JP2010052894A - Industrial vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an industrial vehicle capable of preventing water from reaching a battery and improving battery cooling performance by supplying cold air to the battery. <P>SOLUTION: A forklift 11 is provided with rear peelers 21, 22 behind a driver's seat 24. An air conditioner 33 is mounted on an upper face 23a of a head guard 23. The battery 31 is mounted on a counterweight W behind the driver's seat 24. The air conditioner 33 and the battery 31 are mutually connected through an upper side duct 34, the rear peeler 22 on the left side, a branched duct 35, a blower 36, and an introduction duct 37 to cool the battery 31 by the cold air supplied from the air conditioner 33. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an industrial vehicle equipped with a battery.

Conventionally, a battery housing portion is provided so as to extend downward from a floor surface that supports the seated driver's feet, and the upper end of the battery housed in the battery housing portion is provided at a position lower than the floor surface. A battery forklift has been proposed (see, for example, Patent Document 1).
JP-A-11-222390

  In the battery forklift described in Patent Document 1, since the battery is disposed under the floor surface and the floor surface is frequently flooded when the car is sprinkled, water intrusion is performed so that water does not enter the battery housing portion. It is necessary to take preventive measures (for example, a seal between the upper opening of the battery housing and the battery hood and toe board). However, when such water intrusion prevention measures are taken, it is difficult to introduce cool air from the outside of the vehicle body into the battery housing portion, and forced air cooling cannot be performed on the battery. In particular, when a nickel metal hydride storage battery or a lithium ion storage battery is used as the battery, sufficient electric power cannot be obtained from the battery when the temperature of the battery rises. Was demanded.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an industrial vehicle capable of suppressing the moisture of the battery and improving the cooling performance of the battery by supplying cool air to the battery. There is to do.

  In order to achieve the above object, the invention described in claim 1 is provided with a pillar that supports the head guard and is positioned rearward of the seat on which the occupant sits, and the occupant's feet are placed below the seat. In an industrial vehicle equipped with a battery to be used as an energy source and provided with a floor to be supported, an intake portion for taking in cold air for cooling the battery, and the inside of the pillar as a passage for cold air and taking in at the intake portion A cool air introduction section that guides the cool air to the battery, and the battery is disposed behind the seat and above the floor surface.

  In this invention, even if water enters under the floor surface, the battery is not placed under the floor surface, so the battery is not exposed to water, and even when the water is washed, the water is behind the seat. Is hard to take. Therefore, there is no problem in the battery even if the water intrusion prevention measure is simplified. And since cold air can be introduce | transduced to a battery by a cold air introduction part and a battery can be cooled with cold air, the cooling performance with respect to a battery can be improved.

  According to a second aspect of the present invention, in the first aspect of the present invention, the head guard or the pillar includes a cold air supply unit, and the cold air introduction unit receives the cold air supplied from the cold air supply unit. The gist of the invention is that the battery is guided to the battery.

  When the outside air is cold air for cooling the battery, the cooling effect on the battery is reduced when the outside air temperature is high. In this invention, the battery is cooled using the cold air of the cooling supply means. It can suppress that the cooling effect with respect to a battery fluctuates.

  According to a third aspect of the present invention, in the second aspect of the present invention, the cold air introduction section connects the cold air supply means and the pillar, and cool air supplied from the cold air supply means is introduced into the pillar. The gist is provided with a first duct for guiding and a second duct for guiding cool air flowing inside the pillar to the outside of the pillar and guiding it to the battery.

  In this invention, even if the cold air supply means is arranged away from the pillar, the cold air supply means and the pillar can be connected using the first duct, and the second duct is arranged even if the battery is arranged away from the pillar. It can be used to guide cool air down to the battery. Therefore, there are less restrictions on the arrangement received when the cold air supply means and the battery are provided, and the degree of freedom in the arrangement of the cold air supply means and the battery is improved.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the cold air introduction part is located downstream of the pillar in the flow path of the cold air in the cold air introduction part. The gist is provided with an air blowing means provided, and the air blowing means sucks cool air inside the pillar and sends it to the battery.

