JP2019182376A - Automatic gate opening/closing driving gear - Google Patents

Abstract

To provide an automatic gate opening/closing driving gear which can be easily mounted onto the lower side of a rear deck of a truck by narrowing the width in the vertical direction of a movable region of a link mechanism which rotationally driving a gate, improves structural strength and can improve the reliability and permits a long life of a device.SOLUTION: An automatic gate opening/closing driving gear includes a frame 16 fastened to a stand frame F, a driving arm 22 of which one end is freely rotatably attached to a lower part of an outer surface of a gate H and the other end is extended out to the lower side of the frame, an electric cylinder 18 which is attached to the frame and is provided with a cylinder rod 20 freely movably forward/backward, a first link mechanism 12 which is attached to the frame and is wholly oscillated and driven by forward and backward movement of the cylinder rod and a second link mechanism 14 which is attached to the frame, connects the other end of the driving arm and the first link mechanism and, at the same time, moves the other end of the driving arm between an extruding position and a pulling-in position along substantially horizontal direction in accordance with the oscillation of the first link mechanism.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an automatic tilt opening / closing drive device for opening / closing a tilt defining a side surface of a truck bed.

  Conventionally, the tilt that defines the side of the truck bed is quite heavy, and if you try to open and close it manually, considerable force is required, and workability is poor, Problems such as damage to the environment were pointed out.

As a mechanism for solving such a problem and automatically opening and closing the tilt, structures shown in Patent Document 1 and Patent Document 2 by the same applicant as the present applicant are known.

Utility Model Registration No. 3202670

Utility Model Registration No. 3207225

  In the two prior arts described above, there is certainly provided an opening / closing mechanism that can automatically open / close a heavy load, and the vertical width of the movable region of the link mechanism that rotationally drives the tilt. Therefore, it is possible to provide an automatic tilt opening / closing drive device that can be set narrowly and can easily achieve the mounting of the truck below the loading platform. As described above, the devices described in both patent documents have no problem from the viewpoint of achieving this object.

  By the way, the applicant of the present application, after filing the utility model registration application described in the above-mentioned patent documents, within the technical scope disclosed in the above-mentioned patent documents, to reliably improve the structural strength of the entire device. We have been further developing and researching specific structures that can be done. In other words, as the applicant of the present application, in order to further improve the structural strength, further improve the reliability of the device, and to ensure the long life of the device, the earnest and devoted efforts, especially the finite element method We have repeatedly developed and researched the automatic tilt opening / closing drive device developed by ourselves by repeatedly simulating the strength of each member against load strength.

  On the other hand, the optimum mounting position of the automatic tilt opening / closing drive device differs slightly depending on the type of truck and the truck body manufacturer. For example, the automatic tilt opening / closing drive device provided by the applicant of the present application is satisfactory in function. However, the truck industry has pointed out that it is difficult to adopt if the actual truck mounting position cannot be mounted at the optimum position.

  Furthermore, when mounting the automatic tilt opening / closing drive device, if the mounting operation to the truck body becomes complicated, the mounting man-hour will increase, resulting in an unnecessary increase in cost. Proposals to make it easy and reliable have been requested from assembly sites and repair shops.

  The present invention has been made in view of the above-described circumstances, and the vertical width of the movable region of the link mechanism that rotationally drives the tilt can be set narrow, so that the truck can be easily mounted below the loading platform. It is an object of the present invention to provide an automatic tilt opening / closing drive device that can improve the structural strength, further improve the reliability of the device, and reliably extend the life of the device. .

  Another object of the present invention is to provide an automatic tilt opening / closing drive device that can reliably cope with a difference in the mounting position of a device that differs depending on a track and can be easily mounted on a track.

  Another object of the present invention is to provide an automatic tilt opening / closing drive device capable of easily and reliably mounting the device on the track body.

  In order to solve the above-mentioned problems and achieve the object, the tilting switchgear according to the present invention is characterized in that, according to the first aspect of the present invention, in order to form the side surface of the loading platform of the body of the truck, In the automatic tilt opening / closing drive device for driving the tilt mounted in an openable manner between the closed position standing up and the open position hanging down, a frame integrally fixed to the underframe and one end of the frame One drive arm that is rotatably attached to the lower part of the outer surface of the tilt and whose other end extends to the lower side of the frame, an electric cylinder that is attached to the frame and includes a cylinder rod that can be moved forward and backward, and the frame A first link mechanism that is pivotally driven by the forward and backward movement of the cylinder rod, and the other end of the drive arm that is attached to the frame. While connecting with the first link mechanism, the other end of the drive arm is positioned immediately below the tilt in a state where the tilt is in the closed position in response to the swing of the first link mechanism. A second link mechanism that moves in a substantially horizontal direction between the push-out position to be pulled and a pull-in position that is pulled inwardly of the cargo bed while the tilt is in the open position, and drives the electric cylinder The first link mechanism and the second link mechanism extend along the forward / backward movement direction of the cylinder rod, and are arranged in a pair on the left and right sides with a central axis line interposed therebetween. A plurality of links, and a left and right independent link that is independently driven to swing left and right, and a left and right integrated link that is integrally connected to the left and right and that is integrally driven to swing. Iko It is characterized in.

  According to a second aspect of the automatic tilt opening / closing drive device according to the present invention, the electric cylinder 18 is attached to the frame so as to be swingable within a vertical plane, and the second link mechanism is mounted. It is arrange | positioned so that it may be located between a pair of right and left links which comprise, and the front-end | tip of the said cylinder rod is rotatably connected with one center part of the left-right integrated link which comprises the said 1st link mechanism. This is a feature.

  According to a third aspect of the present invention, in the automatic tilt opening / closing drive device, in the first link, the pair of left and right links positioned on the side of the electric cylinder are configured as left and right independent links. The pair of left and right links positioned below the electric cylinder is configured as a left and right integrated link.

  According to a fourth aspect of the present invention, there is provided the automatic tilt opening / closing drive device according to claim 4, wherein the electric cylinder has a surface perpendicular to the frame at a base end opposite to the side where the cylinder rod is provided. It is characterized by being swingably mounted inside.

    According to claim 5 of the automatic tilt opening / closing drive device according to the present invention, the track includes a plurality of tilts, and the automatic tilt opening / closing drive device includes a plurality of the automatic tilt opening / closing drive devices. The control means is configured to control each automatic tilt opening / closing drive device independently.

  According to a sixth aspect of the present invention, in the automatic tilt opening / closing drive device, the first link mechanism is integrated with a pair of left and right sides whose upper ends are swingably attached to the frame. A first oscillating link and a power link pivotally attached to a tip of the cylinder rod at an intermediate portion, and each pivotally connected to an upper portion of the first oscillating link; A pair of left and right power links that transmit the driving force of the electric cylinder to the first swing link to drive the first swing link, and one end at the lower end of each power link. A pair of left and right connecting links that are pivotably attached and transmit driving force from the electric cylinder to the second link mechanism, and one end at the lower end of each first swing link. Left and right independent And a pair of left and right push links that transmit the driving force from the electric cylinder to the second link mechanism in a state of cooperating with the connecting links. .

  According to a seventh aspect of the present invention, in the automatic tilt opening / closing drive device, the second link mechanism is located at an inward position where the cylinder rod of the electric cylinder is retracted most, and The other end is pushed out to the push-out position to hold the tilt in the closed position, and the other end of the drive arm is moved along the substantially horizontal direction from the push-out position according to the protrusion of the cylinder rod. Withdrawing toward the lower inside, the other end of the drive arm is drawn to the innermost drawing position of the floor at the protruding position where the cylinder rod protrudes the most, and the tilt is held in the open position. In response to the pull-in from the projecting position, the other end of the drive arm is moved outward in a substantially horizontal direction to the push-out position, and the tilt is moved to the closed position. It is characterized in that it is configured to rotate.

  In the automatic tilt opening / closing drive device according to the present invention, the second link mechanism can swing freely in a state where the upper ends of the second link mechanisms are independent of the left and right sides of the frame. A pair of attached left and right second swing links, and swinging in a state in which the upper ends of the second swing links are inwardly displaced from the second swing link by a predetermined distance and the left and right side surfaces of the frame are independent from each other. A pair of left and right third swing links that are freely attached, and a pair of left and right rolling links that are pivotally attached to lower ends of the second and third swing links, respectively. A pair of left and right Chebyshev links, a pair of left and right swing cams having first to third tops, and a first top of each of the swing cams pivotable at one end. Installed and front A pair of left and right cam drive links in which the other end of each of the connecting links is rotatably attached to the intermediate part, each other end of each of the cam drive links and each intermediate part of the second swing link, A pair of left and right first auxiliary connecting links rotatably attached at both ends, a second top of each of the swing cams, and a lower end of each of the drive arms are attached rotatably at both ends. A pair of left / right pull-in / push-out links, a lower portion of each of the drive arms at one end, and a midpoint of each of the rolling links and a third top portion of each of the swing cams at an intermediate portion are freely rotatable. A pair of left and right guide links attached to each other, and a pair of left and right second links in which the other end of each of the guide links and the middle part of each of the third swing links are rotatably attached to both ends. With auxiliary link It is characterized in that.

  According to a ninth aspect of the present invention, there is provided the automatic tilt opening / closing drive device according to the ninth aspect, wherein the second swing link, the third swing link, the rolling link, the guide link, the first and the second swing links. Each of the second auxiliary connecting links is configured as a left and right independent link, and each of the swing cam, the cam drive link, and the retracting / pushing link is configured as a left and right integrated link.

  Further, according to the automatic tilt opening / closing drive device according to the present invention, each push link includes the middle point of the rolling link of the second link mechanism and the first link mechanism. The lower end of the first oscillating link is rotatably connected to both ends, and the third top portion of the swing cam of the second link mechanism is connected to one end of the push link and the middle of the rolling link. The middle of the rolling link to which the push link is connected in response to the swing of the first swing link of the first link mechanism by the forward and backward movement of the cylinder rod of the electric cylinder. The point is reciprocated along a substantially horizontal direction, and the drive arm connected to the guide link and the pull-in / push-out link moves between the push-out position and the pull-in position. Is moved, the tilt is characterized in that is reciprocally rotated between a closed position and an open position.

