Protective cap

Abstract

A protective cap for installing on a powered rotating tool for driving screws, wherein the protective cap comprises a main body, and a cushion part which is disposed on the main body and is made from a material having a lower degree of rubber hardness than the main body, and the protective cap is provided with a through-hole that penetrates from the upper surface of the cushion part to the lower surface of the main body.

Description

[Technical Field]

[0001] The present invention relates to a protective cap. [Background technology]

[0002] BACKGROUND ART A conventionally known method for installing plate-like materials such as ceiling panels, flooring materials, and wall materials involves driving screws into the surface side of the plate-like material to fix it to a base material or the like.

[0003] However, when a power rotary screw tool is used to fasten a plate-like object with a screw, a circular or arcuate dent corresponding to the shape of the tip of the rotary tool may occur in the plate-like object. Such dents occur, for example, when the screw is driven too deeply or when the rotary tool is tilted while driving the screw. In particular, in recent years, there has been an increase in the use of lighter, i.e., softer, plate-like objects for ceiling panels, in order to prevent the ceiling from falling, making the above-mentioned dents more likely to occur.

[0004] When circular or other dents occur in plate-like objects such as ceiling panels, the dents become conspicuous when exposed to oblique light, resulting in a poor appearance. To prevent circular or other dents from occurring, it is necessary to work carefully so as not to overdrive the screws and to avoid tilting the power rotary tool used to drive the screws, which results in a problem of reduced work speed.

[0005] Therefore, in order to prevent dents from occurring in the plate-like body, protective caps that can be attached to power rotary tools used for driving screws have been studied.

[0006] For example, Patent Document 1 discloses an attachment for a power rotary tool, which is characterized by comprising a face plate portion and a mounting portion, and having a soft portion on the surface of the face plate portion. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2009-39789 Summary of the Invention [Problem to be solved by the invention]

[0008] However, in recent years, efforts have been made to further reduce the weight of plate-like objects such as ceiling panels, making them particularly susceptible to dents. For this reason, the power rotary tool attachment disclosed in Patent Document 1 sometimes fails to sufficiently prevent circular or other dents from forming in the plate-like object.

[0009] In view of the problems with the prior art described above, the present invention aims to provide a protective cap that can prevent circular or arch-shaped dents from occurring in a plate-like body when screws are driven with a power rotary tool for driving screws. [Means for solving the problem]

[0010] In order to solve the above problems, the present invention provides a protective cap to be attached to a power rotary tool for driving screws, The protective cap is a main body portion; and a cushion portion disposed above the main body portion and made of a material having a rubber hardness lower than that of the main body portion, A protective cap may be provided that includes a through hole that passes through between the upper surface of the cushion portion and the lower surface of the main body portion. [Effects of the Invention]

[0011] According to the present invention, a protective cap can be provided that can prevent circular or arched dents from occurring in a plate-like body when screws are driven with a power rotary tool for driving screws. [Brief explanation of the drawings]

[0012] [Figure 1A] FIG. 1A is an explanatory diagram of a protective cap according to an embodiment of the present invention. [Figure 1B]FIG. 1B is an explanatory diagram of a protective cap according to an embodiment of the present invention. [Figure 2] FIG. 2 is an explanatory diagram showing a protective cap according to an embodiment of the present invention attached to a power rotary tool for driving screws. [Figure 3] FIG. 3 is an explanatory diagram of a protective cap according to an embodiment of the present invention. [Figure 4A] FIG. 4A is an explanatory diagram of a groove provided on the outer surface. [Figure 4B] FIG. 4B is an explanatory diagram of a groove provided on the outer surface. [Figure 5A] FIG. 5A is an explanatory diagram of a fixing member. [Figure 5B] FIG. 5B is an explanatory diagram of the fixing member. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments for carrying out the present invention will be described, but the present invention is not limited to the following embodiments, and various modifications and substitutions can be made to the following embodiments without departing from the scope of the present invention. [Protective cap] The protective cap of this embodiment is a protective cap attached to a power rotary tool for driving screws. Here, the term "screw" refers to any screw used to fasten a plate-like object, such as an interior wall panel or ceiling panel, to a substrate. The power rotary tool for driving screws (hereinafter also referred to simply as "rotary tool") has a bit fixing part for fixing a bit having a tip shape corresponding to a slot or cross shape provided on the head of the screw. The tool rotates the bit fixing part using power from a motor or other device provided inside the tool, thereby rotating the screw via the bit and driving the screw into a plate-like object. (1) Outer shape of the protective cap Fig. 1A shows a perspective view of the protective cap of this embodiment, and Fig. 1B shows a cross-sectional view of the protective cap of this embodiment, taken along line AA in Fig. 1A.

