JP2010161943A - Clipper cutter, and clipper-system mowing blade device including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clipper cutter, and a clipper-system mowing blade device including the clipper cutter each efficiently cutting an object to be cut. <P>SOLUTION: The clipper cutter is such that at least one of two plate-like blades 1, 2 is reciprocated in a surface direction while the two blades 1, 2 are superimposed on each other to put an object to be cut C between the edges of the two blades 1, 2 so as to shear the object. The two blades 1, 2 respectively include base parts 11, 21, and blade parts 12, 22 projecting in a direction intersecting with a direction where the blades 1, 2 are reciprocated based on the base parts 11, 21, and recessed edge parts 12b, 22b each curved in a recessed state in a plan view are formed at least one side part of the blade parts 12, 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hair clipper blade used for trimming branches, vegetation, and the like, and a hair clipper type blade device provided with the hair clipper blade.

  Conventionally, a hand-held clipper type cutting blade device has been used for trimming branches, plants, and the like. The clipper-type cutting blade device reciprocates in a predetermined direction with two plate-shaped blades superimposed, and shears by sandwiching an object to be cut such as a branch or a plant between the edges of the two blades. (See Patent Document 1).

  Each of the two plate-like blades provided in such a clipper-type cutting blade device has a plurality of blade portions (blade bodies 2a and 2b in Patent Document 1) that protrude in a chevron shape. Provided (see FIG. 13). When cutting the workpiece, reciprocate the two blades in a specified direction so that the blade provided on one blade and the blade provided on the other blade partially overlap, The object is sandwiched between the edges of two blades and sheared.

JP 2006-296238 A

  However, in the conventional technique, each blade portion has a simple mountain shape. Therefore, even if the object to be cut exists between the two blade parts, the object to be cut escapes due to the movement of the blade, and a part of the object to be cut can be removed by one cutting operation. I fail to cut. Therefore, when considering the entire cutting object, there is a problem that the time required for the pruning operation increases and the efficiency is low.

  The present invention has been made in view of the above-described conventional problems, and provides a clipper blade capable of efficiently cutting an object to be cut and a clipper type cutting blade device including the clipper blade. It is aimed.

  The cutting tool for clippers of the present invention is cut at the edge of the two blades by reciprocating at least one of the two blades in the surface direction in a state where the two plate-like blades are overlapped. Each of the two blades has a base portion and a blade portion projecting in a direction intersecting the reciprocating direction of the blade with respect to the base portion. In addition, a concave edge portion curved in a concave shape in plan view is formed on at least one side portion of the blade portion.

  According to this invention, the concave edge part curved in concave shape by planar view is formed in the side part of a blade part. When the workpiece is sandwiched between the two blade portions, a force acts on the workpiece in the direction toward the base by the concave edge portion. That is, the object to be cut is drawn toward the proximal end between the two blades, and is sheared while being substantially captured between the two blades. Therefore, escape during cutting of the workpiece can be suppressed, and the workpiece can be efficiently cut.

  Moreover, it is preferable that a concave edge part is formed in the said some blade part, and it is formed so that all the concave edge parts may be dented in the same direction.

  According to the present invention, all the concave edge portions are formed to be recessed in the same direction. That is, the concave edge portion is recessed in the same direction according to the dominant arm of the operator, so that the clipper blade can be classified into left-handed and right-handed only.

  Moreover, a concave edge part may be formed in the said several blade part, and the one part concave edge part may be formed so that it may dent in the direction different from another concave edge part.

  According to the present invention, some of the concave edge portions are formed so as to be recessed in a direction different from that of the other concave edge portions, so that the clipper blade can be used as both left-handed and right-handed.

  A clipper-type cutting blade device of the present invention includes the above-described clipper blade and drive means connected to the base of the clipper blade and reciprocating at least one blade in the surface direction. And

  According to the present invention, an object to be cut can be efficiently cut.

It is a conceptual diagram for demonstrating the whole clipper type cutting blade apparatus. It is a figure of the state which assembled | attached the cutter for clippers of Embodiment 1 to the fixing member. FIG. 3 is a plan view of the upper blade of the first embodiment. FIG. 3 is a plan view of the lower blade of the first embodiment. It is a figure explaining the state which caught the to-be-cut object between the concave edge part and the convex edge part. It is a figure of the state which assembled the upper blade and lower blade of Embodiment 2. FIG. 6 is a plan view of an upper blade of a second embodiment. FIG. FIG. 10 is a plan view of the lower blade of the second embodiment. It is a figure of the state which assembled the upper blade and lower blade of another form. It is a top view of the upper blade of other forms. It is a top view of the lower blade of another form. It is a top view for demonstrating the blade for blades of another form. It is a top view for demonstrating the knife for clippers of a comparative example. It is a top view for demonstrating the arrangement | positioning state of a to-be-cut object.

