JP2017087908A - Awning bow frame device for load carrying platform - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an awning bow technique for load carrying platform capable of improving carrying-in and carrying-out operation performance of load by simply folding awning set on the load carrying platform from the rear end in the order.SOLUTION: An awning bow frame device 1 for load carrying platform has a portal frame group 2 composed of a plurality of portal frames 20, a lower end of a link 30 falling to the rear side is pivotally fitted to the lower side of a front pillar part 21, of the portal frame group 2 front rear portal frames 20, 20, the upper end of the same link 30 falling to the rear side is pivotally fitted to the upper side of the rear pillar part 21 via a lower slide piece 5, further, a lower end of a link 31 falling to the front side is pivotally fitted to the lower side of a rear pillar part 21, of the portal frame group 2 front rear portal frame 20, 20, an upper end of the same link 31 falling to the front side is pivotally fitted to an upper position than the lower slide piece 5 of the front pillar part 21 via the upper slide piece 6, a connection shaft 32 is provided at an intersection of the link 30 falling to the rear side and the link 31 falling to the front side and, thereby, an autonomous expansion mechanism 3 composed of the link 30 falling to the rear side and the link 31 falling to the front side which are intersected in an X-letter shape is provided.SELECTED DRAWING: Figure 1

Description

    The present invention relates to a skeletal frame technology that makes it possible to install a hood on a loading platform of a vehicle or the like, and in particular, a tension frame that can adjust the installation range of the hood as needed and can be folded and stored. From the field of providing and selling equipment and equipment necessary for transportation, storage, assembly and installation as well as the field of manufacturing and providing equipment, materials necessary for those materials, machinery and parts, For example, the field of providing wood, stone, various fibers, plastics, various metal materials, etc., the field of electronic components incorporated in them, the control-related equipment that integrates them, the field of various measuring instruments, the equipment, the equipment Fields generally referred to as industrial machinery, such as the field of power machinery, the electric power used as energy, the energy source, and the field of oil, as well as the equipment and instruments Research, fields related to display, sales, import / export, generals, and results of their use, and the collection and transportation of garbage debris generated by the operation of facilities and equipment There are not many technical fields that are not related to the fields, such as the recycling field that efficiently recycles garbage waste, and new fields that cannot be envisaged at this time.

(Points of interest)
Light trucks, especially light trucks, are work vehicles indispensable for agriculture in Japan. For example, when harvesting crops, green vegetables loaded on the cargo bed are protected from rain, snow and dust during transportation. In order to protect rice and rice husks from wind, snow, and dust during transportation, and to prevent scattering to the surroundings, a pipe-house type hood that covers the whole in a tunnel shape so that it fits inside the carrier is used. If you install these pipe-house type hoods so that they are fixed on the loading platform, you will need to put in and out the load from the side of the loading platform, or place a large one that exceeds the height of the hood. When it had to be, it left the difficulty of causing inconvenience.

(Conventional technology)
Proposals that reflect this situation and serve as a breakthrough are not unheard of.
For example, as represented by the following proposed in Patent Document 1 (1), the gate type developed by the applicant of the present application and detachably fixed to the front frame of a small truck bed by a connector. It consists of a fixed frame and a movable gate frame that has the same shape as or similar to the fixed gate frame, and has casters attached to the lower ends of the column-corresponding parts. The movable frames are set up in parallel with each other, and these frames are connected to each other by a connecting link so that the interlocked parallel movement is possible. On the other hand, when a large number of gate-type movable frames can be moved in parallel in an interlocking manner to protect the cargo bed from rainwater, it is the same as a fixed hood by expanding it fully to the rear. When a hood is not required, a large number of gate-type movable frames can be folded so as to approach the gate-type fixed frame, or a truck bed as shown in Patent Document 1 (2). A storage section that can be mounted and can store rice husks is provided, and a vertical hook section that can stand in parallel on both the left and right sides of the truck bed and an upper position of the load bed is provided between the left and right vertical hook sections. A plurality of frame housings composed of horizontal ribs, and an X-shaped link disposed between adjacent vertical rods of the plurality of parallel frame housings, wherein a pair of link rods are pivotally connected by a central pivot. Each frame case can be moved close to and away from each other, and when not in use such as during storage, each frame case can be moved close to and folded, and corresponds to the length size of the loading platform. Of the rice husk left on the bed When starting out, it is possible to scrape the frame body in the state where the loading platform is exposed to the outside by moving each frame case close together, so that the workability can be improved and the convenience of use can be improved and the rice husk is stored. In some cases, rice husk containers and the like that can be satisfactorily stored in the section.

    However, the movable hood skeleton for a small truck carrier as shown in the former Patent Document 1 (1) is arranged in the front and rear of a gate-type movable frame having a sliding tube attached to a column-corresponding portion. It is possible to fold only one portal-type movable frame because the portal-type movable frame is connected by parallel connection links, and the three portal-type movable frames are the unit for folding. In addition, the rice husk transport container represented by Patent Document 1 (2) has two upper and lower sliding cylinders on all the frame flanges adjacent to the front and rear, Crossing in the X shape between the upper and lower sliding cylinders facing each other in the front and back, pivoting the ends of the links where the crossing parts are connected by a horizontal axis, and connecting the whole across the front and rear ends by a similar link mechanism. Folding a set of X-shaped links When a whole in conjunction with this becomes a possible become folded in the same operation, for example, were those operations is impossible that folding only one frame rod portion.

Then, referring to the examples shown in FIG. 12 to FIG. 16 as having the same drawbacks, the front and rear of the plurality of front and rear portal frames 20, 20,... Arranged on the loading bed floor 70 of the light truck 7. An X-shaped link 9 is provided between the column portions 21 and 21. The X-shaped link 9 is crossed in an X shape and the crossed portions are attached to each other with a horizontal axis. The upper end of each is pivotally attached to the upper part of the column parts 21 and 21 corresponding to the front and rear, and the lower ends of the forward tilt link 90 and the rear tilt link 91 are connected to the front and rear via the slide tubes 92 and 92. There is a canopy frame 8 attached to the lower part of 21 and 21, and as shown in FIG. 13, when each X-shaped link 9 is expanded to the longitudinal length L, it can be extended to a dimension AL corresponding to the entire length of the cargo bed, As shown in FIG. 15, when the rear end of the hood frame 8 tries to fold the wrinkle, all X-shaped phosphorus 9, 9,... Interlock with each other to become the longitudinal length S, and the longitudinal length is folded to the midway advance dimension SL, and is folded into a cargo room (on the floor) surrounded by a hood (not shown). For example, when a rice husk or the like is mounted, the cargo comes into contact with each of the gate molds 20, 20,..., The pillars 21, 21, 21,. Unless the smooth operation of the links 9, 9,... Has been carried out and substantially all the cargo has been unloaded from the cargo compartment, as shown in FIGS. When using a crane, a forklift, or the like that cannot be folded, there is a fatal defect that the hood and the gate molds 20, 20,...
(1) Japanese Patent Laid-Open No. 2-102820 (2) Japanese Patent No. 4470179

