JP4622122B2 - Battery-powered industrial vehicle frame structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a frame structure for a battery-type industrial vehicle.
[0002]
[Prior art]
As shown in FIG. 7, a frame structure of a battery-type forklift with improved frame strength is disclosed in Japanese Patent Laid-Open No. 5-254460. The front cross plate 52 and the rear cross plate 53 erected on the front and rear sides of the lower frame 51 are respectively a plate-like upper cross member 54 and a lower cross having a substantially L-shaped cross section on both side surfaces of the lower frame 51. The members 55 are connected. The upper cross member 54 is fixed by lap welding, and the lower cross member 55 is fixed by a T-shaped joint, a flange joint, or the like. A battery chamber 56 that houses a battery (not shown) is formed in a space surrounded by the upper cross member 54, the lower cross member 55, the front cross plate 52, and the rear cross plate 53.
[0003]
In the forklift having such a frame structure, since the stress on each welded portion is prevented by the two left and right upper cross members 54, the strength of the frame is ensured. In this forklift, when replacing the battery, the battery is lifted from the battery chamber 56 and replaced. However, since the method of lifting and replacing the battery is poor in workability, when the battery is pulled out from the battery chamber 56 in the horizontal direction to obtain a replaceable frame structure, it is necessary to remove either the left or right upper cross member 54. There is.
[0004]
However, when one side of the upper cross member 54 is removed, compared with the case where the upper cross member 54 is provided on both sides, a high stress is applied to the welded portion of the upper cross member 54 and the lower cross member 55, and the life of the frame is increased. The problem of shortening arises. Further, it is possible to adopt a structure in which the battery can be pulled out in the horizontal direction and replaced while the upper cross members 54 on both the left and right sides remain. However, in this case, the upper cross member 54 must be disposed further upward. As a result, the position of the battery chamber 56 is increased, and the drive position (sitting position) is increased at the same time. In addition, the height of the head guard (not shown) of the forklift is increased, which causes a problem that the indoor work is hindered.
[0005]
Therefore, conventionally, as shown in FIGS. 8 and 9, it has been unavoidable to manufacture the vehicle body as a dedicated vehicle corresponding to the way the battery is mounted and taken out. That is, in the thing shown in FIG. 8, there is no opening part in the side surface of the vehicle body 57, and when the hood 59 attached with the driver's seat 58 is flipped up, an opening part is formed upward, and from there, The battery 60 is lifted using a crane or the like to be taken out and mounted. Further, in the case shown in FIG. 9, an open portion is provided only on the side surface of the vehicle body 61, and the battery 62 is pulled out from there in the horizontal direction, and no open portion upward is formed. Is.
[0006]
[Problems to be solved by the invention]
Since the situation is as described above, when the user tries to change the equipment from the lifting type to the horizontal drawer type in order to improve the exchangeability of the battery according to the usage situation (the same applies to the reverse change) ), I had to replace the forklift I had used up to now. The manufacturer also had to produce two types of forklifts, a lifting type and a horizontal drawer type. Therefore, an excessively large burden is imposed on both the user and the manufacturer.
[0007]
The present invention has been made in view of the above-described problems, and the object thereof is to provide a lifting type and a horizontal type only by preparing one kind of forklift (industrial vehicle) regardless of how the battery is mounted and taken out. It is an object of the present invention to provide a frame structure for a battery-powered industrial vehicle that can immediately cope with both of the drawer types.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, the vehicle body is provided with a battery storage chamber and is driven by an electric motor, and the battery storage chamber is at least one of the vehicle bodies. The side surface and the upper surface side are continuously opened, and a reinforcing plate is detachably attached at the intersection of the side surface and the upper surface of the battery storage chamber, and the reinforcing plate is parallel to the direction of mounting and removing the battery. It can be attached as appropriate in the posture.
[0009]
According to the present invention, by simply changing the mounting position of the reinforcing plate by 90 °, the opening direction of the battery storage chamber can be immediately adapted to match the predetermined direction of mounting and removing the battery. As a result, there is no need to separately prepare two types of vehicle bodies of a lifting type and a horizontal drawer type. Also, the user can divert an existing industrial vehicle as it is when the battery mounting and taking-out method is changed to another method.
