Cross piping part forming tool, cross piping structure and cross piping part forming device

Abstract

To easily form a cross piping part in which two fluid pipes arranged in parallel in a straight pipe protection cover are crossed by changing their layout routes midway.SOLUTION: A cross piping part forming tool A is used to cross a hot water supply pipe P1 and a water supply pipe P2 that are arranged in parallel inside a straight pipe protective cover to form a cross piping part P12 that allows a piping positions to be swapped; and is configured to comprise a substrate part 1 that is arranged between the cross piping part P12 and an installation surface, and an erect wall part 15 that is erected from the substrate part 1 and is arranged between bending start parts of the hot water supply pipe P1 and the water supply pipe P2 on both sides of the cross piping part P12.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a cross-piping part forming tool, a cross-piping structure, and a cross-piping part forming apparatus for forming a cross-piping part capable of changing a piping route by crossing two fluid pipes arranged in parallel in a piping space of a straight pipe protection cover in the middle. In addition, as used in this specification, the "cross-piping part" refers to a part where two fluid pipes arranged in parallel are crossed and piped, and the "cross-piping space" refers to a space where the above-mentioned "cross-piping part" is piped directly above the substrate part.

Background Art

[0002] Patent Document 1 discloses a structure in which one of two fluid pipes arranged in parallel is branched and piped across the other. For example, as shown in FIG. 22(b), in the parallel piping of the hot water supply pipe P1 and the water supply pipe P2 in the piping space of the straight pipe protection cover, when, for example, at two different locations in the middle of the piping, the need for branched piping occurs on different sides respectively, the branched piping to the side of the water supply pipe P2 can be achieved by using a normal pipe joint 91 such as a cheese, but to branch the water supply pipe P2 to the side of the hot water supply pipe P1, it is necessary to branch and pipe across the hot water supply pipe P1, and a special pipe joint 92 that straddles the hot water supply pipe P1 is required, and a large protection cover that covers only the portion of the special pipe joint 92 is also required. To avoid the use of the special pipe joint 92, it is also possible to open a hole in the wall whose surface is the installation surface of the straight pipe protection cover and branch it behind the wall, but the piping with the wall hole becomes large-scale, and its improvement has been desired.

[0003] Also, in the above parallel piping, if it is found during the piping work that, due to a simple mistake, the piping routes of the hot water supply pipe P1 and the water supply pipe P2 are incorrect, there is no means to change the piping routes in the middle, so the piping had to be redone from the beginning, and the piping efficiency was poor.

Prior Art Documents

Patent Documents

[0004] Patent Document 1 Japanese Patent Application Laid-Open No. 2009-264402 Summary of the Invention Problems to be Solved by the Invention

[0005] An object of the present invention is to make it possible to switch the piping routes of two fluid pipes arranged in parallel in the piping space of a straight pipe protection cover by crossing each fluid pipe in the middle thereof. Means for Solving the Problems

[0006] The invention according to claim 1 for solving the above problems is a cross-piping portion forming tool for forming a cross-piping portion that crosses two fluid pipes arranged in parallel in a straight pipe protection cover to make the piping positions interchangeable, comprising a substrate portion disposed between the cross-piping portion and the installation surface, and a standing wall portion standing from the substrate portion and disposed between the bending start portions of the two fluid pipes on both sides sandwiching the cross-piping space of the cross-piping portion.

[0007] According to the invention of claim 1, when piping two fluid pipes in a crossed manner on the substrate portion, a pair of standing wall portions arranged between the bending start portions of each fluid pipe are erected at intervals corresponding to the length of the cross-piping portion along the parallel piping direction. Therefore, after gently bending and deforming one of the two fluid pipes and arranging it in contact with the opposite sides of the pair of standing wall portions, the other fluid pipe is gently bent and deformed, and in a state of straddling the piped lower fluid pipe, it is brought into contact with the remaining opposite sides of the pair of standing wall portions. Thus, the restoring force with which each fluid pipe attempts to return to its original shape acts as a pressing force in opposite directions on both sides of the pair of standing wall portions, and in a state where the bent shape of each fluid pipe is maintained, the two fluid pipes are bent in opposite directions to form a cross-piping portion. For this reason, it is possible to relatively easily form and pipe a cross-piping portion where it is difficult to maintain the bent and deformed shape of the two fluid pipes. Incidentally, the respective restoring forces of each gently bent fluid pipe act as forces in opposite directions on both side surfaces of the standing wall portion and cancel each other out. For this reason, even if the standing wall portion does not have an excessively large rigidity (bending resistance) with respect to the respective restoring forces of each fluid pipe, such as by making the plate thickness excessively thick, it will not be inclined and deformed in one direction.

[0008] The invention of claim 2 is a cross-piping portion forming tool for crossing two fluid pipes arranged in parallel within a straight pipe protection cover to form a cross-piping portion that enables the piping positions to be interchanged, a pair of substrate portions arranged between the cross-piping portion and the installation surface and arranged in series along the parallel piping direction, at both ends along the parallel piping direction in the cross-piping space where the cross-piping portion is piped to the pair of substrate portions arranged in series, arranged between the bending start portions of each fluid pipe, and provided with standing wall portions erected from the substrate portion to maintain its bent shape.

[0009] The invention according to claim 2 is different from the invention according to claim 1 in that the substrate portion is composed of a pair, and the pair of substrate portions are arranged in series along the parallel piping direction of the fluid pipes. The function of the standing wall portion is the same as that of the invention according to claim 1. Here, in the inventions according to claims 1 and 2, the longer the length of the substrate portion or the total length of the pair of connected substrate portions, the smaller the bending angle of the two fluid pipes in the cross-piping portion can be made, and the smaller the restoring force becomes. Therefore, the work of crossing and piping the two fluid pipes becomes easier. In the invention according to claim 2, since the pair of divided substrate portions are arranged in series along the parallel piping direction, the total length in the state where the pair of substrate portions are connected can be increased, so that the handling during the piping work and the handling during non-piping operations such as storage and transportation also become easier.

