Coil loading holding body for flat-wound coil, Coil bale for flat-wound coil, and Pallet for flat-wound coil loading holding body

Abstract

Provided is a loading holding body capable of smoothly and trouble-free implementation of unwinding a pipe body from a flat wound coil (LWC). In a buffer plate 26 on which an LWC 24 is placed, a plate-shaped buffer plate 26 including a plurality of hollow portions 38 formed parallel to each other by an upper side plate 32, a lower side plate 34, and a plurality of ribs 36 is configured, and on a surface of the upper side plate 32 on which the LWC 24 is placed, a plurality of recessed grooves 30 recessed and extending parallel to each other at a prescribed distance are formed to a prescribed depth, and the LWC 24 is configured to be placed on the buffer plate 26 in a manner that the plurality of recessed grooves 30 respectively cross lower end portions of the LWC 24 in a circular ring shape, so that a prescribed gap is respectively formed between the LWC 24 and the buffer plate 26 at the plurality of recessed groove 30 portions.

Description

Technical Field

[0001] This invention relates to a loading and holding body for level wound coils, a bundling body for level wound coils, and a bottom board for loading and holding bodies of level wound coils. In particular, it relates to an improved structure of a loading and holding body for level wound coils used in heat transfer tubes for air conditioners and the like, which is made of metal tubes such as copper or copper alloy tubes or aluminum or aluminum alloy tubes and is supported by a bottom board; a bundling body for level wound coils formed by bundling several such loading and holding bodies; and a new structure of a bottom board for the loading and holding body of the level wound coil. Background Technology

[0002] For a long time, metal tubes such as smooth tubes and grooved tubes on the inner surface have been used as heat transfer tubes in air conditioning equipment such as air conditioners, as well as for hot water supply and water supply piping in buildings. These metal tubes, such as copper or copper alloy tubes (hereinafter collectively referred to as copper tubes) and aluminum or its alloy tubes (hereinafter collectively referred to as aluminum tubes), are generally wound into coils called flat wound coils (LWC) during their manufacturing process. After being annealed and subjected to specified heat treatment, they are bundled and shipped to air conditioning manufacturers, where they are further unbundled and unwound from the LWC to be used for various purposes.

[0003] Here, the LWC is, for example, as follows: Figure 1 As shown (it should be noted that, for the sake of simplicity, the cross-section of the tube is shown as a circle here. The same applies below.), tubes such as copper tubes are arranged and wound around a bobbin 12, and are stacked in multiple layers (columns) to form a bobbin. More specifically, the bobbin 12, which consists of a detachable inner cylinder 14 and a side plate 16, is mounted on a predetermined rotating device with its axial direction either horizontal or vertical, and is driven to rotate. On the other hand, on the outer circumferential surface of the inner cylinder 14 of the bobbin 12, the position of one end of the bobbin in the axial direction (in...) Figure 1 Starting from the left end (located in the middle), the coil is wound towards the opposite end (to the right in this case) to form a first layer of coils in a cylindrical shape. Then, as shown in the figure, the tube 10 reaches the right end and the first layer of coils is finished, the second layer of coils is wound from the right end to the left end. At this time, the tubes 10 of the second layer are in contact with each other and tightly wound on the first layer of coils in such a way that they are embedded in the recesses between adjacent tubes 10, 10 formed in the first layer of coils to form the second layer of coils. Then, the tubes 10 are wound in the opposite direction to form the third layer of coils. The same winding is performed below, and the LWC18 is formed by the so-called traverse winding method of forming multiple layers of coils by stacking.

[0004] On the other hand, as a method of unwinding (taking out) the pipe body 10 from the LWC 18 as described above, in recent years, a method of unwinding the coil called the ETS (eye to the sky) method has been proposed and has attracted attention. The ETS method is a method of gradually unwinding by unwinding the pipe body 10 from the inner peripheral side of the LWC 18 after supporting the LWC 18 with a pad after detaching the winding drum 12 from the LWC 18, but in this ETS method, for example, in the case of unwinding the LWC 18 obtained in Figure 1 the first coil layer to the second coil layer, the lowermost pipe body becomes a state of being sandwiched between the pad supporting it and the pipe body located directly above it. Then, by the pushing action from the pipe body directly above based on the weight of the coil layer including these pipe bodies, the sliding resistance of the lowermost pipe body with respect to the pad increases, and the pipe body itself is composed of a soft and thin-walled copper pipe or the like, so there is a problem that kinking (bending) or the like of the pipe body can occur.

[0005] Therefore, in Japanese Patent Application Publication No. 2002-370869 (Patent Document 1) and the like, a scheme in which, instead of using the LWC 18 as shown in Figure 1 , the number of windings n of the coils (pipe bodies 10) in each layer (each row) is set to the same number, but using, for example, the LWC 22 in which the number of windings of the coils (10) in the odd-numbered layers is set to n and the number of windings of the coils (10) in the even-numbered layers is set to (n-1) and wound as shown in Figure 2 , is proposed. Figure 3 , in a state in which the right side of the LWC 22 is disposed on the lower side, the pipe bodies 10 are unwound in the direction shown by the arrow. Then, when using these LWC 22, for example, as shown in Figure 3 , when the coils of the first layer are unwound and the coils of the second layer are unwound, the lowermost pipe bodies 10b (coils) of these second or third layers exist in a space of about 1 / 2 the size of the pipe diameter between the pad 20 on the lower side thereof, so they are not subjected to the pushing action from the coils (pipe bodies 10c) located above, and thus can be unwound without resistance, so it is also possible to eliminate the occurrence of kinking and the like.

