Pipe socket cover

Abstract

To provide a pipe socket cover that can prevent foreign matter from entering the socket of the pipe to be joined, and that can improve the workability of the joining process. [Solution] The socket cover 1 has a cover portion 2 that covers the socket opening W2b of the pipe to be joined W2, and a mounting portion 3 that supports the cover portion 2 and is attached to the outer circumference of the socket-side end of the pipe to be joined W2 so that the cover portion 2 is positioned in the axial direction of the socket opening W2b. The cover portion 2 has a frame portion 21 having an opening 21a that is sized to allow insertion of the insertion opening W1a of the pipe W1, and an opening / closing portion 22 provided on the frame portion 21 so that it can be switched between a closed state with the opening 21a closed and an open state with the opening 21a open.

Description

Technical Field

[0006] ,

[0001] The present invention relates to a receiving port cover for a pipe that is attached to a receiving port of a pipe to be joined into which an insertion port of a pipe having an insertion port and a receiving port is inserted.

Background Art

[0002] There is known a sealing member that seals between the outer peripheral surface of an insertion port of a pipe and the inner peripheral surface of a receiving port of a pipe to be joined to which the pipe is joined. As such a sealing member, for example, Patent Document 1 discloses a rubber ring provided with a heel portion that fits and engages in a locking groove formed on the peripheral surface of a rubber ring arrangement recess of the receiving port, and a valve portion that is compressed between the peripheral surface of the rubber ring arrangement recess and the outer peripheral surface of the insertion port to generate a sealing surface pressure.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] The object of the present invention is to provide a socket cover that can prevent foreign matter from entering the socket and can improve the workability of the joining process. [Means for solving the problem]

[0008] A pipe socket cover according to one embodiment of the present invention is a socket cover attached to the socket of a pipe to be joined into which the spigot of a pipe having a spigot and a socket is inserted. The pipe socket cover has a cover portion that covers the socket opening of the pipe to be joined, and a mounting portion that supports the cover portion and is attached to the outer circumference of the socket-side end of the pipe to be joined such that the cover portion is positioned in the axial direction of the socket opening. The cover portion has a frame portion having an opening of a size that allows the spigot of the pipe to be inserted, and an opening / closing portion provided on the frame portion that allows switching between a closed state and an open state (first configuration).

[0009] In the above configuration, the pipe socket cover has an opening and an opening / closing part for opening and closing the opening. The opening is sized to allow the insertion end of the pipe to be joined to the pipe to be joined to to be inserted. Therefore, the socket cover can be attached to the socket, and with the cover open, the insertion end can be inserted into the opening. Thus, the pipe and the pipe to be joined can be joined without removing the socket cover from the socket.

[0010] Therefore, it is possible to provide a pipe socket cover that can prevent foreign matter from entering the socket and improve the workability of the joining process.

[0011] In the first configuration described above, the cover portion has an operating portion for opening and closing the opening / closing portion, which can be operated from above when the receiving port cover is attached to the receiving port (second configuration).

[0012] This allows the cover portion of the socket cover to be switched to the open state by operating the operating part from above the groove, for a pipe to be joined that is placed in the groove with the socket cover attached to the socket. Therefore, a configuration can be realized in which the cover portion of the socket cover can be changed to the open state before inserting the pipe's insertion end into the socket of the pipe to be joined to which the socket cover is attached. Thus, it is possible to provide a pipe socket cover that can suppress the entry of foreign matter into the socket and improve the workability of the joining work.

[0013] In the first or second configuration described above, the cover portion is configured to be separable at at least one point when in the open state (third configuration).

[0014] This provides a configuration in which the socket cover can be removed radially after the pipe and the pipe to be joined are joined. Therefore, it is possible to provide a socket cover that allows the pipe and the pipe to be joined to be joined with the socket cover attached to the socket, and then the socket cover can be removed after joining.

[0015] In the first or second configuration described above, the mounting portion has a cylindrical portion extending axially on the outer circumference of the receiving end of the pipe to be joined, and an elastic member is arranged on the inner circumferential surface of the cylindrical portion that contacts the outer circumferential surface of the receiving end (fourth configuration).

