CA2056377A1 - Lifting arm with safety hook and vehicle fitted with a device comprising it - Google Patents

Lifting arm with safety hook and vehicle fitted with a device comprising it

Info

Publication number
CA2056377A1
CA2056377A1 CA 2056377 CA2056377A CA2056377A1 CA 2056377 A1 CA2056377 A1 CA 2056377A1 CA 2056377 CA2056377 CA 2056377 CA 2056377 A CA2056377 A CA 2056377A CA 2056377 A1 CA2056377 A1 CA 2056377A1
Authority
CA
Canada
Prior art keywords
tongue
hook
nose
arm
end section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA 2056377
Other languages
French (fr)
Inventor
Bernard Lambert
Bernard Januel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bennes Marrel SA
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2056377A1 publication Critical patent/CA2056377A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60PVEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/64Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable
    • B60P1/6418Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable the load-transporting element being a container or similar
    • B60P1/6463Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable the load-transporting element being a container or similar fitted with articulated beams for longitudinal displacement of the container

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Air Bags (AREA)

Abstract

ABSTRACT OF THE DISCLOSURE
A Lifting device incorporating an arm and comprising at a free end of an end section (2, 2', 102, 102') of said arm a hook (3, 3', 3", 103, 103') comprising a nose (6, 6', 6", 106, 106') and a claw (7, 7', 7", 107, 107') together delimiting an opening (8, 8', 108, 108') designed to be crossed by a handling bar (4) fastened to a load (5) to be lifted, characterised in that the distance between said nose and said claw is variable, said nose and said claw being mobile relative to each other within said hook and connected to movement control means (10, 10', 10", 110, 110').

Description

WO 90/14249 PCT/FR90/00322 ~;

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Lifting arm with safety_hook and vehicle fitted with a device comprisinq it The invention concerns a lif~ing device including an arm, in particular a loading/offloading lifting beam type device. -A loading/offloading lifting beam is a particulartype of lifting arm designed to be mounted on the chassis of a vehicle for loading onto it or offloading from it loads such as containers, packing cases, skips, platforms and the like.
Examples of such lifting beams are given in the ~; documents FR-2.109.109 and FR-2.185.520, for example.
They comprise a cranked arm disposed in a longitudinal vertical plane of the vehicle and formed by a beam articulated about a transverse pin attached directly or indirectly to the chassis of the vehicle and a column joined to the beam at right angle and provided at a free end with a hook.
To engage a load to be lifted onto the chassis it is currently necessary to control the angle of rearward pivoting of the cranked arm so as to cause the opening of the hook to face exactly and horizontally a handling ring or bar with whi~h the load is provided and then, by reversing the vehicle towards the load, to cause said ~ 25 ring or bar enter the hook.
`~ Engaging the hook with a load to be lifted therefore requires a skilled operator to control the manoeuvre and the operator must have a good view.
This requirement for visibility cannot be satisfied in some applications and locations (during the hours of darkness, for example). Also, as in other situations, there is additionally the requirement to reduce the time and the energy required to accomplish the task, even if the operator has not yet acquired the skill necessary to conduct the hook engaging manoeuvre in an optimum way.

