Cutting device

Abstract

To suppress generation of a sharp corner at a cut part.SOLUTION: A cutting device 10 for cutting an object 20 comprises: a lower member 1; an upper member 2 stacked above the lower member 1; a pressing member 3 stacked above the upper member 2; and a pair of struts 4, 4 which connects the lower member 1, the upper member 2 and the pressing member 3. The lower member 1 has a lower blade 11 recessed into a circular arc shape at one end thereof in a longer direction D1, and the upper member 2 has an upper blade 21 which is recessed into a circular arc shape and faces the lower blade 11. The upper member 2 is so connected to the lower member 1 elastically deformably, from a normal position where there is a clearance, in which the object 20 can be placed, between the upper blade 21 and the lower blade 11 to a cutting position where the upper blade 21 contacts the lower blade 11. The pressing member 3 has a protrusion 31 which presses the upper member 2 toward the lower member 1, and elastically deforms the upper member 2 with the protrusion 31 as a point of action. The pair of struts 4, 4 is separated from each other in a shorter direction D2 with a clearance, in which the object 20 can be placed, therebetween.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This invention relates to a cutting tool for cutting an object into a round shape.

Background Art

[0002] Conventionally, an inshlock (binding band) for bundling wire materials such as electric wires and cords has been known. For example, Patent Document 1 describes using an inshlock as a member for laying transmission paths such as electric wires and cords in a work vehicle. Depending on the thickness and number of wire materials bundled with the inshlock, there may be an excess in the length of the inshlock, and the excess portion of the inshlock is cut using, for example, nippers.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when cutting an object such as an inshlock, it is desirable to prevent a corner from being formed at the cutting portion in consideration of contact with other members or the fingers of the user. For example, if the cutting portion of the object can be formed into an arc shape (preferably a semi-circular arc shape), formation of a sharp corner can be avoided. However, when using a general nipper, since the angle (direction) of the cutting blade with respect to the object to be cut is not restricted, depending on the angle of the cutting blade with respect to the object, there is a risk that a corner may be formed at the cutting portion.

[0005] The cutting tool of this invention was devised in view of the above problems, and one of its objectives is to suppress the formation of a corner at the cutting portion.

Means for Solving the Problems

[0006] The present invention is made to solve at least a part of the above problems and can be realized as the following aspects or application examples.

[0007] (1) The cutting tool according to this aspect is a cutting tool for cutting an object, and includes a lower member having a lower blade that is recessed in an arc shape at one end in the longitudinal direction, and an upper blade that is recessed in an arc shape and faces the lower blade. The upper member is overlapped above the lower member, and is elastically deformable from a normal position where a gap for disposing the object is formed between the upper blade and the lower blade to a cutting position where the upper blade abuts against the lower blade, and is connected to the lower member. An upper member, a pressing member that has a convex portion that presses the upper member toward the lower member, is overlapped above the upper member, and elastically deforms the upper member with the convex portion as a point of action, and extends in the vertical direction to connect the lower member, the upper member, and the pressing member. And a pair of columns that are spaced apart from each other in the short direction with a gap for disposing the object. (2) The cutting tool according to this aspect is a cutting tool for cutting an object, and includes an upper member having an upper blade that is recessed in an arc shape at one end in the longitudinal direction, and a lower blade that is recessed in an arc shape and faces the upper blade. The lower member is overlapped below the upper member, and is elastically deformable from a normal position where a gap for disposing the object is formed between the lower blade and the upper blade to a cutting position where the lower blade abuts against the upper blade, and is connected to the upper member. A lower member, a pressing member that has a convex portion that presses the upper member toward the lower member, is overlapped above the upper member, and elastically deforms the lower member connected to the upper member with the convex portion as a point of action, and extends in the vertical direction to connect the lower member, the upper member, and the pressing member. And a pair of columns that are spaced apart from each other in the short direction with a gap for disposing the object.

[0008] According to this aspect, since the pair of support columns are spaced apart from each other in the short side direction with a gap where an object can be placed, when the object is cut, the object is placed between the support columns, so that the position of the object in the short side direction can be regulated. As a result, displacement of the object in the short side direction with respect to the lower blade and the upper blade is suppressed, so that the object can be more reliably cut in an arc shape by the lower blade and the upper blade. Therefore, it is possible to suppress the formation of corners at the cut portion of the object. As a result, the quality of the cut object can be improved, and the safety when another member or a user contacts the cut portion of the object can be improved.

