Storage unit for welding wire

Provided is a storage unit for welding wire including an outer case in which an outer bottom supporting part is formed in a lower end thereof and a wire accommodation part configured to store a wound welding wire is formed therein, a bottom part seated on and coupled to the outer bottom supporting part, and an inner case configured to come into close contact with an inner surface of the outer case and having an inner bottom supporting part seated on the bottom part, formed in a lower portion thereof, wherein the outer case includes a strength reinforcement part and a shock absorption part formed at an inner side of the strength reinforcement part to absorb a shock from the outside.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and the benefit of Korean Patent Application No. 2018-0024311, filed on Feb. 28, 2018, the disclosure of which is incorporated herein by reference in its entirety.

BACKGROUND

1. Field of the Invention

The present disclosure relates to a storage unit for welding wire, and more specifically, to a storage unit for welding wire which is easily recycled and durable against an external impact and a buckling load, and includes a strap guide and thus is easily carried.

2. Discussion of Related Art

In a conventional general high capacity storage unit for welding wire, a welding wire is stored in a coil shape in a case body, an inner surface of a case body is covered by a resin, and a metallic cover is covered on an opening of an upper end of the case body, and a boundary between the case body and the cover is sealed with a sealing member such as rubber or the like. Further, in the case body of the storage unit, a lower end portion and an upper end portion which require strength are reinforced by a ring-shaped metal member.

Meanwhile, the storage unit can be repeatedly used to store the welding wire after use, but generally is discarded after being used a predetermined number of times. Before the storage unit is discarded, the ring-shaped metal member and the cover which are made of metal have to be separated from the case body. Otherwise, the ring-shaped metal member and the cover are not separated and all of the above are processed as industrial waste. Accordingly, a conventional storage unit has a complicated recycling process and is not eco-friendly.

Accordingly, recently, an effort to remove a reinforcement member such as metal, plastic, or the like for strength reinforcement and manufacture the whole storage unit with a paper material is continuing.

However, the storage unit made of paper is weak against an external impact in comparison with the conventional storage unit. Further, when storage units are stacked in two layers in a state in which welding wires are stored, a buckling load applied to a lower storage unit from an upper storage unit should be overcome.

In addition, an opening can be formed in a side portion of the storage unit to allow the storage unit to be easily moved, and in the case of the storage unit made of paper, the opening of the storage unit is easily worn and damaged when a process such as lifting or moving the storage unit using a strap is repeated over and over. In order to prevent the above, although there is a method of attaching a fiber reinforcement tape or the like to the opening, the method should be performed by hand and a large amount of time is consumed.

SUMMARY OF THE INVENTION

The present disclosure is directed to providing a storage unit for welding wire which is easily recycled and durable against an external impact and a buckling load, and includes a strap guide and thus is easily carried.

According to an aspect of the present disclosure, there is provided a storage unit for welding wire including: an outer case in which an outer bottom supporting part is formed in a lower end thereof and a wire accommodation part configured to accommodate a wound welding wire is formed therein; a bottom part seated on and coupled to the outer bottom supporting part; and an inner case configured to come into close contact with an inner surface of the outer case and having an inner bottom supporting part seated on the bottom part, formed in a lower portion thereof, wherein the outer case includes a strength reinforcement part and a shock absorption part formed at an inner side of the strength reinforcement part to absorb a shock from the outside.

According to an embodiment, the strength reinforcement part may include a first cardboard and a first corrugated cardboard, the shock absorption part may include a second cardboard and a second corrugated cardboard, and the number of corrugations of the first corrugated cardboard may be greater than the number of corrugations of the second corrugated cardboard.

According to an embodiment, R1=l1/d1 may be in a range from 2 to 4 when a length between the corrugation of the first corrugated cardboard and a first corrugation of a next wave adjacent to the corrugation of the first corrugated cardboard is l1 and a thickness of the strength reinforcement part is d1, and R2=l2/d2 may be in a range from 2 to 4 when a length between the corrugation of the second corrugated cardboard and a next corrugation adjacent to the corrugation of the second corrugated cardboard is l2 and a thickness of the shock absorption part is d2.

According to an embodiment, RC=C1/C2 may be in a range from 1.27 to 1.67 when the number of corrugations per unit length of the first corrugated cardboard is C1 and the number of corrugations per unit length of the second corrugated cardboard is C2.

According to an embodiment, the outer case may further include two or more accommodation space parts each configured to accommodate a strap guide in a side portion.

According to an embodiment, the strap guide may be coupled to the accommodation space part, and the strap guide may include: a first module including a first base, a strap boss formed on the first base and including a first slot through which a strap passes, and at least one protrusion accommodation part located at an outer circumferential portion of the strap boss and including a bore; and a second module including a second base, a second slot formed in the second base, and at least one coupling protrusion located at an outer circumferential portion of the second slot and formed to form a pair with the protrusion accommodation part, wherein the first module and the second module are coupled to form an opening having a single closed surface.

According to an embodiment, an edge of the opening may have a gentle round shape.

According to an embodiment, the second base may further include a bent portion having an inclination angle and inclined toward the outside.

According to an embodiment, the accommodation space part may include a center space part into which the strap boss is fitted, and an upper space part and a lower space part into which the protrusion accommodation part is fitted, and the strap guide may be fitted into the accommodation space part

According to an embodiment, the first module may be disposed in an interspace part between the outer case and the inner case and the second module may pass through the accommodation space part formed in an outer surface of the outer case from the outer side of the outer case to be coupled to the first module.

According to an embodiment, a height of the strap boss may be greater than or equal to a thickness of the outer case

According to an embodiment, the storage unit may further include a strap having a center portion disposed between the outer bottom supporting part and the bottom part and both end portions disposed in the interspace part between the outer case and the inner case, and exposed to an accommodation space part formed to face an outer surface of the outer case to form engaging portions.

According to an embodiment, the inner case may further include at least one cut portion.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

Hereinafter, the present disclosure will be described in detail with reference to the accompanying drawings. However, the present disclosure may be implemented in various forms, and accordingly, the present disclosure is not limited to the following embodiment. Components not related to the description are omitted in the drawings to clearly describe the present disclosure, and the same reference symbols are used for the same or similar components in the description. In the description, in the case in which predetermined components are described as being “connected” to other components, the above case includes a case in which components are indirectly connected to other components. Further, in the case in which predetermined components are described as “including” predetermined elements, the above case does not exclude other elements but may further include the other elements unless otherwise defined.

FIG. 1is a perspective view illustrating an appearance of a storage unit1000for welding wire according to an embodiment of the present disclosure. Further, the storage unit1000for welding wire of the present disclosure may be formed of paper.

Referring toFIG. 1, the appearance of the storage unit1000for welding wire may be formed by an outer case100and a cap600. The outer case100may have a polygonal pillar shape and may preferably have a cross-section having a regular dodecagon shape. An upper portion of the outer case100is formed to be open to the outside. The cap600may have a polygonal pillar shape corresponding to the shape of the outer case100having an inner space portion. The cap600serves to close the upper portion of the outer case100to protect the inside of the outer case100. When the cap600closes the upper portion of the outer case100, a part of the upper portion of the outer case100may be accommodated in the inner space portion of the cap600.

FIG. 2is a perspective view illustrating the outer case100according to the embodiment of the present disclosure,FIG. 3is a plan view in which the outer case of the present disclosure is viewed from the above with a partial enlarged view illustrating a strength reinforcement part and a shock absorption part of the outer case, respectively. Further,FIG. 4is a bottom view in which the outer case100is viewed from below.

Referring toFIGS. 2 to 4, the outer case100may have a polygonal pillar shape and the outer case100may have an outer bottom supporting part102formed in a lower portion thereof and a wire accommodation part103formed therein and configured to accommodate a wound welding wire (not shown). Further, an inner case which will be described below may be located adjacent to an inner surface104and an accommodation space part130from which a strap500which will be described below is exposed may be formed in an outer surface105. Further, a strap guide700which will be described below may be coupled to the accommodation space part130.

The outer case100may include a strength reinforcement part110and a shock absorption part120formed at an inner side of the strength reinforcement part110to absorb an external impact.

The strength reinforcement part110includes a first cardboard112and a first corrugated cardboard111. A cross-sectional shape of the first corrugated cardboard111may roughly be a sine-functional wave shape. Due to the shape of the first corrugated cardboard111, compression load strength and buckling load strength of the strength reinforcement part110may be improved. Further, the first cardboard112may be formed of an outer first cardboard112aand an inner first cardboard112b.

The shock absorption part120includes a second cardboard122and a second corrugated cardboard121. A cross-sectional shape of the second corrugated cardboard121may roughly be a shape in which pentagons are repeatedly disposed. Due to the shape of the second corrugated cardboard121, an impact force applied to the shock absorption part120is effectively absorbed. Further, the second cardboard122may be formed of an outer second cardboard122aand an inner second cardboard122b. Meanwhile, according to the embodiment of the present disclosure, the inner first cardboard112band the outer second cardboard122amay be integrally formed.

Further, in the whole outer case100, since the strength reinforcement part110is formed at the outside and the shock absorption part120is formed at the inside, when the shock is applied, the outer case100is not dented or damaged and the shock is not transferred to the welding wire accommodated in the outer case100. Accordingly, since a separate storage unit1000for welding wire configured to accommodate the welding wire is stacked on the storage unit1000for welding wire, the outer case100of the lower storage unit1000for welding wire does not buckle even when a load is applied.

According to the embodiment of the present disclosure, the outer side of the strength reinforcement part110may be coated with a synthetic resin having watertightness. Accordingly, the inside of the strength reinforcement part110may be protected from external moisture or the like.

The number of corrugations111aper unit length of the first corrugated cardboard111may be formed to be greater than the number of corrugations121aof the second corrugated cardboard121. Accordingly, in the strength reinforcement part110, a gap between the outer first cardboard112aand the inner first cardboard112bis not easily compressed relatively, and the strength reinforcement part110may efficiently resist against a compressing force. Meanwhile, in the shock absorption part120, since a gap between the outer second cardboard122aand the inner second cardboard122bis easily compressed relatively, the shock absorption part120may efficiently absorb the shock.

According to the embodiment of the present disclosure, in the strength reinforcement part110, when a length between a corrugation of the first corrugated cardboard111and a first corrugation of a next wave adjacent to the corrugation of the first corrugated cardboard111is l1 and a thickness of the strength reinforcement part110is d1, R1=l1/d1 may be in a range from 2 to 4 and may preferably be in a range from 2.5 to 3.5.

When R1 is smaller than 2, since the length between the corrugations of the first corrugated cardboard111becomes excessively smaller than the thickness of the strength reinforcement part110, productivity of the strength reinforcement part110is degraded.

Meanwhile, when R1 is greater than 4, since the length between the corrugations of the first corrugated cardboard111becomes excessively greater than the thickness of the strength reinforcement part110, the strength reinforcement part110is easily compressed, dented, or damaged when an external impact is applied, and accordingly, the welding wire stored in the storage unit1000may not be protected.

Accordingly, since R1 has a value within the above described numerical range, resistance of the strength reinforcement part110against a compressing force is maximized without degradation of production efficiency.

Further, in the shock absorption part120, when a length between a corrugation of the second corrugated cardboard121and a next corrugation adjacent to the corrugation of the second corrugated cardboard121is l2 and a thickness of the shock absorption part120is d2, R2=l2/d2 may be in a range from 2 to 4 and may preferably be in a range from 2.5 to 3.5.

When R2 is smaller than 2, the length between the corrugation of the second corrugated cardboard121and a next corrugation adjacent to the corrugation of the second corrugated cardboard becomes excessively smaller than the thickness of the shock absorption part120. Accordingly, since resistance of the second corrugated cardboard121against a shock increases, the shock is not efficiently absorbed.

Meanwhile, when R2 is greater than 4, the length between the corrugation of the second corrugated cardboard121and the next corrugation adjacent to the corrugation of the second corrugated cardboard becomes excessively greater than the thickness of the shock absorption part120. Accordingly, since the second corrugated cardboard121is easily deformed even by a light shock, a shock occurring in a working environment while the welding wire is carried may not be completely absorbed.

Accordingly, since R2 has a value within the above described numerical range, a shock absorption effect of the second corrugated cardboard121may be optimized.

According to the embodiment of the present disclosure, when the number of corrugations111aper unit length of the first corrugated cardboard is C1 and the number of corrugations121aof the second corrugated cardboard is C2, RC=C1/C2 may be in a range from 1.27 to 1.67 and may preferably be in a range from 1.37 to 1.57.

When RC is smaller than 1.27, since the strength of the strength reinforcement part110is degraded, the outer case100may be dented or damaged. On the other hand, since the shock absorption part120has a resistance against an external impact, the external impact is transferred to the welding wire accommodated in the storage unit1000and thus the welding wire may be damaged.

Meanwhile, when RC is greater than 1.67, ease of production may be sharply degraded or the shock absorption performance of the shock absorption part120may be degraded.

Accordingly, since RC has a value within the above described numerical range, the strength and shock absorption effect of the outer case100may be optimized.

According to the embodiment of the present disclosure, the thickness d2 of the shock absorption part120may be greater than the thickness d1 of the strength reinforcement part110. Accordingly, the strength reinforcement part110may serve to provide strength to the outer case100, and the shock absorption part120may easily absorb an external impact applied to the outer case100.

When the outer case100is viewed from below, an outer bottom supporting part102may have a trapezoid shape in which a length of an inner side102bis smaller than that of an outer side102aand may preferably have an isosceles trapezoid shape. Further, the outer bottom supporting part102may be formed in a manner which is integrated with the outer surface105, extended from the outer surface105, and folded at a lower edge. In addition, the outer bottom supporting part102may also be formed to have a structure of the strength reinforcement part (110, seeFIG. 3) and the shock absorption part (120, seeFIG. 3).

FIG. 5is a cutaway view of a state in which the outer case100according to the embodiment of the present disclosure, a bottom part200, a bottom reinforcement part210, an elasticity retaining plate400, an elastic body retaining part450, the strap guide700, and the strap500are coupled, including partial enlarged views thereof.

Referring toFIG. 5, the bottom part200may have a polygonal shape corresponding to a cross-sectional shape of the outer case100and may be seated on and coupled to the outer bottom supporting part102. The bottom part200may also be formed to have the structure of the strength reinforcement part (110, seeFIG. 3) and the shock absorption part (120, seeFIG. 3). Further, the structure of the strength reinforcement part may be formed at an upper side and the structure of the shock absorption part may be formed at a lower side. Accordingly, since dents or damage does not easily occur even when an external force is applied in a vertical direction of the outer case100and the external force is easily absorbed, the welding wire accommodated in the storage unit1000may be stably protected.

The bottom reinforcement part210may be disposed on the bottom part200. Further, the bottom reinforcement part210may also be formed to have the structure of the strength reinforcement part (110, seeFIG. 3) and the shock absorption part (120, seeFIG. 3).

Meanwhile, the bottom reinforcement part210may be formed so that the structure of the shock absorption part is formed at an upper side and the structure of the strength reinforcement part is formed at a lower side. Accordingly, the bottom reinforcement part210may easily absorb a shock applied when the welding wire is accommodated.

A hole (not shown) which is capable of coupling the elastic body retaining part450which will be described below may be formed in a center portion of each of the bottom part200and the bottom reinforcement part210.

The elasticity retaining plate400may be disposed on the bottom reinforcement part210. Further, the elasticity retaining plate400may also be formed to have the structure of the strength reinforcement part (110, seeFIG. 3) and the shock absorption part (120, seeFIG. 3). Alternatively, the elasticity retaining plate400may be formed to have a structure in which multiple layers of scrap paper are stacked to have a compressed structure.

A hole (not shown) may be formed in a center portion of the elasticity retaining plate400, and the elastic body retaining part450may be coupled to the elasticity retaining plate400through the hole. More specifically, an upper coupling part460of the elastic body retaining part450passes through the holes (not shown) formed in the center portions of the elasticity retaining plate400, the bottom reinforcement part210, and the bottom part200from an upper side of the elasticity retaining plate400to be coupled therewith, and a lower coupling part480of the elastic body retaining part450configured to serve as an engaging port may be engaged with the upper coupling part460at a lower side of the bottom part200.

The upper coupling part460of the elastic body retaining part450includes a ring-shaped elastic body engaging portion470having an upper side with which an elastic body may be engaged.

FIG. 6is a perspective view illustrating an inner case300according to the embodiment of the present disclosure,FIG. 7is a bottom view in which the inner case300of the present disclosure is viewed from below, andFIG. 8is a cutaway view of the inner case of the present disclosure with a partial enlarged view thereof.

Referring toFIGS. 6 to 8, the inner case300may have a cylindrical pillar shape. An inner bottom supporting part302may be formed in a lower portion of the inner case300and a wire accommodation part303capable of accommodating wound welding wires (not shown) may be formed in the inner case300. Further, the inner case300may be detachably inserted into the outer case100, and when the inner case300is inserted into the outer case100, an outer surface305of the inner case300comes into close contact with the inner surface104of the outer case100.

The inner case300may be formed of paper. Specifically, since the inner case300may be made of a hard board formed by pressing multiple layers of cardboard, the cylindrical shape may be solidly maintained.

The inner bottom supporting part302may be formed to have the structure of the strength reinforcement part (110, seeFIG. 3) and the shock absorption part (120, seeFIG. 3). Accordingly, the shock applied when the welding wire is accommodated may be easily absorbed.

A hole306may be formed in a center portion of the inner bottom supporting part302. The elastic body retaining part450may be exposed and coupled to a tensile spring through the hole306.

Further, a residual amount check part310capable of checking a residual amount of the wound wires and a retainer guide320capable of guiding the movement of a retainer (not shown) may be formed in an inner surface304of the inner case300.

In addition, according to the embodiment of the present disclosure, when the inner case is discarded after all of the wires wound in the storage unit1000for welding wire are consumed, at least one cut portion307may be formed in an outer surface305of the inner case300so that the inner case300is easily bent.

A shape of the cut portion307may be a cut groove having a predetermined depth, a dotted line shape, or another cut shape.

Although the number of cut portions307is not limited, the cut portions307may preferably be three cut portions formed at 120° angles so that the inner case300may maintain solidity and may be easily bent when discarded.

Accordingly, the inner case300made of a solid hard board may be easily processed, and the time for discarding may be reduced.

FIGS. 9A and 9Bare an exploded view illustrating a case in which the inner case is inserted into the outer case of the present disclosure and the cap covers the upper portion of the outer case on the basis of axis L and a view illustrating a state in which the outer case and the inner case of the present disclosure are coupled, respectively.

Referring toFIGS. 9A and 9B, since the inner case300is inserted into the outer case100and thus the inner surface104of the outer case100and the outer surface305of the inner case300come into contact with each other and the cap600is coupled to the upper portion of the outer case100, the outer case100and the inner case300may be assembled.

Further, when the inner case300is inserted into the outer case100, the strap500may be interposed between the outer surface305of the inner case300and the inner surface104of the outer case100. Accordingly, the whole strap500except a portion exposed to the outer side of the outer case100is stably maintained by a friction force between the inner case300and the outer case100.

Referring toFIGS. 3, 6, and 9, since the outer case100and the inner case300are coupled to each other, a three-layer structure may be formed by the strength reinforcement part110, the shock absorption part120, and the inner case300. Accordingly, the storage unit1000for welding wire of the present disclosure may stably protect the welding wire accommodated therein even against an external impact applied in a lateral direction, and may not be bent or damaged even when a buckling load is applied from the above.

Referring toFIGS. 5 and 8, when the outer case100and the inner case300are coupled to each other, a five-layer structure may be formed by the outer bottom supporting part102, the bottom part200, the bottom reinforcement part210, the elasticity retaining plate400, and the inner bottom supporting part302. Accordingly, the storage unit1000may stably bear a weight of the welding wire accommodated therein, and the welding wire may be stably protected against a load and shock applied in a vertical direction to the storage unit1000for welding wire according to the embodiment of the present disclosure.

FIGS. 10A and 10Bare a front view of the accommodation space part of the storage unit for welding wire according to the embodiment of the present disclosure and a front view of the accommodation space part to which the strap guide is coupled, respectively,FIGS. 11A and 11Bare a perspective view of the accommodation space part of the storage unit for welding wire according to the embodiment of the present disclosure and a perspective view of the accommodation space part to which the strap guide is coupled, respectively, andFIGS. 12A and 12Bare perspective views of a first module and a second module of the strap guide according to the embodiment, respectively.

Referring toFIGS. 10 to 12, the storage unit1000for welding wire may include at least two accommodation space parts130configured to accommodate at least two strap guides700. The strap guides700may be coupled to the storage unit1000for welding wire through the accommodation space parts130, and the strap500may be exposed to the outer side of the outer case100through an opening730of the strap guide700.

The strap guide700is used in a manner in which a first module710and a second module720are coupled or separated through the accommodation space part130of the storage unit1000for welding wire.

Referring toFIG. 12, the first module710includes a first base711, a strap boss714, a first slot715, and at least one protrusion accommodation part712. The first base711may have a thin plate shape having a circular shape, a polygonal shape, or the like.

The strap boss714may be formed to have a predetermined height at a center portion of the first base711, and includes the first slot715surrounded by an inner circumferential surface of the strap boss714.

The protrusion accommodation part712may be formed in a height direction of the strap boss714, and may be located at the outer side of the strap boss714to be spaced apart from the strap boss714at a predetermined interval. The protrusion accommodation part712may include a bore713configured to accommodate a coupling protrusion722of the second module720, and may be variously formed according to a shape of the coupling protrusion. Preferably, the protrusion accommodation part712may have a cylindrical shape to be easily coupled and separated. The number of protrusion accommodation parts712may be one or more. Further, two pairs of protrusion accommodation parts712may be formed above and below the strap boss714located at the center portion at predetermined intervals.

Continuing to refer toFIG. 12, the second module720includes a second base721, a second slot724, and at least one coupling protrusion722. The second base721may have a thin plate shape having a circular shape, a polygonal shape, or the like. Preferably, the second base721may have a shape corresponding to that of the first base711.

According to the embodiment, the second base721includes a bent portion723having an inclination angle and inclined toward the outside, and the second slot724located at a base center portion.

The bent portion723may serve as a handle configured to allow the coupled strap guide700to be easily separated. Further, the bent portion723may be formed at one side of the second base721without limitation of a particular location in the second base721. However, preferably, the bent portion723may be formed in a lower portion of the second base721so that the strap guide700may be easily separated from the storage unit1000for welding wire. The inclination angle of the bent portion723is appropriate when it is an angle which allows fingers to enter between the first module710and the second module720to separate the coupled strap guide700and allows a force to separate the strap guide700be smoothly transferred, and the inclination angle of the bent portion723may preferably be 10° to 20°.

The coupling protrusion722may be located at an outer circumferential portion of the second slot724to be spaced apart from the second slot724at a predetermined interval, and forms a pair with the protrusion accommodation part712of the first module710when being coupled. The number of coupling protrusions722may be one or more and the number of coupling protrusions722may preferably be determined according to the number of protrusion accommodation parts712.

According to the embodiment, two pairs of coupling protrusions722may be formed above and below the second slot724located at the center portion at predetermined intervals. A shape of the coupling protrusion722may be formed in a shape corresponding to that of the bore713of the protrusion accommodation part712. Preferably, the coupling protrusion722may have a cylindrical shape which may be easily coupled and separated, and a corner portion of the cylinder may have a gentle round shape.

FIG. 13shows a cutaway view of the storage unit for welding wire to which the strap guide according to the embodiment of the present disclosure is coupled and a partial enlarged view of an edge of the opening.

Referring toFIGS. 11A, 11B, and 13, since the first module710and the second module720are coupled to each other, an outer surface of the first base711, an inner circumferential surface of the strap boss714, and an outer surface of the second base721are connected, and the opening730having a single closed surface may be formed.

When a process of moving and storing the storage unit1000for welding wire using the strap500is repeated over and over, an edge of the accommodation space part130of the storage unit1000for welding wire may become weak to external actions, and when the opening730having the single closed surface is formed, since various external actions may be blocked, durability of the storage unit1000for welding wire may be improved. Further, the strap500may pass through the opening730and may be supported by an edge731of the opening730.

According to the embodiment, the edge731of the opening730which comes into contact with the strap500may have a gentle round shape to improve a supporting force of the strap500. In this case, since an area in which the strap500and the edge731of the opening730come into contact with each other increases, the strap500may be more solidly and safely supported.

Referring toFIGS. 10 and 11, the accommodation space part130may include a center space part131into which the strap boss714is fitted, and an upper space part132and a lower space part133into which the protrusion accommodation parts712are fitted, and the strap guide700may be fitted into the accommodation space part130. The center space part131may be formed according to the shape of strap boss714and the upper space part132and the lower space part133may be formed according to shapes of the protrusion accommodation part712. As described above, when the strap guide700is coupled to the accommodation space part130in a fitting manner, the strap guide700and the storage unit1000for welding wire are engaged without shaking and do not rotate in a coupled state, and thus are stable. A shape in which the protrusion accommodation parts712are fitted into the upper space part132and the lower space part133may be changed according to the number of protrusion accommodation parts712.

Referring toFIGS. 11 and 13, a height of the strap boss714may be greater than or equal to a thickness of the outer case100to protect the storage unit1000for welding wire made of paper. In this case, since the thickness of the outer case100does not exceed the height of the strap boss714but is less than or equal to the height of the strap boss714in a state in which the first module710and the second module720are securely coupled and thus the outer case100may be protected from an external influence, the durability of the storage unit1000for welding wire may be improved.

Continuing to refer toFIGS. 11 and 13, the storage unit1000for welding wire may be formed in a double-layer structure of the outer case100and the inner case300, and in this case, the storage unit1000for welding wire may be a storage unit1000for welding wire in which the first module710is disposed in an interspace part800between the outer case100and the inner case300of the storage unit1000for welding wire and the second module720passes through the accommodation space part130formed in a side portion of the outer case100of the storage unit1000for welding wire to be coupled to the first module710.

Referring toFIGS. 1, 4, 5, and 13, the storage unit1000for welding wire according to the embodiment of the present disclosure further includes a strap500. The strap500may be formed of a synthetic resin such as nylon, polyester, or the like. A center portion501of the strap500may be disposed between the outer bottom supporting part102and the bottom part200. Further, both end portions502of the strap500may be exposed to the accommodation space part130formed to face the outer surface105of the outer case100or the opening730of the strap guide700coupled to the accommodation space part130to form engaging portions510.

When the welding wire is stored in the storage unit1000for welding wire according to the present disclosure, the center portion501of the strap500is pressed by the welding wire. Further, arms (not shown) of a lifting device are inserted into both engaging portions510and the storage unit1000for welding wire is carried in a state of being spaced apart from the ground. In this case, the strap500may stably support the welding wire.

Further, the strap500may be disposed without being adhered to the outer case100so that the engaging portion510at the other side may move when the engaging portion510at one side is pulled. Accordingly, the strap500is conveniently assembled and is easily separated when the storage unit1000for welding wire of the present disclosure is discarded.

Further, since the bottom part200and the like are disposed on the strap500and the welding wire is accommodated on the bottom part200and the like to be carried even when the strap500and the outer case100are coupled without being adhered to each other, the strap500does not easily move due to the weight of the welding wire. Accordingly, the welding wire becomes stable to be accommodated and carried.

According to an aspect of the present disclosure, since an outer case includes a strength reinforcement part and a shock absorption part and an inner case is closely coupled to the inside of the outer case, a storage unit for welding wire is not dented or damaged and an inner welding wire can be stably protected even when an external impact is applied.

Further, buckling does not occur even when the storage units for welding wire according to the present disclosure are vertically stacked.

In addition, since the storage unit for welding wire can be made of a paper material, an addition made of other materials such as metal, plastic, or the like to reinforce the storage unit is not necessary, and a strap is easily disassembled, disassembling and recycling the storage unit for welding wire is easy. In addition, transportation costs required to recycle the used storage unit for welding wire and costs necessary to process the storage unit for welding wire as industrial waste can be reduced.

In addition, since the outer side of the strength reinforcement part can be coated with a synthetic resin having watertightness, the inside can be protected from external moisture or the like.

In addition, since a lower portion of the storage unit for welding wire is formed in a five-layer structure by an outer bottom supporting part, a bottom part, a bottom reinforcement part, an elasticity retaining plate, and an inner bottom supporting part, the storage unit for welding wire can stably bear a weight of the welding wire accommodated therein, and can stably protect the welding wire from a load and shock in a vertical direction.

In addition, the storage unit for welding wire having an accommodation space part into which a strap guide can be fitted is stable because the strap guide does not rotate and can be engaged without shaking when the storage unit is lifted or moves.

In addition, since a first module and a second module are coupled to the accommodation space part of the storage unit for welding wire to form an opening of the strap guide having a single closed surface, the storage unit for welding wire can be safely protected from external actions.

In addition, since an edge of the opening of the strap guide is processed to be round, the strap can be solidly and safely supported.

In addition, due to the second module of the strap guide including a bent portion having an inclination angle and inclined toward the outside, the strap guide coupled to the storage unit for welding wire can be easily separated by hand.

In addition, since the inner case includes at least one cut portion in an outer surface thereof, the inner case made of a solid hard board can be easily discarded and the time for discarding can be reduced.

Effects of the present disclosure are not limited to the above-described effects and should be understood to include all effects inferable from the detailed description of the present disclosure or configurations of the present disclosure disclosed in the claims.

The above description of the present disclosure is exemplary, and it may be understood by those skilled in the art that the present disclosure may be easily modified into other specific forms without changing the technical spirit or essential characteristics. Accordingly, the above-described embodiment should be understood to be wholly exemplary and not limited. For example, elements described as a single type may be implemented to be divided, and elements described as being divided may be implemented as a coupled type.

The scope of the present disclosure is shown by the claims which will be described below, and all modifications and modified forms derived from the meanings and the scope of the claims and the equivalents should be included in the scope of the present disclosure.