Pet toilet body and system toilet for pets

Abstract

To improve the maintainability of a pet toilet body and a system toilet for pets.SOLUTION: A pet toilet body according to one aspect comprises: a bottom plate part that has a bottom surface part and an outer edge part which surrounds the bottom surface part; a middle frame part that is disposed on the outer edge part of the bottom plate part; and an upper frame part that is disposed on the middle frame part. The bottom plate part and the middle frame part have a lower mating structure which includes: a first mating protrusion that is formed on one of the bottom plate part and the middle frame part; and a first mating recess that is formed on the other one of the bottom plate part and the middle frame part. The lower mating structure restricts relative movement of the bottom plate part and the middle frame part with mating of the first mating protrusion and the first mating recess. The middle frame part and the upper frame part have an upper mating structure which includes: a second mating protrusion that is formed on one of the middle frame part and the upper frame part; and a second mating recess that is formed on the other one of the middle frame part and the upper frame part. The upper mating structure restricts relative movement of the middle frame part and the upper frame part with mating of the second mating protrusion and the second mating recess.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a pet toilet body and a pet toilet system. [Background technology]

[0002] Conventionally, pet toilets having an absorbent sheet for absorbing pet urine have been used to treat the excrement of pets such as cats and dogs kept indoors. For example, Patent Document 1 discloses a pet toilet system that includes an absorbent sheet for absorbing pet urine, a tray for storing the absorbent sheet, and a liquid-permeable panel having a corrugated honeycomb structure provided on the absorbent sheet. This system toilet prevents the pet's legs from directly contacting the absorbent sheet by placing the liquid-permeable panel on the absorbent sheet, and prevents urine from flowing back from the absorbent sheet to the pet. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-205541 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the pet toilet system described in Patent Document 1, the absorbent sheet and the liquid-permeable panel are simply placed on the tray, so when a pet moves on the toilet system, the absorbent sheet and the liquid-permeable panel may shift from the tray. In addition, the absorbent sheet needs to be replaced periodically, but when replacing only the absorbent sheet of the toilet system, it is necessary to lift the liquid-permeable panel by hand, replace the absorbent sheet, and then place the permeable panel on a new absorbent mat. Therefore, the user's hands get dirty when replacing the absorbent sheet, which is unsanitary.

[0005] Therefore, an object of the present disclosure is to provide a pet toilet body and a pet toilet system that are easy to maintain. [Means for solving the problem]

[0006] A pet toilet body in one embodiment comprises a bottom plate portion having a bottom portion and an outer edge portion surrounding the bottom plate portion, a middle frame portion arranged on the outer edge portion of the bottom plate portion, and an upper frame portion arranged on the middle frame portion, wherein the bottom plate portion and the middle frame portion include a first mating convex portion formed on one of the bottom plate portion and the middle frame portion and a first mating recess portion formed on the other of the bottom plate portion and the middle frame portion, and have a lower mating structure that restricts relative movement between the bottom plate portion and the middle frame portion by mating between the first mating convex portion and the first mating recess, and the middle frame portion and the upper frame portion include a second mating convex portion formed on one of the middle frame portion and the upper frame portion and a second mating recess portion formed on the other of the middle frame portion and the upper frame portion, and have an upper mating structure that restricts relative movement between the middle frame portion and the upper frame portion by mating between the second mating convex portion and the second mating recess.

[0007] In the pet toilet body according to the above embodiment, for example, when an absorbent sheet is disposed between the bottom plate and the middle frame, and a water-permeable mat is disposed between the middle frame and the upper frame, the absorbent sheet is sandwiched between the bottom plate and the middle frame by the engagement between the first fitting convex portion and the first fitting concave portion, and the water-permeable mat is sandwiched between the middle frame and the upper frame by the engagement between the second fitting convex portion and the second fitting concave portion. Therefore, it is possible to suppress the displacement of the absorbent sheet and the water-permeable mat. In addition, by releasing the engagement between the first fitting convex portion and the first fitting concave portion, the absorbent sheet can be replaced individually, and by releasing the engagement between the second fitting convex portion and the second fitting concave portion, the water-permeable mat can be replaced individually. Therefore, it is possible to improve the maintainability of the pet toilet body.

[0008] The middle frame portion and the upper frame portion may be made of a flexible resin, in which case the middle frame portion and the upper frame portion can be flexed to facilitate attachment and detachment of the middle frame portion and the upper frame portion.

[0009] The bottom plate portion may include a first fitting recess, the middle frame portion may include a first fitting convex portion protruding toward the first fitting recess and a second fitting recess, and the upper frame portion may include a second fitting convex portion protruding toward the second fitting recess. In this case, the first fitting convex portion of the middle frame portion fits into the first fitting recess of the bottom plate portion, and the second fitting convex portion of the upper frame portion fits into the second fitting recess of the middle frame portion, thereby detachably connecting the bottom plate portion, the middle frame portion, and the upper frame portion.

[0010] In the stacking direction of the bottom plate portion, the middle frame portion, and the upper frame portion, the maximum length of the second fitting convex portion may be longer than the maximum length of the first fitting convex portion. By making the maximum length of the second fitting convex portion longer than the maximum length of the first fitting convex portion, it becomes possible to effectively suppress displacement of the water-permeable mat when the water-permeable mat is disposed between the middle frame portion and the upper frame portion.

[0011] The upper frame may further include an inner peripheral convex portion formed along the inner edge of the upper frame and protruding toward the bottom plate portion, and a tip of the inner peripheral convex portion may be disposed closer to the bottom plate portion than a tip of the second fitting convex portion. In this case, when the water-permeable mat is disposed between the middle frame portion and the upper frame portion, the water-permeable mat can be held down using both the second fitting convex portion and the inner peripheral convex portion, so that it is possible to more effectively suppress the displacement of the water-permeable mat.

[0012] The upper surface of the bottom portion may have an uneven shape. By making the upper surface of the bottom portion uneven, it is possible to prevent a pet standing on the bottom portion from slipping on its legs when it relieves itself.

[0013] The upper frame portion has a pair of first upper frame sides extending in a first direction and a pair of second upper frame sides extending in a second direction perpendicular to the first direction, and the width of the pair of first upper frame sides in the second direction may be smaller than the width of the pair of second upper frame sides in the first direction. By making the width of the pair of first upper frame sides smaller than the width of the pair of second upper frame sides, a pet can easily straddle the relatively narrow first upper frame sides and ride on the bottom portion.

[0014] The upper surface of the upper frame may be inclined so as to approach the bottom plate portion as it approaches the inner edge of the upper frame portion. In this case, if a pet accidentally urinates on the upper frame portion, the urine can be directed toward the bottom plate portion.

[0015] The inclination angle of the upper surface of the upper frame portion may increase toward the inner edge of the upper frame portion, in which case urine can be more reliably directed toward the bottom plate portion.

