JPH01284678A - Rear door protecting device for multifloors parking facility - Google Patents

Abstract

PURPOSE:To improve safety by expecting the possibility of opening a rear door and preventing the movement of a pallet at the time of detecting a person twice or more at the back of a car after detecting a person to get out of the car having parked on the pallet. CONSTITUTION:The first detector PH2 detecting a person to get out of a car 3 having parked on a pallet 2 and the second detectors PHD1-PHD3 detecting a person between the back parking allowable limit position and the rearmost section of the car 3 are provided. When the second detectors PHD1-PHD3 detect twice or more after the first detector PH2 detects, the possibility of opening a rear door 4 is expected, the movement of the pallet 2 is prevented by a locking mechanism. When the third detector PHH located at the position higher than the roof of the car 3 detects the opening of the rear door 4, the movement of the pallet 2 is likewise prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rear door protection device for a multi-story parking facility in which vehicles are stored by circulating a large number of vehicle loading pallets.

(Conventional technology and its problems) When using this type of circulating multi-storey parking facility to avoid four vehicles with rear doors on the right, such as light vans and high-roof vehicles, due to space constraints, the first thing to do before loading and unloading luggage is Park the vehicle in the parking lot. After entering the warehouse, the driver listens to the rear door and unloads the cargo. At this time, if the luggage is once piled up outside the entrance/exit door of the parking facility, and the rear door is securely closed before the luggage is transported to the destination location, no additional installation problems will occur. However, if you leave the parking facility with your luggage in both hands while listening to the rear door and carry it to the destination, you may have to move the pallet while it is being carried to allow another vehicle to leave the parking lot. If this is done incorrectly, the fully open rear door may come into contact with the parking equipment during movement, causing accidents such as damage to the vehicle and parking equipment. 1. To prevent such accidents, In so-called horizontal multi-layer circulation parking equipment, when a vehicle is sent into the circulation section with the rear door fully open, a sensor detects the fully open state of the rear door and immediately stops the circulation operation. 3 However, in a single-car parking facility with 41 safety devices installed, a person must return to the parking lot in order to resume operation of the stopped parking facility. Because the restoration work requires entering the interior of the four-vehicle facility and carrying out multiple 18 operations, and this restoration work is dangerous, it usually requires specialized maintenance personnel, and the restoration work must be carried out until the maintenance personnel arrive. There is a problem in that the operating efficiency of parking equipment is reduced because it is not possible to do so.

Although the above description has been made for the case where the rear door is fully open, a similar accident may occur even when the rear door is only ajar. In other words, if you move pallet 1 to let another person's vehicle out with the rear door not fully closed, pallet 1
There is a risk that the rear door, which was left ajar, will be affected by the impact when ~ is moved, causing the same problem as above.

Therefore, in order to solve the above problems, a technique has been proposed to mechanically prevent the rear door from opening. For example, in Japanese Utility Model Application Publication No. 61-5954, a movable fence is provided on one side edge of the vehicle mounting 1 to ray, and this movable fence is moved appropriately to mechanically prevent the opening of the rear door. The above problem is solved.

However, it is difficult to put the above-mentioned device into practical use because the length of the vehicle (front and rear) and the position of the vehicle change, as well as the position of the rear door. Furthermore, even if it were to be put into practical use, it would require an Ic drive device to move the movable fence in response to vehicles entering and exiting the garage, which would make the device expensive.

(Object of the Invention) This invention was made to solve the above-mentioned problem, and it is possible to detect the fully open state of the rear door or the possibility that the rear door will be fully opened while the pallet is being moved by using the 41 configuration in the cylinder. J: An object of the present invention is to provide a rear door protection device for a multi-story parking facility, which can prevent damage accidents to parked vehicles and improve the efficiency of management and operation.

(Means for Achieving the Object) The invention of claim 1 is a rear door protection device for a multi-story parking facility in which vehicles are stored by circulating a large number of vehicle loading cages, which achieves the above object. In order to achieve this, a first detector is provided to detect when a person gets out of a vehicle parked at the pallet 1~ at the side parking permissible limit position at the entrance/exit, and a first detector for detecting a person getting off the vehicle parked in the pallet 1~ At least one step is provided between the rearmost part of the vehicle when the vehicle is parked so that the front part of the vehicle corresponds to the n capacity limit position and the rear parking permissible limit position of the pallet 1. A second detector for detecting a person is provided between the rearmost part of the vehicle and the rear parking permissible limit position, and after the first detector detects that the person gets out of the vehicle, the second detector detects the presence of a person. The first locking mechanism is configured to prevent the pallets 1 from moving when a person is detected at least 62 times.

