JP2000219494A - Hand lifter protecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit safe conveyance by preventing a worker's foot or foreign matter such as a pebble or a wooden chip fallen on a floor, from being caught in a caster when conveying a hand lifter. SOLUTION: This hand lifter protecting device is composed of a body member 31 detachably attached to an under carriage 4 of a hand lifter 1, and skirt member 33 formed of hard rubber material or the like and fitted to the body member 31 so as to be extended to the outer peripheral part of a main caster 10. The hand lifter protecting device is additionally provided at the hand lifter 1 provided with a load receiving base 2; a caster 3 imparting traveling ability to the load receiving base 2; elevating mechanism 5 disposed between the load receiving base 2 and the under carriage 4 of the caster 3; and a handle member 6 driving the elevating mechanism 5 to put the load receiving base 2 in elevating action with respect to the under carriage 4 of the caster 3 and performing a handle function during travel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection device for a hand lifter used when a heavy object such as a pallet is transported in a factory or the like.

[0002]

2. Description of the Related Art A hand lifter is used as a simple transfer device for transferring a pallet or the like on which a heavy object is mounted in a factory or the like. The hand lifter has a loading platform, a plurality of casters, an elevating mechanism arranged between the loading platform and the caster chassis, and a driving mechanism for driving the lifting mechanism to move the loading platform relative to the caster chassis. And a handle member or the like that performs a handle function during traveling.

[0003] The hand lifter raises the load receiving table by driving the lifting mechanism with the fork of the load receiving table inserted into the fork space of the pallet. The hand lifter thereby lifts the pallet from the floor surface to a slightly floating state via the loading tray. The hand lifter pulls the handle member to convey the pallet to a predetermined location. When the hand lifter is transported to a predetermined place, the lifting mechanism is driven to lower the load receiving table and place the pallet on the ground. In this state, the hand pallet lifts the load receiving tray from the fork space of the pallet.

[0004]

By the way, in a hand lifter, a handle member and a caster are arranged at one end of a load receiving table, and by pulling the handle member in a state where the handle member is tilted obliquely forward. It is transported to an appropriate place. Therefore, in the hand lifter, the distance between the worker and the receiving stand, in other words, the distance between the worker and the caster is maintained in the range of the length of the handle member in a normal use state, so that safety is ensured. It has become. However, in the case of a hand lifter, for example, when an operator attempts to move by stepping on the foot, the feed of the foot is delayed, and there is a possibility that an unexpected accident may occur due to being caught in the caster. Therefore, when operating the hand lifter, the worker must wear safety shoes.

On the other hand, in a hand lifter, a caster having a relatively small diameter is generally used, and a tire body formed of an elastic material such as rubber in consideration of weight resistance and maintenance characteristics is used as a wheel. It is configured to be directly attached to Therefore, the hand lifter
When the caster lands on the floor and hits a foreign substance such as a large pebble or wood chip, the caster is likely to be locked. If the hand lifter attempts to forcibly overcome the shock or foreign matter in the locked state, there is a possibility that the hand lifter may collapse the load.

Therefore, the present invention is designed to prevent a foreign object such as pebbles or wood chips falling on the feet or floor of an operator from being caught in a caster when a hand lifter is conveyed, so that a safe conveyance can be performed. It has been proposed for the purpose of providing a protection device for a hand lifter.

[0007]

According to the present invention, there is provided a protection device for a hand lifter, which achieves the above-described objects, includes a receiving stand, a caster for imparting traveling properties to the receiving stand, and a base for the receiving stand and the caster. An elevating mechanism arranged between them,
The lifting mechanism is driven to move the load receiving platform up and down with respect to the caster chassis, and is attached to a hand lifter having a handle member having a handle function during traveling. The protection device for the hand lifter includes a main body member that is attached to and detached from the chassis, and a skirt member made of a hard rubber material or the like attached to the main body member so as to extend to an outer peripheral portion of the caster.

