TW483843B - Protruded forklift - Google Patents

Abstract

This invention is to provide a method for shortening braking distance, and at the same time, to have a curb on preventing a forklift from rotating when braking as an object of this invention. When a rotational difference between a front wheel and a rear wheel excesses prescribed parameter, the rear wheel is slipping or locked, and moreover, there is also a need of judgment to brake the front wheel and then to brake the front wheel. Therefore, when a forklift with a load on fork 25 can also have enough brake so as to shorten braking distance in order to get a safe brake. In addition, whether the forklift is with a load or without a load, this invention can shorten braking distance, and at the same time, make no difference feeling when braking.

Description

五、發明說明（/ ) [發明所屬技術領域] 本發明係關於伸出式叉架升降機，特別有關其制動裝 置。 [習知技術] 第1 6圖爲表示習知的伸出式叉架升降機的側面圖。另 外第〗7圖爲槪·略地表示這種伸出式叉架升降機的上視 圖。伸出式叉架升降機I的車輛前部裝設有左右一對的 伸出_ 2。在一對的伸出腳2之間設置有支撐左右一對的 叉架3之可滑動的桅桿裝置4。於各伸出腳2的前端設置 有前輪5。一方補，在車輛後部設置具有駕駿座的機台7。 其機台7上配設有，作爲驅動輪及轉向輪功能的第1後 輪8和作爲支撐機台的支撐輪只隨著車輛的行進而從動 的第2後輪9。.而且，這樣的伸出式叉架升降機'上裝設了 僅用於制動第1後輪'8之'未圖不的制動裝置。 [發明欲解決之課題] 然而在如上述之習知的伸出式叉架升降機中，如第1 6 圖所示，一將負載1 0搭載於叉架3，在前輪5因負載1 〇 而引起之圖中反時鐘方向的力矩Μ 1產生效用，有時會減 少作用於後輪8之垂直向下的荷重（以下，稱爲「後輪 荷重」）。因此在搭載有負載I 〇的狀態下而予以制動時， 因後輪荷重的減少而容易產生後輪8的滑動，且雖僅加 上負載]0的重量也會使車輛整體之重量增加，有制動距 離變長的問題。 且制動力作用的第1後輪8如第1 7圖所示’因爲從車 叭張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 4838435. Description of the invention (/) [Technical field to which the invention belongs] The present invention relates to an outrigger forklift, and particularly to its braking device. [Conventional Technology] FIG. 16 is a side view showing a conventional extended fork lift. In addition, Fig. 7 is a schematic top view of the extended fork lift. A pair of left and right extensions 2 are installed at the front of the extended fork lift I of the vehicle. A slidable mast device 4 supporting a pair of left and right fork frames 3 is provided between the pair of protruding legs 2. A front wheel 5 is provided at the front end of each of the protruding feet 2. For one side, a machine 7 with a driver's seat is provided at the rear of the vehicle. The machine platform 7 is provided with a first rear wheel 8 functioning as a driving wheel and a steering wheel, and a second rear wheel 9 functioning as a support wheel supporting the machine platform. In addition, such an extended forklift 'is equipped with a braking device (not shown) for braking only the first rear wheel' 8 '. [Problems to be Solved by the Invention] However, as shown in FIG. 16 in the conventional outrigger fork lift, the load 10 is mounted on the fork 3, and the front wheel 5 is loaded by the load 10. The resulting moment M 1 in the counterclockwise direction in the figure is effective, and sometimes the vertical downward load on the rear wheel 8 may be reduced (hereinafter, referred to as "rear wheel load"). Therefore, when braking is performed while the load I 0 is mounted, the rear wheel 8 is prone to slip due to the reduction in the rear wheel load, and although only the load is added, the weight of the vehicle also increases the weight of the entire vehicle. The problem of longer braking distance. And the first rear wheel 8 with the braking force is shown in Figure 17 'because the size of the slave car applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 483843

經濟部智慧財產局員工消費合作社印製 五、發明說明（> ) 輛寬度方向的中心C朝單側偏離，所以制動時，對車輔 產生力矩，有時車輛會稍微轉動。 本發明係提供一種爲解決此種習知的問題而成者，可 謀求縮短制動距離，同時可減少因制動時車輛的旋轉量 之伸出式叉架升降機爲目的。 [解決課題之手段] 爲達成上述之目的，本發明之伸出式叉架升降機，其 特徵爲具備有··位於車輪後部，裝設有後輪的機台；形 成於該機台的駕駛座；位於車輪前部，具有左右一對前 輪之右左一對的伸出腳；可沿著該伸出腳滑動的桅桿裝 置；支撐於該桅桿裝置之左右一對的叉架；與制動作用 命令·運動1對該後輪進行制動之後輪制動裝置；用於檢 測該後輪之滑動的滑動的滑動檢測裝置；及在有該制動 作用命令時，依該滑動檢測裝置檢測出該後輪產生滑動 時對該前輪進行制動之前輪制動裝置。 而且該制動作用命令也可以在安全制動裝置作動狀態 時，或者，該安全制動裝置於非作動狀態下且加速裝置 被移動往與車輪彳了進方向之反方向時發出。且該安全制 動裝置係設於該駕駛座之制動踏板，以該制動踏板被踩 住時作爲該安全制動裝置的非作動狀態，而以該制動踏 板未被踩住時作爲該’安全制動裝置的作動狀態也可以。 另外，該後輪之發生滑動，也可以根據滑動速度來判 幾，或根據滑動比來判斷。而且，前輪制動裝置在前輪 停止時、前輪接近停止之低速時、加速裝置返回於中立 本紙張尺度適用中國國家標準（CNS)A4規格（2]0 X 297公釐） w m ,—^--------^---------線 (請先閱讀背面之注意事項再填寫本頁) 483843 A7 ___B7___ 五、發明說明（々） (請先閱讀背面之注意事項再填寫本頁) 位置時、加速裝置被移動往與車輛行進方向之相同方向 時、安全制動裝置爲非作動狀態時之中任一個場合時， 可形成解除前輪的制動之構成。 再者，上述伸出式叉架升降機，可具備有驅動叉架的 油壓泵和蓄存來自油壓泵的油以供給前輪制動裝置的蓄 壓器。 上述後輪係可作爲驅動輪之功能且設置於自車輛寬度 中心偏離位置，而上述前輪制動裝置爲對上述左右一對 的前輪同時進行制動作用。 [發明之實施形態] 以下，根據附件之圖面來說明此發明之實施形態。 第1 ·實施形態 第1圖係表示關於此發明實施形態1之伸出式叉架升 降機。伸出式叉架升降機2 1的車輛前部設置有朝前後方 向延長，在寬度方向分離隔開而相互平行之左右一對的 伸出腳22，各伸出腳的前端部安裝有前輪23，且一對的 伸出腳22之間設置有可沿著伸出腳滑動之桅桿裝置24。 而桅桿裝置24上有藉由升降夾子26而安裝之左右一對 的叉架2 5。 經濟部智慧財產局員工消費合作社印製 另一方面，車輛後部設置具有排列於車輛寬度方向之 駕駛座2 7及功能品室2 8的機台2 9功能品室2 8的下部 設置有作爲驅動輪及方向輪功能的第1後輪3 0。後輪3 0 設置於從車輛寬度方向的中心往左側偏離位置。另外駕 駛座27的下方配設有作爲支撐機台29的支撐輪且僅與 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 483843 A7 __B7_ 五、發明說明（4 ) (請先閱讀背面之注意事項再填寫本頁) 車輛行進從動之第2後輪3 1。且駕駛座2 7的地板面3 2 上配設有所謂的中斷式制動踏板3 3 ,亦即制動踏板3 3傺 作為安全制動裝置之功能，其在駕駛人一踩住制動踏板 3 3就解除制動，而不踩踏板的狀態下車輛不行進而進行 制動。 如第2圔所示，駕駛座2 7的前部設置有儀控板4 1，在 其上設有作為加速裝置的加速桿42，此外儀控板4 1内部 的加速桿42近傍設置有作動油可進入之油槽43和控制 作動油進出之油控制閥44。 形成在機台2 9的左側之功能品室2 8内，如第3圖所示 ，收納有載重馬達5 1、油壓泵5 2、驅動馬達5 3及後輸制 動裝置5 4。而驅動馬達5 3的下方連接有後輪3 0，形成依 驅動馬達5 3的驅動力使車輛行進。驅動馬達5 3上裝設有 用於撿測驅動馬達的回轉數，亦即與其連接之後輪3 0的 回轉數之後輪回轉數撿測器5 5 a和用於檢測驅動馬達5 3 的回轉方向，亦即與其連接之後輪3 0的回轉方向之回轉 方向撿測器5 5 b。而且後輪制動裝置5 4偽由制動驅動馬 達之回轉，藉以進行後輪3 0剎車之碟式制動器所成。 經濟部智慧財產局員工消費合作社印製 如第4圖所示，駕駛座27的地板面32上所設置之制 動踏板3 3經由連桿機構6 1連拉姪後輪制動裝置5 4，駕 駛人將腳離開制動踏板3 3 ,制動踏板3 3朝上方上昇時， 其動作經由連桿機構6 1傳達至後輪制動裝置5 4 ,則後輸 制動裝置5 4則制止驅動馬達5 3及其下方之後輪3 0的回 轉。反之，制動踏板3 3被駕駛人踩住時，則後輪制動裝 置54被解除而且制動踏板33的下方配設有制動開關 - 6 - 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱) 483843 A7 B7 五、發明說明（r ) 62，制動踏板3 3被踩住一往下方移動，則因制動開關62 的作動片被壓，藉此制動開關62可以輸出中判斷制動的 解除信號。 如第5圖所示，在油控制閥44前面的由載重馬達5 1 而來的油流入口上裝設有將油路分歧的第1配件7 1，形 成可供給油至前輪制動油壓回路。 在第6及第7圖中，從第1配件7 1分歧的第1供給管 81連接蓄壓器82，而第1供給管具有止回閥83及蓄壓 器蓄壓切換閥84。而蓄壓器蓄壓切換閥84爲電磁閥，由 載重馬達前方所設置的控制器1 〇 1控制其開閉。往蓄壓 器8 2流入的管路上安裝有壓力檢測器8 5。而由壓力檢測 器8 5所檢測出之壓力數値係作爲用於控制蓄壓器蓄壓切 換閥84之開閉的數値而朝控制器1 0 1輸出。而且蓄壓器 82經第2供給管86，再經由制動配管87連接至左右一 對之前輪制動裝置1 Π。而在第2供給管8 6的途中設置 有制動增壓閥89。且第2供給管86與制動配管87之間 有經由配件9 0而連接的回流管9 2，而回流管9 1的下流 端連接至油槽43。且回流管9 1的途中設有制動減壓閥 92。上述制動增壓閥89及制動減壓閥92皆爲電磁閥， 由控制器1 〇 1控制其開閉。此外在配件9 0之壓力數値是 由壓力檢測器9 3測量而輸入至控制器1 〇 1。 如第8圖所示，各前輪23上裝設由鼓式制動器所成之 前輪制動裝置1 1 1。而前輪制動裝置1 Π係以螺栓固定在 溶接於伸出腳2 2的軸部1 1 2，而軸部Π 2上經由軸承 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁)Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention () The center C of the vehicle width direction deviates to one side, so when braking, a torque is generated to the auxiliary vehicle and the vehicle may rotate slightly. The present invention aims to provide an extended fork lift that can reduce the braking distance and reduce the amount of rotation of the vehicle during braking while solving the conventional problems. [Means for Solving the Problems] In order to achieve the above-mentioned object, the extended fork lift of the present invention is provided with a machine provided at the rear of the wheel and equipped with a rear wheel; a driver seat formed on the machine ; Located at the front of the wheel, with a pair of right and left pair of protruding feet on the left and right front wheels; a mast device that can slide along the protruding feet; a pair of left and right forks supported by the mast device; Movement 1 brakes the rear wheel, a rear wheel braking device; a slip detection device for detecting the slip of the rear wheel; and when the braking action command is given, when the rear wheel slip is detected by the slip detection device Front wheel braking device for braking the front