In order to achieve the above object, the invention according to claim 2 roughly adds to the invention according to claim 1, and further includes a third detection method for detecting that the rear door of the vehicle is opened at a position higher than the roof of the vehicle. The second lock mechanism is configured to prevent movement of the pallet while the third detector detects that the rear door is opened.

The invention according to claim 3 is a rear door protection device for a multilevel parking facility in which vehicles are stored by circulating a large number of vehicle mounting cages, and in order to achieve the distribution efficiency, A first detector detects when a person gets off the vehicle parked on the pallet at a four-car permissible limit position on the side of the pallet 1-, and a second detector detects the passage of a person at the entrance/exit. A first locking mechanism measures the time from when the first detector detects a person getting off the vehicle until the second detector detects the person passing; [If the time is longer than a predetermined value]
It is configured to prevent the movement of ~.

In order to achieve the above-mentioned object, the invention according to claim 4 is roughly based on the invention according to claim 3, and further includes a third detection method for detecting that the rear door of the vehicle is opened at a position higher than the roof of the vehicle. While opening of the rear door is detected by the third detector, the pallet is prevented from moving by a twenty-first locking mechanism.

(Embodiment) A0 Overview of the Invention This invention provides a method for ensuring that the rear door of the vehicle is fully open when moving the pallet 1~ on which the vehicle is mounted after the vehicle has been put into storage, or that the rear door of the vehicle is fully open while the pallet 1~ is being moved. It was decided to electrically detect that the rear door might be fully open, temporarily stop the movement of the pallet, and move the pallet after manually confirming that the rear door was completely closed. The aim is to achieve the above objectives. Hereinafter, one embodiment of the rear door protection device according to the present invention will be described in detail.

B. Structure of an Embodiment FIGS. 1 to 3 are plane views of a parking area of a pallet 1 to a pallet 1 at an entrance 1 of a recirculating multi-level parking facility to which a rear door protection device is applied, which is an embodiment of the present invention. In these figures 1 to 3, a detector P l consisting of a light emitter and receiver is located at a position very close to the entrance 1 in the part 1-2 stopping place. -14 is installed with its emitter and receiver separated on both the left and right sides, and is designed to detect people and vehicles entering and leaving the exit 1 on the horizontal optical axis a perpendicular to the vehicle entry direction h. . In addition, the above-mentioned detector P is installed on both left and right sides of the pallet 2 at approximately the center position.
Detector Pl-12, which has the same configuration as Pl-14, is designed to be able to detect when the vehicle 3 drives onto the pallet 2 and is piled up on the optical axis parallel to the optical axis a. [It's being pulled. Roughly speaking, there is an allowable range of 4 vehicles for vehicle 3 that enters pallet 1 on top of 2 and is loaded onto the island.In other words, even if vehicle 2 moves directly to pallet 1, other mechanical parts of the multi-story parking facility and vehicle 3 may be damaged on the way. The limit position at the rear of the parking range (near the entrance/exit) where there is no risk of a collision accident is set at a position J: which is the middle position of the pallet 2. In this case, a detector PH1 having the same configuration as the above-mentioned detection day (4) is installed so as to be able to detect when the vehicle 3 protrudes rearward from the permissible parking range on the optical axis C parallel to the optical axis a. It is being

On the other hand, the front limit position of the permissible parking range is set a predetermined distance or ahead of the intermediate position of the parking area.
Also on the left and right sides of this position, detectors PH3 having the same configuration as the above-mentioned detector PPH can detect that the vehicle 3 is protruding forward from the permissible parking range on the optical axis d parallel to the optical axis a. It is set up like this.

As shown in FIGS. 1 and 2, there is a position near the pallet 2 corresponding to the rear right side of the vehicle 3, and a position near the pallet 2 corresponding to the front right side of the vehicle 3, and on the upper surface of pallets 1 to 2. The above detector P l-14 is located at a constant height hl.
A detector PH8 having the same configuration as above is configured to detect a person entering or exiting the vehicle 3 on the optical axis e perpendicular to the optical axis a. That is, this embodiment corresponds to a so-called right-hand drive vehicle. In addition, on both front and rear sides at a predetermined height h2 from the upper surface of the pallet 2, a detector PH1 having the same configuration as the detector Pl-14 is installed to detect the fully open state of the rear door on the optical axis f parallel to the optical axis e. It is set up so that it can be detected.