[0006] However, even in the LWC 22 as shown in Figure 2 , there is a problem as follows. That is, as shown in Figure 4As shown, in LWC22, when the tube 10 is wound from the inner coil layer on the side of the inner tube (14) of the winding drum to the adjacent outer coil layer, in order to pass through the tube portion 11a at the winding end of the inner coil layer and the tube portion 11b at the insertion start of the recess between the tubes 10, 10, and the inner coil layer tube portion 11c that contacts the side plate 16, the tube portion 11d that is arranged in the direction perpendicular to the coil axis with the tube portion 11c is positioned to contact the side plate 16. It should be noted that, it should be understood that, in Figure 4 In order to make it easier to understand the configuration of the portion 11d that extends beyond the tube body, a part of the outer coil layer is omitted. In addition, the configuration position of the portion 11d that extends beyond the tube body in each layer of the tube body 10 is different from the actual position and is depicted as being in the same position in the circumferential direction.

[0007] Therefore, from the example shown Figure 4 longitudinal section Figure 5 It is known that in all coil layers from the second layer onwards from the inside of the LWC22, the portion 11d that extends beyond the tube must exist at a circumferential position within one circumference of the tube 10. However, when the LWC22 is supported by the support plate 20 (which acts as a pad) with the spool 12 removed, space is sometimes not formed between the portion 11d extending beyond the tube and the support plate 20. Therefore, when unwinding the LWC22 using the ETS method, when the portion 11d extending beyond the tube is wound from the bottommost coil layer of the tube 10, it is sandwiched between the support plate 20 supporting it and the tube 10 located directly above the portion 11d. Due to the pushing action from the tube 10 directly above, the sliding resistance relative to the support plate 20 sometimes increases. Therefore, even in the LWC22, which is wound in such a way that there is a space between the tube 10 at the bottom and the support plate 20, there is still a concern that the tube 10 (beyond the tube portion 11d) may twist (bend).

[0008] In this situation, in Japanese Patent Application Publication No. 2006-290619 (Patent Literature 2), a flat-wound coil loading holding body (referred to as a flat-wound coil tray loading body in the publication) is disclosed, in which, in order to prevent damage and the like caused by contact of the flat-wound coil with a support plate (tray), a recess is provided on a flat-wound coil side of a cushion sheet interposed between the flat-wound coil and the support plate, and the over pipe portion is positioned with respect to the recess. Also, it is pointed out that, if a cushion sheet having this configuration is used, since a space resulting from the recess is formed directly below the over pipe portion (11d), resistance resulting from a pushing action from the pipe body (10) located directly above the over pipe portion (11d) is reduced at the time of winding out of the over pipe portion (11d), and thus, occurrence of a failure such as kinking can be prevented.

[0009] In this way, in the case where the cushion sheet provided with the recess as described above is interposed between the flat-wound coil and the support plate to form the flat-wound coil loading holding body, since the weight of the flat-wound coil is extremely large, the pipe body of the flat-wound coil is deflected at a portion corresponding to the recess of the cushion sheet due to the dead weight, and thus, there is a concern that partial deformation such as bending occurs at the pipe body before winding out of the flat-wound coil.

[0010] Therefore, in Japanese Patent Application Publication No. 2010-1072 (Patent Literature 3), a LWC loading holding body is proposed, in which the cushion sheet interposed between the LWC and the support plate has a low-friction portion in which the sliding resistance between the pipe body of the LWC and the cushion sheet is small, and the low-friction portion is configured by a base sheet disposed on the support plate and a plurality of flexible protrusions composed of hook-shaped tip portions that contact the pipe body at a contact portion and are protruded at intervals from the base sheet, and thus, winding out of the pipe body of the LWC can be performed without failure and smoothly.

[0011] However, since the low-friction portion in the cushion sheet used in this loading holding body is configured by planting a plurality of hook-shaped protrusions in the base sheet, it takes labor and time to manufacture, and there is a problem in that the manufacturing cost is high, and there are problems in maintenance such as the fact that the operation of removing dust and the like that has entered between the plurality of protrusions is troublesome.

[0012] Related Art

[0013] Patent Literature

[0014] Patent Literature 1: Japanese Patent Application Publication No. 2002-370869

[0015] Patent Literature 2: Japanese Patent Application Publication No. 2006-290619

[0016] Patent Literature 3: Japanese Patent Application Publication No. 2010-1072 SUMMARY

[0017] PROBLEMS TO BE SOLVED BY THE INVENTION

[0018] Here, the present application is made in the background of the above fact, and the problem to be solved is to effectively prevent a failure such as kinking when a pipe body is wound out from the LWC in an inexpensive configuration in an LWC loading holding body in which the LWC is placed on a pallet, and in addition, the problem to be solved is also to provide an LWC bale composed of several such LWC loading holding bodies, and a pallet composed of a new configuration of a buffer plate used in the LWC loading holding body.

[0019] MEANS FOR SOLVING THE PROBLEMS

[0020] Furthermore, in the present application, in order to solve the above problems or problems understood from the entire description and drawings, the following various modes can be preferably implemented, but it is needless to say that any combination of the following various modes can be adopted. Note that the embodiments and technical features of the present application are not limited to the following description, and it should be understood that the modes can be conceived from the technical idea disclosed in the entire description and drawings.

