JP2005001819A - Battery type industrial vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery type industrial vehicle where movements of a battery in a battery chamber can be prevented while the vehicle is running, and the battery can be easily moved and the strength of a battery stopper can be reduced at the time of changing the battery. <P>SOLUTION: A battery storing chamber 14 capable of storing the battery 11 from an opening part 13 of a car body 12 is provided in the car body 12. The battery storing chamber 14 is equipped with a floor part 20 capable of supporting the bottom surface of the battery 11. A plurality of supporting rollers 23 for supporting the bottom surface of the battery 11 is provided for the floor part 20 of the battery storing chamber 14 to be freely projected and recessed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery-type industrial vehicle, and more particularly, to a battery-type industrial vehicle that can receive or draw a battery through an opening with respect to a battery storage chamber provided in the vehicle body.
[0002]
[Prior art]
For example, in a battery-type industrial vehicle including a battery as a driving source for traveling such as an electric vehicle or a battery-type forklift, it is necessary to replace the battery for charging the battery.
In such a battery-type industrial vehicle, the battery is replaced by pulling the battery from the body of the battery-type industrial vehicle onto the battery replacement cart using the battery replacement cart, or by accommodating the battery in the vehicle body from the battery replacement cart. It is carried out.
For example, in the conventional battery-type forklift 40 shown in FIG. 5, the battery 41 is stored in the battery storage chamber 44 provided in the vehicle body 42.
[0003]
Although the battery 41 is accommodated in the battery accommodating chamber 44 through the opening 43, the battery accommodating chamber 44 is devised to make it possible to move the heavy battery 41 as much as possible.
That is, as shown in FIG. 6, the floor 46 of the battery storage chamber 44 is provided with a large number of support rollers 47, and the rolling direction of these support rollers 47 is indicated by an arrow M in FIG. This coincides with the moving direction of the battery 41.
Accordingly, the battery 41 in the battery storage chamber 44 is supported by these support rollers 47, and the support roller 47 rolls with the movement of the battery 41 when the battery is replaced. It will be enough.
[0004]
In addition, the forklift 40 is provided with a battery stopper 45 in the vicinity of the opening 43 so that the battery 41 does not jump out of the battery housing chamber 44 during traveling.
The battery stopper 45 is in a state of protruding from the opening 43 when the battery 41 is housed in the battery housing chamber 44, and is movable so that it can be retracted from the opening 43 when replacing the battery. (For example, see Patent Documents 1 and 2.)
According to the forklift 40, when the battery is replaced, the movement of the battery 41 is facilitated by the rolling of the support roller 47, and the battery stopper 45 reliably prevents the battery 41 from popping out during traveling. The advantage of being able to
[0005]
[Patent Document 1]
Japanese Utility Model Publication No. 63-29850 (first page, FIG. 1)
[Patent Document 2]
Japanese Utility Model Publication No. 64-47797 (first page, FIGS. 1 to 3)
[0006]
[Problems to be solved by the invention]
However, the forklift 40 has the following problems.
The first problem is that the battery 41 is always easily moved in the width direction of the vehicle body 42 in the battery housing chamber 44.
In other words, since the battery 41 is supported by the support roller 47, the battery 41 is in a state of moving even if a slight force is applied to the battery 41. For this reason, when the vehicle body 42 changes direction during traveling, the battery 41 in the battery storage chamber 44 receives the inertial force due to the change of direction and moves in the width direction of the vehicle body 42 in the battery storage chamber 44, so 41 will collide and a vibration and a noise will arise.
As a second problem, when the battery 41 moves in the width direction of the vehicle body 42 during traveling, the battery 41 also collides with the battery stopper 45, so that the battery stopper 45 can withstand the collision of the battery 41. The strength is that it must have strength.
