JP2677522B2 - Pallet fall prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift-type multi-story parking device, and more particularly to a device for preventing a pallet on which an automobile is placed from falling.

[0002]

2. Description of the Related Art Conventionally, as a multi-story parking device for parking a large number of vehicles in a limited place, there has been a multi-story parking device in which a suitable number of pallets on which vehicles are mounted are raised and lowered along fixed columns installed at four corners. It has been implemented. In such a multi-story parking device, if the raised pallet falls due to an accident such as a breaking of the elevating chain, the car mounted on the pallet, the lower car, and the multi-story parking device itself will suffer great damage. It is extremely dangerous because it may cause human injury. In order to avoid this danger, the multi-story parking device is provided with a pallet fall prevention device.

A conventional pallet fall prevention device is disclosed in, for example, Japanese Utility Model Application Laid-Open No. 2-12147. The gist of the pallet fall prevention device disclosed in the publication is that a solenoid plunger for driving a lock lever, which is a pallet receiving lever, a link, and a lock lever fixing portion are connected substantially linearly.
It aims at smooth operation and noise reduction. Actual Kaihei 2-
In the pallet fall prevention device disclosed in Japanese Patent No. 121547, FIG.
A plunger 66 of a solenoid 62 provided above is connected via a link bar 67 to a lock lever 61 which can rotate about a shaft 60 as shown in FIG. When the solenoid 62 is driven, the lock lever 61 is retracted from the pallet lifting passage. When the lock lever 61 protrudes into the pallet elevating passage, the mounting surface 63
Catches the falling pallet. Here, the lock lever 61 is formed of an iron plate having a thickness of about 16 to 20 mm.

Alternatively, Japanese Patent Application Laid-Open No. 2-43469 discloses a similar pallet fall prevention means. The pallet fall prevention device disclosed in the same publication has a lock lever that can be projected / retracted to / from the ascending / descending path of the pallet, is provided with a lock lever that is driven by its own weight, and drives a rear end of the lock lever with a solenoid, and a flexible switch that detects the retraction of the lock lever The purpose of this is to reduce noise during operation and to waterproof the flexible switch. As shown in FIG. 9, the pallet fall prevention device disclosed in Japanese Patent Laid-Open No. 2-43469 discloses a solenoid 72 having a lock lever 71 rotatable about a shaft 70 and a lower portion.
Is driven by. The lock lever 71 is shown in FIG.
Place the pallet that falls in the state shown by the solid line on the mounting surface 73
Take it above.

[0005]

However, the conventional pallet fall prevention device has the following problems. (1) In the pallet fall prevention device of Japanese Utility Model Laid-Open No. 2-121547, the solenoid 62 and the lock lever 61 are
Since they are spatially connected in series, this pallet drop prevention device has a problem that it is large and heavy. This means that when a multi-story parking lot is constructed, after the support columns are erected, the work of attaching the pallet fall prevention device to the support columns is performed. The conventional pallet fall prevention device was large and heavy, so that the efficiency of construction work was poor. Further, since the lock lever 61 is heavy, there is no choice but to enlarge the solenoid for rotating the lock lever 61, which causes a problem of cost increase. Further, since the lock lever 61 is heavy, the impact sound generated when the lock lever 61 is stopped is a serious problem. In particular, in a condominium or the like that requires a multi-story parking lot, it may be used at night, which is a problem because the noise generated at that time is loud.

(2) In the pallet drop prevention device disclosed in Japanese Patent Laid-Open No. 2-43469, the lock lever 7 is attached to the support column 75 itself.
Since it is necessary to form the cutout portion 76 for receiving 1,
This is a problem because the installation work is time-consuming. Since the supporting pillar 75 is usually H-shaped steel, and the position where the notch 76 is formed is directly connected to the height accuracy of the pallet mounting position, it is necessary to precisely process the H-shaped steel while aligning it on site during mounting. This is because the workability of mounting is not good. Further, if the heights of the lock levers 71 do not match among the support pillars 75 at the four corners, the load may be unevenly distributed and the pallet fall prevention device may be damaged.

Further, the lock lever 71 and the solenoid 7
2. The fact that the plates 77 and the like for attaching these to the support columns 75 are not integrated also contributes to poor mounting workability. Further, since the lock lever 61 is made of an iron plate having a thickness of about 16 to 20 mm, the heavy lock lever 61 deteriorates the workability of mounting. Further, the solenoid 72 is located further below the lock lever 71 which is long in the vertical direction, and the overall vertical dimension is long, which deteriorates workability.

