JP3359731B2 - Linear object storage container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for storing a linear object wound in a coil shape, and more particularly to a container for a linear object suitable for storing a welding wire.

[0002]

2. Description of the Related Art Wires such as welding wires are generally shipped in a state of being wound around a spool such as a spool. The winding frame is formed of a material having sufficiently high rigidity such as plastic, iron, or FRP (fiber reinforced plastic) in order to hold a heavy object.

Conventionally, in a wire feeding device for welding,
A welding wire wound around a winding frame such as a spool is mounted on a rotating shaft together with the winding frame, and the welding wire is sandwiched between a pair of wire feeding rollers which are arranged outside the motor and at least one of which rotates by a motor. It is designed to be sent out.

By the way, the bobbin after the use of the welding wire needs to be treated as industrial waste, which is complicated. In recent years, in operations involving movement of the wire feeding device due to semi-automatic welding or the like, there has been a demand for a reduction in the total weight of the wire feeding device in a state in which the welding wire is mounted, for reasons such as aging of the workers. Have been. Therefore, the present inventors have proposed a wire feeder that does not use a spool such as a spool (Japanese Patent Application No. 4-27119). This device has a coil case constituted by a flat bottom wall and a cylindrical inner wall, and a coil of a welding wire is fitted and arranged on the inner wall of the coil case. On the other hand, the welding wire is constrained by the constraining jig until use, instead of using the bobbin, and the coil shape is maintained. Further, Japanese Patent Application No. 4-27119 discloses various methods of packaging a coil-shaped welding wire.

[0005]

However, in the above-described method of restraining the welding wire in a coil shape by the restraining jig, when removing the restraining jig in order to attach the wire to the wire feeder, It is necessary to pay sufficient attention so that the wires do not come apart, and there is a disadvantage that the operation is complicated. In addition, in order to facilitate the mounting of the wire on the wire feeding device, it is preferable that the packaging of the wire is simple. Conventionally, however, relatively strict packaging is performed to ensure moisture absorption resistance during storage and to prevent vibration during transportation and wire dislocation due to handling.

The present invention has been made in view of the above problems, and does not use a bobbin, which is an industrial waste, and secures excellent moisture absorption resistance and anti-separation performance with relatively simple packaging. In particular, it is an object of the present invention to provide a linear object storage container which can be easily attached to a wire feeding device when used for storing a welding wire.

[0007]

SUMMARY OF THE INVENTION A linear object storage container according to the present invention is a linear object storage container for storing a coiled linear object, comprising an inner cylinder, an outer cylinder, and lower ends of the inner cylinder and the outer cylinder. A storage portion formed integrally with a bottom portion positioned between the storage portion and the coil-shaped linear object to be fitted and stored between the inner cylinder and the outer cylinder; and an upper end of the inner cylinder of the storage portion. A lid disposed in an opening between the upper end of the outer cylinder and the fitting of the linear object to the storage section, and then, by reducing the pressure in the storage section, the inner cylinder and And / or wherein the outer cylinder shrinks in the axial direction to accommodate the linear object.
In this case, the storage portion is formed of a pair of outer portions made of a moldable resin.
Layer and a gas-impermeable resin sandwiched between the outer layers.
Deep-drawing the sheet-like member of the three-layer laminate of the inner layer part
Is formed, or the storage portion is
With an upper bottom with a hole located between the upper ends of the tubes
It is.

[0008]

According to the present invention, a coil-shaped linear object is stored in a space of a storage section in which an inner cylinder, an outer cylinder and a bottom are integrally formed, and an upper end opening of the storage section is covered with a lid. It is designed to be airtightly closed. That is, by fitting the linear object between the inner cylinder and the outer cylinder of the storage section, disposing the lid in the opening, and then reducing the pressure in the storage section,
The inner cylinder and / or the outer cylinder contract in the axial direction, and the linear object is stored in this state. That is, in the present invention, the inside of the storage unit is depressurized, and the inner cylinder and / or the outer cylinder are contracted, so that the linear object and the storage container are brought into close contact with each other and the linear object is fixed. Thereby, it is possible to avoid disturbance of winding of the linear object due to vibration and handling at the time of transportation, and it is possible to prevent disintegration. Further, since the storage portion and the lid portion are air-tightly closed, the moisture absorption performance is excellent.