[0010] The invention according to claim 3 is the invention according to claim 1 or 2, wherein a pipe pressing portion is formed so as to extend in a cantilevered manner from the upper end portion of the standing wall portion in a direction perpendicular to the parallel piping direction of the fluid pipes so as to overlap the upper side of the fluid pipe arranged on the upper side among the two fluid pipes piped across the cross-piping portion.

[0011] Among the two fluid pipes piped across the cross-piping portion, the fluid pipe arranged on the upper side is piped across the lower fluid pipe that has already been piped in a state of straddling the lower fluid pipe. Therefore, in addition to the restoring force to return to the original straight shape, a buoyancy force acts to lift the portions on both sides of the highest position to the highest position with reference to the highest position of straddling the lower fluid pipe. For this reason, as in the invention according to claim 3, a pipe pressing portion is formed to extend in a cantilevered manner from the upper end portion of the standing wall portion in a direction perpendicular to the parallel piping direction of the fluid pipes and is overlapped on the upper side of the upper fluid pipe, so that the buoyancy force of the upper fluid pipe acts on the pipe pressing portion to prevent the upper fluid pipe from floating. Moreover, the pipe pressing portion is integrally provided on the standing wall portion provided at the bending start position of the upper fluid pipe, and the formation position of the standing wall portion is far away from the highest position of the upper fluid pipe, so that the buoyancy force of the pipe pressing portion is small, and thus the floating of the upper fluid pipe can be effectively prevented.

[0012] The invention according to claim 4 is characterized in that, in the invention according to claim 3, the standing wall portion is formed to be inclined along the cross-piping direction of the fluid pipe piped below the cross-piping portion with respect to the parallel piping direction in plan view.

[0013] In the invention according to claim 4, in the cross-piping portion of the straight pipe protection cover, the fluid pipe piped below is bent along the substrate portion, and in plan view, the standing wall portion is formed on the substrate portion with a cross-piping angle along the cross-piping direction of the lower fluid pipe inclined with respect to the parallel piping direction, so that the bending start portion of the lower fluid pipe is along the standing wall portion, and the lower fluid pipe can be smoothly bent.

[0014] The invention according to claim 5 is a cross-piping structure in which a cross-piping portion capable of switching the piping positions by crossing two fluid pipes arranged in parallel in the piping space inside a straight pipe protection cover fixed to an installation surface is formed in the middle, on both sides sandwiching the cross-piping space where the cross-piping portion in the straight pipe protection cover is piped or in the middle thereof, pipe pressing portions are arranged in an overlapping manner above the fluid pipe piped above among the two crossed fluid pipes, and the floating of the fluid pipe arranged above is regulated.

[0015] The invention according to claim 5 is such that a cross-piping portion is formed in the middle of two fluid pipes arranged in parallel, and on both sides sandwiching the cross-piping space where the cross-piping portion is piped or in the middle thereof, pipe pressing portions for preventing the floating of the fluid pipe piped above among the two crossed fluid pipes are arranged to overlap the upper fluid pipe, so that the floating of the fluid pipe arranged above can be effectively regulated. The arrangement position of the pipe pressing portion may be not only on both sides sandwiching the cross-piping portion but also in the middle thereof. Further, the object to be formed with the pipe pressing portion may be either the base or the lid body constituting the straight pipe protection cover, and the floating of the upper fluid pipe can be regulated.

[0016] The invention according to claim 6 is A cross - pipe structure in which a cross - pipe section is formed in the middle, where two fluid pipes arranged in parallel in the arrangement space inside a straight - pipe protection cover fixed to the installation surface are crossed to enable the replacement of the piping positions. On both sides sandwiching the cross - pipe section, standing wall portions are erected in a direction away from the installation surface, which are arranged between the bending start portions of each fluid pipe to maintain their bending shapes. The fluid pipe arranged above the two crossed fluid pipes is restricted from rising by a pipe - pressing portion arranged above it in an overlapping state.

[0017] According to the invention of claim 6, the standing wall portions arranged on both sides sandwiching the cross - pipe section can maintain the bending shapes of the fluid pipes piped across the cross - pipe section, and the pipe - pressing portion can restrict the upward floating of the upper fluid pipe, so that both the bending shape of the lower fluid pipe arranged in the plane and the bending shape of the upper fluid pipe bent three - dimensionally in the space can be maintained.

[0018] The invention of claim 7 is based on the invention of claim 5 or 6. The straight - pipe protection cover is composed of a base arranged between the installation surface and the cross - pipe section, and a lid body assembled to the base and cooperating with the base to form the cross - pipe section inside. A part of the fluid pipe piped on the lower side in the cross - pipe section is located on the installation - surface side rather than on both sides sandwiching the cross - pipe space.

[0019] According to the invention of claim 7, since a part of the fluid pipe piped on the lower side in the cross - pipe section is located on the installation - surface side rather than on both sides sandwiching the cross - pipe space, the highest piping position of the upper fluid pipe constituting the cross - pipe section can be lowered, and the lid body designed in height based on the general section where the two fluid pipes are arranged in parallel can be used as it is, making it easier to cover the cross - section of the two fluid pipes piped across the cross - pipe section.

[0020] The invention of claim 8 is A straight tube protection cover in which a straight base and a lid are integrally assembled to form a general part installation space capable of arranging two fluid pipes in parallel inside. It consists of a cross - piping base part disposed at a location where a part of the longitudinal direction of the base of the straight tube protection cover is missing, and is provided with a cross - piping part that allows two fluid pipes to cross and their arrangement positions to be interchangeable. The lid of the straight tube protection cover can be assembled in a state straddling both a base with a part missing in the longitudinal direction and the cross - piping base part disposed at the missing location. The cross - piping base part, in cooperation with the part of the straight tube protection cover that covers the cross - piping base part, forms a cross - part installation space where a cross - piping part where two fluid pipes are cross - piped can be arranged. On both sides of the cross - piping space where the cross - piping part of the cross - piping base part is piped, standing wall parts are erected between the bending start parts of each fluid pipe to maintain their bending shapes, which is a characteristic feature.