  In this invention, a battery can be cooled more efficiently by using a ventilation means. Further, compared to the case where the air blowing means is provided on the upstream side of the pillar, the distance of the cold air flow path from the air blowing means to the battery can be shortened, and the cold air sent from the air blowing means reaches the battery. It is possible to suppress a decrease in the momentum of the cold air flow before the start. Therefore, it can suppress that the flow volume of the cool air per unit time supplied to a battery reduces.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the battery is disposed on a counterweight and is located above a center of the counterweight. This is the gist.

  In this invention, since the battery can be arranged farther from the bottom of the floor, it is possible to reliably avoid the battery from getting wet.

  ADVANTAGE OF THE INVENTION According to this invention, while suppressing the moisture of a battery, cold air can be supplied to a battery and the cooling performance with respect to a battery can be improved.

  Hereinafter, an embodiment in which the present invention is embodied in a hybrid forklift will be described with reference to FIGS. In the following description, “front”, “back”, “left”, “right”, “up”, and “down” are based on the state in which the forklift driver faces the front (forward direction) of the vehicle. “Front”, “Back”, “Left”, “Right”, “Up”, “Down” are shown.

  As shown in FIG. 1A, a mast 13 is provided on the front side of a vehicle body 12 of a hybrid forklift (hereinafter referred to as “forklift”) 11. The mast 13 is equipped with a fork 14 that can be lifted and lowered via a lift bracket B, and the fork 14 is lifted and lowered together with the lift bracket B by the expansion and contraction operation of the lift cylinder 15.

  A driving wheel (front wheel) 16 is provided at the front lower part of the vehicle body 12, and a steering wheel (rear wheel) 17 is provided at the rear lower part of the vehicle body 12. The drive wheels 16 are driven by a travel motor 19 via a differential (not shown) and a gear (not shown) provided on the axle 18. The steered wheel 17 is steered according to the operation amount of the handle H.

  The vehicle body 12 includes a vehicle body frame F and a counterweight W fastened and fixed to the rear portion of the vehicle body frame F. The vehicle body frame F is formed by integrating a plurality of thick plates (steel plates) by welding, and the counterweight W is made of a casting. A pair of left and right front pillars 20 are erected on the front side of the body frame F, and a pair of left and right rear pillars 21 and 22 are erected on the rear side. The front pillar 20 is formed integrally with the head guard 23. Further, the front pillar 20 and the rear pillar 21 are formed in a hollow shape (see FIG. 1B). A cab D is configured by a space surrounded by the front pillar 20, the rear pillar 21, and the head guard 23. A toe board 25 as a floor surface for supporting a driver's foot seated on the driver's seat 24 is provided below the front side of the driver's cab D. A front pillar 20 is located in front of the operation seat 24. Further, rear pillars 21 and 22 are located behind the operation seat 24. Below the operation seat 24, an engine 26, a clutch 27, a motor generator (generator motor) 28, and a hydraulic pump 29 are fixed to the rear portion of the vehicle body frame F and are installed in a state covered with a hood 30. . The right rear pillar 21 (see FIG. 1B) is provided with an air inlet (not shown) for supplying air to the engine 26. The right rear pillar 21 uses the hollow portion (not shown) as an air circulation passage, and the air introduced from the air introduction port is guided to the intake portion (intake pipe) of the engine 26 through the hollow portion.

  In the forklift 11 of the present embodiment, the engine 26 is disposed behind the center of the vehicle body 12, and a motor generator 28 is connected via a clutch 27. A battery 31 is disposed on the counterweight W diagonally above the engine 26 and the motor generator 28.

