JP2001335293A5

JP2001335293A5 -

Info

Publication number: JP2001335293A5
Application number: JP2001060305A
Authority: JP
Filing date: 2001-03-05
Publication date: 2005-08-25
Anticipated expiration: 2021-03-05

Description

【０００５】
【課題を解決するための手段】
このような目的達成のため、本発明のジャッキ作動制御装置は、前輪および後輪を有して走行可能な車両上に作業装置を配設し、これら前輪および後輪にそれぞれ隣接して車両を持ち上げ支持する複数のジャッキを配設し、前輪および後輪のいずれか一方が駐車ブレーキにより制動される駐車制動輪からなるとともに他方が駐車ブレーキによる制動が行われない駐車非制動輪からなる作業車において、上記複数のジャッキのうちの駐車非制動輪に隣接して配設された非制動側ジャッキが駐車非制動輪の接地加重が第１の所定値となる第１持ち上げ位置から全伸長位置までの間にあるか全縮位置から上記第１持ち上げ位置までの間にあるかを検出する第１検出器と、上記複数のジャッキのうちの駐車制動輪に隣接して配設された制動側ジャッキが駐車制動輪の接地加重が第２の所定値となる第２持ち上げ位置から全伸長位置までの間にあるか全縮位置から上記第２持ち上げ位置までの間にあるかを検出する第２検出器とを備えて構成される。そして、第１検出器により非制動側ジャッキが全縮位置から第１持ち上げ位置までの間にあることが検出されているときには制動側ジャッキの伸作動を規制する。一方、第１検出器により非制動側ジャッキが全縮位置から第１持ち上げ位置までの間にあることが検出されており、且つ第２検出器により制動側ジャッキが第２持ち上げ位置から全伸長位置までの間にあることが検出されているときには非制動側ジャッキの縮作動を規制する。
0005
[Means for solving problems]
In order to achieve such an object, in the jack operation control device of the present invention, the work device is arranged on a vehicle that has front wheels and rear wheels and can travel, and the vehicle is placed adjacent to these front wheels and rear wheels, respectively. A work vehicle in which a plurality of jacks for lifting and supporting are arranged, and one of the front wheels and the rear wheels consists of parking braking wheels that are braked by the parking brake, and the other consists of parking non-braking wheels that are not braked by the parking brake. In the non-braking side jack arranged adjacent to the parking non-braking wheel among the plurality of jacks, from the first lifting position to the fully extended position where the ground contact load of the parking non-braking wheel becomes the first predetermined value. A first detector that detects whether it is between the two jacks or between the fully contracted position and the first lifting position, and a braking side jack arranged adjacent to the parking braking wheel among the plurality of jacks. The second detection that detects whether the ground contact load of the parking braking wheel is between the second lifting position and the fully extended position, which is the second predetermined value, or between the fully contracted position and the second lifting position. It is configured with a vessel. Then, when the first detector detects that the non-braking side jack is between the fully contracted position and the first lifting position, the extension operation of the braking side jack is regulated. On the other hand, the first detector detects that the non-braking side jack is between the fully contracted position and the first lifted position , and the second detector detects that the braking side jack is in the fully extended position from the second lifted position. When it is detected that it is between, the contraction operation of the non-braking side jack is restricted.

なお、第１検出器により非制動側ジャッキが全縮位置から第１持ち上げ位置までの間にあることが検出され且つ第２検出器により制動側ジャッキが全縮位置から第２持ち上げ位置までの間にあることが検出されている状態（例えば、全てのジャッキが未接地の状態）からジャッキを伸作動させる場合に、第１検出器により非制動側ジャッキが第１持ち上げ位置まで伸長したことが検出されるまで非制動側ジャッキの伸作動を許容して制動側ジャッキの伸作動を規制し、第１検出器により非制動側ジャッキが第１持ち上げ位置まで伸長したことが検出されたときには、制動側ジャッキおよび非制動側ジャッキの伸作動をともに許容する。
The first detector detects that the non-braking side jack is between the fully contracted position and the first lifted position, and the second detector detects that the braking side jack is between the fully contracted position and the second lifted position. When the jack is extended and operated from the state where it is detected that the jack is in the state (for example, all the jacks are not grounded), the first detector detects that the non-braking side jack is extended to the first lifting position. Allows the non-braking side jack to extend and regulates the braking side jack until it is extended, and when the first detector detects that the non-braking side jack has extended to the first lifting position , the braking side Both the jack and the non-braking side jack are allowed to extend.

