KR20210033188A - Pallet for carrying coil - Google Patents

Abstract

The present invention relates to a pallet used to transport a coiled heavy object and, more specifically, a pallet which can be loaded into or unloaded from a low-floor trailer. The pallet includes a multistage loading stage including a lower loading stage and an upper loading stage, and access to an internal loading space of the lower loading stage can be controlled as a heavy object support part is operated to be opened and closed in a partial area of the upper loading stage. According to the present invention, the pallet for coil transportation can maximize the loading capacity through a multistage loading stage structure including a lower loading stage and an upper loading stage while achieving excellent workability related with the loading and unloading of coils by having a structure enabling convenient access to each multistage loading stage through loading and unloading operations of coils, and also, the pallet itself can be easily mounted on a transportation vehicle such as a loading platform-less low-floor trailer so as to have a low center, and can promote driving stability through the low-center mounted state, thus significantly reducing time and personnel required for land transportation shipment procedures as well as loading and unloading work for coils in general.

Description

Pallet for carrying coils{PALLET FOR CARRYING COIL}

The present invention relates to a pallet used for transporting heavy objects wound in a coil form, such as a metal sheet or wire rod, and more particularly to a pallet that can be loaded and unloaded on a low-profile trailer.

Generally, it is a heavy object wound in the form of a coil manufactured in a steel mill, and when metal sheets or wires are transported by land, they are transported from the manufacturer's warehouse to the inspection center, then transported to the transport company's dump, or directly transported to the final customer. It goes through a long-distance transport process. Therefore, the above ground transport and unloading process involves loading and unloading the coil onto the vehicle.Because the loading and unloading of the coil having a large volume and weight is performed in individual coil units using a large-sized dedicated crane, The loading and unloading of the coil is generally scheduled to take a certain amount of time. Meanwhile, in order to prevent the loaded coil from falling while the vehicle is running, the coil must be strapped into the vehicle after loading and, conversely, the strap must be disassembled before unloading.Therefore, the time and manpower required for loading and unloading the coil are significantly increased. There is an increasing problem.

It is an object of the present invention to have a large loading capacity, excellent workability related to loading and unloading of a coil, and having a structure suitable for mounting on a transport vehicle, thereby significantly reducing the time and manpower required for loading and unloading the coil. It is to provide a pallet for transporting coils that can be used.

In the process of researching and developing a pallet for transporting coils related to the above problem, the inventors, etc., contemplated a method of mounting the pallet on which the coil is loaded on the transport vehicle when transporting the vehicle of the coil. It has a structure suitable to be mounted, and has multiple loading stages in consideration of the vehicle and loading space of the low-profile trailer, while achieving maximum loading capacity, and accessibility to each of the multiple loading stages using the loading and unloading operation of the coil. The present invention was reached by devising a pallet having a convenient structure and further specifying the mechanical design for the detailed component elements constituting the pallet. The subject matter of the present invention based on this knowledge and focus is the same as described in the claims below.

A pallet according to the present invention is a pallet for transporting a heavy object in the form of a coil, wherein the pallet includes a lower loading end; And an upper loading stage; and the internal loading space of the lower loading stage may be characterized in that access can be controlled by opening and closing the heavy object support in a partial area of the upper loading stage. .

The upper loading end may include a trigger loading end having a structure in which a heavy object support is always deployed; And an open/closed loading end having a structure in which a heavy object support part is selectively opened and closed according to loading or unloading of a heavy object at the trigger loading end, and controlling the opening/closing operation of the open/closed loading end according to a relative position of the trigger loading end. It may further include a power transmission unit.

The trigger loading end may be allocated to an intermediate region in the longitudinal direction of the upper loading end, and the open/closed loading end may be provided symmetrically in the front and rear regions along the longitudinal direction.

Further comprising an elastic member for elastically supporting the trigger loading end with respect to the lower loading end, wherein the trigger loading end is supported by the lower loading end, and the load or elasticity of the heavy object according to the loading or unloading of the heavy object It may be elevated in a predetermined range by the restoring force of the member.