  Hereinafter, the clipper blade and the clipper type cutting blade device according to the first and second embodiments will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a conceptual diagram for explaining the whole of the clipper type cutting blade device.

  As shown in FIG. 1, the clipper type cutting blade device of the first embodiment includes a clipper blade 100 composed of two plate-shaped blades (hereinafter referred to as an upper blade 1 and a lower blade 2), and a clipper blade. 100, a driving mechanism (driving means) 4 that reciprocates the upper blade 1 and the lower blade 2, a housing 3 that covers the clipper blade 100 and the drive mechanism 4, and a fixing member to which the clipper blade 100 is fixed. 6 is provided.

  FIG. 2 is a plan view showing a state in which the clipper blade 100 according to the first embodiment is assembled to the fixing member 6. FIG. 3 is a plan view of the upper blade 1. FIG. 4 is a plan view of the lower blade 2. In FIG. 2, the lower blade 2 is assembled with the state of FIG. 4 turned upside down.

  As shown in FIGS. 1 and 2, the clipper cutting tool 100 is a pin composed of a shaft portion and a head portion on a fixed member 6 with the lower surface of the upper blade 1 placed on the upper surface of the lower blade 2. It is fixed via the shaped fastener 5 and is configured to reciprocate in the plane direction in the driving state. The cutting tool 100 for clippers of the present embodiment has improved cutting performance by devising the shapes of the upper blade 1 and the lower blade 2. The form of the clipper blade 100 will be described in detail later.

  The drive mechanism 4 includes a motor 41 and a shaft 42 that rotates in response to the rotational force of the motor 41. Two unillustrated cams are fixed to the lower end of the shaft 42. When the clipper blade 100 is assembled to the drive mechanism 4, one cam is engaged with the upper blade 1 and the other cam is engaged with the lower blade 2. When the shaft 42 is rotated by receiving the driving force of the motor 41, each cam transmits power to the upper blade 1 and the lower blade 2, and the upper blade 1 and the lower blade 2 are moved periodically. Specifically, the upper blade 1 and the lower blade 2 are repeatedly moved so as to rotate by a predetermined angle in different directions around the fastener 5.

  The housing 3 is a housing portion 30 that is a housing that covers the proximal end side of the clipper blade 100 and the drive mechanism 4, and a handle portion 31 that is a portion that is gripped by an operator and that includes an operation switch (not shown). including.

  The fixing member 6 is a dish-like member, and the clipper blade 100 is attached to the upper surface in a state where a predetermined rotational movement is possible. The fixing member 6 is configured to be able to be engaged and disengaged at a predetermined position of the housing 3. The fixing member 6 is provided with a mounting portion for mounting a pin-shaped fastener 5 composed of a shaft portion and a head portion at a predetermined position, and the shaft portion of the fastener 5 is the upper blade 1 and the lower blade. 2 is inserted into holes (insertion holes 11a2 and 21a2 described later) and attached to the attachment portion. In this manner, the clipper blade 100 is attached to the fixing member 6. By assembling the clipper blade 100 to the housing 3 through the fixing member 6, the clipper blade 100 can be exchanged more easily than assembling the clipper blade 100 directly to the housing 3.

  Here, the clipper blade 100 will be described in detail.

  As shown in FIG. 3, the upper blade 1 of the clipper cutting tool 100 is provided with a base portion 11 that is a portion for incorporating the upper blade 1 into the housing 3 and a plurality of protrusions protruding from the base portion 11 toward the distal end side. The blade part 12 which is a part which cut | disconnects a to-be-cut object directly is formed.