[0021] The invention according to claim 8 relates to a combination of a straight tube protection cover in which a general part installation space capable of arranging two fluid pipes in parallel inside is formed, and a cross - piping base part provided with a cross - piping part. By the standing wall parts provided on both sides of the cross - piping part of the cross - piping base part, while maintaining the bending shapes of the respective fluid pipes, the lid constituting the straight tube protection cover covers the cross - piping part of the two fluid pipes piped to the cross - piping base part, making it impossible to visually recognize the cross - piping part of the two fluid pipes in appearance and ensuring a good appearance.

[0022] The invention according to claim 9 A straight tube protection cover in which a straight base and a lid are integrally assembled, having an installation space capable of arranging two fluid pipes in parallel inside, and a cross - piping part that allows the two fluid pipes arranged in the installation space to cross and their arrangement positions to be interchanged can be formed. A cross - pipe auxiliary tool is provided which has a standing wall portion disposed between the bending start portions of the two fluid pipes to maintain the bending shape of the fluid pipes, and is fixedly arranged at at least one of both ends along the parallel - piping direction of the cross - pipe space in which the cross - pipe portion is piped. The cross - pipe auxiliary tool is characterized by having a pipe - pressing portion arranged in an overlapping state above it to restrict the upward floating of the fluid pipe arranged above among the two fluid pipes crossing each other.

[0023] According to the invention of claim 9, a pair of cross - pipe auxiliary tools are fixedly arranged on the base of the straight - pipe protection cover at a predetermined interval, and the bending start portions of the two fluid pipes piped in a crossed state with one crossing the other are arranged on both sides of the standing wall portion of the cross - pipe auxiliary tool, so that a cross - pipe portion is formed in the middle of the two fluid pipes arranged in parallel on the base. The two fluid pipes piped in a crossed state on the base have their bending shapes maintained by the standing wall portions of the respective cross - pipe auxiliary tools, and the upward floating of the fluid pipe arranged above can be prevented by the pipe - pressing portions of the cross - pipe auxiliary tools. Also, by adjusting the interval between the pair of cross - pipe auxiliary tools fixedly arranged on the base, it becomes possible to adjust the bending angle of each fluid pipe piped in a crossed state in the cross - pipe portion. By widening the interval between the pair of cross - pipe auxiliary tools and reducing the bending angle of each fluid pipe, the operation of crossing and piping each fluid pipe becomes easier.

Advantages of the Invention

[0024] According to the present invention, a base for a cross-piping section disposed at a longitudinally partial missing portion of a base of a straight pipe protection cover, or a standing wall portion provided on a cross-piping auxiliary tool fixedly disposed on the base of the straight pipe protection cover, receives a restoring force by which each fluid pipe piped across at the cross-piping section attempts to return to its original straight shape, so that the bent shape of each fluid pipe is maintained. Further, on an upper end portion of the standing wall portion, or on a base or a lid body constituting the straight pipe protection cover, a pipe pressing portion formed so as to overlap an upper side of the upper fluid pipe prevents floating of the upper fluid pipe, and both the bent shape of the lower fluid pipe disposed in a plane and the bent shape of the upper fluid pipe three-dimensionally bent in space can be maintained. For this reason, it is possible to relatively easily form and pipe a cross-piping section in which two fluid pipes are piped across each other while maintaining their bent shapes.

Brief Description of the Drawings

[0025]

Figure 1

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Figure 22

Embodiments for Carrying Out the Invention

[0026] Hereinafter, the present invention will be described in more detail with reference to a plurality of preferred embodiments.

Example

[0027] The cross-pipe forming tool A, cross-pipe structure, and cross-pipe forming device of Example 1 of the present invention are shown in FIGS. 1 to 15. First, with reference to FIGS. 1 to 7, the cross-pipe structure and cross-pipe forming device using the cross-pipe forming tool A will be briefly described, and then the cross-pipe forming tool A that constitutes the features of Example 1 will be described in detail. As shown in FIG. 8, the hot water supply pipe P1 and the water supply pipe P2 are arranged in parallel in a straight pipe protection cover C1 having two rows of pipe paths. The straight pipe protection cover C1 is composed of a long base V1 fixed to the installation surface E and a similarly long lid L1 covering the base V1. In each of the two pipe paths of the base V1, a pair of holding pieces 71 and 72 having different shapes for holding the hot water supply pipe P1 and the water supply pipe P2 in parallel are erected on the substrate portion 73. Between the outer holding piece 72 and the substrate portion 73, an engaged portion 74 engaged with the engaging portion 78 of the lid L1 is formed. The lid L1 is formed such that side plates 76 are oppositely arranged at both ends in the width direction of the top plate portion 75, and an assembly opening 77 (see FIG. 1) is formed at the tip of each side plate 76. Inside the tip of each side plate 76, an engaging portion 78 engaged with the engaged portion 74 of the base V1 is formed. By pressing the lid L1 against the base V1, each side plate 76 of the lid L1 is elastically deformed outward and then restored to its original shape, so that the engaging portion 78 of the lid L1 and the engaged portion 74 of the base V1 are engaged, and the base V1 and the lid L1 are assembled integrally. Its internal space constitutes a general part arrangement space 79 for two fluid pipes, namely the hot water supply pipe P1 and the water supply pipe P2. The hot water supply pipe P1 and the water supply pipe P2 are arranged in parallel while being held by a pair of holding pieces 71 and 72 in each pipe path of the base V1.

[0028] The cross-piping forming tool A is arranged at a location where a part in the longitudinal direction of the base V1 constituting the straight pipe protection cover C1 is missing, for example, between two independent bases V1, and crosses the hot water supply pipe P1 and the water supply pipe P2 arranged in parallel in the straight pipe protection cover C1 to swap their piping routes, and the cross-piping part P of the hot water supply pipe P1 and the water supply pipe P2 12 is formed with a cross-piping space K1 that enables piping. As shown in FIGS. 4 to 7, the cross-piping part P of the hot water supply pipe P1 and the water supply pipe P2 12 is covered in a continuous state by the lid L1 of the straight pipe protection cover C1 with respect to the parts of the hot water supply pipe P1 and the water supply pipe P2 in the general part arranged in parallel to the base V1 of the straight pipe protection cover C1.

