Cleaning method, cleaning sponge and cleaning device

Abstract

To provide a cleaning method and a cleaning sponge which enable the easy cleaning of a transportation path formed by a plurality of transportation rollers.SOLUTION: A cleaning method for cleaning a transportation path for transporting a transportation article comprises a body part 4, and a plurality of recesses 5 provided along a longitudinal direction of the body part 4 on one surface of the body part 4 and recessed in a circular arc shape in a thickness direction, wherein the recess 5 includes: an arrangement step of arranging a cleaning sponge 1 so as to come in contact with an outer peripheral surface of a transportation roller 3 in which the recess 5 of the cleaning sponge 1 extending from one end to the other end of the body part forms the transportation path 2; and a cleaning process for cleaning the outer peripheral surface; and a cleaning step of cleaning the outer peripheral surface of the transportation roller 3 by moving the cleaning sponge 1 in a width direction of the transportation path 2, in a state that the cleaning sponge 1 is arranged so as to come in contact with the outer peripheral surface of the transportation roller 3 in which the cleaning sponge 1 forms the transportation path.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a cleaning method, a cleaning sponge, and a cleaning device.

Background Art

[0002] The object to be cleaned by a cleaning sponge is not always composed of a flat surface. Therefore, cleaning sponges for cleaning objects not composed of a flat surface have been developed. For example, a cleaning sponge having a through hole for wrapping an object to be cleaned such as a pipe and a cut reaching this through hole has been disclosed (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The object to be cleaned by a cleaning sponge may have a size that cannot be wrapped by the through holes formed in the cleaning sponge. For example, a conveyance path for conveying an object to be conveyed can be considered. Some conveyance paths for conveying an object to be conveyed are formed by a plurality of conveyance rollers.

[0005] When cleaning a conveyance path formed by a plurality of conveyance rollers, in order to clean the outer peripheral surface of each conveyance roller without omission over the entire circumference, it is necessary to carefully clean each one while rotating the conveyance rollers little by little, which takes time and effort.

[0006] An object of the present invention is to provide a cleaning method and a cleaning sponge capable of easily cleaning a conveyance path formed by a plurality of conveyance rollers.

Means for Solving the Problems

[0007] A cleaning method according to one aspect of the present invention is a cleaning method for cleaning a conveyance path that conveys a conveyed object, including a main body portion, and a plurality of concave portions provided along the longitudinal direction of the main body portion on one surface of the main body portion and recessed in an arc shape in the thickness direction. The concave portions are arranged such that a cleaning sponge having concave portions extending from one end to the other end of the main body portion is in contact with the outer peripheral surface of a conveyance roller that forms the conveyance path. The cleaning method includes an arranging step of arranging the cleaning sponge, and a cleaning step of moving the cleaning sponge in the width direction of the conveyance path and cleaning the outer peripheral surface of the conveyance roller in a state where the cleaning sponge is arranged in contact with the outer peripheral surface of the conveyance roller that forms the conveyance path by the arranging step.

[0008] In the above cleaning method, since the concave portions provided in the cleaning sponge are arranged on the outer peripheral surface of the conveyance roller, it is possible to easily clean the outer peripheral surface of the conveyance roller only by moving the cleaning sponge in the width direction of the conveyance path in the cleaning step. Further, since the cleaning sponge is provided with a plurality of concave portions, a plurality of conveyance rollers can be simultaneously cleaned in one cleaning step.

[0009] Further, the concave portions have a shape along the outer peripheral shape of the conveyance roller, and the cleaning method includes a moving step of moving the cleaning sponge while rotating the conveyance roller so that the concave portions are in contact with adjacent conveyance rollers after the cleaning step. The moving step may rearrange the cleaning sponge so that the concave portions adjacent to the concave portions moved to the adjacent conveyance roller by the moving step are in contact with the outer peripheral surface of the conveyance roller not cleaned by the cleaning step and exposed by the rotation in the moving step.

[0010] In the above cleaning method, in the moving step, the entire circumference of the conveyance roller can be cleaned in multiple cleaning steps by rotating the conveyance roller. Therefore, it is possible to clean the outer peripheral surface of the conveyance roller without omission over the entire circumference by the cleaning sponge.

