DE2953069T5 - DEVICE FOR LOADING AND UNLOADING LIFT TRUCK - Google Patents

Description

HOEGER, LAW & PARTNER

PATENT LAWYERS
UHLANDSTRASSE 14 c ■ D 70OO STUTTGART 1 2 9 5 3 U

A 44 108 b Applicant: KABUSHIKI KAISHA TOYODA

k- 176 JIDOSHOKKI SEISAKUSHO

April 14, 1980 1, Toyoda-cho 2-chome

Kariya-shi
Aichi 448 / Japan

description

Title of the invention
LOAD LIFTING UNIT FOR A PALLET TRUCK.

Technical area

The invention is concerned with a load lifting unit
for a lift truck and in particular with a load lifting unit for a lift truck of the counterweight type
where a load center is placed as close as possible to the body of the pallet truck, for the purpose of improving the stability of the pallet truck and increasing the permissible load, under conditions where
which offer different types of working devices
are mounted on the load lifting unit.

Technical background

In general, in a load lifting unit of a lift truck, in particular a lift truck of the counterweight type, a lifting cylinder for raising and lowering a

030607/0020 ~ ^lo ~

A 44 108 b

k - 176 - ψ - 5

April 14, 1980

Lifting element with a fork carriage etc. and holding devices, such as a lifting roller, etc., in a central area between the left and right uprights arranged. Consequently, the lifting cylinder is arranged in front of the driver's seat, so that a wide area of the The driver's field of vision to the front is obscured.

It is therefore difficult to see signs or obstacles or to observe the front end of a fork. This load lifting unit has various problems in terms of safety and work efficiency. Since the lifting cylinder is arranged in such a central area between the uprights, must also a device such as a sideways sliding fork, a hinged fork, a fork with a winch, a rotatable clamp or an extendable fork can be mounted in such a way that the base part of the device is attached to the lifting element in such a way that no interference occurs in the interaction with the lifting cylinder. In order to meet this requirement, the device is generally mounted on the fork carriage, which is arranged at the front of the stand. Because of this, the distance between the layers of the load center of the device and the center in front of the front wheels long. Since the device is its own In addition, the position of the load center is further forward from the operating mechanism Body moved away. As a result, the allowable load of the lift truck is reduced so that a truck

-11-

030 6 0 7/0020

A 44 108 b /

k - 176 - \ K - (ff

April 14, 1980

Lifting operation cannot be effected by using a conventional fork, and it is possible to use only that To achieve load capacity of a less powerful pallet truck if the above-mentioned device instead the usual fork is attached to the car. To significantly reduce the load capacity too overcome, it has been proposed to increase the thickness of the device, in particular, to reduce the thickness of the actuating mechanism of the same, in order to reduce the lost strength to win back. For the case of the rotatable bracket or the rotatable fork, for example proposed reducing the thickness of the rotor gear of a rotor while increasing its diameter. However, if the thickness of the components of the device is decreased, the size of the component in a vertical plane should be increased to the desired to maintain mechanical strength of the components. Therefore, the height of the device and the projected area of the device in the vertical plane is increased and accordingly the visibility is increased Concealed at the front and the visible area for forward operation from the driver's seat is greatly narrowed. In the- * "This relationship was first a countermeasure to

Improvement of the view from the driver's seat of the pallet truck

^ suggested forward. A specific example of the

The proposal is published in Japanese Patent application no. Sho 49-29661. However, no countermeasure has yet been proposed that is suitable for both an improvement in vision

-12-

030 6 07/0020

. ".. _Tr " _

A 44 108 b / U

k - 176 - LZ- U-

April 14, 1980 /

front as well as an increase in the permissible load and also a positive promotion of safety to achieve.

Disclosure of the invention

It is therefore an object of the present invention to provide an improved construction for a load lifting unit, which is suitable for improving the forward view from the driver's seat of a pallet truck, and which nevertheless is able to achieve an increase in the allowable load and an improvement in the stability of a To achieve lift truck of the counterweight type. The present invention proposes to achieve this goal first before, the lifting cylinders, components of the load lifting unit, separated on the sides of the left and the right stand to form a space between these stands and to ensure to expand the visible area of the forward view, and further uses the following arrangement. In particular, due to the fact that the allowable load can be increased when the distance between the center of the front wheels of the pallet truck and the load center (or the center of gravity of the Load) is reduced, initially decided a fork carriage, which is one of the components that most from a decrease or increase in this

-13-

030607/0020

A 44 108 b

k - 176 - Iß - δ -

April 14, 1980

Distance is influenced and which is an indispensable component of a lifting element, to be removed from a position in front of the uprights or to be relocated to the rear. Thereafter, it was further decided to include the actuators for a device with a large operating weight in the space, the
is created by such a construction. The actuators, the lifting element, etc. have thus been rearranged in such a way as to successfully reduce the above-mentioned distance. In this way, the movement of the load center towards the body of the pallet truck successfully became itself
reached when the pallet truck was equipped with the device. As a result, not only can the forward view, in particular the visible area for forward operation from the driver's seat of the lift truck, be improved, but also the distance between the center of the front wheels of the lift truck and
the load center can be reduced, so that the allowable load to which the weight of the body of the
Lift truck forms the counterweight, can be increased, with a stability in the longitudinal direction of the lift truck can be promoted. The invention is described below with reference to in the accompanying drawings
illustrated embodiments explained. In the
Embodiments shown in the drawings
are the same or similar elements to achieve
of the same operation are denoted by the same reference numerals.

-14-

0306 0 7/0020

A 44 108 b / _n

k - 176 - IA- ^ -

April 14, 1980 /

Brief description of the drawings

Fig. 1 is a view of a first embodiment according to the present invention;

Fig. 2 is a side view of the same embodiment;

Fig. 3 is a perspective view of an essential part of the same embodiment;

Fig. 4 is a front view of the essential part according to FIG. 3;

Fig. 5 is a plan view of the same essentials Part, partly in section;

Fig. 6 is a schematic side view of an essential part of a variant of the embodiment according to FIGS. 1 to 5;

Fig. 7 is a perspective view of the essential part of the same variant;

Fig. 8 is a partial plan view of the same variant on average;

Fig. 9 is a schematic explanatory view showing an area in which the sight of is covered in front;

-15-

0 30607/0020

A 44 108 b

k - 176 - \ / - 40 -

April 14, 1980 /

Fig. 10 is a side view of a lift truck with a load lifting unit according to another Example of the invention;

11 is a perspective view of an essential part of the same embodiment. with some parts cut away;

Fig. 12 is a partial plan view of the essentials Part of the same embodiment, partly in section;

13 is a partial side view of a variant of the exemplary embodiment according to FIGS. 10 to 13 12, partly in section;

14 is a side view of a lift truck with a load lifting unit according to another another embodiment of the present invention;

^Λ Fig. 15 is a perspective view of the we

essential part of the same embodiment, with some parts cut away;

Fig. 16 is a front view of the essential part of the same embodiment;

-16-

030607/0020

A 44 108 b

k - 176 - 16 / -

April 14, 1980 ^/

Fig. 17 is a partial plan view of the same embodiment, partly in section; '"

Fig. 18 is a perspective view of the '

Main part of the same embodiment;

19 is a side view of a lifting wafer with a load lifting unit according to another Embodiment of the present invention;

Fig. 20 is a perspective view of the main part of the same embodiment. partly in section;

Fig. 21 is a front view of the main part of the same embodiment;

Fig. 22 is a partial plan view of the main part, partly in section;

23 is a side view of a lift truck with a load lifting unit according to a further exemplary embodiment of the present invention .

manure;

Fig. 24 is a front view of the main part of the same embodiment;

-17-

030607/0020

2953063

A 44 108 b

k - 176

April 14, 1980

Fig. 25 is a partial plan view of the main part of the same embodiment, partly in FIG Cut;

Fig. 26 is a side view of part of the same embodiment;

FIG. 27 is a partial plan view of that shown in FIG Part;

Fig. 28 is a side view of another embodiment of the present invention;

Fig. 29 is a front view of an essential part of the same embodiment;

Fig. 30 is a plan view of the essential part of the same embodiment, partly in FIG Cut;

Fig. 31 is a side view of a lift truck with. a load lifting unit according to another Embodiment of the invention, '

Fig. 32 is a view of an essential part of the same embodiment;

Fig. 33 is a plan view of the essential part of the same embodiment;

-18-

030607/0020

A 44 108 b

k - 176

April 14, 1980

- ι / - 43

Fig. 34 is a perspective view of the same essential part;

Fig. 35 is a side view of an ordinary lift truck with an articulated device Fork;

36 is a partial side elevational view of an articulated fork lift truck according to one embodiment further embodiment of the invention;

Fig. 37 is a partial plan view of an essential part of the same embodiment; with some parts cut away;

Fig. 38 is a rear view of an essential part of the same embodiment;

Fig. 39 is a side view of an essential part of the same embodiment;

Fig. 40 is a rear view of a variant of the we- ^

essential part of the embodiment according to FIGS. 36 to 39;

41 is a side view of a lift truck connected to a load lifting unit according to another Embodiment of the invention is equipped;

-19-

030607/0020

A 44 108 b

k - 176

April 14, 1980

Fig. 42 is a plan view, half in section, of an essential part of the same embodiment ;

Fig. 4 3 is a plan view - half in section of a variant of the embodiment that shown in Figs. 41 to 42, and

Fig. 44 is a similar plan view - half in section - of a variant of that in Figs Fig. 42 shown embodiment.