wheel. Also, the braking action command may be issued when the safety brake device is in an activated state, or when the safety brake device is in an inactive state and the acceleration device is moved in a direction opposite to the direction in which the wheels are advanced. And the safety brake device is provided on the brake pedal of the driver's seat. When the brake pedal is depressed, it is regarded as a non-actuated state of the safety brake device, and when the brake pedal is not depressed, it is regarded as the safety brake device. The operating state is also possible. In addition, the occurrence of slippage of the rear wheel can also be determined based on the slip speed or the slip ratio. In addition, the front wheel braking device returns to neutral when the front wheel is stopped, when the front wheel is near to a low speed, and the acceleration device returns to neutral. This paper size applies the Chinese National Standard (CNS) A4 specification (2) 0 X 297 mm) wm,-^ --- ----- ^ --------- line (please read the precautions on the back before filling this page) 483843 A7 ___B7___ 5. Description of the invention (々) (please read the precautions on the back before filling in this Page) When the acceleration device is moved in the same direction as the vehicle's direction of travel, or when the safety brake device is in the non-actuated state, the brakes on the front wheels can be released. Further, the above-mentioned extended fork lift may include a hydraulic pump that drives the fork and a pressure accumulator that stores oil from the hydraulic pump to supply the front wheel brake device. The above-mentioned rear wheel train can function as a driving wheel and be disposed at a position deviated from the center of the vehicle width, and the above-mentioned front wheel braking device simultaneously brakes the left and right front wheels. [Embodiments of the invention] Hereinafter, embodiments of the invention will be described with reference to the drawings of the attachment. 1st Embodiment Fig. 1 is a view showing an extension type forklift lifter according to a first embodiment of the present invention. A pair of left and right pair of extension legs 22 extending in the front-rear direction and extending apart from each other in the width direction are provided at the front of the vehicle of the extension fork lift 21, and front wheels 23 are installed at the front end of each extension leg A mast device 24 is provided between the pair of protruding feet 22 and can slide along the protruding feet. On the other hand, the mast device 24 has a pair of left and right forks 25, which are mounted by a lifting clip 26. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. On the other hand, the rear of the vehicle is provided with a driver seat 2 7 and a functional product room 2 8 arranged in the vehicle width direction. The lower part of the 9 functional product room 2 8 is provided as a drive. Wheel and steering wheel function of the first rear wheel 30. The rear wheels 30 are provided at positions deviated from the center in the vehicle width direction to the left. In addition, a support wheel serving as a support table 29 is provided below the driver's seat 27, and the Chinese national standard (CNS) A4 specification (210 X 297 mm) is only applicable to this paper size. (Please read the precautions on the back before filling out this page.) The second rear wheel 31 of the driven vehicle. The floor surface 3 2 of the driver's seat 2 7 is provided with a so-called interrupted brake pedal 3 3, that is, the brake pedal 3 3 傺 functions as a safety braking device, which is released as soon as the driver steps on the brake pedal 3 3. Brake without braking the vehicle without pedaling. As shown in Fig. 2A, the instrument control board 41 is provided at the front of the driver's seat 27, and an acceleration lever 42 as an acceleration device is provided thereon. In addition, the acceleration lever 42 inside the instrument control board 41 is provided with an operation nearby. An oil tank 43 through which oil can enter, and an oil control valve 44 that controls the movement of oil into and out of it. Formed in a functional product room 28 on the left side of the machine table 29, as shown in FIG. 3, a load motor 51, a hydraulic pump 5, a drive motor 5 3, and a rear brake device 54 are housed. A rear wheel 30 is connected below the driving motor 53 to drive the vehicle in accordance with the driving force of the driving motor 53. The drive motor 5 3 is provided with a detector 5 5 a for detecting the number of revolutions of the drive motor, that is, the number of revolutions of the rear wheel 30 and the rear wheel revolution number 5 5 a and a direction of rotation of the drive motor 5 3. That is, the turning direction detector 5 5 b connected to the turning direction of the wheel 30 after connecting to it. Furthermore, the rear wheel braking device 54 is a disc brake that is driven by the brake to drive the motor to perform rear wheel 30 braking. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, as shown in FIG. 4, the brake pedal 3 3 provided on the floor surface 32 of the driver ’s seat 27 is pulled through the link mechanism 6 1 and the rear wheel brake device 5 4 is connected. When the foot is lifted off the brake pedal 3 3 and the brake pedal 33 is raised upward, its action is transmitted to the rear wheel braking device 5 4 via the link mechanism 6 1, and the rear input braking device 5 4 stops the driving motor 5 3 and below After 30 rounds of rotation. Conversely, when the brake pedal 3 3 is depressed by the driver, the rear wheel braking device 54 is released and a brake switch is provided under the brake pedal 33-6-This paper size applies to China National Standard (CNS) A4 (210 X 297 public love) 483843 A7 B7 V. Description of the invention (r) 62, the brake pedal 3 3 is pressed down and moved downwards, because the brake pad 62 is pressed, so that the brake switch 62 can judge the brake Cancel the signal. As shown in FIG. 5, a first fitting 7 1 for branching the oil passage is installed at the oil flow inlet from the load motor 5 1 in front of the oil control valve 44 to form a hydraulic circuit for supplying oil to the front wheel brake. . In the sixth and seventh figures, the first supply pipe 81 branched from the first fitting 71 is connected to the accumulator 82, and the first supply pipe includes a check valve 83 and an accumulator pressure-storing switching valve 84. The accumulator accumulator switching valve 84 is a solenoid valve, and its opening and closing is controlled by a controller 101 provided in front of the load motor. A pressure detector 85 is installed in the pipeline flowing into the accumulator 82. The pressure number detected by the pressure detector 85 is output to the controller 101 as a number for controlling the opening and closing of the pressure accumulator switching valve 84. The accumulator 82 is connected to the left and right pair of front wheel brake devices 1 Π via the second supply pipe 86 and then via the brake pipe 87. A brake booster valve 89 is provided in the middle of the second supply pipe 86. A return pipe 92 is connected between the second supply pipe 86 and the brake pipe 87 via a fitting 90, and a downstream end of the return pipe 91 is connected to the oil tank 43. A brake pressure reducing valve 92 is provided in the middle of the return pipe 91. The above-mentioned brake booster valve 89 and brake decompression valve 92 are solenoid valves, and their opening and closing are controlled by a controller 101. In addition, the pressure number 配件 of the accessory 90 is measured by the pressure detector 93 and input to the controller 101. As shown in Fig. 8, each front wheel 23 is provided with a front wheel braking device 1 1 1 made of a drum brake. The front wheel braking device 1 Π is bolted to the shaft portion 1 1 2 which is fused to the protruding foot 2 2, and the shaft portion Π 2 passes the bearing. The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 male). Li) (Please read the notes on the back before filling in this page)