[0021] Therefore, the present application is first to solve the above problems, and the gist is that the LWC loading holding body is such that the LWC is placed on a flat pallet with the coil axis direction vertical, the LWC has a configuration in which a plurality of coil layers are stacked with the pipe body of one adjacent coil layer inserted into the recess between the pipe bodies of the other coil layer, the coil layer is formed by arranging and winding a metal pipe body, wherein the pallet is composed of a plate-shaped buffer plate, the plate-shaped buffer plate has a plate-shaped upper side plate on which the LWC is placed, a plate-shaped lower side plate located at a position opposite to the upper side plate spaced apart by a predetermined distance downward, and a plurality of ribs connecting the upper side plate and the lower side plate and extending parallel to each other, the space between the upper side plate and the lower side plate is divided by the plurality of ribs, a plurality of hollow portions extending in the extension arrangement direction of the plurality of ribs are formed parallel to each other, a plurality of recessed grooves recessed and extending parallel to each other at a predetermined distance are formed on the surface of the upper side plate on which the LWC is placed, and the LWC is placed on the buffer plate in such a manner that the plurality of recessed grooves cross the circular ring-shaped lower end portion of the LWC, respectively, and a predetermined gap is formed between the LWC and the buffer plate at the plurality of recessed groove portions.

[0022] Note that according to one preferred aspect of the LWC loading holding body of the present application, the plurality of recessed grooves are formed on the surface of the upper side plate in parallel with respect to the extension arrangement direction of the ribs.

[0023] Further, in the LWC loading holding body according to the present application, it is advantageous that the plurality of grooves are respectively formed in the joint sites of the ribs to the upper side plate.

[0024] Further, in another preferred aspect of the LWC loading holding body according to the present application, the middle portion of the rib in the height direction thereof has at least one bent portion, and further, the buffer plate is composed of a plastic material.

[0025] Further, in another preferred aspect according to the present application, the pad plate has a slip stop portion on the lower surface thereof, and the upper portion of the LWC disposed below the pad plate abuts against the slip stop portion. Further, such a slip stop portion is advantageously formed by attaching a slip stop sheet.

[0026] Further, in the present application, it is also an object to provide an LWC bale in which one or a plurality of the LWC loading holding bodies as described above are stacked, and at least the LWC is baled.

[0027] Further, in the present application, it is also an object to provide an LWC loading holding body pad which is a pad plate for constituting an LWC loading holding body in which an LWC is placed with the coil axis direction thereof being vertical, the LWC having a configuration in which a plurality of coil layers are stacked with the pipe body of the coil layer on one side being fitted into the recess portion between the pipe bodies of the coil layers on the other side, the coil layers being formed by arranging and winding a metal pipe body, wherein the pad plate is composed of a plate-shaped buffer plate having a plate-shaped upper side plate on which the LWC is placed, a plate-shaped lower side plate which is located at a position opposite to the upper side plate spaced apart by a predetermined distance downward from the upper side plate, and a plurality of ribs which link the upper side plate and the lower side plate and extend parallel to each other, the space between the upper side plate and the lower side plate being partitioned by the plurality of ribs, a plurality of hollow portions extending parallel to each other are formed in the extending direction of the plurality of ribs, in the surface of the upper side plate on which the LWC is placed, a plurality of grooves recessed and extending parallel to each other at a predetermined distance are formed, and the LWC is placed on the buffer plate in such a manner that the plurality of grooves parallel to each other respectively cross the circular ring-shaped lower end portion of the LWC, and a predetermined gap is respectively formed between the LWC and the buffer plate at the plurality of groove sites.

[0028] Note that the buffer plate in the LWC loading holding body pad as described above is preferably composed of an extrusion molded product of a plastic material.

[0029] Effects of the Invention

[0030] Thus, in the LWC loading holding body according to the present application, by providing the upper side plate and the lower side plate which place and support the pad plate of the LWC to be connected by a plurality of ribs which are parallel to each other, and by providing a plurality of hollow portions which are parallel to each other among the plurality of ribs, the portion of the upper side plate which is located on the plurality of hollow portions is easily bent due to the weight of the LWC compared to the portion of the plurality of ribs, and a plurality of grooves are provided parallel to each other on the surface of the upper side plate which places the LWC, and a predetermined gap is formed between the tube located at the lower end portion of the LWC and the tube at each of the plurality of groove portions, so that when the tube is unwound from the LWC in the ETS method, for example, the tube which is located at the lowermost portion of the predetermined coil layer and which contacts the surface of the buffer plate which constitutes the pad plate can easily slide and can be taken out with a small sliding resistance, and thus, the tube which contacts the surface of the upper side plate can advantageously avoid or reduce the occurrence of a twist or the like in the tube due to a large sliding resistance between the tube and the upper side plate even if the tube is pushed from above.

[0031] Further, the buffer plate which is used as the pad plate or as a part thereof in the LWC loading holding body according to the present application is constituted by the upper side plate, the lower side plate, and the plurality of ribs which connect them, and has a simple structure in which a plurality of grooves are formed on the surface of the upper side plate, and can be easily manufactured by extrusion molding of plastic or the like, and thus has the feature that the manufacturing cost thereof can be advantageously reduced.

[0032] Therefore, in the LWC loading holding body according to the present application as described above, regardless of the winding posture of the coil of the LWC, not only can the occurrence of a twist or the like when the tube is unwound from the LWC be effectively prevented, but also the partial deformation of the tube due to the bending of the tube in the state before the tube is unwound can be advantageously eliminated. As a result, all of the tubes can be unwound from the LWC with good quality, and the yield of the tubes can be extremely effectively improved.

