Anti-slip structure and anti-slip tool used in the anti-slip structure

Abstract

To properly maintain a connection state of an inside cover and an outside cover by not only preventing a relative detachment of the inside cover and the outside cover but also maintaining the inside cover in a proper state.SOLUTION: A retention structure is for preventing a relative detachment of an inside cover 2 for piping and an outside cover 3 for piping externally fitted and connected to an end part of the inside cover 2. The retention structure comprises a retention tool 5 that is attachable to the end part of the inside cover 2, is locked to an inner surface part of the outside cover 3 with the retention tool attached to the inside cover 2, and exerts a retention action of preventing a relative detachment of the inside cover 2 and the outside cover 3. The inside cover 2 is formed by combination of a plurality of split bodies. The retention tool 5 comprises an assembling state maintenance action part, which exerts an assembling state maintenance action of maintaining the plurality of split bodies in an assembled state with respect to the inside cover 2 with the assembling state maintenance action part assembled to the inside cover 2.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a retaining structure for preventing an inner cover for piping and an outer cover for piping from coming off relative to each other, and to a retaining tool used in the retaining structure. [Background technology]

[0002] When installing piping covers along a piping route, for example, at bent route sections where the piping route is bent, branching points, merging points, etc., an inner cover and an outer cover with a larger diameter than the inner cover are provided, and the inner cover and outer cover are arranged continuously along the piping route (see, for example, Patent Document 1). At the connection points between the inner cover and the outer cover, the outer cover is externally fitted onto the end of the inner cover, ensuring a certain amount of insertion allowance for inserting the inner cover into the outer cover, and the inner cover and outer cover are arranged in a double layer.

[0003] When an inner cover and an outer cover are disposed in a double configuration, if the inner cover or the outer cover moves in the longitudinal direction, the insertion margin disappears at the connection point between the inner cover and the outer cover, and the inner cover and the outer cover may come off relative to each other. Therefore, Patent Document 1 employs a retaining structure to prevent the inner cover for piping and the outer cover for piping from coming off relative to each other.

[0004] The retaining structure described in Patent Document 1 uses a retainer that can be attached to the end of the inner cover and that engages with the inner surface of the outer cover when attached to the inner cover.

[0005] The inner surface of the outer cover is provided with a stopper portion that protrudes inward, and the retainer is provided with an abutment portion that can abut against the stopper portion. When the retainer is attached to the inner cover, even if the inner cover or outer cover moves in its longitudinal direction, the abutment portion of the retainer abuts against the stopper portion, thereby engaging with the inner surface of the outer cover and preventing the inner and outer covers from coming off relative to each other. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-112079 Summary of the Invention [Problem to be solved by the invention]

[0007] The retaining structure described in Patent Document 1 uses a retaining device, but this retaining device only has the function of preventing the inner cover and outer cover from coming off relative to each other.

[0008] However, in order to properly maintain the connection between the inner cover and the outer cover, it is necessary not only to prevent the inner cover and the outer cover from coming loose relative to each other, but also to maintain the inner cover and the outer cover in a proper state. For example, since the inner cover has a divided structure in which multiple divided bodies are combined and connected, if the divided bodies become misaligned or the connection between the divided bodies comes loose, the state in which the outer cover fits the inner cover to the outside and connects the inner cover to the outer cover will be lost, and it may not be possible to properly maintain the connection between the inner cover and the outer cover.

[0009] In view of this situation, the main object of the present invention is to provide a retaining structure that not only prevents the inner cover and outer cover from coming loose relative to each other, but also maintains the inner cover in an appropriate state and properly maintains the connection between the inner cover and outer cover, and a retaining device to be used in the retaining structure. [Means for solving the problem]

[0010] A first characteristic configuration of the present invention is a retaining structure for preventing relative removal of an inner cover for piping and an outer cover for piping that is externally fitted and connected to an end of the inner cover, comprising: A retainer is provided which is attachable to an end of the inner cover and which, when attached to the inner cover, engages with the inner surface of the outer cover to prevent the inner cover and the outer cover from coming off relative to each other, The inner cover is formed by combining a plurality of divided bodies, The feature of the anti-slip device is that it is provided with an assembly state maintaining portion that, when attached to the inner cover, exerts an assembly state maintaining effect to maintain the assembled state in which the multiple divided bodies are combined with the inner cover.

[0011] According to this configuration, when the stopper is attached to the inner cover, it engages with the inner surface of the outer cover to prevent it from coming off relative to the inner cover. Furthermore, since the stopper is provided with an assembly state maintaining portion, the assembly state maintaining portion maintains the assembled state of the inner cover, thereby maintaining the assembled state of the multiple segments in the inner cover, and maintaining the inner cover in an appropriate state. Therefore, simply attaching the stopper to the inner cover not only prevents the inner cover and outer cover from coming off relative to each other while simplifying the configuration, but also maintains the inner cover in an appropriate state, thereby maintaining the connection between the inner cover and outer cover in an appropriate state.

[0012] The second characteristic configuration of the present invention is that the assembly state maintaining action part has a plurality of claw portions that can be freely engaged with a plurality of divided bodies, and is provided as a slippage prevention action part that exerts a slippage prevention action by engaging the plurality of claw portions with the plurality of divided bodies to prevent the divided bodies from slipping.

[0013] According to this configuration, the anti-slip portion exerts an anti-slip effect by causing multiple claw portions to bite into multiple divided bodies to prevent the divided bodies from shifting, thereby preventing the divided bodies from shifting between the multiple divided bodies and maintaining the inner cover in an appropriate state.

[0014] The third characteristic configuration of the present invention is that the slip prevention portion is provided with a clamping body that clamps the inner and outer sides of the divided body, and the claw portion is arranged on the clamping body.

[0015] According to this configuration, the slippage prevention portion can have the claw portion bite into the divided body while the clamping body clamps the inner and outer sides of the divided body, thereby properly preventing the divided body from moving and properly exerting the slippage prevention function.

