JP4949866B2 - Protective cover for bent pipe part of hot water pipe, and piping structure of one hot water pipe having a bent part - Google Patents

Description

  The present invention relates to a bent pipe portion protective cover for accommodating and piping a bent portion of a single hot water pipe having a bent portion, and a piping structure of a single hot water pipe having a bent portion.

  As the hot water supply pipe, a synthetic resin pipe (cross-linked polyethylene pipe or cross-linked polybden pipe) that has flexibility and moderate rigidity and can be bent by hand is used. When piping a hot water supply pipe (hereinafter simply abbreviated as “pipe”) with renovation, etc., the pipe is routed in a protective cover so that the pipe route is determined. It is done. When the piping path is bent in the wall surface or in a plane perpendicular to the wall surface, the tube is bent using flexibility (most bending angle is approximately 90 °).

  However, due to thermal expansion (linear expansion) of the tube, the tube extends and abuts against the protective cover to apply a large force, so that the lid body is detached from the base constituting the protective cover. It has a bent part in the middle of the pipe, and one end of the pipe is connected to a faucet 71 such as a hot water supply source and a faucet such as a water heater, and the other end is a hot water supply 72 used as a hot water supply destination, or When connected to a branch pipe (see FIG. 10 (b) only for faucet 71 and water heater 72), both ends of the pipe constituting the pipe are firmly fixed. Since it is easy to be concentrated on the bent portion, the lid of the protective cover of the bent portion is particularly easily detached. In the protective cover that protects the straight portion of the tube, the straight portion of the tube may meander due to expansion due to thermal expansion, and the lid may be removed.

For this reason, as shown in Patent Document 1 and FIG. 10B, straight pipes P ₀ are connected to each other using elbow joints 61 at the bent portions. Also, in the straight piping section, if the total length of the pipe is long, the pipe may meander due to thermal expansion and the cover of the protective cover may come off, so the length of one straight pipe is shortened, A plurality of straight pipes P ₀ were connected using a straight joint 62 so that the whole was constructed as one straight pipe [FIG. 10 (c)]. As described above, when a large number of joints are used by shortening the length of one pipe, the number of connection points between the pipes and the joints increases, and the risk of water leakage increases correspondingly. For this reason, there is a problem in that it takes time and labor, and the total number of parts increases to increase the cost of parts and management. On the other hand, if the total length of the pipe is long, the number of joints is reduced, but the load due to thermal expansion is concentrated on the specific joint and the bent part of the pipe, so the burden on the load increases, and in the joint part, There was a problem that water leakage occurred due to poor connection, and the lid of the protective cover was removed at the bent portion as described above.

With regard to the piping at the bent portion of the conventional pipe, the elbow joint is mostly used. Therefore, the pipe is a pipe that absorbs all the expansion due to thermal expansion at the straight portion of the pipe. As a result, in order to prevent the cover of the straight tube from being removed due to thermal expansion of the tube, the piping structure in which the straight tube is shortened and each straight tube is connected by a straight joint. I was forced to adopt.
JP-A-11-101389

  In view of the above-described problems of the conventional piping structure, the present invention enables piping with a single long pipe bent in the middle of the pipe and prevents the cover of the protective cover from being removed at the bent portion of the pipe. The challenge is to make it.

In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a straight line is formed in order to accommodate and protect a bent portion obtained by bending a middle portion of a flexible synthetic water supply hot water pipe at approximately 90 °. Two connection ports formed at both ends for constituting a piping path and connecting two straight piping portion protection covers for accommodating and protecting the two straight portions of the hot water supply pipe substantially orthogonally; A bent pipe part protective cover for the hot water pipe provided with a housing space formed therein for accommodating and protecting the bent part of the hot water pipe, wherein the bent pipe part protective cover comprises a base and a lid. A bent piping path that pipes the bent portion is formed inside the body, and is formed in the vicinity of two connection ports in the base, and outside the bent piping path, Contact due to expansion due to expansion or restoring force due to bending, A restriction wall is formed for restricting the outward movement so that the bent portion forming angle formed by the two straight portions of the supplied hot water pipe is increased, and the bent pipe path is provided in the bent pipe portion protective cover. In the state where the bent portion of the hot water supply pipe is piped in the accommodating space along the storage space, an allowable entry space allowing the bent portion of the hot water hot water pipe extended by thermal expansion is located outside the bent piping path. The head of the screw inserted into the screw fixing part when the bent part of the hot water hot water pipe formed on the screw fixing part formed in the entrance allowable space in the base moves. In order to avoid sliding contact with the bent portion, a guide portion is formed on the upper surface of the base so that the bent portion does not contact the head portion of the screw and passes over the screw head portion. It is characterized by that.

One end of the hot-water supply pipe is connected to a faucet serving as a hot-water supply destination, and the other end is connected to a hot-water supply source serving as a hot-water supply source or a branch pipe connected to the hot-water supply (hereinafter referred to as “hot-water heaters”). Is done. When the hot water pipe thus piped is bent at approximately 90 ° in a plane parallel or perpendicular to the wall surface, when the hot water pipe is heated and expanded by hot water, the hot water pipe Since the both ends of the water heater are firmly fixed to faucets or water heaters, the portion where the hot water hot water pipe expands and expands meanders in two straight portions or is concentrated in the bent portion. The

  In the invention of claim 1, in the vicinity of the two connection ports of the base constituting the bent pipe portion protective cover, the outside of the bent pipe path is provided with a hot water pipe that is extended or bent by thermal expansion. A regulating wall is formed that abuts by the restoring force and regulates the outward movement so that the bent portion forming angle formed by the two straight portions of the hot water pipe bent by the restoring force is increased. Therefore, even if the hot water supply pipe is expanded by hot water supply heat, the two straight portions extending from each regulation wall to both ends of the hot water supply pipe do not move outward from the straight piping path, and the bent portion is not It is not fixed to the member. As a result, most of the extension of the hot water supply pipe due to heating is concentrated and absorbed by the bent portion, and the bent portion moves outward from the bent piping path in the protective cover. In the first aspect of the present invention, there is an allowable entry space connected to the accommodation space outside the accommodation space formed in the protective cover for accommodating the bent portion when the hot water supply pipe is not heated and is not expanded. Since the extension portion provided by thermal expansion of the hot water supply pipe is aggregated and absorbed by the bent portion accommodated in the accommodating space in the protective cover, the bent portion is accommodated by the expansion of the hot water hot water pipe. It moves to the entrance allowable space side outside and is accommodated in the entry allowable space. As a result, the bent portion that moves to the outside due to thermal expansion does not exert a force on the bent pipe portion protective cover, so that the lid body cannot be removed from the base. Further, by the above action of the two restriction walls formed in the vicinity of the two connection ports of the protective cover and outside the bent piping path, and the above action of the allowable entry space formed in the protective cover, Since the amount of meandering of the two straight portions of the hot water pipe is reduced, the cover of the protective cover of the straight pipe portion disposed in the straight piping path of the bent hot water pipe is prevented from being detached from the base. You can also.

In addition, the bent portion of the hot water supply pipe is in a state in which it is in contact with each regulating wall provided in the vicinity of the two connection ports of the base of the protective cover by a restoring force to return to the original shape. Therefore, the pipe can be firmly piped without being displaced in the protective cover. Furthermore, since it becomes possible to use a hot water supply pipe having a bent portion formed in the middle, the length of one hot water supply pipe is increased, and the number of joints for connecting the hot water supply pipes to each other is increased. Decrease significantly. As a result, the occurrence of water leakage or the like in the joint portion is drastically reduced, and the labor of piping work is reduced, so that piping can be performed efficiently. Moreover, parts cost, management cost, etc. also fall by reducing the number of joints. Furthermore, the hot water supply pipe repeats expansion and contraction depending on the presence or absence of hot water. And, since the extension of the hot water supply pipe at the time of expansion is concentrated in the bent part of the hot water supply pipe, the bent part repeats movement in the reverse direction in the bent pipe path in the protective cover and the outer part thereof, Due to the presence of the guide portion provided in the vicinity of the screw fixing portion in the base, the hot water supply pipe repeatedly moves in the reverse direction at a portion higher than the upper surface of the base by the height of the guide portion. Therefore, contact with the screw head inserted through the screw fixing part is avoided, and in extreme cases, repeated contact with the screw head causes partial breakage of the hot water pipe, resulting in leakage, etc. However, the invention according to claim 1 can prevent water leakage .

The invention according to claim 2 is the invention according to claim 1, wherein the bent portion of the hot water hot water pipe has a height inside the bent pipe path of the base so that the hot water hot water pipe cannot get over the bent water pipe. It is characterized in that guide walls for enabling piping along a pipe path is formed.

  According to the second aspect of the present invention, the hot water supply pipe is arranged along the guide wall formed with a height that the hot water supply pipe cannot get over on the inner side of the bent piping path of the base constituting the protective cover. When the bent portion is piped, the bent portion is arranged along the bent pipe path of the base. In this way, the guide wall formed on the base serves as a reference for the initial piping of the bent portion of the hot water pipe, so that the bent portion forming angle formed by the two straight portions is increased by the elastic restoring force. Therefore, piping of the hot water supply pipe having a bent portion that is difficult to handle and particularly difficult to be bent at the time of piping can be easily performed. Also, since the guide wall has a height that the hot water supply pipe cannot get over, the bent part of the hot water supply pipe is prevented from coming off from the base of the protective cover in the bent pipe protective cover during piping. Smooth piping.

  Further, the invention of claim 3 is the invention of claim 1 or 2, wherein a hot water supply pipe is brought into contact with the outside of the bent piping path in the vicinity of the two connection ports in the base. In order to smoothly guide the straight part and the bent part of the hot water pipe from the straight pipe path to the bent pipe path, an alignment part that substantially matches the pipe axis position of the pipe holding part formed on the straight pipe part protective cover is formed. It is characterized by being.

  According to the invention of claim 3, the shaft formed in the vicinity of the two connection ports in the base of the bent pipe part protective cover and outside the bent pipe path when piping the bent hot water supply pipe When the hot water pipe is brought into contact with the mating part, the pipe axis position of the shaft alignment part and the pipe axis position of the pipe holding part of the straight pipe part protective cover substantially coincide with each other. The portion that is piped from the protective cover to the bent pipe portion protective cover is smoothly guided from the straight pipe path to the bent pipe path and piped without changing the pipe axis position.

According to a fourth aspect of the present invention, there is provided a straight piping portion protective cover that constitutes a straight piping route, and a bent piping portion protective cover that is disposed at a connecting portion of two straight piping portion protective covers to constitute a bent piping route. Is formed of a flexible synthetic resin tube, one end is connected to a faucet serving as a hot water supply destination, and the other end is connected to a water heater serving as a hot water supply source, and is bent at least at one place. The bent pipe part protective cover includes two connection ports connected to the straight pipe part protective cover, and is provided outside the inner bent pipe path. An entry allowable space is formed to allow the bent portion of the hot water hot water pipe extended due to thermal expansion, and a plurality of straight portions of the single hot water hot water pipe are provided in the straight piping portion protective cover. The outer peripheral surface of the In addition, the bent portion of the hot water pipe is connected to the outer side of the bent pipe path by the extension of the hot water pipe due to thermal expansion being concentrated in the bent portion in the bent pipe portion protective cover. A hot water pipe that is bent in the bent pipe path so as to be able to enter the allowable entry space and that extends on the screw fixing portion formed in the allowable entry space in the base that constitutes the bent pipe portion protective cover. In order to avoid sliding contact between the head of the screw inserted through the screw fixing portion and the bent portion when the bent portion moves, the bent portion does not contact the head of the screw, A guide portion that passes over the head is formed on the upper surface of the base .

