Animal toilet

Abstract

To provide an animal toilet suitable for smooth movement of urine from an upper space to a lower space, while suppressing leakage of smell from the lower space to the upper space.SOLUTION: An animal toilet includes a body part 10 and a partition part 20. The body part 10 receives excreted urine. The partition part 20 divides an internal space of the body part 10 into an upper space S1 and a lower space S2. The partition part 20 has multiple open holes for allowing passage of urine. The multiple open holes include an open hole 23 and an open hole 25. The open hole 25 is positioned on a higher position than the open hole 23. An opening space of the open hole 23 is larger than an opening space of the open hole 25.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 main body (tray) that receives excreted urine, and a partition (drain) disposed within the main body. The internal space of the main body is divided into an upper space and a lower space by the partition. The partition has through-holes that allow urine to pass through. A plurality of granular materials with low water absorption are laid in the upper space. An absorbent sheet is disposed in the lower space. Urine excreted in the main body passes through the gaps between the granular materials and then moves from the upper space to the lower space through the through-holes. The urine that moves to the lower space is absorbed by the absorbent sheet and accumulates 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, it is advantageous to increase the opening area of ​​the through-holes in order to allow urine to move smoothly from the upper space to the lower space. However, increasing the opening area of ​​the through-holes makes it easier for odors generated from urine accumulated in the lower space to leak into the upper space through the through-holes. This causes a 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 is suitable for smoothly moving urine from the upper space to the lower space while suppressing the leakage of odor from the lower space to the upper space. [Means for solving the problem]

[0006] The animal litter box according to the present invention comprises a main body portion that receives excreted urine, and a partition portion having a plurality of through holes that allow the urine to pass through and that divides the internal space of the main body portion into an upper space and a lower space, wherein the plurality of through holes include a first through hole and a second through hole that is positioned higher than the first through hole, and the opening area of ​​the first through hole is larger than the opening area of ​​the second through hole.

[0007] In this animal litter box, first and second through-holes are provided in the partition. The second through-hole is located higher than the first through-hole. The opening area of ​​the first through-hole is larger than the opening area of ​​the second through-hole. By increasing the opening area of ​​the first through-hole, which is located at a relatively low position, urine can move more smoothly from the upper space to the lower space. Furthermore, by reducing the opening area of ​​the second through-hole, which is located at a relatively high position, odors generated from urine collected in the lower space are less likely to leak into the upper space. [Effects of the Invention]

[0008] According to the present invention, an animal litter box suitable for smoothly moving urine from the upper space to the lower space while suppressing the leakage of odor from the lower space to the upper space is realized. [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. 2 is an end view showing the main body 10. [Figure 3] FIG. 2 is a front view showing the main body 10. [Figure 4] FIG. 2 is a plan view showing the main body 10. [Figure 5] FIG. 2 is a plan view showing the partition section 20. [Figure 6] FIG. 6 is an end view taken along line VI-VI in FIG. 5. [Figure 7] FIG. 7 is an end view taken along line VII-VII in FIG. 5. [Figure 8] FIG. 2 is a perspective view showing a drawer portion 50. [Figure 9] FIG. 10 is an end view showing a partition portion 20 according to a modified example. [Figure 10] FIG. 2 is a diagram 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. The configuration of the animal litter box 1 will be outlined with reference to this figure. The animal litter box 1 comprises a main body 10, a partition 20, a plurality of granular materials 30, an absorbent sheet 40, and a drawer 50. The main body 10 consists of a single container and has a bottom 10a and a side 10b. The main body 10 receives excreted urine. The external shape of the main body 10 is a roughly rectangular parallelepiped. The main body 10 can be made of a plastic such as polypropylene or polyethylene.

[0012] The main body 10 has a support portion 12. The support portion 12 protrudes from the side surface portion 10b toward the inside of the main body 10. The support portion 12 supports the partition portion 20 from below. The support portion 12 is formed, for example, by a protrusion or projection. The support portion 12 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.