[0014] The outer shape of the protective cap 10 of this embodiment is not particularly limited, but may be, for example, a columnar shape, and is preferably a cylindrical shape as shown in Fig. 1A. As will be described later, the protective cap 10 of this embodiment may have, for example, grooves 41 on the outer surface 113 (113A, 113B) (see Figs. 4A and 4B). Therefore, the columnar shape and cylindrical shape referred to here are not limited to shapes in the strict geometric sense.

[0015] 1A and 1B, the protective cap 10 can have an upper surface 111, a lower surface 112, and a through-hole 12 that penetrates between the upper surface 111 and the lower surface 112. The upper surface 111 is the upper surface 1022 of the cushion portion 102, and the lower surface 112 is also the lower surface of the main body portion 101.

[0016] 2 is an explanatory diagram showing the protective cap 10 of this embodiment attached to the rotary tool 20. FIG. 2 corresponds to a cross-sectional view of the protective cap 10 attached to the rotary tool 20, taken along a plane passing through the central axis CA of the protective cap 10.

[0017] 2, the protective cap 10 of this embodiment can be attached to the tip portion 21 of the rotary tool 20. In this case, the protective cap 10 can be attached to the tip portion 21 of the rotary tool 20 by inserting the tip portion 21 of the rotary tool 20 into the through-hole 12 from the lower surface 112 side of the protective cap 10.

[0018] The tip 21 of the rotary tool 20 is a bit fixing portion (chuck portion) to which the bit 22 is attached, and is the portion of the rotary tool 20 that comes closest to a plate-like body (hereinafter not shown) excluding the bit 22 when driving a screw using the rotary tool 20. By attaching the protective cap 10 to the tip 21 of the rotary tool 20, it is possible to prevent the surface 21A of the tip 21 of the rotary tool 20 that faces the plate-like body from coming into direct contact with the plate-like body when driving a screw into the plate-like body. This makes it possible to prevent circular or arch-shaped depressions from being formed in the plate-like body.

[0019] The size of the protective cap 10 of this embodiment is not particularly limited, but for example, the maximum diameter D10 (see FIG. 1A) is preferably 24 mm or more and 50 mm or less, and more preferably 25 mm or more and 28 mm or less. By making the maximum diameter D10 24 mm or more, the protective cap 10 can be easily attached to the tip 21 of the rotary tool 20, and when it comes into contact with a plate-like object, the pressing force of the rotary tool 20 can be dispersed, sufficiently preventing the plate-like object from being dented. Furthermore, by making the maximum diameter D10 50 mm or less, the protective cap 10 can be used in narrow places such as inside corners, and the screw fastening position is not obstructed from view, thereby not reducing workability.

[0020] The maximum diameter D10 refers to the diameter at the point where the outer shape is circular and the diameter is greatest in a cross section perpendicular to the central axis CA.

[0021] The thickness H10 of the protective cap 10 (see FIG. 1B) is preferably selected so that it does not easily come off when attached to the rotary tool 20 and so that it has a sufficient thickness to cover the surface 21A of the tip 21 of the rotary tool 20 (see FIG. 2) that faces the plate-like body. Therefore, the thickness H10 of the protective cap 10 is preferably 11 mm or more and 20 mm or less. In particular, the thickness H10 of the protective cap 10 is more preferably 11 mm or more and 16 mm or less.

[0022] Each part of the protective cap 10 of this embodiment will be described below. (2) Through holes As shown in Fig. 1B, the through hole 12 is preferably arranged along the central axis CA of the protective cap 10. The through hole 12 is a hole for inserting a rotary tool 20 (see Fig. 2). As shown in Figs. 1B and 2, the through hole 12 can have a first opening 121 on the upper surface 111 side for exposing a bit 22 (see Fig. 2) of the rotary tool 20, and a second opening 122 on the lower surface 112 side for inserting the rotary tool 20.

[0023] Through hole 12 can be configured so that a diameter D121 of first opening 121, which is an opening on the upper surface 111 side, is smaller than a diameter D122 of second opening 122 on the lower surface 112 side. Therefore, through hole 12 can have a structure in which, for example, cylindrical first through hole 12A and second through hole 12B with different diameters are connected.

