JP2018197410A - Connection member - Google Patents

Abstract

To provide a connection member which has low risk of biting, which suppresses an influence on driving torque in the case where a coupling member drives, which has high strength and which has achieved both safety for preventing erroneous development and reliability for secure development in the case of being used in a developable structure.SOLUTION: A connection member 1 connects a first structure 2 and a second structure 3, and includes a mesh structure 11 in which a plurality of wire rods 111 are braided in a hollow shape so that a gap is formed between the wire rods. The wire rodes 111 can slide with each other at an intersection of the wire rods 111 with each other. In the connection member 1, one end part of the mesh structure 11 is connected to the first structure 2 and the other end of the first mesh structure 2 is connected to the second structure 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connecting member for securing two structures when they are separated.

  For example, a deployment structure such as a solar cell panel is accommodated in a rocket in a state of being connected to a structure such as an artificial satellite via a hinge portion. If the deployment structure such as this solar panel is accidentally deployed in the rocket, the hinge part may be destroyed by vibration during launch or flight of the rocket, resulting in the occurrence of falling objects on the ground. There is. In order to prevent such unfolding and occurrence of falling objects, an approach has been adopted in which the unfolding structure is attached to the structure by a hinge part and a latch part, and the latch part and the starting circuit are made redundant (described below). Non-patent document 1).

  In general, when the first structure body and the second structure body are separated, a connecting member such as a wire is used to connect them (see, for example, Patent Document 1).

JP 2017-66823 A

Kawashima Kazuno et al., "3M11 Small Demonstration Satellite Type 4 (SDS-4) Mechanism / Structure Development", Proceedings of the 56th Space Science and Technology Union Lecture Meeting, November 2012

  As described above, when the latch unit and the start-up circuit are made redundant, the number of parts is increased, and the signal lines and circuits for controlling the parts are increased in parallel. Reliability is reduced. In other words, there is a conflict between safety in terms of preventing erroneous deployment and reliability in terms of reliable deployment. In addition, an increase in the number of parts leads to an increase in cost.

  In addition, light weight parts may be secured with glass thread or the like for the purpose of preventing falling objects on the ground. This is not preferable because there is a risk of biting.

  Further, the wire or the like has a risk of biting when the first structure and the second structure are connected by a connecting member such as a rotating part, a joint part, or a sliding part. Further, if the wire is thickened to increase the strength, the rigidity of the wire increases, and there is a risk that when the rotating part or the joint part is driven, the driving torque is affected and the normal operation is hindered.

  Therefore, the present invention has a low risk of biting, suppresses the influence on the driving torque when the connecting member is driven, has a high strength, and is safe and reliable for preventing erroneous deployment when used in a deployment structure. An object is to provide a connecting member that achieves both the reliability of deployment.

  One aspect of the present invention is a connection member that connects a first structure and a second structure, and a plurality of wires are braided into a hollow shape so that a gap is formed between the wires. A mesh structure, wherein the wires are slidable at an intersection of the wires, one end of the mesh structure is connected to the first structure, and the first mesh A connection member is provided in which the other end of the structure is connected to the second structure.

  One aspect of the present invention is a connection member that connects a first structure and a second structure, and a plurality of wires are braided into a hollow shape so that a gap is formed between the wires. A first mesh structure, and a second mesh structure that is disposed in an inner space of the first mesh structure and in which a plurality of wires are braided into a hollow shape so that a gap is formed between the wires. The wire rods are slidable with each other at the intersection of the wire rods, and one end portion of the first mesh structure and one end portion of the second mesh structure are A connection member connected to the first structure, wherein the other end of the first mesh structure and the other end of the second mesh structure are connected to the second structure. Is to provide.

  The first mesh structure and / or the second mesh structure may have a shape that tapers toward an end.

  At least one end of the first mesh structure and / or at least one end of the second mesh structure may be closed.

  At least one of the wires may be a communication line.

  The connecting member may be such that at least in the initial state, the first mesh structure and the second mesh structure are self-supporting in an arc shape protruding outward.

  The first structure and the second structure may be connected to each other so as to be displaceable.

  The first structure may be a spacecraft main body, and the second structure may be a space deployment structure.

  The first structure and the second structure may be connected to a joint portion of a robot.

  The first structure may be a drone, and the second structure may be a camera mounted on the drone.

  The first structure may be a drone, and the second structure may be a cargo mounted on the drone.

  According to the present invention having the above-described configuration, the risk of biting is low, the influence on the driving torque is suppressed when the connecting member is driven, the strength is high, and safety that prevents erroneous deployment when used in a deployed structure. A connecting member that balances reliability and reliability of reliable deployment is provided.

