Animal toilet

Abstract

An animal toilet is provided in which it is not easy for the odor of urine accumulated in the lower space to rise to the upper space. The animal toilet (1) includes a partition (20), an upper space (S1), and a lower space (S2). The partition (20) has a through hole (22) for urine to pass through. The upper space (S1) exists above the partition (20) and is a space in which a plurality of granular bodies (30) are arranged. The lower space (S2) exists below the partition (20) and is a space for urine that has passed through the through hole (22) to accumulate. The partition (20) has a wall (24). The wall (24) is provided around the through hole (22) on the lower surface of the partition (20) and protrudes toward the lower space (S2).

Description

Technical Field

[0001] The present invention relates to animal litter boxes. Background Art

[0002] As a conventional animal toilet, there is a toilet described in Patent Document 1, for example. The animal toilet described in the document has a partition (grid), an upper space, and a lower space. A through hole for urine to pass through is formed in the partition. The upper space is a portion of the space in a box-shaped container (tray) that exists above the partition. A plurality of granular bodies with low water absorption are arranged in the upper space. The lower space is a portion of the space in the container that exists below the partition. An absorbent sheet for absorbing urine is arranged in the lower space.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2003-180182 Summary of the invention

[0006] Problems to be solved by the invention

[0007] In the above-mentioned animal toilet, urine excreted on the granules passes through the gaps between the granules and then moves from the upper space to the lower space through the through holes of the partition. The urine moved to the lower space is absorbed by the absorbent sheet and accumulates in the lower space. When a bad smell is generated from the urine accumulated in the lower space, the bad smell may rise to the upper space through the through holes. This causes the bad smell to float outside the animal toilet.

[0008] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an animal litter box in which the odor of urine accumulated in the lower space is unlikely to rise to the upper space.

[0009] Means for solving problems

[0010] The animal toilet of the present invention is characterized in that the animal toilet comprises: a partition having a through hole for passing urine; an upper space located above the partition and provided with a plurality of granular bodies; and a lower space located below the partition for storing the urine that has passed through the through hole, wherein the partition has a wall portion that is provided around the through hole on the lower surface of the partition and protrudes toward the lower space.

[0011] In the animal toilet, a wall portion protruding from the lower surface of the partition portion toward the lower space is provided around the through hole. Thus, even if a foul odor is generated from urine accumulated in the lower space, at least a part of the foul odor can be blocked by the wall portion. Therefore, compared with a case where the wall portion is not provided, it is difficult for the foul odor to flow into the through hole.

[0012] Effects of the Invention

[0013] According to the present invention, it is possible to realize an animal litter box in which the odor of urine accumulated in the lower space is unlikely to rise to the upper space. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an end view showing one embodiment of the animal litter box of the present invention.

[0015] Figure 2 1 is an end view showing the container 10 .

[0016] Figure 3 1 is a front view showing the container 10 .

[0017] Figure 4 1 is a plan view showing the container 10 .

[0018] Figure 5 It is a perspective view showing the drawer 14 .

[0019] Figure 6 2 is a plan view showing the partition 20 .

[0020] Figure 7 It is a bottom view showing the partition portion 20 .

[0021] Figure 8 It is along Figure 6 End view of line VIII-VIII.

[0022] Fig. 9 It is along Figure 6 End view of the IX-IX line.

[0023] Fig.10 It is used to illustrate Figure 1 End view of the effect of using a toilet for animals.

[0024] Fig.11 It is used to illustrate Figure 1 End view of the effect of using a toilet for animals.

[0025] Fig.12 This is an end view for explaining a modified example of the wall portion 24 .

[0026] Fig.13 It is shown Fig.12A top view of the through hole 22 and the wall portion 24 is shown.

[0027] Fig.14 It is an end view for explaining another modified example of the wall portion 24 .

[0028] Fig.15 It is a bottom view for explaining another modified example of the wall portion 24 .