[0029] Next, with reference to FIGS. 9 to 16, the cross pipe portion forming tool A will be described in detail. The cross pipe portion forming tool A is formed by reversing (half-rotating) one of a pair of identical forming tool units A1 having a rectangular shape in plan view, and arranging the pair of forming tool units A1 in a point-symmetrical manner. In a state where one end face (second end face 8) along the longitudinal direction is abutted and connected to each other, it is a short plate-like member having a length twice that of the forming tool unit A1, and at both ends in the longitudinal direction thereof, the base V1 of the straight pipe protection cover C1 is connected. As shown in FIGS. 9 to 12, the forming tool unit A1 is formed by injection molding of resin, and side walls 2 having a height of about 1 / 3 of the overall width of the substrate portion 1 are erected at both ends in the width direction of the rectangular plate-like substrate portion 1, respectively. The lower end portion of the side wall portion 2 is formed in an undercut shape to form an inclined surface-shaped first engaged portion 3 that can be engaged with the engaging portion 78 of the lid L1 of the straight pipe protection cover C1. On the side of the positioning connecting portion 11 in the first engaged portion 3, the inclined surface-shaped portion of the inclined surface-shaped first engaged portion 3 bulges so as to be orthogonal to the side wall portion 2 to form a second engaged portion 4. At the center in the width direction of the forming tool unit A1, a width direction center concave groove 5 is formed along the longitudinal direction. At the center in the width direction of the first end face 6 at one end along the longitudinal direction of the substrate portion 1, a pair of positioning protrusions 7 for performing width direction positioning of the cross pipe portion forming tool A arranged in series along the parallel pipe direction Q with respect to the base V1 are inserted into a pair of positioning groove portions 70 (see FIG. 8) formed in the base V1 of the straight pipe protection cover C1 and project along the parallel pipe direction Q.

[0030] Also, on the second end face 8 at the other end along the longitudinal direction of the substrate portion 1, a positioning and connecting portion 11 for connecting the pair of forming tool units A1 to each other is integrally formed in a state where positioning along the width direction of the pair of forming tool units A1 arranged point-symmetrically is performed by reversing (half-rotating) one of the pair of forming tool units A1 having the same shape. The positioning and connecting portion 11 includes a fitting projection 12 protruding from the second end face 8 of one of the pair of forming tool units A1 and a fitting recess 13 formed facing the second end face 8 of the other and for fitting the fitting projection 12, which form a set. In addition, a fitting projection 12 protruding from the second end face 8 of the other forming tool unit A1 and a fitting recess 13 formed facing the second end face 8 of the one forming tool unit A1 and for fitting the fitting projection 12 of the other forming tool unit A1 form another set. The positioning and connecting portion 11 is configured by a combination of a total of two sets of fitting projections 12 and fitting recesses 13. The fitting recess 13 has an opening on the side of the second end face 8 and is composed of a pair of longitudinal wall plate portions 13a, a width-direction wall plate portion 13b, and a bottom wall plate portion 13c erected on the substrate portion 1. The fitting projection 12 is formed at a portion raised from the substrate portion 1 to the same height as the bottom wall plate portion 13c of the fitting recess 13 by a raised portion 14 (see FIG. 11(a)).

[0031] Therefore, as shown in FIG. 10, the fitting projection 12 and the fitting recess 13 formed on the second end face 8 of the forming tool unit A1 are arranged at the same interval D with respect to the center line M (see FIG. 10) along the longitudinal direction passing through the center of the overall width of the forming tool unit A1. Only the base end portion of the fitting projection 12 is integrally formed, and the remaining portion except the base end portion is composed of a pair of split elastic pieces 12b that are line-symmetric in the width direction with a deformation allowance gap 12a formed along the length direction in the central portion in the width direction. The pair of split elastic pieces 12b are formed to gradually widen from the base end to the tip end, and are elastically deformable so that the width becomes narrower due to the presence of the deformation allowance gap 12a. The fitting recess 13 has a planar shape corresponding to the outer shape of the fitting projection 12 during non-elastic deformation. From the second end face 8 toward the back side, its width gradually widens, and its depth is larger than the height dimension of the fitting projection 12, and the overall fitting projection 12 is fitted into the fitting recess 13.

[0032] The cross-piping portion forming tool A is formed by connecting a pair of forming tool units A1, and in the cross-piping space K1 above it, there is a cross-piping portion P where the hot water supply pipe P1 and the water supply pipe P2 are cross-piped. 12is piped. At the central portion in the width direction on the side of the first end face 6 where the pair of positioning protrusions 7 are provided on the substrate portion 1 of the forming tool unit A1, a plate-shaped standing wall portion 15 that abuts against the bending start portion of the hot water supply pipe P1 arranged on the lower side in the cross-pipe space K1 and maintains its bending shape is erected in the cross-pipe space K1 at an angle of the cross-pipe angle θ with respect to the first cross-pipe direction R1 of the hot water supply pipe P1 arranged on the lower side in the parallel piping direction Q of the hot water supply pipe P1 and the water supply pipe P2 that are arranged in parallel with the straight pipe protection cover C1. Since the hot water supply pipe P1 piped on the lower side in the cross-pipe space K1 is piped along the upper surfaces of the two substrate portions 1 constituting the cross-pipe portion forming tool A, in other words, it is piped in the same plane, the bending start portion thereof is smoothly piped along the standing wall portion 15. In a state where the hot water supply pipe P1 and the water supply pipe P2 are cross-piped in the cross-pipe space K1, on both surfaces of the plate-shaped standing wall portion 15, the respective bending start portions of the hot water supply pipe P1 and the water supply pipe P2 abut against each other, and a restoring force that tries to return to the original straight shape acts in a pressing state. So as to be able to resist the restoring force, at the end portion on the side of the first end face 6 of the standing wall portion 15 and on the side where the water supply pipe P2 is arranged, a reinforcing column portion 15a (see Fig. 9(a)) is integrally formed.