Further, since the plunger 78 of the solenoid 72 is mounted facing upward, dust, rainwater, etc. enter the inside of the DC solenoid 72 and are apt to malfunction due to rust or the like. If the car immediately after traveling in rainy weather is loaded into a multi-story parking device and parked on the upper tier, such a problem occurs due to the dripping of rainwater dripping from the car. When the multi-story parking device is installed outdoors, rainwater directly penetrates. For this reason, frequent disassembly and maintenance were required to prevent rust, and it was practically difficult to use it stably for a long period of time.

The present invention has been made in order to solve the problems of the pallet drop prevention device according to the above-mentioned prior art, and has a small weight, an integral structure, a compact size, and an easy-to-hold property, which facilitates the mounting work and makes noise. It is an object of the present invention to provide a pallet drop prevention device having a small size.

[0010]

In order to achieve the above object, a pallet fall prevention device of the present invention is a plate fixedly attached to a support column supporting two or more moving pallets, and a rotation provided on the plate. A pallet drop prevention device having a support shaft and a pallet receiving lever rotatable about a rotary support shaft, and preventing the pallet from falling by the pallet receiving lever protruding into an ascending / descending path of the pallet. The receiving lever is a steel plate shaped like a U, and the pallet receiving lever is mounted inside the U-shaped space with the plunger facing downward.
It has a noid and has a plunger tip and a pallet receiving lever.
And are connected.

Further, the pallet drop prevention device of the present invention is
In the above apparatus, a cam hole is formed on the side surface of the pallet receiving lever, and a connecting rod for connecting the cam hole to the plunger is fixedly provided. Further, the pallet fall prevention device of the present invention is the above device, in which a stop hole is formed in a side plate of the pallet receiving lever,
It is characterized in that it has a stop rod which is fitted into the plate through a stop hole and an elastic member.

[0012]

In the pallet fall prevention device of the present invention having the above-described structure, the pallet receiving lever is rotated by its own weight around the rotation support shaft provided on the plate and normally protrudes into the pallet lifting passage. As a result, the pallet receiving lever receives the pallet even when an accident such as cutting of the pallet lifting chain occurs. When raising the pallet of the multi-story parking device, the solenoid is energized. As a result, the plunger is sucked by the solenoid body. A connecting rod attached to the plunger rises in a cam hole formed on the side surface of the pallet receiving lever. Since the axial center of the plunger is on the pallet side of the rotation support shaft, the pallet receiving lever is pulled up by the connecting rod of the plunger through the cam hole and pivots in the direction in which the solenoid is attached, and the pallet lift passage Evacuate from. Thus, the pallet can be raised. After raising the pallet,
When the solenoid is de-energized, the pallet receiving lever rotates under its own weight and projects into the pallet lift passage. Thus, even if the pallet falls due to an accident, the pallet receiving lever can receive the pallet.

Since the pallet receiving lever is formed by pressing an iron plate into a U-shape, and the solenoid and the plunger are mounted in the inner space of the U-shape, the entire apparatus is compact. Further, since the pallet receiving lever is light in weight, the solenoid can be downsized. Further, since the connecting rod attached to the plunger is directly driven by engaging with the cam hole formed on the side surface of the pallet receiving lever, unnecessary parts are unnecessary and the weight can be reduced. The noise generated by the rotation of the pallet receiving lever is reduced by reducing the weight of the pallet receiving lever, which is a movable part, and by downsizing the solenoid. Further, since the elastic body is mounted between the stop hole for stopping the pallet receiving lever and the stop rod, noise when stopping the pallet receiving lever can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a pallet fall prevention device embodying the present invention will be described below with reference to the drawings. FIG. 8 shows a schematic overall configuration of the lifting type multi-level parking device. In the elevating type multi-level parking device, H steel columns 51, which are supporting columns, are erected at four corners of the site to vertically divide a storage space for the automobiles 53 and 54, and a pallet 52 on which the automobile 53 is mounted is provided inside the pallet 52. It is provided so as to be vertically movable. Pallet 5
The reference numeral 2 is moved up and down along the H steel column 51 while the automobile 53 is being mounted by an elevator drive means (not shown) including drive equipment such as a motor and a hydraulic cylinder and power transmission means such as a chain. Each H steel column 51 has a pallet 5 when the pallet 52 is dropped due to an accident in the lifting drive means or the like.
Pallet fall prevention device 1 that receives 2 and prevents falling
Is provided. FIG. 8 shows a pallet drop prevention device 1 that raises the pallet 52 on which the automobile 53 is placed to the upper stage.
Shows the state where the fall is prevented. here,
Although the automobile 54 is parked in the lower stage, the automobile 54 is not damaged by the function of the pallet fall prevention device 1.