[0016] The upper surfaces of the pair of first upper frame sides may have an uneven shape with concave and convex portions alternately arranged in a first direction, and the upper surfaces of the pair of second upper frame sides may have an uneven shape with concave and convex portions alternately arranged in a second direction. In this case, when a pet accidentally urinates on the upper frame portion, the urine can be collected in the concave portions of the pair of first upper frame sides and the pair of second upper frame sides.

[0017] The recesses of the pair of first upper frame sides and the pair of second upper frame sides may have an inclined surface that curves toward the middle frame part as it moves away from the adjacent protrusion. In this case, urine discharged into the upper frame part can be collected in the center of the recesses and flow toward the bottom plate part.

[0018] The upper frame portion may have a first locking structure that locks the upper frame portion to the middle frame portion. In this case, the first locking structure can prevent the middle frame portion and the upper frame portion from shifting from each other.

[0019] The inner frame portion may have a second locking structure that locks the inner frame portion to the bottom plate portion. In this case, the second locking structure can prevent the bottom plate portion and the inner frame portion from shifting from each other.

[0020] The toilet body may further include a plurality of locking devices provided on the pair of first upper frame sides and the pair of second upper frame sides to fix the upper frame part to the middle frame part. In this case, it is possible to prevent the upper frame part from being unintentionally detached from the middle frame part.

[0021] A pet toilet system according to one embodiment includes a bottom plate portion having a bottom portion and an outer edge portion surrounding the bottom portion, a middle frame portion arranged on the outer edge portion of the bottom plate portion, an upper frame portion arranged on the middle frame portion, an absorbent sheet having water absorption properties arranged between the bottom plate portion and the middle frame portion, and a porous water-permeable mat arranged between the middle frame portion and the upper frame portion, wherein the bottom plate portion and the middle frame portion include a first mating convex portion formed on one of the bottom plate portion and the middle frame portion and a first mating recess portion formed on the other of the bottom plate portion and the middle frame portion, and have a lower mating structure that holds the absorbent sheet by mating between the first mating convex portion and the first mating recess, and the middle frame portion and the upper frame portion include a second mating convex portion formed on one of the middle frame portion and the upper frame portion and a second mating recess portion formed on the other of the middle frame portion and the upper frame portion, and have an upper mating structure that holds the water-permeable mat by mating between the second mating convex portion and the second mating recess.

[0022] In the pet toilet system according to the above aspect, the absorbent sheet is sandwiched between the bottom plate and the middle frame by the first fitting convex portion and the first fitting concave portion, and the water-permeable mat is sandwiched between the middle frame and the upper frame by the second fitting convex portion and the second fitting concave portion. Therefore, it is possible to suppress the displacement of the absorbent sheet and the water-permeable mat. In addition, the absorbent sheet can be individually replaced by releasing the engagement between the first fitting convex portion and the first fitting concave portion, and the water-permeable mat can be individually replaced by releasing the engagement between the second fitting convex portion and the second fitting concave portion. Therefore, it is possible to improve the maintainability of the pet toilet body.

[0023] The retention force of the water-permeable mat in the upper fitting structure may be greater than the retention force of the absorbent sheet in the lower fitting structure. In this case, the absorbent sheet is tightly held, so that it is possible to effectively prevent the water-permeable mat from slipping. Effect of the Invention

[0024] According to various aspects of the present invention, it is possible to improve the ease of maintenance of the pet toilet body and the pet toilet system. [Brief description of the drawings]

[0025] [Figure 1] FIG. 1 is a perspective view showing a system toilet for pets according to one embodiment. [Diagram 2] FIG. 2 is an exploded perspective view showing main components of the pet toilet system shown in FIG. 1. [Diagram 3] 2 is a cross-sectional view of the pet toilet system taken along line AA in FIG. 1. [Figure 4] FIG. 4 is an enlarged cross-sectional view of a part of FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. 2 is a schematic plan view of an absorbent sheet. [Figure 12] FIG. 12 is a cross-sectional view taken along line BB in FIG. [Figure 13] FIG. 2 is an enlarged plan view showing a portion of a water-permeable mat. [Figure 14] FIG. 11 is a perspective view of a toilet body according to another embodiment. [Figure 15] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the drawings. In the description of the drawings, the same elements are given the same reference numerals, and duplicated descriptions are omitted. The drawings may be partially simplified or exaggerated for ease of understanding, and the dimensional ratios are not limited to those shown in the drawings.

[0027] Hereinafter, a system toilet for pets (hereinafter referred to as "system toilet") including a pet toilet main body (hereinafter referred to as "toilet main body") according to one embodiment will be described. Fig. 1 is a perspective view showing a system toilet 1 according to one embodiment. Fig. 2 is a perspective view showing the main components of the system toilet 1 disassembled. Fig. 3 is a cross-sectional view taken along line AA in Fig. 1. Fig. 4 is a cross-sectional view showing an enlarged fitting portion of the system toilet 1 shown in Fig. 3.

[0028] The system toilet 1 shown in Figs. 1 to 4 is an excretion device for pets. In this specification, pets broadly include vertebrates and invertebrates, and typically include pet animals such as dogs, cats, rabbits, and hamsters. Typically, the system toilet 1 is installed indoors for pets kept indoors and provides an excretion space. Pet excrement is typically urine, but also includes body fluids such as low-viscosity feces, saliva, and blood.

[0029] 1 and 2, the system toilet 1 includes a toilet body 2, an absorbent sheet 3 having water-absorbing properties, and a water-permeable mat 4 placed on the absorbent sheet 3. The toilet body 2 holds the absorbent sheet 3 and the water-permeable mat 4.

[0030] In the following description, the stacking direction of the absorbent sheet 3 and the water-permeable mat 4 is referred to as the "vertical direction Z," and the two directions perpendicular to the vertical direction Z are referred to as the "width direction X" and the "depth direction Y," respectively. In the embodiment shown in Fig. 1, the width direction X (second direction) is parallel to the longitudinal direction of the toilet body 2, and the depth direction Y (first direction) is parallel to the lateral direction of the toilet body 2. In addition, the direction from the absorbent sheet 3 toward the water-permeable mat 4 is referred to as the "upward direction," and the direction from the water-permeable mat 4 toward the absorbent sheet 3 is referred to as the "downward direction."

[0031] The toilet body 2 is a device for holding the absorbent sheet 3 and the water-permeable mat 4. As shown in Fig. 2, the toilet body 2 includes a bottom plate portion 11, a middle frame portion 12 arranged on the bottom plate portion 11, and an upper frame portion 13 arranged on the middle frame portion 12. The bottom plate portion 11, the middle frame portion 12, and the upper frame portion 13 are formed by molding, for example, a thermoplastic resin, and are flexible. As will be described later, the bottom plate portion 11, the middle frame portion 12, and the upper frame portion 13 are detachable from each other in the vertical direction Z.

