JPS6250360B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for suspending and latching cargo supported on the underside of an aircraft.

Loads supported on the underside of an aircraft generally have two rings or two so-called saddles spaced apart from each other. These rings or saddles can be engaged by corresponding hook means of the locking mechanism.

This type of device was developed by the applicant in October 1978.
As described in UK Patent Application No. 40011/78 filed on 10 May, the load (fixed to the supporting device or to the fuselage of the aircraft) is locked in place by additional upward movement of the hook means. It is becoming more and more common. In contrast, other known proposals involve lowering the load bearing point by either translating the load downward or by pivoting about a fixed pivot member supported by a gripping arm. It's getting old.

Additionally, a number of devices have been proposed for wedging in the form of small jacks placed at the end of a fixed arm placed on top of a load, each of which has various advantages. However, on the other hand, it also has various drawbacks.

The particular advantage of the device described in the said British patent application is that it uses, on the one hand, a connecting rod mechanism similar to a directional serpentine rod and, on the other hand, a central wedging control mechanism which can act very quickly. This means that the stress is evenly distributed between the two hook means. As previously mentioned, this device is characterized in that the hook means move upwards simultaneously in a complementary manner.

However, it is necessary that the upper part of a load supported on an aircraft, regardless of its shape, be located at a well-defined height relative to the support device, or that loads of different diameters may be wedged in support. In some cases, the necessary complementary movements of the hook means are often impossible or insufficient.

The device of the present invention has the features of the above-mentioned British patent application.
In addition to having the advantages of evenly distributing stress between the hooks and centrally controlling the wedging action, it also has the advantage of locking the load member by lowering the bearing point, which will be explained later. The present invention provides a device that can adjust the height to an accurately determined height.

The device according to the invention consists of a set of pivotable suspension hooks juxtaposed along the longitudinal axis of the package so as to be able to engage the rings of the package, the suspension hooks being pivotable about a fixed pivot member. The swinging member is pivotally connected to triangular crank levers 7 and 8 attached to a support device, the crank levers are connected to each other by a connecting rod, and the swinging member is provided with a swinging member that holds the suspension hook in the load supporting position with a claw. vertically movable bearing members which are in communication with each other via a linkage mechanism and which are driven by a central control mechanism into engagement with a load at a position near two longitudinally spaced hooks; It is characterized by having been provided.

Preferred embodiments of the invention will now be described with reference to the accompanying drawings.

With reference to FIG. 1, reference numeral 1 indicates a support device, reference numeral 2 indicates a load, reference numerals 3 and 4 indicate rings attached to the load 2, and reference numerals 5 and 6 indicate suspension hooks that engage the rings 3 and 4. 7 and 8 designate triangular bellcrank levers supported on the support device 1 by fixed pivot members 9 and 10, respectively. Hooks 5 and 6 are levers 7 and 8, respectively.
is pivotally supported at the ends 11, 12 of.
The ends 15, 16 of the levers 7, 8 are connected to each other by a connecting rod 19. Other fixed pivot members 20, 21 correspond to arms 22, 23, respectively.
Hooks 5 and 6 are connected to these arms 22 and 23 via links 24 and 25, and these links 24 and 25
are pivotally connected to the hook members 5, 6 via associated crank pins 26, 27 and further pivot members 28, 29, respectively. If desired, the axes of pivot members 20, 21 can be merged with the axes of pivot members 9, 10, respectively. One end of connecting rods 30, 31 is pivotally connected to the ends 26, 27 of the arms 22, 23, and the other ends of these connecting rods are connected to a common swinging member 32.
is pivotally connected to the Therefore, the connecting rods 3 connected to each other by the crank pins 26, 27
0, 31, arms 22, 23, link 24,
Reference numeral 25 forms a link mechanism for rotating the suspension hooks 5 and 6 between the cargo fixing position and the release position.

According to one known arrangement, these connecting rods 3
The axis of 0,31 is brought relatively close to the axis of the pivot shaft 33 of the rocker member 32 to provide a significant stress reduction ratio, and is therefore designated by the reference numeral 34, which does not form part of the invention. The use of one such claw is sufficient to prevent the hooks 5, 6 from being unintentionally released. The hooks are thus released or opened, so that the load supported on them can apply force in the direction of arrow F to this pawl 34, if necessary, to rotate this pawl 34 counterclockwise. Released or freed by known means.