[0016] A fourth characteristic configuration of the present invention is that each of the plurality of divided bodies is provided with a fitting portion that can be freely fitted with a fitting portion of another divided body, The inner cover is assembled by fitting the fitting portions of the plurality of divided bodies together, The assembly state maintaining action portion has a surrounding portion that surrounds the periphery of the mated mating portions, and is provided as an anti-disengagement action portion that exerts an anti-disengagement action to prevent the mating portions surrounded by the surrounding portion from disengaging from each other.

[0017] According to this configuration, the anti-disengagement portion has an anti-disengagement effect that prevents the engaged engaging portions from disengaging by surrounding the engaged engaging portions with the surrounding portion, thereby preventing the engaged portions from disengaging and the divided bodies from becoming separated, and maintaining the inner cover in an appropriate state.

[0018] A fifth characteristic feature of the present invention is that the disengagement prevention portion is provided with a restricting wall portion that restricts the engaged engaging portions from moving in the disengagement direction.

[0019] If some external force or the like acts on the mated mating portions and causes the mating portions to move in the disengagement direction, the mating portions will become disengaged. Therefore, with this configuration, the disengagement prevention action portion simply includes a restricting wall portion, and even if some external force or the like acts, the restricting wall portion restricts the movement of the mating portions in the disengagement direction, thereby simplifying the configuration and appropriately preventing the mating portions from disengaging.

[0020] A sixth characteristic configuration of the present invention is a retainer used in a retaining structure for preventing relative removal of an inner cover for piping and an outer cover for piping that is externally fitted and connected to an end of the inner cover, the retainer comprising: an attachment portion that can be attached to an end portion of the inner cover; a retaining portion that, when attached to the inner cover, engages with an inner surface of the outer cover to prevent the inner cover and the outer cover from coming off relative to each other; The present invention is characterized in that an assembled state maintaining portion is provided which, when attached to the inner cover, exerts an assembled state maintaining effect by maintaining the assembled state in which the plurality of divided bodies are combined with the inner cover.

[0021] According to this configuration, the stopper can be attached to the end of the inner cover at the attachment portion, and when attached to the inner cover, the stopper portion not only exerts a stopper effect that prevents the inner cover and the outer cover from coming off relative to each other, but also exerts an assembled state maintaining effect that maintains the multiple segments in an assembled state at the assembled state maintaining portion. Thus, simply by attaching the stopper to the inner cover, it is possible to not only prevent the inner cover and the outer cover from coming off relative to each other, but also to maintain the inner cover in an appropriate state while simplifying the configuration. [Brief explanation of the drawings]

[0022] [Figure 1] External view showing the installation of the piping cover [Figure 2] A cross-sectional view showing the arrangement of piping and a piping cover. [Figure 3] (A) A perspective view of the front side of the retainer, (B) A view of the retainer from the back side [Figure 4] An exploded perspective view of the first outer cover, the fourth inner cover, the second outer cover, and the retaining member [Figure 5] (A) A diagram showing the process of attaching a retaining member to the fourth inner cover, (B) A diagram showing the fourth inner cover after the retaining member has been attached [Figure 6] (A) A cross-sectional view showing the first claw portion when the retaining device is attached to the fourth inner cover, and (B) A cross-sectional view showing the second claw portion when the retaining device is attached to the fourth inner cover. [Figure 7] FIG. 10A is a cross-sectional view showing the retaining portion with the retaining device attached to the fourth inner cover; FIG. 10B is a cross-sectional view showing the retaining portion exerting its retaining effect with the retaining device attached to the fourth inner cover; [Figure 8] (A) A diagram showing the mating state of the mating parts, and (B) A diagram showing the mating parts with retainers attached. DETAILED DESCRIPTION OF THE INVENTION

[0023] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a retaining structure according to the present invention and a retaining tool used in the retaining structure will be described with reference to the drawings. Figures 1 and 2 show the branching or merging points of piping 1 (shown by a dotted line in Figure 2), and Figure 1 shows an external view of the piping 1 with piping covers 2 and 3 attached, while Figure 2 shows a cross-sectional view of Figure 1.

[0024] 1 and 2, an inner cover 2 and an outer cover 3 having a larger diameter than the inner cover 2 are provided as covers for piping that cover the periphery of a pipe 1, and the inner cover 2 and the outer cover 3 are disposed continuously along the pipe path. At the connection point between the inner cover 2 and the outer cover 3, the end of the outer cover 3 is externally fitted onto the end of the inner cover 2, and the stop structure according to the present invention is applied to this connection point between the inner cover 2 and the outer cover 3.

[0025] The piping 1 includes a first pipe 11 and a second pipe 12 extending in the left-right direction in FIG. 2 , which are arranged parallel to each other with a gap in the up-down direction in FIG. 2 , with the second pipe 12 in contact with the first pipe 11 at its center. The gap between the first pipe 11 and the second pipe 12 in the up-down direction in FIG. 2 is narrow, and the first pipe 11 and the second pipe 12 are arranged as close as possible to each other. The end portion of the second pipe 12 is bent and connected to the center portion of the first pipe 11. Incidentally, although not shown, when arranging the first pipe 11 and the second pipe 12 as shown in FIG. 2 , for example, instead of directly connecting the first pipe 11 and the second pipe 12, a right-angled connecting pipe or the like can be connected between the first pipe 11 and the second pipe 12, so that the first pipe 11 and the second pipe 12 are connected with the connecting pipe or the like interposed therebetween.

[0026] As shown in Figures 1, 2 and 4, the inner cover 2 is, for example, a linear cylindrical cover. In this embodiment, four inner covers 2, namely, first to fourth inner covers 21 to 24, are provided. Incidentally, Figure 4 shows the fourth inner cover 24 as the inner cover 2.

