JP2964450B2 - Displacement body fall prevention device and parking device provided with the 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 displacement member which is vertically displaced by winding or unwinding one end of a flexible interlocking member and is held at a predetermined height by the flexible interlocking member. However, the present invention relates to a device for preventing the device from falling from the holding position. The present invention also includes a pallet on which a vehicle is placed as the displacement body, and the pallet is moved up and down or tilted by a flexible interlocking member, thereby storing the vehicle over and above the pallet in a plurality of stages. The present invention relates to a parking device provided with the fall prevention device.

[0002]

2. Description of the Related Art A parking device as described above (for example, Japanese Patent Publication No.
In Japanese Patent Application Laid-Open No. 2-40496, there is a risk that the pallet held at a predetermined height may drop unexpectedly due to a cause such as breakage of a chain as the flexible interlocking member.

In order to avoid such a situation,
Conventionally, there has been provided an apparatus for preventing the pallet from unexpectedly dropping from a holding position at a predetermined height as an abnormal situation.

Conventionally, the fall prevention device is generally provided with a pallet rotatably provided on a fixed portion slightly below a holding position of a predetermined height of the pallet so as to protrude into a displacement passage of the pallet and stop there. A receiving member is provided.
The receiving member functions to support the pallet from below and prevent the pallet from falling when the chain is cut, for example.

When the pallet is normally displaced downward, the receiving member must be retracted from the displacement passage of the pallet so as not to hinder the downward displacement operation. Therefore, conventionally, a plunger connected to the receiving member and a solenoid for operating the plunger are provided, and these are electrically controlled to rotate the receiving member when the pallet is normally displaced downward. There has been proposed a device in which this is retracted from the displacement passage (for example, see Japanese Utility Model Publication No. 62-29546, etc., filed by the present applicant).

[0006]

However, in the above-described conventional configuration, a solenoid, which is an electric component, is used, and the downward movement of the pallet and the energization of the solenoid are controlled in conjunction with each other. Because of the need, the cost was inevitable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a problem to be solved is to provide a device for preventing a displacement body from falling and a device capable of reducing cost without lowering safety. To provide a parking device.

[0008]

In order to solve the above problems, the present invention uses the following means.

That is, by winding or unwinding one end of the flexible interlocking member, the flexible interlocking member is displaced up and down, and the displacement body held at a predetermined height by the flexible interlocking member drops from the holding position. A rotating body provided on the displacement body, the flexible interlocking member being wrapped around a lower side thereof, the displacement body being projected to a displacement passage of the displacement body and stopped. A receiving member rotatably provided on the fixed portion side slightly below the body holding position, holding means for holding the other end side of the flexible interlocking member against the load of the displacement body, Urging means for applying an upward urging force smaller than the load of the displacement body and larger than the load of the flexible interlocking member to the other end of the flexible interlocking member; Evacuate from the passage A retracting operation member that is operated to move and engages with the receiving member retracted from the displacement passage of the displacement body to restrain the receiving member from being retracted from the displacement passage of the displacement body; A restraining member that releases the restraint of the receiving member by mechanically interlocking with the upward displacement operation of the other end side of the flexible interlocking member when the biasing force of the force overcomes the load applied to the holding means. This is a device for preventing the displacement body from falling.

The displacement body may move up and down as a whole or, for example, may tilt around a fulcrum. Anyway, it is only necessary that at least a part thereof be vertically displaced.

As the flexible interlocking member, for example, a wire or a chain is used. Correspondingly, for example, a pulley or a sprocket is used as the rotating body.

The device for preventing the displacement body from falling includes, for example, a pallet on which a vehicle is mounted as the displacement body,
It is preferable to apply the present invention to a parking device in which a vehicle can be stored in a plurality of stages above and below the pallet by raising or lowering or tilting the pallet with a flexible interlocking member.

