Patent Description:
In the conventional and general large storage containers for a welding wire, a welding wire is accommodated in a coiled shape in a case body, an inner surface of the case body is sheathed with a resin, an opening part of an upper end of the case body is covered by a cover formed of a metal material, and a boundary between the case body and the cover is sealed by a sealing member such as rubber. In addition, in the case body of the storage container, a lower end portion and an upper end portion, which are portions requiring strength, are reinforced by metal members having ring shapes.

Meanwhile, there are cases in which a storage container is repeatedly used for accommodating a welding wire after used, but the storage container is generally discarded after being used a predetermined number of times. Before the storage container is discarded, the metal members formed of the metal material and having the ring shape and the cover need to be separated from the case body. If not, while all the metal members having the ring shape and the cover are not separated, the metal members are treated as industrial waste. Accordingly, a recycling process of the conventional storage container is complex and non-eco-friendly.

Accordingly, efforts to eliminate reinforcing members such as metal members or plastic members for reinforcing strength and manufacture an entire storage container using a paper material have been recently continued.

However, paper-based storage containers are vulnerable to external impacts compared to the conventional storage containers. In addition, in a state in which welding wires are accommodated in the paper-based storage containers, when the paper-based storage containers are stacked in two stages, there is a problem that the lower storage container should overcome a buckling load applied from the upper storage container.

In addition, storage containers for a welding wire may be divided into a single type, which is used after connecting a welding wire wound in a next container and a withdrawal device when a welding wire wound in one container is all exhausted, or an endless type which is continuously used after coupling two storage containers in a tandem manner and connecting a last end of a wire wound in one storage container and a leading end of a wire wound in another storage container when the wire in the one storage container is almost exhausted.

In this case, according to the conventional technique, there is a problem that production costs increase because a cover should be separately manufactured and supplied according to a type of a storage container for a welding wire required by a consumer.

A storage container for a welding wire comprising the features of the preamble portion of claim <NUM> is known from <CIT>.

Further storage containers for welding wires are known from <CIT>, <CIT>, <CIT>, and <CIT>.

The present invention is intended to solve the problems of the conventional technique and directed to providing a storage container for a welding wire which does not require a separate head cap member because of including a cover having a perforated portion which is easy to recycle, is resistant to an external impact and buckling load, and is easily torn for using.

The present invention provides a storage container for a welding wire comprising the features of claim <NUM>. Advantageous embodiments are set out in further claims.

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

In addition, even when storage containers for a welding wire of the present invention are vertically stacked, buckling does not occur.

In addition, since a storage container for a welding wire can be manufactured of a paper material there is no need for separate parts of other materials such as a metal and plastic to reinforce the storage container, and a strap is easily disassembled, the storage container for a welding wire is easily dissembled and recycled.

In addition, after a welding wire is all used, transportation costs required to recycle a storage container for a welding wire and costs required to discard the storage container for a welding wire as industrial waste can be reduced.

In addition, a cover includes a perforated portion and can be directly used without a separate head cap member and implemented as an adapter connection type or an endless type according to an application.

In addition, a ratio of a cut portion per unit length of a perforated portion is different for each portion, and thus the perforated portion can be removed more efficiently.

In addition, a cover can be manufactured by assembling a side surface forming part and a side surface fixing part. Such a cover can be manufactured without a separate fastening member, and a manufacturing process is simple.

Effects of the present invention are not limited to the above-described effects, and it should be understood that the effects of the present invention include any effect which may be inferred from the configuration of the invention described in the detailed description and the claims of the present invention.

However, embodiments of the present invention may be implemented in several different forms and are not limited to embodiments described herein. In addition, parts irrelevant to description are omitted in the drawings in order to clearly explain embodiments of the present invention. Similar parts are denoted by similar reference numerals throughout this specification.

Throughout this specification, when a part is referred to as being "connected" to another part, it includes being "directly connected" and "indirectly connected" via an intervening part. Also, when a certain part "includes" a certain component, this does not exclude other components unless explicitly described otherwise, and other components may be further included.

<FIG> is a perspective view illustrating an exterior of a storage container for a welding wire according to one embodiment of the present invention. In addition, the storage container for a welding wire of the present invention may be formed of a paper material.

