JPH11246177A - Automatic jack protruding equipment and automatic jack housing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To support a car body with wheels braked by means of a parking brake and jacks in automatically protruding and housing the jacks. SOLUTION: A high lift work vehicle 10 is provided with rear wheels R capable of being braked by means of a parking brake at the rear part of a car body 11 and front wheels F at the front of the car body 11. In this case, automatic protruding and automatic housing are applied to front and rear jacks 15, 16 constituted to stably support the vehicle body in the overhung state after the housed state. In the automatic protrusion, the front wheels F are previously floated by applying a protrusing operation to the rear jacks 16 after elapsing a given protrusing period. In the automatic housing, the rear wheels R are previously grounded by applying a housing operation to the front jacks 15 after elapsing a given housing period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic jack extension device and an automatic storage device which can be freely extended and stored in a vehicle body.

[0002]

2. Description of the Related Art Jacks are attached to the front, rear, left and right of a working vehicle such as an aerial working vehicle or a crane truck having a boom that can freely move up and down on a vehicle body. When the boom is raised and extended to perform work at high places, these jacks are grounded, and the moment acting on the body in the direction of tipping over based on the weight of the boom and the load at the tip (hereinafter, “ (Referred to as "overturning moment").

The jacks provided on the front, rear, left and right sides of the vehicle body
By operating an operating device such as an operating lever provided corresponding to each jack, the jacks can be freely extended and stored separately. Further, there has been known an aerial work vehicle provided with an automatic jack extension device and an automatic storage device so that the jack can be easily extended and stored. In these devices, all the jacks are extended or retracted by operating only one operation switch.

A work vehicle equipped with such a jack is constructed on the basis of a truck capable of traveling on a general road, so that a front or rear wheel can be braked by a parking brake. When the jack is overhanged to perform work at a high place, the wheels (for example, rear wheels) that are being braked by the parking brake are rearwardly mounted rather than the wheels (for example, front wheels) that are not being braked by the parking brake. Make them rise.
When the overhanging jack is stored, the rear wheels braked by the parking brake are brought into contact with the ground before the front wheels.

[0005] This is because, for example, when the jack is extended and retracted on a slope, when the vehicle body is supported by the front wheels and the rear jack that are not braked by the parking brake, the rear jack slips. This is because the aerial work vehicle may move. For this reason, when the jack is extended by the automatic extension device, the rear jack is extended from the rear, and when the jack is retracted by the automatic storage device, the rear jack is reduced first, so that the rear wheel that is braked by the parking brake is used. And the front jack supports the vehicle body.

In order to perform such automatic extension and automatic storage, it is necessary to extend the rear jack after detecting that the front jack is completely extended, or to confirm that the rear jack is completely retracted. After the detection, the front jack was reduced. Alternatively, the rear jack is extended or the front jack is reduced after detecting that the rear wheel is overhanging (ground contact force) and that the rear wheel is surely overhanging.

[0007]

However, such a detector for detecting the amount of expansion and contraction of the jack, a detector for detecting whether or not the jack is stored, or a grounding detection for detecting the overhang state of the tire. Since such detectors are expensive, there is a problem that providing these detectors leads to an increase in the price of an aerial work vehicle. Also, if the rear jack is extended after the front jack is completely extended, or the front jack is reduced after the rear jack is completely retracted, the vehicle body will rise significantly forward. there were.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and has a simple structure, is inexpensive, and does not increase the inclination angle of the vehicle body in the front-rear direction. It is an object of the present invention to provide a jack automatic grounding device and an automatic storage device in which a vehicle body can be supported by a wheel that is sometimes braked by a parking brake and a jack provided on the opposite side of the wheel.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, an automatic jacking device for a working vehicle according to the present invention comprises:
A braking-side wheel (for example, a rear wheel R described in the embodiment) that can be braked by a parking brake is provided at one of the front and rear of the vehicle body, and a free-side wheel (for example, the embodiment) is provided at the front and rear of the vehicle body. In the vehicle provided with the front wheels F) described in (1), a plurality of jacks configured to stably support the vehicle body in a state where the jacks protrude from the stowed state are automatically extended. And a plurality of jacks are provided on the braking-side jack provided near the braking-side wheel (for example,
It comprises a rear jack 16) described in the embodiment and a free jack provided near the free wheel (for example, the front jack 15 described in the embodiment).

