JP2003128378A - Hoisting accessory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hoisting accessory of simple structure, allowing easy attachment and detachment of a battery to and from a vehicle without remodeling a battery, a battery case and a car body in replacing the battery of an electric forklift. SOLUTION: This hoisting accessory 10 is adapted to hoist the battery 1 by using a hole provided in the side of the battery case 2. The hoisting accessory is formed by a hoisting member 11 to which external force for hoisting the battery 1 is applied, a shaft member 15 connected to the hoisting member 11 and extended vertically to the hoisting direction, and at least two fixing members 22 having a shaft passing part for passing the shaft member 15, and a fixed part connected to the shaft passing part and fixed to the hoisting hole 4 of the battery case 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanger for facilitating replacement work of a battery used in a forklift.

[0002]

2. Description of the Related Art Generally, when the battery of an electric forklift is consumed by traveling or loading and unloading,
The battery of the electric forklift truck needs to be charged for use in cargo handling work. However, charging a battery having a relatively large capacity such as that used in an electric forklift truck requires a certain amount of charging time, so the vehicle must be stopped during charging.

Therefore, in order to increase the working density of the electric forklift truck and to continuously perform traveling and cargo handling work, it is necessary to minimize the dead time due to the stop of the vehicle during charging. Therefore, a method is generally used in which two or more sets of batteries are prepared and the exhausted battery is replaced with a charged battery to continuously operate the electric forklift.

[0004]

Since a battery having a relatively large capacity used in an electric forklift truck has a large weight, it is almost impossible to handle it manually, and there is a danger in a work such as replacement. Therefore, there are various methods for exchanging a consumed battery with a fully charged battery. One of them is a method using a crane device.
In this method, a hook is attached to a hoisting hole provided in advance in a battery case accommodating a battery, and the other end of a wire rope or a chain connected to the hook is hooked on a hook of a crane device to make a crane device. Is a method of hoisting the battery from the vehicle.

However, in such a work using the crane device, replacement work can be performed only at a place where the crane device is present, and wire rope hanging work and chain hanging work for operating the crane device and hoisting the battery with the crane device are performed. There was a problem that I needed a professional qualification.

As another method of battery replacement, the side surface of the vehicle body of the electric forklift truck can be largely opened, and a dedicated battery exchange cart is arranged on the side surface of this opening portion so that the exhausted battery can be removed from the vehicle side. There is a method in which the battery is pulled out and transferred to a battery exchange cart to exchange it with a charged battery.

However, in this case, if the side surface of the vehicle body is simply opened wide, the strength of the vehicle body is lowered, and therefore the vehicle body must be reinforced in order to prevent this. Also, in order to be able to pull out the battery from the vehicle, a mechanism for supporting the bottom surface of the battery case with a plurality of rollers is required, and further parts for the mechanism are required, resulting in an increase in the number of parts as a whole and cost reduction. There is a problem of being up.

Yet another method of battery replacement is to use another forklift to lift a depleted battery from the vehicle, remove it, and replace it with a fully charged battery. However, in this case, it is necessary to provide a bracket having an insertion port for inserting a fork of another forklift in the upper part of the battery case, or to provide a fork insertion hole in the lower part of the battery case.

However, since the battery of the electric forklift truck is usually arranged under the seat of the driver's seat, a bracket having a fork insertion slot for another forklift truck is provided at the upper part of the battery case. Then, the bracket portion sticks out to the driver's side, which interferes with getting on and off the forklift. Further, in order to provide a hole for inserting the fork in the lower part of the battery case, the position of the entire battery must be arranged above by the amount of the hole for inserting the battery, so that the driver's seat position also moves upward. There are many changes such as moving and increasing the overall height of the car body.

In order to solve this problem, Japanese Patent Laid-Open No. 11-
Japanese Patent No. 228086 proposes a configuration in which a bracket having a fork insertion port can be retracted from the upper surface of the battery case. However, in this case, since such a bracket is attached to the battery case, the battery case itself is attached. There was a problem that modification or addition of parts was necessary.

Therefore, an object of the present invention is to hang the battery of an electric forklift truck with a simple structure so that the battery can be easily attached to and detached from the vehicle without any modification to the battery, the battery case and the vehicle body side. To provide.

[0012]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, the present invention provides a lifting tool for lifting a battery by using at least two holes provided on one side surface of a battery case. Wherein a hanging member to which an external force for hoisting the battery is applied, a shaft member that is connected to the hanging member and extends perpendicularly to the hoisting direction, and a shaft insertion portion that inserts the shaft member, At least two fixing members, which are connected to the shaft insertion portion and have a fixing portion fixed to the hole of the battery case, are provided.

