Protective member and tool set

A protective member with an insertion and engagement design for impact tools enhances finger safety by securely attaching to the tool's gripping portion, addressing the need for finger protection in impact tools.

JP2026019690AActive Publication Date: 2026-02-05SHINAGAWA FURNACE CO LTD +1
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Patent Information

Application Number
JP2024121427
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-07-26
Publication Date
2026-02-05
Estimated Expiration
2044-07-26

AI Technical Summary

Technical Problem

There is a need to protect the fingers that grip impact tools from injury during use.

Method used

A protective member is attached to the impact tool, comprising a protective member main body with an insertion portion, flange portion, and engagement portion, designed to fit around and engage with the tool's gripping portion, using an intervening member to enhance the engagement and prevent axial movement.

Benefits of technology

The protective member effectively safeguards the fingers by enhancing the engagement with the tool's gripping portion, preventing axial movement and providing a secure fit, thus protecting against injuries.

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Abstract

To protect fingers holding a tool.SOLUTION: According to an aspect of the present invention, there is provided a protective member which is attached to a striking-type tool having a blade portion and a gripping portion and protects fingers gripping the gripping portion, the protective member including a protective member main body, the protective member main body including an insertion portion, a flange portion, and an engagement portion, the insertion portion being formed so as to allow the gripping portion of the tool to be inserted thereinto, the flange portion being provided so as to surround the insertion portion, and the engagement portion being configured to engage with the gripping portion of the tool.SELECTED DRAWING: Figure 1
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Description

[Technical Field]

[0001] The present invention relates to a protective member and a tool set. [Background technology]

[0002] Patent Document 1 describes a handheld tool. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-098532 Summary of the Invention [Problem to be solved by the invention]

[0004] In tools that apply impact force, there is a need to protect the fingers that grip the tool.

[0005] The present invention aims to protect the fingers that grip the tool. [Means for solving the problem]

[0006] According to the present invention, there is provided a protective member that is attached to an impact tool having a blade portion and a gripping portion and that protects fingers gripping the gripping portion, the protective member comprising a protective member main body, the protective member main body having an insertion portion, a flange portion, and an engagement portion, the insertion portion being formed so that the gripping portion of the tool can be inserted into it, the flange portion being arranged to surround the insertion portion, and the engagement portion being configured to engage with the gripping portion of the tool.

[0007] According to the present invention, it is possible to protect the fingers that grip the tool. [Brief explanation of the drawings]

[0008] [Figure 1]1A and 1B are diagrams showing a protective member 8 and a tool set 100 according to an embodiment. [Figure 2] FIG. 2A is a plan view showing the tool 1 of the embodiment, FIG. 2B is a side view thereof, and FIG. 2C is a bottom view thereof. [Figure 3] 3A is a plan view showing the protection member main body 10, FIG. 3B is a cross-sectional view taken along line AA in FIG. 3A, and FIG. 3C is a cross-sectional view taken along line BB in FIG. 3A. [Figure 4] FIG. 4A is a plan view showing the interposition member 20, and FIG. 4B is a cross-sectional view taken along line CC in FIG. 4A. [Figure 5] FIG. 5A shows the protective member 8 (cross-sectional view) in a state before it is attached to the tool 1, and FIG. 5B shows it in a state after it has been attached. [Figure 6] FIG. 6A is a bottom view of the protective member 8 attached to the tool 1, and FIG. 6B is a bottom view of the protective member main body 10 rotated. [Figure 7] 10A and 10B are diagrams showing modified examples of the protection member body 10. FIG. [Figure 8] 10A and 10B are diagrams showing modified examples of the tool 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Various features shown in the following embodiments can be combined with each other. Furthermore, each feature can be an invention independently.

[0010] 1. Description of the configuration of the embodiment 1.1. Tool kit composition As shown in FIG. 1, a tool set 100 of the embodiment includes a tool 1 and a protective member 8. In the embodiment, as an example, the protective member 8 includes a protective member main body 10 and an interposition member 20. The protective member 8 is attached to the tool 1. The protective member 8 is intended to protect the fingers that grip the grip portion 3 of the tool 1. How to use the protective member 8, including how to attach it, will be described later with reference to FIGS. 5A to 5C, etc.

