Plastic model making forceps and cutting blade

Abstract

The present invention is directed to a novel configuration of a pliers and a cutting blade for cutting off a sprue connecting plastic model parts. The solution of the present invention is a pliers (1) for cutting off a sprue connecting plastic model parts, which rotatably connects a pair of half members (11A, 11B) to a connecting portion (3), and detachably provides a cutting blade (22) to one side half member (11A), and provides a receiving plate portion (24) facing the cutting blade (22) to the other side half member (11B), or detachably provides a cutting blade (22) to each half member (11A, 11B).

Description

Technical Field

[0001] This invention relates to a cutting tool, namely pliers and a cutting blade, and more specifically, to pliers for making plastic models, used to cut the gates of parts that connect plastic models and other models. Background Technology

[0002] Previously, for example, as disclosed in Patent Document 1, there is a known type of pliers used to cut off the gate portion of a part connected to a plastic model and thus cut off the part.

[0003] The problem in Patent Document 1 is to eliminate defects such as damage to parts or excessively long gates by leaving a gate of a fixed length.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2015-085183 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] As the number of cuts made with the pliers increases, the sharpness of the pliers will deteriorate, and poor cuts may occur, resulting in the inability to cut in one go and the need to make multiple cuts or to apply more force, which raises concerns about increasing the burden on the operator.

[0009] Furthermore, if the sharpness deteriorates, a flat cut surface cannot be formed, causing protrusions in the resin and resulting in what is known as whitening, which may detract from the appearance of the parts. Moreover, there are concerns that this will increase the workload of filing after the parts are cut.

[0010] The above-mentioned sharpness problems are caused by the wear and tear of the pliers' blades. The operator must discard the pliers with deteriorated sharpness and purchase new pliers.

[0011] Purchasing new pliers places a financial burden on users. Furthermore, discarding pliers that are practically unworn except for the blades creates an environmental burden and is far from being environmentally friendly.

[0012] Furthermore, considering the user's preference for using familiar tools over the long term, a novel pair of pliers is needed that responds to this user's preference.

[0013] In view of the above problems, the present invention proposes a novel configuration for pliers used to cut the gates of connected plastic model parts.

[0014] Technical solutions to the problem

[0015] The problem that this invention aims to solve is as described above, and the technical solution to solve this problem will be described next.

[0016] According to one embodiment of the present invention, a pair of pliers for making plastic models is provided, which is used to cut the gates or the like connecting plastic model parts. A pair of half-members are rotatably connected to a connecting part. A cutting blade is detachably provided on one half-member and a receiving plate portion facing the cutting blade is provided on the other half-member. Alternatively, a cutting blade may be detachably provided on each half-member.

[0017] Furthermore, according to one embodiment of the present invention, the cutting blade has a fixed portion, which is fixed to a blade fixing portion formed on the half-body member, and the fixed portion is pressed down by a fixing member that fixes the blade fixing portion and thus fixed to the blade fixing portion.

[0018] Furthermore, according to one embodiment of the present invention, the fixing member is fixed to the blade fixing part by means of the fixing device, and an insertion part is formed in the fixed part of the cutting blade. The insertion part is used to allow the cutting blade to be removed from the blade fixing part without interfering with the sliding of the fixing device when the fixing device is loosened and the fixing member is removed from the blade fixing part.

[0019] Furthermore, according to one embodiment of the present invention, the fixed portion is formed with a pair of insertion portions, and a through portion is formed between the pair of insertion portions. The through portion is configured to be generally U-shaped, and the fixing device is inserted into the through portion.

[0020] Furthermore, according to one embodiment of the present invention, a locking recess is formed on the bottom surface of the blade fixing part, and a locking protrusion is provided on the fixing member, wherein the locking protrusion is inserted into the locking recess while pressing the fixed part.

[0021] Furthermore, according to one embodiment of the present invention, the engaging protrusion of the fixing member is inserted into the insertion portion.

[0022] Furthermore, according to one embodiment of the present invention, the engaging protrusion is configured as an axis having two parallel walls, and is configured such that the inner end face of the insertion portion abuts against the wall surface, thereby defining a fixed angle of the cutting edge through this abutment.

[0023] Furthermore, according to one embodiment of the present invention, the fixing member is made of a plate-shaped plate, and at least one end face of the fixing member abuts against the side wall provided in the blade fixing part, thereby restricting the rotation of the fixing member.

[0024] Furthermore, according to one embodiment of the present invention, a closing angle adjustment mechanism is provided for adjusting the closing angle of the cutting operation section, which can adjust the angle of the cutting blade relative to the bearing plate section during cutting with high precision after the cutting blade is replaced.

[0025] Furthermore, according to one embodiment of the present invention, the bearing plate is detachably provided on the half-body component.

[0026] Furthermore, according to one embodiment of the present invention, a cutting blade for replacing pliers used in plastic model making is provided. The pliers are used to cut the gates or the like connecting plastic model parts. The cutting blade has a fixed portion, which is fixed to a blade fixing portion formed in a half-body member constituting the pliers. The fixed portion is pressed and fixed to the blade fixing portion by a fixing member that fixes the blade fixing portion. A through portion is formed in the fixed portion of the cutting blade. The through portion is used to allow the cutting blade to slide without interfering with the fixing member and be removed from the blade fixing portion when the fixing member is released.

[0027] Furthermore, according to one embodiment of the present invention, the fixed portion is formed with a pair of insertion portions, and a through portion is formed between the pair of insertion portions. The through portion is configured to be generally U-shaped, and the fixing device is inserted into the through portion.

[0028] Invention Effects

[0029] The present invention achieves the following effects.

[0030] That is, according to one embodiment of the present invention, the cutting blade can be replaced and the pliers can continue to be used, and it can be an environmentally friendly configuration that eliminates the need to purchase new pliers and reduces environmental burden. Furthermore, it also caters to users who prefer to use their preferred tools for extended periods. Attached Figure Description

[0031] Figure 1 This is an overall outline diagram of pliers used for making plastic models;

[0032] Figure 2 This diagram illustrates the situation where the gate connecting parts is cut off during plastic model making.

[0033] Figure 3 This is a diagram showing the structure of the cutting operation unit;

[0034] Figure 4 (A) is a diagram illustrating the cutting edge and the blade fixing part, etc.; (B) is a diagram showing the relationship between the cutting edge and the engaging protrusion, etc.; (C) is a diagram showing the state of fixing the cutting edge.

[0035] Figure 5 (A) is a diagram illustrating the cutting blade and blade fixing part, etc.; (B) is a diagram showing the state of cutting off the gate of the plastic model.

[0036] Figure 6 (A) is a diagram showing the state of a fixed cutting edge; (B) is a diagram illustrating the state of a sliding cutting edge.

[0037] Figure 7 (A) is a diagram showing the state of a fixed cutting edge; (B) is a diagram illustrating the state of a sliding cutting edge.

