JPH07315115A - Brake device of high place working vehicle - Google Patents

Abstract

PURPOSE:To provide a brake device with a simple structure and favorable durability in a driver driving type high place working vehicle travelling by the drive of a running wheel by manual rotating the running handle on an elevating working stand. CONSTITUTION:A brake device is made so that a handle lock member 46 is fixed on the rotary shaft 36 of a running handle 44 arranged on the control column 35 on an elevating working stand and plural engagingly lock receiving parts 47 are formed on the handle lock member 46, while a lock lever 49 provided with an engagingly locking body 51 engagingly locked to plural engagingly lock receiving part 47 alternatively is arranged near the handle lock member 46 and a running wheel can be fixed unrotatably. The brake device is made so that the handle lock member 46 is formed by a disc body on whose peripheral part plural recessed grooves are engraved and a pin installed on a lock lever side can be engaged with the plural recessed grooves alternatively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand propelling aerial work vehicle which is driven by a human hand to rotate a traveling handle on an elevating work table to drive traveling wheels to travel. The device is related to.

[0002]

2. Description of the Related Art As shown in FIG. 5, a rider-propulsion aerial work vehicle has traveling wheels (1) (1) and caster wheels (2) (2).
An optional lifting mechanism such as an X-shaped link on the chassis (3) equipped with
Equipped with a lifting workbench (5) via (4), the lifting workbench
(5) A pair of left and right traveling handles (6) and (6) mounted on the upper side are manually operated to rotationally drive the traveling wheels (1) and (1) to perform forward / backward traveling and left / right steering. Is configured as follows.

[0003] It is dangerous for the aerial work vehicle to unexpectedly move during work or when the worker separates from the aerial work vehicle.
Although the conventional brake device is provided with a key device, as shown in FIG. 6, a brake arm (7) or a similar device which can be freely pressed and released from the traveling wheel (1), as shown in FIG. The other brake member is provided, and the brake pedal is mounted on the lifting workbench (5) by a flexible connecting cable (8).
The brake pedal (9) is connected to the brake pedal (9) to lock the brake pedal in the braking state to prevent an unexpected movement.

[0004]

Since the brake device in the conventional rider-propulsion type aerial work vehicle is constructed as described above, it has the following problems. Since a brake member for braking the traveling wheels (or axles) and a flexible connecting line for connecting the brake member and the brake pedal are required, the number of parts increases and the device becomes complicated.

Further, since the flexible connecting line is repeatedly bent and bent as the lifting worktable is moved up and down, it is easily damaged and causes a problem in durability. Further, the lifting workbench is lowered and stored. At this time, it is necessary to secure a space for storing the flexible connecting line on the chassis, so that it is not possible to cover the chassis, and a device or a component member arranged on the chassis is generated during the work. There is also a problem that it is adversely affected by the accumulation of dust such as sparks and material scraps.

[0006]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems, and in order to achieve the object, the following technical means are taken to make a vehicle for aerial work vehicles. It is a device. That is, in the brake apparatus for an aerial work vehicle according to the present invention, the traveling handle (44) mounted on the control column (35) on the elevating workbench (25) is manually rotated, and the rotational force is lifted. In a rider-propulsion aerial work vehicle that travels by being transmitted to traveling wheels (21) via a transmission mechanism (41) capable of following the vertical movement of (24), a traveling handle
A handle lock member is attached to the rotary shaft (36) into which the (44) is fitted.
Engaging body for fixing (46) and alternatively engaging with a plurality of lock receiving portions (47) formed on the handle lock member (46)
A lock lever (49) provided with (51) is arranged in the vicinity of the handle lock member (46), and the engaging body (51) is retained by the lock receiving portion.
It is characterized in that the traveling wheel (21) is fixed in a non-rotatable state via the transmission mechanism (41) by engaging with (47) and locking the traveling handle (44). .

