JP2000352208A - Safety device of lift-type parking device having pit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an article from being held between an edge of a pit and an edge of a pallet by mounting a contact or non-contact-type article detector for detecting the articles over the approximately whole area from one end to the other end, on a lower edge of the pallet except for a lowermost one of a multi-stage pallet body. SOLUTION: A multi-stage pallet having a pit 1 and formed by vertically and integrally arranging a plurality of parking pallets is vertically movably installed. When the lowering motion of the multi-stage pallet is continued without noticing that a part of a body of a person and the like enters into a pallet elevation zone from an edge of the pit 1 in a state that the multi-stage pallet body is located on an raised position or during the lowering motion, the person or an article is in danger of being held between the edge of the pit 1 and an edge of the pallet excluding the lowermost pallet, and damaged. By detecting the existence of the person or the article by an article detector 9 mounted on the lower edges of the pallets 3 excluding the lowermost pallet, the lowering motion can be immediately stopped, and an accident in accompany with the damage of the person and article can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-stage or multi-stage lift-type parking device having a pit, and a multi-stage pallet body integrally formed with a plurality of stages of parking pallets at the top and bottom. The present invention relates to a safety device during a pallet body lowering operation.

[0002]

2. Description of the Related Art As a conventional safety device for a lift-type parking device having a pit, an object detector is provided on the lower surface of the lowermost pallet of a multi-stage pallet, and control for stopping the lowering operation of the multi-stage pallet by a detection signal is provided. Some include a circuit (for example, see Japanese Utility Model Registration No. 2517809).

In a conventional safety device of this type, when a multi-stage pallet body is lifted to create a space at the bottom of a pit, a person or an object enters by mistake, and the multi-stage pallet body is lowered without knowing the fact. In such a case, a person or an object is detected by the object detector provided on the lower surface of the lowermost pallet, and the descent operation of the multistage pallet body is immediately stopped by the control circuit to prevent danger.

[0004]

By the way, in a two-stage or multi-stage lift type parking apparatus in which a multi-stage pallet body having a pit and integrally forming a plurality of stages of parking pallets vertically is provided so as to be able to ascend and descend, Other pallets rise to a position above the edge of the pit on the ground surface, but when the pallet rises and stops, or during the descending operation, some people or objects fall into the pallet lifting area of the parking device from the edge of the pit. May inadvertently enter. If the pallet lowering operation is performed without knowing this, there is a danger that a part of a person or an object is pinched between the pit edge and the pallet edge other than the lowermost step. Such danger cannot be prevented.

SUMMARY OF THE INVENTION The present invention relates to a two-stage or multi-stage lift-type parking device having a pit, between a pit edge and a pallet edge other than the lowermost stage, which may occur during a lowering operation of a multi-stage pallet body. It is an object of the present invention to provide a safety device for preventing a danger of being caught by an object.

[0006]

In order to achieve the above object, in a safety device for a two-stage or multi-stage lift-type parking device having a pit according to the present invention, a pallet lower surface edge other than the lowest stage of a multi-stage pallet body is provided. The part is provided with a contact type or non-contact type object detector that detects an object over substantially the entire area from one end to the other end, and a detection signal is output from this object detector during the lowering operation of the multi-stage pallet body In such a case, a control circuit for immediately stopping the lowering operation of the multi-stage pallet body is provided.

The object detector provided on the lower edge of the pallet includes:
It is sufficient that the object can be detected over substantially the entire area from one end of the edge to the other end, and a contact type such as a combination of a detection member and a limit switch or a non-contact type such as a photoelectric type may be used. .

It is preferable from the viewpoint of safety that the object detector is provided on all four sides of the front, rear, left and right edges of the lower surface of the pallet.
It may be provided on two sides.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. FIG. 1 shows a basic structure of a lift type parking device embodying the present invention, wherein 1 is a pit formed by excavating the ground and two cars are accommodated in an underground part, and 2 is a three-parked parking lot. A multi-stage pallet body integrally formed with pallets, 3 is a middle pallet, 4 is an upper pallet, 5 is a lifting / lowering device for supporting and raising / lowering the multi-stage pallet body 2, and elevating guide columns 6 are set up on the left, right, front and rear of the multi-stage pallet body 2. A motor 7 for driving up and down, a drive shaft 8 and a drive sprocket (not shown) are attached to the upper end of one of the right and left guide columns 6 (not shown). The drive shaft 8 is provided with a plurality of elevating sprockets. One end of the chain wound around the driving shaft 8 is fixed to the upper end of the other elevating guide column 6 via a guide sprocket attached to the bottom of the multi-stage pallet. Rotation of shaft 8, is configured to lift the multi-pallet or unwinding or winding up the chain. 9
Is a contact-type object detector provided on the lower edge of the middle pallet 3 and the upper pallet 4 on the entrance side of the vehicle. Only one of the four sides of the pallet is illustrated for easy understanding in the drawings.

