Animal toilet

Abstract

To provide an animal toilet in which odor of urine stored in a lower space is prevented from rising to an upper space.SOLUTION: An animal toilet 1 includes a partition part 20, an upper space S1, and a lower space S2. The partition part 20 has an open hole 22 passing the urine. The upper space S1 exists above the partition part 20 and arranges a plurality of granular bodies 30. The lower space S2 exists below the partition part 20 and stores the urine passing the open hole 22. The partition part 20 has wall parts 24. The wall parts 24 are provided in the surroundings of the open holes 22 on a lower surface of the partition part 20 and protrude to the lower space S2 side.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an animal litter box. [Background technology]

[0002] An example of a conventional animal litter box is described in Patent Document 1. The animal litter box described in this document includes a partition (draft), an upper space, and a lower space. The partition has a through-hole formed in it to allow urine to pass through. The upper space is the portion of the space inside the box-shaped container (tray) that is above the partition. A plurality of granular materials having low water absorption properties are arranged in the upper space. The lower space is the portion of the space inside the container that is below the partition. An absorbent sheet that absorbs urine is arranged in the lower space. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-180182 Summary of the Invention [Problem to be solved by the invention]

[0004] In the animal litter box described above, urine excreted on the granular material passes through the gaps between the granular material and then moves from the upper space to the lower space through the through-holes in the partition. The urine that moves to the lower space is absorbed by the absorbent sheet and accumulates in the lower space. If a foul odor is generated from the urine that accumulates in the lower space, the odor may rise to the upper space through the through-holes. This can cause the foul odor to waft outside the animal litter box.

[0005] The present invention has been made in consideration of the above-mentioned problems, and aims to provide an animal litter box that makes it less likely for the odor of urine that has accumulated in the lower space to rise to the upper space. [Means for solving the problem]

[0006] The animal litter box according to the present invention comprises a partition having a through hole that allows urine to pass through, an upper space above the partition in which a plurality of granular bodies are arranged, and a lower space below the partition in which the urine that has passed through the through hole accumulates, and is characterized in that the partition has a wall portion that protrudes toward the lower space and is provided around the through hole on the underside of the partition.

[0007] In this animal litter box, a wall portion is provided around the through-hole that protrudes from the underside of the partition toward the lower space. This allows the wall portion to block at least a portion of the odor, even if it occurs from urine that has accumulated in the lower space. This makes it more difficult for the odor to flow into the through-hole than if a wall portion were not provided. [Effects of the Invention]

[0008] According to the present invention, an animal litter box is realized that makes it difficult for the odor of urine that has accumulated in the lower space to rise to the upper space. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is an end view showing one embodiment of an animal litter box according to the present invention. FIG. [Figure 2] FIG. 1 is an end view of a container 10. [Figure 3] FIG. 2 is a front view showing the container 10. [Figure 4] FIG. 2 is a plan view showing the container 10. [Figure 5] FIG. 2 is a perspective view showing the drawer portion 14. [Figure 6] FIG. 2 is a plan view showing the partition section 20. [Figure 7] FIG. 2 is a bottom view showing the partition section 20. [Figure 8] FIG. 8 is an end view taken along line VIII-VIII in FIG. 6. [Figure 9] FIG. 7 is an end view taken along line IX-IX in FIG. 6. [Figure 10]FIG. 2 is an end view illustrating the effect of the animal litter box of FIG. 1. [Figure 11] FIG. 2 is an end view illustrating the effect of the animal litter box of FIG. 1. [Figure 12] FIG. 10 is an end view illustrating a modified example of the wall portion 24. [Figure 13] 13 is a plan view showing the through-hole 22 and the wall portion 24 of FIG. 12. FIG. [Figure 14] FIG. 10 is an end view illustrating another modified example of the wall portion 24. [Figure 15] 10 is a bottom view illustrating another modified example of the wall portion 24. FIG. [Figure 16] FIG. 2 is an end view illustrating a modified example of the animal litter box of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention 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 redundant description will be omitted.

[0011] FIG. 1 is an end view showing one embodiment of an animal litter box according to the present invention. With reference to this figure, the configuration of the animal litter box 1 will be outlined. The animal litter box 1 comprises a container 10, a drawer 14, a divider 20, a plurality of granular materials 30, and an absorbent sheet 40. The container 10 is box-shaped with a bottom portion 10a and a side portion 10b. In this embodiment, the container 10 is substantially rectangular. The container 10 can be made of plastic, such as polypropylene or polyethylene.

[0012] The container 10 has a protruding portion 10c that protrudes from the side surface portion 10b toward the inside of the container 10. The protruding portion 10c may be a projection or a ridge. The protruding portion 10c may be molded integrally with the side surface portion 10b, or may be molded separately from the side surface portion 10b and then attached to the side surface portion 10b. The protruding length of the protruding portion 10c (the length in the direction perpendicular to the inner surface of the side surface portion 10b on which the protruding portion 10c is provided) is, for example, 5 mm or more and 15 mm or less.

[0013] The drawer 14 can be inserted into and removed from the container 10 through an opening 12 formed in the side surface 10b. A water-absorbent sheet 40 is housed in the drawer 14. The drawer 14 can be made of a plastic such as polypropylene or polyethylene.

[0014] The partition 20 is placed on the protruding portion 10c. The partition 20 is not fixed to the container 10. The partition 20 is detachable from the container 10. The partition 20 is generally plate-shaped and is disposed parallel to the bottom surface 10a. The partition 20 has through-holes 22 that allow urine to pass through. The partition 20 is provided at a position spaced apart from both the absorbent sheet 40 and the upper end of the container 10. As a result, the partition 20 divides the interior of the container 10 into upper and lower spaces. That is, the partition 20 is disposed so as to divide the internal space of the container 10 into an upper space S1 and a lower space S2. The upper space S1 is located above the partition 20 and is a space in which a plurality of granular bodies 30 are disposed. The lower space S2 is located below the partition 20 and is a space in which urine that has passed through the through-holes 22 accumulates. In this way, the animal litter box 1 has an upper space S1 and a lower space S2 separated by the partition 20. The partition 20 can be made of a plastic such as polypropylene or polyethylene.

[0015] A plurality of granular materials 30 for treating excrement (urine) are arranged in the upper space S1. The plurality of granular materials 30 are arranged in the upper space S1, laid on the partition 20. When the animal litter box 1 is in use, the granular materials 30 directly receive excreted urine. The granular materials 30 are water-repellent. In other words, the granular materials 30 have the property of not absorbing liquids such as urine at all, or absorbing very little if any.

[0016] For the granular material 30 to be considered water-repellent, the water-repellency rate measured by the following test must be 80% or higher. First, 50 g of the granular material 30 (sample) is placed on a sieve with an inner diameter of 10 cm and mesh size of 1 mm. An empty beaker is placed below the sieve. Then, 30 ml of water is dripped onto the sample over 10 seconds using a syringe (Terumo 60 ml syringe) with an outer barrel inner diameter of 3 cm and a tip inner diameter of 4 mm. After leaving it for 1 minute, the amount of water in the beaker is measured. The water-repellency rate is calculated as the ratio of the measured amount of water to the amount of water dripped (30 ml). In other words, if the amount of water in the beaker is 24 ml or higher, the water-repellency rate is 80% or higher, and the granular material 30 can be considered water-repellent. For reference, the water-repellency rate of typical absorbent cat litter available on the market is approximately 5%.

[0017] The granular material 30 is formed into a granular shape. Examples of such granular shapes include spheres, cylinders, and ellipsoids. The particle size of the granular material 30 is, for example, 5 mm to 20 mm. Here, the particle size is defined as the diameter of the smallest sphere that can contain the granular material 30. The granular material 30 is preferably made primarily of an organic material. Here, the term "main material" refers to the material that accounts for the largest weight percentage of the granular material 30 among one or more materials that make up the granular material 30. Examples of organic materials that can be used include paper, used tea leaves, plastics, and soybean lees.

