JP2014177755A - Mechanical parking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanical parking device such that even when a plate-like tray having simple constitution is used, a connection cable never projects from the tray.SOLUTION: A projection part 8 of less than 20 mm in height is formed at outer peripheral parts of a tray 5 on both sides of an entry direction of a vehicle to be parked or at three outer peripheral parts not in the entry direction of the vehicle to be parked, an attention-attracting area 10 emphasized with a color is formed on an upper surface of the tray nearby the projection part 8, and a cut part 9 for drainage which is open from the center side of the tray 5 to the outside is formed at the projection part 8, thereby preventing a connection cable 16 from projecting from the outer peripheral part of the tray 5 owing to vibrations in movement of the tray 5.

Description

  The present invention relates to a mechanical parking apparatus capable of charging a battery in a parking state of an electric vehicle which is a parked vehicle.

  In a conventional mechanical parking apparatus, a configuration in which a battery of an electric vehicle is charged in a parking state in which a tray on which an electric vehicle that is a parked vehicle is mounted is stored in a storage space is known (for example, Patent Documents 1 to 4). See). In such a mechanical parking apparatus, a charging plug connecting portion is configured on a tray on which an electric vehicle is mounted, and on the other hand, a fixed contact portion on the power source side is arranged in a storage space where the tray is moved and stored. In the state where the electric vehicle is mounted on the tray, the driver or other user performs the work of connecting the power supply terminal connected to the battery to the plug connecting portion for charging, and then moves to the storage space. A charging circuit is formed by electrically connecting the above-described charging plug connecting portion and the fixed contact portion on the power source side at the tray stop position.

JP 2011-38334 A JP 2011-80260 A JP 2012-122254 A JP 2012-158955 A

  However, in the conventional mechanical parking device, the electric vehicle driver or the like performs the work of connecting the power supply terminal connected to the battery of the electric vehicle to the charging plug connecting portion configured on the tray, so that the battery and the power supply terminal are not connected. There is a risk that the connecting cables of the slab will be placed on the tray. In the tray structure as shown in Patent Documents 3 and 4, since the upright portions exist on both sides with respect to the approach direction of the parked vehicle even though it is substantially flat, the position of the connection cable is regulated by the upright portions. However, in the flat tray structure as shown in Patent Document 1, the position of the connection cable cannot be regulated because there is no upright portion described above, and the tray with the electric vehicle mounted is moved to the storage space. There is a risk that the position of the connection cable will gradually shift due to the vibration of the cable and protrude from the tray. If such a connection cable is cut by being pinched by a fixed part existing in the vicinity, a serious trouble occurs.

  An object of the present invention is to provide a mechanical parking device that prevents a connection cable from protruding from a tray even when a flat tray having a simple structure is used.

  In order to achieve the above object, the present invention has a substantially flat tray arranged in the approaching direction of a parked vehicle, constitutes a charging plug connecting portion on the tray, and is mounted on the tray. In a mechanical parking device that charges a battery while moving to a storage space and parked in a state where a power feeding terminal is connected to the charging plug connecting portion by a connection cable, both sides with respect to an approach direction of the parked vehicle in the tray A protrusion is formed on the outer periphery to prevent the connection cable from protruding from the outer periphery of the tray.

  According to such a configuration, the protruding portion can easily prevent the connecting cable from protruding from the outer peripheral portion of the tray due to vibration during movement of the tray, and even if a tray with a simple flat plate configuration is used. The electric system for receiving power from the battery while parking can be satisfactorily maintained. Therefore, although it was treated that the battery was charged using the parking state, it was possible to prevent a malfunction such as being uncharged due to poor contact, and further improving the reliability of the mechanical parking device. Can do.

  In the invention, it is preferable that the tray is formed in a substantially rectangular shape, and the protrusion is formed on a three-side outer peripheral portion excluding the approach direction of the parked vehicle in the tray.

  According to such a configuration, even in an electric vehicle in which the charging terminal of the battery is configured at various positions, the protruding portion causes the connection cable to protrude beyond the outer peripheral portion of the tray due to vibration during movement of the tray. Can be surely prevented.

  In the invention, it is preferable that the height of the protrusion is less than 20 mm.

  According to such a configuration, even when the work for charging is performed while walking on the upper surface of the tray, the height dimension of the protrusion is less than 20 mm in harmony with the normal barrier-free idea, and the worker's walking It is possible to improve work safety without adversely affecting the operation.

