Attachment for cutlery, cutlery assembly, and cutlery

Abstract

To make it possible to easily suppress increase in an insertion depth into an object when unpacking or opening.SOLUTION: An attachment 50 is used when a scissors 10 comprising a long first blade body 20 having a cutting tip 21 and a cutting edge 22 extending from the cutting tip 21 and a first grip part 29 is used as a cutter for unpacking or opening an object, and is attached to the first blade body 20, thereby regulating an insertion depth of the first blade body 20 into the object. The attachment 50 comprises an installation part 51 installed to the first blade body 20, and a regulation part 70 which is brought into contact with the object, thereby regulating the insertion depth. The regulation part 70 has a guide face 73 which so extends as to be inclined with respect to a longer direction of the first blade body 20, and is brought into contact with the object, thereby guiding slide movement of the first blade body 20 with respect to the object.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a blade attachment, a blade set, and a blade. [Background technology]

[0002] BACKGROUND ART Scissors having a first blade and a second blade connected to the first blade so as to be rotatable relative to the first blade are well known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-23805 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, one blade of the scissors is sometimes used as a cutter to open or unwrap an object such as a cardboard box. In this case, there is a risk that the blade will be inserted too deeply into the object, causing damage to the package.

[0005] This problem is not limited to scissors, but can also occur in other cutting tools with a single blade, such as knives. [Means for solving the problem]

[0006] Various aspects of a blade attachment, a blade assembly, and a blade for solving the above problems will be described. [Aspect 1] A blade attachment is used when a blade having a long blade body with a cutting point and a blade edge extending from the cutting point and a handle is used as a cutter for opening or unpacking an object, and the blade attachment is attached to the blade body to regulate the depth at which the blade body can be inserted into the object, a mounting portion attached to the blade body; a restricting portion that restricts the insertion depth by contacting the object, The restricting portion has a guide surface that extends at an angle with respect to the longitudinal direction of the blade body and that abuts against the object to guide the sliding movement of the blade body relative to the object. Blade attachment.

[0007] According to this configuration, when the cutting edge of the blade equipped with the attachment is inserted into an object, the guide surface of the restricting portion abuts against the object, restricting the depth of insertion of the blade into the object. Then, when the blade is slid while the guide surface of the restricting portion abuts against the object, the sliding movement of the blade is guided while restricting the insertion depth. Therefore, it is easy to prevent the blade from being inserted too deeply into the object when opening or unpacking the product.

[0008] [Aspect 2] the attachment portion is sheath-shaped and accommodates a portion of the blade body that is closer to the base end than the distal end portion including the cutting point, The restricting portion is provided at the tip end of the attachment portion. 2. The blade attachment according to claim 1.

[0009] According to this configuration, the blade can be easily attached to the attachment part by inserting the blade into the sheath-shaped attachment part. [Aspect 3] The restricting portion is attached to the tip end portion of the mounting portion and is configured to be rotatable between a use position in which the tip end portion of the blade body is exposed and the guide surface extends at an angle with respect to the longitudinal direction of the blade body, and a covering position in which the tip end portion is covered. A blade attachment according to aspect 2.

[0010] According to this configuration, when the blade is not being used as a cutter, the restricting portion is in the covering position, thereby preventing the tip of the blade from being exposed. [Aspect 4] the restricting portion has two side portions sandwiching the tip end of the attachment portion in the thickness direction of the blade body, and a connecting portion connecting the tip ends of the side portions to each other, A guide space that opens to the base end side of the side portion is formed between the side portions. A blade attachment according to any one of aspects 1 to 3.

[0011] With this configuration, when cutting tape attached to the corner of a cardboard box, for example, the two side portions located on both sides of the guide space of the restricting portion easily fit along the corner. As a result, the sliding movement of the blade along the extension direction of the corner is guided by the two side portions. This makes it easy to cut the tape at the corner.

[0012] [Aspect 5] The attachment according to any one of aspects 1 to 4; a blade having the blade body.

[0013] According to this configuration, it is possible to achieve the same effects as those of the blade attachments described in the first to fourth aspects. [Aspect 6] When the blade body is a first blade body, the blade is a pair of scissors including a second blade body rotatably connected to the first blade body, When the first blade body and the second blade body are closed, the cutting edge of the first blade body protrudes further than the cutting edge of the second blade body in the longitudinal direction. A blade set according to aspect 5.

[0014] With this configuration, the tip of the first blade of the scissors that protrudes further than the second blade can be used as a cutter when the scissors are closed. In this case, the attachment can easily prevent the blade from being inserted into an object when opening or unpacking.

[0015] [Aspect 7] A guard member is provided at the tip of the blade body to cover the ridge of the blade body and to restrict the insertion depth by coming into contact with the object. A blade set according to aspect 5 or 6.

[0016] If the guide surface of the restricting portion moves away from the object, the blade may be inserted too deeply into the object. In this regard, with the above configuration, the guide surface of the restricting portion is prevented from moving away from the object by the guard member abutting against the object, which prevents the blade from being inserted too deeply into the object. Therefore, it is possible to easily and reliably prevent the blade from being inserted too deeply into the object when unpacking or opening the object.

[0017] [Aspect 8] A blade having a long blade body with a cutting point and a cutting edge extending from the cutting point, and a handle, which is used as a cutter for opening or unpacking an object, A guard member is provided at the tip of the blade body, including the cutting edge, to cover the ridge of the blade body and to restrict the insertion depth of the blade body into the object by coming into contact with the object. Blade.

[0018] With this configuration, when the cutting edge of the blade is inserted into an object, the guard member comes into contact with the object, restricting the depth of insertion of the blade into the object. Therefore, it is easy to prevent the blade from being inserted too deeply into the object when opening or unpacking the package.

