Telescopic pipe with cartridge

Abstract

To provide a telescopic pipe with a cartridge that allows a cartridge inside a pipe to be easily attached and detached.SOLUTION: A telescopic pipe with a cartridge 100 comprises a telescopic pipe body 1 installed in water supply equipment, a cartridge 2 accommodated inside the telescopic pipe body 1 and having a valve function, and a cap 3 detachably provided at one open end portion 11a of the telescopic pipe body 1. The cap 3 includes a top plate portion 31 provided with a through hole 33 penetrating in a thickness direction, and a side plate portion 32 erected on an outer peripheral edge of the top plate portion 31, and presses and fixes the cartridge 2 accommodated inside the telescopic pipe body 1. Accordingly, after the cartridge 2 is accommodated inside the telescopic pipe body 1, the cartridge 2 can be fixed simply by attaching the cap 3, while fixation of the cartridge 2 accommodated inside the telescopic pipe body 1 can be released simply by removing the cap 3 from the telescopic pipe body 1.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an expandable pipe with a cartridge, which is installed in a water supply facility and has a cartridge that functions as a valve or strainer. [Background technology]

[0002] Conventionally, there have been known expandable pipes installed in water supply equipment such as stop valves, which have cartridge-type check valves inside the pipes. Because such expandable pipes have cartridge-type check valves, when a valve that has worn out due to use needs to be replaced, the cartridge can be replaced without the need to take the trouble of disassembling the pipe and removing the valve itself.

[0003] However, conventional telescopic pipes with cartridges have a groove formed on the inner surface of the telescopic pipe into which a metal fixing jig (such as a C-shaped retaining ring) can be fitted, and the fixing jig is fitted into the groove with the cartridge housed inside, and the fixing jig presses the cartridge via a washer, thereby fixing the cartridge inside the telescopic pipe (see Figure 1 of Patent Document 1).As a result, when it is necessary to temporarily remove the cartridge for a water flow test in which water is passed through from the secondary side for a pressure test of the pipe, or for maintenance work, the following problems arise. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Jpn. Appl. KOKAI Publication No. 4-101089 Summary of the Invention [Problem to be solved by the invention]

[0005] First, when removing the cartridge from the telescopic tube, it is necessary to first remove the fixing jig (C-shaped retaining ring, etc.) that secures the cartridge from the telescopic tube, but removing this fixing jig (C-shaped retaining ring, etc.) is extremely time-consuming. For example, it is necessary to use a special tool to temporarily deform the fixing jig (C-shaped retaining ring, etc.) to release it from the groove, and then pull it out while it is still deformed.

[0006] Secondly, when returning the cartridge to the telescopic pipe after a water flow test or maintenance work is completed, the fixing jig (C-shaped retaining ring, etc.) that secures the cartridge must be reattached to the telescopic pipe, but the task of attaching this fixing jig (C-shaped retaining ring, etc.) is time-consuming. For example, it was necessary to temporarily deform the fixing jig (C-shaped retaining ring, etc.) using a special tool to insert it into the pipe, and then release the deformation to fit it into the groove.

[0007] Thirdly, because the fixing jig (C-shaped retaining ring, etc.) is temporarily deformed using a special tool, there is a risk that it may not completely return to its original shape after the deformation is released.

[0008] The present invention has been made in view of the above-mentioned problems, and has an object to provide an extension tube with a cartridge that allows the cartridge to be easily attached and detached. [Means for solving the problem]

[0009] In order to achieve the above-mentioned object, the telescopic pipe with cartridge of the present invention comprises an telescopic pipe body to be installed in a water supply facility, a cartridge housed inside the telescopic pipe body and having the function of a valve or strainer, and a cap removably provided on one open end of the telescopic pipe body, wherein the cap has a through-hole that penetrates through in the thickness direction and presses and fixes the cartridge housed inside the telescopic pipe body.

[0010] With this, after the cartridge is housed inside the telescopic tube body, it can be fixed simply by attaching the cap, while the fixation of the cartridge housed inside the telescopic tube body can be released simply by removing the cap from the telescopic tube body, so the cartridge can be easily attached and detached manually without using tools.

[0011] Furthermore, the telescopic pipe body may have a male or female thread formed on the outer or inner peripheral surface of one open end, and the cap may include a top plate portion having a through hole penetrating through in the thickness direction and a side plate portion erected on the top plate portion, with a female or male thread portion formed on the inner or outer peripheral surface of the side plate portion, and the male thread portion and the female thread portion threadably engage with each other, thereby making the cap detachable from the telescopic pipe body. According to this, the cap is attached to the telescopic pipe body by threading the male thread portion and the female thread portion together, and the cap can be removed from the telescopic pipe body by releasing the engagement between the male thread portion and the female thread portion, so that the cap can be easily attached and detached from the telescopic pipe body.

[0012] Furthermore, the cap may have a radially protruding convex portion or a recessed concave portion formed on the inner peripheral edge of the through hole. With this, when attaching or detaching the cap to or from the telescopic pipe body, fingers can fit into the convex portion or recess of the through hole in the cap, thereby improving the ease of holding the cap and workability.

[0013] The cap may also be manufactured by casting the same metal material as the telescopic tube body, which prevents the cap from slipping due to the casting surface texture, improving the ease of holding the cap and workability.

[0014] Furthermore, the cap may have irregularities formed on the outer peripheral surface of the side plate portion. With this, when attaching or detaching the cap to or from the telescopic tube main body, the irregularities (e.g., knurling) on ​​the outer peripheral surface of the side plate portion of the cap prevent fingers from slipping, thereby improving the ease of holding the cap and workability.

[0015] The telescopic pipe body may also be provided with an O-ring on its outer circumferential surface, and the O-ring may be sandwiched between the base end of the side plate portion of the cap and the telescopic pipe body. This allows the O-ring to be easily fixed to the telescopic pipe body by attaching the cap to the telescopic pipe body, thereby improving the airtightness and liquid-tightness between the cap and the telescopic pipe body. Furthermore, because the O-ring is exposed to the outside between the cap and the telescopic pipe body, when connecting the cap side of the telescopic pipe to a water supply facility (e.g., a stop valve or a water meter), the O-ring prevents damage to the telescopic pipe and the water supply facility and improves the airtightness and liquid-tightness between the telescopic pipe and the water supply facility. Furthermore, the frictional force of the O-ring sandwiched between the cap and the telescopic pipe body prevents the cap from loosening.

[0016] The cap may also be provided with an O-ring on the outer peripheral surface of the side plate portion, thereby preventing axial misalignment of the telescopic pipe when the cap side of the telescopic pipe is connected to the water supply equipment by the O-ring provided on the outer peripheral surface of the side plate portion of the cap and the O-ring provided between the cap and the telescopic pipe body.

[0017] The cap may be provided with a detachable attachment that fits into the through hole, and the attachment, when attached to the cap, may disable the function of the cartridge by pressing the cartridge in the axial direction via the through hole. According to this, when performing a water flow test in which water flows from the secondary side or maintenance work, the function of the cartridge is disabled simply by attaching the attachment to the through hole of the cap, so there is no need to take the trouble of disassembling the telescopic tube to remove the cartridge, thereby improving workability.

[0018] The telescopic pipe may further include a second cap that is detachably attached to one open end of the telescopic pipe main body and that presses and fixes the cartridge housed inside the telescopic pipe main body, the second cap including a top plate portion having a through-hole that penetrates through the thickness direction and a protrusion that stands upright on the top plate portion, and when the second cap is attached to one open end of the telescopic pipe main body, the protrusion presses the cartridge in the axial direction, thereby disabling the function of the cartridge. According to this, when performing a water flow test in which water flows from the secondary side or maintenance work, the function of the cartridge can be disabled simply by replacing the cap with the second cap, eliminating the need to take the trouble of disassembling the telescopic pipe to remove the cartridge, and improving workability. [Effects of the Invention]

[0019] According to the present invention, after the cartridge is housed inside the telescopic tube body, the cartridge can be fixed simply by attaching the cap, while the fixation of the cartridge housed inside the telescopic tube body can be released simply by removing the cap from the telescopic tube body, so the cartridge can be easily attached and detached manually without using tools.