裝--------訂·---I----線J 經濟部智慧財產局員工消費合作社印製 ^3843 A7 B7 i、發明說明（^ ) 1 1 3、1 1 4壓入有輪1 1 5，輪1 1 5藉由螺母1 1 6以蓋1 1 7 限制住。輪Π 5其圓筒內面被加工成可作爲制動鼓輪的 功能，藉由其內面和前輪制動裝置1 1 1的襯裡之接觸形 成摩擦制動之效用。且輪胎1 1 8側面的基帶部1 1 9上形 成凹凸，由以螺栓固定在伸出腳22下部之前輪回轉數檢 測器1 20檢測其凹凸以測量前輪的回轉數。 接著就上述伸出式叉架升降機的動作加以說明。首先 伸出式叉架升降機2 1在停車狀態時，亦即駕駛座2 7內 未乘坐駕駛人時，制動踏動3 3爲上昇狀態，此狀態爲安 全制動裝置的作動狀態。這樣的制動踏板3 3的資訊經由 制動開關62送至控制器1 0 1，控制器1 0 1將其資訊辨識 爲「·制動作用命令」而使後輪制動裝置54作用對後輪執 行制動。再者，此時控制器1 0 1也收到前輪23停止的資 訊，亦即前輪23的回轉數爲零之資訊，因此前輪制動裝 置1 1 1就照這樣被解除。照這樣制動踏板3 3在車輛停止 時亦可作爲停車制動器之功能。 接著就叉架25上未搭載荷重的狀態之制動作用加以說 明。使伸出式叉架升降機2 1行進時，首先駕駛人一踏制 動踏板3 3，亦即安全制動裝置爲非作動狀態，則解除「制 動作用命令」、而解除後輪制動裝置5 4作用於後輪3 0之 制動。然後駕駛人一將加速桿42朝車輛前方搖動，則其 動作係作爲加速桿前進後退信號送至控制器1 0 1而將驅 動馬達5 3驅動使車輛前進。接著使車輛減速或停止時， 一將加速桿42朝車輛後方搖動，則其動作作爲加速桿前 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) ，裝---- 訂---------% 經濟部智慧財產局員工消費合作社印製Packing -------- Order --- I ---- line J Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy ^ 3843 A7 B7 i. Description of the invention (^) 1 1 3, 1 1 4 Wheels 1 1 5 are inserted, and wheels 1 1 5 are restricted by covers 1 1 7 by nuts 1 1 6. The inner surface of the cylinder Π 5 is processed to function as a brake drum, and the friction braking effect is formed by the contact between the inner surface and the lining of the front wheel braking device 1 1 1. The base band portion 1 1 9 on the side of the tire 1 1 8 is uneven, and the number of revolutions of the front wheel is measured by the number of revolutions of the front wheel by a bolt number detector 1 20 that is fixed to the lower portion of the protruding leg 22. Next, the operation of the above-mentioned extended fork lift will be described. First, when the extended fork lift 2 1 is in the parking state, that is, when the driver is not in the driver's seat 2 7, the brake pedal 33 is in the rising state, and this state is the operating state of the safety braking device. Such information of the brake pedal 33 is sent to the controller 101 via the brake switch 62, and the controller 101 recognizes the information as a "brake action command" to cause the rear wheel braking device 54 to perform braking on the rear wheels. Moreover, at this time, the controller 101 also receives the information that the front wheel 23 is stopped, that is, the information that the number of revolutions of the front wheel 23 is zero, so the front wheel brake device 1 1 1 is released as such. In this manner, the brake pedal 33 can also function as a parking brake when the vehicle is stopped. Next, the braking effect of the fork 25 in a state where no load is applied will be described. When the extended fork lift 21 is traveling, the driver first depresses the brake pedal 3 3, that is, the safety brake device is in a non-actuated state, and the “brake action command” is released, and the rear wheel brake device 5 4 is acted upon. Brake on the rear wheel 30. Then, as soon as the driver shakes the acceleration lever 42 toward the front of the vehicle, his action is sent to the controller 101 as an acceleration lever forward and backward signal, and the driving motor 5 3 is driven to advance the vehicle. When decelerating or stopping the vehicle, as soon as the acceleration lever 42 is shaken toward the rear of the vehicle, its movement is used as the acceleration lever. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm). (Please read the back Please fill in this page for the matters needing attention). ---- Order ---------% Printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs

經濟部智慧財產局員工消費合作社印製 五、發明說明（7 ) 進後退信號送至控制器1 0 1，且此時依用於檢測後輪3 0 之回轉方向的回轉方向檢測器5 5 b亦將車輛前進之資訊 送至控制器1 0 1，因此控制器1 0 1辨識爲加速桿42被搖 動至車輛行進方向（前進方向）之反方向，將其狀態辨 識成「制動作用命令」，而使產生再生制動或反相制動力 以對後輪3 0進行制動。 另外，在行進中因某此因素駕駛人採取不正確之操作 姿勢或者從駕駛座27落下而腳一從制動踏板33離開， 則制動踏板3 3上昇而安全制動裝置的作動狀態。控制器 1 0 1將其資訊辨識爲安全制動裝置之「制動作用命令」， 即使沒有依加速桿42之「制動作用命令」也會使後輪制 動裝•置54產生作用而對後輪30進行制動，亦即制動踏 板33作爲安全制動裝置之功能。 接著就進行載重作業時主要參照第6圖加以說明。駕 駛人一操作載重桿，則與之相應的載重馬達起動，而直 接連接到載重馬達5 1的油壓泵回轉，然後油槽43內的 作動油被送至作動油控制閥44，此時由壓力檢測器8 5的 信號，被控制器1 〇 1判定蓄壓在蓄壓器82之作動油的壓 力較既定値爲低時，則由控制器1 〇 1使蓄壓器蓄壓切換 閥84開閥’而使畜壓器82內之油壓升局。而在蓄壓器 82內之油壓高於既定値時，則蓄壓器蓄壓切換閥84關閉 閥，而依止回閥83之作用以保持蓄壓器82內之油壓。 另一方面藉由蓄壓器蓄壓切換閥84之開閥，其油槽43 內之作動油流入作動油控制閥44再送至桅桿裝置24的 -9- 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注音心事項再填寫本頁)Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (7) The forward and backward signals are sent to the controller 1 0 1, and at this time, the rotation direction detector 5 5 b is used to detect the rotation direction of the rear wheel 30 The information of the vehicle's forward is also sent to the controller 101, so the controller 101 recognizes that the acceleration lever 42 is shaken to the opposite direction of the vehicle's traveling direction (forward direction), and recognizes its state as a "brake action command". The regenerative braking or reverse braking force is generated to brake the rear wheel 30. In addition, when the driver takes an incorrect operation posture or falls from the driver's seat 27 and his foot leaves the brake pedal 33 during travel, the brake pedal 33 is raised and the safety brake device is activated. The controller 101 recognizes its information as the "brake action command" of the safety brake device. Even if it does not follow the "brake action command" of the accelerator lever 42, it will cause the rear wheel brake device 54 to act on the rear wheel 30. Braking, that is, the function of the brake pedal 33 as a safety braking device. Next, a description will be given mainly with reference to FIG. 6 when carrying out a load operation. As soon as the driver operates the load lever, the corresponding load motor starts, and the hydraulic pump directly connected to the load motor 51 turns, and then the working oil in the oil tank 43 is sent to the working oil control valve 44. When the signal of the detector 85 is determined by the controller 101, the pressure of the hydraulic oil stored in the accumulator 82 is lower than the predetermined pressure, the controller 101 will open the accumulator pressure-storing switching valve 84. The valve 'causes the oil pressure in the livestock press 82 to rise. When the oil pressure in the accumulator 82 is higher than the predetermined pressure, the accumulator pressure storage switching valve 84 closes the valve, and the check valve 83 acts to maintain the oil pressure in the accumulator 82. On the other hand, by opening the accumulator accumulator switching valve 84, the working oil in the oil tank 43 flows into the working oil control valve 44 and then sends it to the mast device 24-9. This paper size applies to Chinese National Standard (CNS) A4 Specifications (210 X 297 mm) (Please read the phonetic notes on the back before filling out this page)