[0010]
According to a second aspect of the present invention, in the first aspect of the present invention, the reinforcing plate includes a body portion having the same length as the front and rear width of the battery storage chamber, and a pair of bent at right angles from both end portions. It is composed of mounting legs.
[0011]
According to the present invention, the vehicle body can be fixed integrally with the reinforcing plate while maintaining the front-rear width of the battery storage chamber in accordance with the prescribed dimensions, so that the dimensional accuracy and strength as an industrial vehicle are highly reliable. It can be.
[0012]
According to a third aspect of the present invention, in the second aspect of the present invention, an appropriate number of reinforcing ribs extending in the longitudinal direction are provided on the main body portion of the reinforcing plate.
[0013]
According to the present invention, since the rigidity of the reinforcing plate main body can be increased, it is useful for ensuring the strength of the vehicle body, and the reinforcing plate can be thinned, which can contribute to a reduction in vehicle weight.
[0014]
According to a fourth aspect of the present invention, in the invention according to the second or third aspect, the reinforcing plate is attached to the vehicle body by at least two bolts on one side, and the bolt holes are arranged in the reinforcing plate. It is made into the square shape which has one side parallel to the plane part of a main-body part.
[0015]
According to the present invention, the screw hole for the bolt or the bolt hole can be used in common at any position in the appropriate posture obtained by changing the posture of the reinforcing plate attached to the vehicle body by 90 °. The structure for mounting the plate is simplified.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
(First embodiment)
1 and 2, a vehicle body 1 of an industrial vehicle (forklift in this embodiment) is supported by wheels 2 so as to be able to travel, and incorporates an electric motor (not shown) as a drive source. A mast 3 is erected on the front portion of the vehicle body 1, and a carriage 5 for mooring a fork 4 is guided by the mast 3 so as to be movable up and down. A head guard 6 for protecting the driver from falling luggage is disposed above the vehicle body 1. Further, a battery storage chamber 7 for storing the battery 20 is formed near the rear of the vehicle body central portion. In the illustrated embodiment, the battery storage chamber 7 is continuously opened on the right side (the left side or both sides) and the upper side, and the other side is closed. It is said to be a wall surface. And in this open part, the reinforcement plate 10 is attached to the crossing position (A part shown in FIG. 1) of the said right side surface and an upper surface so that attachment or detachment is possible.
[0018]
The reinforcing plate 10 will be further described in detail with reference to FIGS. The reinforcing plate 10 includes a main body portion 11 and a pair of mounting leg portions 12 bent at right angles in the same direction from both end portions thereof. The length L 1 of the main body 11 is equal to the distance L 2 between the front cross plate 13 and the rear cross plate 14 that form the front and rear side surfaces of the battery storage chamber 7. In addition, four bolt holes 17 (see also FIG. 5 and FIG. 6) are formed in the mounting leg portion 12 at the respective vertex positions of the square, and the corresponding positions of the front cross plate 13 and the rear cross plate 14 respectively. The reinforcing plate 10 is firmly coupled to both the front cross plate 13 and the rear cross plate 14 of the vehicle body 1 by bolts 15 and nuts 16 penetrating through the bolt holes formed in the vehicle body 1. At this time, one side of the square indicating the arrangement of the bolt holes drilled in the mounting leg portion 12 of the reinforcing plate 10 is made parallel to the flat surface of the main body portion 11 of the reinforcing plate 10 and the front cross One side of the square indicating the arrangement of the bolt holes drilled in each of the plate 13 and the rear cross plate 14 is set to be parallel to the upper surface of the battery storage chamber 7. In the illustrated embodiment, four bolts are inserted into the four bolt holes, but at least two or more of these four bolt holes are selected, and two or more correspondingly. You may make it tighten with a volt | bolt.