このようにしてジャッキを伸作動させて車両を持ち上げ支持する場合には、最初は駐車非制動輪に隣接するジャッキの伸作動のみが可能（このとき制動側ジャッキの伸作動は規制されている）であり、第１検出器により非制動側ジャッキが第１持ち上げ位置まで伸長したことが検出されるまでこのジャッキを伸作動させる。このように非制動側ジャッキを伸作動させている間は、駐車制動輪は接地状態であり、駐車ブレーキにより制動された駐車制動輪が接地しているため坂道等においても車両が移動することなく非制動側ジャッキの伸長作動が可能である。この後において第１検出器により非制動側ジャッキが第１持ち上げ位置まで伸長したことが検出されたときには、制動側ジャッキおよび非制動側ジャッキの伸作動をともに許容するので、両ジャッキの伸長量を調整して車体を水平にした状態で持ち上げ支持することができる。
When the jack is extended to lift and support the vehicle in this way, only the extension of the jack adjacent to the parking non-braking wheel is initially possible (at this time, the extension of the braking side jack is restricted). This jack is extended until it is detected by the first detector that the non-braking side jack has been extended to the first lifting position. While the non-braking side jack is extended in this way, the parking brake wheel is in the ground state, and the parking brake wheel braked by the parking brake is in contact with the ground, so that the vehicle does not move even on a slope or the like. The non-braking side jack can be extended. After that, when the first detector detects that the non-braking side jack has extended to the first lifting position, both the braking side jack and the non-braking side jack are allowed to extend, so that the amount of extension of both jacks is increased. It can be adjusted to lift and support the vehicle body in a horizontal state.

【００３２】
【発明の効果】
以上説明したように、本発明によれば、非制動側ジャッキが第１持ち上げ位置から全伸長位置までの間にあるか全縮位置から第１持ち上げ位置の間にあるかを検出する第１検出器と、制動側ジャッキが第２持ち上げ位置から全伸長位置までの間にあるか全縮位置から第２持ち上げ位置までの間にあるかを検出する第２検出器とを備え、第１検出器により非制動側ジャッキが全縮位置から第１持ち上げ位置までの間にあることが検出されているときには制動側ジャッキの伸作動を規制し、第１検出器により非制動側ジャッキが全縮位置から第１持ち上げ位置までの間にあることが検出されており、且つ第２検出器により制動側ジャッキが第２持ち上げ位置から全伸長位置までの間にあることが検出されているときには非制動側ジャッキの縮作動を規制するようになっているので、車輪接地状態から駐車非制動輪を先に持ち上げる作動と、全車輪が持ち上げられた状態から駐車制動輪を先に接地させる作動とが上記第１および第２スイッチの作動の組み合わせに基づいて確実に規制される。このため、駐車非制動輪のみが接地して、坂道駐車等の場合に坂道に沿って車両が移動するようなことを確実に防止できる。
[0032]
【Effect of the invention】
As described above, according to the present invention, the first detection for detecting whether the non-braking side jack is between the first lifting position and the fully extended position or between the fully contracted position and the first lifting position. The first detector includes a device and a second detector that detects whether the braking side jack is between the second lifting position and the fully extended position or between the fully contracted position and the second lifting position. When it is detected that the non-braking side jack is between the fully contracted position and the first lifting position, the extension operation of the braking side jack is regulated by the first detector, and the non-braking side jack is moved from the fully contracted position by the first detector. When it is detected that the jack is between the first lifting position and the braking side jack is between the second lifting position and the fully extended position by the second detector, the non-braking side jack Since the contraction operation of the wheel is regulated, the operation of lifting the parking non-braking wheel first from the wheel contact state and the operation of first touching the parking braking wheel from the state where all the wheels are lifted are the above first. And it is definitely regulated based on the combination of the operation of the second switch. Therefore, it is possible to reliably prevent the vehicle from moving along the slope in the case of parking on a slope or the like because only the parking non-braking wheel touches the ground.

