JP2008206449A - Pruning machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pruning machine improving operability of cutting grass and trees with the pruning machine, improving a finish condition, and improving a bearing weight and operability through making a center of gravity further approach a handle. <P>SOLUTION: This pruning machine (1) comprises forming a pruning blade (3) by superposing an upper blade rod (5) and a lower blade rod (6) which form a plurality of cutting blades on both the sides, on the front of a tool body (2), and cutting an object to be cut through straightly reciprocating at least one side blade rod with a driving source held in the tool body (2). An interval (B) from a prescribed position in the length direction of both the upper blade rod (5) and the lower blade rod (6) to cutting blades (51 and 61) of both the sides of the tool body (2) is made smaller than an interval (A) from the prescribed position to cutting blades (52 and 62) of both the edges. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a trimming machine for cutting vegetation.

The cutting blades of conventional cutting machines have the same distance between the cutting edges of the upper and lower blades on both sides and in the length direction, so the thickness and hardness of the cutting material are different. In this case, there is a problem that the vegetation that has entered between the cutting blades falls down and is cut off and the cut ends are not uniform and the finished state is not good.
In addition, since the cutting blade extends long in front of the tool body, the center of gravity of the trimming machine is generated on the cutting blade side, and the operator operating with the handle provided at the rear end of the tool body causes a weight and is easily fatigued. There was a problem.

In order to solve this problem, a technique has been considered in which the blade pitch of the cutting blade on one side of the movable blade is made smaller than the blade pitch of the cutting blade on the other side. (For example, see Patent Document 1 below)
Further, the pitch interval between the left and right blade pieces of the fixed blade plate is made the same, the pitch interval of the blade piece on one side of the movable blade plate is made the same as the pitch interval of the fixed blade plate, and the pitch of the blade pieces on the other side A technique for setting the interval to 1/2, 1/3, or the like of the pitch interval of the fixed blade plate has also been considered. (For example, see Patent Document 2 below)

  However, if the blade pitch of the cutting blade on one side of the movable blade and the blade pitch of the cutting blade on the other side are different from each other as in the technique disclosed in Patent Document 1 below, There was a problem that the balance of weight was poor, and a force to tilt the mower to the left or right was generated, resulting in poor operability.

Also in the technique disclosed in Patent Document 2 below, the pitch interval of the blade piece on one side of the movable blade plate is set to 1/2, 1/3, etc. of the pitch interval of the blade piece on the other side. There was a problem that the balance of the weight on the other side worsened, and a force to tilt the mower to the left or right was generated, resulting in poor operability.
Furthermore, in any of the following Patent Documents 1 and 2, since the center of gravity position in the longitudinal direction of the fixed blade (fixed blade plate) and the movable blade (movable blade plate) is not changed, the weight is not improved. .
Japanese Utility Model Publication No. 4-41816 Japanese Utility Model Publication No. 51-58063

  The problem to be solved is to improve the workability of cutting the vegetation by the mowing machine, improve the finished state, and improve the weight and improve the operability by bringing the center of gravity position of the mowing machine closer to the handle. It is.

  The invention according to claim 1 is a cutting blade (3) in which an upper blade ridge (5) and a lower blade ridge (6) in which a plurality of cutting blades are formed on both sides are superimposed on the front portion of the tool body (2). In the trimming machine (1) that cuts the workpiece by linearly reciprocating at least one of the blades with a drive source housed in the tool body (2), the upper blade (5) and the lower blade The distance (B) between the cutting edges (51, 61) on both sides on the tool main body side (2) from the predetermined positions in the length direction of both (6), and the cutting edges (52, 62) on both sides on the tip side from the predetermined positions. ) Interval (A).

  The invention according to claim 2 is the trimming machine according to claim 1, wherein the position of the cutting blades (51, 52, 61, 62) of the upper blade rod (5) and the lower blade rod (6) is determined by the upper blade rod. (5) When the cutting blades (51, 61) on the tool body (2) side are in a position where they overlap each other from a predetermined position in the length direction of both the lower blade rod (6), The cutting blades (52, 62) are characterized in that each cutting blade of one blade rod is positioned between the cutting blades of the other blade rod.