[0019]
The operation of the first embodiment configured as described above will be described. FIG. 1 and FIG. 3 show a mode corresponding to a case where the mounting and taking-out direction of the battery 20 is the vertical direction, that is, a case where the battery replacement is a lifting type. In this case, the plane of the main body 11 of the reinforcing plate 10 is set so as to be parallel to the vertical direction, and a sufficient open space is formed on the upper surface of the battery storage chamber 7. When replacing the battery in this embodiment, first, the hood 22 with the driver's seat 21 attached is flipped up to open the upper surface of the battery storage chamber 7. Subsequently, when the crane is lowered and the hook 24 at the tip of the rope 23 is moored and pulled up at a predetermined position of the battery 20, the battery 20 rises in the battery storage chamber 7 and is pulled out above the upper surface (FIG. 1). As shown in the figure). Thereafter, the crane is moved sideways to remove it from the vehicle body 1, and the battery 20 is moved to a desired position and lowered. Then, the hook 24 is moored and lifted to a new battery 20 prepared separately, and the new battery 20 can be mounted at a predetermined position of the vehicle body 1 by the reverse operation to that described above.
[0020]
Next, in the case where it is necessary to correspond to a case where the battery 20 is mounted and taken out in the horizontal direction, that is, the battery replacement is a horizontal drawer type, the bolt 15 and the nut 16 are removed, and the reinforcing plate is removed. 2 and 4 is turned 90 °, and the bolts 15 and nuts 16 are used again to fix the reinforcing plate 10 to the front cross plate 13 and the rear cross plate 14 of the vehicle body 1. . In this state, the plane of the main body portion 11 of the reinforcing plate 10 is parallel to the horizontal pull-out direction of the battery 20, and a sufficient open space is formed on the right side surface of the battery storage chamber 7. When replacing the battery, after releasing a battery fixing device (not shown), the battery 20 is pulled out in the lateral direction as shown in FIG. At this time, a roller conveyor or the like (not shown) having substantially the same height as the bottom surface of the battery storage chamber 7 is arranged, pulled out and placed thereon, and transferred by a crane or the like. Subsequently, a new battery 20 prepared separately is placed on the roller conveyor or the like, and the battery 20 is moved laterally from there and sent into the battery storage chamber 7. Thereafter, it is confirmed that the battery 20 is stored in a predetermined position in the battery storage chamber 7, and the battery 20 is fixed by the fixing device. Thus, a series of battery replacement operations are completed.
[0021]
The effects expected from the first embodiment will be described below.
(A) Regardless of whether the battery is replaced by the lifting type or the horizontal drawer type, it can be easily handled by changing the mounting posture of the reinforcing plate 10, so that the manufacturer only needs to produce one type. Thereafter, a desired battery replacement method can be appropriately handled by a store or a user. Therefore, the manufacturer has a merit that it can greatly contribute to cost reduction and that the user can divert the existing vehicle as it is even if the battery replacement method is changed.
(B) Since the bolt 15 and the nut 16 are arranged at the square apex position, the common bolt hole 17 can always be used even if the reinforcing plate 10 is turned 90 °. The structure is simplified and the reliability in strength is improved.
(C) Since the reinforcing plate 10 has a flat plate shape, the size in the height direction and the size in the horizontal direction of the battery storage chamber 7 are not increased at all, and therefore the vehicle body 1 is increased in size. There is no.
[0022]
(Second Embodiment)
Of the first embodiment, another embodiment related to the reinforcing plate will be described with reference to FIGS. 5 and 6. In this embodiment, reinforcing ribs 18 are formed on the main body portion 11a of the reinforcing plate 10a in parallel with the longitudinal direction thereof. In this embodiment, the number of reinforcing ribs 18 is one, but a plurality of ribs 18 may be provided. The reinforcing ribs 18 are preferably formed by press molding. However, the reinforcing ribs 18 may be formed by welding the protrusions to make them thick.
[0023]
In the reinforcing plate 10a configured as described above, the strength against the compressive force in the longitudinal direction applied to the main body 11a is improved.
[0024]
According to the second embodiment, in addition to the effects obtained in the first embodiment, the following effects can be further enjoyed.
(D) Since the strength of the reinforcing plate 10a is improved by the reinforcing ribs 18, the reliability of the strength of the entire vehicle body 1 is improved.