[0033] Further, by using the pad plate for the LWC loading holding body according to the present application, the above-described excellent effects can be extremely advantageously enjoyed.

[0034] In addition, in the LWC bundle according to the present application, the same effects as the excellent effects which can be achieved in the LWC loading holding body described above can be extremely advantageously enjoyed. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a cross-sectional explanatory view which shows one winding method of the LWC by the arrangement and winding of the tubes.

[0036] Figure 2is a partial cross-sectional explanatory view showing another different winding manner of LWC formed by arranging and winding pipe bodies.

[0037] Figure 3 is a partial cross-sectional explanatory view showing a state when the LWC is unwound and the pipe is taken out.

[0038] Figure 4 is an explanatory view showing a part of the side surface of the general LWC.

[0039] Figure 5 is Figure 4 is an A-A cross-sectional explanatory view of

[0040] Figure 6 is a perspective explanatory view showing an example of the load holding body of the LWC having the configuration according to the present application.

[0041] Figure 7 is Figure 6 is a longitudinal cross-sectional explanatory view of the LWC shown in

[0042] Figure 8 is a plan view of the buffer plate used in the load holding body of the LWC shown in Figure 6

[0043] Figure 9 is a partial explanatory view of the B-B cross section in Figure 8

[0044] Figure 10 is an explanatory view showing a state in which the pipe bodies are placed at different positions in the cross-sectional configuration shown in Figure 9 (a) shows a state in which the pipe bodies are placed at the upper side plate portion between the ribs in the buffer plate, and (b) shows a state in which the pipe bodies are placed at the upper side plate portion provided with the ribs.

[0045] Figure 11 is a cross-sectional explanatory view further enlarging and showing the connecting portion of the upper side plate and the lower side plate with the ribs.

[0046] Figure 12 is a cross-sectional explanatory view showing an example of the bale (three-layer stacked state) of the LWC according to the present application.

[0047] Figure 13 is an explanatory view showing the provided configuration of the slip preventing portion formed on the lower surface of the buffer plate used in the load holding body of the LWC having the configuration according to the present application, (a) and (b) show different examples thereof, respectively.

[0048] Figure 14 ​​is an example of the arrangement of the slip preventing portion formed on the upper surface of the cushioning plate used for the LWC loading holder having the configuration according to the present application, and Figure 8 a corresponding plan view. DETAILED DESCRIPTION

[0049] Hereinafter, for a more specific explanation of the present application, an embodiment of the present application will be explained in detail with reference to the drawings.

[0050] First, in Figure 6 , an embodiment of the LWC loading holder having the configuration according to the present application is shown in its perspective view, and in Figure 7 , it is shown schematically in its longitudinal sectional view. Also, from these drawings, it is known that the LWC (flat wound coil) loading holder of the present embodiment is configured of the LWC 24 and the cushioning plate 26 as a backing plate on which the LWC 24 is placed.

[0051] More specifically, the LWC 24 has a known configuration of being unwound from the inside, which is formed by laminating a plurality of coil layers in a manner that the tube body 10 of the coil layer on one side is inserted into the recess between the tube bodies 10, 10 of the coil layer on the other side, the coil layers being formed by arranging and winding the tube bodies 10 of copper tubes or aluminum tubes or the like. That is, this LWC 24 is formed, for example, by winding the tube bodies 10 on the winding drum 12 in the usual arrangement winding manner based on traverse winding as shown in Figure 1 , and then detaching the winding drum 12.

[0052] Then, the obtained LWC 24 is placed on and supported by the cushioning plate 26 at the coil axial end surface on the opposite side of the winding start end 10a of the tube body 10 in a state that the coil axial direction is set as the up-down direction and the winding start end 10a of the tube body 10 is located at the upper portion.

[0053] Note that, here, the LWC 24 constituting this LWC loading holder is set in the same winding posture as the LWC 22 shown in Figure 2 . Thus, in a state that the LWC 24 is supported on the cushioning plate 26, a space of a size of about 1 / 2 of the outer diameter of the tube body 10 is formed between the tube body 10 of the coil layer on the lowermost portion of the even-numbered coil layers counted from the inside of the LWC 24 and the cushioning plate 26. Also, between the tube body portion 11a of the winding end of the coil layer of the odd-numbered coil layers counted from the inside of the LWC 24 and the tube body portion 11b which is a part of the tube body 10 of the coil layer located on the outside of the coil layer adjacent to this coil layer and which is the insertion start end of the recess between the tube bodies 10, 10 of the odd-numbered coil layers, a space of a size of about 1 / 2 of the outer diameter of the tube body 10 is formed in order to pass over the cushioning plate 26 (in Figure 5The tube portion 11c of the odd-numbered coil layer in contact with the support plate 20 is arranged in the coil axis vertical direction so as to be positioned in contact with the buffer plate 26 (see FIG. 6) over the tube portion 11d. Figure 4

[0054] Further, in the LWC loading holder of the present embodiment, the buffer plate 26 on which the LWC 24 is placed is provided in the configuration as shown in Figure 8 or Figure 9 . That is, as is apparent from the planar view as shown in Figure 8 , the buffer plate 26 is constituted as a whole by a circular plate-like plate member in a circular flat plate shape having an outer diameter larger than the outer diameter of the LWC 24 by a prescribed dimension, and provided with a circular center hole 28 at the center portion thereof. Further, a plurality of recessed grooves 30 recessed and extending in parallel to each other at prescribed distances are respectively formed on the upper surface of such buffer plate 26 on which the LWC 24 is placed, at prescribed depths. Note that, in Figure 6 , Figure 8 , such plurality of recessed grooves 30 are each schematically shown by a single solid line.