Referring to <FIG>, an exterior of a storage container <NUM> for a welding wire may be formed by an outer case <NUM> and a cover <NUM>. The outer case <NUM> may have a polygonal column shape, and a cross section thereof may have a regular <NUM> dodecagon. An upper portion of the outer case <NUM> is formed to open toward the outside. The cover <NUM> may have a polygonal column shape corresponding to the shape of the outer case <NUM> and having an internal space portion. The cover <NUM> closes the upper portion of the outer case <NUM> to protect an inner portion of the outer case <NUM>. When the cover <NUM> closes the upper portion of the outer case <NUM>, a part of the upper portion of the outer case <NUM> may be accommodated in the inner space portion of the cover <NUM>.

<FIG> is a perspective view illustrating the outer case according to one embodiment of the present invention, <FIG> are a plan view illustrating the outer case from above and a partially enlarged view illustrating a strength reinforcement part and a shock absorption part of the outer case of the present invention, respectively, and <FIG> is a bottom view illustrating the outer case from below.

Referring to <FIG>, the outer case <NUM> may have the polygonal column shape, an outer bottom support <NUM> may be formed in a lower portion of the outer case <NUM>, and a wire accommodation portion <NUM> capable of accommodating a wound welding wire (not shown) may be formed in the outer case <NUM>. In addition, an inner case, which will be described below, may be positioned in close contact with an inner surface <NUM>.

The outer case <NUM> may include a strength reinforcement part <NUM> and a shock absorption part <NUM> formed inside the strength reinforcement part <NUM> to absorb an external impact.

The strength reinforcement part <NUM> includes a first paperboard <NUM> and a first fluted paper <NUM>. A cross-sectional shape of the first fluted paper <NUM> may have a shape of a waveform of a substantial sin function. Due to the shape of the first fluted paper <NUM>, a strength against a compressive load and a strength against a buckling load of the strength reinforcement part <NUM> can be improved. In addition, the first paperboard <NUM> may be formed of a first outer paperboard 112a and a first inner paperboard 112b.

The shock absorption part <NUM> includes a second paperboard <NUM> and a second fluted paper <NUM>. A cross-sectional shape of the second fluted paper <NUM> may have a shape in which substantial pentagons are repeatedly disposed. Due to the shape of the second fluted paper <NUM>, an impact force applied to the shock absorption part <NUM> is effectively absorbed. In addition, the second paperboard <NUM> may be formed of a second outer paperboard 122a and a second inner paperboard 122b. Meanwhile, according to one embodiment of the present invention, the first inner paperboard 112b and the second outer paperboard 122a may be integrally formed.

In addition, in the entire outer case <NUM>, the strength reinforcement part <NUM> is formed at an outer side, and the shock absorption part <NUM> is formed at an inner side, and thus, when an impact is applied, the outer case <NUM> is not dented or broken, and the impact is not transmitted to a welding wire accommodated internally. Accordingly, even when another storage container <NUM> for a welding wire, which stores a welding wire, is stacked on the storage container <NUM> for a welding wire and applies a load thereto, the outer case <NUM> of the storage container <NUM> for a welding wire positioned at a lower side is not buckled.

According to one embodiment of the present invention, an outer side of the strength reinforcement part <NUM> may be coated with a watertight synthetic resin. Accordingly, an inner portion can be protected from outside moisture or the like.

In one embodiment of the present invention, when the number of valleys 111a per unit length of the first fluted paper is C1, and the number of valleys 121a per unit length of the second fluted paper is C2, RC=C1/C2 may be in the range of <NUM> to <NUM>, and preferably <NUM> to <NUM>.

When RC is less than <NUM>, a strength of the strength reinforcement part <NUM> may decrease, and thus the outer case <NUM> may be dented or broken. In some cases, the shock absorption part <NUM> may become resistant to an external impact, and thus the external impact may be transmitted to a welding wire accommodated internally, and the welding wire may be damaged.

Meanwhile, when RC is greater than <NUM>, ease of manufacturability may be significantly degraded, or an impact absorption capacity of the shock absorption part <NUM> may be reduced.

Accordingly, as RC becomes a value within the numerical range, a strength and an impact absorption effect of the outer case <NUM> can be optimized.

According to one embodiment of the present invention, a thickness d2 of the shock absorption part <NUM> may be greater than a thickness d1 of the strength reinforcement part <NUM>. Accordingly, the strength reinforcement part <NUM> can serve to provide a strength to the outer case <NUM>, and the shock absorption part <NUM> can easily absorb an external impact applied to the outer case <NUM>.