It is a perspective view in the state where the connection member concerning a 1st embodiment of the present invention was connected to the case and the deployment structure, and the deployment structure was developed. It is a side view of the state where the connection member concerning a 1st embodiment of the present invention was connected to the case and the expansion structure, and the expansion structure was stored. It is a side view of the state where the connection member concerning a 1st embodiment of the present invention was connected to the case and the deployment structure, and the deployment structure was developed. It is a partial expansion perspective view of a mesh structure. It is a perspective view of the state where the connection member concerning a 2nd embodiment of the present invention was connected to the case and the deployment structure, and the deployment structure was developed. It is a figure which shows the example which applied the connection member of embodiment of this invention to the joint part of the robot. It is a figure which shows the example which applied the connection member of embodiment of this invention to the drone. It is a figure which shows another example which applied the connection member of embodiment of this invention to the drone.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a perspective view of a state in which a connecting member according to a first embodiment of the present invention is connected to a housing and a deployment structure, and the deployment structure is deployed, and FIG. 2 is a first embodiment of the present invention. FIG. 3 is a side view of a state in which the connection member according to the embodiment is connected to the housing and the unfolding structure and the unfolding structure is accommodated, and FIG. 3 is a diagram illustrating the connection member according to the first embodiment of the present invention. It is a side view of the state where it connected to the thing and the deployment structure was developed. FIG. 4 is a partially enlarged perspective view of the mesh structure.

  The connecting member 1 is composed of a hollow mesh structure 11.

  In the mesh structure 11, the wire 111 is braided into a hollow shape so that a gap is formed between the wires.

  The wire 111 is not particularly limited as long as it has flexibility, the tensile strength according to the mass of the connected body of the connecting member 1, the resonance frequency generated with the operation of the connected body, and the usage environment (mainly In view of temperature, humidity, and ultraviolet intensity), the material, shape, and thickness can be appropriately selected.

  Examples of materials that can be used for the wire 111 include carbon fiber, basalt fiber, para-aramid fiber, meta-aramid fiber, ultrahigh molecular weight polyethylene fiber, polyarylate fiber, PBO (polyparaphenylene benzoxazole) fiber, Polyphenylene sulfide (PPS) fiber, polyimide fiber, fluorine fiber, polyvinyl alcohol (PVA fiber), glass fiber, polyamide fiber, polyester fiber, polyethylene fiber, polypropylene fiber and the like can be used. These fibers may be monofilament yarns or knitting yarns. Further, at least one of the wires 111 may be a communication line such as an optical fiber. By connecting at least one of the wires 111 to a communication line such as an optical fiber, the connection member 1 can communicate between the first structure and the second structure.

  The surface of the wire 111 can be covered with a resin. Since the intersections of the wires 111 are not fixed and are slidable with each other, they can be used for the purpose of reducing the coefficient of friction and reducing damage caused by sliding. As a coating material that can be preferably used, for example, a fluorine-based coating (PTFE, PFA, FEP, etc.) can be used for the purpose of reducing the friction coefficient. Also, a polyimide coating (PI, PEI, etc.) can be used for the purpose of imparting insulation, or aluminum or titanium can be deposited or sputtered or ion-plated for the purpose of adjusting the surface optical characteristics. Moreover, these can also be used in combination.

  The cross-sectional shape of the wire 111 is preferably selected to be a circle or an ellipse in consideration of the frictional resistance when sliding at the intersection and the deformation of the hollow shape of the mesh structure 11 when tension and stress are applied. .

  As shown in FIG. 4, the mesh structure 11 is braided so that the wire 111a knitted in the first direction and the wire 111b knitted in the second direction have an intersection angle θ and a gap pitch a. ing.

  The wire 111a and the wire 111b may be the same material or shape, or may be different materials and shapes. The crossing angle θ and the gap pitch a can be determined in consideration of the required strength, the unfolding operation range, and the resistance torque.

  The mesh structure 11 has a shape that tapers toward the end. When the shape is tapered toward the end portion, that is, the cross-sectional area of the end portion is smaller than the cross-sectional area of the central portion, buckling hardly occurs due to the compressing force applied from the outside. For example, when the unfolded structure 33 connected by the connecting member 1 shifts from the housed state as shown in FIG. 2 to the unfolded state shown in FIG. 3, a compressive force is applied to the mesh structure 11. However, buckling is less likely to occur. However, the shape of the mesh structure is not limited to this, and may be a columnar shape or a shape that expands toward the end.

