JPH0739756B2 - Two-stage parking system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION I. Object of the Invention (1) Field of Industrial Application The present invention relates to a two-stage parking apparatus.

(2) Conventional technology Conventionally, in a general house or a parking lot, in order to effectively use a parking space, for example, a pallet is arranged on four columns in front and rear, and a pallet is extended by a wire extended from a winch in the column. A two-tiered parking device that guides up and down while suspending is used.

However, in this two-stage parking system, since guide rollers are provided on the columns to guide the pallet, the load of the vehicle body is applied to the guide rollers to increase the resistance, and a winch with a large output is required. Since the four corners of the pallet are hoisted at the same time, the installation was complicated and the failure was likely to occur. Therefore, the applicant pivotally attaches a pair of arm rods to both ends of both side frames of a frame of appropriate height to support the pallet, and a gate formwork at the upper ends of the arm rods at the ends of both side frames. A wire extended from the winch that is protrudingly installed on the gantry frame is linked to the gate formwork, and while operating the winch with the car body placed on the pallet, tilt the gate formwork in the winch direction and both side frames By rotating the arm rod pivotally attached to the upper part to raise the pallet and parking the other vehicle body in the space below the pallet, the pallet can be lifted and lowered easily without any resistance, and the winch also produces a large output. We proposed a two-stage parking system that is not needed as Japanese Patent Application No. 49684 in 1987.

(3) Problems to be Solved by the Invention However, in the two-tiered parking apparatus, the entire apparatus is bulky due to the gate formwork projecting upward, and it is impossible to stack vertically when transporting. Inconvenient to transport.

Further, when the winch wire linked to the gate form is cut while the pallet is being lifted, the pallet drops with the vehicle body and is damaged, which may cause an accident.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a main arm including an elevating pallet side arm and a gantry frame side arm bent at arbitrary angles at both ends of the gantry frame. And the end of the auxiliary arm are pivotally supported to support the lifting pallet, and the wire extended from the winch installed in the gantry frame is circulated to the quantity side frame, and the sheave mechanism is used to support the gantry frame side of the main arm. By raising and lowering the lifting pallet while rotating the main arm and auxiliary arm in conjunction with the arm, the device itself can be stacked vertically without being bulky, which makes it convenient to carry and further cuts the wire. A safety lock mechanism that automatically locks the rotation of the main arm to stop the lifting pallet when it does and a safety switch that stops the winch body are provided to improve the safety when cutting the wire. It is to provide a two-stage parking system.

II. Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention is a parking device for parking a vehicle body in upper and lower tiers, which has a hollow interior and a required height. The gantry frame 12, the arm mechanism 16 linked to the both side frames 14, 14 in the gantry frame 12, the lifting pallet 18 supported by the arm mechanism 16, and the lifting pallet 18 while operating the arm mechanism 16. The arm mechanism 16 is provided with a drive mechanism 20 for raising and lowering, and the arm mechanism 16 includes a frame frame side arm 34a integrally bent at an arbitrary angle and a lifting pallet side arm 34b, and the same bending portion is of the side frame. A main arm 34 pivotally attached to one end upper part and an end portion of an elevating pallet side arm 34b pivotally attached to the elevating pallet 18, and one end pivotally attached to the other end upper portion of the side frame 14 and the other end elevating pallet. And an auxiliary arm 36 pivotally attached to the base 18, and a mount for the main arm 34. Side arm 34a
The end portion includes at least an arm sheave 40 protruding from the side frame upper surface 14 side so as not to project, and the end includes an arm sheave 40. The drive mechanism 20 includes a winch body 64 installed on the gantry frame 12. A plurality of sheaves 66, 68 axially supported by the side frame 14 of the gantry frame 12, and a plurality of sheaves 66, 68 of the side frame 14 extending from the winch body 64 to the side frame 14 and the main sheave. The end of the arm 34 is hung on the arm sheave 40 of the arm 34 and the main arm 34
The drive wire 72 locked to the main arm 34 of the arm mechanism 16 while driving the winch body 64 to wind or unwind the drive wire 72 after the vehicle body is stored in the lifting pallet 18. And the auxiliary arm 36 are rotated to elevate and lower the elevating pallet 18
Composed of.

