JP2019095016A - Running control device for cargo vehicle and cargo vehicle - Google Patents

Abstract

To enable a smooth shifting operation to be carried out between a second-speed starting automatic shift mode and another drive mode.SOLUTION: There are provided a drive mode selection switch 12 capable of selecting 1 speed - 2 speed and 3 speed automatic shift modes, 1 speed fixed mode; and a 2 speed running mode switch 13 capable of selecting the 2 speed running automatic shift mode that is automatically shifted between the second speed and the third speed. There is provided a running control part 11 that is shifted to the second speed running automatic shift mode by operating the second speed running mode switch 13 once during drive under a selection drive mode selected by the drive mode selection switch 12 and returned back to the drive mode selected by the drive mode selection switch 12 by operating the second speed running mode switch 13 twice.SELECTED DRAWING: Figure 1

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a travel control device of a cargo handling vehicle suitable for transporting a long heavy load and handling work on a slippery road surface, and a cargo handling vehicle equipped with the travel control device.

  For example, in the case of a large forklift, the traveling device is equipped with a three-speed gear for high-speed travel in order to speed up loading of a large load such as a container. In addition to drive modes such as the power mode (1-st gear-2nd-3rd automatic shift mode), the 1st gear fixing mode, the 2nd gear fixing mode and the like, as disclosed in Patent Document 1, the traveling control device An economy mode (2-speed start automatic shift mode) capable of 2-speed to 3-speed automatic shift is provided.

Unexamined-Japanese-Patent No. 2000-213636

  In Patent Document 1, when selecting the 1st-2 / 3rd automatic transmission mode, first, the automatic mode is selected by the shift hold select switch, and the power mode is selected by the auto transmission select switch. When selecting the 2nd gear start automatic transmission mode, the automatic mode is selected by the shift hold select switch, and the economy mode is selected by the auto mission select switch.

  By the way, for example, when carrying out cargo handling work continuously at a work site where a slippery road surface and a road surface with a large inclination are mixed, it is necessary to frequently change the drive mode. In Patent Document 1, when shifting from the second gear start automatic shift mode to the first gear, second gear and third gear automatic shift mode, first, the automatic mode is selected by the shift hold select switch to cancel the second gear start automatic shift mode. Then, the power mode is selected by the auto mission select switch. When shifting from the 1st speed fixed mode or 2nd speed fixed mode to the 2nd speed automatic shift mode, the automatic mode is first selected by the shift hold select switch and the 1st speed fixed mode or 2nd speed fixed mode Is canceled and then the economy mode is selected by the auto mission select switch.

  Thus, for example, in a cargo handling site where a two step operation with two switches is required between the 2nd to 3rd automatic transmission mode and another drive mode, and it is necessary to frequently change the drive mode, the drive mode The shift was not easy and quick, and there was a problem that cargo handling operations were prone to losses.

  The present invention solves the above problems and provides a cargo handling vehicle travel control device capable of smoothly shifting between a two-speed start automatic transmission mode and another drive mode, and a cargo handling vehicle equipped with the travel control device. The purpose is

  The travel control device for a cargo handling vehicle according to the present invention includes a drive mode selection switch capable of selecting one of a plurality of drive modes including at least a first speed, a second speed and a third speed automatic shift mode, and a second speed third speed automatic. A second speed start mode switch capable of selecting a second speed automatic transmission mode to be shifted and a first operation of the second speed start mode switch during driving in a drive mode selected by the drive mode selection switch And a travel control unit which is shifted to a fast start automatic shift mode and returns to a drive mode selected by the drive mode selection switch by operating the second speed start mode switch a second time. Do.

  According to the above configuration, the 2-speed start mode switch is provided independently of the drive mode selection switch, and one of the 2-speed start mode switches is selected during driving of the selected drive mode selected by the drive mode selection switch by the traveling control unit. The second shift start automatic shift mode is shifted by the second operation, and the selected drive mode is returned by the second shift operation of the second shift mode switch. Therefore, it is possible to select easily and quickly simply by operating the second shift start mode switch. The drive mode can be shifted between the drive mode and the two-speed start automatic shift mode, and the operability is improved.

  Further, in the above configuration, it is preferable that the drive mode selection switch can select a 1-speed fixed mode and a 2-speed fixed mode in addition to the 1st-2 / 3rd automatic shift mode. According to the above configuration, even during driving in the first speed fixing mode or driving in the second speed fixing mode, the first speed fixing mode and the second speed starting automatic transmission mode can be easily and quickly operated only by operating the second speed start mode switch. , Or between the 2nd gear fixed mode and the 2nd gear start automatic shift mode, and the operability is improved.