[0029] Fig.16 It is used to illustrate Figure 1 An end view of a modified example of an animal toilet. DETAILED DESCRIPTION

[0030] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and repeated descriptions are omitted.

[0031] Figure 1 1 is an end view showing an embodiment of an animal litter box of the present invention. The schematic structure of the animal litter box 1 is described with reference to this figure. The animal litter box 1 includes a container 10, a pull-out portion 14, a partition 20, a plurality of granular bodies 30, and a water-absorbent sheet 40. The container 10 is in a box shape having a bottom portion 10a and a side portion 10b. In this embodiment, the container 10 is in a substantially rectangular parallelepiped shape. As a material of the container 10, for example, plastic such as polypropylene and polyethylene can be used.

[0032] The container 10 has an extension portion 10c provided so as to extend from the side portion 10b toward the inner side of the container 10. The extension portion 10c may be a protrusion or a ridge. The extension portion 10c may be integrally formed with the side portion 10b, or may be separately formed from the side portion 10b and then attached to the side portion 10b. The extension length of the extension portion 10c (the length in a direction perpendicular to the inner surface of the side portion 10b on which the extension portion 10c is provided) is, for example, not less than 5 mm and not more than 15 mm.

[0033] The drawer 14 can be inserted and removed from the container 10 through the opening 12 formed in the side surface 10b. The water-absorbent sheet 40 is accommodated in the drawer 14. As a material of the drawer 14, for example, plastic such as polypropylene and polyethylene can be used.

[0034] The partition 20 is placed on the extension 10c. The partition 20 is not fixed to the container 10. The partition 20 can be attached to and detached from the container 10. The partition 20 is generally plate-shaped and is arranged parallel to the bottom surface 10a. The partition 20 has a through hole 22 for urine to pass through. The partition 20 is provided at a position away from both the water-absorbent sheet 40 and the upper end of the container 10. Thus, the partition 20 divides the container 10 into upper and lower parts. That is, the partition 20 is arranged in a manner that divides the internal space of the container 10 into an upper space S1 and a lower space S2. The upper space S1 exists above the partition 20 and is a space for arranging a plurality of granular bodies 30. The lower space S2 exists below the partition 20 and is a space for storing urine that has passed through the through hole 22. In this way, the animal litter box 1 includes the upper space S1 and the lower space S2 divided by the partition 20. As a material for the partition 20, for example, plastics such as polypropylene and polyethylene can be used.

[0035] The upper space S1 is provided with a plurality of granules 30 for treating excrement (urine). The plurality of granules 30 are arranged in the upper space S1 in a state of being laid on the partition 20. When the animal litter box 1 is used, the granules 30 directly receive the excreted urine. The granules 30 are hydrophobic. That is, the granules 30 have a property of not absorbing liquid such as urine at all, or absorbing almost nothing even if absorbing.

[0036] In order to make the granules 30 hydrophobic, the hydrophobicity measured by the following test needs to be 80% or more. First, put the granules 30 (sample) equivalent to 50g in a sieve with an inner diameter of 10cm and a mesh of 1mm. Set an empty beaker under the sieve. Then, for the sample, use a syringe with an inner diameter of 3cm in the outer cylinder and an inner diameter of 4mm at the front end of the cylinder (60ml syringe made by Terumo) to drip 30ml of water in 10 seconds. After standing for 1 minute, measure the amount of water in the beaker. The ratio of the measured amount of water to the amount of water dripped (30ml) is used as the hydrophobicity. That is, if the amount of water in the beaker is more than 24ml, the hydrophobicity is more than 80%, so it can be said that the granules 30 are hydrophobic. For reference, the hydrophobicity of general water-absorbent cat litter available on the market is about 5%.