[0009] (3) The cutting tool according to this aspect may further include a through hole formed at the other end in the longitudinal direction and through which the object can be inserted. According to such a configuration, the object can be placed over the longitudinal direction of the cutting tool. Therefore, even for an object that is longer than the longitudinal dimension of the cutting tool, the cutting operation becomes easier. Therefore, even for a long object, it is possible to easily suppress the formation of corners at the cut portion. Further, when the object is cut, the displacement of the object in the short side direction can be regulated at the other end in the longitudinal direction of the cutting tool by passing the object through the through hole. As a result, displacement of the object in the short side direction with respect to the lower blade and the upper blade is further suppressed, so that the object can be more reliably cut in an arc shape by the lower blade and the upper blade. Therefore, it is possible to more reliably suppress the formation of corners at the cut portion of the object.

[0010] (4) In the cutting tool according to this aspect, the dimension of the through hole in the short side direction may be equal to the gap between the pair of support columns. According to such a configuration, when the object is cut, the position of the object in the short side direction passed through the through hole can be regulated at the other end in the longitudinal direction of the cutting tool. As a result, displacement of the object in the short side direction with respect to the lower blade and the upper blade is more reliably suppressed, so that the object can be more reliably cut in an arc shape by the lower blade and the upper blade. Therefore, it is possible to more reliably suppress the formation of corners at the cut portion of the object.

[0011] (5) The cutting tool according to this aspect may further include an adjustment mechanism that makes at least one of the pair of support columns movable in the short side direction. According to such a configuration, the gap between the columns can be adjusted according to the width dimension of the object. Therefore, even when there are variations in the width dimension of the object, the position in the short-side direction of the object disposed between the columns can be regulated. Thus, it is possible to more reliably suppress the occurrence of corners at the cut portion of the object.

Effect of the Invention

[0012] According to the cutting tool of the present case, it is possible to suppress the occurrence of corners at the cut portion.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0014] With reference to the drawings, embodiments (aspects, application examples) of the present case will be described. The following embodiments are merely examples, and there is no intention of excluding various modifications and applications of technologies not explicitly stated in these embodiments. Each configuration of the following embodiments can be variously modified and implemented without departing from their gist. Also, selection can be made as necessary, or they can be appropriately combined.

[0015] [1. Structure] As shown in FIG. 1, the cutting tool 10 according to the present embodiment is a tool for cutting an object 20 and has a structure like a lever-type nail clipper. Here, as the object 20 to be cut by the cutting tool 10, a long plate-shaped (strip-shaped) member is exemplified. As an example of the object 20, an inshlock (binding band) used for bundling wire materials such as electric wires and cords can be mentioned. The inshlock is made of, for example, resin.

[0016] Here, for the cutting tool 10, a longitudinal direction D1, a lateral direction D2, and a vertical direction D3 that are perpendicular to each other are defined. The longitudinal direction D1 corresponds to the direction (length direction) in which the dimension of the cutting tool 10 is the largest. On the other hand, the lateral direction D2 corresponds to the direction (width direction) in which the dimension of the cutting tool 10 is smaller than the longitudinal direction D1. Further, the vertical direction D3 corresponds to the direction (height direction) that is perpendicular to both the longitudinal direction D1 and the lateral direction D2.

[0017] In the following description, one side of the longitudinal direction D1 (the left side in FIG. 1) is also referred to as the front, and the opposite side of the front (the other side of the longitudinal direction D1, which is the right side in FIG. 1) is also referred to as the rear. Also, the front end portion and the rear end portion of each member are defined based on this front-rear direction. Note that the vertical direction D3 is a direction defined for convenience with respect to the longitudinal direction D1 and the lateral direction D2, and does not necessarily correspond to the direction in which gravity acts.

[0018] The cutting tool 10 includes a lower member 1 having a lower blade 11, an upper member 2 having an upper blade 21, a pressing member 3 having a convex portion 31 that presses the upper member 2 toward the lower member 1, and a pair of columns 4, 4 that connect the lower member 1, the upper member 2, and the pressing member 3. In the present embodiment, an example of the cutting tool 10 is one in which the lower member 1, the upper member 2, and the pressing member 3 are all plate-shaped, and the pair of columns 4, 4 are all columnar. The cutting tool 10 is formed of, for example, steel material.

[0019] The lower member 1 is formed to be substantially flat, for example, except for the lower blade 11. The lower blade 11 is recessed in an arc shape at the front end portion (one end portion in the longitudinal direction D1) of the cutting tool 10. In other words, the lower blade 11 is formed in an arcuate shape that protrudes rearward from the front end portion of the cutting tool 10. The lower blade 11 of the present embodiment is in an arc shape of a substantially semi-circle when viewed from the vertical direction D3. The lower blade 11 faces upward so as to mesh with the upper blade 21 of the upper member 2.