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This manoeuvre to engage the hook is made more difficult by the fact that once the ring or bar has been successfully introduced into the hook it must be prevented from escaping ~herefrom inadvertently.
- 5 An object of the invention is a lifting device hook enabling easy entry of a bar, especially in an unfavourable environment, without risk of inadvertent escape of the bar.
To this end it generally proposes a lifting device incorporating an arm and comprising at a free end of an end section of said arm a hook comprising a nose and a claw together delimiting a loop with an opening designed to be crossed by a handling bar fastened to a load to be lifted, characterised in that the distance between said nose and said claw is variable, said nose and said claw being mobile relative to each other within said hook and connected to movement control means.
According to another aspect of the invention, the end pàrt of the arm and the hook is adapted to facilitate blind execution at high speed and with reduced consumption of energy of a manoeuvre to hook onto a load to be lifted even if there is significant doubt as to the relative position of the arm and the handling ring/bar on the load (for example, when loading onto the vehicle a load of indefinite shape or resting on uneven ground, i.e. on a slope, at a lower level, etc). To this end the invention proposes that the end section comprises in the immediate vicinity of the hook a guide plate inclined relative to the end section and oriented towards the hook opening.
According to optionally combinable preferred -:
features of the invention:
- the claw is part of a hook body fastened to the end section and the nose is part of a tongue pivoting about a pin in the immediate vicinity of said hook body : :~
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and mobile between a closed position in which said nose is directed towards the free end of the claw and a retracted position in which said nose is folded towards the hook body, said pivoted tongue being displaced by said operating member, which is advantageously a single-acting ram with a return spring;
- said tongue is extended at the end opposite the nose by a lever on which operates said operating member which is further coupled to the end section;
- the lever is aligned with the nose; :~
- said lever comprises an abutment adapted to bear~:
against the end section in the closed configuration of the nose;
- the guide plate is a shield pivoted to the end :
section about the same pivot pin as the tongue; ;
- said operating member is a pneumatic ram; .
- the hook is formed by a hook body fixed to the ~ .
end section and incorporating the nose and, forming part .
. of the claw, two parallel lateral cheeks linked by a web curved towards the nose and together determining a groove `
open away from the nose and a pivoted tongue in said groove having a free end projecting at one end of the groove approximately towards the nose;
- the tongue is adapted to pivot in the groove of 25the hook bady between a maximum closed configuration in ::
which the tongue lies along the curved web and its free -end is near the nose and a maximum open configuration in .
which the tongue is moved away from said web;
- the free end of the tongue, thicker than the 30remainder of the tongue, has shoulders adapted in said maximum open configuration to bear against abutment areas formed on the edges of the la~eral cheeks; :
- an actuator is disposed in said groove between the tongue and a bearing area fixed relative to the body 35of the hook; -~
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WO 90/14249 P~T/FR90/00322 , .

- said actuator is a ram;
- a transverse pin fastened to the tongue is engaged in longitudinal slots in the lateral cheeks;
- the device further comprises a transverse pin fastened to the lateral cheeks of the hook body and engaged in an oblong slot in the tongue beyond the transverse pin fastened to the tongue relative to the area in which the hook is fixed to said end of said arm, said slot being directed substantially towards the nose and, when the tongue is bearing against said web, the pin fixed relative to the tongue being near the ends of the longitudinal slots nearest said fixing area and the pin fixed relative to the lateral cheeks passing through said oblong slot near its end farthest away from the nose;
~ a fixed pin passing through the lateral cheeks in the fixing area, an actuator is disposed between said fixed pin and the pin fixed relative to the tongue;
: - the web linking the lateral cheeks adapted to provide a bearing area for the tongue is continuous;
- the lateral cheeks are extended longitudinally away from the claw by fixing lugs at the end of the arm and have coaxial holes through them adapted to receive a fixing pin, the hook having on either side of said lugs ~ bearing areas adapted to bear against corresponding :` 25 bearing areas on said end of the arm;
: - the guide plate is fixed relative to the end section;
- the guide plate comprises a shield pivoted in the immediate vicinity of the hook and acted on by an operating member with a range of pivoting movement between a retracted configuration in which said shield lies along the end section of the arm and a hooking configuration in which said shield is inclined relative to said end section;
; .
- the operating member is an inflatable airbag ,. .; . . ' WO 90/14249 PCT/FR90/00322 `:~

