JPH09202596A - Electric reach-type fork lift capable of easily taking out battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely take out a battery from a storage chamber with a little force by making a battery holding battery bead of the battery storage chamber inclined and moved between the position in which the outer end is as high as or higher than the inner end and the position in which the outer end is lower than the inner end. SOLUTION: In the early stages, a battery bead 54 is turned clockwise around a hinge pin 62 and held in the first position in which the inner end 60 is lowered by the angle α in relation to the horizontal surface. A battery 14 is moved to a cover 38 side inside a storage chamber 16, and the battery 14 is not moved to a side opening 40 side also in the operation of a fork lift. When the battery 14 is taken out from the storage chamber 16, it is rotated counterclockwise by depressing an arm pedal 88. Therefore, a lift arm 78 is erected perpendicular to the battery bead 54. Simultaneously, a reach cylinder is operated, and the battery bead 54 is positioned in the second position in which the outer end side is lower. The battery 14 is moved to the side opening 40 side and can be easily taken out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reach type forklift designed to move a mast assembly forward and backward with respect to a vehicle body, and more particularly to a battery for easily removing the battery from its storage chamber. The present invention relates to an electric reach type forklift truck.

[0002]

BACKGROUND OF THE INVENTION Forklifts are widely used for lifting and lowering relatively heavy loads and for transporting them to desired locations within confined areas. Such a forklift truck is divided into an engine forklift truck and an electric forklift truck depending on what power source is used. The former is mainly used in the outdoor area, and the latter is often used in the indoor area because it produces less soot and noise. Further, the forklift includes a standard type forklift in which the mast assembly is fixed to the vehicle body, and a reach type forklift configured to move the mast assembly back and forth with respect to the vehicle body along the reach leg, that is, to perform a reach operation. are categorized. Standard type forklift trucks are generally equipped with an engine, and reach type forklift trucks are often so-called electric reach type vehicles equipped with an electric motor and a battery for supplying electric power thereto.

A conventional electric reach type forklift truck has a vehicle body and an overhead guard installed on the upper portion of the vehicle body, and the vehicle body has a pair of reach legs extending forward and in a lower portion of the vehicle body. . A relatively small diameter road wheel is attached to the tip of each reach leg, and a drive wheel having a diameter larger than that of the road wheel is attached to the lower portion of the vehicle body via a suspension device. The vehicle body has a power room and a driver's cab arranged in parallel in the latter half of the body, and a hydraulic control room and an electric device room arranged in the upper and lower parts of the front half, and the electric device room is further divided into the electric control room in the left-right direction. It is subdivided into a battery compartment.

On the other hand, a pair of rails are installed in the reach leg so as to face each other, and each rail has a guide groove extending in the longitudinal direction thereof. A mast assembly is installed on the rail so that it can be moved forward or backward,
The forward / backward movement of the mast assembly, that is, the reach operation is performed by a reach cylinder installed in parallel with the rail. As an example of the mast assembly, a two-stage mast assembly,
There is a three-stage mast assembly that can lift luggage to a higher place.

The two-stage mast assembly comprises an outer mast, an inner mast telescopically engaged with the outer mast, and a lift cylinder for moving the inner mast up and down.
A plurality of pulleys for holding the chain or the hydraulic line are attached to the upper end of the inner mast, the rear end of the chain is fixed to the outer mast, and the carriage having a fork is attached to the tip of the mast. There is.

In contrast, the three-stage mast assembly includes an outer mast, an intermediate mast telescopically engaged with the outer mast, an inner mast telescopically engaged with the intermediate mast, and an intermediate mast. And a lift cylinder that moves up and down with respect to the outer mast. Further, a plurality of pulleys for holding the first lift chain are attached to the upper end of the intermediate mast, the rear end of the lift chain is fixed to the outer mast, and the tip thereof is fixed to the lower end of the inner mast. A carriage cylinder is attached to the inner mast, and the carriage cylinder is composed of a cylinder housing and a cylinder rod. A second lift chain or a plurality of pulleys for holding hydraulic lines is attached to the tip of the cylinder rod of the carriage cylinder, and the rear end of the lift chain is fixed to the inner mast, and the fork is attached to the tip thereof. A carriage having is attached.

