a position facing the reed switch in the first locking state in the first stopper 312 are respectively arranged. When the first stopper 312 rotates to the first locking state, the reed switch is configured to detect the locking state by sensing with the magnet (switch ON). Of course, the reed switch may be provided on the first stopper 312 and the magnet may be provided in the opening 231.

[0077] As an example of the adoption of an optical switch, for example, a light receiving element such as a phototransistor provided at a position facing the first stopper 312 in the Z-axis direction in the first locking state in the opening 231 and a light emitting element such as an LED provided at a position facing the phototransistor in the first locking state in the first stopper 312 are respectively arranged. When the first stopper 312 rotates to the first locking state, the light receiving element is configured to detect the locking state by receiving the light of the light emitting element (switch ON). Of course, the light receiving element may be provided on the first stopper 312 and the light emitting element may be provided in the opening 231.

[0078] When a proximity switch, an optical switch, or the like is switched ON, the detection device may be configured such that information indicating switch ON is transmitted to a display panel provided, for example, in the driver's seat of a train, either wired or wirelessly. Thereby, it is possible to confirm whether it is in the first locked state without leaving the driver's seat. Also, the detection device may be configured such that power is supplied from the outside by wiring, or the detection device may have a power source therein in advance.

[0079] The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments and can of course be variously modified, and the configurations of each embodiment and modification example may be combined. For example, in this embodiment, three locking portions are provided, but of course, it is not limited to this, and two may be provided, or four or more may be provided. In this embodiment, the storage device 1 installed under the floor of the railway vehicle has been described. However, for example, it may be provided in a railway vehicle floor device, an indoor / outdoor switchboard distribution box, an equipment room, or the like.

Explanation of Reference Numerals

[0080] 1... Storage device 30... Door portion 31... First locking portion 310... First operation portion 312A... First stopper 32... Second locking portion 322... Second stopper 33... Third locking portion 332... Third stopper 40... Link mechanism 41... First link unit 42... Second link unit 100... Locking mechanism E... Electrical equipment W... Storage space

Claims

1. A lock mechanism for a door that covers an opening of a storage device having a storage space for storing an electric device, The lock mechanism includes a first lock section and a second lock section that are provided on the door section and are switchable between a locked state that prevents the door section from changing from a closed state to an open state and an unlocked state that does not prevent the door section from changing from a closed state to an open state, and a link mechanism that switches the second lock section from the unlocked state to the locked state in response to an operation of switching the first lock section from the unlocked state to the locked state. Locking mechanism.

2. 2. The locking mechanism of claim 1, the first locking portion includes a first closing tool provided on the inside of the door portion and having a first claw portion movable between a locked position where the first claw portion engages with the opening and an unlocked position where the first claw portion does not engage with the opening, and an operating portion provided on the outside of the door portion and operated to move the first claw portion between the locked position and the unlocked position, The second locking portion has a second closing tool provided on the inside of the door portion and equipped with a second claw portion movable between a locked position where the second locking portion engages with the opening and an unlocked position where the second locking portion does not engage with the opening. Locking mechanism.

3. 3. The locking mechanism according to claim 2, The link mechanism includes a first gear that rotates together with the first closing tool in conjunction with the operating portion, a shaft that engages with the first gear and transmits the rotation of the first gear, and a second gear that engages with the shaft at a position different from that of the first gear and transmits the rotation of the shaft to the second closing tool. Locking mechanism.

4. 3. The locking mechanism according to claim 2, When switching the first lock unit from the unlocked state to the locked state, the first lock unit is set to the locked state before the second lock unit is set to the locked state. Locking mechanism.

5. 4. The locking mechanism according to claim 3, A second torque required to rotate the second closure is less than a first torque required to rotate the first closure. Locking mechanism.

6. 2. The locking mechanism of claim 1, The storage device is installed under the floor of a railway vehicle. Locking mechanism.

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