JP2015202561A - Cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to operate operation means for a cutter by a user with a light operational feeling.SOLUTION: A cutter has a link mechanism 70. The link mechanism 70 is equipped with a deformable link while keeping a parallelogram which is configured from parts among a first rod-like link member 71A, a second rod-like member 71B, a third rod-like member 71C and a portion of a frame 20 connected to the second link member 71B and he third link member 71C. Rollers 71B1, 71C1, which are protruded towards the frame 20, are mounted near lower ends of the second link member 71B and the third link member 71C. When the frame 20 is lowered, two leverages are formed in the second link member 71B and the third link member 71C.

Description

  The present invention relates to a cutting machine, and more particularly to a manual cutting machine. Hereinafter, unless otherwise specified, the cutting machine referred to in the present application means a manual cutting machine.

When it is necessary to cut a large number of stacked objects such as paper and resin films, a cutting machine is used to cut accurately and in a short time.
The most widely used cutting machine is one in which one end of a long blade is hinged to the edge of the table, and the blade is rotated with respect to the table with a handle provided at the other end of the blade. It is a type of cutting machine that cuts an object placed on a table by moving it. Although there is no general name for this type of cutting machine, this type of cutting machine will be referred to as a rotating guillotine cutter in this specification.
After that, the object placed on the table is guided by a cutting machine of a type that cuts with a blade that descends while maintaining substantially parallel to the table, or a linear guide member and a guide member on the table. However, it is equipped with a blade perpendicular to the table that can move linearly while rotating, and cuts the object placed on the table by reciprocating while rotating the blade along the guide member A cutting machine has also been proposed and put into practical use. These types of cutters also have no general name, but in this specification the former of these types of cutters will be referred to as parallel guillotine cutters and the latter of these types of cutters will be referred to as slide cutters. I will do it.

The rotating guillotine cutter has a thick and heavy blade. The thickness may exceed 5 mm, and the object is cut by pushing the object at a time by the weight of the blade itself and the large force applied to the blade.
The same applies to the parallel guillotine cutter. Since the parallel guillotine cutter is a cutting machine developed with the flow from the rotating guillotine cutter, using a thick and heavy blade according to the rotating guillotine cutter, the object is once pulled by the weight of the blade itself and the large force applied to the blade. The object is cut by pushing it down.
On the other hand, the slide cutter reciprocates the rotating blade on the object, and cuts the object as if cutting the paper with a cutter knife by the moving blade. In order to perform cutting based on such a cutting principle, the blade provided in the slide cutter is thin, for example, about 1 mm or less.

Both the rotary guillotine cutter type cutter and the parallel guillotine cutter type cutter require a large force from the user to move the blade when cutting. However, a parallel guillotine cutter type cutting machine can easily add a configuration to amplify the force applied by the user, such as the lever principle, to a part of the mechanism for moving the blade. It is also possible to reduce the force required of the user when moving it to some extent.
On the other hand, a slide cutter type cutting machine requires a small amount of force from the user, but the number of sheets of paper or the like that can be cut by a single movement of the blade is small (in general products, there are several sheets). When the number of sheets of paper contained in the object is large, all the objects cannot be cut unless the blade is reciprocated many times.

In view of the above points, the present inventor has further developed a parallel guillotine cutter type cutting machine, and does not require an excessively large force to move the blade to the user, so that the number of sheets of paper included therein However, I thought that I could get a cutting machine that could cut a large object at a time.
In particular, the application of the lever principle described above is worth improving.

  This invention makes it the subject to provide the cutting machine which can cut | disconnect the object with a certain large number of sheets etc. at once, without request | requiring an excessively large force in order to move a blade to a user.