[0032] FIG. 5 is a perspective view of the bottom plate 11 of the toilet body 2. As shown in FIG. 5, the bottom plate 11 has a substantially rectangular bottom surface 21 with the width direction X as the longitudinal direction when viewed from the vertical direction Z, and an outer edge portion 22 surrounding the bottom surface 21. The bottom surface 21 has an upper surface 23 on which the absorbent sheet 3 is placed. The upper surface 23 of the bottom surface 21 has an uneven shape. Specifically, the upper surface 23 has a plurality of recesses 23a recessed downward and a protrusion 23b protruding upward. The plurality of recesses 23a are two-dimensionally arranged along the width direction X and the depth direction Y. Each of the plurality of recesses 23a is formed in a quadrangular shape (square shape) when viewed from the vertical direction Z. The protrusion 23b is formed in a lattice shape that divides the plurality of recesses 23a.

[0033] The outer edge portion 22 is formed in a substantially rectangular frame shape when viewed from the vertical direction Z, and is disposed so as to surround the bottom surface portion 21. Typically, the outer edge portion 22 is formed integrally with the bottom surface portion 21 by a thermoplastic resin. The outer edge portion 22 includes a side wall portion 24 rising upward from the outer edge of the bottom surface portion 21, an inner peripheral portion 25 extending outward from the upper end of the side wall portion 24, and an outer peripheral portion 26 extending outward from the outer edge of the inner peripheral portion 25. The side wall portion 24 has a function of blocking urine excreted on the bottom surface portion 21 through the water permeable mat 4 and the absorbent sheet 3. The side wall portion 24 may have a notch (not shown) formed therein for returning urine that has entered a fitting recess 27 (described later) to the bottom surface portion.

[0034] The inner peripheral portion 25 is provided on the outside of the side wall portion 24, and has an upper surface 25a disposed above the upper surface 23 of the bottom surface portion 21 (see FIG. 4). The inner peripheral portion 25 is formed with a fitting recess (first fitting recess) 27 recessed downward from the upper surface 25a of the inner peripheral portion 25. The fitting recess 27 is a groove having a substantially rectangular shape when viewed from the vertical direction Z, and is formed in the region between the side wall portion 24 and the outer peripheral portion 26. The bottom of the fitting recess 27 is disposed above the upper surface 23 of the bottom surface portion 21, and below the upper surface 25a of the inner peripheral portion 25.

[0035] The outer circumferential portion 26 is provided outside the inner circumferential portion 25, and has an upper surface 26a disposed above an upper surface 25a of the inner circumferential portion 25. At a pair of ends of the outer circumferential portion 26 in the depth direction Y, cutout portions 26b are formed by cutting out a part of the outer circumferential portion 26 toward the depth direction Y. A columnar connecting portion 28 is provided in the cutout portion 26b. The connecting portion 28 extends in the width direction X, and both ends are connected to the outer circumferential portion 26.

[0036] Fig. 6 is a perspective view of the middle frame portion 12, and Fig. 7 is a bottom view of the middle frame portion 12. The middle frame portion 12 has a substantially rectangular frame shape when viewed from the up-down direction Z, and is detachably attached to the outer edge portion 22 of the bottom plate portion 11. The middle frame portion 12 includes an inner peripheral portion 31 and an outer peripheral portion 32 disposed outside the inner peripheral portion 31. When the middle frame portion 12 is attached to the bottom plate portion 11, the inner peripheral portion 31 of the middle frame portion 12 is disposed above the inner peripheral portion 25 of the bottom plate portion 11, and the outer peripheral portion 32 of the middle frame portion 12 is disposed above the outer peripheral portion 26 of the bottom plate portion 11.

[0037] As shown in FIG. 4 and FIG. 6, the inner periphery 31 has a fitting protrusion (first fitting protrusion) 33 and a fitting recess (second fitting recess) 34. The fitting protrusion 33 is formed along the inner edge of the middle frame 12 and has a substantially rectangular shape when viewed from below. The fitting protrusion 33 protrudes downward (toward the bottom plate 11) from the lower surface of the middle frame 12. The fitting protrusion 33 is disposed at a position facing the fitting recess 27 of the bottom surface 21 and can be fitted into the fitting recess 27. When the fitting protrusion 33 is fitted into the fitting recess 27, the bottom plate 11 and the middle frame 12 are connected, and the displacement of the bottom plate 11 and the middle frame 12 in the horizontal direction (width direction X and depth direction Y) is suppressed. The fitting recess 27 and the fitting protrusion 33 constitute a lower fitting structure 10 that restricts the relative movement between the bottom plate 11 and the middle frame 12.

[0038] The fitting recess 34 is recessed downward from the upper surface of the inner circumferential portion 31. The fitting recess 34 is a groove having a substantially rectangular shape, and is disposed outside the fitting protrusion 33 as viewed from the vertical direction Z. As viewed from the vertical direction Z, the depth of the fitting recess 34 (the distance from the upper surface of the inner circumferential portion 31 to the bottom of the fitting recess 34 in the vertical direction Z) may be deeper than the depth of the fitting recess 27 (the distance from the upper surface 25a of the inner circumferential portion 25 to the bottom of the fitting recess 27 in the vertical direction Z).

[0039] One or more openings 37 may be formed in the bottom of the fitting recess 34 (see FIG. 7). The multiple openings 37 are through holes that penetrate the middle frame portion 12 in the thickness direction (up-down direction Z), and allow urine that has entered the fitting recess 34 to be discharged to the bottom portion 21.

[0040] The outer peripheral portion 32 of the middle frame portion 12 has an outer peripheral protrusion 35. The outer peripheral protrusion 35 is formed along the outer edge of the middle frame portion 12. The outer peripheral protrusion 35 has a substantially rectangular shape when viewed from below, and protrudes downward (toward the bottom plate portion 11) from the outer edge of the middle frame portion 12. As shown in FIG. 4, the tip of the outer peripheral protrusion 35 is disposed above the tip of the fitting protrusion 33 and below the bottom of the fitting recess 34. When the fitting protrusion 33 of the middle frame portion 12 is fitted into the fitting recess 27 of the bottom plate portion 11, the outer peripheral protrusion 35 is supported on the outer peripheral portion 26 of the bottom plate portion 11.

[0041] The inner frame portion 12 has a pair of first inner frame sides 12A extending in the width direction X and a pair of second inner frame sides 12B extending in the depth direction Y. As shown in Fig. 6, the length of the pair of first inner frame sides 12A in the width direction X is longer than the length of the pair of second inner frame sides 12B in the depth direction Y. The width w2 of the pair of second inner frame sides 12B in the width direction X may be smaller than the width w1 of the pair of first inner frame sides 12A in the depth direction Y.