[0020] The upper member 2 is stacked above the lower member 1. The upper member 2 is formed to be substantially flat, for example, except for the upper blade 21. The upper blade 21 is formed symmetrically with the lower blade 11 of the lower member 1 in the vertical direction. The upper blade 21 is recessed in an arc shape at the front end portion (one end portion in the longitudinal direction D1) of the cutting tool 10. In other words, the upper blade 21 is formed in an arcuate shape that protrudes rearward from the front end portion of the cutting tool 10. The upper blade 21 of the present embodiment is in an arc shape of a substantially semi-circle when viewed from the vertical direction D3. The upper blade 21 faces downward so as to mesh with the lower blade 11 of the lower member 1 and faces the lower blade 11 of the lower member 1.

[0021] The upper member 2 is connected to the lower member 1 so as to be elastically deformable. That is, the upper member 2 is connected to the lower member 1 and is elastically deformable and relatively movable with respect to the lower member 1. The upper member 2 of the present embodiment is connected to the lower member 1 by a fixing member 7 at its rear end portion (the other end portion in the longitudinal direction D1). Here, a pair of fixing members 7 spaced apart from each other in the short direction D2 are exemplified. The pair of fixing members 7 are arranged outside the short direction D2 of the through-hole 5 described later.

[0022] As shown in FIGS. 2 and 3, the upper member 2 is elastically deformable from the normal position P1 where the upper blade 21 forms a gap G1 (hereinafter also referred to as the blade gap G1) in which an object 20 can be disposed between the upper blade 21 and the lower blade 11 to the cutting position P2 where the upper blade 21 abuts against the lower blade 11. As shown in FIG. 2, the normal position P1 is set according to the size of the object 20 such that the blade gap G1 is larger than the thickness dimension of the object 20. On the other hand, as shown in FIG. 3, at the cutting position P2 where the upper member 2 is elastically deformed, the upper blade 21 meshes with the lower blade 11, so that the object 20 disposed in the blade gap G1 is cut by the lower blade 11 and the upper blade 21.

[0023] The pressing member 3 is stacked above the upper member 2. The pressing member 3 has, for example, a shape that is bent in a V shape along a straight line where a flat plate-like member extends in the short side direction D2. Therefore, the pressing member 3 forms a V shape when viewed from the short side direction D2. The convex portion 31 of the present embodiment corresponds to the lower end portion (bottom portion) of the V shape in the pressing member 3. The pressing member 3 further has a support portion 32 positioned in front of the convex portion 31 and an arm portion 33 positioned behind the convex portion 31. The support portion 32 is formed shorter than the arm portion 33 in the longitudinal direction D1.

[0024] The convex portion 31 abuts on the frontward portion in the longitudinal direction D1 of the upper member 2 (the portion in front of the middle portion of the upper member 2 in the longitudinal direction D1) from above. The pressing member 3 elastically deforms the upper member 2 with the convex portion 31 as the acting point. Specifically, for example, when a downward external force F is input to the arm portion 33 by an operation of pinching the arm portion 33 and the lower member 1 with the hand of an operator (pinching from the vertical direction D3 as when cutting a nail with nail clippers), the pressing member 3 applies a downward force F' from the convex portion 31 to the upper member 2 using the lever principle. Instead of this, for example, after fixing the lower member 1 to a pedestal or the like, a downward external force F may be input to the arm portion 33 by the hand of the operator. Also in this case, a downward force F' can be applied from the convex portion 31 to the upper member 2 using the lever principle.

[0025] At this time, in the pressing member 3, the input point of the external force F in the arm portion 33 becomes the force point, the connection point (shaft portion 34 described later) with the support column 4 in the support portion 3 becomes the fulcrum, and the convex portion 31 becomes the acting point. In this way, when the external force F is applied, the pressing member 3 elastically deforms the upper member 2 from the normal position P1 to the cutting position P2 by pressing the upper member 2 toward the lower member 1 with the convex portion 31. Also at this time, in the upper member 2, the input point of the force F' from the convex portion 31 becomes the force point, the connection point with the lower member 1 (the fixing member 7 in the present embodiment) becomes the fulcrum, and the upper blade 21 becomes the acting point. Then, the upper blade 21 meshes with the lower blade 11, enabling the object 20 to be cut.

[0026] The pair of support columns 4 are formed identically to each other. Each support column 4 extends in the vertical direction D3 and is provided in a state of penetrating the lower member 1, the upper member 2, and the pressing member 3 when viewed from the short-side direction D2. The support column 4 of the present embodiment is arranged between the front end portion (the lower blade 11 and the upper blade 21) of the cutting tool 10 and the fixing member 7 in the longitudinal direction D1. More specifically, the support column 4 is provided at a position overlapping the front end portion of the support portion 32 of the pressing member 3 in the longitudinal direction D1. That is, the support column 4 is provided in front of the convex portion 31 which is the acting point of the pressing member 3 (at a position closer to the lower blade 11 and the upper blade 21).