  Further, the present invention is characterized in that a warning area highlighted by color is formed on the upper surface of the tray located in the vicinity of the protrusion.

  According to such a configuration, a driver or other person who performs the connection work is conscious of the position of the connection cable by the alerting area, and arranges the connection cable at a position where the effect of the protrusion can be expected. The connection cable can be prevented from jumping out from the outer peripheral portion of the tray.

  Furthermore, the present invention is characterized in that a drainage cutout portion that is open from the center side of the tray toward the outside is formed in the protrusion.

  According to such a configuration, when the parked vehicle brings rainwater or snow, or when rainwater or snow falls from the parked vehicle located in the upper part, the protrusion provided on the outer periphery of the tray is present, so the tray It is conceivable that they are collected on the upper surface side of the water, but they are not discharged and collected from the drainage cut-out portion formed on the protrusion. Moreover, since the water draining cutout portion can be formed in a desired position in advance, it should be actively discharged from the same portion, preventing it from being discharged to an unpredictable position or an undesired electrical system position, New problems can be prevented.

  According to the mechanical parking apparatus according to the present invention, the protruding portion can prevent the connection cable from protruding from the outer peripheral portion of the tray due to vibration during movement of the tray. However, it is possible to satisfactorily maintain an electric system that receives power from the battery while parking. Therefore, although it was treated that the battery was charged using the parking state, it was possible to prevent a malfunction such as being uncharged due to poor contact, and further improving the reliability of the mechanical parking device. Can do.

It is a top view which shows the principal part of the mechanical parking apparatus by one embodiment of this invention. It is a top view of the tray shown in FIG. FIG. 3 is a side view of the tray shown in FIG. 2. FIG. 3 is an enlarged view of a charging plug connecting portion shown in FIG. 2. It is a front view of the plug connection part for charge shown in FIG. It is a top view of the state which mounted the parked vehicle on the tray shown in FIG. It is a front view which shows the principal part of the mechanical parking apparatus by other embodiment of this invention. It is a side view which shows the principal part of the mechanical parking apparatus shown in FIG.

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

  FIG. 1 is a plan view showing a mechanical parking apparatus according to an embodiment of the present invention.

  In general, a building 1 constituting a mechanical parking device is formed with a floor having an entrance of a parked vehicle and a storage floor 2 having a space for storing the parked vehicle, and an elevator device is provided between the two floors. 3 is in contact. A plurality of storage spaces 4A to 4N are formed on the storage floor 2, and the storage spaces 4A and 4B are used for charging an electric vehicle.

  The parked vehicle that has entered from the doorway is mounted on the tray and is moved to the storage floor 2 using the lifting device 3. All trays may have the same configuration for electric vehicles, or a dedicated electric vehicle may be prepared according to the number of storage spaces 4A and 4B. When the battery is charged while the parked vehicle is parked with an electric vehicle, the tray on which the electric vehicle is mounted is moved to the storage spaces 4A and 4B. On the other hand, when the parked vehicle does not charge the battery, the tray on which the parked vehicle is mounted is moved to the other storage spaces 4C to 4N. In any case, if there is a storage tray on which a parked vehicle is already mounted on the storage floor 2 by a control device or drive device (not shown), each tray is moved sequentially while using an empty space, The tray carried in is efficiently configured to move to a predetermined position.

  FIG. 2 is a plan view of the tray 5 used when the battery is charged during parking.

  The tray 5 is formed in a flat rectangular shape, and a charging plug connecting portion 7 is formed on the back side with respect to the approach direction of the parked vehicle indicated by the arrow 6. Further, on the upper surface side of the tray 5, protrusions 8 for preventing a connection cable from jumping out, which will be described later, are fixed to both sides and the back part of the approach direction except for the entrance part of the parked vehicle. The protrusion 8 is made of a round steel having an outer diameter of less than 20 mm, preferably a round steel having an outer diameter of 15 mm or more and less than 20 mm, and is welded to the surface of the tray 5. The protrusion 8 can be formed of various shapes, heights, and materials. In any case, the structure for the protrusion 8 is fixed to the surface of the tray 5.