  In the automatic tilt opening / closing drive device according to the present invention, the lowest position (bottom dead center) along the vertical direction of the moving area of the first and second link mechanisms is the swing. It is defined by the lowest position in the movement region of the lower end of the cam.

  According to a twelfth aspect of the present invention, there is provided an automatic tilt opening / closing drive device according to the twelfth aspect of the present invention, in order to form a side surface of the loading platform of the body of the truck. In an automatic tilt opening and closing drive device for opening and closing a tilt mounted so as to be openable and closable with respect to a position, a frame integrally fixed to the underframe and one end of which is rotatable to a lower portion of the outer surface of the tilt The drive arm is attached to the frame, and the other end extends to the lower side of the frame. The electric cylinder is attached to the frame and is provided with a cylinder rod so that the cylinder rod can be moved forwards and backwards. A first link mechanism that is pivotally driven, and is attached to the frame, and connects the other end of the drive arm and the first link mechanism. In addition, in response to the swing of the first link mechanism, the other end of the drive arm is pushed out immediately below the tilt in the state where the tilt is in the closed position, and the tilt is in the open position. A second link mechanism that moves in a substantially horizontal direction between a retracted position that is retracted to the lower inner side of the loading platform in a state in which the electric cylinder is in operation, and a control unit that drives and controls the electric cylinder, The frame is attached in a state where its front end surface is in close contact with the inner surface of the underframe of the track. Between the frame and the underframe, a frame slide means that allows the frame to slide in the lateral direction is interposed. It is characterized by having.

  According to a thirteenth aspect of the automatic tilt opening / closing drive device according to the present invention, the frame slide means is formed in a state of penetrating in the thickness direction on the tip surface of the frame, At least one long groove extending along the direction, a slide plate disposed so as to cover the long groove and slidable along the lateral direction, and facing the long groove on the slide plate At least two fixing nuts, and at least two mounting nuts arranged in the base frame in communication with the long groove and spaced apart in the lateral direction. A hole is formed, and a bolt portion of a fixing bolt inserted from the outside through the mounting hole formed in the underframe is screwed into the fixing nut in a state of being inserted through the long groove. By The frame is attached to the underframe with its position adjusted in the lateral direction, and the frame is fixed between the two by tightening the fixing bolt against the fixing nut. It is fixed to the frame.

  According to a fourteenth aspect of the present invention, there is provided an automatic tilt opening / closing drive device according to the fourteenth aspect of the present invention, in order to constitute a side surface of the loading platform of the body of the truck, a closed position standing on the underframe of the floor of the loading platform and an opening that hangs down. In an automatic tilt opening / closing drive device for opening and closing a tilt mounted so as to be openable and closable with respect to a position, a frame integrally fixed to the underframe D and one end thereof are freely rotatable at a lower portion of the outer surface of the tilt The other end of the drive arm is extended to the lower side of the frame, the electric cylinder is attached to the frame and is provided with a cylinder rod so that the cylinder rod can be moved forward and backward, and the frame is attached to the frame. A first link mechanism that is generally driven to swing, and is connected to the frame and connects the other end of the drive arm and the first link mechanism. And, in response to the swing of the first link mechanism, the other end of the drive arm is pushed to the pushing position where the tilt is in the closed position and the tilt is opened. A second link mechanism that moves in a substantially horizontal direction between a retracted position that is retracted to the lower inner side of the loading platform in a position, and a control means that controls the drive of the electric cylinder, The drive arm is fixedly attached so as to connect the tilt and the second link mechanism to each other via a drive arm attaching / detaching means.

  According to a fifteenth aspect of the present invention, in the automatic tilt opening / closing drive device, the drive arm is detachably attached to an arm main body and a lower portion of the arm main body, and the second link mechanism is And a connecting portion to be connected to each other so that they can be joined together. The drive arm attaching / detaching means includes a plurality of first screws for detachably attaching the lower portion of the arm body to the connecting portion. The lower portion of the arm main body is fixedly attached to the connecting portion to which the second link mechanism is connected via the plurality of first screws.

  According to a sixteenth aspect of the present invention, in the automatic tilt opening / closing drive device, the drive arm attaching / detaching means is a bearing member for detachably attaching a support shaft attached to an upper end of the arm body to the tilt. And a second screw for fixedly attaching the bearing member to the tilt and a screw insertion hole formed in the bearing member, and a lower portion of the arm body is fixedly attached to the connecting portion. And a screw hole into which the second screw is screwed into the tilt in a state where the upper end of the arm body temporarily fixes the bearing member provided to cover the support shaft to the tilt. Is tapped through a screw insertion hole formed in the bearing member, and the second screw is fixed to the screw hole through the screw insertion hole. By screwing on, it is characterized in that the drive arm is mounted in a state of connecting to each other and said tilt and the second link mechanism.

  The operation of the problem solving means described in claim 1 is as follows. That is, under the control of the control device, the first link mechanism is entirely driven to swing relative to the frame by the forward and backward movement of the cylinder rod of the electric cylinder, and this swing is driven by the second link mechanism. It is converted into a substantially horizontal movement, and the horizontal movement of the second link mechanism is transmitted to the tilt via the drive arm and is rotationally driven between the standing closed position and the hanging open position. Become. Thus, the second link mechanism converts the swing of the first link mechanism into a horizontal movement and transmits it to the drive arm, so that the first and second link mechanisms can be moved below the floor of the loading platform. The vertical width of the region can be narrowed, and the automatic tilt opening / closing drive device can be mounted on the lower side of the loading platform of the truck. Each of the link mechanism and the second link mechanism includes a plurality of links that extend in the forward / backward movement direction of the cylinder rod, and that are arranged in a pair of left and right sides with the central axis interposed therebetween, and are independent of each other on the left and right sides. The left and right independent links that are driven to swing and the left and right integrated links that are integrally connected to the left and right and that are integrally driven to swing are provided in a mixed state. Trust With further improve the, so that it is possible to achieve the effect that would can be achieved with certainty the life of the device.

  According to the problem solving means described in claim 2, the electric cylinder 18 is swingably attached to the frame within a vertical plane, and between the left and right independent links constituting the second link mechanism. Since the tip of the cylinder rod is pivotally connected to one central part of the left and right integrated links constituting the first link mechanism, the driving force from the electric cylinder However, the effect of being reliably transmitted to the first link mechanism in a balanced manner can be achieved.

  According to the problem solving means described in claim 3, a pair of left and right independent links are arranged across the electric cylinder placed in the middle of the apparatus, and the pair of left and right links positioned below the electric cylinder is Since it is configured as one continent on the left and right, it is possible to produce an effect that the force from the first link mechanism can be transmitted to the drive arm with a stronger strength.

  According to the problem solving means described in claim 4, the electric cylinder is swingably attached to the frame at the base end portion opposite to the side where the cylinder rod is provided. The height of the tip position of the piston rod changes when the tilt is driven to open and close in accordance with the forward / backward drive of the piston rod. This change in the height is ensured by swinging the electric cylinder. It is possible to achieve an effect that is not absorbed by the piston rod and an unnecessary load is not applied to the piston rod.

  Further, according to the problem solving means described in claim 5, a plurality of the automatic tilt opening / closing drive devices are provided for each truck, and the control devices are respectively attached to the tilts provided for each truck. Since the automatic tilt opening / closing drive device is controlled independently, the opening / closing operation of each tilt is controlled independently. The tilt is not unintentionally driven to open and close, and the effect of ensuring safety can be achieved.

  According to the problem-solving means described in claim 6, the first link mechanism includes a first swing link that is swingably attached to the frame and a power link in which the tip of the cylinder rod is connected. Therefore, it is possible to produce an effect that the forward / backward movement of the cylinder rod of the electric cylinder is reliably converted into swing.

  Further, according to the problem solving means described in claim 7, the second link mechanism can be used to reliably transmit the swing of the first link mechanism to the tilt as the tilt opening / closing driving force. It will be possible to achieve the effect.

  According to the problem solving means described in claim 8, as the second link mechanism, a pair of left and right second and third swing links that are swingably attached to the frame, and second and third Since a pair of left and right Chebyshev links are provided from a pair of left and right rolling links that connect the lower ends of each of the swing links, the swing of the first link mechanism is reliably converted into a substantially horizontal movement. It is possible to achieve an effect that can be achieved.

  Further, according to the problem solving means of claim 9, the second swing link, the third swing link, the rolling link, the first and second auxiliary connection links, and the guide link are: Each is configured as a left and right independent link, and the swing cam, the cam drive link, and the pull-in / push-out link are configured as a left and right integrated link, so that the force received from the first link mechanism is applied to the drive arm. The effect that it can be transmitted reliably can be produced.

  According to a tenth aspect of the present invention, the drive arm connected to the guide link and the pull-in / push-out link is reciprocated between the push-out position and the pull-in position, and the tilt is closed. The effect that the reciprocating rotation is reliably performed between the position and the open position can be achieved.

  According to the problem solving means of claim 11, the lowest position (bottom dead center) along the vertical direction of the moving area of the first and second link mechanisms is the lowest position in the moving area of the lower end of the swing cam. Therefore, the height dimension can be set short and the effect that it can be arranged in a narrow region under the floor of the cargo bed can be achieved.

  According to the problem solving means described in claim 12, since the frame slide means for allowing the frame to slide in the lateral direction is interposed between the frame and the frame, it varies depending on the track. The difference in the mounting position of the apparatus can be dealt with with certainty, and an effect that can be easily mounted on the track can be achieved.

  Moreover, according to the problem-solving means according to claim 13, the bolt portion of the fixing bolt inserted from the outside through the mounting hole formed in the underframe is inserted in the long groove. By screwing onto the fixing nut, the frame is attached to the underframe with its position adjusted along the lateral direction, and by tightening the fixing bolt against the fixing nut. Since the frame is fixed to the underframe between the two, it is possible to surely cope with the difference in the mounting position of the device that differs depending on the track, and it is possible to easily attach to the track. Will be able to.

  According to the problem solving means of claim 14, the drive arm is detachably attached at least to the tilt via the drive arm attaching / detaching means. An effect that can be surely performed can be achieved.