[0027] The lower end portion 41 of the support column 4 is fixed to the lower member 1. Further, the middle portion 42 of the support column 4 is passed through a through hole formed in the upper member 2 in order to make the upper member 2 slidable. The upper end portion 43 of the support column 4 is attached to the support portion 32 of the pressing member 3. A hole or a groove extending in the short-side direction D2 is formed in the upper end portion 43 of the support column 4. And a shaft portion 34 extending in the short-side direction D2 in the support portion 32 of the pressing member 3 is rotatably arranged in this hole or groove. Thereby, the upper end portion 43 of the support column 4 rotatably supports the support portion 32 of the pressing member 3. Note that the shaft portion 34 is press-fitted into the support portion 32, for example, and is made rotatable with respect to the support column 4. However, instead of this, the shaft portion 34 may be press-fitted into the support column 4 and made rotatable with respect to the support portion 32.

[0028] When the upper member 2 elastically deforms from the normal position P1 to the cutting position P2, the support portion 32 of the pressing member 3 rotates with respect to the upper end portion 43 of the support column 4, and the upper member 2 moves downward along the middle portion 42 of the support column 4. Thus, the support column 4 has a function of connecting the lower member 1, the upper member 2, and the pressing member 3 and guiding the vertical movement in the direction D3 of the upper member 2 accompanying the operation of the pressing member 3.

[0029] As shown in Fig. 4, a pair of support columns 4, 4 are spaced apart from each other in the short direction D2 with a gap G2 (hereinafter also referred to as the support column gap G2) where the object 20 can be placed. The support column gap G2 here corresponds to the distance between the inner ends of the pair of support columns 4 in the short direction D2. By being spaced apart from each other in the short direction D2 in this way, the pair of support columns 4 has the function of regulating the position of the object 20 in the short direction D2 when the lower blade 11 and the upper blade 21 cut the object 20. Note that the upper end portion 43 of the support column 4 in the present embodiment is disposed in a pair of recesses 35 formed at the front end portion of the support portion 32 of the pressing member 3, and interference with the support portion 32 of the pressing member 3 is avoided.

[0030] Preferably, the support column gap G2 is made slightly larger than the width dimension W1 of the object 20 (W1 < G2) so that the object 20 fits snugly between the support columns 4. However, when there are variations in the width dimension W1 of the object 20 to be cut, the support column gap G2 is preferably made slightly larger than the maximum width dimension W1 of the assumed object 20 so that even the object 20 with the largest width dimension W1 fits between the support columns 4.

[0031] Note that when the width dimension W1 of the object 20 is substantially uniform over the length direction of the object 20, the lower blade 11 and the upper blade 21 do not have to be formed in an arc shape in the region outside the short direction D2 from the support column gap G'. In other words, the lower blade 11 and the upper blade 21 are formed in an arc shape at least in the region of the short direction D2 corresponding to the support column gap G2. In the present embodiment, the lower blade 11 and the upper blade 21 that extend linearly along the short direction D2 in the region outside the short direction D2 from the support column gap G2 are illustrated. However, the shapes of the lower blade 11 and the upper blade 21 are not limited to the examples of the present embodiment, and for example, they may form an arc shape over the entire short direction D2 of the lower member 1 and the upper member 2.

[0032] The cutting tool 10 according to this embodiment further includes a through hole 5 (notch) formed at the rear end portion (the other end portion in the longitudinal direction D1). The through hole 5 is provided so that an object 20 can be inserted therethrough in the longitudinal direction D1 of the cutting tool 10. Here, the through hole 5 formed at the rear end portion of the upper member 2 is illustrated. However, the through hole 5 may be formed at the rear end portion of the cutting tool 10, may be formed at the rear end portion of the lower member 1 instead of the upper member 2, or may be formed at the rear end portions of both the lower member 1 and the upper member 2.

[0033] The through hole 5 is formed so that the object 20 can be inserted therethrough. The through hole 5 of this embodiment is substantially rectangular in top view, and its width dimension W2 (dimension in the short transverse direction D2) is set equal to the support gap G2 (W2 = G2). That is, the through hole 5 is slightly larger than the width dimension W1 (or the assumed maximum width dimension W1) of the object 20, similar to the support gap G2. Also, the position of the through hole 5 in the short transverse direction D2 coincides with the position of the support gap G2 in the short transverse direction D2. Therefore, when the object 20 is disposed in the support gap G2 along the longitudinal direction D1 of the cutting tool 10, it can extend rearward beyond the lower member 1 and the upper member 2 through the through hole 5.