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disposed between the end section and the shield and connected to a fluid supply.
The invention also proposes a vehicle comprising an arm type lifting device of this kind advantageously of 5the type having a cranked arm beam optionally articulated and mounted on the chassis of the vehicle to pivot about a transverse axis.
Objects, features and advantages of the invention emerge from the following description given by way of 10non-limiting example with reference to the appended drawings in which:
- figure 1 is a side view in elevation of a lifting arm according to one embodiment of the invention with an articulated guide plate in the deployed configuration;
15- figure 2 is a detailed view in elevation of a configuration in which the hook is in its maximum open ~ configuration to allow access to a handling bar/ring;
: - figure 3 is another view of it in elevation in which the guide plate is retractedi;
: 20- figures 4 and 5 are respectively side and front views in elevation of the body of the hook from figures 1 through 3;
- figures 6 and 7 are respectively side and front views in elevation of the tongue of this hook;
25- figures 8 and 9 are respectively side views in : : elevation of this hook in the minimum and maximum open :configuration;
- figùres 10 and 11 are views in elevation similar to figures 2 and 3 of a lifting arm according to another : 30 embodiment of the invention, also with an articulated guide plate, in respectively deployed and retracted configurations;
. - figures 12 and 13 are respectively side and front views in elevation of the body of the hook from figures 3510 and 11;
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WO 90/14~49 PCT/FR90/00322 6 ~ 7 - figures 14 and 15 are respectively side and top views of the mobile part of this hook;
- figures 16 and 17 are side views in elevation of this hook in respectively minimum and maximum open configurations;
- figures 18 and 19 are lateral views in elevation of the lifting arm according to two further embodiments of the invention analogous to the arms from figures 1 : through 9 and from figures 10 through 17 but with a fixed guide plate;
- figures 20 through 28 are lateral views in elevation of a vehicle comprising a lifting arm according to figures 1 through 9 representing successive phases between an unloaded transport configuration and a configuration with a platform loaded onto the vehicle, ~:~ figures 22 through 24 representing three possible initial positions of the platform to be loaded;
- figure 29 is a lateral view in elevation of an alternative embodiment of the hook from figures 1 through 9; and - figure 30 is a view of it in elevation as seen in the direction of the arrow XXIX :in figure 29.
Figures 1 through 9 show a lifting arm 1 forming part of an arm type lifting device that will be descri~ed with references to figures 20 through 28.
The: lifting arm l comprises an end section 2 supporting at its end a hook 3 designed to engage the handling ring or bar 4 which is provided on a load 5 to be lifted (see figures 20 through 28). The bar 4 is shown in figures 1 through 3 by a dashed outline circle at various positions relative to the arm l.
1: In more detail, the hook 3 comprises a nose 6 and a claw 7 whose facing ends 6~ and 7A conjointly delimit an ~ open loop with a space 8 through which a bar can enter : 35 the aperture 3A of the hook. The nose and the claw are ....
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WC3 90/14249 PCT/FR90/00322 : ~
7 ~ 377 , ~ q, . :
carried by members mobile with respect to each other whereby the distance e between the free ends 6A and 7A
and therefore the width of the space 8 can vary between a maximum open value (see figure 2) in which the bar 4 can enter the hook (or escape from it) and a minimum open value (see figures 1 and 3) less than the thickness of the handling bar (its diameter in this case) so that the bar can no longer escape from the hook (see figure 3).
An actuator 10, in this instance a pneumatic ram, advantageously associated with spring return means such as a spring (not shown) is provided to control relative movement between the nose and the claw. As an alternati~e (not shown)~ this ram is a hydraulic ram.
The end section 2 of the arm 1 is advantageously provided in the immediate vicinity of the hook with a guide plate 11 inclined relative to the section 2 and with which the space 8 is aligned when the hook is in the maximum open configuration. The angle of inclination between the guide plate and the arm is between 15 and 40, for example, so that in this example the guide plate is substantially vertical.
The guide plate 11 is in this embodiment in the form of a shield 12 articulated about an pin 13 in the immediate vicinity of the nose of the hook 3; this shield is acted on by an operating member 14, in this example an inflatable airbag connected to any known type inflation/deflation unit (not shown). The shield 12 therefore has a deployed service position (fi~ures 1 and 2) and a retracted position (figure 3).
The hook 3 and its operating member are shown in detail in figures 4 through 9.
The hook 3 comprises a hook body 15 fastened to the ~ end section 2 of the arm 1. The hook body comprises a ; base 16 which is extended by the claw 7. ~he base comprises a protruberance 17 facing the free end 7A of f~