Best mode for carrying out the invention

Fig. 1 to 5 show an embodiment in which a pivotable bracket as a fastening for a load lifting unit a forklift is provided. In the figures, 1 denotes a pair of uprights, one of which each consists of an outer mast lol and an inner mast Io2. The outer masts lol are on the respective upper ends through an upper cross member Io3 and at the respective lower ends connected to a lower cross member Io4. The outer masts lol are through a body 2 to the rear and supported forwardly pivotable by means of a connecting bracket 22 and can be pivoted by means of a pivot connection

-2o-

030607/0020

A 44 108 b

k - 176 - 2JÖ - A5 -

April 14, 1980

be tilted back and forth between associated pivot cylinders 3 and brackets 23. on the other hand are the inner masts 102 at their upper and lower ends by an upper cross bar Io5 or a lower cross bar Io6 connected to one another and associated with the associated outer masts lol by means of Lifting rollers 5 can be moved up and down. Two lifting cylinders for lifting and lowering a lifting element 4, which consists of side plate members 18 and transverse plate members 19 are separated laterally from the arranged on the left or the right stand 1, in particular on the rear side of the relevant stand 1 (The lifting cylinders 7 can be arranged separately on the outside of the respective stand 1) and stand on the lower cross member Io4 of the outer masts lol. At the upper end of a piston rod 8 of each of the lifting cylinders 7 is a substantially U-shaped wheel mount 11 attached, via a sprocket 12, which is rotatable by means of an axis 13 of the wheel bracket 11 is supported, a lifting chain 14 runs on her one end is attached to the outer mast lol and at its other end to the lifting element 4. An im essential U-shaped receiving element 15, which "at the upper end of the associated inner mast Io2 or is attached to the upper cross bar Io5 Slidably fitted on the outside of the respective wheel mount 11. The receiving element 15 has elongated guide rails in its side walls

-21-

0 30 6 07/002 0

A 44 108 b

k - 176

April 14, 1980

slots 16 in which the axis 13 of the sprocket 12 can engage. This arrangement results for the lifting element 4 a free stroke which is determined by the length of the guide slots 16. In this It should be noted that there is a large free space between the left and the right stand 1 Gap 17 results because, instead of that which is usually arranged between the left and right stands 1 Lifting cylinder, two lifting cylinders are provided, which are arranged on the rear of the associated stand 1 are. In the space 17, the lifting element 4 and an actuating mechanism 25 are for a pivotable bracket arranged. The lifting element 4 is guided through the inner mast Io2 by means of lifting rollers 6, which are rotatably supported in the upper and lower parts of the side plates 18, respectively, and it becomes raised and lowered by the lifting cylinder 7. On the other hand, the operating mechanism 25 for a pivotable bracket on a rotor 26 which is provided with teeth along its circumference, an oil motor 27, a speed reducer 28 driven by the oil motor 27, and a pinion 29 for driving the rotor 26 at a low speed reduced by the reduction gear 28. The rotor 26 is rotatably mounted on the front transverse plate 19 of the lifting element 4, and the oil motor 27 and the like Reduction gears 28 are attached to the upper end of the lifting element 4. In front of the rotor 26 is a pair of arms

-22-

030607/0020

A 44 108 b ,

k - 176 - 2 / i -

April 14, 1980 /

provided from a left and a right bracket arm (not shown).

As mentioned above, according to an embodiment of the invention, the two lifting cylinders 7 are arranged separately on the rear of the associated stand 1, so that the lifting element 4 and the actuating mechanism 25 for a pivotable bracket are arranged in the space 17 between the left and right stands be able. In this way it is possible to bring the center of gravity for the load closer to the body 2 than in the known arrangement in which the above-mentioned elements are arranged in front of the stand. This improves the load capacity of a pallet truck. In addition, the field of view that is available when working from the driver's seat to the front is enlarged, since the operating mechanism 25 for a pivoting bracket can be placed closer to the body 2, ie ¹ , since the distance from the center of the front wheels Io to the front of the rotor 26 can be reduced. This contributes to an improved view to the front, since the disadvantages, which are present in the known arrangement, in which the fastened components are made thin, but have a large diameter in order to achieve the required load-bearing capacity, are avoided. In addition, the arrangement of the two lifting cylinders on the rear of the associated stand 1 also contributes to the fact that from the driver's seat

-23-

030607/0020

A 44 108 b k - 176

April 14, 1980

results in an improved forward view. Since the lifting cylinders 7 are arranged on the left and right, can In addition, stable operation can be ensured when working with a load even when on the pivoting bracket acts an uneven load.

In detail, various effects can be achieved with the lifting unit for a lift truck according to the invention achieve, for example, that the ability to lift loads is increased by the permissible Load of the load lifting unit is increased when a working device or a lifting tool on the unit is mounted that the stability of the entire vehicle is increased, and that from the driver's seat Forward visibility is improved. When the two lifting cylinders 7 are separated on the sides of the associated Stand 1 are arranged, in particular on the rear sides of the stand 1, then a construction according to a modified exemplary embodiment can be used for the load lifting unit may be used as shown in Figs. In the embodiment according to 6 to 8, the part of the load lifting unit which forms the stand has essentially the same structure as in the embodiment according to FIGS. 1 to 5. In the figures, two lifting cylinders 7 for lifting and Lowering the inner masts 1o2 and a lifting element 4, which is used for lifting and lowering along the inner masts can slide, and

-24-

0306 0 7/0020

A 44 108 b

k - 176 - 24 / -

April 14, 1980

consists of side plates 18 and transverse plates 19, arranged on the rear of the associated stand 1, preferably in an area which is located behind the stands 1, so that the driver can look after is not further impaired at the front. The lower ends of the cylinder 7 are on the lower cross member Io4 mounted, which is provided at the lower ends of the respective outer masts lol, namely in positions within spaces 3o, which by rear flanges of the stand 1, a front axle 9 and Front wheels Io can be defined. The scope of the lower The end region of the lifting cylinder 7 is encompassed by a bracket 31 which is designed in the form of a housing and with a flat area Io7, a rising area Io8 of the lower cross member Io4 and the rear one The flange area of the outer mast lol is welded.

On the other hand is a substantially U-shaped wheel mount 11 attached to the upper end of a piston rod 8 provided on each of the lifting cylinders 7 is. A lifting chain 14, which at one end to the outer mast lol and at another end to the Lifting element 4 is attached, runs over a chain wheel 12, which is rotatable by means of an axis 13 in the wheel holder 11 is supported. Identical to the previous example: the relevant inner mast Io2 or an essentially U-shaped receiving element on an upper cross bar Io5 15 slidable on the wheel mount 11

-25-

030607/0020

A 44 108 b / C \ f \

k - 176 - 2JT - TO

April 14, 1980

fitted. The receiving element 15 has elongated guide slots 16 in side walls of the element 15 are provided, and in which the axis 13 of the sprocket 12 can engage. Thus it results for the Lifting element 4 is a free stroke which is determined by the length of the guide slots 16. On the other hand, can a construction can be used in which instead of the U-shaped receiving element 15, an elongated Guide rod is used, which is at one end is attached to the upper cross bar Io5, while a vertical slot is provided in the wheel bracket 11 is / in such a position that it is flush with the rod, so that the slot the rod Can receive slidably so as to ensure a free stroke of the lifting element. Connection bracket 22 for connecting the body of the lift truck and the stand part are pivotable on the front axle 9 and rigid at the respective front ends of the Bracket 31 attached (or on the rear flange areas of the outer masts lol). The stand 1 can be tilted forwards and backwards with respect to the axis of the front axle when the tilt cylinder is actuated (which are identical to the tilt cylinders 3 shown in Fig. 2). As from the previous Description becomes clear, due to the fact that the two lifting cylinders are separate from each other are arranged behind and to the side of the relevant stand 1, the components of

-26-

030607/0020

A 44 108 b / η.

k - 176 - 2 ^ - 14

April 14, 1980

Load lifting unit, which otherwise has a clear view would obstruct forward from the driver's seat of the vehicle, be arranged in a different way, forward visibility is improved. This has the consequence that the loading of the attached lifting tool (in Fig. 6 an ordinary fork) is greatly improved, and that signs or obstacles in working can be seen at a glance with the pallet truck. Also, because of the improvement in terms of Work efficiency and stability reduce operator fatigue.