[0034] When using the cutting tool 10 (when cutting the object 20), first, the object 20 is inserted into the cutting tool 10 with the upper member 2 in the normal position P1. Specifically, the object 20 is passed through the blade gap G1, the support gap G2, and the through hole 5 and provided in a state of penetrating along the longitudinal direction D1 of the cutting tool 10. In this way, the long object 20 is set with respect to the cutting tool 10 in a posture where its length direction coincides with the longitudinal direction D1 of the cutting tool 10.

[0035] At this time, as shown in FIG. 1, the object 20 is sandwiched between a pair of columns 4, 4 and passed through the through-hole 5 (between a pair of edges located on both sides in the short-side direction D2 of the through-hole 5 among the edges partitioning the through-hole 5 in the upper member 2), whereby the position in the short-side direction D2 is regulated. Thereby, displacement of the object 20 in the short-side direction D2 with respect to the lower blade 11 and the upper blade 21 is suppressed. Therefore, the object 20 is accurately positioned with respect to the lower blade 11 and the upper blade 21 by using the columns 4, 4 and the through-hole 5 as guides.

[0036] Next, as shown in FIG. 3, when an external force F is applied to the arm portion 33 of the pressing member 3 (although not shown, for example, when the external force F is applied to the arm portion 33 by pinching the arm portion 33 and the lower member 1), a downward force F' is applied from the convex portion 31 as the acting point in the pressing member 3 to the upper member 2 according to the lever principle. As a result, the upper member 2 is elastically deformed and moves to the normal position P1, and the upper blade 21 meshes with the lower blade 11. Thereby, as shown in FIG. 4, the object 20 is cut in an arc shape. That is, the cut portion C of the object 20 is in a curved shape forming an arc, and no corner appears in the used portion 23 separated from the surplus portion 22 of the object 20.

[0037] [2. Modification Example] As shown in FIG. 5, the cutting instrument 10 may further include an adjustment mechanism 6 that makes at least one of the pair of columns 4, 4 movable in the short-side direction D2. The adjustment mechanism 6 according to this modification example includes a guide opening 61 extending in the short-side direction D2 and a fastener 62 attached to the column 4. The guide opening 61 is provided to make the column 4 slidable (movable) in the short-side direction D2. On the other hand, the fastener 62 is provided to fix the position of the column 4 in the short-side direction D2. In FIG. 5, the same reference numerals are given to the same or corresponding elements as those in the above-described embodiment, and the following redundant description is omitted.

[0038] The guide openings 61 are provided in each of the lower member 1, the upper member 2, and the pressing member 3. Each guide opening 61 has a shape and arrangement that overlap each other when viewed from the vertical direction D3. The guide openings 61 of this modification extend over substantially the entire width direction D2 of the cutting tool 10. Each support column 4 is slidably disposed in the guide opening 61. More specifically, each support column 4 extends in the width direction D2 at the support portion 32 of the pressing member 3 and is supported by a shaft portion 34 press-fitted into the support portion 32, and is provided so as to be movable in the width direction D2. Thus, the adjustment mechanism 6 of this modification enables both of the pair of support columns 4, 4 to move in the width direction D2.

[0039] The fastener 62 is, for example, a nut, and by being fastened to the support column 4, the position of the support column 4 with respect to the guide opening 61 is fixed. In this modification, the fastener 62 attached to the lower end portion 41 of the support column 4 is illustrated. When the fastener 62 is fastened to the lower end portion 41 of the support column 4, it is pressed against the lower member 1 from below. Thereby, since the position of the fastener 62 with respect to the lower member 1 is fixed, the position of the support column 4 in the width direction D2 to which the fastener 62 is attached is also fixed. Note that, for example, screw processing is performed on the attachment destination of the fastener 62 (the lower end portion 41 of the support column 4 in this modification) so that the fastener 62 can be fastened.

[0040] When the cutting tool 10 according to this modification is in use (when cutting the object 20), first, the fastener 62 is loosened from the support column 4, so that the support column 4 can move in the width direction D2. Next, according to the width dimension W1 of the object 20, the support column 4 is slid along the guide opening 61 (see the double-headed arrow in FIG. 5). Thereby, the support column gap G2 is adjusted to match the width dimension W1 of the object 20.

