Wing opening and closing device for a wing vehicle

Abstract

To provide a wing opening / closing device for a wing vehicle that is able to close a wing in an emergency in which the wing cannot be closed.SOLUTION: A wing opening / closing device for a wing vehicle includes: a male screw shaft 12 supported by a speed reducer 15 so as to freely rotate; a female screw body 13 that is threadedly engaged with the male screw shaft 12 and linearly moves in accordance with rotation of the male screw shaft 12; a moving cylinder 14 connected to the female screw body 13; a motor 16 that rotationally drives the male screw shaft 12 via the speed reducer 15; and a base 17 holding the speed reducer 15 and the motor 16; wherein the base 17 and the moving cylinder 14 are respectively supported on a body 3 and a wing 5 of the wing vehicle, is characterized in that a connecting body 30 is fixed to the female screw body 13, a bearing hole 32 is formed in the connecting body 30, a connecting shaft 34 fixed to the moving cylinder 14 is fitted into the bearing hole 32 so as to freely rotate, and a U-shaped pin 39 is removably interposed between the connecting body 30 and the connecting shaft 34.SELECTED DRAWING: Figure 2

Description

Technical Field

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

Background Art

[0002] Generally, in order to facilitate the loading and unloading work of loads on a truck, a wing truck equipped with a wing opening / closing device for opening and closing a left wing and a right wing that are respectively supported on a wing body so as to be openable and closable is known.

[0003] As a conventional wing opening / closing device of this type, there is one including a male screw shaft rotatably supported in a cylinder, a female screw body screwed onto the male screw shaft and linearly moving as the male screw shaft rotates, a piston fixed to the female screw body, a motor that rotationally drives the male screw shaft via a speed reducer, and a base that holds the speed reducer and the motor, wherein the base is pivotally mounted on the body of the wing truck, and the piston is pivotally mounted on the wing of the wing truck (see, for example, Patent Document 1). Also, there is a wing opening / closing device for a wing truck including a male screw shaft disposed in a cylinder, a female screw body disposed at one end in the cylinder and screwed onto the male screw shaft, and a sleeve-shaped rotor connected to the female screw body and rotated by a motor to linearly move the male screw shaft, wherein the cylinder and the male screw shaft are pivotally mounted on the wing body and the wing of the wing truck, respectively (see Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Disclosure of the Invention

Problems to be Solved by the Invention

[0005] In a wing opening / closing device using an electric cylinder device, when one or both of the motor and the speed reducer fail for some reason (hereinafter sometimes referred to as an emergency), there is a problem that the wing cannot be closed by a so-called feed screw mechanism of a male screw shaft and a female screw body. The wing vehicle cannot be driven with the wing open.

[0006] An object of the present invention is to provide a wing opening / closing device for a wing vehicle that can close the wing by utilizing the load of the wing in an emergency.

Means for Solving the Problems

[0007] Typical means for solving the above problems are as follows. A wing opening / closing device for a wing vehicle, comprising a male screw shaft rotatably supported, a female screw body screwed onto the male screw shaft and linearly moving with the rotation of the male screw shaft, a moving cylinder moving together with the female screw body, and a motor for rotationally driving the male screw shaft, wherein a bearing hole is formed in a connecting body that moves together with the female screw body, a connecting shaft that moves together with the moving cylinder is rotatably fitted into the bearing hole, and a rotation preventing member is detachably interposed between the connecting body and the connecting shaft. A wing opening / closing device for a wing vehicle, characterized by the above.

Effects of the Invention

[0008] According to the above means, in a wing opening / closing device for a wing vehicle using an electric cylinder device, the wing can be closed by utilizing the load of the wing in an emergency.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] FIGS. 1 to 5 show the first embodiment of the present invention. In the present embodiment, the wing opening / closing device of the wing vehicle according to the present invention is configured to open and close the wing of the wing vehicle shown in FIG. 1.

