JPH0345185B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a multi-level parking system in which when a person is present near the lower vehicle support platform,
This invention relates to a safety device that controls upper and lower vehicle support platforms to prevent them from descending or moving sideways.

Conventionally, as the above-mentioned safety device, a large number of matsuto switches 4 are arranged on both sides of the lower vehicle support stand 2 as shown in FIG. In response to this, there was a system that stopped the lower vehicle support platform from moving horizontally and also prevented the upper vehicle support platform from lowering even if the upper vehicle support platform was operated to lower the vehicle support platform.

However, in such a safety device, there is a frame portion around each mat switch 4, and this portion serves as a dead zone. Furthermore, the gaps between these matsu switches also serve as dead zones. Therefore, if a large number of matsu switches 4 are arranged as shown in FIG. 1, there will be a large number of dead zones as shown by hatching in FIG. 1, and there is a problem that safety cannot be ensured sufficiently. Ta. Furthermore, since the minimum operating load of the matsuto switch 4 is approximately 10 kg, even if an infant weighing less than this is placed on the matsuto switch 4, it will not be detected, resulting in the problem that safety cannot be sufficiently ensured.

This invention solves each of the above-mentioned problems and aims to ensure sufficient safety.

Therefore, the present invention provides a plurality of heat ray switches that detect when a person enters a detection area forming a predetermined area, so that the detection area is located at the periphery of the lower parking area of the multi-level parking system. This configuration includes a control unit that stops the lower vehicle support stand from moving in response to the detection of a person by at least one of these hot wire switches.

With this configuration, the heat ray switch detects objects based on the far infrared rays emitted by objects that enter the detection area, so even if a light infant enters the detection area, it will be able to reliably detect the infant. can. Therefore, safety can be sufficiently ensured. Also,
Since the hot wire switch does not have a dead zone around the detection area, if a plurality of hot wire switches are arranged so that the detection area is the peripheral edge of the lower parking area, there will be no dead zone at all. Therefore, safety can be sufficiently ensured.

As another technical means for achieving the technical object of the present invention, it is conceivable to use, for example, an ultrasonic switch or a phototube switch in place of the hot wire switch. However, ultrasonic switches and phototube switches detect vehicles as well as humans, and are prone to malfunction. However, since heat ray switches detect far-infrared rays emitted by objects, they can clearly distinguish between people who emit far-infrared rays and vehicles that do not, and will not malfunction. Furthermore, since the phototube switch only detects objects on the line connecting the light emitting element and the light receiving element, a large number of phototube switches are required to ensure safety.
However, since the heat ray switch detects a person entering a detection area formed in a predetermined area, a large number of heat ray switches are not required.

Hereinafter, this invention will be explained in detail based on two embodiments shown in FIGS. 2 to 4. A first embodiment is shown in FIGS. 2 and 3.

This embodiment is implemented in a two-stage multilevel parking system as shown in FIG. 2, where 10, 10, . . . are upper vehicle support stands, and 12, 12, . . . are lower vehicle support stands. The upper vehicle support stands 10, 10... are vertically moved up and down by a motor (not shown), and the lower vehicle support stands 12, 12... are moved laterally by a motor (not shown). It is something to do.

Wiring pipes 14, 14... are arranged along the longitudinal edges of the upper vehicle support stands 10, 10.... These wiring pipes 14, 14... have hot wire switches 16, 16... at predetermined intervals, respectively.
Detecting units 18, 18, . . . are arranged.

These detection units 18, 18... each have a rectangular detection area 20, 20... along the longitudinal edge of the lower vehicle support stand 12. The ends of the detection areas 20, 20... in the longitudinal direction are overlapped with each other so that there are no gaps between the detection areas 20, 20.... Furthermore, the two detection areas adjacent to each other in the center are also overlapped at the edges on the width direction side.

As shown in FIG.
2..., power supply parts 24, 24... and normally open contacts 26, 2
6..., and detects far infrared rays emitted by objects within the detection areas 20, 20... using a lens (not shown) in the detection unit 1.
When a person enters the detection area 20, 20..., the light is focused on the infrared sensor in the detection area 20, 20...
There is a difference in strength between the far infrared rays emitted by humans 0, 20... and the far infrared rays emitted by humans, and this difference is amplified by the amplifying sections 22, 22... to close the normally open contacts 26, 26... be.