(Awareness of problems)
As described above, the skeletal devices for various loading platform hoods that have been proposed so far, for example, only one of the plurality of portal-type movable frames arranged at the front and rear, for example, the one arranged at the rear end is folded alone. When the cargo is unloaded and the cargo is unloaded from the back of the loading platform, when the cargo behind the loading platform has been unloaded and the cargo ahead is to be unloaded, the gate-type movable frame placed at the rear end of the loading platform Can not be operated to expose the cargo bed floor, and for example, it is difficult to carry in and out cargo using cranes, forklifts, excavators, belt conveyors, harvesters, combines, etc. In addition, there remains a drawback that it is difficult to cope with lifting and lowering cargo from the side of the loading platform. For many years, it has been flexible to various users. He has been involved in the development and provision of various types of agricultural equipment and devices, and has already completed and provided the above-mentioned Japanese Patent Application Laid-Open No. 2-102820, etc., and various knowledge obtained from them and from users Based on the above information, in order to improve the mounting and installation work efficiency, further improving the mounting and use work function, not only from the more flexible folding function of the skeleton for the hood, but also from the manufacturing process As a result, the possibility of further improvement has been felt.

(Object of invention)
In view of this, the present invention suggests that it is not possible to develop a new skeletal technology for the loading platform hood that can easily fold the hood installed on the loading platform sequentially from the rear end thereof and improve the cargo loading and unloading workability Judging from the judgment, we quickly started development and research, and as a result of repeating trial and error over many years and many trial manufactures and experiments, this time, finally, to realize a trolley frame device for a loading platform with a new structure In the following, the configuration will be described in detail together with an embodiment representative of the present invention shown in the drawings.

(Structure of the invention)
As clearly understood from the embodiments representing the present invention shown in the drawings, the hood tension frame device of the present invention basically comprises the following configuration.
In other words, between the upper ends of the left and right pillars arranged at the left and right width ends of the loading platform floor to be installed, there is a portal frame group consisting of a plurality of portal frame frames with the beam section mounted horizontally, before and after the portal frame group. In the portal frame, the lower end of the backward link is pivotally attached below the front column, and the upper end of the backward link is slid vertically above the rear column in the front and rear portal frame of the gate frame group. It is pivotally attached via a lower slide piece that can be freely moved, and the lower end of the forward link is pivotally attached to the lower side of the rear column in the front and rear gate form frames of the gate type frame group. In the frame, the upper end of the forward link is positioned above the lower slide piece of the front pillar, and is pivotally attached via an upper slide piece that can slide up and down, and is connected to the backward link and the forward link crossing point. This is a gantry frame device for a cargo bed with a gist of a configuration in which an autonomous extension / contraction mechanism including a rearward link and a forward link that is provided with a shaft and crossed in an X shape is provided.

    In other words, between the upper ends of the left and right column portions arranged at the left and right width ends of the loading platform floor to be installed, the gate frame group consisting of a plurality of gate frame frames with the beam portion horizontally mounted, The lower end of the backward link is pivotally mounted below the front pillar in the front and rear gate form of the gate form group, and the rear link is located above the rear pillar in the front and rear gate form of the gate form group. Attached via a lower slide piece whose upper end is freely slidable, and a lower end of the forward link is pivotally attached below the rear column in the front and rear gate frame of the gate frame group. In the front and rear gate form frames of the frame group, the upper end of the forward link is mounted on the upper side of the lower slide piece of the front pillar, and the upper end of the forward link is slidable up and down. A gate form frame provided at the rearmost end of the loading platform floor with a connecting shaft at the link crossing point, an autonomous telescopic mechanism consisting of a backward link and a forward link crossed in an X shape Et al., Autonomous expansion mechanism each gantry frame one by one sequentially, may be the sole moving bed for HoroCho frame apparatus having the configuration as foldable to close the portal frame adjacent to the front.

    If it is shown as a more specific configuration, a length corresponding to the left and right width of the installation target cargo bed is provided between the left and right width ends of the installation target cargo bed between the upper ends of the left and right column portions that can be placed in an upright posture. A gate frame in which a plurality of gate-shaped frames formed by horizontally extending a beam portion is a combination of at least one of front and rear adjacent ones, the same height, and the front and rear adjacent ones different from each other. In the front and rear gate frames adjacent to the front and rear in the group of gate frames, the lower end of the rearward link is pivotally mounted around the horizontal axis at an appropriate position near the front column. A horizontal axis centered through a lower slide piece that allows the upper end of the rearward link to be slid up and down at an appropriate position above the rear column in the front and rear gate frame adjacent to the front and rear in the portal frame group. In the front and rear portal form frames that are pivotally mounted around and that are adjacent to the front and rear in the gate form group, in the rear The lower end of the forward link, which is the same length as the rearward link, is pivotally mounted around the horizontal axis at an appropriate position near the lower part of the front and rear gate frames in the front and rear gate frames adjacent to each other in the gate frame group. At the right upper position above the lower slide piece of the front pillar, the upper end of the forward link is pivotally mounted around the horizontal axis via the upper slide piece that can slide up and down. An autonomy link consisting of a backward link and a forward link crossed in an X shape by providing a connecting shaft that pivotally pivots both around the horizontal axis at the crossover point of the backward link and forward link that cross each other. A telescopic mechanism is provided, and the gate frame placed at the rearmost end of the loading platform floor to be installed can be moved and folded independently, one by one for each autonomous telescopic mechanism, close to the gate frame adjacent to the front. It becomes a trolley frame device for a cargo bed that is supposed to be.

    In other words, between the upper ends of the left and right column portions arranged at the left and right width ends of the loading platform floor to be installed, it has a gate frame group consisting of a plurality of gate frames formed by horizontally extending the beam portion, and The upper end of the reverse link is pivotally mounted in the front and rear gate form frames of the portal form group group above the rear column part, and the reverse link is provided in the front and rear gate form frames of the gate form group group and below the front column part. A lower slide piece that can be slid up and down is pivotally attached, and an upper end of the forward link is pivotally attached to the upper part of the front pillar portion in the front and rear gate form frames of the gate form frame group. In the portal frame group before and after the portal frame group, it is pivotally attached via an upper slide piece that allows the lower end of the forward link to slide up and down below the rear pillar part and above the lower slide piece. For a loading platform with a configuration in which a connecting shaft is provided at the crossover point of the backward link and the forward link and an autonomous telescopic mechanism comprising the backward link and forward link crossed in an X shape is provided. It can be said that Chowaku apparatus.