[0042] The pair of first inner frame sides 12A have latches (second locking structures) 38 for locking the inner frame portion 12 to the bottom plate portion 11. The latches 38 include a latch body 38a extending downward from the outer edges of the pair of first inner frame sides 12A, and an extension portion 38b that is disposed inside the latch body 38a in the depth direction Y and faces the latch body 38a across a gap 38s (see FIG. 7).

[0043] The latch body 38a has a first claw portion 38c and a second claw portion 38d. The first claw portion 38c protrudes inward in the depth direction Y from the inner surface of the latch body 38a. The second claw portion 38d protrudes outward in the depth direction Y from the outer surface of the latch body 38a. When the middle frame portion 12 is attached onto the bottom plate portion 11, the connection portion 28 of the bottom plate portion 11 is accommodated in the gap 38s, and the first claw portion 38c is engaged with the connection portion 28 due to elastic deformation of the latch body 38a. This fixes the middle frame portion 12 to the bottom plate portion 11.

[0044] Fig. 8 is a perspective view of the upper frame portion 13, and Fig. 9 is a bottom view of the upper frame portion 13. The upper frame portion 13 has a substantially rectangular frame shape when viewed from the up-down direction Z, and is detachably attached onto the middle frame portion 12. The upper frame portion 13 includes an inner peripheral portion 41 and an outer peripheral portion 42 disposed outside the inner peripheral portion 41. When the upper frame portion 13 is attached onto the middle frame portion 12, the inner peripheral portion 41 of the upper frame portion 13 is disposed above the inner peripheral portion 31 of the middle frame portion 12, and the outer peripheral portion 42 of the upper frame portion 13 is disposed above the outer peripheral portion 32 of the middle frame portion 12.

[0045] The inner peripheral portion 41 of the upper frame portion 13 has an inner peripheral convex portion 43 and a fitting convex portion (second fitting convex portion) 44 (see FIG. 4). The inner peripheral convex portion 43 is formed along the inner edge of the upper frame portion 13 and has a generally rectangular shape when viewed from below. The inner peripheral convex portion 43 protrudes downward from the inner edge of the upper frame portion 13 towards the bottom plate portion 11.

[0046] The fitting protrusion 44 has a substantially rectangular shape when viewed from below, and is disposed outside the inner peripheral protrusion 43. The fitting protrusion 44 is disposed at a position facing the fitting recess 34 of the middle frame portion 12, and protrudes downward from the lower surface of the upper frame portion 13 toward the fitting recess 34. The fitting protrusion 44 can be fitted into the fitting recess 34. When the fitting protrusion 44 is fitted into the fitting recess 34, the middle frame portion 12 and the upper frame portion 13 are connected, and misalignment between the middle frame portion 12 and the upper frame portion 13 in the horizontal direction (width direction X and depth direction Y) is suppressed. The fitting recess 34 and the fitting protrusion 44 constitute an upper fitting structure 20 that restricts relative movement between the middle frame portion 12 and the upper frame portion 13.

[0047] 4, when the fitting recess 34 and the fitting protrusion 44 are fitted together, the lower end of the inner peripheral protrusion 43 is disposed lower than the lower end of the fitting protrusion 44. The maximum length of the fitting protrusion 44 of the upper frame 13 may be longer than the maximum length of the fitting protrusion 33. In one embodiment, the maximum length of the fitting protrusion 33 may be longer than the maximum length of the fitting protrusion 44.

[0048] The outer periphery 42 of the upper frame portion 13 has an outer periphery protrusion 45. The outer periphery protrusion 45 is formed along the outer edge of the upper frame portion 13. The outer periphery protrusion 45 has a generally rectangular shape when viewed from below, and protrudes downward from the outer edge of the upper frame portion 13 toward the middle frame portion 12. As shown in FIG. 4, when the upper frame portion 13 is attached to the middle frame portion 12 and the fitting protrusion 44 is fitted into the fitting recess 34, the outer periphery protrusion 45 of the upper frame portion 13 is supported on the outer periphery protrusion 35 of the middle frame portion 12.

[0049] 8, the upper frame portion 13 has a pair of first upper frame sides 13A extending in the width direction X and a pair of second upper frame sides 13B extending in the depth direction Y. The length of the pair of first upper frame sides 13A in the width direction X is longer than the length of the pair of second upper frame sides 13B in the depth direction Y. A width w4 in the width direction X of the pair of second upper frame sides 13B may be smaller than a width w3 in the depth direction Y of the pair of first upper frame sides 13A.

[0050] A pair of first upper frame sides 13A has a latch (first locking structure) 46 for locking the upper frame part 13 to the middle frame part 12. The latch 46 extends downward from the outer edge of the first upper frame side 13A. The latch 46 has an opening 46a penetrating the latch 46 in the thickness direction (depth direction Y). When attaching the upper frame part 13 to the middle frame part 12, the latch 46 slides along the outer surface of the latch 38 while elastically deforming so as to spread outward in the depth direction Y, and the second claw part 38d of the latch 38 fits into the opening 46a of the latch 46. As a result, the upper frame part 13 is fixed to the middle frame part 12. FIG. 10 is a side view showing the toilet body 2 in which the latch 46 of the upper frame part 13 fits into the latch 38 of the middle frame part 12, and the bottom plate part 11, the middle frame part 12, and the upper frame part 13 are connected.

[0051] 8, upper frame portion 13 has upper surface 47 that slopes downward (closer to bottom plate portion 11) from the outer edge to the inner edge of upper frame portion 13. Upper surface 47 is a curved surface whose slope angle increases closer to the inner edge of upper frame portion 13. Because upper surface 47 is sloped as described above, when a pet's urine splashes on upper frame portion 13, the urine can fall along upper surface 47 onto bottom plate portion 21.

[0052] In one embodiment, the upper surface 47 of the upper frame portion 13 may have an uneven shape. For example, a plurality of raised portions (convex portions) 48 extending in the depth direction Y are arranged at equal intervals along the width direction X on a pair of first upper frame sides 13A of the upper frame portion 13. Similarly, a plurality of raised portions 48 are arranged at equal intervals along the depth direction Y on a pair of second upper frame sides 13B of the upper frame portion 13. Between the plurality of raised portions 48, an inclined surface (concave portion) 49 that allows urine to flow toward the absorbent sheet 3 is formed. That is, on the upper surface 47 of the pair of first upper frame sides 13A, the raised portions 48 and the inclined surfaces 49 are alternately arranged in the width direction X, and on the upper surface 47 of the pair of second upper frame sides 13B, the raised portions 48 and the inclined surfaces 49 are alternately arranged in the depth direction Y. The inclined surfaces 49 are curved so as to approach downward as they move away from the adjacent raised portions 48. That is, since the center of inclined surface 49 in the width direction X or depth direction Y is the lowest, urine on upper frame portion 13 is collected at the center of inclined surface 49 and guided to bottom portion 21.