[0007]

In the conventional electric reach type forklift as described above, a heavy battery of up to 500 kg, for example, is laterally stored in the battery storage chamber. Such a battery is held by a bed, which is provided with a number of support rollers that make rounding contact with the bottom surface of the battery when pushing or removing the battery into or from the storage chamber. In order to prevent the battery from moving to the side opening side of the storage chamber due to vibration or inertia during operation of the forklift, the bed is tilted at a fine angle so that its outer end is slightly higher than its inner end. Is installed.

When the battery power is exhausted, the discharged battery must be removed from the containment chamber and replaced with a new battery. However, as mentioned above, the bed is installed with the outer end higher than the inner end, so it is very difficult and dangerous to remove a heavy battery through the side opening, and in the case of a female driver, It may not be possible to remove the battery without the role of a person.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electric reach type forklift truck that can be safely taken out from a storage chamber with a small amount of battery and a small force.

[0010]

An electric reach type forklift according to the present invention for achieving the above object includes a vehicle body provided with a battery storage chamber having a side opening, and a vehicle body extending forward from the vehicle body. A pair of reach legs, a pair of rails attached to the reach legs, a mast assembly having a mast base movably mounted on the rails in the front-rear direction, and a storage chamber for holding the battery. The bottom end has an outer end adjacent to the side opening and an inner end remote from the side opening, and the outer end is at or about the same height as the inner end. A battery bed that is capable of tilting between a first position that is held higher and a second position where the outer end is held lower than the inner end, and a chit that tilts the battery bed to the second position. Consisting of a door means.

The tilt means is a lift arm installed on the battery bed so as to be pivotable about a pivot axis between a folding position substantially parallel to the battery bed and a deployed position substantially perpendicular to the battery bed. , An arm actuating means for swinging the lift arm to a deployed position,
And a pushing-up means for pushing the deployed lift arm upward to tilt the battery bed to the second position.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a partially cutaway side view of an electric reach type forklift according to an embodiment of the present invention. Referring to FIG. 1, an electric reach type forklift according to the present invention includes a vehicle body 10, and an overhead guard 1 for protecting a driver from a falling object is provided on an upper portion of the vehicle body 10.
2 is installed, and a battery 1 as a power source is provided in front of it.
A battery storage chamber 16 for receiving 4 is provided. In addition, the vehicle body 10 includes a pair of reach legs 18 that pass through a lower portion of the battery storage chamber 16 and extend side by side forward.
It has a pair of rails 20 fixed to the inner surface of the reach leg 18.

A mast assembly 22 is attached to the rail 20.
Are connected to each other, and the vehicle body 1 is operated according to the operation of the reach cylinder 24.
It will slide in the front-back direction with respect to 0. The mast assembly 22 includes a fork 28 that moves up and down by a lift cylinder 26, and a load to be moved is placed on the fork 28. A drive wheel 30 is installed on the bottom of the vehicle body 10 via a suspension device (not shown), while a road wheel 32 is attached to the tip of the reach leg 18.

As shown in FIG. 2, the battery storage chamber 1
6 is surrounded by a center plate 34, a front cover 36, and a side cover 38, and a side opening 40 is formed on the opposite side of the side cover 38 for pushing in or taking out the battery 14. Then, the center plate 34
On the other side of the battery storage chamber 16, a driver's cab 42 and a drive device chamber 44 are arranged in parallel with each other. Further, the above-described mast assembly 22 has a mast base 46 arranged between the rails 20 as clearly shown in FIG. 2, and guide rollers 48 are attached to both ends of the mast base 46. The mast base 46 moves smoothly along the rail 20 in the front-rear direction. Besides, mast base 46
A push member 50 is provided upright on the push member 5
0 has an upper sloping surface 52 sloping backward and downward. In this way, the push member 50 is attached to the mast base 4
The reason for installing in No. 6 will be described later.

On the other hand, at the bottom of the battery storage chamber 16, a battery bed 54 for holding the battery 14 is installed across the reach leg 18 and the rail 20 in the lateral direction of the forklift. The battery bed 54 has an outer end portion adjacent to the side opening 40 of the battery storage chamber 16 and an inner end portion remote from the side opening 40, in other words, adjacent to the side cover 38. According to the present invention, the battery bed 54 has a first position in which its outer end is held at a height substantially equal to or higher than that of the inner end and a second position in which its outer end is held lower than the inner end. A tilting movement is possible between the positions. This will be described later with reference to FIGS. 4 and 5.

As clearly shown in FIG. 3, the battery bed 54 includes a pair of side beams 56, 56 'extending side by side in the lateral direction of the forklift. An outer end beam 58 is provided at both ends of the side beams 56, 56 '.
And the inner end beam 60 is attached. The outer end beam 58 is joined to the left reach leg 18 in FIG. 2 by a hinge pin 62, while the inner end beam 60 is shown.
Is simply placed on the reach leg 18 on the right. As a result, the battery bed 54 can be rotated about the hinge pin 62 at a desired angle. Further, the battery bed 54 has a plurality of roller shafts 64 arranged at equal intervals along the lengths of the side beams 56 and 56 ', and the battery 14 is slidably held at both ends of each roller shaft 64. Support roller 6
6 are attached. Then, the side beam 56
A bracket 68 having a substantially “U” shape is welded to the side surface of the bracket so as to be adjacent to the outer end beam 58 and the inner end beam 60.

A side guard 70 for preventing the battery 14 from moving forward of the forklift is engaged with the bracket 68 of the side beam 56, and an outer end portion of the side guard 70 has the battery on the side of the storage chamber 16. One end of the end guard 72 that prevents the end guard 72 from moving toward the opening 40 is locked by a latch pin 74. As shown in FIG. 2, the other end of the end guard 72 is fitted through the center plate 34. It is preferable to mount a soft pad 76 for protecting the battery 14 from an impact on the inner surface of the end guard 72. Battery 14
When pushing in or taking out into the storage chamber 16, it is necessary to first remove the latch pin 74 and separate the end guard 72 alone or together with the side guard 70 from the battery bed 54.

Referring to FIGS. 2 and 3, a lift arm 78 is installed on the side beams 56, 56 'of the battery bed 54 so as to be rotatable about a pivot shaft 80 between a folded position and a deployed position. You can see that it was done. The lift arm 78 is substantially parallel to the battery bed 54 when it is in the folding position, but is substantially perpendicular to the battery bed 54 when it is rotated to the unfolding position. The lift arm 78 has an end roller 82 rotatably installed at its free end, and a rotation axis 84 of the end roller 82 is orthogonal to a pivot axis 80 of the lift arm 78. Also, the lift arm 78 will always be biased to the folded position by a return spring, eg, a torsion spring 86.
A stopper block 87 is fixed to the inner surface of the side beam 56 'so as to be adjacent to the pivot shaft 80 to limit the turning angle of the lift arm 78.

As shown in FIGS. 2 and 4, the vehicle body 1
An arm pedal 88 is rotatably installed on the center plate 34 of 0, and the pedal 88 is operatively connected to a lift arm 78 by a link 90. As shown in FIG. 4, the links 90 are attached to the lever portion 88a of the arm pedal 88 and the protrusion portion 78a of the lift arm 78 by ball joints 92 or other suitable pivoting means, respectively. When the arm pedal 88 is depressed and rotated counterclockwise, the lift arm 78 urges the force of the torsion spring 86 to pivot to the deployed position, and when the arm pedal 88 is released, the lift arm 78 forces the torsion spring 86. Thus, the arm pedal 88 is returned to the folding position, so that the arm pedal 88 is also returned to the original position when rotated clockwise.

Next, a method for taking out the battery from the battery storage chamber in the electric reach type forklift having the above-mentioned structure will be described with reference to FIGS. 4 to 7.

Initially, the battery bed 54 pivots clockwise around the hinge pin 62 and moves to the first position shown in FIG.
Held in position. At this time, the battery bed 54 comes to make an α angle with respect to the horizontal plane.
Will tend to move to the inside of the storage chamber 16, that is, to the side cover 38 side. Therefore, it is possible to reliably prevent the battery 14 from accidentally sliding to the side opening 40 side during the operation of the forklift.
Further, since the side guard 70 and the end guard 72 are attached to the battery bed 54, the battery 14
Flow is minimized.

When the battery 14 is taken out from the storage chamber 16, first, the arm pedal 88 is depressed to rotate it counterclockwise. As a result, the lift arm 78 urges the force of the torsion spring 86 and pivots from the folded position to the deployed position, thereby forming a substantially right angle with respect to the battery bed 54. Further pivotal movement of the lift arm 78 is prevented by the stopper block 87.

As described above, when the reach cylinder is operated to retract the mast base 46 with the lift arm 78 in the deployed position, the push member 50 moves below the lift arm 78, and eventually the push member is moved. 5
The inclined surface 52 of 0 comes into contact with the end roller 82 as shown in FIG. 7. Then, when the mast base 46 is retracted to the end, the inclined surface 52 of the push member 50 causes the lift arm 78 to be pushed upward by the cam action, which causes the battery bed 54 to move toward the hinge pin 62 as shown in FIG. Turn to the second position around.
At this time, since the battery bed 54 makes a β angle with the horizontal plane, the battery 14 tends to slide from the bed 54 to the side opening 40 side. Therefore, the operator of the forklift can easily move the battery 1 from the storage chamber 16 without applying too much force.
4 can be taken out.

When the removal of the battery 16 is completed, the mast base 46 is further advanced to return the battery bed 54 to the first position, and then the arm pedal 88 is released to cause the lift arm 78 to move by the restoring force of the torsion spring 86. Return to the folding position of 4. Then, a new battery is pushed into the battery storage chamber 16.

[0026]

As described above, according to the electric reach type forklift of the present invention, the battery bed can be tilted so that its outer end is lower than its inner end by using the force of the reach cylinder. Therefore, it is possible to easily and safely take out the heavy battery from the storage chamber.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an electric reach type forklift according to the present invention.

FIG. 2 is a partially cutaway cross-sectional view of an electric reach type forklift showing an internal configuration of a battery storage chamber.

FIG. 3 is an exploded perspective view of a battery bed and a lift arm.

FIG. 4 is a partially cutaway vertical sectional view showing the internal structure of the battery storage chamber, showing a shape in which the battery bed is placed in the first position and the lift arm is held in the folding position. is there.

FIG. 5 is a view similar to FIG. 4, showing the battery bed lifted to a second position and the lift arm pivoted to a deployed position.

FIG. 6 is a view showing a state where the mast base is retracted and the inclined surface of the push member is in contact with the end roller of the lift arm.

FIG. 7 is a diagram showing a state in which the mast base is retracted to the end and the lift arm and the battery bed are lifted by a push member.

[Explanation of symbols]

 10 Vehicle Body 12 Overhead Guard 14 Battery 16 Battery Storage Room 18 Reach Leg 20 Rail 22 Mast Assembly 24 Reach Cylinder 26 Lift Cylinder 28 Fork 30 Drive Wheel 32 Road Wheel 34 Center Plate 36 Front Cover 38 Side Cover 40 Side Opening 42 Driver's Cab 44 Drive Unit Chamber 46 Mast Base 48 Guide Roller 50 Push Member 52 Sloping Surface 54 Battery Bed 56 Side Beam 56 'Side Beam 58 Outer End Beam 60 Inner End Beam 62 Hinge Pin 64 Roller Shaft 66 Support Roller 68 Bracket 70 Side Guard 72 End guard 74 Latch pin 76 Soft pad 78 Lift arm 78a Projection 80 Pivot shaft 82 End roller 84 Rotation shaft 86 Torsion Spring 87 Stopper Block 88 Arm Pedal 88a Lever Part 90 Link 92 Ball Joint

Claims (12)

[Claims] 1. A vehicle body provided with a battery storage chamber having side openings, a pair of reach legs extending forward from the vehicle body, and a pair of reach legs mounted on these reach legs.
A pair of rails, a mast assembly having a mast base movably installed in the rails in the front-rear direction, and a mast assembly disposed at the bottom of the battery storage chamber for holding a battery and adjacent to the side opening. A first position and an outer end having an outer end and an inner end remote from the side opening, and wherein the outer end is held at or about the same height as the inner end. An electric reach type forklift including a battery bed that can be tilted between a second position that is held lower than the inner end portion and tilting means that tilts the battery bed to the second position. 2. A lift installed on the battery bed such that the tilt means is pivotable about a pivot axis between a folding position substantially parallel to the battery bed and a deployed position substantially perpendicular to the battery bed. An arm, an arm actuating means for swinging the lift arm to a deployed position, and a lifting means for lifting the deployed lift arm upward to tilt the battery bed to a second position. The electric reach type forklift according to claim 1. 3. The lift arm includes an end roller rotatably installed at a free end thereof, and the end roller has a rotation axis orthogonal to a pivot axis of the lift arm. Electric reach type forklift described. 4. The arm operating means includes an arm pedal rotatably attached to the vehicle body, and the lift arm is operably connected to the lift arm so that the lift arm can be operated in accordance with the operation of the arm pedal. The electric reach type forklift according to claim 2, wherein the forklift is composed of a link that can turn from a folded position to a deployed position or vice versa. 5. The push-up means comprises a push member erected on a mast base of the mast assembly, and the push member has an inclined surface that comes into contact with an end roller of the lift arm when the mast base is retracted. The electric reach type forklift according to claim 3. 6. The electric reach type forklift according to claim 2, wherein the tilting means further comprises a return spring for biasing the lift arm to a folding position. 7. A pair of side beams in which the battery beds are extended side by side in the lateral direction of the forklift, an outer end beam and an inner end beam attached to both ends of the side beams, and the side beams. The electric reach type forklift according to claim 1, comprising a plurality of roller shafts arranged at equal intervals along the length and support rollers installed at both ends of each roller shaft. . 8. The electric reach type forklift according to claim 7, wherein the outer end beam of the battery bed is attached to a corresponding reach leg via a hinge pin. 9. The battery bed further comprises a side guard for preventing the battery from moving forward of the forklift and an end guard for preventing the battery from moving toward a side opening of the battery storage chamber. The electric reach type forklift according to claim 7, wherein the guard is detachably connected to the side guard by a latch pin. 10. A vehicle body provided with a battery storage chamber having a side opening, and an outer end portion adjacent to the side opening and disposed at a bottom portion of the battery storage chamber of the vehicle body for holding a battery. A first position having an inner end remote from the side opening, the outer end being held at approximately the same height as or higher than the inner end and the outer end being lower than the inner end. A battery bed that can be tilted between a second position that is held, and a pivot position that is pivotal between a folding position that is substantially parallel to the battery bed and a deployed position that is substantially perpendicular to the battery bed. A lift arm installed on the battery bed, arm actuating means for pivotally moving the lift arm to a deployed position, and pushing the deployed lift arm upward to tilt the battery bed to a second position. An electric reach type forklift characterized by being configured with a push-up means for inclining movement. 11. The arm actuating means includes an arm pedal rotatably attached to the vehicle body, and the lift arm is operably connected to the lift arm so that the lift arm is operated in accordance with the operation of the arm pedal. The electric reach type forklift according to claim 10, wherein the forklift is configured with a link that can be swung from a folded position to a deployed position or vice versa. 12. The push-up means comprises a push member standing on a mast base of the mast assembly, and the push member has an inclined surface for pressing the lift arm upward when the mast base is retracted. The electric reach type forklift according to claim 11.