[0016] This results in a configuration in which the mounting portion and the elastic member seal the gap between the mounting portion and the receiving end of the pipe to be joined. Therefore, it is possible to prevent foreign matter from entering the receiving end from between the mounting portion and the receiving end.

[0017] In the first or second configuration described above, the cover portion is supported by the mounting portion such that it is located away from the receiving opening. The mounting portion has a reduced diameter portion between the cover portion and the receiving opening that decreases in diameter towards the receiving opening (fifth configuration).

[0018] The reduced-diameter portion functions as a guide when inserting the insertion port of the pipe into the receiving port of the joined pipe. Therefore, the insertion port can be easily inserted into the receiving port by the reduced-diameter portion.

[0019] Also, the reduced-diameter portion is located at a position where it is not inserted into the receiving port of the joined pipe. That is, the reduced-diameter portion is not located between the insertion port of the pipe and the receiving port of the joined pipe in the radial direction in a state where the pipe and the joined pipe are joined. Therefore, it is possible to provide a pipe receiving-port cover that can improve the workability of the joining operation without interfering with the joining operation.

Effect of the Invention

[0020] The pipe receiving-port cover according to an embodiment of the present invention has an opening and an opening / closing portion for opening and closing the opening. Therefore, the pipe and the joined pipe can be joined without removing the receiving-port cover from the receiving port. Therefore, it is possible to provide a pipe receiving-port cover that can suppress the entry of foreign matter into the receiving port and improve the workability of the joining operation.

Brief Description of the Drawings

[0021] [Figure 1] FIG. 1 is a cross-sectional view showing an example of the schematic configuration of the receiving-port cover according to Embodiment 1. [Figure 2] FIG. 2 is a cross-sectional view showing an example of the schematic configuration of the receiving-port cover in an open state of the cover portion. [Figure 3] FIG. 3 is a diagram for explaining the joining of a pipe and a joined pipe in a state where the receiving-port cover is attached. [Figure 4] FIG. 4 is a diagram for explaining the joining of a pipe and a joined pipe in a state where the receiving-port cover is attached. [Figure 5] FIG. 5 is a diagram showing an example of the configuration of the opening / closing portion. [Figure 6] FIG. 6 is a diagram showing another example of the configuration of the opening / closing portion. [Figure 7] FIG. 7 is a side view showing the schematic configuration of an exemplary pipe joining device for joining a pipe and a joined pipe. [Figure 8]Figure 8 shows the pipe joining device attached to the pipe to be joined. [Figure 9] Figure 9 shows the state in which the pipe gripping part grips the pipe. [Figure 10] Figure 10 shows the state in which the suction end of the pipe is inserted into the socket of the pipe to be joined. [Figure 11] Figure 11 shows the pipe gripping part removed from the socket. [Figure 12] Figure 12 is a cross-sectional view showing an example of the schematic configuration of the socket cover according to Embodiment 2. [Figure 13] Figure 13 illustrates the connection between the pipe and the pipe to be joined with the socket cover attached. [Figure 14] Figure 14 is a schematic diagram showing the receiving cover according to Embodiment 3 in a divided state. [Figure 15] Figure 15 schematically shows how to remove the socket cover from the socket after joining the pipe and the pipe to be joined. [Modes for carrying out the invention]

[0022] The following describes each embodiment with reference to the drawings. In each drawing, the same parts are denoted by the same reference numerals, and the description of those parts will not be repeated. Note that the dimensions of the components in each drawing do not faithfully represent the dimensions of the actual components or the dimensional ratios of each component.

[0023] In the following description, the axial direction refers to the direction in which the axis L2 of the pipe W2 to be joined extends. The left-right direction refers to the horizontal direction that is also perpendicular to the axial direction. The horizontal direction includes not only the strictly horizontal direction but also the direction that intersects the vertical direction.

[0024] Furthermore, in the following description, "ring" means a shape that is generally continuous when viewed in the axial direction. That is, in the following description, "ring" includes not only shapes composed of curves, but also shapes composed of straight lines and corners.

[0025] Furthermore, in the following explanation, the expressions "fix," "connect," and "attach" (hereinafter referred to as "fixing, etc.") include not only cases where components are directly fixed to each other, but also cases where they are fixed to each other via other components. In other words, in the following explanation, the expressions "fixing, etc." include both direct and indirect fixing of components to each other.