  According to a third aspect of the present invention, in the trimming machine according to the first and second aspects, the tool body (2) side from the predetermined positions in the length direction of both the upper blade rod (5) and the lower blade rod (6). The interval (B) between the cutting edges (51, 61) is set to ½ of the interval (A) between the cutting edges (52, 62) on the tip side from a predetermined position.

According to the first aspect of the present invention, the cutting can be done on the tool body from the predetermined position in the length direction of the cutting blade composed of the upper blade and the lower blade, and rough cutting can be performed on the tip side. Workability is improved and the finished state is improved.
In addition, the number of cutting blades on the tool body side of the cutting blade increases, the weight on the tool body side becomes heavier than the weight on the tip side from a predetermined position in the length direction of the cutting blade, and the center of gravity position of the entire cutting machine is more handle The weight is improved and the operability is improved.

  According to the invention of claim 2, the number of cutting timings on the tool body side from the predetermined position in the length direction of the cutting blade composed of the upper blade rod and the lower blade rod is larger than the number of cutting timings on the tip side. Therefore, on the tool main body side of the cutting blade, as compared with the cutting blade on the tip end side, more reciprocating movement of the upper blade hook and the lower blade hook can cut more vegetation, and workability is further improved.

  According to the invention of claim 3, the number of cutting timings on the tool main body side of the cutting blade is more than twice the cutting timing on the tip side by one reciprocating movement of the upper blade rod and the lower blade rod. The cutting blade can cut more vegetation on the tool body side, and the workability is further improved.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a plan view of a trimming machine according to an embodiment of the present invention. FIG. 2 is a plan view of the cutting blade of the cutting machine according to the embodiment of the present invention, and is a view showing the configuration of the cutting blade on one side of the cutting blade.

  As shown in FIG. 1, the trimming machine 1 of the present invention includes a cutting blade 3 for cutting plants on the tip side (right side in the figure) of the tool body 2, and an operator attaches the trimming machine 1 to the rear side. A handle 4 for holding is integrally provided. A motor (not shown) that is a drive source for driving the cutting blade 3 is housed inside the tool body 2.

  The cutting blade 3 moves the upper blade 5 and the lower blade 6 formed with a plurality of cutting blades 51, 52, 61, 62 on both sides (up and down direction in FIG. 1) up and down (perpendicular to the paper surface in FIG. 1). And is supported by a blade pressing plate 7 and a blade fixing plate (not shown).

  As shown in FIG. 2 (the cutting blade on the other side is not shown), the upper and lower blades 5 and 6 constituting the cutting blade 3 are connected to an output shaft of a motor which is a driving source (not shown). Engage with the cam 8 and perform linear reciprocation by rotation of the cam 8. The cam 8 is composed of two eccentric cams 8a and 8b which are arranged vertically and symmetrically in the vertical direction in FIG. 2 and are integrally formed so as to overlap vertically with the paper surface of FIG. The hole 53 of the upper blade rod 5 is engaged with one eccentric cam 8a, and the hole 63 of the lower blade rod 6 is engaged with the other eccentric cam 8b. As the cam 8 rotates, the upper and lower blades 5 and 6 perform linear reciprocating motions in different directions to cut the plants that have entered between the cutting blades 51, 52, 61, and 62.

In the present embodiment, since the cam 8 rotates to the right around the center point O from the state in which the cutting blade 3 shown in FIG. 2A starts cutting, the upper blade rod 5 moves to the left in the figure, and the lower blade rod 6 moves straight in the right direction by the amount of eccentricity a, and cuts the vegetation that has entered between the cutting blades 51, 52, 61, 62 of the upper and lower blades 5,6.
FIG. 2B shows a state where the cam 8 is rotated by 180 degrees from the state of FIG. When the cam 8 further rotates to the right from the state in which the cutting blade 3 starts cutting, the upper blade rod 5 moves linearly in the right direction in the figure and the lower blade rod 6 moves in the left direction in the drawing by the eccentric amount a. Cut the vegetation that has entered between the cutting edges 51, 52, 61, 62 of the scissors 5, 6.
In this way, by one rotation of the cam 8, the upper and lower blades 5, 6 are each cut once for going and returning.