[0011] ​Further, the recesses are such that the distance between adjacent recesses increases as it goes from one end to the other end of the main body portion, and in the placement process, the cleaning sponge may be placed in contact with the outer peripheral surface of the conveying roller that forms a conveying path in which the distance between adjacent conveying rollers increases as it goes from one end to the other end in the width direction. With such a cleaning method, even if the conveying path is a curved conveying path in which the distance between adjacent conveying rollers in the conveying direction increases as it goes from one end to the other end in the width direction of the conveying path, the cleaning sponge can be placed on the outer peripheral surface of the conveying roller, facilitating the cleaning of the conveying roller.

[0012] Also, the present invention can be regarded as a cleaning sponge. The cleaning sponge according to one aspect of the present invention includes a main body portion, and a plurality of concave portions provided along the longitudinal direction of the main body portion on one surface of the main body portion and recessed in an arc shape in the thickness direction, and the concave portions may extend from one end to the other end of the main body portion. Such a cleaning sponge enables the concave portions provided on the cleaning sponge to be placed on the outer peripheral surface of the conveying roller, and by simply moving the cleaning sponge in the width direction of the conveying path, it becomes possible to clean from one end to the other end in the longitudinal direction (width direction of the conveying path) of the conveying roller. Further, since the cleaning sponge has a plurality of concave portions, it is possible to clean a plurality of conveying rollers simultaneously.

[0013] Also, the concave portions provided in the cleaning sponge for solving the above problems may be such that the distance from one end to the other end of the main body portion between adjacent concave portions is uniform. The concave portions of the cleaning sponge, where the distance from one end to the other end in the width direction of the main body portion between adjacent concave portions in the longitudinal direction of the main body portion is uniform, can be placed on the outer peripheral surface of the conveying roller that forms a linear conveying path, facilitating the cleaning of the conveying roller that forms a linear conveying path.

[0014] Also, the concave portions provided in the cleaning sponge for solving the above problems may be such that the distance between adjacent concave portions increases as it goes from one end to the other end of the main body portion. With such a cleaning sponge, the concave portions can be placed on the outer peripheral surface of the conveying roller that forms a curved conveying path in which the distance between adjacent conveying rollers in the conveying direction increases as it goes from one end to the other end in the width direction of the conveying path. Therefore, it facilitates the cleaning of the conveying roller that forms a curved conveying path.

[0015] Further, both end portions in the short-side direction of the main body of the sponge for cleaning that solves the above problems may be linear. If both end portions in the short-side direction of the main body are linear, when the sponge for cleaning is moved in the width direction of the conveyance path, it is possible to clean from one end to the other end in the longitudinal direction (width direction of the conveyance path) of the conveyance roller.

[0016] Further, the concave portion of the sponge for cleaning that solves the above problems may have a shape along the outer peripheral surface of the conveyance roller that conveys the conveyed object. Such a sponge for cleaning can be arranged in a state where the concave portion is in contact with the outer peripheral surface of the conveyance roller, and it becomes possible to clean the outer peripheral surface of the conveyance roller only by moving the sponge for cleaning in the width direction of the conveyance path.

[0017] Further, the present invention can also be regarded as a cleaning device. For example, the present invention may be a cleaning device including the sponge for cleaning described in any of the above.

Advantages of the Invention

[0018] According to the present invention, it is possible to easily clean the conveyance path formed by a plurality of conveyance rollers.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

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Figure 8

BEST MODE FOR CARRYING OUT THE INVENTION

[0020] <Embodiment> Hereinafter, embodiments of the present invention will be described. The embodiments shown below are one aspect of the present invention and do not limit the technical scope of the present invention. Each of the embodiments and modifications shown below is suitable for cleaning a conveyance path of a conveyance device used in a food and beverage store that provides various foods and beverages such as sushi, beverages, donburi such as buckwheat and udon, fried foods and tempura, and grilled meat, not only to customers who eat and drink in the store but also to customers who take out food and beverages. Note that the conveyance path formed by the conveyance roller cleaned by the cleaning sponge is not limited to the conveyance path provided in a food and beverage store, and is applicable to the conveyance path of a conveyance device used in a logistics warehouse that conveys conveyed items or a factory that manufactures products.