[0027] 1 and 2, the first inner cover 21 and the second inner cover 22 cover the periphery of the first pipe 11, and the third inner cover 23 and the fourth inner cover 24 cover the periphery of the second pipe 12. In FIG. 2, the first inner cover 21 is disposed on the upper right side extending in the left-right direction to cover the right portion of the first pipe 11, and the second inner cover 22 is disposed on the upper left side extending in the left-right direction to cover the left portion of the first pipe 11. The third inner cover 23 is disposed on the lower right side extending in the left-right direction to cover the straight portion of the second pipe 12, and the fourth inner cover 24 is disposed on the upper right side extending in the up-down direction to cover the bent portion of the second pipe 12.

[0028] 1 and 2, the outer cover 3 is used to connect the inner covers 2 to each other and is configured as a tubular cover that can connect the inner covers 2 in multiple directions. In this embodiment, the outer cover 3 includes a first outer cover 31 that connects the first inner cover 21, the second inner cover 22, and the fourth inner cover 24, and a second outer cover 32 that connects the third inner cover 23 and the fourth inner cover 24.

[0029] The first outer cover 31 is formed in a shape (for example, a T-shape) that allows connection to the inner cover 2 in three directions, namely, both left and right directions and the lower side in Figures 1 and 2, in order to connect the first inner cover 21, the second inner cover 22, and the fourth inner cover 24. The second outer cover 32 is formed in a shape (for example, an L-shape) that allows connection to the inner cover 2 in two directions, namely, the upper side and the right side in Figures 1 and 2, in order to connect the third inner cover 23 and the fourth inner cover 24, which are orthogonal to each other.

[0030] 1 and 2, the first pipe 11 is continuously covered by a first inner cover 21, a first outer cover 31, and a second inner cover 22. At the connection between the first inner cover 21 and the first outer cover 31, as shown in Fig. 2, one end of the first outer cover 31 is externally fitted onto the connection end of the first inner cover 21, ensuring a certain amount of insertion space for inserting the first inner cover 21 into the first outer cover 31, and the first inner cover 21 and the first outer cover 31 are arranged in a double layer, inner and outer. Similarly, at the connection between the second inner cover 22 and the first outer cover 31, the other end of the second outer cover 32 is externally fitted onto the connection end of the second inner cover 22.

[0031] 1 and 2, the second pipe 12 is continuously covered with the third inner cover 23, the second outer cover 32, the fourth inner cover 24, and the first outer cover 31. At the connection between the third inner cover 23 and the second outer cover 32, one end of the second outer cover 32 is externally fitted and connected to the connection end of the third inner cover 23, as shown in FIG.

[0032] The first outer cover 31 and the second outer cover 32 are connected in a butted state in the vertical direction in Figures 1 and 2, and as shown in Figure 2, a fourth inner cover 24 is disposed inside the butt-connected portion. As a result, even if a small gap occurs between the first outer cover 31 and the second outer cover 32 at the butt-connected portion of the first outer cover 31 and the second outer cover 32, the fourth inner cover 24 can prevent the piping 1 from being exposed. Because the fourth inner cover 24 is disposed at the butt-connected portion of the outer covers 3, its length is limited to a length that fits within the butt-connected portion of the outer covers 3, and the length of the fourth inner cover 24 is set shorter than the first to third inner covers 21 to 23.

[0033] As shown in Figure 2, at the connection points between the fourth inner cover 24 and the first outer cover 31, and the connection points between the fourth inner cover 24 and the second outer cover 32, the end of the outer cover 3 is externally fitted and connected to the end of the inner cover 2, similar to the connection points between the other inner covers 2 and outer covers 3.

[0034] 1 and 2, the retaining structure according to the present invention is a structure for preventing relative removal of the inner cover 2 and the outer cover 3 at the connection points between the inner cover 2 and the outer cover 3. For this reason, the retaining structure according to the present invention is applied to the connection points between the inner cover 2 and the outer cover 3, and in this embodiment, as shown in FIGS. 1 and 2, there are a total of five connection points between the inner cover 2 and the outer cover 3.

[0035] 1 and 2, the first is the upper right connection point where the first outer cover 31 is fitted onto the first inner cover 21, the second is the upper left connection point where the first outer cover 31 is fitted onto the second inner cover 22, and the third is the lower right connection point where the second outer cover 32 is fitted onto the third inner cover 23. The fourth and fifth points correspond to the butt-joint connection points between the first outer cover 31 and the second outer cover 32, and as shown in FIG. 2, within these points, there are an upper central connection point where the first outer cover 31 is fitted onto the fourth inner cover 24, and a lower central connection point where the second outer cover 32 is fitted onto the fourth inner cover 24.

[0036] The following describes the anti-slip structure of the present invention. However, since the structure is similar when applied to any of the connection points between the inner cover 2 and the outer cover 3, we will explain the structure applied to the butt connection point between the first outer cover 31 and the second outer cover 32.

[0037] At the butt-joint connection point between the first outer cover 31 and the second outer cover 32, as shown in Figures 1 and 2, the first outer cover 31 and the second outer cover 32 are butt-jointed, but as shown in Figure 2, the first outer cover 31 is externally fitted and connected to one side end (upper end in Figure 2) of the fourth inner cover 24 arranged inside, and the second outer cover 32 is externally fitted and connected to the other side end (lower end in Figure 2) of the fourth inner cover 24.

[0038] As shown in Fig. 4, both the first outer cover 31 and the second outer cover 32 are formed by combining a plurality of (e.g., two) divided outer covers 31a, 32a to form a single outer cover 3. In this embodiment, the cylindrical first outer cover 31 is formed by fitting together half semicircular divided first outer covers 31a and fastening them to fastener attachment portions 34 (see Figs. 1 and 2) with fasteners such as screws. Similarly, the cylindrical second outer cover 32 is formed by fitting together half semicircular divided second outer covers 32a and fastening them to fastener attachment portions 34 (see Figs. 1, 2, and 4).