[0011] 1.2.Tool configuration 2A to 2C show a tool 1 according to an embodiment. The tool 1 is also called a "chisel" in this technical field. In the embodiment, the tool 1 is a "perforator" used for processing (e.g., breaking) a workpiece such as a brick. The tool 1 has a cutting portion 2 and a gripping portion 3. The tool 1 is an impact-type tool. With the gripping portion 3 held, an impact force is applied to the tool 1 with, for example, a hammer HM (see FIG. 5B), thereby allowing the tip of the cutting portion 2 to process the workpiece.

[0012] The tool 1 of the embodiment has, for example, a substantially T-shape in plan view. The blade portion 2 extends linearly in the vertical direction of the paper in Fig. 2A. The grip portion 3 extends horizontally in Fig. 2A so as to be perpendicular to the blade portion 2.

[0013] More specifically, the gripping portion 3 includes a first gripping portion 3a and a second gripping portion 3b. As an example, the first gripping portion 3a has a tapered shape that gradually narrows in width when viewed from above in FIG. 2A. The first end of the first gripping portion 3a is located on the left side of the paper in FIG. 2A, has the widest width of the entire first gripping portion 3a, and is connected to the blade portion 2. The second end of the first gripping portion 3a is located on the right side of the paper in FIG. 2A, has the smallest width of the entire first gripping portion 3a, and is connected to the second gripping portion 3b. The second gripping portion 3b extends laterally in the paper in FIG. 2A while maintaining a generally uniform thickness. Note that this structure is merely an example, and any shape of blade portion 2 and gripping portion 3 can be used.

[0014] 2B , the angle θ between the first gripping portion 3a and the longitudinal direction of the tool 1 (the direction of the central axis CL) is, for example, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, or 50 degrees, or may be within a range of any two of the values ​​listed here. The angle between the cutting portion 2 and the longitudinal direction of the tool 1 and the angle between the second gripping portion 3b and the longitudinal direction of the tool 1 may also be the same as any one of the values ​​listed here, or may be within a range of any two of the values ​​listed here.

[0015] 1.3.Configuration of protective components 1.3.1. Structure of the protective member body The protective member body 10 will be described with reference to Figures 3A to 3C. The protective member body 10 of the embodiment has, as an example, a ring-shaped shape in a plan view. More specifically, the protective member body 10 has an insertion portion 11, a flange portion 12, and an engagement portion 13. The insertion portion 11 is formed so that the second grip portion 3b of the grip portion 3 of the tool 1 can be inserted therein. The insertion portion 11 of the embodiment is, as an example, a circular opening. The flange portion 12 is provided so as to surround the insertion portion 11.

[0016] In the embodiment, as an example, the engagement portion 13 is configured as a stepped portion. The stepped portion as the engagement portion 13 has a height h (see FIGS. 3B and 3C ) and is formed on the protection member main body 10, and is provided on one surface of the protection member main body 10, for example. As illustrated in the cross-sectional view of FIG. 3C , as an example, the stepped portion as the engagement portion 13 has a base surface 13a and wall surfaces 13b and 13c. The base surface 13a is a surface that intersects with the wall surfaces 13b and 13c. The engagement portion 13 has a size (specifically, depth and diameter) that allows the interposition member 20 to be received within the stepped portion. The wall surfaces 13b and 13c are formed to surround the interposition member 20 when the interposition member 20 is attached to the stepped portion (i.e., the engagement portion 13).

[0017] As shown in Fig. 3A, for example, the wall surfaces 13b, 13c are formed in an annular shape extending in the circumferential direction of the center position Q. In the embodiment, for example, the wall surfaces 13b, 13c are configured with curved surfaces 13b and flat surfaces 13c. Specifically, two curved surfaces 13b and two flat surfaces 13c are arranged opposite each other with the center position Q of the insertion portion 11 in between. In the plan view of Fig. 3A, the curved surfaces 13b and the flat surfaces 13c are alternately arranged and integrally connected along the circumferential direction of the center position Q, forming an annular shape as a whole.

[0018] As shown in Fig. 3A, for example, the seating surface 13a is formed in a non-annular shape. Specifically, in the embodiment, for example, two seating surfaces 13a are arranged facing each other across the insertion portion 11, and each seating surface 13a has an arc shape in a plan view. Both ends of each seating surface 13a are tapered, and the width becomes zero at the center of the plane 13c. Therefore, no seating surface 13a is provided at the center of the plane 13c.

[0019] In the embodiment, as an example, the protection member body 10 is made of polycarbonate, which has optical transparency. The optical transparency has the advantage that it is easy to visually confirm the position of the workpiece against which the blade portion 2 is to be abutted. By using polycarbonate, it is possible to provide a protection member body 10 that is lightweight and rigid.