[0020] Therefore, because no fixing jig (C-shaped retaining ring, etc.) is provided to secure the cartridge to the telescopic pipe, there is no need to use tools to remove the fixing jig (C-shaped retaining ring, etc.) from the telescopic pipe when removing the cartridge from the telescopic pipe, which saves time and effort. Also, when returning the cartridge to the telescopic pipe after a water flow test or maintenance work is completed, there is no need to reattach the fixing jig (C-shaped retaining ring, etc.) to secure the cartridge to the telescopic pipe, which saves time and effort. Furthermore, because the cap can be attached and detached from the telescopic pipe body multiple times, there is no risk of it not restoring to its original shape. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a side view showing the overall configuration of a stop valve connected to an expandable tube with a cartridge according to the present invention. FIG. [Figure 2]FIG. 2 is a side view of the telescopic tube with cartridge of FIG. 1. [Figure 3] FIG. 2 is a cross-sectional view of the telescopic tube with cartridge of FIG. 1. [Figure 4] FIG. 2 is a front view of the telescopic tube with cartridge of FIG. 1. [Figure 5] FIG. 2 is a rear view of the telescopic tube with cartridge of FIG. 1. [Figure 6] FIG. 2 is an exploded view of the telescopic tube with cartridge of FIG. 1. [Figure 7] FIG. 10 is a partial cross-sectional view of an expansion tube with a cartridge according to a first modified example. [Figure 8] FIG. 10 is a front view of an expandable tube with a cartridge according to a second modified example. [Figure 9] FIG. 10 is a partial cross-sectional view of an expandable tube with a cartridge according to a second embodiment. [Figure 10] FIG. 10 is a partial cross-sectional view of an expandable tube with a cartridge according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0022] First Embodiment Next, a first embodiment of an expandable pipe with a cartridge according to the present invention (hereinafter referred to as the expandable pipe 100) will be described with reference to Figures 1 to 6. In this specification, the left side of Figure 1 will be referred to as the "primary side," and the right side of Figure 1 will be referred to as the "secondary side."

[0023] 1 , the expandable pipe 100 is provided in a stop valve 200 that switches between allowing and stopping water flowing from a water main pipe (not shown) to a water meter unit. The stop valve 100 includes a valve box 201 having an internal flow path for passing fluid, a ball valve element 202 that is provided inside the valve box 201 and can open and close the flow path in the valve box 201 by rotating around its axis, an operating rod 203 that rotates the ball valve element 202, an inlet pipe 204 that is provided on the primary side of the valve box 201 and allows fluid to flow into the flow path in the valve box 201, and an outlet pipe 205 that is provided on the secondary side of the valve box 201 and allows fluid to flow out of the flow path in the valve box 201, and the expandable pipe 100 is connected to the outlet pipe 205 with a cap nut 206.

[0024] As shown in Figures 2 to 6, the telescopic pipe 100 comprises a telescopic pipe main body 1 connected to a stop valve 200, a cartridge 2 housed inside the telescopic pipe main body 1 and functioning as a check valve, and a cap 3 removably attached to the primary side opening end 11a of the telescopic pipe main body 1, and is arranged axially movable between the primary side stop valve 200 and a secondary side water pipe (not shown), thereby enabling it to expand and contract relative to the stop valve 200.

[0025] The telescopic pipe body 1 comprises a large-diameter pipe section 11 provided on the primary side and a small-diameter pipe section 12 provided on the secondary side of the large-diameter pipe section 11, and at the boundary between the large-diameter pipe section 11 and the small-diameter pipe section 12, it is provided with an outer surface step section 13 whose outer diameter changes along the axial direction, and an inner surface step section 14 whose inner diameter changes.

[0026] The large diameter pipe section 11 is inserted in a tight fit inside the outlet pipe 205 of the stop valve 200, whereby the telescopic pipe 100 is arranged coaxially with the outlet pipe 205. At this time, if the distance between the stop valve 200 on the primary side and a water pipe (not shown) on the secondary side is long, the telescopic pipe 100 is arranged in a position where it extends from the outlet pipe 205 of the stop valve 200, whereas if the distance between the stop valve 200 on the primary side and a water pipe (not shown) on the secondary side is short, the telescopic pipe 100 is arranged in a position where it is inserted deep into the outlet pipe 205 of the stop valve 200 and contracted.

[0027] Furthermore, when the cartridge 2 is inserted into the large diameter pipe section 11 from the primary side opening end 11a, the cartridge 2 is housed in a manner that it fits into the internal space 11b. At this time, the inner surface step 14 functions as a stopper that restricts movement of the cartridge 2 toward the small diameter pipe section 12. The large diameter pipe section 11 has a male thread section 11c formed on the outer circumferential surface of the primary side opening end 11a.