[0013] The partition 20 is placed on the support part 12. However, the partition 20 is not fixed to the main body 10. The partition 20 is detachable from the main body 10. The partition 20 is made of a plate-shaped member. The partition 20 is disposed at a position spaced apart from both the upper end of the main body 10 (side surface part 10b) and the absorbent sheet 40. As a result, the partition 20 divides the internal space of the main body 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 where a plurality of granular materials 30 are laid. The lower space S2 is located below the partition 20 and is a space where urine collects. The partition 20 can be made of a plastic such as polypropylene or polyethylene.

[0014] The partition 20 has a plurality of through holes that allow urine to pass through. In the following description, unless otherwise specified, "a plurality of through holes" refers to all through holes provided in the partition 20. Each through hole allows urine to pass through but does not allow the granular material 30 to pass through. The plurality of through holes includes a through hole 23 (a first through hole) and a through hole 25 (a second through hole). In this embodiment, the plurality of through holes consists only of the through hole 23 and the through hole 25. The through hole 25 is located higher than the through hole 23. That is, the distance from the through hole 25 to the bottom surface 10a is greater than the distance from the through hole 23 to the bottom surface 10a. The partition 20 has a plurality of through holes 23 and a plurality of through holes 25. The number of through holes 23 is preferably 30% to 70% of the total number of the through holes 23 and the through holes 25, and more preferably 40% to 60%.

[0015] A plurality of granular materials 30 for treating excrement (mainly urine) are laid in the upper space S1 (above the partition 20). Each granular material 30 is granular. Examples of the shape of such granular materials include a sphere, a cylinder, and an ellipsoid. The particle size of each granular material 30 is, for example, 5 mm or more and 20 mm or less. Here, the particle size of a granular material 30 is defined as the diameter of the smallest sphere that can contain the granular material 30. When the animal litter box 1 is in use, the granular materials 30 directly receive excreted urine.

[0016] The granular material 30 is hydrophobic. That is, the granular material 30 has the property of not absorbing any liquids, such as urine, or absorbing very little if any. For the granular material 30 to be considered hydrophobic, it is necessary for the liquid passage rate, as measured by the following test, to be 60% or more. First, 50 g of the granular material 30 (sample) is placed on a sieve with an inner diameter of 10 cm and a 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 inner diameter of 3 cm and an inner diameter of 4 mm at the tip. After leaving it for 1 minute, the amount of water in the beaker is measured. The ratio of the measured amount of water to the amount of dripped water (30 ml) is defined as the liquid passage rate. If the amount of water in the beaker is 18 ml or more, the liquid passage rate is 60% or more, and the granular material 30 is considered to be hydrophobic.

[0017] Each granule 30 is preferably made primarily of an organic material. Here, the "main material" of the granule 30 refers to the material that accounts for the largest weight percentage of the granule 30 among one or more materials that make up the granule 30. Examples of such organic materials include paper, used tea leaves, plastics, and soybean lees. Each granule 30 may be made solely of organic materials, or may be made of organic and inorganic materials.

[0018] Papers refer to materials primarily composed of pulp. Examples of papers include 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 ordinary plastics, aluminum vapor-deposited film, and disposable diaper fractions (plastics obtained by classifying disposable diapers). Dried bean curd refuse is preferred. These materials may or may not be subjected to a hydrophobic (water-repellent) treatment.

[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. Examples of other materials include gypsum or baking soda. Adding gypsum or baking soda can increase the hydrophobicity of the granular material 30. The proportion of gypsum or baking soda is, for example, 5% by weight or more and less than 50% by weight of the entire 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 hydrophobic treatment, if necessary. The hydrophobic treatment can be performed, for example, by coating the surface of the granules with a hydrophobic agent (water repellent). If the hydrophobic 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 liquids such as urine to penetrate into the granules 30. Prior to granulation, the material to be granulated may be subjected to pretreatment such as pulverization, kneading, or hydration, as needed. After granulation, posttreatment such as sieving (sizing) or drying may be performed as needed.

[0021] A water-absorbent sheet 40 is disposed in the lower space S2 (below the partition 20). The water-absorbent sheet 40 absorbs urine that has passed through the through-holes of the partition 20. That is, the urine that has passed through the through-holes is absorbed by the water-absorbent sheet 40 and accumulates in the lower space S2.

[0022] The drawer 50 can be inserted into and removed from the main body 10 through an opening 14 formed in the side surface 10b. The drawer 50 houses the absorbent sheet 40. That is, the absorbent sheet 40 is disposed inside the main body 10 while housed in the drawer 50. The drawer 50 can be made of a plastic such as polypropylene or polyethylene.