    As described above, according to the hood tension frame device of the present invention, unlike the conventional ones, the gate frame adjacent to the front and rear in the gate frame group has the unique characteristic configuration as described above. The autonomous expansion and contraction mechanism makes it possible to keep the front and rear separation distances at a predetermined interval, and by installing a hood on the loading platform floor to be installed, the loaded cargo can be protected from the external environment such as wind, snow, and snow. Each piece can be moved and folded in close proximity to the adjacent front door frame, and each gate frame is sequentially loaded while loading cargo from the deep (front) to the rear edge of the loading platform floor. The cargo can be deployed to move backwards, or the cargo can be loaded sequentially from the rear end of the loading platform floor, and the rear end is adjacent one by one from the gate formwork at the rear end as the unloading progresses. Move and fold it close to the gate formwork It is possible to effectively use heavy machinery such as cranes, forklifts, excavators, belt conveyors, conveyors, harvesters, and combine machines, agricultural machinery, etc. It is possible to respond quickly when it becomes necessary to take in and out the load from the side of the loading platform suddenly, or when a large object exceeding the height of the hood must be put on top. When unloading items such as parts, the rearmost end of the load carrier floor to be installed is moved forward one by one from the gate formwork and is folded so that the efficiency of the cargo unloading work is markedly increased. Since the top of the hood can be freely adjusted according to the cargo volume, the crosswind resistance to the hood while the freight vehicle is running can be reduced, and safer driving can be realized. Cormorants outstanding features can be exhibited.

    Between the upper ends of the left and right pillars arranged at the left and right width ends of the loading platform floor to be installed, there is a gate-type frame group consisting of a plurality of gate-type frames with the beam section mounted horizontally. In the frame, the lower end of the rearward link is pivotally mounted below the front pillar part, and the upper end of the rearward link can be slid vertically above the rear pillar part in the front and rear gate form frames of the gate type frame group. And the lower end of the forward link is pivotally mounted below the rear column in the front and rear gate frame of the gate type frame group. Centered on the upper slide piece, which allows the upper end of the forward link to slide up and down, above the lower slide piece in the middle and front pillars, and the connecting shaft at the crossover point of the backward link and forward link The lower end of each of the rearward link and the forward link is fixed so that it cannot move up and down, a lower slide piece is provided at the upper end of the rearward link, and the upper end of the forward link is raised. Since the slide piece is provided, a vertical downward load due to the weight of the lower slide piece is applied to the backward link, and a vertical downward load due to the weight of the upper slide piece is applied to the forward link, thereby restraining the X-shaped autonomous expansion / contraction mechanism to the deployed posture. Thus, it has an advantage that the longitudinal length of the gate-type frame group developed in a hood stretched state on the loading platform floor can be more stably maintained.

    In addition, the upper end of the backward link is pivotally mounted in the front and rear gate form frames of the gate form frame group above the rear pillar part, and the rear and rear of the gate form group group in the front and rear gate form frames of the gate form group group and below the front pillar part. The lower link is pivotally attached through a lower slide piece that allows the lower link to slide up and down, and the upper end of the forward link is pivotally mounted above the front column in the front and rear gate frames of the gate frame group. Attached via an upper slide piece that allows the lower end of the forward link to be vertically slidable below the rear pillar part and above the lower slide piece in the front and rear gate form frames of the gate form frame group. If the connecting shaft is provided at the crossover point of the backward link and the forward link, and the autonomous extension / contraction mechanism including the backward link and the forward link crossed in an X shape is provided, the basic of the present invention described above In the same way as the loading platform hood tension frame device, each gate form frame can be deployed in reverse order, or the rear end can be It can be moved and folded one by one from the formwork so as to be close to the adjacent door formwork. Cargo loading can be quickly opened and closed as it is unloaded. Also, when carrying out items such as granular materials and powdered parts, the rear end is folded one by one from the gate formwork, greatly improving the efficiency of cargo unloading work and freely covering the entire length of the hood according to the cargo volume After the crossover of the lower slide piece and the upper slide piece in an X-shape, the crosswind resistance to the hood while the freight vehicle is running can be reduced, and safer fuel-efficient driving can be realized. It acts to close the tilting link and the tilting link, enhances the folding operability of the autonomous expansion / contraction mechanism, and achieves a great effect of realizing a smoother front-rear length shortening operation.

    In addition, each axis that connects the end of the rearward link and the forward link that crosses the X-shaped autonomous telescopic mechanism to the corresponding front and rear column parts respectively has an axis that connects to the rear column part. The forward link and the reverse link have the same length as long as they have an offset relationship slightly offset toward the front column and the shaft center connected to the front column is slightly offset toward the rear column. Since it can be dimensioned, when the portal frame is expanded or folded, the frictional resistance of each part is distributed substantially evenly, and a smoother longitudinal expansion and contraction operation of the portal frame group can be realized. Further, the forward link, the reverse link, the connecting shaft, the attached shaft portion and the lower / upper slide piece can be used as common parts, and the production efficiency is remarkably improved.

    A gate frame that has a self-extending / retracting mechanism provided with at least a lower slide piece at the lower end of the lower slide piece between the upper and lower columns of the gate form frame group in the gate form frame group. When deploying the rear, the lower slide piece can be controlled to the lower limit, the backward link angle can be controlled to control the backward movement of the rear formwork, and it is necessary. If the upper slide piece is provided with a top stop portion that restricts the upward movement of the upper slide piece, the amount of the upper slide piece is restricted to the upper stop point and the forward link angle of the forward link is increased. It becomes possible to control the amount of backward movement of the rear gate formwork, and it is possible to more reliably prevent unnecessary expansion of the gate formwork group.

    Then, the autonomous extension / contraction mechanism arranges a stop portion for restricting the lower slide piece to be lowered at least at the lower end of the lower slide piece between the upper and lower columns of the gate form frame in the gate form frame group. If the height adjustment part is temporarily fixed so that the vertical position of the part can be changed, the bottom stop point of the lower slide piece can be adjusted and set arbitrarily, and the retract amount of the rear gate formwork can be set arbitrarily In addition, if necessary, an upper stop is provided at the upper stop of the upper slide piece to restrict the upper slide piece, and the upper and lower positions of the upper stop can be changed temporarily. The height adjustment part is provided so that the upper stop point of the upper slide piece can be adjusted and set arbitrarily, and the retreat amount of the rear formwork can be set arbitrarily. Long dimensions can be set more freely, and the hood extension range for the loading platform floor The degree of freedom of setting the front and rear lengths of the door is greatly increased, and it exhibits the excellent feature that the degree of freedom to adjust the amount of expansion for each gate form accompanying the loading and unloading work can be greatly improved. It will be.

    The autonomous telescopic mechanism is temporarily fixed to the lower slide piece at a height position arbitrarily selected with respect to the rear pillar part, and the upper slide piece is attached to the front pillar part. By providing a sliding temporary fixing portion that can be temporarily fixed at an arbitrarily selected height position, the lower slide piece and the upper slide piece are temporarily fixed at an arbitrarily selected height, and the gate frame 1 Since the set position of each piece can be set freely and temporarily fixed as it is, even if the mounted vehicle is running, the gate frame is inadvertently moved back and forth, and the associated gate frame group length There is also an advantage that it is possible to provide a trolley frame device for a cargo bed that can prevent inadvertent shortening and deployment more reliably and can significantly improve stability and safety.