[0026] (Embodiment 1) Figure 1 is a cross-sectional view showing an example of the schematic configuration of a socket cover 1 according to Embodiment 1 of the present invention. In Figure 1, the cover portion 2 is in a closed state. Figure 2 is a cross-sectional view showing an example of the schematic configuration of a socket cover 1 with the cover portion 2 in an open state. Figures 3 and 4 are diagrams illustrating the joining of pipe W1 and pipe to be joined W2 with the socket cover 1 attached.

[0027] The socket cover 1 is a socket cover for a pipe. The socket cover 1 is attached to the socket W2a of the pipe to be joined W2 into which the insertion port W1a of pipe W1 is inserted. The socket cover 1 prevents foreign matter such as sand and dust from entering the socket W2a of the pipe to be joined W2. Furthermore, by attaching the socket cover 1 of the present invention to the socket W2a, the workability of the pipe joining work in which pipe W1 and the pipe to be joined W2 can be improved, as will be described later.

[0028] Pipe W1 and the pipe to be connected W2 are, for example, water pipes. Pipe W1 and the pipe to be connected W2 may be pipes other than water pipes, such as sewer pipes, agricultural water pipes, or gas pipes. Pipe W1 and the pipe to be connected W2 may be ductile cast iron pipes, other metal pipes, or resin pipes. Pipe W1 and the pipe to be connected W2 are laid in a trench.

[0029] As shown in Figure 1, a sealing member S is attached to the inner circumferential surface of the socket W2a. The sealing member S is a rubber member that seals the space between the outer circumferential surface of the socket W1a of the pipe W1 and the inner circumferential surface of the socket W2a of the pipe to be joined. Note that the sealing member may be made of a material other than rubber, as long as it can seal the space between the outer circumferential surface of the socket W1a of the pipe W1 and the inner circumferential surface of the socket W2a of the pipe to be joined.

[0030] As shown in Figure 1, the receiving port cover 1 has a cover portion 2 and a mounting portion 3. In this embodiment, the receiving port cover 1 further has an elastic member 4.

[0031] The cover portion 2 covers the receiving opening W2b of the pipe to be joined W2. Specifically, the cover portion 2 has a frame portion 21, an opening / closing portion 22, and an operating portion 23.

[0032] The frame portion 21 is annular when viewed in the axial direction. That is, the frame portion 21 has an opening 21a that opens in the axial direction. The frame portion 21 is made of, for example, a resin material. The frame portion 21 may be integrally molded with the mounting portion 3, which will be described later.

[0033] The opening 21a is sized to allow insertion of the Socket W1a of the pipe W1. The axial shape of the opening 21a may be circular, rectangular, or polygonal, as long as it allows insertion of the Socket W1a of the pipe W1 into the opening 21a.

[0034] The opening 21a of the frame portion 21 is opened and closed by the opening / closing portion 22. That is, the cover portion 2 can be switched between a closed state with the opening 21a closed, as shown in Figure 1, and an open state with the opening 21a open, as shown in Figure 2. When the cover portion 2 is in the closed state, the receiving opening W2b of the receiving port W2a is covered by the opening / closing portion 22. On the other hand, when the opening / closing portion 22 is in the open state, the receiving opening W2b of the receiving port W2a is exposed.

[0035] The configuration of the opening / closing section 22 is not particularly limited, as long as it can be switched between a closed state with the opening 21a closed and an open state with the opening 21a open. For example, the opening / closing section 22 can be realized by an aperture blade structure, a slide gate structure, a slide-in structure, or a folding structure.

[0036] As described above, since the cover portion 2 has an opening / closing portion 22, as shown in Figures 3 and 4, the receiving end cover 1 can be attached to the receiving end W2a, and with the cover portion 2 in the open state, the insertion end W1a of the pipe W1 can be inserted into the opening 21a. Therefore, the pipe W1 and the pipe to be joined W2 can be joined without removing the receiving end cover 1 from the receiving end W2a.

[0037] The operating section 23 is the part that opens and closes the opening / closing section 22. The operating section 23 is positioned so that it can be operated from above when the receiving end cover 1 is attached to the receiving end W2a. This allows the operating section 23 to be operated from above the groove with respect to the pipe to be joined W2 which is laid in the groove with the receiving end cover 1 attached to the receiving end W2a. Therefore, the cover section 2 that covers the receiving end W2a of the pipe to be joined W2 which is laid in the groove can be switched to the open state from above the groove.