  Further, the protrusions 8 provided on the three sides of the tray 5 do not extend continuously, but drainage cutout portions 9 that can be drained by flowing rainwater or the like from the center of the tray 5 toward the outside. have. Furthermore, in the vicinity of the upper surface of the tray 5 to which the protrusions 8 are welded, a warning area 10 colored in yellow is formed in order to alert the jumping of a connecting cable to be arranged later. For example, the attention calling area 10 is formed to have a width of about 5 cm from the outer peripheral edge of the tray 5, and the protrusion 8 described above is positioned within the width of about 5 cm.

  FIG. 3 is a side view of the tray 5 described above.

  As described above, the charging plug connecting portion 7 is disposed on the upper portion of the tray 5 and the protruding portion 8 having the drainage cutout portion 9 is welded. On the other hand, at the bottom of the tray 5 are rollers or wheels 11 used when moving the tray 5 in the longitudinal direction, and rollers or wheels 12 used when moving the tray 5 in a direction perpendicular to the longitudinal direction. A tray side contact 14 electrically connected to the plug connecting portion 7 for charging using a connection line 13 is disposed.

  Although detailed illustration is omitted, there are at least two electrical points between the connection cable that connects one end to the power supply plug of the electric vehicle to be mounted on the tray 5 and the power source in the building 1. The connection part is configured. One of them is an electrical connection portion between the connection cable and the charging plug connection portion 7, which is connected by an operator such as a driver when a parked vehicle is mounted on the tray 5. . The other one is a tray-side contact 14 configured at the bottom of the tray 5 and storage spaces 4A, 4B at positions corresponding to the tray-side contact 14 when the tray 5 is moved and stored in the storage spaces 4A, 4B. It is the electrical contact part formed with the storage part fixed contact configured on the side.

  After the former electrical connection portion using the charging plug connection portion 7 is completed, when the tray 5 is moved and stored in the storage spaces 4A and 4B, the tray side contact 14 is mechanically changed depending on the position of the tray 5. And the contact with the storage unit fixed contact are completed, and the battery of the electric vehicle is connected to the power source of the building 1.

  The protrusion 8 described above is arranged on the three-side outer peripheral portion excluding the entrance portion of the parked vehicle and has a U-shape as a whole, but the tray 5 is at least one place in the middle, preferably a plurality of places. A drainage cutout portion 9 is formed which can be drained by flowing rainwater or the like from the center portion toward the outside. The position where the drainage cutout portion 9 is formed is such that rainwater or the like discharged from the same portion does not drop on the tray side contactor 14 or other electrical connection portions and cause electrical or other troubles. A position like this is selected.

  4 and 5 are an enlarged side view and front view of the above-described charging plug connecting portion 7.

  The plug connecting portion 7 for charging has a protective cover 17 that opens and closes in parallel with the intrusion direction of the electric vehicle. A protective cover 17 is attached to the fixed base 18 of the charging plug connection 7 using a hinge 19 so as to be opened and closed. The protective cover 17 may be made of transparent plastic or may be opaque, and may be emphasized by a mark or character display on the charging connection portion that is easily understood by the user. The protective cover 17 on the opposite side of the hinge 19 has a protective cover 17 even when a grip 20 used for opening and closing and a vehicle-side charging plug 21 attached to a connection cable 16 extending from the electric vehicle side are connected. And a cutout portion 22 in which a part of the protective cover 17 is cut out.

  Further, one end of a mounting member 23 that is shaped like a spring so as to have a spring action is fixed to the fixed base 18 in the protective cover 17, and the charging plug connecting portion 7 is attached to the other end of the mounting member 23. The charging plug connection portion 7 has an insertion opening facing obliquely upward so that the vehicle-side charging plug 21 extended from the electric vehicle side can be inserted from the oblique upper portion.

  In this way, the charging plug connection portion 7 having a configuration in which the insertion port is directed upward can easily perform the connection work with the vehicle-side charging plug 21 while using the spring action of the mounting member 23. In addition, since the charging plug connection portion 7 is covered with a protective cover 17 that can be opened and closed, raindrops and dust do not adhere to the electrical connection portion even when the insertion port is directed upward. Cause no negative impact on public contact.

  Next, a case where the battery is charged while an electric vehicle is parked as a parked vehicle will be described.

  As is generally known, this type of mechanical parking device has a storage device 4A to 4N shown in FIG. 1 and a drive device and guide rails arranged on the floor side of the lift device, and the tray 5 is located. When the storage space driving device is driven, the tray 5 can be moved to any adjacent storage space side by rollers or wheels 11 and 12 rolling on the guide rail.