[0039] As shown in Fig. 4, the inner surfaces of the first outer cover 31 and the second outer cover 32 are provided with inwardly protruding cover rattle prevention portions 33. These cover rattle prevention portions 33 come into contact with the outer surface of the inner cover 2 that is fitted into the first outer cover 31 or the second outer cover 32, thereby suppressing rattle of the inner cover 2. Furthermore, as shown in Figs. 2 and 3, the inner sides of the first outer cover 31 and the second outer cover 32 are provided with protruding fastener attachment portions 34 for attaching fasteners such as screws, and these fastener attachment portions 34 come into contact with the ends of the fitted inner cover 2, thereby regulating the insertion length of the inner cover 2.

[0040] As with the first outer cover 31 and the second outer cover 32, the fourth inner cover 24 is also configured by combining multiple (e.g., two) divided fourth inner covers 24a to form a single fourth inner cover 24, as shown in Fig. 4. In this embodiment, each of the two halves of the divided fourth inner cover 24a is formed in the same semicircular shape. Each of the two divided fourth inner covers 24a is provided with a fitting portion 4 at both ends in the circumferential direction, and the two divided fourth inner covers 24a are fitted and connected to each other by fitting and connecting the fitting portions 4 to form the cylindrical fourth inner cover 24.

[0041] As shown in Fig. 4 and Fig. 5(A), the fitting portion 4 is disposed over the entire length of the fourth inner cover 24. For example, as shown in Fig. 8(A), the divided fourth inner covers 24a are provided with fitting portions 4 of different shapes. Of the two divided fourth inner covers 24a, one divided fourth inner cover 24a (the divided fourth inner cover 24a on the right in Fig. 8(A)) is provided with a hook-shaped first fitting portion 41 with a curved tip, and the other divided fourth inner cover 24a (the divided fourth inner cover 24a on the left in Fig. 8(A)) is provided with an L-shaped second fitting portion 42 that fits into the first fitting portion 41. The shape of the fitting portion 4 can be changed as appropriate, and various shapes are applicable as long as they allow for fitting connection.

[0042] 2 and 5(B), this retaining structure prevents the fourth inner cover 24 from coming off relatively to the first outer cover 31, and also prevents the fourth inner cover 24 from coming off relatively to the second outer cover 32, by attaching retaining members 5 to both ends, one end and the other end, of the fourth inner cover 24. Here, as shown in Figures 1, 2, etc., the length direction of the fourth inner cover 24, which is the inner cover 2, will be referred to as the "cover length direction X," and the radial direction of the fourth inner cover 24, which is the inner cover 2, will be referred to as the "cover radial direction Y."

[0043] As shown in Figures 2 and 5(B), when the anti-slip device 5 is attached to the end of the fourth inner cover 24, it has an outer portion 51 located outside the fourth inner cover 24 in the cover radial direction Y, an inner portion 52 located inside the fourth inner cover 24 in the cover radial direction Y, and a connecting portion 53 connecting the outer portion 51 and the inner portion 52.

[0044] As shown in Fig. 3(A), the outer portion 51 is formed in a plate shape extending from the base end side to the tip end side along the cover length direction X, and the tip end side portion forms an inclined portion 54 inclined outward in the cover radial direction Y. As shown in Fig. 3(B), an opening 55 is provided in the center of the tip end of the outer portion 51, and a first claw portion 56 is provided within the opening 55, extending from the tip end side of the outer portion 51 to the base end side. As shown in Fig. 3(A), this first claw portion 56 is provided in an orientation such that it extends obliquely from the outward side to the inward side in the cover radial direction Y, utilizing the inclined portion 54, and the tip end of the first claw portion 56 protrudes inward (downward in Fig. 3(A)) than the outer portion 51 in the cover radial direction Y.

[0045] As shown in Fig. 3(A) , like the outer region 51, the inner region 52 includes a plate-shaped inner central region 57 extending from the base end to the tip end along the cover length direction X, and a pair of left and right inner upright wall portions 58 extending from the inner side to the outer side in the cover radial direction Y are provided at both left and right ends of the inner central region 57. Each of the pair of left and right inner upright wall portions 58 is provided with a second claw portion 59 extending from the inner side to the outer side in the cover radial direction Y on the side away from the connecting region 53. The tip end of each second claw portion 59 is the portion of the inner upright wall portion 58 that protrudes furthest outward in the cover radial direction Y (upward in Fig. 3(A) ).

[0046] As shown in Fig. 3(A), the connecting portion 53 is formed in a plate shape extending in the cover radial direction Y. The outer portion 51, the connecting portion 53, and the inner central portion 57 of the inner portion 52 form a continuous U-shape in side view. The inner portion 52 is formed in a continuous U-shape in front view by the inner central portion 57 and a pair of left and right inner upright wall portions 58. The retaining device 5 is formed in a shape combining two U-shapes, with the inner central portion 57 of the inner portion 52 being shared.

[0047] As shown in Figure 3(B), the width H1 in the left-right direction of the connecting portion 53 is the same as the width of the outer portion 51 in the left-right direction. In contrast, the width H2 in the left-right direction of the inner central portion 57 of the inner portion 52 is wider by a predetermined amount than the width H1 in the left-right direction of the connecting portion 53. As a result, the outer portion 51 and the pair of left and right inner upright wall portions 58 are arranged independently and spaced apart from each other in the left-right direction without overlapping with each other.

[0048] As shown in FIG. 3(A), the stopper 5 has a gap between the outer portion 51 and the pair of left and right inner upright wall portions 58 in the cover radial direction Y. As shown in FIG. 5(A), the stopper 5 is configured to be attachable to the end of the fourth inner cover 24 by inserting the fourth inner cover 24 into the gap. As shown in FIG. 6(B), when the stopper 5 is attached to the end of the fourth inner cover 24, the fourth inner cover 24 is sandwiched between the outer portion 51 and the pair of left and right inner upright wall portions 58 of the inner portion 52. As shown in FIG. 2 and FIG. 6, the stopper 5 is provided with an attachment portion 70 that can be attached to the end of the fourth inner cover 24 in a state where the inner and outer sides of the divided fourth inner cover 24a are sandwiched between them. This attachment portion 70 is configured by the outer portion 51, the inner portion 52, and the connecting portion 53.

