KR20150027488A - Design method for foldable container hinge system - Google Patents

Abstract

The present invention relates to a hinge system designing method for a side wall of a foldable container, which includes: rotary cams (610) placed on both sides thereof; sliding cams (620) placed inside the rotary cams (610) respectively; and compression springs (630) placed inside the sliding cams respectively. As the sliding cam relatively rotates to the rotary cam, the compression spring is compressed and the side wall of the container is folded. A rotational section of the sliding cam is composed of a plurality of sections. Spring coefficients of the compression springs are set such that the initial section and the final section are rotated by an external torque, and sections between the initial section and the final section are rotated by a self-weight of the side wall in the container. Therefore, the hinge system to fold a side wall of a container can facilitate folding motions by applying cams and springs using the elasticity of the springs, and can solve safety problems due to abrupt folding motions during a folding motion process by proceeding the side wall folding process associated with spring compression in stages.

Description

TECHNICAL FIELD [0001] The present invention relates to a foldable container hinge system,

The present invention relates to a method of designing a spring of a hinge system used in a foldable container, and more particularly, to a method of designing a spring of a hinge system, which is mounted on a side wall of a foldable container and is mounted on a hinge system, So that the side wall of the container can be easily folded.

In general, a container is a large box formed of a steel plate, which is mainly used for freight transportation using a truck or a ship. It is well known that such a container is widely used because it has a size with a certain size and is easy to transport and has an advantage of protecting the cargo contained therein.

Such containers are either transported individually by large freight vehicles which are used exclusively, or transported in large quantities by dedicated trains or dedicated vessels.

At this time, the container must return to the departure place after loading the cargo into the predetermined area after returning the cargo. However, even in the empty container state, the container itself occupies the same space, .

In order to solve this problem, there has been attempted a technique of transporting an empty container by folding a container to reduce its volume, and then stacking several containers vertically and transporting them at a time.

1 and 2 show an example of the shape disclosed in Patent Document 10-1064803. FIG. 1 is an external perspective view of a foldable container, and FIG. 2 illustrates a method of folding container side walls using a belt.

In the conventional technique, the side wall of the container is divided into a plurality of portions and then connected to each other by a hinge. In order to fold the side wall, a belt 220 is attached to both side walls, A method of folding the container by moving it to the inside of the container is used.

However, this method has a problem that a belt for folding the container must be separately attached, and the spring provided at the center of the side wall serves as a simple hinge, but the elastic force stored in the spring can not be utilized in the folding process.

In addition, in the related art, when the side wall is folded by winding the belt, a sudden folding operation is performed, thereby posing a problem of safety for workers working inside or around the container.

The present invention provides a hinge system capable of easily folding a side wall of a folding container. More specifically, by using a spring and a hinge system using a spring, a spring force of the spring is utilized, And to provide a hinge system.

It is another object of the present invention to solve the safety problem due to the sudden folding operation during the folding operation by making the sidewall folding process of the container connected with the spring compression stepwise.

It is another object of the present invention to provide a folding device that can easily perform a folding operation by appropriately using a spring elasticity modulus so that when external power is applied at the initial stage of folding operation, .

The present invention is characterized by comprising a rotary cam 610 provided on both sides, a sliding cam 620 provided inside the rotary cam 610, and a compression spring 630 provided inside the sliding cam, Wherein the sliding cam is rotated relative to the rotary cam such that the compression spring is compressed to thereby fold the side wall of the container, wherein the relative rotation section of the sliding cam comprises a plurality of sections , The first section and the last section are rotated by the external torque, and the section between the first section and the final section is rotated by the self weight of the container side wall, and the spring coefficient of the compression spring is set. Provides a system design method.

It is preferable that the spring coefficient causes a torque value to change linearly with the rotation angle of the sliding cam, and the sliding cam rotates 90 degrees relative to the rotary cam in the container folding process.

The rotary cam 610 is formed in a circumferential direction and protrudes in one longitudinal direction and has a first crest portion 616 and a first crest portion 618 and a first crest portion 616 and a first crest portion 618 The sliding cam 620 is formed in a circumferential direction so as to protrude toward the rotary cam and has a first inclined portion 617 and a second inclined portion 617. The second inclined portion 617 has a first inclined portion 617, And a second cam portion 625 having a top portion 628 and a second inclined portion 627 connecting the second trough portion and the second top portion.