[0038] Explanation of reference numerals in the attached figures

[0039] 1: Pliers

[0040] 3: Connecting shaft

[0041] 5: Clamping material

[0042] 7: Elastic components

[0043] 9: Stopping components

[0044] 10: Grip Operation Section

[0045] 11A: Half-body component

[0046] 11B: Half-body component

[0047] 12: Blade fixing part

[0048] 12a: Bottom surface

[0049] 12b: Sidewall

[0050] 12c: Sidewall

[0051] 12d: Sidewall

[0052] 12m: Horizontal section

[0053] 12n: Inclined part

[0054] 13a: Fixing hole

[0055] 13b: Engagement recess

[0056] 14: Fixed components

[0057] 14a: Through hole

[0058] 14b: Engaging protrusion

[0059] 16: Fixtures

[0060] 20: Cutting Operations Department

[0061] 22: Cutting blade

[0062] 22a: Abdomen

[0063] 22b: Blade section

[0064] 22c: Tip

[0065] 22d: Back

[0066] 22e: Fixed part

[0067] 22f: Insertion section

[0068] 22g: Insertion part

[0069] 22h: Insertion section

[0070] 22k: The surface being pushed

[0071] 22m: Flat section

[0072] 24: Support plate

[0073] 24a: Bearing surface

[0074] 60: Gate Detailed Implementation

[0075] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0076] like Figure 1 As shown, the pliers 1 for making plastic models of the present invention are configured such that a pair of half-body components 11A and 11B are rotatably connected to the connecting part 3, a gripping operation part 10 is formed on one side of the connecting part 3, and a cutting operation part 20 is formed on the other side of the connecting part 3.

[0077] like Figure 2 As shown, the pliers 1 for making plastic models of the present invention are suitable for cutting the gate 60 of the part 62 and the runner 64 that connect the plastic model, and have the technology of maintaining sharpness well without causing the cut surface of the gate 60 to whiten.

[0078] The following is a detailed explanation, such as Figure 1 As shown, in the gripping operation unit 10, each of the half-components 11A and 11B is constructed from a rod-shaped component made of a metal such as stainless steel. In each half-component 11A and 11B, the area intended for the user to grip is covered with a clamping material 5 made of synthetic resin. The clamping material 5 is elastic, which reduces the direct transmission of the impact during cutting to the user's hand and prevents slippage during gripping.

[0079] In the gripping operation section 10, an elastic member 7 is disposed near the connecting part 3. The elastic member 7 is, for example, a coil spring, with one end abutting against the inner surface of the half-body member 11A and the other end engaging with the inner surface of the half-body member 11B. When the user grips the gripping operation section 10 and applies force, the elastic member 7 is clamped and contracted by the two half-body members 11A and 11B, thereby generating an elastic reaction force that imparts potential energy in the direction of opening the gripping operation section 10. In this way, during the cutting operation, a moderate reaction force can be felt while applying force, and the gripping operation section 10 automatically opens after cutting, making it easy to perform repeated cutting operations.

[0080] Furthermore, the half-body components 11A and 11B are provided with engaging portions 17 that engage with each other at a predetermined opening angle, thereby setting the opening angle of the gripping operation portion 10 in the unforced state to a predetermined angle. Consequently, the opening angle of the cutting operation portion 20 is also set to a predetermined angle.

[0081] In the gripping operation section 10, a stop member 9 is provided at a position further away from the connecting part 3 than the elastic member 7. The stop member 9 is, for example, a bolt with a flat abutment portion formed at its front end, which is stopped by a nut protruding from the inner side of one half-member 11B, and the front end of the bolt abuts against the inner side of the other half-member 11A. If the user grips the gripping operation section 10 and applies force, the stop member 9 clamps the two half-members 11A and 11B, thus restricting the rotation of the two half-members 11A and 11B. Therefore, even if further force is applied, the two half-members 11A and 11B will not rotate, thus preventing excessive force from being applied to the cutting operation section 20 and damaging the cutting blade 22 or the bearing plate 24.

[0082] Furthermore, the stop member 9 can be adjusted by loosening the nut 8 to increase the protrusion of the half-body member 11B, thereby forming a closing angle adjustment mechanism K for adjusting the closing angle of the cutting section 20. This closing angle adjustment mechanism K allows for high-precision adjustment of the angle between the cutting blade 22 and the supporting plate 24, achieving optimal sharpness. This configuration is particularly effective in configurations where the cutting blade 22 can be replaced.

[0083] like Figure 1 and Figure 3 As shown, the cutting operation section 20 is configured to have: a cutting blade 22, which is provided at the front end of the half-body member 11A on one side; and a supporting plate section 24, which is provided at the front end of the half-body member 11B on the other side.