[0019] [Aspect 9] When the blade body is a first blade body, the blade is a pair of scissors including the first blade body and a second blade body rotatably connected to the first blade body, When the first blade body and the second blade body are closed, the cutting edge of the first blade body protrudes further than the cutting edge of the second blade body in the longitudinal direction of the first blade body. A blade according to embodiment 8.

[0020] According to this configuration, since the guard member is provided, when the tip portion of the first blade of the scissors in the closed state that protrudes further than the second blade is used as a cutter, it is easy to prevent the depth of insertion into the target object from becoming too great when unpacking or opening the package. [Effects of the Invention]

[0021] According to the present invention, it is possible to easily prevent the insertion depth into the object from becoming too large when opening or unpacking the package. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is an exploded perspective view showing scissors and an attachment that constitute a scissors set according to a first embodiment, separated from each other. [Figure 2] FIG. 2 is a perspective view of the scissors set according to the first embodiment. [Figure 3] FIG. 3 is a perspective view of the scissors set according to the first embodiment. [Figure 4] FIG. 4 is an exploded perspective view of the attachment according to the first embodiment. [Figure 5] FIG. 5 is an exploded perspective view of the attachment according to the first embodiment. [Figure 6] FIG. 6 is a plan view of the scissors set according to the first embodiment, showing the restricting portion in the use position. [Figure 7] FIG. 7 is a cross-sectional view of the attachment according to the first embodiment. [Figure 8] FIG. 8 is a diagram illustrating how to use the scissors set according to the first embodiment. [Figure 9] FIG. 9 is a perspective view illustrating how to use the scissors set according to the first embodiment. [Figure 10] FIG. 10 is a diagram illustrating how to use the scissors that make up the scissors set according to the first embodiment. [Figure 11]FIG. 11 is an exploded plan view showing the knives and the attachment that constitute the blade set according to the second modified example, separated from each other. [Figure 12] FIG. 12 is a plan view of a tool set according to a second modification. [Figure 13] FIG. 13 is a plan view of a blade set according to a second modified example, showing a state in which the restricting portion is in the use position. [Figure 14] FIG. 14(a) is a plan view of the scissors assembly according to the second embodiment, showing the state in which the inner cover is in the covering position, and FIG. 14(b) is a side view of the attachment. [Figure 15] FIG. 15 is a plan view of the scissors set according to the second embodiment, showing the inner cover in the use position. [Figure 16] Figure 16(a) is a plan view of the scissors assembly according to the third embodiment, showing the attachment in the covering position, and Figure 16(b) is an end view of the attachment in Figure 16(a) seen from the tip side. [Figure 17] Figure 17(a) is a plan view of the scissors assembly according to the third embodiment, showing the attachment rotated 90 degrees from the covering position, and Figure 17(b) is an end view of the attachment in Figure 17(a) seen from the tip side. [Figure 18] FIG. 18 is a plan view of the scissors set according to the third embodiment, showing the attachment in the use position. [Figure 19] FIG. 19 is a plan view of scissors according to a fourth embodiment, showing a state in which the attachment is in the use position. [Figure 20] FIG. 20 is a plan view of scissors according to a fourth embodiment, showing a state in which the attachment is in the covering position. [Figure 21] FIG. 21(a) is a plan view of the scissors assembly according to the fifth embodiment, showing the attachment in the covering position, and FIG. 21(b) is a side view of the attachment in FIG. 21(a). [Figure 22]FIG. 22 is a plan view of the scissors set according to the fifth embodiment, showing the attachment in the use position. [Figure 23] FIG. 23 is a plan view of the scissors assembly according to the fifth embodiment, showing a state in which an attachment is being removed. [Figure 24] FIG. 24(a) is a plan view of the scissors assembly according to the sixth embodiment, showing the attachment in the covering position, and FIG. 24(b) is a plan view of the attachment in FIG. 24(a). [Figure 25] FIG. 25 is a plan view of the scissors set according to the sixth embodiment, showing the attachment in the first use position. [Figure 26] FIG. 26 is a plan view of the scissors set according to the sixth embodiment, showing the attachment in the second use position. [Figure 27] FIG. 27 is a plan view of the scissors set according to the sixth embodiment, showing the attachment in the second use position and the first blade body and the second blade body in an open state. DETAILED DESCRIPTION OF THE INVENTION

[0023] First Embodiment Hereinafter, a first embodiment in which a blade set, blades, and blade attachment are embodied as a scissors set, scissors, and scissors attachment will be described with reference to Figs.

[0024] As shown in FIG. 1, the scissors set includes scissors 10 and an attachment 50. First, the scissors 10 will be described. <Scissors 10> 1, the scissors include a long first blade body 20 and a long second blade body 30 rotatably connected to the first blade body 20. The first blade body 20 and the second blade body 30 are connected to each other via a connecting shaft 11 provided at the center of the first blade body 20 and the second blade body 30 in the longitudinal direction so as to be rotatable relative to each other.

[0025] In the following description, the longitudinal direction, width direction, and thickness direction of the first blade body 20 will be simply referred to as the longitudinal direction, width direction, and thickness direction. The first blade body 20 has a cutting edge 21 and a cutting edge 22 extending from the cutting edge 21. The first blade body 20 also has a ridge 23 located on the opposite side to the cutting edge 22 in the width direction.

[0026] The second blade body 30 has a cutting edge 31 and a cutting edge (not shown) extending from the cutting edge 31. The second blade body 30 also has a ridge 33 located on the opposite side to the cutting edge. A first handle 29 and a second handle 39 are attached to the base end of the first blade body 20 and the base end of the second blade body 30, respectively.

[0027] When the first blade body 20 and the second blade body 30 are closed, the cutting edge 21 of the first blade body 20 protrudes further than the cutting edge 31 of the second blade body 30 in the longitudinal direction. The first blade body 20 has a stepped blade 25. The stepped blade 25 is provided on a portion of the cutting edge 22 that protrudes further than the second blade body 30. The cutting edge 22 of the stepped blade 25 is recessed relative to the cutting edge 22 in the portion closer to the base end than the stepped blade 25, forming a step.

[0028] <Guard member 40> As shown in Figure 1, the tip portion 24 of the first blade body 20, including the cutting edge 21, is provided with a guard member 40 that covers the ridge 23 of the first blade body 20 and abuts against the object C to regulate the depth of insertion of the first blade body 20 into the object C.

[0029] The guard member 40 covers both side surfaces of the first blade body 20 as well as the ridge 23. The guard member 40 is made of synthetic resin. The guard member 40 is formed integrally with the first blade body 20 by insert molding. The guard member 40 fills the interior of a hole or notch (both not shown) that penetrates the first blade body 20 in the thickness direction. This prevents the guard member 40 from falling off the first blade body 20.

[0030] <Attachment 50> As shown in FIGS. 1 to 3, the attachment 50 is used when the scissors 10 are used as a cutter for opening or unpacking an object C such as a cardboard box.

[0031] The attachment 50 includes a mounting part 51 that is mounted to the first blade body 20 and the second blade body 30, and a restricting part 70 that restricts the depth of insertion of the first blade body 20 into the object C by coming into contact with the object C. The restricting part 70 is provided at the tip of the mounting part 51.

[0032] (Mounting part 51) As shown in FIGS. 4 and 5, the attachment portion 51 is sheath-shaped and accommodates the second blade body 30 and a portion of the first blade body 20 that is closer to the base end than the tip portion 24 including the cutting edge 21.

[0033] The mounting portion 51 has a bottom wall 52 extending in the longitudinal direction, a top wall 53 extending in the longitudinal direction and facing the bottom wall 52, and two side walls 54 extending in the longitudinal direction and facing each other in the thickness direction. The two side walls 54 connect the widthwise ends of the bottom wall 52 and the top wall 53 to each other.

[0034] The bottom wall 52 faces the ridge 23 of the first blade body 20. The top wall 53 faces the cutting edge 22 of the first blade body 20. The side wall 54 faces the side surface of the first blade body 20. The base end of each side wall 54 is provided with a base end recess 55 that opens to the base end side and allows the connecting shaft 11 of the scissors 10 to escape.

[0035] A tip recess 56 is provided at the tip of each side wall 54. The tip recess 56 opens toward the tip side and allows the guard member 40 of the scissors 10 to escape. The tip recess 56 is provided in a portion of the side wall 54 adjacent to the bottom wall 52.

[0036] The outer surface of the tip portion 57 of the mounting portion 51, more specifically, the outer surfaces of the tip portions 57 of the top wall 53 and the two side walls 54, are located more inward than the outer surfaces of the portions closer to the base end than the tip portion 57. The tip portion 57 of the top wall 53 is curved so that it is positioned closer to the bottom wall 52 in the width direction as it approaches the tip. Furthermore, the bottom wall 52 is not provided at the tip portion 57.

[0037] A pair of support shafts 58 protrude from the outer surface of the tip end 57 of each side wall 54. The support shafts 58 have axes extending along the thickness direction. A pair of first engagement protrusions 59 are provided on the outer surface of the tip portion 57 of each side wall 54 in a portion closer to the tip side than the support shaft portion 58. The first engagement protrusions 59 have an axis that extends along the thickness direction.

[0038] A second engagement protrusion 60 is provided on the tip end 57 of the top wall 53. The second engagement protrusion 60 extends along the thickness direction. (Regulatory section 70) 4 and 5, the restricting portion 70 has two side portions 71 that sandwich the tip portion 57 of the mounting portion 51 in the thickness direction, and a connecting portion 72 that connects the tip portions of the side portions 71. A guide space 74 that opens to the base end sides of the side portions 71 is formed between the side portions 71.

[0039] A support hole 78 is provided at the base end of each side portion 71. The support hole 78 is rotatably supported by the support shaft portion 58 of the mounting portion 51. The support hole 78 penetrates the side portion 71 in the thickness direction. The restricting portion 70 is configured to be rotatable between a use position shown in FIG. 6 and a covering position shown in FIGS.

[0040] As shown in Fig. 6, the restricting portion 70 has a guide surface 73 that extends at an angle relative to the longitudinal direction when in the use position and that abuts against the object C to guide the sliding movement of the first blade body 20 relative to the object C. When in the use position, the restricting portion 70 exposes the tip portion 24 of the first blade body 20. The guide surface 73 also extends at an angle relative to the longitudinal direction. The guide surface 73 is provided on each side portion 71 (see Fig. 5).

[0041] 2 and 3, in the covering position, the restricting portion 70 covers the tip portion 24. When the restricting portion 70 is in the covering position, the restricting portion 70 is adjacent to the guard member 40 in the width direction and protrudes further toward the tip side than the guard member 40 in the longitudinal direction (see FIG. 2).

[0042] 4 and 5, each side portion 71 is provided with an engagement hole 79 that engages with the first engagement protrusion 59 of the mounting portion 51 when the restricting portion 70 is in the covering position. The engagement hole 79 penetrates the side portion 71 in the thickness direction.

[0043] 7, when the restricting part 70 is in the use position, the connecting part 72 engages with the second engaging protrusion 60 of the mounting part 51. Note that, when the connecting part 72 abuts against the outer surface of the top wall 53, the restricting part 70 is restricted from rotating from the use position in the direction opposite to the covering position.

[0044] An indicator 75 that indicates the rotation direction of the restricting part 70 from the covered position toward the use position is provided on the outer surface of the side part 71. In the present embodiment, the indicator 75 has the word "OPEN" recessed therein together with an arrow that indicates the rotation direction of the restricting part 70 from the covered position toward the use position.

[0045] The mounting portion 51 and the restricting portion 70 that constitute the attachment 50 of this embodiment are both made of synthetic resin. Next, the operation of this embodiment will be described.

[0046] As shown in FIG. 8 , the restricting part 70 of the attachment 50 is placed in the use position, thereby exposing the tip 24 of the first blade body 20. In this state, the cutting edge 21 of the first blade body 20 is inserted into the tape T attached to the object C, which is a cardboard box; more specifically, into the portion of the tape T that covers the boundary between the flaps of the cardboard box. At this time, the guide surface 73 of the restricting part 70 abuts against the object C, thereby restricting the depth of insertion of the first blade body 20 into the object C. Then, when the first blade body 20 is slid along the boundary while the guide surface 73 of the restricting part 70 is abutted against the object C, the sliding movement of the first blade body 20 is guided while the depth of insertion is restricted.

[0047] Next, the effects of this embodiment will be described. (1-1) The regulating portion 70 of the attachment 50 extends at an angle relative to the longitudinal direction of the first blade body 20 and has a guide surface 73 that abuts against the object C to guide the sliding movement of the first blade body 20 relative to the object C.

[0048] According to this configuration, the above-mentioned effects are achieved, and it is therefore possible to easily prevent the first blade 20 from being inserted too deeply into the object C when opening or unpacking the package. (1-2) By inserting the first blade body 20 into the sheath-shaped mounting portion 51, the mounting portion 51 can be easily mounted on the first blade body 20.

[0049] (1-3) The restricting portion 70 is attached to the distal end portion 57 of the mounting portion 51 and is configured to be rotatable between a use position and a covering position. According to this configuration, when the scissors 10 are not being used as a cutter, the restricting portion 70 is in the covering position, thereby preventing the tip portion 24 of the first blade body 20 from being exposed.

[0050] (1-4) Between the side portions 71 of the restricting portion 70, a guide space 74 is formed that opens to the base end side of the side portions 71. 9, when cutting tape T attached to a corner of an object C, the two side portions 71 located on both sides of the guide space 74 of the restricting part 70 easily fit along the corner. Therefore, the sliding movement of the first blade body 20 along the direction in which the corner extends is guided by the two side portions 71. This makes it possible to easily cut the tape T at the corner.

[0051] (1-5) When the first blade body 20 and the second blade body 30 are closed, the cutting edge 21 of the first blade body 20 protrudes further than the cutting edge 31 of the second blade body 30 in the longitudinal direction. With this configuration, the tip portion 24 of the first blade 20 of the scissors 10 in the closed state, which protrudes further than the second blade 30, can be used as a cutter. In this case, the attachment 50 can easily prevent the scissors 10 from being inserted into the object C when opening or unpacking the package.

[0052] (1-6) The tip portion 24 of the first blade body 20 is provided with a guard member 40 that covers the ridge 23 of the first blade body 20 and abuts against the object C to regulate the insertion depth. If the guide surface 73 of the restricting portion 70 moves away from the object C, the insertion depth of the first blade body 20 into the object C may become too large.

[0053] In this regard, with the above configuration, the guide surface 73 of the restricting portion 70 is prevented from moving away from the object C by the guard member 40 abutting against the object C, thereby preventing the first blade body 20 from being inserted too deeply into the object C. Therefore, it is possible to easily and reliably prevent the first blade body 20 from being inserted too deeply into the object C when unpacking or opening the package.

[0054] (1-7) The first blade body 20 of the scissors 10 without the attachment 50 attached can also be used as a cutter. In this case, when the cutting edge 21 of the first blade body 20 is inserted into the object C, the guard member 40 comes into contact with the object C, thereby restricting the depth to which the first blade body 20 is inserted into the object C. Therefore, it is easy to prevent the first blade body 20 from being inserted too deeply into the object C when unpacking or opening the package.

[0055] (1-8) As shown in Figure 10, the first blade body 20 of the scissors 10 without the attachment 50 attached can also be used as a cutter to open the shrink-wrapped P of the product G, which is the object C. In this case, with the cutting edge 22 of the first blade body 20 facing upward, the guard member 40 is pressed against the product G and the scissors 10 is slid, whereby the shrink-wrapped P can be opened without the cutting edge 22 coming into contact with the product G.

[0056] (1-9) The side portion 71 is provided with an engagement hole 79 that engages with the first engagement protrusion 59 of the attachment portion 51 when the restricting portion 70 is in the covering position. This prevents the restricting portion 70 from rotating toward the use position when in the covering position. This prevents the tip portion 24 of the first blade 20 from being exposed due to the restricting portion 70 rotating toward the use position against the user's intention.

[0057] (1-10) The connecting portion 72 of the restricting portion 70 is configured to engage with the second engaging protrusion 60 of the mounting portion 51 when the restricting portion 70 is in the use position. This restricts the restricting portion 70 in the use position from rotating toward the covering position. This makes it possible to prevent the restricting portion 70 from rotating toward the covering position against the user's intention.

[0058] Second Embodiment Hereinafter, the scissors set according to the second embodiment will be described with reference to FIGS. As shown in FIGS. 14( a ) and 15 , the scissors set includes scissors 310 and an attachment 350 .

[0059] Scissors 310 of this embodiment have the same or corresponding configuration as the first embodiment, except that first blade body 320 does not have a stepped blade. Therefore, for configurations that are the same or corresponding to those of the first embodiment, the symbol "3**" is added, which is "300" to the symbol "**" of the first embodiment, and redundant explanations will be omitted.