[0033] On the other hand, since the water supply pipe P2 that is cross-piped on the upper side in the cross-pipe space K1 is piped across the hot water supply pipe P1 piped on the lower side, in other words, it is piped in a three-dimensional space, the upper water supply pipe P2 in the cross-pipe portion P 12 and its extension of a predetermined length are lifted up. To prevent the floating of the upper water supply pipe P2 in the cross-pipe portion P 12 at the upper end portion of the standing wall portion 15, a pipe pressing portion 16 is integrally formed in an overhanging shape with respect to the water supply pipe P2 piped on the upper side and in a cantilever state. Specifically, the upper end portion of the plate-shaped standing wall portion 15 is bent toward the side of the water supply pipe P2 corresponding to the outer diameter of the water supply pipe P2, and the pipe pressing portion 16 is formed.

[0034] Also, in approximately half of the portion along the longitudinal direction on the side of the second end face 8 in the forming tool unit A1, in order to make the highest height position of the water supply pipe P2 piped above the cross pipe space K1 as low as possible, a pipe insertion recess 17 into which a part of the lower hot water supply pipe P1 can be partially inserted is formed along a first cross pipe direction R1 inclined by a cross pipe angle θ with respect to the parallel pipe direction Q and opens on the side of the second end face 8. The center in the width direction of the opening on the side of the second end face 8 of the pipe insertion recess 17 is located on the center line M so that the openings of the pipe insertion recesses 17 of the respective forming tool units A1 are aligned along the width direction in a state where one of the pair of forming tool units A1 is horizontally reversed (half-rotated) in the plane and the pair of forming tool units A1 are connected by the method described later. In the figure, reference numeral 18 indicates a screw insertion hole formed in the substrate portion 1 for inserting a screw for fixing the cross pipe portion forming tool A to the installation surface E, and reference numeral 19 indicates a molding hole formed by a slide mold used to mold the pipe pressing portion 16 whose lower part becomes an undercut portion during injection molding.

[0035] There are multiple ways to form a cross-pipe section forming tool A with a length twice that of the forming tool unit A1 by reversing (half-rotating) one of the pair of forming tool units A1 in a plan view and connecting them through each positioning connection part 11. For example, in the connection method shown in FIGS. 13 to 16, the fitting projection piece 12 and the fitted concave part 13 that constitute the positioning connection part 11 of the pair of forming tool units A1 face each other, that is, the pair of forming tool units A1 are arranged in series with each first end face 6 facing each other, and relatively close to each other as they are. When the fitting projection piece 12 of one forming tool unit A1 is pushed into the fitted concave part 13 of the other forming tool unit A1, the pair of split elastic pieces 12b that constitute each fitting projection piece 12 elastically deform and approach each other, and after being inserted into the fitted concave part 13, they restore to their original shapes. Thus, the fitting projection piece 12 of the other forming tool unit A1 is inserted and fitted into the fitted concave part 13 of one forming tool unit A1, and the pair of forming tool units A1 are integrally connected in a state of being arranged in series. Since the widths of the fitting projection piece 12 and the fitted concave part 13 formed on the forming tool unit A1 are tapered along the series connection direction, in the connected state of the pair of forming tool units A1, they will not separate in the series connection direction unless a separation force equal to or greater than a certain value is applied along the parallel pipe direction Q.

[0036] As shown in FIGS. 14 and 15, the cross-pipe section forming tool A in which a pair of forming tool units A1 are connected with the above structure has standing wall parts 15 respectively at both ends close to the first end face 6 along the parallel pipe direction Q. The standing wall parts 15 are inclined by the cross-pipe angle θ of the hot water supply pipe P1 arranged on the lower side in the cross-pipe space K1 with respect to the parallel pipe direction Q, and overlap with the upper side of the water supply pipe P2 where the pipe pressing parts 16 are arranged on the upper side respectively. Thus, a cross-pipe space K1 is formed in which the arrangement positions of the two fluid pipes, namely the hot water supply pipe P1 and the water supply pipe P2, arranged in parallel in the straight pipe protection cover C1 can be changed. Also, each pipe insertion recess 17 formed linearly with a predetermined width along the first cross-pipe direction R1 on each forming tool unit A1 completely coincides in the width direction at the butting part of each second end face 8. Thus, a combined pipe insertion recess 17 having a length twice that of the pipe insertion recess 17 formed on the forming tool unit A1 is formed at the central part of the parallel pipe direction Q, which is the longitudinal direction of the cross-pipe section forming tool A.

[0037] Next, with reference to FIGS. 1 to 7, a piping operation will be described in which the hot water supply pipe P1 and the water supply pipe P2 arranged in parallel in the straight pipe protection cover C1 are crossed using the cross-piping forming tool A to change the piping route. By inserting a pair of positioning projections 7 projecting from both longitudinal ends of the cross-piping forming tool A into a pair of positioning groove portions 70 of the base V1 of the straight pipe protection cover C1, the cross-piping forming tool A and the base V1 are positioned in the width direction, and the cross-piping forming tool A is arranged between the long base V1s, and the substrate portion 1 of the cross-piping forming tool A is fixed to the installation surface E using a plurality of screws 95. Both the hot water supply pipe P1 and the water supply pipe P2 are insulated by covering the outside of a resin pipe made of cross-linked polyethylene, polybutene, etc. with a thick heat insulating material 61.

[0038] First, as shown in FIGS. 2 and 3, when the hot water supply pipe P1 arranged in one of the two piping routes of the base V1 of the straight pipe protection cover C1 is piped by arranging it on the side opposite to the pipe pressing portion 16 in a pair of standing wall portions 15 arranged at both longitudinal ends of the cross-piping forming tool A, the hot water supply pipe P1 is gently bent in a plane parallel to the substrate portion 1, and the hot water supply pipe P1 starts to bend at the portions of the standing wall portions 15, and on the cross-piping forming tool A, it is piped in the first cross-piping direction R1 inclined by the cross-piping angle θ with respect to the parallel piping direction Q. The straight portions outside the respective bending start portions in the hot water supply pipe P1 are held by a pair of holding pieces 71, 72 of the base V1. As a result, due to the restoring force with which the bent hot water supply pipe P1 tries to return to its original straight shape, a pressing force F1 acts on each standing wall portion 15.