  In the mechanical parking apparatus, all the trays 5 may be configured for charging an electric vehicle, or only a plurality of them may be configured for charging an electric vehicle. In the latter case, the clerk or the driver of the parked vehicle 15 selects the use of charging the battery while parking by operating the operation button or the like. By this selection, the tray 5 dedicated to the electric vehicle is called. When the parked vehicle 15 is mounted on the tray 5 as shown in FIG. 6, the charging plug connecting portion 7 is located behind the parked vehicle 15. Although it differs depending on the type of electric vehicle, a connection cable 16 that can be connected to one end of the battery is stored, and one end of the connection cable 16 is taken out and connected to the power supply plug, and connected to the end of the connection cable 16. The vehicle-side charging plug 21 is connected to the charging plug connecting portion 7.

  At this time, since the vicinity of the protrusion 8 is emphasized by the attention calling area 10, an operator such as a driver who performs the connection work for charging the battery pays attention to the position of the connection cable 16. As a result, the connection cable 16 can be arranged so as not to easily jump out from the outer peripheral portion of the tray 5.

  In order to urge further attention by the warning area 10, during connection work using the connection cable 16, the connection cable 16 is urged to be positioned so as not to protrude from the outer periphery of the tray 5 by display or sound. It is also possible to have the cable 16 positioned inside the alert area 10 highlighted in yellow.

  The connection work to the charging plug connecting portion 7 will be described in more detail. The worker goes out of the vehicle and grips the protective cover 17 of the charging plug connecting portion 7 located on the back side of the tray 5. 20 to open. Since the protective cover 17 is configured to open in a direction parallel to the direction in which the electric vehicle is placed on the tray 5, the protective cover 17 does not come into contact with the electric vehicle or obstruct the degree of opening.

  Before and after the opening operation of the protective cover 17, the worker extends the connection cable 16 connected to the power supply terminal of the electric vehicle, and then inserts the vehicle-side charging plug 21 at the tip of the connection cable 16 into the insertion port of the charging plug connection portion 7. Plug in. When this insertion is completed, the electrical connection between the two is completed. Since this connection work is performed before the tray 5 is stored in the storage spaces 4A and 4B, the charging plug connection portion 7 is not yet in contact with the power source of the building 1. Therefore, anyone can work safely.

  The work at this time is performed while an operator such as a driver walks on the upper surface of the tray 5. Although the protrusion 8 is present on the upper surface of the tray 5, the height of the protrusion 8 is less than 20 mm in harmony with the normal barrier-free concept, which adversely affects the driver's walking. It is done safely.

  After completing the connection between the charging plug connection portion 7 and the vehicle side charging plug 21, the operator closes the protective cover 17 using the grip portion 20. Since the notch 22 is formed in the protective cover 17 at a position corresponding to the connection cable 16, the protection cover 17 can be closed corresponding to the notch 22 even if the connection cable 16 is present. Therefore, even if the battery is charged while the electric vehicle is parked for a long time, raindrops and dust do not adhere to the contact portion between the vehicle-side charging plug 21 and the charging plug connecting portion 7, and It is possible to maintain a good connection state.

  In addition, when the parked vehicle brings rainwater or snow, or when rainwater or snow falls from the parked vehicle located in the upper part, there is a protrusion 8 provided on the outer periphery of the tray 5, so the upper surface side of the tray 5 It is possible that they will accumulate. However, as described with reference to FIGS. 2 and 3, the drainage cutout portion 9 is provided, so that the drainage portion 9 is not discharged and collected. And since the position which forms the cut-out part 9 for draining is previously determined and it discharges | emits positively from the part, it can prevent discharging to the position which cannot be estimated. That is, the positions of the two existing in a vertical relationship are shifted so that the drainage cutout portion 9 is not formed at a position that guides rainwater or the like to the tray side contactor 14 shown in FIG. be able to. In this way, rainwater and snow are not guided to a position where rainwater or snow is not desired, for example, the tray side contactor 14 shown in FIG. 3 or other electrical contact portions, so that the electrical contact portions are always kept in good condition. can do.