In implementing the present invention having the above-described configuration, the best or desirable mode will be described.
The gate-type frame group has a function of allowing the loading platform hood to be stretched to secure a cargo storage room with a predetermined height between the left and right ends of the loading platform floor and between the front and rear ends. In the tensioned state, a plurality of portal frames must be arranged at appropriate intervals across the front and rear ends of the loading platform floor to be installed, and sufficient strength is obtained without greatly loosening the loading platform hood. Should have a shape and strength that can be supported and stretched.

    A plurality of the gate form frames are arranged in the front-rear direction on the loading platform floor to support the hood side walls on the left and right ends of the loading platform floor, and the hood top surface can be supported at a predetermined height position on the loading platform floor. In addition, the portal form frame has a function to support and stretch the longitudinal cross-sectional shape of the front and rear positions of the tensioned hood with sufficient strength. The left and right column parts that can be placed in an upright posture, and the beam part having a length corresponding to the left and right width of the loading platform floor to be installed between the left and right column parts, The left and right column parts and the beam part can be integrated, and each can be a separate part, which can be combined in a disassembleable manner by screw connection or connection between fitting parts, Parts consist of metal bars and pipes, various fiber reinforced plastic bars and pipes, etc. For as is desirable.

    The left and right column parts can support and stretch the left and right side walls of the loading platform hood, and can support the left and right ends of the beam part at a predetermined height position. It should have the function of being able to be placed and the straight bar should be placed in a vertical position on the loading platform floor, but the straight bar should be inclined to either the inside or outside of the loading platform. It is possible to lower and smooth the sliding movement in the front-rear direction of the left and right width ends of the loading platform floor at the lower end. A pulley such as a caster or a sliding mechanism such as a guide rail may be provided.

    The beam part can support and stretch the top surface of the loading platform hood, and has a function that allows the upper ends of the left and right column sections to be integrally connected with an interval equivalent to the width between the left and right of the loading platform floor. The front shape can be the same as a general hood skeleton shape, and an expansion / contraction mechanism is built in the entire width of the left / right or in the middle, or multiple types with different width / width dimensions are prepared. The width between the left and right sides of the gate form frame can be adjusted, for example, by appropriately selecting from among them, and for example, a gable roof-shaped convex bent line rod shape, a single flow Either one of the left and right column parts is elongated to form a roof, and is formed into a slanted bar shape, an arched curve bar is formed into a thatched roof shape, and a flat roof shape is also shown in the examples described later. A variety of horizontal straight bars It is possible to Jo ones.

    The autonomous telescopic mechanism connects the front and rear pillars of the gate frame adjacent to each other before and after the gate frame group arranged between the front and rear ends of the loading platform floor, and connects the gate frame to the adjacent gate frame. It has the function of being foldable so that it can be moved in the front-rear direction independently, and the upper end of the reversing link can be slid up and down above the rear column in the front and rear portal frame of the portal frame group And the lower end of the forward link is pivotally mounted below the rear column in the front and rear gate frame of the gate type frame group, and the front and rear gate frame of the gate type frame group. The upper end of the forward link is pivotally attached via the upper slide piece above the lower slide piece of the front pillar, and a connecting shaft is provided at the backward link and the forward link crossing point. It should consist of a back-and-forth link and a front-to-back link. On the other hand, the upper end of the reverse link is pivotally attached, and the lower frame of the portal frame group front and rear gate frames, below the front pillar, through the lower slide piece that allows the lower end of the reverse link to slide up and down. Axle-mounted, and the upper end of the forward link is pivotally mounted on the upper side of the front column part in the front and rear gate frame of the gate type frame group, and in the rear column part of the front and rear gate type frame of the gate type frame group. Lower and above the lower slide piece, the lower end of the forward link is pivotally attached to the upper slide piece, a connecting shaft is provided at the backward link and the forward link crossing point, and it is crossed in an X shape. It can consist of links and forward links.

    The reverse link has the function of forming a part of the autonomous telescopic mechanism by crossing and connecting in an X shape with the forward link between the front and rear gate frame of the portal frame group, and has the same length as the forward link The center of each end is pivotally connected by a connecting shaft, its lower end is pivotally attached under the front column part in the front and rear gate frame of the gate frame group, and its upper end is the gate type It should be pivotally mounted on the top and bottom gate frame of the frame group above the rear pillar part via a lower slide piece that can be slid up and down, and the upper end of the gate group frame group It is pivotally attached to the upper part of the rear pillar part in the frame, and the lower end is pivotally attached to the lower part of the front pillar part in the front and rear gate form frames of the gate-type frame group via a lower slide piece that can slide up and down. It can be

    The forward link crosses and connects in an X shape between the front and rear gate frames of the portal frame group together with the backward link, and has the function of constituting a part of the autonomous telescopic mechanism, and has the same length as the backward link The center of each end is pivotally connected by a connecting shaft, its lower end is pivotally attached to the front and rear gate frames of the portal frame group and below the rear column, and its upper end is a portal. It should be pivotally attached via the upper slide piece above the lower slide piece of the front column in the front and rear gate form frames of the frame group, and the upper end of the gate group form the front and rear gate form frames of the gate form frame group The upper part is pivotally attached to the upper part of the front pillar part, and the lower end thereof is slidable up and down in the front and rear gate form frames of the portal frame group, below the rear pillar part and above the lower slide piece. It can be pivotally attached via a slide piece.

    The connecting shaft that connects the rearward link and the forward link can be pivoted so that both the rearward link and the forward link can be opened and closed between a state close to an upright position and a state close to a horizontal position. It must be capable of being pivotably connected with sufficient strength at the center position between both ends in the longitudinal direction of both the backward link and the forward link, in other words, in an X-shape. It must be provided at the crossing point located at the center of the crossing rearward link and the front / rear column part of the forward link, and consist of a columnar or tubular shaft penetrating both in the horizontal direction. It is possible to combine the shaft part integrated with either the backward link or the forward link with the bearing part provided at the other corresponding part. Rolling bearings, etc. It can be made by incorporating the bearing component.

    The pivoting part that connects the rearward link and the forward link to the left and right column parts is pivoted at the lower end of the rearward link part below the front pillar part in the front and rear gate form frames of the portal frame group and below the rear pillar part. The lower end of the forward link is pivotally attached, or the upper part of the rear form part of the front and rear gate form frames of the gate form frame group is attached to the upper part of the forward link, and the upper part of the front post part. It has one of the functions of pivoting on the upper end of the forward link, and the rear link and the forward link end to be pivoted can be pivotally mounted with sufficient strength. In the front and rear gate frames adjacent to the front and rear in the gate frame group, the axis of the lower end of the rear link that is pivotally attached to the lower part of the front column, slightly from the front column The axis of the lower end of the forward link that is offset near the rear column and pivotally attached to the lower part of the rear column is off slightly from the rear column toward the front column. It is desirable to have a closed arrangement relationship, and as shown in the embodiments described later, the bracket has a bracket that can be fixed to the mounting position of the left and right column parts, and a support shaft provided at an appropriate position of the bracket, It is preferable that the connecting end portion of the forward link is connected rotatably.