The overhang operation of each of these jacks is performed by an overhang operation means (for example, the control valve operating device 2 described in the embodiment).
The overhang operation control of each jack by the overhang operation means is performed by operating the overhang operation means (for example, the automatic overhang switch 17a described in the embodiment). Then, the overhang control means (for example, the extension restricting device 22a, the extension timer 22b, and the extension restriction canceling device 22c described in the embodiment) allows the overhang operation means to operate when the overhang operation means is operated. The overhang operation of the jack is started, and after the elapse of a predetermined time from the start of the overhang operation, the overhang operation of the braking-side jack by the overhang operation means is started.

In the jack automatic overhanging apparatus constructed as described above, when the overhanging operation means is operated, the overhanging operation of the braking side jack is regulated by the overhanging operation means, so that only the free side jack is provided. An overhang operation is performed. For this reason, at the time of jack extension operation, the braking-side wheel, which is always braked by the parking brake, separates from the ground later than the free-side wheel, so that the vehicle body can be supported by the braking-side wheel and the free-side jack. .

In the above-mentioned automatic jack overhanging device, the predetermined overhanging time during which the overhanging operation of the braking-side jack is restricted is set to substantially flat ground (ground without unevenness).
It is preferable to set a time corresponding to the extension operation time from when the overhang operation is performed to when a predetermined ground reaction force acts on the free jack. With this configuration, the vehicle body can be almost certainly supported by the braking-side wheel and the free-side jack without providing a detector for detecting the ground reaction force of the jack, and the overhang is provided. The inclination of the vehicle body in the front-rear direction after a predetermined time has elapsed can be suppressed to a small value.

[0013] In order to achieve the above object, a jack automatic storage device for a working vehicle according to the present invention is provided with braking-side wheels that can be braked by a parking brake when the vehicle is stopped at one of the front and rear of the vehicle body. , In a vehicle provided with free wheels on the other side of the front and rear of the body,
The automatic storage of a plurality of jacks configured to stably support the vehicle body in a state where the jacks protrude from the storage state is performed. The plurality of jacks include a braking-side jack provided near the braking-side wheel and a free-side jack provided near the free-side wheel.

The storage operation of each of these jacks is performed by storage operation means (for example, the control valve operating device 2 described in the embodiment).
The storage operation control of each jack by the storage operation means is performed by the operation of the overhang operation means (for example, the automatic storage switch 17b described in the embodiment). Then, when the storage operation means is operated by the storage control means (for example, the reduction control device 23a, the storage timer 23b, and the reduction restriction release device 23c described in the embodiment), the storage operation of the braking-side jack is performed by the storage operation means. And the storage operation of the free-side jack by the storage operation means is started after a lapse of a predetermined storage time from the start of the storage operation.

In the automatic jack storage device configured as described above, when the storage operation means is operated, the storage operation of the free side jack is regulated by the storage operation means, so that the storage operation of only the brake side jack is performed. Will be For this reason, when the jack is retracted, the braking-side wheel that has been braked by the parking brake always comes into contact with the ground first, and the vehicle body can be supported by the braking-side wheel and the free-side jack.

In the above-mentioned automatic jack storage device, the predetermined storage time during which the storage operation of the free-side jack is restricted is set to a predetermined inclination angle from the time when the overhang operation is performed on the substantially flat ground. (E.g., θ) in the embodiment, the predetermined inclination angle is set to the free side when the braking-side jack and the free-side jack are simultaneously reduced from the inclination angle on a substantially flat ground. It is preferable to set an inclination angle corresponding to the inclination angle at which the braking-side wheel contacts the ground before the wheel contacts the ground. With such a configuration, the vehicle body can be supported by the braking-side wheel and the free-side jack almost reliably when the jack is stored without providing a detector for detecting the amount of expansion and contraction of the jack. At the same time, the inclination of the vehicle body in the front-rear direction when the predetermined storage time has elapsed can be reduced.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an aerial work vehicle 10 equipped with an automatic jacking device for a work vehicle according to the present invention. This aerial work vehicle 10 is configured on the basis of a general truck that can travel on a road,
A rear wheel R (braking-side wheel) configured to be capable of being braked by a parking brake is provided behind the vehicle body 11, and a front wheel F (free-side wheel) is provided in front of the vehicle body. Aerial work vehicle 10
A turntable 12 is provided at the rear of the vehicle body 11 so as to be able to turn horizontally with respect to the vehicle body 11. Above the turntable 12, a boom 13 which is telescopically (nested) and is extendable is provided. Mounted up and down freely. Further, a work table 14 is attached to the tip of the boom 13, and an operator who boarded the work table 14 can turn the turn table 1.
2 and the boom 13 can be moved to a desired height through the operation of the boom 13.