8 ~

the claw forming a step for the nose 6 and formed by two parallel cheeks 17A and 17B holding a pivot pin for a tongue 18; this pivot pin is the pivot pin 13 of the shield 12.
The nose 6 forms part of the tongue 18, is located between the cheeks of the step 17 of the nose and has the pin 13 passed through it. The tongue further comprises, opposite the free end 6A of the nose, two parallel flanges l9A and l9s together forming a lever 19 joined together at a distance from the pin 13 by a transverse finger 20 fixed to the end of the piston of the actuator 10 constituting the operating member of the hook, the cylinder of this actuator being articulated to a transverse pin 21 of the arm 2 by which the hook body 15 is attached to the arm.
As can be seen in figures 8 and 9, the actuator 10 is accommodated within the end section of the arm and the tongue is housed under the shield.
The lever 19 is advantageously provided at its free end with an abutment 22 adapted ~o bear against a bearing web 23 fastened to the arm adapted to prevent, like the actuator, the nose pivoting outwardly of the hook, beyond the figure 8 configuration. In this minimum open configuration the actuator is retracted whereas it is deployed in the maximum open configuration of figure 9.
The bearing web may simply be a part of the structure of the arm.
As can be seen from figure 1 in which the bar is shown at various locations a, b and c along the guide plate, the bar may itself force pivoting of the nose 6 (and therefore of the tongue 18) so that it can enter the hook. This is shown clearly in figure 2; it is possible immediately the actuator is connected to its feed unit (not shown) so that it is rendered free to move. On the other hand, immediately the bar has entered the hook and '' . ~,.
.~", g ;~ S377 the nose is returned to the position facing ~he claw, the spring return means of the actuator 10 close the entry of the hook. The bar can therefore no longer force its way out. `
Figures 29 and 30 show an alternative embodiment of the hook 3 from figures 1 through 9. Parts similar to ~-those of the hook 3 are shown by the same reference numbers as are used in figures 1 through 9 with a ~double prime~
Like the hook 3, the hook 3~ can be implemented with no guide plate. ~`
It comprises a base 16' designed to be fastened to the end section of the arm 1. Two parallel lateral cheeks 17~A and 17~s are fastened to the base. set~een ;~
these cheeks is fixed a hook body 15' ending in a claw 7'. The hook body is offset r~lative to the base 16~ so that a space is formed between the cheeks and between the ~
body and the base. ;, The lateral cheeks have front portions 61 and 62 `
which extend towards the free end 7~A of the claw and towards the interior of the aperture 3~A of the hook and having flanks 63 that are approximately parallel at the free end of the claw.
At the front of these portions (in this example the front corner 64) is mounted a pivot pin adapted to receive a tongue 18" whose upper free end forms the nose 6" of the hook. ~ -At its lower free end (facing towards the base 16") this tongue is coupled to an operating member 10"
accommodated in the aforementioned space and advantageously associated with a spring return unit (not shown) internal to this unit or otherwise. This unit is ~-in this example a pneumatic or hydraulic actuator whose cylinder is fixed to the lower part of the body 15" (in this example by means of a bracket) and whose piston rod .:
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is articulated to the lower free end of the tongue. As an alternative, this unit may be an electric uni~.
In its closed position the tongue reduces the width of the space to a value less than the diameter of the handling bar 4. In the open position, on the other hand, the width of the space is greater than this diameter, enabling the bar to pass freely.
According to one advantageous feature of the hook 3", the portions 61 and 62 extend inwardly of the aperture over a distance sufficient for the nose, in the open position, to be retracted entirely between these portions so that $he tongue cannot be damaged by impact of the hook with the bar or because of any inclination of the bar relative to an optimum transverse direction of entry into the hook.
The flanks 63 which guide the bar towards the interior of the hook end inside the hook at projections 65 which reinforce the locking of the bar when it has entered the hook. The bar can then move freely without impeding the retraction of the tongue.
As in the case of the hook 3, the tongue 3 may be pushed open by the bar as it enters (the operating member being "disengaged") or the tongue may be 3pened by commanding the operating member.
Figures 10 through 17 show an embodiment in which a part of the claw is mobile relative to the nose, all other features being similar. Elements similar to those of figures 1 through 9 are identified by the same reference number "primed".
The hook 3' comprises a hook body 15' fixed to the end of the end section 2' of the arm, to which the nose 6' is fastened and which further comprises two lateral cheeks 30 and 31 linked by a curved continuous or discontinuous web 32 bordering the aperture 3A' of the hook determining conjointly in the claw a groove 33 open ', ~,, " , " ~ r. ", , ; ~, j; A .;~ ' 'r WO 9O/14249 PCT/FRgO~00322 11 ~, ' opposite the nose. In this groove is inserted a tongue 34 having an end 7A' projecting relative to the cheeks 30 and 31 approximately facing the nose 6'.