483843 A7 B7 五、發明說明（/) 升降油缸使叉架2 5動作以進行載重。 在叉架2 5上搭載載重的狀態下，駕駛人一將加速桿4 2 朝前方搖動，則其動作作爲加速桿前進後退信號被送至 控制器1 0 1而將驅動馬達驅動使車輛開始前進，然後駕 駛人爲了使車輛減速或停止而在前進中一將加速桿4 2朝 後方搖動’則與叉架2 5上未搭載載重狀態之制動作用時 相同，其動作被控制器1 0 1辨識爲「制動作用命令」，則 對後輪3 0制動。 另外，以叉架25上搭載有載重時而言，因其分量形成 增加車輛之重量且加大慣性力，形成需要有大於未搭載 載重狀態時之制動力。因此在對後輪3 0制動時，因車輛 的慣·性力大，而制動力不足，有時後輪3 〇會鎖住。如果 後輪3 0 —產生鎖定，依後輪回轉數檢測器5 5 a之檢測則 其狀態爲後輪3 0之回轉數大約等於零，也就是回轉速度 依其大約爲零可判定’另一方面’即使後輪3 〇鎖定，因 在那期間車輛爲前進中，從動輪的前輪2 3繼續回轉，由 依前輪回轉數1 2 0檢測之前輪回轉數檢測出回轉速度。 在這裡’後輪3 G未鎖定之狀態而言，前輪2 3和後輪3 〇 的回轉速度大約相同，雖然前輪23和後輪3 〇的回轉速 度差’亦即滑動速度爲零’但是只要後輪3 〇 一鎖定則前 輪2 3和後輪3 0產生回轉速度差而產生滑動速度。 因此控制器1 0 1在前輪23和後輪3 〇之回轉速度差的 滑動速度爲規定値以上時而後輪30爲滑移或鎖定，則判 定也必須對前輪2 3制動，而因開啓制動增壓閥8 9，使蓄 -10- 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) ，裝--------訂---------線. 經濟部智慧財產局員工消費合作社印製 483843 經濟部智慧財產局員工消費合作社印制衣 A7 B7 五、發明說明（9 ) 壓於蓄壓器82的作動油被送至鼓式制動器的輪缸，然後 制動靴擴張使襯裡和輪鼓接觸而對前輪23產生制動作 用。如此藉由也對前輪2 3進行制動，可給予對車輛充份 之制動力。因爲如此，在叉架2 5上搭載有載重狀態也可 得充份的制動力，可縮短制動距離安全的加以制動。而 且在搭載有載重及未搭載有載重之間，不但可縮小制動 距離之差，同時可給予駕駿人沒什麼改變的制動感覺。 另外，伴隨著制動即使前輪荷重會增加而後輪荷重減 少，在本實施形態而言’因爲藉由對前輪2 3施加之制動 而可得充份之制動力，所以不會如習知一般需要增大制 動距離。而且如習知將後輪置於由車輛寬度方向之中心 往左側偏離位置的話，在突然地制動時，車輛會有往左 側旋轉而停止之虞。在本實施形態而言，藉由對一對前 輪2 3同時進行制動，降低了後輪3 0因從車輛寬度方向 之中心偏離而引起之力矩的影響，即使後輪3 〇偏離，也 可使車輛大約停止於直線方向上。 輪缸內的壓力値係由壓力檢測器9 3測量，當達到規定 値時，控制器1 0 1開啓制動增壓閥8 9，以維持輪缸內的 壓力而維持前輪制動作用。 接著，藉由制動使車輛停止時，亦即前輪2 3的回轉速 度爲零，前輪23爲停止時，或前輪23爲接近停止的低 速時，或加速桿42爲中立位置或被搖動往與車輛行進方 向相同方向時’則控制器1 〇 1判斷解除前輪制動的要求， 而解除前輪制動裝置1 1 1。亦即控制器！ 〇丨在開啓制動減 -1 1 - 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) ，装--------訂---------線* 483843 A7 B7 五、發明說明（…） 壓閥時，同時維持制動增壓閥8 9的開閉，使輪缸內的作 動油回到油槽43。藉此，在前輪不需制動的場合時，前 輪23作爲從動輪可回轉，而在前輪23或後輪30上連接 所謂的再生機構時也可進行有效率地能源回收。 此外以本實施形態而言，滑動速度爲規定値以上時， 不論有無搭載載重，都可對前輪2 3制動。因此，於叉架 2 5上未搭載載重之平常的行進中，易滑路面，即使是如 溼路面或凍結的路面，也可縮短制動距離安全地制動。 另外，測量輪輪之回轉速度的裝置並不限定於上述實 施形態所示之前輪回轉數檢測器1 20，有關其測量形態或 設置位置可作適當的改變。且測量後輪之回轉速度的裝 置亦相同，在上述的實施形態雖裝設於驅動馬達53，但 亦可裝設於後輪3 0上。再者，檢測車輛行進方向的回轉 方向檢測器5 5 b取代檢測如第1實施形態之驅動馬達5 3 的回轉方向之形態，有時改以直接檢測後輪3 0本身之回 轉方向，有時檢測前輪2 3的回轉方向，或藉由其它的方 法檢測車輛的行進方向也可以。 第2實施形態 以下有關本發明之第2實施形態之伸出式叉架升降機 以第9圖加以說明。在此伸出式叉架升降機中，取代在 第1實施形態的鼓式制動器，設置由電磁制動器所成之 前輪制動裝置1 3 1，在經由軸承1 3 3、1 3 4而安裝於軸部 1 3 2的輪1 3 5上，以螺栓固定以朝軸向可滑動之鍵槽加工 之電磁制動器的制動碟片1 3 6，在伸出腳2 2上以螺栓固 -1 2- 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 訂---------線一 經濟部智慧財產局員工消費合作社印製 A7 __B7 五、發明說明（“） 定電磁制動器的吸著部1 3 7，藉由控制器1 0 1而來的信號 依吸著部1 3 7所產生之磁力使制動碟片1 3 6吸附在吸著 部1 3 7上而得到制動力。依這樣的電磁制動器，並不需 要專用的油壓源，而且即使沒有用載重用之作動油也可 得制動作用。 第3實施形態 有關本發明之第3實施形態的伸出式叉架升降機，以 第1 〇圖加以說明。在此伸出式叉架升降機中，取代在第 1實施形態的油壓式鼓式制動器，改以設置線圈作動之凸 輪式鼓輪制動器所成之前輪制動裝置1 4 1，藉由控制器 1 0 1所來的信號使線圈1 42作動以拉動桿1 43，而隨著桿 1 43的動作使制動凸輪1 44回轉，而伴隨制動凸輪1 44的 接觸面之變化使制動靴1 45擴張，形成與鼓輪接觸而可 得到制動力。加依以此種線圈作動之凸輪式鼓輪制動器 的話，不需要專用的油壓源而且即使沒有使用載重用之 作動油也可得制動作用。 第4實施形態 就有關本發明之第4實施形態的伸出式叉架升降機加 以說明。第Π圖係以槪念的表示伸出式叉架升降機之構 成圖，第1 2圖爲其制動閥總成之詳細圖。而有關本實施 形態之伸出式叉架升降機的機台上如同第1 1圖之槪念表 示，設置有控制器240、載重馬達241、油壓泵242、油 槽2 43、作動油控制閥244、制動總成24 5、蓄壓器246 以及壓力開關2 4 7。且一對前輪2 2 3的各自近傍裝設有鼓 -13- ΐ紙張尺度適用中國國家標準(CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) £ 訂---------線' 經濟部智慧財產局員工消費合作社印製 A7 ^ ___B7_______ 五、發明說明（^) 輪式的前輪制動裝置2 4 8及前輪回轉數檢測器2 4 9 ’另外 在後輪2 3 0的近傍設置有未圖示之後輪制動裝置及後輪 回轉數檢測器2 5 0。而制動閥總成2 4 5則如第1 2圖所示， 具備有減壓閥260、關閉閥261及線性電磁閥262。 其次，有關本實施形態之伸出式叉架升降機的動作加 以說明。首先伸出式叉架升降機在停車時，亦即駕駛座 內未乘坐有駕駛人時，制動踏板2 3 3爲上昇狀態，此狀 態爲安全制動的作動狀態，這樣的制動踏板23 3的資訊 經由制動開關23 3 a送至控制器240，由控制器240辨識 其資訊爲「制動作用命令」而使後輪制動裝置作用對後 輪23 0進行制動。另外，此時控制器240也收到前輪223 停止·，亦即前輪223的回轉數爲零之資訊，藉此解除前 輪制動裝置2 4 8。 然後使伸出式叉架升降機行進時，首先駕駛人一踩制 動踏板23 3則解除「制動作用命令」，而解除作用於後輪 23 0的後輪制動裝置。接著駕駿人將加速桿23 4朝車輛前 方搖動，則其動値係作爲加速桿前進信號送至控制器2 4 0 使車輛開始前進，然後使車輛減速或停止時，將加速桿 23 4朝車輛後方搖動’其動作作爲加速桿後退信號送至控 制益2 4 0。藉此控制:gg： 2 4 0辨識爲加速桿2 3 4被朝車輛行 進方向（前進方向）之反方向（後退方向）搖動，而將 其狀態辨識作爲「制動作用命令」，而對後輪23〇制動。 再者，在後輪2 3 0爲鎖定或滑動時，如同以下，由前 輪制動裝置2 4 8也對前輪制動。如第1 3圖所示，以步驟 -14- 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 裝--------訂---------線 黪. 經濟部智慧財產局員工消費合作社印製 經濟部智慧財產局員工消費合作社印製 Α7 *____Β7____ 五、發明說明（β ) s 1而言，因加速桿2 3 4之制動作用命令輸入至控制器2 4 〇 則控制器240以步驟S2而言，爲了縮短制動油的液壓的 上昇時間’對關閉閥2 6 1及線性電磁閥2 6 2通電。進而 以步驟S 3而言，控制器2 4 0從前輪回轉數檢測器2 4 9及 後輪回轉數檢測器2 5 0所檢測的前輪及後輪回轉數而求 得各自的回轉速度，由這些値算出滑動比。滑動比爲由[前 輪回轉速度-後輪回轉速度]/ [前輪回轉速度（亦即車輛 對地面之相對速度）]而算出。 在此就滑動比及輪胎之傳達力的關係加以說明。在第 1 4圖A所示之狀態爲前輪及後輪一起高速回轉的狀態。 但是A及B所示之狀態皆關於前輪回轉速度和後輪回轉 速度•之差爲相同値之狀態。亦即即使相同回轉速度差， 在前後輪於低速回轉的B狀態下，可以說接近因前輪制 動而需要輔助的滑動區域狀態，而在前後輪於高速回轉 的A狀態下，可以說還未接近滑動區域狀態。亦即在A 的狀態下，即使前後輪之回轉速度差再增加也還不可得 到後輪的制動力之狀態，以使作爲前輪制動器的時機而 言係有些早。因此在本實施形態，藉由依滑動比而決定 使前輪制動器作用的時機實際上在到達輪胎之傳達力降 低的滑動區域爲止，不對前輪制動，特別是在前後輪於 高速回轉狀態下預防因前輪制動之過剩的制動力所引起 感覺不舒服。 現在回到第1 3圖，以步驟4而言，判斷控制器2 4 0算 出之滑動比是否爲設定値以上’然後’在滑動比爲設定 -1 5- _本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公ΐ~) (請先閱讀背面之注咅？事項再填寫本頁)483843 A7 B7 V. Description of the invention (/) The lifting cylinder moves the fork frame 25 to carry the load. In the state where a load is mounted on the fork 25, as soon as the driver shakes the acceleration lever 4 2 forward, the action is sent to the controller 101 as the acceleration lever forward and backward signal, and the drive motor is driven to start the vehicle forward. , And then the driver swings the acceleration lever 4 2 backward in order to decelerate or stop the vehicle. This is the same as when the brake is not mounted on the fork 25, and its action is recognized by the controller 1 0 1 For "brake action command", the rear wheel 30 is braked. In addition, when a load is mounted on the fork 25, the weight of the vehicle and the inertial force are increased due to its component, so that the braking force needs to be greater than that when the load is not mounted. Therefore, when braking the rear wheel 30, the inertia and force of the vehicle are large, but the braking force is insufficient, and the rear wheel 30 may be locked. If the rear wheel 3 0 is locked, the state of the rear wheel revolution number detector 5 5 a will detect that the number of revolutions of the rear wheel 30 is approximately equal to zero, that is, the revolution speed may be determined according to approximately zero. 'Even if the rear wheel 30 is locked, the front wheel 23 of the driven wheel continues to rotate during the period when the vehicle is moving forward, and the rotation speed is detected by detecting the number of front wheel rotation based on the number of front wheel rotation 1 2 0. Here, in the state that the rear wheel 3 G is not locked, the rotation speeds of the front wheel 23 and the rear wheel 3 0 are about the same. Although the rotation speed difference between the front wheel 23 and the rear wheel 3 0 is “the sliding speed is zero”, as long as When the rear wheel 30 is locked, the front wheel 23 and the rear wheel 30 generate a rotational speed difference and a sliding speed. Therefore, when the sliding speed of the difference between the rotation speeds of the front wheel 23 and the rear wheel 30 is greater than or equal to 控制器 and the rear wheel 30 is slipping or locked, it is determined that the front wheel 23 must also be braked. Pressure valve 8 9 so that -10- This paper size applies Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page), install ------ --Order --------- line. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 483843 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (9) Pressure on the accumulator The operating oil of 82 is sent to the wheel cylinder of the drum brake, and then the brake shoe is expanded to bring the lining into contact with the drum, thereby braking the front wheel 23. By braking the front wheels 23 in this way, sufficient braking force can be given to the vehicle. Because of this, sufficient braking force can be obtained even when the fork 25 is loaded with a load, and the braking distance can be shortened to safely brake. In addition, between the loaded and unloaded loads, the difference in braking distance can be reduced, and at the same time, the braking feeling can be given to the driver without any change. In addition, with the braking, even if the front wheel load increases and the rear wheel load decreases, in this embodiment, 'because sufficient braking force can be obtained by applying braking to the front wheels 23, it will not need to increase as it is known. Large braking distance. Also, if it is known to place the rear wheel in a position deviating from the center of the vehicle width direction to the left, the vehicle may rotate to the left and stop when braking suddenly. In this embodiment, by simultaneously braking a pair of front wheels 23, the influence of the torque caused by the rear wheel 30 deviating from the center of the vehicle width direction is reduced, and even if the rear wheel 30 deviates, it can also make The vehicle stopped approximately in a straight direction. The pressure in the wheel cylinder is measured by the pressure detector 93. When the specified pressure is reached, the controller 101 opens the brake booster valve 89 to maintain the pressure in the wheel cylinder and maintain the front wheel braking effect. Then, when the vehicle is stopped by braking, that is, when the rotation speed of the front wheels 23 is zero, when the front wheels 23 are stopped, or when the front wheels 23 are at a low speed near stopping, or the acceleration lever 42 is in a neutral position or shaken toward the vehicle When the traveling direction is the same, the controller 1 judges the request to release the front wheel brake, and releases the front wheel brake device 1 1 1. That's the controller! 〇 丨 Brake Reduction -1 1-This paper size applies Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page), install ------ --Order --------- line * 483843 A7 B7 V. Description of the invention (...) When the valve is pressed, the brake booster valve 8 9 is kept open and closed at the same time, so that the working oil in the wheel cylinder returns to the oil tank 43 . Thus, when the front wheels do not need to be braked, the front wheels 23 can be rotated as driven wheels, and efficient energy recovery can also be performed when a so-called regeneration mechanism is connected to the front wheels 23 or the rear wheels 30. In addition, in this embodiment, when the sliding speed is equal to or higher than the predetermined speed, the front wheels 23 can be braked regardless of the presence or absence of a load. Therefore, during normal travel without a load on the fork 25, slippery roads can be safely braked by shortening the braking distance even on wet or frozen roads. In addition, the device for measuring the rotation speed of the wheel is not limited to the front wheel rotation number detector 120 shown in the above embodiment, and the measurement mode or the installation position can be appropriately changed. The device for measuring the rotation speed of the rear wheel is also the same. Although the drive motor 53 is installed in the above embodiment, it can also be installed on the rear wheel 30. In addition, instead of detecting the turning direction of the driving motor 5 3 as in the first embodiment, a turning direction detector 5 5 b that detects the traveling direction of the vehicle may be used to directly detect the turning direction of the rear wheel 30 itself. It is also possible to detect the direction of rotation of the front wheels 23 or the direction of travel of the vehicle by other methods. (Second Embodiment) An extension type forklift elevator according to a second embodiment of the present invention will be described below with reference to Fig. 9. In this extended forklift, instead of the drum brake of the first embodiment, a front wheel brake device 1 3 1 made of an electromagnetic brake is provided, and it is mounted on a shaft portion via bearings 1 3 3, 1 3 4 1 3 2 wheels 1 3 5 are bolted to the brake discs of the electromagnetic brake with the key groove processed in the axial direction 1 3 6 and bolts are fixed to the protruding feet 2 2-1-this paper size Applicable to China National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling out this page) Order --------- Xinyi Line Intellectual Property Bureau Employee Consumption Cooperative Print System A7 __B7 V. Description of the invention (") The absorbing part 1 3 7 of the fixed electromagnetic brake uses the signal from the controller 1 0 1 to make the brake disc 1 3 6 according to the magnetic force generated by the absorbing part 1 3 7. The braking force is obtained by being adsorbed on the suction portion 1 3 7. According to such an electromagnetic brake, a dedicated oil pressure source is not required, and the braking effect can be obtained even if no hydraulic oil is used for the load. The third embodiment relates to the present invention. The third embodiment of the invention is described with reference to Fig. 10. In the extended forklift, instead of the hydraulic drum brake of the first embodiment, the front wheel brake device 1 4 1 is formed by a cam drum brake which is operated by a coil, and the controller 1 0 1 The received signal causes the coil 14 to actuate to pull the lever 1 43, and the brake cam 1 44 rotates with the action of the lever 1 43. With the change of the contact surface of the brake cam 1 44, the brake shoe 1 45 expands, forming a contact with The braking force can be obtained by contacting the drum. If a cam-type drum brake actuated by such a coil is used, a dedicated oil pressure source is not required, and the braking effect can be obtained even if no driving oil for the load is used. The fourth embodiment of the present invention will be described with respect to the extended fork lift. Figure Π is a diagram showing the structure of the extended fork lift, and Figure 12 is the details of the brake valve assembly. As shown in Fig. 11 on the machine table of the extended fork lift of this embodiment, a controller 240, a load motor 241, a hydraulic pump 242, an oil tank 2 43 and an operating oil control are provided. Valve 244, brake assembly 2 4 5. Pressure accumulator 246 and pressure switch 2 4 7. And each pair of front wheels 2 2 3 are equipped with drums 13- ΐ Paper size applies Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page) £ Order --------- Line 'Printed by A7 of the Intellectual Property Bureau Employee Consumer Cooperative of the Ministry of Economic Affairs ^ ___B7_______ 5. Description of Invention (^) Wheeled Front Wheel The brake device 2 4 8 and the front wheel rotation number detector 2 4 9 ′ are provided with a rear wheel brake device and a rear wheel rotation number detector 2 50 (not shown) near the rear wheels 2 3 0. The brake valve assembly 2 4 5 includes a pressure reducing valve 260, a shut-off valve 261, and a linear solenoid valve 262 as shown in FIG. 12. Next, the operation of the extended fork lift of this embodiment will be described. First, when the extended fork lift is stopped, that is, when no driver is seated in the driver's seat, the brake pedal 2 3 3 is in an up state, and this state is a state of safe braking. The information of such a brake pedal 23 3 passes The brake switch 23 3 a is sent to the controller 240, and the controller 240 recognizes that the information is a “brake action command” and