Wing opening / closing device

Abstract

To provide a wing opening / closing device capable of contracting its total length even if a rotary screw element can no longer be rotated while a wing is in the open state.SOLUTION: A wing opening / closing device includes a lock mechanism 21 that is capable of switching between a locked state that prevents a screw-side element 52 from rotating at least in a direction in which the wing is closed relative to a counter-screw-side element 53 and an unlocked state that allows the screw-side element 52 to rotate at least in the direction in which the wing is closed relative to the counter-screw-side element 53.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a wing opening / closing device for a wing truck.

Background Art

[0002] In a logistics truck, wing trucks configured to be able to load and unload goods from the vehicle width direction with respect to a loading platform having a rectangular box shape are widespread.

[0003] The loading platform of a wing truck is provided with wings in which a roof panel and a side panel are integrated on both sides in the vehicle width direction. The end of the roof panel constituting the wing on the center side in the vehicle width direction is connected to a fixed frame that does not rotate or displace with respect to the chassis even when the wing is opened and closed, so as to be able to swing around a swing axis facing the front-rear direction. A wing opening / closing device is installed between the front end and / or the rear end of the roof panel constituting the wing and the fixed frame of the loading platform. Based on the expansion and contraction of the wing opening / closing device, the wing swings with respect to the fixed frame of the loading platform, thereby opening and closing the wing.

[0004] Specifically, when the wing opening / closing device extends, the wing swings in the opening direction, and when the wing opening / closing device contracts, the wing swings in the closing direction.

[0005] As the wing opening / closing device, it is common to use a hydraulic cylinder that operates hydraulically. However, when using a hydraulic cylinder, it is necessary to install many devices such as hydraulic piping for supplying hydraulic pressure to the hydraulic cylinder, a hydraulic pump for generating hydraulic pressure, and an electric motor for driving the hydraulic pump, and the wing opening / closing equipment is likely to be enlarged and / or complicated as a whole.

[0006] On the one hand, Japanese Patent Application Laid-Open No. 2014-190436 describes a wing opening / closing device configured to include an electric actuator. The wing opening / closing device described in Japanese Patent Application Laid-Open No. 2014-190436 includes a ball screw mechanism in which a plurality of nuts are screwed onto a screw shaft via a plurality of balls, and an electric actuator including an electric motor and a speed reduction mechanism. By rotationally driving the nut, which is a rotary screw element, via the speed reduction mechanism by the electric motor, the screw shaft, which is a linear screw element, is relatively displaced axially with respect to the nut, and based on this, it is configured to expand and contract the overall length. By using such a wing opening / closing device, the installation of hydraulic equipment such as hydraulic piping and hydraulic pumps becomes unnecessary, and thus the wing opening / closing equipment can be miniaturized and simplified.

[0007] Also, in the conventional structure described in Japanese Patent Application Laid-Open No. 2014-190436, the electric actuator further includes a brake mechanism (electromagnetic brake) that automatically applies a braking force when the power supply to the electric motor is cut off. By this braking force, it is possible to prevent the wing in the open state from closing due to its own weight. Further, the brake mechanism (electromagnetic brake) has a manual release function that enables manual release of the braking force when a failure occurs in the power supply system. By releasing the braking force by this function, it is possible to close the wing in the open state.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0009] In the conventional wing opening / closing device described in Japanese Patent Application Laid-Open No. 2014-190436, when a physical defect such as a failure occurs in the electric actuator (including the manual release function of the brake mechanism) for some reason with the wing in the open state, and as a result, the nut, which is a rotating screw element, cannot be rotated, the wing opening / closing device cannot be contracted to close the wing.

[0010] Also, as a method for preventing the wing in the open state from closing due to its own weight by the wing opening / closing device, instead of incorporating a brake mechanism (electromagnetic brake) into the electric actuator, it is conceivable to use one having a self-locking mechanism as a speed reduction mechanism of the electric actuator. Also in this case, when a physical defect or an energization system failure occurs in the electric actuator for some reason with the wing in the open state, and as a result, the rotating screw element cannot be rotated, the wing opening / closing device cannot be contracted to close the wing.

[0011] An object of the present disclosure is to provide a wing opening / closing device having a configuration capable of closing the wing by contracting the entire length even when the rotating screw element cannot be rotated with the wing in the open state.

Means for Solving the Problem

[0012] The wing opening / closing device according to the first aspect of the present disclosure is a wing opening / closing device used for performing the opening / closing operation of a wing swingably supported with respect to a fixed frame on a loading platform of a wing vehicle, a frame-side member having a frame-side swing support portion swingably supported with respect to the fixed frame, a wing-side member having a wing-side swing support portion swingably supported with respect to the wing, A screw mechanism including a screw shaft and a nut screwed directly or via balls to the screw shaft, wherein one of the screw shaft and the nut, which is a rotating screw element, is supported by only one of the frame side member and the wing side member so as to be rotatable, and the other of the screw shaft and the nut, which is a linear motion screw element, is coupled to the other of the frame side member and the wing side member or is integrally formed with the other member. An electric actuator for rotationally driving the rotating screw element. Comprising: The other member is: A screw side element coupled to the linear motion screw element or integrally formed with the linear motion screw element. Including the wing side swing support portion or the frame side swing support portion, and an anti-screw side element combined to enable relative rotation with respect to the screw side element, and A lock mechanism capable of mutually switching between a locked state in which rotation of the screw side element with respect to the anti-screw side element in at least the direction in which the wing closes is blocked and a non-locked state in which rotation of the screw side element with respect to the anti-screw side element in at least the direction in which the wing closes is allowed. Having.

[0013] The wing opening / closing device according to the second aspect of the present disclosure is the wing opening / closing device according to the first aspect of the present disclosure, wherein The lock mechanism has an engaging member detachably spanned between the screw side element and the anti-screw side element, and switching to the locked state is achieved by engaging the engaging member with both the screw side element and the anti-screw side element, and switching to the non-locked state is achieved by disengaging the engaging member from at least one of the screw side element and the anti-screw side element.

[0014] The wing opening / closing device according to the third aspect of the present disclosure is the wing opening / closing device according to the second aspect of the present disclosure, wherein The screw side element has a recess at at least one location in the circumferential direction. The lock mechanism is supported and fixed to the reverse screw side element, and has a lock cylinder into which the engagement member is fitted. By engaging the tip of the engagement member with the recess, it switches to the locked state, and by disengaging the engagement between the tip of the engagement member and the recess, it switches to the unlocked state.

