JPH11236193A - Hood opening/closing mechanism of forklift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold a battery hood at the open position where the workability in checking and exchanging a battery is not damaged, and to avoid the interference of the hood with a handle during the opening/closing operation. SOLUTION: A battery hood 9 is turnably supported by a bracket 11 fixed to both stays 5 on the rear side through a hinge 12. The hinge 12 comprises a pair of fixed pieces 13 fixed to the bracket 11, a pair of first levers 15 whose first end part is turnably supported by the fixed pieces 13 through a support shaft 14a, and a second lever 16 whose base end is turnably supported by a second end part of the first lever 15 through a support shaft 14b. A damper 19 in which a rod 20a is energized to the projecting side is arranged between a machine frame and the battery hood 9. In the damper 19, an end part on a cylinder 20 side is turnably connected to the machine frame through a shaft 21, and an end part on the rod 20a side is turnably connected to a bracket 22 in which the end part on the rod 20a side is projected on the battery hood 9 through a pin 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hood opening / closing mechanism for a forklift, and more particularly to a hood opening / closing mechanism for covering a battery housing of a battery forklift or an engine housing of an engine forklift and having a seat on an upper surface. Things.

[0002]

2. Description of the Related Art Generally, in a forklift, a seat on which a driver sits is provided on an upper surface of a hood that covers an upper portion of a battery housing or an engine housing. Further, in order to maintain stability when a load is placed on the fork and running stability of the forklift, a counterweight is provided on the rear side of the body of the forklift.

In a battery forklift, a battery accommodating portion is provided in front of a counterweight near a rear portion of a vehicle body, and a battery including a battery case accommodating a plurality of battery cells is accommodated in the battery accommodating portion. When the battery is replaced, the battery is taken out of the battery housing with the hood fully opened, and a new battery or a charged battery is housed in the battery housing. The removal of the battery is performed by disposing the battery hood at the open position, lifting the battery with a crane or the like via a wire hooked into the hook hole of the battery case, and moving the battery in the width direction of the vehicle body. .

As this kind of hood opening / closing mechanism, as shown in FIG.
In general, a hinge 53 is provided rotatably supported through the hinge 2, and a hood 54 is fixed to a distal end side of the hinge 53.

In Japanese Utility Model Laid-Open Publication No. 58-188270, as shown in FIG. 8, movable links 55 and 56 are attached at two points in front and rear of a body frame 51, and an engine hood 57 is attached to the distal ends of the movable links 55 and 56. When the engine hood 57 is fully opened, the engine hood 57
Is translated on the counterweight 58. The publication also discloses that the engine hood 57
A configuration is also disclosed in which the positions of the movable links 55 and 56 that support the hood 57 are changed so that when the engine hood 57 is fully opened, the engine hood 57 is translated above the closed position.

[0006]

A steering wheel (handle) 59 and a loading / unloading lever 60 (only one is shown) provided in front of the driver's seat are disposed at positions where the driver can easily operate. The position is near the top of the hood tip. Therefore, in the conventional configuration in which the hood 54 is supported using the hinge 53 having the rotation center on the rear side, it is difficult to position the rotation center of the hood 54 on the upper side. The maximum opening angle of the hood 54 is
The seat (seat) 61 mounted on the upper surface of the vehicle is restricted to an angle at which the seat 61 comes into contact with the counterweight 58. Therefore, when the hood is fully opened, the base end of the hood 54 is located at a relatively low position above the battery housing portion or the engine housing portion. As a result, there is a problem that the hood 54 interferes with the battery case particularly when the battery is replaced in the battery forklift, and the workability is reduced.

This problem becomes more pronounced as the height of the hood side wall 54a increases. This is because the higher the side wall 54a, the larger the maximum radius Rmax of the rotation locus of the hood 54, and the longer the side wall 54a protruding forward at the open position, so that the side wall 54a easily interferes with the battery case. Therefore, in the case of a battery forklift, a hood having a low side wall is used to avoid interference between the battery case and the hood. For this reason, conventionally, the hood of the battery forklift and the hood of the engine forklift cannot be made common, and a dedicated hood is required for each, resulting in an increase in manufacturing cost.

[0008] In order to avoid interference between the hood 54 and the handle 59 during opening and closing of the hood 54, there is a type in which a column supporting the handle 59 can be tilted forward. However, there are various restricting factors in the angle at which the handle can be tilted, and it is difficult to tilt the handle to a position where interference with all the hoods can be avoided, and the mechanism becomes complicated.

On the other hand, in the hood opening / closing mechanism shown in FIG. 8, since the engine hood 57 is located above the counterweight 58 in the fully opened state, the upper part of the engine housing is completely opened. However, in the battery forklift, the width of the battery case is wider than the interval between the columns located on the left and right sides of the counterweight 58, and the width of the hood is also wider than the interval between the columns. Therefore, it is difficult to apply the above configuration to the battery forklift. If the distance between the columns is wider than the width of the battery case, there is a problem that the width of the forklift becomes large due to the mounting of the hood. Further, the configuration in which the engine hood 57 is moved in parallel above the closed position makes it impossible to lift the battery case with a crane at the time of battery replacement, and cannot be applied to a battery forklift.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide a hood disposed at an open position for maintenance of an engine in an engine forklift, or inspection and storage of a battery in a battery forklift. Hood opening / closing mechanism of a forklift that can keep the workability of taking out and storing the battery case from the part without impairing the workability, and avoiding the hood from interfering with the steering wheel (handle) and the loading / unloading lever during opening / closing Is to provide.

[0011]

According to the first aspect of the present invention, there is provided a hood opening / closing mechanism for covering a battery accommodating portion or an engine accommodating portion of a forklift and having a seat on an upper surface thereof. Having a pivot center behind the hood, rotatably supported on a body of the forklift in a plane perpendicular to the width direction of the vehicle body, and obliquely lower rearward in a closed state of the hood. A hood, which is disposed at a reference position extending toward the reference position and whose rotation is restricted downward from the reference position, and a support portion projecting from the base end is rotatably connected to the lever. A distance between the rotatable connecting portion with respect to the vehicle body and the hood is provided between the vehicle body and the hood, and the distance between the rotatable connecting portion is biased toward the extension side; of Location has a biasing means provided in the lower front side from the center of rotation of the lever.

[0012] In the invention described in claim 2, the biasing means is provided via the support portion until the tip of the hood is higher than the handle of the forklift when the hood is rotated from the closed position to the fully opened position. The position of the connecting portion with respect to the vehicle body side and the hood side is set so that the direction of the biasing force acting on the lever is a direction in which the lever is rotated downward from the reference position.

According to a third aspect of the present invention, in the first or second aspect of the invention, the support portion forms a part of a hinge formed separately from the hood, and a fastening member is provided. Is fixed to the hood through.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the urging means urges the cylinder and the cylinder so as to be able to protrude and retract from the cylinder. A first end is rotatably connected to the vehicle body, and a second end is rotatably connected to the hood.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects of the present invention, the position of the connecting portion on the hood side of the vehicle body in the closed state of the hood is determined. It is arranged so as to be located below the position of the side connecting portion.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the urging means is provided between the connecting portions in a state where the hood is arranged at a fully open position. Is maximized, and the lever is disposed so as to extend obliquely upward and rearward.

Therefore, according to the first aspect of the present invention, the hood is turned around the connecting portion of the support portion to the lever or the turning center of the lever. When the hood is turned from the closed position to the fully open position, the lever is biased until the direction of the urging force of the urging means acting on the lever via the support portion becomes a direction of turning the lever upward from the reference position. Is held at the reference position. Then, the hood is rotated around a connecting portion between the lever and the support portion arranged at the reference position. When the direction of the urging force of the urging means becomes a direction of rotating the lever upward from the reference position, the lever is rotated upward, and the hood is moved upward. When the hood is located at the fully open position, the position of the lower end of the hood is set at the center of rotation of the lever as compared with the conventional configuration in which the center of rotation of the support is set at the center of rotation of the lever. And about two times the distance from the center of rotation of the support portion to the center of rotation.

According to a second aspect of the present invention, in the first aspect of the present invention, when the hood is rotated from the closed position to the fully open position, at least until the tip of the hood is higher than the handle of the forklift. The hood is pivoted upward with a minimum radius around the pivot point between the lever held at the reference position and the support. Then, after the tip of the hood becomes higher than the handle of the forklift, the lever is rotated upward, and the hood is further moved upward.

According to a third aspect of the present invention, in the first or second aspect of the invention, the support portion is formed separately from the hood so as to form a part of a hinge, and a fastening member is provided. Is fixed to the hood through. Therefore, by changing the mounting position of the hinge with respect to the hood according to the type of forklift, it is possible to easily cope with the case where the lengths of the protrusions of the support portions are different.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the urging means expands and contracts linearly, and the hood is rotated from the closed position. As a result, the rod is projected. After the position of the connecting part on the hood side of the urging means is higher than the position of the connecting part on the vehicle body side, the urging force of the urging means also serves to urge the hood to the open side.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, when the hood is arranged at the closed position, the urging force of the urging means is reduced. Acts to bias the hood toward the closed side.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, a biasing means is provided for rotating the hood disposed at the fully open position to the closed position. The hood is turned forward while pushing down the hood against the urging force of the hood. Since the lever extends obliquely upward and rearward at the fully open position, the lever surely starts rotating rearward by the force pressing down the hood, and the hood is smoothly rotated toward the closed position.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a battery forklift (hereinafter simply referred to as a forklift) 1 will be described below with reference to FIGS. FIG.
As shown in FIG. 1, a machine frame 1 constituting a vehicle body of a battery forklift (hereinafter simply referred to as a forklift) 1.
A mast 2 is provided on the front side of a. The mast 2 is provided with a fork 3 that can be moved up and down via a lift bracket 3a. A counterweight 4
Is provided. Four pillars 5 are erected on the machine frame 1a constituting the vehicle body, and a driver's cab 6 is formed by a space surrounded by these pillars 5 and the head guard 5a.

A battery housing 7 is provided below the rear side of the cab 6.
Are provided, and a battery case 8 is
The battery accommodates a large number of battery cells (not shown). The battery case 8 has a hook hole (not shown) for hooking a wire (not shown) for lifting the battery case 8.

A battery hood 9 as a hood is disposed rotatably (openable and closable) above the battery housing 7, and a seat 10 (shown only in FIG. 3) is provided on an upper surface of an upper wall 9a. . The width of the battery hood 9 is formed to be wider than the interval between the pair of columns 5 on the rear side, and the width of the seat 10 is
Is formed narrower than the interval.

The side wall 9b and the front wall 9c of the battery hood 9 are formed high so that the distance between the upper end of the battery case 8 and the upper wall 9a is increased in the closed position. Further, the width of the lower side of the battery hood 9 is the width of the two columns 5 on the rear side.
The upper wall 9a is formed in a shape that can be inserted between the two support pillars 5 in a state where the upper wall 9a is formed wider than the gap of the support posts 5 and is arranged at the fully open position. As shown in FIG. 2, in this embodiment, both side walls 9 b are formed so as to be inclined toward the inside of the battery hood 9 so that the upper side of the battery hood 9 is narrower than the lower side. .

Brackets 11 (shown in FIGS. 1 and 4) are fixed to a pair of right and left columns 5 that constitute a part of the vehicle body. Each bracket 11 has a battery hood 9
A special hinge 12 as shown in FIG. 4 and FIG. The hinge 12 includes a pair of fixed pieces 13 fixed to the bracket 11, a pair of first levers 15 whose first ends are rotatably supported by the fixed pieces 13 via support shafts 14a, And a second lever 16 whose base end is rotatably supported via a support shaft 14b at a second end of the second lever 15. The second lever 16 has two screw holes 16a. Further, the bracket 11 is formed in an L shape, and as shown in FIG.
A notch 11c is formed on a support portion 11b orthogonal to the mounting portion 11a with respect to the support 5 to avoid interference with the first lever 15 and the second lever 16. For convenience of illustration, the fixing piece 13, the first lever 15, and the second lever 1
6 and the distance between the screw holes 16a are different from those in FIG.

The first lever 15 is configured to be reciprocally rotatable within an angle between the first lever 15 and the fixed piece 13 within a predetermined range. In this embodiment, as shown in FIG. 1, the first lever 15 is rotatable in a range of approximately 90 to 260 degrees with respect to the fixed piece 13 in a state where the fixed piece 13 is fixed horizontally. . The first lever 15 has a center of rotation behind the battery hood 9, is rotatably supported on the vehicle body of the forklift 1 in a plane orthogonal to the width direction of the vehicle body, and when the battery hood 9 is closed. While being disposed at a reference position shown by a solid line in FIG.
This constitutes a lever that is restricted from turning downward from the reference position.

As shown in FIG. 1, the second lever 16 has its tip end inserted into the battery hood 9,
Battery hood 9 via bolt 17 as a fastening member
It is fixed to. A support plate 18 is integrally formed inside the battery hood 9, and the second lever 16 penetrates through holes (not shown) formed on both right and left sides of the support plate 18, and bolts screwed into the screw holes 16 a. 17 fastens and is fixed to the support plate 18. The second lever 16 protrudes from the base end side of the battery hood 9 and constitutes a support portion rotatably connected to the lever (first lever 15).

A so-called damper 19 is provided between the frame 1a and the battery hood 9. Damper 1
Reference numeral 9 denotes a cylinder 20 and a rod 20a which can be protruded and retracted from the cylinder 20 and is urged to the projecting side. The rod 20a is formed to be extendable. The damper 19 has a cylinder-side end (first end) rotatably connected to a bracket (not shown) fixed to the machine frame 1a via a shaft 21 as a connection part. An end (second end) on the 20a side is provided on a bracket 22 projecting from the lower surface of the support plate 18 with a pin 23 as a connecting portion.
Is rotatably connected via a. The shaft 21 is the support shaft 14
It is provided on the front lower side than a. As shown in FIG.
In this embodiment, the bracket 22 is connected to the battery hood 9.
The damper 19 is connected to the battery hood 9 at the center in the width direction.

The damper 19 is configured so that the distance between the rotatable connecting portions with respect to the vehicle body side and the hood side can be expanded and contracted, is urged toward the extending side, and the position of the connecting portion on the vehicle body side is determined by the lever (the first lever). The urging means is provided below the rotation center of the lever 15) on the front side.

When the battery hood 9 is pivoted from the closed position to the fully open position, the damper 19 operates via the second lever 16 until the tip of the battery hood 9 is at least higher than the handle 24 of the forklift 1. Lever 1
The positions of the shaft 21 and the pin 23 are set such that the direction of the urging force acting on the lever 5 is a direction in which the first lever 15 is rotated downward from the reference position. In this embodiment, the direction of the urging force acting on the first lever 15 via the second lever 16 is changed to the first lever while the battery hood 9 is rotated to a position extending substantially perpendicularly to the front-rear direction of the vehicle body. The positions of the shaft 21 and the pin 23 are set in relation to the position of the first lever 15 in the state where the shaft 21 and the pin 23 are arranged at the reference position so that the direction of rotation of the lever 15 is higher than the reference position. Further, the damper 19 is disposed such that the distance between the shaft 21 and the pin 23 is maximized and the first lever 15 extends obliquely upward and rearward when the battery hood 9 is disposed at the fully open position. ing.

The machine frame 1a is provided with hooks (both not shown) that can be engaged with the engaging portions provided on the battery hood 9. Then, the hook is locked to the locking portion in a state where the battery hood 9 is arranged at the closed position, and the battery hood 9 is held at the closed position.

Next, the operation of the hood opening / closing mechanism configured as described above will be described. FIG. 6 is a schematic diagram illustrating a positional relationship among the first lever 15, the second lever 16, and the damper 19 when the battery hood 9 is opened and closed. The positional relationship between the tip of the second lever 16 and the pin 23 of the damper 19 is always constant. The battery hood 9 is kept in a closed state shown by a solid line in FIGS. 1 and 3 except when the battery is replaced or inspected. The damper 19 is extended and contracted linearly, and a connecting portion (pin 23) of the damper 19 on the battery hood 9 side.
Until the position is higher than the position of the connecting portion (shaft 21) on the vehicle body side, there is no action to urge the battery hood 9 to the open side, but thereafter the battery hood 9 is urged to the open side. In a state where the battery hood 9 is disposed at the closed position, the urging force of the damper 19 acts on the battery hood 9 so as to be directed obliquely downward. Therefore, the urging force acts to press the battery hood 9 toward the closed position.

When the battery case 8 is taken out of the battery accommodating portion 7 for battery replacement, first, the hook and the locking portion for holding the battery hood 9 in the closed position are released. Becomes openable. In this state, the operator holds the tip of the battery hood 9 by hand and rotates it upward. First lever 15
Indicates that the direction of the urging force of the damper 19 acting on the first lever 15 via the second lever 16 turns the first lever 15 upward (counterclockwise in FIGS. 1 and 6A) from the reference position. It is held at the reference position until it is moved. That is, when the battery hood 9 is turned to the open side (clockwise direction in FIG. 1) from the closed position shown in FIG.
Until the second lever 16 is aligned with the first lever 15 as shown by the solid line in FIG. 6B, the urging force of the damper 19 causes the first lever 15 to rotate clockwise in FIG. 6A. Direction. Therefore, during that time, the first lever 15 is held at the reference position, and the battery hood 9 is turned around the support shaft 14b of the first lever 15 fixed at that position. Therefore, the radius of the rotation locus of the tip of the battery hood 9 is kept at a minimum. Then, the tip of the battery hood 9 is rotated without interfering with the handle 24 and the cargo handling lever (not shown).

When the second lever 16 is further rotated clockwise in FIG. 6B from the state shown by the solid line in FIG. The urging force 19 turns the first lever 15 counterclockwise in FIG. 6B. Then, FIG.
6B, the first lever 15 is rotated counterclockwise in FIG. 6B about the support shaft 14a, and the base end of the second lever 16 starts to move upward from the closed position.
Then, the battery hood 9 is in the fully open position with the damper 19 extended most, and the battery hood 9 is held at that position. In this state, as shown in FIG. 6C, the first lever 15 extends obliquely upward and rearward. Further, in this state, as shown by a chain line in FIG. 1, a part of the battery hood 9 enters between the columns 5, and the side wall 9b comes into contact with a cushion rubber (not shown) of the column 5. In this state, the damper 19 acts to urge the battery hood 9 to the open side, so that the battery hood 9 is held at the open position.

The battery hood 9 is locked in an open state by a known locking mechanism (not shown) so that the battery hood 9 is not accidentally closed against an external pressure. The lock mechanism is locked when the battery hood 9 is fully opened, and when the battery hood 9 is closed, the operator performs a release operation of the lock mechanism.

In FIG. 1, the position of the battery hood 9 indicated by a chain line indicated by C is in a fully opened state when the center of rotation is set to the position of the support shaft 14a using a hinge having a conventional simple structure (single-axis structure). Is the position corresponding to The position of the battery hood 9 in the case of this embodiment shown by B in FIG. 1 is such that the height of the base end of the battery hood 9 is approximately two times the length of the first lever 15 as compared with the conventional configuration. It is moved up a double distance.

In this state, the hook of the wire is hooked in the hooking hole of the battery case 8 as in the conventional case, and the battery case 8 is connected to the battery accommodating portion 7 via the wire by the crane.
Lift from inside. Then, after the lower end of the battery case 8 is raised so as to be higher than the upper end of the battery accommodating portion 7, the battery case 8 is moved in the width direction of the vehicle body to the side opposite to the side where the damper 19 is provided, and placed on a battery carrier (not shown).

Next, the battery case 8 containing a new battery cell or a battery cell already charged is
It is stored in the battery storage unit 7 in the reverse order of the removal operation. Then, after rotating the battery hood 9 to the closed position, the hook is disposed at the locking position where the hook is locked to the locking portion, and the battery replacement operation is completed.

When rotating the battery hood 9 to the closed position, hold the tip of the battery hood 9
The battery hood 9 is turned forward while pushing down the battery hood 9 against the urging force of the battery hood 9. Since the first lever 15 extends obliquely upward and rearward at the fully open position, the first lever 15 is reliably rotated rearward (in a direction to move the battery hood 9 to the closed side) by the force pressing down the battery hood 9. Starting, the battery hood 9 is smoothly rotated toward the closed position.