[0012] As shown in FIG. 1, the wing vehicle 1 includes a wing body (hereinafter referred to as the body) 3 mounted on the loading platform of the truck 2. A pair of wings 5 are rotatably supported by support shafts 4 on the left and right side walls of the body 3, and are installed to open and close obliquely upward in a gull-wing form. Since the left and right wings 5, 5 have the same structure and are arranged symmetrically, hereinafter, the left wing 5 will be typically described. A pair of front and rear electric cylinder devices 10, 10 are respectively arranged on the front and rear walls of the body 3. One end of both electric cylinder devices 10, 10 is rotatably pivoted to the body 3, and the other end is rotatably pivoted to the wing 5. That is, the wing 5 is opened and closed by the telescopic operation of a pair of front and rear electric cylinder devices 10, 10.

[0013] As shown in FIG. 2, the electric cylinder device 10 includes a male screw shaft 12 rotatably supported by a speed reducer 15, a female screw body 13 ball screw-coupled to the male screw shaft 12 and linearly moving along with the rotation of the male screw shaft 12, a moving cylinder 14 moving following the female screw body 13, and a motor 16 rotationally driving the male screw shaft 12 via the speed reducer 15. The speed reducer 15 and the motor 16 are installed and fixed on a base 17. A body-side attachment portion 18 projects from an end face of the base 17 opposite to the speed reducer 15 and the motor 16. The electric cylinder device 10 is horizontally arranged near the ceiling of the body 3, and the body-side attachment portion 18 is rotatably mounted on the body 3 by a bracket 19. The moving cylinder 14 is rotatably mounted on the wing 5 via a turnbuckle 20.

[0014] Bolts 21 are arranged on the same axis at the tip of the moving cylinder 14. The heads of the bolts 21 are fixed inside the moving cylinder 14, and the male screw portions protrude forward. A square column-shaped turnbuckle body 22 is rotatably and axially movably fitted to the male screw portion of the bolt 21. Tur A tool engagement portion 23 capable of engaging a tool (not shown) such as a wrench is formed on the outer periphery of the turnbuckle body 22. The turnbuckle 20 can adjust the distance to the moving cylinder 14 by engaging a tool with the tool engagement portion 23 and rotating the turnbuckle body 22. By this distance adjustment operation, the overall length of the wing opening and closing device 10 can be adjusted. An attachment hole 24 is opened in the turnbuckle 20 perpendicular to the axis, and a pivot 25 is rotatably fitted into the attachment hole 24. The pivot 25 is rotatably mounted by a bracket 26 fixed to the wing 5.

[0015] As shown in FIGS. 2 and 3, a connecting body 30 is disposed on the same axis of the holder 13A of the female screw body 13 and fixed by a bolt 31. A bearing hole 32 having a cylindrical hole shape is formed on the same axis of the connecting body 30. A thrust bearing 33 is disposed on the bottom surface of the bearing hole 32. A cylindrical connecting shaft 34 is disposed on the same axis at the end of the moving cylinder 14 opposite to the turnbuckle 20 and fixed by a screw coupling portion 35. The end face of the connecting shaft 34 is in sliding contact with the thrust bearing 33 disposed on the bottom surface of the bearing hole 32. The connecting shaft 34 is prevented from coming off the connecting body 30 by a stopper ring 36 attached to the inner periphery of the opening of the bearing hole 32.

[0016] A pair of connecting shaft side insertion holes 37, 37 are formed in the connecting shaft 34 symmetrically with respect to the axis in a plane perpendicular to the axis. A pair of connecting body side insertion holes 38, 38 are formed at positions facing the connecting shaft side insertion holes 37, 37 of the connecting body 30 so as to form a straight line with the connecting shaft side insertion holes 37, 37. A U-shaped pin 39 as an anti-rotation member is slidably fitted into the connecting shaft side insertion holes 37, 37 and the connecting body side insertion holes 38, 38. A positioning ring 40 is fixed to the curved side portion of the U-shaped pin 39, and the positioning ring 40 abuts against the side surface of the connecting body 30 to position the U-shaped pin 39. A stopper ring 41 is attached to one tip of the U-shaped pin 39 via a washer 42, and the stopper ring 41 prevents the U-shaped pin 39 from coming out of the insertion holes 37, 38.

