JP4804850B2 - Level-wound coil pipe supply method - Google Patents

Description

  In the present invention, heat transfer pipes (such as inner surface grooved pipes and smooth pipes) of air conditioner refrigerators such as air conditioners, copper or copper alloy pipes used for building hot water supply / water supply pipes, etc. are arranged in a coil in a multilayered manner. The present invention also relates to a tube supply method for a level-wound coil in which the multilayer coil is unwound by arranging its axial direction in the vertical direction.

  As shown in FIG. 4 (a), the level wound coil is formed by aligning and winding the tube 3 around the bobbin 7 in multiple layers, and then removing the side plate 7a and the inner cylinder 7b constituting the bobbin 7 as shown in FIG. 4 (b). The coil 1 is annealed (tempered), stored and transported with its axial direction 2 oriented in the vertical direction, and is further wound as shown in FIG. Unwinding (uncoiling) is performed (Patent Document 1). In FIG. 4 (a), 8 is a turntable, 6 in FIG. 4 (c) is a plate material (such as donut paper that serves as a cushioning material) that partitions a plurality of level wound coils 1 stacked, 4 is a guide for changing course, 9 is It is a pallet.

  The level-wound coil is arranged with the winding start end (tube end) of the tube located in the innermost layer of the coil facing upward, the tube end is pulled up, and passed through a curved cylindrical guide 4 disposed above the coil. Change the course and supply it to the user. The tube 3 drawn out from the coil 1 forms a loop (curl) spirally, but this curl is pulled upward and further disappears while passing through the guide 4.

  As shown in FIG. 5, the level wound coil 1 is formed by winding the tubes 3 in a coil shape to form a first layer coil (innermost layer coil) 1b, and a second layer coil on the first layer coil 1b. Are inserted into the recesses between the tubes on the outer surface of the first layer coil, aligned and wound, and thereafter the third layer coil on the second layer coil and the fourth layer coil on the third layer coil (outermost layer coil) ) 1a is arranged and wound.

Japanese Patent Laid-Open No. 2004-2012

  In the conventional method of supplying the level-wound coil 1 (see FIG. 4C), when the tube 3 is unwound, the tube 3 is difficult to be separated from the coil 1, and the tubes 3 rub against each other to cause scratches or breakage. There was a thing. In addition, the curl is difficult to disappear in the vicinity of the location where the coil 1 is badly separated, and the guide 4 may be rubbed and scratched. A method for improving this problem by specifying a winding method of the tube 3 has been proposed (Patent Document 1), but a sufficient effect has not been obtained.

  In view of the above, the present inventors have studied a method of supplying the tube without damaging the tube from the level wound coil. As a result, it has been found that the way in which the tube is unwound is influenced by the vertical position of the guide disposed above the level wound coil, and further studies have been made to complete the present invention.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a method for supplying a level-wound coil tube in which the tube is not easily damaged.

According to the first aspect of the present invention, a plurality of level wound coils, in which tubes are wound in a multilayered manner in a coil shape, are arranged in a stack with their axial directions oriented in the vertical direction, the tubes are unwound from the outer layer of the coils, and the winding in the uncoiled tubing tube supply method level-wound coil is supplied through the guide which is disposed above the coil, the guide, in above said coil, arranged in plan view inside of the coil, before Kiko yl the vertical direction of the vertical distance between the upper surface and the guide entrance, outward force acts on the pipe unwinding, setting a predetermined range of the first predetermined distance to the second predetermined distance, said the previous SL coil between the guide, the preliminary guide disposed, the vertical distance is increased as the unwinding to lower from the upper of said plurality stacked said coil, not satisfy the predetermined range situ In, the preliminary guide, which is the vertical distance tube supply method of level-wound coils placed so as to satisfy the predetermined range between the upper surface of the front Kiko yl.

  In the present invention, since the range of the vertical distance between the upper surface of the level wound coil and the guide inlet is properly defined, the tube can be easily separated from the level wound coil and unwound well. Thus, the tube will not be damaged (scratched, broken, deformed, etc.) when unwound from the coil or when passing through the guide.

  In the present invention, when a pipe end is pulled out from a level wound coil arranged with its axis oriented vertically, and the pipe end is fed through a guide arranged above the coil, the upper surface of the level wound coil is When the vertical distance from the guide inlet is short, an outward force is applied to the tube, and when it is long, the force is applied to the center, and further studies are made based on this knowledge. It has been made.