[0053] The toilet body 2 holds an absorbent sheet 3 and a water-permeable mat 4. The absorbent sheet 3 is a thin, water-absorbent sheet that is placed on the bottom surface 21 of the bottom plate 11 and absorbs pet urine. The absorbent sheet 3 has a substantially rectangular planar shape and has dimensions that correspond to the dimensions of the toilet body 2. For example, the absorbent sheet 3 has a length of 400 mm to 600 mm in the width direction X and a width of 300 mm to 500 mm in the depth direction Y.

[0054] FIG. 11 is a schematic plan view of the absorbent sheet 3. FIG. 12 is a cross-sectional view taken along the line BB in FIG. 11. As shown in FIGS. 11 and 12, the absorbent sheet 3 includes a top sheet 51 arranged on the top side of the absorbent sheet 3, a back sheet 52 arranged on the back side of the absorbent sheet 3, and an absorbent 53 arranged between the top sheet 51 and the back sheet 52. The top sheet 51 is liquid permeable and is formed in a substantially rectangular shape. The top sheet 51 is made of a resin film having a large number of openings 51a penetrating the top sheet 51 in the thickness direction. Typically, polyethylene or polypropylene is used as the material for the resin film. The top sheet 51 may be made of a laminate in which a nonwoven fabric is bonded to a resin film, or a water-repellent nonwoven fabric. Pet urine excreted on the absorbent sheet 3 moves to the absorbent 53 side through the openings 51a formed in the top sheet 51.

[0055] The back sheet 52 is water impermeable and formed in a generally rectangular shape with substantially the same dimensions as the top sheet 51. Examples of materials for the back sheet 52 include a resin film such as polyethylene or polypropylene, a laminate in which a nonwoven fabric is bonded to the resin film, or a water-repellent nonwoven fabric. By disposing the liquid impermeable back sheet 52 on the back side of the absorbent sheet 3, urine excreted on the absorbent sheet 3 is prevented from leaking to the back side.

[0056] The absorbent 53 is disposed between the top sheet 51 and the back sheet 52, and absorbs urine that has passed through the top sheet 51. The absorbent 53 has a substantially rectangular planar shape, is slightly smaller than the top sheet 51 and the back sheet 52, and is disposed in the center of the absorbent sheet 3. Therefore, as shown in FIG. 11, the absorbent sheet 3 has an absorbent section 3a in which the absorbent 53 is disposed between the top sheet 51 and the back sheet 52, and a flap section 3b in which the absorbent 53 is not disposed between the top sheet 51 and the back sheet 52. The absorbent section 3a is a substantially rectangular area disposed in the center of the absorbent 53 when viewed from the thickness direction, and is partially bonded to the top sheet 51 by the hot melt adhesive HM. The flap section 3b is a rectangular frame-shaped area in which the top sheet 51 and the back sheet 52 are bonded together without the absorbent 53, and is formed so as to surround the absorbent section 3a. That is, the flap section 3b is formed along the outer edge of the absorbent sheet 3. Typically, as shown in FIG. 12, in the flap portion 3b, the top sheet 51 and the back sheet 52 are directly bonded together by the hot melt adhesive HM without the absorbent body 53 therebetween.

[0057] The absorbent body 53 includes an absorbent core 54 containing pulp and a superabsorbent polymer (SAP), and a core wrap 55 covering the surface of the absorbent core. For example, chemical pulp, cellulose fiber, rayon, acetate, or other cellulose fiber is used as the pulp of the absorbent core 54. For example, starch-, acrylic acid-, or amino acid-based particulate or fibrous polymer is used as the SAP. The core wrap 55 is wrapped around the absorbent core 54 so as to cover at least a portion of the surface of the absorbent core 54.

[0058] The absorbent sheet 3 may further include a cover sheet 56. The cover sheet 56 is disposed between the top sheet 51 and the absorbent core 54, and covers the surface of the absorbent core 54. The cover sheet 56 has a generally rectangular planar shape, and has substantially the same dimensions as the absorbent body 53 when viewed in the thickness direction. The cover sheet 56 is made of, for example, tissue or nonwoven fabric, and is liquid permeable.

[0059] The absorbent sheet 3 is disposed between the bottom plate 11 and the middle frame 12 of the toilet body 2. When the bottom plate 11 and the middle frame 12 are connected via the absorbent sheet 3, as shown in Fig. 4, the flap portions 3b of the absorbent sheet 3 are sandwiched between the fitting recesses 27 and the fitting protrusions 33, and are held between the bottom plate 11 and the middle frame 12. By sandwiching the flap portions 3b of the absorbent sheet 3, the absorber 53 is prevented from breaking and SAP from leaking from the absorbent sheet 3.

[0060] The water-permeable mat 4 is a thin sheet having a porous structure and water permeability. The water-permeable mat 4 is held between the middle frame part 12 and the upper frame part 13 of the toilet body 2, and is placed on the absorbent sheet 3 when used. The water-permeable mat 4 has a function of preventing urine from flowing back from the absorbent sheet 3 while allowing pet urine to pass through. The water-permeable mat 4 is made of a foamed resin having an open cell structure (open cell structure), such as a urethane resin. Since urethane resin has high water resistance, by making the water-permeable mat 4 from a urethane resin, it becomes possible to repeatedly use the water-permeable mat 4 without replacing it. For example, an ether-based urethane resin having high tensile strength is used as the urethane resin.

[0061] Fig. 13 is a plan view showing an enlarged portion of the water-permeable mat 4 according to one embodiment. As shown in Fig. 13, the water-permeable mat 4 has a large number of pores 4a penetrating the water-permeable mat 4 in the thickness direction. The water-permeable mat 4 may have 8 to 20 pores 4a per square inch when viewed in the thickness direction. By setting the number of pores 4a per square inch to 8 to 20, the water-permeable mat 4 can ensure liquid permeability while maintaining its rigidity. The opening shape of the pores 4a may have any planar shape, such as a circle, an ellipse, or a polygon.

[0062] As shown in FIG. 2, the water-permeable mat 4 is placed on the absorbent sheet 3 when in use. When no load is applied to the water-permeable mat 4, the water-permeable mat 4 may be placed away from the absorbent sheet 3. A pet using the system toilet 1 sits on the water-permeable mat 4 to urinate. The pet's urine passes through many holes formed in the water-permeable mat 4 and moves to the absorbent sheet 3, where it is absorbed. At this time, the water-permeable mat 4 prevents the pet's legs from coming into contact with the absorbent sheet 3, and therefore prevents the urine absorbed by the absorbent sheet from flowing back up to the pet's legs.