[0018] Papers refer to materials primarily composed of pulp. Examples of papers include, in addition to ordinary paper, PVC wallpaper fractions, photographic paper, release paper, fluff pulp, papermaking sludge, and pulp sludge. PVC wallpaper fractions are obtained by removing a portion of the polyvinyl chloride from PVC wallpaper containing paper and PVC. Examples of plastics include, in addition to ordinary plastics, aluminum vapor deposition films and disposable diaper fractions (plastics obtained by classifying disposable diapers). Dried bean curd refuse is preferred. These materials may be treated to be water-repellent.

[0019] The granular material 30 may be made of only one material, or may be made of two or more materials. In the former case, the material making up the granular material 30 is only the main material described above. In the latter case, the granular material 30 is made up of a mixture of the main material and other materials. An example of such other material is gypsum. Adding gypsum can increase the water repellency of the granular material 30. The amount of gypsum is, for example, 5% by weight or more and 15% by weight or less of the total granular material 30.

[0020] The granules 30 can be manufactured, for example, by the following method. First, the material to be granulated (the material that constitutes the granules 30) is granulated using a granulation device to form a granule that will become the granules 30. An extrusion granulator, for example, can be used as the granulation device. The granules may be subjected to a water-repellent treatment as needed. The water-repellent treatment can be performed, for example, by coating the surface of the granules with a water-repellent agent. If the water-repellent treatment is not performed, it is preferable to minimize the formation of gaps within the granules by increasing the pressure applied to the material to be granulated during granulation. This is because such gaps can serve as a path for moisture, such as urine, to penetrate into the granules 30. Prior to granulation, the material to be granulated may be subjected to pre-treatment such as pulverization, kneading, or hydration as needed. After granulation, post-treatment such as sieving (sizing) or drying may be performed as needed.

[0021] An absorbent sheet 40 is disposed in the lower space S2. In this embodiment, the absorbent sheet 40 is disposed in the lower space S2 while being housed in the drawer 14. The absorbent sheet 40 absorbs urine that has passed through the through-holes 22 of the divider 20. That is, the urine that has passed through the through-holes 22 is absorbed by the absorbent sheet 40 and accumulates in the lower space S2.

[0022] When the animal litter box 1 is in use, 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 in the partition 20 and is absorbed by the absorbent sheet 40.

[0023] The configuration of each part of the animal litter box 1 will be described in detail below with reference to FIGS. 2 to 9. FIGS. 2, 3, and 4 are an end view, a front view, and a plan view, respectively, of the container 10. As shown in FIGS. 2 and 3, an opening 12 for inserting and removing the drawer 14 is formed in the side surface 10b of the container 10. The opening 12 is located near the bottom surface 10a and has a horizontally long rectangular shape. The horizontal length of the opening 12 (the left-right direction in FIG. 3) is approximately equal to the internal width of the container 10, and is, for example, 20 cm to 40 cm. The vertical length of the opening 12 (the up-down direction in FIG. 3) is, for example, 2 cm to 5 cm. Furthermore, as shown in FIG. 4, in this embodiment, the protruding portion 10c is a ridge provided annularly around the entire inner surface of the side surface 10b in a plan view.

[0024] 5 is a perspective view showing the drawer unit 14. The drawer unit 14 has a bottom plate 14a, a front plate 14b, a tip plate 14c, and a pair of side plates 14d. The size of the bottom plate 14a is approximately equal to the size of the bottom surface 10a of the container 10. The front plate 14b has approximately the same shape and size as the opening 12. A handle 15 is attached to the front plate 14b.

[0025] 6 and 7 are a plan view and a bottom view, respectively, showing the partition section 20. That is, FIGS. 6 and 7 show the top surface (the surface on the upper region S1 side) and the bottom surface (the surface on the lower region S2 side) of the partition section 20, respectively. Also, FIGS. 8 and 9 are end views taken along lines VIII-VIII and IX-IX in FIG. 6, respectively. The partition section 20 has a substantially rectangular shape in plan view (see FIG. 6). Here, the term "substantially rectangular" is not limited to a rectangle, but also includes shapes close to a rectangle, such as a rectangle with rounded corners.