Since the lifting cylinders 7 are arranged symmetrically on the rear of the associated stand 1, and there their lower ends are arranged at the same level as the lower ends of the stand 1, the Center of gravity of the entire load lifting unit in the direction Moved to the front axle 9, which increases the stability of the whole vehicle, and the piston stroke each of the piston rods 8 may suitably according to the length of each of the inner masts Io2 be adjusted to provide a length of the stand sufficient to accommodate the lifting and lifting required To cause lowering of the lifting tool, and to be able to select the extent of the free stroke as desired.

When the two lifting cylinders 7 are arranged separately behind and to the side of the associated uprights 1

-27-

030807/0020

A 44 108 b k - 176

April 14, 1980

are, then they can also advantageously be arranged behind an area D, which is always in front of the respective inner mast Io2 through the inner one Masts Io2 results, as shown in Fig. 9, so that the diameter of each of the lifting cylinders 7 is freely selected can be if the lifting cylinders 7 can be arranged behind the areas D. So if lifting cylinder 7 with a diameter as large as possible will be used then the ability for lifting loads greatly increased. Since the lifting cylinder 7 not only in the vicinity of the associated inner Masts Io2, but also in the vicinity of the lifting element 4, which can be arranged with these masts is in engagement and is slidable with respect to these masts, and since in the sprockets 12 the at the upper ends of the respective piston rods, which protrude from the lifting cylinders 7, each chain wheel its circumference has a lateral inner end which is opposite the lifting element 4 and substantially is arranged above and close to the connection point of the lifting element 4 and the chain, is also ensures that a load can be exerted on the center of the piston rods concerned. As a result, the occurrence of unbalanced loads is reduced, an effective lifting force is exerted, and the packings fitted to the cylinders and pistons can be protected. Since the The circumference of the lifting cylinder does not protrude outward beyond the outside of the outer mast, the

-28-

A 44 108 b

k - 176

April 14, 1980

Inside of the front wheel can also be placed very close to the outside of the outer mast. It there is therefore no need to increase the width of the car, and there is also no risk of that the cylinders collide with obstacles.

As a modified embodiment of the first embodiment, as described above and shown in FIGS. 1 through 5 is hereinafter referred to 10 to 12, a further embodiment is described in which a rotatable actuating mechanism for a rotary type lifting tool disposed at the rear of a finger rod of a lifting element is. In the embodiment according to FIGS. 10 to 12, a left and a right stand 1 are lifting cylinders 7, etc. are constructed and arranged in the same manner as in the aforementioned first embodiment. Accordingly, the relevant details are not repeated here and only the characteristic structures and operational Effects which are characteristic of the embodiment under consideration will be described.

In a space 17 between a left and a right stand 1 because of the separate arrangement formed by two lifting cylinders 7 behind the respective uprights 1 is a side plate element 18 arranged from a pair of side plates with a left and a right side plate 2o, wherein

• 29-

03060770020

A 44 108 b

k - 176

April 14, 1980

a lifting roller 6 is rotatably supported on each of the side plates 2o in the upper and lower areas of the same is. In addition, a transverse plate 21 is cross-attached to the front portions of the side plates 2o. The side plate member 18 can be raised and lowered by the lift cylinders 7 while it is guided from the inner masts Io2 through the lifting rollers 6. At the front of the one in front Cross plate 21 of side plate member 18 is a rotary operating mechanism 25 for a lifting tool (not shown) such as a rotatable fork or bracket is provided. Below the rotary operating mechanism 25 will be described in more detail. As shown in Fig. 12, there is the rotary operating mechanism 25 mainly consists of a rotor 26, an oil motor 27, a reduction gear 28 (including a change mechanism for a drive shaft position) which is driven by the oil motor 27 is, and a pinion which is fitted to the shaft end of the reduction gear 28 and suitable is to rotate the rotor 26 at a reduced low speed. The rotor 26 is at the front attached to the cross plate 21 of the side plate member.

A drive part 32 on the oil motor 27 and the reduction gear 28, which are horizontally above the rotor 26 in the usual Way arranged is on the back

-3o-

030607/0020

A 44 108 b s

k - 176 - Ζ / -

April 14, 1980

of the front transverse plate 21 arranged within the space 17. In detail is the reduction gear 28, as shown in Fig. 11, directly connected to the oil motor 27 at its rear side and arranged vertically and attached to the rear of the front cross plate 21 by means of bolts.

If the rotor 26 has a toothed wheel with internal teeth, then the reduction gear 28 with the oil motor 27 and with the pinion 29 fitted onto its shaft end can be fastened to the rear side of the front transverse plate 21 by means of bolts in the same way as described above. This modification is shown partially in section in FIG. As is clear from the foregoing description, one adjusts the driving devices in the intermediate space between the left and right stand characterized an that one drive means, such as the oil motor and the reduction gear of the Drehbetätigungsmechahismus _/ placing of the lifting element at the rear of the front transverse plate. This improves the forward view from the driver's seat of the lift truck, and the drive devices, such as the oil motor and the reduction gear, are advantageously protected by the transverse plate, the stands, etc. so that they are not hit by a load and are not subject to damage if the cargo drops accidentally.

-31-

030607/0020

A 44 108 b

k - 176

April 14, 1980

A lift truck on which a fork arrangement of the so-called stand-out type on the load lifting unit according to a Another embodiment of the present invention is attached, will be explained below with reference to Fig. 14 to 18 described.

Generally, the fork assembly is of the pop-out type very thick and heavy, and when it is attached to the load lifting unit then the location of the center of gravity becomes moved forward when loaded with respect to the body of the pallet truck. Because of this, I can't only the permissible load of the pallet truck can be greatly reduced, but also the longitudinal stability of the truck itself, causing a considerable deterioration in the performance of the car will. The present invention ameliorates such tendency.

In Fig. 14 to 18 is a pair of stands from a left and a right upright 1, each of which consists of an outer mast lol and an inner mast Io2, designed so that the outer masts lol at their respective upper ends by an upper cross member Io3 and connected at their lower ends by a lower cross member Io4, the uprights 1 on their lower ends are tiltable forwards and backwards by a front end of a body 2 and are suitable are to be tilted back and forth by tilt cylinder 3 while the inner masts Io2 at

-32-

030607/0020

A 44 108 b

k - 176

April 14, 1980

their respective upper ends and at their respective lower ends are connected by an upper cross bar Io5 and a lower cross bar Io6 and with respect to the outer masts lol through assigned.Hubrolle 5 are movable up and down in the same way as in the previous examples. Two lifting cylinders 7 for lifting and lowering a lifting element 4 are arranged in positions on the back of the respective stands 1 (they can alternatively in places on the outside of the respective stand

I be arranged), and arranged so that they are on the lower cross member Io4 of the outer masts lol. A substantially U-shaped wheel holder

II is at an upper end of a piston rod 8 each the lifting cylinder 7 attached. A chain wheel 12 can be rotated on the wheel holder 11 by means of an axle 13 held. A lifting chain 14 which is attached at one end to the outer mast lol and to its other end to a chain anchor pin 34, "the protruding from the rear of the lifting element 4 is placed over the sprocket 12. A substantially U-shaped one Receiving element 15, which is located on the upper end of the inner mast Io2 or on the upper cross bar Io5 is attached, is slidably adapted to the outside of the wheel mount 11. The receiving element 15 has perpendicular guide slots 16 which are provided in corresponding side walls of the same are. As a result, a free stroke is specified for the lifting element 4, which is determined by the length of the

-33-

03060 7/002 0

A 44 108 b /

k - 176 - 3X-

April 14, 1980 ^/

Guide slots 17 is determined. The arrangement at which the two lifting cylinders 7 are arranged on the back of the respective stand 1, leads to a considerably large gap between the left and right stands 1. A fork assembly from The type of display, which will be discussed later, is arranged in the space.

A pop-out type fork assembly attached to the lifting element 4 is explained in detail below.

In FIGS. 14 to 18, the number 6 denotes Kub rollers, which are rotatable on opposite sides of the lifting element 4 are rotatably mounted in the lower areas of the same by means of pins 35. 36 denotes a first connecting shaft which is mounted above the lifting element 4 by means of bearings 37. 38 denotes first Connecting elements that form a pantograph-like unloading or display mechanism, and the ah their respective inner portions are pivotally connected to the ends of the first connecting shaft 36 are and carry rotatably mounted rollers 4o at their respective outer ends. 41 denotes second Connecting elements that form the display mechanism, and each of which in a central part thereof with a central part of the associated first connecting element 38 is connected by means of a pin 42 such that the connecting elements are relatively are pivotable to each other. Besides, every second is

-34-

030607/0020

A 44 108 b

k - 176 - 3 / T -

April 14, 1980

Connecting element 41 pivotable with a rear inner region thereof with a second connecting axis 43 connected and carries at a rear outer end one by means of a pin 44 rotatable mounted roller 45.

