JPH0718912A - Parking device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of malfunction by properly detecting the presence of a human body on the passage of a pallet. CONSTITUTION:A parking device comprises a pallet 4 having a passage 4b which is an opening closing space for a door 3 of an automobile 2 and at which a man walks; and a drive mechanism to move the pallet 4. In the parking device, a photoelectric switch 15 of the photoelectric switch unit is arranged to a stay 1b and a reflection plate 16 to a stay 1c so that beams 20 of a reflection type photoelectric switch unit are run approximately along the input and output of the automobile 2 and run at height lower than the level of the lower edge of a door 12 of the automobile 2. When a human body is sensed by means of the photoelectric switch 15, operation of a drive mechanism is prohibited.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parking device having a passage on a pallet and a drive mechanism for moving the pallet.

[0002]

2. Description of the Related Art As a conventional parking apparatus of this type, as disclosed in, for example, FIGS. 1 and 2 of Japanese Utility Model Publication No. 1-42622, a pallet formed of a plate material capable of accommodating an automobile is disclosed. , Having a drive mechanism for moving the pallet between a loading / unloading position and a storage position of the vehicle, and forming a door opening / closing space of the vehicle at both end portions of the pallet along the loading / unloading direction of the vehicle. There is also provided with a passage through which a person walks in and out to carry in and out the automobile.

In such a device, since a person can enter the pallet at the loading / unloading position on the passage for getting on and off the pallet, it is possible that a person is present on the passage. Regardless, when the pallet is moved, the person loses balance and falls, or the person is pressed or pinched by the pallet. Accidents such as people falling into the pit will occur in the pit-type parking device.

[0004]

In order to prevent such an accident, when a person or thing (hereinafter referred to as "human body") is present on the passage of the pallet at the loading / unloading position, the human body or the like is detected. It is necessary to prohibit the operation of the drive mechanism of the pallet, and the mat switch disclosed in Japanese Utility Model Publication No. 2-45390 is laid on the passage as a means for detecting the presence of a human body or the like on the passage. Can be considered.

However, when the pallet is made of a plate material, its rigidity is low and distortion is likely to occur,
The mat switch is affected by the distortion and can no longer properly detect the presence or absence of a human body, and the operation of the drive mechanism is prohibited even if there is no human body in the passage, or conversely, a human body exists. However, there is a problem in that the pallet is moved without prohibiting the operation of the drive mechanism, resulting in a malfunction.

The present invention has been made to solve this problem, and it is an object of the present invention to provide a parking device capable of appropriately detecting the presence or absence of a human body or the like existing on the passage to prevent the above-mentioned malfunction. To aim.

[0007]

In order to achieve the above object, according to a first aspect of the present invention, there is provided a pallet formed of a plate material capable of accommodating an automobile, and the pallet between an unloading position and a storage position of the automobile. And a drive mechanism for moving the pallet, on both side ends of the pallet along the entering and exiting direction of the automobile,
In a parking device that becomes a door opening / closing space of the automobile and is provided with a passage through which a person walks, a photoelectric switch unit in which light rays travel on the passage of the pallet at the loading / unloading position is attached to a fixed portion of the parking device. The operation of the driving mechanism is prohibited when the photoelectric switch unit detects a human body or the like.

In the second aspect, a reflection type photoelectric switch unit having a reflection plate is used as the photoelectric switch unit.

According to a third aspect of the present invention, the photoelectric switch unit is arranged so that the light beam travels substantially along the loading / unloading direction of the automobile between the upper surface of the passage and the lower edge of the door mounted on the pallet. Was placed.

[0010]

In the above parking apparatus of the present invention, whether or not a human body is present on the passage of the pallet at the loading / unloading position is irrespective of the distortion of the pallet, whether or not the light beam of the photoelectric switch unit is blocked. The operation of the drive mechanism is prohibited only when the human body or the like blocks the light beam of the photoelectric switch unit, and the pallet remains stopped. If a photoelectric switch unit having a reflection plate is used as the photoelectric switch unit, the structure can be simplified and proper detection can be performed, and the photoelectric switch unit is arranged so that the light beam travels lower than the lower edge of the door of the automobile. Then, the detection of the short human body and the like is eliminated.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a parking device showing an embodiment of the present invention. Reference numeral 2 is an automobile, and 7 is a floor for loading and unloading the automobile 2. A, B, C are storage positions in the upper row of the automobile 2, D,
E and F are storage positions, and G, H, and I are storage positions in the lower row in the pit 7a. Right column 1 on both sides of the parking device
a and the left side support 1a are erected. A pillar 1b is provided upright between the right pillar 1a and the left pillar 1a, and the pillar 1b has the same height as the floor 7. Reference numeral 3a is a middle-stage beam installed on the support columns 1a and 1b, and 3b is an upper-stage beam installed on the support column 1a. Reference numeral 4 is a horizontal pallet that moves in the horizontal direction, and 5 is an elevating pallet that moves in the vertical direction. The traversing pallets 4 are pallets that travel on rails (not shown), and each has a traversing drive source 6a. The lift pallet 5 is driven by a lift mechanism including a lift drive source 6 b and a chain 9.