Further, the drive mechanism 20 includes a safety lock mechanism 74 that automatically locks the lift pallet 18 directly and automatically when the drive wire 72 is cut while the lift pallet 18 is being lifted, and the safety lock mechanism 74 is pivotally attached to the side frame 14. At a position in the vicinity of the lower part of the pivoted portion of the mounted main arm 34, the tooth pattern plate 76 erected on the side frame 14 so as not to hinder the rotation of the end of the frame frame side arm 34a of the main arm 34.
And a lock claw 78 pivotally attached to the tooth frame plate 76 at the end of the arm frame frame side arm 34a so that the end of the drive wire 72 is locked, and the lock claw 78 is attached to the tooth pattern plate 76. And a biasing spring 80 for biasing the locking wire to the lock plate, and when the drive wire 72 is wound and unwound, the lock claw 78 is disengaged from the toothed plate 76, and the lock claw 78 is cut when the drive wire 72 is cut. The main arm 34 may be locked by biasing the tooth pattern plate 76.

Further, the drive mechanism 20 includes a safety switch portion 82 for stopping the winch body 64 when the drive wire 72 is cut, and the safety switch portion 82 includes a tubular body 84 and the tubular body 84.
A weight 88 with a sheave 86 that is loosely fitted in the inside of the sheave 86, and a switch 90 that is installed above the weight 88 with the sheave 86 and that is turned on and off while the operating rod 90a contacts or separates from the sheave weight. , And the sheave 86 of the weight 88 with the sheave 86 is connected to the drive wire 72 in the circulating path of the drive wire 72.
While suspending with, the switch 90 is operated by the weight 88 with sheave 86 that descends when the drive wire 72 is cut, and the winch body 64
May be stopped.

(2) Action In the two-stage parking apparatus of the present invention, when the vehicle is loaded with the lifting pallet landed on the ground and the drive mechanism switch is turned on in that state, the drum of the winch body rotates normally. The first and second drive wires are wound.
Due to this entrainment, the arm sheave at the tip of the gantry side arm of the main arm is pulled toward the hoisting sheave in the working chambers in both side frames, and the main arm rotates, and the other lifting pallet side arm of the main arm moves to the side frame 14. The elevator pallet ascends around the bearing, and at the same time, the auxiliary arm linked to the main arm by the link rod also ascends and ascends, and the elevator pallet ascends in a stable state with four-point support. When touches, the winch body stops. Another vehicle is stored in the space below the lifting pallet stopped at this upper limit position.

When the upper car is unloaded, after the lower car is unloaded, the winch body is reversely operated to rewind the first and second drive wires wound on the drum and pivotally attached to both side frames. While the main arm rotates in the reverse direction, the lifting pallet descends and lands on the ground, and then leaves.

Therefore, according to the present invention, since the gantry-side arms of the main arm are projected into the both side frames of the gantry frame and are linked to the drive wires,
It is not bulkier than the height of the frame and is convenient for transportation.

Further, when the drive wire is cut, the lock claw provided at the end of the frame side arm of the safety lock mechanism engages with the toothed plate to automatically lock the rotation of the main arm and prevent the lifting pallet from falling. Further, the operation of the winch body is stopped at the same time by the operation of the micro switch of the safety switch section, so that the stability of the lifting pallet can be improved.

(3) Examples Hereinafter, preferred examples of the present invention will be described with reference to the accompanying drawings.

1 and 2 show a two-stage parking apparatus 10 according to an embodiment of the present invention.

In the figure, a two-stage parking device 10 includes a frame 12 having a hollow interior and a required height, an arm mechanism 16 linked to both side frames 14 and 14 in the frame 10, and a support mechanism supported by the arm mechanism 16. The lifting / lowering pallet 18 and the driving mechanism 20 for lifting / lowering the lifting / lowering pallet 18 while operating the arm mechanism 16 are provided.

The gantry frame 12 has a thickness of about 1 to 10 as shown in FIGS.
It is formed to have a height of about 2 m and is formed in a U-shape in a plan view with the continuous frame 22 which is continuously provided at the end portions of the both side frames 14 and 14. The base frames 14a, 14a of the both side frames 14, 14 are protruded toward the end in order to maintain the stability of the gantry frame 12, and
A bearing 24a and a bearing 24b for pivotally attaching a main arm and an auxiliary arm, which will be described later, of the arm mechanism 16 are provided at the upper end position of one end of 14 and the inner surface position of the other end.