causes the rear wheel braking device to act to brake the rear wheel 23 0. In addition, at this time, the controller 240 also receives the information that the front wheel 223 is stopped, that is, the number of revolutions of the front wheel 223 is zero, thereby releasing the front wheel braking device 2 4 8. When the extended forklift travels, the driver first depresses the brake pedal 23 3 to release the “brake action command” and releases the rear wheel brake device acting on the rear wheel 230. Then the driver shakes the acceleration lever 23 4 toward the front of the vehicle, and then sends the acceleration lever forward signal to the controller 2 4 0 to start the vehicle, and then decelerates or stops the vehicle. The vehicle's rearward rocking motion is sent to the control benefit 240 as an acceleration lever back signal. Take this control: gg: 2 4 0 is recognized as the acceleration lever 2 3 4 is shaken in the opposite direction (reverse direction) of the vehicle's traveling direction (forward direction), and its state is recognized as a "brake action command", and the rear wheel is 23〇 Brake. When the rear wheel 230 is locked or sliding, the front wheel brake device 2 4 8 also brakes the front wheel as described below. As shown in Figure 13 below, with step -14- this paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page). ---- Order --------- Line 黪. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 * ____ Β7 ____ 5. Description of the Invention (β) s 1 In other words, because the brake action command of the accelerator lever 2 3 4 is input to the controller 2 4, the controller 240 uses step S2 to shorten the rise time of the hydraulic pressure of the brake fluid to the shut-off valve 2 6 1 and the linear solenoid valve 2 6 2 Power on. Furthermore, in step S3, the controller 2 40 obtains the respective rotation speeds from the number of front wheel and rear wheel rotation detected by the front wheel rotation number detector 2 4 9 and the rear wheel rotation number detector 2 50, and from These frames calculate the slip ratio. The slip ratio is calculated from [front wheel rotation speed-rear wheel rotation speed] / [front wheel rotation speed (that is, the relative speed of the vehicle to the ground)]. The relationship between the slip ratio and the transmission force of the tire will be described here. The state shown in FIG. 14A is a state where the front wheels and the rear wheels rotate at high speed together. However, the states shown in A and B are the same as for the difference between the front wheel rotation speed and the rear wheel rotation speed. That is, even with the same turning speed difference, in the B state where the front and rear wheels are rotating at low speed, it can be said that it is close to the state of the sliding area that needs assistance due to front wheel braking, and in the A state where the front and rear wheels are rotating at high speed, it can be said that it is not close Status of the sliding area. That is, in the state of A, even if the rotation speed difference between the front and rear wheels increases, the braking force of the rear wheels cannot be obtained, so that the timing of the front wheel brake is a little early. Therefore, in this embodiment, the timing of applying the front wheel brakes is determined according to the slip ratio. Actually, the front wheels are not braked until they reach the sliding area where the transmission force of the tires is reduced, especially when the front and rear wheels are rotating at a high speed. Excessive braking force causes discomfort. Now return to FIG. 13. According to step 4, determine whether the sliding ratio calculated by the controller 2 40 is equal to or higher than the setting 然后 and then set the sliding ratio to -1 5- _ This paper size applies Chinese national standards ( CNS) A4 size (210 X 297 cm ~) (Please read the note on the back? Matters before filling out this page)

經濟部智慧財產局員工消費合作社印製 483843 A7 _____Β7 ____ 五、發明說明（Μ) 値以上時，以步驟5而言係依第1 5圖所示的制動液壓 圖，取得目標的設定液壓値，在步驟S 6使前輪產生制動。 在第1 1及1 2圖中，控制器240對關閉閥26 1及線性 電磁閥262通電，而使關閉閥26 1開啓，同時調整線性 電磁閥262的開啓量以產生選擇之液壓。藉此儲存在蓄 壓器246的油以所希望的選擇液壓作用在前輪制動裝置 248而使一對前輪223被制動。而且前輪制動裝置24 8之 油壓的洩放只有在操作線性電磁閥262使前輪制動裝置 24 8和油槽243連通時進行，因此形成對前輪制動裝置 24 8之油壓供給及洩放，實際上只要線性電磁閥就可進 行。 此外，有關對蓄壓器2 4 6之油的蓄壓係如以下來進行。 在實施載重作業之際，載動馬達241起動，油壓泵242 被驅動。藉此，油槽243內的油供給予爲產生載動作業 之液壓的作動油控制閥244，同時經由減壓閥260也供給 至蓄壓器246內。然後減壓閥260之引導壓一達到一定 値以上則減壓閥260開啓，依關閉閥261及止逆閥260a 的作用使蓄壓器246內之液壓被維持一定。且未實施載 重作業時，形成被壓力開關247監視的蓄壓器內之液壓 降低不滿一定値則由控制器2 4 0驅動油壓泵2 4 2以實施 蓄壓器246內之蓄壓。 前輪一被制動則控制器4 0在第1 3圖之步驟S 7判斷車 輛是否停止。在車輛未停止時，進一步以步驟S 8判斷可 否解除制動信號，亦即滑動比未滿規定値的話，判斷前 -16- 紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁)Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 483843 A7 _____ Β7 ____ 5. When the description of the invention (M) 値 is above, the step 5 is based on the brake hydraulic pressure chart shown in Figure 15 to obtain the target hydraulic pressure 値The front wheels are braked at step S6. In Figs. 11 and 12, the controller 240 energizes the shut-off valve 26 1 and the linear solenoid valve 262 to open the shut-off valve 26 1 and adjusts the opening amount of the linear solenoid valve 262 to generate a selected hydraulic pressure. As a result, the oil stored in the accumulator 246 acts on the front wheel braking device 248 at a desired selected hydraulic pressure, thereby braking the pair of front wheels 223. In addition, the hydraulic pressure release of the front wheel brake device 24 8 can only be performed when the linear solenoid valve 262 is operated to communicate the front wheel brake device 24 8 and the oil groove 243. Therefore, the oil pressure supply and release to the front wheel brake device 24 8 is formed. All that is required is a linear solenoid valve. The pressure accumulation of the oil in the pressure accumulator 2 4 6 is performed as follows. When carrying out a load operation, the load motor 241 is started, and the hydraulic pump 242 is driven. Thereby, the oil in the oil tank 243 is supplied to the working oil control valve 244 which is a hydraulic pressure for generating a load operation, and is also supplied to the accumulator 246 through the pressure reducing valve 260. Then, as soon as the pilot pressure of the pressure reducing valve 260 reaches a certain level, the pressure reducing valve 260 is opened, and the hydraulic pressure in the pressure accumulator 246 is maintained constant according to the functions of the closing valve 261 and the check valve 260a. When the load operation is not performed, the hydraulic pressure in the accumulator monitored by the pressure switch 247 is reduced to a certain level. Then, the controller 2 40 drives the hydraulic pump 2 4 2 to implement the pressure accumulation in the accumulator 246. As soon as the front wheels are braked, the controller 40 determines whether the vehicle is stopped at step S7 in FIG. 13. When the vehicle is not stopped, it is further judged in step S 8 whether the brake signal can be released, that is, if the slip ratio is less than the stipulated value, before judging the -16- paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the notes on the back before filling this page)