[0024] By making the diameter D121 of the first opening 121 smaller than the diameter D122 of the second opening 122, the bit 22 can be exposed as shown in Figure 2, while the surface 21A of the tip 21 of the rotary tool 20 facing the plate-shaped body can be covered by the protective cap 10.

[0025] The length H12A of the first through hole 12A (see FIG. 1B) is not particularly limited. The length H12A of the first through hole 12A is also the thickness of the member covering the surface 21A of the tip portion 21 of the rotary tool 20 that faces the plate-like body, so it is preferable to select the length H12A so that the plate-like body can be sufficiently protected. The length H12A of the first through hole 12A can be, for example, 2 mm or more and 8 mm or less. (3) Cushion part

[0026] 1A and 1B, the protective cap 10 of this embodiment can have a main body portion 101 and a cushion portion 102 that is disposed above the main body portion 101 and is made of a material with a lower rubber hardness than the main body portion 101. The aforementioned through-hole 12 is provided so as to penetrate the main body portion 101 and the cushion portion 102.

[0027] In this way, by providing the cushion portion 102, even when the upper surface 111 of the protective cap 10 comes into contact with the plate-like body, it is possible to prevent the plate-like body from being dented.

[0028] 1A and 1B, the cushion portion 102 is preferably provided so as to cover the entire upper surface 111 of the protective cap 10. In other words, it is preferable that the upper surface 1022 of the cushion portion 102 and the upper surface 111 of the protective cap 10 coincide with each other.

[0029] The cushion part 102 and the main body part 101 can be joined together to form an integrally molded product, or they can be configured to be bonded together with an adhesive, adhesive tape, etc. The cushion part 102 and the main body part 101 can also be configured to be detachable, and for example, an adhesive or adhesive tape that can detachably bond the two parts can be selected.

[0030] The joint surfaces between the cushion portion 102 and the main body portion 101, that is, the lower surface 1021 of the cushion portion 102 and the upper surface 1011 of the main body portion 101, can each be a flat horizontal surface to increase the joint strength between the two members.

[0031] The shape of the upper surface 1022 of the cushion portion 102 is not particularly limited, but can be a flat horizontal surface, that is, a plane, as shown in FIGS. 1A and 1B.

[0032] The term "flat" as used above means that no irregularities are intentionally formed, and does not exclude irregularities resulting from the manufacturing process, etc. Furthermore, the horizontal plane is preferably a plane perpendicular to the central axis CA, but this does not mean orthogonal (right angle) in the strict geometric sense, and does not exclude errors, etc., resulting from the manufacturing process, etc.

[0033] Cushion portion 102 can contain or be made of a material with a lower rubber hardness than main body portion 101. Cushion portion 102 can be made of the same elastic material as main body portion 101, or can be made of materials such as felt, plastic foam, or gel.

[0034] The rubber hardness of the cushion portion 102 is preferably 30 or more and 60 or less.

[0035] Furthermore, it is preferable that the rubber hardness of cushion portion 102 is at least 10 lower than the rubber hardness of the plate-shaped body into which the screw is driven. Therefore, when the rubber hardness of cushion portion 102 is H102 and the rubber hardness of the plate-shaped body is HB, it is preferable that HB-H102≧10. Note that if the rubber hardness of the plate-shaped body varies depending on the location, the rubber hardness HB of the plate-shaped body refers to the rubber hardness of the area of ​​the plate-shaped body where the screw is driven.

[0036] For example, if the rubber hardness HB of the plate-shaped body is 50, the rubber hardness of the cushion portion 102 is preferably 40 or less. The value 40 is obtained by subtracting the value 10 from the rubber hardness HB of the plate-shaped body.

[0037] The cushion portion 102 may be provided on its surface with a resin sheet for the purpose of preventing dirt from adhering thereto, or a rubber sheet having the same hardness as the main body portion 101 .

[0038] In this specification, rubber hardness refers to Type A durometer hardness, i.e., rubber hardness measured by a Type A durometer hardness test specified in JIS K 6253-3 (2012). Note that even when the cushion portion 102 is made of felt or the like, the rubber hardness can be evaluated by a Type A durometer hardness test.