[0039] Next, by disposing the water supply pipe P2, which is piped in another piping path, on each base V1 on both sides of the cross-piping portion forming tool A below the pipe pressing portion 16 of each standing wall portion 15 of the cross-piping portion forming tool A, the water supply pipe P2 is three-dimensionally bent and deformed in the space, crosses the bent hot water supply pipe P1, and is piped across the bent hot water supply pipe P1 along the second cross-piping direction R2 having a cross-piping angle θ opposite to the first cross-piping direction R1 with respect to the parallel piping direction Q. Since the water supply pipe P2 piped across crosses the bent hot water supply pipe P1, the whole tends to float, but at the bending start portions at both ends of the bent portion, the presence of the pipe pressing portion 16 arranged in an overlapping manner above itself restricts the floating. The bending start portion of the water supply pipe P2 abuts against the standing wall portion 15 and presses the standing wall portion 15 with a pressing force F2 in the same manner as the bending start portion of the hot water supply pipe P1. The pressing force F2 of the water supply pipe P2 against the standing wall portion 15 is in a canceling relationship with respect to the pressing force F1 of the hot water supply pipe P1 against the standing wall portion 15. As a result, the pressing force substantially acting on the standing wall portion 15 is greatly reduced with respect to the pressing force F1 or F2. Therefore, the standing wall portion 15 will not be inclined and deformed in one direction even if it does not have an excessively large rigidity (bending resistance) with respect to each of the pressing forces F1 and F2 of the hot water supply pipe P1 or the water supply pipe P2, such as by making the plate thickness excessively thick.

[0040] As a result, the cross-piping part forming tool A is arranged between the respective bases V1 of the straight pipe protection cover C1, and the hot water supply pipe P1 and the water supply pipe P2 that are arranged in parallel to one base V1 are crossed and piped in the cross-piping space K1 of the cross-piping part forming tool A, thereby changing the arrangement position. The hot water supply pipe P1 and the water supply pipe P2 with the changed arrangement path are arranged in parallel to the other base V1. In this state, when the lid body L1 is covered with respect to each base V1 continuously arranged linearly and the cross-piping part forming tool A therebetween, in the part of the cross-piping part forming tool A, as shown in FIG. 7, in the part of the standing wall parts 15 at both longitudinal ends, the heat insulating materials 61 of the hot water supply pipe P1 and the water supply pipe P2 are not compressed by the lid body L1, but in the central part in the longitudinal direction, the heat insulating materials 61 of the hot water supply pipe P1 and the water supply pipe P2 are in a state of being compressed and deformed by the top plate part 75 of the lid body L1, and a part in the longitudinal direction of the lid body L1 covering both side bases V1 covers the cross-piping part forming tool A where the hot water supply pipe P1 and the water supply pipe P2 are crossed and piped. The cross-piping part P of the hot water supply pipe P1 and the water supply pipe P2 formed by a part in the longitudinal direction of the lid body L1 covering both side bases V1 and the cross-piping part forming tool A 12 The space for accommodating is the cross-part arrangement space 20 (see FIG. 7(b)). The hot water supply pipe P1 is pressed downward by the water supply pipe P2 that is piped across the hot water supply pipe P1, and the central part of the hot water supply pipe P1 in the cross-piping part P 12 enters the pipe insertion recess 17 formed in the substrate part 1 of the cross-piping part forming tool A. For the amount of entry, the highest arrangement position of the water supply pipe P2 that is piped across the hot water supply pipe P1 is lowered with respect to the hot water supply pipe P1. When the heat insulating materials 61 of the hot water supply pipe P1 and the water supply pipe P2 are compressed and deformed in the covered state of the lid body L1, the first and second engaged parts 3, 4 of the cross-piping part forming tool A and the engaging part 78 of the lid body L1 of the straight pipe protection cover C1 are enabled to engage with each other.

[0041] Also, as shown in FIG. 7(b), when the second engaged portion 4 of the cross-piping forming tool A is covered with the lid L1, since the second engaged portion 4 is substantially orthogonal to the side wall portion 2, in the state where the second engaged portion 4 of the cross-piping forming tool A and the engaging portion 78 of the lid L1 are engaged, the engaging portion 78 is bent and deformed to be engaged, so that the engaging force becomes large, and the cross-piping portion P 12 can resist the force that tries to lift the lid L1 upward. In this way, if an engaged portion that can be engaged with an engaging force larger than the engaging force of the general engaging structure in which each forming tool unit A1 and the lid L1 are engaged is provided at the central portion in the piping direction of the cross-piping forming tool A to which the cross-piping portions are connected, even when a lifting force that tries to lift the lid acts because the portion piped at the highest position of the cross-piping portion abuts against the top plate portion of the lid, the cross-piping forming tool and the lid of the straight-pipe protection cover can maintain the engagement against the lifting force.

[0042] Note that the hot-water supply pipe P1 and the water supply pipe P2 piped to the base V1 of the straight-pipe protection cover C1 are held by a pair of holding pieces 71 and 72, whereas the height-direction arrangement position of the hot-water supply pipe P1 arranged on the lower side in the cross-piping space K1 of the cross-piping forming tool A is lower than the arrangement position of the hot-water supply pipe P1 piped to the base V1, and the height-direction arrangement position of the water supply pipe P2 arranged on the upper side in the cross-piping space K1 of the cross-piping forming tool A is higher than the arrangement position of the hot-water supply pipe P1 piped to the base V1. However, at the piping transition portion of the base V1 to the cross-piping forming tool A, the piping at the piping transition portion becomes possible by being gradually and gently bent and deformed in a plane perpendicular to the base V1 or the substrate portion 1 of the cross-piping forming tool A.

[0043] Therefore, as shown in FIG. 22(a), by using the cross-piping forming tool A and changing the piping routes of the hot-water supply pipe P1 and the water supply pipe P2 during piping, for example, general pipe joints 91 can be used on both sides of the straight-pipe protection cover C1 to branch the water supply pipe P2 without straddling the hot-water supply pipe P1.