  According to another aspect of the present invention, the second link mechanism is connected to the connecting portion of the drive arm, which is separated in advance from the arm body and the connecting portion, after the device is attached to the frame of the truck. The lower part of the arm body of the drive arm is fixedly attached to the connecting part to which the second link mechanism is connected via the plurality of first screws. Therefore, it is possible to achieve an effect that the attaching operation to the connecting portion is easily and reliably performed.

  According to the problem-solving means according to claim 16, the upper part of the arm body of the drive arm is fixed after the lower part of the arm body is fixedly attached to the connecting part to which the second link mechanism is connected. , Fixedly attached to the tilter via a bearing member, whereby a connecting portion to which the tilter and the second link mechanism are connected is connected to each other via an arm body, and the tilter is driven by a drive arm. It is possible to produce an effect of being surely coupled to the device and being reliably opened and closed between the closed position and the open position based on the operation of the drive device.

  As described above, according to the present invention, the vertical width of the movable region of the link for rotationally driving the tilt can be set narrow, and the mounting of the truck under the loading platform can be easily achieved. A tilting switch that can be provided is provided.

  Further, according to the present invention, there is provided an automatic tilt opening / closing drive device that can surely cope with the difference in the mounting position of the device that differs depending on the track and can be easily mounted on the track.

  Further, according to the present invention, there is provided an automatic tilt opening / closing drive device capable of easily and reliably mounting the device on the track body.

  It is a side view which shows roughly the track | truck with which the automatic tilt opening / closing drive device of the structure of one Example concerning this invention is mounted | worn.   The structure of one embodiment of the automatic tilt opening / closing drive device according to the present invention, which is attached under the floor of the truck bed shown in FIG. 1, is in the closed position where the tilt is raised (the tilt rotation angle is 0 degree). In the state, it is a side view which shows all the overlapping parts of components using a solid line instead of a hidden line.   FIG. 3 is a perspective view showing the structure of the automatic tilt opening / closing drive device shown in FIG. 2 as viewed from obliquely below.   FIG. 3 is a perspective view showing a state in which the configuration of the electric cylinder shown in FIG. 2 is taken out and seen from obliquely above.   It is a perspective view shown in the state which looked up from diagonally downward, enlarging the attachment state (however, the state in which the tilt was rotated to the fully open position) to the frame of an electric cylinder.   FIG. 2 is a side view showing the structure of the automatic tilt opening / closing drive device shown in FIG. 1 using solid lines instead of hidden lines for overlapping parts in a state where the tilt is rotated about 45 degrees from the closed position.   FIG. 7 is a perspective view showing the structure of the automatic tilt opening / closing drive device shown in FIG. 6 as viewed from obliquely below.   FIG. 1 is a side view showing the structure of the automatic tilt opening / closing drive device shown in FIG. 1 in which the tilt is rotated about 90 degrees from the closed position and opened in a horizontal state, and all overlapping parts of the parts are shown using solid lines instead of hidden lines. is there.   It is a perspective view which shows the structure of the automatic tilt opening / closing drive device shown in FIG. 8 in the state which looked up from diagonally downward.   FIG. 2 is a side view showing the structure of the automatic tilt opening / closing drive device shown in FIG. 1 using solid lines instead of hidden lines for overlapping parts in a state where the tilt is rotated about 135 degrees from the closed position.   It is a perspective view which shows the structure of the automatic tilt opening / closing drive apparatus shown in FIG. 10 in the state looked up from diagonally downward.   1 is a side view showing the structure of the automatic tilt opening / closing drive device shown in FIG. 1 using solid lines instead of hidden lines for overlapping parts in a state in which the tilt is rotated about 175 degrees from the closed position to be in a fully open state. It is.   It is a perspective view which shows the structure of the automatic tilt opening / closing drive device shown in FIG. 12 in the state which looked up from diagonally downward.   It is a perspective view which shows the structure of the automatic tilt opening / closing drive device shown in FIG. 12 in the state seen from diagonally backward.   It is the perspective view shown in the state which took out the flame | frame which comprises an automatic tilt opening / closing drive device, and looked up from diagonally lower right.   It is a perspective view which shows the frame shown in FIG. 15 in the state which looked down from diagonally right upper.   It is a perspective view shown in the state where it looked up from diagonally right below in the state where the electric cylinder attachment mechanism and the frame slide mechanism were attached to the frame.   It is sectional drawing which shows the structure of the front-end | tip part vicinity of the flame | frame shown in FIG. 18 in the state cut | disconnected along the XX line of FIG.   FIG. 20 is a cross-sectional view showing a state in which a front end portion of the frame shown in FIG.   FIG. 3 is a perspective view showing a drive arm attaching / detaching mechanism of the automatic tilt opening / closing drive device shown in FIG. 2 as viewed from the left front.   FIG. 21 is a perspective view showing the structure of the automatic tilt opening / closing drive device shown in FIG. 20 in a state before the arm main body of the drive arm is attached although the connecting portion of the drive arm is attached.   It is a block diagram which shows the structure of the control system in this Example.

  Embodiments of an automatic tilt opening / closing drive device according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 shows a schematic configuration of a large truck (for example, 25t truck) A to which an automatic tilt opening / closing drive apparatus 10 (hereinafter simply referred to as “drive apparatus 10”) of the present invention is mounted. A truck body B to which six-wheel tires C are attached and a loading platform D mounted on the truck body B are configured. The loading platform D is pivotally attached to the platform F (shown in FIG. 2 and subsequent figures) that holds the periphery of the floor E of the loading chamber and the left and right loading frames F via hinges G. To fix the lower part of the left and right sides of the door in a releasable manner (specifically, a pair of right and left sides, a total of four slopes H are provided) and to fix each slope H in the standing closed position. The column I is provided with pillars I standing upright at the left and right intermediate portions and end portions of the frame F and wings J that cover the upper space of the cargo compartment so as to be openable.

  Below the underframe F, various parts and auxiliary machines are arranged at predetermined intervals, and the structural members are arranged in a state of being stretched vertically and horizontally. The empty space below (that is, the device attachment allowable range from the lower surface of the underframe F) is considerably narrow. Specifically, the dimension of the empty space in the height direction is, for example, only about 150 mm in the case of a 25 t track, and conversely, the driving device 10 of this embodiment is a device. The movable region is configured within the range of 140 mm in the height direction. For the first time, the drive device 10 can be mounted on the track A by downsizing the drive device 10.

  The drive device 10 of this embodiment is for automatically opening and closing each tilt H without borrowing the power of an operator. The drive frame 10 of the floor frame F corresponds to each of the four tilts H. It is attached to the empty space below. First, the downsizing of the driving device 10 (the restriction in the height direction) constitutes one of the features of the present invention, but it is not necessary to borrow the power of the operator. As a result, the driver of the truck A As a result, it will be possible to employ weak people such as the elderly and women, and a shortage of drivers in the transportation industry using truck A will be pointed out. As such, it can be expected to be highly regarded as an industrial applicability.

  FIG. 2 shows a drive device 10 for opening and closing the tilting head H located at the left front in a narrow movable region with respect to the height direction of this embodiment, and shows each member in a state of looking forward from the rear. The overlapping part is drawn in a state shown by a solid line, not a hidden line. As described above, in FIG. 2, since the overlapping of the lines is complicated and it is slightly difficult to see, the structure itself shown in FIG. 2 is easily shown as a perspective view looking up obliquely from below in FIG. In the following embodiments, the drive device 10 that opens and closes the front left-hand side tilt H will be described. However, the present invention is not limited to this configuration, and by attaching each corresponding to the other three tilts H, Similarly, it goes without saying that each tilting H can be driven to open and close.

  As shown in FIGS. 2 and 3, the driving device 10 has a lateral frame perpendicular to the longitudinal direction of the body B (that is, the front-rear direction / the direction perpendicular to the drawing sheet) on the frame F of the loading platform D of the track A. The frame 16 is fixedly attached so as to extend along a direction (that is, a horizontal direction in the drawing). As will be described in detail later, the frame 16 is fixedly attached to the base frame F in a state in which the attachment position along the longitudinal direction of the cargo bed D can be adjusted via the frame slide mechanism 34. The frame 16 is fixed at the mounting position along the longitudinal direction of the loading platform D via the frame slide mechanism 34 to a position corresponding to each track A, and the fixing work is performed. Thereafter, both sides thereof are fixed to the frame F via frame mounting stays K (shown at least in FIGS. 3 and 5). Thereby, the frame 16 is firmly attached to the underframe F.

  As will be described in detail below, the frame 16 is attached with first and second link mechanisms 12 and 14 that mainly constitute the drive mechanism 10. The structure of the frame 16 will be described in detail later with reference to FIGS.

  An electric cylinder 18 constituting a drive source of the drive device 10 is attached to the frame 16 at its base end portion so as to be swingable in a vertical plane via a support shaft 18A. In this embodiment, the electric cylinder 18 employs, for example, “Stroke Motor UP Series” (trade name) manufactured by Nikken Co., Ltd. As shown in FIG. The electric motor 18a that is rotationally driven by the control shown in FIG. 22, the drive cylinder 18b that is provided with the cylinder rod 20 so as to be able to advance and retract, and the driving force of the electric motor 18a are transmitted to the drive cylinder 18b. And a power transmission unit 18c for driving the cylinder rod 20 forward and backward. The electric cylinder 18 is arranged so as to drive forward and backward so as to push out or retract the cylinder rod 20 along the extending direction of the frame 16, that is, along the lateral direction of the loading platform D.

  As shown in FIG. 4, the electric cylinder 18 is attached to the frame 16 via an electric cylinder attachment mechanism 32 so as to be swingable in a vertical plane. Specifically, the electric cylinder mounting mechanism 32 includes a pair of support stays 32a: 32b extending along the lateral direction of the loading platform D and spaced apart from each other along the longitudinal direction of the loading platform D in a standing state. The stay 32a: 32b is fixed in an upright state, and includes a mounting plate 32c fixed to the lower surface of the top plate 16d of the frame 16. Both the support stays 32a: 32b have both ends of the support shaft 18A described above. Shaft support holes 32d: 32e that are rotatably supported are formed in a state of penetrating in the thickness direction.

  Here, a support shaft 20A for connecting to the power link 30 of the first link mechanism 12 described later is attached to the tip of the cylinder rod 20 described above via a mounting bracket 20B. The extension direction of the support shaft 20A is set so as to be parallel to the support shaft 18A described above. Since the drive cylinder mounting mechanism 32 is thus configured, the electric cylinder 18 is mounted on the frame 16 so as to be swingable within a vertical plane around the support shaft 18A, and the cylinder rod 20 is driven forward and backward. More specifically, the power can be transmitted to the link mechanism 12, specifically, to the power link 30 constituting the first link mechanism 12.

  2 and 3 show a state in which the tilting H is in the upright closed position, and the driving device 10 includes a driving arm 22 directly connected to the tilting H. The drive arm 22 is provided to open and close between a closed position in which the tilt H is upright and an open position that hangs vertically downward as shown in FIGS. Specifically, the drive arm 22 includes an arm body 22a having a support shaft 22A attached to a tilting H at one end (upper end in the drawing), and the other end (in the drawing, in the drawing). The connecting shaft 22A is detachably attached to the lower end), and the above-described support shaft 22A is driven at a position substantially ¼ from below with respect to the height direction of the outer surface of the tilt H. It is pivotally supported via an arm attaching / detaching mechanism 26 so as to be rotatable. Similarly, the connecting portion 22b is detachably attached to a guide link 44 constituting a second link mechanism 14 to be described later via a drive arm attaching / detaching mechanism 26.

  The drive device 10 constitutes the most important feature of the present invention. The drive device 10 is attached to the frame 16 and is driven to swing by the forward / backward movement of the cylinder rod 20 of the electric cylinder 18. The other end (lower end) of the drive arm 22 and the first link mechanism 12 are connected to each other, and the other end of the drive arm 22 is closed so that the tilt H stands up in response to the swing of the first link mechanism 12. A push-out position located immediately below the tilt H in the position, and a pull-in position drawn inside the floor E of the loading platform D in the open position where the tilt H hangs downward in the vertical direction; And a second link mechanism 14 that moves in a substantially horizontal direction.

  Hereinafter, the structures of the first and second link mechanisms 12 and 14 will be described in detail in sequence. The first and second link mechanisms 12 and 14 are respectively along the forward and backward movement directions of the cylinder rod. And a plurality of links arranged in a pair of left and right sides with a central axis interposed therebetween, and the most characteristic configuration of the present invention is as follows. Are integrally connected and provided with a left and right integrated link that is integrally driven to swing.

  First, the first link mechanism 12 described above includes a first swing link 24 whose upper end is swingably attached to the frame 16 via a support shaft 24A, and the tip of the cylinder rod 20 via the support shaft 20A. And a power link 30 rotatably attached to the intermediate portion. Here, the upper end of the power link 30 is rotatably attached to the upper portion of the first swing link 24 via the support shaft 30A. Accordingly, the power link 30 rotates around the support shaft 30A according to the forward / backward movement of the cylinder rod 20, and the first swing link 24 swings around the support shaft 24A according to the rotation of the power link 30. It will be driven dynamically.

  Here, as shown in FIG. 3 in particular, the first swing link 24 described above is a pair of left and right link main bodies 24a; 24b (the right link main body 24b is located on the back side in the drawing and is not displayed. , And a connecting portion 24c that couples the link main bodies 24a and 24b to each other. Thereby, the 1st rocking | fluctuation link 24 comprises the left-right integrated link.

  On the other hand, the power link 30 described above is displayed hidden behind the left link body 30A in FIG. 3 as a pair of left and right link bodies 30a; 30b and a connecting portion 30c that connects the link bodies 30a; 30b to each other. Although not shown in FIG. 2, it is integrally formed. Thereby, the power link 30 also comprises the left-right integrated link.

  Further, the first link mechanism 12 further connects the lower end of the power link 30 and the intermediate portion of the cam drive arm 48 constituting the second link mechanism 14 described later via a support shaft 28A and a support shaft 28B, respectively. The link link 28 that is pivotably attached, the lower end of the first swing link 24, and the intermediate portion of the rolling link 40 that constitutes the second link mechanism 14 are respectively connected via support shafts 24B and 40C. And a push link 42 that is rotatably attached.

  Here, as shown in FIG. 3, the connecting link 28 described above is integrally formed from a pair of left and right link bodies 28a; 28b and a connecting portion 28c that connects the link bodies 28a; 28b to each other. . Thereby, the connecting link 28 also constitutes a left-right integrated link. On the other hand, since the push links 42 are located inside the driving device 10 as shown in the figure, the push links 42 are arranged in a pair of left and right in an independent state without being able to connect each other. Thereby, the push link 42 constitutes a left and right independent link. However, since each push link 42 is not connected to the left and right, in order to ensure the strength, bent pieces 42c (shown in FIG. 2) for improving the strength are provided on the upper and lower side edges of each push link 42. It is integrally formed. Thereby, each push link 42 is left and right independent, but sufficient strength is ensured, and the force transmitted from the first swing link 24 is applied to the rolling link 40 constituting the second link mechanism 14. It can be transmitted reliably.

  As described above, in the first link mechanism 12, the first swing link 24, the connecting link 28, and the power link 30 constitute a left-right integrated link, and the push link 42 constitutes a left-right independent link. The first link mechanism 12 includes a left-right integrated link and a left-right independent link which are one of the features of the present invention.

  Next, the second link mechanism 14 described above will be described. The second link mechanism 14 is configured so that the other end (that is, the connecting portion 22b) of the drive arm 22 is tilted while the cylinder rod 20 of the electric cylinder 18 is most retracted (the state shown in FIGS. 2 and 3). The tilting H is biased to the pushing position immediately below H and the tilting H is held in the closed position, and the other end of the drive arm 22 is substantially horizontal from the pushing position just below the tilting H in response to the protrusion of the cylinder rod 20. Pull in toward the lower inner side of the floor of the cargo compartment D along the direction (rotation position 45 degrees from the closed position of the tilt H shown in FIGS. 6 and 7 → from the closed position of the tilt H shown in FIGS. 8 and 9 90-degree rotation position (substantially horizontal position) → 135-degree rotation position from the tilt position of the tilting H shown in FIGS. 10 and 11 → 175-degree rotation from the tilting position of the tilting H shown in FIGS. Position (open position)), At the protruding position (the position shown in FIGS. 12 and 13) where the Linda rod 20 protrudes most, the other end (the connecting portion 22b) of the driving arm 22 is pulled to the innermost drawing position of the floor of the cargo compartment D, Is held in an open position that hangs down substantially vertically downward, and conversely, the other end (connecting portion 22b) of the drive arm 22 faces outward in a substantially horizontal direction in accordance with the pull-in from the protruding position of the cylinder rod 22. It moves to the pushing position mentioned above along, and it has the structure which can be reversibly rotated to the closed position which stands up the tilt H.

  More specifically, the second link mechanism 14 includes a pair of left and right second swing links 36 whose upper ends are swingably attached to the frame 16 via support shafts 36A, and each second swing mechanism. A pair of left and right third rocking links 38 whose upper ends are swingably attached to the frame 16 via a support shaft 38A while being biased inward by a predetermined distance from the moving link 36, and second and third And a pair of left and right rolling links 40 that are pivotally attached to both ends via support shafts 40A and 40B, respectively, and a pair of left and right so-called “Chebyshev links” are provided. The length and position of each of the rolling links 40 are defined so as to be configured, thereby achieving the function of allowing the midpoints of both ends of each rolling link 40 to move substantially horizontally. A support shaft 40 </ b> C that performs an important function in pushing / retracting the connecting portion 22 b at the lower end of the drive link 22 in a substantially horizontal direction is attached to the midpoint between both ends of each rolling link 40.

  Here, the pair of left and right second rocking links 36 and the third rocking link 38 described above cannot be configured as left and right integrated links for convenience of being located on both sides of the electric cylinder 18, It is configured as a left and right independent link. In addition, for the convenience of the second and third swing links 36 and 38 being spaced apart on the left and right sides, the rolling link 40 connected to both is also configured as a left and right independent link. That is, the second and third links 36 and 38 and the rolling link 40 constituting the Chebyshev link are configured as left and right independent links.

  Further, the pair of left and right push links 42 of the first link mechanism 12 described above are the same as the first link mechanism in the second link mechanism 14 and the midpoints of both ends of the pair of left and right rolling links 40 constituting the Chebyshev link. The first swing link 24 is connected to the lower end of the first swing link 24 via the support shafts 40C and 34B so that the drive force from the drive cylinder 20 is a pair of left and right rolling links. 40.

  On the other hand, the second link mechanism 14 includes a pair of left and right guide links 44 that are rotatably attached to the support shaft 40C of the rolling link 40 at the center portion. Each guide link 44 is rotatably attached to both sides of the connecting portion 22b located at the lower end of the drive arm 22 via a support shaft 44A. That is, the push link 42 and the guide link 44 are swung on the support shaft 40C attached to the middle point of the rolling link 40, which is regulated to move horizontally by forming a so-called “Chebyshev link”. Since the first link mechanism 12 is swung through the push link 42, the support shaft 40C is restricted so that it can move only in the horizontal direction. The guide link 44 moves along the horizontal direction in response to the swing of the first link mechanism 12, and as a result, the lower end of the drive arm 22 to which the guide link 44 is rotatably connected via the support shaft 44A. The connecting portion 22b is moved along a substantially horizontal direction.

  On the other hand, the left and right independent guide links 44 are respectively connected to both sides of the connecting portion 22b of the drive arm 22 via a support shaft 44A and to the left and right independent rolling links 40 via a support shaft 40C. In addition, the left and right independent first auxiliary links 52 are connected to the lower ends of the left and right independent auxiliary links 52 through the support shafts 44B, respectively, and the drive arm 22 is moved back and forth in the substantially horizontal direction between the retracted position and the pushed-out position. It performs an important function. Therefore, when both guide links 44 transmit the driving force of both rolling links 40 to the drive arm 22, the reinforcing link 56 is provided between the support shaft 40C and the support shaft 44A so that sufficient transmission strength is maintained. Are additionally connected in an independent state.

  As is clear from the above description, in the structure of this embodiment, a so-called “Chebyshev link” is configured, and thus the support shaft 40C whose movement is regulated to be substantially horizontal is an extremely important function. 2, 6, 8, 10, and 12, the support shaft 40 </ b> C is indicated by a black circle.