[0020] For example, the thickness D1 (see FIG. 3B, etc.) of the protection member body 10 may be 0.5 cm or more and 2.5 cm or less. Alternatively, D1 may be 1 to 2 cm, or D1 may be 1.25 to 1.75 cm. The thickness D1 may be 0.01, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75, 2.0, 2.25, or 2.5 cm, or may be within a range of any two of the values ​​listed here.

[0021] For example, the diameter Φ (see FIG. 3A) of the protection member body 10 may be 4 cm or more and 12 cm or less. Alternatively, Φ may be 5 to 11 cm, or 6 to 10 cm. The diameter Φ may be 4, 5, 6, 7, 8, 9, 10, 11, or 12 cm, or may be within the range of any two of the values ​​listed here.

[0022] Refer to the "first distance Ra1" and "second distance Ra2" in FIG. 3A. The first distance Ra1 is the distance from the central position Q of the insertion portion 11 to the curved surface 13b. The second distance Ra2 is the distance from the central position Q to the plane 13c. Note that the distance Rb in FIG. 3A is the radius of the insertion portion 11. In this case, in the embodiment, as an example, the plane 13c has a portion where "the value of the second distance Ra2 is smaller than the minimum value of the first distance Ra1". Specifically, in the embodiment, as an example, the curved surface 13b is an arc (an arc of a perfect circle with a constant radius) in a plan view, and since the first distance Ra1 is the radius of the arc, Ra1 is a constant value. Also, in the plan view of FIG. 3A, the plane 13c corresponds to "a chord of a virtual full circle obtained by virtually extending the curved surface 13b". Therefore, not only is Ra2 < Ra1 established at the shortest distance between the central position Q and the plane 13c, but the plane 13c is closer to the central position Q than the curved surface 13b over the entire area of the plane 13c.

[0023] 1.3.2. Structure of the intervening member The intervening member 20 will be described with reference to FIGS. 4A and 4B. As an example, the intervening member 20 is composed of an annular rubber member (a so-called O-ring) having a thickness D2. The intervening member 20 is attached to the engaging portion 13 (step portion) of the protective member main body 10. The thickness D2 can be arbitrarily set, but for example, it may be the same as the height h of the step of the engaging portion 13 (see FIGS. 3B and 3C).

[0024] 2. Explanation of the operation and effect of the embodiment Refer to FIGS. 5A and 5B. For the sake of convenience, in these figures, the protective member main body 10 and the intervening member 20 are shown in a cross-sectional view. As shown in FIG. 5A, the tool 1 and the protective member 8 are aligned so that the central axes CL of each component coincide, and the protective member 8 is inserted into the gripping portion 3 while the intervening member 20 fits into the step of the engaging portion 13. At this time, the intervening member 20 may be first passed through the gripping portion 3 for positioning and then the protective member main body 10 may be inserted through it, or the protective member main body 10 and the intervening member 20 may be inserted through the gripping portion 3 together.

[0025] FIG. 5B illustrates the state after attachment. In the embodiment, the engaging portion 13 engages with the gripping portion 3 via the intervening member 20. The intervening member 20, which is an annular rubber member, is sandwiched between the tool 1 (grip 3) and the protection member main body 10 (engaging portion 13), thereby preventing the protection member main body 10 from moving in the axial direction of the gripping portion 3. In this manner, in the embodiment, the protection member main body 10 indirectly engages with the gripping portion 3. Note that, as shown in FIG. 5C, the positions of the protection member main body 10 and the intervening member 20 may be deeper (positions toward the tip of the tool 1) than in the state shown in FIG. 5B, and their positions in the axial direction of the tool 1 are not particularly limited.

[0026] 5B, the first grip portion 3a may be held with the fingers, or the second grip portion 3b may be held with the fingers on the side of the blade portion 2 rather than the protective member 8. The blade portion 2 may be brought against an object, and the rear end portion of the grip portion 3 may be struck with a hammer HM, for example.

[0027] Please refer to Figures 6A and 6B. Figure 6A is a view of the tool 1 and protective member 8 in the state of Figure 5B, viewed from the rear end side of the grip portion 3. Figure 6B is a view of the protective member main body 10 rotated by an angle θ in the circumferential direction of the grip portion 3 (see direction W in Figure 6B). One of the features of the embodiment is that the protective member main body 10 is configured so that when the grip portion 3 is inserted into the insertion portion 11 and rotated in the circumferential direction of the grip portion 3 (direction W), the engagement with the grip portion 3 becomes stronger than before the rotation.

