JPH0615992U - Push-cut type cutter - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent cracks in the material to be cut during cutting. [Constitution] Upper frame 14 is an arc-shaped tilt guide
The blade back 36 is formed in a circular arc shape corresponding to the inclined guide of the upper frame. Then, the blade portion 12 is supported so as to be tiltable with respect to the upper frame 14 under the movement in the length direction along the tilt guide 38 of the upper frame.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a push-cut type cutter that cuts a member to be cut placed on a cutting base by pushing a blade part in the direction of the cutting base in conjunction with a pressing operation of an operation handle.

[0002]

[Prior art]

 For example, a so-called push-cut type cutter that pushes the blade part into the member to be cut and cuts it under the operation of pushing down the operation handle is provided as a cutting machine for various members such as roofing materials, tiles, and steel plates. There is.

A push-cut type cutter includes, for example, an upper frame having a projecting blade portion on a lower end surface and a lower frame having an upper end surface as a cutting base, and the upper frame has a pivot point serving as a fulcrum. And is rotatably attached to the lower frame. The upper frame is provided so as to be rotatable about a fulcrum, for example, in conjunction with pulling up and pushing down the operation handle.

In such a push-cut type cutter, the member to be cut is placed on the cutting base of the lower frame. Then, the push-cut type cutter is configured so that the member to be cut can be cut when the blade is brought into contact with the member to be cut and pushed in with the operation of pushing down the operation handle.

In such a push-cut type cutter, the blade portion is usually fixed to the upper frame so as to abut substantially horizontally to the cutting base portion of the lower frame, and the blade portion abuts on the cutting base portion. The member to be cut is surely cut.

[0006]

[Problems to be solved by the device]

 By the way, in the known configuration, the blade rotates together with the upper frame with the fulcrum as the center, and contacts the base of the lower frame almost horizontally. Therefore, the upper surface of the member to be cut placed on the base is Is not horizontally abutted against.

That is, when the upper frame rotates in the lower frame direction in accordance with the operation of the operation handle, the blade portion is pushed obliquely to the member to be cut from the side close to the fulcrum, and the member to be cut is cut. Is gradually cut from the side closer to the fulcrum to the side farther.

However, when cutting a brittle part having high hardness such as a concrete panel or a tile, when the blade part is pushed obliquely at the side close to the fulcrum, the part to be cut is partially cut. When a cut is made, cracks on the member surface are likely to occur from the cut. Therefore, the member may be damaged or damaged, and the cut surface according to the cut dimension cannot be obtained.

Here, in general, the blade is curved so as to have a curved shape so as to suppress cracking of a brittle member or the like. However, even in this configuration, the blade is horizontally contacted with the upper surface of the member to be cut. I can't get enough contact. Therefore, cracking of the member to be cut is unavoidable, and cracking cannot be sufficiently prevented.

Further, since the blade portion is formed into a curved shape, the processing of the blade portion is likely to be complicated and the blade portion may be expensive, which is not preferable.

By the way, if the blade portion of the upper frame is moved up and down substantially parallel to the cutting base portion of the lower frame, a substantially horizontal contact with the upper surface of the member to be cut can be obtained. However, such a configuration is not preferable because the cutter itself tends to be complicated and large, and the cost becomes high.

An object of the present invention is to provide a push-cut type cutter capable of sufficiently preventing cracks at the time of cutting a member to be cut having high hardness.

[0013]

[Means for Solving the Problems]

 To achieve this object, according to the present invention, the blade portion is supported so as to be tiltable in the length direction with respect to the upper frame.

[0014]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a push-cut type cutter 10 according to the present invention comprises an upper frame 14 having a blade portion 12 and a lower frame 18 having a cutting base portion 16.

For example, one of the left and right sides (right end) in the figure of the upper frame 14 is pivotally attached to the corresponding side of the lower frame 18 by a pivot pin 20, with the pivot point (pivot pin) as the fulcrum. The upper frame is rotatable in the vertical direction with respect to the lower frame. The blade portion 12 is provided so as to project from the lower end surface of the upper frame 14.

As can be seen from FIG. 1, the upper end surface of the lower frame 18 is formed as a cutting base portion 16 of the push-cut type cutter 10. Usually, the cutting base 16 of the lower frame is formed as a plane with which the entire blade 12 can abut horizontally.

In such a configuration, the blade 12 and the cutting base 16 are expanded and closed by the rotation of the upper frame 14 with respect to the lower frame 18 around the fulcrum (pivotally attached pin) 20. The member 22 to be cut placed on the cutting base can be cut by closing the blade and the cutting base.

The lower frame 18 is formed with a pair of stands 24 that are separated from each other in the left-right direction in the figure by a predetermined distance, and the pair of stands enables a stable placement of the push-cut type cutter on the floor or the like. Has become.

In such a push-cut type cutter 10, the operation handle 26 is provided so as to be capable of swinging up and down, and the upper frame 14 and the lower frame 18 are interlocked with the swinging operation of the operation handle. It is configured to be rotatable with respect to.

One end of the operation handle 26 is pivotally attached by a pivot pin 30 to a support rod 28 provided on the lower frame 18 at the free end side of the upper frame 14, and swings about the pivot pin. The operation handle can be raised and pushed down under the influence of movement.

The operation handle 26 is connected to the free end of the upper frame 14 by a connecting pin 32 provided at a position separated from the pivot pin 30 by a predetermined distance. Here, as can be seen from FIG. 1, the connecting pin 32 at one end of the operation handle is loosely inserted in the elongated hole 34 of the upper frame 14.

In such a configuration, the deviation between the rotation locus of the connecting pin 32 around the pivot pin 30 and the rotation locus of the upper frame 14 around the fulcrum 20 is inside the elongated hole 34. Since it is absorbed by the movement of the connecting pin, the rotation of the upper frame 14 interlocked with the operation handle 24 is guaranteed.

For example, when the operating handle 26 is pushed down from the expanded state between the blade portion 12 and the cutting base portion 16 as shown in FIG. 1, the connecting pin 32 is lowered due to the swinging of the operating handle, whereby the upper frame is lowered. 14 rotates counterclockwise about the fulcrum 20, that is, downward. Then, while moving the connecting pin 32 in the long hole, the operation handle 26 and the upper frame 14 are interlocked, and as shown in FIG. 2, the blade portion 12 of the upper frame comes into contact with the cutting base portion 16 of the lower frame. By moving downward, the member 22 to be cut placed on the cutting base is cut.

By the way, according to this invention, the blade portion 12 is supported with respect to the upper frame 14 so as to be tiltable in the longitudinal direction.

As shown in FIG. 1, the upper frame 14 is formed with an inclined guide 38 that can be engaged with the spine 36 of the blade 12. As can be seen from FIG. 3 in addition to FIG. 1, the upper frame 14 is formed, for example, with a concave portion 40 capable of accommodating the blade portion 12, and a step between the upper frame surface and the concave portion is formed by the blade portion. It is configured as an inclined guide 38 that can be engaged with the spine 36 of the.

The tilt guide 38 has, for example, an arc shape as shown in FIG. 1, and the blade back 36 is formed in an arc shape corresponding to the tilt guide.

Further, as shown in FIG. 1, the blade portion 12 is formed, for example, by having two arc-shaped guide holes 42 corresponding to the inclined guides 38 of the upper frame at two positions. The blades are supported by the upper frame by the mounting pins 44 fixed to the upper frame 14. As shown in FIG. 3, as the mounting pin 44, for example, a stepped bolt that can be loosely inserted in the guide hole 42 of the blade portion can be used.

In such a configuration, the blade portion 12 is attached to the upper frame 14 so as not to be detachable and movable along the inclined guide 38 and the guide hole 42. The guide hole 42 ensures the range of movement of the blade 12, that is, the range of inclination of the blade with respect to the upper frame 14, and the inclination of the blade due to the engagement between the guide hole end and the mounting pin 44. Limited range.

Here, in the present invention, as shown in FIGS. 1 and 2, between the upper frame 14 and the lower frame 18, for example, at the time of maximum expansion, the cutting base 16 is substantially leveled. Is set as the inclination base point of the blade portion 12, and the guide hole 42 is formed so that the blade portion can be moved and inclined from the inclination base point to the fulcrum direction, that is, to the right in the drawing.

The blade portion 12 is biased in the direction of the inclination base point by the return spring 46. As shown in FIG. 1, as the return spring 46, for example, a tension coil spring stretched between the pair of locking pins 48 and 50 of the blade portion 12 and the upper frame 14 can be used, and the bias of the tension coil spring can be used. Under the force, the blade is pulled toward the base of the tilt, that is, to the left in the figure.

For example, as shown in FIG. 1, when the operation handle 26 is pulled up, the space between the upper frame 14 and the lower frame 18, that is, the blade 12 and the cutting base 16 is widened. Then, in such a state, if the member 22 to be cut is placed on the cutting base 16 and the operation handle 26 is pushed down, the blade 12 rotates together with the upper frame 14 toward the cutting base, as shown in FIG. As described above, first, the blade portion partially abuts the upper surface of the member to be cut on the side farther from the fulcrum 20 (left side in the drawing).

Here, in the present invention, the blade portion 12 can be inclined in the length direction with respect to the upper frame 14. In other words, on the left side of the drawing, when the blade portion 12 partially abuts the member to be cut 22 and the pressing force against the biasing force of the return spring 46 acts on the blade portion, the blade portion moves to the inclined guide 38. Along the line, it inclines while moving to the right in the figure. Then, as shown in FIG. 5, the blade portion 12 inclines with movement until it abuts the upper surface of the member 22 to be cut substantially horizontally, and is stopped in a state of abutting horizontally.

Then, when the operation handle 26 is further pushed down from such a state and the blade portion 12 is pushed into the member 22 to be cut, the blade portion is entirely pressed against the member to be cut by the action of the downward operating force. Thus, the member to be cut is cut (see FIG. 2).

That is, according to the present invention, the blade portion 12 is horizontally pressed against the member 22 to be cut by the inclination of the blade portion 12 with respect to the upper frame 14, and the blade 12 is pushed down by the operation handle 26. Since it is pushed uniformly over the entire range of the cutting member, the member to be cut can be cut without making a partial cut.

Therefore, even a brittle member such as a concrete plate or a tile can be cut without causing cracks, and a cut section having a dimension that is sufficiently suppressed from damage or damage can be easily obtained.

Since the blade portion 12 freely tilts with respect to the upper frame 14, the blade portion can be tilted to a horizontal position with respect to the upper surface of the member to be cut regardless of the mounting position and thickness of the member to be cut 22. . Therefore, the placement position and thickness of the member to be cut 22 are not limited, and the push-cut type cutter 10 having excellent versatility can be secured.

Further, since it is sufficient that the blade portion 12 can be inclined with respect to the upper frame 14, the configuration does not become complicated. Further, since the blade portion 12 is not subjected to any special processing, the push-cut type cutter 10 that prevents cracks in the member 22 to be cut can be provided at a sufficiently low cost.

The blade portion 12 after cutting the member 22 to be cut is in contact with the cutting base portion 16 substantially horizontally under the inclination. Therefore, the cut member 22 is not left uncut, and the cut member can be surely cut easily.

Further, as shown in FIG. 1, the blade portion 12 is substantially horizontal with respect to the cutting base portion 16 when the upper frame 14 and the lower frame 18 are opened, for example. Therefore, a maximum expansion space can be secured between the blade 12 and the cutting base 16, and the member 22 to be cut can be easily placed on the cutting base, and the mounting position, width, thickness, etc. of the member to be cut can be set. Without limiting the workability, workability is sufficiently improved.

Here, in the embodiment, the blade portion 12 can be tilted along the arc-shaped tilt guide 38 of the upper frame. However, even when the guide hole 42 of the blade portion and the mounting pin 44 are engaged with each other, the inclination direction and the inclination range of the blade portion 12 are defined, so that the inclination guide 38 of the upper frame may be omitted. Good.

However, if the back 36 of the blade portion is entirely supported by the inclined guide 38, the reaction force acting on the blade portion 12 when the member 22 to be cut is cut is not concentrated on the mounting pin 44, Since it is dispersed in the inclined guide, it is possible to secure a sufficient supporting force that can withstand the reaction force during cutting.

Further, since the tilt guide 38 and the back 36 of the blade are respectively formed in a corresponding arcuate shape, the pushing force of the operating handle 26 causes the blade to move at any angle of inclination of the blade 12. Worked evenly over the entire length. Therefore, cracking due to partial indentation of the blade portion 12 is also prevented from this point.

Further, in the embodiment, the inclination range of the blade portion 12 with respect to the upper frame 14 is limited under the engagement between the guide hole 42 and the mounting pin 44, but the invention is not limited to this. The inclination range of the blade may be limited by the above means.

However, if the combination of the guide hole 42 and the mounting pin 44 is used, the inclination range of the blade portion 12 can be surely limited without complicating the structure.

Further, the return spring 46 is embodied as a tension coil spring, but the present invention is not limited to this, and the return spring may be formed of another spring member.

Further, the guide holes 42 of the blade portion are provided at two places. However, it is sufficient if at least the blade 12 is supported and the range of inclination of the blade with respect to the upper frame 14 is limited, so the number of guide holes 42 is not limited to two, and one or more guide holes 42 may be provided. Good.

Here, in the embodiment, a position substantially parallel to the cutting base portion 16 when the upper frame 14 and the lower frame 18 are opened is illustrated as an inclined base point of the blade portion 12. However, the present invention is not limited to this. For example, as in the push-cut type cutter 110 shown in FIG. 6, when the upper frame 14 and the lower frame 18 are closed, the blade base 112 is inclined at a position where the cutting base 16 is substantially flat. It may be used as a base point.

In such a configuration, the blade portion 112 is formed so as to be movable and tiltable in the anti-fulcrum direction (left side in the figure) from the tilt base point by the guide hole 142 extending rightward in the figure. The spring 146 is biased in the direction of the inclination base point (rightward in the figure).

As shown in FIG. 6, in such a push-cut type cutter 110, the blade portion 112 abuts the upper surface of the member 22 to be cut from the side close to the fulcrum 20 (right side in the figure), and the inclined guide Along 38, tilt while moving to the left in the figure. That is, even in such a configuration, the blade 112 is inclined with respect to the upper frame 14 in accordance with the operation of pushing down the operation handle 26, so that the blade is substantially horizontal to the upper surface of the member 22 to be cut. Abutment is obtained. Therefore, also in such a push-cut type cutter 110, the same effect as that of the above configuration can be obtained.

Further, in the embodiment, the upper frame 14 is embodied as the push-cut type cutter 10 that rotates together with the blade portion 12 in conjunction with the swing of the operation handle 26, but the fulcrum is centered. The push-cut type cutter is not limited to the illustrated configuration, as long as the configuration is such that the member to be cut can be cut under such rotation. For example, the present invention can be applied to a push-cut type cutter in which the operation handle is integrally formed with the upper frame.

In the examples, the concrete cutters, tiles and the like are embodied as push-cut type cutters to be cut. However, since it is sufficient to cut by operating the operation handle, various other members can be used. The invention may be applied to a push-cut type cutter for cutting.

The above-described embodiments are for explaining the present invention, and do not limit the present invention in any way, and all the modifications and alterations made within the technical scope of the present invention are also included in the present invention. It goes without saying that it is included in the invention.

[0054]

[Effect of device]

 As described above, according to the push-cut type cutter of the present invention, the blade portion is horizontally and evenly pushed into the member to be cut while being inclined under the rotation of the upper frame. Therefore, even a brittle member having a high hardness can be cut without causing cracks, and a cut surface having a dimension in which breakage or damage is sufficiently suppressed can be easily obtained.

Since it suffices that the blade can be tilted with respect to the upper frame, it is possible to sufficiently prevent the structure from becoming complicated and the cutter itself from becoming large.

If the inclination guide is formed in an arc shape, the back of the blade can be supported as a whole, and the reaction force acting on the blade when cutting the material to be cut does not concentrate on the mounting pin, Distributed by guides. Therefore, a sufficient supporting force capable of withstanding the reaction force at the time of cutting can be secured between the blade portion and the upper frame, and the blade portion can be sufficiently prevented from being damaged.

Further, since the tilt guide and the back of the blade are respectively formed in the corresponding arcuate shapes, the pushing force of the operating handle acts evenly on the blade at any tilt angle of the blade. To be done. Therefore, cracking due to partial indentation of the blade is also prevented from this point.

Further, if the inclination range of the blade portion with respect to the upper frame is limited under the engagement between the guide hole and the mounting pin, the inclination range of the blade portion can be reliably defined without complicating the configuration. .

When the blade base has an inclined base point at a position that is substantially horizontal to the cutting base when the upper frame and the lower frame are expanded, a maximum expansion space can be secured between the blade and the cutting base. Therefore, the member to be cut can be easily placed on the cutting base, and the workability is sufficiently improved without limiting the placement position, width, thickness, etc. of the member to be cut.

Further, when the blade is configured to be biased toward the inclination base point by the return spring, the blade portion is returned to the inclination base point in the free state of the member to be cut. Therefore, it is possible to sufficiently obtain a smooth response of the blade to the upper surface of the member to be cut during cutting.

[Brief description of drawings]

FIG. 1 is a front view of a push-cut type cutter according to the present invention before cutting a member to be cut.

FIG. 2 is a front view of the push-cut type cutter after cutting the member to be cut.

FIG. 3 is an end view taken along the line AA of FIG.

FIG. 4 is a front view of the push-cut type cutter when the blade portion partially abuts the member to be cut.

FIG. 5 is a front view of the push-cut type cutter when the blade portion is inclined.

FIG. 6 is a front view of a push-cut type cutter according to another embodiment of the present invention.

[Explanation of symbols]

 10, 110 Push-cut type cutter 12, 112 Blade 14 Upper frame 16 Cutting base 18 Lower frame 20 Pivot pin (fulcrum) 22 Cutting target member 26 Operation handle 36 Blade back 38 Inclined guide 42, 142 Guide hole 44 Mounting pin 46,146 Return spring

Claims (4)

[Scope of utility model registration request] 1. An upper frame having at least a protruding blade portion on a lower end surface thereof is rotatably attached to a lower frame having an upper end surface as a cutting base portion via a pivot point serving as a fulcrum, and pushes down an operation handle. In the push-cut type cutter that cuts the member to be cut placed on the cutting base by pushing the blade toward the cutting base in conjunction with the operation, the blade can be inclined in the longitudinal direction with respect to the upper frame A push-cut type cutter characterized by being supported by. 2. An upper frame having at least a protruding blade portion on a lower end surface thereof is rotatably attached to a lower frame having an upper end surface as a cutting base portion via a pivot point serving as a fulcrum, and pushes down an operation handle. In a push-cut type cutter that cuts a member to be cut placed on the cutting base by pushing the blade part in the direction of the cutting base, which is interlocked with the operation, the upper frame is formed with an arc-shaped inclined guide. At the same time, the spine of the blade is formed in an arc shape corresponding to the tilt guide of the upper frame, and the blade moves relative to the upper frame as it moves in the length direction along the tilt guide of the upper frame. A push-cut type cutter that is supported so that it can be tilted. 3. The blade portion is formed with at least one arc-shaped guide hole corresponding to the inclined guide of the upper frame, and by a mounting pin fixed to the upper frame via the guide hole, The push-cut type cutter according to claim 2, wherein the blade portion is supported by the upper frame, and a range of inclination of the blade portion with respect to the upper frame is limited by engagement between the guide hole and the mounting pin. 4. A position that is substantially parallel to the cutting base when the upper frame and the lower frame are opened is set as an inclination base of the blade, and the inclination of the blade accompanying the movement from the inclination base to the fulcrum is set. The push-cut type cutter according to claim 2 or 3, wherein the guide hole is formed so as to be able to guarantee, and the blade portion is biased toward the inclined base point by the return spring.