    The lower slide piece and the upper slide piece have the corresponding ends of the backward link and forward link in the front and rear gate frames in the front and rear gate frames so that the autonomous telescopic mechanism can be folded and unfolded. It has a function to enable axial mounting so that it can be slid up and down in place, and the upper end of the reverse link can be slid up and down above the rear column in the front and rear gate frame of the gate frame group. It should be attached so that the upper end of the forward link can be slid up and down above the lower slide piece of the front column part, In the frame, the lower end of the rearward link is pivotally mounted below the front pillar part so as to be slidable up and down, and the lower end of the forward link is located below the rear pillar part and higher than the lower slide piece. It can be pivotally mounted so that it can slide up and down. Positioning relationship where the axis of the frame is slightly offset from the front column and slightly closer to the rear column, and the axis of the lower slide frame of the rearward link is slightly offset from the rear column and slightly closer to the front column The upper slide piece provided at the lower end of the forward link is offset slightly from the rear pillar portion toward the front pillar portion, and the lower slide provided at the lower end of the backward link. The axial center of the piece may be offset slightly from the front pillar portion toward the rear pillar portion.

    More specifically, the lower slide piece and the upper slide piece are, as shown in the embodiment described below, a slider portion in which the lower slide piece fits slidably up and down above the rear rear pillar portion. And an offset support portion having a horizontal pivot shaft that projects from the upper end of the slider portion and is offset slightly from the rear column portion toward the front column portion. The upper slide piece hangs above the front pillar part so as to be slidable up and down above the lower slide piece, and hangs down to the lower end of the slider part. It is desirable that an offset suspension portion having a horizontal pivot shaft as an arrangement relationship offset toward the column portion is integrated.

    The slider part can be mounted so that the lower slide piece and the upper slide piece are slidable in the vertical direction at appropriate positions in the middle of either the front pillar part or the rear pillar part in the front and rear gate form frames of the gate form frame group. It has the function of making it possible to integrate a horizontal pivot shaft that can pivotally mount the corresponding end portions of the rearward link and the forward link in a desired position, such as an annular shape, a cylindrical shape, a tubular shape, etc. In addition to the closed cross-sectional shape, it can be slidably mounted in the middle of either the front or rear column part, and can be slid up and down. It is possible to slidably fit up and down around the rail, and the rails, guide grooves, etc. that are vertically installed in the appropriate range between the top and bottom of the portal frame column (parallel to the column) And can be slidably fitted to the body.

    The autonomous telescopic mechanism is provided with a bottom stop that regulates lowering of the lower slide piece at least at the lower end of the lower slide piece between the upper and lower column parts of the gate form frame group. It is desirable that an upper stop portion for restricting the upper slide piece to be lifted is provided at the upper stop point of the piece, and the lower stop portion restricts the lower stop point of the lower slide piece and is provided after the backward link. It has a function to regulate the tilt angle and to regulate the maximum distance before and after the deployment of the front and rear portal formwork, and as shown in the examples described later, it has a height adjustment part and has a front and rear portal formwork The maximum distance between before and after deployment can be adjusted, and the front and rear deployment length dimensions of the portal form frame group can be adjusted and set appropriately according to the front and rear length dimensions of the loading platform floor to be installed, and if necessary An upper stop is provided at the upper end of the upper slide piece to prevent the upper slide piece from rising. The top stop can regulate the top stop point of the upper slide piece, regulate the forward angle of the forward link, and can regulate the maximum distance before and after deployment of the front and rear portal formwork As shown in the examples to be described later, it has a height adjustment part and adjusts the maximum distance between before and after deployment of the front and rear gate formwork, so that the front and rear length dimensions of the loading platform floor to be installed Accordingly, the longitudinal length of the portal frame group can be appropriately adjusted and set.

    Autonomous telescopic mechanism, lower slide piece bottom part has a function that can restrict the lower slide piece from moving near the bottom point of its vertical sliding range, and in the appropriate position between each column part It can be integrated into convex parts, annular parts or block parts incorporated with screws, bolts, etc., and by adding a height adjustment part, the lowering amount of the lower slide piece is regulated, It is possible to selectively regulate the length of the autonomous telescopic mechanism before and after deployment, and the upper stop of the upper slide piece moves upward beyond the vicinity of the upper stop point of the upper and lower slide range of the upper slide piece. In the same way as for the lower slide piece described above, it is integrated into the appropriate place between the upper and lower parts of each pillar, and is integrated with convex parts, thumb screws, bolts, etc. Block shape It is possible to make it a product, etc., with the addition of a height adjustment part, it is possible to regulate the rising amount of the upper slide piece and selectively regulate the shortened front and back length of the autonomous telescopic mechanism, The height adjusting portion can be temporarily fixed to the lower stop portion or the upper stop portion by screwing in a proper position between the upper and lower portions of the column portion or inserting a pin with a retaining mechanism.

    The autonomous telescopic mechanism and the lower sliding piece sliding temporary fixing part regulate the lower sliding piece to an arbitrarily selected height position within the vertical sliding range, and temporarily attach it to either the front or rear column part. Fixed and capable of temporarily fixing the longitudinal length of the autonomous telescopic mechanism, and can be temporarily fixed by screwing the lower slide piece in place between the top and bottom of the column or inserting a pin with a retaining mechanism The upper sliding piece sliding temporary fixing portion restricts the upper sliding piece to an arbitrarily selected height position within the vertical sliding range, and is attached to the other one of the front and rear column portions. It is possible to temporarily fix the front and back length of the autonomous telescopic mechanism, and to fix the screw with a thumbscrew or bolt in a suitable position between the upper and lower columns of the lower slide piece and the insertion of a pin with a retaining mechanism. Can be temporarily fixed by Door can be.

The loading platform floor is an installation target of the loading platform hood tension frame device of the present invention, and is shown as a loading platform for small trucks and light trucks as shown in the examples described later. It can be used as a loading platform for flat-body freight vehicles such as trucks, trailers, railway freight cars, etc., and can also be a loading platform-like storage facility installed outdoors.
In the following, the structure of the present invention will be described in detail together with an embodiment representative of the present invention shown in the drawings.