According to the present invention, since the hoisting tool is attached to the hoisting hole provided in the battery case in advance, it is not necessary to modify the battery, the battery case and the vehicle body. Therefore, the hanging tool can be attached to the existing battery as it is, regardless of the type of battery, the difference in battery manufacturer, and the like. Further, in order to fix the suspending tool to the battery case, it is only necessary to fix the fixing member to a lifting hole provided in the battery case in advance with a pin, a nut or the like. Is very easy.

It is preferable that the fixing portion is movable with respect to the shaft member, so that the distance between the fixing members can be changed. Accordingly, the lifting tool can be commonly used for battery cases in which the positions of the lifting holes provided in the battery case in advance are different.

The shaft members may be provided separately for each of the fixing members. According to this structure, good assemblability can be obtained without requiring special dimensional accuracy for the shaft diameter accuracy of the shaft member and the hole diameter accuracy of the fixing member through which the shaft member is inserted. The hanging member may be rotatable around the shaft member. Thus, after mounting the battery to which the suspender is attached in the vehicle, the suspending member can be rotated and stored in the upper portion of the battery case. Therefore, even when the battery is mounted on the vehicle, the suspender is housed between the battery case and the vehicle-side battery cover,
It does not interfere with getting on and off the driver's seat.

It is preferable that the suspension member has a fork insertion port into which a fork of a forklift can be inserted. Then, the fork of another forklift can be inserted into the insertion port to lift the battery.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing an electric forklift equipped with a battery. In the electric forklift 101 of FIG. 1, the battery 1 is arranged inside the vehicle body below the seat 107. Sheet 107
A battery cover 109 is provided between the battery 1 and the battery 1. 103 is a fork, 105 is a mast, and 113 is a cargo handling lever.

The battery 1 comprises a battery case 2 shown in FIG. 2 and a large number of battery cells 3 housed therein. A lifting hole 4 is provided at the upper ends of the two opposite side surfaces 6 of the battery case 2. A battery cover stopper 5 is provided at the upper end of one of the two vertical surfaces adjacent to the two opposite side surfaces 6. The battery cover stopper 5 is the battery cover 10
9 is a mounting portion for fixing the battery 9 to the battery 1.

Next, the structure of the suspender will be described with reference to FIGS. 3 to 6. FIG. 3 is a perspective view showing a state in which the hanger is attached to the battery. FIG. 4 is a view showing the front surface of the suspender. FIG. 5 is a diagram showing a cross section taken along line AA of FIG. FIG. 6 is a diagram showing a BB cross section of FIG. 4.

In FIG. 3, the hanging tool 10 is attached to the battery case 2, and the pin 21, the nut 28 and the washer 31 are attached.
It is fixed to the battery case 2 by. Hanging equipment 1
As shown in FIG. 4, 0 is composed of a hanging member 11, a shaft member 15, a fixing member 22 and the like.

The suspension member 11 comprises a plate portion 12, a bracket 45 and a bracket 47. The plate portion 12 is for applying an external force when the battery 1 is lifted, and is a substantially rectangular flat plate. At the center of the plate portion 12, there is provided a rectangular opening 13 having a size that allows at least one fork of a forklift to be inserted (see FIG. 7). Upper edge of opening 13 (U direction side in FIG. 4)
Two semi-circular cutouts 14 are provided in the. The semicircular notch 14 is for hooking the wire rope when the wire rope is used. The plate portion 12 is
Made from steel plate, etc.

The bracket 45 is a shaft member 1 which will be described later.
5, which is provided to support both ends of the lower end of the plate portion 12 (D direction side in FIG. 4) (F or R direction side in FIG. 4). FIG. 6 shows the shape of the bracket 45 seen from the side, that is, the F or R direction in FIG. A circular hole 45a for inserting the columnar shaft member 15 is formed through substantially the center of the side surface.

The bracket 45 is provided with a cylindrical hole 55. One hole 55 is provided in each of the right (R direction side of FIG. 4) and left (L direction side of FIG. 4) brackets 45 shown in FIG. The hole 55 is, as shown in FIG. 6, a side surface of the bracket 45 (RH side in FIG. 6).
6 is opened in the horizontal direction toward the LH direction in FIG. 6, and extends across the hole 45a through which the shaft member 15 is inserted. In the inner part of the hole 55 (LH direction side in FIG. 6), the shaft pressing ball 4
9, the ball pressing plate 51 and the spring 53 are inserted. The shaft pressing ball 49 is pressed against the shaft member 15 by the urging force of the spring 53. The lower end of the plate portion 12 is fixed to the upper end surface of the bracket 45 (U direction side in FIG. 6) by welding or the like. The bracket 45 is made of, for example, a steel material.