3 to 6 are external views of the pallet fall prevention device 1. 3 is a side view, FIG. 4 is a front view, FIG. 5 is a plan view, and FIG. 6 is a partial sectional view. The pallet drop prevention device 1 includes a central plate portion 11b of a U-shaped plate 11
The side plate portions 11c on both sides of the base plate 11c extend upward and are bent outward to form the mounting portion 11a. The pallet fall prevention device 1 is bolted to the H steel column 12, which is a support column, by a mounting hole 11d formed in the mounting portion 11a.
A bracket 17 is fixed to the opening of the side plate portion 11c. The solenoid main body 15 is attached to the bracket 17 via a solenoid attachment plate 18. The solenoid body 15 has a hollow cylindrical shape opened downward and has a slidable plunger 19 inside. A connecting rod 20 is attached to the tip of the plunger 19. Further, a rubber ring 23 for noise reduction is attached near the stop when the plunger 19 is sucked.
In addition, the solenoid main body 15 has a built-in hollow energizing coil in which a conductive wire is densely wound.

A mounting hole is formed in the center of the lower portion of the side plate portion 11c, and a rotary support shaft 14 is attached thereto. Side plate part 11
A hinge lever 13, which is a pallet receiving lever, is rotatably held on a rotation support shaft 14 inside c. The shape of the hinge lever 13 is shown in FIG. (A) is a plan view, (b) is a front view, and (c) is a side view.
The hinge lever 13 is formed by bending a steel plate having a thickness of 4 mm in a U-shape. The conventional pallet receiving lever uses an iron plate having a thickness of 16 to 20 mm, but the total weight of the pallet and the automobile is about 2 tons,
If a 4 mm steel plate is used in a U-shape, the strength is sufficient even if the safety factor is taken into consideration. Since the hinge lever 13 is formed by press forming a steel plate, the hinge lever 13 can be made lighter and the solenoid body 15 to be used can be used.
Was able to be miniaturized.

In the U-shaped inner space of the hinge lever 13,
The solenoid body 15 and the plunger 19 are housed. As a result, the pallet fall prevention device 1 can be made compact as compared with the conventional pallet fall prevention device 1. A pair of lever side plate portions 13 of the hinge lever 13
A cam hole 24, a circular support shaft hole 28, and an oval stopper hole 25 are formed in each a. Cam hole 24
As shown in FIG. 7, the shape of is formed by an arc having 24a and 24b at both ends and 24c which is substantially perpendicular to the arc. The support shaft hole 28 is fitted on the support shaft 14, and the hinge lever 13 is rotatable about the support shaft 14. The connecting rod 20 is engaged with the cam hole 24.

By energizing the solenoid body 15, the plunger 19 moves up and down, and in conjunction with the connecting rod 20 moving up and down along the outer periphery of the cam hole 24,
The hinge lever 13 rotates. A stop rod 26 is attached to the side plate portion 11c via a sound deadening ring 27. Further, the muffling ring 27 is fitted in the stopper hole 25. The hinge lever 13 is rotated and the stop rod 2
Stops in contact with 6. At this time, since the stopper hole 25 is provided, noise generated at the time of stoppage is reduced. Also,
A detection notch 13d for a limit switch is formed at the lower end of the lever side plate portion 13a. Also, the side plate portion 11
A pair of limit switches 21 and 22 are attached at positions corresponding to the lever side plate portion 13a of c.

Next, the operation of the pallet fall prevention device 1 having the above structure will be described. FIG. 1 shows the solenoid body 15.
3 shows a state in which no current is applied to the current-carrying coil. In this state, the plunger 19 is not sucked by the solenoid body 15. Therefore, the hinge lever 1
3 rotates clockwise in the figure by its own weight, and the stopper hole 2
5 stops at a position where it comes into contact with the stop rod 26 via the muffling ring 27. At this time, the hinge lever 13 projects forward from the central plate portion 11b, and when the pallet drops due to an accident or the like, the pallet mounting surface 13c receives the pallet. That is, in this state, the hinge lever 13 projects into the lift passage of the pallet to prevent the pallet from moving up and down, thereby preventing the pallet 52 from dropping unexpectedly.

Further, as shown in FIG.
4c is formed, in FIG. 1, even if the pallet is lifted in a state where the solenoid body 15 is not turned on, the connecting rod 20 can avoid to 24c, so that the hinge lever 13 can rotate counterclockwise. Is possible. In the present embodiment, the cam hole 24 is formed with 24c. However, in order to make the hinge lever 13 retractable, the solenoid hole 15 must be in the ON state without fail in order to make safety more important. It suffices to form 24 with only 24a and 24b.

