Cutting tools for resin materials

Abstract

To provide a cutting instrument for a resin material which can firmly hold and cut a columnar resin material.SOLUTION: A cutting instrument for cutting a columnar resin material includes: a mounting part where a first part of the resin material is mounted; a pressing member for pressing at least a part of the first part of the resin material mounted on the mounting part; and a cutting member for cutting a second part of the resin material projecting from the mounting part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cutting tool for cutting a resin material used in resin molding. [Background technology]

[0002] Transfer molding machines for resin molding semiconductor chips use tablet-shaped resin, which is made by solidifying granular or powdered resin. These tablet-shaped resins are obtained by cutting long resin tablets along a direction perpendicular to the axial direction of the resin tablet to the volume required for resin molding (packaging). For example, in Patent Document 1, a long tablet is extruded using a plunger-type measuring machine and then cut with a cutter to a length corresponding to the required volume, thereby obtaining mini-tablets of the required volume. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-109772 Summary of the Invention [Problem to be solved by the invention]

[0004] The long tablets described in Patent Document 1 are hard, and in order to cut them with a cutter, the long tablets need to be held firmly and cut, but Patent Document 1 does not describe the specific structure for holding them.

[0005] The present invention has been made in consideration of the above points, and an object of the present invention is to provide a cutting tool for resin material that can firmly hold and cut columnar resin material. [Means for solving the problem]

[0006] The characteristic configuration of the cutting instrument of the present invention is that it is a cutting instrument for cutting columnar resin material, and is equipped with a mounting portion on which a first portion of the resin material is mounted, a pressing member that presses at least a part of the first portion of the resin material mounted on the mounting portion, and a cutting member that cuts a second portion of the resin material protruding from the mounting portion. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a resin material cutting tool that can firmly hold and cut a columnar resin material. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a cutting instrument according to a first embodiment. [Figure 2] Schematic front view of the cutting tool. [Figure 3] FIG. [Figure 4] FIG. [Figure 5A] FIG. 10 is a cross-sectional view illustrating a protruding member provided on the placement portion of the cutting unit. [Figure 5B] FIG. 10 is a cross-sectional view illustrating a protruding member provided on the placement portion of the cutting unit. [Figure 6] Schematic plan view of a cutting tool. [Figure 7] Schematic front view of the cutting tool. DETAILED DESCRIPTION OF THE INVENTION

[0009] In the following explanation, the directions indicated by arrows U, D, L, R, F, and B in the drawings are defined as the upward, downward, leftward, rightward, forward, and backward directions, respectively. For the sake of convenience, the shapes, positions, dimensions, etc. of the components in the drawings are exaggerated as appropriate.

[0010] <Overall composition> A cutting instrument according to a first embodiment of the present invention will be described with reference to the drawings. The resin material T used in this embodiment is a cylindrical material obtained by solidifying powder of a resin (e.g., a thermosetting resin or a thermoplastic resin) used in resin molding, for example, by tableting, and is sometimes called a tablet resin or a mini-tablet.

[0011] 1 is a perspective view showing a cutting instrument 1 according to a first embodiment. In the cutting instrument 1, a first portion of a columnar resin material T is placed on a mounting portion 2. The first portion of the resin material T placed on the mounting portion 2 is pressed down by a pressing member 3, and a second portion of the resin material T protruding from the mounting portion 2 is cut by a cutting member 4.

[0012] The mounting portion 2 is fixed onto a substantially flat base 5. Four legs 7 are fixed to the four corners of the underside of the base 5. The mounting portion 2 includes two mounting members 21 each having the shape of a rectangular parallelepiped block with one side cut out, and the two mounting members 21 are attached onto the base 5 so that the cutout portions form a substantially V-shaped space S in a front view. The columnar resin material T is placed with a portion of the side surface of the resin material T (first portion) disposed in this space S and a portion of the resin material T (second portion) protruding forward from the mounting member 21.

[0013] The pressing member 3 includes a rectangular parallelepiped block-shaped lid portion 31 that closes the space between the upper ends of the two mounting members 21, i.e., that closes the top of the space S formed by the cut-out portions of the two mounting members 21. A flat pressing portion 32 is attached to the lid portion 31 so as to be movable up and down relative to the lid portion 31. By moving the pressing portion 32 up and down and bringing it into contact with the side of the first portion of the resin material T placed in the space S of the mounting member 21, the resin material T can be fixed and held on the mounting portion 2. With the resin material T fixed and held on the mounting portion 2, the second portion of the resin material T can be cut by the cutting member 4.

[0014] The cutting member 4 has a rectangular column shape, and one end is attached to an end surface 213, which is the front surface of one of the mounting members 21 (in this embodiment, the first mounting member 21 on the right side), via a rotation shaft 43. A blade portion 42 is provided on the opposing surface (rear side) of the cutting member 4 that faces the end surface 213. The rotation shaft 43 extends in the front-to-rear direction. The cutting member 4 can rotate about the rotation shaft 43 along the end surface 213 of the mounting member 21. When the cutting member 4 rotates along the end surface 213 of the mounting member 21 (in this embodiment, it rotates counterclockwise when viewed from the front), the blade portion 42 of the cutting member 41 cuts the second portion of the resin material T protruding from the mounting member 21.