The bracket 47 is the bracket 45 described above.
And for supporting the shaft member 15, as shown in FIG.
As shown in, the plate portion 12 is provided at a substantially lower end of the center thereof. The bracket 47 has the same cross-sectional shape as the bracket 45, and has a hole 4 through which the shaft member 15 is inserted substantially at the center of the side surface.
7a is provided. The lower end of the plate portion 12 is fixed to the upper surface of the bracket 47 by welding or the like. The bracket 47 is made of, for example, a steel material.

The plate portion 12, the bracket 45, and the bracket 47 may be integrally formed instead of being separately formed and welded together as described above. As a result, the number of parts of the hanger 10 can be reduced, and since it is not necessary to perform welding connection, the dimensional accuracy of the hanger 10 can be improved.

The shaft member 15 is for supporting a fixing member 22 which will be described later and is fixed to the battery case 2.
As shown in FIG. 4, the bracket 45, the bracket 47, and the fixing member 22 described later are inserted in the lateral direction (F or R direction in FIG. 4). The shaft member 15 is provided separately for each fixing member 22. That is, as shown in FIG. 4, each shaft member 15 is inserted through the bracket 45 and the fixing member 22 in this order from both end sides (F or R direction side in FIG. 4) of the hanging member 11, and the tip end thereof is the hole 47 a of the bracket 47. Has been inserted into. Again 2
The individual shaft members 15 are mounted in the holes 47a of the bracket 47 so as to be concentric in the axial direction. According to this structure, good assemblability can be obtained without requiring special dimensional accuracy such as accuracy of the shaft diameter of the shaft member 15 and accuracy of the hole diameter of the fixing member 22 through which the shaft member 15 is inserted. Also, the shaft member 1
Reference numeral 5 does not come off from the bracket 45 and the bracket 47.

In this embodiment, the shaft member 15 is provided separately for each of the two fixing members 22, but the two shaft members 1
5 may be connected in the axial direction to form one shaft member. As shown in FIG. 6, the shaft member 15 is provided with a plurality of spherical ball pressing grooves 57 on the same circumference. The ball pressing groove 57 is laterally (F or R direction in FIG. 4) in the bracket 4
It is provided at a position corresponding to the hole 55 provided in No. 5. Therefore, when the bracket 45 rotates around the shaft member 15 and the shaft holding ball 49 in the hole 55 reaches the position of the spherical ball holding groove 57, the above-mentioned shaft holding ball 4 is moved.
9 is pressed against the shaft member 15 by the urging force of the spring 53. As a result, the shaft pressing ball 49 fits in the ball pressing groove 57 and the rotation of the bracket 45 is stopped. In this way, by providing the ball holding groove 57 at a desired position on the same circumference of the shaft member 15, the rotation of the bracket 45 around the shaft member 15 can be stopped at a desired position.

As shown in FIG. 5, a slide positioning hole 33 is provided on the upper surface of the shaft member 15 (on the U direction side in FIG. 5). The slide positioning hole 33 is provided in the shaft member 15.
A circular hole having a depth of 3 to 5 mm opened vertically downward (direction D in FIG. 5) from the upper surface of the same so that its diameter is equal to that of a slide fixing screw 35 provided on a fixing member 22 described later. Has been done. At least one slide positioning hole 33 is provided on the upper surface along the axial direction of the shaft member 15 (F or R direction in FIG. 4). The shaft member 15 is
For example, it is made of steel.

The fixing members 22 are for fixing the suspending tool 10 to the battery case 2, and are provided at both ends of the plate portion 12 (on the F or R direction side in FIG. 4) as shown in FIG. The shaft member 1 is provided at an intermediate portion between the bracket 45 and the bracket 47 provided substantially at the center of the plate portion 12.
It is attached around 5.

When the fixing member 22 is viewed from the side, as shown in FIG. 5, it has a vertically long, substantially rectangular shape. Fixing member 22
The upper half portion is a shaft insertion portion through which the shaft member 15 is inserted, and a circular shaft insertion hole 22a penetrates. Fixed member 2
The lower half part of 2 is a fixed part that is connected to the shaft insertion part of the upper half part and is fixed to the battery case 2. The shaft insertion hole 22a is in a direction substantially perpendicular to the central part (RH or LH direction in FIG. 5). A circular pin insertion hole 22b for inserting a pin 21, which will be described later, is formed therethrough.