Next, when a current is passed through the energizing coil of the solenoid body 15, the plunger 19 is moved by the solenoid body 15.
It is sucked up and rises. As the connecting rod 20 rises, the connecting rod 20 moves from the position 24b of the cam hole 24 to the position 24a.
And the hinge lever 13 is rotated counterclockwise. And, the hinge lever 13 is provided with the stopper hole 2.
5 is connected to a stop rod 26 via a silence ring 27.
Stops when it comes into contact with.

In this state, the hinge lever 13 does not project forward from the central plate portion 11b and is retracted from the pallet lift passage, so that the pallet is hinged to the hinge lever 13.
It can be moved up and down by the driving of the up-and-down driving means without being hindered. Further, when the current to the energizing coil of the solenoid body 15 is cut off, the holding force sucking the plunger 19 disappears. Since the center of gravity of the hinge lever 13 is located on the right side of the rotation support shaft 14 in FIG.
The hinge lever 13 rotates clockwise in the figure due to its own weight. Then, the hinge lever 13 rotates until the stopper hole 25 comes into contact with the stop rod 26 via the muffling ring 27, and stops at that position. That is, it returns to the state of FIG.

Next, an operation procedure of the elevating type multi-story parking apparatus provided with the pallet fall prevention device 1 having the above-described structure and operation on each H steel column 51 will be described. First, when the pallet 52 is at the lower level, the car 53 is driven to enter the pallet 52, and the occupant gets off the car 53. When the energizing coil of the solenoid body 15 of each pallet drop prevention device 1 is energized, the plunger 19 is attracted to the solenoid body 15 as described above, and the hinge lever 13 rotates to retract from the ascending / descending path of the pallet 52. In this state, the pallet 52 is lifted together with the automobile 53 by driving the lifting drive means. At this time, the pallet 52 is lifted to a position slightly higher than the upper fixed position supported by the hinge lever 13. This is to prevent the pallet 52 from hindering the rotation of the lock lever 2.

When the energizing coil 23 of each pallet drop prevention device 1 is de-energized, the hinge lever 13 rotates by its own weight and projects into the ascending / descending path of the pallet 52 as described above to prevent the pallet 52 from falling. It becomes a state. At this time, the detection notch 13d and the limit switches 21, 22
If the limit switch 21 is used as an NC contact (normally closed), it is possible to confirm that the hinge lever 13 is in the fall prevention position (FIG. 1) and the limit switch 22 is connected to the NO contact (normally closed). When used as an open position, it can be confirmed that the hinge lever 13 is in the retracted position (FIG. 2). In particular, in this embodiment, a limit switch can be attached to each of the side plate portions 11c on both sides to supply independent contact signals, and the hinge lever 13 is at the fall prevention position (FIG. 1) or the retracted position (FIG. 2). You can certainly confirm that.

Thus, the automobile 53 can be parked in the upper stage and another automobile 54 can be parked in the lower stage.
At this time, the load of the automobile 53 and the pallet 52 is supported by a chain or the like (not shown) of the lifting drive means. In the unlikely event that a failure of the lifting drive means occurs during parking, the pallet 52
Even if is dropped, the pallet 52 does not drop because it stops on the pallet mounting surface 13c of each hinge lever 13. At this time, the load applied to the hinge lever 13 is received by the upper end of the central plate portion 11b of the plate 11. The reason for lowering the pallet 52 a little is that the pallet 5
By reducing the gap between the lower surface of the pallet 2 and the pallet mounting surface 3, the potential energy of the automobile 53 and the pallet 52 is reduced, and the impact on the pallet fall prevention device 1 should the failure of the lifting drive means occur. This is to reduce the

When the vehicle 53 is to be taken out, the lower vehicle 54 is first taken out, and the pallet 52 is slightly raised by the driving of the elevating drive means. When the energizing coil of each pallet drop prevention device 1 is energized, the hinge lever 13 rotates as described above and retracts from the ascending / descending path of the pallet 52. In this state, when the pallet 52 together with the automobile 53 is lowered to the lower stage by the driving of the elevating and lowering means, when the energizing coils of the pallet fall prevention devices 1 are de-energized, the hinge levers 13 project again. Car 5 in this state
3 can be driven out of the elevator car.

As described in detail above, according to the pallet fall prevention device 1 of this embodiment, the hinge lever 13 is provided.
Is an iron plate press-formed into a U-shape, and has a solenoid main body 15 mounted in the inner space of the U-shape of the hinge lever 13 with the plunger 19 connected to the plate 11 facing downward. Hinge lever 1
Since the solenoid body 15 can be downsized in addition to reducing the weight of 3, the entire apparatus can be downsized and lightweight,
The assembling efficiency in construction can be improved.
Further, the cost can be reduced by downsizing the solenoid body 15. Further, since the weight of the hinge lever 13, which is a movable part, is reduced, noise generated can be reduced.