Next, the structure of the cutting blades 51, 52, 61, 62 of the upper and lower blades 5, 6 constituting the cutting blade 3 of the present embodiment will be described with reference to FIG.
As shown in this figure, the cutting blade 3 has an interval B between the cutting blade 51 and the cutting blade 61 located on the tool body 2 side from the approximate center in the length direction of the upper and lower blades 5 and 6 from the approximate center. The distance A between the cutting edge 52 and the cutting edge 62 located on the distal end side is ½, and further, the distance B between the cutting edge 51 and the cutting edge 61 and the eccentric amount a of the eccentric cams 8a and 8b have the same dimensions. Forming.
The number of the cutting blades 51 located on the tool body 2 side from the approximate center in the length direction of the upper cutter bar 5 is nine, and the cutting blade 52 located on the tip side from the approximate center is formed in five. The number of the cutting blades 61 located on the tool body 2 side from the approximate center in the length direction of the lower blade rod 6 is eight, and the number of the cutting blades 62 positioned on the tip side from the approximate center is four. Yes.
Further, the upper and lower blades 5 and 6 constituting the cutting blade 3 are configured symmetrically in the vertical direction in the drawing as shown in FIG.

  Further, as shown in FIG. 2 (a), the positions at which the cutting blades 51, 52, 61, 62 of the upper and lower blades 5, 6 start cutting are the lengths of the upper and lower blades 5, 6 respectively. In the cutting blades 51 and 61 on the tool body 2 side from the approximate center in the vertical direction, the upper edge of the cutting edge 51 of the upper cutting edge 5 and the cutting edge 61 of the lower cutting edge 6 completely overlap each other. In the cutting blade 52 of the cutting blade 5 and the cutting blade 62 of the lower cutting blade 6, the cutting blade 62 of the lower cutting blade 6 is positioned at the center between the cutting blades 52 of the upper cutting blade 5.

With this configuration, the distance between the cutting blade 51 and the cutting blade 61 of the upper and lower blades 5 and 6 of the cutting blade 3 of the present invention and the distance between the cutting blade 52 and the cutting blade 62 is the length direction of the upper and lower blades 5 and 6. From the approximate center, the distance between the cutting edge 51 and the cutting edge 61 on the tool body 2 side is the distance c, and the distance between the cutting edge 52 and the cutting edge 62 on the tip side is the distance d.
The interval c is such that each interval B between the cutting blade 51 and the cutting blade 61 and the eccentric amount a of the eccentric cams 8a and 8b are formed in the same dimension, and the cutting is started as shown in FIG. In the cutting blades 51 and 61 on the tool body 2 side from the approximate center in the length direction of the upper and lower blades 5 and 6, both positions are the cutting blade 51 of the upper blade 5 and the cutting blade 61 of the lower blade 6. Are completely overlapped with each other, and therefore have the same dimensions as the intervals B between the cutting blade 51 and the cutting blade 61.
Further, the distance d is such that the distance A between the cutting edge 52 and the cutting edge 62 located on the tip side is twice the distance B between the cutting edge 51 and the cutting edge 61, as shown in FIG. Both of the positions for starting cutting are the cutting blade 52 of the upper blade 5 and the cutting blade 62 of the lower blade 6 on the tip side. The cutting blade 62 of the lower blade 6 is the cutting blade of the upper blade 5. Since it is located in the center between 52, it becomes 1/2 of each space | interval A of the said cutting blade 52 and the cutting blade 62, and has the same dimension as each space | interval B of the cutting blade 51 and the cutting blade 61. FIG. That is, the interval c and the interval d have the same dimensions.

