DE2740318A1 - FASTENING DEVICE FOR A LOAD ON AN AIRCRAFT - Google Patents

Description

PAT E N TA N WA LT E A. GRÜNECKER

IDtPL-ING

H. KINKELDEY W. STOCKMAIR

DH-ING AeE (CAlTECHt

K. SCHUMANN

OR FER NAT DWL PMYS

P. H. JAKOB

DIPL-ING

G. BEZOLD

OHRERNAT on. -OCM

8 MUNICH 22

MAXIMILIANSTRASSE 43

Sept. 7, 1977 P 11 961

RAFAUT &. Cie

13, avenue Marcelin Berthelot F-92 VILLENEUVE-LA-GAEENIIE

Fastening device for a load on an aircraft

The invention relates to a take-away and discarding device a load such as a bomb mounted under an aircraft such as an airplane or a helicopter.

The loads generally have fastening rings on their top, and the devices previously used have hooks, which engage in the fastening rings to hold the loads. These systems have two major disadvantages.

In order to avoid the load swinging during transport, this is held with curved flanges, which are long

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Telephone (οββ) aaaeea TELEX OB-Οβ SSO TELESRAMS MONAPTH TELECOPER

difficult and cumbersome to assemble and constantly on the load remain so that they create a disadvantageous resistance.

If, moreover, the load is to be thrown off, then the hooks engaging in the rings must be withdrawn, for this purpose considerable force is required as the load is very heavy and is further increased by the flanges. So it has to be kinematic connection can be provided for the pivotably mounted hook, which exerts a considerable unlocking force on these hooks.

The invention aims to provide a device which does not have these disadvantages.

For this purpose it is provided according to the invention that in a housing attached to the aircraft or helicopter for each Ring of the load a device is provided which gripping devices for each ring which are adjustable in height so that the load can be attracted against a surface of the housing.

According to a further advantageous feature of the invention it is provided that the gripping devices have at least one pawl which is normally pivoted into its open position is and has at least one lower finger which can engage in the ring that a freely rotatably mounted roller is provided is which, by means of a kinematic connection against the pawl is adjustable to block this during the transport of the load in the closed position, and that a control device is provided, which adjusts the kinematic connection so that the roller can be moved away from the pawl and the pawl thereby opens during the release of the load.

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According to a preferred embodiment it is provided that the gripping device has two pawls, which normally are pivoted to their open position, and wherein each pawl has at least one lower finger which engages the ring can, and that a device is provided which ensures that the other pawl rotates with the rotary movement of one pawl -will, wherein the freely rotatably mounted roller then rests against one of the two pawls.

Another feature of the invention is that each pawl has an upper finger with the upper fingers interlaced are, however, touching each other in such a way that the pivoting movement of one pawl causes a pivoting movement of the other pawl, in that the two upper fingers lie against one another, and that a stop is provided which the rotational movement of the one pawl limited in one direction, while the rotary movement in the other direction in the closed position borrowed away by the freijbe Role is limited.

Finally, the height of the gripping device is advantageously adjusted by means of a screw connection from the outside of the housing is accessible and enables the load to be drawn against a solid surface connected to the housing, wherein the freely rotatably mounted roller rests against the device.

According to the invention, a housing connected to an aircraft or a helicopter is proposed in which for a height-adjustable device is provided for each ring of the load, the two normally pivoted into their open position Has pawls, the pawls each at least

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have a lower finger that can engage the ring. Furthermore, devices are provided through which the rotary movement the one pawl is transferred to the other pawl, and a kinematic connection is provided with which a freely rotatable roller bearing against one of the pawls when the pawl is in the closed position during transport the load can be blocked, and a control device which controls the kinematic connection of the load such that the Roll comes free from the pawl and the pawls can therefore be opened to release the load.

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Further features, details and advantages of the invention emerge from the following description of an exemplary embodiment based on the drawing. Show in it:

Fig. 1 is a vertical longitudinal sectional view through the inventive Device which is intended for attachment to an aircraft, the elements of the device assume a position in which a load is latched;

FIG. 2 shows a sectional view along the line II-II according to FIG. 1;

Fig. 3 is a view of the device according to the invention from above and

4 shows a schematic partial sectional view, with the elements of the device according to FIG. 1 in their open position are shown.

The device according to the invention has a housing 1, which with an aircraft such as an airplane or a helicopter. The device serves to carry a load C, such as a Bomb to take with you or to drop. More precisely, the device is designed to carry conventional ammunition charges or discard, which are held at their upper portion by means of two fastening rings A. Furthermore, the device according to the invention essentially two devices E and F, which are formed identically and in the same way with the rings A of the charge C cooperate. It is therefore only the device E will be described in detail.

The device E has a holding claw 2, the upper part 3 can slide in a sleeve 4 which is fixed to the housing 1, and the lower part of which has the shape of a fork 5, which two

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Axes 6 and 7 carries. A pawl 8 or 9 is pivotably mounted on each of these axes. At its lower end, the ones run from the axes 6 and 7 downward reaching pawls 8 and 9 in fingers. E.g. the pawl that is closer to the center of the housing runs 8 or the inner pawl into two fingers 10a and 10b, while the outer pawl 9 ends in a single finger 11 / which can be inserted between the fingers 10a and 10b of the inner pawl 8 (see FIG. 2) when the two pawls are in the receiving position are moved towards each other. The top of fingers 10a, 10b and 11 is preferably straight.

Each pawl has a finger 12 or 13 at its upper end which runs parallel to the lower fingers .1Oa and 10b and 11, respectively. The upper fingers 12 and 13 are interlaced with one another in this way arranged that when on the upper finger 12 of the pawl 8, e.g. above acting shock is exerted, the upwardly pivoting pawl 8 acts with her finger 12 on the finger 13 such that the Pawl 9 is also pivoted upwards. A stop 14 arranged in the holding claw 2 may limit the pivoting movement of the Pawl 9 upwards.

The airing of the pawls 8 and 9 in the closed position according to Fig. 1 is ensured by a roller 15 which is freely rotatably mounted on a lever 16 and with the rear surface 8a the pawl 8 cooperates. The lever 16 is mounted on an axle 17, which in turn is mounted in the housing 1. One kinematic connection, which is controlled via a suitable control device, enables blocking or releasing of the lever 16 carrying the roller 15 so that it can perform a pivoting movement.

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e.g. the kinematic connection can comprise a rocker arm 18, which is connected on the one hand to the joint 19 with the lever 16 and on the other hand to the joint 20 with a lever 21, which can in turn rotate about an axis 22 which is carried by a part 23 connected to the housing 1. This lever 21, The rotary movement of which can be influenced by hand from the outside by means of a nut 22a is by means of a rocker arm 24 and a cranked lever 25 pivotably mounted about a fixed axis 26. The other arm of the cranked lever 25 has a stop 27 which rests against a hook stop 28.

A central control device enables the hook stop to be released 28. For example, the part 28 can be formed by one arm of a cranked lever 29, the other arm of which is at the point 30 is connected to the end of a piston rod 31, the movement of the piston rod by the gas expansion during combustion of a Powder charge is caused, which is arranged in a container 32.

An analog control device is described in FR-PS 73.10960. Instead of the pyrotechnic control device, any other system could also be used, such as an electrical control device with the aid of an interposed electromagnet, by means of which the piston rod 31 is displaced. In order to achieve joint control of the two devices ε and F, the lever 21 simultaneously moves a rocking lever 18 ¹ , which in turn is articulated to a lever 16 'of the device F, just like the lever 16 of the device E.

In addition, the setting of the holding claws 2, the upper one Part 3 can slide in the sleeve 4, in the vertical direction with

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Using a threaded bolt 35, which is in a threaded part of the retaining claws is screwed in and the head of which carries a nut 36 which protrudes from the housing 1 at the top.

If the upper portion of the housing is not accessible, then a side adjustment device can be provided, the one Has nut 37 with external teeth and a nut 38 with external teeth, as is the case, for example, in the upper part 4 is shown.

The device just described functions as follows when attached to an aircraft such as an airplane is:

The stop 2 8 is disengaged so that the lever 21 can be adjusted by hand is, and the roller 15 is at a distance from the pawls

8 and 9, which under the influence of gravity around the axis 6 (and 7) are rotated so that they are open as shown in FIG.

The load C is raised towards the aircraft so that the fastening rings A, which are fastened to the load, engage in the openings 40, which are provided for this purpose in the housing 1 under the retaining claws. These elongated openings 40 are used to center the mounting rings during insertion and at least partially on the housing during flight absorb acting forces. When the load is lifted, each ring A comes to rest against the upper finger 12 of the pawl 8. This Finger is pivoted about axis 6 and causes the pawl

9 is also pivoted in that the finger 12 presses against the finger 13. The lower fingers 10a, 10b and 11 of the pawls grip

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then into the ring A, and the rotary movement of the pawls is continued until the pawl 9 comes to rest against the stop 14 of the holding claw 2.