Further, the pallet fall prevention device 1 of this embodiment
Since the cam hole 24 is formed on the side surface of the hinge lever 13 and the connecting rod 20 that is connected to the cam hole 24 is fixedly installed in the plunger 19, unnecessary mechanical parts are not required, and the entire device is further improved. Can be made lighter. Further, since the pallet drop prevention device 1 of the present embodiment has the stop hole formed in the hinge lever 13 and the stop rod fitted into the plate 11 via the elastic member, the hinge lever 13 has a stop hole. The noise generated when stopping 13 can be reduced.

The above-mentioned embodiment does not limit the present invention at all, and it is needless to say that various modifications and improvements can be made without departing from the gist of the present invention.
For example, in the above embodiment, the pallet fall prevention device is
Although it was decided to use it for a multi-level parking device with three levels, it may be used for a multi-level parking device with three or more levels. In that case, the thickness of the steel plate forming the hinge lever 13 may be increased as necessary. Further, for example, in the present embodiment, the hinge lever 13 is manufactured by press molding, but may be processed by another manufacturing method.

[0030]

As is apparent from the above description, according to the pallet drop prevention device of the present invention, the pallet receiving lever is formed by forming an iron plate into a U shape, and the pallet receiving lever has a U shape. Since it has a solenoid attached with the plunger connected to the plate facing downward in the inner space of, the weight of the pallet receiving lever and the size of the solenoid can be reduced. The weight can be reduced and the assembling efficiency in construction can be improved. Further, the cost can be reduced by downsizing the solenoid. Further, since the weight of the pallet receiving lever, which is a movable part, is reduced, it is possible to reduce the noise generated.

The pallet drop prevention device of the present invention is
Since a cam hole is formed on the side surface of the pallet receiving lever and a connecting rod that is connected to the cam hole is fixedly installed on the plunger, no unnecessary mechanical parts are required and the weight of the entire device can be reduced. it can. Further, since the pallet drop prevention device of the present invention has the pallet receiving lever with the stop hole and the plate with the stop rod fitted through the elastic member, the pallet receiving lever is stopped. It is possible to reduce the noise generated when the operation is performed. Further, since the solenoid has an opening portion on the lower side, which is the opposite of the usual one, it has excellent weather resistance and is less likely to malfunction due to intrusion of rainwater, dust, and the like, and the frequency of disassembly and maintenance can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a hinge lever 13 of a pallet fall prevention device 1 according to an embodiment of the present invention projects into a pallet elevating passage.

FIG. 2 is a hinge lever 13 of the pallet fall prevention device 1.
FIG. 5 is a view showing a state in which is retracted from a pallet elevating passage.

FIG. 3 is a side view of the pallet fall prevention device 1.

FIG. 4 is a front view of the pallet fall prevention device 1.

5 is a plan view of the pallet drop prevention device 1. FIG.

FIG. 6 is a partial cross-sectional view of the pallet drop prevention device 1.

FIG. 7 is an external view showing the shape of a hinge lever 13.

FIG. 8 is a diagram showing an overall configuration of a multilevel parking device.

FIG. 9 is a diagram showing a configuration of a conventional pallet drop prevention device.

FIG. 10 is a diagram showing the configuration of another conventional pallet drop prevention device.

[Explanation of symbols]

 1 Pallet Drop Prevention Device 11 Plate 12 H Steel Column 13 Hinge Lever 15 Solenoid Main Body 19 Plunger 20 Connecting Rod 24 Cam Hole

Claims (3)

(57) [Claims] 1. A plate fixedly attached to a support column that supports two or more moving pallets, a rotation support shaft provided on the plate, and a pallet receiving lever rotatable about the rotation support shaft. A pallet drop prevention device for preventing a pallet from falling by having the pallet receiving lever project into a lifting path of the pallet, wherein the pallet receiving lever is an iron plate formed in a U-shape. Plan inside the lever's U-shaped space
A solenoid attached with the jar facing downward, and the tip of the plunger and the pallet receiving lever are
Pallet fall prevention device characterized by being connected . 2. The camcorder according to claim 1, wherein a cam hole is formed on a side surface of the pallet receiving lever, and a connecting rod that is connected to the cam hole is fixedly provided on the plunger. Pallet drop prevention device. 3. The stop rod according to claim 1, wherein a stop hole is formed in a side plate of the pallet receiving lever, and the plate is fitted into the stop hole via an elastic member. A pallet fall prevention device having: