CN109562861B

CN109562861B - Loading pallet

Info

Publication number: CN109562861B
Application number: CN201780047875.9A
Authority: CN
Inventors: 许章会
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-08-02
Filing date: 2017-08-02
Publication date: 2020-07-21
Anticipated expiration: 2037-08-02
Also published as: CN109562861A; KR101814053B1; WO2018026195A1

Abstract

The present invention relates to a loading tray, and more particularly, to a loading tray having a connection structure that allows adjacent frames to be connected by a component of a connection bracket, thus ensuring durability, facilitating assembly and disassembly of a frame body, and enabling configuration of various shapes of the frame body. The loading tray according to the present invention has a frame body assembled by connecting frames, wherein the frames have a square section, and adjacent meeting frames have connecting portions connected by coupling connecting brackets.

Description

Loading pallet

Technical Field

The present invention relates to a loading tray, and more particularly, to a loading tray having a coupling structure in which adjacent frames are coupled by an assembly coupling bracket, thereby securing durability, easily assembling and disassembling a frame body, and allowing the frame body to be constructed in various shapes.

Background

Generally, a pallet is used to efficiently transport goods such as parts or products. In order to form a loading space of goods, the pallet is configured such that additional components are coupled to the frame body of the rectangular parallelepiped shape by the connection frame.

For example, in order to effectively utilize the inner space of the frame body formed by connecting the frames, the tray is used in a form in which a member for dividing the frame body into a plurality of layers or a member for preventing the separation of goods during transportation, such as a side protector, is coupled to the frame body.

The pallet should have a structure capable of maintaining strength to support the weight of several tons of goods while reducing the empty load thereof. Therefore, recently, pallets having a frame body composed of a lightweight steel frame or an aluminum frame are widely used.

However, in order to connect the iron frame or the aluminum frame to each other, troublesome welding or riveting is generally used in the assembling operation, and when a damaged portion is generated, the entire pallet needs to be replaced.

Korean patent registration No. 10-1214792 discloses a prefabricated pallet for loading goods. However, the disclosed tray does not have various connection forms such as "bar-shaped connection", "T-shaped connection", and "plus-shaped connection". Thus, the disclosed pallet is limited in design of the size or structure of the frame body.

Disclosure of Invention

Technical problem

Technical scheme

In order to achieve the above object, a loading tray according to the present invention includes a frame main body assembled by connecting frames, wherein the frames have a rectangular section, and the frames gathered adjacent to each other include connection units assembled by coupling connection brackets.

According to the loading tray according to the present invention, the connecting unit includes a T-shaped connecting unit where a pair of T-shaped connecting brackets are located on both surfaces of a part where an end portion of the second frame is located near one side surface of the first frame and gathered in a T shape and covers the part where the first frame and the second frame are gathered such that the first frame and the second frame are connected to each other, wherein each of the T-shaped connecting brackets includes a first tightening part located on one surface of the first frame at the part where the first frame and the second frame are gathered, a second tightening part bent at a right angle at an end edge of the first tightening part, a second side tightening part, and a coupling part, and placed to cover one side surface of a first frame which is opposite to the other side surface of the first frame, the other side surface of the first frame being positioned at a side where an end of a second frame is gathered, a second tightening part being located at a portion on one surface of the second frame, wherein the first frame and the second frame are gathered at the portion, the second side tightening part is bent at a right angle at each edge of the second tightening part, and placed to cover each side surface of the second frame, a coupling part being located between the first tightening part and the second tightening part and having a bolt hole into which a coupling bolt is inserted, and wherein when the pair of T-shaped connection brackets are overlapped at the portion to face each other, the first frame and the second frame are gathered at the portion, and the pair of T-shaped connection brackets are coupled to each other by coupling a coupling nut to the coupling bolt inserted into the bolt hole, the first frame is gripped by the first gripping portion and the first side gripping portion, and the second frame is gripped by the second gripping portion and the second side gripping portion.

Advantageous effects

Due to the above configuration, the loading tray according to the present invention has a connection structure in which adjacent frames are connected by assembling the connection brackets, thereby securing durability, easily assembling and disassembling the frame main body, and allowing the frame main body to be constructed in various shapes.

Drawings

Fig. 1 is a perspective view illustrating a loading tray according to an embodiment of the present invention.

Fig. 2A is a perspective view illustrating the T-shaped connection unit of the loading tray in detail according to the embodiment of the present invention.

Fig. 2B is an exploded perspective view illustrating the T-shaped coupling unit of the loading tray in detail according to the embodiment of the present invention.

Fig. 2C is a perspective view illustrating in detail a T-shaped coupling bracket used in the T-shaped coupling unit of the loading tray according to the embodiment of the present invention.

Fig. 2D is a side view illustrating a T-shaped coupling unit of a loading tray according to an embodiment of the present invention.

Fig. 2E is a front view illustrating a coupled state of the T-shaped connection units of the loading tray according to the embodiment of the present invention.

Fig. 2F is a perspective view illustrating in detail another application example of a T-shaped coupling bracket used in a T-shaped coupling unit of a loading tray according to an embodiment of the present invention.

Fig. 2G and 2H are side and front views illustrating the structure and operation of the T-shaped connecting bracket shown in fig. 2F.

Fig. 3A is a perspective view illustrating an L-shaped link unit of a loading tray in detail according to an embodiment of the present invention.

Fig. 3B is an exploded perspective view illustrating an L-shaped link unit of a loading tray in detail according to an embodiment of the present invention.

Fig. 3C is a perspective view illustrating in detail an outer L-shaped coupling bracket used in an L-shaped coupling unit of a loading tray according to an embodiment of the present invention.

Fig. 3D is a perspective view illustrating in detail an inner L-shaped coupling bracket used in an L-shaped coupling unit of a loading tray according to an embodiment of the present invention.

Fig. 3E is a side view illustrating an L-shaped coupling unit of a loading tray according to an embodiment of the present invention.

Fig. 3F is a side view illustrating a coupled state of L-shaped link units of the loading tray according to the embodiment of the present invention.

Fig. 3G and 3H are a perspective view and an exploded perspective view illustrating another application example of an L-shaped link unit of a loading tray according to an embodiment of the present invention.

Fig. 3I and 3J are perspective views illustrating in detail another application example of an outer L-shaped coupling bracket and an inner L-shaped coupling bracket used in an L-shaped coupling unit of a loading tray according to an embodiment of the present invention.

Fig. 3K is a side view illustrating the structure and operation of the outer L-shaped linking bracket and the inner L-shaped linking bracket shown in fig. 3I and 3J.

Fig. 4A is a perspective view illustrating in detail an I-shaped coupling unit of a loading tray according to an embodiment of the present invention.

Fig. 4B is an exploded perspective view illustrating the I-shaped coupling unit of the loading tray in detail according to the embodiment of the present invention.

Fig. 4C is a perspective view illustrating in detail an I-shaped coupling bracket used in the I-shaped coupling unit of the loading tray according to the embodiment of the present invention.

Fig. 4D is a side view illustrating an I-shaped coupling unit of a loading tray according to an embodiment of the present invention.

Fig. 4E is a perspective view illustrating in detail an I-shaped coupling bracket of a loading tray used in another application example of an I-shaped coupling unit according to an embodiment of the present invention.