  Further, the second link mechanism 14 further includes a pair of left and right swing cams 46 having three top portions α, β, and γ and formed in a substantially triangular shape, and a first top portion α of each swing cam 46. A pair of left and right cam drive links 48 for pivotally driving the swing cam 46 is provided through a support shaft 40A. The left end in the figure of the pair of left and right connecting links 28 of the first link mechanism 12 is rotatably connected to the intermediate portion of each cam drive link 48 via a support shaft 28B. The driving force from 18 is transmitted to the pair of left and right cam drive links 48 via the pair of left and right connecting links 28, whereby the pair of left and right swing cams 46 are rotationally driven around the support shaft 40C.

  Here, the swing cam 46 described above is integrally formed from a pair of left and right cam plates 46a; 46b and a connecting portion 46c for connecting the cam plates 46a; 46b to each other, as shown in FIG. Yes. Thus, the swing cam 46 constitutes a left and right integrated link (cam). The cam drive link 48 described above also forms a left-right integrated link from a pair of left and right link bodies 48a; 48b and a connecting portion 48c that couples the link bodies 48a; 48b to each other. Thus, the cam drive link 48 that receives the drive force from the drive cylinder 18 and the swing cam 46 that is rotationally driven by the drive force from the cam drive link 48 are both configured as a left-right integrated link. A sufficiently secured structure will be provided.

  In addition, the right end of the pair of left and right guide links 44 in the drawing and the middle portion of the pair of left and right third swing links 38 are attached to a pair of left and right pivots that are rotatably attached via support shafts 44B and 52A, respectively. One auxiliary link 52 (corresponding to the second auxiliary connection link in the claims) is connected to each other. On the other hand, the upper ends of the pair of left and right cam drive arms 48 and the middle part of the pair of left and right second swing links 36 are attached to a pair of left and right second shafts rotatably attached via support shafts 54B and 54A, respectively. The auxiliary links 54 (corresponding to the first auxiliary connecting link in the claims) are connected to each other.

  Further, the second apex β of the pair of left and right swing cams 46 and the connecting portion 22b of the pair of left and right drive arms 22 are a pair of left and right retractions that are rotatably attached to both ends via support shafts 50A and 50B. / They are connected to each other by an extrusion link 50. Further, the left ends of the pair of left and right push links 42 described above are connected to the third apex γ of the pair of left and right swing cams 46 via the support shaft 40C described above. Here, the pull-in / push-out link 50 described above forms a left-right integrated link from a pair of left and right link main bodies 50a; 50b and a connecting portion 50c that connects the two link main bodies 50a; 50b to each other. As described above, since the pull-in / push-out link 50 that finally transmits the driving force from the electric cylinder 18 to the driving arm 22 is configured as a left and right integrated link, a structure sufficiently secured in strength is provided. It will be.

  That is, the connecting portion 22b that is directly connected to the tilting H and attached to the lower end of the drive arm 22 for rotationally driving the tilting H around the hinge G is guided by the pivoting operation of the swing cam 46. In a state in which 44 and the pull-in / push-out link 50 cooperate, the reciprocation is performed between the push-out position and the pull-in position.

  As described above, the third top γ of the swing cam 46 is rotatably attached to the middle point of the rolling link 40 through the support shaft 40C together with the other end of the push link 42. In response to the swing of the first swing link 24 of the first link mechanism 12 due to the advancement and retraction of the rod 20, the middle point of the rolling link 40 to which the push link 42 is connected is reciprocated along a substantially horizontal direction. The drive arm 22 to which the guide link 44 and the pull-in / push-out link 50 are coupled is reciprocated between the push-out position and the pull-in position, and the tilt H is reciprocated between the closed position and the open position. It will be.

  Note that the substantially triangular shape defined by the three vertices α, β, γ of each swing cam 46 is defined by an unequal triangular shape in this embodiment. Thus, since each swing cam 46 is formed in an unequal triangular shape, a support shaft 40C (vertex γ) to which the push link 42 is connected and a support shaft 48A (top portion) to which the cam drive link 48 is connected. α) indicates that the push rod 42 and the cam drive link 48 are moved to the right in the drawing based on the fact that the cylinder rod protrudes from the retracted position to the protruding position (moves to the right in the drawing) in response to the activation of the electric cylinder 18. However, as the push link 42 and the cam drive link 48 move to the right in the drawing, the swing cam 46 is surely connected to the retracting / pushing link connected via the support shaft 50B. 50 is pulled in and moved to the right in the drawing, and the guide link 44 connected via the support shaft 40C is also moved to the right in the drawing, and finally, the drawing / push-out link 5 is moved. The connecting portion 22b of the drive arm 22 to which both the 0 and the guide link 40 are connected is driven to be pulled rightward in the drawing, and the tilting H to which the drive arm 22 is connected is driven to rotate from the closed position to the open position. become.

  On the other hand, the support shaft 40C (vertex γ) to which the push link 42 is connected and the support shaft 48A (top portion α) to which the cam drive link 48 is connected cause the cylinder rod to move from the protruding position in response to the activation of the electric cylinder 18. The push link 42 and the cam drive link 48 move to the left in the drawing based on the drawing (moving to the left in the drawing) to the drawing position. In accordance with the movement to the left in the figure, the swing cam 46 reliably moves the pulling / push-out link 50 connected via the support shaft 50B to the left in the drawing and is connected via the support shaft 40C. The driven guide link 44 is also pushed out to the left in the drawing, and finally the connecting portion of the drive arm 22 in which the pull-in / push-out link 50 and the guide link 40 are connected together. 22b is pushed out to the left in the drawing, and the tilt H to which the drive arm 22 is connected is driven to rotate from the open position to the closed position.

  As described in detail above, in this embodiment, the member directly connected to the tilting H in order to open / close the tilting H is only one driving arm 22, and an electric cylinder as a driving source. Only one cylinder rod 20 that is advanced and retracted at 18 is also provided. Here, the link mechanism for temporarily converting the forward / backward drive of the single cylinder rod 20 into the swing drive and then transmitting it to the single drive arm 22 as the horizontal drive is a combination of a single link. It is also possible to use a structure (a combination of various types of links arranged one by one).

  However, in the present invention, a structure in which a pair of left and right links are combined and connected is adopted, and in this embodiment, the link is the central axis of the drive device 10 (the lateral direction of the loading platform D in FIG. 2). (Ie, a line that extends along the left and right direction of the drawing and passes through a center position in the width direction in the top view of the driving device 10) and a pair spaced apart at an equal distance from side to side. And a driving force generated by the forward / backward drive of one cylinder rod 20 is equally divided by a pair of left and right links, and finally one drive It transmits to arm 22 collectively, and it is constituted so that tilting H may be opened and closed. As a result, the stress borne by each link is simply halved compared to the case of a single link combination, and the strength against the stress acting at the time of driving force transmission can be sufficiently secured. become.

  In order to transmit this driving force, the first link mechanism 12 that is driven to swing by the forward / backward movement of the cylinder rod 20 of the electric cylinder 18 and the drive arm according to the swing of the first link mechanism 12 A second link mechanism 14 that moves the other end (the connecting portion 22b) of the lever 22 substantially horizontally between the pushing position corresponding to the closing position of the tilting H and the pulling position corresponding to the opening position of the tilting H. The first and second link mechanisms 12 and 14 extend along the forward / backward movement direction of the cylinder rod 20 and are arranged in a pair on the left and right sides with the central axis therebetween. A plurality of links are provided, and each includes a left and right independent link that is independently driven to swing left and right, and a left and right integrated link that is integrally connected to the left and right and is integrally driven to swing. This The one in which the features. As a result, when it is difficult to integrate the left and right links, the left and right links can be independently rotated as they are, and in the case where the left and right links can be integrated, the left and right links are connected via the connecting portion. These links were integrated to increase the structural strength and improve the overall strength.

  Further, a frame slide mechanism 34 which constitutes a second feature of the present invention will be described with reference to FIGS.

  First, as already described in [0008] in the prior art section of the present specification, the optimum mounting position of the automatic tilt opening / closing drive device differs slightly depending on the type of truck and the truck body manufacturer. The truck industry has pointed out that even if the automatic tilt opening / closing drive device provided by a person is satisfactory in function, it is difficult to adopt it if the actual mounting position on the truck cannot be mounted at the optimal position. Improvement was also requested. On the other hand, in the present invention, the frame slide mechanism 34 is newly invented so that this demand can be reliably met.

  Before describing the frame slide mechanism 34, first, the structure of the frame 16 that is the target of the frame slide mechanism 34 will be described with reference to FIGS. As shown in FIG. 15, the frame 16 is connected to the front of the pair of left and right side hills 16 a; 16 b and both side hills 16 a; 16 b as well as the front end surface thereof. It is integrally formed from a front mounting plate 16c that is attached in close contact with the inner surface of the base frame F of the track A, and a top plate 16d that covers the upper surface of the space surrounded by the both sides 16a; 16b and the front mounting plate 16c. Has been. The frame slide mechanism 34 described above is for allowing the frame 16 to slide in the lateral direction while being interposed between the frame 16 and the base frame F. Arranged on the mounting plate 16c.

  Here, as shown in FIG. 17, the above-described electric cylinder mounting mechanism 32 is disposed on the front lower surface of the frame 16. Since this electric cylinder mounting mechanism 32 has already been described with reference to FIG. 4, it will be described that the mounting plate 32 c shown in FIG. 4 is fixed to the front portion of the lower surface of the top plate 16 d of the frame 16. Thus, further explanation is omitted.

  The frame slide mechanism 34 is formed in a state of penetrating through the front mounting plate 16c of the frame 16 in the thickness direction as shown in FIG. And a pair of slides extending along the upper and lower side edges of the long groove 34a (that is, along the lateral direction) as shown in FIG. A guide member 34b; 34c, a slide plate 34d supported by the slide guide members 34b; 34c so as to be slidable in the lateral direction, and disposed so as to partially cover the long groove 34a, and a long groove in the slide plate 34d It comprises at least two fixing nuts 34e; 34f fixed in a state facing the surface 34a.