On the other hand, caster rollers 47 are rotatable on the front and inner portions of the first link members 37 fastened by means of pin 46. The front ends of the second connecting elements in question 41 are pivotally connected to brackets 49 by means of pins 5o, which are attached to the rear of a lower finger bar 48 attached, are. 51 denotes display rails, which at their front ends on the Rear of an upper fork carriage 52 and attached to the rear of a lower fork carriage 48 and which receive in their interior the rolling rollers 47, which are rotatable at the relevant front ends of the first Connecting elements 38 are attached. Io9 and Ho are brackets that are attached to central parts of the second connecting axis 43 or to the lifting element 4 are. An opening cylinder 55 is pivotable by means of a piston rod part thereof a pin 53 with the bracket Io9 and on a base part of the same by means of a pin 54 pivotable with it connected to the bracket Ho.

57 is a fork attached to the upper and lower fork carriages 52 and 48, respectively. The rolling rollers

-35-

0 3 0607/0020

A 44 108 b /

k - 176 - )% -

April 14, 1980 '

and 45 and the lifting roller 6 are received by the inner rail Io2. When actuating the lifting cylinder 7, the lifting element 4, the first and second connecting elements 38 and 41, the rails 51 and the upper and lower fork carriages 52 and 48 are raised and lowered together. When the opening cylinder 55 is actuated, the rolling rollers 45 move in the direction of the relevant rolling rollers 4o in the relevant masts Io2 to or away from these, so that the opening rails 51 and the upper and lower Fork carriage 52 or 48 are moved forward away from the body or towards the body. In this way, the fork 5 causes 3 deployment and return movements in front of the lift truck.

As can be seen from the above-mentioned arrangement, the focus of the Gahel arrangement is the one that can be opened out closer to the body, since the lifting cylinders 7 are arranged separately from one another laterally, especially behind den and to the side of the respective uprights, each consisting of the inner mast Io2 and the outer mast lol exist, so that the lifting element 4 of the load lifting unit lies in the space 17 between the left and right stands, and because also the entire Lifting tool assembly with the openable fork can be moved close to the body 2 when they is mounted. As a result, the center of gravity in a load is compared to a conventional arrangement, in which the fork carriage and a fastening in front of the

-36-

030607/0020

A 44 108 b

k - 176

April 14, 1980

- γ / - ΙΛ-

Stands are arranged, moved closer to the body. As a result, there may be a reduction in the allowable Load caused by the lifting tool can be effectively avoided and the load capacity of the forklift and the stability of the same are improved. There is also the distance between the central axis of the front wheels and the front end of the opening rail 51 can be reduced can, the view from the driver's seat to the front can be improved compared to the known construction. Furthermore, since the lifting cylinders 7 are arranged symmetrically, the stability against an unbalanced Load to be improved.

Although the first connection axis 36 is considered in the Embodiment is mounted on the lifting element 4 by means of bearings 37, on the other hand, an arrangement can be used in which short stub axles are attached to the sides of the lifting element 4, and at of the first connecting elements 38 at their respective rear ends are pivotably connected to the stub axles. The present invention can also be realized in a slide assembly equipped with a deployment mechanism, and not only in connection with an openable fork arrangement according to the embodiment under consideration.

19 to 22 show a further embodiment in which an openable fork arrangement, as in the

. -37-

030607/0020

A 44 108 b

k - 176

April 14, 1980

the embodiment considered above, is attached as a lifting tool to the load lifting unit. Out For this reason, an explanation of those structural elements that are similar to the embodiment 14 to 18 are omitted, and only the characteristic ones are used Design features and operating conditions are described that are typical of the further exemplary embodiment are.

In FIGS. 9 to 22, a lifting element 4, which forms part of the load lifting unit, is on the rear sides a pair of rails consisting of a left and a right rail 58 attached in the lower region of the same. A connecting web 6o connects the middle areas the rear of the rear rails 58. The rear rails 58 can be combined with the Kubelement 4 are raised and lowered by the lifting cylinder 7 concerned, while they are of the concerned inner masts Io2 are guided by lifting rollers 6, which are on their outer sides in an upper and a are rotatably mounted in the lower area.

A pair of rails consisting of a front left and a front right rail 59, each channel-shaped are formed is provided in front of the rear rails 13. The front rails 59 are toward a longitudinal axis of the lift truck with respect to the rear rails 58 with the aid of a deployment mechanism

-38-

030607/0020

A 44 108 b /

k - 176 - ZJf-

April 14, 1980 /

movable forwards and backwards. In detail, a right and a left stand are on the inside 1 pairs of connecting elements 38, 41 arranged, the connecting elements of each pair in their central areas are connected to one another by means of a connecting pin 42. The pair of Connecting elements 38 and 41 form the deployment mechanism. The connecting elements 38 on the Outside of the connecting elements 41 are arranged, are at their respective lower ends by means Pins 62 are pivotally connected to corresponding support members 61 from the front of the lifting member 4 stand out, and carry at their respective upper ends rolling rollers 64, which by means of support axles 63 are rotatably mounted. The caster rollers 64 are received by the corresponding front rails 59. On the other hand, the connecting elements 41 are located on the inside of the connecting elements 38 are pivotally connected at their respective lower ends to support members 65, which from the rear of a fork carriage 52 which connects and supports the front areas of the front rails 59 also roller rollers 68 which are rotatably mounted by means of axles 67. The rolling rollers 68 are assigned by the associated rear rails 58 added. The upper ends of the respective connecting elements 41 are with the middle part of the connecting axis 5o of the deployment mechanism via a connecting element 7o with a free end of a piston rod 56 one

-39-

030607/00 2 0

A 44 108 b

k - 176

April 14, 1980

Extension cylinder 55 connected, which is attached to the front of the lifting element 4 by means of a bracket Ho and a pin 69 is attached. For this reason, when the opening cylinder 55 is operated, it becomes stretched or to contract the deployment mechanism, the front rails 59 moved back and forth. One Fork 57 is mounted on fork carriage 52. In the embodiment under consideration with the above the arrangement described are the rear rails 58, as shown in Fig. 22, in associated inner Masts Io2 are mounted within a space 17 between a left and a right stand 1 in such a way that that the entire arrangement or the entire lifting tool with the openable fork arrangement is mounted in such a way, that it is close to a body 2o. The center of gravity of the lifting tool is consequently close in the body 2, so that an increase in the permissible load becomes permissible. The resilience and the Longitudinal stability of a pallet truck is thus improved,

In addition, due to the fact that the distance between the central axis of the front wheels Io and the front end of the front rail 59 can be reduced, from the driver's seat the view forward in the Improved compared to the known construction. It is also because of the separated and symmetrically arranged Lifting cylinder 7 improves the stability against an unbalanced load on the fork.

-4o-

0 30607/0020

A 44 108 b

k - 176

April 14, 1980

23 to 27 show yet another exemplary embodiment, in which the invention in a lift truck with an openable fork arrangement as a lifting mechanism, stuff is realized. The essential parts of this embodiment are described below.

In the embodiment under consideration, instead of a single lifting cylinder between a left and a right stand 1 is arranged in the usual way, on both sides at Left and right column 1, in particular on the back of the stand 1, cylinder is provided. Therefore, a space 17 and a lifting element 4 are obtained between the left and right stands 1 and an extendable fork assembly are disposed in the space, as detailed below will be described. The lifting element 4 is made on the rear lower areas of a pair of rails left and right rear rails 58th attached. A connecting web 6o connects the rear sides of the respective rear rails 58 in the central area of the same. The rear rails 58 can be raised and lowered by appropriate lifting cylinders, while they are from relevant inner> Masts Io2 are guided by lifting rollers 6, which are rotatable on the upper and lower areas of the outer surfaces of the respective rear rails 58 are mounted. A pair of rails consisting of a left one and one right front rail 59, which is channel-shaped

-41-

030607/0020

A 44 108 b /

k - 176 - A / -

April 14, 1980 /

is disposed on the inside of the respective rear rails 58. The front rails 59 are along a longitudinal axis of a lift truck with respect to the rear rails 58 by means of a pantograph mechanism movable back and forth in the same way as in the previous example. Specifically, four connecting elements 38 and 41, which form a joint mechanism, are arranged in such a way that that pairs of connecting elements are formed in which the connecting elements on the right or left side are pivotally connected by means of connecting pins. The connecting elements 38, which on disposed on the outsides of the connecting members 41 are also at their respective lower ends pivotally connected by means of pins 62 to corresponding support elements 61, which from the rear sides of the lower fork carriage 48 protrude and carry at their respective upper ends rolling rollers 68, the are rotatably mounted by means of axes 67. The caster rollers 68 are driven by the associated rear rails 58 recorded. On the other hand, the connecting elements 41 lying on the inside are on their respective ones lower ends bent inwards and pivotally connected by means of pins 72 to support plates 71, the protrude from the rear of the lifting element 4 at a left and a right position. The fasteners 41 also carry rolling rollers 64 at their respective upper ends, which by means of axles 63 are rotatably mounted. The rolling rollers 64 are of

-42-

030607/0020

A 44 108 b k - 176

April 14, 1980

-Υ- V

the associated front rails 59 received. The lower ends of the relevant connecting elements 41 are connected to a connection axis 73, and the connection axis 73 in a deployment mechanism is by means of a pin 74 and a bracket 75 with a free end of a piston rod 56 of an opening cylinder 55 connected, which is in the middle of the front part of the lifting element 4 by means of a bracket Ho and a pin 111 is mounted. Therefore, by operating the extension cylinder 55 to stretch and contract of the opening mechanism, the front rails 59 can be moved forwards and backwards.