  As shown in FIG. 1B, the battery 31 is located behind the operation seat 24 and is disposed adjacent to the left rear pillar 21. The battery 31 is arranged so as not to obstruct the rear view of the occupant seated on the operation seat 24, and is covered with a battery protection cover (not shown) so as not to be exposed to the outside. As shown in FIG. 2, the battery 31 is formed in a rectangular parallelepiped shape and is accommodated in an accommodation recess 32 formed on the upper surface Wa of the counterweight W. The housing recess 32 is formed so as to extend in the vehicle width direction, and its inner side surface is formed along the side surface of the battery 31. The battery 31 is formed so that its vertical width is larger than the vertical width of the housing recess 32, and its entirety is located above the center P of the counterweight W in the vertical direction. The center P of the counterweight W is a portion corresponding to the center of the region from the lowermost end of the counterweight W to the uppermost end of the counterweight W in the vertical direction. The rear side portion 31b of the battery case 31a is provided above the opening edge of the housing recess 32, and an inlet portion (not shown) for introducing cool air into the battery case 31a is provided at a portion near the right end. ing. The battery 31 is configured by housing a plurality of battery cells in a battery case 31a. As the battery 31, for example, a nickel metal hydride storage battery is used, and the battery 31 is a battery that easily accepts a regenerative current. A temperature sensor 39 (see FIG. 4) for detecting the surface temperature of the battery 31 is attached to the battery 31 and is configured to be able to supply driving power as needed for traveling operation and cargo handling operation of the forklift 11. Yes. An air conditioner (hereinafter referred to as an air conditioner) 33 as a cold air supply means is attached to the upper surface 23a of the head guard 23. The head guard 23 is provided with a plurality of holes 23b for securing the upper field of view.

  The air conditioner 33 has a modularized configuration in which an electric compressor, a condenser (condenser), a receiver, and the like are integrated together. And as shown to Fig.3 (a), as for the air conditioner 33, the blower outlet which is not shown in figure is connected to the entrance part 34a of the upper side duct 34 as a 1st duct. The outlet 34b of the upper duct 34 is connected to the upper portion of the left rear pillar 22 and communicates with the hollow portion 22a of the rear pillar 22 (see FIG. 1B). The upper duct 34 is provided so as to pass through the hole 23c provided in the head guard 23, and extends obliquely to the left from the air conditioner 33 side toward the rear pillar 22 side. In this embodiment, the hole for securing the upper field of view provided in the head guard 23 is used as the hole 23c for allowing the upper duct 34 to pass therethrough. As shown in FIG. 3 (b), the left rear pillar 22 is connected to an inlet portion 35 a of a branch duct 35 at a portion below the portion to which the outlet portion 34 b of the upper duct 34 is connected. Therefore, the inlet portion 35 a of the branch duct 35 communicates with the hollow portion 22 a of the left rear pillar 22 on the downstream side of the outlet portion 34 b of the upper duct 34. In addition, the outlet portion 35b of the branch duct 35 is connected to a suction port portion 36a of a blower 36 as a blowing means. An inlet portion 37 a of the introduction duct 37 is connected to the delivery port portion 36 b of the blower 36. The blower 36 is configured to suck in cool air from the hollow portion 22a of the rear pillar 22 through a branch duct 35 located above the blower 36, and to feed cool air into an introduction duct 37 provided on the right side of the blower 36. ing.

  Further, the outlet portion 37 b of the introduction duct 37 is connected to an inlet portion (not shown) of the battery 31. The introduction duct 37 is configured to guide the cold air fed from the blower 36 into the battery case 31a, and the passage cross-sectional area in the direction orthogonal to the flow direction of the cold air flowing through the introduction duct 37 is an outlet from the inlet portion 37a side. It forms so that it may become large as it goes to the part 37b side. The blower 36 and the introduction duct 37 are disposed at substantially the same height as the battery 31. The cold air supplied from the air conditioner 33 is taken into the upper duct 34 by the inlet 34 a of the upper duct 34, and then the battery 31 is supplied by the upper duct 34, the rear pillar 22, the branch duct 35, the blower 36, and the introduction duct 37. To be introduced. Therefore, the cold air introduction part that introduces the cold air supplied from the air conditioner 33 to the battery 31 is the upper duct 34, the rear pillar 22, the branch duct 35, the blower 36, and the introduction duct 37, and the cold air supplied from the air conditioner 33. The intake portion for taking in the air is the inlet portion 34 a of the upper duct 34. Moreover, the inlet part 34a of the upper side duct 34 as an intake part is a part of cold air introduction part. The battery case 31a of the battery 31 has a discharge port (not shown) for discharging the cold air introduced into the battery case 31a to the outside of the battery case 31a. Therefore, the cold air introduced into the battery 31 reaches the innermost battery cell and is then discharged from the discharge port. And the exhaust_gas | exhaustion discharged | emitted from the discharge port is comprised so that it may be discharged | emitted outside the vehicle through the discharge passage which is not shown in figure.