[0039] It is preferable that the color of the upper surface 111 of the protective cap 10 is close to the color of the plate-like body. This is because even if part of the protective cap 10 adheres to the plate-like body due to friction or the like, the appearance is prevented from being impaired if the color of the protective cap 10 is close to the color of the plate-like body. Generally, plate-like bodies such as ceiling boards, flooring materials, and wall materials are often close to gray or white, so it is preferable that the color of the upper surface 111 of the protective cap 10 is also gray or white. For this reason, it is preferable that the upper surface 1022 of the cushion part 102 also has the above-mentioned color tone.

[0040] The outer surface 113B of the cushion portion 102 and the outer surface 113A of the main body portion 101 may be positioned at the same distance from the central axis CA as shown in FIG. 1B.

[0041] However, the present invention is not limited to this configuration, and for example, as shown in Fig. 3, the outer surface 113B of the cushion portion 102 may be positioned more outward than the outer surface 113A of the main body portion 101. The term "outward" here refers to the direction away from the central axis CA of the protective cap 10.

[0042] By positioning outer surface 113B of cushion portion 102 outward of outer surface 113A of main body 101, cushion portion 102 can be easily deformed downward, i.e., toward bottom surface 112. Therefore, even when screws are driven in a state in which the rotation axis of bit 22 of rotary tool 20 is tilted from a direction perpendicular to the plate-like body (hereinafter also referred to as "a state in which rotary tool 20 is tilted") and the outer periphery of top surface 111 comes into contact with the plate-like body, it is possible to particularly prevent dents from occurring in the plate-like body. (4) Main body 2, the main body 101 is disposed below the cushion 102, and is a member that comes into contact with the tip 21 when the protective cap 10 is attached to the tip 21 of the rotary tool 20. That is, the protective cap 10 of this embodiment can have a structure in which the main body 101 and the cushion 102 are stacked.

[0043] The material from which the main body 101 is made is not particularly limited, but it preferably contains an elastic material, and more preferably is made of an elastic material, from the viewpoint of deforming to match the shape of the tip 21 of the rotary tool 20 inserted into the through-hole 12 and protecting the plate-like body. Examples of elastic materials include rubber, and silicone rubber is particularly preferred. This is because silicone rubber can prevent chips produced when screws are driven into the plate-like body from adhering to the protective cap 10, preventing the surface of the plate-like body from becoming dirty.

[0044] In addition to the above-mentioned silicone rubber, the elastic material contained in the protective cap 10 may also be, for example, natural rubber, nitrile rubber, silicon rubber, fluororubber, urethane rubber, acrylic rubber, isoprene rubber, styrene rubber, butadiene rubber, butyl rubber, isobutylene-isoprene rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, ethylene-vinyl acetate rubber, chloroprene rubber, Hypalon (chlorosulfonated polyethylene), chlorinated polyethylene rubber, epichlorohydrin rubber, polysulfide rubber, etc.

[0045] The rubber hardness of the main body 101 is preferably 30 or more and 90 or less, and more preferably 50 or more and 80 or less.

[0046] This is because, when the rubber hardness is within the above range, it can be easily deformed to fit the shape of the tip 21 of the rotary tool 20 and can be fixed to the rotary tool 20. Also, when the rubber hardness is within the above range, it exhibits sufficient cushioning properties and can particularly prevent dents from occurring in the plate-like body.

[0047] (5) Groove The protective cap 10 of this embodiment may also have a groove 41 formed along the circumferential direction on the outer surface 113A of the main body 101. Figures 4A and 4B show a perspective view and a cross-sectional view, respectively, of the case where the groove 41 is provided. Figure 4B is a cross-sectional view taken along line CC in Figure 4A.

[0048] The provision of groove 41 allows cushion portion 102 to easily deform downward, i.e., toward lower surface 112. Therefore, even when screws are driven with rotary tool 20 tilted and the outer periphery of upper surface 111 comes into contact with the plate-like body, it is possible to particularly prevent dents from occurring in the plate-like body.

[0049] Although there are no particular limitations on the height position of groove portion 41, or the depth D41, width W41, etc. of groove portion 41, it is preferable to select the size and position thereof so that cushion portion 102 can easily deform toward groove portion 41. Groove portion 41 is preferably provided so as to be in contact with upper surface 1011 of main body portion 101, for example, i.e., so as to be exposed from upper surface 1011 of main body portion 101.

[0050] For example, the depth D41 of the groove 41 can be 2 mm, and the width W41 can be 2 mm.