[0038] Figure 5 shows an example of the configuration of the opening / closing section. In the example shown in Figure 5, the opening / closing section 22 is realized by an aperture blade structure. The opening / closing section 22 has a plurality of blades 22a and an opening / closing mechanism (not shown). By moving the operating section 23 in the circumferential direction, the plurality of blades 22a move radially relative to the frame section 21. As a result, the cover section 2 switches between a closed state, as shown in the top figure of Figure 5, and an open state, as shown in the bottom figure. Note that the aperture blade structure is a known structure, so a detailed explanation is omitted.

[0039] Figure 6 shows another example of the configuration of the opening / closing section. In the example shown in Figure 6, the opening / closing section 222 is realized by a slide gate structure. In the example shown in Figure 6, the cover section 202 has a frame section 221, an opening / closing section 222, and an operating section 223. The frame section 221 has an opening 221a that is large enough to insert the insertion opening W1a of the pipe W1. The opening / closing section 222 has a plate-shaped member. By moving the operating section 223 radially, the plate-shaped member moves radially relative to the frame section 221. As a result, the cover section 202 switches between a closed state, as shown in the leftmost figure in Figure 6, and an open state, as shown in the rightmost figure.

[0040] As shown in Figures 1 and 2, the mounting portion 3 supports the cover portion 2 and is attached to the outer circumference of the receiving end of the pipe W2 to be joined. The mounting portion 3 positions the cover portion 2 in the axial direction of the receiving opening W2b. The mounting portion 3 is made of, for example, a resin material.

[0041] The mounting portion 3 has a plate portion 31 that contacts the end face of the pipe to be joined W2 on the receiving end W2a side in the axial direction, and a cylindrical portion 32 that extends axially radially outward from the outer circumferential surface of the end on the receiving end W side.

[0042] The plate portion 31 is annular and plate-shaped. The outer circumference of the plate portion 31 is located radially outward from the outer circumference of the receiving end of the pipe W2 to be joined, when viewed in the axial direction. The inner circumference of the plate portion 31 does not protrude into the receiving end W2a. The other axial side of the plate portion 31 is in axial contact with the receiving end of the pipe W2 to be joined W2.

[0043] The cylindrical portion 32 is cylindrical and extends from the outer circumference of the plate portion 31 in the other axial direction. Therefore, the receiving end of the pipe to be joined W2 can be inserted radially inward into the cylindrical portion 32. This positions the cover portion 2 in the axial direction of the receiving opening W2b.

[0044] In this embodiment, an elastic member 4 is located on the inner circumferential surface of the cylindrical portion 32. The elastic member 4 is made of an elastically deformable material. The material is, for example, rubber or resin. Therefore, when the receiving opening cover 1 is attached to the receiving opening W2a, the elastic member 4 is located between the cylindrical portion 32 of the mounting portion 3 and the outer circumferential surface of the receiving opening side end. The elastic member 4 is elastically deformable. Therefore, the receiving opening cover 1 can be attached to the receiving opening W2a easily and more reliably.

[0045] In other words, in this embodiment, the mounting portion 3 has a cylindrical portion that extends axially on the outer circumference of the receiving end of the pipe W2 to be joined, and an elastic member 4 is arranged on the inner circumferential surface of the cylindrical portion that contacts the outer circumferential surface of the receiving end.

[0046] This results in a configuration in which the mounting portion 3 and the elastic member 4 seal the gap between the mounting portion 3 and the receiving end of the pipe W2 to be joined. Therefore, it is possible to prevent foreign matter from entering the receiving end W2a from between the mounting portion 3 and the receiving end.

[0047] (Pipe joining work) Next, referring to Figures 7 to 11, the joining process between pipe W1 and pipe to be joined W2 when the socket cover 1 is attached to the socket W2a will be described. Figure 7 is a side view showing the schematic configuration of an exemplary pipe joining device 100 for joining pipe W1 and pipe to be joined W2. Figure 8 shows the state in which the pipe joining device 100 is attached to pipe to be joined W2. Figure 9 shows the state in which the pipe gripping part 102 grips pipe W1. Figure 10 shows the state in which the insertion end W1a of pipe W1 is inserted into the socket W2a of pipe to be joined W2. Figure 11 shows the state in which the pipe gripping part 102 is removed from the socket W2a.