Both side frames 1 provided with bearings 24a as shown in FIG. 8 and FIG.
A working chamber 26 for activating a main arm, which will be described later, of the arm mechanism 16 pivotally attached to the bearing 24a is provided at one end of each of the bearings 4, 14, and the working chamber 26 is provided above the upper frame 14b. Face plate 2
8, the end face frame 30 erected on the base frame 14a, the upper surface plate 28,
Face plates 3 attached to the inside and outside of the end frame 30, the base frame 14a, etc.
Surrounded by 2 and 32.

The arm mechanism 16 has two side frames as shown in FIGS. 1 and 2.
Main arms 34, 34 axially supported by bearings 24a, 24a at one end of each of 14, 14 and auxiliary arms 36, 36 axially supported by bearings 24b, 24b at the other end of both side frames 14, 14 respectively. have.

The main arm 34 comprises a frame frame side arm 34a and an elevating pallet side arm 34b which are integrally bent at an arbitrary angle as shown in FIGS. 10 to 13, and the frame frame side arm 34a has a hollow portion inside. The arm sheave 40 is formed by a bifurcated arm rod having 38, and an arm sheave 40 is pivotally supported at the end thereof.

The gantry frame side arm 34a and the lifting pallet side arm 34b are formed by integrally bending, but the present invention is not limited to this, and they may be individually formed and continuously abutted at an arbitrary angle.

Further, in the main arm 34, a mounting plate 44a is horizontally projected from the inner side of the bent portion 42 for mounting a connecting rod for interlocking with the auxiliary arm 36, and at the end of the lifting pallet side arm 34b. The frame rod 46 for connecting to the lifting pallet is horizontally fixed.

Further, one of the main frame-side arms 34a of the main arm 34 in which the bent portion 42 is pivotally supported by the bearing 24a of the side frame 14 of the gantry frame 12 is the side frame 14
Of the main arm 34 to the side frame.
The two-stage parking apparatus 10 can be stacked vertically without being provided above 14 and the convenience of transportation can be improved.

As shown in FIGS. 14 and 15, the auxiliary arms 36 and 36 are connected by a connecting frame 48 at a position near the shaft supporting portion by the bearings 24b and 24b, and at the same time, a connecting rod is attached for interlocking with the main arm 34. Board
44b is provided so as to horizontally project from the outer surface of the shaft supporting portion of the inclined auxiliary arms 36, 36.

As shown in FIGS. 1 and 2, the auxiliary arms 36 and 36 have their ends pivotally supported by bearings 24b and 24b on both sides of the frame, and the main arms 34 and the auxiliary arms 36 are mutually provided for interlocking. Both ends of the connecting rod 50 shown in FIGS. 16 and 17 are pivotally attached to the attached mounting plates 44a and 44b. The connecting rod 50 also rotates the auxiliary arm 36 in synchronism with the rotation of the main arm 34 to move the lifting pallet up and down in a stable four-point support state.

As shown in FIGS. 18 to 21, the lifting pallet 18 has a long plate 52 on which a vehicle body can be mounted, a reinforcing convex portion 54 provided in the central longitudinal direction of the plate 52, and the plate 52. It has stoppers 56 fixed to the ends and edge plates 58, 58 attached to both side ends.

Further, pivotal attachment portions 60 and 62 are provided at substantially intermediate positions of the edge plates 58 and 58 and a position close to the stopper 56, and the frame rods of the lifting pallet side arm 34b of the main arm 34 are provided on the pivotal attachment portions 60 and 62. 46 and the end of the auxiliary arm 36 are pivotally connected to each other.

The drive mechanism 20 includes a frame 12 as shown in FIGS. 1 and 2.
Winch main body 64 located in the connecting frame 22 and the first guide sheave 66 pivotally supported at lower positions of both ends of the connecting frame 2.
a, 66a, a second guide sheave 66b pivotally supported on the upper surface of the base frame 14a in the working chamber 26 of the side frames 14, 14, and a hoisting sheave 68 pivotally supported at a position below the end of the working chamber 26. , This winding sheave
A limit switch above the 68 to stop the winch body 64 by contacting the gantry side arm 34a as shown in FIG.
70, and first and second drive wires 72a and 72b that are respectively wound in the drum 64a of the winch body 64 in opposite directions and extended to the side frames 14 and 14 and wound around the sheaves.