  On the other hand, as shown in FIG. 19, the frame F is formed with at least two mounting holes Fb that are in communication with the above-described long groove 34a and spaced apart in the lateral direction. In the fixing nut 34e; 34f, the bolt portion 35b of the fixing bolt 35 inserted from the outside through the mounting hole Fb formed in the frame F is inserted in the long groove 34a. Screw together. As a result, the frame 16 can be slid along the horizontal direction on the underframe F. Therefore, the frame 16 is attached with its position adjusted, and the head 35a of the fixing bolt 35 is clamped and rotated to be fixed. By tightening the nuts 34e; 34f, the frame 16 is fixed to the frame F between them.

  Thus, according to the second feature of the present invention, the bolt portion 35b of the fixing bolt 35 inserted from the outside through the mounting hole Fa formed in the frame F passes through the long groove 34a. By screwing into the fixing nut 34e; 34f in the state, the frame 16 is attached to the base frame F with its position adjusted along the lateral direction, and the fixing bolt 35 is attached to the fixing nut 34e; By tightening against 34f, the frame 16 is fixed to the frame F between the two, so that it is possible to reliably cope with the difference in the optimum mounting position of different devices depending on the track, easily and reliably. The effect which becomes possible to attach to a truck is produced.

  Next, the drive arm attaching / detaching mechanism 26 constituting the third feature of the present invention will be described with reference to FIGS.

  First, as already described in [0009] in the prior art section of the present specification, when mounting an automatic tilt opening / closing drive device, if the mounting operation to the truck body becomes complicated, the mounting man-hours increase and useless costs increase. From this point of view, there has been a demand from an assembly site, a repair shop, and the like for easy and reliable mounting of the device to the track body. On the other hand, in the present invention, the drive arm attaching / detaching mechanism 26 is newly invented so that this demand can be reliably met.

  Specifically, FIG. 20 shows a state in which the driving arm 22 connects the tilting H and the second link mechanism 14, but in this embodiment, the track A of the driving device 10 is shown. In the assembly work step, as shown in FIG. 21, first, the structure excluding the drive arm 22 is attached to the frame F of the track A. As a feature of this embodiment, as shown in FIG. The drive arm 22 is separated in advance into the arm main body 22a and the connecting portion 22b, and the guide link 44 and the pull-in / push-out link 50 of the second link mechanism 14 are attached to the connecting portion 22b.

  After this attachment operation is completed, the operation of connecting the arm main body 22a of the drive arm 22 is started. First, the lower end of the arm main body 22a is connected via the first screw 26b constituting the drive arm attaching / detaching mechanism 26. Then, the bearing member 26a constituting the drive arm attaching / detaching mechanism 26 is superposed on the support shaft 22A provided at the upper end of the arm main body 22a of the drive arm 22 and fixedly attached thereto. Temporarily fix to the mounting surface. In this temporarily fixed state, a screw hole Ha (shown in FIG. 21) is tapped on the tilt hole H through a screw insertion hole 26c formed in a state of penetrating the bearing member 26a in the thickness direction. Thereafter, the second screw 26d is screwed into the screw hole Ha of the tilt H through the screw insertion hole 26c, and the bearing member 26A is fixed to the tilt H. In this way, as shown in FIG. 15, the drive arm 22 can be fixedly attached to the tilting H.

  Thus, since the drive arm attaching / detaching mechanism 26 constituting the third feature of the present invention is configured, the screw hole Ha is formed in the tilt hole H in advance when the drive device 10 is attached to the frame F of the track A. Rather than tapping, after the drive device 10 is attached to the frame F of the track A and after the lower end of the arm body 22a of the drive arm 22 is attached to the connecting portion 22b, the support of the arm body 22a is supported. The bearing member 26a is put on the shaft 22A, and the screw hole Ha is tapped on the tilting H in a state where the bearing member 26 is temporarily fixed to the tilting H. As a result, in a situation where there are various height positions of the frame F depending on the manufacturer of the truck A and the vehicle type, even if there are various positions for attaching the bearing member 26a to the tilting H, the bearing member is not limited to this. The screw hole Ha corresponding to the screw insertion hole 26c of 26a can be formed in the tilt H afterwards, and therefore the drive device 10 including the drive arm 22 can be tracked regardless of the manufacturer of the track A and apologize. It can be easily and securely attached to A.

  Next, with reference to FIG. 22, a control system for driving and controlling the driving apparatus 10 will be described. The control system includes a control device 62 built in the controller 60. The control device 62 includes a power switch 64, a power source 66, a selector 68, a tilt H open / close switch 70, and a drive button 72. Is connected. Here, the power switch 64, the selector 68, the changeover switch 70, and the drive button 72 are attached to the surface of the housing constituting the controller 60.

  Although not shown in detail, the selector 68 includes a dial-type switch so that only one of the first to fourth electric cylinders 18A to 18D can be selected. ing. Further, the control device 62 selectively drives and controls the electric cylinder 18 selected by the selector 68 in the opening direction or closing direction of the tilt H switched by the changeover switch 70 only while the drive button 72 is pushed. Thus, the corresponding tilt H can be driven to open and close.

  On the surface of the housing, a power supply for intermittently connecting the power supply 66 is displayed together with a liquid crystal display 74 indicating the selected tilt H and a setting state such as which of the opening / closing operation directions is switched. A power lamp 76 for displaying the ON / OFF state of the switch 64 by turning on / off is further attached.

  On the other hand, in this embodiment, the controller 60 is configured as a wireless type controller. That is, the control signal output from the control device 62 is configured to be transmitted as a radio signal by the transmission device 78. Moreover, each electric cylinder 18 is provided with receiving devices 80A to 80D, respectively, receives and recognizes a control signal transmitted from the transmitting device 78, and if it is identified that it is a control signal to itself, The drive signals are output to the corresponding electric cylinders 18A to 18D via the drivers 82A to 82D.

  Since the control system including the control device 62 is configured in this way, when the operator tries to open / close the tilting H for loading / unloading, first, the wing J shown in FIG. The upper part of the loading platform D is opened. Thereby, the state where the upper end of the tilt H is covered and the opening operation of the tilt H is prohibited is released, and the tilt H can be rotated from the closed position toward the open position. From this state, the power switch 64 of the controller 60 is turned on (turned on), and then the electric cylinder 18 to be opened and closed by the selector 68 is selected. Whether the tilt H is to be opened or closed is set by the changeover switch 70, and after confirming the safety of the surroundings, the drive button 72 is pushed in. The driving cylinder 18 selected by the selector 68 is in the state shown in FIGS. 2 and 3 when the opening operation is set by the changeover switch 70 while the driving button 72 is pushed. On the other hand, when the closing operation is set by the changeover switch 70, the piston rod 20 is retracted from the protruding position shown in FIGS.

  In the drive device 10 configured as described above, the opening / closing operation of the tilt H will be specifically described below.

  First, as shown in FIGS. 2 and 3, the cylinder rod 20 of the electric cylinder 18 is held in the most retracted state in a state where the tilt H is in a vertically closed position. In this way, when the cylinder rod 20 is most retracted, the drive arm 22 is moved to the pushing position at the left end in the figure through the first and second link mechanisms 12 and 14 connected thereto. Be biased.

  From the state in which the tilting H is in the closed position, in order to take out the load on the loading platform or to load the loading on the loading platform, as shown in FIGS. In the case of rotation, the operator turns on the power switch 64 using the wireless controller 60, thereby transmitting an activation signal to the receiving circuit built in the control device 62 of the driving device 10. When the receiving signal is received by the receiving circuit, the control procedure of a control circuit (not shown) is started, the electric motor 18a is started, the electric cylinder 18 is operated, and the cylinder rod 20 is retracted from the retracted position to the right in the drawing. To drive.

  Due to the protrusion of the cylinder rod 20, the power link 30 of the first link mechanism 12 is rotated around the support shaft 30A in the counterclockwise direction. By this rotation, the first swing link 24 on which the power link 30 is pivotally supported is rotated in the counterclockwise direction around the spindle 24A. The rolling link 40 connected to the lower end of the first swing link 24 via the push link 42 is such that the connecting point is a support shaft 40C, and is regulated so as to move horizontally at a so-called “Chebyshev link”. Because of this structure, the guide link 44 connected to the support shaft 40C is biased to the right in the drawing.

  On the other hand, the cam drive arm 48 in which the lower end of the power link 30 is connected via the connection link 28 is also biased to the right in the drawing as the power link 30 rotates counterclockwise. The coupled swing cam 46 is swung in the counterclockwise direction around the support shaft 40C. As the swing cam 46 turns, the drive arm 22 connected to the lower end of the swing cam 46 via the pull-in / push-out link 50 is pulled toward the right in the drawing.

  In the first link mechanism 12, the second and third swing links 36 and 38 are also counterclockwise in accordance with the rightward deflection of the support shaft 40 </ b> C in response to the activation of the electric cylinder 18. Will swing along. Here, the swinging of both the links 36 and 38 in the counterclockwise direction rotates the rolling link 40 to which the lower support shafts 40A and 40B are attached around the support shaft 40C. As a result, The lower end of the drive arm 22 is pulled in the direction from the pushing position toward the pulling position. As a result, the tilting H passes through a position rotated about 45 degrees from the closed position as shown in FIGS. 6 and 7 when the driving arm 22 is pulled and moved in the direction from the pushing position toward the pulling position. As shown in FIG. 8 and FIG. 9, it is rotated about 90 degrees from the closed position, just passes through the horizontal state, and passes through the position rotated about 135 degrees from the closed position as shown in FIG. 10 and FIG. Eventually, as shown in FIGS. 11-13, it will result in an open position rotated approximately 175 degrees from the closed position.

  The meaning of providing a so-called “Chebyshev link” in the second link mechanism 14 will be described again. The second and third swing links 36 and 38 and the rolling link 40 constituting the so-called “Chebyshev link” are similarly driven to swing according to the swing of the first link mechanism 12. However, the middle point (that is, the support shaft 40C) of the rolling link 40, which is a feature of the so-called “Chebyshev link”, is regulated so as to move in a substantially horizontal direction. Utilizing this so-called “Chebyshev link”, in order to convert the swing in the first link mechanism 12 into a substantially horizontal movement and transmit it to the drive arm 22, The lower support shaft 24B of the first swing link 24 is connected to the support shaft 40C via the push link 42, and the lower support shaft 28A of the power link 30 is connected via the cam drive arm 48. The swing cam 46 is connected to a support shaft 48A provided at the apex α.