Hereinafter, the present invention will be specifically described with reference to the drawings.
FIG. 1 is a perspective explanatory view showing a first embodiment of the pipe supply method of the present invention.
In this pipe supply method, when the level-wound coil 1 is arranged with its axial direction 2 oriented in the vertical direction and the pipe end of the outermost layer coil 1a is pulled out and unwound, the guide upper surface of the level-wound coil (upper coil) 1 Since the vertical distance A between 1c and the inlet 4a of the guide 4 is short, an outward force acts on the unrolled tube 3, and the tube 3 is easily separated from the coil. Therefore, when unwinding, the pipe 3 is not scratched or bent. In addition, the curl is easily generated and disappears, and the guide 4 is not rubbed and scratched.

  In the present invention, the reason why the vertical distance A between the upper surface of the level wound coil and the guide inlet 4a is defined to be 950 mm or less is that the tube 3 is easily separated from the coil when the distance A exceeds 950 mm. This is because sufficient cannot be obtained. The distance A is preferably 600 mm or less, and more preferably 500 mm or less.

  If the distance A is too short, the tube is difficult to come out, so the distance A is preferably 50 mm or more. Preferably it is 100 mm or more, More preferably, it is 200 mm or more.

  In the first aspect of the present invention, the level-wound coil may have its outermost tube end positioned on the lower side or positioned on the upper side. The number of turns in the outermost layer is arbitrary as long as it does not exceed the number of turns per layer. The number of layers may be odd or even.

FIG. 2 is a perspective explanatory view showing a second embodiment of the pipe supply method of the present invention.
This tube supply method is a method in which the level wound coil 1 is arranged with its axial direction 2 oriented in the vertical direction, and the tube end of the innermost layer coil 1b (see FIG. 5) is pulled out and unwound. Since the vertical distance B between the coil upper surface 1 c of the coil (upper coil) 1 and the inlet 4 a of the guide 4 is long, an inward force acts on the unwinded tube 3, and the tube 3 is removed from the coil 1. The pipe 3 is easily separated, and the pipe 3 is not scratched or bent when unrolling. In addition, the curl is easily generated and disappears, and the guide 4 is not rubbed and scratched.

The reason for defining the distance B to be 700 mm or more is that if the distance B is less than 700 mm, the inward force does not sufficiently act on the unrolled tube 3, so that the coil of the tube 3 is poorly separated, and the tube 3 is scratched or damaged. This is because bending occurs. Further, the curl is not easily lost, and the guide 4 may be rubbed and scratched. The distance B is preferably 850 mm or more, more preferably 900 mm or more.
The longer the distance B is, the more the tube can be prevented from being bent or scratched. The distance B is preferably 3000 mm or less, and more preferably 2000 mm or less.

  In the present invention, the unwinding method from the outermost layer is advantageous in the following two points as compared with the unwinding method from the innermost layer. (1) The height of the facility can be lowered. (2) The number of windings of the outermost layer is arbitrary, and yield reduction due to extra scale does not occur. That is, in the method of unwinding from the innermost layer, when the outermost layer (n layer) is not in contact with the plate material 6, the outermost layer collapses when the n-1 layer is unwound from below, so that the outermost layer is fully wound. It is necessary to keep it, and extra scale occurs.

  In the present invention, the shape of the guide is not limited to a tubular shape, and the same effect can be obtained even in a roll shape.

  When a plurality of level wound coils are stacked in three or four stages and unwound from each outer layer, the distance A becomes longer as the unwinding is performed from the upper stage to the lower stage, and the specified value of the present invention may not be satisfied. In this case, it is necessary to move the guide or the coil in the vertical direction to bring them close to each other, and this work is troublesome.

  That is, as shown in FIG. 3, this pipe supply method is a method in which a preliminary guide 5 is provided below the guide 4 and the pipe 3 is passed through the guide 4 after passing through the preliminary guide 5. In this method, the distance A is a vertical distance between the coil upper surface 1c and the preliminary guide inlet 5a. According to this method, it is not necessary to move the guide 4 or the coil 1 up and down, and the distance A can be easily shortened.

  The preliminary guide may have any shape such as a ring shape, a cylindrical shape, a polygonal shape, a conical shape, or a polygonal pyramid shape. The shape of the entrance of the preliminary guide 5 is preferably the same as the shape of the entrance of the guide 4.

  A plurality of spare guides may be provided at predetermined intervals, but if the spare guides are movable in the vertical direction, one spare guide is sufficient.

Level-wound coils 1 in which copper tubes (hereinafter simply referred to as “tubes”) 3 are arranged and wound in a coil are stacked in three stages, and the tube end of the outermost coil 1a of the upper coil is drawn upward and supplied to the user through the guide 4. (See FIG. 2 ), the degree of separation of the copper tube from the coil and the quality of the copper tube after passing through the guide were investigated. The vertical distance A between the upper surface 1c of the upper coil and the cylindrical guide inlet 4a is 630 mm, and the dimensions of the upper, middle, and lower coils are 310 mm in height, 300 mm in inner diameter, and 560 mm in outer diameter. The thickness of 6 was 10 mm. The distance A between the upper surface of the upper coil and the guide inlet 4a was 630 mm.