[0023] 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 in the partition 20 and is absorbed by the absorbent sheet 40.

[0024] The configuration of each part of the animal litter box 1 will be described in detail below with reference to Figs. 2 to 8. Figs. 2 and 3 are an end view and a front view, respectively, of the main body 10. An opening 14 for inserting and removing the drawer 50 is formed in the side surface 10b of the main body 10. The opening 14 is located near the bottom surface 10a and has a horizontally long rectangular shape. The length of the opening 14 in the horizontal direction (left-right direction in Fig. 3) is approximately equal to the width (inner dimension) of the main body 10, and is, for example, 20 cm to 40 cm. The length of the opening 14 in the vertical direction (top-bottom direction in Fig. 3) is, for example, 2 cm to 5 cm.

[0025] FIG. 4 is a plan view showing the main body 10. The support portion 12 is provided over the entire inner periphery of the side portion 10b in plan view. That is, the support portion 12 is composed of a protrusion provided in an annular shape along the inner periphery of the side portion 10b. The inner periphery of the side portion 10b has a substantially rectangular shape in plan view. Here, the term "substantially rectangular" is not limited to a rectangle, but also includes shapes close to a rectangle, such as a rounded quadrangle. The protruding length of the support portion 12 (the length in the direction perpendicular to the inner surface of the side portion 10b on which the support portion 12 is provided) is, for example, 5 mm or more and 15 mm or less.

[0026] Fig. 5 is a plan view showing the partition 20. Figs. 6 and 7 are end views taken along lines VI-VI and VII-VII in Fig. 5, respectively. The partition 20 can be disposed within the main body 10 with its entire periphery spaced apart from the side surface 10b. The partition 20 has a generally rectangular shape in plan view. The partition 20 has a bottom 22, an inclined portion 24, and an edge 26.

[0027] The bottom 22 is located in the center of the partition 20 in a plan view. The area ratio of the bottom 22 to the partition 20 in a plan view is preferably 20% to 60% and more preferably 30% to 50%. The bottom 22 has a rectangular flat plate shape and forms the bottom surface of the partition 20. The partition 20 is disposed within the main body 10 so that the bottom 22 is horizontal. The bottom 22 has a plurality of through holes 23. In this embodiment, all of the through holes 23 are present in the bottom 22. The plurality of through holes 23 are arranged in a lattice pattern on the bottom 22. The planar shape of each through hole 23 is circular. Each through hole 23 has a shape obtained by drilling the bottom 22 with a cylinder having a central axis parallel to the height direction of the main body 10 (the direction perpendicular to the paper surface of FIG. 5).

[0028] The inclined portion 24 is located around the bottom portion 22. Specifically, the inclined portion 24 consists of four portions. The four portions of the inclined portion 24 are connected to the four sides of the bottom portion 22, respectively. Each portion of the inclined portion 24 has a trapezoidal flat plate shape. As can be seen from FIGS. 6 and 7, the inclined portion 24 slopes downward toward the bottom portion 22. The inclination angle α of the inclined portion 24 is preferably 10° to 50°, and more preferably 20° to 40°. The inclined portion 24 has a plurality of through holes 25. In this embodiment, all of the through holes 25 are present in the inclined portion 24. The plurality of through holes 25 are arranged in a lattice pattern in the inclined portion 24. The planar shape of each through hole 25 is circular. Each through hole 25 has a shape obtained by drilling the inclined portion 24 with a cylinder having a central axis parallel to the height direction of the main body 10.

[0029] The opening area of ​​each through hole 23 is larger than the opening area of ​​each through hole 25. Here, the opening area is defined as the area of ​​the opening portion when each through hole 23, 25 is viewed in plan (see FIG. 5). The opening area of ​​each through hole 23 is preferably at least twice the opening area of ​​each through hole 25, and more preferably at least four times the opening area of ​​each through hole 25.