A pallet for in-vehicle use, which is displaced up and down by winding or unwinding one end of a flexible interlocking member by a motor and held at a predetermined height by the flexible interlocking member, A rotating body provided on the pallet, the flexible interlocking member being wound around the lower side thereof, and a rotating part slightly below the holding position of the pallet so as to protrude into the displacement passage of the pallet and stop. A freely provided receiving member, first detecting means for detecting when the pallet is displaced upward and reaching the holding position and stopping the operation of the motor, and a flexible interlocking member. Holding means for holding the other end against the load of the pallet; and a flexible interlocking means for applying an upward biasing force smaller than the load of the pallet and larger than the load of the flexible interlocking member. A biasing means to be applied to the other end of the wood,
A retreating operation member for rotating the receiving member to retreat from the displacement passage of the pallet, and engaging the receiving member withdrawn from the displacement passage of the pallet to move the receiving member to the displacement passage of the pallet. While being restrained from being retracted from, and mechanically interlocking with the upward displacement operation of the other end of the flexible interlocking member when the urging force of the urging means overcomes the load applied to the holding means. And a second detecting means for stopping the operation of the prime mover in conjunction with the displacement operation of the flexible interlocking member after the restraining member releases the restraint of the receiving member. And a parking device comprising:

[0014]

The displacing body is displaced upward by winding up one end of a flexible interlocking member wound around the lower side of the rotating body, and unwinds one end of the flexible interlocking member. As a result, a displacement operation is performed downward. At this time, the other end of the flexible interlocking member is held by holding means against the load of the displacement body, and the rotating body acts as a moving pulley.
When the load of the displacement body is applied to the flexible interlocking member, since the load exceeds the upward urging force of the urging means, the other end of the flexible interlocking member is in a fixed state. It is in.

When the flexible interlocking member is wound up and the displacement body is at the holding position of a predetermined height, the receiving member projects from the fixed portion slightly below the displacement portion into the displacement passage of the displacement body and stops. ing. For this reason, even if the flexible interlocking member breaks, the receiving member supports the displacing body, so that the displacement member is prevented from dropping.

When the displacement body is to be normally displaced downward from the holding position at a predetermined height, the retreating operation member is operated to rotate the receiving member and retreat it from the displacement passage of the displacement body. . At this time, the restraining member engages with the receiving member and restrains the receiving member from being retracted from the displacement passage of the displacement body. Therefore, the receiving member does not hinder the normal downward displacement operation of the displacement body.

When one end of the flexible interlocking member is unwound, the displacement body is displaced downward while the rotating body is rotated. Eventually, when the displacement body is displaced to the lower limit stop position and the downward displacement operation stops, the load of the displacement body applied to the flexible interlocking member that is still unwound gradually decreases. Then, when the upward biasing force of the biasing unit overcomes the load applied to the holding unit, the other end of the flexible interlocking member is displaced upward, and mechanically interlocked with this displacement operation, and A restraining member releases the restraining of the receiving member. Then, the receiving member rotates, projects again into the displacement passage of the displacement body, and stops.

When the flexible interlocking member is wound up and the displaceable body is displaced upward, the displaceable body contacts the receiving member projecting from the displacement passage from below and rotates it. To temporarily evacuate. When the displacement body has passed upward, the receiving member again projects into the displacement passage of the displacement body and stops.

According to the present invention, unlike the conventional one, an electric component such as a solenoid is not used as a means for retracting the receiving member from the displacement passage during the normal downward displacement operation of the displacement member. Therefore, since the material cost is low and complicated control is not required, the manufacturing cost can be reduced.

In order to displace the displacement body downward from the holding position at a predetermined height, the retracting operation member must be operated without fail. This leads to forcing a safety check below the displacement body before displacing the displacement body downward. Therefore, safety is high.

[0021] The first and second detecting means in claim 2 function to stop the winding operation and the unwinding operation of the flexible interlocking member by the prime mover at a predetermined time.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

In the present embodiment, a tilting multi-story parking device is shown as an example of a machine provided with the device for preventing a displacement body from falling according to the present invention. First, an outline of the tilting multi-story parking device will be briefly described. In the following description, for convenience, the front, rear, left, and right directions are based on the directionality of a vehicle entering in a forward operation and exiting in a reverse operation.