Fig. 4F is a side view illustrating the structure and operation of the I-shaped connecting bracket shown in fig. 4E.

Fig. 5A is a perspective view illustrating in detail the L-I-shaped link unit of the loading tray according to the embodiment of the present invention.

Fig. 5B is an exploded perspective view illustrating in detail the L-I-shaped link unit of the loading tray according to the embodiment of the present invention.

Fig. 5C is a side view illustrating the structure and operation of a L-shaped bracket and an I-shaped coupling bracket used in another application example of L-I-shaped coupling units of a loading tray according to an embodiment of the present invention.

Fig. 6A is a perspective view illustrating the caster connecting unit of the loading tray in detail according to the embodiment of the present invention.

Fig. 6B is an exploded perspective view illustrating the caster connecting unit of the loading tray in detail according to the embodiment of the present invention.

Fig. 6C is a perspective view illustrating in detail a caster connecting bracket used in a caster connecting unit of the loading tray according to the embodiment of the present invention.

Fig. 6D is a side view illustrating a caster connecting unit of a loading tray according to an embodiment of the present invention.

Fig. 7A is a perspective view illustrating in detail a loading tray according to another embodiment of the present invention.

Fig. 7B is a perspective view illustrating a state of the loading tray in which the frame assembly is rotated by the rotation coupling unit portion according to another embodiment of the present invention.

Fig. 7C is a perspective view illustrating a rotation coupling unit in a loading tray according to another embodiment of the present invention.

Fig. 7D is an exploded perspective view illustrating a rotation coupling unit in a loading tray according to another exploded embodiment of the present invention.

Fig. 7E is a perspective view illustrating a first rotary link bracket constituting a rotary link unit in a loading tray according to another embodiment of the present invention.

Fig. 7F is a perspective view illustrating a second rotary connecting bracket constituting a rotary connecting unit in a loading tray according to another embodiment of the present invention.

Fig. 7G is a perspective view illustrating a hinge constituting a portion of a rotating link unit in a loading tray according to another embodiment of the present invention.

Fig. 7H is a side view illustrating a rotation coupling unit in a loading tray according to another embodiment of the present invention.

Fig. 8A is a perspective view illustrating in detail an inclined connection unit in a loading tray according to still another embodiment of the present invention.

Fig. 8B is an exploded perspective view illustrating in detail the inclined link unit in the loading tray according to still another exploded embodiment of the present invention.

Fig. 8C is a perspective view illustrating in detail a first inclined connection bracket constituting an inclined connection unit in a loading tray according to still another embodiment of the present invention.

Fig. 8D is a perspective view illustrating in detail a second inclined connection bracket constituting an inclined connection unit in a loading tray according to still another embodiment of the present invention.

Fig. 8E is a side view illustrating in detail the inclined connection unit in the loading tray according to still another embodiment of the present invention.

Detailed Description

Hereinafter, a loading tray according to the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

Fig. 1 is a perspective view illustrating a loading tray according to an embodiment of the present invention. Referring to fig. 1, the loading tray according to the embodiment of the present invention includes a frame body 1 and a connection unit J1, a connection unit J2, a connection unit J2 ', a connection unit J3, a connection unit J4, and a connection unit Jc, wherein the frame body 1 has a rectangular parallelepiped shape formed by connection frames F, and among the connection units J1, the connection unit J2, the connection unit J2', the connection unit J3, the connection unit J4, and the connection unit Jc, portions where the frames F are gathered adjacent to each other are connected by a coupling bracket.

A side plate (not shown in the drawings) is coupled to the frame body 1 to prevent the load from falling or to protect the load, or wheels such as caster wheels are attached to a lower portion of the frame body 1 to facilitate movement.

The frame F may be made of a resin material having sufficient rigidity, and a metal material such as steel or aluminum having a structure including a rectangular section. An example is shown in the drawings, in which the frame F is manufactured as a rectangular-section steel frame having a hollow lightweight structure.

The connection unit J1, the connection unit J2, the connection unit J2 ', the connection unit J3, the connection unit J4, and the connection unit Jc include T-shaped connection units J1, L-shaped connection units J2 and L-shaped connection units J2 ', I-shaped connection units J3, hybrid L-I-shaped connection units J4, and caster connection units Jc, in which, at the T-shaped connection unit J1, frames F are connected in a T-shape, at L-shaped connection units J2 and L-shaped connection units J2 ', frames F are connected in a L-shape, at the I-shaped connection unit J3, frames F are connected in an I-shape, and at the hybrid L-I-shaped connection unit J4, frames F are vertically connected in multiple directions.

Hereinafter, each of the connection unit J1, the connection unit J2, the connection unit J2', the connection unit J3, the connection unit J4, and the connection unit Jc will be described in more detail.

The frame body 1 of the loading tray according to the embodiment of the present invention includes a T-shaped coupling unit J1 where a frame F is coupled in a T-shape at a T-shaped coupling unit J1.

Referring to fig. 2A to 2E, the T-shaped connection unit J1 has a structure in which a pair of T-shaped connection brackets T are placed on both surfaces of a portion where the ends of the second frame J1-f2 are positioned near one side surface of the first frame J1-f1 so as to be gathered in a T shape, the pair of T-shaped connection brackets T cover the portion where the first frame J1-f1 and the second frame J1-f2 are gathered, and thus the first frame J1-f1 and the second frame J1-f2 are connected to each other.

The T-shaped connecting bracket T may be made of various materials. In order to ensure sufficient rigidity, the T-shaped connecting bracket T may be formed by punching an iron plate. Each of the T-shaped connecting brackets T includes a first grip portion T1, a second grip portion T2, a first side grip portion T3, a second side grip portion T4, and a coupling portion T5.

The first tightening part T1 is a portion that is placed on one surface of the first frame J1-f1 and tightens the first frame J1-f1 vertically at the portion where the first frame J1-f1 is gathered with the second frame J1-f 2.

The first side tightening portion T3 is a portion for transversely tightening the first frame J1-f 1. The first side tightening part T3 is bent at a right angle at the end edge of the tightening part T1 and is placed to cover one side surface of the first frame J1-f1, which is opposite to the other side surface of the first frame J1-f1, which is located at the side where the ends of the first frame J1-f1 are gathered, with the second frame J1-f 2. Thus, the first side tightening part T3 tightens the other side of the first frame J1-f 1.

On the other hand, at the first side fitting grip portion T3 of the T-shaped connecting bracket T, a fitting convex portion T31 and a fitting concave portion T32 are formed to be engaged with each other. Referring to the drawings, the pair of T-shaped connecting brackets T in which the fitting protrusion T31 of one T-shaped connecting bracket is inserted into the fitting recess T32 of the other T-shaped connecting bracket and the fitting protrusion T31 of the other T-shaped connecting bracket is inserted into the fitting recess T32 of one T-shaped connecting bracket are overlapped at a portion where the first frame J1-f1 and the second frame J1-f2 contact each other to face each other, and thus, the first side grip portions T3 are brought into fitting with each other.

The second tightening part T2 is located on one surface of the second frame J1-f2, and vertically tightens an end of the second frame J1-f2 at a portion where the first frame J1-f1 is gathered with the second frame J1-f 2.