Also shown in FIG. 1 are V-shaped bearing members 40, 41 which engage the top surface of the load 2. The legs of the V-shaped bearing members 40, 41 are shown at 42, 43, respectively, behind the plane of FIG.

Reference numerals 44 and 45 indicate bearing members 40 and 41, respectively.
The cylindrical sliding part is shown. Threaded portions 46, 47 are provided on the upper portions of the sliding portions 44, 45, and control screw members 48, 49 having bevel gears 50, 51 protruding from their heads, respectively, connect these screw portions 46, 47.
These control screw members 48, 49 may also include ball-type or needle-type thrust bearings depending on whether the thrust reaction force is directed in an upward or downward direction, as described below. The cylindrical sliding parts 44, 45 are respectively slidably fitted into fixing sleeves 56, 57 which are fixed to the support device 1. However, these cylindrical sliding parts 4
4, 45 are held against rotation not only by the baggage but also by known means such as a groove and nut combination (not shown).

The bevel gears 50 and 51 are always meshed with the bevel pinions 58 and 59, respectively.
8 and 59 are simultaneously driven by rotary shafts 60 and 61, respectively, which are driven by a central drive mechanism 62 consisting of a set of bevel gears 63, 64, and 65;
1, and the intermediate bevel gear 65 drives two bevel gears 63, 64 as shown. This intermediate drive bevel gear 65 has a shaft 6 with a square cross section.
6 or any other suitable drive means.
This drive bevel gear 65 can be mounted on either one of the two bevel teeth 50 or 51 in order to simplify the device, if efficiency can be improved in one of the bearing members without any inconvenience.
One can also be placed vertically.

In Figure 2, numeral 2 indicates luggage, numeral 3
indicates a ring fixed to the load 2, 42 indicates the leg of the V-shaped bearing member, 44 indicates the sliding part of the bearing member within the fixed sleeve 56, and the arrow indicates for wedging the load. Indicates the direction of vertical sliding movement required.

FIG. 3 shows in end view a linkage consisting of a sliding portion 70 which engages in sliding engagement with a hole in a fixed sleeve 71. A pair of pivot arms 72, 73 are provided at the lower end of this sleeve 71, and these pivot arms constitute the intersection of a pair of lever arms 74, 75 of the bearing member of the gripper lock. Opposite ends 76, 77 of these lever arms 74, 75 are pivotally connected to a pair of links 78, 79, respectively, which are connected to pivot members 80, 81, respectively.
It is attached to the sliding part 70 by.

The operation of the apparatus shown in FIGS. 1 to 3 will be explained below first with reference to the specific example shown in FIGS. 1 and 2. Initially, the forces transmitted from the rings 3, 4 to the corresponding hooks 5, 6 cause these hooks to rotate about their respective pivot members 11, 12 in the direction of the arrow shown in FIG. Therefore, the connecting rods 30 and 31 are always subjected to compressive force, and the swinging member 32
is pressed against the claw 34. This arrangement is similar to that described in the above-mentioned UK Patent Application No. 40011/78, except that the triangular or bellcrank levers 7, 8 are no longer connected to each other by telescopic screws. It is different from the one in the application. The action of this telescopic screw is 2 in the modified example of the present invention.
This is achieved by one connecting rod 19 which evenly distributes the stress between the two hooks. In fact, the pivot member 11 associated with the triangular crank lever 7 on the left, which is pushed downward by the stress applied to the hook 5 by the ring 3, is fixed only by the traction force exerted on the triangular crank lever 7 by the connecting rod 19. held in position, this traction force is necessarily offset by an equal and opposite traction force exerted by the connecting rod 19 on the other triangular crank lever 8 holding the hook 6. This combination, which is equivalent to a directional heave or a compensator, distributes the entire load equally between the two hooks, so that overloading one hook is avoided by the other hook.