The heavy object support portion of the retractable loading end may include an outer support portion fixed in a state inclined at a predetermined angle in an outward direction; And an inner support that can be rotated and deployed in an inward direction from the outer support, and the inner support of the retractable loading end may be selectively opened and closed according to loading or unloading of a heavy object at the trigger loading end. .

The power transmission unit may be a gearbox.

The gearbox includes a rack gear for transmitting a linear motion of a trigger loading end; A pinion input gear for converting the linear motion of the rack gear into a rotational motion; And an output gear for inducing an opening/closing operation of the open/closed loading end according to the rotational motion of the input gear.

It may be a reduction gear in which a gear ratio of the input gear to the output gear is less than 1.

The gearbox may further include a planetary gear provided between the input gear and the output gear to match the rotational directions of both.

A plurality of guide shafts provided at the lower end of the trigger loading end and slid in and out of the lower loading end in a state in which the elastic member is inserted and mounted, and the guide shaft may guide the lifting operation of the trigger loading end. have.

The cassette may be mounted on a low-profile trailer without a loading platform.

The longitudinal side of the lower loading end may be provided with an insertion hole for mounting the cassette to the low-profile trailer.

Each width of the lower loading end and the upper loading end has a size corresponding to the width of the lower space and the upper space of the low-floor trailer, but the weight is loaded in one row at the lower loading end and in two rows at the upper loading end. It may be one that can be loaded and loaded with a maximum loading capacity.

According to the pallet for conveying coils of the present invention, the loading capacity can be maximized through the multi-stage loading stage structure including the lower loading stage and the upper loading stage, and at the same time, the loading and unloading operations of the coils are used for each of the multi-stage loading stages. With a structure that is easy to access, it has excellent workability related to loading and unloading of coils. Also, these pallets can be easily mounted to have a low center of gravity in a transport vehicle such as a low-floor trailer without a loading platform, and through a low center of gravity mounted state. Since operation stability can be promoted, it is possible to significantly reduce the time and manpower required for the loading and unloading operation of the coil as well as the land transport and unloading process as a whole.

1 is a perspective view of a pallet (hereinafter referred to as'empty pallet') in a state in which a coil is not loaded according to an embodiment of the present invention.
Figure 2 is a perspective view of a pallet (hereinafter referred to as'full pallet') in a state in which a coil is loaded according to an embodiment of the present invention.
3 is a front view of the empty pallet and the full pallet.
Figure 4 is a side view of the empty pallet and the full pallet.
Figure 5 is an explanatory diagram for the operation of the pallet stacking stage according to an embodiment of the present invention.
6 is a flow chart for a coil loading process using a pallet according to an embodiment of the present invention.
7 is an explanatory diagram illustrating a process of mounting a pallet on a transport vehicle according to an embodiment of the present invention.
8 is an operation diagram of a pallet according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail through examples. Prior to this, terms or words used in the specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors appropriately explain the concept of terms in order to explain their own invention in the best way. Based on the principle that it can be defined, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention. Therefore, the configuration of the embodiments described in the present specification is only one of the most preferred embodiments of the present invention, and does not represent all the technical spirit of the present invention, and various equivalents that can replace them at the time of filing of the present invention It should be understood that there may be variations and variations. On the other hand, in the drawings, the same or similar reference numbers are given to the same or equivalent material, and in the entire specification, when a certain part "includes" a certain component, this means that other components are not specifically stated to the contrary. It does not exclude excluding, but means that other components may be further included.