This embodiment has the following effects. (1) The distance between the base end of the battery hood 9 and the rotation center at the fully open position is larger than that at the fully closed position, and the distance between the lower end of the battery hood 9 and the battery housing 7 at the fully open position is large. That is, when the fixing position of the hinge 12 that supports the battery hood 9 is the same as that of the related art,
The position of the base end of the battery hood 9 in the fully opened state becomes higher than before. Therefore, the workability of the work for inspecting the battery and taking out and housing the battery case 8 from the battery housing 7 is improved.

(2) When the battery hood 9 is rotated from the closed position to the fully open position, the battery hood 9 is held at the reference position at least until the tip of the battery hood 9 is higher than the handle 24 of the forklift 1. A connecting portion between the first lever 15 and the second lever 16 (support shaft 14
It is rotated upward with a minimum radius around a). Therefore, during opening and closing, the battery hood 9 is
4 and the cargo handling lever can be avoided.

(3) A supporting portion for rotatably supporting the battery hood 9 is formed as a second lever 16 of the hinge 12 separately from the battery hood 9 and the bolt 1
7 is fixed to the battery hood 9. Therefore, even if the length of the supporting portion protruding from the battery hood 9 varies depending on the type of forklift, it can be easily dealt with by changing the attachment position of the hinge 12 to the battery hood 9, and the supporting portion is integrated with the battery hood 9. The manufacturing of the battery hood 9 becomes easier as compared with the case formed in the above.

(4) Since the urging means is constituted by the so-called damper 19, a commercially available product can be used as it is, and the structure is simplified. (5) When the battery hood 9 is located at the closed position, the urging force of the damper 19 is
Battery hood 9 to act to bias the
It is possible to omit a holding means (for example, a combination of a locking portion and a hook) for holding the lock in the closed position.

(6) The first lever 15 in the fully open position
Is extended obliquely upward and rearward, the first lever 15 reliably starts rotating in the closing direction of the battery hood 9 by the force pressing down the battery hood 9, and the battery hood 9 smoothly rotates toward the closed position. Be moved.

(7) Since the position of the base end of the battery hood 9 is moved upward from the conventional position at the fully open position, the seat 10 mounted on the battery hood 9 interferes with the counterweight 4 to restrict the opening angle. Can be avoided.

(8) The height of the base end of the battery hood 9 in the fully open position is determined by the length of the first lever 15 and the damper 1.
Since it can be set by the stroke of 9, it is easy to set the fully open position of the battery hood 9 to an appropriate position according to the model.

(9) The height of the side wall 9b of the battery hood 9 can be increased, and the battery hood 9 can have the same shape as the engine hood of the engine forklift, thereby reducing the hood manufacturing cost. In addition, by forming the upper portion of the side wall 9b so as to be inclined inward, the fully open position of the battery hood 9 can be moved further rearward while avoiding interference with the column 5.

(10) Since the urging means (damper 19) is connected to the battery hood 9 inside the battery hood 9, contact of the urging means with an obstacle can be avoided.

(11) Since the urging means (damper 19) is provided at the center of the battery hood 9, the urging force of the urging means acts on the battery hood 9 in a well-balanced manner, and the opening / closing operation of the battery hood 9 is smooth. It is easy to be performed.

(12) Since the height of the side wall 9b of the battery hood 9 is higher than that of the conventional battery hood, the internal volume of the battery hood 9 is larger. Therefore,
It is also possible to arrange electric components and auxiliary equipment inside the battery hood 9.

The embodiment is not limited to the above, and may be embodied as follows, for example. The connection position of the damper 19 to the battery hood 9 is not limited to the center of the battery hood 9 but may be a position deviated from the center. Further, a plurality of dampers 19 may be provided instead of one. When a pair of dampers 19 are provided on the left and right sides of the battery hood 9, the urging force of the dampers 19 acts on the battery hood 9 in a well-balanced manner.
Each of the dampers 19 can have a small urging force.

The connection structure between the second lever 16 and the support plate 18 includes a screw hole 1 formed in the second lever 16.
6a, instead of screwing the bolt 17 into the second lever 16
And bolt 1 penetrating through a hole formed in support plate 18
7 and a nut screwed to the bolt 17 may be used. Also, a pin having a male screw is protruded from one of the support plate 18 and the second lever 16, and a hole through which the pin is formed is formed in the other, and the second lever 16 is screwed to the male screw with a nut. May be fastened and fixed to the support plate 18.