[0030] The edge 26 is located around the inclined portion 24 and forms the edge of the partition portion 20. The edge 26 is not inclined and is provided parallel to the bottom portion 22. The edge 26 is the portion that is placed on the support portion 12 of the main body portion 10. The lower end of the inclined portion 24 is connected to the bottom portion 22 and the upper end is connected to the edge 26. The inclined portion 24 is inclined downward from the edge 26 toward the bottom portion 22. Note that the edge 26 does not have a through hole formed therein.

[0031] 8 is a perspective view showing the drawer unit 50. The drawer unit 50 has a bottom plate 50a, a front plate 50b, a tip plate 50c, and a pair of side plates 50d. The size of the bottom plate 50a is approximately equal to the size of the bottom surface 10a of the main body 10. The front plate 50b has approximately the same shape and size as the opening 14. A handle 52 is attached to the front plate 50b.

[0032] The effects of the animal litter box 1 will be described. In the animal litter box 1, the partition 20 is provided with a through hole 23 and a through hole 25. The through hole 25 is located higher than the through hole 23. The opening area of ​​the through hole 23 is larger than the opening area of ​​the through hole 25. By increasing the opening area of ​​the through hole 23, which is located at a relatively low position, urine can more easily move from the upper space S1 to the lower space S2. This is because urine has the tendency to flow downward, and therefore passes more easily through a through hole (through hole 23) located at a relatively low position than through holes (through hole 25) located at a relatively high position. Furthermore, by reducing the opening area of ​​the through hole 25 located at a relatively high position, odors generated from urine accumulated in the lower space S2 are less likely to leak into the upper space S1. This is because odors have the tendency to rise, and therefore pass more easily through a through hole (through hole 25) located at a relatively high position than through holes (through hole 23) located at a relatively low position. Therefore, an animal litter box 1 is realized that is suitable for smoothly moving urine from the upper space S1 to the lower space S2 while suppressing leakage of odor from the lower space S2 to the upper space S1.

[0033] From the perspective of thus suppressing odor leakage while facilitating the movement of urine, the opening area of ​​through hole 23 is preferably at least two times, and more preferably at least four times, the opening area of ​​through hole 25. On the other hand, if this ratio is too large, the range in which the opening area of ​​each through hole 23, 25 can be designed becomes narrow, which may cause problems in manufacturing the animal litter box 1. From this perspective, the opening area of ​​through hole 23 is preferably no more than eight times the opening area of ​​through hole 25.

[0034] The partition 20 has a bottom 22 and an inclined portion 24. By providing the inclined portion 24 in this manner, urine can be concentrated in a part (bottom 22) of the partition 20. This allows urine to move efficiently from the upper space S1 to the lower space S2.

[0035] The bottom 22 is provided with a through-hole 23. This makes it difficult for urine to remain on the bottom 22 of the divider 20. Furthermore, the inclined portion 24 is provided with a through-hole 25. This makes it difficult for urine to remain on the inclined portion 24 of the divider 20 either.

[0036] The bottom 22 is located in the center of the partition 20, and the inclined portion 24 is located around the bottom 22. Odors generated from urine collected in the lower space S2 tend to rise, particularly along the side surface 10b of the main body 10. Therefore, by positioning the inclined portion 24, which is provided with through-holes 25 with a relatively small opening area, near the side surface 10b, it is possible to efficiently prevent odors from leaking from the lower space S2 to the upper space S1.

[0037] Increasing the area of ​​the bottom 22 is advantageous for allowing urine to move smoothly from the upper space S1 to the lower space S2. From this perspective, the area ratio of the bottom 22 to the partition 20 in a plan view is preferably 20% or more, and more preferably 30% or more. On the other hand, if the area of ​​the bottom 22 is too large, odors will easily leak from the lower space S2 to the upper space S1. From this perspective, the area ratio is preferably 60% or less, and more preferably 50% or less.

[0038] Increasing the number of through holes 23 is advantageous for smoothly transferring urine from the upper space S1 to the lower space S2. From this perspective, the number of through holes 23 is preferably 30% or more, and more preferably 40% or more, of the total number of through holes 23 and through holes 25. On the other hand, if the number of through holes 23 is too large, odors will be more likely to leak from the lower space S2 to the upper space S1. From this perspective, the number of through holes 23 is preferably 70% or less, and more preferably 60% or less, of the total number of through holes 23 and through holes 25.