Wherein the sliding cam is mounted on a side wall of the container and has a groove (623) for guiding a linear movement while restricting the rotational motion with respect to the side wall, and the sliding cam rotates relative to the rotary cam The second top portion 628 of the sliding cam 620 moves to the first top portion 618 through the first inclined surface 617 of the rotary cam 610 so that the spring is compressed.

The hinge system for side wall contact of a container according to the present invention utilizes the elastic force of a spring by applying a cam and a spring,

Further, the present invention has an advantageous effect of solving the safety problem due to the sudden folding operation in the folding operation process by making the sidewall folding process of the container connected with the spring compression stepwise,

Further, according to the present invention, since the spring elasticity modulus is appropriately used, the folding operation can be performed by itself without any external power at a certain interval after the initial folding operation, and the folding operation can be conveniently performed.

1 is an external perspective view of a folding container according to the prior art,
2 is a side view showing a folding manner of the container according to the prior art,
FIG. 3 is a side view showing a folding process of the side wall of the folding container according to the present invention,
4 is a hinge system provided on the side wall of the folding container according to the present invention,
5 is a side view of the hinge system according to the present invention,
FIG. 6 is a side view of the hinge system according to the present invention,
7 is a side wall folded state of the hinge system according to the present invention,
FIG. 8 is a graph showing angles of the torque according to the spring constant and the torque due to the weight of the container of the hinge system according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Wherein like reference numerals refer to like elements throughout.

3 is a side view showing a folding process of the side wall of the folding container according to the present invention. 3 shows a shape of a cross section perpendicular to the longitudinal direction of the container.

The foldable container 500 according to the present invention includes a top plate 510 and a bottom plate 520 and side walls 530 and 540 vertically installed on both sides between the top plate and the bottom plate. As shown in Fig. The side walls are divided into upper and lower portions at approximately the center, and are divided into an upper wall 530 and a lower wall 540, and a folding member 550 is provided between the upper and lower walls 530 and 540 to connect the upper and lower walls 530 and 540 using a hinge. An upper connecting member 560 for connecting the upper side wall 530 to the upper plate using a hinge and a lower connecting member 570 for connecting the lower side wall 540 to the lower plate by using a hinge are also provided .

3 (A) shows a state in which the side wall of the folding container according to the present invention is completely opened (hereinafter, this state will be referred to as a standing state), (B) and (C) (Hereinafter, this state is referred to as an " operating state "), and (D) shows a state in which the side wall of the folding container according to the present invention is completely folded Quot; folded state ").

3 (D) when the inside of the container is empty after the cargo of the container is transported, and the transportation cost can be reduced by stacking and storing or transporting the plurality of containers.

The upper connecting member 560 and the upper side wall 530 and the lower connecting member 570 and the lower wall 540. The upper wall 530 and the folding member 550 and the lower wall 540 and the folding member 550 FIG. 4 is an exploded perspective view of a hinge system provided on a side wall of a folding container according to the present invention. Referring to FIG. The hinge system of the present invention includes an upper connecting member 560 and an upper side wall 530 of the container, a lower connecting member 570 and a lower wall 540, an upper wall 530, a folding member 550, The upper part of the side wall 530 and the folding member 550 and the lower wall 540 and between the folding member 550 and the folding member 550, As shown in FIG.

The hinge system 600 according to the present invention employs a cam and a compression spring type. Specifically, the hinge system 600 includes a rotary cam 610 provided at both ends in the longitudinal direction, a sliding cam 610 provided inside the rotary cam 610, A compression spring 630 provided inside the sliding cams on both sides, a shaft member 640 inserted into the sliding cams in the longitudinal direction, and a washer 650 for preventing the shaft member from coming off.

The rotary cam 610 is attached to the folding member 550 and fixed to the rotary cam 610. The rotary cam 610 has a cylindrical fixing portion having a fixed thickness in the longitudinal direction and formed with a coupling groove 612, And a first cam portion 615 formed in the direction of the arrows. The first cam portion 615 is formed in a wavy pattern in the circumferential direction and includes a first rib portion 616, a first ridge portion 618, and a first rib portion 618 connecting the first rib portion 616 and the first ridge portion 618 1 inclined portion 617 as shown in Fig. A coupling hole 612 is formed in the rotary cam for engaging with the folding member using a suitable coupling member such as a bolt or a screw.