[0041] Thereafter, while the adjusted support column gap G2 is maintained, the fastener 62 is fastened to the support column 4 again. Thereby, the position of the support column 4 in the width direction D2 is fixed, and the support column gap G2 is also fixed to the adjusted size. Thereafter, in the same procedure as in the above embodiment, the object 20 is cut by the cutting tool 10.

[0042] [3. Function and Effect] For example, when cutting an object 20 using a conventional nipper-type cutting tool, since the angle (orientation) of the cutting blade with respect to the object 20 is not restricted, if the cutting blade is disposed obliquely with respect to the object 20, there is a risk that a corner will appear at the cut portion of the object 20. Further, when using a conventional cutting tool, there is a risk that the shape of the cut portion will vary depending on the manner of cutting (the angle of the cutting blade with respect to the object 20) in this way. Furthermore, since the nipper-type cutting tool is arranged such that the longitudinal direction of the handle is substantially perpendicular to the length direction of the object 20, a large space is required during the cutting operation.

[0043] (1) In contrast, according to the cutting tool 10, since the pair of columns 4, 4 are spaced apart from each other in the short direction D2 with a gap G2 in which the object 20 can be disposed, when cutting the object 20, the object 20 is disposed between the columns 4, 4, so that the position of the object 20 in the short direction D2 can be regulated. Thereby, since the displacement of the position of the object 20 in the short direction D2 with respect to the lower blade 11 and the upper blade 21 is suppressed, the object 20 can be more reliably cut in an arc shape by the lower blade 11 and the upper blade 21. Therefore, it is possible to suppress the occurrence of a corner at the cut portion C of the object 20. As a result, the quality of the cut object 20 can be improved, and the safety when another member or the user contacts the cut portion C of the object 20 can be improved.

[0044] Also, according to the cutting tool 10, since the pair of columns 4, 4 serve as a guide for positioning the object 20 with respect to the lower blade 11 and the upper blade 21 as described above, the object 20 is more reliably cut in an arc shape, so that when cutting a plurality of objects 20, the cut portion C can be made uniform (uniformly or substantially uniformly). Furthermore, according to the cutting tool 10, since the lower blade 11 and the upper blade 21 that are recessed in an arc shape at one end portion in the longitudinal direction D1 are provided, the object 20 can be cut in a direction in which the longitudinal direction D1 of the cutting tool 10 coincides with the length direction of the object 20. Therefore, a large space is not required during the cutting operation, and a compact working space can be realized.

[0045] (2) If the through-hole 5 through which the object 20 can be inserted is formed at the other end in the longitudinal direction D1, the object 20 can be arranged over the longitudinal direction D1 of the cutting tool 10. Therefore, even for an object 20 that is longer than the dimension in the longitudinal direction D1 of the cutting tool 10, the cutting operation becomes easier. Thus, even for a long object 20, it is possible to easily suppress the occurrence of corners at the cutting portion C.

[0046] Also, when cutting the object 20, since the object 20 is passed through the through-hole 5, the displacement of the object 20 in the short-side direction D2 can be restricted at the rear end portion of the cutting tool 10. As a result, the displacement of the object 20 in the short-side direction D2 with respect to the lower blade 11 and the upper blade 21 is further suppressed, so that the object 20 can be cut more reliably in an arc shape by the lower blade 11 and the upper blade 21. Thus, it is possible to more reliably suppress the occurrence of corners at the cutting portion C of the object 20. Further, since the through-hole 5 serves as a guide for positioning the object 20 with respect to the lower blade 11 and the upper blade 21, the object 20 is cut more reliably in an arc shape, so that when cutting a plurality of objects 20, the cutting portion C can be made more uniform and reliable.

[0047] (3) If the width dimension W2, which is the dimension in the short-side direction D2 of the through-hole 5, is equal to the gap G2 between the pair of support columns 4, 4, when cutting the object 20, the position of the object 20 in the short-side direction D2 passed through the through-hole 5 can also be restricted at the rear end portion of the cutting tool 10. As a result, the displacement of the object 20 in the short-side direction D2 with respect to the lower blade 11 and the upper blade 21 is more reliably suppressed, so that the object 20 can be cut more reliably in an arc shape by the lower blade 11 and the upper blade 21. Thus, it is possible to more reliably suppress the occurrence of corners at the cutting portion C of the object 20.

[0048] (4) According to the adjustment mechanism 6 that makes at least one of the pair of support columns 4, 4 movable in the short-side direction D2, the gap G2 between the support columns 4, 4 can be adjusted according to the width dimension W1 of the object 20. Therefore, even when there are variations in the width dimension W1 of the object 20, the position of the object 20 in the short-side direction D2 arranged between the support columns 4, 4 can be restricted. Thus, it is possible to more reliably suppress the occurrence of corners at the cutting portion C of the object 20.