  As a result, the swing of the first swing link 24 of the first link mechanism 12 is transmitted as a force along the substantially horizontal direction to the guide link 44 via the push link 42. Thus, the drive arm 22 is moved from the push-out position toward the right drawing position in the drawing.

  On the other hand, the swing of the power link 30 of the first link mechanism 12 is transmitted to the swing cam 46 via the cam drive arm 48 as a turning force around the support shaft 40C. Here, as another feature of the present invention, even if the above-described guide link 44 is simply reciprocated along the horizontal direction, the drive arm 22 connected to the guide link 44 is in the push-out position and the retracted position. Will not move smoothly between the two. Therefore, the state of swinging around the support shaft 40C is “converted” so that the swing of the first link mechanism 12 can be smoothly moved between the push-out position and the retracted position. Thus, a swing cam 46 is provided so that it can finally be transmitted to the drive arm 22 via the pull-in / push-out link 50.

  The second swing link 36 is attached to the lower end of the rolling link 40 in order to sway the swing cam 46 so as to define the appropriate force distribution and direction of the force to move the drive arm 22. Attached to the first top α of the swing cam 46 via the second auxiliary link 52 and the cam drive link 48 which are connected to the support shaft 40A and connected to the intermediate portion via the support shaft 54A. Connected to the support shaft 48A. In this way, the rotation of the second swing link 36 around the support shaft 36A is transmitted as a swing force around the support shaft 40C of the swing cam 46 by the cam drive arm 48 via the second auxiliary link 54. Is done.

  On the other hand, the second apex β of the swing cam 46 is connected to the right end of the push / pull-in link 50 in the drawing, and to the midpoint of the rolling link 40 connected to the third swing link 38. Since the attached support shaft 40C is also connected to the intermediate portion of the guide link 44, it is reliably transmitted to the lower end of the drive arm 22 via the push-out / retraction link 50, and cooperates with the guide link 44 described above. Thus, the drive arm 22 can be reciprocated smoothly and reliably between the push-out position and the retracted position.

  That is, when the electric cylinder 18 causes the cylinder rod 20 to protrude, the tilting H is moved from the closed position shown in FIGS. 2 and 3 to the right in the drawing from the pushing position. Further, by this movement, it is driven to rotate around the hinge G in the counterclockwise direction, and is brought to the horizontal position shown in FIGS. 8 and 9 through the 45-degree rotational position shown in FIGS. Become. When the drive arm 22 is moved so far, the support shaft 40 </ b> C is regulated to move in a substantially horizontal direction, so that the lower end of the drive arm 22 is pulled inward below the frame 16. As a result, the movement area of the drive device 10 as a whole falls within the range defined by the movement locus of the lower end of the swing cam 46 in the height direction.

  Here, as shown in FIGS. 8 and 9, the lower end of the swing cam 46 takes the lowest position in the state where the tilt H is rotated to the horizontal state, which is specifically a position 140 mm from the lower end of the frame 16. Therefore, this defines the lowest position of the moving area of the drive device 10 as a whole. For example, when the drive device 10 is mounted on a 25 t track, there is a free space of 150 mm immediately below the frame 16, so that a moving area of the drive device 10 can be secured, that is, the drive device 10 is mounted on the track A. It becomes possible to install under the loading platform D without any problem.

  In the state shown in FIGS. 8 and 9, that is, in the state where the tilt H is rotated to the horizontal position, the lower end of the swing cam 46 becomes a vertically lower position, in other words, a bottom dead center. In this swinging, the moving region does not shift further downward.

  Further, when the electric cylinder 18 further protrudes the cylinder rod 20 and further swings the first link mechanism 12 along the counterclockwise direction, the support shaft 40C is further moved rightward in the drawing, Accordingly, the lower end of the drive arm 22 is further moved toward the retracted position through a state where the lower end of the tilting H shown in FIGS. 10 and 11 is rotated about 135 degrees. Then, with the electric cylinder 18 projecting the cylinder rod 20 to the maximum, the drive arm 22 is brought into the retracted position, as shown in FIGS. Will be biased.

  On the other hand, when the electric cylinder 18 gradually pulls the cylinder rod from the most protruded state shown in FIGS. 12 to 14, a completely opposite operation is performed reversibly. In the first link mechanism 12, The first swing link 24 is swung in the clockwise direction. In response to this, in the second link mechanism 14, the support shaft 40C is moved to the left in the drawing, and accordingly, the retracting / pushing link is moved. 50 and the guide link 44 cooperate with each other to move the lower end of the drive arm 22 from the retracted position toward the pushing position, and through the horizontal state of the tilt H shown in FIGS. 8 and 9, FIG. It will be rotated to the closed position shown in FIG.

  Needless to say, the present invention is not limited to the above-described configuration and numerical values, and various modifications and changes can be made without departing from the scope of the present invention.

  For example, in the above-described embodiment, the case where the present invention is applied to the track A having four tilts H has been described. However, the present invention is not limited to such a configuration, and for example, two tilts H are provided. Needless to say, the present invention can also be applied to a track equipped with six Aori H.

  Further, although the description has been made so that the wing type body is targeted as a truck bed to which the present invention is applied, the present invention is not limited to such an application, and includes, for example, a flat body type. Needless to say, it can be applied to any type of loading platform.

  Moreover, although 140 mm was illustrated and demonstrated as a value of the height direction of the movement area | region where this invention is achieved, this is literally an illustration and it cannot be overemphasized that it is limited to the numerical value at all.

  In the above-described embodiments, the controller 60 has been described as a wireless type. However, the present invention is not limited to such a configuration, and it goes without saying that the controller 60 can be used as a wired type controller 60 connected by a wire. .

  Further, in the above-described embodiment, a so-called “Chebyshev link” is used as a configuration in which the support shaft 40C in the second link mechanism 14 is moved in the horizontal direction in accordance with the swinging operation in the first link mechanism 12. However, the present invention is not limited to such a configuration. For example, a so-called “Chebyshev link” is used, for example, by using a guide rail that restricts the support shaft 40C to move only along the horizontal direction. Needless to say, anything can be used as long as it can be regulated so that the support shaft 40C can be moved horizontally without using "."

Industrial availability

  As described above, by using the driving device 10 of this embodiment, the tilting H can be operated between the closed position where the cargo compartment is closed and the open position where it is completely opened without any help from the operator. Therefore, the opening and closing drive is performed fully automatically, and the workability of the worker is greatly improved. Moreover, since the lower end of the moving area in the drive device 10 is defined at the lowest position of the lower end of the swing cam 46, for example, in an empty space existing below the cargo compartment in a large size such as a 25 t truck. In addition, the drive device 10 can be mounted using this empty space, and the effect can be widely used.

A Truck B Truck body C Tire D Loading platform E Floor F Underframe Fa Screw hole Fb Mounting insertion hole G Hinge H Aori Ha Screw hole I Column J Wing K Frame mounting stay 10 Ari opening / closing drive device 12 First link mechanism 14 First 2 link mechanism 16 Frame 16a; 16b Side plate 16c Front mounting plate 16d Top plate 18 Electric cylinder 18A Support shaft 18a Electric motor 18b Drive cylinder 18c Power transmission unit 20 Cylinder rod (single unit)
20A Support shaft 20B Mounting bracket 22 Drive arm (single unit)
22A Support shaft 22a Arm body 22b Connecting portion 22c Support shaft 22d Screw hole 22e Screw hole 24 First swing link (right and left integrated)
24A; 24B Support shaft 24a One link main body 24b The other link main body 24c Connecting portion 26 Drive arm attaching / detaching mechanism 26a Bearing member 26b First screw 26c Second screw 26d Screw insertion hole 28 Connecting link (left and right integrated)
28A; 28B Support shaft 28a One link main body 28b The other link main body 28c Connection part 30 Power link (left-right integrated)
30A Support shaft 30A Support shaft 30a One link main body 30b The other link main body 30c Connection portion 32 Electric cylinder mounting mechanism 32a; 32b Support stay 32c Mounting plate 32d; 32e Shaft support hole 34 Frame slide mechanism 34a Long groove 34b; 34c Slide guide member 34d Slide plate 34e; 34f Fixing nut 35 Mounting bolt 35a Head 35b Bolt portion 36 Second swing link (left and right independent)
36A Support shaft 38 Third swing link (left and right independent)
38A Spindle 40 Rolling link (left and right independent)
40A; 40B; 40C Support shaft 42 Push link (left and right independent)
44 Guide link (left and right independent)
44A; 44B Support shaft 46 Swing cam (left and right integrated)
46a One cam plate 46b The other cam plate 46c Connection part 48 Cam drive link (left-right integrated)
48A Support shaft 48a One link main body 48b The other link main body 48c Connection part 50 Pull-in / push-out link (right and left integrated)
50A; 50B Support shaft 50a One link main body 50b The other link main body 50c Connection part 52 1st auxiliary link (2nd auxiliary connection link) (right-and-left independent)
52A Support shaft 54 Second auxiliary link (first auxiliary connecting link) (left and right independent)
54A; 54B Support shaft 56 Reinforcement link (left and right independent)
60 controller 62 control device 64 power switch 66 power supply 68 selector 70 selector switch 72 drive button 74 liquid crystal display 76 power lamp 78 transmitters 80A to 80D receiving devices 82A to 82D corresponding to the respective electric cylinders 18A to 18D respective electric cylinders 18A to 18D The first top portion β of the swing cam 46 corresponding to the second top portion γ of the swing cam 46 The third top portion of the swing cam 46

Claims (16)