Instead of fixing the second lever 16 to the battery hood 9 via a support plate 18 or a bracket provided on the battery hood 9, the battery lever 9
May be directly fixed via bolts and nuts.

○ The first hinge 12 is not used without using the special hinge 12.
A support portion connected to the lever 15 may be formed integrally with the battery hood 9, and the battery hood 9 may be rotatably connected to the first lever 15 via a support shaft 14 b penetrating the support portion.

Instead of the damper 19, a biasing means is constituted by a plurality of levers (preferably levers having a U-shaped cross section) slidably connected and a spring for biasing the lever in the extension direction. Is also good.

The position of the biasing means is not limited to the position where the position of the connecting portion on the hood side is located below the position of the connecting portion on the vehicle body side when the battery hood 9 is closed.
Both connecting portions may be at the same height or a position where the connecting portion on the hood side is disposed above. In this case, the battery hood 9
In the closed state, the urging means does not urge the hood to the closing side, so that holding means for holding the hood in the closed state is required.

The first lever 15 is connected to the battery hood 9
Is not limited to a state of extending obliquely upward and rearward in a state of being disposed at the fully open position, but may be arranged to be a state of extending directly upward or a state of extending upward and forward.

The first lever 15 is fixed to the fixing piece 13 and the second
Instead of configuring as one part of the hinge 12 connected to the lever 16 by the support shafts 14a and 14b, the first lever 15 is turned around a support shaft supported directly on the machine frame 1a or the support column 5 or via a bracket. It may be movably supported. In this case, a regulating member that engages with the first lever 15 disposed at the reference position and regulates the rotation of the first lever 15 from the reference position to the front side is provided on the machine frame 1a.

The width of the upper side of the battery hood 9 may be formed to be wider than the interval between the columns 5 on the rear side, similarly to the lower side. In this case, the fully open position of the battery hood 9 is on the front side of the support 5.

The configuration of each of the above embodiments may be applied to an engine hood of an engine forklift. When the present invention is applied to an engine hood, effects other than the effects specific to the battery forklift are obtained among the effects corresponding to the above embodiments.

The technical ideas (inventions) other than those described in the claims, which can be understood from the above embodiments, will be described below together with their effects. (1) In the invention according to any one of claims 1 to 6, the urging means is connected to the hood inside the hood. In this case, since the urging means does not protrude outside the side wall of the hood, the urging means can be prevented from contacting an obstacle during traveling.

(2) In the invention according to any one of claims 1 to 6 and (1), the urging means is connected to the hood at a central portion in the width direction.
In this case, even if the number of the urging means is one, the urging force of the urging means acts on the hood in a well-balanced manner, so that the hood can be smoothly opened and closed.

(3) Claims 1 to 6 and (1),
(2) In the invention described in any one of (2) and (5), the hood is formed such that a width of a lower side thereof is wider than a distance between both rear columns, and a width of an upper side is narrower than a distance between both rear columns. In the open position, the hood is substantially perpendicular to the longitudinal direction of the vehicle body. In this case, the fully opened position of the hood can be moved further backward while avoiding interference with the support.

(4) Claims 1 to 6 and (1) to
(3) In the invention described in any one of (3) and (4), the hood is a hood that covers a battery housing portion of a battery forklift. In this case, the hood can be held at the open position without impairing the operability of the battery inspection and battery replacement work in the battery forklift, and the hood can be prevented from interfering with the handle or the cargo handling lever during opening and closing.

(5) Claims 1 to 6 and (1) to
A forklift equipped with the hood opening / closing mechanism according to any one of (4). In this case, the hood can be held in the open position without impairing the operability of the engine maintenance work in the engine forklift or the battery inspection and battery replacement work in the battery forklift, and the hood interferes with the handle and the cargo handling lever during opening and closing. Can be avoided.

[0068]

As described in detail above, claims 1 to 6 are provided.
According to the invention described in the above, the hood can be held in the open position without impairing the workability of the engine maintenance work in the engine forklift, or the battery inspection and battery replacement work in the battery forklift, and the hood can be opened and closed during the opening and closing of the handle. And interference with the cargo handling lever.