As described above, in the present invention, the number of cutting blades 51 and 61 from the approximate center in the length direction of the cutting blade 3 including the upper blade 5 and the lower blade 6 on the tool body 2 side is the cutting edge on the tip side. Compared with the blades 52 and 62, the blades 51 and 52 are formed symmetrically on both sides of the upper and lower blades 5 and 6, so that the cutting blades 51 on both sides of the cutting blade 3, In addition to the good weight balance of 52, 61, 62, on the tool body 2 side from the approximate center in the length direction of the cutting blade 3, the number of cutting timings is greater than the number of cutting timings on the tip side. Since the tool body 2 side is more than twice the 4 times on the tip side, finishing cutting can be done on the tool body 2 side, while rough cutting can be done on the tip side, cutting the vegetation. Improves the finished state.
Further, the cutting blade 3 on the tool body 2 side can cut more vegetation by one reciprocating movement than the tip side, further improving the efficiency of cutting work and improving workability.
Furthermore, since the number of cutting blades 51 and 61 on the tool body 2 side of the cutting blade 3 is larger than that on the tip side, the weight on the tool body 2 side from the approximate center in the length direction of the cutting blade 3 is on the tip side. Since it becomes heavier than the weight, and the center of gravity position of the entire trimming machine 1 approaches the handle 4, the weight when the operator holds the handle 4 is improved and the operability is improved.

Further, in this embodiment, as shown in FIG. 2 (b), when the upper and lower blades 5 and 6 move in the opposite direction to the case of FIG. The distances c and d between the blade 51 and the cutting blade 61 and between the cutting blade 52 and the cutting blade 62 are the same as those in FIG. 2A, and the cutting timing and the number of cutting timings are the same.
Therefore, since the cutting load does not fluctuate between the return and return of the upper and lower blades 5 and 6 in the linear reciprocating motion, vibration unevenness does not occur and the operability is improved.

  In the above embodiment, the cutting blades 51 and 61 having a small interval are formed on the tool body 2 side from the approximate center in the length direction of the cutting blade 3 composed of the upper blade rod 5 and the lower blade rod 6. In a trimming machine that places importance on cutting, the cutting blades 51 and 61 having a small interval may be formed from the approximate center of the cutting blade 3 to the tip side. On the other hand, in a trimming machine that places importance on rough cutting, the cutting edges 51 and 61 having a small interval are reduced, and the cutting edges 52 and 62 having a large interval are formed from the approximate center of the cutting blade 3 to the tool body 2 side. May be.

It is a top view of the trimming machine of the Example of this invention. It is a top view which shows the structure of the cutting blade of the trimming machine of the Example of this invention.

Explanation of symbols

1 Cutting machine 2 Tool body 3 Cutting blade 4 Handle 5 Upper blade rod 6 Lower blade rod 51, 61 Cutting blade 52, 62 Cutting blade

Claims (3)

  At the front of the tool body, upper and lower blades with multiple cutting edges formed on both sides are overlapped to form a cutting blade, and at least one of the blades is straightened by a drive source stored in the tool body. In a trimming machine that reciprocates and cuts the workpiece, the distance between the cutting edges on both sides of the tool body from the predetermined position in the length direction of both the upper and lower blades is set to both sides on the tip side from the predetermined position. A trimming machine characterized in that it is smaller than the interval between the cutting edges.   2. The trimming machine according to claim 1, wherein the cutting edges of the upper and lower cutting edges are aligned with each other such that the cutting edges on the tool body side are vertically aligned from predetermined positions in the length direction of both the upper and lower cutting edges. A trimming machine characterized in that, in a cutting position on the tip side from a predetermined position, each cutting blade of one blade rod is positioned between the cutting blades of the other blade rod when in the overlapping position.   3. The trimming machine according to claim 1, wherein an interval between the cutting edge on the tool body side from a predetermined position in the length direction of both the upper blade ridge and the lower blade ridge is set, and an interval between the cutting edge on the tip side from the predetermined position is set. A trimming machine characterized by halving.

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