When the outer case <NUM> is viewed from below, the outer bottom support <NUM> may have a polygonal shape having an outer side having a middle side 102a, a first side 102b, and a second side 102c and an inner side 102d having a length smaller than a length of the outer side, and may preferably have a hexagonal shape. In addition, the middle side 102a of the outer bottom support <NUM> may be integrally formed with an outer surface <NUM> to extend from the outer surface <NUM>, and the first side 102b and the second side 102c may be formed to be cut from the outer surface <NUM>. Accordingly, the outer bottom support <NUM> may be folded or unfolded along the middle side 102a. Such an outer bottom support <NUM> may be provided as a plurality of outer bottom supports <NUM>, and each of the outer bottom supports <NUM> may be folded inward to form an outer bottom of the outer case <NUM>. In addition, the outer bottom support <NUM> may also be formed to have a structure like the strength reinforcement part <NUM> (see <FIG>) and the shock absorption part <NUM> (see <FIG>).

<FIG> is a cutaway view illustrating a state in which the outer case, a bottom part, the bottom reinforcement part, an elastic body maintaining member, and a strap are coupled according to one embodiment of the present invention, and <FIG> are partially enlarged views illustrating portions of <FIG>.

Referring to <FIG>, a bottom part <NUM> may have a polygonal shape corresponding to a cross-sectional shape of the outer case <NUM> and may be seated on and coupled to the outer bottom support <NUM>. The bottom part <NUM> may also be formed to have a structure like the strength reinforcement part <NUM> (see <FIG>) and the shock absorption part <NUM> (see <FIG>). Accordingly, the bottom part <NUM> may not be easily dented or broken even by an external force applied in a vertical direction of the outer case <NUM>, and the external force can be easily absorbed thereby to stably protect a welding wire accommodated internally.

A bottom reinforcement part <NUM> may be disposed on the bottom part <NUM>. In addition, the bottom reinforcement part <NUM> may also be formed to have a structure like the strength reinforcement part <NUM> (see <FIG>) and the shock absorption part <NUM> (see <FIG>). Accordingly, the bottom reinforcement part <NUM> can easily absorb an impact applied when a welding wire is accommodated.

In a central portion of each of the bottom part <NUM> and the bottom reinforcement part <NUM>, a cut groove (not shown) to which an elastic body maintaining member <NUM>, which will be described below, may be insertion-coupled is formed.

The elastic body maintaining member <NUM> includes an insertion part <NUM> which is inserted upward through the cut groove (not shown) from below and an insertion support <NUM> which is formed under the insertion part <NUM> to set an insertion limit.

In this case, the insertion part <NUM> includes a hook portion <NUM> which is formed in a circular shape to hook an elastic body and a through path <NUM> which is formed to pass through from the outside of the insertion part <NUM> to the hook portion <NUM> so that the outside of the insertion part <NUM> communicates with the hook portion <NUM>. That is, the elastic body may be moved into and easily coupled to the hook portion <NUM> through the through path <NUM>.

The insertion support <NUM> is formed to support a lower surface of the bottom part <NUM> when the insertion part <NUM> is insertion-coupled through the cut groove (not shown). That is, the insertion part <NUM> is inserted until the insertion support <NUM> comes into contact with the lower surface of the bottom part <NUM>, and when the insertion part <NUM> is completely inserted, the insertion support <NUM> supports the lower surface of the bottom part <NUM>. At least two insertion supports <NUM> may be formed under the insertion part <NUM> in a lateral direction.

The elastic body maintaining member <NUM> may be formed of a paper material, and thus, when a welding wire accommodated in the storage container <NUM> for a welding wire of the present invention is completely exhausted, a user may easily grasp the insertion support <NUM> and pull the insertion support <NUM> downward from above to separate the insertion part <NUM> from the cut groove (not shown) so as to easily discard the insertion support <NUM>.

<FIG> are a cutaway view illustrating the inner case and a partially enlarged view illustrating a portion of <FIG>, respectively.

Referring to <FIG>, an inner case <NUM> may have a cylindrical column shape. An inner bottom support <NUM> may be formed in a lower portion of the inner case <NUM>, and a wire accommodation portion <NUM>, which may store a wound welding wire (not shown), may be formed in the inner case <NUM>. In addition, the inner case <NUM> may be detachably inserted into the outer case <NUM>, and when the inner case <NUM> is inserted into the outer case <NUM>, an outer surface <NUM> of the inner case <NUM> is in close contact with the inner surface <NUM> of the outer case <NUM>. In this case, an upper end portion <NUM> of the outer case <NUM> and an upper end portion <NUM> of the inner case <NUM> may be formed at the same level.

The inner case <NUM> may be formed of a paper material. Specifically, since the inner case <NUM> may be formed of a hardboard material formed by pressing several paperboards, the cylindrical shape can be firmly maintained.