  The base 11 includes a mounting portion 11a provided on the base end side, and a widened plate portion 11b provided on the distal end side of the mounting portion 11a and wider than the width of the mounting portion 11a. The mounting portion 11a is a portion for fixing the upper blade 1 to the fixing member 6, and the driving force of the drive mechanism 4 is transmitted to the mounting portion 11a. The mounting portion 11a is formed with a power transmission hole 11a1 having an oblong shape and an insertion hole 11a2 formed on the distal end side from the power transmission hole 11a1. The insertion hole 11 a 2 is a hole through which the fastener 5 is inserted, and is formed in a shape corresponding to the outer shape of the shaft portion of the fastener 5. When the drive mechanism 4 and the clipper blade 100 are assembled, one of the two cams of the drive mechanism 4 is fitted into the power transmission hole 11a1. In order to form as many blade parts 12 as possible, the width of the widened plate part 11b is set larger than the mounting part.

  The blade portion 12 protrudes from the tip of the widening plate portion 11b in a direction intersecting the reciprocating motion direction of the upper blade 1 when the clipper type cutting blade device is driven, that is, in this embodiment, the insertion hole A plurality are formed so as to protrude in the radial direction of a circle centering on 11a2.

  Moreover, in this Embodiment, it forms in the side part of each blade part 12 so that the convex edge part 12a of the shape curved in convex shape by planar view may be opposed to the convex edge part 12a, A concave edge portion 12b that is curved in a concave shape as viewed is formed. The convex edge portion 12 a and the concave edge portion 12 b are portions processed so as to be sharpened sharply toward the edge of the blade portion 12. The object to be cut is cut by being pressed by the convex edge portion 12a and the concave edge portion 12b. By forming the concave edge portion 12b, it is possible to generate a force that draws the workpiece toward the proximal end when the workpiece is cut.

  In the present embodiment, all the convex edge portions 12a are formed to be convex in the same direction in a plan view, and all the concave edge portions 12b are formed to be recessed in the same direction in a plan view. .

  The clipper blade 100 of the present embodiment corresponds to a right-handed worker. For example, a right-handed worker tends to move what is gripped with the right hand from right to left (that is, in a direction approaching the operator's torso). In consideration of such a tendency, the direction of the concave edge portion 12b is determined in the clipper blade 100 of the present embodiment. Thereby, a right-handed worker can perform pruning work such as plants more efficiently. Thus, by providing the concave edge portions 12b in the same direction, the structure corresponding to the dominant arm of the operator can be obtained.

  The lower blade 2 is also formed with a base portion 21 and a blade portion 22 similar to the upper blade 1. That is, the base portion 21 includes a mounting portion 21a and a widening plate portion 21b, and a power transmission hole 21a1 and an insertion hole 21a2 are formed in the mounting portion 21a. Moreover, the blade part 22 is provided with two or more so that it may protrude from the front-end | tip of the widening board part 21b. Each blade portion 22 has an edge. The edge includes a convex edge portion 22a and a concave edge portion 22b. About the form and function of each part which comprise the lower blade 2, since it is substantially the same as the form of each part which comprises the upper blade 1, detailed description here is abbreviate | omitted.

  As shown in FIG. 2, the upper blade 1 and the lower blade 2 are assembled to the fixing member 6 in a state where the blade portion 22 of the lower blade 2 is positioned between two adjacent blade portions 12 of the upper blade 1. The lower blade 2 is assembled in the reverse direction from the state of FIG.

  FIG. 5 is a diagram illustrating a state in which the workpiece C is captured between the concave edge portion 12 b of the upper blade 1 and the convex edge portion 22 a of the lower blade 2.

  When the clipper blade 100 is driven, as shown in FIG. 5, the blade portion 12 of the upper blade 1 moves in the direction indicated by the arrow D1, and the blade portion 22 of the lower blade 2 moves in the direction indicated by the arrow D2. Moving. At this time, the workpieces C1, C2, and C3 that are in contact with the concave edge portion 12b formed on the blade portion 12 of the upper blade 1 are orthogonal to the concavely curved line of the concave edge portion 12b. The forces P1, P2, and P3 acting on are received.

  Here, the force P1 is decomposed into a component force P1x acting in a direction parallel to the arrow D1 and a component force P1y acting perpendicular to the arrow D1 and acting toward the base 11 side. That is, the workpiece C1 is drawn to the base end side of the clipper blade 100 by the component force P1y. Similarly, the forces P2 and P3 are decomposed into a component force P2x and a component force P2y, and the force P3 is decomposed into a component force P3x and a component force P3y. Therefore, the workpiece C2 and the workpiece C3 are pulled to the proximal end portion side of the clipper blade 100 by the component force P2y and the component force P3y that are orthogonal to the arrow D1 and act toward the base portion 11 side. .