[0049] As shown in Figures 3 and 6, first claw portions 56 are provided on the outer portion 51, and second claw portions 59 are provided on each of the pair of left and right inner upright wall portions 58, so that the mounting portion 70 is provided with the first claw portions 56 and second claw portions 59 that can be engaged with the divided fourth inner cover 24a. As shown in Figure 6(A), the first claw portions 56 can be engaged with the outer surface of the divided fourth inner cover 24a. As shown in Figure 6(B), the second claw portions 59 can be engaged with the inner surface of the divided fourth inner cover 24a. The first claw portions 56 and the second claw portions 59 engage the divided fourth inner cover 24a in a state where they sandwich it from both the inside and outside.

[0050] As shown in FIG. 3 , the retainer 5 has a gap formed between the outer region 51 and the inner upright wall portion 58. As shown in FIG. 5 , the retainer 5 is attached to the end of the inner cover 2 by inserting the inner cover 2 into the gap between the outer region 51 and the inner upright wall portion 58. At this time, for example, because the thickness of the inner cover 2 is greater than the gap between the outer region 51 and the inner upright wall portion 58, the inner cover 2 is inserted into the gap between the outer region 51 and the inner upright wall portion 58 while being elastically deformed to separate the outer region 51 and the inner upright wall portion 58. Therefore, due to the action of an elastic restoring force caused by the elastic deformation, the inner cover 2 is sandwiched between the outer region 51 and the inner upright wall portion 58, and the first claw portion 56 and the second claw portion 59 bite into the inner cover 2, as shown in FIG. 6 , thereby easily and reliably attaching the retainer 5 to the inner cover 2.

[0051] 3(A) and 6, the first claw portion 56 and the second claw portion 59 are both formed with an inclination that inclines toward the side that narrows the gap between the outer portion 51 and the claw portions 56, 59 toward the back in the insertion direction of the fourth inner cover 24 (to the left in FIG. 6). Therefore, when attaching the stopper 5 to the fourth inner cover 24, when the fourth inner cover 24 is inserted into the gap between the outer portion 51 and the inner upright wall portion 58, the first claw portion 56 and the second claw portion 59 do not get caught on the outer surface portion or inner surface portion of the fourth inner cover 24, and the insertion of the fourth inner cover 24 can be performed smoothly, making the attachment work of the stopper 5 easy. When the anti-slip device 5 is attached to the end of the inner cover 2, as shown in Figures 5(B) and 6, the elastic force causes the outer portion 51 and the inner upright wall portion 58 to clamp the inner cover 2, so that the first claw portion 56 and the second claw portion 59 can clamp the inner cover 2 from both the inside and outside.

[0052] As shown in Figures 3 and 6(B), each of the pair of left and right inner upright wall portions 58 is provided with a stopper anti-rattle portion 60 in addition to the second claw portion 59. The stopper anti-rattle portion 60 is disposed on the side closer to the connecting portion 53, opposite to the second claw portion 59. The stopper anti-rattle portion 60 is configured to be able to abut against the inner surface of the inner cover 2 when the first claw portion 56 and the second claw portion 59 are engaged with the inner cover 2. As shown in Figure 3(A), the stopper anti-rattle portion 60 is formed in an inclined shape such that the side closer to the connecting portion 53 is closer to the outer portion 51 (upper side), and the portion closest to the connecting portion 53 is the abutment portion 60a. 6(B), the contact portion 60a of the retainer wobble prevention portion 60 is disposed on the side (lower side) that is away from the outer portion 51 by a predetermined amount from the tip of the second claw portion 59, and can only come into contact with the inner surface of the fourth inner cover 24 when the second claw portion 59 is engaged with the inner surface of the inner cover 2. The contact portion 60a of the retainer wobble prevention portion 60 comes into contact with the inner cover 2, thereby suppressing wobble of the retainer 5.

[0053] (Prevention part) As shown in Fig. 7, the stopper 5 is provided with a stopper acting portion 71 that, when attached to the fourth inner cover 24, engages with the inner surface of the outer cover 3 (first outer cover 31 or second outer cover 32) to exert a stopper effect of preventing relative separation between the fourth inner cover 24 and the outer cover 3. Incidentally, Fig. 7 shows an enlarged cross-sectional view of the right side of the connection point between the fourth inner cover 24 and the first outer cover 31 in Fig. 1.

[0054] As shown in Figures 3(A) and 7, the anti-slip portion 71 is composed of the inclined portion 54 of the outer portion 51, and as shown in Figure 7(B), by abutting the inclined portion 54 against the anti-slip locking portion 35 of the outer cover 3, it is locked against the inner surface of the outer cover 3, thereby exerting an anti-slip effect.

[0055] When the stopper 5 is attached to the end of the fourth inner cover 24, as shown in FIG. 7(A), the inclined portion 54 of the outer portion 51 is inclined so that it approaches the inner surface of the first outer cover 31 as it approaches the tip (lower side) of the outer portion 51. The inner surface of the first outer cover 31 is provided with a stopper locking portion 35 that protrudes inward. This stopper locking portion 35 is disposed over the entire circumferential length of the first outer cover 31 by causing a portion of the fastener attachment portion 34 to protrude inward (see FIG. 4). Returning to FIG. 7(A), when the first outer cover 31 is externally connected to the end of the fourth inner cover 24, an insertion allowance is ensured so that the fourth inner cover 24 and the first outer cover 31 overlap, and therefore the inclined portion 54 of the stopper 5 and the stopper locking portion 35 of the first outer cover 31 are spaced apart.