[0037] The granules 30 are formed into granules. Examples of the shape of the granules include spheres, cylinders, and ellipsoids. The particle size of the granules 30 is, for example, greater than 5 mm and less than 20 mm. Here, the particle size is defined as the diameter of the smallest sphere that can contain the granules 30. The granules 30 preferably use organic matter as the main material. Here, the main material refers to the material that has the largest weight proportion in the granules 30 among one or more materials constituting the granules 30. As the organic matter, for example, paper, tea dregs, plastics, or bean dregs can be used.

[0038] Paper refers to a material mainly composed of pulp. Examples of paper include ordinary paper, vinyl chloride wallpaper graded products, photographic paper, peeling paper, fluff pulp, papermaking sludge, pulp sludge, and the like. Vinyl chloride wallpaper graded products are obtained by removing a portion of polyvinyl chloride from vinyl chloride wallpaper containing paper and polyvinyl chloride. Examples of plastics include ordinary plastics, aluminum vapor-deposited films, diaper graded products (plastics obtained by grading diapers), and the like. Okara is preferably dried okara. These materials may also be subjected to a hydrophobic treatment.

[0039] The material constituting the granular body 30 may be only one or may be two or more. In the former case, the material constituting the granular body 30 is only the above-mentioned main material. In the latter case, the granular body 30 is composed of a mixture of the main material and other materials. As other materials, gypsum can be cited, for example. By adding gypsum, the hydrophobicity of the granular body 30 can be improved. The amount of gypsum is, for example, 5% by weight or more and 15% by weight or less relative to the whole granular body 30.

[0040] The granules 30 can be manufactured, for example, by the following method. First, the granulated material (the material constituting the granules 30) is granulated by using a granulating device to form granules that become the granules 30. As the granulating device, for example, an extrusion granulator can be used. The granules can be subjected to a hydrophobic treatment as needed. The hydrophobic treatment can be performed, for example, by coating the surface of the granules with a hydrophobic agent. In the case where no hydrophobic treatment is performed, it is preferred to increase the pressure applied to the granulated material during granulation so as not to generate gaps in the granules as much as possible. This is because the gaps become a path for water such as urine to penetrate into the interior of the granules 30. Before granulation, the granulated material is subjected to pre-treatments such as pulverization, kneading, and water addition as needed. In addition, after granulation, post-treatments such as screening (granulation) and drying are performed as needed.

[0041] The absorbent sheet 40 is disposed in the lower space S2. In the present embodiment, the absorbent sheet 40 is disposed in the lower space S2 in a state of being accommodated in the pull-out portion 14. The absorbent sheet 40 absorbs urine that has passed through the through holes 22 of the partition 20. That is, urine that has passed through the through holes 22 is stored in the lower space S2 in a state of being absorbed by the absorbent sheet 40.

[0042] When the animal litter box 1 is used, urine excreted on the granules 30 flows downward through the gaps between the granules 30. The urine moves from the upper space S1 to the lower space S2 through the through holes 22 of the partition 20 and is absorbed by the absorbent sheet 40.

[0043] Below, refer to Figure 2-Figure 9 The structure of each part of the animal litter box 1 will be described in detail. Figure 2 , Figure 3 as well as Figure 4They are respectively an end view, a front view and a top view of the container 10. Figure 2 and Figure 3 As shown, an opening 12 for inserting and removing the pull-out portion 14 is formed on the side surface 10b of the container 10. The opening 12 is located near the bottom surface 10a and is in a horizontally long rectangular shape. Figure 3 The length of the opening 12 in the longitudinal direction (in the left-right direction) is substantially equal to the lateral width of the inner side of the container 10, for example, not less than 20 cm and not more than 40 cm. Figure 3 The length of the vertical direction is, for example, 2 cm or more and 5 cm or less. Figure 4 As shown, in the present embodiment, the extension portion 10c is composed of a protrusion provided in an annular shape over the entire circumference of the inner surface of the side surface portion 10b in a plan view.