The fixing member 22 extends along the shaft member 15 between the bracket 45 and the bracket 47 in the axial direction (F in FIG. 4).
Alternatively, the slide fixing screw hole 37 is provided at the uppermost end of the fixing member 22 for fixing.
Are provided in the vertical direction (U or D direction in FIG. 5). The slide fixing screw hole 37 extends vertically downward from the upper end surface of the fixing member 22 and penetrates to the shaft insertion hole 22a through which the shaft member 15 is inserted. The slide fixing screw 35 is incorporated in the slide fixing screw hole 37.

As described above, the shaft member 15 has a slide positioning hole 33 corresponding to the slide fixing screw hole 37.
Is provided at the uppermost end of the shaft member 15 in the axial direction (F or R direction in FIG. 4). Therefore, when the slide fixing screw hole 37 of the fixing member 22 and the slide positioning hole 33 of the shaft member 15 are aligned in the axial direction (F or R direction in FIG. 4), the slide fixing screw 35 is moved downward from above. When screwed, the fixing member 22 is fixed to the shaft member 15.

As shown in FIG. 5, on the upper surface of the fixing member 22 (U direction side in FIG. 5), the plate portion 12 is prevented from rotating to the outside of the battery case 2 (RH direction in FIG. 5). A vertical stopper 24 is provided. On the side surface (LH direction side in FIG. 5) of the fixing member 22, rotation of the plate portion 12 to the inside of the battery case 2 (LH direction in FIG. 5) is determined by a predetermined angle (in the case of FIG. 5). A horizontal stopper 26 is provided to prevent the temperature from exceeding 90 degrees. The vertical stopper 24 and the horizontal stopper 26 are formed integrally with the fixing member 22 or are separately made in advance, and
It may be joined to each other by welding or the like. The fixing member 22, the vertical stopper 24, and the horizontal stopper 26 are made of, for example, steel material.

The pin 21 is for fixing the fixing portion of the fixing member 22 to the battery case 2. As shown in FIG. 5, the pin 21 is a cylindrical rod member and is provided with a screw thread 23 at its tip. The pin 21 has a pin insertion hole 22b provided in the fixing member 22 and a battery lifting hole 4 provided in advance in the battery case 2 inside the battery case 2 (see FIG. 5).
From the LH direction) to the outer side (RH direction in Fig. 5), and insert the washer 3
After mounting 1, the fixing member 22 is fixed to the battery case 2 using the nut 28 on the screw thread 23. The pin 21 is made of, for example, a steel material.

Next, a method of using the hanger 10 will be described.
First, the fixing member 22 is made so that the pin insertion hole 22b of the fixing member 22 is aligned with the lifting hole 4 of the battery case 2.
Align the position of. Next, as shown in FIG.
Through the pin insertion hole 22b from the inside (LH direction in FIG. 5) of the battery case 2 to the outside (RH direction in FIG. 5), and attach the washer 31 from the outside (RH direction in FIG. 5) of the battery case 2. Then, it is fixed using the nut 28. that time,
If the mounting interval of the fixing member 22 of the hanging device 10 on the shaft member 15, that is, the interval in the axial direction (L1 in FIG. 4) is made the same as the interval of the hoisting holes 4 provided in the battery case 2 in advance, The hanger 10 can be attached to the battery case 2 without performing any processing on the battery case 2. When the intervals of the hoisting holes 4 of the battery case 2 are different, as shown by phantom lines in FIG.
Is moved along the shaft member 15, the fixing members 22 are fixed to the shaft member 15 at different intervals (for example, L2 in FIG. 4) of the hoisting holes 4 of the battery case 2, and the hanger 10 is fixed using the pins 21. It may be fixed to the battery case 2. Then, since the suspending tool 10 is stopped at a desired position, the suspending tool 10 can be commonly used for battery cases having different lifting hole intervals.

In this way, after the battery 1 to which the hanging device 10 is attached is mounted on the vehicle, the plate portion 12 of the hanging member 11 is rotated about 90 degrees until it hits the horizontal stopper 26 shown in FIG. 10 is stored in the upper part of the battery case. Therefore, even when the battery 1 is mounted on the vehicle, the suspending tool 10 is housed between the battery 1 and the battery cover 109 on the vehicle side, so that there is no obstacle to getting on and off the driver's seat.