[0021] In the present embodiment, the conveyance direction of the conveyance path is defined as the direction in which the conveyed item is conveyed. In the conveyance path, the direction connecting the surface on which the conveyed item is placed and the opposite surface is defined as the thickness direction, and the direction orthogonal to both the conveyance direction and the thickness direction is defined as the width direction. The cleaning sponge has a surface facing the conveyance path as the conveyance path facing surface, and the opposite side of the conveyance path facing surface is defined as the non-conveyance path facing surface. In a state where the cleaning sponge is arranged on the conveyance path, the direction corresponding to the conveyance direction of the conveyance path is defined as the longitudinal direction of the cleaning sponge. Also, the direction connecting the conveyance path facing surface and the non-conveyance path facing surface is defined as the thickness direction, and the direction orthogonal to both the longitudinal direction and the thickness direction is defined as the width direction.

[0022] FIG. 1 is a diagram showing a state in which a cleaning sponge 1 according to an embodiment is disposed on a conveyance path 2. The cleaning sponge 1 according to the present embodiment is used for cleaning a conveyance device that conveys food and drink prepared in response to a customer's order from a kitchen of a restaurant to a customer seat or the like. In the present embodiment, the conveyance path 2 is formed by a plurality of conveyance rollers 3. The cleaning sponge 1 is disposed on the conveyance roller 3 as shown in FIG. 1, and cleans the outer peripheral surface of the conveyance roller 3 by moving in the width direction of the conveyance path 2.

[0023] A plurality of conveyance rollers 3 are arranged along the conveyance direction in the conveyance path 2. Note that the longitudinal direction of the conveyance roller 3 coincides with the width direction of the conveyance path 2.

[0024] FIG. 2 is a diagram showing a surface of the cleaning sponge 1 facing the conveyance path. The cleaning sponge 1 is made of a well-known material. For example, the cleaning sponge 1 has a continuous foam body made of a material such as polyurethane foam or polyester. The cleaning sponge 1 includes a main body portion 4 and a concave portion 5 provided on the surface of the main body portion 4 facing the conveyance path and recessed in an arc shape in the thickness direction. Note that the longitudinal direction of the main body portion 4 coincides with the longitudinal direction of the cleaning sponge 1.

[0025] The main body portion 4 has a substantially rectangular parallelepiped shape in which both end portions in the width direction extend linearly. Also, in the present embodiment, the surface of the main body portion 4 that does not face the conveyance path has a planar shape. If both end portions in the width direction of the main body portion 4 are linear, when the cleaning sponge 1 is moved in the width direction of the conveyance path 2, it is possible to clean from one end to the other end in the longitudinal direction of the conveyance roller 3. Note that the main body portion 4 only needs to have linear both end portions in the width direction, and is not limited to a substantially rectangular parallelepiped shape. For example, a shape with chamfered corners may be used. Also, the surface of the main body portion 4 that does not face the conveyance path is not limited to a planar shape. It may have irregularities in the thickness direction.

[0026] ​A plurality of recesses 5 are provided along the longitudinal direction of the main body portion 4 and extend from one end to the other end in the width direction of the main body portion 4. Since the recesses 5 extend from one end to the other end in the width direction of the main body portion 4, it becomes possible to move the cleaning sponge 1 in the width direction of the conveyance path 2, and it becomes possible to clean from one end to the other end in the longitudinal direction of the conveyance roller 3.

[0027] The recess 5 has a shape along the outer peripheral surface of the conveyance roller 3. By having the recess 5 have a shape along the outer peripheral surface of the conveyance roller 3, the recess 5 can be arranged in contact with the outer peripheral surface of the conveyance roller 3, and it becomes possible to clean the outer peripheral surface of the conveyance roller 3 only by moving the cleaning sponge 1 in the width direction of the conveyance path 2.

[0028] The distance between the recesses 5 adjacent to each other in the longitudinal direction of the main body portion 4 of the cleaning sponge 1 is uniform from one end to the other end in the width direction of the main body portion 4. In the linear conveyance path 2, the distance between the conveyance rollers 3 adjacent to each other in the conveyance direction is uniform from one end to the other end in the longitudinal direction of the conveyance roller 3. Therefore, the cleaning sponge 1 in which the distance between the recesses 5 adjacent to each other in the longitudinal direction of the main body portion 4 is uniform from one end to the other end in the width direction of the main body portion 4 can have the recesses 5 arranged on the outer peripheral surface of the conveyance roller 3 forming the linear conveyance path 2. Therefore, the cleaning sponge 1 facilitates the cleaning of the conveyance roller 3 forming the linear conveyance path 2.