[0044] Figure 5 1 is a perspective view showing the pull-out portion 14. The pull-out portion 14 includes a bottom plate 14a, a front plate 14b, a front plate 14c, and a pair of side plates 14d. The size of the bottom plate 14a is substantially equal to the size of the bottom portion 10a of the container 10. The front plate 14b has substantially the same shape and size as the opening 12. A handle 15 is mounted on the front plate 14b.

[0045] Figure 6 as well as Figure 7 1 and 2 are respectively a top view and a bottom view showing the partition 20. That is, Figure 6 as well as Figure 7 They respectively represent the upper surface (the surface on the upper region S1 side) and the lower surface (the surface on the lower region S2 side) of the partition 20. Figure 8 as well as Fig. 9 Along the Figure 6 The partition 20 is an end view of the line VIII-VIII and the line IX-IX. Figure 6 ) is in a roughly rectangular shape. Here, roughly rectangular is not limited to a rectangle, and also includes shapes close to a rectangle such as a rounded rectangle.

[0046] The partition 20 has a plurality of through holes 22. In the following description, unless otherwise specified, "a plurality of through holes 22" refers to all through holes 22 provided in the partition 20. The plurality of through holes 22 are arranged two-dimensionally in the partition 20. Specifically, the plurality of through holes 22 are arranged along the first direction ( Figure 6 ) and the second direction intersecting with the first direction ( Figure 6 In the present embodiment, the second direction is a direction perpendicular to the first direction. That is, the plurality of through holes 22 are arranged in a square grid. The planar shape of each through hole 22 is circular. Each through hole 22 allows urine to pass through but does not allow the granules 30 to pass through.

[0047] The partition 20 has a wall 24. The wall 24 is provided around the through hole 22 on the lower surface of the partition 20 and protrudes toward the lower space S2. The wall 24 is cylindrical and surrounds the entire periphery of the through hole 22. In the present embodiment, the wall 24 is cylindrical. Therefore, the wall 24 extends downward in the vertical direction from the lower surface of the partition 20. The inner surface of the wall 24 is continuous with the side surface of the through hole 22. Therefore, the inner diameter (diameter in the horizontal direction) of the wall 24 is equal to the diameter d1 of the through hole 22. The lower end of the wall 24 is located below the upper surface of the extension 10c of the container 10. The thickness t1 of the wall 24 is preferably less than 1 / 4 of the diameter d1 of the through hole 22, and more preferably less than 1 / 8. The height h1 of the wall 24 is preferably greater than the thickness t2 of the partition 20. The thickness t2 is equal to the length of the through hole 22.

[0048] The wall portion 24 is provided around each through hole 22. Therefore, as a plurality of through holes 22 are provided, a plurality of wall portions 24 are also provided. The number of wall portions 24 is equal to the number of through holes 22. The plurality of through holes 22 include a through hole 22a (a first through hole) and a through hole 22b (a second through hole). The through hole 22a is any one of the plurality of through holes 22. The through hole 22b is the through hole 22 closest to the through hole 22a among the plurality of through holes 22. The wall portion 24 includes a wall portion 24a (a first wall portion) provided around the through hole 22a and a wall portion 24b (a second wall portion) provided around the through hole 22b. The interval d2 between the wall portion 24a and the wall portion 24b is greater than the thickness t1 of the wall portion 24a and the wall portion 24b. The interval d2 is preferably equal to or greater than 1 / 2 of the interval d3 between the through-hole 22a and the through-hole 22b, and more preferably equal to or greater than 2 / 3.

[0049] The effect of the animal litter box 1 is described. In the animal litter box 1, a wall portion 24 is provided around the through hole 22, protruding from the lower surface of the partition portion 20 toward the lower space S2. Fig.10 As shown, even when a bad smell is generated from urine accumulated in the lower space S2, at least a part of the bad smell 90 can be blocked by the wall portion 24. Therefore, compared with a case where the wall portion 24 is not provided, the bad smell 90 is less likely to flow into the through hole 22. Therefore, the animal litter box 1 is realized in which the bad smell 90 of urine accumulated in the lower space S2 is less likely to rise to the upper space S1.