[0063] Next, a procedure for attaching the absorbent sheet 3 and the water-permeable mat 4 to the toilet body 2 will be described. First, the latches 38 of the middle frame portion 12 are pushed outward in the width direction X by hand to disengage the latches 38 from the connection portions 28 of the bottom plate portion 11. Then, the middle frame portion 12 is lifted and removed from the bottom plate portion 11. Next, the absorbent sheet 3 is placed on the bottom plate portion 11 so that the flap portions 3b of the absorbent sheet 3 are positioned on the outer edge portion 22 of the bottom plate portion 11. Next, the fitting protrusions 33 of the middle frame portion 12 are fitted into the fitting recesses 27 of the bottom plate portion 11, and the middle frame portion 12 is attached to the bottom plate portion 11. As a result, the flap portions 3b of the absorbent sheet 3 are sandwiched between the fitting recesses 27 and the fitting protrusions 33. At this time, the absorbent sheet 3 is pressed against the fitting protrusions 33 while deeply inserted into the fitting recesses 27, so that a strong frictional force acts on the absorbent sheet 3, and the absorbent sheet 3 is held firmly in place.

[0064] Next, the latches 46 of the upper frame portion 13 are pushed outward in the width direction X to release the engagement between the latches 46 and the latches 38 of the middle frame portion 12. Then, the upper frame portion 13 is lifted and removed from the middle frame portion 12. Next, the water-permeable mat 4 is placed on the middle frame portion 12, and the fitting convex portion 44 of the upper frame portion 13 is fitted into the fitting recessed portion 34 of the middle frame portion 12 to attach the upper frame portion 13 to the middle frame portion 12. As a result, the outer edge of the water-permeable mat 4 is sandwiched between the fitting recessed portion 34 and the fitting convex portion 44. At this time, the water-permeable mat 4 is pressed by the fitting convex portion 44 in a state where it is deeply inserted into the fitting recessed portion 36, so that a strong frictional force acts on the water-permeable mat 4, and the water-permeable mat 4 is firmly held. In particular, since the maximum length of the fitting protrusion 44 is longer than the maximum length of the fitting protrusion 33, the holding force of the upper fitting structure 20 for the water-permeable mat 4 is greater than the holding force of the lower fitting structure 10 for the absorbent sheet 3.

[0065] In addition, the water-permeable mat 4 is pressed downward by the inner peripheral convex portion 43. As a result, frictional force acts between the water-permeable mat 4 and the inner peripheral convex portion 43, and the holding force of the water-permeable mat 4 is further increased.

[0066] When the absorbent sheet 3 and water-permeable mat 4 are attached to the toilet body 2, the system toilet 1 is ready for use. When using the system toilet 1, a pet straddles the relatively narrow second upper frame side 13B and climbs onto the water-permeable mat 4 to urinate. The pet's urine passes through the water-permeable mat 4 and is absorbed by the absorbent sheet 3. After urinating, the pet climbs down from the system toilet 1 by straddling the second upper frame side 13B.

[0067] The absorbent sheet 3 has a high water retention capacity and can be used multiple times. For example, the absorbent sheet 3 can absorb a pet's urine for three days. Since the water-permeable mat 4 is placed on the absorbent sheet 3, the urine absorbed by the absorbent sheet 3 is prevented from flowing back up into the pet's legs even when the absorbent sheet 3 is used repeatedly.

[0068] Next, the procedure for replacing the absorbent sheet 3 will be described. When the pet urinates multiple times and the absorbent sheet 3 needs to be replaced, the latches 38 of the middle frame portion 12 are pushed outward in the width direction X by hand to release the engagement between the latches 38 and the connection portion 28 of the bottom plate portion 11. Then, the middle frame portion 12 is lifted and removed from the bottom plate portion 11. Next, the used absorbent sheet 3 is replaced with a new absorbent sheet 3, and the middle frame portion 12 is reattached to the bottom plate portion 11. In this way, the user can replace the absorbent sheet 3 without directly touching the water-permeable mat 4. Therefore, the absorbent sheet 3 can be replaced without getting hands dirty.

[0069] When replacing the water-permeable mat 4, the water-permeable mat 4 can be removed and replaced individually from the system toilet 1 by removing the upper frame part 13 from the middle frame part 12 in the reverse order to that for attaching the water-permeable mat 4.

[0070] As described above, in the toilet body 2, the absorbent sheet 3 is disposed between the bottom plate portion 11 and the middle frame portion 12, and the water-permeable mat 4 is disposed between the middle frame portion 12 and the upper frame portion 13. The absorbent sheet 3 is sandwiched between the bottom plate portion 11 and the middle frame portion 12 by the engagement between the engagement convex portion 33 and the engagement concave portion 27, and the water-permeable mat 4 is sandwiched between the middle frame portion 12 and the upper frame portion 13 by the engagement between the engagement convex portion 44 and the engagement concave portion 34. Therefore, it is possible to suppress the displacement of the absorbent sheet 3 and the water-permeable mat 4. In addition, by releasing the engagement between the engagement convex portion 33 and the engagement concave portion 27, it is possible to individually replace the absorbent sheet 3 or the water-permeable mat 4 from the toilet body 2. Therefore, it is easy to replace the absorbent sheet 3 and the water-permeable mat 4, and the maintainability of the toilet body 2 can be improved.

[0071] Next, a toilet body according to another embodiment will be described. Fig. 14 is a perspective view showing a toilet body 2A according to another embodiment. Below, differences from the toilet body 2 described above will be mainly described, and overlapping descriptions will be omitted.

[0072] As shown in Fig. 14, the upper frame portion 13 of the toilet body A has a pair of first upper frame sides 13A extending in the width direction X and a pair of second upper frame sides 13B extending in the depth direction Y. The length of the pair of first upper frame sides 13A in the width direction X is longer than the length of the pair of second upper frame sides 13B in the depth direction Y. The width of the pair of first upper frame sides 13A in the depth direction Y is smaller than the width of the pair of second upper frame sides 13B in the width direction X.

[0073] In addition, in the toilet body 2A, a plurality of buckles 50 are provided on a pair of first upper frame sides 13A and a pair of second upper frame sides 13B of the upper frame part 13. The buckles 50 provided on the pair of first upper frame sides 13A are rotatable around a rotation axis extending in the width direction X, and the buckles 50 provided on the pair of second upper frame sides 13B are rotatable around a rotation axis extending in the depth direction Y. When the plurality of buckles 50 are rotated around the rotation axis and pressed against the middle frame part 12, the locking protrusions formed on the tips of the plurality of buckles 50 engage with the outer peripheral protrusions 35 of the middle frame part 12, locking (fixing) the upper frame part 13 to the middle frame part 12. On the other hand, the plurality of buckles 50 are pulled up and the locking protrusions of the buckles 50 are removed from the outer peripheral protrusions 35 of the middle frame part 12 to release the lock, and the upper frame part 13 can be removed from the middle frame part 12. FIG. 15 is a side view showing the toilet body 2A in which the upper frame portion 13 is fixed to the middle frame portion 12 by a plurality of buckles 50. As shown in FIG.