[0028] 3, the large-diameter pipe section 11 is provided with an annular ridge 11d extending circumferentially in its axially intermediate section, and an O-ring 11e is sandwiched on its outer circumferential surface between the ridge 11d and a base end 32b of a side plate 32 of the cap 3, which will be described later. Thus, by attaching the cap 3 to the telescopic pipe body 1, the O-ring 11e is easily fixed to the telescopic pipe body 1, thereby improving the airtightness and liquidtightness between the cap 3 and the telescopic pipe body 1. Furthermore, because the O-ring 11e is exposed to the outside between the cap 3 and the telescopic pipe body 1, when the cap 3 side of the telescopic pipe 100 is connected to the outflow pipe 205 of the stop valve 200, the O-ring 11e prevents damage to the telescopic pipe 100 and the stop valve 200 and improves the airtightness and liquidtightness between the telescopic pipe 100 and the stop valve 200. Furthermore, the frictional force of the O-ring 11e sandwiched between the cap 3 and the telescopic pipe body 1 can also prevent the cap 3 from loosening.

[0029] A cap nut 12c is rotatably mounted on the outer circumferential surface of the secondary-side open end 12a of the small-diameter pipe 12, and a water pipe (not shown) is connected to the inside of the cap nut 12c. An O-ring 12b is provided between the secondary-side open end 12a of the small-diameter pipe 12 and the cap nut 12c to improve watertightness.

[0030] The cartridge 2 includes a valve seat 21 provided on the primary side, a valve element 22 that is axially movable between a closed position in contact with the valve seat 21 and an open position away from the valve seat 21, a spring 23 that biases the valve element 22 to the primary side, and a cartridge case 24 that houses each of these components. In this embodiment, an O-ring 25 is provided at a corner of the cartridge 2 on the cap 3 side.

[0031] The cap 3 comprises a top plate portion 31 provided with a through-hole 31a penetrating in the thickness direction (axial direction), and a side plate portion 32 erected on the outer periphery of the top plate portion 31, and a female thread portion 32a is formed on the inner circumferential surface of the side plate portion 32 so as to be able to thread onto the male thread portion 11c of the large diameter pipe portion 11. When the cap 3 is attached to the telescopic pipe main body 1, the top plate portion 31 presses the valve seat 21 of the cartridge 2 to the secondary side, thereby fixing the cartridge 2 inside the telescopic pipe main body 1.

[0032] According to this, when fitting the cap 3 onto the outside of the primary side opening end 11a of the telescopic pipe main body 1, the male threaded portion 11c of the telescopic pipe main body 1 and the female threaded portion 32a of the cap 3 are screwed together, thereby attaching the cap 3 to the telescopic pipe main body 1, and when the male threaded portion 11c of the telescopic pipe main body 1 and the female threaded portion 32a of the cap 3 are unscrewed, the cap 3 is removed from the telescopic pipe main body 1, so the cap 3 can be easily attached and detached from the telescopic pipe main body 1.

[0033] 2, the cap 3 has knurled or other irregularities formed on the outer peripheral surface of the side plate portion 32 for fingers to hook onto. As a result, when attaching or detaching the cap 3 to or from the telescopic tube main body 1, the irregularities on the side plate portion 32 of the cap 3 prevent fingers from slipping, thereby improving the ease of holding the cap 3 and workability.

[0034] The cap 3 may be manufactured by casting the same metal material as the telescopic tube body. In this case, the surface texture of the casting of the cap 3 prevents fingers from slipping, improving the ease of holding the cap 3 and workability.

[0035] Next, a method of using the expandable tube 100 will be described.

[0036] First, a disassembly method for removing the cartridge 2 from the telescopic tube 100 will be described.

[0037] 1, after removing the telescopic pipe 100 containing the cartridge 2 by pulling it out from the stop valve 200, hold the telescopic pipe body 1 with one hand and the cap 3 with the other, and rotate the cap 3 around its axis. This releases the male thread portion 11c of the telescopic pipe body 1 from the female thread portion 32a of the cap 3, and the cap 3 can be removed from the telescopic pipe body 1.

[0038] Next, tilt the telescopic pipe body 1 so that the primary side opening end 11a is positioned downward, and remove the cartridge 2 housed in the telescopic pipe body 1 from the primary side opening end 11a of the large diameter pipe section 11 by sliding it along the inner surface of the large diameter pipe section 11.