Terms used in this specification are defined as follows for convenience in order to avoid confusion. The pallet for conveying coils according to the present invention is abbreviated as “pallet”, and as an example to which such a pallet is applied, a heavy object wound in a coil shape such as a metal sheet or wire is represented as “coil” or “heavy weight”. Regarding the operation of loading and unloading the coil, the pallet for coil transportation is referred to as “loading” and “unloading”, and for the transport vehicle, it is referred to as “loading” and “unloading”. In the latter case, it includes the case made through a pallet. Regarding the operation of loading and unloading pallets on a vehicle, it is referred to as “mount” or “unmount” for transport vehicles. The pallet loaded with coils is referred to as "full pallet", and the pallet with unloaded coil is referred to as "empty pallet". The width of the palette corresponds to "width", and the height corresponds to "length". In each of the multi-stage loading stages, “support” and “heavy weight support” can be used interchangeably.

First, the structure and operation contents of the pallet 1 and its component elements according to an embodiment of the present invention will be described. 1 and 2 are perspective views of each of an empty pallet and a full pallet according to an embodiment of the present invention, FIG. 3 is a front view of the empty and full pallets, FIG. 4 is a side view of the empty and full pallets, and FIG. 5 is a pallet (1) Each of the diagrams showing the operation process of the multi-stage loading stage is shown.

The pallet (1) is a pallet (1) for transporting a heavy object in the form of a coil, and the stage on which the coil is loaded is formed in multiple stages. In the embodiment, such a multi-stage loading stage is illustrated as two stages of the lower loading stage 10 and the upper loading stage 20. The pallet 1 is intended to be mounted directly on a low-floor trailer 8 without a loading platform. In order to increase the possibility of utilizing the pallet (1), the storage space of the low-profile trailer (8) should be fully utilized to secure sufficient loading capacity, and the center of gravity should be located at the lowest possible position in the mounted state, so that the driving stability of the vehicle should be considered. do.

In this aspect, the width of each of the lower loading end 10 and the upper loading end 20 is to have a size corresponding to the width of the lower space and the upper space, which are'C'-type storage spaces of the low-profile trailer 8. desirable. Specifically, as will be described later, the lower space of the'C'-type loading space of the low-profile trailer 8 requires installation space for the wheel 82, the fork 84, and the lifting device (not shown), and other accessories. Therefore, since it has a relatively smaller width than the upper space, it is exemplified that heavy objects are loaded in one row at the lower loading end 10 and in two rows at the upper loading end 20 so that they can be loaded with the maximum loading capacity in a limited space. Has been.

The lower loading end 10 consists of a first body 12 and a first outer support 14. The first body 12 is exemplified as a frame assembly consisting of a horizontal and vertical transverse, vertically. The vertical crossbar at the bottom constitutes the longitudinal side of the lower loading end 10. An insertion hole 122 for mounting the pallet 1 on the low-profile trailer 8 is provided on the vertical horizontal bar. The insertion hole 122 may be a kind of groove, and the fork 84 of the low-profile trailer 8 is intended to be inserted for a lifting operation upon mounting. The first outer support portion 14 of the lower loading end 10 is a heavy object support portion for preventing the flow and separation of the circular coil, and is exemplified as a plate provided in a pair from the left and right in the width direction in a structure inclined to the outside.

On the other hand, access to the internal loading space of the lower loading end 10 is required during the loading or unloading process of the coil, and this access must be made through the upper side because a crane dedicated to the coil is used. Therefore, for upward access to the inner loading space of the lower loading end 10, as described later, in a state in which the heavy weight support is deployed to form a support in at least a partial area of the upper loading end 20 (that is, the upper side of the lower loading end 20 It must be of a retractable type that can be switched between the closed state) and the initial folded state (i.e., the lower loading end and the upper open state).