[0074] As described above, the toilet body 2A is provided with a plurality of buckles 50, thereby enabling the upper frame portion 13 to be securely fixed to the middle frame portion 12. The plurality of buckles 50 constitute a locking device that fixes the upper frame portion 13 to the middle frame portion 12.

[0075] Although the pet toilet body 2, 2A and the pet toilet system 1 according to various embodiments have been described above, the present invention is not limited to the above-mentioned embodiments and various modifications can be made without departing from the spirit of the invention. In other words, it should be noted that the above-mentioned embodiments are intended as illustrative examples and do not limit the scope of the present invention.

[0076] For example, in the above-mentioned toilet body 2, the bottom plate portion 11 is formed with the fitting recess 27, and the middle frame portion 12 is formed with the fitting protrusion 33, but the bottom plate portion 11 may be formed with an engagement protrusion, the middle frame portion 12 may be formed with a fitting recess, and these engagement protrusions and fitting recesses may be fitted together to connect the middle frame portion 12 to the bottom plate portion 11. Similarly, in the above-mentioned toilet body 2, the middle frame portion 12 is formed with the fitting recess 34, and the upper frame portion 13 is formed with the fitting protrusion 44, but the middle frame portion 12 is formed with an engagement protrusion, the upper frame portion 13 is formed with a fitting recess, and these engagement protrusions and fitting recesses may be fitted together to connect the upper frame portion 13 to the middle frame portion 12.

[0077] In addition, in the above-mentioned toilet body 2, the fitting recess 27, the fitting protrusion 33, the fitting recess 34, and the fitting protrusion 44 are formed in a rectangular shape when viewed from the vertical direction Z, but the shapes of the fitting recess 27, the fitting protrusion 33, the fitting recess 34, and the fitting protrusion 44 are not limited to a rectangular shape. For example, the fitting protrusion 33 and the fitting protrusion 44 may be cylindrical pins, and the fitting recess 27 and the fitting recess 34 may be holes having a circular planar shape that fits into these pins. These fitting recesses 27, the fitting protrusion 33, the fitting recess 34, and the fitting protrusion 44 may be arranged in multiple numbers along the periphery of the bottom plate portion 11, the middle frame portion 12, and the upper frame portion 13, and the fitting protrusion 33 and the fitting protrusion 44 may fit into the fitting recess 27 and the fitting recess 34, respectively, so that the middle frame portion 12 is attached to the bottom plate portion 11 and the upper frame portion 13 is attached to the middle frame portion 12.

[0078] In the above-described toilet body 2, the length in the width direction X of the pair of first middle frame sides 12A is longer than the length in the depth direction Y of the pair of second middle frame sides 12B, but the length in the width direction X of the pair of first middle frame sides 12A may be shorter than the length in the depth direction Y of the pair of second middle frame sides 12B.

[0079] The present disclosure includes the following:

[0080] [1] A bottom plate portion having a bottom surface portion and an outer edge portion surrounding the bottom surface portion; A middle frame portion disposed on the outer edge portion of the bottom plate portion; An upper frame portion disposed on the middle frame portion; Equipped with the bottom plate portion and the middle frame portion have a lower fitting structure including a first fitting protrusion formed on one of the bottom plate portion and the middle frame portion and a first fitting recess formed on the other of the bottom plate portion and the middle frame portion, and restricting relative movement between the bottom plate portion and the middle frame portion by fitting the first fitting protrusion and the first fitting recess, The pet toilet body has an upper fitting structure in which the middle frame portion and the upper frame portion include a second fitting convex portion formed on one of the middle frame portion and the upper frame portion and a second fitting recess portion formed on the other of the middle frame portion and the upper frame portion, and the second fitting convex portion and the second fitting recess portion are fitted together to restrict relative movement between the middle frame portion and the upper frame portion.

[0081] [2] The pet toilet body described in [1], wherein the middle frame portion and the upper frame portion are made of flexible resin.

[0082] [3] The bottom plate portion includes the first fitting recess, the middle frame portion includes the first fitting protrusion portion protruding toward the first fitting recess portion and the second fitting recess portion, The pet toilet body described in [1] or [2], wherein the upper frame portion includes the second mating protrusion portion that protrudes toward the second mating recess portion.

[0083] [4] A pet toilet body described in any one of [1] to [3], wherein in the stacking direction of the bottom plate portion, the middle frame portion and the upper frame portion, the maximum length of the second fitting protrusion is longer than the maximum length of the first fitting protrusion.

[0084] [5] The upper frame portion further includes an inner peripheral convex portion formed along an inner edge of the upper frame portion and protruding toward the bottom plate portion, The pet toilet body according to any one of [1] to [4], wherein a tip of the inner peripheral convex portion is disposed closer to the bottom plate portion than a tip of the second fitting convex portion.

[0085] [6] The pet toilet body according to any one of [1] to [5], wherein the upper surface of the bottom portion has an uneven shape.

[0086] [7] The upper frame portion has a pair of first upper frame sides extending in the first direction and a pair of second upper frame sides extending in a second direction perpendicular to the first direction, and the width of the pair of first upper frame sides in the second direction is smaller than the width of the pair of second upper frame sides in the first direction. The toilet body for pets according to any one of [1] to [6].

[0087] [8] The upper surface of the upper frame portion is inclined so as to approach the bottom plate portion as it approaches the inner edge of the upper frame portion. The toilet body for pets according to any one of [1] to [7].

[0088] [9] The inclination angle of the upper surface of the upper frame portion increases as it approaches the inner edge of the upper frame portion. The toilet body for pets according to [8].

[0089]

[10] The upper surfaces of the pair of first upper frame sides have an uneven shape in which concave portions and convex portions are alternately arranged in the first direction. The upper surfaces of the pair of second upper frame sides have an uneven shape in which concave portions and convex portions are alternately arranged in the second direction. The toilet body for pets according to [7].

[0090]

[11] The concave portions of the pair of first upper frame sides and the pair of second upper frame sides have inclined surfaces that are curved so as to approach the middle frame portion as they move away from the adjacent convex portions. The toilet body for pets according to

[10] .

[0091]

[12] The upper frame portion has a first locking structure for locking the upper frame portion to the middle frame portion. The toilet body for pets according to any one of [1] to

[11] .

[0092]

[13] The middle frame portion has a second locking structure for locking the middle frame portion to the bottom plate portion. The toilet body for pets according to any one of [1] to

[12] .

[0093]

[14] A toilet body described in any one of [1] to

[13] , further comprising a locking device provided on the pair of first upper frame sides and the pair of second upper frame sides for fixing the upper frame portion to the middle frame portion.