[0055] More specifically, as is apparent from the planar view as shown in Figure 8 or the cross-sectional shape as shown in Figure 9 , the buffer plate 26 as a spacer plate is constituted in a configuration having a plate-like upper side plate 32, a plate-like lower side plate 34 located at a position opposed to the upper side plate 32 downwardly at a prescribed distance, and a plurality of ribs 36 linking the upper side plate 32 and the lower side plate 34 and extending in parallel to each other, the space between the upper side plate 32 and the lower side plate 34 being divided by the plurality of ribs 36, a plurality of hollow portions 38 extending in parallel to each other being formed in the extending arrangement direction of the plurality of ribs 36, and the plurality of recessed grooves 30 recessed and extending in parallel to each other at prescribed distances being respectively formed on the surface (upper surface) of the upper side plate 32 of the buffer plate 26 on which the LWC 24 is placed, at positions where the upper side plate 32 and the lower side plate 34 are linked by the ribs 36. Note that, on the ribs 36, at two positions in the middle portion in the vertical arrangement direction thereof, a curved portion 36a, 36b is respectively formed which is slightly curved in a く shape in the opposite direction, and when a load is applied to the curved portion 36a, 36b, the rib 36 is bent, and the portion of the upper side plate 32 linked by the rib 36 is easily flexed.

[0056] ​Furthermore, the buffer plate 26, having the cross-sectional shape described above, is advantageously made of a plastic material. For example, it can be easily manufactured using an extrusion molding operation with a specified plastic (resin) material, thus effectively reducing the manufacturing cost of such a buffer plate 26. It should be noted that, as an advantageously used plastic material, a polyolefin material such as polypropylene is advantageously used to facilitate good sliding of the tube body 10 constituting LWC24 on the surface of the buffer plate 26.

[0057] In particular, the structure in this embodiment, in which recesses 30, 30 are formed at the connection points of the ribs 36 with respect to the upper side plate 32 and the lower side plate 34, is advantageously achieved through the extrusion molding operation of the plastic material. That is, by performing the extrusion molding operation in such a way that the molding shrinkage of the plastic material at the connection points between the upper / lower side plates 32, 34 and the ribs 36 is sufficiently generated to form recesses of a predetermined depth on the plate surface, the recesses 30 can be effectively formed on the surface of each plate 32, 34 along the extension direction of the ribs 36. Of course, these recesses can also be formed by using a conventional extrusion molding operation using a mold for forming such recesses, in which case the recesses 30 can be formed at any position on the upper / lower side plates 32, 34.

[0058] Moreover, when LWC24 is like Figure 6 or Figure 7 As shown, it is placed in a manner where its coil axis is perpendicular to that of a device with such a coil axis. Figure 8 or Figure 9 When the buffer plate 26 with the surface morphology shown is applied, a plurality of parallel recesses 30 on the surface (upper surface) of the buffer plate 26 are positioned such that they each traverse the lower end of the annular shape of the LWC24. Therefore, at each of these plurality of recesses 30, a predetermined gap is formed between the LWC24 and the buffer plate 26, thereby effectively reducing the contact area between the LWC24 and the buffer plate 26. Furthermore, since the portion of the upper side plate 32 located between the ribs 36, or in other words, the portion located on the hollow portion 38, is more prone to bending than the position where the ribs 36 are located, moderate bending is caused by the weight of the tube 10 in the LWC24.

[0059] Therefore, when the tube 10 of each coil layer of the LWC24 is wound out from the buffer plate 26 in the manner described above, for example, by means of ETS, the tube 10 located at the bottom of the coil layer on the buffer plate 26 is pulled along the surface of the buffer plate 26 to move laterally, the tube 10 can be pulled out (wound out) at the contact portion of the surface of the buffer plate 26 with a relatively small force under a small sliding resistance.

[0060] Therefore, even if the tube 10 at the bottom of the coil layer on the buffer plate 26 is subjected to a pushing force from the tube 10 directly above it due to the weight of the coil layer, the tube 10 can be pulled out with relatively small force. This effectively avoids or reduces the occurrence of failures such as twisting caused by the large sliding resistance between the tube 10 and the buffer plate 26. Moreover, unlike the prior art, the buffer plate 26 does not have any large indentations in order to reduce the pushing force from the tube 10 directly above it on the tube 10 at the bottom of the coil layer. The multiple parallel grooves 30 are each arranged in the shape of a ring that crosses the lower end of the LWC24. Therefore, the tube 10 will not bend or partially deform due to the presence of such large indentations.

[0061] Specifically, when the LWC24 is placed on the buffer plate 26, the lowermost tube 10 of each coil layer of the LWC24 is positioned relative to the surface of the buffer plate 26. Figure 10 In the contact configuration shown in (a) or (b), in either case, the presence of the porous structure of the buffer plate 26 and the recessed strip 30 effectively generates flexure or gap, making it easier for the lowermost tube 10 to be wound out.

[0062] That is, in Figure 10 (a) shows the contact configuration of the LWC24, illustrating the state in which the tube 10 is in contact with the upper side plate 32 portion located between the two ribs 36, 36 (on the hollow portion 38) of the buffer plate 26. In this case, the upper side plate 32 portion is moderately deflected due to the weight of the coil layers stacked on the tube 10, and this contact tube 10 is positioned in a circular top view at the lower end of the LWC24, thus from Figure 6 As can be seen from the shape shown, it becomes a shape in which multiple concave strips 30 are traversed horizontally. Therefore, multiple gaps are formed between the tube body 10 and the upper side plate 32 of the buffer plate 26, which can effectively reduce the winding resistance of the tube body 10 and make it easy to wind the lower end of the tube body 10 laterally (horizontally).