(E) Further, for the purpose of improving the strength, the thickness of the reinforcing plate 10a itself can be reduced, thereby making it possible to reduce the weight of the vehicle body and securing the necessary internal volume of the battery storage chamber 7. , Can contribute to miniaturization of the physique.
[0025]
The present invention is not limited to the embodiment described above, and can be implemented as follows.
In the above embodiment, a forklift has been described as an example of an industrial vehicle. However, the present invention is not limited to this, and the present invention is generally applied to industrial vehicles such as automatic guided vehicles, towing vehicles, and sweepers. Is possible.
○ The width of the main body portion of the reinforcing plate is only a size that covers only the upper edge portion of the battery side surface or only the edge portion of the upper surface of the battery in the drawings used in the description of the above embodiment. The present invention can also be implemented by enlarging the width to cover most of the battery side surface or the upper surface of the battery.
In the above embodiment, the reinforcement plate is firmly attached to the vehicle body by bolts and nuts. However, for example, a simple type such as a plug-in type may be used.
○ In the above embodiment, the reinforcement plate is attached to the vehicle body with bolts and nuts, and bolt holes are drilled in the attachment legs of the front cross plate, rear cross plate, and reinforcement plate of the vehicle body. It is also possible to use only bolts, drill holes in the mounting plate's mounting leg, and screw holes in the front cross plate and rear cross plate of the vehicle body (conversely, Bolt holes may be drilled in the front cross plate and rear cross plate, and screw holes may be provided in the mounting leg portions of the reinforcing plate).
○ In the above embodiment, four bolt holes are drilled in the mounting legs of the front cross plate, rear cross plate, and reinforcing plate of the vehicle body, but this is not a limitation, and any one of them is omitted. Even implementation is possible.
[0026]
【The invention's effect】
As described above, according to the present invention, it is possible to immediately respond to the change of the battery replacement method simply by changing the posture of the reinforcing plate, so that the manufacturer can greatly contribute to the cost reduction, and for the user, Even if the battery replacement method is changed, it is possible to enjoy the merit that an existing vehicle can be used as it is, and since the strength of the vehicle body can be improved, there are various remarkable effects that the life of the vehicle can be extended. ing.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a forklift according to the present invention. FIG. 2 is a perspective view showing a forklift according to another embodiment of the present invention. FIG. 3 is a perspective view showing a main part of the invention. FIG. 5 is a perspective view showing a main part of another aspect of the present invention. FIG. 5 is a perspective view showing a second embodiment of the present invention. FIG. 6 is a cross-sectional view taken along line BB in FIG. FIG. 8 is a perspective view showing a forklift according to the prior art. FIG. 9 is a perspective view showing a forklift according to another aspect of the prior art.
DESCRIPTION OF SYMBOLS 1 Car body 7 Battery storage chamber 10 Reinforcement plate 11 Main-body part 12 Attachment leg part 13 Front cross plate 14 Rear cross plate 18 Rib 20 Battery

Claims (4)

The vehicle body is an industrial vehicle provided with a battery storage chamber and driven by an electric motor, wherein the battery storage chamber is continuously opened on at least one side surface and upper surface side of the vehicle body, A frame of a battery-type industrial vehicle characterized in that a reinforcing plate is detachably attached at the intersection of the side surface and the upper surface, and the reinforcing plate can be appropriately attached in a posture parallel to the direction of mounting and taking out the battery Construction. The said reinforcing plate is comprised from the main-body part of the same dimension length as the front-back width of the said battery storage chamber, and a pair of attachment leg part bent at right angles from the both ends. The frame structure of a battery-powered industrial vehicle. The frame structure for a battery-type industrial vehicle according to claim 2, wherein an appropriate number of reinforcing ribs extending in the longitudinal direction are provided on the main body portion of the reinforcing plate. The reinforcing plate is attached to the vehicle body by at least two bolts on one side, and the bolt hole is arranged in a square shape having one side parallel to the flat portion of the reinforcing plate main body. The frame structure of the battery-powered industrial vehicle according to claim 2 or 3.

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