The drawings show some typical embodiments embodying the technical idea of the gantry frame device for cargo bed according to the present invention.
It is a perspective view which shows the hood tension frame apparatus mounted in the light truck. It is a side view which shows the hood tension frame apparatus for a loading platform. It is a front view which shows the hood tension frame apparatus for a loading platform made into the longitudinal cross-section. It is a top view which shows the hood tension frame apparatus for a loading platform. It is a side view which shows the hood tension frame apparatus for a loading platform which moves forward the portal frame of a rear end. It is a top view which shows the hood tension frame apparatus for a loading platform which moves forward the portal frame of a rear end. It is a side view which shows the hood tension frame apparatus for a loading platform which moves forward the 2nd gate form frame from a rear end. It is a top view which shows the hood tension frame apparatus for a loading platform which moves forward the 2nd gate form frame from a rear end. It is a side view which shows the hood tension frame apparatus for the loading platform which moved forward three portal frame. It is a top view which shows the hood tension frame apparatus for the loading platform which moved forward three portal frame. It is a side view which shows the hood tension frame apparatus for the loading platform which changed a part. It is a perspective view which shows the conventional type hood tension frame mounted in the light truck. It is a side view which shows the conventional type hooded frame in the unfolded state. It is a front view which shows the conventional hood tension frame made into the longitudinal section. It is a side view which shows the conventional type hood tension frame in the middle of folding. It is a side view which shows the conventional type hooded frame fully folded.

    The example shown in FIG. 1 thru | or FIG. 10 is the portal form frame group 2 which consists of the plurality of the portal form frames 20 which horizontally mounted the beam part 22 between the right-and-left column parts 21 and 21 upper end arranged on the installation object loading platform floor 70 right and left width end. The lower end of the rear link 30 is attached to the lower side of the front pillar 21 in the front and rear gate forms 20 and 20 of the front and rear gate group 2, and the rear link 30 is located above the rear pillar 21. The upper end is pivotally attached via the lower slide piece 5, and the lower end of the forward link 31 is axially attached below the rear pillar portion 21 in the front and rear gate form frames 20, 20 of the gate form frame group 2. The upper end of the forward link 31 is pivotally attached to the upper part of the lower slide piece 5 of the section 21 via the upper slide piece 6, and a connecting shaft 32 is provided at the intersection of the rearward link 30 and the forward link 31. According to the present invention, an autonomous extension / contraction mechanism 3 including a backward link 30 and a forward link 31 crossed in a letter shape is provided. It illustrates an embodiment representative of the base for HoroCho frame device.

    As can be clearly understood from these drawings, the gantry frame device 1 for the loading platform of the present invention includes left and right column portions 21 that can be arranged in an upright posture at the left and right width ends of the loading platform floor 70 on which the light truck 7 is installed. A plurality of gate-shaped frames 20 made of galvanized steel pipe, made of aluminum alloy pipe, and the like, which are horizontally mounted between the upper ends of 21 and a beam portion 22 having a length corresponding to the left and right width of the loading platform floor 70 to be installed, are adjacent to each other. Are formed in a portal frame group 2 having the same height and are combined at the lower ends of the left and right column parts 21, 21,... A resin grounding cap and a sliding cap are mounted, respectively, and one gate frame 20 arranged at the foremost side of the loading platform floor 70 to be installed is connected to fitting portions (not shown) at a proper position of the loading platform 70 torii part. ).

    In the front and rear gate frames 20, 20 adjacent to the front and rear in the portal frame group 2, a single cylinder portion that is externally attached to the front column portion 21, and an end cylinder portion that is positioned near the front column portion 21. A bracket 40 having a tongue piece projecting forward or backward from either the front or rear is fixed, and a support shaft 41 provided on the tongue piece portion of the bracket 40 is used as a shaft attachment portion 4, and the lower end of the reverse link 30 is a horizontal axis. It is pivotally mounted around the center, and in the front and rear gate frames 20, 20 adjacent to the front and rear in the portal frame group 2, the upper and lower sides of the rear column 21 are positioned above the rear column 21. A slider portion 50 that is slidably fitted, and a tongue-like offset support portion 51 slightly protrudes upward from the front side wall of the slider portion 50, and a horizontal pivot shaft is provided at the upper end of the offset support portion 51. The lower slide piece 5 provided with 52 is mounted, and the backward link 30 is connected via the lower slide piece 5. End, to the upper close position of the rear pillar portion 21, and those axially attached in a freely vertically up and down slidably and rotates.

    In the front and rear gate frames 20, 20 adjacent to the front and rear in the portal frame group 2, a single cylinder portion that is externally attached to the rear column portion 21, and an end tube portion at an appropriate position near the lower portion of the rear column portion 21. A bracket 40 having a tongue piece projecting from the front or rear or both front and rear is fixed, and a support shaft 41 provided on the tongue piece portion of the bracket 40 is used as a shaft attachment portion 4, which is the same length as the backward link 30. The lower slide piece of the front pillar portion 20 is mounted in the front and rear gate frames 20 and 20 adjacent to the front and rear gate frames 20 and 20 adjacent to the front and rear in the gate frame group 2 so that the lower end of the forward link 31 is pivotally mounted around the horizontal axis. A slider portion 60 that is slidably fitted to the front column portion 20 and is slidably attached to the front column portion 20 at an appropriate position near the upper side, and a tongue-like offset suspending portion 61 is directed downward from the rear side wall of the slider portion 60. The upper support is provided with a horizontal pivot shaft 62 at the lower end of the offset support 61. The id piece 6 is mounted, and the upper end of the forward link 31 is axially attached to the upper position of the rear column portion 21 so as to be vertically slidable and rotatable with respect to the upper position through the upper slide piece 6. To do.

    Further, a connecting shaft 32 is provided at the crossing point between the upper and lower ends of the backward link 30 and the forward link 31 crossing each other so as to be pivotable about a horizontal axis, and crossed in an X shape. An autonomous telescopic mechanism 3 composed of a backward link 30 and a forward link 31 is provided, and the portal frame 20, 20 adjacent to the front and rear in the portal frame group 2 is a unit of folding, and the autonomous telescopic mechanism 3 is of a portal type. Each of the frames 20 can be individually moved and folded so as to be adjacent to the portal frame 20 adjacent to the front, and the autonomous expansion and contraction mechanism 3 is provided for each of the portal frames 20 in the portal frame group 2. An annular bottom stop portion 33 that restricts the lower slide piece 5 from being lowered is externally fitted to a bottom stop point that is the lower position of the lower slide piece 5 in the folded state between the upper and lower columns 21, and the peripheral wall of the lower stop portion 33 A screw hole horizontally penetrating into the screw hole, and screwed into the screw hole from the outside. The height adjustment part 34 which consists of a volt | bolt of the length which can be joined to the pillar part 21, is temporarily fixed so that the up-and-down position of the bottom stop part 33 can be changed is provided, and it becomes the folding state raising position of the upper slide piece 6 An annular upper stopper 35 that restricts the upward movement of the upper slide piece 6 is externally fitted to the upper stopper point, and a screw hole that horizontally penetrates the peripheral wall of the upper stopper 35 and is screwed into the screw hole from the outside. The top end portion 35 is composed of a bolt with a length that can be joined to the column portion 21, and is provided with a height adjusting portion 34 that temporarily fixes the upper and lower positions of the upper stopper portion 35 so as to be changeable. Fits at the upper edge of the edge of the loading platform floor 70 to be installed on the light truck 7 at an appropriate position at least below the gate frame 20 arranged at the rearmost and the pivoting portions 4, 4 of the left and right column portions 21, 21. It is made of a bent plate having a cross-sectional shape of a rollover L shape, and can be externally fitted to the column portion 21 at the base of the bent plate In the peripheral wall of the short pipe, screw holes are drilled, bolts are screwed, and engagement fittings 23 and 23 having the same height adjusting portion 34 as described above are provided.