[0063] in addition, Figure 10(b) The contact form shown in the lowermost tube 10 in the LWC 24 is located on the concave strip 30 formed on the upper side plate 32 of the buffer plate 26 and is supported, and here, the tube 10 including the lowermost part is subjected to the weight of the coil layer formed thereon, and as shown, the upper side plate 32 is deflected, and here, the concave strip 30 is provided to be located on the connecting portion of the rib 36, so that the rib 36 is also deflected due to the presence of the curved portions 36a, 36b thereof, but the gap formed between the upper side plate 32 and the lowermost tube 10 of the LWC 24 by the concave strip 30 still exists, and the portion of the upper side plate 32 located on the hollow portion 38 can be deflected more greatly compared to the connecting portion of the rib 36, so that the pull-out of the lowermost tube 10 to the transverse direction can be achieved with a relatively small force without causing a large sliding resistance, whereby the occurrence of a failure such as kinking can be effectively suppressed or prevented.

[0064] In addition, in the buffer plate 26 on which the LWC 24 is placed as described above, the height between the upper side plate 32 and the lower side plate 34 of the thickness thereof: h, the interval between the ribs 36, 36: pi, the thickness of each of the upper side plate 32, the lower side plate 34, and the ribs 36: ti, t2, t3, the depth: a or the width: w of the concave strip 30, the interval between the concave strips 30, 30: p2 (see Figure 11 ), and the like are appropriately determined in accordance with the size of the LWC 24 or the outer diameter of the tube 10 constituting the same.

[0065] For example, as a smooth tube or an inner surface grooved tube or the like heat transfer tube in an air conditioning device such as an air conditioner, and in addition, as a building water heating pipe, water supply pipe or the like using the LWC 24 constituted by a copper tube or an aluminum tube or the like, the outer diameter of the tube 10 in the LWC 24 is generally set to about 4 to 10 mm, and therefore, as the height h between the upper side plate 32 and the lower side plate 34 in the buffer plate 26, about 1 to 20 mm is generally used, and about 3 to 10 mm is preferably used, and in addition, as the interval pi between the ribs 36, 36, about 1 to 20 mm is generally used, and about 2 to 15 mm is preferably used, and furthermore, as the thickness ti, t2, t3 of each of the upper side plate 32, the lower side plate 34, and the ribs 36, about 2 mm or less is generally used, and about 0.1 to 1.0 mm is preferably used.

[0066] In addition, as to the concave strip 30 formed on the upper side plate 32 or the lower side plate 34 in the buffer plate 26, the size thereof is also appropriately determined in accordance with the outer diameter of the tube 10 or the like, and for example, in the case of the LWC 24 in which the outer diameter of the tube 10 is about 4 to 10 mm, the depth a or the width w of the concave strip 30 is generally set to about 0.1 to 1.0 mm, and about 0.2 to 0.5 mm is preferably used. Figure 11In the illustrated reference, as the depth of the concave grooves 30: a, a value of about 3 to 200 μm is generally used, and a value of about 5 to 100 μm is preferably used. Also, as the width of the concave grooves 30: w, a value of about 0.1 to 4.0 mm is generally used, and a value of about 0.2 to 2.0 mm is preferably used. Further, as the pitch between the concave grooves 30, 30: p2, a value of about 1 to 20 mm is generally used, and a value of about 2 to 15 mm is preferably used. By using the depth: a, the width: w, and the pitch: p2 within such ranges, the object of the present application can be advantageously achieved, and the cushioning board 26 can be used as a practical cushioning board, advantageously used as a cushioning board itself or a part of a cushioning board.

[0067] Note that in the above embodiment, the cushioning board 26 on which the LWC 24 is placed to constitute the stacked holding body of the LWC 24 as the object can be used, and a cushioning board configuration in which a support board of a prescribed thickness is arranged on the lower side of the cushioning board 26 for the purpose of reinforcement or the like, and the cushioning board 26 and the support board are fixed and integrated by an adhesive or the like can also be used.

[0068] Further, as described above, the loaded holding body obtained by placing the LWC 24 on the cushioning board 26 as illustrated in Figure 6 is packaged with a resin film or the like at least for the LWC 24 portion as in the past, or is baled by fixing the coil in a wound state with a metal or resin band, and further tightly binding the LWC 24 and the cushioning board 26 with an appropriate band or the like, so as to become a bale of the LWC 24 and be shipped, transported, and stored. Further, this bale is opened by the user such as an air conditioner manufacturer or the like at the destination of transport, and then, as described above, the LWC 24 is unwound and the pipe body 10 is taken out, and supplied to the intended use.

[0069] Note that this bale is not only the form in which one LWC 24 is placed on the cushioning board 26 constituting the cushioning board, but can also be constituted in a form in which a plurality of LWCs 24 are stacked, in which case, in the form of the loaded holding body illustrated in Figure 6 or Figure 7 two, three, or more layers are stacked.