[0048] First, an exemplary pipe joining device 100 will be briefly described using Figure 7. The pipe joining device 100 is a device for joining pipe W1 and pipe W2 by inserting the insertion end W1a of pipe W1 into the receiving end W2a of pipe W2. The pipe joining device 100 is used in a groove where pipe W1 and pipe W2 are laid. The pipe joining device 100 is sized to be installed in the groove. The pipe joining device 100 is lowered into the groove, for example, by a work machine.

[0049] The pipe joining device 100 adjusts the position of the insertion opening W1a of pipe W1 relative to the axis L2 of the receiving opening W2a of pipe W2, and then inserts the insertion opening W1a of pipe W1 into the receiving opening W2a of pipe W2. Specifically, the pipe joining device 100 includes a pipe attachment part 101 attached to pipe W2, a pipe gripping part 102 for gripping pipe W1, and a moving mechanism 103 for moving the pipe gripping part 102 in the axial direction.

[0050] The pipe attachment portion 101 is attached to the pipe W2. The exemplary pipe joining device 100 is installed in a groove by attaching the pipe attachment portion 101 to the pipe W2.

[0051] The pipe gripping portion 102 has a pair of plate-shaped gripping members that extend in the axial direction. The pipe gripping portion 102 grips the insertion end W1a of the pipe W1 by clamping it from both the left and right sides. The pipe W1 has an insertion end projection W1b at the insertion end W1a side, the outer surface of which protrudes radially outward. The pipe gripping portion 102 grips the outer surface of the pipe W1, and its tip is configured to be able to contact the insertion end projection W1b in the axial direction.

[0052] The moving mechanism 103 is supported by the pipe attachment portion 101 and moves the pipe gripping portion 102 in the axial direction. Specifically, the moving mechanism 103 has an extendable portion 103a that is driven to extend and retract in the axial direction, and a drive portion 103b that drives the extendable portion 103a. The pipe gripping portion 102 is connected to the tip of the extendable portion 103a.

[0053] With the pipe gripping part 102 gripping the pipe W1, the telescopic part 103a is driven by the drive part 103b, causing the pipe gripping part 102 to approach the pipe to be joined W2, and the insertion opening W1a of the pipe W1 to be inserted into the receiving opening W2a of the pipe to be joined. As a result, the pipe W1 and the pipe to be joined W2 are joined.

[0054] Next, using Figures 8 to 11, the joining process between the pipe to be joined W2, which has a socket cover 1 attached to its socket W2a, and the pipe W1 will be explained using the pipe joining device 100 configured as described above.

[0055] First, the pipe joining device 100 is attached to the pipe to be joined W2, which is positioned in the groove. At this time, the receiving end W2a is fitted with the receiving end cover 1, which has its cover portion 2 in a closed state. Therefore, when installing the pipe joining device 100 in the groove, foreign matter is prevented from entering the receiving end W2a.

[0056] Next, as shown in Figure 8, the cover portion 2 of the receiving port cover 1 is opened. This exposes the receiving port opening W2b. In this state, the drive unit 103b is driven to insert the tip of the pipe gripping portion 102 into the receiving port W2a of the cover portion 2.

[0057] Subsequently, pipe W1 is lowered into the groove. At this time, since the pipe gripping part 102 is housed in the receiving opening W2a, pipe W1 can be lowered close to the pipe W2 to be joined.

[0058] Next, as shown in Figure 9, the pipe gripping part 102 is moved to a position for gripping the pipe W1, and the pipe W1 is gripped by the pipe gripping part 102.

[0059] Next, as shown in Figure 10, the drive unit 103b is driven to move the pipe gripping unit 102 toward the pipe to be joined W2. As described above, the opening 21a of the cover unit 2 is sized to allow insertion of the insertion port W1a of the pipe W1. Therefore, even with the receiving port cover 1 attached to the receiving port W2a, the insertion port W1a can be inserted into the receiving port W2a. In other words, the pipe W1 and the pipe to be joined W2 can be joined without removing the receiving port cover 1 from the receiving port W2a.