The parking device shown in FIGS. 1 to 3 has a base member 1 arranged on the ground GL. A pallet support member 2 is attached to a front (rear) end 1a of the base member 1.
Is erected. The pallet support member 2 supports a front end 4a of a tilting pallet 4 for mounting on a vehicle at a predetermined height via a horizontal pivot shaft 3 in the left-right direction.

The tilting pallet 4 as a displacement body has a front-rear length and a left-right width enough to mount the vehicle C1.
The rear side is vertically movable around the horizontal pivot shaft 3, and is tiltable about the horizontal pivot shaft 3 as a whole. The tilting pallet 4 has a rear end 4b that is in contact with the ground GL and has a tilt angle with respect to the ground GL of 10.4, for example, when the vehicle is in a loading / unloading attitude (an attitude indicated by a two-dot chain line in FIG. 2). °, the rear end 4b is lifted upward and the inclination angle with respect to the ground GL when the vehicle is in the retracted position (the position shown by the solid line in FIG. 2) is, for example, approximately 14.5 °, and the vehicle enters and exits the vehicle. The vehicle tilts between a normal attitude and the stored attitude.

The tilting pallet 4 has a wheel stopper 5 on the front side of the upper surface.

A driven column 6 and a driving column 7 are provided upright on both left and right sides on the rear side of the tilting pallet 4.
The lower ends of the columns 6 and 7 are firmly fixed to the base 1 member. The tilt pallet 4 tilts along these columns 6,7.

At least the driving-side column 7 of the columns 6 and 7 is formed of a steel material having a U-shaped cross section. As shown in FIG. 1, the drive-side column 7 is disposed with its open portion facing the right side of the tilt pallet 4.
An electric motor 9 with a speed reducer that can rotate forward and reverse is arranged at the upper end of the drive-side support 7 as a motor that applies a tilting driving force to the tilting pallet 4 via a chain 8 as a flexible interlocking member. Have been. This electric motor 9 has
A driving sprocket 10 having a rotating shaft 10a parallel to the horizontal pivot shaft 3 is operatively connected, and the chain 8 is wound around an upper side of the driving sprocket 10.

The parking device is provided with appropriate detecting means 11 and 12 for detecting that the tilting pallet 4 is in the posture when the vehicle is stored and the posture when the vehicle enters and leaves the vehicle. The electric motor 9 includes, for example, the drive-side support 7.
The driver operates the ascending operation switch SU and the descending operation switch SD (see FIG. 1 respectively) provided on the outer surface side of the vehicle to start the engine in the forward direction or the reverse direction, and receives signals from the respective detecting means. Thus, the winding or unwinding operation of the chain 8 is controlled to stop automatically.

As the detection means 11 and 12, for example, limit switches are employed. The illustrated parking device includes a limit switch 11 for stopping a chain winding operation as first detecting means and a limit switch 12 for stopping a chain winding operation as second detecting means.

The switch body 11a of the limit switch 11 for stopping the chain winding operation is fixed to the upper part of the driving-side support column 7, and the switch lever 11b projects horizontally into the displacement passage R of the tilting pallet 4. (See FIG. 3). The switch lever 11b
When the tilting pallet 4 which is displaced upward is in the posture when retracted into the vehicle, the tilting pallet 4 comes into contact with the right side of the tilting pallet 4 to actuate the switch body 11a.

The limit switch 12 for stopping the operation of unwinding the chain will be described later.

The tilting pallet 4 has a drive-side support 7
(The right side in the illustrated example) is provided with a driven sprocket 13 having a rotating shaft 13a in the same direction as the rotating shaft 10a of the driving sprocket 10. The driven sprocket 13 is located inside the drive-side column 7 having a U-shaped cross section.