[0015] The wing opening and closing device according to the fourth aspect of the present disclosure is the wing opening and closing device according to the third aspect of the present disclosure, The engagement member has a lock piston fitted inside the lock cylinder and an engaging element held at the tip of the lock piston.

[0016] The wing opening and closing device according to the fifth aspect of the present disclosure is the wing opening and closing device according to any one of the second to fourth aspects of the present disclosure, The lock mechanism has a biasing spring that applies an elastic force in a direction to engage the engagement member with both the screw side element and the reverse screw side element, and a release mechanism for releasing the application of the elastic force to the engagement member.

[0017] The wing opening and closing device according to the sixth aspect of the present disclosure is the wing opening and closing device according to the fifth aspect of the present disclosure, The release mechanism is configured to include a push-pull cable.

Advantages of the Invention

[0018] According to the wing opening and closing device of one aspect of the present disclosure, even when it becomes impossible to rotate the rotary screw element with the wing in the open state, the overall length can be contracted and the wing can be closed.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

DETAILED DESCRIPTION OF THE INVENTION

[0020] [First Example] The first example of the embodiment of the present disclosure will be described with reference to FIGS. 1 to 4.

[0021] FIG. 1 shows a wing vehicle 2 incorporating the wing opening / closing device 1 of this example.

[0022] The wing vehicle 2 includes a loading platform 3 having a rectangular box shape in the closed state. The loading platform 3 includes a bottom 4, a front panel 5, a rear frame 6, an upper center frame 7, a pair of rear doors 8, a pair of fender plates 9, a pair of wings 10, and a plurality of wing opening / closing devices 1.

[0023] The bottom 4 has a rectangular flat plate shape extending in the front-rear direction when viewed from above, and constitutes the lower part of the loading platform 3. The bottom 4 is supported and fixed to the upper part of the rear side portion of the chassis 11 of the wing vehicle 2, which is behind the cabin 12.

[0024] The front panel 5 has a rectangular flat plate shape when viewed from the front-rear direction, and constitutes the front side portion of the loading platform 3. The lower end portion of the front panel 5 is coupled and fixed to the front end portion of the bottom 4.

[0025] The rear frame 6 has a rectangular frame shape when viewed from the front-rear direction, and constitutes the outer peripheral portion of the rear side portion of the loading platform 3. The lower end portion of the rear frame 6 is coupled and fixed to the rear end portion of the bottom 4.

[0026] The upper center frame 7 has a beam shape extending in the front-rear direction, and constitutes the central portion in the vehicle width direction of the upper side portion of the loading platform 3. The upper center frame 7 is spanned between the central portion in the vehicle width direction of the upper end portion of the front panel 5 and the central portion in the vehicle width direction of the upper end portion of the rear frame 6. The front end portion of the upper center frame 7 is coupled and fixed to the central portion in the vehicle width direction of the upper end portion of the front panel 5, and the rear end portion of the upper center frame 7 is coupled and fixed to the central portion in the vehicle width direction of the upper end portion of the rear frame 6.

[0027] Among the loading platform 3, the bottom 4, the front panel 5, the rear frame 6, and the upper center frame 7 are fixed frames that do not rotate or displace with respect to the chassis 11 when opening and closing the wing 10 or when loading and unloading goods.

[0028] A pair of rear doors 8 constitute the rear side portion of the loading platform 3 together with the rear frame 6. The pair of rear doors 8 are assembled inside the rear frame 6 so as to be able to open and close in a double-leaf manner.

[0029] A pair of deflector plates 9 constitute the lower side portions on both sides in the vehicle width direction of the loading platform 3. The lower end portion of each deflector plate 9 is connected to the end portion in the vehicle width direction of the bottom 4 so as to be able to swing about an axis facing the front-rear direction. By swinging and displacing each deflector plate 9 outward in the vehicle width direction, the deflector plate 9 can be opened and closed.

[0030] A pair of wings 10 constitute upper portions on both sides in the vehicle width direction of the loading platform 3. Each wing 10 is formed by combining a roof panel 13 and a side panel 14 so as to be L-shaped when viewed from the front-rear direction. That is, each wing 10 has, in a closed state, a rectangular plate-shaped roof panel 13 arranged substantially parallel to the bottom portion 4, and a rectangular plate-shaped side panel 14 bent downward from an end portion on the outer side in the vehicle width direction of the roof panel 13. When the wing 10 is in a closed state, the lower end portion of the side panel 14 abuts on or faces in close proximity to the upper end portion of the deflector plate 9, or is located outside and below the upper end portion of the deflector plate 9 in the vehicle width direction. Thereby, the internal space of the loading platform 3 is closed. However, in a state where the wing 10 is closed, the lower end portion of the side panel 14 can also be located above the upper end portion of the deflector plate 9.

[0031] The end portion on the vehicle width direction center side of the roof panel 13 constituting each wing 10 is connected to the end portion on the outer side in the vehicle width direction of the upper center frame 7 so as to be capable of swinging about a swing axis extending in the front-rear direction. By swinging and displacing each wing 10 in the vertical direction about the swing axis, the opening and closing of the wing 10 can be performed.

[0032] The wing opening / closing device 1 is installed between the front end portion and / or the rear end portion of the roof panel 13 constituting each wing 10 and the fixed frame of the loading platform 3.

[0033] In this example, the wing opening / closing device 1 is installed one by one between the front end portion of the roof panel 13 and the front panel 5 which is the fixed frame, and between the rear end portion of the roof panel 13 and the rear frame 6 which is the fixed frame, for each wing 10. That is, in this example, two wing opening / closing devices 1 are installed for each wing 10, and a total of four are installed.

[0034] In the case of a small wing vehicle or the like where each wing is configured to be relatively lightweight, two wing opening / closing devices 1 can be installed, one for each wing, for a total of two.

[0035] Also, in this example, the loading platform 3 is provided with a pair of wings 10 and both sides in the vehicle width direction can be opened and closed. However, the wing opening / closing device of the present disclosure can also be incorporated into a wing vehicle having a loading platform configured such that only one side in the vehicle width direction of the loading platform can be opened and closed, that is, a wing vehicle having only one wing.

[0036] In this example, based on the two wing opening / closing devices 1 for each wing 10 expanding and contracting in synchronization with each other, the wing 10 swings about the swing axis with respect to the fixed frame of the loading platform 3, thereby opening and closing the wing 10.