The second side tightening part T4 is bent at a right angle at both edges of the second tightening part T2, and is placed to cover both sides of the second frame J1-f2 and to tighten the ends of the second frame J1-f2 laterally. The second side tightening part T4 extends to the coupling part T5, and its end is in contact with the other side surface of the first frame J1-f1 to laterally support the first frame J1-f 1.

The coupling portion T5 is a portion where the coupling bolt B is coupled with the coupling nut N to tighten the first frame J1-f1 and the second frame J1-f2 when the pair of T-shaped connection brackets T placed to face each other are coupled to each other. The coupling portion T5 is located between the first tightening portion T1 and the second tightening portion T2 to connect the first tightening portion T1 and the second tightening portion T2. A bolt hole T52 into which the coupling bolt B is inserted is formed in the coupling portion T5. The mounting portion T51 is formed around the bolt hole T52 so as to be recessed from the outside of the coupling portion T5 and to protrude toward the inside of the coupling portion T5. The head of the coupling bolt B and the coupling nut N are mounted in the mounting portion T51.

A reinforcing bead T6 is formed on the first tightening part T1 and the coupling part T5 of the T-shaped connecting bracket T such that the connection part between the first tightening part T1 and the coupling part T5 is not bent and deformed by the coupling of the coupling bolt B and the coupling nut N.

A notch T7 for preventing stress concentration is formed at a corner where the edges of the second side tightening part T4 of the T-shaped attaching bracket T gather. In the drawing, the second side tightening portion T4 extends to the coupling portion T5, and thus, the cutout T7 is formed at a corner where the edges of the second side tightening portion T4 and the coupling portion T5 converge. However, when the second side grip portion T4 is located in the second grip portion T2, the notch T7 is formed at a corner where the edges of the second grip portion T4 and the second grip portion T2 meet.

The pair of T-shaped connecting brackets T are overlapped at a portion where the first frame J1-f1 and the second frame J1-f2 are gathered and coupled to each other by coupling the coupling nut N to the coupling bolt B inserted into the bolt hole T52 to face each other. When the pair of T-shaped connecting brackets T are coupled, the first frame J1-f1 is gripped by the first grip portion T1 and the first side grip portion T3, and the second frame J1-f2 is gripped by the second grip portion T2 and the second side grip portion T4. Thus, the first frame J1-f1 and the second frame J1-f2 meet and are coupled to each other in a T-shape.

Referring to fig. 2F to 2H, like the T-shaped connecting bracket T shown in fig. 2A to 2G, the T-shaped connecting bracket T 'shown includes a first grip portion T1', a second grip portion T2 ', a first side grip portion T3', a second side grip portion T4 ', and a coupling portion T5'.

The pair of T-shaped connecting brackets T 'overlap to face each other at a portion where the first frames J1-f1 and the second frames J1-f2 are gathered and coupled to each other by coupling nuts to the coupling bolts B inserted into the bolt holes T52'.

In the T-shaped connecting bracket T ', a bearing portion T42 ' serving as a bearing point of the lever is formed in the second side grip portion T4 '. The second side tightening part T4 'extends beyond the bolt hole T52' of the coupling portion T5 'toward the first tightening part T1'. The support portion T42 'is located between the bolt hole T52' and the first tightening portion T1 'and is formed to protrude downward from the second side tightening portion T4'. Among the pair of T-shaped connecting brackets facing each other due to the coupling of the coupling bolt B and the coupling nut N, the support portion T42 'of one T-shaped connecting bracket is in contact with the support portion T42' of the other T-shaped connecting bracket. Thus, when the second tightening portion T2 ' is rotated in the tightening direction F1, the second frame J-F2 is more strongly tightened by the second tightening portion T2 ', wherein the second tightening portion T2 ' is located opposite to the support portions T42 ' that are in contact with each other with respect to the bolt holes T52 '. The position P2 serves as a support point of the lever, and thus, a strong gripping force is generated in the second grip portion T2 ' in which the support portions T42 ' contact each other at the position P2, the second grip portion T2 ' is farther from the position P2 than the position P1, and the coupling bolt B is coupled at the position P1.

The T-shaped connecting bracket T 'is formed such that the fitting projection T31' and the fitting recess T32 'are engaged with each other so as not to slide relative to each other even when a force is applied in a direction F2 in which the first grip portion T1' is moved away from each other in the direction F2. A horizontal fitting portion T34 ' is horizontally formed between the fitting protrusion T31 ' and the fitting recess T32 '. The horizontal fitting portion T34 'is perpendicular to the force applied in the direction F2, in which the first grip portions T1' move away from each other in the direction F2, thus preventing slipping.

In the T-shaped connecting bracket T ', an interference avoiding recess T33 ' is concavely formed on an inner side of the fitting recess T32 ' facing the fitting protrusion T31 ', wherein, when the fitting protrusion T31 ' is inserted into the fitting recess T32 ' and engaged with the fitting recess T32 ', the interference avoiding recess T33 ' allows the end of the fitting protrusion T31 ' to pass therethrough without being caught.

In addition, the frame body 1 of the loading tray according to the embodiment of the present invention includes L-shaped link units J2 and L-shaped link units J2 ', at L-shaped link units J2 and L-shaped link units J2 ', frames F are linked in a L shape in the drawing, a L-shaped link unit denoted by reference numeral "J2" is exemplified in the drawing, in this example, only the end portions of the third frames J2-F3 are insert-coupled to a L-shaped link unit, and a L-shaped link unit denoted by reference numeral "J2 '" is an example, in which the third frames J2-F3 are completely insert-coupled to a L-shaped link unit.

Fig. 3A to 3F show L-shaped connection units J2 according to an example in which only the ends of the third frame J2-F3 are insert-coupled to L-shaped connection units J2.

Referring to fig. 3A to 3E, the L-shaped connecting unit J2 is configured such that an outer L-shaped connecting bracket L o is located at an outer side of a portion where an end portion of a first frame J2-f1 and an end portion of a second frame J2-f2 are positioned close to each other and gathered in a2 shape, and an inner 2-shaped connecting bracket 2i is located at an inner side of the gathered portion to cover the portion where the first frame J2-f2 and the second frame J2-f2 are gathered, and thus, the first frame J2-f2 and the second frame J2-f2 are connected to each other in a2 shape, in addition, in the 2-shaped connecting unit J2, a third frame J2-f2 is vertically erected at a portion where the second frame J2-f2 is connected to the first frame J2-f and the end portion of the third frame J2-f2 is joined to the 2.

Outer L-shaped connecting bracket L o and inner L-shaped connecting bracket L i can be made of various materials to ensure sufficient rigidity, outer L-shaped connecting bracket L o and inner L-shaped connecting bracket L i can be formed by stamping iron plates.

An outer L-shaped connecting bracket L o is configured to connect the first frame J2-f1, the second frame J2-f2 and the third frame J2-f3. together with the inner L0-shaped connecting bracket L1 i and an outer L2-shaped connecting bracket L o has an overall shape curved in a L shape the outer L-shaped connecting bracket L o is formed to include a pair of first grip portions L o1, a pair of second grip portions L o2, a pair of coupling portions L o3 and side grip portions L o 4.

The pair of first tightening portions L o1 is formed at a position which is symmetrical at the end of the L-shaped outer connecting bracket L o the pair of first tightening portions L o1 is located on the outer surfaces of the first and second frames J2-f1 and J2-f2 to tighten the ends of the first and second frames J2-f1 and J2-f2 from the outer side to the inner side of the first and second frames J2-f1 and J2-f 2.

The pair of second tightening portions L o2 are bent at a right angle and connected to each other in a L shape to tighten the outer side of the end of the third frame J2-f 3.

The pair of coupling portions L o3 are portions in which the coupling bolt B and the coupling nut N are coupled, each of the pair of coupling portions L o3 is positioned between the first tightening portion L o1 and the second tightening portion L o2, and integrally connected to the first tightening portion L o1 and the second tightening portion L o2. forms a bolt hole L o31 in each of the coupling portions L o3, wherein the coupling bolt B is inserted into the bolt hole L o 31.

Reinforcing beads L o5 are formed on the second tightening part L o2 and the coupling part L o3 of the outer L-shaped connecting bracket L o to reinforce the rigidity of the outer L-shaped connecting bracket L o.

The side tightening parts L o4 are provided on both side surfaces of the first frame J2-f1 and the second frame J2-f2, and tighten portions of side surfaces of the first frame J2-f1 and the second frame J2-f2 laterally.

The grip portions L o4 are bent at right angles at the edges of both sides of the first grip portion L o1 and are placed to cover both sides of the first frame J2-f1 and the second frame J2-f2 so as to grip the side surfaces of the first frame J2-f1 and the second frame J2-f 2.

A notch L o6 for preventing stress concentration is formed at a corner where the edges of the side tightening portions L o4 of the L-shaped connecting bracket L o are gathered, the side tightening portions L o4 are extended to the coupling portions L o3, and a notch L o6 is formed at a corner where the edges of the side tightening portions L o4 and the edges of the coupling portions L o3 are gathered.

An inner L-shaped connecting bracket L i is configured to connect the first frame J2-f1, the second frame J2-f2 and the third frame J2-f3. together with the outer L0-shaped connecting bracket L1 o and an inner L2-shaped connecting bracket L i has an overall shape curved in a L shape the inner L-shaped connecting bracket L i is formed to include a pair of tightening portions L i1, a pair of coupling portions L i2, a side tightening portion L i3 and a curved portion L i 4.

The pair of tightening portions L i1 are placed on the inner surfaces of the first frame J2-f1 and the second frame J2-f2 tightened by the first tightening portion L o1 of the outer L-shaped connecting bracket L o to tighten the first frame J2-f1 and the second frame J2-f2 from the inner side of the first frame J2-f1 and the second frame J2-f2 toward the outer side thereof.

The coupling portion L i2 is a portion in which the coupling bolt B is coupled with the coupling nut N the coupling portion L i2 is positioned between the tightening portion L i1 and the bent portion L i4, and bolt holes L i22 integrally connected to the tightening portion L i1 and the bent portion L i4. are formed in the coupling portion L i2, wherein the coupling bolt B is inserted into the bolt hole L i 22.

Side grip L i3 is provided on both side surfaces of the first frame J2-f1 and the second frame J2-f2, and laterally grips portions of side surfaces of the first frame J2-f1 and the second frame J2-f2 referring to the drawings, the side grip L i3 is bent at right angles at both edges of each of the grip L i1 and is placed to cover both side surfaces of the first frame J2-f1 and the second frame J2-f2 so as to grip the side surfaces of the first frame J2-f1 and the second frame J2-f2, the side grip L i3 extends to the coupling portion L i2, and has a structure in which the close contact L i31 is formed to protrude from an end of the first frame J2-f 68672, the close contact 31 i31 is in contact with an inner surface of the third frame J31-f 31 to support the coupling portion 31-f 31.

The bent portion L i4 is bent at a right angle and connects a pair of coupling portions L0 i2. with a L shape, the bent portion L i4 supports an inner edge of the third frame J2-f3 and tightens the third frame J2-f3. together with the second tightening portion L o2 of the outer L-shaped connecting bracket L o the bent portion L i4 is a portion that receives stress when the coupling bolt B is coupled with the coupling nut N a bead intersecting the bending direction may be formed on the bent portion L i4 an example is shown in the drawing in which a bead is continuously formed from the coupling portion L i2 to the mounting portion L i 31.

In a state in which the outer L-shaped connecting bracket L o is located at an outer side of a corner where the first frame J2-f1 and the second frame J2-f2 meet each other in a L0-shaped manner, and the inner L1-shaped connecting bracket L i is located at an inner side of the corner formed at a position in which the first frame J2-f1 and the second frame J2-f2 meet each other in a L-shaped manner, the coupling nut N is coupled to the coupling bolt B inserted into the bolt hole L o32 and the bolt hole L i22, and thus, the outer L-shaped connecting bracket L o and the inner L-shaped connecting bracket L i are coupled to each other.

In one state, the outer 3-shaped link bracket 4o and the inner 5-shaped link bracket 61 are coupled, the third frame J-f is inserted into a through hole formed by the second tightening portion 9o of the outer 7-shaped link bracket 8o and the bent portion 1i of the inner 5-shaped link bracket 0i, and thus the third frame J-f is coupled to the first frame J-f and the second frame J-f at a right angle when the second tightening portion 4o of the outer 2-shaped link bracket 3o is located on the outer surface of the third frame J-f, the inner edge of the first frame J-f contacts the edge of the bent portion 7i of the inner 5-shaped link bracket 6i, and the coupling nut N is coupled to the bolt hole 8o and the bolt hole 9i, and thus the outer frame J-f and the inner 0-shaped link bracket are coupled to each other when the outer tightening portion 4o of the outer 2-shaped link bracket 3o is located on the outer surface of the third frame J-f, the inner edge of the first frame J-f and the inner 5-shaped link bracket 1i are coupled to each other by the bolt hole 8o and the outer frame J-f.

The tight contact portions L i31 are formed to protrude from the end portions of the side grip portions L i3 of the inner L-shaped connecting bracket L0 i and to contact the inner surfaces of the third frames J2-f3 to grip the inner surfaces of the third frames J2-f 3. therefore, the third frames J2-f3 are strongly gripped by the edges of the tight contact portions L131 with the second grip portions L o2 of the outer L-shaped connecting bracket L o and the curved portions L i4 of the inner L-shaped connecting bracket L i.

Referring to fig. 3F, the end of the third frame J2-F3 may be deviated from the close contact portion L i31, which is in contact with the inner surface of the second frame J2-F3 at a position where the end of the close contact portion L i31 is spaced apart from the end of the third frame J2-F3 by a spacing t, the close contact portion L i31 may be formed to be inwardly inclined from a portion thereof connected to the side grip portion L i3 in order to avoid the deviation.

Mounting portions L o31 are formed around bolt holes L o32, and mounting portions L0 i21 are formed around bolt holes L1 i22, wherein bolt holes L2 o32 are formed in a coupling portion L5 o3 of an outer L3-shaped connecting bracket L4 o, bolt holes L6 i22 are formed in a coupling portion L9 i2 of an inner L7-shaped connecting bracket L8 i, so that the mounting portions L o31 are recessed from an outer side of the coupling portion L0 o3 and protrude toward an inner side of the coupling portion L1 o3, and mounting portions L2 i21 are recessed from an outer side of the coupling portion L3 i2 and protrude toward the coupling portion L i 2. coupling bolts B and coupling nuts N are mounted in the mounting portions L o31 and the mounting portions L i21 to couple the outer L-shaped connecting bracket L o and the inner L-shaped connecting bracket L i.

Referring to fig. 3G to 3H, the third frame J2-f3 is completely insert-coupled to the L-shaped connecting unit J2'.

An outer L-shaped connecting bracket L o ' is formed to include a pair of first tightening portions L0 o1 ', a pair of second tightening portions L1 o2 ', a pair of coupling portions L2 o3 ' and side tightening portions L o4 '. an inner L-shaped connecting unit L i ' is formed to include a pair of tightening portions L i1 ', a pair of coupling portions L i2 ', side tightening portions L i3 ', a bent portion L i4 ' and a close contact portion L i31 '.

The outer connecting bracket o ' and the inner 0-shaped connecting bracket 1i ' are arranged such that the supporting portion 2o ' is formed in the supporting portion lo ' of the outer 3-shaped connecting bracket 4o ', the supporting portion 5i ' is formed in the side tightening portion 8i ' of the inner 6-shaped connecting bracket 7i ' as a supporting point for the lever, in the outer 9-shaped connecting bracket o ', the side tightening portion 0o ' thereof extends beyond the bolt hole of the coupling portion 3o ' of the outer 1-shaped connecting bracket 2o ', in the inner 4-shaped connecting bracket 5i ', the side tightening portion 6i ' thereof extends beyond the bolt hole of the coupling portion 9i ' of the inner 7-shaped connecting bracket 8i ', in the outer connecting bracket 0o ', a portion is formed to project downward between the bolt hole and the second tightening portion 1o ', wherein the side tightening portion 2o ' extends beyond the bolt hole, i, the supporting portion 3o 41. further, in the inner 4-shaped connecting unit 5i, a portion is formed between the bolt hole and the bending portion 6i ', wherein the side tightening portion 7i ' extends beyond the bolt hole, i ' in the bolt hole, i ' and the bolt hole, i ' are located at a position where the bolt hole 3i and the bolt hole 3i ' contact with each other, and the bolt hole 7i ' of the first tightening portion 7i ' are located, and the bolt hole, and the bolt tightening portion 7i ' are located opposite to each other, and the bolt tightening portion 7i ' and the bolt tightening portion, and the bolt tightening portion 7i ' are located, and the bolt tightening portion 7i ' connected, and the bolt tightening portion 7i ' are located, and the bolt tightening portion 7i ' connected, and the bolt tightening portion 7i ' at a position B, and the bolt tightening portion 7i ' of the bolt tightening portion 7i ' are located opposite to the bolt tightening portion, and the bolt tightening portion 7 i's, and the bolt tightening portion 7 tightening portion, and the bolt tightening portion 7i ' are located opposite to the bolt tightening portion, and the bolt tightening portion 7i ' are located opposite, and the bolt tightening portion, and the.

The frame body 1 of the tray according to the embodiment of the present invention includes an I-shaped coupling unit J3, and the frame F is coupled in an "I" shape at the I-shaped coupling unit J3.

Referring to fig. 4A to 4D, the connection unit of the frame body 1 includes an I-shaped connection unit where a pair of I-shaped connection brackets I are located on both surfaces of a portion where the ends of the frames J3-f1 and the ends of the second frames J3-f2 are positioned close to each other and gathered in an I-shape, the pair of I-shaped connection brackets I cover the portion where the first frames J3-f1 and the second frames J3-f2 are gathered, and thus, the first frames J3-f1 and the second frames J3-f2 are coupled to each other. In addition, the I-shaped connection unit J3 is configured such that the third frame J3-f3 is orthogonally disposed to the first frame J3-f1 and the second frame J3-f2, and the third frame J3-f3 is connected to the first frame J3-f1 and the second frame J3-f 2.

The I-shaped connecting bracket I can be made of various materials. To ensure sufficient rigidity, the I-shaped connecting bracket I may be formed by punching an iron plate.

A pair of I-shaped connecting brackets I are configured to connect first frame J2-f1, second frame J2-f2, and third frame J2-f 3. Each of the I-shaped connecting brackets has an overall I-shape. The I-shaped connecting bracket is formed to include a first grip portion I1, a second grip portion I2, a pair of coupling portions I3, and a side grip portion I4.

The pair of first tightening parts I1 are positioned at both ends of the I-shaped connecting bracket I and are placed to tighten the outer side surfaces of the first frame J3-f1 and the second frame J3-f 2.

The second grip portion I2 is positioned at the center of the I-shaped connecting bracket I and is placed to grip the outer surface of the third frame J3-f 3. When the pair of I-shaped connecting brackets face each other while being overlapped with each other, a through hole is formed through the second grip portion I2, and the third frame J3-f3 is inserted into the through hole so as to intersect the first frame f3-f1 and the second frame J3-f2 at right angles. The second tightening part I2 of the I-shaped connecting bracket I is located on the third frame J3-f3, and the coupling nut N is coupled to the coupling bolt inserted into the bolt hole I32. Thus, when the pair of I-shaped connecting brackets I are coupled to each other, the third frame J3-f3 is tightened by the second tightening part I2 of the I-shaped connecting bracket I.

The coupling portion I3 is a portion in which the coupling bolt B and the coupling nut N are coupled. The coupling portion I3 is positioned between the first grip portion I1 and the second grip portion I2, and is integrally connected to the first grip portion I1 and the second grip portion I2. A bolt hole I32 is formed in the coupling portion I3, wherein a coupling bolt B is inserted into the bolt hole I32. The mounting portion I31 is formed around the bolt hole 32 so as to be recessed from the outside of the coupling portion I3 and project toward the inside of the coupling portion I3. The coupling nut N and the head of the coupling bolt B are mounted in the mounting portion I31.

The side tightening parts I4 are placed to cover and tighten both side surfaces of the first frame J3-f1 and the second frame J3-f 2. The side grip portion I4 is formed to be bent at a right angle at both edges of the first grip portion I1. The side grip portion I4 of each of the I-shaped connecting brackets I may be formed to extend to the coupling portion I3. The side tightening part I4 extending to the coupling part may be configured such that its end is in bearing contact with a side surface of the third frame J3-f 3.

A reinforcing bead I5 for reinforcement extends over the second grip part I2 and the coupling part I3 of the I-shaped connecting bracket I.

A notch I6 for preventing stress concentration is formed at a corner where the edges of the side tightening part I4 and the first tightening part I gather, or a corner where the edges of the side tightening part I4 and the coupling part I3 gather when the side tightening part I4 is extended to the coupling part I3, a notch I6 is formed at a corner where the edges of the side tightening part L o4 and the coupling part I3 gather.

When the pair of I-shaped connecting brackets I are overlapped to face each other at a portion where the first and second frames J3-f1 and J3-J2 are gathered and the coupling nut N is coupled to the coupling bolt B inserted into the bolt hole I32, the I-shaped connecting brackets I are coupled to each other, and thus, the first and second frames J3-f1 and J3-f2 are tightened by the first tightening part I1 and the side tightening part I4 of the I-shaped connecting bracket I.

In addition, when the pair of I-shaped connecting brackets I are overlapped to face each other, a through hole is formed through the second grip portion I2, and the third frame J3-f3 is inserted into the through hole to intersect the first frame f3-f1 and the second frame J3-f2 at right angles. In this state, when the coupling nuts N are coupled to the coupling bolts B inserted into the bolt holes I32 and the pair of I-shaped connecting brackets I are coupled to each other, the third frame J3-f3 is tightened by the second tightening parts I2 of the I-shaped connecting brackets I.

The I-shaped connecting bracket for connecting the frames in an I-shape at the I-shaped connecting unit J3 may have the shape shown in fig. 4E and 4F.

Referring to fig. 4E and 4F, the I-shaped connecting bracket I ' has an overall I-shape and is formed to include a pair of first grip portions I1 ', a second grip portion I2 ', a pair of coupling portions I3 ', and side grip portions I4 ', wherein each side grip portion I41 ' has an end portion I41 ' for supporting a side surface of the third frame J3-F3.

The I-shaped connecting bracket I ' is configured such that the support portion I42 ' serves as a support point for the lever in the side grip portion I4 '. In the I-shaped connecting bracket I ', the side tightening part I4 ' extends beyond the bolt hole of the coupling part I3 ', and the support part I42 ' is formed to protrude downward from the extension of the side tightening part I4 '. A pair of I-shaped connecting brackets I' are overlapped to face each other at a portion where the first frames J3-f1 are gathered with the second frames J3-f2, and are coupled by coupling nuts to coupling bolts B inserted into bolt holes. The supporting parts I42 'of the pair of I-shaped connecting brackets I' are in contact with each other, wherein the supporting parts I42 'of the pair of I-shaped connecting brackets I' face each other due to the coupling of the coupling bolt B and the coupling nut, and the first tightening parts I1 'of the I-shaped connecting brackets I' are rotated in the direction F, wherein the first tightening parts I1 'are located opposite to the supporting parts I42' with respect to the bolt holes, the supporting parts I42 'are in contact with each other, and the first tightening parts I1' are tightened with each other in the direction F. Thus, the first frame J3-f1 and the second frame J3-f2 are strongly tightened by the first tightening part I1 'of the I-shaped connecting bracket I'. Position P2 serves as a support point of the lever, the bearing portions I42 ' contact each other at position P2, and thus, a strong gripping force is generated in the first grip portion T1 ', wherein the first grip portion T1 ' is farther from position P2 than position P1, and the coupling bolt B is coupled at position P1.

In addition, the frame body 1 of the loading tray according to the embodiment of the present invention includes L-I-shaped connection units J4, and at L-I-shaped connection units J4, the frame F is connected in a shape of mixing "L" and "I".

That is, the connection unit of the frame body 1 includes an L-I-shaped connection unit J4 assembled by a connection portion where the end of the first frame J4-f1, the end of the second frame J4-f2, and the end of the third frame J4-f3 are gathered close to each other so that the first frame J4-f1 and the second frame J4-f2 are arranged in an I-shape, and the third frame J4-f3 is arranged to form a L-shape with each of the first frame J4-f1 and the second frame J4-f 2.

Referring to fig. 5A and 5B, an I-link unit J has a structure in which portions at which first, second, and third frames J-f are gathered are connected by a pair of inner-shaped link brackets I and one I-shaped link bracket I, in the I-link unit J, one inner-shaped link bracket I is located inside and covers the portion at which the first and third frames J-f and J-f are gathered, and ends of the first and third frames J-f and J-f are tightened, wherein at the portion, the first and third frames J-f and J-f are gathered in a shape, and at the portion at which the first and third frames J-f and J-f are gathered, another inner-shaped link bracket I is located inside and covers the portion, and ends of the second and third frames J-f and J-f are tightened, wherein at the portion, the second and third frames J-f are gathered in a shape, wherein at the portion, the second and third frames J-f are located inside and the third frames J-f are gathered in a shape, and wherein at the portion, the second and the third frames J-f are gathered at the first and the second and J-f are located outside of the first and J-f and the second frame J-f are gathered at the portion.

The pair of inner L-shaped linking brackets L I used in L-I-shaped linking unit J4 have the same structure and operation as inner L-shaped linking bracket L I used in L-I-shaped linking unit J2 in addition, the I-shaped linking bracket I used in L-I-shaped linking unit J4 has the same structure and operation as the inner I-shaped linking bracket I used in I-shaped linking unit J3.

L-I connecting unit J4 has a structure in which fourth frames J4-f4 are orthogonally connected to first, second and third frames J4-f4, and J4-f4, which are orthogonal to each other referring to the drawing, fourth frame J4-f4 is inserted into a through hole formed by a bent portion of inner 4-shaped connecting bracket 4I and a second tightening portion of I-shaped connecting bracket I, and thus coupled to intersect first, second and third frames J4-f4, J4-f4 and J4-f4 at right angles, an inner edge of fourth frame J4-f4 is in contact with an edge of the bent portion of inner 4-shaped connecting bracket 4I, and the second tightening portion of I-shaped connecting bracket I is located on fourth frame J4-f4, and a coupling nut is coupled to the bent portion of bolt hole inserted into bolt hole, thus when the inner 4I is connected to inner 4I-shaped connecting bracket 4I, the inner bracket 4 is connected to the inner side of the inner 4I-shaped connecting bracket 4I by the first frame J4-f 4I and the inner tightening portion of the inner 4I.

Referring to fig. 5C, in an inner L-shaped connecting bracket L I ', side tightening parts extend beyond bolt holes of coupling parts, and support parts L I32' are formed to protrude downward from the extension parts of the side tightening parts in an I-shaped connecting bracket I ', each side tightening part extends beyond the bolt hole of a coupling part, and support parts I42' are formed to extend downward from the extension parts of the side tightening parts.

The support portions 0I ' of a pair of inner connecting brackets I ' are brought into contact with each other, wherein the support portions 3I ' of the pair of inner 1-shaped connecting brackets 2I ' face each other due to the coupling of the coupling bolt and the coupling nut, and the tightening portions of the pair of 4-shaped connecting brackets 5I ' are rotated in the direction F, wherein the 6-shaped connecting bracket 7I ' is positioned opposite the support portions with respect to the bolt hole, the support portions are brought into contact with each other, and the tightening portions are tightened with respect to each other in the direction F. thus, the third frame J-F is tightened by the tightening portions of the pair of inner 8-shaped connecting brackets 9I ', further, the support portions 1I ' of the inner 2-shaped connecting brackets 0I ' and the support portions I ' of the I-shaped connecting brackets I ' are brought into contact with each other, wherein the support portions 4I ' of the inner 2-shaped connecting brackets 3I ' and the support portions I ' of the I-shaped connecting brackets I ' face each other due to the coupling bolt hole and the coupling nut, and wherein the tightening portions of the first tightening portions of the 5-shaped connecting brackets I ' and the first tightening portions I ' are positioned opposite the first tightening portions of the first support portions and the first tightening portions I ' of the first frame I ' and the first tightening portions of the first frame I ' are rotated in the direction F, and the first tightening portions of the first frame I ' opposite the first tightening portions.

Meanwhile, to facilitate transportation, casters C are attached to the lower portion of the frame body 1 according to the embodiment of the present invention. The frame body 1 of the loading tray according to the present invention includes a caster connecting unit Jc for easily and powerfully mounting the caster C.

Referring to fig. 6A to 6D, the connection unit of the frame body 1 includes a caster connection unit C, wherein, at the caster connection unit C, both end portions of each caster connection bracket Cb are coupled to a corresponding one of a first frame C-f1 and a second frame C-f2, wherein the first frame C-f1 and the second frame C-f2 are arranged in parallel on the lower portion of the frame body 1, and a caster C is attached to the lower portion of the caster connection bracket Cb. In the drawings, in the illustrated embodiment, a pair of caster connecting brackets Cb are provided on a caster connecting unit C so as to be adjacent to each other, and a caster C is attached to a lower portion of the pair of connecting brackets Cb.

The caster connecting bracket Cb is formed to include a coupling portion Cb1 and a mounting portion Cb2, wherein the coupling portion Cb1 is located at both end portions of the caster connecting bracket Cb, and the mounting portion Cb2 is located between the coupling portions Cb1 and is integrally connected to the coupling portion Cb1 at both side portions thereof. A bolt hole Cb21 is formed in the mounting portion Cb2 for connection with the caster C, wherein the coupling bolt B is inserted into the bolt hole Cb 21. The latch part Cb3 is formed to be bent downward from both edges of the mounting part Cb 2.

The mounting portions Cb2 of the caster connecting bracket Cb are located in the gap between the first and second frames C-f1 and C-f2, and thus, each of the coupling portions Cb1 is coupled to the upper surface of a corresponding one of the first and second frames C-f1 and C-f 2. In order to strongly fix the caster attachment bracket Cb between the first frame C-f1 and the second frame C-f2, the latch part Cb3 is in close contact with the inner surfaces of the first frame C-f1 and the second frame C-f 2. The latch part Cb3 of the caster attaching bracket Cb enters the gap between the first frame C-f1 and the second frame C-f2, and both end parts of the latch part Cb3 are in close contact with the inner surfaces of the first frame C-f1 and the second frame C-f 2. Accordingly, the caster connecting bracket Cb is strongly coupled between the first frame C-f1 and the second frame C-f 2.

The caster C is mounted on a caster connecting bracket Cb coupled to the first frame C-f1 and the second frame C-f 2. In a state where the caster C is located on the lower portion of the mounting portion Cb2 of the caster connecting bracket Cb, a coupling bolt B is inserted into a bolt hole of the mounting portion Cb2 and a bolt hole (not shown in the drawings) of the caster C, and a coupling nut N is coupled to the coupling bolt B, thereby fixing the caster C to the mounting portion Cb 2.

The loading tray according to the present invention may be configured such that the frame or frame assembly is connected to the support frame so as to be rotatable relative to the support frame.

Referring to fig. 7A to 7H, the connecting portion of the frame body 2 of the present invention includes a rotational connecting unit JR at which the frame F or the frame assembly is connected to the supporting frame JR-fp so as to be rotatable relative to the supporting frame JR-fp. In the drawings, in the illustrated embodiment, a frame assembly formed by connecting frames F in a substantially rectangular shape using T-shaped connecting brackets T is rotatably connected to the support frame JR-fp.

In the rotation connection unit JR, a hinge shaft JR-C2 of a hinge JR-C is inserted into hinge holes formed in a first rotation connection bracket Ra and a second rotation connection bracket Rb, wherein the hinge shaft JR-C2 of the hinge JR-C is fixedly inserted into an end of the frame F or an end of a frame constituting a frame assembly, the first rotation connection bracket Ra and the second rotation connection bracket Rb are coupled to the support frame JR-fp, and thus, the frame F or the frame assembly is rotatably connected to the support frame JR-fp.

The hinge JR-C is hingedly connected to the support frame JR-fp together with the first swivel connection Ra. The first rotating connection bracket Ra includes a grip portion Ra1, a side grip portion Ra2, a coupling portion Ra3, and a hinge portion Ra4, wherein the grip portion Ra1 is located on one surface of the support frame JR-fp, the side grip portion Ra2 is bent at a right angle at one end edge of the grip portion Ra1 and placed to cover one side surface of the support frame JR-fp, the coupling portion Ra3 extends from the grip portion Ra1 in the opposite direction to the grip portion Ra2 and has a bolt hole Ra31, wherein a coupling bolt B is inserted into the bolt hole Ra31, the hinge portion Ra4 extends from the coupling portion Ra3 and has a hinge hole, wherein a hinge shaft JR-C2 of the hinge member JR-C is inserted into the hinge hole. Both side edges of the coupling portion Ra3 and the hinge portion Ra4 are bent at a right angle to form side edge portions Ra5, thereby increasing the rigidity of the first rotating connecting bracket Ra, and the hinge nut HN coupled to the hinge shaft JR-C2 is covered so that the hinge nut HN is not exposed.

The second rotary connecting bracket Rb includes a tightening portion Rb1, a first side tightening portion Rb2, a second side tightening portion Rb3, and a coupling portion Rb4, wherein the tightening portion Rb1 is located on the other surface of the support frame JR-fp, the first side tightening portion Ra2 is bent at a right angle at one end edge of the tightening portion Rb1 and placed to cover one side surface of the support frame JR-fp, the second side tightening portion Rb3 is bent at a right angle at the other end edge of the tightening portion Rb1 in the opposite direction to the first side tightening portion Rb2 and placed to cover the other side surface of the support frame JR-fp, the coupling portion Rb4 is bent at a right angle from the second side tightening portion Rb3 and has a bolt hole into which a coupling bolt B is inserted.

The first and second rotary connecting brackets Ra and Rb are overlapped to face each other such that the tightening portions Ra1 and Rb1 face each other, and the coupling nut N is coupled to the coupling bolt B inserted into the bolt hole Ra 31. Thus, when the first and second rotary connecting brackets Ra and Rb are coupled, the support frame JR-fp is gripped by the grip portion Ra1 and the side grip portion Ra2 of the first rotary connecting bracket Ra and the grip portion Rb1 and the first and second side grip portions Rb2 and Rb3 of the second rotary connecting bracket Rb.

The hinge member JR-C is fixed to an end of one frame F of the frame assembly formed by connecting a plurality of frames F in a substantially rectangular shape using a T-shaped connecting bracket T by inserting the bushing portion JR-C1 into the end of the frame F. The hinge shaft JR-C2 of the hinge member JR-C is inserted into the hinge hole of the first rotary link bracket Ra coupled to the support frame JR-fp, and the hinge nut is coupled to the hinge shaft JR-C2 such that the hinge shaft JR-C2 is not deviated from the hinge hole. Thus, the frame assembly is supported by the support frame JR-fp so as to be able to rotate relatively with respect to the support frame JR-fp, with the hinge joint JR-C fixed to the frame assembly.

In the drawings, in the illustrated embodiment, one side portion of the frame assembly, which is rotatably connected to the support frame JR-fp by the rotation connection unit JR, is caught on the stopper S so that the other side portion of the frame assembly does not fall.

Meanwhile, the loading tray according to the present invention may be configured such that reinforcing frames are connected in a diagonal direction at a portion where adjacent frames are connected in an L shape to reinforce a corner where the frames are connected in a L shape.

Referring to fig. 8A to 8E, the frame body 3 includes a connection unit configured to connect frames, that is, an inclined connection unit Jh at which ends of the reinforcing frame Fh are connected to specific positions of the first frame F1 and the second frame F2 such that the reinforcing frame Fh is connected between the first frame F1 and the second frame F2 in a diagonal direction at a portion where the first frame F1 and the second frame F2 are connected in an L shape.

The inclined connection unit Jh is configured such that a pair of second inclined connection brackets Hb connected to the ends of the reinforcing frame Fh is hinge-connected to a pair of first inclined connection brackets Ha coupled to each of the first and second frames F1 and F2 at a specific position corresponding to one of the first and second frames F1 and F2. According to the present invention, the first and second inclined connection brackets Ha and Hb are hinge-connected to each other such that the reinforcing frame Fh is connected to the first and second frames F1 and F2 at a certain angle.

The first inclined connecting bracket Ha is coupled to the first frame F1 or the second frame F2 to connect the first frame F1 with the reinforcing frame Fh or to connect the second frame F2 with the reinforcing frame Fh, together with the second inclined connecting bracket Hb. The first inclined connecting bracket Ha includes a first grip part Ha1, a second grip part Ha3, and a coupling part Ha2, wherein the first grip part Ha1 is located on a side surface of the first frame F1 or the second frame F2 at a specific position of the first frame F1 or the second frame F2, the second grip part Ha3 is bent from a rear end edge of the first grip part Ha1 and is located on a rear surface of the first frame F1 or the second frame F2, and the coupling part Ha2 extends from a front end of the first grip part Ha1 and has a bolt hole.

The second inclined connection bracket Hb connected to the end portion of the reinforcing frame Fh and hinge-coupled to the first inclined connection bracket Ha includes a grip portion Hb1, a coupling portion Hb2 and a coupling portion Hb3, wherein the grip portion Hb1 is located on a side surface of each end portion of the reinforcing frame Fh, the coupling portion Hb2 extends from one end portion of the grip portion Hb1 and has a bolt hole, and the coupling portion Hb3 extends from the coupling portion Hb2 and has a bolt hole.

The first and second inclined connecting brackets Ha and Hb are each coupled to the first frame F1, the second frame F2, and the reinforcing frame Fh, and are coupled to each other as follows. The pair of first inclined connecting brackets Ha face each other, the first and second grip portions Ha1 and Ha3 of the first inclined connecting bracket Ha are located on both side and rear surfaces of the first frame F1 or the second frame F2, and the first inclined connecting bracket Ha is positioned at a specific position of the first frame F1 or the second frame F2 such that the coupling portions Ha2 of the first inclined connecting bracket Ha are spaced apart from each other to face each other. The pair of second inclined connection brackets Hb face each other, and the grip portions Hb1 of the second inclined connection brackets Hb are located on both side surfaces of the reinforcing frame Fh. In addition, in a state where the second inclined connection bracket Hb is positioned at the end of the reinforcing frame Fh such that the coupling portions Hb3 of the second inclined connection bracket Hb are gathered each other, the coupling bolts B are inserted into bolt holes formed in the coupling portions Hb2 of the second inclined connection bracket Hb, and the coupling nuts N are coupled to the coupling bolts B. Thus, when the pair of inclined connection brackets Hb are coupled to each other, the end portions of the reinforcing frame Fh are tightened by the tightening portions Hb1 of the second inclined connection brackets Hb. The gathered coupling part Hb3 of the second inclined connecting bracket Hb is inserted into a gap between the coupling parts Ha2 of the first inclined connecting bracket Ha facing each other, the coupling bolt B is inserted into the bolt hole of the coupling part Ha2 of the first inclined connecting bracket Ha and the bolt hole of the coupling part Hb3 of the second inclined connecting bracket Hb, and the coupling nut N is coupled to the coupling bolt B. Thus, the first and second tilt link brackets Ha and Hb are hinge-connected.

The loading tray as described above and shown in the drawings is only one example of implementing the present invention and is not construed as limiting the technical spirit of the present invention. The scope of protection of the invention is only determined by the appended claims and various modifications and changes of the embodiments, which do not depart from the characteristics of the invention, are within the scope of the invention as will be apparent to those skilled in the art.

Claims

1. A loading tray includes a frame body assembled by a connection frame, wherein,

the frame has a rectangular cross-section; and

said frames being grouped adjacent to each other and comprising connection units assembled by coupling connection brackets,

wherein the connection unit includes a caster connection unit at which both ends of a caster connection bracket are coupled to a first frame and a second frame which are arranged in parallel on a lower portion of a frame main body, and a caster is attached to the lower portion of the caster connection bracket,

wherein the caster connecting bracket includes coupling parts located at both end portions of the caster connecting bracket and mounting parts located between the coupling parts and integrally connected to the coupling parts at both side portions thereof,

the mounting portion of the caster connecting bracket is located in a gap between the first frame and the second frame such that each of the coupling portions is coupled to an upper surface of a corresponding one of the first frame and the second frame, an

The truckle is installed truckle linking bridge install on the installation department.

2. A loading tray includes a frame body assembled by a connection frame, wherein,

the frame has a rectangular cross-section; and

wherein the connection unit comprises a rotary connection unit at which a frame or a frame assembly is rotatably connected to a support frame,

wherein, in the rotary connection unit, a hinge shaft of a hinge member is inserted into a hinge hole such that the frame or the frame assembly is rotatably connected to a support frame, wherein the hinge member is inserted and fixed to an end of the frame or an end of a frame constituting the frame assembly, the hinge hole is formed in a first rotary connection bracket and a second rotary connection bracket coupled to the support frame,

wherein the first rotating-connection bracket includes a grip portion located on one surface of the support frame, a side grip portion bent at a right angle at one end edge of the grip portion and placed to cover one side surface of the support frame, a coupling portion extending from the grip portion in a direction opposite to the grip portion and having a bolt hole into which a coupling bolt is inserted, and a hinge portion extending from the coupling portion and having a hinge hole into which the hinge shaft of the hinge member is inserted,

wherein the second rotating connection bracket includes a tightening part, a first side tightening part, a second side tightening part, and a coupling part, wherein the tightening part of the second rotating connection bracket is located on the other surface of the support frame, the first side tightening part is bent at a right angle at one end edge of the tightening part of the second rotating connection bracket and placed to cover one side surface of the support frame, the second side tightening part is bent at a right angle at the other end edge of the tightening part of the second rotating connection bracket in an opposite direction to the first side tightening part and placed to cover the other side surface of the support frame, the coupling part of the second rotating connection bracket is bent at a right angle from the second side tightening part and has a bolt hole into which the coupling bolt is inserted, and

wherein when the first and second rotary connecting brackets are overlapped to face each other such that the tightening portions face each other, and when the first and second rotary connecting brackets are coupled by coupling nuts to the coupling bolts inserted into the bolt holes, the support frame is tightened by the tightening portions and the side tightening portions of the first rotary connecting bracket and the first and second side tightening portions of the second rotary connecting bracket.