Further, a detector PI-1 having the same configuration as the above-mentioned detector P l-14 is installed with a fixed interval between the position where the detector P H1 is installed and a position a predetermined distance l ahead from that position.
, PI-(, PH, 3 is parallel to the optical axis a DI
D2 is installed so that a person can be detected on each of the optical axes g, h, and i. Here, the distance l is Ii for this l11 vehicle equipment.
This is a value determined by the dimensions of the vehicle 3 that can be parked and the parking position of the vehicle 3. Among the 41 vehicles that can be parked in this parking facility, the vehicle 3 with the smallest longitudinal length is placed at the front limit position of the parking range. It is determined by the position of the rearmost part of the vehicle 3 when the vehicle 3 is moved.

C. Method for Detecting Rear Door Status Next, a method for detecting whether the rear door 4 is fully open in the parking facility configured as described above or the possibility that the rear door 4 will be fully open while the pallet 2 is being moved will be described. This method includes the following three methods. The first method is to directly detect the fully open state of the rear door 4 on the detector low 1□, and as shown in FIG. When the light is present on the optical axis f0, the detection light of the detector Pl-1, .
The fully open state of the rear door 4 can be detected because the light is blocked.

The second method is to use the detectors PH1, PH91, Pl-1, P
By determining whether a person has been detected at least twice by one of the detectors in the HD 3 = 11 = , it can be indirectly determined that the rear door 4 is fully open or that the pallet 2 is being moved. rear door 4
This is to detect that there is a possibility that the engine will be fully open.

In the third method, after the vehicle 3 has entered the garage, the time from when the vehicle 3 J: comes out to when the vehicle exits from the entrance 1 is 81.
By measuring the value and comparing it with a predetermined value, it can be indirectly determined that the rear door 4 is fully open or that the pallet 2 is fully open.
This detects that the rear door 4 may be fully open while the vehicle is moving. Specifically, the detector P H8
From the time when the detector Ro-18 detects that a person has passed on the optical axis e of The time is measured and compared with a predetermined value.

Next, by the second and third methods, the rear door 4 is indirectly
The reason why it is possible to detect that the rear door 4 is fully open or that there is a possibility that the rear door 4 is fully open while the pallet 2 is moving will be explained.

To explain the above reason, let us consider the actions of a person when, after the vehicle 3 is parked in the assembly yard, the user listens to the rear door 4 and carries out the luggage. First, a person gets off the vehicle 3 and moves to a position behind the rear door 4 in order to open and cover the rear door 4. At this time, at least the detector PI-19
Since a person passes on the optical axis of 2, the detector P l-1,
2 outputs a detection signal once. After this, when a person approaches the rear of vehicle 3 to take out luggage from vehicle 3, the light flashes again.

Since it passes along the axis, a second detection signal is output from the detector PH92. If a person carries luggage and moves to the outside of the parking facility through the entrance/exit 1, the person will pass through the optical axis h-F again due to the movement and the detectors P l-1, 2 to 3 will pass through the optical axis h-F. The second detection signal will be output. In addition, if the luggage taken out from the vehicle 3 is not directly carried out to the outside, but is first stacked at the rear of the vehicle 3 and then carried out, it is possible to avoid the need for people to take out the luggage from the vehicle 3 and carry it out each time. Optical axis [1 up to 2
1. The number of times a person is detected by the detector P )-102 increases by two for each stacking operation. When the vehicle 3 enters the parking lot and the rear door 4 is opened to take out the luggage, the detector P l-
11) The detection signal from 2 will be output three or more times.

The above has described a typical case of the cargo carrying out operation, but in reality, the detector P l-
In some cases, the detection signal is output from ID2 only twice. This may occur, for example, when the optical axis of the detector PHo2 is close to the rear of the vehicle 3. However, if the optical axis is close to the rear of the vehicle 3, even if a person approaches the rear of the vehicle 3 to take out luggage after opening the rear door 4, the person will block the optical axis. However, it does not reach the point where it passes through the optical axis, in other words, a detection signal is output only once in one baggage removal operation.

