Cargo bed structure

Abstract

The objective is to provide a cargo bed structure that prevents the concentration of load on the cargo and enables stable use, while also achieving a more compact mechanism. [Solution] The cargo bed structure 1 according to the present invention is a cargo bed 1 having a base surface 2 having a predetermined area, a wall surface 3 standing upright at the rear position of the base surface 2, and a rod body 4 standing upright at the front position opposite the wall surface 3, wherein the cargo bed 1 has a mounting section 20 on which the rod body 4 is placed in an upright position, a mounting support section 22 that surrounds the mounting section 20 while having an open surface that leaves one side open, and a shielding cover body 30 having a shielding surface 31 that can open and close to shield the open surface, wherein the shielding cover body 30 is rotatably connected to a rotating shaft 34 located below the base surface 2, and rotates to open the shielding surface 31.

Description

Technical Field

[0001] The present invention relates to a vehicle platform towed by a bicycle or a carrier vehicle.

Background Art

[0002] Conventionally, when transporting a plurality of logs mainly in forestry, a dedicated bicycle with a platform or a vehicle platform towed by a carrier vehicle or a goods vehicle is often used. Such a platform has a predetermined number of logs stacked in multiple levels, has a wall surface on one side, and support columns are arranged on the other side. When taking out the logs on the platform, the support columns were removed, one side of the platform was lifted, and the logs were taken out by rolling them off from the other side.

[0003] There was a device for removing the logs by detaching the rod stand, which is a support column of such a platform, by engaging and disengaging the rod stand with an engaging pin and an engaging claw (see Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, since the above-described rod stand detaching device supports the rod stand by engagement with a claw and a pin, there is a problem that too much stress from the platform is applied to such an engagement position, and it is easily broken. In actual sites such as forestry, it may move on a mountain road with a step or be loaded only by the amount that can be carried on the platform, and there has been a demand for a platform structure in which such an engagement mechanism is strengthened and can be used stably.

[0006] Also, for stable use, it has been required that the structure be more compact and less likely to break.

[0007] Therefore, the present invention aims to provide a cargo bed structure that prevents the concentration of load on cargo and enables stable use, as well as to provide a more compact mechanism. [Means for solving the problem]

[0008] In view of the above problems, the cargo bed structure according to the present invention is a cargo bed having a base surface having a predetermined area, a wall surface standing upright at the rear position of the base surface, and a rod body standing upright at the front position opposite the wall surface, The aforementioned cargo bed has a mounting section on which the rod body is placed in an upright position, a mounting support surface that surrounds the mounting section while having an open surface that leaves one side open, and a shielding cover body having a shielding surface that can be opened and closed to shield the open surface. The shielding cover is rotatably connected to a rotating shaft located below the base surface, and rotates to open the shielding surface.

[0009] Furthermore, it is preferable to have a cover body that converts the forward and backward movement of an extendable and retractable part located below the base surface into rotational motion by the rotation axis of the shielding cover body.

[0010] Furthermore, the cargo bed has a discharge mechanism for discharging cargo loaded on the cargo bed, which has a discharge surface on its base, and a locking projection having a convex shape extending upward from the base. Preferably, the apex of the convex shape of the locking projection is located above the discharge surface.

[0011] Furthermore, it is preferable that the mounting portion for supporting the rod be positioned so as to protrude outward from the base surface.

[0012] Furthermore, the discharge mechanism has a discharge platform that follows the base surface and a discharge wall that follows the wall surface, and the front portion of the discharge platform is pivotally supported on a rotation axis, causing it to rotate and stand upright so that the discharge platform is tilted when viewed from the side. The discharge mechanism is preferably located in the center of the base surface and has a width that is shorter in the left-right and front-back directions than the base surface. [Effects of the Invention]

[0013] In a loading platform where the loading area is defined as the area enclosed by the wall and the rod on the platform surface, and the rod is pushed down to unload the cargo, conventional claw structures and the like used to maintain the upright position of the rod have been susceptible to damage due to the load on the maintenance structure. According to the invention described in claim 1, a shielding cover body has a shielding surface that shields the open surface of the rod placement portion, and the shielding cover body rotates on a pivot axis located below the platform surface to open the shielding surface, thereby preventing the load from concentrating on one part and providing a stable loading platform structure.

[0014] Furthermore, according to the invention described in claim 2, by rotating the shielding cover body through the extension and retraction movement of the telescopic moving part located below the base surface, it is possible to provide a loading platform structure with a more compact configuration that incorporates the necessary mechanisms below the base surface.