[0039] Next, hold the telescopic pipe body 1 with one hand and the cap 3 with the other hand and rotate the cap 3 in the opposite direction around its axis. This causes the male thread portion 11c of the telescopic pipe body 1 to screw into the female thread portion 32a of the cap 3, and the cap 3 is attached to the telescopic pipe body 1.

[0040] By using the above method, when the cartridge 2 is removed from the telescopic pipe 100, the telescopic pipe 100 can be reconnected to the stop valve 200, making it possible to perform water flow tests by passing water through the secondary side, as well as maintenance work, and water can flow from the secondary side to the primary side in the telescopic pipe 100.

[0041] Next, an assembly method for attaching the cartridge 2 to the telescopic tube 100 will be described.

[0042] 1, remove the telescopic pipe 100 from which the cartridge 2 has been removed by pulling it out from the stop valve 200, then hold the empty telescopic pipe body 1 in one hand and the cap 3 in the other, and rotate the cap 3 around its axis. This releases the male thread portion 11c of the telescopic pipe body 1 from the female thread portion 32a of the cap 3, and the cap 3 can be removed from the telescopic pipe body 1.

[0043] Next, the telescopic pipe body 1 is tilted so that the primary side open end 11a is positioned at the top, and the cartridge 2 is inserted from the primary side open end 11a of the large diameter pipe section 11 by sliding it along the inner circumferential surface of the large diameter pipe section 11. At this time, the inner surface step 14 of the large diameter pipe section 11 functions as a stopper that restricts the movement of the cartridge 2 toward the small diameter pipe section 12.

[0044] Next, hold the telescopic pipe body 1 with one hand and the cap 3 with the other hand and rotate the cap 3 in the opposite direction around its axis. This causes the male thread portion 11c of the telescopic pipe body 1 to screw into the female thread portion 32a of the cap 3, and the cap 3 is attached to the telescopic pipe body 1.

[0045] By using the above method, when the cartridge 2 is attached to the telescopic pipe 100, the telescopic pipe 100 can be reconnected to the stop valve 200, and as shown in Figure 1, the telescopic pipe 100 can be used as a check valve, allowing water to flow from the primary side to the secondary side in the telescopic pipe 100.

[0046] After the cartridge 2 is housed inside the telescopic tube main body 1, the cartridge 2 can be fixed simply by attaching the cap 3, while the fixation of the cartridge 2 housed inside the telescopic tube main body 1 can be released simply by removing the cap 3 from the telescopic tube main body 1, so the cartridge 2 can be easily attached and detached manually without using tools.

[0047] Therefore, since no fixing jig (C-shaped retaining ring, etc.) is provided to secure the cartridge 2 to the telescopic pipe 100, there is no need to use tools to remove the fixing jig (C-shaped retaining ring, etc.) from the telescopic pipe when removing the cartridge 2 from the telescopic pipe 100, which saves time and effort. Furthermore, when a water flow test, maintenance work, etc. is completed and the cartridge 2 is returned to the telescopic pipe 100, there is no need to reattach the fixing jig (C-shaped retaining ring, etc.) to secure the cartridge 2 to the telescopic pipe 100, which saves time and effort. Furthermore, because the cap 2 can be attached and detached to the telescopic pipe body 1 multiple times, there is no risk of it not restoring to its original shape.

[0048] 7, the cap 3 may be provided with an O-ring 33 on the outer peripheral surface of the side plate portion 32. In this way, when the outlet pipe 205 of the stop valve 200 is connected to the cap 3 side of the telescopic pipe 100, the O-ring 33 can prevent damage to the telescopic pipe 100 and the outlet pipe 205, and can also improve the airtightness and liquidtightness between the telescopic pipe 100 and the outlet pipe 205.

[0049] In addition, the cap 3 is provided with O-rings 33 at least on the tip and base end sides of the outer peripheral surface of the side plate portion 32, so that when the stop valve 200 is connected to the cap 3 side of the telescopic tube 100, the O-rings 33 can prevent the axis of the telescopic tube 100 from shifting.

[0050] 8, the cap 3 may have a recess 34 formed on the inner peripheral edge of the through hole 31a, recessed in the radial direction. According to this, when attaching or detaching the cap 3 to or from the telescopic pipe body 1, fingers fit into the recess 34 of the through hole 31a of the cap 3, thereby improving ease of holding the cap 3 and workability. Note that the cap 3 may have a protrusion protruding in the radial direction formed on the inner peripheral edge of the through hole 31a.