[0029] Next, based on FIG. 3, a cleaning method using the cleaning sponge 1 according to the present embodiment will be described. FIG. 3 is a flowchart relating to the cleaning method using the cleaning sponge 1 according to the present embodiment. First, in the placement step, the cleaning sponge 1 is placed so that the concave portion 5 of the cleaning sponge 1 is in contact with the outer peripheral surface of the conveying roller 3 (step S101). Next, in the cleaning step, with the cleaning sponge 1 arranged so as to be in contact with the outer peripheral surface of the conveying roller 3, the cleaning sponge 1 is moved in the width direction of the conveying path 2 to clean the outer peripheral surface of the conveying roller 3 (step S102). Then, in the moving step, while rotating the conveying roller 3 in the conveying direction, the cleaning sponge 1 is moved so that the concave portion 5 comes into contact with the outer peripheral surfaces of the conveying roller 3 that was cleaned in the cleaning step (step S102) and the conveying roller 3 adjacent to it in the conveying direction (step S103). The cleaning sponge 1 moved by the moving step (step S103) is rearranged with the concave portion 5 in contact with the outer peripheral surface of the conveying roller 3. Then, the cleaning step (step S102) and the moving step (step S103) are repeated until all the conveying rollers 3 to be cleaned are completed (step S104).

[0030] Next, based on FIGS. 4 and 5, the cleaning method using the cleaning sponge 1 according to the present embodiment will be described in more detail. FIGS. 4 and 5 are diagrams showing a part of the cleaning method using the cleaning sponge 1 according to the present embodiment. FIG. 4(A) is a side view of the state of cleaning the conveying roller 3 by the cleaning step (step S102) as viewed from the side. FIG. 4(B) is a front view of the state of cleaning the conveying roller 3 in the cleaning step (step S102) as viewed from the conveying direction of the conveying path 2. FIG. 4(C) is a diagram showing the cleaning area 3C to be cleaned by the cleaning step (step S102). FIG. 5(A) is a side view of the state of moving the cleaning sponge 1 by the moving step (step S103) as viewed from the side. FIG. 5(B) is a front view of the state of moving the cleaning sponge 1 in the moving step (step S103) as viewed from the conveying direction of the conveying path 2.

[0031] In the placement step (step S101), the cleaning sponge 1 is placed on the conveying roller 3 such that the recess 5 contacts the outer peripheral surface of the conveying roller 3 as shown in FIG. 4(A). At this time, the region protruding in the thickness direction provided between the recesses 5 adjacent to each other in the longitudinal direction of the main body 4 is arranged between the conveying rollers 3. At this time, the region protruding in the thickness direction provided between the recesses 5 adjacent to each other in the longitudinal direction of the main body 4 is arranged between the conveying rollers 3.

[0032] Next, in the cleaning step (step S102), the outer peripheral surface of the conveying roller 3 is cleaned by moving the cleaning sponge 1 in the width direction of the conveying path 2 (the direction of the arrow shown in FIGS. 4(A) and 4(B)). The cleaning region 3C to be cleaned by the cleaning step (step S102) is the region where the cleaning sponge 1 contacts the conveying roller 3, as shown by the thick line in FIG. 4(C). For example, it is the outer peripheral surface located above the central axis of the conveying roller 3.

[0033] The movement of moving the cleaning sponge 1 in the width direction of the conveying path 2 may be performed once or may be repeated. By repeatedly moving the cleaning sponge 1, the outer peripheral surface of the conveying roller 3 is repeatedly cleaned, and it is possible to remove dirt and the like adhering to the conveying roller 3 as compared with the case where the cleaning sponge 1 is moved only once in the width direction of the conveying path 2. Further, the cleaning sponge 1 is arranged on the outer peripheral surface of the conveying roller 3 and can be easily removed, so it can be easily moved from the conveying roller 3.

[0034] Thereafter, in the moving step (step S103), the cleaning sponge 1 is moved so that the recess 5 provided at the longitudinal end of the cleaning sponge 1 contacts the outer peripheral surfaces of the conveying roller 3 that has been cleaned in the cleaning step (step S102) and the conveying roller 3 adjacent in the conveying direction. At this time, since the recess 5 of the cleaning sponge 1 has a shape along the outer peripheral surface of the conveying roller 3, when the cleaning sponge 1 is lifted and moved to the adjacent conveying roller 3, the conveying roller 3 with which the recess 5 was in contact (cleaned in the cleaning step (step S102)) rotates in the conveying direction (the direction of the arrow shown in FIGS. 5(A) and 5(B)).