The driven sprocket 13 is connected to the driving sprocket 10 via the chain 8. That is, as shown in FIG.
One end 8a of the chain 8 wound around the upper side of
The other end 8b of the chain 8 is wound around the lower side of the driven sprocket 13 and is extended upward, so that the drive 8 It is connected to the upper part of the side support 7.

As shown in FIG. 3, the tilt pallet 4
Has balance pulleys 14 and 15 having support shafts 14a and 15a in the front-rear direction on both left and right sides of the lower surface on the rear side. These pulleys 14 and 15 have
One balance wire 16 is wound. The balance wire 16 has its upper end 16a fixed to the upper end of the driven-side support 6 and extends downward, and is wound from below on a pulley 14a on the driven-side support 6 side (the left side in the illustrated example). After the tilting pallet 4
Is stretched in the width direction thereof, and is then wound around a pulley 15 on the side of the drive-side support column 7 from above, pulled down directly below, and in a tensioned state, the lower end 16 thereof.
b is fixed to the base member 1.

Note that sprockets and chains can be used instead of the pulleys 14 and 15 and the wire 16.

The parking device constructed as described above operates as follows.

When the vehicle C1 is stored on the tilting pallet 4, the vehicle C1 is driven forward and self-propelled on the tilting pallet 4 having the attitude at the time of entering and exiting the vehicle, and the driver (user) Get off.

The driver who disembarks turns on the switch SU for raising the tilt pallet 4 in order to raise the rear side thereof. Then, the electric motor 9 operates to drive the drive sprocket 10, and one end of the chain 8 is wound. Thereby, the driven sprocket 13
While acting as a moving pulley, the rear side of the tilting pallet 4 is raised.

Here, the chain 8 pulls up only the driving column 7 of the tilting pallet 4.
The tilting pallet 4 tilts while always maintaining the left-right balance. This is due to the action of the balance wire 16 and the balance pulleys 14, 15.

That is, when one end of the chain 8 is wound by the rotation of the driving sprocket 10,
The pulley 15 on the right side of the tilting pallet 4 is acted upon by a force for lifting the pulley 15 upward. The right pulley 15 is lifted upward while rotating clockwise as viewed in FIG. 3 and while extending the right portion of the balance wire 16 in a tensioned state upward. Then, the length of the balance wire 16 from the upper fixed end 16a to the right pulley 15 gradually decreases, so that the left pulley 14 rotates counterclockwise as viewed in FIG. It is forcibly pulled up at the same speed as the pulley 15 on the right side.

Then, when the tilting pallet 4 is in the storage position, the chain winding operation stop limit switch 11 is actuated to stop the electric motor 9 and stop the upward displacement operation of the tilting pallet 4. I do.
Another vehicle C2 is parked below the tilt pallet 4.

When the parked vehicles C2 and C1 are to be taken out, the operation is reversed.

Next, a device for preventing the displacement body from falling according to the present embodiment will be described mainly with reference to FIGS. 1, 4 and 5. FIG.

The device for preventing the displacement body from falling according to this embodiment is
An arm 17 is provided as a receiving member. The arm 17 functions to support the tilting pallet 4 in the vehicle storage position from below and prevent the tilting pallet 4 from dropping, for example, when the chain 8 is broken.

The arm 17 is provided on the inner side of the driving column 7 as a fixed portion, and is slightly below the upper limit stop position of the tilting pallet 4 (the position of the posture when the vehicle is stored). 2). The arm 17 is freely rotatable between predetermined angles so that it can protrude into the displacement passage R of the tilting pallet 4 and can retreat therefrom.

As shown in FIGS. 4 and 5, the arm 17 has a support shaft 18 in the front-rear direction (in FIG. 5, a direction perpendicular to the paper surface) serving as a center of rotation, and two ends of the support shaft 18. Through two plate-like support brackets 19 for supporting,
It is attached to the inner surface side of the driving-side support 7. There is an appropriate gap between the brackets 19,
The arm 17 is located within this interval.