The tongue 34 pivots between a minimum open configuration (figures l and 16) in which the tongue lies along the web 32 whereas its free end (7~) is near the hook nose and a maximum open configuration (figures 10 and 17) in which the tongue is inclined and moved away from the web.
The free end 7A~ of the tongue, thicker than the remainder of the tongue, has shoulders 36 and 37 adapted in said maximum open configuration to bear against abutment areas 38 and 39 provided on the edges of the lateral cheeks. ;;
An actuator (here a ram) disposed in said groove 33 -is operative between the tongue 34 and a bearing area 40 fixed relative to the hook body.
: .
A transverse pin 41 fastened to the tongue 34 is engaged in longitudinal slots 42 formed in the lateral cheeks 30 and 31.
There is additionally a transversa pin 44 fastened to the lateral cheeks of the hook body and engaged in an oblong slot 45 provided in the tongue beyond the transverse pin 41 fastened to the tongue relative to the 2S area 40 in which the hook is fixed to said end of said arm, said slot 45 being generally directed towards the hook nose and, when the tongue hears against said web, the pin 41 fixed relative to the tongue being near the ends of the longitudinal slots nearest said fixing area 40 and the pin 44 fixed relative to the lateral cheeks passing through said oblong slot 35 near its end farther ~away from the hook nose.
A fixed pin 50 passes through the lateral cheeks in the fixing area and the ram 10 is disposed between the fixed pin 50 and the pin 41 fixed relative to the tongue.
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WO 90/14249 PCT/FR90!00322 12 ~(~5~j3~7 The lateral cheeks are extended longitudinally away from the claw 7' by fixing lugs 51 at the end of the arm and comprise coaxial holes adapted to receive the fixing pin 50; the hook comprises on either side of these lugs bearing areas 52 and 53 adapted to bear against corresponding bearing areas formed on said end of the arm.
A hook of this kind is described in French patent application 89-02122 filed 17 February 1989.
The concept of a hook operated by a pneumatic actuator represents the lowest manufacturing cost consistent with irreversible automatic high-security locking.
Figures 18 and 19 show lifting arms 101 and 101' similar to the arms 1 and 1~ except that the guide plates 111 and 111' are fixed. Similar elements have the same reference numbers as in figures 1 through 9 and 10 through 17 respectively but increased by 100. This is a simple version which trades a permanent lateral overall dimension (still limited and acceptable) for low cost, great stiffness, excellent guidance (including by the free second side of the plate 112 or 112' carrying the guide plate and great reliability.
Figures 20 through 28 show several stages in loading a platform 5 onto a vehicle 200 equipped with an arm type lifting device as shown in Eigures 1 through 9.
More precisely, it comprises (see figure 20) a loading/offloading lifting beam comprising a cranked arm 1 disposed in a longitudinal vertical plane of the vehicle 200 and in the form of a beam 201 articulated to ~ ~ a transverse pin 202 coupled directly or indirectly to j; the chassis 203 of the vehicle and a column 204 joined at ~ right angles to the beam 201 and designed to be stowed ) immediately behind the cab 20S of the vehicle. As an ' 35 alternative, the column is articulated with restricted , .
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13 ~ ~3~?t7 travel to the end of the baam.
The end section 2 of the arm is therefore an upper part of the column 204. `~
In the conventional way equipment 206 such as a spare wheel is stowed between the cab 205 and the column 204 and it is to avoid any contact between the guide plate 11 and this equipment that the guide plate is advantageously disposed on an articulated shield.
Apart from the column 204, the vehicle 200 is conventional and will not be further described.
To load the platform 5, the first step is to swing the arm to the rear. During this movement the inflatable airbag 14 is inflated (figure 21).
After the arm is swung into a predefined loading ~ `
configuration, the vehicle is reversed until the guide plate 11, which is then substantially vertical (approximately perpendicular to the instantaneous swinging radius) comes into contact with the ring 4 on the platform 5.
When, as here, the guide plate 11 is retractable the inflatable airbag (or a pneumatic or hydraulic actuator or cushion substituted for it) reduces the impact resulting from such contact. `
Figures 22, 23 and 24 show by way o~ exa~ple three relative positions of the load (platform) 5 relative to the vehicle. In figure 22 the load is resting on the ground on which the vehicle is also resting; in figure 23 the platform 5 is at a lower level and in figure 24 the ~;;
platform is on a downward slope towards the vehicle. In all three cases the arm comes into contact with the bar 4 through the intermediary of the guide plate. ~ -The hook is caused to locate the bar by ~raising the arm (i.e. swinging it towards the front). The shape ~h and the position of the guide plate procure a substantially vertical movement of the end of the beam ~ ., j. .