[0084] like Figure 3 As shown, a blade fixing portion 12 for fixing the cutting blade 22 is formed at the front end of the half-body member 11A. The blade fixing portion 12 is configured to have: a bottom part 12a, which abuts against the bottom side of the cutting blade 22; a pair of side walls 12b and 12c, which stand upright from the bottom part 12a and face it; and a side wall 12d, which stands upright in connection with the pair of side walls 12b and 12c, and together with the pair of side walls 12b and 12c forms a wall that is approximately "U" shaped. In the blade fixing portion 12, no side wall is formed on the side facing the side wall 12d, which is configured as an open end 12x, and as described in detail later, so that the cutting blade 22 can slide into or be pulled out of the blade fixing portion 12.

[0085] like Figure 3As shown, a fixing member 14 is fixed to the blade fixing part 12. The fixing member 14 is used to clamp and fix the fixing part 22e of the cutting blade 22. The fixing member 14 is made of a plate-shaped piece and has a through hole 14a extending through the plate thickness direction. The shaft part 16a of the fixing device 16 is inserted into the through hole 14a through the through hole 14a, and the shaft part 16a of the fixing device 16 is inserted into the fixing hole 13a of the bottom part 12a. In addition, in this embodiment, the fixing device 16 is provided as a hexagonal bolt and the fixing hole 13a is provided as a screw hole, but it is not limited to this configuration. It can also be made of a component that can be fixed without the use of a hexagonal wrench or the like.

[0086] like Figure 3 and Figure 4 As shown in (A) and (B), in the blade fixing part 12, an open end 12x is formed on the side facing the side wall 12d without forming a side wall. The open end 12x is configured to be inclined in such a way that the closer it is to the receiving plate part 24, the further it is in the insertion direction of the cutting blade 22. As a result, the distance 22L of the blade part 22b is lengthened, and a wider area for cutting can be ensured.

[0087] like Figure 3 and Figure 4 As shown in (A) and (B), in the fixing member 14, the engaging protrusion 14b protrudes and inserts into the engaging recess 13b of the bottom part 12a, thereby restricting the rotation of the fixing member 14 and preventing the fixing device 16 from loosening. Furthermore, for example, the engaging protrusion 14b is configured as an axis with two parallel walls. Similarly, the cross-section of the engaging recess 13b of the bottom part 12a is set as an elongated hole and formed as an interlocking structure. Alternatively, their respective cross-sections can be set as rectangles, etc.

[0088] like Figure 3 and Figure 4 As shown in (C), the fixing member 14 is constructed of a generally rectangular plate-shaped member, and its three side end faces abut against the side walls 12b, 12c, and 12d, respectively. This restricts the rotation of the fixing member 14 and prevents the fixing device 16 from loosening. Furthermore, the shape of the fixing member 14 is not particularly limited to a rectangle, as long as it restricts the rotation of the fixing member 14 by abutting against the side walls of the blade fixing part 12 with its side end faces.

[0089] like Figure 3 As shown, in the fixing member 14, the end 14c on the side near the front end of the pliers 1 is configured to gradually thin out, and on the front end side of the pliers 1, the junction of the cutting blade 22 and the fixing member 14 is configured not to form a large step difference.

[0090] like Figure 3 and Figure 4As shown in (A), the cutting edge 22 is configured to have a belly 22a, a blade edge 22b, a tip 22c, a back 22d, and a fixed portion 22e. The cutting edge 22 is detachable from the blade fixing portion 12 and is configured to be replaceable, serving as a so-called replacement blade. The thickness H of the cutting edge 22 is... Figure 5 The thickness of (A) is set to be relatively thin at its thickest point, ranging from 0.8 mm to 1.0 mm. It is preferably a thickness that provides excellent sharpness and ensures sufficient strength when cutting the gate of the plastic model.

[0091] like Figure 3 and Figure 4 As shown in (A), a generally U-shaped insertion portion 22h, which is open on the side opposite to the tip portion 22c, is formed in the fixed portion 22e of the cutting blade 22. The shaft portion 16a and the engaging protrusion 14b of the fixing device 16 are inserted into this insertion portion 22h. In the fixed portion 22e, two insertion portions 22f and 22g are formed such that the insertion portion 22h is arranged therebetween. The cutting blade 22 is positioned relative to the blade fixing portion 12 by the front ends of the insertion portions 22f and 22g abutting against the side wall 12d.