  Subsequent to Example 1, the tube end of the outermost layer coil 1a of the middle stage coil was drawn upward and supplied to the user through the guide 4, and the same investigation as in Example 1 was performed. The distance A between the upper surface of the middle coil and the guide inlet 4a was 950 mm.

  Continuing from the second embodiment, the tube end of the outermost coil 1a of the lower coil is pulled upward, and this is passed through the ring-shaped preliminary guide 5 and the guide 4 in this order and supplied to the user (see FIG. 4). The same survey was conducted. The vertical distance A between the upper surface of the lower coil and the preliminary guide inlet 5a was 310 mm. The inner diameter of the preliminary guide inlet 5a was the same as the inner diameter of the guide inlet.

[Comparative Example 1]
The tube 3 was supplied to the user in the same manner as in Example 3 except that the tube end of the outermost coil 1a of the lower coil was drawn upward and passed directly through the guide 4, and the same investigation as in Example 1 was performed. . The distance A between the upper surface of the lower coil and the guide inlet 4a was 960 mm.

  Three level wound coils, in which tubes are wound in a coil, are stacked, the pipe end of the innermost layer coil 1b of the upper coil is drawn upward, and supplied to the user through the guide 4 (see FIG. 1). Then, the middle coil and the lower coil were supplied in this order, and the same investigation as in Example 1 was performed. The vertical distance B between the upper surface 1c of the upper coil and the guide inlet 4a was 700 mm, the middle coil distance B was 1020 mm, and the lower coil distance B was 1340 mm.

[Comparative Example 2]
Three level wound coils in which tubes are aligned and wound in a coil shape are stacked, and the tube end of the innermost layer coil 1b (see FIG. 5) of the upper coil is drawn upward and supplied to the user through the guide 4 (see FIG. 3). The same investigation as in Example 4 was performed. Here, the vertical distance B between the upper surface 1c of the upper coil and the guide inlet 4a is 690 mm.

  The results of Examples 1 to 4 and Comparative Examples 1 and 2 are shown in Table 1.

As is clear from Table 1, all of the inventive products (Nos. 1 to 6) are very good or good in the degree of separation of the copper tube from the coil, the curl easily disappears, and after passing through the guide The copper tube was not damaged at all, and even if there was no problem in practical use, the quality was extremely good or good.
In contrast, the comparative product No. No. 7 is because the distance A is too long. In No. 8, since the distance B was too short, the copper tubes were hardly separated from the coil, and when pulling out the copper tubes, the copper tubes were rubbed against each other, resulting in large scratches. Further, since the copper tube was difficult to separate from the coil, a part where the curl was difficult to disappear was generated, and the part was rubbed with the guide, and a large scratch was generated.

It is a perspective explanatory view showing a 1st embodiment of a pipe supply method of the present invention. It is a perspective explanatory view showing a 2nd embodiment of the pipe supply method of the present invention. It is a perspective explanatory view showing a 3rd embodiment of the pipe supply method of the present invention. (A)-(c) is a perspective explanatory view of a level-wound coil. It is a longitudinal cross-section part explanatory drawing of a level wound coil.

1 Level Wound Coil 1a Outermost Layer of Level Wound Coil 1b Innermost Layer of Level Wound Coil 1c Top Surface of Level Wound Coil 2 Level Wound Coil Axial 3 Donut paper)
7 Bobbin 7a Side plate constituting the bobbin 7b Inner cylinder constituting the bobbin 8 Turntable 9 Pallet

Claims (1)

A plurality of level wound coils, in which tubes are wound in a multilayered manner in a coil shape, are arranged in a stack with their axial directions oriented vertically, the tubes are unwound from the outer layer of the coils, and the unwound tubes are wound into the coils In a method for supplying a level wound coil to be supplied through a guide disposed above,
The guide is disposed above the coil and inside the planar view of the coil,
The vertical direction of the vertical distance between the upper surface and the guide inlet of the pre-Kiko yl, outward force acts on the pipe unwinding, setting a predetermined range of the first predetermined distance to the second predetermined distance,
Between the front Symbol coil and the guide is provided with a pre-guide,
When the vertical distance becomes longer as the coils are unrolled from the upper stage to the lower stage, and the predetermined range is not satisfied,
The preliminary guide,
Placement level-wound coils methods tube supply that as the vertical distance satisfies the predetermined range between the upper surface of the front Kiko yl.

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