Normally open contact 26 of each heat source switch 16, 16...
26 are connected in parallel with each other, and this parallel circuit is connected to the power supply circuit in series with the emergency stop relay 28.

Motor control relay 3 is connected in series with this power supply circuit.
0, a normally open relay contact 32 driven by the emergency stop relay 28, a power switch 34, a normally open emergency stop switch 36, and a key switch 38 are connected. Further, a normally open relay contact 40 driven by the motor control relay 30 is connected in parallel to the power switch 34. Motor control relay 30
In addition to the normally open relay contact 40, the drive also drives a normally open relay contact (not shown) provided in the energizing circuit for the motor that traverses the lower vehicle support 12, and also drives the upper vehicle support 10. A normally open relay contact (not shown) provided in the current supply circuit to the motor for lifting and lowering is driven.

In the safety device configured in this way, when the power switch 34 and the key switch 38 are closed, the motor control relay 30 is energized, and the relay contact 40 is energized.
is closed, and the motor control relay 30 is self-held. At the same time, the motor control relay 30 closes the normally open relay contact provided in the energizing circuit for the motor that traverses the lower vehicle support platform 12, and
A normally open relay contact provided in the energizing circuit for the motor that raises and lowers the upper vehicle support platform 10 is closed. This allows each motor to move up and down. Then, when a switch (not shown) corresponding to the predetermined upper vehicle support platform 10 to be lowered is closed, the predetermined lower vehicle support platform 12 moves horizontally, and after the horizontal movement is completed,
A predetermined upper vehicle support platform 10 is lowered.

At this time, when one of the hot wire switches 16, 16... detects a person and closes one of the normally open contacts 26, 26..., the emergency stop relay 28 is energized and the relay contact 32 is opened. . This stops the energization to the motor control relay 30, so the normally open relay contact provided in the energizing circuit to the traversing motor of the lower vehicle support stand 12 and the lifting motor of the upper vehicle support stand 10. will be held. Therefore, the power supply to each motor is stopped, the lower vehicle support stand 12 cannot move sideways, and the upper vehicle support stand 10 cannot move up and down, thereby ensuring safety.

FIG. 4 shows a second embodiment. This example is
Detection parts 18a, 18 of hot wire switches 16, 16...
The structure is the same as that of the first embodiment except that the mounting positions of a... are different. Equivalent parts are given the same reference numerals and their explanation will be omitted.

In this embodiment, the detection units 18a, 18a... are installed between the upper vehicle support stands 10, 10... and at both ends, the rear part is installed on a building such as a wall, the front part is installed on a pillar, etc. Long and narrow detection areas 20a, 2 are provided on both sides of the table 12 along its length.
It has 0a... The detection areas 20a, 20a of the detection units 18a, 18a facing each other completely overlap. In addition, each detection area 20a, 20
The central two portions a partially overlap in the width direction. This embodiment also operates in the same manner as the first embodiment.

In the above embodiment, the hot wire switches 16, 16...
Although the one having a normally open contact 26 is shown in FIG. 2, if the relay contact 32 is opened when the emergency stop relay 28 is de-energized, each hot wire switch 16 can have a normally open contact. . However, in that case, each normally closed contact must be connected in series.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the arrangement of a mat switch used as a safety device in a conventional multi-level parking system, and FIG. 2 is a perspective view showing the arrangement of a hot wire switch used in a first embodiment of the safety device in a multi-story parking system according to the present invention. 3 are circuit diagrams of the first embodiment, and FIG. 4 is a perspective view showing the arrangement of the hot wire switch used in the second embodiment. 16... Heat ray switch, 28, 30, 32...
control section.

Claims (1)

[Claims] 1 A plurality of heat ray switches that detect when a person enters a detection area having a certain area are arranged so that the detection area is the periphery of the lower parking area of the multi-level parking system, and these heat ray switches A safety device in a multi-story parking system, comprising a control unit that stops the lower vehicle support platform from moving in response to detection of a human by at least one of the control units.