[0060] Then, as shown in Figure 11, the pipe gripping portion 102 is removed from the socket W2a.

[0061] Through the above process, pipe W1 can be joined to pipe W2, which has a socket cover 1 attached to the socket W2a.

[0062] In other words, the socket cover 1 according to this embodiment is a socket cover 1 that is attached to the socket W2a of a pipe to be joined W2 into which the socket W1a of a pipe W1 having a socket W1a and a socket W2a is inserted. The socket cover 1 has a cover portion 2 that covers the socket opening W2b of the pipe to be joined W2, and a mounting portion 3 that supports the cover portion 2 and is attached to the outer circumference of the socket-side end of the pipe to be joined W2 so that the cover portion 2 is positioned in the axial direction of the socket opening W2b. The cover portion 2 has a frame portion 21 having an opening 21a of a size that allows the socket W1a of the pipe W1 to be inserted, and an opening / closing portion 22 provided on the frame portion 21 so as to be switchable between a closed state with the opening 21a closed and an open state with the opening 21a open.

[0063] In the above configuration, the socket cover 1 has an opening 21a and an opening / closing part 22 for opening and closing the opening 21a. The opening 21a is sized to allow insertion of the insertion opening W1a of the pipe W1 to be joined to the pipe W2. Therefore, with the socket cover 1 attached to the socket W2a and the cover part 2 in the open position, the insertion opening W1a can be inserted into the opening 21a. Thus, the pipe W1 and the pipe W2 to be joined can be joined without removing the socket cover 1 from the socket W2a.

[0064] Therefore, it is possible to provide a socket cover 1 that can prevent foreign matter from entering the socket W2a and improve the workability of the joining process.

[0065] Furthermore, in this embodiment, the cover portion 2 has an operating portion 23 for opening and closing the opening / closing portion 22, which is located in a position that allows it to be operated from above when the receiving port cover 1 is attached to the receiving port W2a.

[0066] This allows the cover portion 2 of the socket cover 1 to be switched to the open state by operating the operating part 23 from above the groove on the pipe W2 to be joined, with the socket cover 1 attached to the socket W2a and the pipe W2 placed in the groove. Therefore, a configuration can be realized in which the cover portion 2 of the socket cover 1 can be changed to the open state before inserting the insertion end W1a of the pipe W1 into the socket W2a of the pipe W2 to be joined, to which the socket cover 1 is attached. Thus, a socket cover 1 can be provided that can suppress the entry of foreign matter into the socket W2a and improve the workability of the joining work.

[0067] (Embodiment 2) Next, with reference to Figures 12 and 13, the socket cover 301 according to Embodiment 2 of the present invention will be described. In this embodiment, the configuration of the mounting portion 303 of the socket cover 301 is different from the configuration of the mounting portion 3 of Embodiment 1. In the following, the same configuration as Embodiment 1 will be omitted from the description, and only the configuration that differs from Embodiment 1 will be described.

[0068] Figure 12 is a cross-sectional view showing an example of the schematic configuration of the socket cover 301 according to Embodiment 2. Figure 13 is a diagram illustrating the joining of the pipe W1 and the pipe to be joined W2 with the socket cover 301 attached. As shown in Figure 12, the socket cover 301 has a cover portion 2, a mounting portion 303, and an elastic member 4. The mounting portion 303 has a plate portion 331, a cylindrical portion 332, and a reduced diameter portion 333.

[0069] The plate portion 331 is annular and plate-shaped. The outer circumference of the plate portion 331 is located radially outward from the outer circumference of the receiving end of the pipe W2 to be joined, when viewed in the axial direction. The inner circumference of the plate portion 331 does not protrude into the receiving end W2a. The other axial side of the plate portion 331 is in axial contact with the receiving end of the pipe W2 to be joined W2.

[0070] In this embodiment, the cylindrical portion 332 extends from the outer circumference of the plate portion 331 in one axial direction and the other axial direction. The cylindrical portion 332 supports the cover portion 2 at its tip on one axial side. Therefore, in this embodiment, the cover portion 2 is positioned away from the receiving opening W2b.