[0050] The inner surface of the wall portion 24 is continuous with the side surface of the through hole 22. In this case, it is easier to prevent odor from flowing into the through hole 22 than when the inner surface of the wall portion 24 is not continuous with the side surface of the through hole 22, that is, when the wall portion 24 is separated from the through hole 22.

[0051] The wall portion 24 has a cylindrical shape and surrounds the entire periphery of the through hole 22. In this case, compared with the case where the wall portion 24 is provided only around a portion of the periphery of the through hole 22, it is possible to more reliably prevent the odor from flowing into the through hole 22.

[0052] The wall portion 24 has a cylindrical shape. In this case, the wall portion 24 surrounding the entire periphery of the through hole 22 can be realized with a simple structure.

[0053] In addition, if Fig.11 As shown by the middle arrow, the odor 90 reaching the lower end 24c of the wall portion 24 may flow into the through hole 22 along the lower end 24c. Therefore, when the thickness of the wall portion 24 is reduced, the area of ​​the lower end 24c becomes smaller, which is conducive to making it difficult for the odor 90 to flow into the through hole 22. From this point of view, the thickness of the wall portion 24 is preferably less than 1 / 4 of the diameter of the through hole 22, and more preferably less than 1 / 8. On the other hand, if the thickness of the wall portion 24 is too small, the strength of the wall portion 24 may be insufficient. From this point of view, the thickness of the wall portion 24 is preferably more than 1 / 16 of the diameter of the through hole 22.

[0054] Increasing the height of the wall 24 is advantageous in that a large amount of odor is blocked by the wall 24. From this point of view, the height of the wall 24 is preferably greater than the thickness of the partition 20. On the other hand, if the height of the wall 24 is too large, there is a possibility that urine may easily clog the cylindrical wall 24. From this point of view, the height of the wall 24 is preferably 3 times or less of the thickness of the partition 20.

[0055] The partition 20 has a plurality of through holes 22. By providing a plurality of through holes 22, urine can be smoothly moved from the upper space S1 to the lower space S2. In addition, the wall 24 is provided around each through hole 22. Thus, it is possible to prevent odor from flowing into any through hole 22.

[0056] The distance d2 between the wall portion 24a and the wall portion 24b (see Figure 8 as well as Fig. 9 ) is larger than the thickness of each wall portion 24a, 24b. By increasing the interval d2 in this way, it is possible to ensure a larger space for capturing odors. This is conducive to blocking a large amount of odors through the wall portion 24. From this point of view, the interval d2 is preferably more than 1 / 2 of the interval d3 between the through hole 22a and the through hole 22b, and more preferably more than 2 / 3. On the other hand, if the interval d2 is too large, the thickness of the wall portion 24 may become too small. From this point of view, the interval d2 is preferably less than 7 / 8 of the interval d3.

[0057] Each granular body 30 has hydrophobicity. In this case, most of the urine excreted onto the granular body 30 is not absorbed by the granular body 30 but passes through the gaps between the granular bodies 30. Thus, the urine can be smoothly guided to the partition 20.

[0058] When each granular body 30 is mainly made of organic matter, the granular body 30 suitable for incineration can be obtained. If the granular body 30 is suitable for incineration, the used granular body 30 can also be discarded as combustible garbage, so the convenience for the user is improved.

[0059] The animal litter box 1 is provided with a container 10 having an internal space divided into an upper space S1 and a lower space S2 by a partition 20. In this case, the animal litter box 1 having the upper space S1 and the lower space S2 can be realized by using one container (container 10). This contributes to simplifying the structure of the animal litter box 1.

[0060] The partition 20 is not fixed to the container 10. In this case, attachment and detachment of the partition 20 to the container 10 become easy.

[0061] The partition 20 is placed on the extension portion 10 c . Thus, the partition 20 can be left at a predetermined position in the container 10 without being fixed to the container 10 .