Next, the electrical configuration of the forklift 11 will be described.
As shown in FIG. 4, the vehicle control device 38 that is mounted in the vehicle body 12 and controls the cargo handling operation and the traveling operation of the forklift 11 has a CPU (Central Processing Unit) that can execute the control operation in a predetermined procedure. ) 40, a RAM (Random Access Memory) 41, and a ROM (Read Only Memory) 42. The ROM 42 stores a control program for controlling various operations such as traveling and cargo handling of the forklift 11.

  In addition, a temperature sensor 39 that outputs the surface temperature of the battery 31 as a temperature signal is electrically connected to the vehicle control device 38. The vehicle control device 38 is configured to calculate the temperature signal input from the temperature sensor 39 and grasp the battery temperature T. Here, the battery 31 has a characteristic that the output power of the battery 31 is small when the battery temperature T is higher than that at room temperature. That is, when the battery temperature T is in the normal temperature range, output power of a predetermined magnitude or more can be secured from the battery 31, and output power that can normally perform vehicle operation can be secured. On the other hand, when the battery temperature T is higher than the upper limit temperature of the normal temperature range, the output power of the battery 31 is limited to, for example, 10% or less compared to the output when the battery temperature T is within the normal temperature range. The output power of the battery 31 decreases as the vehicle operation is hindered. The battery 31 has the same characteristics as the relationship between the output power of the battery 31 and the battery temperature T in the relationship between the input power of the battery 31 and the battery temperature T. Therefore, if vehicle control device 38 determines that battery temperature T is higher than temperature T1, based on the detection result from temperature sensor 39, with the upper limit temperature in the normal temperature range set to temperature T1 (for example, 35 ° C. to 45 ° C.). The control for lowering the battery temperature T is executed.

  Further, the blower 36, the air conditioner 33, the traveling motor 19, the engine 26, and the motor generator 28 are electrically connected to the vehicle control device 38. The vehicle control device 38 is configured to give control commands to the blower 36, the air conditioner 33, the engine 26, the motor generator 28, and the traveling motor 19 to perform predetermined control. The air conditioner 33 is configured to supply cold air from an outlet (not shown) when a drive command is output from the vehicle control device 38.

  In addition, the motor generator 28 is driven by the engine 26 to generate electric power, and the battery (secondary battery) 31 is charged (charged). The motor generator 28 receives the driving power from the battery 31 and drives the hydraulic pump 29 as a motor. The motor mode can be switched appropriately. This switching control is performed based on a command from the control device via an inverter assembly (not shown).

  When the motor generator 28 is in the power generation mode, the engine 26 becomes a drive source for the motor generator 28 and the hydraulic pump 29. On the other hand, when the motor generator 28 is in the motor mode, the engine 26 and the motor generator 28 serve as driving sources for the hydraulic pump 29. However, it is possible to disengage the clutch 27 in the motor mode and use only the motor generator 28 instead of the engine 26 as the drive source of the hydraulic pump 29. When motor generator 28 is in the motor mode, battery 31 is used as an energy source for motor generator 28. The connection / disconnection control of the clutch 27 is performed by a control signal from the vehicle control device 38. That is, the motor generator 28 functions as a motor as a drive unit of the hydraulic pump 29 in the motor mode.