In an arrangement of the type mentioned above the rear rails 58 are mounted in the associated inner masts Io2, while the front rails 59 are mounted in the rear rails 58 so that the entire deployable fork assembly is arranged can that it is arranged close to a body 2. This makes it possible to focus the bring the openable fork assembly closer to the body, and also the point of application for the load closer to the body 2 than in the known arrangements in which a Gabelwaaen and a lifting tool are arranged in front of a mast. As a result, the allowable load can be reduced due to the presence of the lifting tool can be effectively avoided while the load capacity and the '■ longitudinal stability of the pallet truck can be improved.

-4 3-

0 30607/0020

A 44 108 b

k - 176

April 14, 19Sun

In addition, the front view from the driver's seat is improved compared to the known construction, since the distance between the center axis of the front wheels and the front end of the front rails 59 is reduced
are arranged symmetrically and separately, the
Stability against an unbalanced load can be improved.

28 to 30 show a load lifting unit which uses a fork arrangement with a winch as a lifting tool and which represents a further exemplary embodiment of the invention. At this point, a lift truck is to be considered, which is equipped with a fork arrangement with a conventional winch. Load lifting components, such as a lifting cylinder, a chain, etc. for raising and lowering a lifting element, are in a central area between a left and a
arranged right uprights standing on the front part of a body, and winch devices with a winch drum for a winch device, with an oil motor and with a reduction gear are arranged in front of the uprights so that they do not interfere with the work of the load lifting components. In detail, a forwardly projecting arm of a winch arm is attached to a central part of the lifting element. When an operator lifts a load while watching the load being held by the winch assembly
or hangs on the front ends of a fork,

-44-

030607/0020

A 44 108 b /

k - 176 - 44 -

April 14, 1980 /

which is provided on the front of the lifting element then consequently affect the load lifting components and the winch devices, such as the lifting cylinder and chain, which are located in front of the driver's seat, forward view from the driver's seat, which increases the possibility of effective lifting the load will be worsened. It is also dangerous because of the poor visibility ahead to drive such a pallet truck.

A load lifting unit for a lift truck according to the exemplary embodiment under consideration offers a solution for these problems. This will be described in detail with reference to FIGS. 28 to 30. There a construction a stand arrangement with a separate arrangement of the Lifting cylinder similar to that in the previous examples, only the essential elements are shown of the exemplary embodiment under consideration are described in detail.

In the figures there is a lifting element 4 with a side plate pair of a left and a right side plate element 18, with lifting rollers 6, which are rotatable on upper and lower areas of the respective side plate elements 18 are arranged, and with transverse plate elements that transversely at the front ends of the respective Side plate members are attached, arranged in a space formed between a left and a right stand 1. The

-45-

. 030 6 07/0020

A 44 108 b

k - 176

April 14, 1980

Lifting element 4 can be raised by means of two lifting cylinders 7 and lowered while being guided by inner masts Io2 by means of the elevating rollers 6.

The lifting element 4 is provided with a winch device 76 and a fork 57. In this relationship exists the winch device 76 mainly consists of a winch arm 77, a winding area 82 with a Winding drum 79 for winding a cable 78 around its circumference, from an oil mctor 81, which is connected to the winding drum 79 is connected via a reduction gear 8o, and from guide rollers 83 for guiding the running Cable 78. As shown in Figures 29 and 3o, the base of the winch arm 77 is at the front of the front one Transverse plate element of the lifting element 4 is mounted. The winch arm 77 has guide rollers 8 3 on one protruding, pointed area, as well as a bent back area. The winding drum 79 is rotatable held in a bracket 84 which is attached to the rear of the front transverse plate element 19 is attached, and carries a worm gear on a shaft end belonging to it 85 - element of the reduction gear 8o. The oil motor 81 is also at the rear of the transverse plate member 19 mounted like the winding drum 79 and carries a shaft end belonging to it Worm 86 - element of the reduction gear 8o. Due to the interaction of worm 86 and worm wheel 85, the winding drum 79 can be driven at a reduced speed.

-46-

030 6 07/0020

A 44 108 b

k - 176

April 14, 1980

As is clear from the above description, the two lifting cylinders 7 are in the embodiment under consideration arranged on the back of the left and the right stand, and the lifting element as well as the winding area with the winding drum, the reduction gear and the oil motor are in the room arranged between the uprights in such a way that the winding area is on the rear side of the transverse plate element located within the gap. This way, from the driver's seat, there won't be just one A better view to the front is achieved, which enables more effective work when lifting loads, but also an arrangement of the winding area, which is closer to the lower part of the body, which increases the longitudinal stability of the lift truck is improved. So there is an excellent effect insofar as the Pallet truck can be driven safely with a view to improving forward visibility.

31 to 34 show a further embodiment in which the invention in a load lifting unit for a lift truck is realized which has a laterally displaceable fork as a lifting tool. The essential Features of the embodiment and the particular operation thereof are described below.

In the load lifting unit according to the invention, there are two lifting cylinders 7 for lifting and lowering a lifting element

-47-

0306 07/0020

A 44 108 b k - 176

April 14, 1980

arranged in rear and side positions with respect to a left and a right upright 1 (they
can be arranged outside the stand 1) and
stand on a lower cross member Io4 from the outside
Masts lol. A space 17 is formed between the left and right stands 1. The lifting element 4 is arranged in this intermediate space 17. The
As shown in FIG. 34, lifting element 4 consists mainly of a pair of side plates with left and right side plates 18, each on
their outer side rotatably supported lifting rollers 6, from an upper and a lower rear Ouerplatte 21 'between the respective side plates 18 and from a front transverse plate 21, which is firmly connected to the lower front areas of the respective side plates 18. The lifting element 4 also has a horizontal axis 88 as an upper guide element, which slidably carries a fork bracket 91, and guide rollers as lower guide elements, which are arranged laterally rotatable at the left and right ends of the front transverse plate 21
and receive the lower rear of the fork bracket 91. The lifting element 4 can thus be raised and lowered with the aid of the above-mentioned lifting cylinders 7, while it is guided by the lifting rollers 6 through the inner masts Io2.

A fork 57 is at the front of the fork yoke
91 attached.

-48-

306Q7 / ÖÖ2Q

A 44 108 b

k - 176

April 14, 1980

The fork yoke 91 will now be described in more detail below. As Fig. 34 shows, the fork bracket 91 consists of an upper fork beam 92 and a lower fork beam 92, the two Fork beams in one piece at their opposite ends via a left and a right connecting rod 9 3 are connected to each other. There is also a retainer at the rear of the upper fork arm 92 94 attached, which engages around the horizontal axis 88 of the lifting element 4, and it is a Stop 87 attached to the upper end of the lower fork beam 92, which with the upper end of the front Transverse plate 21 of the lifting element 4 is engaged to prevent vibrations fore and aft. The fork bracket 91 can be moved laterally with respect to the lift truck with the aid of a sliding cylinder 9o be, wherein the sliding cylinder 9o has a cylinder head and a piston rod end, which are attached to the Inside of the side plate 18 of the lifting element 4 and supported pivotably by an end region of the holder 94 are.

As is clear from the arrangement described above, the lifting element is arranged in the space, by attaching the two lifting cylinders 7 to the rear of the associated left and right Stand is formed, and the actuation mechanism, which the guide elements for guidance during the sliding displacement of the fork bracket of the laterally movable

-49-

030607/0020

Λ 44 108 b k - 176

April 14, 1980

Having fork arrangement and a hydraulic cylinder is also arranged in this space. When As a result, various excellent improvements are achieved by using the Forward visibility is improved, thereby increasing the effectiveness of lifting loads, and by possible damage to the sliding cylinder due to direct contact with a load to be lifted, if it collapses or falls, is avoided. Also, the distance between the back of the fork bracket and the front of the stand are decreased, thereby increasing the load is made possible because the holder is arranged on the back of the fork bracket in the space.