According to the invention of claim 4 , the plurality of straight portions of one hot water supply pipe are held by the holding portion press-contacting the outer peripheral surface in the straight piping portion protective cover and are straightly piped, and the bent portion thereof. In the bent pipe part protective cover, the bent pipe path is bent so that the extension of the hot water supply pipe due to thermal expansion is concentrated in the bent part and can enter the allowable entry space outside the bent pipe path. Because of this structure, when one hot water pipe having a bent portion is extended by thermal expansion, both ends of one hot water pipe are connected to faucets and hot water heaters so that they cannot move. At the same time, since each straight portion of the hot water pipe is firmly held in the protective cover of the straight pipe portion with the outer peripheral surface pressed against the holding portion, the extension of one hot water pipe is concentrated at the bent portion. The

Then, the bent portion where the expansion is aggregated moves into the entrance allowable space outside the bent pipe path in the bent pipe portion protective cover by the extension, and the hot water supply pipe that has been thermally expanded due to a decrease in temperature contracts. The bent portion moves in the opposite direction to that during thermal expansion and returns to the original bent piping path. Thus, when one end of a hot water supply pipe having a bent portion is extended by thermal expansion, the extension is bent when both ends are connected to faucets and water heaters so that both ends cannot move. Since the bent part enters into the allowable entry space outside the bent pipe path, it is brought into contact with the bent pipe part protective cover and exerts a force. There is no. Therefore, even if one hot water supply pipe thermally expands, the lid body does not come off with respect to the base of the bent pipe portion protective cover. Moreover, the function which can avoid the sliding contact with the hot water supply pipe which the guide part provided in the upper surface of the base which comprises a bending piping part protective cover has is the same as the invention of Claim 1.

According to a fifth aspect of the present invention, in the invention of the fourth aspect , in the bent pipe portion protective cover, a hot water supply pipe held by a holding portion of the straight pipe portion protective cover in the vicinity of each connection port. An axial alignment portion that allows the hot water supply pipe to be arranged at substantially the same position as the pipe axis is formed, and the function and effect thereof are the same as in the invention of claim 3.

Further, the invention of claim 6 is the invention according to claim 4 or 5 , wherein the bent pipe portion protective cover has an extension of the bent portion of the hot water supply pipe due to thermal expansion in the vicinity of each connection port. In order to guide to the side of the permissible space, a regulating wall is formed on the outer side of the bent pipe path to contact the outer side surface of the hot water supply pipe, and the effect is This is the same as the effect of the restriction wall of the invention of item 1.

According to a seventh aspect of the present invention, in the invention according to any one of the fourth to sixth aspects, a guide wall serving as a reference for the initial pipe is formed inside the bent pipe path inside the bent pipe portion protective cover. The operational effect is the same as that of the invention of claim 2.

According to the present invention, most of the extension of the hot water supply pipe due to heating is concentrated and absorbed by the bent portion, and the bent portion moves outward from the bent piping path in the protective cover and enters the entry allowable space. Because the bent part that moves outward due to thermal expansion does not exert any force on the bent pipe part protective cover, the lid cannot be removed from the base of the protective cover, and the straight part of the hot water pipe is less stretched Therefore, the lid of the protective cover of the straight portion is also difficult to come off. In addition, a bent portion is formed in the middle of the hot water supply pipe, and since the length of one hot water supply pipe is increased, the number of joints connecting the hot water supply pipes is reduced, so the efficiency of the piping work is also reduced. Rise. Moreover, even if the hot water hot water pipe is extended by heating due to the guide portion provided in the entry allowable space of the base, the contact between the hot water hot water pipe and the head of the screw inserted through the screw fixing portion can be avoided. Therefore, damage to the hot water supply pipe is prevented, and leakage of the hot water supply pipe that may occur in an extreme case can be prevented.

  Hereinafter, the present invention will be described in more detail with reference to a plurality of best embodiments.

First, the bent pipe portion protective cover K ₁ used for piping by bending the pipe P in a plane parallel to the wall surface 50 will be described. FIG. 1 is a perspective view showing a state where pipes P are piped to a wall surface 50 using bent pipe portion protective covers K ₁ , K ₂ , K _{3 according} to the present invention, and FIG. 2 is a first embodiment of the present invention. FIG. 3 is a perspective view of the base V ₁ , the lid L _1, and the bent pipe P constituting the bent pipe portion protective cover K ₁ , and FIG. 3 is an enlarged view of the base V ₁ of the bent pipe portion protective cover K _1. FIG. 4 is a plan view of a state where the bent portion P ₁ of the pipe P is accommodated in the bent pipe portion protective cover K ₁ and piped, and FIGS. an X ₁ -X ₁ line and X ₂ -X ₂ line sectional view of FIG. 4, FIG. 6 is a X ₃ -X ₃ taken along line of FIG. 4, 7, mainly guide wall W ₁ 8 is a perspective view of the base V ₁ of the bent pipe portion protective cover K ₁ shown in FIG. 8, FIG. 8 is an enlarged plan sectional view of the guide wall W ₁ portion of the base V ₁ , and FIG. 9 is a bent pipe portion. in bottom view of the lid L ₁ of the protective cover K ₁ That.

As shown in FIGS. 2 to 6, the bent pipe portion protective cover K ₁ is used to accommodate and protect the bent portion P ₁ when the pipe P is bent in a plane parallel to the wall surface 50. a cover, a base V ₁ to be fixed to the wall 50 via a plurality of screws B, and an accommodation space D ₁ of the said base V ₁ and delivering pipes P to accommodate protect the pipe P composed of the lid L ₁ for. The overall shape of the base V ₁ is an irregular L shape in plan view, and the outline inside the base V ₁ (the planar shape of the inner engagement wall portion 4 described later) is at a central angle of 90 °. In addition, a linear portion is continuous at both ends of a circular arc portion (curved portion) 1 having a radius R ₁ , and an outer outline (planar shape of an outer engagement wall portion 5 described later) of the base V ₁ is the center. arcuate portion of the square 90 ° a and the radius R ₁ of a much smaller radius R ₂ than the radius R ₁ has a central C ₁ and different center C ₂ of the circular arc portion straight across the (curved portion) 2 The part has a continuous shape. Therefore, the base V _1, is formed arc-shaped bent pipe paths A ₁ to be connected to the straight pipe path A ₂ defined by straight pipe section the protective cover K ₁₁ to be described later in succession, base V ₁ the bending width along the pipe direction in the portion of the pipe path a _1, from both ends to the position connecting the respective centers C _1, C ₂ have gradually wider, a position connecting the respective centers C _1, C ₂ The maximum width. As a result, by covering the lid L ₁ to the base V _1, the central portion of the portion along the bent pipe path A ₁ is along the housing space D _1, and the pipe direction of the bent pipe path A ₁ of the pipe P In the outer side portion, when the extension is concentrated on the bent portion P ₁ of the tube P due to the thermal expansion of the tube P, the allowable entry space D that allows the bent portion P ₁ to move outward and enter. ₂ (see FIGS. 2 to 4). As shown in FIGS. 4 and 5 (b), the housing space D ₁ and entry allowance space D ₂ and synthesized space, corresponding tube P is sized to accommodate three approximately simultaneously . Strictly speaking, the bent pipe portion protective cover K ₁ is formed with a synthetic pipe path in which short straight straight pipe paths are connected to both ends of the arc-shaped bent pipe path. “Bent piping route” means all piping routes formed inside the bent piping portion protective cover K ₁ (all piping routes in which short straight straight piping routes are connected to both ends of the arc-shaped bent piping route). Means.