[0051] In this embodiment, the depth D41 of the groove 41 is preferably 1 mm or more. The depth D41 of the groove 41 is preferably half or less of the thickness of the protective cap 10 at the portion where the groove 41 is provided. The thickness of the protective cap 10 at the portion where the groove 41 is provided means the distance between the inner circumferential surface 131 and the outer surface 113 of the through hole 12 at the portion where the groove 41 is provided.

[0052] 4B, the outer surface 113B of the cushion part 102 and the outer surface 113A of the main body part 101 are located on the same plane, but this is not limited to this. For example, as described above, the outer surface 113B of the cushion part 102 may be located more outward than the outer surface 113A of the main body part 101.

[0053] 4A and 4B show an example in which groove portion 41 is provided so as to contact upper surface 1011 of main body portion 101, i.e., an example in which groove portion 41 is provided so as to include the boundary between cushion portion 102 and main body portion 101, but this is not limited to this form. Groove portion 41 can also be provided closer to lower surface 112 than in the example shown in FIGS. 4A and 4B. In this case, a first outer peripheral region including cushion portion 102 and a portion of main body portion 101 above groove portion 41 is disposed above groove portion 41. In addition, a second outer peripheral region which is a portion of main body portion 101 below groove portion 41 is disposed below groove portion 41.

[0054] In this case, the outer surface of the first outer peripheral region and the outer surface of the second outer peripheral region may be positioned at the same distance from the central axis CA. Alternatively, the outer surface of the first outer peripheral region may be positioned further outward than the outer surface of the second outer peripheral region. Here, "outward" refers to the direction away from the central axis CA of the protective cap 10.

[0055] By positioning the outer surface of the first outer peripheral region outward from the outer surface of the second outer peripheral region, the first outer peripheral region can be easily deformed downward, i.e., toward the lower surface 112. Therefore, even when screws are driven with the rotary tool 20 tilted and the outer periphery of the upper surface 111 comes into contact with the plate-like body, it is possible to particularly prevent dents from being formed in the plate-like body.

[0056] In the above configuration, there is no particular limitation on the shape of the cushion portion 102. For example, the cushion portion 102 may be shaped to cover the flat portion of the upper surface 1011 of the main body portion 101, to overlap the groove portion 41, or to cover the outer surface of the first outer peripheral region.

[0057] 4A and 4B, the groove portion 41 may have a communication hole 42 that connects the groove portion 41 and the through-hole 12. By providing the communication hole 42, the cushion portion 102 can be easily deformed, particularly downward. This makes it possible to particularly prevent dents from being formed in the plate-like body. (6) Fixing member The protective cap 10 of this embodiment may also have a fixing member 50 including a plurality of protrusions 51 on the inner circumferential surface 131 of the through-hole 12 .

[0058] The outer diameter of the tip portion 21 of the rotary tool 20 may differ depending on the manufacturer of the rotary tool 20. If the inner diameter of the through hole 12 of the protective cap 10 is larger than the outer diameter of the tip portion 21 of the rotary tool 20, a gap may occur between the inner peripheral surface of the protective cap 10 and the tip portion 21, making it impossible to fix the protective cap 10 to the tip portion 21.

[0059] Therefore, if the outer diameter of the tip 21 of the rotary tool 20 and the inner diameter of the through hole 12 of the protective cap 10 are significantly different, the position of the protective cap 10 may shift during use of the rotary tool 20, and the plate-shaped body may not be adequately protected.

[0060] Therefore, it is preferable that the protective cap 10 of this embodiment has a fixing member 50 including multiple protrusions 51 on the inner surface 131 of the through hole 12, particularly on the inner surface (inner side) of the second through hole 12B, as described above, so that it can be attached regardless of the size of the tip 21 of the rotary tool 20.

[0061] The fixing member 50 will be described with reference to Figures 5A and 5B. Figure 5A is a bottom view of the protective cap 10 having the fixing member 50, and corresponds to a view taken along the block arrow B in Figure 1A. Figure 5B is a cross-sectional view of the protective cap 10 having the fixing member 50 taken along line AA (see Figure 1A).

[0062] 5A, the fixing member 50 can include a plurality of protrusions 51, for example, as shown in Fig. 5A, and the protrusions 51 can be provided in multiple numbers along the circumferential direction of the inner circumferential surface 131 of the through hole 12. By providing a plurality of protrusions 51 on the inner circumferential surface 131 of the through hole 12 in this manner, when the rotating tool 20 is inserted into the through hole 12 from the lower surface 112 of the protective cap 10, the protrusions 51 can be configured to contract according to the size of the tip end 21 indicated by the two-dot chain line and come into close contact with the outer surface of the tip end 21. Therefore, the height H51, etc. of the protrusions 51 can be selected according to the range of sizes of the tip end 21 of the corresponding rotating tool 20.