In order to support the vehicle body 11 against the overturning moment acting on the vehicle body 11 when the boom 13 is raised and extended, the left front jack 15 and the right front jack A jack 15 ′ (free-side jack) is provided, and a left rear jack 16 and a right rear jack 16 ′ (braking-side jack) are provided on the right and left rear portions of the vehicle body 11.
Is provided. Since the jacks 15 and the like have the same configuration, the configuration will be described below using the left front jack 15 as an example. The jack 15 includes an outer post 15a attached to a side surface of the vehicle body 11, an inner post 15b inserted into the outer post 15a so as to be vertically expandable and contractable, and a jack cylinder 15d built in both posts 15a and 15b (see FIG. 1). Are not shown).

The jack cylinder 15d is a hydraulic expansion and contraction cylinder that performs expansion and contraction operations by controlling the supply and discharge of hydraulic oil supplied by a hydraulic pump (not shown) provided on the vehicle body 11. The upper end of the jack cylinder 15d is attached to the outer post 15a, and the lower end is attached to the inner post 15b. Then, the inner post 15 is extended by extending the jack cylinder 15d.
The vehicle body 11 can be supported on the ground by extending b downward and grounding the ground plate 15c attached to the lower end thereof.

Next, the jack 15 constructed as described above will be described.
An automatic jack extension device for projecting the jacks 15, 15 ', 16, 16' to support the vehicle body 11 in the aerial work vehicle 10 provided with the above will be described with reference to FIG. In the jack automatic overhanging device, an operation signal from an operation device 17 provided on the vehicle body 11 or the workbench 14 is transmitted to the controller 20, and the controller 20 transmits the operating oil to each jack 15 and the like based on the operation signal. Control valves 25, 25 ', 26 for performing supply / discharge control;
26 ', and the operation of each jack 15, 15', 1 is controlled.
The overhang operation of 6, 16 'is performed.

In the aerial work vehicle 10, the vehicle body 1
1. Jacks 15 and the like are provided on the front, rear, left and right of the vehicle 1. These four jacks 15 and the like perform supply / discharge control of hydraulic oil by control valves 25, 25 ', 26 and 26' provided correspondingly. This enables individual expansion / contraction operation control. However, in the automatic jack extension device according to the present invention, the left and right front jacks 15 and 15 'simultaneously perform the expansion and contraction operation, and the left and right rear jacks 16 and 16' simultaneously perform the expansion and contraction operation. For convenience, the left and right front jacks 15, 15 'are referred to as front jacks 15, and the left and right rear jacks 16, 16' are referred to as rear jacks 16.
The left and right front control valves 25, 25 'are also referred to as front control valves 25 for convenience, and the left and right rear control valves 26, 26' are also referred to as rear control valves 26 for convenience.

After the aerial work vehicle 10 is stopped at the position where the aerial work is performed, the parking brake lever (not shown) provided on the driver's seat is operated to apply braking to the rear wheel R by the parking brake. . Next, the front and rear jacks 15,
The operator operates the automatic extension switch 17a provided on the operation device 17 to perform the automatic extension of the sixteen. By this operation, an automatic extension operation signal is transmitted to the controller 20. The controller 20 that has received the automatic overhang operation signal transmits an operation signal for causing the front and rear control valves 25 and 26 to perform the extension operation from the control valve actuation device 21, and also controls the extension control device 22 a and the extension timer 22 b. Also sends the activation signal.

The extension restricting device 22a that has received the operation signal
Regulates the operation control of the rear control valve 26 regardless of the operation signal from the control valve operation device 21.
The extension timer 22b that has received the operation signal measures the time from when the automatic extension switch 17a is operated. Thus, when the automatic extension switch 17a is operated, first, the extension operation control of the front control valve 25 is performed, and only the front jack 15 performs the extension operation as shown in FIG.