[0044] When changing the piping route by crossing two fluid pipes, the longer the length of the cross-piping portion of the two fluid pipes, the smaller the cross-piping angle of the fluid pipes. Due to the bending of the fluid pipes, the pressing forces F1 and F2 acting on the standing wall portion 15 become smaller. The cross-piping portion forming tool A of Example 1 is formed by connecting a pair of forming tool units A1, so it has the advantage of being able to increase the length of the cross-piping portion of the fluid pipes. However, the cross-piping portion forming tool may also have an integral structure. When having a split structure like the above-described cross-piping portion forming tool A, it becomes easier to handle during piping work and during non-piping operations such as storage and transportation. When the cross-piping portion forming tool has a two-split connection structure like the above-described cross-piping portion forming tool A, by arranging a dedicated intermediate member for increasing the overall length between the respective split bodies and connecting them to each other, the overall length of the cross-piping portion forming tool can be further increased.

[0045] Also, in the above Example 1, the pair of forming tool units A1 are integrally connected by a pair of positioning connection portions 11 and do not separate, so it is easy to handle during piping work. However, it is also possible to visually arrange the respective forming tool units A1 in series on the installation surface and fix them individually while remaining in a two-split state. By using the two forming tool units A1 without connecting them and leaving them in a two-split state, a space portion (step portion) where the installation surface is exposed is formed between the respective forming tool units A1. By making the space portion (step portion) perform the same function as the pipe insertion recess 17, the overall height of the cross-piping portion can be lowered and piping becomes possible.

Example

[0046] Next, with reference to FIGS. 17 to 21, the cross-pipe forming apparatus according to Embodiment 2 of the present invention will be described. The straight pipe protection cover C2 used in Embodiment 2 includes a base V2 and the lid L1 integrally assembled to the base V2. The base V2 has the holding pieces 71 and 72 missing in the straight pipe protection cover C1, and side plate portions 82 along the longitudinal direction are formed at both ends in the width direction of the substrate portion 81. Between the substrate portion 81 and the pair of left and right side plate portions 82, two rows of pipe paths 83a and 83b without a partition portion in the central portion in the width direction are formed in parallel. The lower end portions of the respective side plate portions 82 are inclined inward, and concave engaged portions 84 are continuously formed in the longitudinal direction between both ends in the width direction of the substrate portion 81.

[0047] The hot water supply pipe P1 and the water supply pipe P2 arranged in parallel in each of the pipe paths 83a and 83b of the base V2 are partially held with respect to the base V2 by fitting the fitting J shown in FIG. 21(b) at predetermined intervals along the longitudinal direction with respect to each side plate portion 82 of the base V2. The fitting J has a fitting plate portion 86 fitted to the outside of each side plate portion 82 of the base V2, which is connected by a connecting plate portion 87. At the central portion in the width direction of the connecting plate portion 87, a partition plate portion 88 is vertically provided so as to be inserted into the gap between the hot water supply pipe P1 and the water supply pipe P2 arranged in each of the pipe paths 83a and 83b of the base V2 to partially partition each pipe path 83a and 83b. Therefore, in a state where the hot water supply pipe P1 and the water supply pipe P2 are arranged in each of the pipe paths 83a and 83b of the base V2, when the fitting J is fitted to the outside of each side plate portion 82 at predetermined intervals along the longitudinal direction of the base V2, the partition plate portion 88 is arranged between the hot water supply pipe P1 and the water supply pipe P2, and the bends at both ends in the width direction of the connecting plate portion 87 are partially in contact with the hot water supply pipe P1 and the water supply pipe P2, and the hot water supply pipe P1 and the water supply pipe P2 are partially held in a state of being partially separated along the longitudinal direction of the base V2.

[0048] At an arbitrary position along the longitudinal direction of the above-described straight pipe protection cover C2, in order to form a cross-piping space K2 for piping the hot water supply pipe P1 and the water supply pipe P2 that are arranged in parallel pipes on the base V2 in a crossed manner, a pair of cross-piping auxiliary tools B are used. The cross-piping auxiliary tool B is fixed using screws 96 at the central portion in the width direction of the base V2 between the left and right piping paths 83a, 83b of the base V2, and on both sides of the upper end of the thick plate-shaped standing wall portion 21, pipe pressing portions 22 having a cross-sectional arc shape bent corresponding to the outer diameters of the hot water supply pipe P1 and the water supply pipe P2 are integrally provided. In the central portions of the standing wall portion 21 in the longitudinal direction and the width direction (plate thickness direction), screw insertion holes 23 through which the screws 96 can be inserted are formed through.

[0049] Therefore, at a portion where it is necessary to mutually interchange the piping paths of the hot water supply pipe P1 and the water supply pipe P2 on the base V2 fixedly arranged on the installation surface E, when a pair of cross-piping auxiliary tools B are arranged at a predetermined interval and the cross-piping auxiliary tool B is fixed to both the base V2 and the installation surface E using the screws 96, as shown in FIG. 18, between the pair of cross-piping auxiliary tools B on the base V2, a cross-piping space K2 is formed.

[0050] Then, as shown in FIG. 19(a), in the cross-piping space K2, when the piping path of the hot water supply pipe P1 arranged in the piping path 83a of the base V2 is interchanged and piped, the respective bending start portions before and after the hot water supply pipe P1 are respectively arranged on the opposite sides of the respective standing wall portions 21 of the pair of cross-piping auxiliary tools B before and after, and are in contact with the respective standing wall portions 21 in a pressed state. In this state, as shown in FIG. 19(b), when the water supply pipe P2 arranged in the piping path 83b is crossed and piped by straddling the hot water supply pipe P1 whose piping path has been changed in the cross-piping space K2, the respective bending start portions before and after the water supply pipe P2 are respectively arranged below the pipe pressing portions 22 of the respective cross-piping auxiliary tools B before and after, so that the floating of the upper water supply pipe P2 is restricted. The state where the cover L1 covers the base V2 with the hot water supply pipe P1 and the water supply pipe P2 crossed and piped in the cross-piping space K2 of the base V2 is shown in FIGS. 19(b) and 21(a).