[0062] The water-absorbent sheet 40 is disposed in the lower space S2. Thus, urine accumulated in the lower space S2 can be sealed in the water-absorbent sheet 40. Therefore, generation of bad odor caused by the urine can be alleviated.

[0063] The animal litter box 1 is provided with a pull-out portion 14 that can be inserted and pulled out of the container 10. This makes it possible to easily replace the used water-absorbent sheet 40 with a new one.

[0064] The present invention is not limited to the above-mentioned embodiment, and various modifications are possible. In the above-mentioned embodiment, the wall portion 24 extends vertically downward from the lower surface of the partition portion 20. However, for example, Fig.12 As shown, the wall portion 24 may also extend obliquely toward the inner side of the through hole 22 as it moves away from the lower surface of the partition portion 20. In this example, the wall portion 24 is also provided so as to surround the entire periphery of the through hole 22. The opening area of ​​the lower end 24c of the wall portion 24 is smaller than the opening area of ​​the upper end 24d of the wall portion 24. The inner diameter of the wall portion 24 gradually decreases from the upper end 24d toward the lower end 24c. That is, the wall portion 24 is tapered. Fig.13 As shown, the lower end 24 c of the wall portion 24 is located within the through hole 22 in a plan view. Fig.13 Observed from above Fig.12 A top view of the through hole 22 and the wall portion 24 is shown.

[0065] By making the wall 24 inclined in this way, it is easier to prevent odor from flowing into the through hole 22. In addition, when the wall 24 is provided at an inclination, the height h1 of the wall 24 is defined as the distance in the vertical direction from the lower end 24c to the upper end 24d. In addition, the interval d2 between the wall 24a and the wall 24b is defined as the interval between the upper ends of the two.

[0066] In the above embodiment, the case where the inner surface of the wall portion 24 is continuous with the side surface of the through hole 22 is exemplified. Fig.14 As shown, the inner surface of the wall portion 24 may not be continuous with the side surface of the through hole 22 .

[0067] In the above embodiment, the wall portion 24 is provided so as to surround the entire periphery of the through hole 22. However, for example, Fig.15 As shown, the wall portion 24 may be provided only on a portion of the periphery of the through hole 22 . Fig.15 It is a bottom view of the through hole 22 and the wall portion 24 as seen from below.

[0068] In the above embodiment, the through hole 22 is exemplified as having a circular planar shape. However, the through hole 22 may have any planar shape, and may be, for example, a polygon such as a rectangle, or an ellipse.

[0069] In the above embodiment, the case where the pull-out portion 14 is provided is exemplified. However, it is not necessary to provide the pull-out portion 14. When the pull-out portion 14 is not provided, the water-absorbent sheet 40 is directly disposed on the bottom surface portion 10a. In this case, of course, the opening 12 is not provided on the side surface portion 10b.

[0070] In the above embodiment, the case where the water-absorbent sheet 40 is disposed in the lower space S2 is exemplified. However, it is not essential to dispose the water-absorbent sheet 40 in the lower space S2. When the water-absorbent sheet 40 is not disposed, the pull-out portion 14 is not provided.

[0071] In the above embodiment, the upper space S1 and the lower space S2 are constituted by one container 10. However, for example, Fig.16 As shown in FIG. 1 , a container 52 constituting the upper space S1 and a container 54 constituting the lower space S2 may be provided separately. In the figure, each container 52, 54 is in a box shape having a bottom portion and a side portion. The container 52 is stacked on the container 54. And, the bottom portion of the container 52 serves as the partition 20.

[0072] Description of symbols

[0073] 1: animal toilet; 10: container; 10a: bottom portion; 10b: side portion; 10c: extension portion; 12: opening; 14: lead-out portion; 15: handle; 20: partition; 22: through hole; 22a: through hole (first through hole); 22b: through hole (second through hole); 24: wall; 24a: wall (first wall); 24b: wall (second wall); 24c: lower end; 24d: upper end; 30: granular body; 40: absorbent sheet; 52: container; 54: container; S1: upper space; S2: lower space; 90: odor.