FIG. 2 is a block diagram of an electric circuit, which normally receives an operation signal from an operation section 21 and a signal from a position sensor 22 for detecting the position of a pallet, and a control circuit 23.
The motor 7 is driven and stopped to control the elevation of the parking pallets in each stage so that they are at substantially the same height as the ground surface. When the detection signal is output from the control circuit 23, the control circuit 23 immediately stops the motor 7.

FIG. 3 shows the middle pallet 3 shown in FIG.
Contact type object detector 9 provided on the lower edge of the vehicle entrance side
The contact type object detector 9 includes a mounting member 10 fixed to the pallet 3, a detection arm 11 having one end rotatably connected to the mounting member 10, and a pallet mounted on the other end of the detection arm 11. Detection bar 1 with a length approximately equal to the width
2. Limit switch 1 operated by detection arm 11
3. FIG. 4 is an explanatory diagram of the contact type object detector 9 viewed from the lower surface of the middle pallet 3.

As shown in FIG. 3, when a part of the human body such as the foot of an operator or another person or a part of an object enters the pallet elevating area of the parking device from the edge of the pit 1, the multi-stage pallet body 2 When the detection bar 12 of the contact type object detector 9 provided on the middle pallet 3 comes into contact with a part or an object of the human body during the lowering operation of the When the detection arm 11 is separated from the limit switch 13 and a detection signal is output, the lowering operation of the multi-stage pallet 2 is immediately stopped.

In addition to the contact type object detector shown in FIG. 3, a tape having an infinite number of narrow and longitudinal contacts widely used for various machinery and equipment for safety or automation. A switch or a safety edge switch may be used. FIG. 5 is a side cross-sectional view of a structure in which a tape switch 16 is built in a rubber cover 15 so as not to damage a contact object, and the safety edge switch 14 is attached to the lower edge of the middle pallet 3. is there.

FIG. 6 shows an example in which a non-contact type photoelectric object detector 17 is provided on the lower edge of the middle pallet 3 and the upper pallet 4 on the vehicle entrance side. A light projector 18 and a light receiver 19 are arranged at a position slightly below to form a beam 20.
During the lowering operation of the multi-stage pallet body 2, the beam 2
When 0 is cut off, a detection signal is output and the descending operation is immediately stopped. FIG. 7 shows an example in which the photoelectric object detector 17 is provided on the lower left and right edges of the middle pallet 3 and the upper pallet 4.

In this case, after the detection signal is held in the control circuit 23, the obstacle is removed and the safety is confirmed, and when the multi-stage pallet body 2 is lowered again, the reset button (not shown) is operated. For example, it is preferable to perform control so that re-driving can be performed only after the detection signal once input and held is released.

It is also possible to stop the lowering operation of the multi-stage pallet body 2 immediately after receiving the detection signal from the object detector 9 or 17, and then control to raise the multi-stage pallet body 2 for a certain time.

[0017]

Since the present invention is constructed as described above, a multi-stage pallet body having a pit and integrally forming a plurality of parking pallets vertically and vertically is provided so as to be able to move up and down.
In the case of a two-stage or multi-stage lift type parking device, when a multi-stage pallet body is in the ascending position or during a lowering operation, a part of a person or an object enters the pallet elevating region of the parking device from the edge of the pit. If you continue to lower the multi-stage pallet body without knowing that, there is a danger that some people or objects will be caught between the edge of the pit and the edge of the pallet other than the bottom pallet. Since the object detector provided on the lower surface edge of the pallet other than the above detects the presence of a person or an object and immediately stops the descending operation, it is possible to prevent an accident of damage to the person or the object.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a basic configuration of a liftable parking device according to an embodiment of the present invention.

FIG. 2 is a block diagram of an electric circuit.

FIG. 3 is an explanatory diagram of an operation of a contact-type object detector.

FIG. 4 is an explanatory diagram of a contact-type object detector viewed from a lower surface of a pallet.

FIG. 5 is a side sectional view of the safety edge switch.

FIG. 6 is an explanatory view of an example in which a photoelectric object detector is provided on the lower edge of the pallet on the side of the vehicle entrance.

FIG. 7 is an explanatory diagram of an example in which a photoelectric object detector is provided on a left lower edge of a pallet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pit 2 Multi-stage pallet body 3 Middle pallet 4 Upper pallet 5 Elevating device 6 Elevating guide column 7 Motor 8 Elevating drive shaft 9 Contact type object detector 10 Mounting member 11 Detection arm 12 Detection bar 13 Limit switch 14 Safety edge switch 15 Rubber Cover 16 Tape switch 17 Photoelectric object detector 18 Projector 19 Receiver 20 Beam 21 Operation unit 22 Position sensor 23 Control circuit

Claims (1)

[Claims] 1. A two-stage or multi-stage lift-type parking device having a pit (1) and a multi-stage pallet body (2) integrally formed with a plurality of stages of parking pallets above and below is provided. A contact-type or non-contact-type object detector (9, 17) for detecting an object over substantially the entire area from one end to the other end is provided at the lower edge of the pallet other than the lower stage, and during the lowering operation of the multi-stage pallet body (2) A control circuit (23) for immediately stopping the lowering operation of the multi-stage pallet body (2) when a detection signal is output from the object detector (9, 17). Safety device for lifting parking device.