[0092] Furthermore, by connecting the shaft portion 16a of the fixing device 16 to the engaging protrusion 14b in the insertion portion 22h, the cutting blade 22 can be pulled out straight by guiding its movement at two points via the engaging protrusion 14b when it slides. If either the shaft portion 16a or the engaging protrusion 14b were to be guided at a single point, the rotation of the cutting blade 22 in the horizontal plane could not be restricted, raising concerns about injury to fingers due to unexpected rotation. This embodiment achieves a safer configuration.

[0093] like Figure 5 As shown in (A), a bottom portion 22m is formed on the fixed portion 22e of the cutting blade 22, and the bottom portion 22m has a uniform thickness. On the other hand, a horizontal portion 12m corresponding to the bottom portion 22m is formed on the bottom portion 12a of the blade fixing portion 12. Furthermore, the insertion portions 22f and 22g of the cutting blade 22 abut against the horizontal portion 12m.

[0094] like Figure 5 As shown in (A), the depth D of the bottom portion 12a of the blade fixing part 12 is configured to be deeper than the thickness H of the fixed portion 22e of the cutting blade 22, thereby accommodating the fixed portion 22e of the cutting blade 22 within the blade fixing part 12. Then, with the fixed portion 22e (bottom portion 22m) of the cutting blade 22 placed on the bottom portion 12a, the upper surface of the fixed portion 22e (insertion portions 22f, 22g) of the cutting blade 22 forms a flat pressing surface 22k. By pressing this flat pressing surface 22k from above with the fixing member 14 and locking the fixing device 16, as... Figure 5 As shown in (B), the cutting edge 22 is fixed to the blade fixing part 12.

[0095] like Figure 6 (A) and Figure 7 As shown in (A), the cutting blade 22 is fixed by the fixing member 14 pressing it down from above by the locking fixture 16, and is used to cut off gates (not shown) when making plastic models.

[0096] Then, in the case where the sharpness of the cutting edge 22 deteriorates, such as Figure 6 (B) and Figure 7 As shown in (B), the cutting edge 22 is replaceable. Specifically, by loosening the retainer 16 to reduce the pressure on the cutting edge 22 caused by the retaining member 14, the cutting edge 22 can slide and be pulled out from the blade retaining part 12. Figure 7 In (B), the state in which the cutting blade 22 can slide is indicated by forming a gap D between the fixed member 14 and the cutting blade 22.

[0097] Here, since the insertion portion 22h of the cutting blade 22 is approximately U-shaped, the cutting blade 22 can be pulled out simply by loosening the retaining bracket 16 without removing it. Furthermore, when installing a new, unused cutting blade 22, the cutting blade 22 can be inserted while the retaining member 14 is temporarily fixed by the retaining bracket 16. In this way, the replacement of the blade retaining portion 12 can be easily performed.

[0098] Furthermore, there are no particular limitations on the shape of the through portion 22h formed on the fixed portion 22e, or the number or shape of the insertion portions 22f and 22g. For example, it may be configured to have only the insertion portion 22f, as long as the configuration does not cause interference between the fixing device 16 and the fixed portion 22e when the cutting blade 22 is replaced.

[0099] Furthermore, since the cutting blade 22 can be replaced without removing the fixture 16, it can prevent small parts, i.e., the fixture 16 or the fixing member 14, from falling off or being lost due to falling off, and can also prevent the time and labor spent on aligning the holes of the fixture 16 or the fixing member 14 and reinstalling them, thus achieving a configuration that is easy to handle.

[0100] In particular, since the cutting blade 22 has a sharp part, namely the blade tip 22b, there is a risk of injury to fingers if the fixing device 16 or fixing member 14 is processed at the same time as the cutting blade 22. However, since the fixing device 16 or fixing member 14 can be temporarily fixed, as long as care is taken in the processing of the cutting blade 22, a design with excellent safety can be achieved.

[0101] like Figure 5As shown in (B), the bearing plate portion 24 has a flat bearing surface 24a facing the cutting edge portion 22b of the cutting blade 22. For example, when cutting off the gate 60 connected to the part of the plastic model, while supporting one side of the gate 60 with the bearing surface 24a, the cutting edge portion 22b of the cutting blade 22 cuts in from the opposite side of the gate 60, reaching the bearing surface 24a through the cutting edge portion 22b and completely cutting off the gate 60.

[0102] In addition, the bearing plate 24, besides being connected to the half-body member 11B ( Figure 3 In addition to being formed as a single unit, it can also be fixed to the half-body component 11B. Figure 3 It is composed of other components. Furthermore, the supporting plate 24 is configured to be able to support the half-body component 11B ( Figure 3 The plate can be installed and removed, or it can be designed to be replaceable. In this case, for example, consider configuring the bearing plate 24 so that the cutting edge 22b of the cutting blade 22 is changed to the bearing surface 24a. Furthermore, it can be configured to replace the bearing plate 24 with another cutting blade, or it can be configured to form a pair of pliers with so-called double blades.

[0103] The present invention can be implemented in the manner described above.

[0104] That is, such as Figures 1 to 7 As shown,

[0105] A pair of pliers 1 for cutting off gates and other components used in connecting plastic model parts.

[0106] The clamp 1 rotatably connects a pair of half-body components 11A and 11B to the connecting part 3.

[0107] A cutting blade 22 is detachably provided on one half-body member 11A, and a receiving plate portion 24 facing the cutting blade 22 is provided on the other half-body member 11B, or

[0108] Each half-body component 11A and 11B is provided with a cutting blade 22 that can be detached from the body.

[0109] Therefore, the cutting blade 22 can be replaced and the pliers can continue to be used without purchasing new pliers, making it an environmentally friendly option that also reduces the environmental burden. Furthermore, it also caters to users who prefer to use their preferred tools for extended periods.

[0110] And, as Figure 3 As shown,

[0111] The cutting blade 22 has a fixed portion 22e, which is fixed to the blade fixing portion 12 formed on the half-body member 11A. The fixed portion 22e is pressed down by the fixing member 14 that fixes the blade fixing portion 12 and is fixed to the blade fixing portion 12.

[0112] Therefore, by pressing the fixed part 22e with the fixing member 14, the cutting blade 22 can be reliably fixed.

[0113] And, as Figure 3 and Figure 4 As shown in (A) and (B),

[0114] The fixing member 14 is fixed to the blade fixing part 12 by means of the fixing device 16.

[0115] An insertion portion 22h is formed in the fixed portion 22e of the cutting blade 22.

[0116] The insertion part 22h is used to remove the cutting blade 22 from the blade fixing part 12 without interfering with the sliding of the fixing part 16 while the fixing member 14 is removed from the blade fixing part 12 without loosening the fixing part 16.

[0117] Therefore, since the cutting blade 22 can be replaced without removing the fixture 16, the time and labor required for small parts, i.e., the fixture 16 or the fixing member 14, to fall off or be lost due to falling off, as well as for aligning the holes of the fixture 16 or the fixing member 14 and reinstalling, can be reduced, thus achieving a configuration that is easy to handle.

[0118] And, as Figure 4 As shown in (B) and (C),

[0119] The fixed part 22e is formed with a pair of insertion parts 22f and 22g.

[0120] A through portion 22h is formed between a pair of insertion portions 22f and 22g.

[0121] The insertion section 22h is roughly U-shaped.

[0122] The fixing device 16 is inserted into the insertion part 22h.

[0123] Thus, the cutting blade 22 can be detached from the blade fixing part 12 by means of the fixing part 16 sliding between the insertion parts 22f and 22g.

[0124] And, as Figure 3 and Figure 4 As shown in (A) and (B),

[0125] A locking recess 13b is formed on the bottom part 12a of the blade fixing part 12.

[0126] The fixing member 14 is provided with a locking protrusion 14b, which is inserted into the locking recess 13b when pressing the fixed part 22e.

[0127] Thus, by inserting the engaging protrusion 14b into the engaging recess 13b of the bottom part 12a, the rotation of the fixing member 14 is restricted, thereby preventing the fixing device 16 from loosening.

[0128] And, as Figure 4 As shown in (B),

[0129] The engaging protrusion 14b of the fixing member 14 is inserted into the insertion part 22h.

[0130] Therefore, when the cutting blade 22 slides, the moving direction of the cutting blade 22 can be guided by the engaging protrusion 14b at two points, so that the cutting blade 22 can be pulled out straight.

[0131] And, as Figure 4 As shown in (B),

[0132] The engaging protrusion 14b is configured as an axis having two parallel wall surfaces 14x, 14x, and is configured such that the inner end faces 22m, 22m of the insertion portion 22h abut against the wall surfaces 14x, 14x.

[0133] The fixed angle of the cutting edge 22 is determined by this contact.

[0134] Therefore, the fixed angle of the cutting edge 22 in the horizontal plane can be defined by the engaging protrusion 14b, and defects such as deterioration of sharpness caused by deviation of the fixed angle of the cutting edge 22 can be prevented.

[0135] And, as Figure 3 As shown,

[0136] The fixing component 14 is composed of plate-shaped plates.

[0137] At least one end face of the fixing member 14 abuts against the side wall of the blade fixing part 12, thereby restricting the rotation of the fixing member 14.

[0138] This restricts the rotation of the fixing member 14, thus preventing the fixing device 16 from loosening.

[0139] and, Figure 3 The supporting plate 24 shown is detachably mounted on the half-body component 11B.

[0140] Therefore, for example, in the case where the sharpness of the bearing plate 24 is reduced due to damage, the bearing plate 24 can be replaced, and the pliers can continue to be used without replacing them.

[0141] And, as Figure 1 As shown, a closing angle adjustment mechanism K is provided for adjusting the closing angle of the cutting operation section 20, which can adjust the angle of the cutting blade 22 relative to the bearing plate section 24 with high precision after the cutting blade 22 is replaced.

[0142] Therefore, after replacing the cutting edge 22, the angle between the cutting edge 22 and the supporting plate 24 during gate removal can be precisely adjusted to achieve the desired sharpness. Especially in configurations where the cutting edge 22 can be replaced, there are concerns that deviations in the user's installation may affect the sharpness of the gate or cause whitening of the cut surface. Therefore, by providing a closing angle adjustment mechanism K, the so-called contact condition when the cutting edge 22 and the supporting plate 24 are fully closed can be adjusted, providing the user with an excellent user experience. This technology differs from ordinary pliers used for cutting wires or metal wires; it addresses a unique challenge in the field of plastic model making where the aesthetics of the gate's cut surface are extremely important, and is entirely different from technologies that only allow for the replacement of the cutting edge 22.

[0143] And, as Figures 1 to 7 As shown,

[0144] A replaceable cutting blade 22 for pliers used in plastic model making, the pliers 22 being used to cut off gates, etc., connecting plastic model parts.

[0145] The cutting blade 22 has a fixed portion 22e that is fixed to the blade fixing portion 12 formed in the half-body member 11A constituting the pliers 1.

[0146] The fixed part 22e is pressed down by the fixing member 14 that fixes the blade fixing part 12 and is thus fixed to the blade fixing part 12.

[0147] An insertion portion 22h is formed in the fixed portion 22e of the cutting blade 22.

[0148] The insertion part 22h is used to remove the cutting blade 22 from the blade fixing part 12 without interfering with the sliding of the fixing part 16 while the fixing member 14 is removed from the blade fixing part 12 without loosening the fixing part 16.

[0149] And, as Figure 4 As shown in (B) and (C),

[0150] The fixed part 22e is formed with a pair of insertion parts 22f and 22g.

[0151] A through portion 22h is formed between a pair of insertion portions 22f and 22g.

[0152] The insertion section 22h is roughly U-shaped.

[0153] The fixing device 16 is inserted into the insertion part 22h.

Claims

1. A plastic model making forceps characterized by comprising: Used to cut off the gates connecting plastic model parts. The pliers used for making the plastic model are A pair of half-body components are rotatably connected to the connecting part. One half-member is detachably provided with a cutting blade, and the other half-member is provided with a bearing plate portion facing the cutting blade, or A pair of half-body components are rotatably connected to the connecting part. The component is configured such that the cutting blade is detachably provided in each half-body component. The cutting edge has a fixing portion, which is fixed to the blade fixing portion formed on the half-body component. The fixed part is pressed down by the fixing member that fixes the blade fixing part and is thus fixed to the blade fixing part. The fixed part slides in the direction extending from the cutting edge of the blade and is fixed by inserting into the blade fixing part. The fixed part slides in the direction extending from the cutting edge of the blade and is removed from the blade fixing part. The fixing member is fixed to the blade fixing part by means of a fixing device. An insertion portion is formed in the fixed portion of the cutting blade. The insertion part is used to remove the cutting blade from the blade fixing part without interfering with the sliding of the fixing part when the fixing member is released without removing the fixing member from the blade fixing part.

2. A plastic model making forceps according to claim 1, wherein The fixed part has a pair of insertion parts. The through portion is formed between the pair of insertion portions. The insertion part is roughly U-shaped. The fastener is inserted into the insertion part.

3. A plastic modelling tongs according to claim 2, wherein A locking recess is formed on the bottom surface of the blade fixing part. The fixing member is provided with a locking protrusion, which is inserted into the locking recess when pressing the fixed part.

4. A plastic modelling tongs according to claim 3, wherein The engaging protrusion of the fixing member is inserted into the insertion portion.

5. A plastic modelling tongs according to claim 4, wherein The engaging protrusion is configured as an axis with two parallel walls, and is arranged such that the inner end face of the insertion part abuts against the wall. The fixed angle of the cutting edge is determined by the abutment.

6. A plastic modelling tongs according to claim 5, wherein The fixing component is composed of plate-shaped plates. At least one end face of the fixing member abuts against the side wall of the blade fixing part, thereby restricting the rotation of the fixing member.

7. A plastic modelling tongs according to claim 6, wherein A closing angle adjustment mechanism is provided for adjusting the closing angle of the cutting operation section, which can adjust the angle of the cutting blade relative to the bearing plate with high precision after the cutting blade is replaced.

8. A plastic model making forceps according to any one of claims 1 to 7, characterized in that, The supporting plate is detachably mounted on the half-body component.

9. A cutting blade for a plastic model making pliers for replacement, characterized by, The pliers used for making plastic models are used to cut off the gates connecting the plastic model parts. The cutting blade has a fixing portion, which is fixed to the blade fixing portion formed in the half-body component constituting the pliers. The fixed part is pressed down by the fixing member that fixes the blade fixing part and is thus fixed to the blade fixing part. The fixed part slides in the direction extending from the cutting edge of the blade and is fixed by inserting into the blade fixing part. The fixed part slides in the direction extending from the cutting edge of the blade and is removed from the blade fixing part. An insertion portion is formed in the fixed portion of the cutting blade. The insertion portion is configured to allow the cutting blade to be removed from the blade fixing portion without interfering with the fixing tool, in a state where the fixing tool is loosened without the fixing member being removed from the blade fixing portion.

10. The cutting blade for replacement of a plastic model making pliers according to claim 9, wherein The fixed portion is formed with a pair of insertion portions, The insertion portion is formed between the pair of insertion portions, The insertion portion is configured to be substantially U-shaped, The fixing tool is inserted into the insertion portion.

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