Reference numeral 8 denotes an elevating gate, which is provided between the right support 1a and the left support 1a and is driven by a gate drive mechanism including a gate drive source 10 and a gate chain 19. The elevating gate 8 is lowered to the loading / unloading positions D, E, F to prohibit a person from entering the parking device.

Numerals 11a and 11b are a pair of tire guides for guiding the automobile 2 at the time of loading and unloading, and are attached to the middle beam 3a. Reference numeral 21 is an operation panel, which is the left-side support 1a.
It is equipped with various switches that are operated when loading and unloading automobiles, closing parking devices, etc., and is connected to a control circuit (not shown) that controls the operation of the drive mechanism for moving pallets and the drive mechanism for gates. There is.

FIG. 2 is a longitudinal sectional view of an essential part showing an embodiment of the present invention. FIG. 3 is a partially broken arrow view of FIG. In both figures, the column 1b is adjacent to the floor 7, and the column 1c is adjacent to the back wall 13. The traverse pallet 4 and the lift pallet 5 are divided into storage units 4a and 5a on which the automobile 2 is placed, and passages 4b and 5b which serve as an opening / closing space for the door 12 of the automobile 2 and through which a person walks.

Two columns 1 facing the loading / unloading positions D, E, F
The light receiving unit 1 is attached to the upper end surface of b through the mounting member 14.
Reflective photoelectric switch 15 having 5a and light projecting portion 15b
Is attached. A tire cover 11a with a window 17 is provided so as to cover the photoelectric switch 15. A reflecting plate 16 is provided at the same height as the lower edge of the door 12 of the automobile 2 on each of the supporting columns 1c facing the supporting column 1b in the loading / unloading direction of the vehicle. In addition, a red reflex reflector lens having a diameter of about 3 cm is used as the one excellent in reflection efficiency. Then, the photoelectric switch 15 and its reflection plate 1
6 and 6, a reflection type photoelectric switch unit is configured. The virtual line 20 is the photoelectric switch 15 and the reflector 1.
6 shows a light ray that travels between the light beam 6 and the light beam 6 emitted from the light projecting portion 15a of the photoelectric switch 15 through the window 17.
However, after being reflected by the reflection plate 16, it can reach the light receiving portion 15b of the photoelectric switch 15 as a reflected light beam.

The photoelectric switch 15 outputs a detection signal when the light beam 20 projected from the light projecting portion 15a is blocked and is not received by the light receiving portion 15b, and the detection signal is sent to the control circuit of the drive mechanism. On the other hand, it is input as a prohibition signal for prohibiting the movement of the traverse pallet 4 and the lifting pallet 5. The detection signal of the photoelectric switch 15 is invalid while the elevating gate 8 is descending to the front of the loading / unloading positions D, E, F.

The reflection type photoelectric switch unit described above is provided not only at the intermediate portion between the storage / delivery positions D, E, F, but also at each end of the storage / delivery positions D, F. A brief description will be given with reference to FIG. Similar to FIG. 3, FIG. 4 is a view showing a mounting portion of the photoelectric switch 15 with respect to the left-side support 1a, and a pedestal 18 protruding to the pallet 4 side is fixed to the support 1a located at the end of the parking device. The photoelectric switch 15 is fixed to the upper surface of the pedestal 18 via the mounting member 14. A tire guide 11b with a window 17 is attached to the middle beam 3a. The installation of the reflector and the like are the same as above.

In the parking device constructed as described above, the switches provided on the operation panel 21 are operated when the traverse pallet 4 or the lifting pallet 5 is moved.
The elevator gate 8 descends to the front of the loading / unloading positions D, E, F on condition that all photoelectric switches 15 in the loading / unloading position do not detect the presence of a human body or the like. With the lift gate 8 in front of the loading / unloading positions D, E, F, the lift pallet 5
And the traverse pallet 4 becomes movable. When the traverse pallet 4 and the lift pallet 5 are moved, the lift gate 8
Moves up to the position shown in FIG. 1, and the automobile 2 can be loaded and unloaded.

For example, when the vehicle 2 placed on the elevating pallet 5 in the lower storage position I in FIG. 1 is unloaded, the elevating pallet 5 in the unloading position D moves to the upper storage position A, The traversing pallets 4 at the loading / unloading positions E and F move to the loading / unloading positions D and E, respectively, and then the elevating pallet 5 at the lower storage position I moves to the loading / unloading position F.

Next, the detection operation by the photoelectric switch unit will be described.