[0051] <Second embodiment> Next, a second embodiment of an expandable pipe according to the present invention will be described with reference to Fig. 9. Note that only the configurations different from the above embodiment will be described below, and the same configurations will be denoted by the same reference numerals and will not be described again.

[0052] In this embodiment, when a water flow test or maintenance work is performed, an attachment 4 is attached to the cap 3 to disable the function of the cartridge 2 as a check valve.

[0053] The attachment 4 includes a disk-shaped base 41, a protruding portion 42 erected in the center of the base 41, and a flow passage 43 axially penetrating the protruding portion 42, and when attached to the cap 3, the base 41 fits along the outer surface of the top plate portion 31 of the cap 3, and the protruding portion 42 fits into the through-hole 31a of the cap 3. The protruding portion 42 presses the valve element 22 of the cartridge 2 in the axial direction from the primary side to the secondary side via the through-hole 31a, moving it to the open position, thereby disabling the function of the cartridge 2 as a check valve.

[0054] According to this, when performing a water flow test in which water flows from the secondary side or maintenance work, the function of the cartridge 2 as a check valve can be disabled simply by attaching the attachment 4 to the through hole 31a of the cap 3, so there is no need to take the trouble of disassembling the telescopic tube to remove the cartridge 2, further improving workability.

[0055] <Third embodiment> Next, a third embodiment of an expandable pipe according to the present invention will be described with reference to Fig. 10. Note that only the configurations different from the above-described embodiment will be described below, and the same configurations will be denoted by the same reference numerals and will not be described again.

[0056] In this embodiment, when a water flow test or maintenance work is performed, a second cap 5 is attached to the expandable pipe main body 1 to disable the function of the cartridge 2 as a check valve.

[0057] The second cap 5 comprises a top plate portion 51 having a through hole 51a penetrating in the thickness direction, a side plate portion 52 erected on the outer peripheral edge of the top plate portion 51, and a protrusion portion 53 erected on the inner peripheral edge of the through hole 51a of the top plate portion 51.

[0058] In addition, the second cap 5 has a female thread portion 52a formed on the inner surface of the side plate portion 52, and is removably attached to one open end 11a of the telescopic pipe body 1 by screwing it into the male thread portion 11c of the large diameter pipe portion 11.

[0059] In addition, when the second cap 5 is attached to one of the opening ends 11a of the telescopic pipe main body 1, the top plate portion 51 presses the valve seat 21 of the cartridge 2 to the secondary side, thereby fixing the cartridge 2 inside the telescopic pipe main body 1.

[0060] Furthermore, when the second cap 5 is attached to one of the open ends 11a of the telescopic pipe body 1, the protrusion 53 presses the valve body 22 of the cartridge 2 in the axial direction from the primary side toward the secondary side, moving it to the open position, thereby disabling the function of the cartridge 2 as a check valve.

[0061] According to this, when performing a water flow test in which water is passed through from the secondary side or maintenance work, the function of the cartridge 2 as a check valve can be disabled simply by replacing the cap 3 with the second cap 5, eliminating the need to disassemble the telescopic tube 100 and remove the cartridge 2, further improving workability.

[0062] In each of the above embodiments, the cartridge 2 has been described as having the function of a check valve, but this is not limited to this and may also have the function of another valve, such as a metered valve, or a strainer.

[0063] Furthermore, although the cap 3 is fitted to the outside of the telescopic pipe body 1 in the above embodiment, it may also be fitted to the inside of the telescopic pipe body 1. In this case, a male thread portion is formed on the outer peripheral surface of the side plate portion of the cap 3, and a female thread portion is formed on the inner peripheral surface of the primary side opening end 11a of the telescopic pipe body 1, and the male thread portion and the female thread portion are screwed together, thereby allowing the cap 3 to be detachably attached to the primary side opening end 11a of the telescopic pipe body 1.

[0064] Furthermore, the cap 3 is configured to be composed of the top plate portion 31 and the side plate portion 32, but may have other configurations as long as it is configured to at least directly or indirectly press and fix the cartridge 2.

[0065] Furthermore, although the attachment 4 has a base 41 and a protrusion 42, other configurations may be used as long as they are configured to disable the function of the cartridge 2 by at least pressing the valve body 22 in the axial direction.