[0015] A storage section 6, which is a box with one open side, is arranged below the base section 5. The second portion of the resin material T cut by the cutting member 4 falls into the storage section 6 through the opening of the storage section 6 and is stored therein.

[0016] A protruding member 24 protrudes forward from an end surface 213 of the mounting member 21 (in this embodiment, the first mounting member 21 on the right side). The protruding member 24 is movable in a direction perpendicular to the end surface 213 of the mounting member 21. When the protruding member 24 protrudes, the cutting member 4 hits the protruding member 24 and stops its rotational movement.

[0017] Each part will be described in detail below with reference to Figs. 1 to 7. Fig. 1 shows a state in which the rotational movement of the cutting member 4 is stopped by the protruding member 24. Fig. 2 does not show the storage section 6, shows the resin material T with a two-dot chain line, and shows the trajectory K of the blade with a dotted line. Figs. 3 and 4 show a state in which the pressing member 3 has been removed. Fig. 4 does not show the cutting member 4, and shows the resin material T placed on the placement section 2 with a dotted line. Fig. 7 does not show the storage section 6.

[0018] <Placement section> The mounting section 2 includes two mounting members 21, each of which has a shape in which a portion of a rectangular parallelepiped block is cut out along one side. As shown in FIGS. 1 to 3, the two mounting members 21 are fixed on the base 5 and are arranged facing each other at the center in the left-right direction with a certain distance d between them. For ease of explanation, in this embodiment (see, for example, FIGS. 2 and 3), the right-side mounting member 21 may be referred to as the first mounting member 21 and the left-side mounting member 21 as the second mounting member 21. The two mounting members 21 are arranged so that their cutout portions form a V-shaped space S when viewed from the front.

[0019] As described above, the opposing surfaces of the two mounting members 21 have a vertical surface 211 that rises vertically from the upper surface of the base 5, and inclined surfaces 212 that rise diagonally upward from the vertical surface 211 and move away from each other. That is, the inclined surface 212 of the first mounting member 21 on the right side is inclined diagonally upward to the right, and the inclined surface 212 of the second mounting member 21 on the left side is inclined diagonally upward to the left, and the two inclined surfaces 212 are inclined upward so as to move away from each other.

[0020] Two opposing vertical surfaces 211 form a groove 22 extending in the front-to-rear direction. The groove 22 is open at the front and rear. Two opposing inclined surfaces 212 rise obliquely upward from the edge of each groove 22, and the left-to-right distance between the two inclined surfaces 212 increases as they move away from the groove 22, i.e., upward. An upper surface 215 extends from the upper end of the inclined surfaces 212, and the upper surface 215 is flat.

[0021] Both end surfaces of the mounting member 21, i.e., front-rear end surfaces 213, 214, are perpendicular to the upper surface 215, and the length of the mounting member 21 in the front-rear direction is shorter than the length of the base 5 in the front-rear direction. The distance from the right end of the first mounting member 21 on the right side to the left end of the second mounting member 21 on the left side (the left-right length of the mounting section 2) is equal to the left-right length of the base 5. A first portion of the resin material T is disposed in the space S formed by the two opposing inclined surfaces 212, and a second portion of the resin material T is disposed protruding from the front end surface (front surface) 213 of the mounting member 21 (mounting section 2) (see FIG. 4). The resin material T is placed on the mounting section 2 with parts of its side surfaces in contact with the inclined surfaces 212 of the left and right mounting members 21 (see FIG. 2).

[0022] 5A and 5B are cross-sectional views illustrating the protruding member 24 provided on the mounting part 2 of the cutting instrument 1. A storage hole 23 for storing (the tip 24c of) the protruding member 24 is formed in the front end face 213 of the mounting member 21. The storage hole 23 extends rearward from the front end face 213 and extends upward partway without reaching the rear end face 214, connecting to the upper face 215 of the mounting member 21. The storage hole 23 is formed in the first mounting member 21 on the right side to which the rotation shaft 43 of the cutting member 4 is attached. The protruding member 24 is rod-shaped and extends in the front-rear direction. The protruding member 24 is stored in the storage hole 23.

[0023] The protruding member 24 has an inclined portion 24a at its rear end, which is inclined upward and backward. A spring 25 that expands and contracts in the front-to-rear direction is disposed between a rear end surface 24b of the protruding member 24 and the rear wall of the receiving hole 23. The spring 25 applies a forward force to the protruding member 24, and when the spring 25 is extended (see FIG. 5A), the tip 24c of the protruding member 24 protrudes from the front end surface 213 of the mounting member 21. When a force is applied from above to the inclined portion 24a and a rearward force acts on the spring 25, as described below, the tip 24c of the protruding member 24 is accommodated in the receiving hole 23 and the spring 25 contracts (see FIG. 5B). When the backward force acting on the spring 25 is released, the spring 25 extends, and the tip 24c of the protruding member 24 protrudes from the front end surface 213 of the mounting member 21. In this way, the protruding member 24 is movable in the front-rear direction perpendicular to the front end surface 213 of the mounting member 21.