[0008] According to the hand lifter protection device of the present invention configured as described above, when the hand lifter is transported or the like, the skirt member that covers the outer peripheral portion of the caster causes the foot of the operator to be involved in the accident. To prevent Further, according to the protection device for the hand lifter, the skirt member located in front of the caster eliminates a relatively large dust that has fallen on the floor surface so that smooth conveyance can be performed.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. The protection device 30 shown as the embodiment improves the safety and traveling performance of the worker by being attached to the conventionally used hand lifter 1. The hand lifter 1 is used in a factory or the like.
For example, it is used when transporting a pallet 16 on which an article 20 such as a product or material is mounted to a predetermined place, and is pulled and moved by an operator while the pallet 16 is slightly lifted from the floor surface.

The pallet 16 is composed of a stacking plate 17 and a grounding plate 18 which are connected to each other in parallel with each other via a pier (not shown) as shown in FIG. And a pair of left and right fork insertion spaces 19 divided by a crosspiece. The pallet 16 is configured as a space enough for the fork insertion space 19 to be able to insert a fork 8 of the load receiving table 2 described later. The transported object 20 is mounted on the loading plate 17 on the pallet 16. Of course, the hand lifter 1 is also used for transporting an appropriate pallet such as a bucket type pallet or other transported objects.

The hand lifter 1 is, as shown in FIG.
A load receiving table 2 that lifts and holds a pallet 20 on which an object 20 is mounted, a plurality of casters 3 for imparting traveling properties to the load receiving table 2, a load receiving table 2 and casters 3
And a hydraulic cylinder 5 that constitutes an elevating mechanism disposed between the undercarriage 4 and the undercarriage 4.
Of the caster 3 with respect to the chassis 4 and a handle member 6 having a handle function during traveling.

In the hand lifter 1, the load receiving table 2 is composed of a main body 7 and a pair of parallel forks 8 whose one ends are cantilevered by the main body 7. . The main body 7 has a pair of left and right main casters 10 (10a, 10b) forming casters 3 on the bottom surface thereof.
Are arranged. The main casters 10 are respectively mounted on caster support shafts 12 rotatably supported by a steering mechanism (not shown) attached to the chassis 4 via a chassis support shaft 11. Main caster 10
Although not described in detail, is constituted by a wheel and a tire made of hard rubber or the like fitted into the wheel.

The fork portion 8 has an outer shape that can be inserted into the fork insertion space portion 19 of the standard pallet 16 as described above. In order to smoothly insert the fork portion 8 into the fork insertion space portion 19 of the pallet 16, an inclined guide 8a is formed at the tip end thereof. A guide caster (guide roller) 9, which constitutes the caster 3, is disposed on the bottom surface of the fork portion 8 near the tip end. The guide caster 9 has a smaller diameter than the main caster 10,
Although not shown, the chassis is fork portion 8
Can be moved up and down with respect to the supporting portion.

The hand lifter 1 is provided with a hydraulic cylinder 5 disposed on the main body 7 of the load receiving table 2 and between the main caster 10 and the chassis 4. Hydraulic cylinder 5
Is driven by vertically operating the handle member 6 in a state where the lock mechanism is released. In the hydraulic cylinder 5, the cylinder shaft 13 is pushed upward by the tilting operation of the handle member 6,
The loading platform 2 is pushed upward with respect to the chassis 4. The hydraulic cylinder 5 is driven by operating a release mechanism (not shown), and lowers the load receiving table 2 to the initial position.

The handle member 6 is composed of a handle bar 6a and a handle portion 6b provided at the tip thereof, although the details are omitted. The lower end of the handle bar 6a is located in front of the main body 7 of the load receiving table 2. It is connected to and supported by a steering mechanism that is not shown in detail. Handle member 6
Converts the direction of the main caster 10 via the steering mechanism by rotating the handle 6b right and left. The handle member 6 drives the hydraulic cylinder 5 by performing a vertical movement as described above.

The hand lifter 1 constructed as described above
Is moved to the pallet 16 on which the load 20 is mounted on the loading plate 17 on the floor, and the fork 8
Is pushed into the fork insertion space 19. In the hand lifter 1, the guide casters 9 of the fork portion 8 are shown in FIG.
As described above, the above-described swing operation of the handle member 6 is performed in a state where the handle member 6 is penetrated through the ground plate 18 and grounded on the floor surface. As a result, the hydraulic cylinder 5 of the hand lifter 1 is driven, and the cylinder shaft 13 pushes the load receiving table 2 upward with respect to the chassis 4.