[0026] The partition section 20 has a plurality of through holes 22. In the following description, "a plurality of through holes 22" refers to all of the through holes 22 provided in the partition section 20 unless otherwise specified. The plurality of through holes 22 are two-dimensionally arranged in the partition section 20. Specifically, the plurality of through holes 22 are two-dimensionally arranged along a first direction (the left-right direction in FIG. 6) and a second direction (the up-down direction in FIG. 6) intersecting the first direction. In this 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 lattice pattern. The planar shape of each through hole 22 is circular. Each through hole 22 allows urine to pass through but does not allow the granular material 30 to pass through.

[0027] The partition 20 has a wall 24. The wall 24 is provided on the lower surface of the partition 20 around the through hole 22 and protrudes toward the lower space S2. The wall 24 is cylindrical and surrounds the entire periphery of the through hole 22. In this embodiment, the wall 24 is cylindrical. Therefore, the wall 24 extends vertically downward 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 (horizontal diameter) 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 protruding portion 10c of the container 10. The thickness t1 of the wall 24 is preferably ¼ or less, more preferably ⅛ or less, of the diameter d1 of the through hole 22. 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.

[0028] The wall portions 24 are provided around each through hole 22. Therefore, since 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 includes a through hole 22a (first through hole) and a through hole 22b (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 of the plurality of through holes 22 that is closest to the through hole 22a. The wall portions 24 include a wall portion 24a (first wall portion) provided around the through hole 22a and a wall portion 24b (second wall portion) provided around the through hole 22b. A distance d2 between the wall portion 24a and the wall portion 24b is greater than a thickness t1 of the wall portion 24a and the wall portion 24b. The distance d2 is preferably at least 1 / 2, and more preferably at least 2 / 3, of the distance d3 between the through holes 22a and 22b.

[0029] The effects of the animal litter box 1 will now be described. In the animal litter box 1, a wall portion 24 is provided around the through-hole 22, protruding from the underside of the partition portion 20 toward the lower space S2. As a result, as shown in FIG. 10, even if a bad odor is generated from urine that has accumulated in the lower space S2, at least a portion of the odor 90 can be blocked by the wall portion 24. For this reason, compared to when the wall portion 24 is not provided, the odor 90 is less likely to flow into the through-hole 22. Therefore, an animal litter box 1 has been realized that makes it less likely for the odor 90 from urine that has accumulated in the lower space S2 to rise up to the upper space S1.

[0030] 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 odors from entering the through hole 22 compared to when the inner surface of the wall portion 24 is not continuous with the side surface of the through hole 22, i.e., when the wall portion 24 is spaced apart from the through hole 22.

[0031] The wall portion 24 is cylindrical and surrounds the entire periphery of the through-hole 22. In this case, the inflow of odors into the through-hole 22 can be more reliably prevented than in a case where the wall portion 24 is provided only on a portion of the periphery of the through-hole 22.

[0032] The wall portion 24 has a cylindrical shape. In this case, the wall portion 24 that surrounds the entire periphery of the through-hole 22 can be realized with a simple structure.

[0033] As shown by the arrows in FIG. 11 , odor 90 that reaches the lower end 24c of wall 24 may flow along the lower end 24c into through-hole 22. Therefore, reducing the thickness of wall 24 is advantageous in preventing odor 90 from flowing into through-hole 22, since the area of ​​lower end 24c is reduced. From this perspective, the thickness of wall 24 is preferably 1 / 4 or less, and more preferably 1 / 8 or less, of the diameter of through-hole 22. On the other hand, if the thickness of wall 24 is too small, the strength of wall 24 may be insufficient. From this perspective, the thickness of wall 24 is preferably 1 / 16 or more of the diameter of through-hole 22.

[0034] Increasing the height of the wall portion 24 is advantageous for blocking a large amount of odor with the wall portion 24. From this perspective, it is preferable that the height of the wall portion 24 is greater than the thickness of the partition portion 20. On the other hand, if the height of the wall portion 24 is too great, problems may arise, such as urine easily clogging the cylindrical wall portion 24. From this perspective, it is preferable that the height of the wall portion 24 is three times the thickness of the partition portion 20 or less.

[0035] The partition 20 has a plurality of through holes 22. Providing a plurality of through holes 22 in this manner allows urine to move smoothly from the upper space S1 to the lower space S2. In addition, a wall portion 24 is provided around each through hole 22. This makes it difficult for odors to flow into any of the through holes 22.