The present invention relates to a blade for cutting the object by pressing against the surface of the object to be cut while keeping the blade edge in a substantially parallel state, and the blade separated from the object. A cutting machine having operation means that a user moves to move toward an object and link means that transmits a force applied to the operation means to the blade.
The link means in the cutting machine includes a frame for fixing the blade attached to the upper side of the blade, and a lower end thereof connected to the frame so as to be rotatable, respectively. A two-link member, a third link member, and a first link member in the form of a rod that is pivotally connected to the respective upper ends of the second link member and the third link member; It is equipped with.
Further, the first link member, the second link member, the third link member, a portion of the frame connected to the second link member, and a portion connected to the third link member. The space between the first link member and the second link member is maintained at an acute angle while forming a link that can be deformed while maintaining a parallelogram shape as a whole. Below the second link member, there is provided a second contact body that contacts the upper side of the frame when the second link member falls, and below the third link member, A third contact body that contacts the upper side of the frame when the third link member falls, and a portion where the first link member and the second link member are connected; Downward with the operating means In Succoth, adapted to be deformed so as to collapse the link downward.
In such a cutting machine, the blade is moved downward toward the object by the operation of the operating means (for example, it is a lever configured in a bar shape). Although the force required to cause the user to perform such an operation is large, the present invention reduces the force required by the user at that time for the following reason.
The present invention includes link means. The link means includes a frame for fixing the blade attached to the upper side of the blade, a second link member having a lower end connected to the frame so as to be rotatable, and a third link member, and a third link. A member, a first link member in the form of a rod, each of which is rotatably connected to each upper end of each of the second link member and the third link member.
A deformable quadrangular link between the first link member, the second link member, the third link member, and a portion of the frame connected to the second link member and the third link member. Is supposed to form. Such a link is a so-called parallelogram link. In the present invention, this link can be deformed while maintaining the parallelogram shape while keeping the angle formed by the first link member and the second link member at an acute angle. The operating means pushes down the portion where the first link member and the second link member are connected downward, causing the second link member and the third link member to fall down, whereby the link becomes a parallelogram. By being crushed downward while maintaining the shape, the blade attached to the frame constituting the lower end of the link moves downward.
By the way, below the second link member and the third link member constituting the link in the cutting machine of the present invention, respectively, a second contact body that contacts the upper side of the frame when the second link member falls, A third abutting body that abuts on the upper side of the frame when the three link member falls is provided. In the second link member, when the lever principle is considered, the connection portion between the first link member and the second link member is a power point, the connection portion between the second link member and the frame is a fulcrum, The contact portion between the contact body and the frame is the point of action. Therefore, the force by which the user pushed down the connecting portion between the first link member and the second link member using the operating means is amplified by the lever and pushes the frame downward. On the other hand, in the third link member, when the lever principle is considered, the connection portion between the first link member and the third link member is a power point, the connection portion between the third link member and the frame is a fulcrum, The contact portion between the contact body and the frame is the point of action. Therefore, also in this case, the force by which the user pushed down the connecting portion between the first link member and the second link member using the operating means is the first link member and the third link via the first link member. After being transmitted to the connecting portion of the member, it is amplified by the above-mentioned lever and the frame is pushed downward.
Even if there is only one lever, it is not necessary for the user to push the frame downward. However, in the present invention, as described above, by applying two levers simultaneously using a link, An object having a certain amount of paper or the like contained therein can be cut at a time without requiring an excessively large force to move the blade.

The 2nd contact body and the 3rd contact body will not ask | require the specific structure, if the above-mentioned lever is materialized.
For example, the second contact body is attached to the second link member so as to be rotatable around the second axis via the second shaft, and a side surface of the second contact body can contact the upper side of the frame. The third contact body is attached to the third link member so as to be rotatable around the third axis via the third axis, and a side surface of the third contact body is set to the upper side of the frame. It may be a circular roller that can be contacted.
As described above, the second contact body and the third contact body are in contact with the upper side of the frame to push the frame downward, but at that time, the frame is shifted laterally. The frictional resistance generated at that time may increase the force required for the user when the user operates the operating means. However, by making the second contact body and the third contact body roller, The fear can be resolved.

The cutting machine of this application may be provided with the elastic body which gives the force which moves the said blade upward with respect to the said blade lowered | lowered with the force from the said operation means.
After cutting an object with a cutting machine, it is necessary to pull up the blade or frame before cutting the next object. If there is an elastic body as described above, there is no need to force the user to perform the work.
The elastic body may be configured to apply a force that pulls the frame upward. By pulling the frame upward, the broken link is restored to its original shape.
The cutting machine of this application may be provided with the control means which controls the moving direction of the left-right direction when the said frame moves up and down. If such a restricting means exists, the trajectory traced when the frame moves up and down can be made desired. As a result, the object can be cut at a predetermined position, and the cutting angle does not change, so that the force required to move the blade required by the user when performing cutting is excessive. You can prevent it from growing.

It is a perspective view which shows the structure of the cutting machine of embodiment of this invention. It is a perspective view which shows the state which folded the table of the cutting machine shown in FIG. It is sectional drawing for demonstrating the structure of the blade body of the cutting machine shown in FIG. It is a top view which shows the table and guide member of the cutting machine shown in FIG. It is a perspective view which shows the state which locked the arm of the cutting machine shown in FIG. It is a figure which shows the link mechanism of the cutting machine shown in FIG. It is a figure which shows notionally the motion of the blade in a cutting machine. (A) The rear view of the blade in the cutting machine shown in FIG. 1, (b) The side view, (c) The side view of the other example of a blade, (d) The side view of the other example of a blade.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of a cutting machine 100 according to this embodiment.
The cutting machine 100 includes a table 2 on which an object to be cut, such as paper or a resin film, is disposed, and a main body case 3 provided on one end side of the table 2.
In the main body case 3, a link mechanism, which will be described later, a blade body 4 including a blade, which will be described later, and a light beam indicating a cutting line that is a line on which the object is actually cut when the blade is lowered are targeted. A light emitting device 6 for projecting onto an object is incorporated. Although not restricted to this, the light-emitting device 6 is comprised including LED, the slit which makes the light emitted from LED linear, the lens etc. which image-forms the light emitted from the slit on a target object, etc. . The user can easily and accurately cut the object while looking at the light beam produced by the light emitting device 6.
The main body case 3 also includes an arm 5 used for a user to perform an operation for moving the blade body 4 up and down, a switch 7 for turning on and off the light emitting device 6, and the arm 5. A lock member 8 that locks the arm 5 in the state of being housed in the case 3 and a guide member 9 that can be slid from the other end of the table 2 are attached.
The base end of the arm 5 is inserted into the main body case 3.

As shown in FIG. 2, the table 2 can be stored in a table storage portion 12 formed by recessing the outer surface of the main body case 3 into a shape corresponding to the shape of the table 2.
For the purpose of ensuring the storage, convex portions 11 are provided on both side surfaces of the table 2, and concave portions are formed on both side surfaces of the table storage portion 12 of the body case 3 at positions corresponding to the convex portions 11. 13 is provided. When the table 2 is stored in the table storage unit 12, the table 11 is temporarily fixed to the main body case 3 by fitting the projection 11 into the recess 13.

The state in which the table 2 shown in FIG. 2 is housed in the main body case 3 is usually a state before and after using the cutting machine 100.
When use of the cutting machine 100 is finished, the switch 7 is operated to turn off the light emitting device 6 to turn off the light indicating the cutting line, and then the table 2 is folded and stored in the main body case 3.
Although the conventional cutting machine 100 occupies a large storage space even after use, the cutting machine 100 according to this embodiment changes the table 2 occupying a large installation area from horizontal to vertical. It can be stored very compactly by folding it.
Further, when the table 2 is housed in the main body case 3, the table 2 covers the introduction opening 10 provided in the main body case 3. The introduction opening 10 is an opening for inserting an object to be cut into the main body case 3 (in short, below the blade described later). By covering the introduction opening 10 with the table 2 when the cutting machine 100 is not used, the cutting machine 100 can reduce the possibility of an accident due to a child inserting a finger through the introduction opening 10. The safety is extremely high.
Although not shown, the body case 3 has a built-in switch that is turned on / off depending on the posture of the table 2. The switch turns off the light emitting device 6 when the table 2 is stored in the main body case 3. As described above, the light emitting device 6 is basically turned on / off by the switch 7. However, since there is a switch that is linked to the attitude of the table 2, the cutting machine 100 only has to store the table 2 in the main body case 3 even if the switch 7 is forgotten to be turned off when the use is stopped. Since the light emitting device 6 is automatically turned off, it is possible to prevent the light emitting device 6 from continuing to operate even if the switch 7 is forgotten to be operated when the cutting machine 100 is used.

Next, FIG. 3 shows a cross section in the vicinity of the blade body 4.
As described above, the main body case 3 is provided with the introduction opening 10 for inserting an object into the main body case 3. An inclined portion 17 that is inclined toward the introduction opening 10 is provided on the upper surface of the introduction opening 10. The inclined portion 17 has a function of increasing the insertion safety when the object is inserted into the main body case 3 through the introduction opening 10. For example, when the tip of the object is widened, the inclined portion 17 guides the widened tip of the object toward the introduction opening 10, so that the object is introduced into the introduction opening 10 due to the presence of the inclined portion 17. Easy to insert into. The inclined portion 17 also has a function of preventing the object other than the object to be cut such as a finger from entering the main body case 3 from the introduction opening 10. The inclined portion 17 also increases the safety of the cutting machine 100.

A lead-out opening 15 is provided on the surface of the main body case 3 opposite to the introduction opening 10. The lead-out opening 15 is an opening through which the object inserted into the main body case 3 from the introduction opening 10 is led out from the main body case 3. In the cutting machine 100 of this embodiment, the main body case 3 is inserted into the main body case 3 from the introduction opening 10 and the leading end thereof is led out from the leading opening 15 (that is, the leading end side protrudes from the leading opening 15 and the base The object in a state in which the end side protrudes from the introduction opening 10 is cut in the case 3.
For example, a transparent protective cover 16 is provided on the outer wall of the outlet opening 15. This protective cover 16 is hingedly connected to the main body case 3, and when leading out the object, as shown by the arrow, it rotates so as to be pushed up by the tip of the object to open the lead-out opening 15. It is supposed to be. On the other hand, in a state where the object is not positioned in the lead-out opening 15, the protective cover 16 is rotated downward by its own weight to hide the lead-out opening 15 as indicated by an arrow. In this state, since the protective cover 16 cannot be further rotated toward the main body case 3 side, even if an object is to be inserted from the lead-out opening 15, the protective cover 16 does not allow it. As a result, the user can intuitively distinguish between the introduction opening 10 and the outlet opening 15. Further, since anything other than the object cannot be inserted into the main body case 3 from the lead-out opening 15, it is possible to prevent a finger or the like from being accidentally inserted from the lead-out opening 15. This is also a device for improving the safety of the cutting machine 100.

The blade body 4 includes a blade 18, a reinforcing plate 19 bonded to the blade 18, and a frame 20 to which a structure including the blade 18 and the reinforcing plate 19 is fixed by screws 18 </ b> A. The frame 20 is a part on the cutting machine 100 side, and the reinforcing plate 19 and the structure including the blade 18 and the reinforcing plate 19 are detachable parts from the cutting machine 100.
The reinforcing plate 19 is a rectangular plate that is fixed to the upper end of the blade 18 and is integrated with the blade 18 and has the same length as the blade 18. The reinforcing plate 19 has a function of reinforcing the blade 18 and a function of allowing the blade 18 to be firmly fixed to the frame 20.
The frame 20 is a member having a substantially U-shaped cross section opened downward and slightly longer than the blade 18. A structure composed of the blade 18 and the reinforcing plate 19 is fixed to a groove portion having a substantially U-shaped cross section of the frame 20 with its upper surface abutting against the upper surface of the groove portion having a substantially U-shaped cross section. Is done. The frame 20 is provided with a threaded hole that is not shown in the drawing, and the above-described screw 18A is screwed into the threaded hole. When the screw 18A is tightened, the tip of the advanced screw 18A hits the side surface of the reinforcing plate 19 of the structure composed of the blade 18 and the reinforcing plate 19, and the structure has a substantially U-shaped cross section of the frame 20. It is clamped between the side where the screw 18A of the opening exists and the inner surface on the opposite side. Thereby, the structure is fixed to the frame 20. On the other hand, if the screw 18A is loosened, the screw 18A is retracted, and the fixing of the frame 20 and the structure is released.
The reason why the frame 20 and the structure are detachable in this way is to replace the blade 18 (or the structure) which is a consumable item.

FIG. 4 shows a top view of the table 2 and the guide member 9.
The guide member 9 has the same cross-sectional shape as the groove 2A having a rectangular cross section provided on the table 2 with the vertical direction in FIG. 4 as its length direction, and is guided in the groove 2A through the groove 2A. A pair of slider portions 22 that are movable in the vertical direction in FIG. 4 and a stopper portion 21 that rises from the slider portion 22 and that is connected below the slider portion 22 in FIG. 4 are provided. The stopper portion 21 is for bringing the object into contact with the slider portion 22 appropriately positioned with respect to the length direction of the groove 2A. Thereby, the object can be positioned at a position desired by the user. Since the upper surface of the slider portion 22 is flush with the upper surface of the table 2, the slider portion 22 does not interfere with the positioning of the object.
Index marks 14 are provided at appropriate positions on the table 2 and the guide member 9 at positions corresponding to the size of the object to be cut. The index mark 14 is provided according to what is often used as an object (for example, A4 version or B5 version), and by cutting the object together therewith, for example, the object is cut in half. The user can easily and accurately cut an object into an arbitrary size. The user appropriately positions the guide member 9 with respect to the table 2 so that the index marks 14 of the table 2 and the guide member 9 are appropriately matched to the size of the object to be cut by the user, and the stopper By simply bringing the object into contact with the portion 21, it is possible to easily and accurately position the object with respect to the table 2 or with respect to the cutting position.
In the groove 2 </ b> A of the table 2, a magnet 23 is appropriately provided so as to be positioned at a position corresponding to the index mark 14 described above. On the other hand, an iron plate (not shown) that is attracted to each other by a magnet 23 and a magnetic force is built in the slider portion 22 constituting the guide member 9. The magnet 23 is arranged so that the magnet 23 and the plate are attracted only at the portion where the table 2 and the index mark 14 of the guide member 9 meet. As a result, the user can automatically and accurately align the guide member 9 and the index mark 14 of the table 2 by attracting the magnet 23 and the plate only by roughly adjusting the positions of the table 2 and the guide member 9. become.
A protrusion 24 is provided on the outer side surface of the slider portion 22 of the guide member 9. The protrusion 24 is urged in a protruding direction by a spring (not shown) provided in the guide member 9, but retracts into the guide member 9 when an external force is applied. On the other hand, on the outer side surface of the groove 2 </ b> A of the table 2, a recess is provided in which a projection 24 can enter at a position corresponding to the index mark 14. When the user grasps, for example, the stopper portion 21 of the guide member 9 and moves the slider portion 22 of the guide member 9 in the length direction of the groove 2 </ b> A, the user's A click feeling due to the protrusion 24 entering the concave portion in the hand is transmitted. Such a feeling of clicking occurs only when the guide member 9 and the index mark 14 of the table 2 are aligned. The user can use the click feeling as a clue as to whether or not the alignment based on the guide member 9 and the index mark 14 of the table 2 is accurately performed.

FIG. 5 shows a perspective view of the arm 5 housed in the main body case 3 and locked with the lock member 8.
The lock member 8 is composed of, for example, a resin handle portion 30 and an L-shaped metal arm holding portion 31, and is indicated by an arrow on the side surface portion of the open end of the arm storage opening 32 on the upper surface of the main body case 3. As shown in FIG.
When the lock member 8 is rotated so as to cross over the handle portion 30, the handle portion 30 does not rise upward. As a result, the arm 5 housed in the main body case 3 does not jump out of the main body case 3.

FIG. 6 shows a schematic diagram of an example of a link mechanism 70 built in the main body case 3 of the cutting machine of the present application. The link mechanism 70 transmits force from the arm 5 to the frame 20, and the rotation of the arm 5 moved by the user is maintained while the blade tip of the blade 18 is substantially parallel to the object or the upper surface of the table 2. This is converted into vertical movement performed by the blade 18. However, the structure of the link mechanism is not limited to that shown in FIG.
The link mechanism 70 includes a rod-like first link member 71A, a second link member 71B, and a third link member 71C. The lengths of the second link member 71B and the third link member 71C are equal to each other. Further, near the lower ends of the second link member 71B and the third link member 71C, the shafts protruding toward the frame 20 and centered on the shafts fixed to the second link member 71B and the third link member 71C, respectively. Rotating rollers 71B1 and 71C1 are respectively attached.
One end of the first link member 71A and the upper end of the second link member 71B are provided by the first shaft 72A, and the other end of the first link member 71A and the upper end of the third link member 71C are provided by the second shaft 72B. The lower ends of the second link member 71B and the third link member 71C are connected to the frame 20 so as to be rotatable by the third shaft 72C and the fourth shaft 72D, respectively. Yes.
As a result, the first link member 71A, the second link member 71B, the third link member 71C, and a part of the frame 20 (the portion between the third shaft 72C and the fourth shaft 72D of the frame 20) are moved to the first shaft 72A. Thus, a parallelogram-shaped link having the third axis 72C, the second axis 72B, and the fourth axis 72D as apexes is formed. This link can be deformed by moving the first shaft 72A from the upper right to the lower left and lower. That is, the parallelogram-shaped link can be crushed in the lower left direction from the illustrated state, and can rise in the upper right direction. It should be noted that a biasing force that returns the first shaft 72A to the initial position where the first shaft 72A is located to the upper right side to some extent works on this link by a spring (not shown).
The frame 20 is provided with a cylindrical member 73 having a cylindrical shape, although not limited thereto. The cylindrical member 73 locks the guide member 74 and the frame 20. The guide member 74 is fixed to the main body case 3 and includes a guide hole 74A that runs obliquely. The cylindrical member 73 is inserted into the guide hole 74A and can move according to the length direction of the guide hole 74A. Thereby, the moving direction of the frame 20 is regulated so as to be the length direction of the guide hole 74A.
The link mechanism 70 includes a fixing member 75 having one end fixed to the main body case 3 by a predetermined means. An upper end of a pulling spring 76 having a lower end fixed to the cylindrical member 73 is fixed to the fixing member 75. The pulling spring 76 is in a compressed state, so that an upward urging force always acts on the cylindrical member 73 and consequently the frame 20.
When the user rotates the arm 5 downward, the arm 5 pushes the first shaft 72A downward, so that the link having the parallelogram shape moves the first shaft 72A to the lower left. , Deforming while maintaining a parallelogram. At this time, a force to move the first shaft 72A in the upper right direction is applied to the link by a spring (not shown), and a force to pull the frame 20 upward by the pulling spring 76 is applied. However, if the arm 5 is normally operated, the force by which the arm 5 pushes the first shaft 72A is superior to those forces. Then, according to the movement of the cylindrical member 73 that moves while being guided by the guide hole 74A in the downward direction of the length of the guide hole 74A, the frame 20 to which the cylindrical member 73 is fixed moves to the lower left, and the blade 18 cut | disconnects the target object mounted on the surface which continues from the table of the main body case 3. FIG.
In the process of moving the frame 20 downward, the rollers 71B1 and 71C1 of the second link member 71B and the third link member 71C abut against the upper portion of the frame 20. In the second link member 71B, the first shaft 72A serves as a power point, the third shaft 72C serves as a fulcrum, and the contact point between the roller 71B1 and the frame 20 serves as a working point. In the third link member 71C, the second shaft 72B serves as the power point. 4 axis 72D serves as a fulcrum, and the contact point between the roller 71C1 and the frame 20 serves as an action point, and the force that moves the arm 5 downward in both the second link member 71B and the third link member 71C is based on the lever principle. 20 is amplified and transmitted. Thereby, the force required when the user moves the arm 5 can be kept small.
When the cutting of the object is completed and the user returns the arm 5 upward, the frame 20 returns upward due to the urging force from the pulling spring 76, and the parallelogram link returns the first shaft 72A to the initial position. It returns to its original position by the urging force from a spring (not shown) to be made. This prepares for the next cutting of the object.
In addition, although the blade 18 in this embodiment keeps the blade edge substantially parallel to the upper surface of the object X, the blade 18 moves obliquely downward as shown in FIG. The blade edge may be moved downwardly as shown in FIG. 7B while maintaining substantially parallel to the upper surface of the object X. Such a change can be easily realized by appropriate correction of the link mechanism. In addition, when the angle between the blade edge (the blade edge will be described in detail later) and the upper surface of the object X is not substantially parallel to the upper surface of the object X, for example, 5 °. In the case where the angle is within the range, the angle is changed as the blade 18 moves.

The blade 18 in this embodiment will be described.
FIG. 8A shows a rear view of the blade 18 in this embodiment, and FIG. 8B shows a side view thereof.
The blade 18 in this embodiment has a long rectangular shape as shown in FIG. The length of the blade 18 is somewhat shorter than the length of the main body case 3 in the longitudinal direction. Of the lower end of the blade 18, the entire portion that can be cut (the portion that is sharply configured) is the blade edge 18 </ b> B. The blade edge 18B usually exists over the entire length of one side of the blade 18.
The blade 18 in this embodiment is a single blade as shown in FIG. The blade angle θ1 of the blade 18 is not limited to this, but is 30 ° ± 5 ° in this embodiment. This range is suitable for reducing the force for rotating the arm 5 that is required of the user when cutting the object.
The blade 18 is not necessarily a single blade. For example, a double-edged blade as shown in FIG. Also in this case, the blade angle θ2 is preferably 30 ° ± 5 °. Further, the blade 18 may be a two-stage blade as shown in FIG. In this case, two blade angles, θ3 and θ4, can be considered. In this case, θ3 of θ3 and θ4 should be 30 ° ± 5 °.
Further, the harder the blade 18, the lower the possibility of breakage, and the cutting performance when cutting the object is improved. Although not limited to this, it is preferable to use a carbon tool steel or a material having a hardness equal to or higher than that of the blade 18 in this embodiment, and this embodiment does so. Examples of the carbon tool steel include SK materials referred to in Japanese Industrial Standards (JIS standards). More specifically, the blade 18 in this embodiment is made of SK2.

DESCRIPTION OF SYMBOLS 100 Cutting machine 2 Table 3 Main body case 4 Blade body 18 Blade 20 Frame 70 Link mechanism 71A 1st link member 71B 2nd link member 71C 3rd link member 71B1 Roller 71C1 Roller 73 Cylindrical member 74 Guide member 74A Guide hole 76 Lifting spring

Claims (5)

A blade for cutting the object by pressing against the surface of the object to be cut while keeping the blade edge in a substantially parallel state, and the blade away from the object is directed toward the object A cutting machine having an operating means that a user moves to move it and a link means that transmits a force applied to the operating means to the blade,
The link means is
A frame for fixing the blade attached to the upper side of the blade;
A second link member and a third link member, each of which has a lower end connected to the frame so that the lower ends thereof are rotatable,
A first link member in the form of a rod that is pivotally connected to the respective upper ends of the second link member and the third link member;
With
Between the first link member, the second link member, the third link member, a portion of the frame connected to the second link member, and a portion connected to the third link member. Is configured to form a link that can be deformed while maintaining a parallelogram shape as a whole while maintaining an acute angle between the first link member and the second link member,
Below the second link member is provided a second contact body that contacts the upper side of the frame when the second link member falls, and below the third link member, A third abutting body that abuts on the upper side of the frame when the third link member falls down is provided;
And, by pressing the portion where the first link member and the second link member are connected downward with the operation means, the link can be deformed to be crushed downward.
Cutting machine. The second abutting body is attached to the second link member so as to be rotatable around the second axis via a second axis, and a side surface of the second abutting body is configured to be able to abut on the upper side of the frame. The roll of
The third abutment body is attached to the third link member so as to be rotatable around the third axis via a third axis, and the side surface of the third abutment body is abuttable to the upper side of the frame. It ’s a roll of
The cutting machine according to claim 1. An elastic body is provided that applies a force to move the blade upward with respect to the blade that has been lowered downward by the force from the operation means.
The cutting machine according to claim 1. The elastic body is adapted to give a force that pulls the frame upward.
The cutting machine according to claim 3. Comprising a restricting means for restricting a moving direction in the left-right direction when the frame moves up and down;
The cutting machine according to claim 1.

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