A7 —_B7___ 五、發明說明（β ) 輪愈需要制動就不產生後輪之鎖定。而控制器240在上 述步驟S 7中判斷車輛爲停止時，或在步驟S 8中判斷也 可解除制動信號時’在步驟S 9解除gij輪制動。 其他的實施形態 此外，本發明非限定於上述的實施形態，可實施如以 下之各種改變。 亦即，在上述實施形態中，前輪制動作用形成不只依 加速桿42、234的制動作用命令，也依制動踏板33、233 的制動作用命令而執行之構成也可以。亦即，例如行進 中因某些因素駕駛人採取不正確駕駛姿勢或者從駕駛座 27落下而一將腳離開制動踏板33、2 3 3則制動踏板33、 2 3 3 土昇形成安全制動裝置的作動狀態，而控制器40、 240將其資訊作爲辨識爲安全制動之依制動踏板33、233 的「制動作用命令」，即使沒有依加速桿4 2、2 3 4的「制 動作用命令」也會使前輪制動裝置作用而對前輪2 3、2 2 3 進行制動。 另外以本發明之HU輪制動裝置而言，也可適當使用上 述以外之以油壓作動之凸輪式鼓輪制動器或碟式制動器 或其他形式之制動器。 又，以搖動式加速桿4 2、2 3 4作爲表示本發明的加速 裝置，並不限定如此’例如爲回轉式或滑動式的裝置也 可以。 另外，以制動踏板3 3、2 3 3作爲表示本發明之安全制 動裝置，並不限定如此，例如也可爲按鈕式。 -1 7- 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) --------訂--------線· 經濟部智慧財產局員工消費合作社印製 A7 —^—__B7______ 五、發明說明（4 ) 再者’雖將載重用之現有的油壓泵等兼用於前輪制動 的作動，但本發明不限定如此，也可具備前輪制動專用 之油壓零件。 [發明的效果] 如以上之說明’依申請專利範圍第1及2項所記載之 本發明的伸出式叉架升降機，藉由也對前輪進行制動， 即使後輪產生鎖定時，也可給予車輛充份之制動力，藉 此形成在叉架上搭載有載重之狀態也可得充份制動力， 可縮短制動距離而加以安全地制動，而在搭載有載重及 未搭載有載重之間，可縮短制動距離的差，同時給予駕 駛人並沒什麼變化的制動感覺。而且對後輪之相對的前 輪之制動力的比例較以往增加，伴隨其增加而減少因後 輪位於自車輛寬度方向之中心偏離位置所產生之力矩， 可抑制在制動時車輛的旋轉。 另外，依申請專利範圍第3項所記載之伸出式叉架升 降機，在行進中因某種因素使駕駛人採取不正確之駕駛 姿勢或從駕駛座落下而一將腳離開制動踏板則即使沒有 依加速裝置的制動作用命令，也會對前輪及後輪進行制 (請先閱讀背面之注意事項再填寫本頁) 訂---------線一 經濟部智慧財產局員工消費合作社印制衣 降決 降動 升可 升制 架， 架輪 叉測 叉前 式檢 式因 出動 出防 伸滑 伸予 之行 之可 載進 載也 記地 記態 所易 所狀 項容 項的 4 可 5 轉 。 第就 第回 升圍器。圍速 提範測機範高 更利檢時利爲 性專數的專輪 全請轉動請後 安申回制申前 以依以輪依使 所，只前，即 , 且，對又， 動機定 機 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 483843 A7 _____B7___ 五、發明說明（7 ) 之過剩的制動力而引起不舒服的制動感覺。 而且，依申請專利範圍第6項所記載之伸出式叉架升 降機，因只有在必要的時候前輪制動才動作，所以可防 止不必要的制動所伴隨來之能源損失，同時將所謂的再 生機構連接至前輪或後輪時可進行有效率地能源的回 收。 再者’依申請專利範圍第7項所記載之伸出式叉架升 降機’藉由將現有之油壓泵兼用在前輪制動裝置之作動 上，形成可謀求零件件數的減少和成本降低。 而且’依申請專利範圍第8項所記載之伸出式叉架升 降機’藉由對一對前輪同時制動，即使後輪係位於自車 輛寬度方向偏離之位置，也可使車輛停止在大約直線上。 [圖面之簡單說明] 第1圖有關本發明之第1實施形態之伸出式叉架升降 機的斜視圖。 第2圖自前方看儀控板時之斜視圖。 第3圖自後方看功能品室內部時之斜視圖。 第4圖表示驅動馬達及制動踏板之連接構造的側視圖。 第5圖表示控制閥和載重馬達之連接狀態圖。 第6圖表示前輪制動之油壓回路圖。 第7圖有關本發明之第1實施形態之伸出式叉架升降 機的上視圖。 第8圖表示有關本發明之第1實施形態之伸出式叉架 升降機的前輪及前輪制動裝置之構造的前視圖。 -19- 本紙張尺度適用中國國家標準（CNS)A4規格（210 x 297公釐） (請先閱讀背面之注意事項再填寫本頁) -------訂---------線. 經濟部智慧財產局員工消費合作社印製 483843 A7 B7 五、發明說明（1) 第9圖表示有關本發明之第2實施形態之伸出式叉架 升降機的前輪及前輪制動裝置之構造的前視圖。 第1 〇圖表示有關本發明之第3實施形態之伸出式叉架 升降機的前輪及前輪制動裝置之構造的側視圖。 第1 1圖以槪念表示有關本發明之第4實施形態之伸出 式叉架升降機的構成圖。 第1 2圖表示在有關本發明之第4實施形態之伸出式叉 架升降機的制動閥總成的構成圖。 第1 3圖說明有關本發明之第4實施形態之伸出式叉架 升降機的前輪制動器之作動流程圖。 第1 4圖表示滑動比和輪胎傳達力之關係圖。 第*1 5圖表示運用在有關本發明之第4實施形態之伸出 式叉架升降機的前輪制動液壓圖。 第1 6圖以往的伸出式叉架升降機之側視圖。 第1 7圖以槪念表示以往的伸出式叉架升降機的上視 圖。 [符號說明] 21…伸出式叉架升降機 2 2…伸出腳 23,223…前輪 2 4…桅桿裝置 2 5,2 2 5…叉架 27…駕駛座 29…機台 -20- 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製A7 —_B7 ___ 5. Description of the Invention (β) The more the wheels need to be braked, the rear wheels will not be locked. When the controller 240 determines in step S7 that the vehicle is stopped, or when it is determined in step S8 that the brake signal can also be released ', the gij wheel brake is released in step S9. Other Embodiments The present invention is not limited to the above-mentioned embodiments, and various modifications can be made as follows. That is, in the above embodiment, the front wheel braking action may be formed not only in accordance with the braking action commands of the acceleration levers 42, 234, but also in accordance with the braking action commands of the brake pedals 33, 233. That is, for example, when the driver takes an incorrect driving posture or falls from the driver's seat 27 while traveling, as soon as his foot leaves the brake pedal 33, 2 3 3, the brake pedal 33, 2 3 3 soil rises to form a safety braking device. The operating state, and the controllers 40 and 240 use their information as the "brake action command" according to the brake pedals 33 and 233 for safe braking, even if they do not follow the "brake action command" according to the accelerator lever 4 2, 2 3 4 The front wheel braking device is applied to brake the front wheels 2 3, 2 2 3. In addition, as for the HU wheel braking device of the present invention, a cam-type drum brake or a disc brake or other types of brakes that are operated by hydraulic pressure other than the above may be suitably used. Moreover, the swing-type acceleration levers 4, 2, and 3 4 are used as the acceleration means of the present invention, and the invention is not limited to this. For example, it may be a rotary type or a sliding type. In addition, the brake pedals 3 3, 2 3 3 are used as the safety brake device of the present invention, but the invention is not limited to this. For example, it may be a push button type. -1 7- This paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) -------- Order ----- --- Line · Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 — ^ —__ B7______ V. Description of Invention (4) Furthermore, 'Although existing hydraulic pumps used for load-bearing are also used for front wheel braking, but this The invention is not limited to this, and may also be provided with hydraulic parts dedicated to front wheel braking. [Effects of the invention] As explained above, according to the extended fork lifts of the present invention described in the first and second patent application scopes, the front wheels are also braked, and even when the rear wheels are locked, they can be given. The sufficient braking force of the vehicle can be obtained in the state of carrying a load on the fork frame. The braking force can be shortened and the braking distance can be shortened to safely brake. Between the loaded and unloaded loads, It can shorten the difference in braking distance, and at the same time give the driver the same braking feeling. In addition, the ratio of the braking force of the front wheels relative to the rear wheels has increased compared with the past, and with the increase, the torque generated by the rear wheels being deviated from the center of the vehicle width direction is reduced, and the rotation of the vehicle during braking can be suppressed. In addition, according to the extended fork lift described in item 3 of the scope of patent application, due to some factors during the travel, the driver took an incorrect driving posture or dropped from the driver's seat. According to the braking action command of the acceleration device, the front and rear wheels will also be controlled (please read the precautions on the back before filling out this page). Order --------- Line 1 Ministry of Economic Affairs Intellectual Property Bureau Staff Consumer Cooperatives Printed clothing can be lifted and lifted. The rack wheel fork and fork can be lifted to the front. The load can be loaded and the load can also be recorded. 4 5 turns. The first time the riser. The speed-up tester Fan Gao Gain is more interested in checking the special round. Please turn it back and apply before the application to reliance on the wheel. Only before, that is, and, right, motivation. The paper size of the fixed machine applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 483843 A7 _____B7___ V. Description of the invention (7) Excessive braking force causes uncomfortable braking feeling. Furthermore, according to the extended fork lift described in item 6 of the scope of patent application, the front wheel brakes only operate when necessary, so it can prevent the energy loss caused by unnecessary braking, and at the same time the so-called regeneration mechanism Efficient energy recovery when connected to the front or rear wheels. Furthermore, according to the "extended forklift lifting machine described in item 7 of the scope of patent application", the existing hydraulic pump is also used for the operation of the front wheel braking device, thereby reducing the number of parts and the cost. In addition, according to the "extended forklift lift described in item 8 of the scope of patent application", by