[0007]
The present invention has been made in view of the above problems, and an object of the present invention is to prevent the movement of the battery in the battery chamber during traveling, and to move the battery when replacing the battery. The battery-operated industrial vehicle can reduce the strength of the battery stopper.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a battery housing chamber capable of housing a battery from an opening of the vehicle body is provided in the vehicle body, and a floor portion capable of supporting the bottom surface of the battery is provided in the battery housing chamber. And a plurality of support rollers for supporting the bottom surface of the battery so as to be able to protrude and retract with respect to the floor of the battery storage chamber.
[0009]
According to the first aspect of the present invention, when replacing the battery, the support roller protrudes from the floor of the battery storage chamber, and the battery is moved on the support roller, thereby reducing the labor required for moving the battery. Is done.
On the other hand, when the battery is accommodated in the battery accommodating chamber and the vehicle travels, the support roller is buried from the floor portion of the battery accommodating chamber, and the bottom surface of the battery is supported on the floor portion of the battery accommodating chamber.
When the bottom surface of the battery is supported by the floor of the battery storage chamber, the battery is stored in the battery due to the frictional force between the bottom surface of the battery and the floor of the battery storage chamber even if the traveling vehicle body changes direction. There is no movement in the width direction of the vehicle body in the room.
[0010]
Therefore, the battery does not collide with the vehicle body during traveling, and vibration and noise due to the collision between the battery and the vehicle body do not occur.
In addition, when the battery is replaced, the battery is supported by the support roller, so that a force required for moving the battery is only a small force.
Furthermore, since the battery does not collide with the battery stopper when the vehicle body is traveling, the strength of the battery stopper can be reduced.
[0011]
According to a second aspect of the present invention, in the battery-powered industrial vehicle according to the first aspect, a roller holder for supporting a plurality of support rollers and a lifting means for moving the roller holder up and down are provided. .
According to the second aspect of the present invention, since the plurality of support rollers are supported by the roller holder, the raising and lowering means raises and lowers the roller holder so that the support roller protrudes and protrudes from the floor of the battery storage chamber. Is planned.
Therefore, a plurality of support rollers can be made to appear and disappear together from the floor of the battery storage chamber simply by raising and lowering the roller holder, and each support roller can receive the load of the battery almost evenly.
[0012]
According to a third aspect of the present invention, in the battery-powered industrial vehicle according to the second aspect, the drive source of the lifting / lowering means is an oil pump for a cargo handling device, a hydraulic pipe for connecting the lifting / lowering means and the oil pump is provided, A switching valve is provided in the pipe, and hydraulic oil is supplied from the oil pump to the lifting means by switching the switching valve.
According to the third aspect of the present invention, since the drive source of the lifting / lowering means is an oil pump for a cargo handling device, the oil pump is operated as a drive source of the lifting / lowering means when the battery is replaced.
Further, the hydraulic oil is supplied from the oil pump for the cargo handling device to the hydraulic pipe by switching the switching valve of the hydraulic pipe connecting the raising and lowering means and the oil pump, and the raising and lowering means is operated in response to the supply of the hydraulic oil.
Therefore, when replacing the battery, the oil pump for the cargo handling device can be used as a drive source for the lifting / lowering means, and there is no need to provide a separate drive source for the lifting / lowering means. The means can be activated.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a battery-powered industrial vehicle according to an embodiment of the present invention will be described with reference to FIGS.
In this embodiment, a battery-type counter-type forklift 10 (hereinafter simply referred to as “forklift 10”) as a battery-type industrial vehicle is illustrated.
First, the battery 11 according to this embodiment will be described. The battery 11 here is not shown in detail, but a battery cell is mounted on a box-shaped battery case and a plug is provided. .
[0014]
Next, the forklift 10 will be described. As shown in FIGS. 1 and 2, an opening 13 is provided on the side of the vehicle body 12, and the battery housing chamber 14 is provided in the vehicle body 12 through the opening 13. Is formed.
The opening 13 has an opening area that allows the battery 11 to pass therethrough, and a space in which the battery 11 can be stored is secured in the battery storage chamber 14.
Further, a plate-shaped battery stopper 15 is provided in front of the opening 13 in the vehicle body 12 so as to face the opening 13.