Further, when the linear object storage container according to the present invention is used as a storage container for a welding wire, the welding wire is stored in a coil case having a flat bottom and a cylindrical inner wall. Everything is stored. This makes it extremely easy to attach the welding wire to the wire feeding device. In the linear object storage container according to the present invention, the inside of the storage container becomes atmospheric pressure by removing the lid, and the shape of the outer cylinder and / or the inner cylinder is restored to the shape before contraction. At this time, the height (axial length) of the inner cylinder of the storage container needs to be set according to the height of the cylindrical inner wall of the coil case to which the inner cylinder fits. If is set at the same height as the inner cylinder, there is a risk that the wire drawn from the storage container may come into contact with the outer cylinder. Therefore, in the state before contraction,
It is preferable that the height of the storage container outer cylinder is lower than the height of the inner cylinder.

The storage section can be easily formed by deep drawing a sheet-like member made of, for example, resin. In addition, the storage portion formed by the deep drawing process has good airtightness. For this reason,
It is preferable that the storage section is formed by deep drawing a sheet-like member made of resin or the like.

The sheet member is preferably a resin sheet having a three-layer laminated structure of a pair of outer layers and an inner layer sandwiched between the outer layers. The outer layer uses resin with good moldability,
The inner layer is made of resin with excellent gas impermeability, so that pinholes and the like do not occur even when deep drawing is performed, and while having sufficient deformation resistance to accommodate the wire,
A resin sheet member having good gas impermeability can be obtained.

In the present invention, the inner tube and the outer tube need to be contracted in the height direction so that the wire and the container come into close contact with each other by degassing after the wire is stored in the storage portion.
By forming the sheet-shaped member into the three-layer structure as described above, it is easy to contract in the height direction while having appropriate deformation resistance.

In particular, it is preferable that the thickness of the sheet member before deep drawing is 200 to 600 μm. If the thickness of the sheet-like member is too small, the deformation resistance decreases. However, if the sheet-like member is too thick, shrinkage during degassing is not sufficient, and the sheet and the wire are difficult to adhere.

The material of the outer layer is, for example, polypropylene, and the material of the inner layer is, for example, ethylene vinyl alcohol copolymer resin (EVOH). Other examples of the resin for the outer layer include polystyrene (PS). Examples of the material for the inner layer include polyvinylidene chloride (PVDC), polyethylene terephthalate (PET), and nylon. However, when the moldability, gas impermeability, water vapor impermeability and restorability after removing the lid member were comprehensively evaluated, the outer layer portion was made of polypropylene (PP) and the inner layer portion was made of ethylene vinyl alcohol copolymer resin ( EVOH) is preferred.

[0015]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view showing a linear object storage container according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the storage unit 1 before the lid 2 is heat-sealed. The linear object storage container according to the present embodiment includes a storage unit 1 that stores a welding wire 3 wound in a coil shape, and a lid unit 2 that closes an opening side of the storage unit 1. I have. The storage section 1 includes an inner cylinder 1a fitted inside the welding wire 3 wound in a coil shape, an outer cylinder 1b fitted outside the welding wire 3, and an inner cylinder 1a. A bottom portion 1c provided between one axial end of the outer tube 1b and the bottom of the storage portion 1;
The upper cylinder 1a includes an upper bottom 1d that closes the other end, and a flange 1e that extends laterally from the other end of the outer cylinder 1b. The inner cylinder 1a and the outer cylinder 1 that constitute the storage unit 1
b, the bottom 1c, the upper bottom 1d, and the flange 1e are integrally formed by deep drawing a relatively thick resin sheet. Further, the lid 2 is formed of a resin film, and the upper bottom 1 d and the flange 1 of the storage unit 1 are formed.
e is heat sealed.

As shown in FIG. 2, before the lid 2 is heat-sealed, both the inner cylinder 1a and the outer cylinder 1b of the storage section 1 have a cylindrical shape with a smooth peripheral surface. After accommodating the coil-shaped wire 3 between the inner cylinder 1a and the outer cylinder 1b, the lid 2 is attached to the upper bottom 1d and the flange 1e of the accommodating section 1.
Heat seal. At this time, one unsealed portion is left between the flange portion 1e and the lid portion 2, the inside of the storage portion 1 is evacuated from the unsealed portion, and the inside of the storage portion 1 is depressurized. Thereby, the inner cylinder 1a and the outer cylinder 1b contract in the height direction, and the storage container and the welding wire adhere to each other. Since the wire 3 is wound in a coil shape, there is a slight gap in the axial direction. By reducing the pressure inside the storage container 1, the coiled wire 3 is also pressed vertically by the storage container, and the axial thickness of the coil decreases. In this state, the unsealed portion is heat-sealed to maintain the inside of the storage container in a reduced pressure state.

In the above embodiment, one unsealed portion is left between the flange portion 1e and the lid portion 2 and the other portion is heat-sealed and then the inside of the storage portion 1 is evacuated. Is heat-sealed. However, as shown in FIG. 5, after the wire is stored, the wire is transferred into the vacuum chamber 4 with the lid 2 placed on the storage container 1, and the entire chamber 4 is evacuated to remove the inner cylinder 1a and the outer 1b. After contracting in the height direction and bringing the wire into close contact with the storage container, the lid 2 can be heat-sealed to the flange 1e and the upper bottom 1d of the storage 1. If the flange 1e is heat-sealed, the housing 1 can be hermetically sealed, so that the heat-sealing of the upper bottom 1d may be omitted.

FIG. 6 is a longitudinal sectional view showing a second embodiment of the present invention, and FIG. 7 is a top view thereof. 6 and 7, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. In the present embodiment, the upper bottom 1
A hole 5 is provided substantially at the center of d.

The hole 5 penetrates both the upper bottom 1d and the lid 2. By providing this hole 5,
An inner flange 1g corresponding to the flange 1e is formed on the upper bottom 1d. Thus, when the hole 5 is provided, it is necessary to heat seal both the flange 1e and the inner flange 1g.

The size and shape of the hole 5 are not particularly limited, but it is necessary to leave the inner flange 1e large enough for heat sealing. Further, the shape of the hole 5 is not particularly limited, such as a triangle, a quadrangle, and a polygon, but a circular shape is preferable for manufacturing. This is because the width of the inner flange 1g can be made uniform over the entire circumference by making the hole 5 circular, and the sealing performance by heat sealing is excellent.

In this embodiment, the holes 5 can be formed by, for example, heat-sealing the lid 2 to the storage container 1 and then fusing it with a circular jig or the like.

By forming the holes 5, the collar 1g can be gripped when the wire is carried, and the handling is improved.

In each of the above embodiments, since the welding wire is fixed in close contact with the storage container, it is possible to prevent the wire from being separated due to vibration during handling, handling, and the like. Also, since the inside of the storage unit 1 is sealed,
Deterioration of wire characteristics due to moisture absorption can be prevented.
Further, since the storage portion 1 is formed of a relatively thick resin sheet, when the lid portion 2 is removed at the time of use, the inner cylinder 1a and the outer cylinder 1b are restored to their original shapes by elastic force, as shown in FIG. State. As a result, it is possible to obtain the predetermined inner wall height and outer wall height required for drawing out the wire.

The container according to the present embodiment is preferably used in combination with a welding wire feeder shown in FIG. This welding wire feeder is particularly suitable for feeding a small single coil wound wire, and the coil case 10 has a cylindrical inner wall 2 in approximately half the space of the device housing 11.
2 are installed with their central axes vertical. The coil case 10 has a bottom wall 21 and an outer wall 23 in addition to the inner wall 22. The welding wire 3 stored in the storage container is
After being removed, the entire storage container is stored in the coil case 10. A wire feeding motor 12 is arranged inside the coil case 10. A sprocket 30 is attached to a drive shaft below the motor 12, and a sprocket 31 is connected to the sprocket 30 by a belt or a chain.

In the upper part of the apparatus, a pair of feed rollers 15 are arranged with their rotation axes vertical.
In the vicinity of 5, a wire straightener 17 is arranged. A guide 16 is provided between the coil case 10, the feed roller 15, and the wire straightener 17 to guide the incoming and outgoing wires of the feed roller 15.
The welding wire unwound from the coil mounted on the coil case 10 is guided by the guide 16 and is fed to the feed roller 1.
After that, it is introduced into the wire straightener 17. Feed roller 1
5, the rotational driving force of the feed motor 12 is transmitted via a sprocket 31 and a connecting rod 32.

Further downstream of the wire straightening device 17,
A welding torch 18 is provided. Then, the power cable 19 and the gas hose 2 connected to the welding torch 18
0 is led out to the wall surface of the housing 11 via the gas solenoid valve 33 and is connected to a secondary cable.

In the wire feeder configured as described above, the coil-shaped welding wire 3 is mounted on the coil case 10 together with the storage container as described above. Next, the tip of the welding wire is pulled out from the center side of the coil, and the guide 1 is pulled out.
6, pass through the feed roller 15, and then into the wire straightener 17. Then, the tip of the welding wire is provided from the wire straightener 17 to the welding torch 18.

After the initial setting of the wire is completed, when the feed motor 12 is driven to rotate, the sprocket 3
1 and the connecting rod 32, the rotational force of which is
And the feed roller 15 starts rotating. As a result, the welding wire is unwound from the coil attached to the coil case 10 at the center thereof, and the unwound welding wire moves in the horizontal direction, and the curl is corrected by the wire straightener 17. After being turned into a straight line, it is supplied to the welding torch 18. Further, when the welding wire is unwound from the coil, the coil itself becomes a coil case 10.
Rotates together with it to make the unwinding state smooth.

As described above, in this embodiment, since the bobbin is not used, the wire feeder can be made extremely small and lightweight. In this case, as shown in FIG.
By setting the height of the outer cylinder 1b of the storage container storage unit 1 lower than the height of the coil case outer wall 23, the wire does not come into contact with the container outer cylinder when the wire is pulled out, and the wire can be pulled out smoothly.

In the above-described embodiment, the case where the present invention is applied to the housing for the welding wire has been described. However, it is needless to say that the present invention is not limited to the housing for the welding wire. It is.

[0032]

As described above, in the linear object storage container according to the present invention, after the coil-shaped linear object has been fitted into the space of the storage portion constituted by the inner cylinder, the outer cylinder and the bottom, Since the inner tube and / or the outer tube shrink in the axial direction when the inside of the storage section is depressurized by closing the lid, the welding wire is tightly fixed to the storage container, and the wire due to vibration and handling during transportation is used. Can be prevented from being disturbed, and the anti-separation performance is excellent. Further, according to the present invention, a bobbin that becomes industrial waste can be eliminated. Further, the storage portion is airtightly sealed by the lid portion, so that the moisture absorption performance is also excellent.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a linear object storage container according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a storage section before a lid section is heat-sealed.

FIG. 3 is a cross-sectional view showing an example of a welding wire feeding device.

FIG. 4 is a sectional view showing a storage container stored in a coil case.

FIG. 5 is a cross-sectional view illustrating a degassing method according to the present embodiment.

FIG. 6 is a sectional view showing a linear object storage container according to a second embodiment of the present invention.

FIG. 7 is a plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1; Storage part 1a; Inner cylinder 1b; Outer cylinder 1c; Bottom 1d; Upper bottom 1e; Flange 1g; Inner flange 2; Lid 3; Welding wire 5; Hole 10; Coil case 12; Motor 15; Feed roller 17; Wire straightener 18; Welding torch

Continuation of the front page (56) References JP-A-51-123974 (JP, A) JP-A-56-48919 (JP, A) JP-A-1-107568 (JP, U) JP-A-6-8292 (JP) , U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B65D 85/04 B65D 85/67

Claims (5)

(57) [Claims] 1. A linear object storage container for accommodating a coil-shaped linear object, wherein an inner cylinder, an outer cylinder, and a bottom located between lower ends of the inner cylinder and the outer cylinder are integrally formed, and the coil is formed. Storage part for fitting and storing a linear object between the inner cylinder and the outer cylinder, and a lid disposed at an opening between the upper end of the inner cylinder and the upper end of the outer cylinder of the storage part And the storage part has moldability.
A pair of outer layers made of resin, and a gasket sandwiched between the outer layers.
Sheet of three-layer laminate of inner layer made of non-permeable resin
The member is formed by deep drawing, and the inner cylinder and / or the outer cylinder are formed by fitting the linear object into the storage section and then reducing the pressure in the storage section. A linear object storage container which stores the linear object by contracting in the axial direction. 2. The sheet-like member has a thickness of 200 to 6
The container for a linear object according to claim 1 , wherein the container has a thickness of 00 µm. 3. A linear object storage container for accommodating a coiled linear object, wherein an inner cylinder, an outer cylinder, and a bottom portion located between lower ends of the inner cylinder and the outer cylinder are integrally formed, and Storage part for fitting and storing a linear object between the inner cylinder and the outer cylinder, and a lid disposed at an opening between the upper end of the inner cylinder and the upper end of the outer cylinder of the storage part And the storage unit,
An upper bottom portion having a hole formed between the upper ends of the inner cylinder and having the hole formed therein. After the linear object is fitted into the storage portion, the inside of the storage portion is depressurized to thereby form the inner cylinder and / or The linear object storage container, wherein the outer cylinder shrinks in the axial direction to store the linear object. 4. The linear object storage container according to claim 3 , wherein the lid has a hole at a position matching the hole in the upper bottom. 5. A linear material container according to any one of claims 1 to 4 wherein the linear material is characterized in that it is a welding wire.