[0017] Next, the operation will be described.

[0018] The electric cylinder device 10 is horizontally disposed near the ceiling of the body 3, the body side mounting portion 18 is rotatably supported on the body 3 by a bracket 19, and the turnbuckle 20 is rotatably supported on the wing 5 by a bracket 26. At this time, the operator manually rotates the turnbuckle 20 through the tool engagement part 23 to adjust the distance between the turnbuckle 20 and the moving cylinder 14, that is, the overall length of the wing opening and closing device 10, so as to bring the wing 5 into close contact with the body 3.

[0019] When the wing 5 is in the closed state in close contact with the body 3, as shown in FIG. 2, the tip of the male screw shaft 12 of the wing opening and closing device 10 is located at the tip inside the moving cylinder 14. To open the wing 5, when the motor 16 rotates forward, the male screw shaft 12 is rotated at a reduced speed through the speed reducer 15. At this time, since the female screw body 13 is prevented from rotating by the wing 5 through the connecting body 30, the connecting shaft 34, the moving cylinder 14, the turnbuckle 20 and the bracket 26, the female screw body 13 moves on the male screw shaft 12 following the rotation of the male screw shaft 12. As the moving cylinder 14 connected to the female screw body 13 is pushed by the movement of the female screw body 13, the wing opening and closing device 10 opens the wing 5. When the female screw body 13 reaches the limit, the motor 16 is automatically stopped. When the wing opening and closing device 10 shown in FIG. 4 is extended, a load of the wing 5 is applied to the female screw body 13, but since the female screw body 13 is prevented from rotating by the wing 5 and cannot rotate, the wing opening and closing device 10 maintains the opening of the wing 5.

[0020] To close the wing 5, when the motor 16 rotates reversely, the male screw shaft 12 is rotated at a reduced speed in the direction opposite to that during the wing opening operation through the speed reducer 15. At this time, since the female screw body 13 is prevented from rotating by the wing 5 through the connecting body 30, the connecting shaft 34, the moving cylinder 14, the turnbuckle 20 and the bracket 26, the female screw body 13 moves on the male screw shaft 12 following the rotation of the male screw shaft 12. As the moving cylinder 14 connected to the female screw body 13 is pulled back by the movement of the female screw body 13, the wing opening and closing device 10 closes the wing 5. When the female screw body 13 reaches the limit, the motor 16 is automatically stopped.

[0021] When the motor 16 for closing the wing 5 is started and the male screw shaft 12 does not rotate, the wing 5 will not close. In this case, after performing a pre-treatment (for example, hanging a rope on the wing 5) to cope with an unexpected closing operation of the wing 5 (for example, a sudden drop of the wing 5), the U-shaped pin 39 of the emergency wing opening / closing device 10 is extracted from the connecting body 30. Subsequently, if the other wing opening / closing device 10 is normal, the motor 16 of that wing opening / closing device 10 is rotated in the reverse direction. As shown in FIG. 5, when the U-shaped pin 39 is extracted from the connecting body 30, the engagement between the connecting body 30 and the connecting shaft 34 is released, so that the female screw body 13 becomes rotatable, and the female screw body 13 to which the load of the wing 5 is applied revolves around the male screw shaft 12 and moves along the male screw shaft 12 at a preset speed. As the moving cylinder 14 connected to the female screw body 13 follows the movement of the female screw body 13, the wing opening / closing device 10 closes the wing 5. When the female screw body 13 reaches the limit, the motor 16 of the normal wing opening / closing device 10 is automatically stopped. Thereafter, a post-treatment (for example, mechanically locking the wing 5) is performed to cope with an unexpected opening operation of the wing 5 (for example, a malfunction of the motor 16), and the wing cart 1 is run.

[0022] According to this embodiment, the following effects can be obtained.