[0070] In the form of the loaded holding body illustrated in Figure 12The configuration in the case of stacking three layers of LWC 24 is shown in FIG. 6, and in this case, in the configuration in which each LWC 24 is supported on a cushioning board 26 as a backing board, the cushioning board 26 of the upper layer of the load holding body is directly stacked on the lower layer of LWC 24. Note that, in this case, in order to convey this three-layer-stacked LWC 24, a tray 50 for conveyance is provided below the load holding body of the lowermost layer of LWC 24. Also, in this three-layer-stacked configuration, the same bundling as in the past is applied to make it a bundle, and it can be conveyed to the destination. Note that, the tray 50 can be advantageously used not only in the case of stacking a plurality of LWC 24, but also in the case of placing one LWC 24 and conveying it.

[0071] Also, in the case of stacking a plurality of LWC 24 as described above, by providing a slip stop portion on the lower surface of the backing board 26 composed of a cushioning board 26, and making the upper portion of the LWC 24 disposed below the cushioning board (backing board) 26 abut against this slip stop portion, it is possible to advantageously eliminate the concern that collapse due to sliding of the LWC 24 during conveyance will occur. In this way, by providing a slip stop portion on the lower surface of the cushioning board 26 (backing board), it is possible to prevent collapse during conveyance of the LWC 24 below, and on the other hand, on the upper surface of this cushioning board 26, it is possible to smoothly perform the unwinding of the pipe body 10 from the LWC 24 placed thereon, and it is possible to advantageously avoid the occurrence of problems such as kinking, and thus it is possible to practically and advantageously achieve the stacked conveyance of a plurality of LWC 24.

[0072] Note that, in the case of stacking a plurality of LWC 24 as described above, by providing a slip stop portion on the lower surface of the backing board 26 composed of a cushioning board 26, and making the upper portion of the LWC 24 disposed below the cushioning board (backing board) 26 abut against this slip stop portion, it is possible to advantageously eliminate the concern that collapse due to sliding of the LWC 24 during conveyance will occur. In this way, by providing a slip stop portion on the lower surface of the cushioning board 26 (backing board), it is possible to prevent collapse during conveyance of the LWC 24 below, and on the other hand, on the upper surface of this cushioning board 26, it is possible to smoothly perform the unwinding of the pipe body 10 from the LWC 24 placed thereon, and it is possible to advantageously avoid the occurrence of problems such as kinking, and thus it is possible to practically and advantageously achieve the stacked conveyance of a plurality of LWC 24. Figure 13 Different examples of the formation pattern of this slip stop portion are shown in FIGS. 7 to 9, and in Figure 13 (a), a circular ring-shaped slip stop portion 60 is formed so as to contact the entire upper surface of the LWC 24 in the lower layer. In Figure 13 (b), four slip stop portions 60 of a prescribed width are provided on the lower surface of the cushioning board 26 as a backing board in a radial pattern with a phase difference of 90°, and can exert a slip stop effect at four positions on the upper surface of the LWC 24.

[0073] In addition, this slip stop portion 60 provided on the lower surface of the backing board (cushioning board 26) can be easily formed by using a known slip stop sheet material that has been marketed as a slip stop sheet material or an antiskid sheet material up to now, and attaching it to the backing board using an adhesive or the like. Such a slip stop sheet material has, for example, a configuration in which an antiskid layer composed of an ethylene-a-olefin copolymer or the like is formed on one side or both sides of a cloth state made of a synthetic resin, and an antiskid sheet material sold on the market under the trade name of PYOLAN (PYOLAN) or the like is advantageously used.

[0074] Moreover, as described above, within the limit of being able to achieve the object of the present application, not only the lower surface of the buffer plate 26, but also the non-slip portion 60 can be provided on the upper surface of the buffer plate 26, and in the case of Figure 14 one example thereof is shown in FIG. 6. Here, the four non-slip portions 60 in the form of a band are provided with a phase difference of 90°, respectively, and thus, movement (slipping) of the LWC 24 at the time of carrying or the like, which is loaded on the upper surface of the buffer plate 26, can be advantageously suppressed or prevented. Note that, here, as shown in the figure, such non-slip portions 60 are provided only on a portion of the outer circumferential side in the radial direction of the LWC 24, and are not positioned over the entire length of the radius of the LWC 24. Figure 13 (b) are also provided with a phase difference of 90°, respectively, and thus, movement (slipping) of the LWC 24 at the time of carrying or the like, which is loaded on the upper surface of the buffer plate 26, can be advantageously suppressed or prevented. Note that, here, as shown in the figure, such non-slip portions 60 are provided only on a portion of the outer circumferential side in the radial direction of the LWC 24, and are not positioned over the entire length of the radius of the LWC 24.

[0075] The representative embodiments of the present application have been described in detail above, but this is merely an example, and it should be understood that the present application is not to be construed as being limited in any way by the specific description of the embodiments described above.

[0076] For example, in the example embodiment, the buffer plate 26 is configured in the form of a circle, but is not limited to this circular shape, and even if it is configured in the form of a polygon such as a rectangle, a pentagon, a hexagon, an octagon, or the like, there is no hindrance.

[0077] In addition, in the example embodiment, the concave grooves 30 formed on the surface of the upper side plate 32 of the buffer plate 26 are formed at the joint portions of the ribs 36 that join the upper side plate 32 and the lower side plate 34, but even if they are provided at portions of the upper side plate 32 between adjacent ribs 36, 36, there is no hindrance, and furthermore, with respect to the pitch: p2 between the concave grooves 30, 30, even if these concave grooves 30 are provided at a pitch different from the pitch: pi of the adjacent ribs 36, 36, there is no hindrance. Of course, it is sufficient that the concave grooves 30 are formed only on the surface of the upper side plate 32, and need not be formed on the surface of the lower side plate 34. However, in terms of freely selecting the two faces of the buffer plate 26 to be used, it is practically effective to form the concave grooves 30 on the surface of the lower side plate 34 as well as the upper side plate 32, as exemplified.