[0028] To explain one of the effects of strengthening the engagement, please refer to the configuration near the dashed circle P in FIG. 6B . In FIG. 6B , circumferential rotation in the direction W shifts the position of the flat surface 13c in the circumferential direction, creating a position where the gap between the wall surfaces 13b and 13c and the gripping portion 3 narrows, and the interposition member 20 is more tightly sandwiched at that position. This increases the frictional force of the interposition member 20, strengthening the engagement between the protection member main body 10 and the gripping portion 3. In other words, the engagement between the protection member main body 10 and the gripping portion 3 is strengthened, preventing the protection member main body 10 from moving axially relative to the gripping portion 3. Furthermore, rotation in the opposite direction weakens the engagement, allowing the protection member 8 to be easily removed. As described above, this embodiment is characterized by a configuration in which the engagement force can be changed depending on the rotation angle of the protection member main body 10 in the circumferential direction.

[0029] 3. Modifications, etc. 3.1. Modifications of the Protective Member 8 3.1.1. Modified examples of the insertion part In the protective member main body 10, the insertion portion 11 is not limited to a circular opening and may be a notch. Specifically, as shown in FIG. 7, the insertion portion 11 may include a slit 11a extending in the radial direction of the protective member main body 10. The presence of the slit 11a makes it easy to insert the protective member main body 10 into the grip portion 3 from the side. Note that, in the modified example of FIG. 7, a ring-shaped intervening member 20 may be used as in the embodiment, but is not limited to this. A C-shaped intervening member with a portion of a circle cut out may also be used in accordance with the configuration of FIG. 7.

[0030] 3.1.2.Material Variations The material of the protective member body 10 is not limited to light-transmitting polycarbonate. Any other resin may be used. Examples of the resin include PET (polyethylene terephthalate) resin, acrylic resin, and PVC (polyvinyl chloride) resin. It is preferable that these resins also have light transparency. Any elastic material may be used, such as rubber or elastomer. Any metal may be used. The material of the protective member body 10 preferably has sufficient rigidity to withstand impact from a hammer HM or the like. The material of the protective member body 10 may be lightweight so as not to increase the weight during handling, and may be lighter than the material of the tool 1, for example. If the protective member body 10 has light transparency, it may be colorless or colored. It may have increased transparency to improve visibility during work. It is not necessary for the protective member body 10 to have light transparency.

[0031] 3.1.3. Variations of engagement parts In the embodiments, "engagement" means that one member (protective member main body 10) and another member (tool 1) are indirectly or directly engaged with each other. By engaging, the two members are combined so that they can be handled as a single member. There are no limitations on the specific structure that realizes such engagement, and any structure of engaging portion can be adopted. The multiple engaged members are substantially integrated and can be handled as a single component. A user can handle the tool set 100 of FIG. 5B (i.e., the protective member main body 10 and tool 1 engaged via the intervening member 20) as a single member with one hand.

[0032] As another example, the protective member main body 10 may be configured to directly engage with the grip portion 3. In this case, the protective member main body 10 is directly integrated with the grip portion 3. As an example, the diameters of the insertion portion 11 and the second grip portion 3b may be determined so that they fit together. Preferably, at least a portion of the inner surface of the insertion portion 11 may be provided with a surface treatment or an uneven surface as an additional engagement portion, thereby increasing frictional force upon contact. The surface treatment of the insertion portion 11 increases the surface roughness of the inner peripheral surface of the insertion portion 11 compared to the flange portion 12, etc. The uneven surface of the insertion portion 11 may be provided with any shape of protrusions or recesses on at least a portion of the inner surface of the insertion portion 11. In this variation, an additional engagement portion is provided on the inner peripheral surface of the insertion portion 11. Therefore, the engagement portion 13 and the intervening member 20 may be omitted, but both the engagement portion 13 and the additional engagement portion may be employed.

[0033] Various configurations can be employed for the engaging portion of the embodiments, including those described above. At least one or more of the variations described below can be employed alone or in combination. First, as a first example of the engaging portion, as in the embodiment, pressing force and frictional force between multiple contacting members can be utilized. As a second example of the engaging portion, a clip or clamp may be employed, and engagement may be achieved by clamping the gripping portion 3 with a clip or tightening the gripping portion 3 with a clamp. As a third example of the engaging portion, engagement may be achieved by forming mating projections and recesses on the gripping portion 3 and the protection member main body 10, and these may be mated and engaged. As a fourth example of the engaging portion, a string or belt may be employed, and may be engaged by wrapping or tying it around the gripping portion 3. As a fifth example of the engaging portion, a magnet may be employed to engage using magnetic force, or an attraction member may be employed to engage using attraction force.