[0060] The attachment 350 includes a sheath-shaped mounting portion 351 and an inner cover 380 . The mounting portion 351 has a bottom wall 352 facing the ridge 323 of the first blade body 320, a top wall 353 facing the ridge 333 of the second blade body 330, and two side walls 354, and is in the shape of a rectangular tube.

[0061] The distal end surface of the mounting portion 351 is open. The periphery of the opening on the distal end surface of the mounting portion 351 is inclined in the width direction so that the closer it is to the bottom wall 352, the closer it is to the distal end. When the mounting portion 351 is attached to the first blade body 320 and the second blade body 330 of the scissors 310, the distal end portion 324 including the cutting edge 321 of the first blade body 320 protrudes beyond the distal end surface of the mounting portion 351.

[0062] 14(b), a slit 361 extending in the longitudinal direction is provided in each side wall 354. A narrow portion 362 having a length in the thickness direction that is smaller than that of both end portions is provided in the central portion in the extending direction of the slit 361.

[0063] An inner cover 380 is housed inside the mounting portion 351. The inner cover 380 has a rectangular cylindrical shape that fits along the inner circumferential surface of the mounting portion 351, and is provided so as to be slidable relative to the mounting portion 351 in the longitudinal direction.

[0064] The inner cover 380 is open on both the distal end side and the proximal end side. A proximal end recess 381 that opens on the proximal end side and allows the connecting shaft 311 of the scissors 310 to escape is provided in a portion of the inner cover 380 that faces each side wall 354 of the attachment portion 351.

[0065] The attachment 350 is provided with a pair of operating parts 382. The operating parts 382 have connecting parts 383 that are inserted from the outside into the respective slits 361 of the mounting part 351 and that are connected to the inner cover 380. The connecting parts 383 are fitted into holes (not shown) that pass through the inner cover 380.

[0066] 14(a), in the covering position where the operating part 382 is located at the tip of the slit 361, the tip of the inner cover 380 protrudes further toward the tip side than the tip surface of the attachment part 351. At this time, the inner cover 380 covers the entire tip portion 324 of the first blade 320 from both sides in the thickness direction.

[0067] 15 , in the use position where the operating part 382 is located at the base end of the slit 361, the entire inner cover 380 is housed inside the mounting part 351. At this time, the tip part 324 of the first blade 320 is exposed to the outside of the attachment 350.

[0068] The tip surface of the mounting portion 351 of the attachment 350 functions as a guide surface 373 of the restricting portion 370 . In such a scissors set, by placing the inner cover 380 in the use position, the first blade 320 of the scissors 310 can be used as a cutter for opening or unpacking the object C.

[0069] The scissors set of this embodiment can achieve the same effects as the effects (1-1), (1-2), and (1-5) of the first embodiment. Furthermore, the scissors 310 of this embodiment can achieve the same effects as the effects (1-7) and (1-8) of the first embodiment.

[0070] Furthermore, the scissors set of this embodiment can provide the following new effects. (2-1) The narrow portion 362 is provided in the slit 361, making it difficult for the connecting portion 383 of the operating portion 382 to pass through the narrow portion 362. This restricts movement of the operating portion 382 between the use position and the covering position. This makes it possible to prevent the inner cover 380 from moving against the user's intention.

[0071] <Third embodiment> Hereinafter, the scissors set according to the third embodiment will be described with reference to FIGS. As shown in FIGS. 16( a ), 17 ( a ), and 18 , the scissors set includes scissors 410 and an attachment 450 .

[0072] Scissors 410 of this embodiment have the same or corresponding configuration as the first embodiment, except that first blade body 420 does not have a stepped blade. Therefore, for configurations that are the same or corresponding to those of the first embodiment, the symbol "4**" is added, which is the symbol "**" of the first embodiment plus "400", and redundant explanations will be omitted.

[0073] As shown in Figures 16(a), 16(b), 17(a) and 17(b), the attachment 450 is sheath-shaped. The attachment 450 has a main body portion 460 and an inner cylindrical portion 462 provided inside the main body portion 460 .

[0074] The main body portion 460 has a square cylindrical shape and includes a bottom wall 452, a top wall 453, two side walls 454, and a tip wall 461. The tip wall 461 is continuous with the tips of the bottom wall 452 and the two side walls 454, and closes the half of the main body portion 460 on the bottom wall 452 side.

[0075] The portion of the tip surface of the main body portion 460 other than the tip wall 461 is open toward the tip side. The periphery of the opening in the tip surface of the main body portion 460 is inclined so that the closer it is to the tip wall 461 in the width direction, the closer it is to the tip side. The periphery of the opening in the tip surface of the main body portion 460 functions as a guide surface 473 of the restriction portion 470.

[0076] The inner cylinder portion 462 is cylindrical and fixed to the inner surface of the main body portion 460. The inner diameter of the inner cylinder portion 462 is set to be the same as or slightly larger than the width direction length of the base ends of the first blade body 420 and the second blade body 430 when the first blade body 420 and the second blade body 430 are closed.

[0077] The attachment 450 is configured to be rotatable relative to the scissors 410 about an axis extending in the longitudinal direction, in a state in which the first blade 420 and the second blade 430 of the scissors 410 are housed therein.

[0078] 16(a), in the covering position where the inner cylinder portion 462 is separated from the handle portions 429, 439 and the two side walls 454 face each other in the width direction (the vertical direction in FIG. 16(a)), the cutting edge 422 of the first blade body 420 faces the inner surface of one of the side walls 454. At this time, the entire cutting edge 422 of the first blade body 420 is covered by the side wall 454.