The battery stopper 15 is for preventing the battery 11 from jumping out of the opening 13. The battery stopper 15 faces the opening 13 during traveling, but the battery stopper 15 is not used when replacing the battery. The battery 11 can be retreated from the opening 13 so as not to obstruct the movement of the battery 11.
The upper part of the battery storage chamber 13 is covered with an openable battery hood 16 provided with a driving seat 17.
The rear portion of the vehicle body 12 is provided with a counterweight 18 and a rear wheel 19.
Although not shown, the front portion of the vehicle body 12 is provided with a front wheel and an attachment as a cargo handling device.
[0015]
On the other hand, a flat floor portion 20 is formed in the battery housing chamber 14 of the vehicle body 12, and the floor portion 20 is designed to support the bottom surface of the battery 11.
As shown in FIG. 2, slit-like through grooves 21, 21 are arranged on the floor 20 in the front-rear direction so as to be parallel to each other.
In these through-grooves 21, roller holders 22 that support the support rollers 23 are respectively installed so as to be horizontal, and a plurality of support rollers 23 are held freely on each roller holder 22. Has been.
These support rollers 23 not only support the battery 11 in the battery housing chamber 14 when the battery is replaced, but also facilitate the movement of the battery 11, and the rotation direction of the support roller 23 is indicated by an arrow in FIG. This corresponds to the moving direction of the battery 11 indicated by M.
In this embodiment, the roller holder 22 is lifted and lowered by a lifting means described later, and the support roller 23 protrudes or is buried in the through groove 21 by raising and lowering the roller holder 22. In other words, it can be said that the support roller 23 can freely move in and out of the floor portion 20.
[0016]
Next, the raising / lowering means of the roller holder 22 will be described in detail.
As shown in FIGS. 3 and 4, the lifting means for the roller holder 22 in this embodiment mainly includes a bell crank 24, a swing rod 25, and a hydraulic cylinder 26.
The bell crank 24 moves the roller holder 22 up and down in response to the operation of the hydraulic cylinder 26, and the swing rod 25 supports the roller holder 22 with the bell crank 24 in a horizontal state. The cylinder 26 is for raising and lowering the roller holder 22.
The bell crank 24 of this embodiment is provided between the roller holder 22 and the hydraulic cylinder 26, and has a substantially L-shaped form.
The center of the bell crank 24 is provided with a pivotable fulcrum shaft 24a, and has an upper arm portion 24b and a lower collar portion 24c with the fulcrum shaft 24a as a boundary.
The vicinity of the upper end of the upper arm portion 24 b is pivotally attached to the support roller 23 on the back side of the roller holder 22, while the vicinity of the lower end of the lower flange portion 24 c is pivotally attached to the rod 26 a of the hydraulic cylinder 26.
A fulcrum shaft 24a of the bell crank 24 is pivotally supported by the vehicle body 12 (not shown), and the bell crank 24 can be turned up and down with the fulcrum shaft 24a as a fulcrum.
Accordingly, when the rod 26a of the hydraulic cylinder 26 expands and contracts, the bell crank 24 rotates, and the roller holder 22 is raised and lowered according to the expansion and contraction of the rod 26a.
[0017]
The swing rod 23 is for supporting the roller holder 22 together with the bell crank 24 in a horizontal state.
Accordingly, the upper end of the swing rod 25 is pivotally attached to the support roller 23 on the opening 13 side of the roller holder 22, and the lower end of the swing rod 25 is a fulcrum shaft 25 a that is pivotally supported by the vehicle body 12. It is attached to the shaft.
The fulcrum shaft 25a of the swing rod 25 and the fulcrum shaft 24a of the bell crank 24 described above are at the same height, and the upper arm portion 24b of the bell crank 24 and the swing rod 25 are parallel to each other. Therefore, the roller holder 22, the upper arm portion 24b of the bell crank 24, and the swing rod 25 constitute a parallel link.
For this reason, the bell crank 24 is rotated about the fulcrum shaft 24a by the expansion and contraction of the rod 26a of the hydraulic cylinder 26, and the roller holder 22 is moved up and down in a horizontal state.