[0049] Moreover, according to the adjustment mechanism 6 that enables both of the pair of support columns 4, 4 to move in the short-side direction D2, in the short-side direction D2, the pair of support columns 4 can move symmetrically with respect to each other. Therefore, it is possible to avoid the situation where the pair of support columns 4 are arranged asymmetrically with respect to the lower blade 11 and the upper blade 21. As a result, the object 20 arranged between the support columns 4, 4 is more appropriately positioned with respect to the lower blade 11 and the upper blade 21. Thus, the object 20 can be more reliably cut into an arc shape by the lower blade 11 and the upper blade 21. Therefore, it is possible to more reliably suppress the occurrence of a corner at the cut portion C of the object 20.

[0050] [4. Others] The configuration of the cutting tool 10 shown in the above embodiment is an example. For example, the through-hole 5 may be omitted from the cutting tool 10. Also, the specific shapes of the lower member 1, the upper member 2, the pressing member 3, and the support columns 4 are not limited to the above examples. Note that the through-hole 5 may have a shape other than a rectangle, or its width dimension W2 may be different from the support-column gap G2.

[0051] The configuration of the above adjustment mechanism 6 is also an example. The adjustment mechanism 6 only needs to be able to move at least one of the support columns 4, 4 in the short-side direction D2. For example, only one of the support columns 4, 4 may be configured to be movable in the short-side direction D2, or the above clamp 62 may be omitted. Also, instead of the above clamp 62, another mechanism for fixing the position of the support column 4 may be provided. Furthermore, the cutting tool 10 may be provided with an adjustment mechanism (for example, a slider) for making the width dimension W2 of the through-hole 5 adjustable, and the width dimension W2 of the through-hole 5 may be adjusted to be the same as the support-column gap G2 by this adjustment mechanism being interlocked with the above adjustment mechanism 6.

[0052] The object 20 to be cut by the cutting tool 10 is not limited to the above inshlock. The cutting tool 10 is applicable to various objects that require an arc-shaped cut portion C. Also, from the perspective of restricting the position of the object 20 in the short-side direction D2 with respect to the lower blade 11 and the upper blade 21 by the pair of support columns 4, 4, the cutting tool 10 is suitable for cutting a long object 20.

[0053] In the cutting tool 10 shown in the above embodiment, the pressing member 3 elastically deforms the upper member 2 with the convex portion 31 as the acting point, thereby bringing the upper blade 21 into contact with the lower blade 11. However, the configuration of the cutting tool 10 is not limited to this, and the lower member 1 may be elastically deformed instead of the upper member 2, or both the upper member 2 and the lower member 1 may be elastically deformed. Also in this case, as described above, the downward force F' is applied from the convex portion 31 to the upper member 2 using the lever principle, but by elastically deforming the lower member 1 connected to the upper member 2, or both the upper member 2 and the lower member 1, it is possible to bring the upper blade 21 into contact with the lower blade 11.

[0054] For example, as shown in FIG. 6, in order to elastically deform the lower member 1, instead of the above-described lower member 1, a lower member 1' having a substantially U-shape (a shape convex upward) when viewed from the short-side direction D2 may be employed. Also in this case, for example, by pinching (clamping from the vertical direction D3) the arm portion 33 of the pressing member 3 and the lower member 1' by an operation such as cutting nails with nail clippers, as shown in FIG. 7, the substantially U-shaped lower member 1' when viewed from the short-side direction D2 can be elastically deformed into a linear direction. That is, in this case, when an upward external force F is applied to the pinched position (for example, in the vicinity of the fixing member 7) of the lower member 1' and an upward force F″ is applied to the position of the support column 4, the lower blade 11 elastically deforms to the cutting position where it comes into contact with the upper blade 21. In the modified examples shown in FIGS. 6 and 7, the same reference numerals are given to the same or corresponding configurations as those of the above embodiment. In order to elastically deform the upper member 2 or the lower members 1, 1', the material, plate thickness (dimension in the vertical direction D3), plate width (dimension in the short-side direction D2), shape, etc. of the upper member 2 or the lower members 1, 1' may be appropriately selected.

[0055] [5. Supplementary Note] Disclose the supplementary note regarding the above embodiment.