The first and second drive wires 72a and 72b are first guide sheaves.
Second guide sheave 6 in working chamber 26 of both side frames 14, 14 from 66a
The arm sheave 40 and the hoisting sheave 68 at the tip of the gantry frame side arm 34a of the main arm 34 which is hung around 6b and further projected into the working chamber 26 are hung around as shown by dotted lines in FIGS. 1 and 25. And is locked to the gantry side arm 34a.

By winding the first and second drive wires 72a, 72b around the drum 64a of the winch body 64, the gantry side arm 34a of the main arm 34 together with the arm sheave 40 at the tip end is wound up by the sheave 68.
When the main arm 34 is pulled up, the lift pallet side arm 34b of the main arm 34 is rotated upward, and the auxiliary arm 36 is also rotated upward in conjunction with this. And limit switch 70
Thus, the winch body 64 is stopped and the lifting pallet 18 is held.

Next, by rewinding the first and second drive wires 72a and 72b, the lifting pallet side arm 34b and the auxiliary arm 36 rotate backward in the reverse direction.

In addition, the drive mechanism 20 includes the first and second drive wires 72.
Lifting pallet being lifted when either a or 72b is cut
A safety lock mechanism 74 is provided for preventing 18 drops and automatically locking.

As shown in FIGS. 7 and 8, the safety lock mechanism 74 includes a bent portion of the main arm 34 in each working chamber 26 of the side frames 14 and 14.
A half-moon tooth-shaped plate 76 erected so that the hollow portion 38 of the gantry-side arm 34a can pass under the bearing 24a to which 38 is pivotally attached,
As shown in FIGS. 10 and 11, a lock claw 78 pivotally mounted in the hollow portion 38 at a position near the arm sheave 40 of the gantry side arm 34a, and the lock claw 78 is fixed to the tooth pattern plate 76. For this purpose, the lock claw 78 and a biasing spring 80 stretched in the hollow portion 38 are provided, and the ends of the drive wires 72a and 72b move toward the lock claw 78 in the direction to release the bias of the lock claw 78. It is locked. As a result, when the drive wires 72a and 72b are pulled, the rack-side arm 34a rotates with the lock claw 78 released from the tooth pattern plate 76, and the drive wire 72a rotates while the rack-side arm 34a rotates.
If either a or 72b is disconnected, the lock claw 78 will bias the spring 80.
It is possible to prevent the lifting pallet 18 from falling by automatically biasing the pedestal side arm 34a non-rotatably by being biased and engaged with the tooth pattern plate 76 by the elastic force.

Further, the drive mechanism 20 stops the drive of the winch body 64 and pivotally attaches to the side frames 14 and 14 when any of the drive wires 72a and 72b is cut as shown in FIGS. 1 and 7. The rotation of the main arms 34, 34 that have been
The safety switch unit 82 for maintaining the balance of

As shown in FIGS. 22 to 24, the safety switch portion 82 has a tubular body 84 having an appropriate width and at least an upper end opened, and a shorter body than the tubular body 84 and fitted in the tubular body 84 so as to be vertically movable. It includes a combined weight 88 with sheave 86 and a microswitch 90 installed above the weight 88 with sheave 86.

The sheave 86-attached weight 88 has a shaft 92 continuously provided at a position near the upper side of the gap between the two sets of weights 88a and 88b, and the sheave 86 is suspended on the shaft 92. This cylindrical body 84 has wire through holes 94, 94 on both side surfaces which communicate with the gap between the weights 88a, 88b at the upper limit position where the upper surfaces of the weights 88a, 88b coincide with the upper surface of the cylindrical body and which face the lower position of the sheave 86. It has been opened.

The micro switch 90 is a support plate protruding from the cylindrical body 84.
It is fixed to 96, and the operating rod 90a of the microswitch 90 is turned on and off while coming into contact with or disengaging from the upper surface of the weight 88a.

The safety switch unit 82 includes the first and second drive wires 72a and 7a.
Installed in the side frames 14 and 14 forming the circulation path of 2b, insert the wire into the wire through holes 94, 94 of the cylindrical body 84 to support the sheave 86, and in this state, the micro switch 90 is turned on and the winch. The main body 64 is maintained in a driven state, and the first and second drive wires 72
When either a or 72b is disconnected, the weight 88 with the sheave 86 of the safety switch portion 82 on the disconnected side descends inside the cylindrical body 84, whereby the micro switch 90 is turned off and the winch body 64 is stopped.