[0039] The larger the inclination angle α of the inclined portion 24, the easier it is for urine to flow down the inclined portion 24. From this perspective, the inclination angle α is preferably 10° or more, and more preferably 20° or more. On the other hand, if the inclination angle α is too large, it becomes difficult to stably lay the granular material 30 on the inclined portion 24. From this perspective, the inclination angle α is preferably 50° or less, and more preferably 40° or less.

[0040] The main body 10 is made up of a single container. In this case, the animal litter box 1 having the upper space S1 and the lower space S2 can be realized with a simpler configuration than when the main body 10 is made up of multiple containers.

[0041] The support portion 12 is provided on the entire inner periphery of the side surface portion 10b in plan view, which makes it easier to prevent the partition portion 20 from falling into the lower space S2.

[0042] The partition 20 can be disposed within the main body 10 with its entire periphery spaced apart from the side surface 10b. By providing a margin between the partition 20 and the side surface 10b in this manner, the partition 20 can be easily attached to and detached from the main body 10.

[0043] The partition 20 is not fixed to the main body 10. In this case, the partition 20 can be easily attached to and detached from the main body 10.

[0044] The partition section 20 is placed on the support section 12. This allows the partition section 20 to be held in a predetermined position within the main body section 10 without being fixed to the main body section 10.

[0045] Each granule 30 is hydrophobic. In this case, most of the urine excreted on the granules 30 passes through the gaps between the granules 30 without being absorbed by the granules 30. This allows the urine to be quickly guided to the partition 20.

[0046] When each granule 30 is made primarily of organic matter, it is possible to obtain a granule 30 that is suitable for incineration. In this case, it is easier to dispose of the used granule 30 as combustible waste, improving convenience for users (such as animal owners). In particular, when each granule 30 is made solely of organic matter, it is possible to obtain a granule 30 that is even more suitable for incineration.

[0047] The lower space S2 is provided with a water-absorbent sheet 40. This allows urine that has accumulated in the lower space S2 to be trapped within the water-absorbent sheet 40. This reduces the generation of odor from the urine.

[0048] The main body 10 is provided with a drawer 50 that can be inserted into or removed from the main body 10. This allows the used water-absorbent sheet 40 to be easily replaced with a new one.

[0049] The present invention is not limited to the above-described embodiment, and various modifications are possible. In the above-described embodiment, the planar shape of the through-hole 23 is circular. However, the planar shape of the through-hole 23 may be any shape, such as an ellipse or a polygon such as a rectangle. The same applies to the planar shape of the through-hole 25.

[0050] In the above embodiment, the partition portion 20 is provided with two types of through holes (through hole 23 and through hole 25) having different opening areas. However, the partition portion 20 may have three or more types of through holes having different opening areas, as shown in FIG. 9, for example. In the same figure, the partition portion 20 has a through hole 27 (a third through hole) in addition to the through hole 23 and the through hole 25. The through hole 27 is located higher than the through hole 23 and lower than the through hole 25. The opening area of ​​the through hole 27 is smaller than the opening area of ​​the through hole 23 and larger than the opening area of ​​the through hole 25. The partition portion 20 has a plurality of through holes 27. In this example, all of the through holes 27 are located in the inclined portion 24. Specifically, the through hole 25 is located in a region of the inclined portion 24 that is relatively far from the bottom portion 22, and the through hole 27 is located in a region of the inclined portion 24 that is relatively close to the bottom portion 22.

[0051] In the above embodiment, the case where the drawer section 50 is provided has been exemplified. However, providing the drawer section 50 is not essential. When the drawer section 50 is not provided, the water-absorbent sheet 40 is disposed directly on the bottom surface section 10a. In that case, naturally, the opening 14 is not provided in the side surface section 10b.

[0052] In the above embodiment, an example has been given of a case in which the absorbent sheet 40 is provided on the main body 10. However, it is not essential to provide the absorbent sheet 40 on the main body 10. If the absorbent sheet 40 is not provided, the drawer 50 is not provided either.