At both ends in the width direction of the bottom plate part 3 of the base V ₁ of the bent pipe part protective cover K ₁ , the inner and outer engaging wall parts 4 and 5 extend over the entire length along the inner and outer outlines. Each is formed. As shown in FIG. 5, the upper and lower ends of the inner and outer engaging wall portions 4, 5 are lower than the tube axis C ₃ of the pipe P accommodated in the accommodating space D _1. It is the low wall part which has the height which becomes a position. Engaged portions 4a and 5a are formed on the outer surfaces of the inner and outer engaging wall portions 4 and 5 over the entire length in a form protruding outward. A guide wall serving as a pipe reference along the bent portion P ₁ of the pipe P at the time of piping at a central portion along the pipe direction in the bottom plate portion 3 and close to the inner side surface of the inner engagement wall portion 4. W ₁ is formed to bend along the piping direction. As shown in FIGS. 4, 7 and 8, the guide wall W ₁ is a cross section corresponding to the size of the pipe P so that the pipe P can be contacted at a predetermined interval along the pipe direction. In order to prevent the pair of thick wall-shaped tube contact wall portions 6 formed with arc-shaped contact surfaces 6a on the inner side and the bent portion P ₁ of the tube P from getting over the tube contact wall portions 6. , And a thin wall-like overpassing prevention wall portion 7 formed between the pair of tube contact wall portions 6. The upper end of Norikoshi prevention wall 7 is curved toward the inside of the base V _1, oblique from the side of the bent portion P ₁ of the pipe P which is plumbed to the bent pipe path A ₁ of the base V ₁ A portion that reaches the upper end is abutted to form an overpassing prevention plate portion 7 a having a height that prevents the bent portion P ₁ from climbing over the pair of tube abutting wall portions 6. Further, the pair of tube abutting wall portions 6 constituting the guide wall W ₁ is thick, whereas the overpass prevention wall portion 7 disposed between the pair of tube abutting wall portions 6 is a thin wall. because it is Jo, the connection portions of the both wall portions 6 and 7, have exposed edges 6b of the tube contact wall 6, the bent portion P ₁ of the pipe P by the edge portion 6b is damaged In order to prevent this, the small protrusion 8 corresponds to the contact surface 6a along the height direction at the inner end along the piping direction of the contact surface 6a of the pair of tube contact wall portions 6. Then it is bent and provided. 7 and 8, reference numeral 10 denotes a hole formed between the pair of left and right pipe abutting wall portions 6 in the bottom plate portion 3.

Further, as shown in FIGS. 3, 4, and 6, both end portions along the piping direction of the outer engagement wall portion 5 of the base V ₁ , and portions close to the outer engagement wall portion 5. The bent pipe P is in contact with the bent pipe path A ₁ to prevent the pipe P from moving to the outside, and at the same time, the base V of the straight pipe protection cover K ₁₁ A regulating wall W ₂ is also formed which also serves as an axis alignment portion for holding the tube P in alignment with the position of the tube axis C ₃ of the tube P held by the pair of left and right tube holding portions 43 formed in ₁₁ . The inner side surface of the regulating wall W ₂ is a contact surface 16 having a shape in which the upper end portion of the contact surface 6a on the inner side surface of the tube contact wall portion 6 is extended upward as it is [FIG. And FIG. 6). Accordingly, the abutment surface 16 is held by each pipe of the base V ₁₁ so as to coincide with the pipe axis C ₃ of the pipe P held by each pipe holding part 43 of the base V ₁₁ of the straight pipe protection cover K _11. At a specific position along the height direction in relation to the portion 43, it is constituted by an arc surface portion 16a corresponding to the outer diameter of the tube P and a vertical plane portion 16b connected to the upper end of the arc surface portion 16a.

Further, on the upper surface of the bottom plate portion 3 of the base V ₁ , a recess 9 corresponding to the position of the tube axis C ₃ of the bent portion P ₁ of the pipe P piped along the bent piping path A ₁ is formed. Screw lower holes 11a and 11b are respectively formed at a total of three locations inside the bottom plate portion 3 at both ends of the recess 9 and inside the arc portion (curved portion) 2 of the outer engagement wall portion 5. Bis under hole 11b is not formed in the entry allowance space D ₂ of the outer bend pipe path A _1, or enters the bent portion P ₁ of the pipe P is the entry allowance space D ₂ by thermal expansion, the tubes by thermal contraction When P returns to the original bent piping path A ₁ repeatedly, the head Ba of the screw B inserted through the screw lower hole 11b is repeatedly slidably contacted with the pipe P, and the specific portion of the pipe P is damaged. There is a risk of water leakage or the like, on both sides of the screw under holes 11b in order to avoid this danger, the predetermined height is parallel to the line connecting the center C ₂ of the arc portion centered C ₁ 1 and arc 2 A pair of guide portions 12 having a length H (see FIG. 5B) is formed. For this reason, the bent portion P ₁ of the pipe P entering the allowable entry space D ₂ moves along the upper surfaces of the pair of guide portions 12, so that the bent portion P ₁ of the pipe P and the head Ba of the screw B Sliding contact can be avoided. In addition, positioning protrusions 13 are formed at both end portions along the piping direction of the bottom plate portion 3 of the base V _{1 so} as to protrude along the piping direction. The positioning protrusion 13, as shown in FIGS. 4 and 6, when connecting the base V ₁₁ of the base V ₁ and straight pipe section the protective cover K ₁₁ of the bent pipe part protective cover K _1, This is a portion that is fitted in a concave groove 42 formed on the back surface of the bottom plate portion 41 of the base V ₁₁ and performs positioning in the width direction (direction perpendicular to the piping direction).