  In this way, the clipper blade 100 of the present embodiment shears in a state where the workpiece C is almost captured.

(Embodiment 2)
The clipper blade 100 of the clipper type cutting blade device of the first embodiment is exclusively for right-handed use, whereas the clipper blade 110 of the clipper type cutting blade device of the second embodiment is also used for right-handed left-handed use.

  FIG. 6 is a view showing a state where the clipper blade 110 according to the second embodiment is assembled to the fixing member 6. FIG. 7 is a plan view of the upper blade 1 of the second embodiment. FIG. 8 is a plan view of the lower blade 2 of the second embodiment.

  Specifically, as shown in FIGS. 6 to 8, the blade portion 12 of the upper blade 1 and the blade portion 22 of the lower blade 2 pass through the centers of the insertion holes 11 a 2 and 21 a 2 that allow the fastener 5 to pass therethrough. It has a shape that is line symmetric with respect to the line Ax1. That is, the concave edge portions 12b and 22b are recessed in the opposite direction with the center line Ax1 as a boundary.

  As a result, when the right-handed operator uses the clipper-type cutting blade device of the present embodiment, one side of the center line Ax1 (the center line Ax1 in FIGS. 6, 7, and 8). When the left-handed worker uses the clipper-type cutting blade device of the present embodiment, the other side (FIG. 6, FIG. 6) 7, in FIG. 8, the pruning operation is performed particularly efficiently on the left side of the center line Ax1).

  According to the above embodiment, the concave edge portions 12b and 22b having the concave edges are formed on the plurality of blade portions 12 and 22 provided on the upper blade 1 and the lower blade 2, respectively. When the workpiece C is sandwiched between the two blade portions 12 and 22, a force is applied to the workpiece C in the direction toward the base portions 11 and 21 by the concave edge portions 12b and 22b. That is, the workpiece C is drawn toward the base parts 11 and 21 between the two blade parts 12 and 22 and is sheared in a state of being substantially captured between the two blade parts 12 and 22. Therefore, since the escape at the time of cutting the workpiece C can be suppressed, the workpiece C can be efficiently cut.

  In the first embodiment, the description has been given of the mode in which the right-handed exclusive clipper blade 100 is attached to the clipper-type cutting blade device, but the present invention is not limited to this, and the left-handed clipper blade is dedicated to the left-handed. May be attached to the clipper type cutting blade device.

  FIG. 9 is a view for explaining a clipper blade 120 in which an upper blade 1 and a lower blade 2 for exclusive use of a left hand are assembled. FIG. 10 is a plan view of the upper blade 1 for left-handed use only. FIG. 11 is a plan view of the left-handed lower blade 2.

  As shown in FIGS. 9 to 11, with the left-handed dedicated clipper blade 120, the left-handed operator tends to move from left to right (that is, in a direction approaching the operator's trunk) that is gripped with the left hand. In consideration of the above, the direction of the concave edge portions 12b and 22b is determined. Thereby, a left-handed worker can perform pruning work of plants and the like more efficiently.

  Moreover, although the form which makes the upper blade 1 and the lower blade 2 reciprocate was demonstrated in the said embodiment, this invention is not limited to this, It is the form which makes the upper blade 1 or the lower blade 2 reciprocate. There may be.

  Moreover, although the blade part 12 and 22 demonstrated the form formed so that it might protrude toward the front end side from the base end side of a clipper type cutting blade apparatus in the said embodiment, this invention is limited to this. Instead, the blade portions 12 and 22 may be configured to protrude in a direction intersecting the reciprocating direction of the clipper blade. FIG. 12 is a plan view for explaining another embodiment of the clipper blade. For example, as shown in FIG. 12, the clipper blade 130 is configured to reciprocate from the proximal end side to the distal end side and from the distal end side to the proximal end side, and the blade portion so as to be substantially orthogonal to the movement direction. The form which protrudes 12 'and 22' may be sufficient. This type of clipper-type cutting blade device mainly includes a drive source (drive means) 4 ′ including a drive source such as a reciprocating engine and a crank mechanism that converts a rotary motion input from the drive source into a reciprocating motion. , A mission case 5 ′ incorporating this drive mechanism 4 ′, a clipper tool 130 composed of a long upper blade 1 ′ and a lower blade 2 ′ whose base end portions are connected to the drive mechanism 4 ′, and a clipper It is comprised by a pair of guide plate 6 'attached to mission case 5' in the state which inserted | pinched the cutter 130. FIG. Even in this form, if the concave edge portions 12b 'and 22b' are formed on the blade portions 12 'and 22' of the upper blade 1 'and the lower blade 2', the cutting efficiency can be improved.