[0024] As described above, both ends of the groove 22 extending in the front-rear direction are open. A rod-shaped slide member 26 is disposed in the groove 22. The left-right length of the slide member 26 is smaller than the distance d (see FIG. 2). The slide member 26 is slidable along the groove 22 on the base 5 (see FIG. 3). The vertical length of the slide member 26 is greater than the depth of the groove 22 and smaller than the vertical length of the mounting member 21. The front-rear length of the slide member 26 is not particularly limited as long as it is equal to or greater than the length at which the rear end face 26b of the slide member 26 is positioned rearward of the reference line 54 on the base 5 when the front end face 26a of the slide member 26 is placed in contact with the rear bottom surface of the resin material T placed on the mounting member 21, as described below. For example, the front-rear length of the slide member 26 is equal to or greater than the length of the groove 22 in the front-rear direction. The resin material T is placed so that its rear surface (bottom surface) contacts the front end surface 26a of the slide member 26 (see FIG. 4).

[0025] A scale is marked on the side of the slide member 26, with the position of the rear end face 26b as zero. As will be described later, by checking the scale on the slide member 26 where the reference line 54 on the base 5 is located, the distance L1 from the rear end 26b of the slide member 26 to the reference line 54 can be determined.

[0026] A slit hole is formed in the bottom surface of groove portion 22 of base 5, following groove portion 22. A screw hole is formed in the underside of slide member 26. Slide member 26 is connected to base 5 using a screw of a size that allows the screw shaft to be inserted into the slit hole but the screw head cannot pass through. That is, the screw shaft is inserted from below into the slit hole and threaded into the screw hole in the underside of slide member 26. Slide member 26 is fixed to base 5 by fastening the screw to slide member 26 so that the screw head of the screw contacts base 5. If the screw is loosened to the extent that the screw head does not contact base 5, slide member 26 becomes slidable along groove portion 22.

[0027] <Pressing member> As described above, the pressing member 3 includes a flat lid portion 31, and the pressing portion 32 is attached to this lid portion 31 so as to be vertically movable. The lid portion 31 is placed on the upper surfaces 215 of the two mounting members 21. In a plan view, the lid portion 31 is large enough to cover the entire upper surfaces 215 of the two mounting members 21 and the space S. The lid portion 31 is placed above the two inclined surfaces 212, and closes off the upper side of the space S.

[0028] The holding portion 32 is a flat plate-like member sized to be able to be placed within the space S. A screw shaft 33 extending in the vertical direction is fixed to the holding portion 32. A screw hole 34 extending in the vertical direction is formed in the lid portion 31. The holding portion 32 is attached to the lid portion 31 by threading the screw shaft 33 into the screw hole 34. A tool hole is formed in the head of the screw shaft 33, and the screw shaft 33 can be moved up and down by inserting a tool into the tool hole and turning the inserted tool. This causes the holding portion 32 to move up and down.

[0029] The pressing member 3 has a through-hole 35 that penetrates vertically in a portion corresponding to the accommodation hole 23 formed in the upper surface 215 of the first mounting member 21 on the right side. A rod-shaped pushing portion 36 is inserted into the through-hole 35 (see FIG. 5A). The through-hole 35 is composed of a first portion 35a located at the bottom and having a smaller diameter, and a second portion 35b located at the top and having a larger diameter. The pushing portion 36 has a lower first portion 36a whose diameter is smaller than that of the first portion 35a, and an upper second portion 36b whose diameter is larger than that of the first portion 35a. The lower end of the first portion 36a is a tapered pointed portion 36c, and the inclined surface of the pointed portion 36c is positioned so as to be able to contact the inclined portion 24a of the protruding member 24.

[0030] The first portion 36a of the pushing portion 36 is disposed inside a spring 37 that expands and contracts in the vertical direction. The spring 37 can expand and contract between the lower end surface of the second portion 35b of the through-hole 35 and the lower end surface of the second portion 36b of the pushing portion 36. As shown in FIG. 5B , when the pushing portion 36 is pressed and the first portion 36a is pushed into the through-hole 35, the tip portion 36c of the pushing portion 36 comes into contact with the inclined portion 24a of the protruding member 24 and applies a rearward force to the protruding member 24. This force causes the protruding member 24 to move rearward, contracting the spring 25. As a result, the tip 24c of the protruding member 24 moves rearward from the end surface 213 of the first right-side mounting member 21, and the protruding member 24 is entirely housed within the first right-side mounting member 21.

[0031] The presser member 3 has a handle 38 on its upper surface. A user can hold the handle 38 to place the presser member 3 on the mounting section 2 or remove it from the mounting section 2. Furthermore, as shown in the schematic plan view of the cutting instrument 1 in FIG. 6 , in this embodiment, the presser portion 32, the screw shaft 33, and the screw hole 34 are provided in two locations, which are point-symmetrical with respect to the center O of the presser member 3 in a plan view. Furthermore, the through-hole 35, the pushing portion 36, and the spring 37 are provided in two locations, which are point-symmetrical with respect to the center O of the presser member 3 in a plan view. With this configuration, the presser member 3 can be placed on the mounting section 2 without considering the left-right or front-rear directions of the presser member 3.