In the normal state, the tip 17a of the arm 17 projects into the displacement passage R. For example, in the illustrated example, the center of gravity G of the arm 17 is positioned on the displacement passage R side of the tilting pallet 4 from the support shaft 18 (see FIG. 5). For this reason, in the normal state, the arm 17 is rotated by its own weight such that the distal end portion 17a descends in an arc and protrudes into the displacement passage R. The bracket 1 has an arm 1 that pivots downward.
Stopper 20 which comes into contact with 7 and stops it at a fixed position
Are fixedly provided. When stopped by contacting the stopper 20, the tilting pallet receiving surface 17b on the side of the tip portion 17a of the arm 17 faces upward and is located in the displacement passage R of the tilting pallet 4.

The arm 17 is connected to the stopper 2
The tilting pallet 4 is provided with an inclined surface 17c that smoothly extends upward from the outside to the inside of the displacement path R when the pallet 4 is in a stopped state in contact with the pallet 4 (see FIG. 5).
When the tilt pallet 4 is displaced upward, the tilt pallet 4 comes into contact with the inclined surface 17c from below. The tilting pallet 4 that is displaced upward is provided on the inclined surface 17.
The arm 17 is rotated upward so that the arm 17 is rubbed, and the arm 17 is released from the displacement passage R of the tilt pallet 4.

In a normal state, a suitable spring may be used as a means for projecting the distal end portion 17a of the arm 17 into the displacement passage R. In this case, the position of the center of gravity of the arm 17 is not limited.

When the tilting pallet 4 in the vehicle storage position is normally displaced downward, it is necessary to retract the arm 17 from the displacement passage R of the tilting pallet 4. Therefore, the fall prevention device according to the present embodiment is provided with a retreat operation member for manually rotating the arm 17 so as to retreat from the displacement passage R of the tilt pallet 4. Although various specific examples of the retreating operation member can be considered, in the illustrated example, a push for pressing a lower protruding portion 17d formed at a lower portion of the arm 17 to rotate the tip 17a side of the arm 17 upward is used. The rod 21 is employed.

The push rod 21 is connected to the arm 1
7 has a horizontal axis in a positional relationship orthogonal to the axis of the support shaft 18, and is provided so as to penetrate the drive-side support 7 in the left-right direction. At the outer end of the push rod 21, there is a head 21a. When the head 21a is pressed by a finger, the tip 21b of the push rod 21 which advances in the axial direction is moved downward by the lower projecting portion 17d of the arm 17.
push. In this manner, the arm 17 is forcibly rotated in the direction to withdraw from the displacement passage R.

The push rod 2 pushed into between the push rod 21 and the driving support 7
A spring (not shown) or the like for pushing back the push rod 1 can be provided. Also, when the arm 17 returns to the stop position due to its own weight or the like without using such a means, the return force of the push rod 21 may be pushed back.

The fall prevention device includes the tilt pallet 4
Is engaged with the arm 17 retreated from the displacement passage R of the tilting pallet 4.
And a restraining member for restraining the device from being retracted. In the illustrated example, a hook 22 is employed as the restraining member.

The hook 22 is located between the brackets 19 as in the case of the arm 17.
It is located above. The hook 22 is attached to the bracket 19 by a support shaft 23 parallel to the support shaft 18 of the arm 17.
It is attached rotatably with respect to.

The hook 22 has a claw 22a at its lower part. The claw portion 22a is connected to the push rod 2
When the arm 17 is rotated upward by the operation of 1 and is retracted from the displacement passage R of the tilting pallet 4,
The arm 17 automatically engages with the engaged portion 17f formed on the tip portion 17a side. Therefore, once the push rod 21 is pushed in by a predetermined amount and the arm 17 is once turned upward, the action of the hook 22 causes
The arm 17 is held in a state of being retracted from the displacement passage R.

Next, a mechanism for automatically releasing the engagement state between the hook 22 and the arm 17 will be described.

In the description of the outline of the parking device, it has been described that the other end 8b side of the chain 8 is connected to the upper part of the driving-side support post 7, but in more detail, as follows. I have.