[0037] That is, the wing opening / closing device 1 installed on the front end side of each wing 10 is connected such that the base end portion (frame side swing support portion 22) in the expansion / contraction direction can swing about an axis oriented in the front-rear direction with respect to the upper end portion of the front panel 5, and the tip end portion (wing side swing support portion 31) in the expansion / contraction direction can swing about an axis oriented in the front-rear direction with respect to the front end portion of the roof panel 13. Also, the wing opening / closing device 1 installed on the rear end side of each wing 10 is connected such that the base end portion (frame side swing support portion 22) in the expansion / contraction direction can swing about an axis oriented in the front-rear direction with respect to the upper end portion of the rear frame 6, and the tip end portion (wing side swing support portion 31) in the expansion / contraction direction can swing about an axis oriented in the front-rear direction with respect to the rear end portion of the roof panel 13. Therefore, when each wing opening / closing device 1 extends, the wing 10 swings in the opening direction, and when each wing opening / closing device 1 contracts, the wing 10 swings in the closing direction.

[0038] In addition, each wing opening / closing device 1 also swings as the wing 10 swings. Specifically, as the wing 10 swings in the opening direction, each wing opening / closing device 1 swings in a direction in which the inclination angle of its central axis with respect to the horizontal direction increases, and as the wing 10 swings in the closing direction, each wing opening / closing device 1 swings in a direction in which the inclination angle of its central axis with respect to the horizontal direction decreases.

[0039] Hereinafter, the specific structure of each wing opening / closing device 1 will be described.

[0040] The wing opening / closing device 1 includes a frame side member 15, a wing side member 16, a screw mechanism 17, and an electric actuator 20 including an electric motor 18 and a speed reduction mechanism 19.

[0041] Regarding the wing opening / closing device 1, unless otherwise specified, the axial direction, circumferential direction, and radial direction refer to the axial direction, circumferential direction, and radial direction of the screw shaft 39 and nut 40 constituting the screw mechanism 17. The axial direction, circumferential direction, and radial direction of the screw shaft 39 and nut 40 coincide with the axial direction, circumferential direction, and radial direction of the cylinder portion 23 of the frame side member 15, and also coincide with the axial direction, circumferential direction, and radial direction of the piston portion 32 of the wing side member 16. In this example, with respect to the axial direction, one side refers to the right side in FIGS. 2 and 3, and the other side with respect to the axial direction refers to the left side in FIGS. 2 and 3.

[0042] The frame side member 15 has a frame side swing support portion 22 that is swingably supported (connected) with respect to the fixed frame of the loading platform 3.

[0043] In this example, the frame side member 15 has, in addition to the frame side swing support portion 22, a cylinder portion 23 and a base portion 24.

[0044] The cylinder part 23 serves as a housing part for the screw mechanism 17. The cylinder part 23 includes a cylindrical cylinder large-diameter cylinder part 25 that constitutes most of it, a hollow circular plate-shaped cylinder stepped plate part 26 that bends radially inward from one end of the cylinder large-diameter cylinder part 25 in the axial direction, and a cylindrical cylinder small-diameter cylinder part 27 that extends from the radially inner end of the cylinder stepped plate part 26 toward one side in the axial direction.

[0045] The base part 24 serves as a housing part for the speed reduction mechanism 19 and is connected to the other end of the cylinder part 23 in the axial direction. The base part 24 has a cylinder connection part 28 (the lower part in FIGS. 2 and 3) arranged at a position axially overlapping with the cylinder part 23, and an overhanging part 29 (the upper part in FIGS. 2 and 3) that protrudes radially outside the cylinder part 23 with respect to the cylinder connection part 28.

[0046] The frame-side swing support part 22 is provided so as to protrude toward the other side in the axial direction from the side surface of the cylinder connection part 28 of the base part 24 on the other side in the axial direction. The frame-side swing support part 22 is constituted by a substantially rectangular flat plate-shaped bracket and has a frame-side insertion hole 30 at its tip. The frame-side swing support part 22 is swingably connected to the fixed frame by inserting an axially oriented shaft-like member such as a bolt supported by the fixed frame of the loading platform 3 (the upper end of the front panel 5 or the upper end of the rear frame 6) into the frame-side insertion hole 30.

[0047] The wing-side member 16 has a wing-side swing support part 31 that is swingably supported (connected) to the wing 10.

[0048] Further, the wing-side member 16 has a screw-side element 52 coupled to a linear screw element (in this example, a nut 40), a reverse screw-side element 53 that includes the wing-side swing support part 31 and is combined to enable relative rotation with respect to the screw-side element 52, and a lock mechanism 21.

[0049] The screw-side element 52 has a recess 64 at at least one location in the circumferential direction (see FIGS. 4(a) and 4(b)).

[0050] In this example, the screw-side element 52 is constituted by a piston part 32 coaxially fitted in the cylinder part 23.

[0051] The screw-side element 52 (piston part 32) has a cylindrical piston large-diameter cylinder part 33, a hollow circular plate-shaped piston stepped plate part 34 bent radially inward from one end in the axial direction of the piston large-diameter cylinder part 33, a cylindrical piston small-diameter cylinder part 35 extending axially from the radially inner end of the piston stepped plate part 34, a piston bottom part 36 closing the opening at one end in the axial direction of the piston small-diameter cylinder part 35, and a cylindrical inner shaft 58 protruding axially from the central part of the piston bottom part 36.

[0052] The piston large-diameter cylinder part 33 is the part to which the nut 40 is coupled and is arranged inside the cylinder large-diameter cylinder part 25. The outer diameter of the piston large-diameter cylinder part 33 is larger than the inner diameter of the cylinder small-diameter cylinder part 27 and slightly smaller than the inner diameter of the cylinder large-diameter cylinder part 25.

[0053] The piston small-diameter cylinder part 35 is inserted through the cylinder small-diameter cylinder part 27. A cylindrical bush 37 is fitted and fixed inside the cylinder small-diameter cylinder part 27. The bush 37 has functions as a sliding bearing and a sealing member, and its inner peripheral surface is in sliding contact with the outer peripheral surface of the piston small-diameter cylinder part 35.

[0054] In this example, the recess 64 is provided at one circumferential position on the outer peripheral surface of the inner shaft 58.

[0055] In this example, the reverse-screw-side element 53 has an outer cylinder 59 having a cylindrical inner peripheral surface and a regular square cylinder-shaped outer peripheral surface, an outer cylinder bottom part 60 closing the opening at one end in the axial direction of the outer cylinder 59, and a wing-side swing support part 31 provided so as to protrude axially from one side surface in the axial direction of the outer cylinder bottom part 60.