The extension operation of only the front jack 15 is performed by the extension timer 22b provided in the controller 20.
For a predetermined time (predetermined overhang time). That is, until the predetermined overhang time has elapsed, the rear jack cylinder 16 by the rear control valve 26 is controlled by the expansion restricting device 22a also provided in the controller 20.
The extension operation control of d is regulated. The predetermined overhang time is a state in which the front wheel F is completely separated from the ground G when the aerial work vehicle 10 is stopped on a substantially flat ground and the front jack 15 is extended. This is a time corresponding to the extension operation time of the front jack 15 until a predetermined ground reaction force acts on the front jack 15.
Accordingly, if the extension time until the predetermined ground reaction force is applied is determined in advance, the predetermined ground reaction force can be almost surely provided even if the front jack 15 itself does not have a sensor for detecting the ground reaction force of the jack. The extension operation of the front jack 15 can be performed until the following is obtained.

In this manner, when the front jack 15 is extended until the ground contact force is obtained, the front load of the aerial work vehicle 10 is supported by the front jack 15 and the rear load is rearward. Although the vehicle is supported by the wheel R, the rear wheel R is braked by the parking brake. Therefore, even if the place where the aerial work vehicle 10 is stopped is on a slope, the front jack 15 is The vehicle body 11 does not move because the rear wheel R rotates while the vehicle slides on the ground G. Further, since the front jack 15 is not extended to the fully extended state, the inclination angle of the vehicle body 11 does not increase.

When the time measured by the overhang timer 22b has reached the predetermined overhang time, a restriction release signal is transmitted from the expansion restriction release device 22c to the expansion restriction device 22a. The extension restricting device 22a that has received the restriction release signal
Releases the regulation on the operation control of the rear control valve 26, and controls the extension control of the front and rear control valves 25 and 26 based on the operation signal of the control valve actuator 21. This allows
As shown in FIG. 1 (B), the front and rear jacks 15, 16 both extend and lift the vehicle body 11 while the vehicle body 11 is in a state of rising forward. Note that these extension restricting devices 22
a, Grounding timer 22b and extension restriction canceling device 22c
Constitute the overhang control means described in the claims.

Then, from the state where the extension amount of the front jack 15 is maximized (the state where the front jack cylinder 16d is extended to the stroke end), only the rear jack 16 performs the extension operation. This extension operation is performed until the vehicle body 11 becomes horizontal as shown in FIG. 3C. In this manner, the boom 13 is extended in a state where the jacks 15 and 16 in which the front and rear jacks 15 and 16 have the maximum extension amount are extended. An altitude operation is performed in which the work table 14 is moved to a desired altitude by performing the raising / extending operation.

Next, the front and rear jacks 15, 1
A case where storage is performed using the automatic jack storage device from the time when 6 is in the extended state will be described with reference to FIG. In the case of performing automatic storage from the extended state of the front and rear jacks 15, 16 as shown in (A), the automatic storage switch 17b of the operation device 17 is operated. By this operation, an automatic storage operation signal is transmitted to the controller 20. The controller 20 that has received the automatic storage operation signal,
The control valve operation device 21 transmits an operation signal for causing each of the control valves 25 and 26 to perform the reduction operation control, and also transmits an operation signal to the reduction control device 23a and the storage timer 23b.

Reduction control device 23a that has received the operation signal
Regulates the operation control of the front control valve 25 regardless of the operation signal from the control valve operation device 21.
The storage timer 23b that has received the activation signal measures the time from when the automatic storage switch 17b is operated. As a result, when the automatic storage switch 17b is operated, first, the reduction operation control of the rear control valve 26 is performed, and only the rear jack 16 performs the reduction operation as shown in FIG.

The reduction operation of only the rear jack 16 is performed by the storage timer 23b provided in the controller 20.
Is performed for a predetermined time (a predetermined storage time). That is, until the predetermined storage time has elapsed, the front jack cylinder 15 by the front control valve 25 is controlled by the reduction regulating device 23a also provided in the controller 20.
The reduction operation control of d is regulated.

The predetermined storage time is, as shown in FIG. 3B, on the substantially flat ground G, where the rear jack 1
This is the time required for the vehicle body 11 to fall rearward at the predetermined inclination angle θ by performing the reduction operation of only 6. When the front and rear jacks 15 and 16 are simultaneously reduced from this angle θ, the predetermined inclination angle θ is a state where the front wheel F is not in contact with the ground G as shown in FIG. This is an angle corresponding to the angle at which the rear wheel R completely touches the ground G and the state where the contact reaction force does not act on the rear jack 16. Accordingly, if the reduction time until reaching the predetermined inclination angle θ is determined in advance, it is almost certain that the rear jack 16 itself does not need to be provided with a sensor for detecting the amount of expansion and contraction of the jack until the predetermined inclination angle θ is reached. The reduction operation of the jack 16 can be performed.