That is, as shown in FIGS. 1 and 4, a small steel plate 24 is firmly fixed in a horizontal state on the upper part of the driving-side support 7. The steel plate 24 has a through hole 25 in the vertical direction substantially at the center thereof.
5, a bar member 26 having a head 26a having a larger area than the through hole 25 is inserted from above. This rod member 2
The head 26a functions as a stopper for preventing falling out of the through-hole 25, and also as a receiving portion for urging means described later.

The other end 8b of the chain 8 is connected to the lower end 26b of the rod member 26. The steel plate 24 and the bar member 26 cooperate with each other to hold the other end 8b of the chain 8 on the fixed portion (drive-side column 7) side against the load of the tilt pallet 4. Works.

The head 26a of the rod member 26 and the steel plate 2
A compression coil spring 27 as an urging means for applying an urging force upward to the rod member 26 is interposed between the compression coil spring 27 and the upper surface of the rod member 26. The degree of the urging force of the compression coil spring 27 is
The load of the tilt pallet 4 is smaller than the load of the chain 8. Therefore, when the load of the tilting pallet 4 is applied to the chain 8 (that is, when the tilting pallet 4 is tilting, and the tilting pallet 4 is held in the vehicle storage position). Time), this tilt pallet 4
The compression coil spring 27 is completely compressed in response to the load. On the other hand, after the tilting pallet 4 is in the vehicle loading / unloading posture and the load of the tilting pallet 8 is no longer applied to the chain 8, the compression coil spring 27 overcomes the load of the chain 8 and Member 2
Push up 6.

The rod member 26 is connected to the chain 2 as a connecting means.
8 and connected to each other with the hook 22.
The length of the chain 28 is as follows. That is, the urging force of the compression coil spring 27 is
When the load on the arm 17 is overcome, the restraint of the arm 17 by the hook 22 is automatically released in conjunction with the upward movement of the chain 8.

The upper end of the chain 28 may be fixed to the other end 8b of the chain 8.

The limit switch 12 for stopping the chain unwinding operation is provided above the bar member 26. The limit switch 12 has a switch main body 12a fixed to the drive-side support post 7, and a switch lever 12b extending right above the rod member 26 from a lateral direction. The rod member 26 comes into contact with the switch lever 12b after the rod member 26 is displaced upward and the restraint of the arm 17 by the hook 22 is released.
As a result, the switch body 12a is
To stop the unwinding operation of the chain 8.

The device for preventing the displacement body from falling according to the present embodiment configured as described above operates as follows.

When the tilt pallet 4 is held in the storage position, the arm 17 is stopped while projecting into the displacement passage R of the tilt pallet 4.
Therefore, even in the event of an unexpected event such as the chain 8 being broken, the worst case is avoided because the arm 17 prevents the tilting pallet 4 from falling.

When the tilting pallet 4 is displaced downward to the vehicle loading / unloading position in order to take out the vehicle C1 on the tilting pallet 4, etc., the push rod projecting outside the driving side support 7 The user presses 21 with a finger. Then, the tip portion 21 of this push rod 21
b pushes the lower protruding portion 17d of the arm 17 so that the tip 17a side of the arm 17 is
Is pivoted upward in a circular arc centered on, and retracts from the displacement passage R of the tilting pallet 4.

At this time, the claw portion 22a of the hook 22 engages with the engaged portion 17f of the arm 17 to restrain the arm 17 from being retracted from the displacement passage R.

When the user turns on the lowering switch SD and rotates the electric motor 9 in the unwinding direction of the chain 8, the rear side of the tilting pallet 4 is at the front end 4a. It is displaced downward about the horizontal pivot shaft 3.

The load of the tilt pallet 4 is applied to the chain 8 when the tilt pallet 4 is in the retracted posture when the vehicle is stored and when the tilt pallet 4 is being displaced vertically. For this reason, the bar member 26 to which the other end 8b side of the chain 8 is connected is pulled down by a force larger than the upward urging force of the compression coil spring 27, and is held by the steel plate 24.