[0034] 3.2. Tool Modifications, etc. 3.2.1. Differences in surface roughness The surface of the gripping portion 3 can be divided into a surface of the first gripping portion 3a (hereinafter also referred to as the "first surface") and a surface of the second gripping portion 3b (hereinafter also referred to as the "second surface"). The first surface is located closer to the cutting portion 2 of the tool 1 than the second surface. The first surface and the second surface may have different surface roughnesses. The surface roughness of the second surface may be smaller than the surface roughness of the first surface, which has the advantage of facilitating attachment and detachment of the protective member 8 when it is attached to the second surface.

[0035] 3.2.2. Mounting shoulder As shown in Fig. 8, the gripping portion 3 may be formed with an attachment step 4. At least a portion of the protective member 8 is abutted against the attachment step 4. The attachment step 4 may be a step as shown in Fig. 8, or alternatively may be a protrusion. In the embodiment, the attachment step 4 is provided at the boundary between the first gripping portion 3a and the second gripping portion 3b, but this is not limiting, and the attachment step 4 may be provided at any position on the second gripping portion 3b, for example.

[0036] Here, we will describe an example in which the two above-mentioned variations (different surface roughness and mounting step) can be simultaneously achieved. In this variation, the tool 1 is rotated on a lathe or the like to cut or polish the second gripping portion 3b. By machining it deep enough, the mounting step 4 can be formed. Furthermore, by grinding the surface of the second gripping portion 3b, the surface roughness can be reduced as a secondary effect. The tool 1 produced by this manufacturing method has the advantage of being able to simultaneously provide the mounting step 4 and different surface roughness.

[0037] However, the two modifications described above (difference in surface roughness and mounting step) can be provided as independent technical ideas. As an example, the second surface may be thinly surface-processed (polished) to reduce the surface roughness. In this case, deep cutting may be avoided, and the mounting step 4 may not be formed. As a result, the surface roughness may be differentiated without providing the mounting step 4. As another example, when forming the tool 1 by casting, the shape of the mold may be the shape shown in plan view in FIG. 8. As a result, the mounting step 4 may be provided while the surface roughness of the first surface and the second surface is made equal.

[0038] 4. Notes Various embodiments are exemplified below, and the embodiments shown below can be combined with each other. [Appendix 1] A protective member attached to a striking tool having a blade portion and a grip portion, for protecting fingers gripping the grip portion, A protective member body is provided, The protection member main body has an insertion portion, a flange portion, and an engagement portion, the insertion portion is formed so that the grip portion of the tool can be inserted therein; The flange portion is provided to surround the insertion portion, The engagement portion is configured to engage with the grip portion of the tool.

[0039] [Appendix 2] 10. The protective member according to claim 1, Further provided with an intervening member, the engaging portion is configured by a stepped portion formed on the protection member main body, the interposition member is attached to the step portion, The protective member, wherein the engaging portion engages with the grip portion via the intervening member.

[0040] [Appendix 3] 1. A protective member according to claim 2, The protective member, wherein the intervening member is made of an annular rubber member.

[0041] [Appendix 4] A protective member according to Supplementary Note 2 or Supplementary Note 3, The step portion has a base surface and a wall surface, the base surface is a surface that intersects with the wall surface, The wall surface is formed to surround the interposition member when the interposition member is attached to the step portion.

[0042] [Appendix 5] 5. The protective member according to claim 4, The wall surface has a curved surface and a flat surface, When the distance from the center position of the insertion portion to the curved surface is defined as a first distance and the distance from the center position to the flat surface is defined as a second distance, The protective member has a portion on the plane where the value of the second distance is smaller than the minimum value of the first distance.

[0043] [Appendix 6] 5. The protective member according to claim 4, The wall surface is formed in an annular shape, The protection member, wherein the base surface is formed in a non-annular shape.

[0044] [Appendix 7] A protective member according to any one of Supplementary Note 1 to Supplementary Note 6, A protective member configured such that when the protective member main body is rotated in a circumferential direction of the gripping portion while the gripping portion is inserted into the insertion portion, the engagement with the gripping portion is strengthened.

[0045] [Appendix 8] A protective member according to any one of Supplementary Note 1 to Supplementary Note 7, The protective member, wherein the protective member body is made of a material that is light-transmitting.