The upper loading stage 20 includes a trigger loading stage 210 and an open/closed loading stage 220, and in this case, the pallet 1 is of the open/closed loading stage 220 according to the relative position of the trigger loading stage 210. It further includes a power transmission unit 30 for controlling the opening and closing operation. The relative position of the trigger loading end 210 is determined depending on whether a heavy object is loaded or unloaded thereon. The area allocated to the retractable loading stage 220 is an area allocated as at least a partial area for accessing the lower loading stage 10 among the entire areas of the upper loading stage 20 as described above. In the embodiment, the trigger loading stage 210 is allocated to an intermediate region in the longitudinal direction of the upper loading stage 20, and the retractable loading stage 220 is provided symmetrically in the front and rear regions along the length direction, so that the coil is loaded. The load applied in the state can be made uniform in the entire length direction of the pallet 1, and operation stability for the low-floor trailer 8 can be improved while the pallet 1 is mounted. The heavy weight support at the upper loading end 20 is designed in a structure capable of loading in two rows. That is, a pair of inner support portions are provided between the pair of outer support portions, and the outer support portion and the inner support portion are inclined in opposite directions to form a support, thereby preventing the flow and separation of the coil in each row.

The trigger loading stage 210 serves as a switching function for controlling the opening/closing operation of the open/closed loading stage 220 while providing a position in which a heavy object is loaded. Specifically, the trigger loading end 210 includes a second body 212, a second outer support 214, and a second inner support 216. The second body 212 is illustrated as a lattice-shaped frame assembly consisting of a horizontal and vertical transverse. The second outer support 214 and the second inner support 216 constitute a heavy weight support of the trigger loading end 210. The second outer support 214 is illustrated as a frame installed inclined outwardly from the transverse end of the first body 12, and is provided as a pair in the width direction left and right. The second inner support portions 216 are illustrated to be installed inclined inwardly in the vicinity of the middle region of the loading end, and are provided in pairs at the center in the width direction. The second outer support portion 214 and the second inner support portion 216 of the trigger loading end 210 are integrally installed on the second body 212 and are exemplified in a structure that is always deployed.

The relative position determined according to whether a heavy object is loaded or unloaded on the trigger loading end 210 is a height difference in the vertical direction. That is, the trigger loading stage 210 is manufactured as a separate component and installed in a structure that can be supported so as to be elevated at the upper end of the lower loading stage 10. According to the embodiment, the pallet 1 further includes an elastic member 50 such as an elastic spring 50 to elastically support the trigger loading end 210 at the upper end of the lower loading end 10, The elastic member 50 is installed in a manner that is inserted into the guide shaft 40. The guide shaft 40 is illustrated as being provided in plural at the bottom of the second body 212 of the trigger loading end 210, and through holes formed in the frame constituting the first body 12 of the lower loading end 10 It is installed to be slidable in and out, that is, in the vertical direction. Accordingly, the trigger loading end 210 is lowered by the load when loading a heavy object while being supported by the lower loading end 10 from above, and rises by the restoring force of the elastic member 50 when the heavy object is unloaded. It works. Trigger loading end 210 may be provided with a fixing pin 42 at the lower end of the guide shaft 40 to prevent the upward separation.

The retractable loading stage 220 serves as a passage for upward access to the lower loading stage 10 positioned below the retractable loading stage 220 while providing a position in which heavy objects are loaded. That is, the configuration in which the heavy object support portion of the retractable loading end 220 is provided in an open/closed manner allows the heavy object support part to be opened and closed in a partial area of the upper loading end 20 for access to the internal loading space of the lower loading end 10. It is illustrated as an embodiment of the configuration. Specifically, the retractable loading end 220 includes a third outer support 224 and a third inner support 226. The third outer support 224 is illustrated as a frame installed inclined to the outside in a wing shape from the upper outer edge of the pallet 1, and is provided as a pair from the left and right in the width direction. The frame of the third outer support 224 is exemplified as a structure that is installed integrally with the first body 12 of the lower loading end 10 and is always deployed. The third inner support 226 has a structure capable of being rotated and deployed from the third outer support 224 in an inward direction, and is provided in pairs in the width direction left and right. The third inner support 226 is a plate assembled on a frame arranged in the form of ribs, and it is exemplified that it can be rotated around a rotation shaft 228 installed in the longitudinal direction from the upper outer periphery of the pallet 1 .