[0018]
Next, the hydraulic piping 27, the oil pump 28, and the switching valve 29 connected to the hydraulic cylinder 26 will be described.
In this embodiment, an oil pump 28 is employed as a drive source for the raising / lowering means of the roller holder 22, and a hydraulic pipe 27 for sending hydraulic oil supplied from the oil pump 28 to the hydraulic cylinder 26 is provided. .
The oil pump 28 of this embodiment is used for a cargo handling device of the forklift 10, but supplies hydraulic oil to the hydraulic cylinder 26 when the battery is replaced, thereby moving the roller holder 22 up and down.
[0019]
As shown in FIG. 3, the hydraulic pipe 27 includes a pipe line 27 a that connects the oil pump 28 and the switching valve 29, a pipe line 27 b that connects the hydraulic cylinder 26 and the switching valve 29, the switching valve 29, and the oil tank 30. A pipe line 27c to be connected and a pipe line 27d to connect the oil tank 30 and the oil pump 28 are provided.
In this embodiment, although not shown, a conduit for connecting the load handling device including a lift cylinder or a tilt cylinder and the switching valve 29 is separately provided.
Here, the switching valve 29 will be described. The switching valve 29 communicates hydraulic oil supplied from the oil pump 28 between the pipe lines according to the supply destination.
Although the switching valve 29 of this embodiment is not illustrated, the original purpose is to supply hydraulic oil to a lift cylinder and a tilt cylinder that constitute a part of the cargo handling device. In addition to supply, hydraulic oil can be supplied to the hydraulic cylinder 26.
Therefore, the switching valve 29 includes a plurality of spools for the cargo handling device and a spool for the hydraulic cylinder 26, and the switching valve 29 can be said to be a triple type.
Accordingly, the hydraulic oil in the hydraulic cylinder 26 is supplied from the oil pump 28 by switching the switching valve 29 provided in the hydraulic pipe 27.
In addition, when the rod 26a of the hydraulic cylinder 26 is extended, the switching valve 29 can hold the position of the extended rod 26a by maintaining the pressure of the hydraulic oil.
[0020]
Next, battery replacement in the forklift 10 of this embodiment will be described.
First, the case where the battery 11 in the battery storage chamber 14 is taken out will be described. In the forklift 10 in a travelable state, the rod 26a of the hydraulic cylinder 26 is contracted, so that as shown in FIG. The body 22 is in the lowered position.
Therefore, the support roller 23 is buried from the floor 20 through the through groove 21, and the bottom surface of the battery 11 is supported by the floor 20.
[0021]
First, the battery hood 16 is opened in advance and the state is maintained.
Next, the switching valve 29 in the hydraulic pipe 27 is operated so that the pipe line 27a and the pipe line 27b are communicated.
Then, the oil pump 28 is operated to supply hydraulic oil to the hydraulic cylinder 26 through the switching valve 29.
In the hydraulic cylinder 26, the rod 26a of the hydraulic cylinder 26 is raised by receiving the supply of hydraulic oil.
As the rod 26a of the hydraulic cylinder 26 rises, the bell crank 24 rotates (counterclockwise in FIGS. 3 and 4) about the fulcrum shaft 24a, and the roller holder 22 rotates between the bell crank 24 and the swing rod 25. Raised with movement.
For this reason, the support roller 23 protrudes from the floor portion 20 through the through groove 21 due to the rise of the roller holder 22 and comes into contact with the bottom surface of the battery 11.
When the roller holder 22 is further raised, the battery 11 is separated from the floor 20 and supported by the support roller 23 as shown in FIG.
[0022]
When the rod 26a of the hydraulic cylinder 26 is extended to the maximum, the switching valve 29 is operated so that the pressure of the hydraulic oil in the hydraulic cylinder 26 is maintained.
Next, the oil pump 28 is stopped and the battery stopper 15 facing the opening 13 is retracted from the opening 13.
Then, the plug of the battery 11 is disconnected from the vehicle body 12 and the battery 11 is pulled out toward the opening 13.