The hand lifter 1 is in a state where the overall vehicle height is increased and the pallet 16 is lifted off the floor. In this state, the handle member 6 is tilted forward, and the hand lifter 1 conveys the pallet 16 to a predetermined place by pulling the handle portion 6b. The hand lifter 1 places the pallet 16 on the floor by releasing the lock mechanism and returning the hydraulic cylinder 5 to the initial state in a state where the pallet 16 is positioned at a predetermined position. In the hand lifter 1, the fork portion 8 is extracted from the fork insertion space portion 19.

It should be noted that the protection device 30 described later is not limited to the hand lifter 1 having the above-described configuration, but can be applied to various other commonly used hand lifters. Of course.

The hand lifter 1 constructed as described above
As described later, a protection device 30 that protects a worker when the pallet 16 is transported or the like and that prevents the load of the transported object 20 from the pallet 16 from being collapsed is mounted. Protection device 3
Reference numeral 0 denotes a body member 31, a skirt attachment member 32 attached to one end of the body member 31, a skirt member 33 attached to the skirt attachment member 32, and an adapter member. The protection device 30 is mounted on the chassis support shaft 11 of the hand lifter 1 as shown in FIGS. When the protection device 30 is attached to the hand lifter 1, the protection device 30 is positioned with respect to the main caster 10 in the traveling direction of the hand lifter 1 (left side in FIG. 1).

The main body member 31 is formed of a metal plate or the like having mechanical rigidity.
Mounting part 31b and flange part 3 formed integrally with 1a
1c. As shown in FIGS. 3 and 4, the main body member 31 has an attachment portion 31b formed by a semi-cylindrical portion bent in a semicircular arc shape on a part of the main body portion 31a. The mounting portion 31b has an inner diameter substantially equal to the outer diameter of the chassis support shaft 11. In the main body member 31, a flange portion 31c is integrally formed on one end side of the main body portion 31a via a mounting portion 31b. Mounting holes are formed in the flange portion 31c so as to correspond to mounting holes formed on the main body portion 31a side with the mounting portion 31b interposed therebetween.

The skirt attachment member 32 is integrally attached to the tip of the main body member 31 by welding or the like. As shown in FIG. 2, the skirt mounting member 32 has a length sufficient to extend forward with respect to the traveling direction of the left and right main casters 10a and 10b, and is entirely bent in a substantially rectangular shape. It is constituted by a plate-like member. The skirt attachment member 32 has a height that is located slightly above the ground contact portion of the main caster 10 when the protection device 30 is attached to the hand lifter 1, as shown in FIG. The skirt attachment member 32 has a number of attachment holes formed in the length direction along the lower end thereof.

The skirt member 33 is formed of, for example, hard rubber, has a length substantially equal to that of the above-described skirt mounting member 32, and is similarly bent in a substantially rectangular shape. The skirt member 33 is attached while being suspended from the skirt attachment member 32 by attachment screws 35 whose upper ends are screwed into a number of attachment holes. The skirt member 32 is in a state where the protection device 30 is attached to the hand lifter 1 as described later.
As shown in FIG. 3, the left and right main casters 10a, 10b
Extend forward with respect to the traveling direction of the vehicle. In this state, the lower end of the skirt member 32 is substantially in contact with the floor surface as shown in FIGS.

The skirt member 32 is extended in front of the main caster 10 as described above, so that the skirt member 32 is prevented from getting caught in the main caster 10 even in the event that the worker's feet are delayed. The skirt member 32 is elastically deformed even when the worker's foot is pinched, so that the foot can be taken out and does not cause any injury.

The skirt member 32 is located in front of the main caster 10 when the hand lifter 1 travels, and sweeps the floor. Since the skirt member 32 is formed of hard rubber or the like as described above, the skirt member 32 has a certain degree of mechanical rigidity and has a substantially bent shape, so that a slightly large foreign substance is present on the floor surface. If it has fallen, remove it to the side. The skirt member 32 removes foreign matter from the traveling path of the main caster 10 so that the hand lifter 1 travels in a stable state.