As previously mentioned, the load rotates the bevel gear 65 and thus the bevel gears 50,5 of the threaded members 48,49.
1 and 2 are wedged by one central control mechanism 62 which simultaneously drives driven bevel gears 63, 64 fixed to one end of a shaft 60, 61 which supports at the other end pinions 58, 59 meshing with one another. When the screw members 48 and 49 rotate in this manner, the bearing members 40 and 41 guided within the sleeves 56 and 57, respectively, move downward until they come into engagement with the load 2. In this case, the reaction forces are balanced by the pair of thrust bearings 52, 53 due to the stress that is intentionally pre-applied to the load 2.

An alternative wedging action is obtained by using the same central control mechanism 62 but reversing the direction of rotation of screw members 48, 49 and utilizing a configuration such as that shown in FIG. When bevel gear 65 is rotated clockwise (as viewed from FIG. 3), sliding member 70 is moved upwardly within sleeve 71, thus
Pull the links 78 and 79 upwards to remove the pivot member 7.
lever arm 74 of the bearing member via 6, 77;
Rotate 75. These two lever arms 7
4 and 75 pivot around fixed pivot members 72 and 73 to apply pressure to the load 2 and hold it from rotating. The reaction force due to the prestress applied by the bearing member to the load 2 is balanced by the thrust bearings 54, 55 in this case.

Of course, the device shown in FIGS. 1 to 3 can also be used with double hook means corresponding to so-called saddle elements originally provided on the luggage for supporting the luggage on the underside of the aircraft.

In some cases, cargo supported on the underside of an aircraft may have a generally flat top surface or, in contrast, a cylindrical surface of relatively small radius. Under these conditions, the distance of movement between the two permissible limit points of the wedged lever arm shown in FIG. Apply force. On the other hand, loads supported on the underside of the aircraft may reach such high values that the overall dimensions of the overloaded links become prohibitively high. This problem is linked to 78,7
9 is solved by using a device in which the ends of the lever arms 74, 75 are pivotally connected directly to the sliding member and are driven in a vertical sliding movement.

On the other hand, the stresses exerted on hooks of the type shown in FIG. It may also be counterbalanced by equivalent means consisting of moving gears, so that this central control mechanism controls all loads supporting cargo on the underside of the aircraft that do not include a hook operatively connected to a mechanism equivalent to a directional gear. Can be applied to equipment.

Since the device of the present invention has the above-described configuration, the load is locked using a set of hooks and a set of bearing members, so that the load can be reliably locked and the load can always be supported at a constant height. can.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional front view showing the suspension hook in a fixed position, and Fig. 2 shows the V-shaped bearing member vertically moved and pulled down to engage the load. FIG. 3 is a partially longitudinal side view of the apparatus shown in FIG. 1 showing the position thereof, and FIG. 3 is a partially longitudinal side view of the apparatus shown in FIG. 2 showing a modified example of the bearing member. 1... Support device, 2... Luggage, 5, 6... Suspension hook, 7, 8... Crank lever, 9, 10...
...Pivot member, 19...Connection rod, 22, 23...
... Arm, 32 ... Swinging member, 34 ... Claw, 4
0, 41... Bearing member, 62... Central control mechanism.

Claims (1)

[Claims] 1. Consists of a pair of rotatable suspension hooks 5, 6 juxtaposed along the longitudinal axis of the load 2 so as to be able to engage rings 3, 4 provided on the load 2; The suspension hooks 5, 6 are pivotally connected to triangular crank levers 7, 8 which are rotatably attached to the support device 1 about fixed pivot members 9, 10, and the crank levers 7, 8 are connected to each other by a connecting rod 19. The suspension hooks 5 and 6 are communicated with each other via a swinging member 32 that holds the suspension hooks 5 and 6 at the load fixing position by claws 34 and a link mechanism provided in the swinging member 32, so that the suspension hooks 5 and 6 are kept constant in the longitudinal direction. a bearing member 40 driven into engagement with the load 2 by the central control mechanism 62 at a location near the two spaced apart hooks;
41 is provided on the supporting device 1 so as to be movable in the vertical direction. 2. The bearing members 40 and 41 are composed of a swinging member 70 that moves within a fixed sleeve 71 provided in the support device 1, and a pair of lever arms 74 and 75 are rotatably pivoted to the lower end of the fixed sleeve 71. According to claim 1, one end of the lever arm is pivotally attached to the sliding member 70 via links 78, 79 so that the other end of the lever arm 74, 75 can engage the cargo. equipment.