2, 5, 6 and 9, the lid L ₁ has a planar shape corresponding to the base V ₁ and a substantially U-shaped cross-sectional shape, A pair of opposing inner and outer side plate portions 31 and 32 are connected by a top plate portion 33 and the lower surface is open, and the height along the piping direction is the same, but the width is the same as that of the base V ₁ . It changes corresponding to the change of the width in the piping direction. On the inner side surfaces of the pair of inner and outer side plate portions 31 and 32 and close to the opening, the engaged portions formed on the outer sides of the inner and outer engaging wall portions 4 and 5 of the base V ₁ A plurality of engaging portions 31a and 32a that can be engaged with the portions 4a and 5a are formed. That is, each engaging portion 31a on the inner surface of each side plate portions 31 and 32 of the pair of inner and outer at both ends along the pipe direction of the lid L _1, with 32a are formed to face the outer plate portion 32 arcuate portion of the outer engagement wall portion 5 of the base V ₁ (curved portion) second engaging portion 32a in a portion corresponding to the formed, a total of five engagement portions 31a, 32a are formed in. In the state where the lid L ₁ is covered with the base V ₁ , the two end portions along the piping direction of the protective cover K ₁ are provided with two straight piping portion protective covers K ₁₁ that are piped orthogonally to each other. Each is a connection port 17 to be connected.

Also, straight pipe section the protective cover K ₁₁ are (in FIG. 6, straight pipe section the protective cover K ₁₁ is which is shown by a two-dot chain line) FIGS. 2 and 6 as shown in, base V ₁₁ and the consists lid L ₁₁ Metropolitan is covering the base V _11, the pipe P is held by the pair of pipe holder 43 formed on the base V _11. Each protective cover K ₁₁ of the bent pipe portion straight pipe portion, K ₁ is in a state where the covering of the lid L ₁₁ to the base V ₁₁ of the straight pipe portion protective cover K _11, the lid L ₁₁ is bent pipe portion The protective cover K ₁ is connected to each other so as to be covered with the end portion of the lid L ₁ along the piping direction. In FIG. 6, reference numeral 44 denotes a heat insulating material that is disposed inside the pair of left and right pipe holding portions 43 and covers the outer periphery of the pipe P.

Next, the faucet 71 is formed by piping the pipe P having the bent portion P ₁ along the wall surface 50 of the building by reforming using the bent pipe portion and the protective covers K ₁ and K ₁₁ of the straight pipe portion. The case of mounting will be described. First, as shown in FIG. 2, the bases V ₁ and V ₁₁ of the protective covers K ₁ and K ₁₁ are fixed to the wall surface with reference to the ruled line of the piping marked on the wall surface 50. First, the base V ₁ is temporarily fixed to the wall surface 50 with a double-sided tape T (see FIGS. 5 and 6) attached to the back surface of the base V ₁ of the bent pipe protection cover K ₁ . The base V ₁ is permanently fixed to the wall surface 50 via screws B inserted through a total of three screw lower holes 11a and 11b formed on the bottom plate portion 3 of the base V ₁ . Next, by fitting the positioning protrusion 13 of the base V ₁ of the bent pipe part protective cover K ₁ into the concave groove 42 of the bottom plate part 41 of the base V ₁₁ of the straight pipe part protective cover K ₁₁ , Positioning of the base V ₁₁ of the straight pipe protection cover K ₁₁ with respect to the base V ₁ of the bent pipe protection cover K ₁ is performed in the width direction, and the base V ₁₁ is attached to the wall surface via a screw (not shown). Fix to 50.

Thereafter, the bent portion P ₁ obtained by bending the pipe P is piped along the bent pipe path A ₁ of the base V ₁ of the protective cover K ₁ fixed to the wall surface 50, and the straight portion P _{2 of the} pipe P is used. Is piped along the straight piping path A ₂ of the base V ₁₁ of the protective cover K ₁₁ fixed to the wall surface 50. When the bent portion P ₁ of the pipe P is piped along the bent pipe path A ₁ of the base V ₁ , each pipe abutting wall portion constituting the guide wall W ₁ inside the bent portion P ₁ of the pipe P 6, when the guide wall W ₁ is piped with the guide wall W ₁ as a reference of the bent pipe, each connection portion between the bent portion P ₁ and the straight portion P ₂ of the pipe P is bent. by a restoring force with the pipe P, it abuts against the abutment surface 16 of the regulating wall W ₂ of both end portions along the pipe direction of the base V _1, the upper end of Norikoshi prevention wall 7 constituting the guide wall W ₁ Norikoshi with the outer peripheral surface of the swash upper side of the pipe P by preventing plate portion 7a is covered, the pipe P is plumbed to bend the pipe path a ₁ in a form being prevented overcome the guide wall W _1. In this way, the bent portion P ₁ of the pipe P is caused by the restoring force to return to the original shape, and each regulating wall W ₂ provided in the vicinity of the two connection ports 17 of the base V ₁ of the protective cover K _1. Since the piping is provided along the bent piping path A ₁ in a state of being in contact with the protective cover K ₁ , the piping can be firmly performed without being displaced in the protective cover K ₁ .

As a result, the bending angle formed by each straight line portion P ₂ of the bent tube P is deformed so as to increase, and the tube P is prevented from moving outward, and the bent portion P ₁ The pipe is piped along the bent pipe path A ₁ formed on the base V ₁ . Further, the arc surface portion 16a of the abutting surface 16 formed on the inner surface of the regulating wall W ₂ is configured so that the pipe axis C ₃ of the bent portion P ₁ of the pipe P held in contact with the arc surface portion 16a is connected to the straight pipe portion. Since it also has a function as an axis alignment portion that matches the tube axis C ₃ of the straight portion P ₂ of the tube P held by the base V ₁₁ of the protective cover K ₁₁ , the tube P is formed as described above. If the pipe to the base V _1, at the same time the bent portion P ₁ is plumbed to bend the pipe path a ₁ of the base V _1, is also being axial mating of the ends of the bent portion P _1, straight tube P The part P ₂ and the bent part P ₁ can be smoothly led from the straight pipe path A ₂ to the bent pipe path A ₁ . As a result, the bent pipe of the pipe P having the bent portion P ₁ can be smoothly performed. Note that both ends of the pipe P are connected to a joint connected to the faucet 71 and a three-way joint (both not shown) connected to the other two straight pipes piped horizontally (see FIG. 1). .