Then, the two-stage parking apparatus 10 of the present invention is installed, for example, in the garden of a house, etc., and the automobile M1 is loaded with the lifting pallet 18 landed on the ground, and the switch of the drive mechanism 20 is turned ON in that state. In other words, the drum 64a of the winch body 64 is rotated forward and the first and second drive wires 72a and 72b are wound therein. Due to this entrainment, the arm sheave 40 at the tip of the gantry side arm 34a of the main arm 34 in the working chamber 26 in the both side frames 14 and 14 is pulled toward the hoisting sheave 68, and the main arm 34 is rotated, so that the main arm 34 The other lifting pallet side arm 34b rotates upward about the bearing 24a of the side frame 14,
At the same time, while the auxiliary arm 36 linked to the main arm 34 by the connecting rod 50 is also rotated upward, the elevating pallet 18 ascends in a stable state of four-point support, and the gantry side arm 34a is attached to the limit switch 70 in the working chamber 26. The winch body 64 stops upon contact. Another vehicle M2 is stored in the space below the lifting pallet 18 stopped at this upper limit position.

In addition, when the upper car M1 is unloaded, the lower car M2 is unloaded, and then the winch body 64 is reversely operated to be wound around the drum 64a.
When b is rewound, the elevating pallet 18 descends and lands on the ground while the main arm 34 pivotally attached to the both side frames 14 and 14 rotates in the reverse direction, and then leaves.

Therefore, according to the present invention, the gantry-side arms 34a of the main arms 34 are projected into the both side frames 14, 14 of the gantry frame 12 so that the drive wires 72a, 72
Since it is linked to b, it is not bulkier than the height of the gantry frame 12 and is convenient for transportation. Also, the drive wires 72a, 72b
Is cut, the lock claw 78 provided at the end of the gantry-side arm 34a in the working chamber 26 is engaged with the tooth pattern plate 76,
The rotation of 34 is automatically locked to prevent the lifting pallet 18 from falling, and the operation of the winch body 64 is also stopped at the same time by the operation of the micro switch 90 of the safety switch section 82 to improve the stability of the lifting pallet 18. It can be improved.

III. Effects of the Invention As described above, according to the two-stage parking apparatus according to the present invention, it is bent at an arbitrary angle to one end upper position of both side frames of the gantry frame having an appropriate height, and the lifting pallet side arm is provided. The bent part of the main arm consisting of the gantry frame side arm is pivotally attached, and the gantry side arm is projected into the side frame and linked with the drive wire extended from the winch body of the drive mechanism to wind and wind the drive wire. By moving the gantry side arm in the side frame by returning, the main arm and the auxiliary arm are interlocked, so that they can be stacked in sequence above the gantry frame, making them convenient for transporting the device without being bulky. I was able to improve.

Further, in the working chambers of the both side frames, a tooth pattern plate installed in the vicinity of the lower part of the pivotal attachment portion of the main arm and a lock pivotally attached to the frame frame side arm so as to urge and engage the tooth pattern plate. By providing a safety lock mechanism consisting of a pawl, the main arm is automatically locked by biasing the lock pawl to the tooth plate when the drive wire is cut, and the elevating pallet during elevating does not drop and is safe. The property is improved.

Furthermore, by providing a safety switch part for stopping the winch body when the drive wire is cut in the circulation path of the drive wire, the drive of the winch body is stopped simultaneously with the cutting of at least one drive wire and the winding of the other drive wire is stopped. There is no jamming or rewinding, and the lifting pallet can always be held horizontally to stabilize its balance.