[0056] At this time, if the fourth inner cover 24 and the first outer cover 31 move relative to each other for some reason, there will be no insertion allowance for the fourth inner cover 24 and the first outer cover 31 to overlap, and there is a possibility that the fourth inner cover 24 will come loose relative to the first outer cover 31. Therefore, even if the fourth inner cover 24 and the first outer cover 31 move relative to each other, as shown in Figure 7(B), the inclined portion 54 of the stopper 5 comes into contact with the stopper latch portion 35 of the first outer cover 31, thereby preventing further relative movement and preventing the fourth inner cover 24 and the first outer cover 31 from coming loose relative to each other.

[0057] As shown in FIG. 7(B), when the inclined portion 54 of the stopper 5 comes into contact with the stopper engaging portion 35 of the first outer cover 31, a force (see arrow in FIG. 7(B)) acts on the stopper 5 in a direction that causes it to come off the fourth inner cover 24. However, as shown in FIG. 6, when this force (see arrow in FIG. 6) acts, a force that causes it to bite into the first claw portions 56 and the second claw portions 59 is applied. This strengthens the biting force of the first claw portions 56 and the second claw portions 59, preventing the stopper 5 from coming off the fourth inner cover 24. This makes it possible to maintain the state in which the stopper 5 is attached to the end portion of the fourth inner cover 24, and appropriately prevents the fourth inner cover 24 and the first outer cover 31 from coming off relative to each other.

[0058] The anti-slip device 5 is provided with not only an anti-slip action portion 71, but also an anti-slip action portion 72 which exerts an anti-slip action to prevent the divided fourth inner cover 24a from shifting, as shown in Figure 6, and an anti-disengagement action portion 73 which exerts an anti-disengagement action to prevent the mating portions 4 in the divided fourth inner cover 24a from disengaging from each other, as shown in Figure 8(B).

[0059] (Slip prevention part) As shown in Figures 3(A) and 6, the slippage prevention member 72 is configured to include the outer portion 51, the pair of left and right inner upright wall portions 58, the first claw portion 56, and the second claw portion 59 in the stopper 5. As shown in Figure 6, the slippage prevention member 72 includes a clamping body 74 formed by the outer portion 51 and the pair of left and right inner upright wall portions 58, and this clamping body 74 clamps the inner and outer surfaces of the divided fourth inner cover 24a. The first claw portion 56 and the second claw portion 59 (corresponding to claw portions) arranged on the outer portion 51 and the pair of left and right inner upright wall portions 58, which form the clamping body 74, grip both the inner and outer surfaces of the divided fourth inner cover 24a.

[0060] In this way, as shown in Figure 6, the anti-slip portion 72, by clamping the inner and outer sides of the split fourth inner cover 24a using the outer portion 51, the pair of left and right inner upright wall portions 58, the first claw portion 56, and the second claw portion 59, prevents the split fourth inner cover 24a from moving and exerts an anti-slip effect that prevents the split fourth inner cover 24a (corresponding to the split body) from shifting.

[0061] 6, when the stopper 5 is attached to the end of the fourth inner cover 24, the end of the divided fourth inner cover 24a abuts against the connecting portion 53 of the stopper 5. As a result, the connecting portion 53 can also prevent the divided fourth inner cover 24a from moving, and therefore the connecting portion 53 can also be provided as the slippage prevention portion 72.

[0062] (Mating prevention part) As shown in Figures 3(A) and 8(B), the fitting disengagement prevention action part 73 is configured to include an inner central part 57 and a pair of left and right inner upright wall parts 58 in the stopper 5. As shown in Figures 5(B) and 7(B), the fitting disengagement prevention action part 73 prevents the fitting parts 4 from disengaging by surrounding the fitted fitting parts 4 with the inner central part 57 and the pair of left and right inner upright wall parts 58.

[0063] As shown in FIG. 5(A), each of the two divided fourth inner covers 24a has a fitting portion 4 at both circumferential ends thereof, and the fitting portions 4 are fitted together to form the cylindrical fourth inner cover 24. When attaching the stopper 5 to the end of the fourth inner cover 24, the stopper 5 is attached to the fitted fitting portions 4. As shown in FIG. 3(A), the stopper 5 has an inner portion 52 including an inner central portion 57 and a pair of left and right inner upright wall portions 58, thereby forming a space 61 surrounded on three sides by the inner central portion 57 and the pair of left and right inner upright wall portions 58. Therefore, as shown in FIG. 5(A), the fitted fitting portions 4 are inserted into this space 61, whereby the stopper 5 can be attached to the fitted fitting portions 4.

[0064] In this way, when the anti-slip device 5 is attached to the mated mating portions 4, as shown in Figures 5(B) and 8(B), the mated mating portions 4 can be surrounded in three directions, including the inner side of the fourth inner cover 24 and both sides in the circumferential direction, by the inner central portion 57 and a pair of left and right inner upright wall portions 58.

[0065] As a result, even if an external force acts obliquely from the outer side toward the inner side of the fourth inner cover 24, as shown by the arrows in Figure 8(A), as shown in Figure 8(B), the inner central portion 57 and the pair of left and right inner upright wall portions 58 can restrict movement of the engaged engaging portions 4 in three directions: the inner side of the fourth inner cover 24 and both sides in the circumferential direction, and can appropriately prevent the engaging portions 4 from coming apart.

[0066] As shown in Figure 8 (B), the inner central portion 57 and the pair of left and right inner upright wall portions 58 surround the mated mating portions 4, and by abutting against the mating portions 4, they restrict the mating portions 4 from moving in the direction of disengagement, so the inner central portion 57 and the pair of left and right inner upright wall portions 58 are provided as the surrounding portion 75 and the restricting wall portion 76.

[0067] Incidentally, when the stopper 5 is attached to the mated fitting portions 4, a connecting portion 53 of the stopper 5 exists between the mated fitting portions 4 in the length direction of the fourth inner cover 24. This connecting portion 53 also restricts movement of the mated fitting portions 4 between the mated fitting portions 4 in the length direction of the fourth inner cover 24.