Next, when the lid body L ₁ is pushed into the base V _{1 of} the bent pipe portion protective cover K ₁ , the engaging portions 31a and 32a of the side plate portions 31 and 32 inside and outside the lid body L ₁ are the base. engaged portion 4a of V _1, is elastically deformed to the maximum outward just before passing 5a, after passing through the respective side plate portions 31 and 32 are restored to the original shape, engaged the base V ₁ parts 4a, 5a and the lid L ₁ of the engaging portion 31a, by 32a and is engaged, is integrated with the base V ₁ and the lid L ₁ (see FIG. 5). Accordingly, as shown in FIGS. 4 and 5, the bent portion P of the pipe P is formed along the inner engagement wall portion 4 of the base V ₁ by the integrated base V ₁ and the lid L _1. An accommodation space D ₁ for accommodating ₁ is formed. The housing space D ₁ is bent piping channel A ₁ next to the pipe bends P ₁ of the pipe P, a central portion along the piping direction of the bent pipe path A _1, the outside of the bent pipe path A ₁ the extension of the pipe P due to thermal expansion by aggregating the bent portion P _1, entry allowance space D ₂ of the bent portion P ₁ is allowed to enter to move outwardly is formed.

The pipe P having the bent portion P ₁ piped as described above has a joint whose both ends are connected to the tap 71 and a three-way joint connected to the other two straight pipes that are horizontally piped (whichever When the hot water is supplied to the pipe P for a long time, the extension of the pipe P due to thermal expansion causes the linear portion P ₂ of the pipe P to meander. And is absorbed by at least one of the movement of the bent portion P ₁ . In the present invention, the bent portion P ₁ of the pipe P is accommodated in a bent pipe portion protective cover K ₁ in which a large allowable entry space D ₂ is formed outside the bent pipe path A ₁ , and the bent portion of the pipe P is bent. In any of the connecting portions between the portion P ₁ and the straight portion P ₂ , free movement to the outside is restricted by the restriction wall W ₂ . That is, the bent portion P ₁ of the pipe P is piped with a structure that is easy to move to the outer permissible entry space D ₂ , so that there is no meandering deformation of the straight portion P ₂ of the pipe P or a conventional elbow joint. Therefore, most of the expansion of the pipe P as a whole is concentrated in the bent portion P ₁ . For this reason, when the pipe P is thermally expanded, the bent portion P ₁ in which the expansion is aggregated is located outside the original bent piping path A ₁ as shown by a two-dot chain line in FIGS. move and be accommodated so as to enter the entry allowance space D _2. Even if the bent portion P ₁ of the pipe P enters the entry allowance space D _2, the bent portion P _1, since does not contact the lid L ₁ of the protective cover K _1, relative to the base V ₁ There is no fear that the lid L ₁ will come off.

In addition, the pipe P repeatedly expands and contracts depending on the presence or absence of high-temperature hot water and the length of the existence / non-existence time. Although P contracts, most of the contraction is also concentrated in the bent portion P ₁ for the above reason, so that the bent portion P ₁ returns to the original bent piping path A ₁ due to thermal contraction. As described above, the pipe P repeats thermal expansion and contraction depending on the temperature of the hot water supplied to the pipe P and the length of the existence time thereof, whereby the bent portion P ₁ of the pipe P becomes the protective cover K ₁ . without contacting the lid L _1, to repeat the movement in the reverse direction between the receiving space D ₁ of the protective cover K ₁ and entry allowance space D ₂ of the outer lid L ₁ of the protective cover K ₁ is I can't come off. On the other hand, a straight line with respect to the pipe section the protective cover K _11, elongation due to thermal expansion of the pipe P is concentrated in the bent portion P _1, since the elongation becomes small due to the meandering of the linear portion P ₂ of the pipe P, the linear portion of the pipe P The amount of meandering of P ₂ is also reduced. Therefore, with respect to the linear pipe section the protective cover K _11, because the less the amount of meandering of the linear portion P ₂ of the pipe P which houses protected, it is hardly the lid L ₁₁ deviates with respect to the base V _11. As a result, the lids L ₁ and L ₁₁ of the protective covers K ₁ and K ₁₁ of the bent pipe part and the straight pipe part cannot be removed.

FIG. 10 (a) is a schematic view showing a piping structure with a single pipe P having a bent portion P _{1 according} to the present invention in comparison with a conventional piping structure. Since FIG. 10 schematically illustrates the present invention and each conventional piping structure, FIG. 10 (a) is similar to the piping structure of FIG. 1, but is not completely aligned. . As is apparent from the schematic diagram of FIG. 10, according to the piping structure of the present invention, the cover L ₁ of the cover K ₁ that protects the bent portion P ₁ of the pipe P and the cover K ₁₁ that protects the straight portion P ₂ are provided. In addition to the advantage that both of the lids L ₁₁ do not come off, the number of elbow joints used in the conventional bent portion of the pipe is halved, so that the total number of joints used in the pipe path is also halved. By halving the total number of joints used, the occurrence of water leakage and the like in the joints is drastically reduced, and the labor of piping work is reduced, so that piping can be performed efficiently. In addition, in the invention of claim 5, “faucets” and “water heaters” to which both ends of a single hot water pipe having a bent portion in at least one place are connected are “faucets” and “water heaters”. "" Itself, and of course, "connectors [elbow joint 61 of FIG. 10 (a), etc.] used to connect to other piping materials" are also included.

In the first embodiment, the guide wall W ₁ is partially formed only at the central portion along the bent piping path A _1. Therefore, when the pipe P is opened after being excessively bent, the restoring force is increased. Since both ends of the bent portion P ₁ can be naturally brought into contact with each regulating wall W ₂ , there is an advantage that the bent pipe is easy, but it is formed over almost the entire length excluding both ends of the bent pipe path A _1. It is also possible.