[0056] The outer cylinder 59 is externally fitted to the inner shaft 58 without radial play and allowing relative rotation. The end face on the other axial side of the outer cylinder 59 abuts against the end face on one axial side of the piston bottom 36. Thereby, the outer cylinder 59 is prevented from displacing axially to the other axial side with respect to the inner shaft 58.

[0057] In this example, the wing side member 16 further includes an oval-ring-shaped retaining ring 63. The retaining ring 63 is spanned between an inner diameter side locking groove 61 formed over the entire circumference on the outer peripheral surface of the end on the other axial side of the inner shaft 58 and an outer diameter side locking groove 62 formed over the entire circumference on the inner peripheral surface of the end on the other axial side of the outer cylinder 59. Thereby, the outer cylinder 59 is prevented from displacing axially to one axial side with respect to the inner shaft 58.

[0058] The wing side swing support portion 31 is constituted by a substantially rectangular flat plate-shaped bracket or a square columnar bracket having an outer peripheral surface continuous with the outer peripheral surface of the outer cylinder 59, and has a wing side insertion hole 38 at an intermediate portion in the axial direction. The wing side swing support portion 31 is swingably connected to the wing 10 by inserting an axially oriented shaft-like member such as a bolt supported at the front end portion or the rear end portion of the roof panel 13 constituting the wing 10 into the wing side insertion hole 38.

[0059] The lock mechanism 21 is configured to be able to mutually switch between a locked state that prevents the screw side element 52 from rotating with respect to the reverse screw side element 53 at least in the direction in which the wing 10 closes, that is, the direction in which the overall length of the wing opening and closing device 1 contracts, and an unlocked state that allows the screw side element 52 to rotate with respect to the reverse screw side element 53 at least in the direction in which the wing 10 closes.

[0060] In this example, the lock mechanism 21 is configured to be able to mutually switch between a locked state that prevents the screw side element 52 from rotating in both directions with respect to the reverse screw side element 53 and an unlocked state that allows the screw side element 52 to rotate in both directions with respect to the reverse screw side element 53.

[0061] The locking mechanism 21 has an engaging member 81 detachably spanned between the screw-side element 52 and the reverse-screw-side element 53. The locking mechanism 21 switches to the locked state by engaging the engaging member 81 with both the screw-side element 52 and the reverse-screw-side element 53, and switches to the unlocked state by disengaging the engaging member 81 from at least one of the screw-side element 52 and the reverse-screw-side element 53.

[0062] Specifically, in this example, the locking mechanism 21 has a locking cylinder 68 that is supported and fixed to the reverse-screw-side element 53 and in which the engaging member 81 is fitted inside.

[0063] The locking cylinder 68 is configured to be generally cylindrical as a whole, and has a cylinder hole 70 that opens to the tip surface on the radially inner side of the portion from the tip end portion (the upper end portion in FIGS. 4(a) and 4(b)) to the intermediate portion. The locking cylinder 68 has its tip end portion screwed into a mounting hole 71 provided so as to penetrate one circumferential location in the axial intermediate portion of the outer cylinder 59 of the reverse-screw-side element 53 in the radial direction, and is further attached to the outer cylinder 59 by tightening a lock nut 72 screwed onto the outer peripheral surface of the portion near its tip end. In this example, the locking cylinder 68 is attached to the lower end portion of the outer cylinder 59 in a state where the wing opening / closing device 1 is attached to the loading platform 3.

[0064] In this example, the engaging member 81 is composed of a locking piston 69 fitted inside the locking cylinder 68 and an engaging element 65 held at the tip end portion of the locking piston 69. However, when implementing the present disclosure, the engaging member can also be configured by a pin or the like.

[0065] The locking piston 69 is fitted in the tip end side portion of the cylinder hole 70. The locking piston 69 has a piston recess 73 that opens to the tip surface.

[0066] The engaging element 65 is held in the piston recess 73 by disposing a part thereof (the outer part of the engaging element 65 in the radial direction of the wing side member 16) inside the piston recess 73. In this example, the engaging element 65 is constituted by a steel ball and is disposed inside the piston recess 73 without rattling.

[0067] The locking mechanism 21 switches to the locked state by engaging a part of the engaging element 65 that protrudes from the piston recess 73 with the recess 64, and switches to the unlocked state by disengaging the engagement between the part of the engaging element 65 that protrudes from the piston recess 73 and the recess 64.

[0068] The locking mechanism 21 further includes a biasing spring 66 that applies an elastic force to the engaging member 81 (the engaging element 65 and the locking piston 69) in a direction to engage the engaging member 81 with both the screw side element 52 and the anti-screw side element 53, and a release mechanism 67 for releasing the application of the elastic force to the engaging member 81.

[0069] The biasing spring 66 is sandwiched in an elastically compressed state between the bottom surface (rear end surface) 74 of the cylinder hole 70 and the base end surface 75 of the locking piston 69. That is, based on the fact that the biasing spring 66 tends to elastically recover, an elastic force in a direction toward the outer peripheral surface of the inner shaft 58 is applied to the engaging member 81 via the locking piston 69.

[0070] The biasing spring 66 can be constituted by various springs, but in this example, it is constituted by a compression coil spring.

[0071] The release mechanism 67 is configured to include a push-pull cable 76.

[0072] The push-pull cable 76 includes an outer tube 77, an end sleeve 78, an inner wire 79, and an operating lever 80.

[0073] The outer tube 77 is composed of a flexible resin tube, and one end thereof is connected to the base end of the locking cylinder 68.

[0074] The end sleeve 78 is formed in a substantially cylindrical shape from a highly rigid material such as metal, and is coupled and fixed to the other end of the outer tube 77.

[0075] The inner wire 79 is composed of a flexible metal wire, and is inserted through the outer tube 77 and the end sleeve 78.

[0076] One end of the inner wire 79 protruding from one end of the outer tube 77 passes through the base end of the locking cylinder 68, and is inserted into the biasing spring 66 in the cylinder hole 70, and is connected to the locking piston 69.

[0077] The other end of the inner wire 79 protruding from the end sleeve 78 is connected to the operation lever 80.