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_ WO 90/14249 PCT/FR90/00322 14 ~. ~7~ :

during this operation.
During this lifting of the arm the bar is guided by the guide plate ll and enters the hook (figure 25) causing the automatic retraction tongue 18 to pivot into the retracted position (see also figure 2). The tongue then returns to its normal rest position, so locking the bar in the hook (figures 3 and 26).
Further lifting movement raises the platform (figure 27)l after the shield has been retracted, the movement continuing until the final configuration of figure 28.
The bar is gripped without any movement of the vehicle after the previously mentioned reversing.
Locking is irreversible and automatic.
Unlocking is effected by operations which are the reverse of the locking operations, except that unlocking is possible only if the shield is deployed; it is produced by deploying the ram lO, to enable which an operator must apply continuous pressure throughout the unlocking operation.
Similar sequences are followed for the other lifting arms shown above.
It goes without saying that the foregoing description has been given by way o non-limiting example only and that numerous variants may be put forward by the man skilled in the art without departing from the scope of the invention.
In particular, the hook described above need not have any guide plate.

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Claims (22)

1. Lifting device incorporating an arm and comprising at a free end of an end section (2, 2', 102, 102') of said arm a hook (3, 3', 3", 103, 103') comprising a nose (6, 6', 6", 106, 106') and a claw (7, 7', 7", 107, 107') together delimiting an opening (8, 8', 108, 108') designed to be crossed by a handling bar (4) fastened to a load (5) to be lifted, characterised in that the distance between said nose and said claw is variable, said nose and said claw being mobile relative to each other within said hook and connected to movement control means (10, 10', 10", 110, 110').
2. Lifting device according to claim 1 characterised in that the end section (2, 2', 102, 102') comprises in the immediate vicinity of the hook (3, 3', 103, 103') a guide plate (11, 11', 111, 111') inclined relative to the end section and oriented towards the opening.
3. Device according to claim 2 characterised in that the guide plate (111, 111') is fixed relative to the end section.
4. Device according to claim 2 characterised in that the guide plate comprises a shield (12, 12') pivoted in the immediate vicinity of the hook and acted on by an operating member (4, 4', 114') with a range of pivoting movement between a retracted configuration in which said shield lies along the end section of the arm and a hooking configuration in which said shield is inclined relative to said end section.
5. Device according to claim 4 characterised in that the operating member (4, 4', 114') is an inflatable airbag disposed between the end section and the shield and connected to a fluid supply.
6. Device according to any one of claims 1 through 5 characterised in that the claw (7, 7', 107) is part of a hook body (15, 15' 115) fastened to the end section and the nose (6, 6", 106) is part of a tongue (18, 18", 118) pivoting about a pin (13, 113) in the immediate vicinity of said hook body and mobile between a closed position in which said nose is directed towards the free end of the claw and a retracted position in which said nose is folded towards the hook body (15, 115), said pivoted tongue being displaced by said operating member (10, 110).
7. Device according to claim 6 characterised in that said tongue (18, 118) comprises a lever (19, 119) fastened to said nose on which operates said operating member which is further coupled to the end section.
8. Device according to claim 7 characterised in that the lever (19, 119) is aligned with the nose.
9. Device according to claim 8 characterised in that said lever comprises an abutment (22, 122) adapted to bear against the end section in the closed configuration of the nose.
10. Device according to any one of the claims 6 through 9 characterised in that the guide plate (11) is a shield (12) pivoted to the end section about the same pivot pin (13) as the tongue.