[0056] (Supplementary Note 1) A cutting tool for cutting an object, a lower member having a lower blade that is arcuately recessed at one end in the longitudinal direction, An upper member which has an upper blade that is concave in an arc shape and faces the lower blade, is overlapped above the lower member, and is connected to the lower member so as to be elastically deformable from a normal position where the upper blade forms a gap capable of disposing the object between the upper blade and the lower blade to a cutting position where the upper blade abuts against the lower blade. A pressing member which has a convex portion that presses the upper member toward the lower member, is overlapped above the upper member, and elastically deforms the upper member with the convex portion as a point of action. A pair of support columns which extend in the vertical direction, connect the lower member, the upper member, and the pressing member, and are spaced apart from each other in the short direction with a gap capable of disposing the object therebetween. A cutting tool, characterized by the above.

[0057] (Appendix 2) A cutting tool for cutting an object, comprising: An upper member having an upper blade that is concave in an arc shape at one end in the longitudinal direction; A lower member which has a lower blade that is concave in an arc shape and faces the upper blade, is overlapped below the upper member, and is connected to the upper member so as to be elastically deformable from a normal position where the lower blade forms a gap capable of disposing the object between the lower blade and the upper blade to a cutting position where the lower blade abuts against the upper blade. A pressing member which has a convex portion that presses the upper member toward the lower member, is overlapped above the upper member, and elastically deforms the lower member connected to the upper member with the convex portion as a point of action. A pair of support columns which extend in the vertical direction, connect the lower member, the upper member, and the pressing member, and are spaced apart from each other in the short direction with a gap capable of disposing the object therebetween. A cutting tool, characterized by the above.

[0058] (Appendix 3) Further comprising a through-hole formed at the other end in the longitudinal direction and capable of inserting the object therethrough. The cutting tool according to Appendix 1 or 2, characterized by the above.

[0059] (Appendix 4) The dimension of the through-hole in the short direction is equal to the gap between the pair of support columns. The cutting tool according to appended claim 3, characterized in that...

[0060] (Appended claim 5) It further comprises an adjustment mechanism for making at least one of the pair of struts movable in the transverse direction. The cutting tool according to any one of appended claims 1 to 3, characterized in that...

Explanation of reference numerals

[0061] 1, 1′ Lower member 2 Upper member 3 Pressing member 4 Strut 5 Through-hole 6 Adjustment mechanism 7 Fixing member 10 Cutting tool 11 Lower blade 20 Object 21 Upper blade 22 Surplus part 23 Used part 31 Protrusion 32 Support part 33 Arm part 34 Shaft part 35 Recess 41 Lower end part 42 Intermediate part 43 Upper end part 61 Guide opening 62 Fastener D1 Longitudinal direction D2 Transverse direction D3 Vertical direction F External force F′, F″ Forces G1 Blade clearance (clearance between lower blade and upper blade) G2 Strut clearance (clearance between a pair of struts) P1 Normal position P2 Cutting position W1 Width dimension of object W2 Width dimension of through-hole (dimension in transverse direction)

Claims

1. A cutting tool for cutting an object, comprising: a lower member having a lower blade that is recessed in an arc shape at one end in the longitudinal direction; an upper member having an upper blade that is recessed in an arc shape and faces the lower blade, being overlapped above the lower member, and being elastically deformable from a normal position where the upper blade forms a gap between the upper blade and the lower blade to a cutting position where the upper blade abuts against the lower blade and being connected to the lower member; a pressing member having a convex portion that presses the upper member toward the lower member, being overlapped above the upper member, and elastically deforming the upper member with the convex portion as a point of action; a pair of support columns that extend in the vertical direction, connect the lower member, the upper member, and the pressing member, and are spaced apart from each other in the short direction with a gap where the object can be disposed. A cutting tool, characterized by the above.

2. A cutting tool for cutting an object, comprising: an upper member having an upper blade that is recessed in an arc shape at one end in the longitudinal direction; a lower member having a lower blade that is recessed in an arc shape and faces the upper blade, being overlapped below the upper member, and being elastically deformable from a normal position where the lower blade forms a gap between the lower blade and the upper blade to a cutting position where the lower blade abuts against the upper blade and being connected to the upper member; a pressing member having a convex portion that presses the upper member toward the lower member, being overlapped above the upper member, and elastically deforming the lower member connected to the upper member with the convex portion as a point of action; a pair of support columns that extend in the vertical direction, connect the lower member, the upper member, and the pressing member, and are spaced apart from each other in the short direction with a gap where the object can be disposed. A cutting tool, characterized by the above.

3. Further comprising a through-hole formed at the other end in the longitudinal direction and through which the object can be inserted. The cutting tool according to claim 1 or 2, characterized by the above.

4. The dimension of the through-hole in the short direction is equal to the gap between the pair of support columns. The cutting tool according to claim 3, characterized by the above.

5. Further comprising an adjustment mechanism that makes at least one of the pair of support columns movable in the short direction. The cutting tool according to claim 1 or 2, characterized by the above.

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