  Furthermore, in the above configuration, preferably, the drive mode selection switch is an alternate operation type switch, and the two-speed start mode switch is a momentary operation type switch.

  Furthermore, in the above configuration, the drive control unit resets the 2-speed start automatic transmission mode by the selection operation of the drive mode selection switch during the drive in the 2-speed start automatic transmission mode, and the drive mode selection switch Preferably, the drive mode is shifted to the selected drive mode.

  In the above configuration, it is preferable that, in the traveling control unit, the 2-speed start automatic shift mode be reset by an operation of a power switch of the cargo handling vehicle.

  A cargo handling vehicle according to the present invention includes the travel control device having any one of the above-described configurations.

  According to the invention of claim 1, it is possible to shift smoothly between the 2-speed start automatic shift mode and the other drive mode, and frequently change the drive mode, such as carrying a long heavy load or a slippery road surface. Can provide a travel control device of the cargo handling vehicle and the cargo handling vehicle that are suitable for the cargo handling operation that requires the

It is a block diagram showing an embodiment of a run control device of a forklift concerning the present invention. It is a flowchart at the time of 1st-2nd-3rd automatic shift mode selection in drive mode in a traveling control device. It is a flowchart at the time of 1 speed fixed mode selection in drive mode. It is a flowchart at the time of 2 speed fixed mode selection in drive mode. It is a schematic plan view which shows arrangement | positioning around a driver's seat. It is operation | movement explanatory drawing of a drive mode selection switch. It is an explanatory view showing a display panel. It is a graph explaining the shift position of 1st-2nd-3rd automatic shift mode. It is a graph explaining a power mode and an eco mode. It is a control sequence diagram of drive mode.

  Hereinafter, an embodiment of a large engine-type forklift according to the present invention will be described based on the drawings.

  As shown in FIG. 1, as operating devices in the drive mode, 1-speed fixed mode, 2-speed fixed mode and 1-speed-2 speed-3 speed automatic shift mode (hereinafter abbreviated as 1-3 speed automatic shift mode) A selectable drive mode selection switch 12, a 2-speed start mode switch 13 capable of selecting a 2-speed start automatic shift mode capable of 2-speed to 3-speed automatic shift, and PE capable of switching between a power mode and an eco mode A mode switching switch 14 is provided, and operation signals are input to the traveling control unit 11 from the switches 12 to 14, respectively. In addition, as peripheral devices in the drive mode, it has a vehicle speed detector 15, an accelerator opening degree detector 16 that detects an accelerator depression amount (or a depression angle), and an engine rotation number detector 17 that detects the number of rotations of the engine. The detection data is input to the traveling control unit 11 from these peripheral devices.

  As shown in FIG. 3A, the cargo handling control lever group 21 is disposed on the right front side of the driver's seat 20, and the drive mode selection switch 12 and the 2-speed start mode switch 13 are arranged laterally on the rear side of the cargo handling control lever group 21. It is arranged. The drive mode selection switch 12 is an alternate operation type switch, and as shown in FIG. 3B, the 1-3 position automatic transmission mode is selected in the neutral position, and the first position fixed in the forward inclined position with the front part depressed. The mode is selected, and the 2-speed fixed mode is selected in a tilting posture after pushing down the rear. The 2nd gear start mode switch 13 is a momentary operation type switch, and the 2nd gear start automatic shift mode is activated by the first operation (push in), and the drive mode selection switch 12 is operated before the second operation (push in). The selected drive mode is restored. Of course, if the 2nd gear start mode switch 13 is repeatedly operated, the odd number of times shift to the 2nd gear start automatic shift mode, and the even number of times return to the selected drive mode, and the 2nd gear start automatic shift mode and drive mode selection The drive mode can be repeatedly changed between the drive mode selected by the switch 12 and the drive mode.

  FIG. 4 illustrates the shift position in the automatic shift mode, in which the vertical axis shows the driving force of the engine and the horizontal axis shows the vehicle speed, and the driving force in the first, second and third speed gears And the relationship between the speed of the vehicle. In the 1-3-speed automatic shift mode, the intersection point between 1st and 2nd is set to the shift position between 1st and 2nd, and the intersection between 2nd and 3rd is set to the shift between 2nd and 3rd. ing. The shift position between the 2nd and 3rd gears in the 2nd gear start automatic transmission mode is also the same as the 1-3rd automatic transmission mode.