[0079] FIG. 17(a) shows the attachment 450 in the covering position rotated 90 degrees around an axis extending in the longitudinal direction. FIG. 18 shows a state in which the attachment 450 has been slid from the state shown in FIG. 17(a) to a use position in which it is close to the handles 429, 439.

[0080] As shown in FIG. 18, in the use position, the inner surface of the tip wall 461 of the attachment 450 abuts against the guard member 440 provided on the first blade body 420, and the tip portion 424 of the first blade body 420 is exposed to the outside of the attachment 450.

[0081] In such a scissors set, by placing the attachment 450 in the use position, the first blade 420 of the scissors 410 can be used as a cutter to open or unpack the object C.

[0082] The scissors set of this embodiment can achieve the same effects as the effects (1-1), (1-2), and (1-5) of the first embodiment. Furthermore, the scissors 410 of this embodiment can achieve the same effects as the effects (1-7) and (1-8) of the first embodiment.

[0083] <Fourth embodiment> Hereinafter, a scissors set according to a fourth embodiment will be described with reference to FIGS. As shown in FIGS. 19 and 20, the scissors set includes scissors 510 and an attachment 550.

[0084] Scissors 510 of this embodiment have the same or corresponding configuration as the first embodiment, except that first blade body 520 does not have a stepped blade and second blade body 530 has an elongated hole 534. Therefore, for configurations that are the same as or correspond to those of the first embodiment, the symbol "5**" is added by adding "500" to the symbol "**" of the first embodiment, and redundant explanations will be omitted.

[0085] A long hole 534 extending along the longitudinal direction of the second blade body 530 is provided in a portion of the second blade body 530 closer to the tip side than the connecting shaft portion 511. The long hole 534 penetrates the second blade body 530 in the thickness direction.

[0086] An attachment 550 is attached to the second blade body 530 so as to be slidable in the longitudinal direction. The attachment 550 has a top wall 553 covering the ridge 533 of the second blade body 530, two side walls 554 covering both side surfaces of the second blade body 530 and both side surfaces of the first blade body 520, and two insertion pins 592 connecting the side walls 554 and inserted into the elongated holes 534. The attachment 550 is open on both sides in the longitudinal direction and on the side opposite the top wall 553 in the width direction. The attachment 550 is made of synthetic resin. The two insertion pins 592 are spaced apart from each other in the longitudinal direction.

[0087] As shown in FIG. 19, when the insertion pin 592 is in the use position located at the base end side in the elongated hole 534 , the tip portion 524 of the first blade body 520 is exposed to the outside of the attachment 550 .

[0088] As shown in FIG. 20, when the insertion pin 592 is in the covering position located at the most distal end side in the elongated hole 534 , the entire distal end portion 524 of the first blade 520 is covered by the attachment 550 .

[0089] In such a scissors set, by placing the attachment 550 in the use position, the first blade 520 of the scissors 510 can be used as a cutter for opening or unpacking the object C.

[0090] The tip end surface of attachment 550 is inclined in the width direction so as to be positioned closer to the tip end as it moves away from top wall 553. The opening periphery of the tip end surface of attachment 550 functions as a guide surface 573 of restriction portion 570.

[0091] The scissors set of this embodiment can achieve the same effects as the effects (1-1) and (1-5) of the first embodiment. Furthermore, the scissors set of this embodiment can provide the following new effects.

[0092] (4-1) By placing the attachment 550 in the covering position, the entire tip portion 524 of the first blade 520 can be covered. Fifth Embodiment Hereinafter, the scissors set according to the fifth embodiment will be described with reference to FIGS.

[0093] As shown in FIGS. 21( a ), 22 , and 23 , the scissors set includes scissors 610 and an attachment 650 . The scissors 610 of this embodiment have the same or corresponding configuration as the first embodiment. Therefore, for the same or corresponding configuration as the first embodiment, the symbol "6**" is added by adding "600" to the symbol "**" of the first embodiment, and redundant explanations will be omitted.

[0094] The attachment 650 has a top wall 653 that covers the cutting edge 622 of the first blade body 620, and two side walls 654 that cover the side surfaces of the first blade body 620 and the second blade body 630 (see FIG. 21(b)). The attachment 650 is open on both sides in the longitudinal direction and on the side opposite the top wall 653 in the width direction.

[0095] At the base end of each side wall 654, a base-end recess 655 is provided which opens to the base end side and allows the connecting shaft 611 of the scissors 610 to escape. The base-end recess 655 has a first engagement portion 657 and a second engagement portion 658 continuing to the base-end side of the first engagement portion 657. The first engagement portion 657 is arc-shaped and opens on the base-end side. The second engagement portions 658 are arc-shaped and are provided on both sides in the width direction.

[0096] At the tip of each side wall 654, a tip-side recess 656 is provided that opens to the tip side and allows the guard member 640 of the scissors 610 to escape. A finger hook 659 protrudes from the outer surface of one of the side walls 654. The finger hook 659 is provided on the edge of the side wall 654 on the opposite side in the width direction from the top wall 653. The finger hook 659 extends along the edge.

[0097] A restricting protrusion 660 is provided on the inner surface of one side wall 654 to restrict the attachment 650 from being displaced in the width direction relative to the scissors 610 by coming into contact with the ridge 623 of the first blade body 620 .

[0098] As shown in Figure 21, in the covering position where the second engagement portion 658 of the base end recess 655 is engaged with the connecting shaft portion 611, the entire cutting edge 622 of the first blade body 620 is covered from the sides by both side walls 654 of the attachment 650.

[0099] As shown in FIG. 22, in the use position where the first engagement portion 657 of the base-end recess 655 is engaged with the connecting shaft portion 611, the tip portion 624 of the first blade 620 is exposed to the outside of the attachment 650.