Therefore, if we consider the case where a person gets off the vehicle 3, opens the rear door 4, takes out the luggage, and then leaves the equipment in the vehicle 51, the detector PH1゜2 in this case.
The number of times a person is detected is two times in total: when a person gets off the vehicle 3 and moves behind the rear door 4, and when the person listens to the rear door 4 and takes out luggage from the vehicle 3.

In the above, as shown in FIGS. 1 and 2, the rearmost part of the vehicle 3 (the first door side of the entrance/exit) is connected to the detector PI-1, 1°P.
Although the case where the position is between l-1 and 1-2 has been explained, the rearmost position of the vehicle 3 considered in this example is a position where the detector PHl is provided outside the above-mentioned detectors PH, PHo, and floor plan. A position a predetermined distance l in front of the detector [
) between the detectors PH and 2, and between the detectors PHo3 and the detectors P1-11. Therefore, the position of the rearmost part of the vehicle 3 is the detector P)
-11 is set between a position a predetermined distance l ahead from the position where the vehicle 3
When carrying out luggage by listening to the rear door 4 after entering the parking lot, a detection signal is output from at least the detectors PI-1, 1 at least twice in place of the detector PI-(). .Furthermore, the rearmost position of the vehicle 3 is the detector PI-1,
Between Pl-1, 3 or detector P l-1, , 3, P
If it is between P l-11, the detector P l-1,2
instead of at least the detectors PI-1, PH1, respectively.
A detection signal is output more than once.

From the above, after vehicle 3 completes parking, vehicle 3J: After the person comes out, detector PI-(, PH, 1, P1-I
02. When the detection signal is output from any one of the detectors P l-I D3 twice or more, it is detected that the rear door 4 has been opened to take out the luggage. This suggests that the rear door 4 is fully open, or that the rear door 4 may be fully open while the pallet 2 is moving.

On the other hand, from a time perspective, comparing the case where a person simply gets off the vehicle 3 and leaves the parking facility with the case where a person takes out luggage and then leaves the parking facility, the time required in the latter case is: longer than the former. That is, by measuring the time from the time a person comes out of the vehicle 3 until the person exits through the entry/exit entrance 1, and comparing that value with a predetermined value, it is possible to determine whether or not luggage has been taken out. Can be detected. 1 = Once the rear door 4 is in the fully open state by the third method, or the rear door 4 is opened while moving to the pallet 2.
It can be seen that it is possible to detect that there is a possibility that the engine is in a fully open state.

m-Jengyuanyu 11 Next, the operations when the above-mentioned first to third methods are applied to the multi-level parking facilities shown in Figs. 1 to 3 will be explained respectively.

First, the operation when the first method is not applied will be explained. As shown in Fig. 2, when the rear door 4 is in the fully open state, the rear door 4 is located on the optical axis f of the detector []I'', so it can be determined from the detector PH, that the rear door 4 is in the open state. A detection signal indicating this is output. While this detection signal is being output, that is, while the rear door 4 is in the fully open state, the movement of the pallets 1 and 2 is stopped using a lock 1a mechanism (not shown).

Next, the operation when applying the second method will be explained. FIG. 4 is a diagram showing this operation flow. first,
It is determined whether the parking of the vehicle 3 that has entered the parking facility has been completed (step 81). For example, vehicle 3 sequentially blocks optical axes c and b, and then vehicle 3 passes over optical axis C and is blocked, and the completion of storage is determined based on the fact that only optical axis C is left. can be read.

Then, it is determined whether or not a person has gotten off the vehicle 3 (step 82). Specifically, when a person alights from the vehicle 3, the person passes on the optical axis e of the detector IDH3, so whether or not the person alights is determined from the output of the detector P1-18.

Next, the detectors PH,1, PHo2. PHo3. P.I.
-11, if the detection signal output from the detector is output twice or more (step S3), it is assumed that the opening operation of the rear door 4 has been performed as described, and therefore the doorway It is prohibited to close the door (not shown), and the movement of the Zunawara pallet 1-2 is prohibited (step S711).At this time, the rear door 4 is fully opened by displaying a warning on the alarm device or operation panel, etc. It is desirable to notify the staff that the rear door 4 may be fully open during the movement of the pallets 1 and 2. Then, when the staff member confirms that the rear door 4 of the vehicle 3 is completely closed (step S5), the staff member releases the prohibition on movement of the pallets 1 and 2 (step S36). At this step S6, return to normal operation.Meanwhile, each detection is
- If the number of detection signals output from I1 is one or less, normal operation is performed.