When the chain 8 is unwound and the tilting pallet 4 is in the vehicle loading / unloading posture, the load on the chain 8 on the tilting pallet 4 becomes zero. Thereafter, the other end 8b of the chain 8 whose one end 8a is unwound is pushed upward through the rod member 26 by the upward urging force of the compression coil spring 27. At this time, the hook 22 is also rotated upward via the chain 28, and the engagement between the claw portion 22a and the engaged portion 17f of the arm 17 is released. As a result, the arm 17 released from the restraint by the hook 22 projects again into the displacement passage R of the tilting pallet 4 by its own weight and stops.

After the restraint of the arm 17 by the hook 22 is released in this manner, the head 2
6a is in contact with the switch lever 12b of the limit switch 12 for stopping the operation of unwinding the chain. Then, the limit switch 12 is operated, and the operation of unwinding the chain of the electric motor 9 is stopped.

To raise the tilt pallet 4, the electric motor 9 is rotated in the direction in which the chain 8 is wound by operating the raising operation switch SU.
When the tilting pallet 4 is displaced upward by the winding of the chain 8, the tilting pallet 4
The inclined surface 17C of the arm 17 protruding into the displacement passage R is abutted from below, and is rotated so as to be rubbed up and temporarily retracted from the displacement passage R. Eventually,
When the tilt pallet 4 has finished passing upward, the arm 17 is again moved by its own weight to the displacement path R of the tilt pallet 4.
To prevent the tilting pallet 4 from dropping.

When the tilting pallet 4 reaches the retracted position in the vehicle, the limit switch 11 for stopping the chain winding operation is operated to stop the electric motor 9 and stop the upward displacement operation of the tilting pallet 4. .

When the tilting pallet 4 is displaced downward from the posture in which the vehicle is stored, when the user turns on the lifting / lowering operation switch SU without pushing the push rod 21, the arm 17 is stopped. Then, the downward displacement operation of the tilt pallet 4 is forcibly interrupted. As a result, the rod member 26 is displaced upward by the action of the compression coil spring 27 and the limit switch 12 for stopping the chain unwinding operation is performed in the same manner as when the tilting pallet 4 is in the posture at the time of entering and leaving the vehicle. Working, the operation of the electric motor 9 stops. In this case, the user turns on the lifting operation switch SU and moves the tilt pallet 4
May be returned to the vehicle storage posture, and the proper lowering operation may be performed again.

As described above, according to the device for preventing the displacement body from falling according to the present embodiment, unlike the conventional device, no electric component such as a solenoid is used as means for operating the arm 17. As a result, material costs can be reduced,
No special control circuit is required. Therefore, the production cost can be reduced without sacrificing the safety of the parking device at all.

In order to displace the tilting pallet 4 downward from the storage position, the push rod 21 must be operated. This means
Before displacing the tilting pallet 4 downward, the user is forced to confirm the safety under the tilting pallet 4. Therefore,
Higher safety.

The device for preventing the displacement body from falling according to the present invention can be applied to a parking device of a type in which a pallet is moved up and down in a horizontal state, in addition to a tilting type parking device as described in this embodiment. . In any case, the flexible interlocking member can be displaced up and down by winding or unwinding one end of the flexible interlocking member, and can be widely applied to a machine having a displacement body that is held at a predetermined height by the flexible interlocking member. .

[0079]

According to the present invention, unlike the conventional one,
As a means for retracting the receiving member from the displacement passage at the time of the normal downward displacement operation of the displacement body, an electric component such as a solenoid is not used. Therefore, since the material cost is low and complicated control is not required, the manufacturing cost can be reduced.

In order to displace the displacement body downward from the holding position at a predetermined height, the retracting operation member must be operated without fail. This leads to forcing the user to confirm the safety under the displacement body before displacing the displacement body downward. Therefore, safety is high.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of the parking device of FIG. 2, and schematically shows an entire fall prevention device according to an embodiment of the present invention.