One end of the mesh structure 11 is connected to the first auxiliary member 21, and the other end of the mesh structure 11 is connected to the second auxiliary member 31. The first auxiliary member 21 is attached to the housing 23, and the second auxiliary member 31 is attached to the development structure 33. The first auxiliary member 21 and the housing 23 constitute the first structure 2, and the second auxiliary member 31 and the unfolded structure 33 constitute the second structure 3. As the housing | casing 23 and the expansion | deployment structure 33, it is an artificial satellite main body and a solar cell panel, for example.
Note that the first auxiliary member 21 and the second auxiliary member 31 may be part of the connecting member 1.

Any known method can be used to connect the end of the mesh structure 11 to the first auxiliary member and the second auxiliary member, and can be appropriately selected in view of the strength and durability of the connection. Is possible. That is, fusion, adhesion, fitting, screwing, etc. can be selected.

  The casing 23 and the deployment structure 33 are connected to each other via the hinge portion 4 so as to be rotatable.

  The connecting member 1 is configured such that the mesh structure 11 is self-supporting in an arc shape protruding outward.

  The operation of the connecting member 1 configured as described above will be described below.

  Since the connecting member 1 is composed of a braided wire, the tensile strength is high, and when the first structure 2 and the second structure 3 are separated due to breakage of the connecting portion or the like, the connecting members 1 are connected to each other. Can do.

  Since the connecting member 1 is configured so that the first mesh structure 11 is self-supporting in a convex arc shape outward, the connecting member 1 is moved when the unfolding structure 33 shifts to the unfolding state. The first structural body 2 and the second structural body 3 are not bitten by a hinge portion that is a member that connects the first structural body 2 and the second structural body 3 so as to be displaceable.

  Further, although the wire rods 111 are in contact with each other at the intersection point, the intersection point between the wire rods 111 is not fixed. Therefore, when receiving vibration, the wire rods 111 can slide with each other. By friction, part of vibration energy is converted into heat and sound, and vibration energy is easily dissipated.

  Further, by appropriately selecting the material and thickness of the wire, the braiding angle, the interval between the wires, and the like, the influence on the driving torque can be minimized.

(Second Embodiment)
FIG. 5 is a perspective view of a state in which the connecting member according to the second embodiment of the present invention is connected to the housing and the unfolding structure, and the unfolding structure is unfolded. In FIG. 5, parts corresponding to those in FIG.

  The connecting member 1 includes a first mesh structure 11 having a hollow shape and a second mesh structure 13 having a hollow shape arranged in an inner space of the first mesh structure 11.

  In the first mesh structure 11, the wire 111 is braided into a hollow shape so that a gap is formed between the wires. Similarly, in the second mesh structure 13, the wire 111 is braided into a hollow shape so that a gap is formed between the wires. In the present embodiment, each mesh structure is configured by braiding 32 wires.

  Moreover, the 1st mesh structure 11 and the 2nd mesh structure 13 have a shape which tapers toward an edge part similarly to 1st Embodiment.

  In the present embodiment, the wire of the first mesh structure 11 and the wire of the second mesh structure 13 are made of the same type of material, but the wire of the first mesh structure 11 and the second mesh structure 11 are the same. Since the mesh structure 13 has different shapes, the resonance frequency is different. Note that different materials may be used for the wire of the first mesh structure 11 and the wire of the second mesh structure 13.

  One end of the first mesh structure 11 and one end of the second mesh structure 13 are connected to the first auxiliary member 21, and the other end of the first mesh structure 11 The other end of the second mesh structure 13 is connected to the second auxiliary member 31. The first auxiliary member 21 is attached to the housing 23, and the second auxiliary member 31 is attached to the development structure 33. The first auxiliary member 21 and the housing 23 constitute the first structure 2, and the second auxiliary member 31 and the unfolded structure 33 constitute the second structure 3.

  The casing 23 and the deployment structure 33 are connected to each other via the hinge portion 4 so as to be rotatable.

  The connecting member 1 is configured such that the first mesh structure 11 and the second mesh structure 13 are self-supporting in a convex arc shape outward.

  The operation of the connecting member 1 configured as described above will be described below.

  Here, when the first structure 2, the second structure 3, and the connection member 1 are subjected to vibration, the connection member 1 is composed of mesh structures having different resonance frequencies. When the frequency of the vibration is close to the resonance frequency of one mesh structure, the one mesh structure vibrates. However, since the other mesh structure does not resonate due to external vibration, it is not easily affected by external vibration. As a result, since the connection member 1 as a whole becomes independent, the risk of the connection member 1 being caught in a hinge portion that is a member that connects the first structure 2 and the second structure 3 to each other so as to be displaceable is suppressed. can do.