[0071] The reduced diameter portion 333 is connected to the inner circumference of the plate portion 331 and to one axial side of the cylindrical portion 332. That is, the reduced diameter portion 333 is a frustoconical shape that decreases in diameter towards the receiving opening W2b between the cover portion 2 and the receiving opening W2b.

[0072] As shown in Figure 13, the frustoconical diameter-reducing portion 333 can guide the pipe W1 so that its axis L1 approaches axis L2 when the axis L1 of the insertion port W1a of the pipe W1 is misaligned with the axis L2 of the receiving port W2a of the pipe W2. In other words, the diameter-reducing portion 333 functions as a guide when inserting the insertion port W1a of the pipe W1 into the receiving port W2a of the pipe W2. Therefore, by attaching the receiving port cover 301 to the receiving port W2a of the pipe W2, the insertion port W1a can be easily inserted into the receiving port W2a.

[0073] Furthermore, the diameter-reducing portion 333 is positioned so that it is not inserted into the receiving end W2a of the pipe to be joined W2. In other words, when pipe W1 and the pipe to be joined W2 are joined, the diameter-reducing portion 333 is not located radially between the insertion end W1a of pipe W1 and the receiving end W2a of the pipe to be joined W2. Thus, a receiving end cover 301 can be provided that does not hinder the joining process and improves the workability of the joining process.

[0074] (Embodiment 3) Next, with reference to Figures 14 and 15, the socket cover 401 according to Embodiment 3 of the present invention will be described. In this embodiment, the socket cover 401 is configured to be separable in the open state. Figure 14 is a schematic diagram showing the socket cover 401 according to Embodiment 3 in a separable state. In Figure 14, the cover portion 402 is in the open state. Figure 15 is a schematic diagram showing the removal of the socket cover 401 from the socket W2a after joining the pipe W1 and the pipe to be joined W2. Figures 14 and 15 show a simplified representation of the configuration of the socket cover 401.

[0075] As shown in Figure 14, the socket cover 401 has a plurality of socket cover divisions 401a and 401b. The plurality of socket cover divisions 401a and 401b are arranged in the circumferential direction. The socket cover divisions 401a and 401b are detachably connected at their circumferential ends. With the socket cover divisions 401a and 401b connected, the socket cover 401 has the same configuration as the socket cover 1 of Embodiment 1. That is, the socket cover 401 has a cover portion 402 having a plurality of division cover portions arranged in the circumferential direction, a mounting portion 403 having a plurality of division mounting portions arranged in the circumferential direction, and an elastic member having a plurality of division elastic resin portions arranged in the circumferential direction.

[0076] This configuration allows the socket cover 401 to be removed radially from the socket W2a of the pipe to be joined W2. Therefore, as shown in Figure 15, a configuration is provided in which the socket cover 401 can be removed radially after the pipe W1 and the pipe to be joined W2 have been joined.

[0077] Figure 14 shows an example of the configuration of a socket cover 401 having multiple socket cover divisions. The socket cover may be divided into three or more parts. If the socket cover is made of a highly flexible material, it is sufficient that it be separable at least one location, and it does not need to be divided into multiple parts. In a socket cover made of a highly flexible material, the gap at one location separated in the circumferential direction can be widened. This allows the socket cover to be removed radially from the socket W2a of the pipe to be joined W2.

[0078] Furthermore, if the opening and closing mechanism is implemented by a slide gate structure, a plate-shaped member that switches the cover between the open and closed states may be configured to be removable from the frame, and the mounting section and the frame may be configured to be separable. Even with such a configuration, it is possible to provide a system in which the receiving cover can be removed radially after joining the pipe W1 and the pipe to be joined W2.

[0079] In other words, the receiving cover 401 according to this embodiment is configured to be separable at at least one location when the cover portion 402 is in the open state.

[0080] This provides a configuration in which the socket cover 401 can be removed radially after joining pipe W1 and pipe W2. Therefore, it is possible to provide a socket cover 401 configuration in which pipe W1 and pipe W2 can be joined with the socket cover 401 attached to the socket W2a, and the socket cover 401 can be removed after joining.

[0081] Therefore, it is possible to provide a socket cover 401 that can prevent foreign matter from entering the socket W2a and can improve the workability of the joining process.