[0023] (1) In an emergency when the male screw shaft does not rotate when the motor starts to close the wing, by extracting the U-shaped pin from the connecting body and shifting the connecting body to a rotatable state, the female screw body can revolve and move along the male screw shaft, so that the wing opening / closing device can be closed in an emergency, thereby ensuring the running of the wing cart after the emergency.

[0024] (2) Since the wing opening / closing device can be closed in an emergency by a simple operation of extracting the U-shaped pin from the connecting body, the wing can be closed in an emergency without performing a difficult operation of manually rotating the male screw shaft.

[0025] (3) By using a dedicated extraction tool 50 with a hook attached to the tip of a long rod (see Fig. 4) to extract the U-shaped pin, high-altitude work can be avoided.

[0026] (4) By attaching a turnbuckle to the moving cylinder, the overall length of the wing opening and closing device can be adjusted, so that the wing can be properly installed on the body of the wing vehicle.

[0027] Fig. 6 shows the second embodiment of the present invention. The difference between this embodiment and the above embodiment is that the connecting shaft side insertion hole 37 is opened at the center in a plane perpendicular to the axis of the connecting shaft 34, and the pair of connecting body side insertion holes 38, 38 are opened at positions facing the connecting shaft side insertion hole 37 of the connecting body 30 so as to form a straight line with the connecting shaft side insertion hole 37. An R-shaped pin 43 as an anti-rotation member is slidably fitted into the connecting shaft side insertion hole 37 and the connecting body side insertion holes 38, 38, and the curved portion formed on the diagonal leg of the R-shaped pin 43 is engaged with the outer peripheral portion of the connecting body 30. According to this embodiment, the effect that the positioning ring 40, the stopper ring 41 and the washer 42 of the first embodiment can be omitted is obtained.

[0028] It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the gist thereof.

[0029] For example, as the anti-rotation member, not only U-shaped pins and R-shaped pins are used, but split pins and bolts may also be used.

[0030] The ball screw coupling for reducing the friction between the male screw shaft and the female screw body may be omitted in some cases.

[0031] ​In the above embodiment, a wing vehicle in which a pair of wing opening and closing devices are arranged at the front and rear of the body has been described, but the present invention can also be applied to a wing vehicle in which a single wing opening and closing device is arranged in the center of the body. [Explanation of symbols]

[0032] 1...Wing car, 2...Truck, 3...Body (wing body), 4...Support shaft, 5...Wing, 10...electric cylinder device, 12...male threaded shaft, 13...female threaded body, 14...movable cylinder, 15...reduction gear, 16...motor, 17...base, 18...body side mounting portion, 19...bracket, 20...Turnbuckle, 21...Bolt, 22...Turnbuckle body, 23...Tool engagement portion, 24...Mounting hole, 25...Pivot, 26...Bracket, 30...connecting body, 31...bolt, 32...bearing hole, 33...thrust bearing, 34...connecting shaft, 35...screw joint portion, 36...stopper ring, 37...Connecting shaft side insertion hole, 38...Connecting body side insertion hole, 39...U-shaped pin, 40...Positioning ring, 41...Stopper ring, 42...Washer, 43...R-shaped pin, 50...Tool specifically for extraction.

Claims

1. A wing opening / closing device of a wing car, comprising a male screw shaft rotatably supported, a female screw body screwed onto the male screw shaft and linearly moving along with the rotation of the male screw shaft, a moving cylinder moving together with the female screw body, and a motor for rotationally driving the male screw shaft, wherein the motor and the moving cylinder are respectively mounted on a wing body and a wing of the wing car. A bearing hole is formed in a connecting body moving together with the female screw body, a connecting shaft moving together with the moving cylinder is rotatably fitted in the bearing hole, and a rotation preventing member is detachably interposed between the connecting body and the connecting shaft. The wing opening / closing device of a wing car, characterized in that.

2. Insertion holes are formed in the connecting body and the connecting shaft, and the rotation preventing member is inserted through the insertion holes. The wing opening / closing device of a wing car according to claim 1, characterized in that.

3. A turnbuckle is mounted on the moving cylinder. The wing opening / closing device of a wing car according to claim 1 or 2, characterized in that.

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