35 to 39 show, as a further embodiment of the invention, a load lifting unit for a pallet truck, who uses an articulated fork as a lifting tool. In general, an arrangement with is articulated attached fork is extremely heavy because it has an actuating mechanism such as a cylinder assembly for pivoting a fork element about a horizontal axis. Because of this, the point of application of the load with respect to the body of the lift truck moves forward when an arrangement is attached to the front part of the body with an articulated fork. This has the consequence that the permissible load, namely the loading capacity of the lift truck, is considerably reduced, and that the

-5-

030607/0020

A 44 108 b

k - 176

April 14, 1980

A 44 108 b / /,

k - 176 - 5 / - f 5 "'

April 14, 1980 /

Longitudinal stability of the pallet truck is deteriorated, which prevents optimal performance of the truck. The present The invention is now intended to avoid these disadvantages. The main structural and functional features of the embodiment according to the invention are described below.

In the exemplary embodiment under consideration, there are two lifting cylinders 7 on the rear of the associated uprights 1 arranged so that there is a considerable gap 17 between the left and right stands. . '

A hinged fork arrangement H is
provided with a support element 124 for the load, which is held in front of a lifting element 4 and can be raised and lowered along the stand 1. The lifting element 4 consists of two side plates 18, which are arranged parallel to the uprights 1, and a basin plate 2o which connects the upper ends of the side plates 18 in question. The lifting element 4 is in the
Intermediate space 17 arranged, with lifting rollers that are attached to
the outsides of the respective side panels 18 are supported slidably by the respective inner ones
Masts Io2 are recorded. On the lower areas
of the relevant side plates 18 of the lifting element 4
is a pair of bracket members 95 arranged so that
these protrude forward. At the front ends of the
relevant bracket elements 95 is the rear part

-51-

030607/00 2 0

A 44 108 b / hi

k-176 - 54 - "0"

April 14, 1980

a fork carriage 92 ', which forms part of a support element 124, by means of an axle 125 in this way attached that pivoting movements of the same are made possible up and down.

The support element 124 consists of the fork carriage 92 ', a fork 57, which depends from the fork carriage 92 *, and a rear stop 97, which of the fork carriage 92 * is carried. At opposite ends of the fork carriage 92 'arms 96 are provided in such a way that that they stand up. The lower part of the rear stop 97 is pivotally supported substantially in the center of the arm 96, and the upper one Area of the arm 9 6 is supported against the back of the rear stop, so that a pivoting movement of the rear stop 97 is only allowed to the front. A stop spring 98 is with her anchored one end to a suitable location on the rear stop 97 and the other end on a spring arm 99 which protrudes from the fork carriage 92 '. The cover plate 2o of the lifting element 4 is in its middle part is provided with a cylinder bracket loo, on which the base-side end of a tilting cylinder 12o is pivotally supported. A piston rod 121 protruding from the tilt cylinder 12o is on its one end connected to a piston rod yoke 122 which extends rearward from the rear of the fork carriage 92 ' sticks out. When the tilt cylinder 12o is actuated, the fork carriage 92 ′ can pivot about a pivot axis 125

030607/0020

A 44 108 b

k - 176 - SX -

April 14, 1980

will. In the figures, on the back of the upper part of the rear stop 97 is a stop attached, which can be supported on the cover plate 2o to avoid excessive movement of the rear To prevent stop when the fork carriage 92 'is tilted back and the rear stop 97 after is moved back.

As stated above, the embodiment under consideration is constructed so that two lifting cylinders 7 on the rear associated stand 1 are arranged, each of which consists of an inner mast Io2 and a outer mast lol, so that there is a gap 17 between the left and right uprights results. In addition, the lifting element, which corresponds to a conventional tilt cylinder bracket, is in front of a Stand is arranged, arranged in the space, and also the lifting element is designed so that it carries lifting rollers 5 on its side parts, which are in engagement with the inner masts Io2, and that it carries the supporting part of the pivotable fork on its front part, and that it carries on its upper part the tilt cylinder 12o carries, so that the support element 124 for the load, which with the arrangement H with articulated fork is equipped as close as possible in front of the stand 1. Therefore, the Loading capacity of the pallet truck can be increased. In addition, due to the fact that the entire arrangement II with an articulated fork closer to the

-53-

030607/0020

A 44 108 b /.Λ

k - 176 - sar - if ο

April 14, 1980 '

Body 2 is arranged, the distance between the central axis of the front wheels and the rear stop 9 7 can be reduced. In addition, the view of the tip of the fork from the driver's seat can be improved and the operation of the fork can be facilitated, since the lifting cylinder 7 at the rear of the associated Mast assemblies 1 are arranged.

In addition, since the lift cylinders 7 are arranged to be left and right, one is not balanced load also ensures a stable load lifting operation, and since the lifting cylinder 7 and a Line element (not shown) against obstacles or objects that are in front of the Kubwagen fall, are protected, oil leakage or damage to the cylinder rod 10a be avoided.

Although the explanation is based on an exemplary embodiment takes place in which a tilt cylinder 12o is provided to the arrangement H with an articulated fork to actuate, wherein the tilt cylinder 12o is attached to the central part of the lifting element 4, the tilt cylinder 12o removed and replaced by two separate cylinders spaced from each other and attached to the Sides of the lifting element are arranged to further the view to the front in the central region of the lifting element 4 to improve.

-54-

030607/0020

A 44 108 b k - 176

April 14, 1980

41 to 43 show still another embodiment in which the present invention is applied to a Load lifting unit for a lift truck is realized, in which the lifting tool has a stabilizer arrangement for the load.

In general, pallet trucks equipped with a stabilizer assembly are equipped for the load, a front end of a lifting element in one piece, starting from the body of a pallet truck, extended to the front by a space for the assembly of guide elements and to obtain a stabilizer which is part of a stabilizer arrangement for the Load forms between the back of a fork carriage and uprights. In particular it becomes a couple of guide elements from a left and a right Guide element, which form part of the stabilizer assembly for the load, attached so that it is located on the back of the fork carriage> and a stabilizer cylinder is attached so that it is centrally located on the rear of the fork carriage is. For this reason, a fork lift truck is equipped with a stabilizer arrangement for the load is, the fork carriage inevitably in front of the body, resulting in a considerable reduction with regard to the permissible load with a load.

-55-

030607/0020

A. 44 108 b / k - 176 - 5Ä - 14th . April 1980 /

In the embodiment under consideration, a load lifting unit is realized which is different from the above mentioned disadvantages is free.

The essential structural and functional effect of the exemplary embodiment is described in detail below described, however, for the sake of simplicity, no reference is made to a construction which similar to that discussed above.

In Figs. 41 and 42, lift cylinders 7 are arranged on the rear of a left and a right stand 1, respectively (They can also be arranged on the outside of the stand) and stand on the lower cross member Io4 of the outer masts lol to make a room 17 in one Form an area defined between the left and right uprights 1. Sprockets 12 are through Piston rods 8 of the relevant lifting cylinders 7 at the outer ends of the same by means of wheel mounts 11 rotatably supported. A chain 14 which is attached at one end to the rear of the outer mast lol is, is fitted around the sprocket 12 with a middle section. Side plate members 18, which form part of a lifting element 4, which can be raised and lowered along the stand 1, are rotatably fitted into associated inner masts Io2 by means of lifting rollers .6 and have at the front ends a fork carriage 48, which is also part of the

030607/0020

A 44 108 b / _c

k - 176 - S / - J Λ -

April 14, 1980

Forms lifting element and is arranged in front of the uprights 1. 34 denotes chain anchor pins that are attached to the rear of the respective side plate members 18 are provided, and the opposite ends of the chains 14 are attached to them. A stabilizer arrangement for the load is attached to the lifting element 4. The stabilizer arrangement for the load comprises a load stabilizer device A with a clamping plate 131, Arm elements 129 and pillars 123 and guide elements 126 for supporting the stabilizer device A and for Control of raising and lowering the same and stabilizer cylinder 127.

The guide element 126 and the cylinder 127 are open the inside of the associated side plate elements 18 in a space 17 between the uprights 1 so arranged, that they are aligned lengthways. The arm member 129, which extends forward and substantially extends horizontally, is attached with its base to the 'upper end of the column, which in a guide part of the guide member 12 6 is fitted for raising and lowering, and pivotally supports the clamp plate 131 at the tip of the arm member 129 by means of a pin 13o.

132 is a connecting member that has its tip with the base of the arm member 129 and with its base is connected to the tip of a piston rod of the stabilizer cylinder 129. 133 and 134 are

-57-

030607/0020

A 44 108 b / ra

k - 176 - yi - bl

April 14, 1980 /

reinforcement elements connecting the arm elements 129, and 57 is a fork engaged with fork carriages 48 and 52.