  After the connection between the charging plug connecting portion 7 and the vehicle side charging plug 21 is completed, if an operation for storing the tray 5 in a predetermined position is performed from the operation portion, the mechanical parking device is activated, and this tray 5 is moved to the specific storage spaces 4A and 4B shown in FIG. At this time, the tray 5 moves while receiving vibration from the driving device, and the connection cable 16 located on the tray 5 is also subjected to vibration. However, since the protruding portion 8 is formed on the outer peripheral portion of the tray 5, the vibration prevents the connection cable 16 from jumping out of the tray 5. Therefore, while using the flat tray 5 having a simple configuration, the connection cable 16 is displaced due to vibration during movement of the tray 5 and is severely troubled by being pinched by a fixed portion existing nearby. Occurrence can be prevented.

  When the tray 5 moves to a predetermined stop position of the storage spaces 4A and 4B shown in FIG. 1, the tray side contactor 14 comes into contact with the fixed side contactor forming a pair. The contact portion between the tray-side contact 14 and the fixed-side contact is the contact between the charging plug connecting portion 7 and the vehicle-side charging plug 21 that has already been completed before moving to the storage spaces 4A and 4B. The battery is connected in series to the power source and connected to the power source of the building 1 to form a charging circuit. Therefore, when the tray 5 is stored in the storage spaces 4A and 4B, the electric vehicle is in a charged state while being parked.

  7 and 8 are a front view and a side view showing a main part of a mechanical parking apparatus according to another embodiment of the present invention.

  In this embodiment, the configuration of the charging plug connection portion 7 is different from that of the previous embodiment, and the charging plug connection portion 7 is configured at a position slightly higher than the tray 5. A support column 24 having a fixed lower portion is established at the back rear portion of the tray 5, and a charging plug connection unit 7 is formed on the upper portion of the support column 24. In addition, a charging circuit control box holding part 26 is attached to a portion of the column 24 positioned below the charging plug connecting part 7, and a connection cable holding part 27 for holding the middle of the connection cable 16 is further attached below the charging circuit control box holding part 26. Yes. The tray 5 has a protruding portion 8 welded to the outer periphery of the three sides excluding the entrance portion of the parked vehicle, and this is the same configuration as the previous embodiment.

  When charging the battery while parking, a driver or other operator takes out the connection cable 16 from his / her electric vehicle, connects one end of the connection cable 16 to the battery terminal, and connects the other end of the connection cable 16 to the other end. The provided vehicle-side charging plug 21 is connected to the charging plug connecting portion 7. At this time, the driver stores and holds the charging circuit control box 25 provided in the middle of the connection cable 16 in the charging circuit control box holding portion 26, and holds the connection cable 16 in the lower part of the connection cable 16. Engage with part 27 to hold.

  As described above, the charging plug connecting portion 7 is configured at a higher position than in the previous embodiment. Therefore, when the driver connects the connecting cable 16 to charge the battery of the electric vehicle, the charging plug connecting portion 7 is extremely bent. You will be able to do it in a comfortable position instead of sitting down.

  On the other hand, since the charging plug connecting portion 7 is configured at a higher position than in the previous embodiment, the portion of the connecting cable 16 positioned below the vehicle-side charging plug 21 is moved by a corresponding amount when the tray 5 is moved. However, since the middle portion of the connection cable 16 is held by the charging circuit control box holding portion 26 and the connection cable holding portion 27, it may be greatly touched by the vibration during movement of the tray 5, or the tray 5 may be touched. It does not jump out from the outer periphery of the. Further, a part of the connection cable 16 located closer to the electric vehicle than the connection cable holding part 27 is located on the upper surface of the tray 5, but the outer peripheral part of the same part is the same as in the previous embodiment. Similarly, a protrusion 8 is provided, and the protrusion 8 is regulated so as not to jump out of the tray 5.

  In each of the above-described embodiments, the protrusions 8 are formed on the outer periphery of the three sides excluding the entry portion of the parked vehicle in the tray 5, but the connection cable 16 is often arranged on the side of the parked vehicle. If it considers, the protrusion part 8 should just be formed in the outer peripheral part of both sides with respect to the approach direction of the parked vehicle in the tray 5. FIG.