[0035] FIG. 6 is a diagram showing the cleaning area 3C in the moving step (step S103). FIG. 6(A) is a diagram showing the cleaning area 3C in a state where the cleaning sponge 1 is being moved. FIG. 6(B) is a diagram showing the cleaning area 3C after the cleaning sponge 1 has been moved. As described above, in the moving step (step S103), when the cleaning sponge 1 is moved, the conveying roller 3 cleaned in the cleaning step (step S102) rotates. Therefore, as shown in FIG. 6(A), the cleaning area 3C rotates in the conveying direction (the direction of the arrow shown in FIG. 6(A)). After the movement of the cleaning sponge 1, the cleaning area 3C cleaned in the cleaning step (step S102) moves to the opposite side of the surface of the cleaning sponge 1 facing the conveying path, as shown in FIG. 6(B). Thus, the moving step (step S103) exposes the outer peripheral surface of the conveying roller 3 that the recess 5 did not contact in the cleaning step (step S102) to the surface of the cleaning sponge 1 facing the conveying path. Note that the cleaning area 3C cleaned in the cleaning step (step S102) may be located on the surface of the cleaning sponge 1 facing the conveying path after the cleaning sponge 1 has moved, or an area not cleaned in the cleaning step (step S102) may be located on a part of the surface of the cleaning sponge 1 facing the conveying path.

[0036] Here, the cleaning sponge 1 has a plurality of recesses 5 in the longitudinal direction. In the moving step (step S103), the recess 5 provided at the longitudinal end of the main body 4 moves to the conveying roller 3 cleaned in the cleaning step (step S102) and the conveying roller 3 adjacent to it in the conveying direction. As a result, the second recess 5 provided from the longitudinal end moves to the conveying roller 3 cleaned by the recess 5 provided at the longitudinal end. In other words, the recesses 5 other than the recesses 5 provided at the end of the main body 4 on the side where the cleaning sponge 1 moves are moved by the moving step (step S103) and are re-arranged to contact the outer peripheral surface of the conveying roller 3 cleaned by the adjacent recess 5 in the longitudinal direction of the main body 4. Then, the area of the outer peripheral surface of the conveying roller 3 that was not cleaned in the cleaning step (step S102) is cleaned. Therefore, the conveying roller 3 is cleaned multiple times by the plurality of recesses 5 provided in the cleaning sponge 1. As a result, it becomes possible to clean the outer peripheral surface of the conveying roller 3 without omission over the entire circumference by the cleaning sponge 1 to be cleaned without omission over the entire circumference.

[0037] Note that the cleaning area 3C cleaned in one cleaning step (step S102) does not have to be the outer peripheral surface above the central axis of the conveying roller 3. It is only necessary that the entire circumference of the outer peripheral surface of the conveying roller 3 is cleaned while repeating the moving step (step S103) and the cleaning step (step S102). For example, the cleaning area 3C cleaned in one cleaning step (step S102) may be an area obtained by equally dividing the entire circumference of the conveying roller 3 by the number of recesses 5 provided in the cleaning sponge 1, or may be an area obtained by equally dividing the entire circumference of the conveying roller 3 by a number less than the number of recesses 5 provided in the cleaning sponge 1.

[0038] Thus, since the cleaning sponge 1 according to the present embodiment includes a plurality of recesses 5, it is possible to simultaneously clean a plurality of conveying rollers 3 in a single cleaning process. Therefore, it is possible to suppress the time and labor required for cleaning, and easily clean the conveying path 2 formed by the plurality of conveying rollers 3. Further, in the moving process (step S103), by rotating the conveying roller 3, it is possible to clean the entire circumference of the conveying roller 3 in a plurality of cleaning processes. Therefore, even when the object to be cleaned by the cleaning sponge 1 cannot be wrapped by the cleaning sponge 1, it is possible to easily clean the entire circumference of the outer peripheral surface of the conveying roller 3.

[0039] <Modification Example> FIG. 7 is a view showing a non-conveying-path facing surface of the cleaning sponge 1 according to the modification example. In the cleaning sponge 1 according to the present modification example, the distance between adjacent recesses 5 in the main body portion 4 increases from one end to the other end of the main body portion 4. Other configurations are the same as those of the above-described embodiment.