[0036] The distance d2 between the wall portion 24a and the wall portion 24b (see FIGS. 8 and 9) is larger than the thickness of each of the wall portions 24a, 24b. By increasing the distance d2 in this manner, a larger space can be secured for capturing odors. This is advantageous for blocking a large amount of odors with the wall portion 24. From this perspective, the distance d2 is preferably at least 1 / 2, and more preferably at least 2 / 3, of the distance d3 between the through holes 22a and 22b. On the other hand, if the distance d2 is too large, the thickness of the wall portion 24 may become excessively small. From this perspective, the distance d2 is preferably at most 7 / 8 of the distance d3.

[0037] Each granule 30 is water-repellent. In this case, most of the urine excreted on the granules 30 is not absorbed by the granules 30 but passes through the gaps between the granules 30. This allows the urine to be smoothly guided to the partition 20.

[0038] When each granule 30 is made primarily of organic matter, it is possible to obtain granules 30 that are suitable for incineration. If the granules 30 are suitable for incineration, the used granules 30 can be disposed of as combustible waste, improving convenience for users.

[0039] The animal litter box 1 is provided with a container 10 having an internal space that is divided into an upper space S1 and a lower space S2 by a partition 20. In this case, it is possible to realize an animal litter box 1 that has an upper space S1 and a lower space S2 with a single container (container 10). This is advantageous in simplifying the configuration of the animal litter box 1.

[0040] The partition 20 is not fixed to the container 10. In this case, the partition 20 can be easily attached to and detached from the container 10.

[0041] The partition 20 is placed on the protruding portion 10c, which allows the partition 20 to be kept in a predetermined position within the container 10 without being fixed to the container 10.

[0042] The lower space S2 is provided with a water-absorbent sheet 40. This allows urine that accumulates in the lower space S2 to be trapped within the water-absorbent sheet 40. This reduces the occurrence of bad odors caused by the urine.

[0043] The animal litter box 1 is provided with a drawer 14 that can be inserted into and removed from the container 10. This makes it easy to replace a used water-absorbent sheet 40 with a new one.

[0044] The present invention is not limited to the above-described embodiment and various modifications are possible. In the above-described embodiment, the wall portion 24 extends vertically downward from the lower surface of the partition portion 20. However, the wall portion 24 may extend obliquely toward the inside of the through-hole 22 as it moves away from the lower surface of the partition portion 20, as shown in FIG. 12 . In this example, the wall portion 24 is also provided 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. In other words, the wall portion 24 has a tapered shape. As shown in FIG. 13 , the lower end 24c of the wall portion 24 is located within the through-hole 22 in a plan view. FIG. 13 is a plan view of the through-hole 22 and wall portion 24 of FIG. 12 .

[0045] By slanting the wall portion 24 in this manner, it is possible to more easily prevent odors from entering the through-hole 22. When the wall portion 24 is provided at an angle, the height h1 of the wall portion 24 is defined as the vertical distance from the lower end 24c to the upper end 24d. Furthermore, the distance d2 between the wall portion 24a and the wall portion 24b is defined as the distance between the upper ends of the two.

[0046] 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 has been exemplified. However, the inner surface of the wall portion 24 does not have to be continuous with the side surface of the through hole 22, as shown in FIG. 14, for example.

[0047] In the above embodiment, the wall portion 24 is provided so as to surround the entire periphery of the through hole 22. However, the wall portion 24 may be provided only on a part of the periphery of the through hole 22, as shown in Fig. 15, for example. Fig. 15 is a bottom view of the through hole 22 and the wall portion 24 as viewed from below.

[0048] In the above embodiment, the planar shape of the through-hole 22 is circular. However, the planar shape of the through-hole 22 is arbitrary, and may be, for example, a polygon such as a rectangle, or an ellipse.

[0049] In the above embodiment, the case where the drawer 14 is provided has been exemplified. However, providing the drawer 14 is not essential. When the drawer 14 is not provided, the water-absorbent sheet 40 is disposed directly on the bottom surface portion 10a. In that case, naturally, the opening 12 is not provided in the side surface portion 10b.

[0050] 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. If the water-absorbent sheet 40 is not disposed, the drawer section 14 is not provided either.