  Moreover, in the mechanical parking apparatus in embodiment mentioned above, it owns the connection cable 16 which electrically connected the battery of the electric vehicle side, and one end, and charges the plug 21 for vehicle side charging attached to the other end of the connection cable 16 Although the electric vehicle is described as being connected to the plug connecting portion 7, the electric vehicle has only a terminal connected to the battery, and the charging plug 18 extended from the charging plug connecting portion 7 is provided on the electric vehicle side. The present invention can be similarly applied to a configuration in which the power supply plug is connected to the power supply plug.

  As described above, according to the mechanical parking apparatus of the present invention, since the protrusions 8 are formed on the outer peripheral portions on both sides with respect to the approach direction of the parked vehicle in the tray 5, the connection cable 16 is caused by vibration during movement of the tray 5. The protrusion 8 can easily prevent the protrusion 5 from protruding from the outer periphery of the tray 5, and even when the tray 5 having a simple flat plate configuration is used, the electric system for receiving the battery while parking is in a good state. Can be kept in. Therefore, although it is treated that the battery is charged using the parking state, it is possible to prevent a problem that the battery is not charged, and the reliability of the mechanical parking apparatus can be further improved.

  Further, according to the mechanical parking apparatus of the present invention, since the protruding portion 8 is formed on the three-side outer peripheral portion excluding the entering direction of the parked vehicle in the tray 5, the battery charging terminal is an electric potential vehicle configured at various positions. However, the protrusion 8 can reliably prevent the connection cable 16 from protruding beyond the outer peripheral portion of the tray 5 due to vibration during movement of the tray 5.

  Further, according to the mechanical parking device of the present invention, since the height of the protrusion 8 is less than 20 mm, even when charging work is performed while walking on the upper surface of the tray 5, it is in harmony with the normal barrier-free idea. Thus, the height of the protrusion 8 is less than 20 mm, which can be performed safely without adversely affecting the driver's walking.

  Moreover, according to the mechanical parking apparatus of the present invention, the protrusion 8 provided on the outer peripheral portion of the tray 5 and the alert area 10 highlighted in color on the upper surface of the tray located in the vicinity of the protrusion 8 are formed. An operator such as a driver works while paying attention to the position of the connection cable 16 in the alert area 10, and prompts the user to place the connection cable 16 at a position where the effect of the protrusion 8 can be expected. Thus, the connection cable 16 can be prevented from jumping out from the outer peripheral portion 5.

  In addition, although the Example has shown the example which provided the alerting area | region 10 in 3 directions, it cannot be overemphasized that you may provide in 4 directions including the boarding side.

  Furthermore, according to the mechanical parking apparatus of the present invention, when the parked vehicle brings rainwater or snow, or when rainwater or snow falls from the parked vehicle located in the upper part, the protrusion 8 provided on the outer peripheral portion of the tray 5. However, it is conceivable that they are accumulated on the upper surface side of the tray 5, but the protrusion 8 is formed with a draining cutout portion 9 that opens from the center side of the tray 5 to the outside. For this reason, it is not easily discharged and collected from the draining cutout portion 9 formed on the protrusion 8. In addition, since the drainage cut-out portion 9 can be formed in a desired position in advance, it is positively discharged from the same portion to prevent discharge to an unpredictable position or an undesired electrical system position. New problems can be prevented from occurring.

5 Tray 7 Charging plug connection 8 Protrusion 9 Drain cut-out 10 Warning area 16 Connection cable

Claims (5)

It has a substantially flat tray arranged in the approach direction of the parked vehicle, constitutes a plug connecting portion for charging on the tray, and connects the power feeding terminal of the parked vehicle mounted on the tray with the plug for charging by a connection cable. In the mechanical parking device that charges the battery while moving to the storage space and parking while connected to the unit,
A mechanical parking apparatus, wherein protrusions for preventing the connection cable from protruding from the outer peripheral portion of the tray are formed on both outer peripheral portions of the tray with respect to the approach direction of the parked vehicle.   2. The mechanical parking device according to claim 1, wherein the tray is formed in a substantially quadrangular shape, and the protrusion is formed on a three-side outer peripheral portion of the tray excluding an approach direction of the parked vehicle.   The mechanical parking device according to claim 1, wherein the protrusion has a height of less than 20 mm.   2. The mechanical parking device according to claim 1, wherein a warning area highlighted with a color is formed on the upper surface of the tray located in the vicinity of the protrusion.   2. The mechanical parking device according to claim 1, wherein a drainage cutout portion that is opened outward from the center side of the tray is formed on the protrusion.

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