As shown in FIG. 5, the sliding temporary fixing portion 36 is further formed by forming a screw hole at an appropriate position on the peripheral wall of the slider portion 50 of the lower slide piece 5 of the autonomous telescopic mechanism 3 and screwing a bolt into the screw hole. And tightening the sliding temporary fixing portion 36 bolt, and can be temporarily fixed at a height position arbitrarily selected with respect to one of the front and rear pillar portions 21 and 21 attached, Further, a screw hole is formed in a suitable position on the peripheral wall of the slider portion 60 of the upper slide piece 6, and a sliding temporary fixing portion 36 is provided by screwing a bolt into the screw hole. It is assumed that it can be temporarily fixed at a height position arbitrarily selected with respect to one of the attached front and rear pillars 21 and 21 by tightening.
It is assumed that a hood (not shown) can be stretched by using the portal frame group 2 as a support frame by the loading platform hood tension frame apparatus 1 having the above structure.

    As shown in FIG. 11, the loading platform hood tension frame device 1 of the present invention has an upper end of the reverse link 30 in the front and rear gate frames 20, 20 of the portal frame group 2 and above the rear column portion 21. Attached to the portal frame group 2 and the front and rear portal mold frames 20, below the front pillar portion 21, via the lower slide piece 5 that allows the lower end of the rearward link 30 to slide up and down, In addition, the upper end of the forward link 31 is pivotally mounted above the front column portion 21 in the front and rear gate mold frames 20 and 20 of the gate mold group 2, and Centered below the rear pillar portion 21 and above the lower slide piece 5 via the upper slide piece 6 that allows the lower end of the forward link 30 to slide up and down. A connecting shaft 32 is provided at the crossing point of the forward link 31, and the autonomous telescopic mechanism 3 including the backward link 30 and the forward link 31 crossed in an X shape is provided. It is possible to become one.

(Operation / Effect of Example 1)
As shown in FIGS. 1 to 4, the gantry frame device 1 for the loading platform according to the present invention having the above-described configuration is mounted on a loading platform floor 70 to be installed as a light truck 7. The front gate frame 20 is fixed to the torii portion of the light truck 7, and at least the engagement metal fittings 23, 23 provided on the left and right column portions 21, 21 of the rearmost gate frame 20 are connected to the upper end of the light truck 7. When engaged with the edge, it can be securely fixed to the loading platform, and further, the autonomous telescopic mechanism 3, 3,... 1 is expanded to an expanded length L, and the total length AL is set to a length (AL = L × N) obtained by multiplying the expanded length L by the autonomous expansion / contraction mechanism 3, 3,... 4, the entire loading platform floor 70 to be installed can be covered. Outside of the apparatus 1 it is possible to stretched a hood (not shown) crocodile.

    As shown in FIG. 1, FIG. 5 and FIG. 6, when one gate frame 20 arranged at the tail end of the loading platform floor 70 to be installed is moved forward as indicated by the white arrow in FIG. Only the left and right autonomous telescopic mechanisms 3 and 3 of the tail are folded, and the length before and after the folding is gradually reduced to the folding minimum value E. Thereafter, as shown in FIG. 7 and FIG. Similarly, the frame 20 is moved forward and, as shown in FIGS. 9 and 10, finally, all the autonomous telescopic mechanisms 3, 3,... It can be folded.

    Therefore, for example, when a granular cargo such as rice husk is mounted on the loading platform floor 70 on which the light truck 7 is installed and transported, the conventional hood tension frame 8 as shown in FIGS. Until all the granular cargos were unloaded, they could not be folded at all due to the interference of the granular cargos. However, these disadvantages were solved and shown in FIGS. 1 to 10 according to the amount of rice husks mounted. Thus, the installation total length AL can be freely adjusted to the shortened total length SL from the rear end of the portal frame group 2, and a part of the mounted rice husk can be carried out from the rear of the loading bed floor 70 and moved to another place. In such cases, the rear gate mold 20 can be moved forward by one unit without any trouble so that the rear part of the cargo bed floor 70 that has been emptied after carrying the cargo is exposed, and the rear part of the hood is smoothly folded. Can reduce crosswind resistance, making it safer and safer The transports possible ones.

    Since the bottom stop 33 having the height adjusting unit 34 enables the lowering position of the lower slide piece 5 to be arbitrarily set at an appropriate position within the vertical sliding range of the lower slide piece 5, It is possible to appropriately set the amount of retraction of the rear column part 21, it is possible to prevent the autonomous telescopic mechanism 3 from being unfolded due to inadvertent retraction of the rear column part 21, and the top stopper having the height adjustment unit 34 The unit 35 can arbitrarily set the maximum ascending position of the upper slide piece 6 at an appropriate position within the upper and lower sliding range of the upper slide piece 6, and the autonomous telescopic mechanism 3 by the careless advance of the rear column part 21. , And acts as a safety device for the autonomous extension / contraction mechanism 3, and more reliably prevents damage to the autonomous extension / contraction mechanism 3 and subsequent dropout.

    As shown in FIG. 5, the sliding temporary fixing portion 36 of the lower slide piece 5 and the sliding temporary fixing portion 36 of the upper slide piece 6 are within the vertical sliding range of the upper and lower slide pieces 5, 6. Since each of the autonomous telescopic mechanisms 3 can be temporarily fixed at a desired height position, any one of a shortened front and rear length state, a fully folded back and forth shortest length state, and a fully unfolded maximum length state before and after full deployment. The temporary fixed state can be securely fixed to the state securely, and the temporary fixed state can be safely held, and the set front-rear length arbitrary dimension can be securely held regardless of the deployed state and shortened state of the autonomous telescopic mechanism 3. The front and rear longitudinal arbitrary dimensions can be easily changed as necessary.

(Conclusion)
As described above, the gantry frame device for the loading platform according to the present invention can achieve the intended purpose evenly by its novel configuration, and is easy to manufacture, compared with the conventional hood framework technology. As a result, the workability of loading and unloading cargo can be greatly improved, and it can be extended and retracted according to the amount of cargo. In this case, it is possible to increase driving safety, reduce air resistance, reduce fuel consumption, and make the vehicle much more economical. Not only in the automobile industry that manufactures freight vehicles, but also in the automobile parts industry and various industries that use freight vehicles, it is expected to be widely used and spread.