Next, the operation when the third method is not applied will be explained. FIG. 5 is a diagram showing this operation step ``1-''. First, similarly to the second method, step S
1) After that, the person gets off the vehicle 3, and it is determined whether or not it is Iζ (step S2).

Then, in order to measure the time it takes for a person to leave the entrance/exit 1 after the person exits the vehicle 3, a timer counter (not shown) records the time at which the person exits the vehicle 3. After clearing the existing data, the process starts from 1 (step 810).

After that, the detector PH1 detects the passage of a person on the optical axis C (step 511), and the detector PH4 detects the passage of a person on the optical axis C (step 511).
The passage of a person on the optical axis a is detected (step 512).
Then, timer counter 1- is finished and the time from when the person exits vehicle 3 until the person exits from entrance 1 is calculated, and compared with the preset time (
Step 513). Here, in this embodiment, step S1
1 is set, but there is no essential problem even if this step is not included.However, this step S11
By providing this, the following advantages 1 to 1 can be obtained: malfunctions are prevented. That is, step 31
1) (If not, if a person enters the parking facility on the way to passing on the optical axis a after getting off the car (step S2) (step 512), the detector 1) l- 14 detects the person (step 512). Therefore, accurate time i+ measurement cannot be made.

If the sub-side time is longer than the set time J:, it is determined that the cargo has been carried out, and the movement of pallets 1 and 2 is prohibited in the same way as the operation shown in FIG. 4 (step S4). )
. At this point, similar to the above, a warning may be displayed on the alarm system or the operation panel to indicate that the rear door 4 is fully open, or that there is a possibility that the rear door 4 will be fully open while the vehicle 1 and 2 are moving. It is advisable to let the staff know about this.

When the staff member confirms that the rear door 4 of the vehicle 3 is completely closed (step S5), the staff member releases the prohibition on the movement of pallets 1 and 2 (step S5).
6). Here, in order to detect that the attendant has entered the facility in the play to confirm the opening of the rear door 4, steps S1/I are executed between steps S4 and S5, unlike the J operation shown in FIG. It is provided. This step S
Reference numeral 14 is used to confirm whether or not the attendant has passed on the optical axis a by checking the detector P1'4.

On the other hand, if it is shorter than the set time between Wll surveys, it is assumed that the cargo has not been carried out and normal operation is resumed.

As described above, by applying the first to third methods to the parking facilities shown in FIGS.
Since the pallet 2 is prevented from moving by detecting that there is a possibility that the pallet 2 may become fully open, it is possible to prevent accidents such as damage to vehicles and parking equipment. Also,
If this J: Una accident is prevented, the management and operation of parking facilities can be carried out efficiently.

In the above embodiment, each of the first to third methods is used to detect that the rear door 4 is fully open, or that there is a possibility that the rear door 4 will be fully open while the pallet [-2 is moving. In the above, the case where the rear door 4 is prevented from moving to the parking lot has been explained, but the rear door 4 can be kept fully open by appropriately combining the first to third methods depending on the usage state of the parking equipment. Or pallets 1-2
It may be detected that the rear door 4 may be fully opened while the vehicle is moving. In this case, the advantages 1 to 1 can be obtained that the reliability of detection is improved.

In particular, the second and third methods indirectly detect that the rear door 4 is fully open, or that the rear door 4 may be fully open while the pallet 2 is moving. Therefore, in practical use, it is preferable not to combine it with the first method of directly detecting that the rear door 4 is in the fully open state.

Further, in the above embodiment, the detectors PH,1,P1 are arranged at a constant interval between the position where the detector Pl-11 is installed and the position a predetermined distance 1111111 away from that position.
-1, PI-ID3 are provided, and the mutual spacing between these detectors PI-1, PI-1, PH, 3 may be set appropriately depending on the usage state DI D2. Also, regarding the number of detectors, in the embodiment described above, detector P l-1
3 detectors P l-1, 1, P l-1, 2 in addition to 1
, l) l-1°3, but an appropriate number may be provided depending on the usage condition.

In addition, in the second embodiment, the case where the detector Pl-18 is installed in the position corresponding to a right-hand drive vehicle shown in FIG. A detector compatible with left-hand drive vehicles may be provided.