Then, the handle lock member (46) is formed of a disk body, and a plurality of recessed grooves are formed in the peripheral edge portion of the disk body to form the lock receiving portions (47). The engaging body (51) on the side of the lock lever (49) can be formed with a pin that selectively engages with the recessed groove to simplify the structure, and the lock lever (49) can be provided with a steering column ( 35) Wide part
It is attached to the pivot shaft (48) provided laterally on (35b), and the wide part (3
The operability can be improved by extending downward along the inner surface of the narrow portion (35a) of the steering column within the width of 5b).

[0007]

In the aerial work vehicle in which the device of the present invention is implemented, when the traveling handle (44) mounted on the operation column (35) on the elevating workbench (25) is manually rotated, the rotational force is transmitted. It is transmitted to the traveling wheels (21) through the mechanism (41) and the aerial work vehicle travels. Then, when the lock lever (49) is operated to the locking side when the vehicle is stopped at a desired place to work at a high place or when the worker leaves, the engaging body (51) provided on the lock lever (49) is provided. ) Engages with one of the lock receiving portions (47) of the handle lock member (46) to lock the traveling handle (44), and
The traveling wheels (21) are also fixed in a non-rotatable state via (41).

Also, the lock lever operated to the locking side.
When (49) is returned to the unlocking side, the traveling handle
The lock of (44) is released and the traveling wheel (21) is returned to a state in which the traveling wheel (21) can be rotationally driven by manual rotation of the traveling handle (44). Then, the traveling wheels (21) are locked and unlocked at the traveling handle (44) portion mounted on the operation column (35) on the elevating workbench (25) and directly on the traveling wheel portion. The apparatus is simple and excellent in durability because it does not require a break member involved and a flexible connecting line connecting the break member and the brake pedal.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows a side cross-sectional view of a main part of the device of the present invention, and FIG. 2 shows a front cross-sectional view thereof. 3 and 4 show a side view state and a front view state of an aerial work vehicle in which the device of the present invention is implemented.

First, referring to FIGS. 3 and 4, the overall structure of an aerial work vehicle to which the device of the present invention is applied will be described. The aerial work vehicle (20) includes a pair of left and right traveling wheels (21).
(21) and caster wheels (22) and (22) at the front and rear portions of a chassis (23), and a lifting mechanism (2 mounted on the chassis (23).
4) and a lifting work table (25) mounted on the upper part of the lifting mechanism (24).

The illustrated lifting mechanism (24) is composed of a pair of left and right link mechanisms (26), (26) which are X-shaped in a side view, and one link lower end of the link mechanisms (26) (26). This part is pivotally attached to the chassis (23) by the pivot (23a), and the lower end of the other link is attached to the guide rail (27) mounted on the chassis (23) by roller engagement, and Car platform
The upper end of the link pivotally attached to (23) is moved up and down the workbench (25)
Is engaged with the guide rail (28) mounted on the upper end of the link and the upper end of the other link is pivotally attached to the lifting worktable (25).
(23b) is pivotally mounted to support the lifting worktable (25).

An extender (31) composed of a fluid pressure cylinder is interposed between a seat (29) provided on the chassis (23) and a mounting portion (30) provided on the link mechanism (26). Elastic (3
(1) is made to expand and contract by the pressure of the fluid supplied and discharged by the foot-operated fluid pump (32) mounted on the lifting workbench (25), and the lifting mechanism (24) is bent and stretched in the vertical direction to raise and lower the workbench (25). Is configured to move up and down.

The elevating mechanism (24) is a multi-stage link mechanism in which two or more X-shaped link mechanisms are vertically connected to each other, or an expansion / contraction mechanism different from the X-shaped link mechanism. In some cases. Further, the elevating mechanism (24) is not limited to be operated by the fluid pressure cylinder, but is configured to be operated by, for example, an electric motor powered by a battery mounted on the chassis (23). The structure may be arbitrarily modified.

The lifting workbench (25) has a work stage (33).
A safety fence (34) that also serves as a handrail is provided around the
A pair of left and right control columns (35) (35) are erected at a required position on the chassis, and each control column (35) has a chassis (23) as shown in FIGS. 1 and 2. It is composed of a narrow portion (35a) rising from the above and a wide portion (35b) continuously provided at the upper end thereof.