  As shown in FIG. 3C, the PE mode switching switch 14 is incorporated in the display panel 22 in front of the driver's seat 20, and can select the power mode and the eco mode by the on / off operation. FIG. 5 illustrates the power mode and the eco mode, in which the vertical axis represents the number of revolutions of the engine, and the horizontal axis represents the degree of accelerator opening (the amount of depression or the depression angle). The start-up speed of the engine with respect to the accelerator opening in the eco mode is lower than the accelerator opening in the power mode and the engine speed, and the maximum engine speed of the engine is limited to a low level. Then, in the power mode and the eco mode selected by the PE mode changeover switch 14, traveling control by the traveling control unit 11 is performed as described later.

  As shown in FIG. 1, the solenoid of the solenoid valve 23 for the first speed clutch and the solenoid of the solenoid valve 24 for the second / third speed clutch constituting the transmission TM are respectively excited by the operation signal output from the traveling control unit 11 Be done. When the first-speed clutch solenoid valve 23 is excited, the hydraulic pressure adjusted by the charging pump P by the TM control valve 25 is supplied to the first-speed port 1ST of the first-third clutch shaft of the transmission TM. The transmission TM is operated to the first speed. Further, the hydraulic pressure adjusted by the TM control valve 25 is supplied from the solenoid valve 24 for the 2 / 3-speed clutch to the port 2ND of the 2-speed clutch shaft of the transmission TM, and the transmission TM is operated to 2nd speed. When the solenoid of the solenoid valve 24 for the 2 / 3-speed clutch is excited, the hydraulic pressure adjusted by the TM control valve 25 is transferred from the solenoid valve 24 for the 2 / 3-speed clutch to the 1st-3rd clutch shaft of the transmission TM. The 3rd gear port 3ST is supplied, and the transmission TM is operated to 3rd gear.

[Drive mode operation]
Next, the flow of the traveling control unit 11 by the drive mode selection switch 12 and the second speed start mode switch 13 will be described with reference to FIGS. 2A to 2C.

(1-3 speed automatic shift mode)
1. As shown in FIG. 2A, the key switch is turned on (STEP. 1), and the drive mode selection switch 12 selects the 1-3-speed automatic shift mode among the plurality of drive modes (STEP. 2).

  2.1) While driving with the 1-3-speed automatic shift mode (STEP. 3), when the first operation of the 2-speed start mode switch 13 is operated (pressed down) (STEP. 4), the 2-speed start automatic shift mode is set. It is shifted (STEP. 5).

  3.2 Drive in 2nd Speed Automatic Shift Mode When the second of 2nd speed start mode switch 13 is operated (pushed down) (STEP 6), it returns to 1-3 speed automatic shift mode (STEP. 6). 3). At this time, the transmission gear is selected according to the traveling speed of the forklift.

  When the 1st speed fixing mode is selected by the drive mode selection switch 12 during the drive in the 4.2-speed start automatic transmission mode (STEP. 7), the 1st speed fixing mode is shifted as shown in FIG. STEP. 13). At this time, if the traveling speed of the forklift is higher than the traveling speed range in the first speed fixed mode, the speed is automatically decelerated to be in the traveling speed range in the first speed fixed mode, and then shifted to the first speed fixed mode Ru.

  When the drive mode selection switch 12 selects the 2-speed fixed mode (STEP. 8) during driving in the 5.2-speed start automatic shift mode, as shown in FIG. 2C, the 2-speed fixed mode is shifted ((2) STEP.23). At this time, if the traveling speed of the forklift is lower than the traveling speed range in the second speed fixed mode, the speed is automatically increased to be within the traveling speed range in the second speed fixed mode, and then shifted to the second speed fixed mode. Ru.

  During the drive in the 6.2-speed start automatic shift mode, the 1-3 shift automatic shift mode is selected by the drive mode selection switch 12 (STEP. 2) and the shift is made to the 1-3 shift automatic shift mode (STEP. 3).

(1-speed fixed mode)
Also when the 1-speed fixing mode is selected by the drive mode selection switch 12, as shown in FIG. 2B, the same operation as above is performed.

11. Selection of 1-speed fixed mode of drive mode selection switch 12 (STEP. 12),
12. Drive in 1-speed fixed mode (STEP. 13), 1st operation of 2-speed start mode switch 13 (STEP. 14), shift to 2-speed start automatic shift mode (STEP. 15),
13. During the 2nd-speed start automatic shift mode, the 2nd-speed start mode switch 13 is operated for the second time (STEP. 16), and the 1-speed fixed mode is restored (STEP. 13).