[0051] In the above embodiment, the upper space S1 and the lower space S2 are configured by one container 10. However, as shown in FIG. 16, for example, a container 52 configuring the upper space S1 and a container 54 configuring the lower space S2 may be provided separately. In the same figure, each of the containers 52, 54 is box-shaped with a bottom and side. The container 52 is stacked on top of the container 54. The bottom of the container 52 forms the partition 20. [Explanation of symbols]

[0052] 1. Animal toilet 10 containers 10a Bottom part 10b Side part 10c overhang 12 aperture 14 Drawer section 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 bottom end 24d top end 30 Granules 40 Absorbent Sheet 52 Container 54 Container S1 upper space S2 lower space 90 Odor

Claims

1. A partition having a through hole that allows urine to pass through; an upper space located above the partition and in which a plurality of granular materials are disposed; a lower space located below the partition and in which the urine that has passed through the through-holes accumulates, the partition portion has a wall portion provided on a lower surface of the partition portion around the through hole and protruding toward the lower space, The animal litter box is characterized in that the wall portion is cylindrical and surrounds the entire periphery of the through-hole.

2. The animal litter box according to claim 1, An animal litter box, 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, The wall portion is cylindrical in shape.

4. A partition having a through hole that allows urine to pass through; an upper space located above the partition and in which a plurality of granular materials are disposed; a lower space located below the partition and in which the urine that has passed through the through-holes accumulates, the partition portion has a wall portion provided on a lower surface of the partition portion around the through hole and protruding toward the lower space, The animal litter box is characterized in that the wall portion extends obliquely toward the inside of the through-hole as it moves away from the lower surface of the partition portion.

5. The animal litter box according to claim 4, The lower end of the wall portion is located within the through hole in a plan view.

6. The animal litter box according to claim 4 or 5, The animal litter box has an opening area at the lower end of the wall portion that is smaller than the opening area at the upper end of the wall portion.

7. The animal litter box according to claim 6, The inner diameter of the wall portion gradually decreases from the upper end to the lower end.

8. The animal litter box according to any one of claims 1 to 7, The animal litter box has a thickness of the wall portion that is equal to or less than 1 / 4 of the diameter of the through hole.

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

10. The animal litter box according to any one of claims 1 to 9, The animal litter box, wherein the height of the wall portion is greater than the thickness of the partition portion.

11. A partition having a through hole that allows urine to pass through; an upper space located above the partition and in which a plurality of granular materials are disposed; a lower space located below the partition and in which the urine that has passed through the through-holes accumulates, the partition portion has a wall portion provided on a lower surface of the partition portion around the through hole and protruding toward the lower space, the partition portion has a plurality of the through holes, The wall portion is provided around each of the through holes, 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, An animal litter box, wherein the distance between the first wall portion and the second wall portion is greater than the thickness of the first and second wall portions.

12. The animal litter box according to claim 11, The animal litter box, wherein the distance between the first wall portion and the second wall portion is at least half the distance between the first through hole and the second through hole.

13. The animal litter box according to claim 12, The animal litter box, wherein the distance between the first wall portion and the second wall portion is at least two-thirds of the distance between the first through-hole and the second through-hole.

14. The animal litter box according to any one of claims 1 to 13, The granular materials are water-repellent.

15. The animal litter box according to claim 14, The granular materials are animal litter boxes made primarily of organic matter.

16. The animal litter box according to any one of claims 1 to 15, a box-shaped container having a bottom and a side; The partition is arranged to divide the internal space of the container into the upper space and the lower space.

17. The animal litter box according to claim 16, The partition is not fixed to the container.

18. The animal litter box according to claim 17, the container has a protruding portion provided so as to protrude from the side surface toward the inside of the container, The partition portion is placed on the protruding portion.

19. The animal litter box according to any one of claims 16 to 18, The animal litter box is provided with a water-absorbent sheet that is disposed in the lower space and absorbs the urine that has passed through the through-holes.

20. The animal litter box according to claim 19, a drawer portion in which the water-absorbent sheet is housed, An opening is formed in the side surface of the container, The animal litter box has a drawer portion that can be inserted into and removed from the container through the opening.

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