The sliding cam 620 is a member that can rotate and linearly move relative to the rotary cam, and is attached to the side wall 530 or 540. That is, while the sliding cam 620 is attached to the side wall, rotational motion (an operation of rotating the longitudinal direction of the hinge system about the rotation axis) is restricted, but linear motion (linear motion in the longitudinal direction of the hinge system) Do not. In the sliding cam 620, grooves 623 are formed in the longitudinal direction so that relative rotation is restricted in relation to the side wall of the container, but linear movement is allowed. The sliding cam 620 has a second cam portion 625 engaged with the first cam portion of the rotary cam. The second cam portion 625 has a wavy pattern in the circumferential direction and includes a second skeleton portion 626, a second top portion 628, and a second slope portion 627 connecting the second skeleton portion and the second top portion. Respectively.

A compression spring 630 is disposed inside the two sliding cams 620. When the sliding cam 620 linearly moves and comes close to each other, the spring compresses and presses the sliding cam.

Hereinafter, a process of folding the foldable container using the hinge system 600 according to the present invention will be described. In the following description, the folding member, the upper side wall and the lower side wall will be described as examples of the folding operation of the container side wall.

Fig. 5 is a view of the container side wall standing up state according to the present invention, Fig. 5 (a) is a partial view of the hinge system in the standing state, and Fig. 5 (b) is a view of the standing side wall.

The upper hinge system 600 connects the upper side wall 530 of the container with the folding member 550 and the lower hinge system 600 connects The lower wall 540 of the container and the folding member 550 are connected to each other (for convenience, the upper side wall and the folding member disposed on the left side are omitted).

The rotary cam 610 of the upper hinge system is attached and fixed to the folding member 550 and the sliding cam 620 of the upper hinge system is attached to the upper side wall 530. The rotary cam 610 of the lower hinge system is attached and fixed to the folding member 550 and the sliding cam 620 of the lower hinge system is attached to the lower wall 530.

In this state, the top portion of the first cam portion 615 of the rotary cam and the second cam portion 625 of the sliding cam 620 are engaged with each other at the top portion and the bottom portion of the sliding cam 620 to maintain the state shown in Fig. 5 (a).

When the side wall is folded by applying an external force in the stand-up state of Fig. 5, the upper wall and the lower wall are rotated with respect to the folding member. This process will be explained using the lower hinge system in the figure.

The rotary cam 610 of the hinge system 600 is in a fixed state because it is attached to the folding member 550 and the lower wall 540 is relatively rotated when the folding member is fixed, The cam 620 is rotated along the lower wall 530. 6 shows a state in which the lower wall 530 is rotated by about 45 degrees with respect to the folding member 550. As shown in Fig.

The second top portion 628 of the second cam portion 625 of the sliding cam 620 passes through the first inclined surface 617 of the first cam portion 615 of the rotary cam 610, 618. At the same time, both of the two second cam portions 625 are closest to the shortest distance, and the spring 630 is in the fully compressed state.

In the state of FIG. 5, the sliding cam 620 is pressed outward by the spring.

5, when the second top 628 of the sliding cam 620 passes over the first top 618 of the rotary cam 610, the sliding cam linearly moves by the compression force of the spring The second top portion 628 of the sliding cam 620 reaches the first trough portion 616 through the first inclined surface 617 opposite to the rotary cam 610. Then, the sliding cam is rotated by 90 ° with respect to the rotary cam, so that the lower side surface 540 is rotated by 90 ° with respect to the folding member 550. Since the upper hinge system of the figure is subjected to the same process, the upper wall and the lower wall are rotated 180 ° to each other to be completely folded (FIG. 7).

That is, FIG. 7 shows a state in which the side wall is rotated and folded in the same direction in the standing state, and in comparison with FIG. 5, the second top portion of the sliding cam has moved from the first to third adjacent portions of the rotary cam. The rotary cams and the sliding cams are formed with four osseous portions and one top portion, respectively, and one top portion and a neighboring top portion form an angle of 90 °.

The process of bringing the side wall from the folded state to the standing state proceeds through the operation opposite to the above-described process, so a detailed description thereof will be omitted.