[0032] <Cutting material> As described above, the cutting member 4 includes a rectangular pillar-shaped arm 41, and the arm 41 is equipped with a blade 42 for cutting the resin material T. A rotation shaft 43 is provided at one end of the arm 41, and a grip 44 is attached to the other end. A user can hold the grip 44 and rotate the cutting member 4 around the rotation shaft 43.

[0033] The length of the arm 41 (the length of the arm 41 in the left-right direction in FIG. 7) is approximately equal to the left-right lengths of the mounting portion 2 and the base portion 5. The blade portion 42 is fixed to an opposing surface 41a of the arm 41 (the rear surface of the arm 41 in FIG. 3 etc.) that faces the end surface 213 of the mounting portion 2 by a fixing device (for example, a bolt) 45 (see FIG. 2), and when the blade portion 42 becomes worn, the blade portion 42 can be replaced.

[0034] The blade portion 42 is attached so that the cutting edge 42a is located in a recess 41b provided in the center of the arm 41 in the extension direction. The cutting edge 42a is linear or approximately linear and is attached at an inclination so that the cutting edge 42a protrudes downward from the upper end of the recess 41b and becomes longer as it becomes farther from the rotation shaft 43. That is, as shown in FIG. 7, when the arm 41 is placed horizontally, the blade portion 42a is attached at an inclination with respect to the horizontal direction in which the arm extends (the left-right direction in FIG. 7) so that the side farther from the rotation shaft 43 (the left side in FIG. 7) is positioned lower. The inclination of the cutting edge 42a is desirably set so that when the cutting edge 42a of the blade portion 42 comes into contact with the resin material T with the largest diameter, which requires the greatest force for cutting, the cutting edge 42a of the blade portion 42 is perpendicular to the vertical direction and a force is applied in the vertical direction.

[0035] The blade portion 42 is attached so that, when rotated counterclockwise as viewed from the front, its cutting edge 42a passes near the end surface 213 of the mounting portion 2 (i.e., passes along the edge of the end surface 213). As shown in FIG. 2, the trajectory K of the cutting edge 42a of the blade portion 42 when the arm 41 is rotated includes the groove portion 22 of the mounting portion 2 and the space S above it, and the cutting edge 42a passes through the boundary between the first portion and the second portion of the resin material T placed on the mounting portion 2.

[0036] As shown in Figures 5A and 5B, a recess 46 recessed forward is formed on the rear opposing surface 41a (the rear surface of the arm) of the arm 41. When the arm 41 is lowered and placed in contact with the base 5, this recess 46 communicates with the through-hole 23, and the recess 46 can accommodate the tip 24c of the protruding member 24 (Figure 5A). When the recess 46 and the through-hole 23 communicate, the tip 24c of the protruding member 24 protrudes from the end surface 213 of the first mounting member 21 on the right side, and is accommodated in the recess 46. As a result, the arm 41 is locked in the position where it contacts the base 5, preventing injury from the blade 42.

[0037] <Base> The base 5 is plate-shaped with its front and rear protruding downward, forming a U-shape in side view (see Figure 1). The mounting part 2 is fixed to the top surface 51 of the base 5 approximately in the center in the front-to-back direction, and the lowered arm 41 is placed on the front of the top surface 51 of the base 5. A notch 53 that is open in the vertical direction is formed in the front of the top surface 51 of the base 5 in the center in the left-to-right direction, and the blade part 42 of the arm 41 is configured to be positioned in this notch 53 when the arm 41 is lowered (see Figure 7).

[0038] As shown in FIG. 3, a reference line 54 is marked on the rear side of the upper surface 51 of the base 5. The reference line 54 is used as a reference for determining the length of the resin material T to be cut. The reference line 54 is marked at a position where the rear end surface 26b of the rod-shaped slide member 26 will be located when the slide member 26 is placed so that the front end surface 26a of the slide member 26 is flush with the front end surface 213 of the mounting unit 2. When the side surface of the resin material T is placed on the mounting unit 2 and the front end surface 26a of the slide member 26 is brought into contact with the rear bottom surface of the placed resin material T, the distance L2 from the front end surface 26a of the slide member 26 to the end surface 213 of the mounting unit 2 is equal to the distance L1 from the reference line 54 to the rear end surface 26b of the slide member 26 (in FIG. 4, L1 = L2). In this embodiment, the length of slide member 26 in the front-rear direction is set to be longer than the length of groove portion 22 in the front-rear direction, but reference line 54 may overlap rear end face 214 of mounting member 21 of mounting unit 2, in which case the length of slide member 26 in the front-rear direction is equal to the length of groove portion 22 in the front-rear direction. Furthermore, when reference line 54 is set on rear end face 214 of mounting member 21 of mounting unit 2, the position of rear end face 214 of mounting member 21 of mounting unit 2 can be used in place of reference line 54.

[0039] A pair of rails 55 extending in the front-rear direction are provided on the underside of the base 51. A flange portion 64 of the storage unit 6 (described later) is disposed on the upper surface of the rails 55, allowing the storage unit 6 to slide in the front-rear direction.

[0040] A magnet 56 is attached to the front surface 52, which is bent downward at the front side of the base 5. Since the storage section 6 is made of a ferromagnetic metal, the wall section 61 of the storage section 6 is attached to the magnet 56 and fixed thereto.

[0041] A handle 57 for easy carrying is fixed to the base 5. In this embodiment, the handle 57 is provided at the right end of the cutting instrument 1, but the position is not limited to this and it is acceptable as long as the handle is provided in a position that allows easy carrying.

[0042] Four legs 7 are fixed to the four corners of the underside of the base 5. The ends of the legs 7 are preferably made of a rubber material to prevent movement of the cutting tool 1 and to absorb shocks during cutting. By making the ends of the legs 7 out of a rubber material, the entire cutting tool 1 is prevented from moving during use, allowing the resin material T to be cut stably.

[0043] <Containment Unit> As described above, the storage unit 6 is a hollow, rectangular box with an open top, and stores the second portion of the resin material T cut by the cutting member 4. The front wall 61 protrudes upward from the opening and is disposed opposite the front end surface 213 of the mounting member 21 of the mounting unit 2. A left wall 62 protrudes rearward from the left edge of the front wall 61, and a right wall 63 protrudes rearward from the right edge of the front wall 61. Plate-shaped flanges 64 protrude on the left and right sides from the upper edges of the left wall 62 and right wall 63, respectively. The storage unit 6 can be moved below the base 5 by placing these flanges 64 on a pair of rails 55 of the base 5 and sliding them.

[0044] When the storage section 6 is located below the base 5, the upper end of the front wall 61 of the storage section 6 is located at a position higher than the upper end of the groove section 22. In this configuration, even if the second portion of the resin material T flies forward when the resin material T is cut, the second portion of the resin material T hits the front wall 61 and falls into the storage section 6, so that the second portion of the resin material T can be reliably contained. Note that the height of the upper end of the front wall 61 of the storage section 6 may be equal to or lower than the height of the upper end of the base 5.

[0045] A handle 65 is provided on the front wall 61, and a user can hold the handle 65 to move the storage unit 6 in the front-to-rear direction. A sloped portion whose upper surface slopes downward from the front to the rear may be formed on the lower side of the storage unit 6. This sloped surface allows the resin material T in the storage unit 6 to move rearward, making it possible to store the resin material T evenly within the storage unit 6.

[0046] The procedure for cutting the resin material T with the cutting tool 1 so that the length becomes L to Lx will be described below. <Disconnection procedure> In the cutting instrument 1, the arm 41 is placed on the base 5 and locked as shown in FIG. 7, and the storage section 6 is located below the base 5. First, the user presses the pushing section 36 of the pressing member 3 downward. The pressed pushing section 36 contracts the spring 37, and the pushing section 36 moves downward with its tip 36c in contact with the inclined section 24a of the protruding member 24. This causes the protruding member 24 to move rearward and the spring 25 to contract. As a result, the tip 24c of the protruding member 24 is housed within the mounting member 21, and the arm 41 is unlocked.

[0047] In this state, the user holds the grip portion 44 and rotates the arm 41 counterclockwise as viewed from the front. After moving the arm 41 above the accommodation hole 23 of the mounting member 21, the user stops pressing the pusher portion 36. The spring 37 of the pusher portion 36 expands, causing the pusher portion 36 to move upward. As a result of the force that had been moving the protruding member 24 rearward being released, the spring 25 expands, causing the protruding member 24 to move forward, and the tip 24c of the protruding member 24 protrudes from the end surface 213 of the mounting member 21. In this state, the arm 41 is moved counterclockwise to lower it, and the arm 41 is stopped and locked at the tip 24c of the protruding member 24 protruding from the end surface 213. This prevents the arm 41 from moving counterclockwise on its own, preventing the arm 41 from descending and injury from the blade portion 42.

[0048] Next, the user uses the handle 38 to remove the pressing member 3 from the mounting portion 2. Then, the user moves the slide member 26 placed in the groove 22 back and forth along the groove 22 to set the distance L1 from the rear end surface 26b of the slide member 26 to the reference line 54 to a length Lx, and then raises the screw shaft of the slide member 26 to secure the slide member 26 to the base 5. Note that the movement and securing of the slide member 26 may be performed at the beginning of the cutting procedure. The rear surface (bottom surface) of the resin material T is brought into contact with the front end surface 26a of the slide member 26, and the side surfaces of the resin material T are brought into contact with the inclined surfaces 212 of the two mounting members 21, and the resin material T is placed on the mounting portion 2. As a result, the resin material T is positioned so that it protrudes from the front end surfaces 213 of the mounting members 21. The protruding length is expressed as L-Lx.

[0049] Thereafter, the user holds the handle 38 and places the pressing member 3 on the placement unit 2. The user uses a tool to turn the screw shaft 33 to move the pressing unit 32 up and down, and adjust the height of the pressing unit 32 so that the bottom surface of the pressing unit 32 presses down on the upper end portion of the side surface of the resin material T. As a result, the resin material T is fixed and firmly held by the two inclined surfaces 212 and the pressing unit 32.

[0050] After the resin material T is fixed by the two inclined surfaces 212 and the presser portion 32, the user holds the grip portion 44, rotates the arm 41 slightly upward clockwise, and then presses the pushing portion 36 of the presser member 3 downward. As a result, in the same manner as described above, the tip 24c of the protruding member 24 is housed within the mounting member 21, and the leftward rotational movement of the arm 41 is unlocked.

[0051] While keeping the pushing portion 36 of the presser member 3 pressed downward, the user rotates the arm 41 counterclockwise from above to below using the grip portion 44, and swings the arm 41 down until it contacts the base 5. At this time, it is desirable to press the entire presser member 3 downward from above to fix the pressing portion 32 so that it does not move. When the arm 41 rotates and moves in this manner, the blade portion 42 passes the edge of the end surface 213 of the mounting portion 2, and as a result, the portion of the resin material T that protrudes from the end surface 213 of the mounting portion 2 (second portion) is cut by the blade portion 42.

[0052] The cut resin material T (second portion of the resin material T) is stored in the storage section 6 provided below the mounting section 2. Since the front wall 61 of the storage section 6 protrudes above the opening that stores the cut resin material T, even if the second portion of the resin material T flies forward during cutting, the second portion of the resin material T hits the front wall 61 and falls into the storage section 6, so that the second portion of the resin material T can be reliably stored in the storage section 6. In addition, cutting chips produced during cutting are also stored in the storage section 6, which is located below the base 5, which is the cutting position.

[0053] The user rotates the arm 41 counterclockwise until the arm 41 contacts the base 5, and then stops pressing the push-in portion 36 of the pressing member 3. This causes the push-in portion 36 to move upward, the protruding member 24 to move forward, and the tip 24a of the protruding member 24 protrudes from the front end surface 213 of the mounting member 21 and is housed in the recess 46 formed in the arm 41. This locks the arm 41 in contact with the base 5, preventing the arm 41 from moving on its own and causing injury, etc.

[0054] Thereafter, the user holds the handle 38 and removes the pressing member 3 from the mounting section 2, and collects the resin material T (first portion of the resin material T) remaining on the mounting section 2. The length of this resin material T is Lx.

[0055] According to the cutting instrument 1 of this embodiment, the resin material T placed on the mounting portion 2 is pressed and fixed by the pressing member 3, so that the resin material T can be firmly held and cut.

[0056] Hereinafter, an embodiment different from the embodiment described above will be described. Note that the same terms and symbols will be used to describe the same components as those in the embodiment described above for ease of understanding.

[0057] <1> In the above-described embodiment, the resin material T is cylindrical, but it may be in the form of a pillar or polygonal pillar.

[0058] <2> In the above-described embodiment, the resin material T is arranged so that the length of the first portion of the resin material T placed on the placing portion 2 is the desired length Lx, but the resin material T may also be arranged so that the second portion of the resin material T extending from the placing portion 2 has the desired length Lx. In this case, the slide member 26 and the resin material T may be arranged so that the distance L1 from the rear end surface 26b of the slide member 26 placed in the groove portion 22 to the reference line 54 is (L-Lx).

[0059] <3> In the above-described embodiment, the pressing member 3 has the pressing portion 32 attached to the lid portion 31 via the screw shaft 33 so as to be vertically movable. However, the pressing member 3 is not limited to a configuration using the screw shaft 33 as long as it is configured to be able to press down the resin material T placed on the placement portion 2 from above. For example, the pressing portion 32 may be configured to hang down from the lid portion 31 via a spring.

[0060] <4> In the above-described embodiment, a force is applied to the cutting member 4 to rotate it. If the cutting member 4 is sufficiently heavy, the resin material T can be cut by the weight of the cutting member 4 and the free fall caused by that weight. In other words, to enable cutting by rotation of the cutting member 4 utilizing the weight of the cutting member 4 itself, rather than by manual rotation of the cutting member 4 by the user, the weight of the cutting member 4 should be taken into consideration when designing.

[0061] <5> In the above-described embodiment, the cutting edge 42a of the blade portion 42 is linear or substantially linear and is inclined so that the cutting edge 42a protrudes downward from the upper end of the recess 41b as it extends further from the rotation shaft 43. However, the cutting edge 42a of the blade portion 42 is not limited to a linear shape as long as it is configured to be perpendicular to the vertical direction of the resin material T to be cut and to apply force in the vertical direction. For example, the cutting edge 42a may be curved to match the side shape of the resin material T to be cut. For example, if the resin material T is cylindrical, the cutting edge 42a of the blade portion 42 is preferably curved and concave upward when the cutting member 4 is placed horizontally with the cutting edge 42a of the blade portion 42 facing downward. For resin materials T of various diameters, it is preferable to set the curved shape and / or inclination angle of the cutting edge 42a of the blade portion 42 so that the cutting edge 42a of the blade portion 42 is perpendicular to the vertical direction and applies force in the vertical direction.

[0062] <6> In the above-described embodiment, the slide member 26 slides on the upper surface of the base 5. In order to position the slide member 26 more stably and smoothly, the base 5 may be provided with a recess that is recessed downward and extends in the front-to-rear direction.

[0063] <7> In the above-described embodiment, the scale is provided on the slide member 26. However, the scale may be provided anywhere as long as the distance L1 of the portion of the resin material T placed on the mounting portion 2 that protrudes rearward from the reference line 54 can be determined; for example, the scale may be provided on the base 5.

[0064] <8> In the embodiment described above, the reference line 54 is provided at a position where the rear end surface 26b of the rod-shaped slide member 26 would be located when the slide member 26 is positioned so that the front end surface 26a of the slide member 26 is flush with the front end surface 213 of the mount 2, and a scale is provided on the side surface of the slide member 26 with the rear end 26b set as zero. However, the position and scale of the reference line 54 are not limited to those of the embodiment described above. It is sufficient that the distance L2 from the front end surface 26a of the slide member 26 to the end surface 213 of the mount 2 is equal to the distance L1 from the reference line 54 to the rear end surface 26b of the slide member 26, and that the distance L1 is different. For example, the reference line 54 may be provided at a position where the rear end surface 26b of the slide member 26 would be located when the front end surface 26a of the slide member 26 is 5 mm rearward of the front end surface 213 of the mount 2, and the scale on the slide member 26 may be provided with the rear end 26b set as 5 mm.

[0065] <9> In the above-described embodiment, the protruding member 24 and the pushing portion 36 are substantially cylindrical, but they may be rod-shaped, for example, rectangular. In the above-described embodiment, the receiving hole 23 and the through-hole 35 into which the protruding member 24 and the pushing portion 36 are inserted are circular in plan view, but are not particularly limited to such shapes as long as they can accommodate the protruding member 24 and the pushing portion 36.

[0066] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the present invention.

[0067] <Additional Notes> The cutting instrument 1 according to the first aspect of the present disclosure comprises: A cutting tool 1 for cutting a columnar resin material T, a placement portion 2 on which a first portion of the resin material T is placed; a pressing member 3 that presses at least a part of the first portion of the resin material T placed on the placement portion 2; a cutting member 4 for cutting a second portion of the resin material T protruding from the mounting portion 2; Equipped with. According to the cutting instrument 1 of the first aspect of the present disclosure, the resin material T is pressed and fixed by the pressing member 3, so that the resin material T can be cut while being firmly held.

[0068] In the second aspect of the cutting instrument 1 according to the first aspect, The mounting portion 2 has a groove portion 22 and two inclined surfaces 212 that are inclined upward from two edges of the groove portion 22 and away from each other. According to the cutting instrument 1 of the second aspect of the present disclosure, the resin material T is fixed between the two inclined surfaces 212 and the pressing member 3, so that the resin material T can be firmly held and cut.

[0069] In the cutting device 1 of the third aspect according to the second aspect, The pressing member 3 is a lid portion 31 that closes the gap between the upper ends of the two inclined surfaces 212; and a pressing portion 32 that presses down at least a part of the first portion of the resin material T placed in contact with the two inclined surfaces. According to the cutting instrument 1 having the third side surface following the second side surface, the pressing member 3 closes the space between the upper ends of the two inclined surfaces 212, and the pressing portion 32 fixes the resin material T, so that the resin material T can be stably held on the mounting portion 2.

[0070] In a fourth aspect of the cutting instrument 1 according to the third aspect, The pressing portion 32 has a screw shaft 33 that protrudes toward the lid portion 31, The cover portion 31 has a screw hole 34 into which the screw shaft 33 is screwed. According to the cutting instrument 1 of the fourth aspect according to the third aspect, the retaining portion 32 can be moved up and down by threading the screw shaft 33 into the screw hole 34 of the lid portion 31. As a result, columnar resin materials T having various diameters can be firmly fixed and held by the retaining portion 32.

[0071] A cutting instrument 1 according to any one of the second to fourth aspects of the fifth aspect, a slide member 26 that is slidable along the direction in which the groove portion 22 extends; The slide member 26 is placed in contact with the first portion of the resin material T. According to the cutting instrument 1 of the fifth aspect, which follows any of the second to fourth aspects, one of the bottom surfaces of the resin material T can be further fixed, and the resin material T can be more firmly fixed and held.

[0072] A cutting instrument 1 according to any one of the first to fifth aspects of the sixth aspect, The cutting member 4 is columnar, one end of which is attached to the end surface 213 of the mounting unit 2 via a rotation shaft 43, and is rotatable around the rotation shaft 43 along the end surface 213; The cutting member 4 is provided with a blade portion 42 on an opposing surface 41 a side facing the end surface 213 . According to the cutting instrument 1 having a sixth side that follows any of the first to fifth sides, the blade portion 42 passes along the edge of the end face 213 of the mounting portion 2, so that the boundary portion between the first and second portions of the resin material T can be cut off, and the entire second portion of the resin material T that protrudes from the mounting portion 2 can be cut off.

[0073] In the seventh aspect of the cutting instrument 1 according to the sixth aspect, When the cutting member 4 is placed horizontally with the cutting edge 42a of the blade portion 42 facing downward, the cutting edge 42a of the blade portion 42 is inclined relative to the horizontal direction so that it is positioned further downward as it moves away from the rotation axis 43, or is curved and concave upward. According to the cutting instrument 1 of the seventh aspect in accordance with the sixth aspect, the inclination rate of the cutting edge 42a can be set so that when the cutting edge 42a of the blade 42 comes into contact with the resin material T with the largest diameter, which requires the greatest force for cutting, the cutting edge 42a of the blade 42 is perpendicular to the vertical direction and a force is applied in the vertical direction. By setting it in this manner, it is possible to further reduce the difference between the direction in which the weight of the arm 41 is applied (vertical direction) and the direction of the force when cutting of the resin material T begins, and it becomes possible to cut the resin material T more efficiently.

[0074] In the cutting instrument 1 of the eighth aspect according to the sixth or seventh aspect, The mounting portion 2 includes a protruding member 24 that protrudes from the end surface 213 and is movable in a direction perpendicular to the end surface 213 . According to the cutting instrument 1 of the eighth aspect according to the sixth or seventh aspect, the cutting member 4 can be fixed from above to the part of the protruding member 24 that protrudes from the end face 213, thereby locking the cutting member 4 so that it does not rotate. As a result, the cutting member 4 does not rotate on its own, and the cutting instrument 1 can be used safely.

[0075] In the cutting instrument 1 of the ninth aspect according to the eighth aspect, The cutting member 4 has a recess 46 on the opposing surface 41 a that accommodates the portion of the protruding member 24 that protrudes from the end surface 213 . According to the cutting instrument 1 of the ninth aspect in accordance with the eighth aspect, the cutting member 4 can be locked to the mounting part 2 to prevent it from moving. As a result, the cutting member 4 will not move on its own, and the cutting instrument 1 can be used safely.

[0076] A cutting instrument 1 according to any one of the first to ninth aspects of the tenth aspect, A box body 6 having one side open is provided, The second portion of the resin material T cut by the cutting member 4 falls into the box body 6 through the opening. According to the cutting tool 1 of the tenth aspect according to any one of the first to ninth aspects, the cut resin material T can be collected in the box 6.

[0077] In the cutting instrument 1 of the eleventh aspect according to the tenth aspect, One side wall 61 of the box body 6 protrudes upward from the opening and faces the end surface 213 of the inclined surface 212 . According to the cutting tool 1 having the 11th side surface in accordance with the 10th side surface, the side wall 61 of the box body 6 protrudes above the opening that accommodates the cut resin material T, so that the cut resin material T can be securely accommodated within the box body 6 even if it bounces around due to the force of falling. [Industrial Applicability]

[0078] The present invention can be used to cut a columnar resin material. [Explanation of symbols]

[0079] 1 cutting instrument 2. Placement area 212 Slope 213 End face 22 Groove 24 Protruding member 26 Slide member 3. Retaining member 31 Lid 32 Presser foot 33 Screw shaft 34 screw holes 4 Cutting material 41a Opposite side 42 Blade part 42a cutting edge 46 Recess 6. Storage section (box) T Resin material

Claims

1. A cutting tool for cutting a columnar resin material, a placement portion on which the first portion of the resin material is placed; a pressing member that presses at least a part of the first portion of the resin material placed on the placement portion; a cutting member that cuts a second portion of the resin material protruding from the mounting portion; Equipped with the mounting portion has a groove and two inclined surfaces inclined upward from two edges of the groove so as to move away from each other, The pressing member is a cover portion that closes the gap between the upper ends of the two inclined surfaces; a pressing portion that presses at least a part of the first portion of the resin material placed in contact with the two inclined surfaces.

2. The pressing portion has a screw shaft that protrudes toward the lid portion, The cutting instrument according to claim 1 , wherein the cover portion has a threaded hole into which the screw shaft is threaded.

3. a slide member that is slidable along the direction in which the groove portion extends, The slide member is placed in contact with the first portion of the resin material.

3. A cutting instrument according to claim 1 or claim 2.

4. the cutting member is columnar, one end of which is attached to the end surface of the placement unit via a rotation shaft, and is rotatable around the rotation shaft along the end surface; 3. The cutting instrument according to claim 1, wherein a blade portion is provided on a surface of the cutting member that faces the end surface.

5. 5. The cutting instrument according to claim 4, wherein when the cutting member is placed horizontally with the cutting edge of the blade portion facing downward, the cutting edge of the blade portion is inclined relative to the horizontal direction so as to be positioned lower the further away from the rotation axis, or is curved and concave upward.

6. The cutting instrument according to claim 4 , further comprising a protruding member that protrudes from the end surface of the mounting portion and is movable in a direction perpendicular to the end surface.

7. The cutting instrument according to claim 6, wherein the cutting member has a recess in the opposing surface that accommodates a portion of the protruding member that protrudes from the end surface.

8. It has a box body with one side open, The cutting tool according to claim 1 or 2, wherein the second portion of the resin material cut by the cutting member falls into the box through the opening.

9. A cutting tool for cutting a columnar resin material, comprising: a placement portion on which the first portion of the resin material is placed; a pressing member that presses at least a part of the first portion of the resin material placed on the placement portion; a cutting member configured to cut a second portion of the resin material protruding from the mounting portion, the mounting portion has a groove and two inclined surfaces inclined upward from two edges of the groove so as to move away from each other, The cutting tool includes a slide member that is slidable along the direction in which the groove portion extends, and the slide member is placed in contact with the first portion of the resin material.

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