[0100] The portion of the tip surface of attachment 650 on the top wall 653 side is inclined in the width direction so that the further away from top wall 653 it is, the closer it is to the tip side. The opening periphery of the tip surface of attachment 650 functions as a guide surface 673 of restriction portion 670.

[0101] The attachment 650 is made of a soft resin material. In such a scissors set, by placing the attachment 650 in the use position, the first blade 620 of the scissors 610 can be used as a cutter to open or unpack the object C.

[0102] The scissors set of this embodiment can achieve the same effects as the effects (1-1), (1-2), and (1-5) of the first embodiment. Furthermore, the scissors 610 of this embodiment can achieve the same effects as the effects (1-7) and (1-8) of the first embodiment.

[0103] Furthermore, the scissors set of this embodiment can provide the following new effects. (5-1) Restriction protrusions 660 provided on the inner surfaces of side walls 654 restrict displacement of attachment 650 in the width direction relative to scissors 610. This prevents attachment 650 from falling off scissors 610 against the user's intention.

[0104] (5-2) As shown in Figure 23, a user holds the scissors assembly with one hand with attachment 650 in the covering position, and places the thumb of that hand on finger rest 659 and presses it toward top wall 653. This causes attachment 650 to bend and deform, causing restriction protrusion 660 to climb over first blade 620 and rotate around connecting shaft 611, thereby removing attachment 650 from scissors 610. Therefore, attachment 650 can be easily removed from scissors 610 with one hand.

[0105] Sixth Embodiment Hereinafter, the scissors set according to the sixth embodiment will be described with reference to FIGS. As shown in FIG. 24( a ) and FIGS. 25 to 27 , the scissors set includes scissors 710 and an attachment 750 .

[0106] The scissors set of this embodiment has the same or corresponding configuration as the sixth embodiment. Therefore, for the same or corresponding configuration as the sixth embodiment, the reference numeral "7**" is added, which is the reference numeral "6**" of the sixth embodiment plus "100", and redundant explanations will be omitted.

[0107] The following description will focus on the differences from the fifth embodiment. As shown in Figures 24(a) and 24(b), the attachment 750 has a bottom wall 752 that covers the ridge 723 of the first blade body 720, and two side walls 754. The attachment 750 does not have a configuration corresponding to the top wall 653 of the fifth embodiment. The attachment 750 is open on both sides in the longitudinal direction, and is also open on the side opposite the bottom wall 752 in the width direction (the upper side in Figures 24(a) and 24(b)).

[0108] Each side wall 754 has a proximal recess 755 and a distal recess 756. The proximal recess 755 has a first engagement portion 757 and a second engagement portion 758. Although not shown, a restricting protrusion is provided on the inner surface of one side wall 754, which abuts against the ridge 733 of the second blade 730 to restrict displacement of the attachment 750 relative to the scissors 710 in the width direction.

[0109] 24(b), a guide groove 759 extending along the longitudinal direction is provided on the inner surface of each side wall 754. The guide groove 759 allows the connecting shaft 711 of the scissors 710 to escape, and opens into the first engagement portion 757 of the base-end recess 755. Note that the guide groove 759 does not open into the tip end of the side wall 754.

[0110] As shown in Figure 24(a), in the covering position where the second engagement portion 758 of the base end recess 755 is engaged with the connecting shaft portion 711, the entire cutting edge 722 of the first blade body 720 is covered from the sides by both side walls 754 of the attachment 750.

[0111] As shown in FIG. 25, in the first use position where the first engagement portion 757 of the base-end recess 755 is engaged with the connecting shaft portion 711, the tip portion 724 of the first blade 720 is exposed to the outside of the attachment 750.

[0112] The portion of the tip surface of attachment 750 opposite bottom wall 752 is inclined in the width direction so that the closer it is to bottom wall 752, the closer it is to the tip side. The periphery of the opening in the tip surface of attachment 750 functions as a guide surface 773 of restriction portion 770.

[0113] The attachment 750 is made of a soft resin material. In such a scissors set, by placing the attachment 750 in the first use position, the first blade 720 of the scissors 710 can be used as a cutter to open or unpack the object C.

[0114] The scissors set of this embodiment can achieve the same effects as the effects (1-1), (1-2), and (1-5) of the first embodiment. Furthermore, the scissors 710 of this embodiment can achieve the same effects as the effects (1-7) and (1-8) of the first embodiment.

[0115] Furthermore, the scissors set of this embodiment can provide the following new effects. (6-1) A user pulls attachment 750, which is in the first use position shown in FIG. 25, toward second handle 739. As a result, as shown in FIG. 26, attachment 750 moves relatively within guide groove 759 to the second use position where connecting shaft 711 abuts against the tip of guide groove 759, accompanied by flexural deformation. As a result, bottom wall 752 of attachment 750 moves closer to second handle 739 than connecting shaft 711, so that second blade body 730 can be rotated relative to first blade body 720 around connecting shaft 711, as shown in FIG. 27. In other words, scissors 710 can be used as scissors with attachment 750 still attached.

[0116] <Example of change> The above-described embodiments can be modified as follows: The above-described embodiments and the following modifications can be combined with each other within the scope of technical compatibility.

[0117] The guard members 40, 240, 340, 440, 540, 640, and 740 may be omitted. If the scissors assembly includes the attachments 50, 250, 350, 450, 550, 650, and 750, the above-described effect (1-1) can be achieved.

[0118] In the first embodiment, the restricting portion 70 may be fixed to the mounting portion 51 in the use position. In other words, the restricting portion 70 may not be able to rotate to the covering position.

[0119] In the first embodiment, the display unit 75 can be omitted. In the second embodiment, the inner cover 380 may be omitted, and the mounting portion 351 may be slid longitudinally relative to the scissors 310 so that the scissors can be displaced between the use position and the covering position. In this case, a guide surface for the restricting portion may be formed on the distal end surface of the mounting portion 351.