FIG. 8 is a graph showing angles of the torque according to the spring constant and the torque due to the weight of the container of the hinge system according to the present invention.

The graph of FIG. 8 is a graph for determining the spring constant of the compression spring 630 in the process of rotating the lower wall 540 of FIG. 5 to FIG. 7 by 90 ° in relation to the folding member 550 .

8, when the lower wall 540 changes the relative angle of the folding member 550 from 0 ° to 90 °, the torque graph X due to the spring constant and the torque generated by the self- Graph (Y) is shown.

In the graph, the torque-related torque relationship in the process of folding the container side wall is divided into three sections, A-B section, B-C section and C-D section.

AB section is the process of starting the folding operation of the container side wall. In this section, additional torque corresponding to the difference between the torque graph (X) due to the spring constant and the torque graph (Y) Do. That is, torque must be provided by external power to start the folding operation.

B-C section is a section where the self-weight torque value is larger than the spring torque value, so that the folding operation is performed automatically by self-weight even if there is no external torque.

The C-D section is a process in which the folding operation is completed. In this section, an additional torque corresponding to the difference between the torque graph (X) due to the spring constant and the torque graph (Y) caused by the container self weight is required. In other words, additional external force is required to fully fold.

The hinge system of the present invention uses a linear spring in which the torque-rotation angle diagram by the spring constant is a straight line and forms the torque-rotation angle diagram generated by the self weight of the container as shown in FIG. 8, The state in which the power (torque) is required can be made necessary only at the beginning of the folding operation and at the finishing. That is, when an external force equal to the difference from the torque due to the spring constant is applied in the first initial period of the folding operation, the folding operation is automatically performed by the weight of the container thereafter. Thereafter, an external force (torque) may be applied only in the last predetermined period of the folding operation so as to be brought into the folded state.

Therefore, the present invention is convenient because it is not necessary to continuously apply an external force in the section where the folding operation is performed, and it is convenient to perform the folding operation when a necessary force is applied only in the first and last stage. In addition, if an external force is applied in the initial operation of the folding, if the folding operation is performed suddenly at once, unexpected safety accidents may occur. That is, there is a possibility that a person or a cargo may exist inside the container in the folding process. In this case, even if the folding operation is stopped and the external power is exerted at the last certain period, the folding operation is performed completely, Can be prevented.

500: folding container 510: top plate
520: lower plate 530: upper side wall
540: lower side wall 550:
600: hinge system 610: rotary cam
615: first cam portion 620: sliding cam
625: second cam portion 630: compression spring
640:

Claims (5)

A sliding cam 620 disposed inside the rotary cam 610, and a compression spring 630 disposed inside the sliding cam 630. The sliding cam 630 is provided on the inner side of the rotary cam 610, The compression spring being compressed as the container is rotated relative to the rotary cam to fold the side wall of the container, the hinge system design method comprising:
Wherein the relative rotation section of the sliding cam comprises a plurality of sections,
The first section and the last section are rotated by the external torque,
The section between the first section and the last section is rotated by the self weight of the container side wall,
Wherein a spring coefficient of the compression spring is set.
2. The method according to claim 1,
Wherein a torque value according to a rotation angle of the sliding cam linearly changes.
The method according to claim 1,
Wherein the sliding cam is rotated 90 relative to the rotary cam during the container folding process.
3. The method of claim 2,
The rotary cam 610,
A first inclined portion 617 and a first inclined portion 617 which extend from the first inclined portion 616 and the first inclined portion 618 to the first inclined portion 616 and the first inclined portion 618, The first cam portion 615 having the first cam portion 615 formed thereon,
The sliding cam (620)
And a second cam portion 626 formed to protrude toward the rotary cam and formed with a second inclined portion 627 connecting the second top portion 628 and the second top portion to the second top portion, (625). ≪ Desc / Clms Page number 24 >
5. The method of claim 4,
Wherein the sliding cam is mounted on a side wall of the container and has a groove (623) for guiding linear motion while restricting rotational motion with respect to the side wall,
As the sliding cam rotates relative to the rotary cam, the second top 628 of the sliding cam 620 passes through the first sloping surface 617 of the rotary cam 610 to the first top 618 And the spring is compressed while moving.

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