[0078] The operator holds the end sleeve 78 with one hand and the operation lever 80 with the other hand, and by pulling the operation lever 80 with respect to the end sleeve 78, the application of the elastic force of the biasing spring 66 to the engaging member 81 can be released. That is, when the operation lever 80 is pulled with respect to the end sleeve 78, the inner wire 79 is displaced (slides) relative to the outer tube 77 and the end sleeve 78 in the pulling direction of the operation lever 80, and the locking piston 69 connected to one end of the inner wire 79 is pulled toward the bottom surface 74 side of the cylinder hole 70 against the elastic force of the biasing spring 66. Thereby, the application of the elastic force of the biasing spring 66 to the engaging member 81 is released.

[0079] When the application of the elastic force of the biasing spring 66 to the engagement member 81 is released, due to the action of gravity, the engagement member 81 (the engaging element 65 and the locking piston 69) moves downward, so that the engagement of the engaging element 65 with the recess 64 is disengaged, and the two-way rotation of the threaded element 52 with respect to the non-threaded element 53 is allowed, switching to the unlocked state.

[0080] On the other hand, when the operator releases the force of pulling the operation lever 80 with respect to the end sleeve 78 from the state where the application of the elastic force of the biasing spring 66 to the engagement member 81 is released, due to the elastic force of the biasing spring 66, the inner wire 79 is displaced (slides) relative to the outer tube 77 and the end sleeve 78 in the direction opposite to the pulling direction of the operation lever 80, and the locking piston 69 connected to one end of the inner wire 79 moves toward the opening side of the cylinder hole 70, so that the elastic force of the biasing spring 66 is applied to the engagement member 81 again. In this state, when the circumferential phases of the piston recess 73 and the recess 64 coincide, the engaging element 65 is bridged between the piston recess 73 and the recess 64, and the state switches to the locked state.

[0081] Note that the push-pull cable 76 is installed on the loading platform 3 at a location where it does not interfere with the loading and unloading operations of the luggage. The push-pull cable 76 is preferably installed in a place that is not easily noticeable from the viewpoint of preventing malfunction and mischief.

[0082] The screw mechanism 17 includes a screw shaft 39 and a nut 40 screwed onto the screw shaft 39. As the screw shaft 39 and the nut 40 rotate relative to each other, the screw shaft 39 and the nut 40 are displaced relative to each other in the axial direction.

[0083] In this example, the screw mechanism 17 further includes a plurality of balls 41, and the nut 40 is screwed onto the screw shaft 39 via the plurality of balls 41. That is, in this example, the screw mechanism 17 is constituted by a ball screw mechanism. However, when implementing the present disclosure, the screw mechanism can also be constituted by a sliding screw mechanism in which the nut is directly screwed onto the screw shaft.

[0084] In this example, the screw shaft 39 has a shaft-side ball screw groove 42 on the outer peripheral surface of the axial intermediate portion. The nut 40 has a nut-side ball screw groove 43 on the inner peripheral surface. The screw shaft 39 is inserted with its axial intermediate portion radially inside the nut 40 and is arranged coaxially with the nut 40. Between the outer peripheral surface of the screw shaft 39 and the inner peripheral surface of the nut 40, there is provided a spiral load path formed by the shaft-side ball screw groove 42 and the nut-side ball screw groove 43. A plurality of balls 41 are rotatably arranged in the load path. Thus, based on the relative rotation of the screw shaft 39 and the nut 40, the screw shaft 39 and the nut 40 can be relatively displaced in the axial direction.

[0085] Note that when the screw shaft 39 and the nut 40 are relatively rotated, the balls 41 that reach the end point of the load path are returned to the start point of the load path through a circulation path (not shown) provided in the nut 40.

[0086] In this example, the screw shaft 39 constitutes a rotary screw element that is supported by the frame side member 15 so as to be rotatable only, and the nut 40 constitutes a linear motion screw element that is coupled to the wing side member 16.

[0087] Specifically, the screw shaft 39 is arranged coaxially with the cylinder portion 23 and the piston portion 32 inside the cylinder portion 23, the piston portion 32, and the base portion 24. Of the screw shaft 39, the end portion on the other axial side where the shaft-side ball screw groove 42 is not formed is supported by a pair of rolling bearings 44 and 45 that are axially spaced apart from the base portion 24 so as to be rotatable only.

[0088] Furthermore, a cylindrical bush 46 is externally fitted and fixed to the end portion on one axial side of the screw shaft 39 where the shaft-side ball screw groove 42 is not formed. The bush 46 has functions as a stopper and an anti-disengagement when the nut 40 is displaced to the vicinity of the end portion on one axial side of the screw shaft 39, and its outer peripheral surface is in sliding contact with the inner peripheral surface of the piston small-diameter cylindrical portion 35.

[0089] The nut 40 is fitted and fixed inside the piston large-diameter cylinder portion 33 of the wing side member 16.

[0090] The electric actuator 20 rotationally drives a screw shaft 39 which is a rotary screw element. The electric actuator 20 has an electric motor 18 and a speed reduction mechanism 19, and the electric motor 18 rotationally drives the screw shaft 39 via the speed reduction mechanism 19.

[0091] In this example, the electric motor 18 is supported by the frame side member 15. Specifically, the electric motor 18 is disposed at a position adjacent in the radial direction to the other end in the axial direction of the cylinder portion 23, and is coupled and fixed to the overhanging portion 29 of the base portion 24. The output shaft 47 of the electric motor 18 is disposed parallel to the screw shaft 39 and the nut 40, and the tip thereof is inserted inside the cylinder connection portion 28 of the base portion 24.

[0092] The speed reduction mechanism 19 is disposed between the electric motor 18 and the screw shaft 39, increases the output torque of the electric motor 18, and then transmits it to the screw shaft 39.

[0093] That is, in the wing opening and closing device 1 of this example, the output torque of the electric motor 18 is transmitted to the screw shaft 39 via the speed reduction mechanism 19, thereby rotating the screw shaft 39. Thereby, based on the relative displacement of the nut 40 in the axial direction with respect to the screw shaft 39, the piston portion 32 of the wing side member 16 is relatively displaced in the axial direction with respect to the cylinder portion 23 of the frame side member 15, whereby the wing opening and closing device 1 expands and contracts in the axial direction.

[0094] In this example, the speed reduction mechanism 19 is constituted by a gear type speed reduction mechanism and is housed in the base portion 24 of the frame side member 15.