[Brief description of drawings]

FIG. 1 is a side view of a two-stage parking apparatus according to an embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a plan view of a frame, and FIG. 4 is a rear view thereof. FIG. 5 is an enlarged plan view showing the first guide sheave provided on the back surface of the frame, FIG. 6 is an enlarged side view of the same, and FIG. 7 is a left side view in which a part of the frame is cut out. FIG. 8 is an enlarged left side view showing the main part, FIG. 9 is an enlarged sectional view taken along the line AA in FIG. 8, and FIG. 10 is an enlarged left side view showing the main arm. Figure is its enlarged plan view, Figure 12 is an enlarged front view of the main arm attached to the left frame, Figure 13 is an enlarged front view of the main arm attached to the right frame, and Figure 14 is the auxiliary arm. Fig. 15 is an enlarged left side view, Fig. 15 is an enlarged plan view showing a state in which auxiliary arms on both sides are continuously provided, and Fig. 16 is a partially enlarged side view of a connecting rod connecting the main arm and the auxiliary arm. FIG. 17 is a partially enlarged plan view thereof, FIG. 18 is an enlarged left side view of the lifting pallet, FIG. 19 is an enlarged plan view of the same, and FIG. 20 is a view taken along the line BB of FIG. , FIG. 21 is an enlarged cross-sectional view of the pivot portion at an intermediate position of the edge frame, FIG. 22 is an enlarged front view of the safety switch portion, FIG. 23 is an enlarged left side view of the same, and FIG. FIG. 23 is a view taken along the line CC in FIG. 23, and FIG. 25 is an enlarged left side view showing a usage state. 10 …… two-stage parking system, 12 …… frame, 14 …… side frame, 16
...... Arm mechanism, 18 ...... Lifting pallet, 20 ...... Driving mechanism, 24a, 24b ...... Bearings, 34 ...... Main arm, 34a …… Stand side arm, 34b …… Lifting pallet side arm, 36 …… Auxiliary arm , 40 ...... arm sheave, 42 ...... folding part, 64 ...... winch body, 72 ...... driving wire, 74 ...... safety lock mechanism, 76 ...... tooth template, 78 ...... lock claw, 80 ...... biasing Spring,
82 …… Safety switch section, 86 …… Sheave, 88 …… Weight

Claims (3)

[Claims] 1. A parking device for parking a vehicle body in upper and lower tiers, comprising a gantry frame having a hollow inside and a required height, an arm mechanism linked to both side frames in the gantry frame, and the arm mechanism. And a drive mechanism for moving the lifting pallet up and down while operating the arm mechanism. The arm mechanism includes a frame frame side arm integrally bent at an arbitrary angle, and a lifting pallet. A side arm, the same bent portion is pivotally attached to one end upper portion of the side frame, and the lifting pallet side arm end portion is pivotally attached to the lifting pallet, and the other end of the side frame has one end. An auxiliary arm that is pivotally attached and the other end of which is pivotally attached to an elevating pallet, and the gantry frame side arm end portion of the main arm is provided so as not to project at least to the side frame upper surface side, and , Arm supports pivoted at the end The drive mechanism includes a winch body installed on the gantry frame, a plurality of sheaves pivotally supported on a side frame portion of the gantry frame, and the side frame portion extending from the winch body to the side frame. A plurality of sheaves and a drive wire hooked around the arm sheave of the main arm and the end of which is locked to the main arm, and the winch body is driven after the vehicle body is stored in the lifting pallet. A two-stage parking system in which a main wire and an auxiliary arm of an arm mechanism are rotated while winding or unwinding a drive wire to elevate an elevating pallet. 2. The drive mechanism includes a safety lock mechanism that automatically locks the lift pallet directly and automatically when the drive wire is cut while the lift pallet is being lifted, and the safety lock mechanism is pivotally attached to a side frame. A tooth template installed on the side frame so as not to hinder the rotation of the arm frame side arm end of the main arm at a position near the lower part of the pivotal attachment part of the arm, and a tooth pattern plate at the arm frame side arm end of the main frame. A lock claw pivotably attached to the drive wire so that the end of the drive wire is locked; and a biasing spring for biasing the lock claw to the tooth pattern plate. 2. The lock arm according to claim 1, wherein the lock claw is disengaged from the tooth profile plate during winding and unwinding, and the main arm is locked by biasing the lock claw against the tooth profile plate when cutting the drive wire. Tiered parking system. 3. The drive mechanism includes a safety switch portion for stopping the winch body when the drive wire is cut, and the safety switch portion is loosely fitted in the cylinder body so as to be vertically movable. A sheave weight and a switch that is installed above the sheave weight and is turned on and off while the operating rod is in contact with or separated from the sheave weight. The two-stage according to claim 1 or 2, wherein the sheave of the weight is supported by the drive wire, and the winch body is stopped by operating the switch by the weight with the sheave that descends when the drive wire is cut. Parking device.