[0051] Thus, in the second embodiment, in order to rearrange the piping routes of the two fluid pipes using the straight pipe protection cover C2, it is only necessary to use a pair of cross-piping auxiliary tools B with a simple configuration. In addition, since the interval between the pair of cross-piping auxiliary tools B fixedly arranged with respect to the base V2 can be freely set, by widening the interval, the cross-piping angle θ of each fluid pipe with the rearranged piping route can be reduced, the force required for bending each fluid pipe is reduced, and there is an advantage that the cross-piping work becomes easier. Further, the bending start portion in the direction perpendicular to the substrate portion 81 of the fluid pipe piped on the upper side in the cross-piping portion is the upper surface of the substrate portion 81, so that the maximum height position of the upper fluid pipe can be lowered, and the existing lid L1 can cover the base V2.

Explanation of Reference Numerals

[0052] A: Cross-piping portion forming tool A1: Single forming tool B: Cross-piping auxiliary tool C1, C2: Straight pipe protection cover K1, K2: Cross-piping space L1: Lid P1: Hot water supply pipe (fluid pipe) P2: Water supply pipe (fluid pipe) P 12 : Cross-piping portion Q: Parallel piping direction R1: First cross-piping direction R2: Second cross-piping direction V1, V2: Base θ: Cross-piping angle 1, 81: Substrate portion 11: Positioning connection portion 12: Fitting projection (positioning connection portion) 13: Fitted recess (positioning connection portion) 20: Cross-section arrangement space 15, 21: Standing wall portion 16, 22: Pipe pressing portion 17: Pipe insertion recess 79: General portion arrangement space

Claims

1. A cross-piping portion forming tool for forming a cross-piping portion that crosses two fluid pipes arranged in parallel in a straight pipe protection cover to enable the replacement of the piping positions, comprising a substrate portion disposed between the cross-piping portion and the installation surface, and a standing wall portion erected from the substrate portion and disposed between the bending start portions of the two fluid pipes on both sides sandwiching the cross-piping space of the cross-piping portion. The cross-piping portion forming tool is characterized by this.

2. A cross-piping portion forming tool for forming a cross-piping portion that crosses two fluid pipes arranged in parallel in a straight pipe protection cover to enable the replacement of the piping positions, comprising a pair of substrate portions disposed between the cross-piping portion and the installation surface and arranged in series along the parallel piping direction, and standing wall portions erected from the substrate portions and disposed between the bending start portions of the respective fluid pipes at both ends along the parallel piping direction in the cross-piping space where the cross-piping portion is piped to the pair of substrate portions arranged in series, for maintaining the bending shape thereof. The cross-piping portion forming tool is characterized by this.

3. The cross-piping portion forming tool according to claim 1 or 2, characterized in that a pipe pressing portion is formed to extend in a cantilevered manner in a direction orthogonal to the parallel piping direction of the fluid pipes from the upper end portion of the standing wall portion so as to overlap the upper side of the fluid pipe piped on the upper side among the two fluid pipes piped across the cross-piping portion.

4. The cross-piping portion forming tool according to claim 3, characterized in that the standing wall portion is formed to be inclined along the cross-piping direction of the fluid pipe piped on the lower side of the cross-piping portion with respect to the parallel piping direction in a plan view.

5. A cross-piping structure in which a cross-piping portion that crosses two fluid pipes arranged in parallel in the internal arrangement space of a straight pipe protection cover fixed to an installation surface and enables the replacement of the piping positions is formed in the middle, wherein pipe pressing portions are arranged to overlap above the fluid pipe piped on the upper side among the two crossing fluid pipes on both sides or in the middle of the straight pipe protection cover sandwiching the cross-piping space where the cross-piping portion is piped, thereby restricting the upward floating of the fluid pipe arranged on the upper side. The cross-piping structure is characterized by this.

6. A cross-piping structure in which two fluid pipes arranged in parallel in a piping space inside a straight pipe protection cover fixed to an installation surface are crossed so that the piping positions can be interchanged, and a cross-piping portion is formed in the middle. On both sides sandwiching the cross-piping portion, standing wall portions are erected in a direction away from the installation surface, which are arranged between the bending start portions of each fluid pipe to maintain its bending shape. A cross-piping structure characterized in that the fluid pipe arranged above the two crossed fluid pipes is restricted from rising by a pipe pressing portion arranged in an overlapping state above it.

7. The straight pipe protection cover is composed of a base arranged between the installation surface and the cross-piping portion, and a lid body assembled to the base and cooperating with the base to form the cross-piping portion inside. The cross-piping structure according to claim 5 or 6, characterized in that a part of the fluid pipe arranged on the lower side in the cross-piping portion is located on the installation surface side rather than on both sides sandwiching the cross-piping space.

8. A straight pipe protection cover in which a straight base and a lid body are integrally assembled to form a general part piping space in which two fluid pipes can be arranged in parallel, A cross-piping portion base provided at a location where a part of the longitudinal direction of the base of the straight pipe protection cover is missing, and having a cross-piping portion that crosses two fluid pipes so that their arrangement positions can be interchanged. The lid body of the straight pipe protection cover can be assembled in a state straddling both a base with a part of its longitudinal direction missing and the cross-piping portion base arranged at the missing location. The cross-piping portion base cooperates with a portion of the straight pipe protection cover that covers the cross-piping portion base to form a cross-piping portion arrangement space in which two fluid pipes can be arranged in a crossed manner. A cross-piping portion forming device, characterized in that standing wall portions are erected on both sides of the cross-piping space in the cross-piping portion base where the cross-piping portion is arranged, which are arranged between the bending start portions of each fluid pipe to maintain its bending shape.

9. A straight pipe protection cover in which a straight base and a lid body are integrally assembled, having a piping space in which two fluid pipes can be arranged in parallel, and a cross-piping portion capable of crossing the two fluid pipes arranged in the piping space and interchanging their arrangement positions can be formed. It is disposed between the bending start portions of the two fluid pipes and has a standing wall portion for maintaining the bent shape of the fluid pipes, and is fixedly disposed at at least one of both ends along the parallel piping direction of the cross piping space in which the cross piping portion is piped, and a cross piping auxiliary tool. The cross piping auxiliary tool is a cross piping portion forming device, characterized in that it has a pipe pressing portion disposed in an overlapping state above it in order to restrict the upward floating of the fluid pipe disposed above among the two fluid pipes crossing each other.

Images