  The battery 31 stores the electricity generated by the motor generator 28 in the power generation mode, and appropriately supplies driving power as necessary for the traveling operation and the cargo handling operation of the forklift 11. Power storage in the battery 31 and discharge from the battery 31 are controlled via an inverter assembly connected to the vehicle control device 38.

Next, the operation of the forklift 11 configured as described above will be described.
When the forklift 11 is sprinkled and washed, the toe board 25 is frequently flooded, and water may enter the machine base under the toe board 25. However, since the battery 31 is not disposed under the toe board 25 and is disposed behind the operation seat 24, the battery 31 is not flooded.

  Further, when the battery 31 is operated for a long time or when the ambient temperature of the forklift 11 is high, the battery temperature becomes high. When the battery temperature T becomes higher than the temperature T1, the operation of the forklift 11 is hindered. Therefore, when the vehicle control device 38 determines that the battery temperature T has become higher than the temperature T1, the vehicle control device 38 drives the air conditioner 33 and the blower 36.

  Then, the air conditioner 33 blows out cold air, and the cold air blown out from the air conditioner 33 is taken into the upper duct 34 from the inlet portion 34a. Thereafter, the cold air taken into the upper duct 34 flows into the hollow portion 22 a of the rear pillar 22. The cold air flowing into the hollow portion 22 a of the rear pillar 22 is sucked by the blower 36 via the branch duct 35, and the sucked cold air is sent toward the battery 31. The sent cool air is applied to the battery cell inside the battery 31, and the battery cell is forcibly cooled by the cool air. Therefore, the battery 31 is kept below the upper limit temperature, and the forklift 11 can always take out necessary power from the battery 31. Then, the vehicle control device 38 monitors the battery temperature. When the vehicle control device 38 determines that the battery temperature T has fallen within the normal temperature range, the vehicle control device 38 stops the drive command output to the air conditioner 33 and the blower 36, and The cooling of 31 is finished.

  Further, the cold air supplied from the air conditioner 33 is introduced to the battery 31 by using the inside of the hollow portion 22a of the rear pillar 22 as a passage. Therefore, compared to the case where all the parts from the air conditioner 33 to the battery 31 are connected by a duct without using the rear pillars 21 and 22, the hollow portion 22a of the existing rear pillar 22 is used as a cold air passage. There is no sense of incongruity as the appearance of the forklift 11.

According to this embodiment, the following effects can be obtained.
(1) The battery 31 is disposed behind the operation seat 24. Therefore, even when the forklift 11 is watered and washed, the battery 31 can be prevented from getting wet.

  (2) Cold air is introduced into the battery 31 via the upper duct 34, the rear pillar 22, the branch duct 35, the blower 36, and the introduction duct 37. Therefore, when the temperature of the battery 31 rises, cold air can be supplied to the battery 31 to forcibly cool the battery 31, so that the cooling performance for the battery 31 can be improved.

  (3) An air conditioner 33 is attached to the head guard 23. When the air conditioner 33 is driven, the cool air discharged from the air conditioner 33 is guided to the battery 31 to cool the battery 31. Therefore, since the temperature of the cool air supplied to the battery 31 does not fluctuate due to the outside air temperature, the cooling effect on the battery 31 fluctuates due to the influence of the outside air temperature as compared with the case where the battery 31 is cooled using the outside air. Can be suppressed.

  (4) Cold air is supplied from the air conditioner 33 to the battery 31 using the hollow portion 22a of the rear pillar 22 as a cold air passage. Therefore, compared with the case where the structure for introducing cold air from the air conditioner 33 to the battery 31 is entirely constituted by ducts, for example, the appearance of the forklift 11 is not uncomfortable, and a decrease in design of the forklift 11 can be suppressed.

(5) The air conditioner 33 is attached to the upper surface 23 a of the head guard 23. Therefore, it is possible to suppress the air conditioner 33 from blocking the rear view of the occupant seated on the operation seat 24.
(6) The cold air passage formed by the upper duct 34, the rear pillar 22, and the branch duct 35 is configured such that the flow of the cold air is from the top to the bottom. Therefore, the cool air from the air conditioner 33 toward the branch duct 35 flows from the top to the bottom, and the cool air can be smoothly directed to the branch duct 35.