simultaneously braking a pair of front wheels, even if the rear wheel train is located at a position deviating from the vehicle width direction, the vehicle can be stopped on an approximately straight line. . [Brief Description of the Drawings] Fig. 1 is a perspective view of a protruding forklift according to a first embodiment of the present invention. Figure 2 is an oblique view when the instrument panel is viewed from the front. Fig. 3 is a perspective view of the interior of the functional product room as viewed from the rear. Fig. 4 is a side view showing a connection structure of a drive motor and a brake pedal. Fig. 5 is a diagram showing a connection state between a control valve and a load motor. Figure 6 shows the hydraulic circuit diagram of front wheel braking. Fig. 7 is a top view of the extended forklift according to the first embodiment of the present invention. Fig. 8 is a front view showing the structure of the front wheels and the front wheel braking device of the extended fork lift of the first embodiment of the present invention. -19- This paper size applies to China National Standard (CNS) A4 (210 x 297 mm) (Please read the precautions on the back before filling this page) ------- Order ------- --Line. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 483843 A7 B7 V. Description of the invention (1) Figure 9 shows the front wheel and front wheel brake device of the extended fork lift of the second embodiment of the present invention. Constructed front view. Fig. 10 is a side view showing the structure of a front wheel and a front wheel brake device of a protruding fork lift according to a third embodiment of the present invention. Fig. 11 is a block diagram showing the configuration of an extended forklift according to a fourth embodiment of the present invention. Fig. 12 is a diagram showing the configuration of a brake valve assembly of an extended fork lift according to a fourth embodiment of the present invention. Fig. 13 is a flowchart showing the operation of the front wheel brake of the extended fork lift of the fourth embodiment of the present invention. Figure 14 shows the relationship between the slip ratio and the tire transmission force. Fig. 15 shows a hydraulic pressure diagram of the front wheel brakes used in the extended forklift according to the fourth embodiment of the present invention. Fig. 16 is a side view of a conventional extended fork lift. Fig. 17 is a top view of a conventional outrigger forklift shown in Fig. 17. [Explanation of symbols] 21 ... Extended fork lift 2 2 ... Extended feet 23,223 ... Front wheel 2 4 ... Mast device 2 5,2 2 5 ... Fork 27 ... Drive seat 29 ... Machine-20- This paper size applies China National Standard (CNS) A4 Specification (210 X 297 mm) (Please read the notes on the back before filling this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs

483843 A7 B7 五、發明說明（θ ) 3 0,23 0···後輪 3 3,2 3 3…制動踏板 42,23 4·.·力口速桿 43,243…油壓泵 54…後輪制動裝置 55a,2 5 0…後輪回轉數檢測器 82,246···蓄壓器 1 1 1,248··· 1 20,249··· 器 測 置檢 裝數 ¢/轉 93 / rfffT 制回 輪.輪 心01Μ目 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 2 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐）483843 A7 B7 V. Description of the invention (θ) 3 0,23 0 ··· Rear wheel 3 3,2 3 3 ... Brake pedal 42,23 4 ·· Power mouth lever 43,243 ... Hydraulic pump 54 ... Rear wheel brake Device 55a, 2 5 0 ... Rear wheel rotation number detector 82,246 ... Pressure accumulator 1 1 1,248 ... 1 20,249 ... (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 2 The paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm)

Claims (1)

483843 - 六、申請專利範圍 M ^ ' 第8 9 1 1 4 3 2 5號「伸出式叉架升降機」專利案 (91年2月25日修正） Λ申請專利範圍： 1 . 一種伸出式叉架升降機，其特徵爲具備有：位於車輪 後部，裝設有後輪的機台；形成於該機台內的駕駛 座；左右一對的伸出腳，其具有左右一對的前輪；沿 著該伸出腳可滑動的桅桿裝置；被該桅桿裝置所支撐 之左右一對的叉架；與制動作用命令運動而對制動該 後輪的後輪制動裝置；用於檢測該後輪的滑動檢測裝 置；和前輪制動裝置，在有制動命令時，依該滑動檢 測裝置檢測出該後輪產生滑動之場合時，進行對該前 輪的制動。 2 .如申請專利範圍第1項之伸出式叉架升降機，其中該 制動命令，係於安全制動裝置在作動狀態時，或者該 安全制動裝置在非作動狀態且加速裝置被移動至與車 輛行進之相反方向時而被發出。 3 .如申請專利範圍第2項之伸出式叉架升降機，其中該 安全制動裝置，係裝設於該駕駛座的制動踏板，於踏 住該制動踏板時，該安全制動裝置爲非作動狀態，而 未踏住該制動踏板時，該安全制動裝置爲作動狀態。 4.如申請專利範圍第1〜3項中任一項之伸出式叉架升降 機，其中該後輪之產生滑動係依據滑動速度來判斷。 5 .如申請專利範圍第1〜3項中任一項之伸出式叉架升降 483843483843-VI. Patent Application Range M ^ 'Patent No. 8 9 1 1 4 3 2 5 "Extended Fork Lift" Patent Case (Amended on February 25, 91) Λ Application for Patent Range: 1. An extension type A forklift lift is characterized in that it includes a machine located at the rear of the wheel and equipped with a rear wheel; a driver's seat formed in the machine; a pair of left and right protruding feet having a pair of left and right front wheels; A mast device that can slide against the extended foot; a pair of left and right forks supported by the mast device; a rear wheel braking device that brakes the rear wheel by commanding movement with a braking action; used to detect the rear wheel slip A detection device; and a front wheel braking device, which brakes the front wheel when a slip command is detected according to the slip detection device when the rear wheel slips. 2. The extended fork lift of item 1 in the scope of patent application, wherein the braking command is when the safety braking device is in an activated state, or the safety braking device is in an inactive state and the acceleration device is moved to travel with the vehicle The opposite direction is sometimes issued. 3. For example, the extended fork lift of the scope of patent application, wherein the safety brake device is a brake pedal installed on the driver's seat, and the safety brake device is in an inactive state when the brake pedal is stepped on. When the brake pedal is not depressed, the safety braking device is in an activated state. 4. The outrigger forklift according to any one of claims 1 to 3, wherein the sliding of the rear wheel is determined based on the sliding speed. 5. The extension fork lift as in any one of the scope of patent application 483843 六、申請專利範圍 機，其中後輪之產生滑動係依據滑動比來判斷。 6 .如申請專利範圍第1〜3項中任一項之伸出式叉架升降 ' 機，其中該前輪制動裝置，於該前輪停止時；該前輪 接近快停止的低速時；該加速裝置被歸位至中立位置 時，該加速裝置被移動至與車輛行進之相同方向時； 該安全制動裝置爲非作動狀態時之任一場合時解除該 前輪的制動。 7·如申請專利範圍第丨〜3項中任一項之伸出式叉架升降 機，其中具備有：以油壓驅動叉架的油壓泵；貯存從 該油壓泵來的作動油而供給該前輪制動裝置之蓄壓 器。 8 .如申請專利範圍第1〜3項中任一項之伸出式叉架升降 機，其中該後輪作爲驅動輪之功能來使用且設置在車 輛寬度方向之偏離中心的位置，而該前輪制動裝置係 同時地進行該左右一對的前輪之制動動作。6. Scope of patent application Machine, in which the sliding of the rear wheel is judged based on the sliding ratio. 6. The extended forklift lifting machine according to any one of claims 1 to 3, wherein the front wheel braking device is when the front wheel is stopped; when the front wheel is close to a low speed where the stop is fast; the acceleration device is When returning to the neutral position, the acceleration device is moved to the same direction as the vehicle is traveling; when the safety brake device is in the non-actuated state, the front wheel brake is released. 7. The outrigger fork lift according to any one of the scope of the application for patents 丨 to 3, which includes: a hydraulic pump that drives the fork rack with oil pressure; stores and supplies the hydraulic oil from the hydraulic pump Pressure accumulator of the front wheel braking device. 8. The outrigger forklift according to any one of claims 1 to 3, wherein the rear wheel is used as a driving wheel and is set at an off-center position in the vehicle width direction, and the front wheel is braked The device performs the braking action of the left and right front wheels simultaneously.