[0015] Furthermore, according to the invention described in claim 3, the discharge mechanism for unloading cargo is provided, and the discharge mechanism has a locking projection with a convex apex at a position higher than the discharge surface, thereby suppressing movement such as rolling back and forth on the loading platform during transport and other operations. This suppresses the concentration of load on the support portion that supports the rod and the shielding cover, making it possible to provide a loading platform structure that enables stable use.

[0016] Furthermore, according to the invention described in claim 4, since the mounting portion is positioned to protrude outward from the base surface, the swaying movement of the load is suppressed by the locking projection formed on the base surface, and the concentration of load on the mounting portion and shielding cover that support the rod is suppressed, thereby providing a stable loading platform structure.

[0017] Furthermore, according to the invention described in claim 5, since the unloading mechanism is located in the center of the loading platform, it is possible to avoid direct contact between the mounting portion that supports the rod body, the shielding cover body, and the locking projection, thereby providing a stable structure without hindering these functions. [Brief explanation of the drawing]

[0018] [Figure 1] This is an overall perspective view of the loading platform according to this embodiment. [Figure 2] This shows the loading platform according to this embodiment. (a) is a side view, and (b) is a side view in a state where luggage is loaded. [Figure 3] This is a front view of the loading platform according to this embodiment. [Figure 4] This is a plan view of the loading platform according to this embodiment. [Figure 5] This is a transparent view of parts in a side view of the loading platform according to this embodiment. (a) is the same state as FIG. 2, and (b) is a state where the unloading mechanism is erected from the state of (a). [Figure 6] This is a partially enlarged side view showing the mounting state of the rod according to this embodiment. (a) is the support state of the rod, (b) is a state where the shielding cover body is rotated to open the shielding portion, and (c) is a state where the rod is removed from the state of (b).

Mode for Carrying Out the Invention

[0019] (Embodiment) An example of the loading platform 1 which is an embodiment of the present invention will be described in detail based on the drawings. As an explanation of this embodiment, FIG. 2 will be used as a side view and FIG. 3 will be used as a front view for explanation. The position with the wall surface will be described as the back, and the side with the rod 4 will be described as the front. Further, the direction from the back to the front will be described as the front-rear direction, and the direction orthogonal to the front-rear direction will be described as the left-right direction.

[0020] Although not shown in the figure, the loading platform 1 of this embodiment is provided with wheels such as caterpillars below and is attached to a self-propelled vehicle. As another embodiment, it may be provided with only wheels below and towed by a towing vehicle.

[0021] As shown in Figures 1, 2, 3, and 4, the loading platform 1 consists of a base surface 2, a wall surface 3 that rises from one side of the base surface 2 (the rear side) to form the back, and rods 4, 4 that rise from both the left and right sides of the other side of the base surface 2 (the front side) to form the front. The rods 4, 4 are positioned on the side of the base surface 2 opposite to the side where the wall surface 3 is located, and in side view, the overall shape is roughly U-shaped (see Figure 2).

[0022] In a side view, the base surface 2 is the bottom surface, and the wall surface 3 which forms the back surface, and the front surface which has the rods 4, 4, are open except for the front surface which has the rods 4, 4, and the space between the rods 4, 4 is also open. The rods 4, 4 are placed on the lower mounting parts 20, 20 which will be described later, and are loosely connected to the wall surface 3 by connecting strings 41, 41 without tensioning the top.

[0023] In particular, as shown in Figure 2(b), the loading platform 1 of this embodiment is used for transporting cargo N such as cut timber and logs in forestry and the like, and the portion of the platform surface 2 of the loading platform 1 surrounded by the wall surface 3 and the rods 4, 4 becomes the loading space. Multiple loads are arranged in this loading space in a stacked manner. Since both sides of the loading platform 1 are open, it is possible to load cargo even if the leading or trailing parts of the cargo protrude from the platform surface 2.

[0024] In addition to Figures 1-4, Figure 5 will be shown to illustrate the unloading mechanism 10. The unloading mechanism 10 has a width smaller than the width of the base surface 2, and a width slightly shorter than the front-to-back width of the base surface 2, and is positioned at the center of the base surface 2 in the left-right direction. The unloading mechanism 10 has a roughly L-shaped form in side view, consisting of an unloading base surface 11 that follows the base surface 2 and an unloading wall surface 12 that follows the wall surface 3. Rotating axes 13, 13 are arranged on the front side of the unloading base surface 11, allowing it to rotate freely on the base surface 2.