1 Covering frame device for loading platform 2 Gate frame group
20 Same formwork
21 Same as left (right) column
22 The beam
23 Same engagement bracket 3 Autonomous telescopic mechanism
30 Follow-up links
31 Same as before Link
32 Same connecting shaft
33 Same stop
34 Height adjustment part
35 Same as above 4 Stopping part
40 Same bracket
41 Same spindle 5 Lower slide piece (lower slide piece)
50 Same slider part
51 Same offset support
52 Same horizontal pivot 6 Upper slide piece (upper slide piece)
60 Same slider part
61 Same offset suspension
62 Same horizontal pivot 7 Light truck
70 Same loading platform 8 Conventional hood frame 9 Conventional X-link
90 Same as conventional forward link
91 Same as above
92 Sliding tube AL Total length of portal frame group 2 SL Reduced total length of portal frame group 2 L Extended length of autonomous telescopic mechanism 3 E Folding minimum value of autonomous telescopic mechanism 3

Claims (9)

    Between the upper ends of the left and right pillars arranged at the left and right width ends of the loading platform floor to be installed, there is a gate-type frame group consisting of a plurality of gate-type frames with the beam section mounted horizontally. In the frame, the lower end of the rearward link is pivotally mounted below the front pillar part, and the upper end of the rearward link can be slid vertically above the rear pillar part in the front and rear gate form frames of the gate type frame group. And the lower end of the forward link is pivotally mounted below the rear column in the front and rear gate frame of the gate type frame group. Centered on the upper slide piece, which allows the upper end of the forward link to slide up and down, above the lower slide piece in the middle and front pillars, and the connecting shaft at the crossover point of the backward link and forward link A trolley frame device for a cargo bed provided with an autonomous telescopic mechanism comprising a rearward link and a forward link that are provided and crossed in an X shape.     Between the upper ends of the left and right pillars arranged at the left and right width ends of the loading platform floor to be installed, there is a gate-type frame group consisting of a plurality of gate-type frames with the beam section mounted horizontally. In the frame, the lower end of the rearward link is pivotally mounted below the front pillar part, and the upper end of the rearward link can be slid vertically above the rear pillar part in the front and rear gate form frames of the gate type frame group. And the lower end of the forward link is pivotally mounted below the rear column in the front and rear gate frame of the gate type frame group. Centered on the upper slide piece, which allows the upper end of the forward link to slide up and down, above the lower slide piece in the middle and front pillars, and the connecting shaft at the crossover point of the backward link and forward link An autonomous telescopic mechanism consisting of a reverse link and a forward link crossed in an X-shape is provided. Sequentially one by one frame, alone moved into proximity to the portal frame adjacent to the front, the bed for HoroCho frame device being characterized in that it is assumed foldable.     A gate-shaped frame with a beam span that is equivalent to the left and right width of the loading platform floor, placed between the upper ends of the left and right pillars that can be placed in an upright position at the left and right width ends of the loading platform floor. A plurality of adjacent gates form a group of gate frames that are a combination of at least one of the adjacent heights, the same height as each other, and the adjacent heights different from each other. In the front and rear portal form frames adjacent to the front and rear of the front, the lower end of the reverse link is pivotally mounted around the horizontal axis at an appropriate position near the front column, and adjacent to the front and rear in the gate form group. In the front and rear portal formwork, pivotally mounted around a horizontal axis through a lower slide piece that allows the upper end of the rearward link to slide up and down at an appropriate position above the rear pillar, and In the front and rear gate form frames adjacent to each other in the gate form group group, in the appropriate position near the lower part of the rear column, the same as the backward link. The lower end of the long forward link is pivotally mounted around the horizontal axis so that it is higher than the lower slide piece of the front pillar in the front and rear gate frames adjacent to the front and rear in the gate frame group. At the right upper position, the backward link and the forward link crossing point that are pivotably mounted around the horizontal axis through the upper slide piece that allows the upper end of the forward link to slide up and down and cross each other. In addition, a connecting shaft that pivots both sides around the horizontal axis is provided, and an autonomous telescopic mechanism consisting of a rearward link and a forward link crossed in an X shape is provided, and the rearmost end of the loading platform floor to be installed Gantry frame for loading platform, which can be independently moved and folded so as to be close to the gate frame adjacent to the front, one by one from the gate frame arranged in the gate, one by one by the autonomous telescopic mechanism apparatus.     Between the upper ends of the left and right pillars arranged at the left and right width ends of the loading platform floor to be installed, there is a gate-type frame group consisting of a plurality of gate-type frames with the beam section mounted horizontally. The upper end of the rearward link is pivotally mounted in the frame, above the rear column, and the lower end of the rearward link can be slid up and down in the front and rear portal frames of the gate frame group. Attached via the lower slide piece, and the upper end of the forward link is axially attached above the front pillar portion in the front and rear gate mold frames of the gate type frame group, and the front and rear gate types of the gate type frame group In the frame, below the rear pillar and above the lower slide piece, it is pivotally attached via an upper slide piece that allows the lower end of the forward link to slide up and down. A trolley frame for loading platform characterized in that a connecting shaft is provided at the crossing point, and an autonomous telescopic mechanism comprising a backward link and a forward link crossed in an X shape is provided. .     Each axis that connects the end of the backward link and forward link that crossed in an X-shape of the autonomous telescopic mechanism to the corresponding front and rear pillars slightly forwards the axis that connects to the rear pillar. 5. A trolley frame for a cargo bed according to any one of claims 1 to 4, wherein the hood has a layout relationship that is offset closer to the column portion and the shaft center connected to the front column portion is slightly offset closer to the rear column portion. apparatus.     An autonomous telescopic mechanism has a slider part whose lower slide piece is slidably fitted above and behind the rear pillar part, and protrudes from the upper end of the slider part, and is slightly closer to the front pillar part from the rear pillar part. And an offset support part having a horizontal pivot shaft that is offset relative to the upper slide piece. The slider part to be combined with the offset hanging part having a horizontal pivot shaft that is suspended from the front pillar part and slightly offset from the front pillar part toward the rear pillar part. The hood tension frame device for a cargo bed according to any one of claims 1 to 3.     The autonomous telescopic mechanism is provided with a bottom stop that restricts the lower slide piece at least at the lower end of the lower slide piece between the upper and lower column parts of the gate form frame group in the gate form frame group. 7. The trolley frame device for a loading platform according to claim 1, wherein an upper stop portion for restricting the upward movement of the upper slide piece is provided at the upper stop point of the piece.     The autonomous extension / contraction mechanism has a bottom stop portion that regulates the lower slide piece to be lowered at least near the bottom stop point of the lower slide piece between the upper and lower column parts of the gate form frame group. The height adjustment part that temporarily fixes the upper and lower positions of the upper slide piece is provided, and if necessary, an upper stop part that restricts the upper slide piece from being raised is arranged near the upper stop point of the upper slide piece. 7. The gantry frame device for a cargo bed according to any one of claims 1 to 6, further comprising a height adjusting portion for temporarily fixing the vertical position so that the vertical position can be changed. An autonomous telescopic mechanism allows the lower slide piece to be temporarily fixed at a height position arbitrarily selected with respect to one of the front and rear pillars, and its upper slide. 9. A sliding temporary fixing portion that can be temporarily fixed at a height position arbitrarily selected with respect to the other of the front and rear pillar portions to be mounted on the piece. A trolley frame device for a cargo bed according to claim 1.

Images