[0078] Moreover, with respect to the shape of the ribs 36, as exemplified, the scheme in which curved portions 36a, 36b are provided at the middle portions in the height direction thereof is effective in that it can easily cause flexural deformation when the weight of the pipe body 10 acts, but even if the ribs are in a linear shape in the vertical direction without such curved portions 36a, 36b being provided, there is no hindrance, and furthermore, in the present application, a configuration in which the upper side plate 32 and the lower side plate 34 are joined in a trapezoidal shape with ribs alternately arranged inclined in mutually different directions can also be employed.

[0079] Also, in the illustrated embodiment, the pipe body 10 is shown being unwound from the coil layer on the inner peripheral side of the LWC 24, but even if the pipe body 10 is unwound from the coil layer on the outer peripheral side of the LWC 24, there will be no hindrance.

[0080] Note that, although not enumerated one by one, the present application can be implemented in a manner in which various changes, modifications, improvements, and the like are added in accordance with the knowledge of those skilled in the art, and furthermore, these embodiments are all included in the scope of the present application as long as they do not depart from the technical idea of the present application.

[0081] Explanation of Reference Signs

[0082] 10 pipe body, 11d over pipe body portion, 12 winding drum, 14 inner cylinder, 16 side plate, 20 support plate, 18, 22, 24 flat wound coil (LWC), 26 buffer plate, 28 center hole, 30 concave strip, 32 upper side plate, 34 lower side plate, 36 rib, 36a, 36b bent portion, 38 hollow portion, 50 tray, 60 non-slip portion.

Claims

1. A flat-coiled pipe loading holding body, which is a flat-coiled pipe loading holding body in which a flat-coiled pipe is placed on a flat base plate with the coil axis of the flat-coiled pipe being perpendicular, the flat-coiled pipe having a configuration in which a plurality of coil layers are stacked with the pipe body of one of the adjacent coil layers being fitted into the recess between the pipe bodies of the other coil layers, the coil layers being formed by arranging and winding a metal pipe body, characterized in that the base plate is configured with a plate-shaped buffer plate having a plate-shaped upper side plate on which the flat-coiled pipe is placed, a plate-shaped lower side plate located at a position opposite the upper side plate at a prescribed distance downward from the upper side plate, and a plurality of ribs linking the upper side plate and the lower side plate and extending parallel to each other, the space between the upper side plate and the lower side plate being partitioned by the plurality of ribs, a plurality of hollow portions extending in the direction in which the plurality of ribs extend being formed parallel to each other.

2. The flat-coiled pipe loading holding body according to claim 1, characterized in that the plurality of recessed grooves are formed on the surface of the upper side plate parallel to the direction in which the ribs extend.

3. The flat-coiled pipe loading holding body according to claim 1 or 2, characterized in that the plurality of recessed grooves are formed at the linking portions at which the ribs are linked to the upper side plate.

4. The flat-coiled pipe loading holding body according to claim 1 or 2, characterized in that the ribs have at least one bent portion at the middle portion in the height direction thereof.

5. The flat-coiled pipe loading holding body according to claim 1 or 2, characterized in that the buffer plate is made of a plastic material.

6. The flat-coiled pipe loading holding body according to claim 1 or 2, characterized in that the base plate has a non-slip portion on the lower surface thereof, and the upper portion of the flat-coiled pipe disposed below the base plate abuts against the non-slip portion.

7. The flat-coiled pipe loading holding body according to claim 6, characterized in that the non-slip portion is formed by attaching a non-slip sheet.

8. A flat-coiled pipe loading holding body in which one or a plurality of flat-coiled pipe loading holding bodies according to any one of claims 1 to 7 are stacked, and at least the flat-coiled pipe portions are bundled.

9. A base plate for a flat-coiled pipe loading holding body, which is a base plate for a flat-coiled pipe loading holding body in which a flat-coiled pipe is placed with the coil axis of the flat-coiled pipe being perpendicular, the flat-coiled pipe having a configuration in which a plurality of coil layers are stacked with the pipe body of one of the adjacent coil layers being fitted into the recess between the pipe bodies of the other coil layers, the coil layers being formed by arranging and winding a metal pipe body, characterized in that ​ ​ ​ ​ ​ ​ 8. A bale of flat wound coils, characterized in that ​ ​ The cushion plate is configured to include a plate-shaped buffer plate, the plate-shaped buffer plate having a plate-shaped upper side plate on which the flat wound coil is placed, a plate-shaped lower side plate located at a position opposite the upper side plate at a prescribed distance downward, and a plurality of ribs linking the upper side plate and the lower side plate and extending parallel to each other, the space between the upper side plate and the lower side plate being partitioned by the plurality of ribs, a plurality of hollow portions extending in the direction in which the plurality of ribs extend being formed parallel to each other, In the cushion plate, a plurality of recessed grooves recessed and extending parallel to each other at a prescribed distance are formed on the surface of the upper side plate on which the flat wound coil is placed, and the flat wound coil is placed on the buffer plate in such a manner that the plurality of recessed grooves cross the lower end portion of the circular ring shape of the flat wound coil, respectively, whereby a prescribed gap is formed between the flat wound coil and the buffer plate at the plurality of recessed groove portions, respectively.

10. The cushion plate for a flat wound coil loading holding body according to claim 9, wherein The buffer plate is an extrusion molded product of a plastic material.

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