[0025] As shown in Figures 5(a) and (b), the unloading mechanism 10 operates a hydraulic cylinder 14, which is an extendable and retractable part located below the platform surface 2 of the loading platform 1. The forward and backward extension and retraction motion of the hydraulic cylinder 14 rotates around the rotation axes 13, 13, causing the unloading platform surface 11 and the unloading wall surface 12 to rise up so that the unloading platform surface 11 becomes an inclined surface when viewed from the side. This guides the cargo N loaded in the loading space to roll down to the front side of the rods 4, 4, allowing it to be unloaded from the loading platform 1.

[0026] Let me explain the rods 4, 4. The rods 4, 4 are positioned on both sides of the front side of the base surface 2 of the loading platform 1, and more specifically, they are positioned on the mounting sections 20, 20 that protrude further forward from the front side of the base surface 2.

[0027] As shown in Figure 6, the mounting section 20 consists of a mounting base surface 21 on which the rod body 4 is placed, and a mounting support surface 22 that supports the lower part of the rod body 4 while leaving the front side open. A shielding cover body 30 is also arranged, which has a shielding surface 31 that shields the front side that is open by the mounting support surface 22. The mounting support surface 22 and the shielding surface 31 surround the lower part of the rod body 4, which is placed on the mounting base surface 21 in an upright position, and support the upright position.

[0028] The shielding cover body 30 has a shielding surface 31 that shields the front side of the mounting section 20, and cover body portions 32, 32 on both sides of the shielding surface 31 that are along the mounting support surface 22. The cover body portions 32, 32 have tip portions 32a, 32a that extend vertically along the aforementioned mounting support surface 22, central portions 32b, 32b that bend from the base end side of the tip portions 32a, 32a and extend in the front-rear direction to the area below the mounting section 20 and the base end portions 32c, 32c that bend from the base end side of the central portions 32b, 32b and extend vertically, and have a roughly U-shape when viewed from the side.

[0029] The shielding cover body 30 is rotatably connected to the loading platform 1 by a rotating shaft 34 at the central portions 32b, 32b of the cover body portions 32, 32. Elongated holes 35 are formed at the base ends 32c, 32c of the cover body portions 32, 32, and a support shaft 36 is positioned in this elongated hole 35. This support shaft 36 is connected to a hydraulic cylinder 37, which is an extendable and retractable part that moves back and forth in the front-to-back direction (from the wall side to the front side of the loading platform 1). The hydraulic cylinder 37 is located below the base surface 2, resulting in a compact configuration.

[0030] In this embodiment, the shielding cover body 30 rotates via a rotating shaft 34 as the support shaft 36 moves within the elongated hole 35 due to the forward and backward extension movement of the hydraulic cylinder 37. This rotation causes the shielding surface 31 of the shielding cover body 30 to open to the front, thereby opening the front side of the rod body 4 placed on the mounting section 20. Thus, the cover body bodies 32, 32 act as conversion members with an eccentric cam shape that converts the forward and backward extension movement of the hydraulic cylinder 37 into rotational movement by the rotating shaft 34. The hydraulic cylinder 37 and the rotating shaft 34 are located below the base surface 2, and a compact configuration is achieved while converting the movement into rotational motion by the cover body bodies 32, 32. Furthermore, by arranging these components in a portion surrounded by an outer wall hanging down from the base surface 2, a compact configuration that is also resistant to damage is achieved.

[0031] As in this embodiment, by supporting the rod 4 with a mounting portion 20 and a shielding cover 30 that protrude forward from the loading platform 1, even if a large amount of cargo N is loaded into the loading space of the loading platform 1, the shielding surface 31 of the shielding cover 30 supports the open surface of the mounting portion 20 with its surface, while the rotation axis 34 of the shielding cover 30 is rotatably supported below the loading platform 1, thus distributing the pressure from the cargo N. In conventional designs where the rod 4 is supported by pins, the pressure from the cargo N would concentrate on the pin portion, often causing damage, but this problem can be avoided.

[0032] According to this embodiment, after transporting the cargo N loaded on the platform 2 of the cargo bed 1, the loading mechanism 10 of the cargo bed 1 is rotated by the hydraulic cylinder 14 to raise the loading platform 11 so that it is tilted in a side view (see Figure 5(b)), and then the shielding cover body 30 is rotated by the hydraulic cylinder 37, which opens the front surfaces (shielding surfaces 31, 31) of the mounting parts 20, 20 of the rods 4, 4 (see Figure 6(b)). When the loading mechanism 10 is raised, the cargo N loaded on the platform 2 is guided to the front side where the rods 4, 4 are located, and the cargo N pushes the rods 4, 4 down towards the front side (see Figure 6(c)), removing any obstructions on the front side. This makes it possible to load the cargo N from the stacking space.