At this time, the force required to pull out the battery 11 by the rolling of the support roller 23 is only a slight force.
The slight force mentioned here refers to a force that is about human power, and is a slight force compared to the force necessary to move the battery 11 supported by the floor portion 20.
If the battery replacement cart or the like faces the opening 13 of the vehicle body 12, the taken-out battery 11 can be easily handled.
[0023]
Next, a case where another charged battery 11 is accommodated in the battery accommodating chamber 14 will be described.
The forklift 10 is in a state in which the roller holder 22 is raised by the removal of the battery 11 and the support roller 23 protrudes from the floor 20, so that the battery 11 to be stored is directed from the opening 13 to the battery storage chamber 14. To move.
At this time, since the battery 11 moves on the support roller 23, a relatively small force is sufficient for pushing the battery 11.
When the battery 11 is accommodated in the battery accommodating chamber 14, the battery 11 is supported by the support roller 23.
[0024]
At this time, the plug of the battery 11 is connected to the vehicle body 12 so that the switching valve 29 can be operated. When the switching valve 29 is operated so that the rod 26a of the hydraulic cylinder 26 is gradually lowered, the rod Since the bell crank 24 is rotated by the lowering of 26a, the roller holder 22 is lowered together with the swing rod 25.
As the roller holder 22 descends, the support roller 23 that supports the battery 11 is buried from the floor portion 20 through the through groove 21, so that the bottom surface of the battery 11 and the floor portion 20 abut.
When the roller holder 22 is lowered to the maximum, as shown in FIG. 3, when the battery stopper 15 retracted from the opening 13 is brought into the opening 13 and the battery hood 16 is closed, the forklift is lifted at this point. 10 becomes a state which can drive | work.
[0025]
Here, a case where the traveling forklift 10 changes its direction, such as turning or turning, will be described.
When the traveling forklift 10 changes direction, the battery 11 receives inertial force and tries to move in the width direction of the vehicle body 12. However, since the battery 11 is supported by the floor 20 of the battery housing chamber 14, the support roller 23. A much larger frictional force is generated as compared with the case where it is supported by.
For this reason, the battery 11 does not move in the width direction of the vehicle body 12 in the battery housing chamber 14.
[0026]
As described above, in the forklift 10 of this embodiment, the battery 11 in the battery housing chamber 14 is supported by the floor 20 of the battery housing chamber 14 during traveling, and the width direction of the battery 11 due to the direction change of the vehicle body 12 during traveling. Is prevented by the frictional force with the floor portion 20.
In addition, when the battery is replaced, the battery 11 is supported by the support roller 23 to facilitate the movement of the battery 11.
[0027]
The connection mechanism 10 according to this embodiment has the following effects.
(1) Since the movement of the battery 11 in the width direction due to the direction change of the vehicle body 12 during traveling is prevented by frictional force with the floor portion 20, the battery 11 collides with each part of the vehicle body 12 during vibration and vibrates. And no noise is generated.
(2) Since the battery 11 is supported by the support roller 23 at the time of battery replacement, the force required for the movement of the battery 11 is only a slight force, and the battery 11 can be easily moved as in the conventional case.
(3) Since the battery 11 does not collide with each part of the vehicle body 12 during traveling, the strength of the battery stopper 15 and the periphery of the battery stopper 15 can be suppressed more than before, and the cost of the battery stopper 15 and the like can be reduced. Can do.
(4) Since the battery 11 does not collide with each part of the vehicle body 12 during traveling, it is necessary in the prior art to fill the gap between the battery 11 and the vehicle body 12 so as to reduce the amount of movement of the battery 11 in the width direction. There is no need to apply the ingenuity.
(5) Since the oil pump 28, the hydraulic piping 27, and the switching valve 29 necessary for the cargo handling device are already provided, a hydraulic cylinder 26, a part of the hydraulic piping 27b, a bell crank 24 and a swing rod 25 are added. Only by doing this, the lifting means can be realized at low cost.