[0068] As described above, the fourth inner cover 24 is shorter than the other first to third inner covers 21 to 23, and therefore the length over which the mating portions 4 fit together is shorter. Therefore, the fourth inner cover 24 may have its mating portions 4 come apart when subjected to a smaller external force than the other first to third inner covers 21 to 23. For this reason, the short fourth inner cover 24 is particularly useful because the mating disengagement prevention portion 73 exerts a mating disengagement prevention effect that prevents the mating portions 4 of the divided fourth inner covers 24a from coming apart.

[0069] With regard to the inner cover 2, by aligning the positions of the two divided fourth inner covers 24a (corresponding to divided bodies) and fitting the fitting portions 4 together, the fourth inner cover 24 can be brought into an assembled state by fitting and connecting the fitting portions 4 together without causing misalignment of the divided fourth inner covers 24a. To maintain this assembled state, the misalignment prevention portion 72 prevents misalignment of the divided fourth inner covers 24a, thereby maintaining the fourth inner cover 24 in an assembled state, and the misalignment prevention portion 73 also prevents disengagement of the fitting portions 4, thereby maintaining the fourth inner cover 24 in an assembled state. Therefore, the assembly state maintaining portion that exerts an assembled state maintaining effect to maintain the fourth inner cover 24 in an assembled state can be configured by at least one of the misalignment prevention portion 72 and the disengagement prevention portion 73.

[0070] As described above, the stopper 5 is provided with the stopper portion 71, the slippage prevention portion 72, and the fitting / disengagement prevention portion 73, and performs three functions of preventing slippage, slippage, and fitting / disengagement when attached to the inner cover 2. As a result, by using the stopper 5 at the connection point between the inner cover 2 and the outer cover 3, a stopper structure having these three functions can be achieved, and not only can the inner cover 2 and the outer cover 3 be prevented from coming off relative to each other, but the inner cover 2 can also be maintained in an appropriate state, thereby maintaining the connection state between the inner cover 2 and the outer cover 3 in an appropriate state.

[0071] The retaining device 5 can be manufactured by, for example, punching and bending a metal plate. By making the retaining device 5 out of metal in this way, it is possible to form the first claw portion 56 and the second claw portion 59 that can be properly interlocked. Furthermore, by making the retaining device 5 into a thin metal plate, it can be inserted into even a narrow space, such as between the outer surface of the inner cover 2 and the inner surface of the outer cover 3, at the connection point between the inner cover 2 and the outer cover 3, and can be properly installed at the end of the inner cover 2.

[0072] As shown in Figure 2, there are five connection points between the inner cover 2 and the outer cover 3, and at each of these five connection points, a stopper 5 is attached to the end of the inner cover 2, thereby providing a stopper structure that not only prevents the inner cover 2 and the outer cover 3 from coming loose relative to each other at all five points, but also maintains the inner cover 2 in an appropriate state, thereby maintaining the connection between the inner cover 2 and the outer cover 3 in an appropriate state.

[0073] Here, as shown in FIG. 7(B), an explanation will be given of the retaining engagement portion 35 that is the contact object against which the inclined portion 54 of the retaining tool 5 comes into contact when the retaining action portion 71 exerts its retaining action.

[0074] 4, the first outer cover 31 is provided with retaining locking portions 35 along its entire circumferential length at both left and right ends and the lower end, which are connected to the inner cover 2. The second outer cover 32 is provided with retaining locking portions 35 along its entire circumferential length at its upper and right ends, which are connected to the inner cover 2. In this way, the outer cover 3 is provided with retaining locking portions 35 at the ends where the inner cover 2 is connected. Therefore, at any connection point between the inner cover 2 and the outer cover 3, the inclined portions 54 of the retaining device 5 come into contact with the retaining locking portions 35, thereby appropriately achieving a retaining effect that prevents the inner cover 2 and the outer cover 3 from coming off relative to each other.

[0075] These retaining latches 35 were originally provided for another purpose. For example, when using a fastener to secure the inner cover 2, the outer cover 3, etc. to a wall surface or the like, the fastener can be inserted into the outer cover 3 through the gap between the inner cover 2 and the outer cover 3, and the fastener can be hooked onto the retaining latches 35 to lock it in place.

[0076] In this way, the retaining locking portion 35 is used to secure the inner cover 2 and the outer cover 3, and is also used as it is to exert a retaining effect by being the abutting target for the inclined portion 54 of the retaining device 5. As a result, rather than providing a new retaining locking portion 35 to exert the retaining effect, a component used for another purpose can be used for the same purpose, thereby simplifying the configuration.

[0077] When installing the inner cover 2, outer cover 3, retaining device 5, etc., the construction procedure can be carried out in the following order: pipe installation process, inner cover installation process, retaining device installation process, and outer cover installation process. The order of each process can be changed as appropriate depending on the construction situation, etc.

[0078] The pipe installation process is a process of installing the pipe 1 to an installation location such as a wall surface using pipe fasteners such as pipe bands. The inner cover installation process is a process of installing the inner cover 2 so as to cover the periphery of the installed pipe 1. For example, as shown in FIG. 4, the fourth inner cover 24 (inner cover 2) can be installed in an assembled state so as to cover the pipe 1 with a split fourth inner cover 24a (split body) in half.

[0079] The retaining device attaching step is a step of attaching a retaining device 5 to an end of the assembled inner cover 2. For example, as shown in FIG. 5(A), the retaining device 5 can be attached to the fitting portion 4 fitted in the fourth inner cover 24. The outer cover attaching step is a step of attaching the outer cover 3 to the end of the inner cover 2 in a state of being externally fitted and connected. For example, as shown in FIG. 4, the first outer cover 31 can be assembled by fitting and connecting a half divided first outer cover 31a to one end of the fourth inner cover 24 (inner cover 2) so as to cover one end of the fourth inner cover 24 from the outside, and the first outer cover 31 can be attached to one end of the fourth inner cover 24 in a state of being externally fitted and connected, and the second outer cover 32 can be assembled by fitting and connecting a half divided second outer cover 32a to the other end of the fourth inner cover 24 so as to cover the other end of the fourth inner cover 24 from the outside, and the first outer cover 31 can be attached to the other end of the fourth inner cover 24 in a state of being externally fitted and connected.