When the time measured by the storage timer 23b reaches the predetermined storage time, a restriction release signal is transmitted from the reduction restriction release device 23c to the reduction restriction device 23a. Reduction regulation device 23a that has received the regulation release signal
Releases the restriction on the operation control of the rear control valve 26, and causes the control valves 25 and 26 to perform the reduction operation control based on the operation signal of the control valve operation device 21. As a result, as shown in FIG. 3B, while the vehicle body 11 is lowered rearward, the front and rear jacks 15, 16 both perform a reducing operation to lower the vehicle body 11. In addition, these reduction control devices 2
3a, storage timer 23b and reduction regulation release device 23
c constitutes the storage control means described in the claims.

Then, from the state in which the extension amount of the rear jack 16 is minimized (the state in which the rear jack cylinder 16d is reduced to the stroke end), only the front jack 15 performs the reducing operation. In this manner, the rear jack 16 is contracted only for a predetermined storage time and then both jacks 15 and 16 are stored, whereby the rear wheel R, which is being braked by the parking brake, comes into contact with the ground first.

For this reason, when the jack 15 and the like are overhanged, the aerial work vehicle 10 is in the same state as that supported by the front jack 15 and the rear wheel R, and the aerial work vehicle 1
Even if the place where 0 is stopped is on a slope, the vehicle body 11 does not move. Further, when the jack 15 or the like is stored, the inclination angle of the vehicle body 11 in the front-rear direction does not become large, so that work materials and the like placed on the vehicle body 11 do not roll.

In the above-described embodiment, when the front and rear jacks 15 and 16 are automatically extended (automatically stored), a signal for performing the operation of extending and retracting the front and rear jacks 15 and 16 is provided. It is transmitted at the same time, but the extension restricting device 22a continues until the predetermined overhang time (predetermined storage time) elapses.
(Reduction regulating device 23a), rear jack cylinder 1
The extension operation control of 6d (reduction operation control of the front jack cylinder 15d) is restricted. However,
The present invention is not limited to such a configuration. For example, the front and rear jacks 15 and 16 are automatically extended (automatic storage).
Is performed, signals for causing the front and rear jacks 15 and 16 to extend (retract) are not transmitted at the same time, but the front jack cylinder 15d is first expanded (the rear jack cylinder 16d is contracted). After performing control,
After a lapse of a predetermined time corresponding to the predetermined extension time or the predetermined storage time, control is performed to reduce the extension of the rear jack cylinder 16d (the front jack cylinder 15d) (so-called sequential operation with a timer delay). You may be comprised so that it may be made.

Further, in the above-described embodiment, the case has been described in which each jack 15 and the like are configured to perform the expansion and contraction operation by the hydraulic expansion and contraction cylinder. However, the present invention is not limited to such a configuration. The expansion and contraction operation may be performed using a power source other than the above. Further, the overhanging / retracting operation of the jack is not necessarily performed by the extension / contraction operation, and the overhanging / retracting operation may be performed by swinging the vehicle body up and down.

[0037]

As described above, in the jack automatic overhanging device according to the present invention, when the overhanging operation means is operated by the overhanging control means, the free-side jack starts overhanging operation by the overhanging operation means. At the same time, after the elapse of a predetermined time from the start of the overhanging operation, the overhanging operation of the braking-side jack by the overhanging operation means is started. For this reason, when the operation of the overhang operation means is performed, the overhang operation means first performs the overhang operation of only the free-side jack, and then performs the overhang operation of the braking-side jack. Therefore, at the time of jack extension operation, the braking-side wheel, which is always being braked by the parking brake, separates from the ground later than the free-side wheel, so that the vehicle body can be supported by the braking-side wheel and the free-side jack, At this time, the inclination angle of the vehicle body in the front-rear direction can also be reduced.

In the automatic jack overhanging device according to the present invention, the predetermined overhang time, which is the time during which the overhang operation of the braking-side jack is restricted, is maintained until the predetermined ground reaction force acts on the free-side jack. It is preferable to set the time corresponding to the elongation operation time. With such a configuration,
Even without a detector for detecting the ground reaction force of the jack, the vehicle body can be almost certainly supported by the braking-side wheel and the free-side jack. In addition, the inclination of the vehicle body in the front-rear direction at the time when the predetermined overhang time elapses can be reduced.