Further, when the battery 1 is mounted on the forklift 101 with the suspending tool 10 folded as shown in FIG. 8 or 9, the rotating shaft of the shaft member 15 is located above the battery cell 3. Since it is located at
Even when is rotated, a gap is maintained between the hanging member 11 and the upper end of the battery cell 3 and they do not come into contact with each other. Therefore, the battery 1 is not likely to be damaged by the hanging member 11.

To take out the battery 1 from the forklift 101, the seat 107 and the battery cover 109 shown in FIG.
Are raised above the vehicle to create a space in which the battery 1 can be taken out. Next, as shown in FIG. 3, the suspending member 11 of the suspender 10 is placed in a substantially vertical state, and in that state,
In the opening 13 of the plate portion 12 of the hanging member 11 shown in FIG.
As shown in FIG. 7, the fork of another forklift is inserted to lift the battery 1. The battery 1 is mounted on the forklift 101 in the reverse order.

Therefore, the forklift 10 of the battery 1
It can be attached / detached to / from 1 in a very short time and very easily. or,
Battery 1, battery case 2, and forklift 10
No need to modify the car body of 9 at all, crane device,
There is no need for equipment such as a dolly for attaching and detaching.

Further, since the hanging tool 10 does not require any processing on the battery case 2, it can be used for batteries of any size.

[Brief description of drawings]

FIG. 1 is a diagram showing an electric forklift equipped with a battery.

FIG. 2 is a perspective view showing a battery.

FIG. 3 is a perspective view showing a state in which a suspender is attached to the battery.

FIG. 4 is a view showing a front surface of the hanging tool.

5 is a diagram showing a cross section taken along line AA of FIG.

6 is a diagram showing a cross section taken along the line BB of FIG.

FIG. 7 is a perspective view showing a state in which a fork of a forklift is inserted into the hanging tool.

FIG. 8 is a perspective view showing a state in which a suspender attached to a battery is folded.

9 is a diagram showing a side surface of FIG. 8. FIG.

[Explanation of symbols]

1 ... Battery 2 ... Battery case 3 ... Battery cell 4 ... Lifting hole 5: Battery cover stopper 6 ... side 10 ... Hanging equipment 11 ... Hanging member 12 ... Board part 13 ... Opening 14 ... Notch 15 ... Shaft member 21 ... pin 22 ... Fixing member 22a ... Shaft insertion hole 22b ... Pin insertion hole 23 ... screw thread 24 ... Vertical stopper 26 ... Horizontal stopper 28 ... Nut 31 ... washer 33 ... Slide positioning hole 35 ・ ・ ・ Slide fixing screw 37 ・ ・ ・ Slide fixing screw hole 45 ... Bracket 45a ... hole 47 ... Bracket 47a ... hole 49-axis ball 51: Ball holding plate 53 ... Spring 55 ... hole 57 ... Ball holding groove 101 ... Electric forklift 103 ... fork 105 ... mast 107 ... sheet 109 ... Battery cover 113 ... cargo handling lever

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tomohiro Sato             Sumitomo Na, 2-75, Daito-cho, Obu City, Aichi Prefecture             Co-Material Handling Co., Ltd. (72) Inventor Tetsuo Goto             Sumitomo Na, 2-75, Daito-cho, Obu City, Aichi Prefecture             Co-Material Handling Co., Ltd. (72) Inventor Atsushi Nichinan             Sumitomo Na, 2-75, Daito-cho, Obu City, Aichi Prefecture             Co-Material Handling Co., Ltd. F-term (reference) 3D035 BA03                 3F004 EA31 ZZ00                 3F333 AA02 AB13 CA09 DA03 DB05

Claims (5)

[Claims] 1. A suspending tool for suspending a battery by utilizing at least two holes provided on one side surface of a battery case; a suspending member to which an external force for suspending a battery is applied; A shaft member that is connected to the member and extends perpendicularly to the lifting direction; a shaft insertion part that inserts the shaft member; and a fixing part that is connected to the shaft insertion part and is fixed to the hole of the battery case. And at least two fixing members having: 2. The hanger according to claim 1, wherein the fixing portion is movable with respect to the shaft member, and thereby the distance between the fixing members can be changed. 3. The hanger according to claim 2, wherein the shaft member is provided separately for each of the fixing members. 4. The suspender according to claim 1, wherein the suspending member is rotatable around the shaft member. 5. The suspension according to claim 1, wherein the suspension member has a fork insertion port into which a fork of a forklift can be inserted.