When in the lift truck constructed in the manner described above, the stabilizer cylinders 127 are actuated, then the pillars 128, which are fitted into the associated guide elements 126 are moved up and down so that the clamp plate 131 is raised by the arm members 129 and is lowered. By using the two lifting cylinders to raise and lower the cubic element 4 backwards and arranged to the side of or on the outside of the respective outer masts lol, around the space 17 between the left and right uprights, and by moving the guide elements, who wear the load stabilizer device A ^ and the Stabilizer cylinders 127, which control the up and down movement of the load stabilizer device A, 'on the inside of the lifting element in the space prevents the guide elements 126 and the Stabilizer cylinder 127 that the fork carriages 48 and 52 are moved forward. Furthermore, the Rear sides of the fork carriages and the front sides of the stands are arranged as closely as possible so that a reduction in the permissible load caused by the assembly of the lifting tool is effectively prevented and so that the loading capacity of the forklift and the longitudinal stability of the car are greatly improved.

-58-

030607/0020

A 44 108 b

k - 176 - 5 /

April 14, 1980 /

As the guide members 126 and the stabilizer cylinder 127 are arranged on the inner sides of the side plates 18 of the lifting element 4 so that they are in Align the longitudinal direction, the following essential advantages can also be achieved, namely that the view from the driver's seat to the front is significantly improved and that the pillars 128, the guide elements

126 and the stabilizer cylinder 127 are protected against possible damage.

The invention is not limited to the construction of this embodiment, and a construction in which the arrangements of the guide elements 126 of the stabilizer cylinder 127 are modified, can also be used. In addition, as shown in Fig. 4, a construction can be used in which the guide members 126 and the stabilizer cylinders

127 fastened in advance in a housing-shaped bracket 135 are, in turn, on the inner sides of the respective side plate elements 18 and the rear sides of the relevant fork carriage 48 and 52 is fastened by means of bolts 136.

This arrangement has the effect of simplifying the mounting of the stabilizer assembly for the load on the forklift truck is made much easier.

On the other hand, as shown in Fig. 44, it is also possible to use an arrangement

_59_

030607/0020

A 44 108 b

k - 176

April 14, 1980

in which the guide elements 126 on the inside
of the side plate members 18 are attached, while a stabilizer cylinder 127 is attached to the rear of the
Gabelwagcns 48 is fastened by bolts 138 by means of a bracket 137. This arrangement is advantageous in that a single stabilizer cylinder is sufficient and, consequently, the manufacturing cost is reduced.

Although the invention has been explained above with reference to preferred exemplary embodiments of the invention, within the scope of the present invention
various modifications and changes can be made as apparent from the claims.

030607/0020

A 44 108 b / / and the Reference corresponding hanger April 15, 1 980 - is / C Objects sign (Rotary) actuation k - 189 / object 23 object mechanism table the reference numerals 25th rotor Stand Oil engine Reference body 26th Reduction gear sign Tilt cylinder 27 pinion 1 Lifting element 28 space 2 Lifting roller 29 hanger 3 Lifting roller 30th Drive part 4th Lifting cylinder 31 Chain anchor pins 5 Piston rod 32 Cones 6th Front axle 34 1. Link axis 7th Front wheel 35 warehouse 8th Bike mount 36 1. Fastener 9 Sprocket 37 Cones 10 axis 38 Rolling rollers 11th Lifting chain 39 2. Fastener 12th Receiving element 40 Cones 13th Guide slot 41 2. Link axis 14th free midnight 42 Cones 15th room 43 Roll roll 16 Side plate 44 Cones 17th (n element) 45 Roll roll Transverse plate 46 lower fork trolley 18th Cover plate 47 hanger Front cross
plate 48 Cones 19th rear transverse 49 20th plate 50 21 Connection 21 « hanger 22nd

0 30 607/0020

A 44 108
April 15th
k - 189 b
1980 -χ- ZÜ53069 Reference
sign object Reference
sign object 51 Display rail 81 Oil engine 52 upper fork carriage 82 Wrapping area 53 Cones 83 Leadership role 54 Cones 84 hanger 55 Opening cylinder 85 Worm gear 56 Piston rod 86 slug 57 fork 87 attack 58 rear rail 88 Horizontal axis 59 front rail 89 Leadership role 60 Connecting bridge 90 Sliding cylinder 61 Support element 91 Fork bracket 62 Cones 92 Fork trolley 63 Support axis 92 ' Fork trolley 64 Roll roll 93 Connecting rod 65 Support element 94 holder 66 Cones 95 Bracket element 67 axis 96 poor 68 Roll roll 97 rear stop 69 Cones 98 Stop spring 70 Connecting element 99 Spring arm 71 Support plate 100 Cylinder bracket 72 Cones 101 outer mast 73 Connection axis 102 inner mast 74 Cones 103 upper cross member 75 hanger 104 lower cross member 76 Winch device 105 upper cross bar 77 Winch arm 106 lower cross bar 78 cable 107 flat area 79 Winding drum 108 increasing range 80 Reduction gear 109 hanger

030607/0020

A 44 108 b
April 15th
k - 189 1980 7- Load stabilizer
Facility Reference
sign object Area 110
111 hanger
Cones A. Arrangement with attached
steered fork 120 Tilt cylinder D. 121
122 Piston rod
Piston rods
hanger H 123 attack 124 Support element
for load 125 Swivel axis 126 Guide element 127 stabilizer
cylinder 128 pillar 129 Poor learn t 130 Cones 131 Clamping plate 132 Connection
element 133 Reinforcement
element 134 Reinforcement
element 135 hanger 136 bolt 137 hanger 138 bolt

030607/0020

Claims (1)