The third inner support 226 of the retractable loading end 220 is selectively opened and closed according to the loading or unloading of a heavy object in the trigger loading end 210. That is, a state in which the third inner support 226 is initially folded is open, and in this case, the trigger loading end 210 is in a state in which a heavy object is loaded and lowered. Conversely, the state in which the third inner support part 226 is deployed in the inward direction is in a closed state, and in this case, the trigger loading end 210 is in a state in which the heavy object is unloaded and is raised.

The power transmission unit 30 serves to control the opening and closing operation of the open/closed loading stage 220 according to the relative position of the trigger loading stage 210, as described above, and is illustrated as a gearbox in the embodiment. The gearbox includes a rack gear 32, an input gear 34, and an output gear 38, and may optionally further include a planetary gear 36. The rack gear 32 transmits a linear motion according to the lifting operation of the trigger loading end 210. The linear motion of the rack gear 32 is converted into rotational motion by a pinion, and this pinion is the input gear 34. The rotational motion of the input gear 34 is transmitted to the output gear 38 and thus is controlled by the opening/closing operation of the open/closed loading end 220. The output gear 38 is connected to the rotation shaft 228 constituting the third inner support 226 of the retractable loading end 220. In this case, the gear ratio of the input gear 34 to the output gear 38 is configured in the form of a reduction gear less than 1, so that it is preferable to adjust the amount of rotation with respect to the third inner support 226 and minimize the rotational shock. Meanwhile, the planetary gear 36 is between the input gear 34 and the output gear 38 according to the installation and rotation direction of the third inner support part 226 that can be rotated and deployed among the heavy load support parts of the retractable loading end 220. It may be selectively provided to, and serves to match the rotation directions of the input gear 34 and the output gear 38 as in the embodiment.

Next, the process of loading and unloading the coil using the pallet 1 and the process of loading the pallet 1 on the low-profile trailer 8 will be described.

6 is a flowchart illustrating a coil loading process using a pallet 1 according to an embodiment of the present invention. First, the coil is transported to a place to be loaded using the low-profile trailer 8, unmounted, and placed on the ground (Fig. 6(a)). The trigger loading end 210 is a position raised by the support force of the elastic member 50, and the opening and closing loading end 220 is placed in the initial folded state, so that the upper side of the lower loading end 10 Is in an open state. Next, the coil is held in individual units using a dedicated crane (not shown), and the coil is loaded into the lower loading end 10 of the pallet 1 (Fig. 6(b)). Subsequently, after the coil loading is completed in the lower loading end 10, the coil is loaded into the trigger loading end 210 (Fig. 6(c)). Accordingly, the trigger loading end 210 is placed in a lowered position, and the third inner support 226 of the open/closed loading end 220 rotates and expands inward to form a support. In this case, the power transmission unit 30 is operated between the lowering operation of the trigger loading end 210 and the rotation of the third inner support 226 of the opening/closing loading end 220. Specifically, in the power transmission unit 30 in the form of a gearbox, a gear ratio between the pinion (input gear 34) and the output gear 38 is provided in the form of a reduction gear of <1, and the gear ratio is 1 at the front end of the output gear 38 The rotation direction becomes the same as that of the pinion (input gear 34) by providing the moving gear of. That is, as the trigger loading end 210 descends by the loaded coil load, the rack gear 32 descends to sequentially rotate the pinion, the floating gear, and the output gear 38 inward, outward and inward, respectively, and accordingly The third inner support 226 of the retractable loading end 220 with the central axis of the output gear 38 as the rotational shaft 228 is also developed inwardly, and the support of the retractable loading end 220 together with the third outer support 224 That is, to form a heavy weight support. Finally, the entire loading process is completed by loading the coil into the retractable loading end 220 (Fig. 6(d)). Coring's unloading process proceeds in the reverse order. That is, the unloading process for the coil is performed in the order of the retractable loading stage 220, the trigger loading stage 210, and the lower loading stage 10. In this case, the retractable loading stage 220 is in a closed state until the trigger loading stage 210 is unloaded. The power transmission unit 30 is operated even between the raising operation of the trigger loading stage 210 and the rotational operation of the third inner support 226 of the open/closed loading stage 220. Specifically, as the trigger loading end 210 rises by the restoring force of the elastic member 50 in a state in which the coil load is removed, the rack gear 32 rises to move the pinion, the floating gear, and the output gear 38 to the outside. , The second inner support 216 of the retractable loading end 220, which is sequentially rotated to each of the inner and outer sides, and thus the central axis of the output gear 38 as the rotation shaft 228, is also folded outwardly through the open upper portion. Upward access to the lower loading end 10 becomes possible.