[0080] [Another embodiment] Other embodiments of the present invention will be described below. Note that the configurations of the embodiments described below are not limited to being applied independently, but can also be applied in combination with the configurations of other embodiments.

[0081] (1) In the above embodiment, the outer cover 3 is used to connect the linear inner covers 2 together. However, conversely, the inner cover 2 can also be used to connect the linear outer covers 3 together. The uses for the inner cover 2 and the outer cover 3 can be changed as appropriate.

[0082] (2) In the above embodiment, the inner cover 2 and the outer cover 3 are formed in a cylindrical shape, but the shapes of the inner cover 2 and the outer cover 3 can be changed as appropriate.

[0083] (3) In the above embodiment, as shown in Figures 1 and 2, the anti-slip structure of the present invention is exemplified at a branching point or a merging point of the pipe 1. However, for example, the anti-slip structure of the present invention can also be applied to a curved path portion where the pipe 1 is bent and arranged, and the location of the pipe path where the anti-slip structure of the present invention is applied can be changed as appropriate.

[0084] (4) In the above embodiment, an example of a retaining structure using the retaining device 5 is given. However, the shape and configuration of the retaining device 5 can be changed as appropriate, as long as it exerts a retaining effect of preventing the inner cover 2 and the outer cover 3 from coming off relative to each other, and exerts an assembled state maintaining effect of maintaining the assembled state in which multiple divided bodies are combined with the inner cover 2.

[0085] (5) In the above embodiment, the inner surface of the outer cover 3 is provided with the retaining locking portion 35 that abuts against the inclined portion 54 of the retaining device 5 to provide a retaining effect, but this retaining locking portion 35 may be omitted. In this case, for example, the tip of the inclined portion 54 of the retaining device 5 may be abutted against the inner surface of the outer cover 3 to be engaged, or the inclined portion 54 may be provided with a claw portion or the like that bites into the inner surface of the outer cover 3, thereby providing a retaining effect. [Explanation of symbols]

[0086] 1 Piping 2 Inner cover 3 Outer cover 4. Fitting 5 Stopper 24a Fourth split inner cover (split body) 56 First claw part (claw part) 59 Second claw (claw) 70 Mounting part (outer part 51, inner part 52, connection part 53) 71 retaining action part (inclined part 54) 72 anti-slip action portion (outer portion 51, inner upright wall portion 58, first claw portion 56, second claw portion 59) 73 Fitting external anti-corrosion function part (inner central part 57, inner rising wall part 58) 74 Holding Body (Outer side 51, Inner side upright wall 58) 75 Inner part (inner central part 57, inner rising wall part 58) 76. Regulated wall section (inner central part 57, inner rising wall section 58)

Claims

1. A retaining structure for preventing relative removal of an inner cover for piping and an outer cover for piping that is fitted onto an end of the inner cover, A retainer is provided which is attachable to an end of the inner cover and which, when attached to the inner cover, engages with the inner surface of the outer cover to prevent the inner cover and the outer cover from coming off relative to each other, The stopper includes an assembly state maintaining portion that maintains the inner cover in an assembled state when attached to the inner cover, The inner cover is provided with a plurality of fitting portions, The inner cover is assembled by fitting the fitting portions together, The fitting portion is disposed inside the inner cover, the assembled state maintaining action portion has a surrounding portion that surrounds the periphery of the fitted mating portions, and is provided with a mating disengagement prevention action portion that exhibits a mating disengagement prevention action to prevent the mating portions surrounded by the surrounding portion from disengaging from each other, When the anti-slip device is attached to the inner cover, the surrounding portion of the anti-slip fitting portion is arranged on the inside of the inner cover, and the locking portion that locks onto the inner surface of the outer cover is arranged on the outside of the inner cover.

2. The retaining device is provided with a clamping body that clamps the inner surface side and the outer surface side of the inner cover when attached to the inner cover, The retaining structure according to claim 1 , wherein the surrounding portion is disposed on the inner surface side of the inner cover of the clamping body.

3. The surrounding portion is provided with a restricting wall portion that restricts the movement of the mated mating portions in the mating disengagement direction, The retaining structure according to claim 1 or 2, wherein the restricting wall portion is provided with a second claw portion extending along the rising direction of the restricting wall portion and engaging with the inner surface of the inner cover.

4. The retaining device is provided with a clamping body that clamps the inner surface side and the outer surface side of the inner cover when attached to the inner cover, The second claw portion is disposed on the inner surface side of the inner cover of the clamping body, The retaining structure according to claim 3, wherein the outer surface of the inner cover of the clamping body is provided with a first claw portion that bites into the outer surface of the inner cover.

5. A retaining device used in a retaining structure for preventing relative removal of an inner cover for piping and an outer cover for piping that is externally fitted and connected to the end of the inner cover, an attachment portion that can be attached to an end portion of the inner cover; a retaining portion that, when attached to the inner cover, engages with an inner surface of the outer cover to prevent the inner cover and the outer cover from coming off relative to each other; an assembled state maintaining portion that, when attached to the inner cover, maintains the inner cover in an assembled state in which the fitting portions are fitted together, The assembly state maintaining portion has a surrounding portion that surrounds the periphery of the mated mated portions inside the inner cover, and is provided with a mating disengagement preventing portion that exhibits a mating disengagement preventing action that prevents disengagement of the mating portions surrounded by the surrounding portion, When attached to the inner cover, the anti-detachment device has the surrounding portion of the anti-detachment action portion arranged on the inside of the inner cover, and the locking portion that locks onto the inner surface of the outer cover arranged on the outside of the inner cover.

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