HOEGER ₁ LAW & PARTNERS PATENTANWÄLTE UHLANDSTRASSE 14 cD 7000 STUTTGART 1 SS- A 44 108 b Applicant: KABUSHIKI KAISHA TOYODA k- 176 JIDOSHOKKI SEISAKUSHO April 14, 1980 1, Toyoda-cho 2-chome Kariya-shi Aichi 448 / Japan Expectations 1. A load lifting unit for a pallet truck with a pair of uprights, each of which one on the left and one on the right side of the front of the truck body is arranged and each of which consists of an outer mast and an inner mast, and with two Lifting cylinders used to raise and lower the inner masts and a lifting element relative to the outer masts arranged separately laterally from the right and left stand assembly are characterized by mounting devices which are located in a space between the left and right stand assemblies of the Pairs of stands are provided to enable the lifting and lowering of the lifting element, and by Operating devices located in the room to operate a device operating on the lifting element is coupled. 030607/0020 A 44 108 b k - 176 April 14, 1980 A load lifting unit for a pallet truck according to claim 1, wherein the two cylinders are in place are arranged backwards and to the side of the respective stand assemblies and within one Area in which the view from the driver's seat of the lift truck forward is impaired, and where the cylinders are supported at their lower ends by lower ends of the associated outer masts are. 3. A load lifting unit for a pallet truck according to claim 1 or 2, in which the lifting element consists of a pair of side plate elements which are laterally of one another are arranged perpendicular to the longitudinal axis of the body of the lift truck, and at least consists of a transverse plate member connecting the side plate members together, the Side plate elements of the lifting element via foil elements engage the associated inner masts. 4. A load lifting unit for a pallet truck according to claim 3, wherein the transverse plate member is in a lateral direction perpendicular to the longitudinal axis of the body extends in front of the stand assemblies and forms a fork carriage to which a fork is to be attached. -3- 030607/0 0 20 - 1} U " A 44 108 b / k - 176 - Z- April 14, 1980 5. A load lifting unit for a pallet truck according to claim 3, wherein the length of the in lateral Direction extending transverse plate element is less than the lateral width of the space between the left and right stand assemblies, and where the Transverse plate can be accommodated by the room. 6. A load lifting unit for a pallet truck according to claim 4, wherein the device comprises a winch, wherein the winch has winding devices attached to the rear of the fork carriage of the lifting element are attached. 7. A load lifting unit for a pallet truck according to claim 4, wherein the device is load stabilizer means has, and in the case of the guide elements for holding the load stabilizer device and a stabilizing cylinder or cylinders for controlling the raising and lowering the load stabilizer device attached to the lifting element at locations within this space are. 8. A load lifting unit for a pallet truck according to claim 7, wherein the guide members are in a pair of guide elements and the stabilizer cylinder 030607/0020 -QA- A 44 108 b k - 176 April 14, 1980 a pair of stabilizer cylinders attached to the left and right side plate members, respectively are. 9. A load lifting unit for a pallet truck according to claim 7, in which the guide elements of a pair of guide elements with the left and the right Side plate member are connected, and in which a single stabilizer cylinder on the fork carriage is attached. 10. A load lifting unit for a pallet truck according to claim 7, wherein the guide elements and the Stabilizer cylinders are attached to a housing-shaped bracket which is detachably connected to the lifting element is. 11. A load lifting unit for a pallet truck according to claim 5, wherein the device consists of an extendable Fork arrangement consists, with the transverse plate element at the rear of the side plate elements is arranged, wherein first connecting elements, which have a deployment mechanism for the Form openable fork assembly, at their respective rear inner end regions with a left and a right end portion of a 030607/0020 A 44 108 b k - 176 April 14, 1980 first transverse connecting axis are pivotally connected, which is attached to the lifting element is, wherein second connecting elements, which form the deployment mechanism, on their respective ones rear inner end regions with opposite end regions of a second transverse Connecting axis are pivotally connected, with rolling rollers of the first and the second connecting elements at the rear outer ends the same are rotatably supported and fitted into the inner masts, with rollers from the front inner end portions of the first connecting elements are rotatably supported and in the Rails of a pair of vertical display rails are fitted, the ζ exerting connecting elements further pivotably connected to a fork carriage at their respective front ends which is attached to a lower region of the opening rail, and wherein a raising cylinder is mounted between the second transverse connecting axis and the lifting element. 12. A load lifting unit for a pallet truck according to claim 5, wherein the device consists of an extendable There is fork arrangement, wherein the Ouerplatteelement is arranged at the rear of the side plate members, with rear rails so attached to the front of the lifting element 030607/0020 A 44 108 b . k - 176 - / - April 14, 1980 ^/ are that they are raised and lowered along the inner masts with the lifting element, and with a pair of front rails through a deploying mechanism for the deploying fork assembly are connected, wherein a fork carriage is provided on the front rails to a Fork to attach, and a raising cylinder, which at one end with the lifting element is connected, is arranged in the room. 13. A load lifting unit for a pallet truck according to claim 12, wherein the front rails and the rear rails are suitable to be used with the associated stand assemblies in a direction of deployment perpendicular direction to be overlapped when the fork of the extendable fork assembly withdraws towards the body of the pallet truck. 14. A load lifting unit for a pallet truck according to claim 5, wherein the device consists of a laterally extendable fork which is provided with a fork bracket is provided in a lateral direction which is the longitudinal axis of the body crosses, is slidable with respect to the lifting element, in which the transverse plate element on the Rear side of the side plate members is arranged 030607/0020 -Μα 44 108 b k - 176 - / - April 14, 1980 and wherein guide elements are arranged on upper and lower regions of the lifting element in such a way that that they extend between the left and right side plate members for sliding movement of the fork yoke to guide, and a sliding cylinder at one end of the cylinder and one Piston rod end of the same pivotable with the side plate element of the lifting element or the fork yoke is connected, wherein the guide elements are arranged on the back of the fork bracket in the space are. 15. A load lifting unit for a pallet truck according to claim 5, wherein the lifting member is the side plate members and the transverse plate element with the front or rear ends of the respective Side plate members connected, the device being an articulated fork assembly has, which can be tilted up and down in front of the body of the lift truck, and wherein the actuating devices for generating the tilting movement of a fork of the arrangement with articulated Fork arranged between an upper end of the lifting element and the fork assembly and in the space are included. 030607/0020 A 44 108 b k - 176 April 14, 1980 16. A load lifting device for a pallet truck according to claim 5, wherein the actuating means have a cylinder pair of a left and a right pressure cylinder, which are as tight as possible are arranged in the left and right stand assembly, with the pressure cylinders on their base-side ends with the upper end of the lifting element and at their working ends with the Fork assembly are connected. 17. A lift unit for a lift truck according to claim 5, wherein the device is a rotatable device and is mounted in front of the front of the Ouerplattenelements, which in turn is arranged at the front part of the side plate members, the actuating means for Rotating the rotatable device are arranged on the rear side of the transverse plate element. 18. A lift unit for a lift truck according to claim 5, wherein a transverse plate member at the front portion of the side plate elements is arranged to form the lifting element, one rotatable Device is arranged on the front of the transverse plate element, and wherein the Be ta timingseinrichtungen for the rotatable device at the upper end of the lifting element in the space between the left and right stand are arranged. 030607/0020 HOEGER ₁ STELLRECMT & PARTNER PATENTANWÄLTE UHLANDSTRASSE 14 c ■ D 70OO STUTTGART 1 2953069 ~ w b - A 4 4 108 b Applicant: KABUSHIKI KAISHA TOYODA k- 189 JID0SH0KKI SEISAKUSHO April 17, 1980 1, Toyoda-cho 2-chome Kariya-shi Aichi 448 / Japan Expectations 1. (improved) A load lifting unit for a pallet truck with a A pair of masts consisting of a left and a right outer mast on the front part of the body of the pallet truck are arranged, with a pair of masts of a left and a right inner mast, which run along the outer Masts can be moved up and down, with a lifting element which engages in this way with the inner masts says that it is moved up and down, and with two lifting cylinders separated on the sides of the left or the right masts are arranged around the inner masts and the lifting element with respect to the outer masts and lifting the inner masts, characterized in that each of the two lifting cylinders is arranged in such an area that the view forward from the driver's seat of the lift truck through the Mast is covered and that actuating devices for actuating a coupled to the lifting element Working device are arranged in a space between the left and right masts of the pair of masts. - 2 - 030607/0020 A 44 108 b k - 189 April 17, 1980 - 2 - 2. (improved) A load lifting unit for a pallet truck according to claim 1, wherein the two cylinders are in place are arranged backwards and to the side of the masts and with the cylinders at their lower ends are supported by lower ends of the associated outer masts. .3. A load lifting unit for a pallet truck according to claim 1 or 2, wherein the lifting element consists of a Pair of side panel members that are laterally spaced apart perpendicular to the longitudinal axis of the body of the Lift truck are arranged, and consists of at least one transverse plate element, the side plate elements connects with each other, the side plate elements of the lifting element via rolling elements with the associated inner masts are engaged. 4. (improved) A load lifting unit for a pallet truck according to claim 3, wherein the transverse plate member is in a lateral direction perpendicular to the longitudinal axis of the body extends in front of the masts and a fork carriage forms to which a fork is to be attached. 5. (improved) A load lifting unit for a pallet truck according to claim 3, wherein the length of the is in lateral Direction extending transverse plate element is less than the lateral width of the space between the left and right masts, and where the transverse panel can be taken up by the room. 030607/0020 ft- A 44 108 b ~ -V? Q k - 189 April 17, 1980 6. (improved) A load lifting unit for a pallet truck according to claim 4, wherein the device comprises a winch, the winch having winding means attached to the rear of the transverse plate member of the Lifting element are attached. 7. A load lifting unit for a pallet truck according to claim 4, wherein the apparatus is load stabilizer means has, and the guide elements for holding the load stabilizer device and a stabilizing cylinder or cylinders for controlling the raising and lowering the load stabilizer device attached to the lifting element at locations within this space are. 8. A load lifting unit for a pallet truck according to claim 7, in which the guide elements of a pair of guide elements and the stabilizer cylinder a pair of stabilizer cylinders attached to the left and right side plate members, respectively are. 9. (deleted) 10. A load lifting unit for a pallet truck according to claim 7, wherein the guide elements and the Stabilizer cylinder attached to a housing-shaped bracket, which are detachable with the lifting element connected is. 030607/0020 A 44 108 b k - 189 April 17, 1980 11. (deleted) 12. (deleted) 13. (deleted) 14. (improved) A load lifting unit for a pallet truck according to claim 3, wherein the device consists of a lateral extendable fork consists / which is provided with a fork bracket, which is in a lateral Direction which perpendicularly crosses the longitudinal axis of the body, slidably displaceable with respect to the lifting element is, and in the case of the guide elements on the back of the fork bracket in the space in such a way are that they extend between the left and right side plate members of the lifting element, to guide the sliding movement of the fork yoke, and with a sliding cylinder on one Cylinder end and a piston rod end of the same pivotable with the side plate element of the Hubele-.ments or the fork yoke is connected. 15. (deleted) 16. (deleted) 030607/0020 A 44 108 b k - 189 April 17, 1980 17. (improved) A lift unit for a lift truck according to claim 3, wherein the device is a rotatable device
and is mounted on the front side of the lifting element, and in which the actuating means for rotating the rotatable device are arranged on the rear side of the transverse plate element. 18. (deleted). 030607/0020 A 44 108 b
April 17, 1980 Brief declaration in accordance with Article 19 Paragraph 1 of the International Patent Convention The claims described on the substitute pages differ from the originally filed claims in the following Points different. ^ Claim 1 has been improved to include the feature of the inventor to clarify. Claim 2 has been improved in accordance with the above improvement of claim 1. Claims 4 and 5 have been improved with regard to the designations used. . Claim 6 has been improved with regard to its partial description. Claims 9, 11, 12 and 13 have been deleted. Claim 14 has been improved with regard to a partial description. Claims 15 and 16 have been deleted. Claim 17 was in terms of its' partial description improved. Claim 18 has been deleted. 030607/0 020