Claims

1. A toilet for animals, characterized in that: The animal toilet has: a partition having a through hole for urine to pass through; an upper space, which exists above the partition and is provided with a plurality of granular bodies; and a lower space, which exists below the partition and is used to store the urine that has passed through the through hole; The partition portion includes a wall portion which is provided around the through hole on the lower surface of the partition portion and protrudes toward the lower space side. The height of the wall portion is greater than the thickness of the partition portion. By making the height of the wall portion greater than the thickness of the partition portion, the volume of the space formed by the wall portion and the lower surface of the partition portion is increased, and the space is used to prevent the odor from the urine accumulated in the lower space from rising to the upper space.

2. The animal litter box according to claim 1, wherein: The inner surface of the wall portion is continuous with the side surface of the through hole.

3. The animal litter box according to claim 1 or 2, wherein: The wall portion has a cylindrical shape and surrounds the entire periphery of the through hole.

4. The animal litter box according to claim 3, wherein: The wall portion is cylindrical.

5. The animal litter box according to claim 1 or 2, wherein: The wall portion extends obliquely toward the inside of the through hole as it moves away from the lower surface of the partition portion.

6. The animal litter box according to claim 5, wherein: In a plan view, a lower end of the wall portion is located within the through hole.

7. The animal litter box according to claim 5, wherein: The opening area of ​​the lower end of the wall portion is smaller than the opening area of ​​the upper end of the wall portion.

8. The animal litter box according to claim 7, wherein: An inner diameter of the wall portion gradually decreases from the upper end toward the lower end.

9. The animal litter box according to claim 1 or 2, wherein: The thickness of the wall portion is less than or equal to 1 / 4 of the diameter of the through hole.

10. The animal litter box according to claim 9, wherein: The thickness of the wall portion is 1 / 8 or less of the diameter of the through hole.

11. The animal litter box according to claim 1 or 2, wherein: The partition has a plurality of through holes. The wall portion is disposed around each of the through holes.

12. The animal litter box according to claim 11, wherein: The plurality of through holes include a first through hole and a second through hole closest to the first through hole, The wall portion includes a first wall portion provided around the first through hole and a second wall portion provided around the second through hole.

13. The animal litter box according to claim 12, wherein: The interval between the first wall portion and the second wall portion is larger than the thickness of the first wall portion and the second wall portion.

14. The animal litter box according to claim 12 or 13, wherein: The distance between the first wall portion and the second wall portion is equal to or larger than 1 / 2 of the distance between the first through hole and the second through hole.

15. The animal litter box according to claim 14, wherein: The distance between the first wall portion and the second wall portion is equal to or greater than 2 / 3 of the distance between the first through hole and the second through hole.

16. The animal litter box according to claim 1 or 2, wherein: Each of the granules is hydrophobic.

17. The animal litter box according to claim 16, wherein: Each of the granular bodies is mainly made of organic matter.

18. The animal litter box according to claim 1 or 2, wherein: The animal litter box includes a box-shaped container having a bottom portion and side portions. The partition is configured to divide an inner space of the container into the upper space and the lower space.

19. The animal litter box according to claim 18, wherein: The partition is not fixed to the container.

20. The animal litter box according to claim 19, wherein: The container has a protruding portion provided so as to protrude from the side portion toward the inner side of the container, The partition portion is placed on the extending portion.

21. The animal litter box according to claim 18, wherein: The animal litter box includes a water-absorbent sheet disposed in the lower space and absorbing the urine that has passed through the through-holes.

22. The animal litter box according to claim 21, wherein: The animal toilet has a pull-out portion for storing the water-absorbent sheet. An opening is formed on the side surface of the container, The pull-out portion can be inserted and pulled out relative to the container through the opening.

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