[0120] In the third embodiment, the attachment 450 in the covering position may be moved to the use position simply by rotating it 180° about the axis extending in the longitudinal direction. In the fourth embodiment, the attachment 550 may be attached to the second blade body 530 so as to be rotatable about an axis extending in the thickness direction. Even in this case, the attachment 550 can be displaced between the use position and the covering position.

[0121] The blade set according to the present invention is not limited to one including scissors 10, but may include a blade having only one elongated blade, such as the knife 210 of the second modified example shown in Figures 11 to 13.

[0122] As shown in Figures 11 to 13, the knife 210 has a long blade body 220 having a cutting point 221 and a cutting edge 222 extending from the cutting point 221. A guard member 240 is provided at a tip portion 224 of the blade body 220, including the cutting point 221, to cover a ridge 223 of the blade body 220 and to restrict the depth to which the blade body 220 can be inserted into an object by coming into contact with the object. A handle portion 229 is attached to the base end of the blade body 220. The blade body 220 does not have a stepped blade 25 as in the first embodiment.

[0123] The attachment 250 has the same or corresponding configuration as the attachment 50 of the first embodiment. Therefore, for the same or corresponding configuration as the attachment 50 of the first embodiment, the reference numeral "2**" is added by adding "200" to the reference numeral "**" of the first embodiment, and redundant explanations will be omitted. Such a blade set can achieve effects similar to the effects (1-1) to (1-4) and (1-6) to (1-10) of the first embodiment. [Explanation of symbols]

[0124] 10,310,410,510,610,710...Scissors 11,311,511,611,711...Connection shaft part 20,120,320,420,520,620,720…1st blade body 21,121,321,421,521,621,721... Tip 22,122,322,422,522,622,722…blade edge 23,123,323,523,623…mine 24,124,324,424,524,624,724…Tip part 25,125…Step blade 26,126…Insertion hole 29,329,429,529,629,729…1st handle 30,330,430,530,630,730…Second blade body 31... Tip 33,333,533,733…mine 39,339,439,539,639,739…Second handle 40, 140, 240, 340, 440, 540, 640, 740...Guard parts 50, 250, 350, 450, 550, 650, 750...Attachments 51,251,351...Attachment part 52,352,452,752...Bottom wall 53,353,453,553,653…Top wall 54,354,454,554,654,754…Side wall 55, 655, 755...Base end recess 56, 656, 756...Tip recess 57...Tip 58...Support shaft part 59...first engagement protrusion 60…Second engagement protrusion 70,270,370,470,570,670,770...Regulatory Department 71...Side 72...Connection part 73,273,373,473,573,673,773...Guide surface 74...Guide space 75…Display section 78…Support hole 79...Engagement hole 210...Knife 220…Blade body 221... Tip 222...blade edge 223...mine 224...Tip part 361...Slit 362…Narrow part 380...Inner cover 381...Base end recess 382...Operation unit 383...Connection part 460…Body part 461…Tip wall 462...Inner cylinder 534…Long hole 592...Piercing pin 657, 757...First engagement part 658, 758...Second engagement part 660...Regulation protrusion 759...Guide groove

Claims

1. A blade attachment is used when a blade having a long blade body with a cutting point and a blade edge extending from the cutting point and a handle is used as a cutter for opening or unpacking an object, and the blade attachment is attached to the blade body to regulate the depth at which the blade body can be inserted into the object, a mounting portion attached to the blade body; a restricting portion that restricts the insertion depth by contacting the object, The restricting portion has a guide surface that extends at an angle with respect to the longitudinal direction of the blade body and that abuts against the object to guide the sliding movement of the blade body relative to the object. Blade attachment.

2. the attachment portion is sheath-shaped and accommodates a portion of the blade body that is closer to the base end than the distal end portion including the cutting point, The restricting portion is provided at the tip end of the attachment portion.

2. The blade attachment according to claim 1.

3. The restricting portion is attached to the tip end portion of the mounting portion and is configured to be rotatable between a use position in which the tip end portion of the blade body is exposed and the guide surface extends at an angle with respect to the longitudinal direction of the blade body, and a covering position in which the tip end portion is covered.

3. The blade attachment according to claim 2.

4. the restricting portion has two side portions sandwiching the tip end of the attachment portion in the thickness direction of the blade body, and a connecting portion connecting the tip ends of the side portions to each other, A guide space that opens to the base end side of the side portion is formed between the side portions.

2. The blade attachment according to claim 1.

5. An attachment according to any one of claims 1 to 4; a blade having the blade body.

6. When the blade body is a first blade body, the blade is a pair of scissors including a second blade body rotatably connected to the first blade body, When the first blade body and the second blade body are closed, the cutting edge of the first blade body protrudes further than the cutting edge of the second blade body in the longitudinal direction.

6. The tool set according to claim 5.

7. A guard member is provided at the tip of the blade body to cover the ridge of the blade body and to restrict the insertion depth by coming into contact with the object.

6. The tool set according to claim 5.

8. A blade having a long blade body with a cutting point and a cutting edge extending from the cutting point, and a handle, which is used as a cutter for opening or unpacking an object, A guard member is provided at the tip of the blade body, including the cutting edge, to cover the ridge of the blade body and to restrict the insertion depth of the blade body into the object by coming into contact with the object. Blade.

9. When the blade body is a first blade body, the blade is a pair of scissors including the first blade body and a second blade body rotatably connected to the first blade body, When the first blade body and the second blade body are closed, the cutting edge of the first blade body protrudes further than the cutting edge of the second blade body in the longitudinal direction of the first blade body. The blade according to claim 8.

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