The wide portion of each control column (35)
A rotary shaft (36) is rotatably provided laterally on (35b),
A driving sprocket (37) is fitted and fixed to the rotary shaft (36), and a driven sprocket is fitted to the pivot shaft (23b), so that the chains (38) are attached to both sprockets.
Are hung around each. Further, a chain (39) is hung around another sprocket fitted on the pivot (23b) and a sprocket provided on the shaft (23c) pivotally attaching the intersection of the X-shaped link mechanism, and The chain (40) is hung around another sprocket fitted to the (23c) and the sprocket fitted to the pivot (23a), and these chains are
X-shaped link mechanism (24) with (38) (39) (40)
Left and right transmission mechanism that can flex and extend following the flexion and extension
(41) and (41) are configured.

Thus, the shaft (23c), which is the final shaft of each transmission mechanism (41), is interlockingly connected to the axle (43) of the traveling wheel (21) via the final transmission mechanism (42). On the other hand, the inner shaft end of the rotary shaft (36) has a wide portion (3
5b) is projected from the inner wall surface toward the inner side of the work stage 33, and a crank-shaped manual traveling handle 44 is attached to the projecting portion. In addition, the transmission mechanism
The chain (38) of (41) is the narrow part of the control column.
The wide portion (35b) can be tensioned by the chain tensioning mechanism (45) configured to move the wide portion (35b) up and down with respect to (35a).

Further, in the inside of the wide portion (35b), a handle lock member formed of a disc body is attached to the rotary shaft (36).
(46) is fitted and fixed, and a plurality of locking receiving portions (47) ... Are provided by engraving recessed grooves at a peripheral edge thereof at a predetermined pitch. Further, a pivot shaft (48) parallel to the rotating shaft (36) is laterally provided in the wide portion (35b), and a lock lever (49) having a boss portion fitted to the rotating shaft (36) is provided with a wide portion ( 35b) extending downward along the inner surface of the narrow portion (35a) within the lateral width of 35b), and the rocking arm (50) is provided at the boss portion of the lock lever (49). A pin, which is an engaging body (51) for engaging and disengaging with the lock receiving portion (47) of the handle lock member (46), is laterally fixed to the tip portion thereof.

The lock lever (49) and the wide portion
A torsion coil spring (52) is interposed by hooking both spring ends to the wall of (35b), and the spring force exerts a force on the engaging body (5).
1) engaging with the lock receiving portion 47 (see the solid line in FIG. 1) and the engagement body (51) disengaged from the lock receiving portion 47 (shown in phantom in FIG. 1). (See state) and is configured to be able to hold beyond the dead center.

When the aerial work vehicle constructed as described above is to be moved, the lock lever (49) is maintained in position by the torsion coil spring (52) in the state shown by the phantom line in FIG. The state in which 51) is not engaged with the lock receiving portion (47) is maintained. In this state, the left and right running handles
When both (44) and (44) are manually rotated in the forward direction (F) at the same number of rotations, the rotational force is transmitted through the transmission mechanisms (41) (41) and the final transmission mechanism (42) to the left and right traveling wheels (21) ( 21) Axle
(43) (43) is transmitted to the aerial work vehicle going straight ahead, and when the left and right traveling handles (44) and (44) are both turned backward (R) by the same number of revolutions, The work vehicle goes straight in the backward direction.

While the vehicle is traveling forward, if the right hand drive handle is turned in the forward direction (F) more than the left hand drive handle, it will turn left, and conversely, the left hand drive handle will be more forward than the right hand drive handle. Turn right into (F) and turn right.
Also, both the left and right traveling handles (44) (44)
Even when the vehicle is running backwards by turning to the right (R), if you turn the right side handle more than the left side handle in the backward direction (R), you will turn backward and turn left. If you turn in the rearward direction (R), you will make a right turn backward.