Automatic tilt opening and closing drive for opening and closing the tilt mounted to open and close between the closed position standing on the floor frame of the cargo bed and the open position depending on the floor of the loading platform to constitute the side of the loading platform of the truck body In the device
A frame integrally fixed to the underframe;
One drive arm having one end rotatably attached to the lower part of the outer surface of the tilt and the other end extending to the lower side of the frame;
An electric cylinder attached to the frame and provided with a cylinder rod so as to freely advance and retract;
A first link mechanism attached to the frame and driven to swing as a whole by the forward and backward movement of the cylinder rod;
The other end of the drive arm and the first link mechanism are attached to the frame and the other end of the drive arm is closed by the tilt according to the swing of the first link mechanism. Moves in a substantially horizontal direction between the push-out position located directly below the tilt in the position and the pull-in position retracted to the lower inside of the loading platform with the tilt in the open position. A second link mechanism
Control means for driving and controlling the electric cylinder;
Comprising
Each of the first link mechanism and the second link mechanism includes a plurality of links that extend along the advancing / retreating movement direction of the cylinder rod and that are arranged in a pair of left and right sides with a central axis interposed therebetween, An automatic tilt opening and closing mechanism comprising a left and right independent link that is independently driven to swing left and right, and a left and right integrated link that is integrally connected to the left and right and that is integrally driven to swing. Drive device. The electric cylinder is swingably attached to the frame within a vertical plane, and is disposed so as to be positioned between the left and right independent links constituting the second link mechanism,
2. The automatic tilt opening / closing drive device according to claim 1, wherein a tip end of the cylinder rod is rotatably connected to a central portion of one of the left and right integrated links constituting the first link mechanism.   In the first link, the pair of left and right links positioned on the side of the electric cylinder is configured as a left and right independent link, and the pair of left and right links positioned below the electric cylinder is configured as a left and right integrated link. The automatic tilt opening / closing drive device according to claim 2, wherein   The automatic electric cylinder according to claim 1, wherein the electric cylinder is attached to the frame so as to be swingable in a vertical plane at a base end opposite to the side on which the cylinder rod is provided. Aori opening and closing drive. The track has a plurality of tilts,
A plurality of automatic tilt opening / closing drive devices are provided per truck,
The automatic tilt opening / closing drive device according to claim 1, wherein the control means is configured to control each automatic tilt opening / closing drive device independently. The first link mechanism includes:
A pair of left and right integrated first swing links whose upper ends are swingably attached to the frame;
A power link pivotally attached to a tip of the cylinder rod at an intermediate portion, and is pivotally connected to an upper portion of the first swing link, respectively, to drive the driving force of the electric cylinder. A pair of left and right integrated power links that are transmitted to one swing link and swing-drive the first swing link;
A pair of left and right integrated connecting links that are pivotally attached at one end to the lower end of each power link and transmit the driving force from the electric cylinder to the second link mechanism;
The first link is pivotally attached to the lower end of each first swing link at one end so as to be independent of the left and right, and is driven from the electric cylinder to the second link mechanism in a state of cooperating with the connection link. A pair of left and right push links that transmit force,
The automatic tilt opening / closing drive device according to claim 2, further comprising: The second link mechanism is
In the inner position where the cylinder rod of the electric cylinder is most retracted, the other end of the drive arm is pushed out to the push-out position to hold the tilt in the closed position,
In response to the protrusion of the cylinder rod, the other end of the drive arm is drawn from the pushing position toward the lower inner side of the floor along a substantially horizontal direction,
At the projecting position where the cylinder rod protrudes most, the other end of the drive arm is retracted to the innermost retracted position of the floor to hold the tilt in the open position,
In response to the pulling-in of the cylinder rod from the protruding position, the other end of the drive arm is moved outward in the substantially horizontal direction to the push-out position, and the tilt is rotated to the closed position. The automatic tilt opening / closing drive device according to claim 6, which is configured as described above. The second link mechanism is
A pair of left and right second swing links attached to the left and right side surfaces of the frame so as to be swingable independently from each other, and a state in which each upper end is biased inward by a predetermined distance from the second swing link And a pair of left and right third swing links, each having an upper end swingably attached to the left and right side surfaces of the frame in a state where the left and right sides are independent from each other, and each of the second and third swing links. A pair of left and right Chebyshev links each composed of a pair of left and right rolling links that are pivotally attached to the lower ends of each,
A pair of left and right swing cams formed with first to third tops;
A pair of left and right cam drive links each having a first top portion of the swing cam pivotally attached to one end and each other end of the connection link pivotally attached to an intermediate portion;
A pair of left and right first auxiliary connecting links in which the other end of each of the cam drive links and the middle part of each of the second swing links are rotatably attached to both ends;
A pair of left / right pull-in / push-out links each having a second top portion of the swing cam and a lower end of each of the drive arms rotatably attached to both ends;
A pair of left and right guide links each having a lower end of each of the drive arms at one end and a middle point of each of the rolling links and a third top of each of the swing cams at the middle, respectively, rotatably attached to each other; ,
A pair of left and right second auxiliary connecting links in which the other end of each of the guide links and the middle part of each of the third swing links are rotatably attached to both ends;
The automatic tilt opening / closing drive device according to claim 7, comprising: The second swing link, the third swing link, the rolling link, the guide link, the first and second auxiliary connection links are each configured as a left and right independent link,
9. The automatic tilt opening / closing drive device according to claim 8, wherein the swing cam, the cam drive link, and the pull-in / push-out link are configured as a left-right integrated link. Each push link connects the middle point of the rolling link of the second link mechanism and the lower end of the first swing link of the first link mechanism so as to be rotatable at both ends, respectively.
A third top portion of the swing cam of the second link mechanism is rotatably connected to the midpoint of the rolling link together with one end of the push link,
In response to the swing of the first swing link of the first link mechanism due to the advancement and retraction of the cylinder rod of the electric cylinder, the middle point of the rolling link to which the push link is connected is substantially along the horizontal direction. The drive arm, which is reciprocated and connected to the guide link and the pull-in / push-out link, is reciprocated between the push-out position and the pull-in position, and the tilt is reciprocated between the closed position and the open position. 10. The automatic tilt opening / closing drive device according to claim 9, wherein the automatic tilt opening / closing drive device is moved.   11. The lowest position (bottom dead center) along the vertical direction of the moving area of the first and second link mechanisms is defined as the lowest position in the moving area of the lower end of the swing cam. The automatic tilt opening / closing drive device described in 1. Automatic tilt opening and closing drive for opening and closing the tilt mounted to open and close between the closed position standing on the floor frame of the cargo bed and the open position depending on the floor of the loading platform to constitute the side of the loading platform of the truck body In the device
A frame integrally fixed to the underframe;
A drive arm having one end rotatably attached to a lower portion of the outer surface of the tilt and the other end extending to the lower side of the frame;
An electric cylinder attached to the frame and provided with a cylinder rod so as to freely advance and retract;
A first link mechanism attached to the frame and driven to swing as a whole by the forward and backward movement of the cylinder rod;
The other end of the drive arm and the first link mechanism are attached to the frame and the other end of the drive arm is closed by the tilt according to the swing of the first link mechanism. Moves in a substantially horizontal direction between the push-out position located directly below the tilt in the position and the pull-in position retracted to the lower inside of the loading platform with the tilt in the open position. A second link mechanism
Control means for driving and controlling the electric cylinder;
Comprising
The frame is attached in a state in which its front end surface is in close contact with the inner surface of the track frame,
An automatic tilt opening / closing drive device characterized in that a frame slide means is provided between the frame and the frame to allow the frame to slide laterally. The frame slide means is formed in a state penetrating in the thickness direction on the front end surface of the frame, and is disposed so as to cover at least one long groove extending along the lateral direction of the front end surface. A slide plate slidably provided along the lateral direction, and at least two fixing nuts fixed to the slide plate so as to face the long groove,
The underframe is formed with at least two mounting holes arranged in a state communicating with the long groove and separated along the lateral direction,
A bolt portion of a fixing bolt that is inserted from the outside through the mounting hole formed in the underframe is screwed into the fixing nut while being inserted through the long groove. Is attached to the underframe with its position adjusted in the lateral direction, and by tightening the fixing bolt against the fixing nut, the frame is attached to the underframe between the two. The automatic tilt opening / closing drive device according to claim 12, wherein the automatic tilt opening / closing drive device is fixed. Automatic tilt opening and closing drive for opening and closing the tilt mounted to open and close between the closed position standing on the floor frame of the cargo bed and the open position depending on the floor of the loading platform to constitute the side of the loading platform of the truck body In the device
A frame integrally fixed to the underframe D;
A drive arm having one end rotatably attached to a lower portion of the outer surface of the tilt and the other end extending to the lower side of the frame;
An electric cylinder attached to the frame and provided with a cylinder rod so as to freely advance and retract;
A first link mechanism attached to the frame and driven to swing as a whole by the forward and backward movement of the cylinder rod;
The other end of the drive arm and the first link mechanism are attached to the frame and the other end of the drive arm is closed by the tilt according to the swing of the first link mechanism. Moves in a substantially horizontal direction between the push-out position located directly below the tilt in the position and the pull-in position retracted to the lower inside of the loading platform with the tilt in the open position. A second link mechanism
Control means for driving and controlling the electric cylinder;
Comprising
The automatic tilting opening and closing drive device, wherein the driving arm is fixedly attached so as to connect the tilting and the second link mechanism to each other via a driving arm attaching / detaching means. The drive arm includes an arm main body and a connecting portion that is detachably attached to a lower portion of the arm main body and is connected to the second link mechanism in a state where the second main link mechanism and the second link mechanism are separated from each other.
The drive arm attaching / detaching means includes a plurality of first screws for detachably attaching the lower end of the arm body to the connecting portion,
15. The automatic tilting opening and closing according to claim 14, wherein a lower portion of the arm body is fixedly attached to the connecting portion to which the second link mechanism is connected via the plurality of first screws. Drive device. The drive arm attaching / detaching means includes a bearing member for detachably attaching a support shaft attached to an upper end of the arm body to the tilt, a second screw for fixing the bearing member to the tilt, A screw insertion hole formed in the bearing member,
In a state where the lower part of the arm body is fixedly attached to the connecting portion, and the upper part of the arm body temporarily fixes the bearing member provided to cover the support shaft to the tilt. A screw hole into which the second screw is screwed into the tilt is formed by tapping through a screw insertion hole formed in the bearing member, and the temporarily fixed bearing member is attached to the second screw. 16. The drive arm is attached in a state where the tilt and the second link mechanism are connected to each other by being fixedly screwed into the screw hole through a screw insertion hole. Automatic tilt opening and closing drive device.

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