By rotating the nut 22a, the lever 21 is pivoted and thus the lever 16 so that the roller 15 comes to rest against the rear surface 8a of the pawl 8. At the same time, the attacks 27 and 2 8 engaged. The mechanical connection is blocked and the roller 15 holds the pawls 8 and 9 in the closed position, in which the load C is held.

By turning the nut 36 on the outside of the housing is accessible (or the nut 38, which is laterally accessible), the holding claws 2, against which the freely movable roller rests, are raised. The load C is thereby drawn against a solid surface, e.g. against the surface S of a part which is visible in FIG of the housing 1.

In order to disengage the load, it is sufficient to connect the kinematic connection e.g. to solve with the help of the pyrotechnic charge, the combustion of which the lever 28 is pivoted. Under the influence of the load of the cargo the latches will open. The load therefore presses the roller 15 immediately to the side, and the lower fingers 10a, 10b and 11 of the Latches release the load.

If necessary, the load C can also be ejected by means of pistons 41, which by part of the during the combustion of the Powder charge resulting gas are moved, which is passed via tubes 42 to the upper part of the cylinder containing the piston will. An embodiment of this type is described in the aforementioned patent specification.

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It should be pointed out once again that there is a possibility of unlocking the kinematic connection by hand. For example, an externally accessible threaded bolt 43 enables the lever 29 to be pivoted, which enables the stops to engage 2 8 and 27 of the levers 25 and 29 causes the hook stop 28 to disengage and the load can be released.

In addition, it can be provided that, instead of two pivotable pawls for each ring, only one such pawl 8 is provided could be, which is used in the manner described above.

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Claims (8)

PAT RNTiNWA LT E A. GRÜNECKER DfV-MMCl H. KINKELDEY OR ING W. STOCKMAIR 27A 0318 - - K. SCHUMANN DR RER NAT DtPL ■ FHYS P. H. JAKOB DlPLlNG G. BEZOLD DR FER NAT OK. OfM 8 MUNICH Q2 MAXIMILIANSTRASSE A3 P 11,961 claims 1. Device for picking up and dropping one with fastening rings equipped load under an airplane or a helicopter, characterized in that in one Housing (1) attached to the aircraft or helicopter is provided with a device (E, F) for each ring (A) of the load (C) is, which gripping devices (8,9) for each ring, which are adjustable in height, so that the load (C) against a Surface (S) of the housing (1) can be tightened. 2. Apparatus according to claim 1, characterized in that the gripping devices have at least one pawl (8,9) which is normally pivoted into its open position and at least a lower finger (10a, 10b, 11) which can engage in the ring (A) that a freely rotatably mounted roller (15) is provided is, which is adjustable by means of a kinematic connection (18,21, 24,26) against the pawl in order to this during the To block the transport of the load (C) in the closed position, and 809810/1 032 TKLEPON (OBS) 99 9ββ3 Telex os-aeaeo TELEQRAMS MONAPTH TELECOPER that a control device (29,31,32) is provided which adjusts the kinematic connection so that the roller (15) of the The pawl can be moved away and the pawl thereby opens during the release of the load (C). 3. Apparatus according to claim 2, characterized in that the gripping device has two pawls (8,9) which normally are pivoted into their open position, and each pawl has at least one lower finger (1Oa, 1Ob, 11), which can engage in the ring (A), and that a device (12, 13) is provided which ensures that during the rotary movement one pawl (8) is rotated with the other pawl (9), the freely rotatably mounted roller (15) then counteracting it one of the two pawls is applied. 4. Apparatus according to claim 3, characterized in that each pawl (8,9) has an upper finger (12,13), wherein the upper fingers are entangled, but touch each other in such a way that the pivoting movement of one pawl (8) is a pivoting movement the other pawl (9) causes the two upper fingers to lie against one another, and that a stop (14) is provided is, which limits the rotary movement of one pawl in one direction, while the rotary movement in the other direction in the closed position is limited by the freely moveable roller (15). 5. Device according to one of claims 2 to 4, characterized in that that the setting of the devices carrying the gripping devices (E, F) is made possible by means of a screw connection (35,36) which is accessible on the outside of the housing (1), the free rotatably mounted roller (15) rests against the device so that 809810/1032 the load can be drawn against the surface (S) connected to the housing (1). 809810/1032