[0033] In this embodiment, the rods 4, 4 are rectangular prism-shaped rod members, with rings 40, 40 at their upper ends, and are connected by connecting strings 41, 41 to rings 42, 42 at the upper end of the wall surface 3 of the loading platform 1. These connecting strings 41, 41 allow the rods 4, 4 to be kept near the loading platform 1 even if they are pushed over by the loading operation of the cargo N.

[0034] Furthermore, although the loading platform 1 of this embodiment has open sides, it has protruding locking parts 50, 50 that form a continuous convex shape on both sides of the platform surface 2. The upper end of each of the convex shapes 51 of these protruding locking parts 50, 50 is above the platform surface 2 and above the loading platform 11 of the loading mechanism 10 which is located on the platform surface 2. By providing these protruding locking parts 50, 50, even if cargo N such as logs is loaded into the loading space, it is possible to restrict the logs from rolling in a continuous convex shape. This prevents excessive stress from the cargo on the rods 4, 4 due to transportation or overloading, and makes it possible to provide a more durable and stable loading platform 1.

[0035] Furthermore, protruding locking portions 50, 50 are formed on both sides of the base surface 2, and a mounting portion 20 that supports the rods 4, 4 in an upright position is positioned to protrude outward from the front side of the base surface 2. This configuration prevents the load N from unexpectedly rolling in the loading space of the base surface 2 with the protruding locking portions 50, 50, and prevents pressure and stress from the load N from being applied to the rods 4, 4 by positioning them outside the base surface 2. On the other hand, since the rods 4, 4 are intended to prevent the load N from unexpectedly falling out of the loading space, it is preferable that the back sides of the rods 4, 4 be aligned with the front side edge of the base surface 2. [Explanation of symbols]

[0036] 1...cargo bed, 2...platform, 3...wall, 4...rod-shaped body 10...Discharge mechanism, 11...Discharge platform surface, 12...Discharge wall surface, 13...Rotating shaft, 14... Hydraulic cylinder (extension / movement part), 20... Mounting section, 21... Mounting base, 22... Mounting support surface, 30...shielding cover body, 31...shielding surface, 32...cover main body, 32a...tip, 32b...Central part, 32c...Base end, 34...Rotation axis, 35...Slotted hole, 36...Support axis 37... Hydraulic cylinder (extension / movement part), 40... Ring, 41... Connecting string, 42... Ring, 50...locking protrusion, 51...convex shape, N... luggage

Claims

1. A loading platform comprising a base surface having a predetermined area, a wall surface standing upright at the rear of the base surface, and a rod-shaped body standing upright at the front surface opposite the wall surface, The aforementioned cargo bed has a mounting section on which the rod body is placed in an upright position, a mounting support surface that surrounds the mounting section while having an open surface that leaves one side open, and a shielding cover body having a shielding surface that can be opened and closed to shield the open surface. The aforementioned shielding cover is rotatably connected to a rotating shaft located below the base surface, and rotates to open the shielding surface, characterized in that the load-carrying structure is such that the shielding cover is rotatably connected to a rotating shaft located below the base surface.

2. The cargo bed structure according to claim 1, characterized in that it has a cover body portion which converts the forward and backward movement of an extendable and retractable part located below the platform surface into rotational movement by the rotation axis of the shielding cover body.

3. The cargo bed has a discharge mechanism for discharging cargo loaded on the cargo bed, which has at least a discharge surface on its surface, and a locking projection having a convex shape extending upward from the surface. The cargo bed structure according to claim 2, characterized in that the apex of the convex shape of the locking projection is located above the discharge surface.

4. The loading platform structure according to claim 3, characterized in that the mounting portion for supporting the rod body is positioned to protrude outward from the platform surface.

5. The discharge mechanism has a discharge platform that follows the table surface and a discharge wall that follows the wall surface, and the front portion of the discharge platform is pivotally supported on a rotation axis, causing it to rotate and stand upright so that the discharge platform is tilted when viewed from the side. The loading platform structure according to claim 3 or 4, characterized in that the discharge mechanism is located in the center of the platform and has a width from left to right and a width from front to back that is shorter than the platform.

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