The inner bottom support <NUM> may be formed to have a structure like the strength reinforcement part <NUM> (see <FIG>) and the shock absorption part <NUM> (see <FIG>). Preferably, the inner bottom support <NUM> may be formed to have a structure in which two structures each having the strength reinforcement part <NUM> (see <FIG>) and the shock absorption part <NUM> (see <FIG>) are stacked in two stages. Accordingly, an impact applied when a welding wire is accommodated can be easily absorbed.

A hole <NUM> may be formed in a central portion of the inner bottom support <NUM>. The insertion part <NUM> of the elastic body maintaining member <NUM> may be exposed through the hole <NUM>, and the hook portion <NUM> of the insertion part <NUM> may be coupled to a tension spring.

<FIG> are an exploded assembly view illustrating a state in which the inner case is inserted into the outer case along an axis L and the cover is covered on upper portions of the inner and outer cases and a view illustrating a state in which the outer case and the inner case of the present invention are coupled, respectively.

Referring to <FIG>, the outer case <NUM> and the inner case <NUM> may be assembled by inserting the inner case <NUM> into the outer case <NUM> to bring the inner surface <NUM> of the outer case <NUM> into close contact with the outer surface <NUM> of the inner case <NUM> and coupling the cover <NUM> to an upper portion of each of the outer case <NUM> and the inner case <NUM>.

In addition, when the inner case <NUM> is inserted into the outer case <NUM>, a strap <NUM> may be interposed between the outer surface <NUM> of the inner case <NUM> and the inner surface <NUM> of the outer case <NUM>. Accordingly, the strap <NUM> except for a portion exposed to the outside of the outer case <NUM> is stably maintained by a friction force between the inner case <NUM> and the outer case <NUM>.

Referring to <FIG>, <FIG>, and <FIG>, the outer case <NUM> and the inner case <NUM> may be coupled so that a structure of three total layers is formed by the strength reinforcement part <NUM>, the shock absorption part <NUM>, and the inner case <NUM>. Accordingly, the storage container <NUM> for a welding wire of the present invention can stably protect a welding wire accommodated therein against an external impact applied in the lateral direction and may not be bent or broken even when a buckling load is applied from above.

Referring to <FIG> and <FIG>, when the outer case <NUM> and the inner case <NUM> are coupled, a structure of four total layers may be formed by the outer bottom support <NUM>, the bottom part <NUM>, the bottom reinforcement part <NUM>, and the inner bottom support <NUM>. Accordingly, a weight of a welding wire accommodated internally can be stably supported, and the welding wire can be stably protected against a vertical load and an impact applied to the storage container <NUM> for a welding wire according to one embodiment of the present invention.

<FIG> is a perspective view illustrating a portion of the outer case according to one embodiment of the present invention.

Meanwhile, referring to <FIG>, and <FIG>, the storage container <NUM> for a welding wire according to one embodiment of the present invention further includes the strap <NUM>. The strap <NUM> may be formed of a synthetic resin material such as nylon or polyester. A central portion <NUM> of the strap <NUM> may be disposed between the outer bottom support <NUM> and the bottom part <NUM>. In addition, two end portions <NUM> of the strap <NUM> may be exposed through strap exposure parts <NUM> formed opposite to each other in a blocking part <NUM> of the cover <NUM>, which will be described below, to form hanging parts <NUM>.

When a welding wire is accommodated in the storage container <NUM> for a welding wire of the present invention, the central portion <NUM> of the strap <NUM> is pressed by the welding wire. In addition, arms (not shown) of a lifting device are inserted into hanging parts <NUM> at two sides, and the storage container <NUM> for a welding wire is transported in a state of being separated from the ground surface. In this case, the strap <NUM> can stably support a weight of the welding wire.

In addition, the strap <NUM> may be disposed so that, when the hanging part <NUM> at one side is pulled, the hanging part <NUM> at the other side may be moved in a state in which the strap is not stuck to the outer case <NUM>. Accordingly, it is not only easy to assemble, but also easy to separate when the storage container <NUM> for a welding wire of the present invention is discarded.

In addition, even when the strap <NUM> and the outer case <NUM> are not stuck to each other, since the bottom part <NUM> or the like is disposed on the strap <NUM>, and a welding wire is accommodated thereon and transported, the strap <NUM> is not easily moved because of a weight of the welding wire. Accordingly, it is stable in accommodating and transporting the welding wire.

<FIG> is a development view illustrating the cover according to one embodiment of the present invention, <FIG> is an assembly view of a main portion for showing a process of assembling the cover according to one embodiment of the present invention, and <FIG> is a perspective view illustrating the assembled cover according to one embodiment of the present invention.

Referring to <FIG>, the cover <NUM> of the present invention forms the cover <NUM> of the storage container for a welding wire through assembly. The cover <NUM> is formed to be attached to and detached from the upper portion of the outer case <NUM> and to selectively close the upper portion of the outer case <NUM>.

Such a cover <NUM> may be formed of a paper material. Accordingly, when the storage container <NUM> for a welding wire is discarded, the assembly type cover <NUM> may be recycled into waste paper.

The cover <NUM> of the present invention includes the blocking part <NUM>, a side surface forming part <NUM>, and a side surface fixing part <NUM>.

The blocking part <NUM> is formed in a shape corresponding to a cross section of the outer case <NUM>.

The blocking part <NUM> covers the upper portion of the outer case <NUM> when the cover <NUM> is coupled to the outer case <NUM>.

The side surface forming part <NUM> is bent from the blocking part <NUM> to form a side surface of the cover <NUM>. Such a side surface forming part <NUM> surrounds and is fitted onto an outer surface of the upper portion of the outer case <NUM> when coupled to the outer case <NUM>.

The side surface forming part <NUM> and the side surface fixing part <NUM> are alternately connected to sides of the blocking part <NUM>. That is, the side surface forming part <NUM> and the side surface fixing part <NUM> are alternately provided along the sides of the blocking part <NUM>.

The side surface forming part <NUM> includes a side surface extension member <NUM> and a wing member <NUM>.

The side surface extension member <NUM> has a width corresponding to the side of the blocking part <NUM> and extends from the blocking part <NUM>. In this case, a length of the side surface extension member <NUM> extending from the blocking part <NUM> becomes a height of the cover <NUM>.

The wing member <NUM> is provides as a pair of wing members <NUM> connected to two sides of the side surface extension member <NUM>. An edge of the wing member <NUM> is formed in contact with a first fixing extension member <NUM>, a connection member <NUM>, and a second fixing extension member <NUM> in a state in which the side surface forming part <NUM> and the side surface fixing part <NUM> are deployed. Such a wing member <NUM> may be manufactured through an operation of cutting a boundary line L in a state of being connected to the first fixing extension member <NUM>, the connection member <NUM>, and the second fixing extension member <NUM>.

The side surface forming part <NUM> having the side surface extension member <NUM> and the wing member <NUM> is bent from the blocking part <NUM> to form a side portion of the cover <NUM>.

Meanwhile, the side surface fixing part <NUM> and the side surface forming part <NUM> are alternately provided along the sides of the blocking part <NUM>, and the side surface fixing part <NUM> fixes the adjacent side surface forming part <NUM>.

The side surface fixing part <NUM> includes the first fixing extension member <NUM>, the connection member <NUM>, and the second fixing extension member <NUM>.

The first fixing extension member <NUM> extends from the side of the blocking part <NUM>. In this case, the first fixing extension member <NUM> fixedly supports an outer surface of the wing member <NUM> bent from the side surface extension member <NUM>.

The connection member <NUM> is formed to connect the first fixing extension member <NUM> and the second fixing extension member <NUM>. That is, one end portion of connection member <NUM> is connected to first fixing extension member <NUM>, and the other end portion of connection member <NUM> is connected to the second fixing extension member <NUM>.

In this case, the connection member <NUM> extends to a predetermined length from the first fixing extension member <NUM>. Due to the connection member <NUM>, a separation distance between the first fixing extension member <NUM> and the second fixing extension member <NUM> is formed so that the first fixing extension member <NUM> and the second fixing extension member <NUM>, which are bent from the two end portions of the connection member <NUM>, fixedly support the wing member <NUM>.

The second fixing extension member <NUM> is connected to the other end portion of the connection member <NUM> and fixedly supports an inner surface of the wing member <NUM> bent from the side surface extension member <NUM>. That is, the second fixing extension member <NUM> is bent from the other end portion of the connection member <NUM> and fixedly supports the inner surface of the wing member <NUM>.

An insertion member <NUM> may be provided on an end portion of the second fixing extension member <NUM> so that the side surface fixing part <NUM> may be fixedly supported by the blocking part <NUM>. Specifically, a fitting hole <NUM> is formed in a central portion of the side of the blocking part <NUM> to which the side surface fixing part <NUM> extending from the blocking part <NUM> is connected. The insertion member <NUM> may be insertion-coupled to the fitting hole <NUM>, and the side surface fixing part <NUM> may be coupled to the blocking part <NUM> in a state of fixedly supporting the wing member <NUM>.

In this case, the insertion member <NUM> and the fitting hole <NUM> may be coupled in a forced fitting manner.

A specific shape of the side surface fixing part <NUM> based on the development view of <FIG> is that a width of the first fixing extension member <NUM> gradually decreases as extending from the blocking part <NUM>. That is, the first fixing extension member <NUM> is formed in a trapezoidal shape of which the width decreases outward from the blocking part <NUM>.

In addition, the second fixing extension member <NUM> is formed in a shape of which a width increases as extending from the other end portion of the connection member <NUM>. That is, the second fixing extension member <NUM> is formed in an inverted trapezoidal shape of which the width increases as extending outward from the blocking part <NUM>.

As described above, as the first fixing extension member <NUM> is formed so that a width decreases toward the connection member <NUM>, a length of the wing member <NUM> inserted into a separation space of the first fixing extension member <NUM> and the second fixing extension member <NUM> may increase.

In addition, as the second fixing extension member <NUM> is formed so that the width increases as extending from the connection member <NUM>, a support area for the wing member <NUM> increases, and thus the side surface fixing part <NUM> firmly supports the side surface forming part <NUM>.

Such a cover <NUM> is easy to manufacture because of a simple assembly structure.

In addition, since a separate fastening member for fastening the cover <NUM> is not required, manufacturing costs of the cover <NUM> can be reduced.

In addition, since the cover <NUM> is formed of the paper material, additional industrial waste is not generated when the cover <NUM> is discarded.

<FIG> are views illustrating a first perforated portion and a second perforated portion included in the cover according to one embodiment of the present invention, respectively.

Referring to <FIG>, the cover <NUM> of the present invention may further include a perforated portion <NUM> which is formed in the blocking part <NUM> to be cut so that a welding wire wound in the case body is withdrawn.

The perforated portion <NUM> may be formed to be partially cut according to a particular shape and easily torn by the user. That is, the user may directly use the cover <NUM> without using a separate head cap member and may withdraw and use the welding wire through a portion torn along the perforated portion <NUM>.

The perforated portion <NUM> may include a first perforated portion <NUM> and a second perforated portion <NUM> which are formed to be used according to a user's intention to use.

In this case, the first perforated portion <NUM> is used when the storage container <NUM> for a welding wire is used as an adapter connection type, and the second perforated portion <NUM> is used when the storage container <NUM> for a welding wire is used as an endless type.

That is, the storage container <NUM> for a welding wire for two application types can be implemented through the cover <NUM> including the first perforated portion <NUM> and the second perforated portion <NUM>.

Referring to <FIG>, the first perforated portion <NUM> may be formed at a center of the blocking part <NUM> and formed in a circular shape.

In this case, a coupling hole <NUM> may be formed in a portion torn along the first perforated portion <NUM>, and a connection adopter <NUM>, which will be described below, may be coupled through the coupling hole <NUM>.

That is, the first perforated portion <NUM> is used when the storage container <NUM> for a welding wire is used as the adapter connection type.

According to one embodiment, the first perforated portion <NUM> may include a first arc part 641a and a second arc part 641b in which ratios of cut portions c per unit length d is different from each other. Preferably, the first arc part 641a and the second arc part 641b may be formed to have semicircular arc shapes.

In this case, a ratio R1 of the cut portion per unit length of the first arc part 641a may be greater than a ratio R2 of the cut portion per unit length of the second arc part 641b.

Accordingly, when the user uses fingers to tear off the first perforated portion <NUM>, the first arc part 641a having the higher ratio of the cut portion per unit length is torn first, and then the second arc part 641b having the lower ratio of the cut portion per unit length may be torn so that the first perforated portion <NUM> can be more easily torn.

Referring to <FIG>, the second perforated portion <NUM> may be formed lengthily from one side of the blocking part <NUM> to a central portion of the blocking part <NUM>.

More specifically, the second perforated portion <NUM> may include a first straight portion 642a and a second straight portion 642b which are formed in parallel from one side to the central portion of the blocking part <NUM>, a curved portion 642c formed in the central portion of the blocking part <NUM> to connect the first straight portion 642a and the second straight portion 642b, and a third straight portion 642d which overlaps one side of the blocking part <NUM> to connect the first straight portion 642a and the second straight portion 642b.

In this case, a withdrawal space portion <NUM> may be formed in a portion torn along the second perforated portion <NUM>, and a welding wire wound in the storage container may be withdrawn through the withdrawal space portion <NUM>.

Accordingly, when the storage container <NUM> for a welding wire is used as the endless type which will be described below, withdrawal space ports <NUM> of two storage containers disposed adjacent to each other may be connected to each other, and thus the user can more easily implement the endless type storage container.

Meanwhile, the second perforated portion <NUM> may be formed so that the first perforated portion <NUM> formed at the center of the blocking part is positioned in an area surrounded by the second perforated portion <NUM>.

Accordingly, when the cover <NUM> is used as the adapter connection type and discarded, the cover <NUM> may be quickly removed due to the second perforated portion <NUM> even without separation of the coupled connection adopter <NUM>, and thus disposal efficiency can be improved.

According to the one embodiment, at least one of the curved portion 642c and the third straight portion 642d may have a different ratio of the cut portion c per unit length d from that of the first and second straight portions 642a and 642b.

That is, a ratio R3 of the cut portion per unit length of at least one of the curved portion 642c and the third straight portion 642d may be greater than a ratio R4 of the cut portion per unit length of the first straight portion 642a and the second straight portion 642b.

Accordingly, when the user uses fingers to tear off the second perforated portion <NUM>, the curved portion 642c or the third straight portion 642d having the higher ratio of the cut portion per unit length may be torn first, and then the first straight portion 642a and the second straight portion 642b may be torn, so that the second perforated portion <NUM> can be torn more easily.

The cover <NUM> of the present invention may further include the strap exposure part <NUM> which is formed in the blocking part <NUM> to be cut so that the strap <NUM> is exposed to the outside.

The strap <NUM> may be exposed to the outside through an opening formed after the strap exposure part <NUM> is removed.

<FIG> are an exploded view and a coupling view illustrating the connection adopter according to one embodiment of the present invention, respectively, and <FIG> is a sequence diagram illustrating a process in which the connection adopter is coupled to the cover according to one embodiment of the present invention.

A case in which the cover <NUM> is used as the adapter connection type will be described with reference to <FIG> and <FIG>. The cover <NUM> of the present invention may further include the connection adopter <NUM> which is detachably coupled through the coupling hole <NUM> formed when the first perforated portion <NUM> is removed.

The connection adopter <NUM> may be formed to be easily and quickly coupled through the coupling hole <NUM> and formed of a hard material such as metal.

A welding wire wound in the storage container may be used as a welding material which is guided to the outside by the connection adopter <NUM> while continuously being withdrawn through a cable member <NUM> coupled to the connection adopter <NUM>.

The connection adopter <NUM> may include a connection part <NUM>, a first washer <NUM>, a second washer <NUM>, and a nut <NUM>.

The connection part <NUM> is a part forming a body of the connection adopter <NUM> and may include a support <NUM>, a first bolt part <NUM> formed on the support <NUM>, a second bolt part <NUM> formed under the support <NUM>, and a through hole formed to pass in a central axis direction of the connection part <NUM>.

In this case, the welding wire wound in the storage container may be withdrawn to the outside through the through hole.

The support <NUM> is a part which is in contact with and supported by an upper portion of the blocking part <NUM> when the connection adopter <NUM> is coupled and integrally formed with the first bolt part <NUM> and the second bolt part <NUM>.

In addition, the support <NUM> is disposed between the first and second bolt parts <NUM> and <NUM> to support the first and second bolt parts <NUM> and <NUM>, and a diameter of the support <NUM> may be greater than a diameter of each of the first and second bolt parts <NUM> and <NUM>.

The second bolt part <NUM> is inserted through the coupling hole <NUM> formed in the blocking part <NUM> and is no longer inserted when a lower portion of the support <NUM> comes into contact with and is supported by the upper portion of the blocking part <NUM>.

In this case, the first washer <NUM> may be provided between the upper portion of the blocking part <NUM> and the lower portion of the support <NUM>. The first washer <NUM> is a part having a ring shape in which an inner hole is formed and serves to protect an upper surface of the blocking part <NUM> by dispersing a pressure when coupled.

That is, the first washer <NUM> is fitted onto the second bolt part <NUM> of the connection part <NUM>, and the second bolt part <NUM> is inserted into the coupling hole <NUM> of the blocking part <NUM> in a state in which the first washer <NUM> is fitted onto the second bolt part <NUM>.

The nut <NUM> is coupled to the second bolt part <NUM> under the blocking part <NUM> when the second bolt part <NUM> is inserted into the coupling hole <NUM>.

In this case, the second washer <NUM> may be provided between a lower portion of the blocking part <NUM> and an upper portion of the nut <NUM>. The second washer <NUM> is a part having a ring shape in which an inner hole is formed and serves to protect a lower surface of the blocking part <NUM> by dispersing a pressure when coupled.

When the connection adopter <NUM> is coupled to the cover <NUM>, the cable member <NUM> for withdrawing the welding wire may be connected to the first bolt part <NUM>.

As described above, the connection adopter <NUM> may be firmly and easily coupled to the cover <NUM> and easily removed from the cover <NUM> when the welding wire accommodated in the storage container is completely exhausted.

<FIG> is a perspective view illustrating a state in which the second perforated portion of the cover is used according to one embodiment of the present invention.

A case in which the cover <NUM> is used as the endless type will be described with reference to <FIG>. First, two storage containers are disposed adjacent to each other. In this case, in the two storage containers, the second perforated portions <NUM> provided in the covers <NUM> should be disposed to face each other.

Then, the second perforated portions <NUM> provided in the covers <NUM> are removed so that the withdrawal space portions <NUM> are formed in the covers <NUM>. In this case, the second perforated portions <NUM> may be more easily torn using the curved portions 642c or the third straight portions 642d in which the ratio of the cut portion per unit length is high.

In addition, a welding wire <NUM> wound in the storage container at one side is connected a withdrawal device <NUM> and used, and when the wound welding wire <NUM> is almost exhausted, a last end <NUM> of the welding wire <NUM> at one side is connected to a leading end <NUM> of a welding wire <NUM> wound in the storage container at the other side. In this case, the welding wires can be more easily connected because the second perforated portions <NUM> of the storage containers are adjacently disposed to face each other.

Accordingly, an endless welding wire can be used without reconnecting the withdrawal device <NUM> to a new welding wire.

Then, when the welding wire <NUM> wound in the storage container at one side is completely exhausted, the new storage container is disposed close like the beginning and the above process is repeated.

As described above, the user can more easily implement the endless type storage container using the cover <NUM> including the second perforated portion <NUM>.

Since the cover <NUM> of the present invention includes the perforated portion <NUM> and can be directly used without a separate head cap member and implemented as the adapter connection type or the endless type according to an application, there is an advantage of improving manufacturing efficiency.

As described above, since the storage container <NUM> for a welding wire of the present invention is formed of the paper material, the storage container <NUM> for a welding wire is easy to disassemble and recycle when the wound welding wire is all exhausted. Accordingly, costs required to discard the storage container for a welding wire as industrial waste can be reduced after the storage container for a welding wire is all used.

Claim 1:
A storage container for a welding wire, comprising:
an outer case (<NUM>) having a lower end at which an outer bottom support (<NUM>) is formed and an inner portion in which a wire accommodation portion (<NUM>) for accommodating a wound welding wire is formed;
a bottom part (<NUM>) seated on and coupled to the outer bottom support (<NUM>);
an inner case (<NUM>) which is in close contact with an inner surface of the outer case (<NUM>) and has a lower portion in which an inner bottom support (<NUM>) on which the bottom part (<NUM>) is seated is formed; and
a cover (<NUM>) which is formed to correspond to a shape of the outer case (<NUM>) and closes an upper portion of the outer case (<NUM>);
wherein the cover (<NUM>) includes:
a blocking part (<NUM>) which is formed in a shape corresponding to a cross section of the outer case (<NUM>) and closes the upper portion of the outer case (<NUM>); and characterized in that the cover (<NUM>) includes :
a perforated portion (<NUM>) formed in the blocking part (<NUM>) to be cut so that the welding wire wound in the outer case (<NUM>) is withdrawn to an outside,
wherein the perforated portion (<NUM>) includes a first perforated portion (<NUM>) formed in a circular shape in a central portion of the blocking part (<NUM>),
wherein the perforated portion (<NUM>) includes a second perforated portion (<NUM>) including:
a first straight portion (642a) and a second straight portion (642b) formed in parallel from one side of the blocking part (<NUM>) to the central portion of the blocking part (<NUM>);
a curved portion (642c) formed to connect the first straight portion (642a) and the second straight portion (642b) in the central portion of the blocking part (<NUM>); and
a third straight portion (642d) which overlaps the one side of the blocking part (<NUM>) and is formed to connect the first straight portion (642a) and the second straight portion (642b).