11. Device according to any one of the claims 6 through 10 characterised in that said operating member (10, 110) is a pneumatic ram.
12. Device according to any one of claims 1 through 5 characterised in that the hook is formed by a hook body (15', 115') fixed to the end section and incorporating the nose (6', 106') and, forming part of the claw, two parallel lateral cheeks (30, 31, 130, 131) linked by a web (32, 132) curved towards the nose and together determining a groove (33, 133) open away from the nose and a pivoted tongue (34, 134) in said groove having a free end (7A', 107A') projecting at one end of the groove approximately towards the nose.
13. Device according to claim 12 characterised in that the tongue (34, 134) is adapted to pivot in the groove (33, 133) of the hook body between a maximum closed configuration in which the tongue lies along the curved web (32, 132) and its free end (7A', 107A') is near the nose and a maximum open configuration of the nose in which the tongue is inclined relative to said web.
14. Device according to claim 12 or claim 13 characterised in that the free end (7A, 107A') of the tongue, thicker than the remainder of the tongue, has shoulders (36, 37, 136, 137) adapted in said maximum open configuration to bear against abutment areas (38, 39, 138, 139) formed on the edges of the lateral cheeks.
15. Device according to any one of claims 12 through 14 characterised in that it comprises an actuator (10', 110') disposed in said groove (33, 133) between the tongue (34, 134) and a bearing area (40, 140) fixed relative to the body of the hook.
16. Device according to claim 15 characterised in that said actuator is a ram.
17. Device according to any one of claims 12 through 16 characterised in that it comprises a transverse pin (41, 141) fastened to the tongue (34, 134) and engaged in longitudinal slots (42, 142) in the lateral cheeks.
18. Device according to claim 17 characterised in that it further comprises a transverse pin (44, 144) fastened to the lateral cheeks (30, 31, 130, 131) of the hook body and engaged in an oblong slot (45, 145) in the tongue (34, 134) beyond the transverse pin (41, 141) fastened to the tongue relative to the area (40, 140) in which the hook is fixed to said end (2', 102') of said arm, said slot being directed substantially towards the hooking nose and, when the tongue (34, 134) is bearing against said web, the pin (41, 141) fixed relative to the tongue being near the ends of the longitudinal slots (42, 142) nearest said fixing area and the pin (44, 144) fixed relative to the lateral cheeks passing through said oblong slot (45, 145) near its end farthest away from the hook nose.
19. Device according to claim 17 or claim 18 characterised in that it comprises a fixed pin (50, 150) passing through the lateral cheeks in the fixing area and an actuator (10' 110') is disposed between said fixed pin (50, 150) and the pin (41, 141) fixed relative to the tongue.
20. Device according to any one of claims 12 through 19 characterised in that the web (32, 132) linking the lateral cheeks adapted to provide a bearing for the tongue (34, 134) is continuous.
21. Device according to any one of claims 12 through 20 characterised in that the lateral cheeks (30, 31, 130, 131) are extended longitudinally away from the claw by fixing lugs (51, 151) at the end (2' 102') of the arm and have coaxial holes through them adapted to receive a fixing pin (50, 150), the hook having on either side of said lugs bearing areas adapted to bear against corresponding bearing areas on said end of the arm.
22. Vehicle comprising an arm type lifting device according to any one of claims 1 through 21 and comprising in a vertical longitudinal plane a cranked arm comprising a beam articulated about a transverse pin coupled at least indirectly to the chassis of said vehicle and, coupled to said beam approximately at right angles, a column terminated by said end section and said hook.
CA 2056377 1989-05-26 1990-05-04 Lifting arm with safety hook and vehicle fitted with a device comprising it Abandoned CA2056377A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR89/06949 1989-05-26
FR8906949A FR2647395B1 (en) 1989-05-26 1989-05-26 TOWING ARM WITH MOUNTING RAMP AND VEHICLE EQUIPPED WITH AN APPARATUS COMPRISING SAME