According to the second aspect of the invention, it is possible to reliably prevent the battery hood from interfering with the handle during opening and closing. According to the third aspect of the present invention, even if the length of the support portion protruding from the hood differs depending on the type of forklift, it can be easily dealt with by changing the attachment position of the hinge to the hood, and the support portion can be mounted on the hood. The manufacture of the hood becomes easier as compared with the case where the hood is integrally formed.

According to the fourth aspect of the invention, the urging means can be constituted by a so-called damper, and a commercially available urging means can be used as it is, and the structure is simplified.
According to the fifth aspect of the present invention, when the hood is arranged at the closed position, the urging force of the urging means acts to urge the hood toward the closed side, so that the hood is held at the closed position. Holding means can be omitted.

According to the sixth aspect of the present invention, when the hood in the fully open position is closed, the lever surely starts rotating in the closing direction of the hood by the force pressing down the hood, and the hood smoothly moves toward the closed position. Is rotated.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view of a hood opening and closing mechanism according to an embodiment.

FIG. 2 is a rear view of a battery hood.

FIG. 3 is a schematic side view of a forklift.

FIG. 4 is a plan view showing a relationship between a hinge and a bracket.

FIG. 5 is a schematic perspective view of a hinge.

FIG. 6 is a schematic diagram showing a positional relationship between a damper and both levers when the hood is opened and closed.

FIG. 7 is a schematic side view showing a conventional hood opening / closing mechanism.

FIG. 8 is a schematic side view showing another conventional hood opening / closing mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Forklift, 1a ... Machine frame which comprises a vehicle body, 7 ... Battery storage part, 9 ... Battery hood as a hood, 10 ... Seat, 12 ... Hinge, 14a ... Support shaft as a rotation center, 15 ... Lever 1st lever of 16
.. A second lever as a support portion, 17 a bolt as a fastening member, 19 a damper as a biasing means, 20 a cylinder, 20a a rod, 21 a shaft as a connecting portion, 23
... pins as connecting parts, 24 ... handles.

Claims (6)

[Claims] An opening / closing mechanism for a hood, which covers a battery accommodating portion or an engine accommodating portion of a forklift and is provided with a seat on an upper surface thereof, wherein the opening / closing mechanism has a rotation center behind the hood. While being rotatably supported in a plane perpendicular to the width direction of the vehicle body, and disposed at a reference position extending obliquely downward and rearward in the closed state of the hood,
A lever that is restricted from pivoting downward from the reference position; a hood having a support protruding from the base end side rotatably connected to the lever; and a hood provided between the vehicle body and the hood. The distance between the rotatable connecting portion with respect to the vehicle body side and the hood side is configured to be expandable and contractable, and is urged toward the extension side, and the position of the connecting portion on the vehicle body side is below the rotation center of the lever on the front side. A hood opening / closing mechanism for a forklift provided with a biasing means provided in the forklift. 2. The urging means acts on the lever via the support portion when the hood is turned from the closed position to the fully open position until the tip of the hood is higher than the handle of the forklift. The hood opening / closing mechanism for a forklift according to claim 1, wherein the position of the connecting portion with respect to the vehicle body and the hood is set such that the direction of the force is to rotate the lever downward from the reference position. 3. The forklift according to claim 1, wherein the support portion forms a part of a hinge formed separately from the hood, and is fixed to the hood via a fastening member. Hood opening and closing mechanism. 4. The urging means includes a cylinder and a rod which is retractable with respect to the cylinder and is urged to a protruding side, a first end portion of which is rotatably connected to a vehicle body and a second end of which is rotatable. The hood opening / closing mechanism of a forklift according to any one of claims 1 to 3, wherein the end is rotatably connected to the hood. 5. The urging means is arranged such that, when the hood is closed, a position of a connecting portion on a hood is lower than a position of a connecting portion on a vehicle body. The hood opening / closing mechanism for a forklift according to any one of the above. 6. The urging means is disposed such that a distance between the connecting portions is maximized in a state where the hood is arranged at a fully open position, and the lever extends obliquely upward and rearward. The hood opening and closing mechanism for a forklift according to any one of claims 1 to 5.