[0095] The speed reduction mechanism 19 includes a first gear 48, a second gear 49, a third gear 50, and a fourth gear 51. The first gear 48 is supported and fixed to the tip of the output shaft 47 of the electric motor 18. The second gear 49 and the third gear 50 are supported and fixed to an intermediate shaft that is supported inside the base portion 24 parallel to the screw shaft 39 and allows only rotation. The second gear 49 has a larger number of teeth than the first gear 48, and the teeth of the second gear 49 mesh with the teeth of the first gear 48. The third gear 50 has a smaller number of teeth than the second gear 49. The fourth gear 51 is supported and fixed to the other end of the screw shaft 39 in the axial direction. The fourth gear 51 has a larger number of teeth than the third gear 50, and the teeth of the fourth gear 51 mesh with the teeth of the third gear 50.

[0096] In the wing opening / closing device 1 of this example, the electric actuator 20 further includes an electromagnetic brake 82 assembled to the output shaft 47. The electromagnetic brake 82 is housed in the base portion 24.

[0097] When the electric motor 18 operates, the electromagnetic brake 82 is energized and switched to a non-locked state that allows the rotation of the output shaft 47 and the rotation of the speed reduction mechanism 19 (the rotation of the first gear 48, the second gear 49, the third gear 50, and the fourth gear 51). Thereby, torque can be transmitted from the electric motor 18 to the screw mechanism 17 via the speed reduction mechanism 19, that is, the wing opening / closing device 1 can be expanded and contracted in the axial direction to perform the opening / closing operation of the wing 10.

[0098] On the other hand, when the energization to the electromagnetic brake 82 is cut off when the electric motor 18 is not operating, it switches to a locked state where it blocks the rotation of the output shaft 47 and the rotation of the speed reduction mechanism 19. In the locked state, even when torque due to the self-weight of the wing 10 is reversely input from the side of the wing 10, the speed reduction mechanism 19 does not rotate. Therefore, according to the wing opening / closing device 1 of this example, the wing 10 can be held in the open state without operating the electric motor 18. When implementing the present disclosure, the electromagnetic brake 82 can also be assembled to the speed reduction mechanism 19. However, from the perspective of keeping the braking force for realizing the locked state small, it is preferable to assemble the electromagnetic brake 82 to the output shaft 47 as in this example.

[0099] When implementing the present disclosure, as the speed reduction mechanism, not limited to a gear type speed reduction mechanism, a belt type or a chain type speed reduction mechanism can also be adopted. Also, when implementing the present disclosure, if various speed reduction mechanisms such as a worm speed reduction mechanism having a self-locking function are used as the speed reduction mechanism, the torque reversely input from the side of the wing can be blocked by the speed reduction mechanism having the self-locking function. Therefore, the wing can be held in the open state without using an electromagnetic brake.

[0100] According to the wing opening / closing device 1 of this example, even when the electric actuator 20 becomes inoperable due to a failure, power loss, control defect, etc. in the state where the wing 10 is open, and as a result, the screw shaft 39 cannot be rotated, the wing opening / closing device 1 can be contracted to close the wing 10.

[0101] That is, even when the screw shaft 39 cannot be rotated, by operating the release mechanism 67 to switch the lock mechanism 21 from the locked state to the unlocked state, the rotation of the screw-side element 52 (piston portion 32) with respect to the non-screw-side element 53 in the direction of closing the wing 10 is allowed, so that the combined body of the screw-side element 52 (piston portion 32) and the nut 40 can be allowed to rotate with respect to the screw shaft 39 while being displaced relatively in the axial direction. Thereby, by relatively displacing the combined body of the screw-side element 52 (piston portion 32) and the nut 40 to the other side in the axial direction with respect to the screw shaft 39, the wing opening / closing device 1 can be contracted to close the wing 10.

[0102] More specifically, when the wing 10 is in the open state and the screw shaft 39 cannot be rotated due to a failure, power loss, control defect, etc. in only one of the two wing opening / closing devices 1 arranged in front of and behind the wing 10, the lock mechanism 21 of the one wing opening / closing device 1 is switched from the locked state to the unlocked state. In this state, by causing the other wing opening / closing device 1 of the two wing opening / closing devices 1 to perform a contraction operation, the wing 10 can be closed while the one wing opening / closing device 1 is being driven to contract.

[0103] Also, when the wing 10 is in the open state and the screw shaft 39 cannot be rotated due to a failure, power loss, control defect, etc. in each of the two wing opening / closing devices 1, for each wing opening / closing device 1, by operating the release mechanism 67 to alternately or simultaneously switch the lock state and the unlocked state of the lock mechanism 21 in small increments, the operation of the wing 10 to close by its own weight can be performed step by step.

[0104] That is, with the wing 10 in the open state, the self-weight of the wing 10 acts on the wing opening / closing device 1 as a load in the contraction direction. In this state, when the operator pulls the operation lever 80 with respect to the end sleeve 78 to disengage the engaging element 65 from the recess 64 and switches the lock mechanism 21 from the locked state to the unlocked state, due to the load in the contraction direction, the combined body of the screw-side element 52 (piston portion 32) and the nut 40 rotates with respect to the screw shaft 39 and the reverse-screw-side element 53 in the direction in which the wing opening / closing device 1 contracts, that is, in the direction in which the combined body is displaced to the other side in the axial direction.

[0105] After that, when the operator releases the force of pulling the operation lever 80 with respect to the end sleeve 78 and the elastic force of the biasing spring 66 is applied to the engaging element 65, the engaging element 65 engages with the recess 64 at the timing when the circumferential phases of the piston recess 73 and the recess 64 coincide. As a result, when the lock mechanism 21 switches from the unlocked state to the locked state, the rotation of the combined body of the screw-side element 52 (piston portion 32) and the nut 40 with respect to the screw shaft 39 and the reverse-screw-side element 53 in the direction in which the wing opening / closing device 1 contracts, that is, in the direction in which the combined body is displaced to the other side in the axial direction, is prevented.

[0106] In this example, since the recess 64 is provided only at one location in the circumferential direction on the outer peripheral surface of the inner shaft 58 that constitutes the screw-side element 52 (piston portion 32), by finely performing the operation of the operator pulling the operation lever 80, the rotation of the combined body of the screw-side element 52 (piston portion 32) and the nut 40 can be stopped for each one rotation or multiple rotations.

[0107] Therefore, for each wing opening / closing device 1, by finely performing the operation of the operator pulling the operation lever 80 alternately or simultaneously and finely switching the lock state and the unlocked state of the lock mechanism 21, the operation of the wing 10 closing due to its own weight can be performed step by step.

[0108] As described above, in the wing opening / closing device 1 of this example, since the rotation of the combined body of the screw-side element 52 (piston portion 32) and the nut 40 can be stopped every one rotation or a plurality of rotations, it is possible to effectively prevent the open wing 10 from closing all at once due to its own weight.