  (7) A blower 36 is provided between the branch duct 35 and the introduction duct 37. Therefore, since the cool air in the hollow portion 22a of the rear pillar 22 is sucked by the blower 36 and the cool air can be sent from the blower 36 toward the battery 31, the battery 31 can be efficiently cooled.

  (8) On the cold air flow path from the air conditioner 33 to the battery 31, the blower 36 is provided on the downstream side of the rear pillar 22. Therefore, the distance of the distribution path from the blower 36 to the battery 31 can be shortened, and the cold air sent from the blower 36 can be supplied to the battery 31 without circulating the hollow portion 22a of the rear pillar 22. As a result, it is possible to suppress the momentum of the cool air sent from the blower 36 from reaching the battery 31 and to suppress the flow rate of the cool air per unit time supplied to the battery 31 from decreasing.

  (9) The battery 31 is disposed on the counterweight W and is located above the center P of the counterweight W. Therefore, since the battery 31 can be arranged away from the bottom of the toe board 25, the water of the battery 31 can be reliably avoided.

  (10) The battery 31 is disposed adjacent to the rear pillar 22. Therefore, it is not necessary to unnecessarily extend the branch duct 35 and the introduction duct 37 constituting the cold air flow path from the rear pillar 22 to the battery 31.

The embodiment is not limited to the above, and may be configured as follows, for example.
○ The blower 36 may be omitted. For example, when the air conditioner 33 with a built-in blower is used, the cool air can be smoothly supplied to the battery 31 even if the blower 36 is omitted.

  O The arrangement position of the battery 31 may be changed. For example, as shown in FIG. 5, a battery 31 may be provided in front of the counterweight W and behind the operation seat 24. Further, the battery 31 may be disposed so as to cover the region between the counterweight W and the operation seat 24 and the upper surface Wa of the counterweight W. However, in this case, it is necessary to arrange the battery 31 in consideration of the arrangement position of the hood 30 so that the hood 30 and the battery 31 do not interfere with each other when the opening / closing operation is performed. Such an arrangement of the battery 31 is suitable for the forklift 11 equipped with a counterweight W having a narrower front-rear width than the front-rear width of the battery 31.

  ○ The configuration of the rear pillar 22 may be changed. For example, for the solid rear pillar 22, cold air flows through the inside of the rear pillar 22 by providing a hole that opens from the side surface at the top of the rear pillar 22 to the side surface at the bottom of the rear pillar 22 through the inside of the rear pillar 22. You may comprise as follows.

  The rear pillar that introduces the cool air supplied from the air conditioner 33 may not be the left rear pillar 22. For example, when it is preferable for the arrangement of the engine 26 and the battery 31, air for intake of the engine 26 is introduced using the left rear pillar 22, the inside of the right rear pillar 21 is used as a cold air passage, and cold air is supplied to the battery 31. You may comprise so that it may introduce to.

  The rear pillar 21 through which air for intake air of the engine 26 circulates and the rear pillar 22 through which cold air for cooling the battery 31 circulate need not be separated. For example, cool air supplied from the air conditioner 33 flows through the hollow portion 22 a of the left rear pillar 21, a duct connecting the left rear pillar 22 and the battery 31, intake air of the left rear pillar 22 and the engine 26. You may provide the duct which connects a part. With this configuration, the cold air supplied from the air conditioner 33 can be guided to both the battery 31 and the intake passage of the engine 26 using the single rear pillar 22.

  ○ The arrangement position of the air conditioner 33 may be changed. The air conditioner 33 may not be directly attached to the upper surface 23a of the head guard 23. For example, a bracket may be attached to the head guard 23 and the air conditioner 33 may be suspended from the head guard 23 by the bracket so that the air conditioner 33 is positioned in the vicinity of the head guard 23. Further, the air conditioner 33 may be provided in the rear pillars 21 and 22. In this case, for example, a bracket may be attached to the upper part of the rear pillars 21 and 22, and the air conditioner 33 may be attached to the rear pillars 21 and 22 via the bracket.