[0063] In FIG. 5A, the size and shape of the protrusions 51, such as the height, are constant, but the fixing member 50 can also include protrusions 51 with different heights and shapes.

[0064] The fixing member 50 may be provided on at least a portion of the inner surface 131 of the through hole 12, but in order to improve adhesion to the tip portion 21, it is preferable that the fixing member 50 be provided on the entire inner surface 131 of the second through hole 12B, as shown in Figure 5B, for example. (7) Chamfered part The protective cap 10 of this embodiment may also have a chamfered portion (not shown) between the upper surface 1011 of the main body 101 and the outer surface 113 (113A). The chamfered portion may be formed around the entire outer periphery of the upper surface 1011 of the main body 101.

[0065] The shape of the chamfered portion is not particularly limited, but for example, in a cross section passing through the central axis CA of the protective cap 10, the chamfered portion may have an arc shape or a linear shape.

[0066] Since the main body 101 has a chamfered portion between the upper surface 1011 and the outer surface 113 (113A), even when the rotary tool 20 (see Figure 2) is tilted while driving a screw and the chamfered portion comes into contact with the plate-shaped body, it is possible to prevent a dent from occurring in the plate-shaped body.

[0067] When main body 101 has a chamfered portion, cushion 102 is preferably provided so as to cover not only the flat portion of upper surface 1011 of main body 101 but also at least a part of the chamfered portion.

[0068] Although the protective cap has been described above in terms of the embodiments, the present invention is not limited to the above embodiments, etc. Various modifications and changes are possible within the scope of the gist of the present invention as set forth in the claims.

[0069] This application claims priority based on Japanese Patent Application No. 2022-033933, filed with the Japan Patent Office on March 4, 2022, the entire contents of which are incorporated herein by reference. [Explanation of symbols]

[0070] 10 Protective Cap H10 height D10 diameter CA center axis 111 Top surface 112 Bottom surface 113 External surface 12 Through holes 12A 1st through hole H12A Length 12B 2nd through hole 121 First Opening D121 diameter 122 Second Opening D122 diameter 131 Inner surface 101 Main body 1011 Top surface 113A External surface 102 Cushion part 1021 Bottom surface 1022 Top surface 113B External surface 20 Rotary tools 21 Tip 22-bit 21A side 41 Groove 42 Communication hole D41 depth W41 width 50 Fixing member 51 Protrusion H51 height

Claims

1. A protective cap to be attached to a power rotary tool for driving screws, The protective cap is a main body portion; and a cushion portion disposed above the main body portion and made of a material having a rubber hardness lower than that of the main body portion, a through hole penetrating between an upper surface of the cushion portion and a lower surface of the main body portion; The protective cap has a groove formed in the circumferential direction on the outer surface of the main body.

2. A protective cap to be attached to a power rotary tool for driving screws, The protective cap is a main body portion; and a cushion portion disposed above the main body portion and made of a material having a rubber hardness lower than that of the main body portion, a through hole penetrating between an upper surface of the cushion portion and a lower surface of the main body portion; A protective cap having a fixing member including a plurality of protrusions on the inner peripheral surface of the through hole.

3. A protective cap to be attached to a power rotary tool for driving screws, The protective cap is a main body portion; and a cushion portion disposed above the main body portion and made of a material having a rubber hardness lower than that of the main body portion, a through hole penetrating between an upper surface of the cushion portion and a lower surface of the main body portion; A protective cap, wherein the rubber hardness of the main body is 30 or more and 90 or less.

4. The protective cap according to claim 1 , wherein the upper surface of the cushion portion is flat.

5. 4. The protective cap according to claim 2, wherein the body portion has an outer surface on which a groove is formed along a circumferential direction.

6. The protective cap according to claim 1 or 3, further comprising a fixing member having a plurality of protrusions on an inner peripheral surface of the through hole.

7. 3. The protective cap according to claim 1, wherein the main body has a rubber hardness of 30 or more and 90 or less.

8. 4. The protective cap according to claim 1, wherein the cushion portion has a rubber hardness of 30 or more and 60 or less.

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