After traveling as described above to move the aerial work vehicle to a desired place, the aerial work is performed at the place.
Alternatively, when the aerial work vehicle is parked, the lock lever (49) is grasped and moved from the position shown by the phantom line in FIG. 1 to the position shown by the solid line, and the engagement of the tip of the swing arm (50) is stopped. Union (5
1) engages with one of the lock receiving portions (47) of the handle lock member (46) to lock the traveling handle (44) in a non-rotatable manner, and the traveling wheel (41) through the transmission mechanism (41). (21)
Is also fixed so that it cannot rotate. And rock lever (49)
Is positioned in the state shown by the solid line in FIG. 1 by the spring force of the torsion coil spring (52).

[0022]

According to the apparatus of the present invention, the traveling wheels are locked and unlocked by locking the traveling handle provided on the elevating work table so as not to be rotatable, and directly related to the traveling wheel portion. Brake member or break member and break
Since a flexible connecting tether for connecting to the pedal is not required, the entire device becomes significantly simpler than the conventional one, and since the flexible connecting tether is not used, there is no need to worry about its damage or durability, and Since there is no need to secure a space for storing the flexible connecting line on the chassis, it is possible to cover the chassis and avoid the accumulation of sparks, dust and other debris generated during work. it can.

Then, the handle lock member (46) is formed of a disc body, and a plurality of recessed grooves are formed in the peripheral portion of the disc body to form the lock receiving portions (47). When the engaging body (51) on the lock lever (49) side is formed by a pin which selectively engages with the recessed groove, the device is further simplified.
Further, a lock lever (49) is attached to a pivot shaft (48) laterally provided on the wide portion (35b) of the steering column (35) and extends downward along the inner surface of the narrow portion (35a) of the steering column. When the lock lever is pulled out, the lock lever (49) is compactly housed, and it is possible to prevent accidental operation due to accidental contact with another object.

[Brief description of drawings]

FIG. 1 is a side sectional view of a main part of a device of the present invention.

FIG. 2 is a front sectional view of a main part of the device of the present invention.

FIG. 3 is a side view of an aerial work vehicle in which the device of the present invention is implemented.

FIG. 4 is a front view of an aerial work vehicle in which the device of the present invention is implemented.

FIG. 5 is a side view showing a conventional aerial work vehicle.

FIG. 6 is an explanatory view showing a conventional brake device for an aerial work vehicle.

[Explanation of symbols]

 21 Traveling Wheel 24 Lifting Mechanism 25 Lifting Workbench 35 Control Column 35a Narrow Part 35b Wide Part 36 Rotating Shaft 41 Transmission Mechanism 44 Traveling Handle 46 Handle Locking Member 47 Locking Receiving Port 48 Pivot Shaft 49 Lock Lever 51 Engaging Body

Claims (3)

[Claims] 1. A control column (35) on a lifting workbench (25).
A transmission mechanism capable of manually rotating a traveling handle (44) mounted on the vehicle and following the vertical movement of the lifting mechanism (24) with the rotational force.
In the rider propulsion type aerial work vehicle which travels by being transmitted to the traveling wheels (21) via (41), the traveling handle (44)
An engaging body (51) for fixing the handle lock member (46) to the rotating shaft (36) for fitting the lock shaft, and for selectively engaging a plurality of lock receiving portions (47) formed on the handle lock member (46). )
The lock lever (49) provided with the handle lock member (4
6) is provided in the vicinity of the engaging body (51) and the lock receiving portion (47)
Of the aerial work vehicle characterized in that the traveling wheels (21) are fixed in a non-rotatable state via the transmission mechanism (41) by engaging with the vehicle and locking the traveling handle (44). Breaking device. 2. The handle lock member (46) is formed of a disk body, and a plurality of recessed grooves are formed in the peripheral edge of the disk body to form the lock receiving portions (47), Rock lever
2. The aerial work vehicle according to claim 1, wherein the engaging body (51) on the (49) side is formed by a pin which selectively engages with the recessed groove.
Ki device. 3. A steering column (35) for operating the lock lever (49).
Attached to a pivot shaft (48) laterally provided in the wide portion (35b) of the steering column, and within the width of the wide portion (35b), the narrow portion of the control column
The extension (35) extends downward along the inner surface of the (35a).
Alternatively, a brake device for an aerial work vehicle according to claim 2.