(6) Since the support roller 23 is supported by the battery holder 22, the support roller 23 can be made to appear and disappear together with the floor portion 20 in accordance with the operation of the hydraulic cylinder 26. Therefore, when the battery 11 is supported by the support roller 23, the load of the battery 11 can be distributed almost evenly with respect to each support roller 23.
[0028]
The present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the gist of the invention. For example, the following modifications may be made.
In the above embodiment, the opening is provided on the side of the vehicle body, but the portion where the opening is provided is not limited to the side of the vehicle, for example, the opening may be provided on the rear of the vehicle, It is sufficient that the opening is at least capable of moving the battery by drawing or pushing it in the horizontal direction with respect to the battery housing chamber.
In the above embodiment, a bell crank, a swing rod, and a hydraulic cylinder are used as the lifting means for the roller holder. For example, the rod of the hydraulic cylinder is attached to the roller holder and only the hydraulic cylinder is used as the lifting means. The elevating means is not particularly limited as long as it can move the roller holder up and down and is operated using an oil pump as a drive source.
○ In the above embodiment, the switching valve can supply hydraulic oil to the hydraulic cylinder or the cargo handling device, and the switching valve for the cargo handling device and the switching valve dedicated to the hydraulic cylinder are provided separately. Even in this case, the hydraulic oil is supplied to the hydraulic cylinder by the oil pump for the cargo handling device.
In the above embodiment, the floor portion of the battery storage chamber is a flat surface, but the floor portion is not limited to a flat surface, and any form can be used as long as the floor portion can support the bottom surface of the battery. It doesn't matter. In addition, it is preferable that the frictional force by contact | abutting with the bottom face and floor part of a battery becomes large, for example, you may provide a slip prevention means which raises frictional forces, such as an elastic material, in a floor part.
○ In the above embodiment, the battery stopper that faces the opening is not intended to be limited to the battery stopper of the above embodiment, but if it is a battery stopper that functions as a battery stopper, its type and location Is free.
In the above embodiment, the counter-type forklift is exemplified as the industrial vehicle. However, the industrial vehicle is equipped with a battery, and the battery can be replaced by moving the mounted battery in the horizontal direction. For example, the present invention can be applied to an automatic guided vehicle.
[0029]
【The invention's effect】
As described above in detail, according to the present invention, the battery can be prevented from moving in the battery chamber when the vehicle is running, and the battery can be easily moved when the battery is replaced. In addition, it is possible to provide a battery-powered industrial vehicle that can reduce the strength of the battery stopper.
[Brief description of the drawings]
FIG. 1 is a side view showing a main part of a forklift according to an embodiment.
FIG. 2 is a plan view showing a main part of the forklift according to the embodiment.
FIG. 3 is an arrow view taken along line AA in FIG. 1;
FIG. 4 is an arrow view taken along line AA showing a state in which a battery is supported by a support roller.
FIG. 5 is a side view showing an outline of a conventional forklift.
FIG. 6 is a plan view showing a main part of a conventional battery housing chamber.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Forklift 11 Battery 12 Car body 14 Battery storage chamber 15 Battery stopper 20 Floor part 22 Roller holding body 23 Support roller 26 Hydraulic cylinder 28 Oil pump 29 Switching valve

Claims (3)

A battery housing chamber capable of housing a battery from the opening of the vehicle body is provided in the vehicle body, a floor portion capable of supporting the bottom surface of the battery is provided in the battery housing chamber, and a plurality of support rollers for supporting the bottom surface of the battery are provided. A battery-powered industrial vehicle, characterized in that the battery-powered industrial vehicle is provided so as to freely move in and out of the floor of the battery storage chamber. 2. The battery-type industrial vehicle according to claim 1, further comprising: a roller holder that supports a plurality of support rollers; and a lifting unit that lifts and lowers the roller holder. The drive source of the lifting / lowering means is an oil pump for the cargo handling device, and the hydraulic piping for connecting the lifting / lowering means and the oil pump is provided, and the hydraulic piping is provided with a switching valve. The battery-operated industrial vehicle according to claim 2, wherein hydraulic oil is supplied to the vehicle.

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