  A cutting test of the object to be cut was performed using a clipper type cutting blade device, and the cutting efficiency was evaluated based on the number of locks of the clipper type cutting blade device and the required time when cutting a predetermined number of objects to be cut. Here, the locked state means a state in which, while the clipper blade is in operation, the object to be cut is sandwiched between the blade portions and does not reach cutting, and the operation of the clipper blade is stopped. That is, the smaller the number of times the lock state is set, the better the sharpness of the clipper blade.

(Test equipment)
Hair clipper type cutting blade device; Hitachi Koki Horticultural hair clipper (motor: power consumption 80 W, current 0.9 A, number of strokes 1250 / as body part (drive mechanism 4, housing 3, fixing member 6 in the embodiment)) min) was used. The test was conducted by replacing the main body with a clipper blade having a different blade shape. The form of each clipper blade is shown below.

Example 1; a configuration as shown in FIGS. 2, 3 and 4 (the radius of curvature of the concave edge portion 12b is 100 mm, the radius of curvature of the concave edge portion 22b is 100 mm, and the radius of curvature of the convex edge portion 12a is 35mm, the radius of curvature of the convex edge 22a is 35mm)
Example 2; a configuration as shown in FIGS. 6, 7 and 8 (the radius of curvature of the concave edge portion 12b is 100 mm, the radius of curvature of the concave edge portion 22b is 100 mm, and the radius of curvature of the convex edge portion 12a is 35mm, the radius of curvature of the convex edge 22a is 35mm)
Comparative Example 1; a configuration as shown in FIG. 13 (where concave edge portions 12b and 22b are not formed)
Objects to be cut; reeds that are generally marketed at home centers, etc. are disassembled, and 150 ridges (outer diameter: about 8-10mm) are almost upright, with a constant interval (length 14 @ 20mm, width 9 @ 54mm) Were placed side by side. The arrangement | positioning space | interval of a scissors and the advancing direction of a clipper-type cutting blade apparatus are shown in FIG.

(Test method)
Using the clipper cutter of Example 1 to cut the object to be cut 10 times, using the clipper cutter of Example 2 to cut the object to be cut 10 times, using the clipper cutter of Comparative Example 1 The trimming test of the object to be cut was performed 10 times.

  In each trimming test, the cutting time and the number of locks required to cut 150 ridges of the workpiece were measured. In each pruning test, the test was interrupted when the required time exceeded 50 seconds. In each trimming test, the time required for recovering the locked state is included in the required time to measure the cutting time.

(Test results)
The test results are shown in Table 1, Table 2, and Table 3.

  As shown in Table 1, Table 2, and Table 3, the number of locks and the cutting time of Example 1 and Example 2 are both less than the number of locks and the cutting time of Comparative Example 1, and the workpiece is efficiently cut. It is clear that

1 Upper blade (blade)
2 Lower blade (blade)
4 Drive mechanism (drive means)
11, 21 Base 12, 22 Blade 12b, 22b Concave edge 100, 110, 120, 130 Hair clipper cutter C, C1, C2, C3 Workpiece

Claims (4)

In a state where two plate-shaped blades are overlapped, at least one of the two blades is reciprocated in the surface direction, and shearing is performed by sandwiching an object to be cut between the edges of the two blades. A clipper blade,
The two blades are respectively
The base,
A blade portion protruding in a direction intersecting the reciprocating direction of the blade with respect to the base portion,
A cutting tool for clippers, wherein a concave edge portion curved in a concave shape in a plan view is formed on at least one side portion of the blade portion.   The clipper blade according to claim 1, wherein concave edge portions are formed on the plurality of blade portions, and all the concave edge portions are formed to be recessed in the same direction.   The clipper blade according to claim 1, wherein concave edge portions are formed on the plurality of blade portions, and some of the concave edge portions are recessed in a direction different from other concave edge portions. The clipper blade according to any one of claims 1 to 3,
A clipper-type cutting blade device comprising drive means connected to the base portion of the clipper cutter and reciprocally moving at least one blade in the surface direction.

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