[0040] The cleaning sponge 1 according to the modification example enables the recesses 5 to be arranged on the outer peripheral surface of the conveying roller 3 that forms a curved conveying path 2 in which the distance between adjacent conveying rollers 3 in the conveying direction becomes longer from one end to the other end in the width direction of the conveying path 2.

[0041] FIG. 8 is a view showing a cleaning sponge 1 according to a modified example disposed on a curved conveyance path 2. The conveyance path 2 is not always straight and may branch in multiple directions. In such a case, the conveyance path 2 is configured by combining curved conveyance paths 2. The conveyance rollers 3 constituting such a curved conveyance path 2 have a distance between adjacent conveyance rollers 3 in the conveyance direction that becomes longer from one end to the other end in the width direction of the conveyance path 2. Therefore, in the cleaning sponge 1 according to the modified example, since the distance between the recesses 5 adjacent to each other in the longitudinal direction of the main body portion 4 becomes longer from one end to the other end of the main body portion 4, the recesses 5 can be disposed on the outer peripheral surface of the conveyance roller 3 forming the curved conveyance path 2. For this reason, in the arrangement step (step S101), the cleaning sponge 1 can be easily arranged on the conveyance roller 3 forming the curved conveyance path 2, facilitating the cleaning of the conveyance roller 3 forming the curved conveyance path 2. Note that the cleaning method of the cleaning sponge 1 according to the modified example is the same as that of the cleaning sponge 1 according to the embodiment.

[0042] <Other Embodiments> The conveyance roller 3 may be cleaned by the cleaning device including the cleaning sponge 1 in the present embodiment. For example, a device that moves the cleaning sponge 1 using power such as a motor can be mentioned.

[0043] The features included in each of the above-disclosed embodiments and their modified examples can be combined with each other.

Description of Reference Numerals

[0044] 1 ·· Cleaning sponge 2 ·· Conveyance path 3 ·· Conveyance roller 3C ·· Cleaning area 4 ·· Main body portion 5 ·· Recess

Claims

1. A cleaning method for cleaning a conveyance path for conveying an object to be conveyed, comprising: a main body portion; and, on one surface of the main body portion, a plurality of concave portions provided along the longitudinal direction of the main body portion and recessed in an arc shape in the thickness direction, the concave portions being arranged such that the concave portions of a cleaning sponge extending from one end to the other end of the main body portion are in contact with the outer peripheral surface of a conveyance roller forming the conveyance path; a cleaning step of moving the cleaning sponge in the width direction of the conveyance path in a state where the cleaning sponge is arranged so as to be in contact with the outer peripheral surface of the conveyance roller forming the conveyance path by the arranging step, and cleaning the outer peripheral surface of the conveyance roller; A cleaning method.

2. The concave portion has a shape along the outer peripheral shape of the conveyance roller, after the cleaning step, including a moving step of moving the cleaning sponge so that the concave portion is in contact with an adjacent conveyance roller while rotating the conveyance roller, the moving step rearranges the cleaning sponge so that the concave portion adjacent to the concave portion moved to the adjacent conveyance roller by the moving step is in contact with the outer peripheral surface of the conveyance roller that was not cleaned by the cleaning step and was exposed by the rotation of the moving step; The cleaning method according to claim 1.

3. The distance between adjacent concave portions becomes longer as it goes from one end to the other end of the main body portion, the arranging step arranges the cleaning sponge so as to be in contact with the outer peripheral surface of the conveyance roller forming the conveyance path, where the distance between the conveyance roller and an adjacent conveyance roller becomes longer from one end to the other end in the width direction; The cleaning method according to claim 1 or 2.

4. a main body portion; on one surface of the main body portion, a plurality of concave portions provided along the longitudinal direction of the main body portion and recessed in an arc shape in the thickness direction; the concave portions extend from one end to the other end of the main body portion; A cleaning sponge.

5. The distance between adjacent concave portions along the main body portion from one end to the other end is uniform, The cleaning sponge according to claim 4.

6. The distance between adjacent concave portions becomes longer as it goes from one end to the other end of the main body portion, The cleaning sponge according to claim 4.

7. Both end portions in the short side direction of the main body portion are linear, The cleaning sponge according to any one of claims 4 to 6.

8. The concave portion has a shape along the outer peripheral surface of a conveyance roller for conveying an object to be conveyed. The sponge according to any one of claims 4 to 6.

9. A cleaning device comprising the cleaning sponge according to any one of claims 4 to 6.

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