Subsequently, referring to FIG. 11 to FIG. 13, the bent pipe portion protective cover according to the second embodiment of the present invention is used when the bent portion P ₁ of the pipe P is disposed at the corner N ₁ of the building wall. K ₂ will be described. FIG. 11 is a perspective view showing a state where the pipe P is piped by arranging the bent part P ₁ at the entrance corner N ₁ of the building wall using the bent pipe part protective cover K _{2 according} to the present invention. 12 is a sectional view along the piping direction, and FIG. 13 is a view taken along the line YY in FIG. The bent pipe portion protective cover K ₂ includes a base V ₂ having an L-shaped side surface shape and a lid L ₂ that covers the inner surface of the base V ₂ . In the base V ₂ , engagement wall portions 82 are formed at both ends in the width direction of the bottom plate portion 81 orthogonal to the center portion in the piping direction, and pipe regulating portions 83 are respectively provided at both ends in the piping direction of the bottom plate portion 81. The guide wall W _{3 that} is formed and guides the pipe of the bent part P ₁ of the pipe P is bent along the pipe direction between the pipe regulating parts 83 at both ends, and the side facing the bottom plate part 81 is opened. In the form, one end portion is formed integrally with one engagement wall portion 82 in a cross-sectional view. For this reason, an entry allowable space D ₂ ′ is formed between the opening 84 of the guide wall W ₃ and the orthogonal bottom plate portion 81 to allow the bent portion P ₁ extended by the thermal expansion of the pipe P to enter.

The base V ₂ of the bent pipe protection cover K ₂ is fixed to the entrance corner N ₁ of the building wall via a plurality of screws B, and the bent portion P ₁ of the pipe P is opened to the guide wall W ₃ . When inserted into the guide wall W ₃ from the 84 side and opened, both ends of the bent portion P _{1 in} the piping direction come into contact with the arc-shaped regulating surface 83 a on the upper surface of each pipe regulating portion 83 by the restoring force. Thus, the pipe P is prevented from moving outward, and the bent state of the bent portion P ₁ of the pipe P is determined. In this state, when the lid L ₂ is covered with respect to the base V ₂ , the bent portion P ₁ of the pipe P disposed at the entrance corner N ₁ of the building wall maintains the bent state of the bent portion P _1. It is accommodated in the bent pipe part in a protective cover K ₂ in. The connection between the base V ₁₁ of the base V ₂ and the straight pipe portion protective cover K ₁₁ of the bent pipe portion protective cover K ₂ are the same as in Example 1.

When the pipe P is extended by thermal expansion, with its being stretched in the bent portion P ₁ is aggregated, the bent portion P ₁ is exited through the opening 84, enters the outer entry allowance space D ₂ 'of the opening 84 When the pipe P contracts due to thermal contraction, the bent portion P ₁ that has entered the allowable entry space D ₂ ′ is returned from the opening 84 to the original storage space D ₁ ′ and stored. Therefore, if the bent pipe part protective cover K ₂ is used, the extension of the bent part P ₁ of the pipe P arranged at the corner N ₁ can be absorbed in the allowable entry space D ₂ ′. lid L ₁₁ of the lid L ₂ and straight pipe portions protective cover K ₁₁ of K ₂ can be prevented that the outside.

Next, referring to FIG. 14 to FIG. 16, the bent pipe part protective cover of Example 3 of the present invention used when the bent part P ₁ of the pipe P is arranged at the protruding corner N ₂ of the building wall. K ₃ will be described. FIG. 14 is a perspective view showing a state where the pipe P is piped by arranging the bent part P ₁ at the protruding corner N ₂ of the building wall using the bent pipe part protective cover K _{3 according} to the present invention. 15 is a sectional view along the piping direction, and FIG. 16 is a sectional view taken along the line ZZ in FIG. The bent pipe portion protective cover K ₃ includes a base V ₃ having an L-shaped side surface shape and a lid L ₃ that covers the outer surface of the base V ₃ so as to cover it. The base V ₃ is both ends in the width direction of the bottom plate portion 91 orthogonal to the central portion in the piping direction, and engaging wall portions 92 are formed at both ends along the piping direction. A pipe regulating portion 93 having an arc shape in cross section is formed at both ends in the piping direction, and a bulge for increasing the curvature radius of the bent portion P ₁ of the pipe P is formed in the center portion along the piping direction of the bottom plate portion 91. In this configuration, the protruding portion 94 is formed. On the other hand, the lid body L _{3 that} is covered with the base V ₃ by engagement is formed with a bulging portion 95 in which the central portion along the piping direction bulges outward and is formed inside the bulging portion 95. Is configured to be an allowable entry space D ₂ ″.

Therefore, the external corner portion N ₂ of the building wall via a plurality of screws B after fixing the base V _3, the base of each connection portion between the bent portion P ₁ and the linear portion P ₂ of the pipe P V ₃ , each connecting portion of the pipe P is brought into contact with the inner peripheral surface of each pipe restricting portion 93 by the restoring force of the bent tube P, and the bent portion P ₁ is bent. State is maintained. After that, when the lid L ₃ is covered with respect to the base V ₃ , the bent portion P ₁ of the pipe P has a protective cover K ₃ in a form in which an allowable entry space D ₂ ″ is formed outside the bent pipe path. It is housed and protected. For this reason, even if the pipe P piped to the projecting corner N ₂ of the building wall is thermally expanded, the bent part P ₁ enters the outer permissible space D ₂ ″ and is protected by the thermal expansion of the pipe P. lid L ₁₁ of the lid L ₃ and straight pipe portions protective cover K ₁₁ of the cover K ₃ can be prevented that the outside. In FIG. 15, D ₁ ″ indicates the accommodation space of the bent portion P ₁ of the pipe P formed in the bent pipe path of the protective cover K ₃ .

The pipe P using a bent pipe portion protective cover K _1, K _2, K ₃ according to the present invention is a perspective view of a state in which the pipe to the wall 50. It is a perspective view of a base V ₁ and the lid L ₁ and bent the pipe P which constitutes a bent pipe portion protective cover K ₁ of the first embodiment of the present invention. It is an enlarged perspective view of the base V ₁ of the bend pipe portion protective cover K _1. The bent pipe part protective cover K ₁ accommodates the bent portion P ₁ of the pipe P is a plan view of a state in which the pipe. (A) and (B) are sectional views taken along lines X ₁ -X ₁ and X ₂ -X _{2 in} FIG. 4, respectively. FIG. 5 is a view taken along the line X ₃ -X _{3 in} FIG. 4. The guide wall W ₁ is a perspective view of a base V ₁ of the bend pipe portion protective cover K ₁ shown mainly. It is an enlarged plan sectional view of the guide wall W ₁ of the portion of the base V _1. It is a bottom view of the lid L ₁ of the bent pipe part protective cover K _1. (A) is a schematic diagram of a piping example according to the present invention, and (B) and (C) are schematic diagrams of a conventional piping example. Using a bent pipe portion protective cover K ₂ according to the present invention, the pipe P by disposing the bent portion P ₁ in the inner corner portion N ₁ of a building wall is a perspective view showing a state in which plumbed. It is a sectional view (longitudinal sectional view) along the piping direction. It is a YY line arrow directional view of FIG. Using a bent pipe portion protective cover K ₃ according to the present invention, the pipe P by disposing the bent portion P ₁ on the external corner portion N ₂ of the building wall is a perspective view showing a state in which plumbed. It is a sectional view (longitudinal sectional view) along the piping direction. It is the ZZ sectional view taken on the line of FIG.