[0109] In the wing opening / closing device 1 of this example, since the release mechanism 67 is configured to include the push-pull cable 76, the operator can avoid performing the release operation of the lock mechanism 21 at a high position which is the upper part of the loading platform 3 where the lock mechanism 21 is arranged, and can perform it at a low position.

[0110] [Second Example] A second example of the embodiment of the present disclosure will be described with reference to FIGS. 5 and 6.

[0111] In the wing opening / closing device 1a of this example, by rotationally driving the nut 40a by the electric actuator 20a, based on the relative displacement of the screw shaft 39a in the axial direction with respect to the nut 40a, a configuration is adopted in which the wing opening / closing device 1a expands and contracts in the axial direction. That is, in this example, the nut 40a constitutes a rotating screw element, and the screw shaft 39a constitutes a linear motion screw element.

[0112] In this example, the cylinder portion 23a constituting the frame side member 15a has a substantially cylindrical cylinder large-diameter cylinder portion 25a located at one end in the axial direction, a substantially hollow circular plate-shaped cylinder step portion 26a bent radially inward from the other end in the axial direction of the cylinder large-diameter cylinder portion 25a, a cylindrical cylinder small-diameter cylinder portion 27a extending from the inner end in the radial direction of the cylinder step portion 26a toward the other end in the axial direction, and a cylinder bottom portion 54 closing the opening at the other end in the axial direction of the cylinder small-diameter cylinder portion 27a.

[0113] In this example, the cylinder connection portion 28 of the base portion 24a constituting the frame side member 15a is connected to one end in the axial direction of the cylinder portion 23a.

[0114] In this example, the frame side swing support portion 22 that constitutes the frame side member 15a is provided so as to protrude axially on the other side from the side surface on the other side in the axial direction of the cylinder bottom portion 54.

[0115] In this example, the nut 40a that constitutes the screw mechanism 17a is supported inside the large-diameter cylinder portion 25a of the cylinder by a pair of rolling bearings 55 arranged axially apart so as to allow only rotation.

[0116] In this example, one end portion on the axial direction side of the screw shaft 39a that constitutes the screw mechanism 17a protrudes outside the base portion 24a through a through hole 56 provided in the cylinder connection portion 28 of the base portion 24a.

[0117] In this example, the screw side element 52a that constitutes the wing side member 16a consists only of the inner shaft 58. The inner shaft 58 is integrally formed with the screw shaft 39a, and specifically, it is provided so as to protrude axially on the axial direction side from the central portion of the end surface on the axial direction side of the screw shaft 39a.

[0118] In this example, the electric motor 18 is arranged at a position adjacent to the end portion on the axial direction side of the cylinder portion 23a in the radial direction, and is fixedly coupled to the overhanging portion 29 of the base portion 24a.

[0119] In this example, the fourth gear 51a that constitutes the speed reduction mechanism 19a is fixed coaxially with the nut 40a to the end surface on the axial direction side of the nut 40a, and has a central hole 57 through which the screw shaft 39a is inserted at the central portion in the radial direction.

[0120] In the wing opening and closing device 1a of this example, even when the nut 40a cannot be rotated due to a failure of the electric actuator 20a or the like, by operating the release mechanism 67 to switch the lock mechanism 21 from the locked state to the unlocked state, the screw side element 52a (inner shaft 58) is allowed to relatively rotate in both directions with respect to the anti-screw side element 53, so that the combined body of the screw side element 52a (inner shaft 58) and the screw shaft 39a can be allowed to relatively displace axially while rotating with respect to the nut 40a.

[0121] The other configurations and effects for the second example are the same as those for the first example.

[0122] In addition, when implementing the present disclosure, a configuration in which the screw shaft (rotating screw element) is supported by the wing side member so as to be rotatable only, and the nut (linear motion screw element) is coupled to the frame side member, or a configuration in which the nut (rotating screw element) is supported by the wing side member so as to be rotatable only, and the screw shaft (linear motion screw element) is coupled to the frame side member can also be adopted. Further, the linear motion screw element and the wing side member or the frame side member can be integrally configured.

[0123] In addition, when implementing the present disclosure, a ratchet mechanism can also be adopted as the locking mechanism provided between the screw side element and the reverse screw side element.

[0124] The ratchet mechanism includes a gear that is coaxially fixed or integrally formed with one of the two elements provided to enable relative rotation and has teeth at at least one location in the circumferential direction of the outer peripheral surface, a claw member (engagement member) that is swingably supported with respect to the other of the two elements and is provided to enable engagement and disengagement with the teeth of the gear, and a biasing spring that applies an elastic force for swinging the claw member in a direction in which the claw of the claw member meshes with the teeth of the gear to the claw member.

[0125] The ratchet mechanism is in a locked state when the claw of the claw member meshes with the tooth of the gear (the claw member engages with both the one element and the other element via the gear) due to the elastic force of the biasing spring. In the locked state, when the one element attempts to rotate in the forward rotation direction with respect to the other element, the engagement between the tooth of the gear and the claw of the claw member prevents the one element from rotating in the forward rotation direction with respect to the other element. On the other hand, when the one element attempts to rotate in the reverse rotation direction with respect to the other element, the claw member swings against the elastic force of the biasing spring in a direction in which the claw of the claw member rides over the tooth of the gear, disengaging the engagement between the claw of the claw member and the tooth of the gear, thereby allowing the one element to rotate in the reverse rotation direction with respect to the other element.

[0126] When a ratchet mechanism is employed as the locking mechanism, the ratchet mechanism is assembled so that in the locked state, the screw-side element and the non-screw-side element can be prevented from rotating relative to each other in the direction in which the wings close. That is, in a normal use state where there is no failure in the electric actuator or the like, the ratchet mechanism is assembled so that the screw-side element and the non-screw-side element can be prevented from rotating relative to each other in the direction in which the wings close when the wings are open.

[0127] Further, when a ratchet mechanism is employed as the locking mechanism, a release mechanism (for example, a release mechanism including a push-pull cable) for swinging the claw member against the elastic force of the biasing spring in a direction in which the engagement between the claw of the claw member and the tooth of the gear is disengaged is provided.

[0128] The ratchet mechanism becomes unlocked when the engagement between the claw of the claw member and the tooth of the gear is disengaged by swinging the claw member by the release mechanism. In the unlocked state, the ratchet mechanism allows the one element to rotate in both directions with respect to the other element.