[0053] In the above embodiment, the main body 10 is exemplified as being composed of one container. However, the main body 10 may be composed of multiple containers, as shown in FIG. 10, for example. In the figure, the main body 10 is composed of two containers (containers 62, 64). Each of the containers 62, 64 is box-shaped with a bottom and side. The container 62 is stacked on top of the container 64. The bottom of the container 62 forms a partition 20 having a bottom 22 and an inclined portion 24. As a result, the internal spaces of the container 62 and the container 64 form an upper space S1 and a lower space S2, respectively. The side of the container 62 and the bottom and side of the container 64 form the main body 10. [Explanation of symbols]

[0054] 1. Animal toilet 10 Main body 10a Bottom part 10b Side part 12 Support part 14 Aperture 20 Partition 22 Bottom 23 through hole (first through hole) 24 Slope 25 through hole (second through hole) 26 Edge 27 Through hole (third through hole) 30 Granules 40 Absorbent Sheet 50 Drawer section 52 Handle 62 Container 64 Container S1 upper space S2 lower space

Claims

1. a main body for receiving excreted urine; a partition portion having a plurality of through holes for allowing the urine to pass therethrough and dividing the internal space of the main body portion into an upper space and a lower space, the plurality of through holes include a first through hole and a second through hole located higher than the first through hole, an opening area of ​​the first through hole is larger than an opening area of ​​the second through hole; The partition has a bottom and an inclined portion that slopes downward toward the bottom, The animal litter box is characterized in that the second through-hole is provided in the inclined portion.

2. The animal litter box according to claim 1, The animal litter box, wherein the opening area of ​​the first through-hole is at least twice the opening area of ​​the second through-hole.

3. The animal litter box according to claim 2, An animal litter box, wherein the opening area of ​​the first through hole is four times or more the opening area of ​​the second through hole.

4. The animal litter box according to any one of claims 1 to 3, The animal litter box has a first through-hole formed in the bottom.

5. The animal litter box according to any one of claims 1 to 4, the bottom is located at the center of the partition, The inclined portion is located around the bottom of the animal litter box.

6. The animal litter box according to any one of claims 1 to 5, An animal litter box, wherein the area ratio of the bottom to the partition in a plan view is 20% or more and 60% or less.

7. The animal litter box according to claim 6, An animal litter box, wherein the area ratio of the bottom to the partition in a plan view is 30% or more and 50% or less.

8. The animal litter box according to any one of claims 1 to 7, The inclination angle of the inclined portion is 10° or more and 50° or less.

9. The animal litter box according to claim 8, The inclination angle of the inclined portion is between 20° and 40°.

10. a main body for receiving excreted urine; a partition portion having a plurality of through holes for allowing the urine to pass therethrough and dividing the internal space of the main body portion into an upper space and a lower space, the plurality of through holes include a first through hole and a second through hole located higher than the first through hole, an opening area of ​​the first through hole is larger than an opening area of ​​the second through hole; the partition portion has a plurality of the first through holes and a plurality of the second through holes, An animal litter box, wherein the number of the first through holes is 30% or more and 70% or less of the total number of the first and second through holes.

11. The animal litter box according to claim 10, An animal litter box, wherein the number of the first through holes is 40% or more and 60% or less of the total number of the first and second through holes.

12. a main body for receiving excreted urine; a partition portion having a plurality of through holes for allowing the urine to pass therethrough and dividing the internal space of the main body portion into an upper space and a lower space, the plurality of through holes include a first through hole, a second through hole located higher than the first through hole, and a third through hole located higher than the first through hole and lower than the second through hole, an opening area of ​​the first through hole is larger than an opening area of ​​the second through hole; The animal litter box according to claim 1, wherein an opening area of ​​the third through-hole is smaller than an opening area of ​​the first through-hole and larger than an opening area of ​​the second through-hole.

13. The animal litter box according to claim 12, The partition portion has a plurality of the third through holes.

14. The animal litter box according to any one of claims 1 to 13, An animal litter box comprising a plurality of hydrophobic granular materials laid in the upper space.

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 claim 15, The granular materials are made of organic matter only.

17. The animal litter box according to any one of claims 1 to 16, The main body of the animal litter box is made up of a single container and has a bottom and side surfaces.

18. The animal litter box according to claim 17, The partition is not fixed to the main body.

19. The animal litter box according to claim 18, the main body portion has a support portion protruding from the side surface portion toward the inside of the main body portion, The partition portion is placed on the support portion.

20. The animal litter box according to any one of claims 17 to 19, 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.

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

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