The light beam 20 of the photoelectric switch 15 runs along the loading / unloading direction of the automobile 2, and the height of the light beam 20 is lower than the height of the lower edge of the door 12. For example, when the vehicle 2 is loaded into the storage portion 4a of the pallet 4 and the driver walks on the passage 4b in order to leave the parking device, the light beam 20 is blocked. Then, according to this, the photoelectric switch 15
From the detection signal to the pallet drive circuit,
Prohibit operation of drive mechanism. Therefore, the driver is
When the pallets 4 and 5 are present above, the pallets 4 and 5 are kept in a stopped state without being moved, so that an accident such as a driver's fall or a fall into the pit 7a due to the movement of the pallets 4 and 5 is caused. To be prevented. In order to carry out the vehicle 2, the detection operation and the movement prohibition of the pallets 4 and 5 are as follows.
When the driver enters the passage 4b from the floor 7,
The same applies when a child or the like invades the passage 4b or a luggage or the like is left on the passage 4b regardless of whether the human body is present on the passage 4b. Are similarly prevented.

The conditions under which the operation of the drive mechanism of the pallets 4 and 5 can be started are as follows.
E, F, and photoelectric switch units 15, 16
When the human body is not detected, the detection signal may be invalidated at the same time when the operation is started.

Photoelectric switch units 15 and 16 are used as means for detecting a human body or the like on the passages 4b and 5b. The photoelectric switch units 15 and 16 are not the traversing pallets 4 or the lifting pallets 5, but the columns 1a, 1b, which are fixed portions of the parking device. Even if the traverse pallet 4 or the lifting pallet 5 is distorted by being provided in the 1c, the human body can be reliably detected without being affected by the distortion, so that the human body or the like exists on the passages 4b and 5b. Although the operation of the drive mechanism is prohibited,
Alternatively, it is possible to prevent an erroneous operation in which the pallets 4 and 5 are moved without inhibiting the operation of the drive mechanism despite the presence of a human body or the like.

Reflection type photoelectric switch units 15 and 16
By using the projector, the strut 1b and the strut 1 can be attached to the strut 1b.
One of the wirings is not required as compared with the case where the light receiver 15b is provided opposite to c, and the work for arranging the photoelectric switch unit and the work such as repair and inspection are complicated. Can be prevented.

By arranging the photoelectric switch 15 and the reflector 16 so that the height of the light beam 20 traveling on the passage 4b along the loading / unloading direction of the automobile 2 is below the lower edge of the door 3 of the automobile 2, A child with a short height or a person who bends and has a low posture can be reliably detected over the entire area of the passage 4b.

The present invention is not limited to the above-described embodiment, but the reflector 16 may be a silver-plated mirror or the like, and the photoelectric switch units 15 and 16 are the floor 7 and the back wall. It can be attached to other fixed parts such as 17. Further, the same effect can be obtained by applying the present invention to not only the illustrated parking device but also other types of parking devices in which a walkway is provided on a pallet.

[0027]

As described in detail above, according to the parking apparatus of the present invention, the human body or the like can be reliably detected regardless of the distortion of the pallet, and the human body or the like does not exist on the pallet passage. The operation of the drive mechanism is prohibited, and even if the human body or the like is present on the passage of the pallet, the drive mechanism is activated and the human body or the like can be prevented from falling or falling. Further, it is not necessary to attach a detection device such as a mat switch to each of the pallets, and the parking device can be made inexpensive.

[Brief description of drawings]

FIG. 1 is a front view of a parking device as an embodiment of the present invention.

FIG. 2 is a cross-sectional view of essential parts of a parking device as one embodiment of the present invention.

FIG. 3 is a partially broken arrow view of FIG.

FIG. 4 is a view showing a mounting portion of a photoelectric switch with respect to a left end portion of a parking device.

[Explanation of symbols]

 1a, right column, left column (fixed part) 1b, 1c column (fixed part) 2 automobile 3 door 4 traverse pallet (pallet) 5 lift pallet (pallet) 4b, 5b passage 6a traverse drive source (drive mechanism) 6b lift Drive source (driving mechanism) 7 Floor 12 Door 13 Back wall 15 Photoelectric switch (photoelectric switch unit) 16 Reflector (photoelectric switch unit)

Claims (3)

[Claims] 1. A pallet formed of a plate material capable of accommodating an automobile, and a drive mechanism for moving the pallet between a loading / unloading position and a storage position of the automobile, and in a loading / unloading direction of the automobile. In a parking device in which both sides of the pallet are provided with a door opening / closing space for the automobile and a passage for a person to walk in, a light ray travels on the passage of the pallet in the loading / unloading position. A parking device, wherein the photoelectric switch unit is attached to a fixed portion of the parking device, and the operation of the drive mechanism is prohibited when the photoelectric switch unit detects a human body or the like. 2. The parking apparatus according to claim 1, wherein the photoelectric switch unit is a reflective photoelectric switch unit having a reflection plate. 3. The photoelectric switch unit is arranged so that the light beam travels substantially along the loading / unloading direction of the vehicle between the upper surface of the passage and the lower edge of the door of the vehicle mounted on the pallet. The parking device according to claim 1 or 2.