  ○ An intake hole for taking in cold air may be provided in the head guard 23, and the intake hole may be used as the intake portion. In this case, for example, the upper duct 34 as the first duct is omitted, the head guard 23 is configured so that the intake portion provided in the head guard 23 communicates with the hollow portion 22a of the rear pillar 22, and the air conditioner 33 If the blowout port (not shown) and the intake portion are connected to communicate with each other, the cold air can be introduced from the intake portion of the head guard 23 to the battery 31.

  ○ The air conditioner 33 may be omitted. In this case, for example, the air conditioner 33 and the upper duct 34 may be omitted, and an intake hole may be provided in the upper part of the rear pillars 21 and 22 so that the intake hole is used as the intake part. And outside air may be taken in into the inside of the rear pillars 21 and 22 from the intake part of the rear pillars 21 and 22, and the taken-out outside air may be used as cold air for battery 31 cooling. Further, an intake hole as an intake portion may be provided in order to take outside air into the head guard 23, and the outside air taken in from the intake portion of the head guard 23 may be used as cold air for cooling the battery 31.

The battery 31 is not limited to a nickel metal hydride storage battery, and may be another secondary battery such as a lithium ion battery, a capacitor, or a super capacitor.
The present invention is not limited to a hybrid forklift, and may be applied to all industrial vehicles equipped with a battery. For example, it may be applied to a battery-type forklift, or may be applied to a fuel cell forklift equipped with a battery.

The following technical idea (invention) can be understood from the embodiment.
(B) The industrial vehicle according to any one of claims 1 to 4, wherein the battery is disposed adjacent to the rear pillar.

(A) is a schematic side view of a forklift, (b) is a schematic partial rear view of a forklift. The schematic partial perspective view at the time of seeing a forklift from the rear side. (A) is a schematic partial perspective view which shows an air conditioner, an upper side duct, the left rear pillar, and a branch duct, (b) is a schematic partial perspective view which shows a branch duct, a blower, an introduction duct, and a battery. The block diagram which shows the electric constitution of a forklift. The schematic partial perspective view of the forklift in another embodiment.

Explanation of symbols

  P ... center, W ... counter weight, 11 ... hybrid forklift, 21,22 ... rear pillar, 23 ... head guard, 24 ... operating seat as seat, 31 ... battery, 33 ... air conditioner as cold air supply means, 34 ... An upper duct as a first duct, 34a... An inlet section as an intake section, 35... A branch duct as a second duct, 36.

Claims (5)

A pillar that supports the head guard and is positioned behind the seat on which the occupant sits is provided, and a floor surface that supports the occupant's feet is provided below the seat, and a battery that is used as an energy source is mounted. In industrial vehicles,
An intake for taking in cold air to cool the battery;
The inside of the pillar is used as a cold air passage, and includes a cold air introduction part that guides the cold air taken in by the intake part to the battery,
The industrial vehicle, wherein the battery is disposed behind the seat and above the floor surface. Comprising cold air supply means provided in the head guard or the pillar,
The industrial vehicle according to claim 1, wherein the cold air introduction unit is configured to guide the cold air supplied from the cold air supply unit to the battery. The cold air introduction unit connects the cold air supply unit and the pillar, and a first duct that guides the cold air supplied from the cold air supply unit to the inside of the pillar;
The industrial vehicle according to claim 2, further comprising: a second duct that guides cool air flowing inside the pillar to the outside of the pillar and guides the air to the battery. The cold air introduction unit includes a blower provided on the downstream side of the pillar in the flow path of the cold air in the cold air introduction unit,
The industrial vehicle according to any one of claims 1 to 3, wherein the blower sucks cold air inside the pillar and sends the cold air toward the battery.   The industrial vehicle according to any one of claims 1 to 4, wherein the battery is disposed on a counterweight and is located above a center of the counterweight.

Images