In the jack automatic storage device for a working vehicle according to the present invention, the storage control means starts the storage operation of the braking-side jack by the storage operation means when the storage operation means is operated, and also controls the storage operation. The storage operation of the free-side jack by the storage operation means is started after the elapse of a predetermined storage time from the start. For this reason, when the storage operation means is operated, the storage operation means first performs the storage operation of only the braking-side jack,
After that, the free side jack is retracted. Therefore, when the jack is retracted, the braking-side wheel that is always braked by the parking brake comes into contact with the ground before the free-side wheel, and the vehicle body can be supported by the braking-side wheel and the free-side jack. At this time, the inclination angle of the vehicle body in the front-rear direction can also be reduced.

In the above automatic jack storage device, the predetermined storage time, which is the time during which the storage operation of the free-side jack is restricted, is from the time when the overhang operation is performed to the time when the vehicle body tilts to the predetermined tilt angle. It is preferable that the predetermined inclination angle is set to an inclination angle corresponding to the inclination angle at which the braking-side wheel contacts the ground before the free-side wheel contacts the ground when the front and rear jacks are simultaneously reduced. With such a configuration, the vehicle body can be supported by the braking-side wheel and the free-side jack almost reliably when the jack is stored without providing a detector for detecting the amount of expansion and contraction of the jack. At the same time, the inclination of the vehicle body in the front-rear direction when the predetermined storage time has elapsed can be further reduced.

[Brief description of the drawings]

FIG. 1 is a side view of an aerial work vehicle provided with a jack automatic overhanging device according to the present invention, wherein (A) shows a state in which only a front jack is extended, and (B) shows a front and rear view. The state where the jack is extended is shown, and (C) shows the state where the overhang is completed.

FIG. 2 is a block diagram showing an automatic jack extension device and an automatic storage device according to the present invention.

FIG. 3 is a side view of an aerial work vehicle equipped with the above automatic jack storage device, wherein (A) shows a state of the jack before storage, and (B) shows a state in which only the rear jack is reduced. (C) shows a state in which the front and rear jacks are reduced.

[Explanation of symbols]

 Reference Signs List 10 aerial work vehicle 11 body 15 front jack 16 rear jack 20 controller

Claims (4)

[Claims] 1. A vehicle having braking-side wheels that can be braked by a parking brake at one of the front and rear sides of a vehicle body and having free-side wheels at the other front and rear sides of the vehicle body. An automatic jack extension device for automatically extending a plurality of jacks for stably supporting the vehicle body, wherein the plurality of jacks are located near a braking-side jack and a free-side wheel provided near the braking-side wheel. A projecting operation means for performing the projecting operation of each of these jacks; a projecting operation means for controlling the projecting operation of the projecting operation means; When operated, the overhanging operation of the free-side jack is started by the overhanging operation means, and after a lapse of a predetermined time from the start of the overhanging operation, the overhanging operation means is actuated. Jack automatic overhang apparatus characterized by comprising a protruding control means for starting the protruding operation of the brake-side jack. 2. The predetermined extension time corresponds to an extension operation time from when the free jack is extended on a substantially flat ground to when a predetermined ground reaction force acts on the free jack. The automatic jacking-out device according to claim 1, wherein the time is a time for performing the operation. 3. A vehicle having braking-side wheels that can be braked by a parking brake at one of the front and rear sides of a vehicle body and having free-side wheels at the other front and rear sides of the vehicle body. A jack automatic storage device that automatically stores a plurality of jacks that stably support the vehicle body, wherein the plurality of jacks are provided near a braking-side jack and a free-side wheel provided near the braking-side wheel. Storage operation means for performing a storage operation of each of these jacks, storage operation means for performing a storage operation control of the storage operation means, and a storage operation means when the storage operation means is operated. Means for starting the storage operation of the braking-side jack, and after a predetermined storage time has elapsed from the start of the storage operation, the storage operation means The jack automatic storage apparatus characterized by comprising a storage control means for starting the storing operation of the free jack. 4. The storage predetermined time is a time from when the storage operation of the braking side jack is performed to when the vehicle body tilts to a predetermined tilt angle, wherein the predetermined tilt angle is substantially flat. When the braking-side jack and the free-side jack are simultaneously reduced from this inclination angle, the inclination angle corresponds to the inclination angle at which the braking-side wheel contacts the ground before the free-side wheel contacts the ground. The automatic jack storage device according to claim 3, wherein