The adapter member 34 is provided with the main body member 3 described above.
In cooperation with the first mounting portion 31b, a mounting portion of the protection device 30 to the hand lifter 1 is configured. Adapter member 34
Is composed of a semi-cylindrical main body portion 34a symmetrical to the mounting portion 31b of the main body member 31, and flange portions 34b and 34c integrally provided on both sides of the main body portion 34a. The adapter member 34 is assembled with the main body member 31 by abutting the flange portions 34b and 34c with the opposing main body portion 31a and flange portion 31c. The adapter member 34 thereby forms a cylindrical portion having an inner diameter substantially equal to the outer diameter of the chassis support shaft 11 by the semi-cylindrical main body portion 34a and the mounting portion 31b of the main body member 31, as shown in FIG. .

The adapter member 34 has the mounting shaft 36 screwed into the opposite mounting holes and is connected by the nut 37 while the chassis support shaft 11 is sandwiched between the main body portion 34a and the mounting portion 31b of the main body member 31. The protection device 30
Thereby, it is mounted on the hand lifter 1.

The protection device 30 configured as described above includes:
As shown in FIGS. 1 and 2, the skirt mounting member 32 and the skirt member 33 extend forward in the running direction with respect to the main caster 10 and are mounted on the hand lifter 1. For example, when the worker steps on the foot to move the hand lifter 1, the protection device 30 is provided by the skirt member 33 even if the feed of the foot is delayed.
So that safe handling can be performed.

The protective device 30 also removes foreign matter such as pebbles and wood chips on the floor surface by the skirt member 33 so as to prevent the foreign matter from being caught in the main caster 10. Therefore, the protection device 30 prevents the occurrence of an accident in which the main caster 10 stops moving, the hand lifter 1 stops suddenly, and the load 20 conveyed on the pallet 16 collapses.

The present invention is not limited to the configuration of the protection device 30 described above, but includes a mounting portion for the hand lifter 1 and a skirt member 33 extending at least forward in the traveling direction of the main caster 10. What is necessary is just to comprise. As for the mounting portion, the mounting portion 31b of the main body member 31 and the main body portion 34a of the adapter member 34 described above are also provided.
However, the present invention is not limited to this configuration. Skirt member 33
As described above, it is preferable that the device be replaceable in consideration of the rubbing of the floor surface or the elastic deterioration due to use.

[0030]

As described above in detail, according to the hand lifter protection device of the present invention, the skirt member made of an elastic material such as hard rubber has the outer peripheral portion of the caster when the main body is mounted on the chassis. When the hand lifter is transported or the like, the skirt member prevents the occurrence of an accident involving the feet of the worker, and also removes foreign matter that has fallen on the floor surface, thus ensuring smooth transport. To prevent the collapse of the load.

[Brief description of the drawings]

FIG. 1 is a side view illustrating an outline of a hand lifter equipped with a protection device according to the present invention.

FIG. 2 is a front view of a main part of the hand lifter.

FIG. 3 is a longitudinal sectional view of a main part illustrating a state where the protection device is mounted on a chassis support shaft of a hand lifter.

FIG. 4 is a plan view of a main part of the protection device.

[Explanation of symbols]

1 hand lifter, 2 loading trays, 3 casters, 4
Chassis, 5 hydraulic cylinder, 6 handle member, 7 main body, 8 fork, 9 guide caster, 10 main caster, 11 chassis support shaft, 12 caster support shaft,
16 Pallet, 19 Fork insertion space, 20 Conveyed object, 30 Protector, 31 Main body member, 32 Skirt member, 33 Skirt mounting member, 34 Adapter member

Claims (1)

[Claims] 1. A load receiving table, a caster for imparting traveling properties to the load receiving table, an elevating mechanism disposed between the load receiving table and a chassis of the caster; A base member attached to a hand lifter having a handle member for performing a lifting / lowering operation with respect to the chassis of the caster and performing a handle function at the time of traveling; and a main body member attached to the chassis, and at least the caster is attached to the main body member. A hand lifter protection device comprising: a skirt member formed of a hard rubber material or the like attached so as to extend to an outer peripheral portion in a traveling direction of the hand lifter.