  14. Selection of 2-speed fixed mode by the drive mode selection switch 12 (STEP. 17) and shift to 2-speed fixed mode (STEP. 23) (FIG. 2C) while driving in the 2-speed start automatic shift mode.

  15. During 1st 2nd gear start automatic shift mode drive, select 1st 3rd gear automatic shift mode by drive mode selection switch 12 (STEP. 18), shift to 1st 3rd gear automatic shift mode (STEP 3) ( Figure 2A).

  16.2 Selection of 1-speed fixed mode by the drive mode selection switch 12 during drive in the 2nd-speed start automatic shift mode (STEP. 12), shift to 1-speed fixed mode (STEP. 13).

(2-speed fixed mode)
Also when the 2-speed fixing mode is selected by the drive mode selection switch 12, as shown in FIG. 1C, the same operation as above is performed.

21. Select 2-speed fixed mode of drive mode selection switch 12 (STEP. 22), drive in 2-speed fixed mode (STEP. 23),
The first operation of the 2nd gear start mode switch 13 (STEP. 24) and the shift to the 2nd gear automatic start shift mode (STEP. 25) while driving in the 22.2 speed fixed mode.
23. 2nd gear start mode operation of the 2nd gear start mode switch 13 (STEP. 26) and return to 1st gear fixed mode (STEP. 23) while driving in 2nd gear start automatic shift mode.

  24.2 Selection of 1-speed fixed mode by the drive mode selection switch 12 (STEP. 27) and shift to 2-speed fixed mode (STEP. 13) (FIG. 2B) during the drive of the 2nd-speed start automatic shift mode.

  25.2 Start During the automatic shift mode selection, selection of the 1-3 shift automatic shift mode by the drive mode selection switch 12 (STEP. 18), shift to the 1-3 shift automatic shift mode (STEP. 3) ( Figure 2A).

  26.2 Selection of 2nd Speed Fixed Mode by Drive Mode Selection Switch 12 During Drive in Automatic Transmission Mode (STEP. 22), Shift to 2nd Speed Fixed Mode (STEP. 23).

(Key-SW OFF and restart)
Moreover, in these FIG. 2A-FIG. 2C, these flows become END by OFF operation of Key-SW (power supply switch). Furthermore, when the Key-SW is turned on by restart, the 2nd-speed start automatic shift mode is canceled, and the drive mode selected by the drive mode selection switch 12 before the Key-SW is turned off is set.

Control sequence
A control sequence in the traveling control unit 11 will be described with reference to FIG. Here, "D" is 1-3 speed automatic shift (mode), "S" is 2 speed start automatic shift (mode), "1" is 1 speed fixed (mode), "2" is 2 speed fixed (mode) It is.

  Further, as shown in FIG. 3C, the display panel 22 is provided with a PE mode switching switch 14, a speed display unit 22a, and a drive mode display unit 22b. In FIG. 6, the drive mode (VCM to meter display) and the 2-speed start shift mode (VCM to meter display) indicate display signals to the drive mode display section 22b.

  The 1-3 shift automatic transmission mode is selected by the drive mode selection switch 12, and "D" is displayed on the drive mode display section 22b.

  When the 2-speed start mode switch 13 is operated (first time) during driving in the 1-3-speed automatic shift mode at T1, the 1-3-speed automatic shift mode is canceled and the 2-speed start automatic shift mode is set. The shift is made, and "S" is displayed on the drive mode display unit 22b.

  When the 2-speed fixed mode is selected by the drive mode selection switch 12 at T2, the 2-speed start automatic shift mode is cancelled, the 2-speed fixed mode is set, and the drive is performed in the 2-speed fixed mode. "S" is displayed.

  When the first speed fixing mode is selected by the drive mode selection switch 12 at T3, the second speed fixing mode is canceled and the first speed fixing mode is set, and the first speed fixing mode is driven and "1" is displayed on the drive mode display section 22b. Is displayed.

  When the 2nd gear start mode switch 13 is operated (first time) at T4, the 2nd gear start automatic shift mode is set, the drive is made in the 2nd gear start automatic shift mode, and "S" is displayed on the drive mode display section 22b .

  At T5, the key switch (power switch) is turned off. Thereafter, when the key switch is turned on again after being restarted, the 2-speed start automatic shift mode before the key switch is turned off is canceled, and the 1-speed fixed mode selected by the drive mode selection switch 12 is restored. Then, it is driven in the 1-speed fixed mode and "1" is displayed on the drive mode display section 22b.