なお、第１検出器により非制動側ジャッキが全縮位置から第１持ち上げ位置までの間にあることが検出され且つ第２検出器により制動側ジャッキが全縮位置から第２持ち上げ位置までの間にあることが検出されている状態（例えば、全てのジャッキが未接地の状態）からジャッキを伸作動させる場合に、第１検出器により非制動側ジャッキが第１持ち上げ位置まで伸長したことが検出されるまで非制動側ジャッキの伸作動を許容して制動側ジャッキの伸作動を規制し、第１検出器により非制動側ジャッキが第１持ち上げ位置まで伸長したことが検出されたときには、制動側ジャッキおよび非制動側ジャッキの伸作動をともに許容するのが好ましい。このようにしてジャッキを伸作動させて車両を持ち上げ支持する場合には、最初は駐車非制動輪に隣接するジャッキの伸作動を第１持ち上げ位置まで行うことのみが可能である。駐車非制動輪が第１持ち上げ位置まで持ち上げられるまでの間は駐車制動輪は接地状態であり、駐車ブレーキにより制動された駐車制動輪が接地しているため坂道等においても車両が移動することなくジャッキの伸長作動が可能である。 The first detector detects that the non-braking side jack is between the fully contracted position and the first lifted position, and the second detector detects that the braking side jack is between the fully contracted position and the second lifted position. When the jack is extended and operated from the state where it is detected that the jack is in the state (for example, all the jacks are not grounded), the first detector detects that the non-braking side jack is extended to the first lifting position. Allows the non-braking side jack to extend and regulates the braking side jack until it is extended, and when the first detector detects that the non-braking side jack has extended to the first lifting position , the braking side It is preferable to allow both the jack and the non-braking side jack to extend. When the jack is extended to lift and support the vehicle in this way, it is only possible to initially extend the jack adjacent to the parking non-braking wheel to the first lifting position. The parking brake wheels are in contact with the ground until the non-parking brake wheels are lifted to the first lifting position, and the parking brake wheels braked by the parking brake are in contact with the ground, so the vehicle does not move even on slopes. The jack can be extended.

Claims

A vehicle capable of traveling with front wheels and rear wheels, a working device disposed on the vehicle, and a plurality of jacks provided adjacent to the front wheels and the rear wheels to lift and support the vehicle; With
A work vehicle jack operation control device comprising a parking brake wheel that is braked by a parking brake and one of the front wheel and the rear wheel is not parked by a parking brake.
Among the jacks, a non-braking side jack disposed adjacent to the parking non-braking wheel is located between a first lift position where the grounding load of the parking non-braking wheel is a first predetermined value and a fully extended position. A first detector for detecting whether it is between the fully contracted position and the first lift position;
A brake-side jack disposed adjacent to the parking brake wheel of the jack is between a second lift position where the grounding load of the parking brake wheel is a second predetermined value and a fully extended position. Or a second detector for detecting whether it is between the fully contracted position and the second lifted position,
When the first detector detects that the non-braking side jack is between the fully retracted position and the first lifting position, the extension operation of the braking side jack is restricted,
The first detector detects that the non-braking side jack is between the fully retracted position and the first lifting position , and the second detector raises the braking side jack to the second lifting position. A work vehicle jack operation control device that restricts a contraction operation of the non-braking side jack when it is detected that the position is between a position and the full extension position.

The first detector detects that the non-braking side jack is between the fully retracted position and the first lifted position, and the second detector detects the braking side jack from the fully retracted position to the second position. When extending the jack from a state where it is detected that it is between the lifted position,
Until the non-braking side jack is detected by the first detector to be extended to the first lifting position, the non-braking side jack is allowed to extend, and the braking side jack is restricted from extending.
When the first detector detects that the non-braking side jack is extended to the first lifting position, the extension operation of both the braking side jack and the non-braking side jack is permitted. The jack operation control device for a work vehicle according to claim 1.

The first detector detects that the non-braking side jack is between the first lifted position and the fully extended position, and the second detector detects the brake side jack from the second lifted position. When the jack is contracted from a state where it is detected that it is between all extended positions,
As long as the contracting operation of the non-braking side jack is detected by the second detector from the second lifting position to the full extension position, the first detector To allow until it is detected that the non-braking side jack is reduced to the first lifting position,
Thereafter, the contraction operation of the brake side jack is permitted regardless of the detection by the second detector,
When the second detector detects that the braking-side jack is contracted to the second lifting position in response to the contracting operation of the braking-side jack, the contracting operation of the non-braking-side jack is performed as described above. The jack operation control device for a work vehicle according to claim 1, wherein the device is configured to allow the detection regardless of the detection by the first detector.

A foot brake that brakes both the front wheel and the rear wheel; and a foot brake operation detector that detects the operation of the foot brake, and the operation of the foot brake is detected when the foot brake operation detector detects the operation of the foot brake. The jack operation control device according to any one of claims 1 to 3, wherein the operation of all the jacks is allowed regardless of detection by the first and second detectors.

The first detector is on when the non-braking side jack is between the fully retracted position and the first lifted position and when it is between the first lifted position and the fully extended position. -Consists of a first switch that reverses OFF,
The second detector is turned on when the braking side jack is between the fully retracted position and the second lifted position and when it is between the second lifted position and the fully extended position. The jack operation control device according to any one of claims 1 to 4, wherein the jack operation control device is configured by a second switch in which OFF is reversed.