[0082] (Other embodiments) Although embodiments of the present invention have been described above, the embodiments described above are merely examples for carrying out the present invention. Therefore, the invention is not limited to the embodiments described above, and it is possible to carry out the invention by appropriately modifying the embodiments described above without departing from the spirit of the invention.

[0083] In each of the above embodiments, the receiving cover 1,301,401 has an elastic member 4. However, the receiving cover does not have to have an elastic member.

[0084] In each of the above embodiments, the cover portions 2, 202, 302, and 402 have operating portions 23 and 223. However, the cover portions do not need to have operating portions if they are configured to allow switching between an open state and a closed state. For example, the cover portion may be configured to be locked in the closed state and to switch to the open state when the lock is released. For example, the cover portion may be configured to switch to the open state when a pipe jointing device approaches.

[0085] In each of the above embodiments, the plate portions 31 and 331 of the mounting portions 3,303 and 403 are annular. However, the plate portions do not have to be annular. The plate portions may be composed of a plurality of plate-shaped members that extend radially inward from the cylindrical portion and are spaced apart in the circumferential direction.

[0086] In the above embodiment 2, the reduced diameter portion 333 is a frustoconical shape that decreases in diameter as it approaches the receiving opening W2b. However, the reduced diameter portion does not have to be a frustoconical shape. The reduced diameter portion may be composed of a plurality of plate-shaped members that extend in a direction inclined with respect to the axial direction, so as they are located radially inward from one axial side of the cylindrical portion toward the receiving opening.

[0087] In each of the above embodiments, the joining process between pipe W1 and pipe to be joined W2 when socket covers 1,301,401 are attached to the socket W2a was described using an exemplary pipe joining device 100. However, the joining process may be performed using a pipe joining device with a different configuration. Also, the socket cover may be attached to the socket of the pipe to be joined that is not joined to a pipe. [Industrial applicability]

[0088] The present invention can be used for a socket cover that is attached to the socket of a pipe to be joined into which the socket of a pipe having a socket and a socket is inserted. [Explanation of Symbols]

[0089] 1, 301, 401 Receptacle Cover 2, 202, 302, 402 Cover section 3, 303, 403 Mounting section 4 Elastic members 21, 221 Frame section 21a, 221a opening 22, 222 Opening / Closing Section 22a blade 23, 223 Operation section 31, 331 plate part 32, 332 Cylindrical part 100 Pipe joining equipment 101 Connection part for pipe to be joined 102 Tube grip part 103 Moving mechanism 103a Telescopic part 103b Drive unit 333 Reduced diameter part 401a Receptacle cover split section W1 tube W1a Socket W1b Insertion port protrusion W2 Joined pipe W2a socket W2b socket opening L1, L2 axis

Claims

1. A pipe socket cover that is attached to the socket of a pipe to be joined into which the socket of a pipe having a socket and a socket is inserted, A cover portion that covers the receiving opening of the pipe to be joined, A mounting portion that supports the cover portion and is attached to the outer circumference of the receiving end of the pipe to be joined such that the cover portion is positioned in the axial direction of the receiving opening, It has, The aforementioned cover portion is A frame portion having an opening of a size that allows the insertion end of the aforementioned pipe to be inserted, The frame portion is provided with an opening / closing mechanism that allows the opening to be switched between a closed state and an open state. Having, Pipe socket cover.

2. In the pipe socket cover according to claim 1, The cover portion has an operating portion for opening and closing the opening / closing portion, in a position that allows it to be operated from above when the receiving opening cover is attached to the receiving opening. Pipe socket cover.

3. In the pipe socket cover according to claim 1 or claim 2, The cover portion is configured to be separable at least at one point when in the open state. Pipe socket cover.

4. In the pipe socket cover according to claim 1 or claim 2, The mounting portion has a cylindrical portion extending axially on the outer circumference of the receiving end of the pipe to be joined, and an elastic member is arranged on the inner circumferential surface of the cylindrical portion that contacts the outer circumferential surface of the receiving end. Pipe socket cover.

5. In the pipe socket cover according to claim 1 or claim 2, The cover portion is supported by the mounting portion so as to be located away from the receiving opening. The mounting portion has a reduced diameter portion between the cover portion and the receiving opening, which decreases in diameter as it approaches the receiving opening. Pipe socket cover.

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