[0046] [Appendix 9] A protective member according to any one of Supplementary Note 1 to Supplementary Note 8, The protective member, wherein the protective member body is made of polycarbonate.

[0047] [Appendix 10] A protective member according to any one of Supplementary Note 1 to Supplementary Note 9, A protective member, wherein the thickness of the protective member body is 2.5 cm or less.

[0048] [Appendix 11] A protective member according to any one of Supplementary Note 1 to Supplementary Note 10, The protective member, wherein the protective member main body has a ring shape in a plan view.

[0049] [Appendix 12] A protective member according to any one of Supplementary Note 1 to Supplementary Note 11, A protective member, wherein the protective member body has a diameter of 4 cm or more and 12 cm or less.

[0050] [Appendix 13] A tool set comprising the protective member according to any one of appendices 1 to 12 and the tool, the gripping portion of the tool has a first surface and a second surface; the first surface is located closer to the cutting edge of the tool than the second surface; the surface roughness of the second surface is smaller than the surface roughness of the first surface; The protective member is attached to the second surface.

[0051] [Appendix 14] 14. The tool set of claim 13, The grip portion is formed with an attachment step portion against which at least a portion of the protection member is abutted. [Explanation of symbols]

[0052] 1:Tools 2:Blade part 3: Grip part 3a: 1st grip part 3b: Second grip part 4: Mounting step 8: Protective material 10: Protective member body 11: Insertion part 11a: Slit 12: Flange part 13: Engagement part 13a: Base surface 13b: Wall (curved surface) 13c: Wall surface (plane) 20:Intervening member CL: Central axis D1: Thickness D2: Thickness HM: Hammer P: dashed circle Q: Center position Ra1: First distance Ra2: 2nd distance θ: angle

Claims

1. A protective member attached to a striking tool having a blade portion and a grip portion, for protecting fingers gripping the grip portion, A protective member body is provided, The protection member main body has an insertion portion, a flange portion, and an engagement portion, the insertion portion is formed so that the grip portion of the tool can be inserted therein; The flange portion is provided to surround the insertion portion, The engagement portion is configured to engage with the grip portion of the tool.

2. The protective member according to claim 1, Further provided with an intervening member, the engaging portion is configured by a stepped portion formed on the protection member main body, the interposition member is attached to the step portion, The protective member, wherein the engaging portion engages with the grip portion via the intervening member.

3. The protective member according to claim 2, The protective member, wherein the intervening member is made of an annular rubber member.

4. The protective member according to claim 2 or 3, The step portion has a base surface and a wall surface, the base surface is a surface that intersects with the wall surface, The wall surface is formed to surround the interposition member when the interposition member is attached to the step portion.

5. The protective member according to claim 4, The wall surface has a curved surface and a flat surface, When a distance from a center position of the insertion portion to the curved surface is defined as a first distance and a distance from the center position to the flat surface is defined as a second distance, The plane has a portion where the value of the second distance is smaller than the minimum value of the first distance.

6. The protective member according to claim 4, The wall surface is formed in an annular shape, The protection member, wherein the base surface is formed in a non-annular shape.

7. The protective member according to any one of claims 1 to 3, A protective member configured such that when the protective member main body is rotated in a circumferential direction of the gripping portion while the gripping portion is inserted into the insertion portion, the engagement with the gripping portion is strengthened.

8. The protective member according to any one of claims 1 to 3, The protective member, wherein the protective member body is made of a material that is light-transmitting.

9. The protective member according to any one of claims 1 to 3, The protective member, wherein the protective member body is made of polycarbonate.

10. The protective member according to any one of claims 1 to 3, A protective member, wherein the thickness of the protective member body is 2.5 cm or less.

11. The protective member according to any one of claims 1 to 3, The protective member, wherein the protective member main body has a ring shape in a plan view.

12. The protective member according to any one of claims 1 to 3, The protective member has a diameter of 4 cm or more and 12 cm or less.

13. A tool set comprising the protective member according to any one of claims 1 to 3 and the tool, the gripping portion of the tool has a first surface and a second surface; the first surface is provided at a position closer to the cutting edge of the tool than the second surface, the surface roughness of the second surface is smaller than the surface roughness of the first surface; The protective member is attached to the second surface.

14. 14. The tool set of claim 13, The grip portion is formed with an attachment step portion against which at least a portion of the protection member is abutted.

Citation Information

Patent Citations

  • Hand tool and its manufacturing method

    JP2007098532A