FIG. 2 is a schematic side view showing a parking device as an example of an application target of the present invention.

FIG. 3 is a diagram showing the parking device of FIG. 2 viewed from the direction of arrow A, and shows a tilting mechanism of a tilting pallet.

FIG. 4 is an enlarged perspective view of an essential part of FIG.

FIG. 5 is a front view of a main part of FIG. 4;

[Explanation of symbols]

 Reference Signs List 4 Pallet (displacement body) 7 Fixed part 8 Chain (flexible interlocking member) 8a One end of chain 8b The other end of chain 9 Prime mover 11 First detection means 12 Second detection means 13 Rotating body 17 Receiving member 21 Retreat operation Member 22 Restraining member 24, 26 Holding means 27 Urging means R Pallet displacement path

Claims (2)

(57) [Claims] The flexible interlocking member (8) is displaced up and down by winding or unwinding one end (8a) of the flexible interlocking member (8) and is held at a predetermined height by the flexible interlocking member (8). A device for preventing a displacement body (4) from falling from its holding position, wherein the rotation body is provided on the displacement body (4) and the flexible interlocking member (8) is wound around a lower side thereof. The displacement body (13) and the fixed part (7) slightly below the holding position of the displacement body (4) are rotatably provided so as to protrude and stop in the displacement passage (R) of the displacement body (4). Holding member (17), holding means (24, 26) for holding the other end (8b) side of the flexible interlocking member (8) against the load of the displacement body (4), The flexible interlocking member (8), which is smaller than the load of the displacement body (4), and
Urging means (27) for applying an upward urging force larger than the load on the other end (8b) of the flexible interlocking member (8).
A retreat operation member (21) for rotating the receiving member (17) to retreat from the displacement passage (R) of the displacement body (4); and a displacement passage (R) of the displacement body (4).
The stopper member (17) is engaged with the receiving member (17) retracted from the position, thereby restraining the receiving member (17) in a state of being retracted from the displacement passage (R) of the displacement body (4), and the urging means (27). ) Is applied to the holding means (24, 2).
6) When the load acting on the flexible interlocking member (8) is overcome, the upward movement of the other end (8b) of the flexible interlocking member (8) is mechanically interlocked to release the restraint of the receiving member (17). And a member (22). 2. An end (8a) side of a flexible interlocking member (8) is displaced up and down by being wound or unwound by a motor (9), and is moved up and down by the flexible interlocking member (8). An on-board pallet (4) held at a height,
A rotator (13) provided on the pallet (4) and wound around the flexible interlocking member (8) below the pallet (4);
A receiving member (1) rotatably provided on the fixed portion (7) slightly below the holding position of the pallet (4) so as to protrude into the displacement passage (R) of the pallet (4) and stop there.
7) a first detecting means (11) for detecting when the pallet (4) is displaced upward to reach the holding position and stopping the operation of the prime mover (9); Holding means (24, 26) for holding the other end (8b) side of the sex interlocking member (8) against the load of the pallet (4)
And an upward biasing force smaller than the load of the pallet (4) and larger than the load of the flexible interlocking member (8) is applied to the other end (8b) of the flexible interlocking member (8). Urging means (27), a retreating operation member (21) for rotating the receiving member (17) to retreat from the displacement passage (R) of the pallet (4), and a displacement of the pallet (4) Engaging with the receiving member (17) retreated from the passage (R), the receiving member (17) is restrained in a state of being retracted from the displacement passage (R) of the pallet (4), and the urging is performed. When the urging force of the means (27) overcomes the load applied to the holding means (24, 26), the upward movement of the other end (8b) of the flexible interlocking member (8) is mechanically performed. In conjunction with the receiving member (1)
7) a restraining member (22) for releasing the restraint, and the prime mover interlocking with the displacement operation of the flexible interlocking member (8) after the restraining member (22) releases the restraint of the receiving member (17). Second detection means (1) for stopping the operation of (9)
2) A parking device comprising: