JPH081282U - Bobbin winding welding material Anti-raveling plate - Google Patents

Abstract

(57) [Abstract] [Purpose] Used when pulling out the linear welding material wound on a bobbin while preventing deformation and fraying due to its spring elasticity. An annular body 2 in which a plurality of insertion holes facing the center from an outer edge surface 26 are formed by grooves 21 provided so that part of their side walls are alternately in contact with each other from the upper side and the lower side,
The strip-shaped blade 3 is fitted in the insertion hole of the annular body 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is a bobbin winding welding that is used when a wire welding material wound on a bobbin is pulled out and used while preventing deformation and fraying due to its spring elasticity at the welding site of iron materials such as construction and shipbuilding. The present invention relates to a material fray prevention plate.

[0002]

[Prior art]

 Conventionally, a veneer plate or particle board is cut into a disc with a router or press, and 4 to 12 wooden strip-shaped blades are projected radially outward from the disc for a certain length on the disc or between the two discs. In addition, it was fixed and integrated with nails, eyelets, staples of stapler, etc. and used as a fray prevention plate for bobbin winding welding material.

[0003]

[Problems to be solved by the device]

 However, in the conventional method for manufacturing the anti-raveling plate described above, the disk is cut from the rectangular plate, so that it requires a great deal of material loss and time, and there is a large variation in quality depending on the skill of the operator. In addition to affecting the manufacturing cost and production volume, the bulky shape also increases the transportation cost, and in the case of wood, it is difficult to select a material that has the desired bending elastic modulus. Moreover, damage and corrosion in a short period had to be taken into consideration.

[0004]

[Means for Solving the Problems]

 The bobbin winding-like welding material anti-raveling plate of the present invention comprises a flat plate-shaped annular body made of synthetic resin and strip-shaped blades radially fitted to the outer edge surface of the annular body. Grooves are provided at multiple locations alternately from the top and bottom surfaces so that part of the side walls are in contact with each other, and an insertion hole is formed from the outer edge surface toward the center of the torus. On the other hand, a projection is also provided on the other hand, and when the tip of the blade is fitted into the annular body, a notch that fits the projection and a cut along the longitudinal direction that receives the projection amount of the projection by elastic deformation. Since the feature is that the groove is formed, the conventional problem can be solved.

That is, FIG. 2 is a cross-sectional view for explaining a state in which an example of the bobbin winding-shaped welding material fray prevention plate of the present invention is actually used. The linear welding material 6 is inserted into the Bohin outer cylinder 5 while being wound around the Bohin inner cylinder 51. At the time of welding work, the required length of the linear welding material 61 is fed out from the upper portion of the Bohin outer cylinder 5. At that time, the linear welding material 6 having spring elasticity is pulled out and unraveled by several turns at a time. In some cases, the welding operation has to be temporarily stopped, which may bend or damage the linear welding material 6.

In order to prevent such a phenomenon, a raveling prevention plate 1 including a flat plate-shaped annular body 2 and strip-shaped blades 3 is mounted on the upper part of the Bohin inner cylinder 51, and the blades 3 Is held by a weight ring 52. Therefore, if the number of blades 3, the length and the bending elastic modulus, and the diameter and weight of the weight ring 52 are appropriately selected according to the type of the linear welding material 6, the fraying at the time of feeding the linear welding material 6 can be prevented. It can be completely prevented. Therefore, the anti-raveling plate 1 composed of the annular body 2 to which the blades 3 having the required number, material and length can be attached is particularly important.

[0007]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing the structure of a fray prevention plate 1 of the present invention. The fray prevention plate 1 is composed of a synthetic resin flat plate-shaped torus 2 and strip-shaped blades 3 radially fitted into the outer edge surface of the torus 2. In FIG. 1, only one blade 3 fitted into the annular body 2 and one blade before fitting are shown and the others are omitted. A plurality of rectangular grooves 21 having openings are provided at a plurality of positions on the surface of the flat plate-shaped annular body 2.

FIG. 3 and FIG. 4 are enlarged views of the grooves 21 and 22 provided in the annular body 2, and are views seen from the upper surface side and the lower surface side, respectively. A part of 3 is also shown. FIG. 5 is a sectional view taken along the line AA of FIG. As can be seen from FIG. 5, the groove 21 is excavated from the upper surface side of the annular body 2 in FIG. 3, and the groove 22 is excavated from the lower surface side of the annular body 2 in FIG. The grooves 21 and 22 are provided so that a part of each side wall 25 is in contact with the grooves 21 and 22 near the bottom surface thereof, and as a result, a part of the side wall 25 of the grooves 21 and 22 is broken, and the breakage occurs. Are connected to form an insertion hole from the outer edge surface 26 of the torus 2 toward the center of the torus.

Further, as shown in FIG. 4, by forming the groove 22 into a trapezoidal shape, a protrusion 23 is formed in the insertion hole, or by dividing the groove 22 into two parts, a ridge is formed between the grooves. It is also possible to form 24.

On the other hand, as shown in FIG. 3, when the blade 3 is fitted into the annular body 2, the tip portion of the blade 3 is provided with an absent portion 23 that fits with the protrusion 23. ing. Then, the tip of the blade 3 is provided with a kerf 34 along its longitudinal direction, and the tip of the blade 3 is contracted in the width direction by elastic deformation so that the protruding portion of the protrusion 23 passes. The blade 3 is configured so as not to be separated from the annular body 2 when the tip of the blade 3 is fitted into the insertion hole. When the ridge 24 is provided on the annular body 2, when the blade 3 is fitted, the open end of the cut groove 34 engages with the ridge 24, so that the blade 3 wobbles in the insertion hole. Can be prevented.

The annular body 2 and the blades 3 of the present invention are molded from a general-purpose thermoplastic synthetic resin by an injection molding method or the like. In particular, as the synthetic resin material for molding the blade 3, elastic materials such as polypropylene, polyacetal, and polycarbonate are particularly preferable, and those materials having a wide range of different flexural moduli are commercially available. Therefore, it is advantageous that a material having the required performance can be appropriately selected and used from among those materials.

When the annular body 2 of the present invention is manufactured by injection molding, the insertion holes opened in the outer edge surface 26 of the annular body 2 are alternated from the upper surface and the lower surface of the annular body 2, and the side walls of the annular body 2 are partially overlapped. Since it is formed by the grooves 21 and 22 provided so as to be in contact with each other, it is possible only by providing protrusions at predetermined positions of the upper and lower molding dies, and the side core die for forming the insertion hole and the angular pin for moving the same. Since the molding die is simple and small, the manufacturing cost can be greatly reduced, and the protrusion 23 and the ridge 24 can be provided in the insertion hole with a slight modification of the molding die. .

In the above-mentioned embodiment, the insertion holes are formed in the annular body 2 at eight positions, but they may be provided at 3 to 16 positions as required. The flat annular body 2 has a thickness of about 5 to 20 mm, the blades 3 have a thickness of 2 to 7 mm, a width of 20 to 50 mm, and a length of about 100 to 500 mm.

Further, in the above embodiment, the grooves 21 and 22 provided in the annular body 2 are perpendicular to the diameter direction of the annular body 3 and are in contact with each other, but as shown in FIGS. 6 and 7. The grooves 71 and 72 may be parallel to the radial direction of the torus 3 and contact each other.

[0015]

[Effect of device]

 Since the bobbin winding-type weld material anti-raveling plate of the present invention is constructed as described above, the blade insertion hole can be formed by simply providing protrusions at predetermined positions of the upper and lower molds when manufacturing the annular body. Since the side core type and the angular pin for moving the side type are not required, the forming die is simple and small, and the manufacturing cost can be greatly reduced.In addition, a protrusion or a ridge is provided in the insertion hole. This is also possible with a slight modification of the mold. Moreover, since the number of blades, the length, and the bending elastic modulus can be appropriately selected according to the type of the linear welding material, it is possible to completely prevent the fraying of the linear welding material at the time of feeding. Furthermore, the anti-ravel plate can be assembled with one touch, it is easy, there is no variation in quality depending on the skill level of the operator, there are no unnecessary parts to discard at the time of manufacture, and transportation costs can be reduced and durability is improved. Since it is available, it can be used for a long time.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a bobbin winding-shaped welding material fray prevention plate of the present invention, in which the blades are fitted in an annular body 1
Only one sheet and one before insertion are shown and the others are omitted.

FIG. 2 is an explanatory view showing a state in which the bobbin winding-shaped welding material fray prevention plate of the present invention is used.

FIG. 3 is an enlarged view showing a groove portion and a part of a blade provided on the upper surface of the annular body as an example of the present invention.

FIG. 4 is an enlarged view of the groove portion of the annular body of FIG. 3 viewed from the lower surface side.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is an enlarged view of a groove portion provided in an annular body of another embodiment as seen from the upper surface side thereof.

7 is an enlarged view of the groove portion of the annular body of FIG. 6 viewed from the lower surface side.

[Explanation of symbols]

 1 Bobbin Winding Welding Material Fray Prevention Plate 2 Torus 3 Blade 21 Groove 22 Groove 23 Groove 23 Protrusion 26 Outer Edge Surface 33 Absent Part 34 Cut Groove

Claims (1)

[Scope of utility model registration request] 1. A flat plate annular member made of synthetic resin and strip-shaped blades radially inserted into the outer peripheral surface of the annular member, wherein the upper and lower surfaces of the annular member alternate from top to bottom. On the other hand, by the groove provided so that a part of the side walls are in contact with each other, an insertion hole facing from the outer edge surface toward the center of the torus is formed, and a projection is also provided in the insertion hole, On the other hand, at the tip of the blade, when it is fitted into the annular body, there are formed a notch portion that fits into the protrusion and a kerf along the longitudinal direction that receives the protrusion amount of the protrusion by elastic deformation. A bobbin winding-like welding material fray prevention plate.