In short, if a detector is appropriately installed to detect people coming out of the vehicle depending on the usage condition, it will be possible. If the equipment's rear door protection device is used, the first detector detects that a person leaving the vehicle is detected, and then the second detector located behind the rear door of the parked vehicle detects that person is detected two or more times. Then,
Since the first locking mechanism is configured to prevent the pallets 1 from moving, it is possible to detect with a simple configuration that the rear door is fully open or that the rear door may be fully open while the pallet is being moved. This has the effect of preventing damage to parking equipment and parked vehicles, and making management and operation more efficient.

Further, according to the rear door protection device for a multilevel parking facility according to the invention of claim 2, in addition to the invention of claim 1, there is a third aspect of the invention.
When the detector detects that the rear door is fully open, the second locking mechanism prevents the pallet from moving during that time. The effect of improving the reliability of preventing breakage accidents can be reduced by 1L.

According to the rear door protection device for a multilevel parking facility according to the invention of claim 3, the first detector detects a person getting off the vehicle until the second detector detects the person passing through the entrance/exit. , and if the time is longer than a predetermined value, the first locking mechanism is activated to prevent the pallet from moving. Therefore, with a simple configuration, the rear door is fully open or the pallet is not moved. It is possible to detect the possibility that the rear door may be fully opened while the vehicle is in motion, thereby preventing damage to parking equipment and parked vehicles.
This has the effect of making management and operation more efficient.

Further, according to the rear door protection device for a multilevel parking facility according to the invention of claim 4, in addition to the invention of claim 3, there is also a third
When the detector detects that the rear door is fully opened, the second locking mechanism stops the movement of the pallet h during that time, so that in addition to the effect of the invention as claimed in claim 3, damage accidents can be prevented. It is possible to obtain the effect that the reliability of prevention is improved.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a pallet stopping place in a multi-story parking facility to which a rear door protection device according to an embodiment of the present invention is applied, and Fig. 2 is a side view showing a pallet stopping place in the multi-story parking facility shown in Fig. 1. Fig. 3 is a front view of parts 1 to 4 of the multilevel parking facility shown in Figs.
This figure is a diagram showing an example of the operation of the multi-story parking facility shown in FIGS. 1 to 3, and FIG. 5 is a diagram showing another example of the operation of the multi-story parking facility shown in FIGS. 1 to 3. 1°...Archive/outlet, 2...Pallet 3
...Vehicle, l...Distance, PH, PH
, PH, PHo2゜4D1

Claims (4)

[Claims] (1) In a multilevel parking facility in which vehicles are stored by circulating a large number of vehicle loading pallets, vehicles parked on the pallets at the parking limit position on the side of the pallet at the entrance/exit. a first detector that detects when a person gets off the vehicle; a rearmost portion of the vehicle when the vehicle is parked such that the front portion of the vehicle corresponds to a front parking tolerance limit position of the pallet; and a rear parking tolerance of the pallet. at least one second detector is provided between the rear parking limit position and the rear parking limit position and detects a person between the rearmost part of the vehicle and the rear parking permissible limit position; and the first detector detects a person getting off the vehicle. and a first locking mechanism that prevents movement of the pallet when the second detector detects a person at least twice. Device. (2) a third detector that detects that the rear door of the vehicle is opened at a position higher than the roof of the vehicle; and while the third detector detects that the rear door is opened, the pallet The rear door protection device for a multilevel parking facility according to claim 1, further comprising a second locking mechanism for preventing movement. (3) In a multi-story parking facility in which vehicles are stored by circulating a large number of vehicle loading pallets, from a vehicle parked on a pallet at the side parking limit position of the pallet at the entrance/exit. a first detector that detects when a person exits the vehicle; a second detector that detects the passage of a person at the entrance/exit; and a second detector that detects when the person exits the vehicle after the first detector detects that the person exits the vehicle. A rear door of a multi-story parking facility, characterized in that the rear door is equipped with a first locking mechanism that measures the time until the passage of a person is detected, and prevents the movement of the pallet when the time is longer than a predetermined value. Protective device. (4) a third detector that detects that the rear door of the vehicle is opened at a position higher than the roof of the vehicle; and while the third detector detects that the rear door is opened, the pallet 4. The rear door protection device for a multi-story parking facility according to claim 3, further comprising a second locking mechanism for preventing movement of the rear door.