[0066] Furthermore, the second cap 5 is configured to be composed of a top plate portion 51, a side plate portion 52, and a protrusion portion 53, but other configurations are also possible as long as they at least directly or indirectly press and fix the cartridge 2 and disable the function of the cartridge 2 by, for example, pressing the valve body 22 in the axial direction.

[0067] Furthermore, the above-mentioned top plate portions 31, 51 and side plate portions 32, 52 are not limited to so-called thin plate-like portions, but may also be thick block-like portions.

[0068] Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as the present invention or within an equivalent scope. [Explanation of symbols]

[0069] 100...Main telescopic tube 1... Telescopic pipe body 11...Large diameter pipe section 11a...Primary side open end (one open end) 11b...Internal space 11c…Male thread part 11d...Protrusion part 11e...O-ring 12...Small diameter pipe section 12a...Secondary side open end 12b...O-ring 12c...Cap nut 13...Outer step (step) 14...Inner step 2...Cartridge 21...Valve seat 22...Valve body 23...Spring 24...Cartridge case 25...O-ring 3...Cap 31...Top plate 31a...Through hole 32...Side plate part 32a...Female thread 32b...Proximal end 33...O-ring 34...recess 4...Attachment 41...Base 42...Protruding part 43... Distribution path 5...Second cap 51...Top plate 51a...Through hole 52...Side plate part 52a...Female thread 53...Protrusion 200...Stop valve 201...Bento box 202...Ball valve body 203…Operation lever 204...Inflow pipe 205...Outflow pipe 206...Cap nut

Claims

1. an expansion pipe body to be installed in a water supply facility; a cartridge housed inside the telescopic pipe body and having a function of a valve or a strainer; a cap detachably provided on one open end of the telescopic pipe body, The cap has a through hole penetrating in the thickness direction, and is used to press and fix the cartridge housed inside the telescopic tube body.

2. The telescopic pipe body has a male screw portion formed on the outer peripheral surface of one open end, The cap includes a top plate portion having a through hole penetrating in a thickness direction, and a side plate portion erected on the top plate portion, and a female screw portion is formed on an inner peripheral surface of the side plate portion, 2. The telescopic tube with cartridge according to claim 1, wherein the male threaded portion and the female threaded portion are threadedly engaged with each other, thereby making the cap detachable from the telescopic tube body.

3. The telescopic pipe body has a female screw portion formed on the inner peripheral surface of one open end, The cap includes a top plate portion having a through hole penetrating in a thickness direction, and a side plate portion erected on the top plate portion, and a male screw portion is formed on an outer peripheral surface of the side plate portion, 2. The telescopic tube with cartridge according to claim 1, wherein the male threaded portion and the female threaded portion are threadedly engaged with each other, thereby making the cap detachable from the telescopic tube body.

4. 2. The expandable tube with cartridge according to claim 1, wherein the cap has a radially protruding projection or a recess formed on the inner peripheral edge of the through hole.

5. 2. The telescopic tube with cartridge according to claim 1, wherein the cap is manufactured by casting the same metal material as the telescopic tube body.

6. 3. The expandable tube with cartridge according to claim 2, wherein the cap has an outer peripheral surface of the side plate portion formed with irregularities.

7. The telescopic pipe body has an O-ring on its outer circumferential surface, 3. The telescopic tube with cartridge according to claim 2, wherein the O-ring is sandwiched between the base end of the side plate portion of the cap and the telescopic tube body.

8. 8. The expandable tube with cartridge according to claim 7, wherein the cap has an O-ring provided on the outer peripheral surface of the side plate portion.

9. the cap is provided with a detachable attachment that fits into the through hole, 2. The telescopic tube with cartridge according to claim 1, wherein the attachment, when attached to the cap, presses the cartridge in the axial direction through the through hole, thereby disabling the function of the cartridge.

10. a second cap that is detachably provided on one open end of the telescopic pipe body and that presses and fixes the cartridge housed inside the telescopic pipe body; the second cap includes a top plate portion having a through hole penetrating in a thickness direction, and a protrusion portion erected on the top plate portion, 2. The telescopic tube with cartridge according to claim 1, wherein when attached to one open end of the telescopic tube body, the protrusion presses the cartridge in the axial direction, thereby disabling the function of the cartridge.

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