[0129] When the wings are open and the rotary screw element cannot be rotated due to a failure of the electric actuator or the like, the release mechanism switches the ratchet mechanism from the locked state to the unlocked state, allowing the screw-side element and the non-screw-side element to relatively rotate in the direction in which the wings close, so that the wings can be closed. Also in this case, by operating the release mechanism to finely switch between the locked state and the unlocked state of the ratchet mechanism, the wings can be made to close step by step under their own weight.

[0130] When a ratchet mechanism is adopted as the locking mechanism, in a normal use state where there is no failure in the electric actuator or the like, when opening the wings, the relative rotation of the screw-side element and the non-screw-side element, that is, the integral rotation of the rotary screw element and the linear screw element constituting the screw mechanism, cannot be blocked by the locked state of the ratchet mechanism. The reason for this is that the relative rotation of the screw-side element and the non-screw-side element at this time is a relative rotation in a direction allowed in the locked state of the ratchet mechanism.

[0131] Therefore, when a ratchet mechanism is adopted as the locking mechanism, in a normal use state where there is no failure in the electric actuator or the like, in order to prevent the relative rotation of the screw-side element and the non-screw-side element, that is, the integral rotation of the rotary screw element and the linear screw element constituting the screw mechanism when opening the wings, a rotation prevention member such as a pin is detachably spanned between the screw-side element and the non-screw-side element to prevent relative rotation in both directions of the screw-side element and the non-screw-side element. Then, when the wings are open and the rotary screw element cannot be rotated due to a failure of the electric actuator or the like, by removing the rotation prevention member, the relative rotation of the screw-side element and the non-screw-side element in the direction in which the wings close is allowed.

[0132] When implementing the wing opening / closing device of the present disclosure, as in the first and second examples of the embodiments, a structure that can prevent relative rotation in both directions between the screw-side element and the reverse-screw-side element in the locked state of the locking mechanism can be provided with a rotation prevention member such as a pin detachably bridged between the screw-side element and the reverse-screw-side element in the normal use state.

Explanation of Signs

[0133] 1, 1a Wing opening / closing device 2 Wing vehicle 3 Loading platform 4 Bottom 5 Front panel 6 Rear frame 7 Upper central frame 8 Rear door 9 Baffle plate 10 Wing 11 Chassis 12 Cabin 13 Roof panel 14 Side panel 15, 15a Frame side member 16, 16a Wing side member 17, 17a Screw mechanism 18 Electric motor 19, 19a Reduction mechanism 20, 20a Electric actuator 21 Locking mechanism 22 Frame side swing support part 23, 23a Cylinder part 24, 24a Base part 25, 25a Cylinder large diameter cylinder part 26, 26a Cylinder step plate part 27, 27a Cylinder small diameter cylinder part 28 Cylinder connection part 29 Protruding part 30 Frame side insertion hole 31 Wing side swing support part 32 Piston part 33 Piston large diameter cylinder part 34 Piston step plate part 35 Piston small diameter cylinder part 36 piston bottom 37 bush 38 wing side insertion hole 39, 39a screw shaft 40, 40a nut 41 ball 42 shaft side ball screw groove 43 nut side ball screw groove 44 rolling bearing 45 rolling bearing 46 bush 47 output shaft 48 first gear 49 second gear 50 third gear 51, 51a fourth gear 52, 52a screw side element 53 reverse screw side element 54 cylinder bottom 55 rolling bearing 56 through hole 57 center hole 58 inner shaft 59 outer cylinder 60 outer cylinder bottom 61 inner diameter side locking groove 62 outer diameter side locking groove 63 retaining ring 64 recess 65 engaging element 66 biasing spring 67 release mechanism 68 locking cylinder 69 locking piston 70 cylinder hole 71 mounting hole 72 lock nut 73 piston recess 74 bottom surface 75 base end surface 76 push-pull cable 77 outer tube 78 end sleeve 79 inner wire 80 operating lever 81 engaging member 82 electromagnetic brake

Claims

1. A wing opening / closing device used for performing the opening / closing operation of a wing that is swingably supported with respect to a fixed frame on a loading platform of a wing vehicle, comprising: A frame-side member having a frame-side swing support portion swingably supported with respect to the fixed frame; A wing-side member having a wing-side swing support portion swingably supported with respect to the wing; A screw mechanism including a screw shaft and a nut screwed directly or via a ball to the screw shaft, wherein one of the screw shaft and the nut, which is a rotating screw element, is supported by one of the frame-side member and the wing-side member so as to be rotatable only, and the other of the screw shaft and the nut, which is a linear motion screw element, is coupled to the other of the frame-side member and the wing-side member or is integrally formed with the other member; An electric actuator for rotationally driving the rotating screw element; and the other member includes a screw-side element coupled to the linear motion screw element or integrally formed with the linear motion screw element, an anti-screw-side element including the wing-side swing support portion or the frame-side swing support portion and combined to enable relative rotation with respect to the screw-side element, and a lock mechanism capable of mutually switching between a locked state in which the rotation of the screw-side element with respect to the anti-screw-side element in at least the direction in which the wing closes is blocked and a non-locked state in which the rotation of the screw-side element with respect to the anti-screw-side element in at least the direction in which the wing closes is allowed. The wing opening / closing device having the above.

2. The locking mechanism has an engaging member detachably spanned between the screw-side element and the reverse-screw-side element, and switches to the locked state by engaging the engaging member with both the screw-side element and the reverse-screw-side element, and switches to the unlocked state by disengaging the engaging member from at least one of the screw-side element and the reverse-screw-side element. The wing opening / closing device according to claim 1.

3. The screw-side element has recesses at at least one location in the circumferential direction. The locking mechanism is supported and fixed to the reverse-screw-side element and has a locking cylinder with the engaging member fitted therein. By engaging the tip of the engaging member with the recess, it switches to the locked state, and by disengaging the engagement between the tip of the engaging member and the recess, it switches to the unlocked state. The wing opening / closing device according to claim 2.

4. The engaging member has a locking piston fitted inside the locking cylinder and an engaging element held at the tip of the locking piston. The wing opening / closing device according to claim 3.

5. The locking mechanism has a biasing spring that applies an elastic force in a direction to engage the engaging member with both the screw-side element and the reverse-screw-side element to the engaging member, and a release mechanism for releasing the application of the elastic force to the engaging member. The wing opening / closing device according to any one of claims 2 to 4.

6. The release mechanism includes a push-pull cable. The wing opening / closing device according to claim 5.

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