  When the 2-speed start mode switch 13 is operated (first time) at T6, the 2-speed start automatic shift mode is set, the drive is performed in the 2-speed start automatic shift mode, and "S" is displayed on the drive mode display section 22b. .

When the 2nd gear start mode switch 13 is operated (second time) at T7, the 2nd gear start automatic transmission mode is canceled and returned to the 1st gear fixed mode, and the 1st gear fixed mode is driven to drive mode display section 22b. "1" is displayed on.
(Effect of the embodiment)
According to the above embodiment, the first operation of the 2-speed start mode switch 13 is operated during driving in the 1-3-speed automatic shift mode or the 1-speed fixed mode or the 2-speed fixed mode selected by the drive mode selection switch 12 Then, the drive mode selected by the drive mode selection switch 12 is canceled and shifted to the 2-speed start automatic shift mode. Next, when the second gear of the 2-speed start mode switch 13 is operated, the drive mode is returned to the previously selected drive mode, so that the drive mode is changed, such as transporting long heavy objects or handling cargo on slippery road surfaces. It is possible to respond quickly and easily and improve the working efficiency.

  The drive mode selection switch 12 is an alternate operation type switch, the 2-speed start mode switch 13 is a momentary operation type switch, and the 2-speed start automatic transmission mode and the drive are operated by the first and second operations of the 2-speed start mode switch 13 The shift can be repeated between the selected drive mode selected by the mode selection switch 12 and the operability of the drive mode can be improved.

  Furthermore, during driving in the 2-speed start automatic shift mode, it is reset by the operation of the drive mode selection switch 12, and is further shifted to the drive mode selected by the drive mode selection switch 12 by the reset or by the operation of the power switch. Since the 2-speed start mode switch 13 is additionally operated with respect to the drive mode selection switch 12 as the operation main body by resetting the 2-speed automatic shift mode before the operation, the operation of the drive mode is clarified Operation is reduced, and operability is improved.

  Although the engine type forklift has been described in the above embodiment, the present invention can be similarly applied to a battery type forklift having a transmission.

TM Transmission 11 Drive control unit 12 Drive mode selection switch 13 2nd gear start mode switch 14 PE mode switch 15 Vehicle speed detector 16 Accelerator opening degree detector 17 Engine speed detector 22b Drive mode indicator

21. Select 2-speed fixed mode of drive mode selection switch 12 (STEP. 22), drive in 2-speed fixed mode (STEP. 23),
The first operation of the 2nd gear start mode switch 13 (STEP. 24) and the shift to the 2nd gear automatic start shift mode (STEP. 25) while driving in the 22.2 speed fixed mode.
23. 2nd gear start mode operation of the 2nd gear start mode switch 13 during the drive of 2nd gear start automatic shift mode (STEP. 26), return to the 2nd gear fixed mode (STEP. 23).

In T2, the by the drive mode selection switch 12 is the second speed fixed mode is selected, is canceled 2 speed start automatic shift mode becomes to second speed fixed mode, is driven by the drive mode display section 22b at the second speed fixed mode " 2 " is displayed.

Claims (6)

A drive mode selection switch capable of selecting one of a plurality of drive modes including at least a 1st-2nd-3rd automatic shift mode;
A second speed start mode switch capable of selecting a second speed automatic transmission mode in which the second speed and third speed are automatically shifted;
During the drive in the drive mode selected by the drive mode selection switch, the second shift start automatic transmission mode is shifted by operating the second shift start mode switch for the first time, and the second shift start mode switch is operated for the second time And a drive control unit configured to return to the drive mode selected by the drive mode selection switch. The driving mode selection switch is capable of selecting a 1-speed fixed mode and a 2-speed fixed mode in addition to a 1-speed, 2-speed and 3-speed automatic shift mode. Control device. The travel control device for a cargo handling vehicle according to claim 1 or 2, wherein the drive mode selection switch is an alternate operation type switch, and the two-speed start mode switch is a momentary operation type switch. The drive control unit resets the second speed automatic transmission mode by the selection operation of the drive mode selection switch during driving in the second speed automatic transmission mode, and the drive mode selected by the drive mode selection switch by the reset The travel control device for a cargo handling vehicle according to any one of claims 1 to 3, wherein the vehicle is shifted. The travel control device for a cargo handling vehicle according to any one of claims 1 to 4, wherein the travel control unit is configured to reset the 2-speed start automatic shift mode by an operation of a power switch of the cargo handling vehicle. A cargo handling vehicle comprising the travel control device according to any one of claims 1 to 5.

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