7 shows an explanatory diagram for a process of mounting the pallet 1 according to an embodiment of the present invention to a transport vehicle. When the pallet 1 of the present invention is applied to a transport vehicle, this transport vehicle is particularly characterized as a low-floor trailer 8 without a loading platform. When viewed from the top of the low-profile trailer 8, it has a'c' shape because there is no floor loading platform, and the wheels 82, forks 84, and lifting devices (not shown in the drawing) are located on both sides inside the lower space of the'c'-type loading space. Si), the same component elements are installed. The fork 84 inserted into the insertion hole provided in the lower loading part of the pallet is raised and lowered by the lifting device. The lifting method may be an indirect method of adjusting the height of the wheel 82 as illustrated in the drawing, or may be a direct method of adjusting the height of the fork 84 itself. Loading the coil onto the vehicle involves loading the coils onto the empty pallets sequentially using a dedicated crane while the empty pallets transported by the low-profile trailer (8) are unmounted on the ground, and then the full pallet is loaded onto the low-profile trailer ( Proceed with the method of mounting on 8). To unload the coil from the vehicle, the full pallet transported by the low-profile trailer 8 is unmounted on the ground, and the coil is sequentially unloaded from the full pallet using a crane, and then the empty pallet is transferred to the low-profile trailer ( Proceed with the method of mounting on 8).

As described above, according to the pallet 1 for conveying the coil of the present invention, the loading capacity can be maximized through the multi-stage loading stage structure including the lower loading stage 10 and the upper loading stage 20, and at the same time loading of the coil. And it has a convenient structure for easy access to each of the multi-stage loading stages using the unloading operation, so that the workability related to loading and unloading of the coil is excellent, and the pallet (1) itself is similar to the low-floor trailer (8) without a loading platform. Since the vehicle can be easily mounted to have a low center of gravity, and operation stability can be promoted through a low center of gravity mounted state, it is possible to significantly reduce the time and manpower required for land transport and unloading as well as loading and unloading of the coil as a whole. have.

The above description relates to specific embodiments of the present invention. As described above, the above embodiments according to the present invention are disclosed for purposes of explanation and are not understood to limit the scope of the present invention, and those of ordinary skill in the art will not depart from the essence of the present invention. No, it should be understood that various changes and modifications are possible.

For example, a coil having a circular cross section is exemplified as an article loaded on the pallet 1, but it can be applied to other high weight and high volume articles having an outer or cross-sectional shape. In this case, the cross-sectional profile for the weight support at each of the loading ends may be changed according to the loaded article.

In addition, the multi-stage loading stage may be two or more stages. In this case, the possibility of access to the lower loading end can be controlled by applying the above-described opening and closing method for the upper loading end 20 to the upper loading end as it is.

In addition, although it has been illustrated that a part of the upper loading end 20 (open/closed loading end 220) can be opened or closed, the entire area including the trigger loading end 210 may be opened and closed.

In addition, the area in which the trigger loading stage 210 and the open/closed loading stage 220 are allocated in the longitudinal direction of the upper loading stage 20 is not limited.

In addition, the elastic spring 50 exemplified as the elastic member 50 is not limited, and may be replaced with another member having elastic force.

In addition, the body and the heavy weight support part constituting each loading end may be provided in various forms by a frame or a plate or a combination thereof.