[0094]

[15] A bottom plate portion having a bottom surface portion and an outer edge portion surrounding the bottom surface portion; A middle frame portion disposed on the outer edge portion of the bottom plate portion; An upper frame portion disposed on the middle frame portion; an absorbent sheet having water absorbency and disposed between the bottom plate portion and the inner frame portion; A water-permeable mat having a porous structure disposed between the middle frame portion and the upper frame portion; Equipped with the bottom plate portion and the middle frame portion have a first fitting protrusion formed on one of the bottom plate portion and the middle frame portion, and a first fitting recess formed on the other of the bottom plate portion and the middle frame portion, and have a lower fitting structure that holds the absorbent sheet by fitting the first fitting protrusion and the first fitting recess, The middle frame portion and the upper frame portion include a second mating convex portion formed on one of the middle frame portion and the upper frame portion and a second mating recess portion formed on the other of the middle frame portion and the upper frame portion, and the pet system toilet has an upper mating structure that holds the water-permeable mat by mating between the second mating convex portion and the second mating recess.

[0095]

[16] A system toilet for pets as described in

[15] , wherein the holding force of the permeable mat by the upper fitting structure is greater than the holding force of the absorbent sheet by the lower fitting structure. [Explanation of symbols]

[0096] 1... Pet system toilet, 2... Toilet body for pets, 3... Absorbent sheet, 4... Water-permeable mat, 10... Lower fitting structure, 20... Upper fitting structure, 11... Bottom plate part, 12... Middle frame part, 13... Upper frame part, 21... Bottom face part, 22... Outer edge part, 23, 47... Upper surface, 23a... Concave part, 23b... Convex part, 27... Fitting concave part (first fitting concave part), 33... Fitting convex part (first fitting convex part), 34... Fitting concave part (second fitting concave part), 38... Latch (second locking structure), 43... Inner peripheral convex part, 44... Fitting convex part (second fitting convex part), 46... Latch (first locking structure), 48... Raised part (convex part), 49... Inclined surface (concave part).

Claims

1. A bottom plate portion having a bottom surface portion and an outer edge portion surrounding the bottom surface portion; A middle frame portion disposed on the outer edge portion of the bottom plate portion; An upper frame portion disposed on the middle frame portion; Equipped with the bottom plate portion and the middle frame portion have a lower fitting structure including a first fitting protrusion formed on one of the bottom plate portion and the middle frame portion and a first fitting recess formed on the other of the bottom plate portion and the middle frame portion, and restricting relative movement between the bottom plate portion and the middle frame portion by fitting the first fitting protrusion and the first fitting recess, The pet toilet body has an upper fitting structure in which the middle frame portion and the upper frame portion include a second fitting convex portion formed on one of the middle frame portion and the upper frame portion and a second fitting recess portion formed on the other of the middle frame portion and the upper frame portion, and the second fitting convex portion and the second fitting recess portion are fitted together to restrict relative movement between the middle frame portion and the upper frame portion.

2. The pet toilet body according to claim 1 , wherein the middle frame portion and the upper frame portion are made of a flexible resin.

3. the bottom plate portion includes the first fitting recess, the middle frame portion includes the first fitting protrusion protruding toward the first fitting recess and the second fitting recess, The pet toilet body according to claim 1 , wherein the upper frame portion includes the second fitting protrusion portion that protrudes toward the second fitting recess portion.

4. The pet toilet body according to claim 3 , wherein a maximum length of the second fitting protrusion is longer than a maximum length of the first fitting protrusion in a stacking direction of the bottom plate portion, the middle frame portion and the upper frame portion.

5. The upper frame portion further includes an inner peripheral convex portion formed along an inner edge of the upper frame portion and protruding toward the bottom plate portion, The pet toilet body according to claim 3 , wherein a tip of the inner peripheral convex portion is disposed closer to the bottom plate portion than a tip of the second fitting convex portion.

6. The pet toilet body according to claim 1 , wherein the upper surface of the bottom portion has an uneven shape.

7. The pet toilet body of claim 1, wherein the upper frame portion has a pair of first upper frame sides extending in a first direction and a pair of second upper frame sides extending in a second direction perpendicular to the first direction, and the width of the pair of first upper frame sides in the second direction is smaller than the width of the pair of second upper frame sides in the first direction.

8. The pet toilet body according to claim 1 , wherein the upper surface of the upper frame portion is inclined so as to approach the bottom plate portion toward an inner edge of the upper frame portion.

9. The pet toilet body according to claim 8 , wherein an inclination angle of the upper surface of the upper frame portion increases toward an inner edge of the upper frame portion.

10. The upper surfaces of the pair of first upper frame sides have an uneven shape in which recesses and protrusions are alternately arranged in the first direction, The pet toilet body according to claim 7 , wherein the upper surfaces of the pair of second upper frame sides have an uneven shape in which recesses and protrusions are alternately arranged in the second direction.

11. The pet toilet body according to claim 10, wherein the recesses of the pair of first upper frame sides and the pair of second upper frame sides have inclined surfaces that are curved so as to approach the middle frame portion as they move away from the adjacent protrusions.

12. The pet toilet body according to claim 1 , wherein the upper frame portion has a first locking structure that locks the upper frame portion to the middle frame portion.

13. The pet toilet body according to claim 12, wherein the inner frame portion has a second locking structure that locks the inner frame portion to the bottom plate portion.

14. The toilet body according to claim 7 , further comprising a locking device provided on the pair of first upper frame sides and the pair of second upper frame sides for fixing the upper frame portion to the middle frame portion.

15. A bottom plate portion having a bottom surface portion and an outer edge portion surrounding the bottom surface portion; A middle frame portion disposed on the outer edge portion of the bottom plate portion; An upper frame portion disposed on the middle frame portion; an absorbent sheet having water absorbency and disposed between the bottom plate portion and the inner frame portion; A water-permeable mat having a porous structure disposed between the middle frame portion and the upper frame portion; Equipped with the bottom plate portion and the middle frame portion have a first fitting protrusion formed on one of the bottom plate portion and the middle frame portion, and a first fitting recess formed on the other of the bottom plate portion and the middle frame portion, and have a lower fitting structure that holds the absorbent sheet by fitting the first fitting protrusion and the first fitting recess, The middle frame portion and the upper frame portion include a second mating convex portion formed on one of the middle frame portion and the upper frame portion and a second mating recess portion formed on the other of the middle frame portion and the upper frame portion, and the pet system toilet has an upper mating structure that holds the water-permeable mat by mating between the second mating convex portion and the second mating recess.

16. The system pet toilet according to claim 15, wherein the upper fitting structure holds the water-permeable mat with a greater force than the lower fitting structure holds the absorbent sheet with a greater force.

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