Publications (1)

Publication Number Publication Date
CA2056377A1 true CA2056377A1 (en) 1990-11-27

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ID=9382062

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2056377 Abandoned CA2056377A1 (en) 1989-05-26 1990-05-04 Lifting arm with safety hook and vehicle fitted with a device comprising it

Country Status (4)

Country Link
EP (1) EP0477191A1 (en)
CA (1) CA2056377A1 (en)
FR (1) FR2647395B1 (en)
WO (1) WO1990014249A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007099233A (en) * 2005-10-07 2007-04-19 Kyokuto Kaihatsu Kogyo Co Ltd Cargo handling vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5688685A (en) * 1994-12-16 1997-11-18 Cytec Technology Corporation System and methods for biodegradation of compounds
JP5027545B2 (en) * 2007-03-30 2012-09-19 極東開発工業株式会社 Container handling vehicle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2109109A5 (en) * 1970-10-01 1972-05-26 Saphem
FR2294877A1 (en) * 1974-12-16 1976-07-16 Bennes Marrel Hydraulic jib for container handling - has articulating retractable levers raising loads to rear of lorry
DE2726353C3 (en) * 1977-06-10 1981-01-08 6670 St Ingbert Device for picking up, tipping and setting down containers on vehicles
DE2903462A1 (en) * 1979-01-30 1980-08-07 Meiller Fahrzeuge Security jaw for lifting skip - has weighted retainer to prevent coupling opening

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007099233A (en) * 2005-10-07 2007-04-19 Kyokuto Kaihatsu Kogyo Co Ltd Cargo handling vehicle
JP4723971B2 (en) * 2005-10-07 2011-07-13 極東開発工業株式会社 Cargo handling vehicle

Also Published As

Publication number Publication date
WO1990014249A1 (en) 1990-11-29
FR2647395A1 (en) 1990-11-30
FR2647395B1 (en) 1991-09-13
EP0477191A1 (en) 1992-04-01

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