In addition, the retractable loading end 220 is illustrated that only the third inner support part 226 of the third outer support part 224 and the third inner support part 226 constituting the heavy weight support part can be rotated and deployed. As shown, the third outer support 224 ′ may also have a structure that can be rotated and deployed together with the third inner support 226.

Accordingly, all such modifications and changes may be understood to correspond to the scope of the invention disclosed in the appended claims or their equivalents.

1: pallet for conveying coils
10: lower loading end
12: first body
122: insertion port
14: first outer support
20: upper loading end
210: trigger loading end
212: second body
214: second outer support
216: second inner support
220: retractable loading end
224, 224': third outer support
226': third inner support
228: axis of rotation
30: power transmission unit
32: rack gear
34: pinion (input gear)
36: planetary gear
38: output gear
40: guide shaft
42: fixing pin
50: elastic member (elastic spring)
8: low-profile trailer
82: wheel
84: fork

Claims (13)

As a pallet for transporting heavy goods in the form of a coil,
The pallet has a lower loading end; And an upper loading stage; and a multi-stage loading stage including,
A pallet, characterized in that the access to the inner loading space of the lower loading end can be controlled by opening/closing the heavy object support in a partial area of the upper loading end.
The method of claim 1,
The upper loading end may include a trigger loading end having a structure in which a heavy object support is always deployed; And an open/closed loading end having a structure in which a heavy weight support part is selectively opened and closed according to loading or unloading of a heavy object at the trigger loading end; and
A pallet, characterized in that it further comprises a power transmission unit for controlling the opening and closing operation of the opening and closing type loading stage according to the relative position of the trigger loading stage.
The method of claim 2,
The trigger loading stage is allocated to an intermediate region in the longitudinal direction of the upper loading stage, and the open/closed loading stage is symmetrically provided in the front and rear regions along the longitudinal direction.
The method of claim 2,
Further comprising an elastic member for elastically supporting the trigger loading end with respect to the lower loading end, wherein the trigger loading end is a load or elastic member of a heavy object according to loading or unloading of a heavy object in a state supported by the lower loading end A pallet, characterized in that it is elevated in a predetermined range by the restoring force of.
The method of claim 2,
The heavy object support portion of the retractable loading end, the outer support portion fixed in a state inclined at a predetermined angle in the outer direction; And an inner support that can be deployed by rotating in an inward direction from the outer support,
A pallet, characterized in that the inner support portion of the retractable loading end is selectively opened and closed according to the loading or unloading of a heavy object at the trigger loading end.
6. The pallet according to claim 2, 4 or 5, wherein the power transmission unit is a gearbox.
According to claim 6, The gear box is a rack gear for transmitting the linear motion of the trigger loading end; A pinion input gear for converting the linear motion of the rack gear into a rotational motion; And an output gear for inducing an opening/closing operation of the open/closed loading end according to the rotational motion of the input gear.
8. The pallet according to claim 7, wherein the gear ratio of the input gear to the output gear is a reduction gear less than one.
The pallet according to claim 7, wherein the gearbox further comprises a planetary gear provided between the input gear and the output gear to match the rotational directions of both.
The method of claim 4, further comprising a plurality of guide shafts provided at a lower end of the trigger loading end and sliding in and out of the lower loading end in a state in which the elastic member is inserted and mounted, wherein the guide shaft lifts and lowers the trigger loading end. Palette, characterized in that to guide the operation.
The pallet according to claim 1, wherein the pallet is mounted on a low-profile trailer without a loading platform.
The pallet according to claim 11, wherein an insertion hole for mounting the pallet to the low-profile trailer is provided at the longitudinal side of the lower loading end.
The method of claim 11, wherein each width of the lower loading end and the upper loading end has a size corresponding to the width of the lower space and the upper space of the low-floor trailer, and the weight is loaded in one row at the lower loading end, and the A pallet, characterized in that it can be loaded in two rows at the upper loading end and loaded with a maximum loading capacity.

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