A ₁ : Bent piping route
A _2: straight line pipe route
B: Screw
Ba: Screw head
C _3: the tube axis
D ₁ : Containment space D ₂ , D ₂ ', D ₂ ″: Allowable entry space
K ₁ ~K _3: bent pipe portion protective cover
K ₁₁ : Straight pipe protective cover
L _{1 to} L ₃ : lid
P: Hot water supply pipe having a bent portion
P ₀ : Straight tubular hot water pipe
P ₁ : Bending part of hot water pipe
P ₂ : Straight section of the hot water pipe
V ₁ ~V _3: base
W ₁ , W ₃ : Guide wall
W ₂ : Restriction wall (axis alignment part)
7: Passover prevention wall
12: Guide section
17: Connection port
50: Wall surface
83, 93: Pipe regulating part (regulating wall part)

Claims (7)

In order to accommodate and protect a bent portion obtained by bending a middle portion of a flexible synthetic-resin-made hot-water hot water pipe at approximately 90 °, a straight piping path is formed, and two of the hot-water hot water pipes are formed. In order to accommodate and protect the two connection ports formed at both ends in order to connect the two straight pipe part protection covers for accommodating and protecting the straight part so as to be substantially orthogonal to each other, and the bent portion of the hot water pipe A bent piping part protective cover for a hot water pipe provided with a storage space formed in
The bent pipe part protective cover has a base and a lid assembled to each other, and a bent pipe path for piping the bent part is formed inside,
2 of the bent hot water pipe that is in the vicinity of the two connection ports in the base and is in contact with the outside of the bent pipe path by the expansion due to the thermal expansion of the hot water pipe or the restoring force due to the bent. A restriction wall is formed that restricts movement to the outside so that the bent portion forming angle formed by the two straight portions increases.
In the bent pipe part protective cover, an entry that allows the bent part of the hot water hot water pipe extended by thermal expansion in a state where the bent part of the hot water hot water pipe is piped in the accommodation space along the bent pipe route. An allowable space is formed outside the bent piping path and connected to the accommodating space,
When the bent portion of the hot water supply pipe extending on the screw fixing portion formed in the entry allowable space in the base moves, the sliding between the screw head inserted through the screw fixing portion and the bending portion is performed. In order to avoid contact, the water supply hot water is characterized in that a guide portion is formed on the upper surface of the base so that the bent portion does not contact the head of the screw and passes over the head of the screw. Protective cover for bent pipes. Inside the bent pipe path in the base, have a height that the water supply hot water pipe is not overcome, the guide wall to allow piping and along the bent portion of the water supply hot water pipe to the bent pipe path formed The bent piping part protective cover for the hot water supply pipe according to claim 1, wherein the cover is a bent pipe part protective cover.   Near the two connection ports in the base, and outside the bent piping path, a straight line and a bent portion of the hot water pipe are bent from the straight piping path by contacting the hot water pipe. The hot water supply water according to claim 1 or 2, wherein an axial alignment part that substantially coincides with a pipe axis position of a pipe holding part formed in the straight pipe part protective cover is formed so as to smoothly lead to the path. Protective cover for bent pipes. Synthetic resin having flexibility by a straight pipe part protective cover constituting a straight pipe path and a bent pipe part protective cover constituting a bent pipe path provided at a connection part of two straight pipe part protective covers It is formed of a pipe, one end is connected to a faucet serving as a hot water supply destination, the other end is connected to a water heater serving as a hot water source, and one water hot water pipe having a bent portion in at least one place The structure of piping,
The bent pipe portion protective cover includes two connection ports connected to the straight pipe portion protective cover, and allows the bent portion of the hot water supply pipe extended by thermal expansion to enter the outside of the inner bent pipe path. An entry allowance space is formed,
The plurality of straight portions of the single hot water pipe are straightly piped by a holding portion that presses the outer peripheral surface of the hot water pipe in the straight pipe portion protective cover, and the bent water pipe is bent. In the bent pipe part protective cover, the bent pipe is arranged so that the expansion of the hot water supply pipe due to thermal expansion is concentrated in the bent part so that the bent pipe part can enter the allowable entry space outside the bent pipe path. Bent pipe in the path,
The head of the screw inserted through the screw fixing portion when the bending portion of the hot water supply pipe extending on the screw fixing portion formed in the allowable entry space in the base constituting the bent pipe portion protective cover moves. In order to avoid sliding contact between the bent portion and the bent portion, a guide portion is formed on the upper surface of the base so that the bent portion does not contact the head portion of the screw and passes over the screw head portion. one piping structure of the feed water hot water pipe having a bent portion, characterized in that there. In the bent piping part protective cover, a hot water supply pipe can be arranged in the vicinity of each connection port at substantially the same position as the pipe axis of the hot water pipe held by the holding part of the straight piping part protective cover. The piping structure of one hot water supply pipe having a bent portion according to claim 4 , wherein an axial alignment portion is formed. In the bent pipe part protective cover, it is arranged outside the bent pipe path in order to guide the extension of the bent part of the hot water supply pipe due to thermal expansion to the entrance allowable space side in the vicinity of each connection port. one piping structure of the feed water hot water pipe having a bent portion according to claim 4 or 5, characterized in that the regulating wall is formed in order to abut the outer surface of the water supply hot water pipe Te. The bent portion according to any one of claims 4 to 6 , wherein a guide wall serving as a reference for initial piping is formed inside the bent piping portion protective cover inside the bent piping route. Piping structure of one water supply hot water pipe.

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