  In the above embodiment, the connecting member is composed of two mesh structures, but the connecting member may be composed of a nested structure of three or more mesh structures.

  In the above embodiment, one connection member is connected to one pair of auxiliary members. However, two pairs of auxiliary members are prepared, and two connection members are stacked against two pairs of auxiliary members. You may connect with. According to such a configuration, when the first structure body and the second structure body are separated, it can be more effectively connected.

(Modification)
FIG. 6 is a diagram illustrating an example in which the connection member 1 of the above embodiment is applied to a joint portion of a robot.

  As shown in FIG. 6, the connection member 1 is connected to the head 72 and the body 72 connected to the joint 71 of the robot 7, and the upper arm 75 and the forearm 76 connected to the joint 74. ing. By using the connection member 1 according to the above embodiment, the head portion 72 is separated from the body portion 73 or the forearm portion 76 is provided, for example, by destroying the joint portions 71 and 74 while exhibiting the above effects. When separated from the upper arm 75, the head 72 and the forearm 76 can be tied together to prevent the fall.

  Moreover, FIG. 7 is a figure which shows the example which applied the connection member 1 of the said embodiment to the drone (unmanned flying body).

  As shown in FIG. 7, the connecting member 1 is connected between the drone main body 82 connected to the movable connecting portion 81 of the drone 8 and the camera 83 (optical device). By using the connecting member 1 of the above embodiment, the camera 83 is secured when the camera 83 is separated from the drone body 82 due to the movable connecting portion 81 being broken or the like while exhibiting the above effects. Can prevent falling.

  Moreover, FIG. 8 is a figure which shows another example which applied the connection member 1 of the said embodiment to the drone.

  As shown in FIG. 8, the connection member 1 is connected to the luggage 9 held by the holding portion 84 of the drone 8 and the drone body 82. By using the connecting member 1 of the above embodiment, when the load 9 is separated from the drone 8 due to the gripping portion 84 being broken or the like while exhibiting the above effects, the cargo 9 is locked and dropped. Can be prevented.

  Although the present invention has been described above with reference to several embodiments for purposes of illustration, the present invention is not limited thereto, and forms and details are within the scope and spirit of the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made.

DESCRIPTION OF SYMBOLS 1 Connection member 11 (1st) mesh structure 13 2nd mesh structure 111 Wire 2 1st structure 21 1st auxiliary member 23 Case 3 2nd structure 31 2nd auxiliary member 33 Expansion | deployment Structure 4 Hinge part 7 Robot 71 Joint part 72 Head part 73 Body part 74 Joint part 75 Upper arm part 76 Forearm part 8 Drone 81 Movable connecting part 82 Drone body 83 Camera 84 Holding part 9 Cargo

Claims (11)

A connecting member for connecting the first structure and the second structure,
A mesh structure in which a plurality of wires are braided into a hollow shape so that voids are formed between the wires,
The wires are slidable with each other at the intersection of the wires,
A connecting member, wherein one end of the mesh structure is connected to the first structure, and the other end of the mesh structure is connected to the second structure. A connecting member for connecting the first structure and the second structure,
A first mesh structure in which a plurality of wires are braided into a hollow shape so that voids are formed between the wires,
A second mesh structure which is arranged in an inner space of the first mesh structure and a plurality of wires are braided into a hollow shape so that a gap is formed between the wires;
With
The wires are slidable with each other at the intersection of the wires,
One end of the first mesh structure and one end of the second mesh structure are connected to the first structure, and the other end of the first mesh structure A connection member, wherein the other end of the second mesh structure is connected to the second structure.   The connection member according to claim 1, wherein the mesh structure, or the first mesh structure and / or the second mesh structure has a shape that tapers toward an end portion.   The connection member according to claim 3, wherein at least one end of the mesh structure or the first mesh structure and / or at least one end of the second mesh structure are closed.   The connection member according to claim 1, wherein at least one of the wires is a communication line.   2. The connection member has at least an initial state in which the mesh structure, or the first mesh structure and the second mesh structure are self-supporting in an arc shape protruding outward. The connecting member according to any one of -5.   The connection member according to claim 1, wherein the first structure body and the second structure body are coupled to each other so as to be displaceable.   The connection member according to claim 1, wherein the first structure is a spacecraft main body, and the second structure is a space deployment structure.   The connection member according to claim 1, wherein the first structure body and the second structure body are coupled to a joint portion of a robot.   The connection member according to claim 1, wherein the first structure is a drone, and the second structure is a camera mounted on the drone.   The connection member according to claim 1, wherein the first structure is a drone, and the second structure is a cargo mounted on the drone.

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