JP6343211B2 - Cord retainer for brush cutter - Google Patents

Description

  The present invention relates to a cord cutter for a brush cutter used in a cord type brush cutter that trims an object to be trimmed such as weeds by rotating a cord.

  A brush cutter is generally provided with a handle, a handle provided at the base end of the handle, and a cutting blade provided at the tip of the handle. In a cord type brush cutter in which a cord serves as a cutting blade, a cord holding device for holding the cord is attached so as to be rotatable with respect to the tip of the handle. Only the end of the cord is drawn out of the cord holding device, and the other part of the cord is wound inside the cord holding device. When the cord holding device is driven to rotate, the end portion of the cord rotates while being stretched by the centrifugal force, and trims the object to be trimmed. If the sharpness of the end of the cord that becomes the cutting blade decreases or the end of the cord is damaged during repeated use, the portion of the cord that is wound inside the cord holding device is cut off. Unwind a part and pull it out of the cord holding device. Various types of cord holding devices having such functions have been proposed so far.

  For example, FIG. 2 of Patent Document 1 shows an inner trunk (inner trunk 14) for winding a cord (nylon cord 3) and an outer trunk for covering the outer periphery of the cord wound around the inner trunk. And a bottom portion (circular bottom plate 11) connecting the lower end of the inner torso and the lower end of the outer torso, and the end of the cord wound around the inner torso is connected to the outer torso A cord holding device (cord holding device X) in which a cord outlet (insertion hole 16) for pulling out to the outside is provided in the outer trunk portion is described. The cord holding device of the same document winds the cord around the inner trunk through an opening above the gap (gap 4) formed in an annular shape between the outer circumference of the inner trunk and the inner circumference of the outer trunk. It is supposed to be.

  However, in the brush cutter cord holding device of the cited document 1, a work of winding a new cord around the inner trunk portion and pulling out an end thereof to the outside of the outer trunk portion (hereinafter, this work is referred to as “cord attaching work”). .) Or cutting off the end of the old cord and unwinding a part of the cord wound around the inner trunk and pulling it out of the outer barrel to create a new cutting blade (the end of the cord) When this work (hereinafter referred to as “code end switching work”) is performed, it is necessary to pass the leading end of the cord from the inside to the outside of the cord outlet. For this reason, the cord holding device of the same document is very troublesome for the cord attaching work and the cord end switching work. The reason for this is that since the cord that becomes the cutting blade is generally about 2 to 3 mm in diameter, even if it is made of a flexible material such as nylon, the cord itself is somewhat This is because it is difficult to draw a finger or the like in the gap.

  In view of such a situation, in FIGS. 1 to 4 of the cited document 2, an inner trunk part (core part 2), an outer trunk part (rise wall part 4), a bottom part (bottom plate part 3), and In addition to the outer flange portion (cord base portion 5) protruding outward from the upper end of the outer trunk portion, and the end portion of the cord wound around the inner trunk portion is connected to the outer trunk portion. For a brush cutter provided with a cord outlet (cord receiving portion 6a) for drawing out the outside of the portion and a slit (cord outlet / outlet portion 6c) for introducing the cord from the outer peripheral edge of the outer collar portion to the cord outlet A cord holding device (rotary cutter 1) has been proposed. As a result, the end of the cord can be pulled out from the cord outlet without passing the tip of the cord from the inside of the cord outlet to the outside. It becomes possible to carry out easily.

  However, the cord holding device for a brush cutter of the cited document 2 is provided with a cord drawing outlet in an outer flange portion substantially perpendicular to the rotation axis, and an end portion of the cord from the upper side to the lower side of the cord drawing outlet. Was supposed to be passed. For this reason, the end portion of the cord drawn out from the cord drawing outlet once swells downward and then spreads outward. Therefore, the brush cutter cord holding device of the cited document 2 can only properly trim the object to be brushed within a certain distance. Further, in the cord holding device for a brush cutter of Cited Document 2, the edge around the cord outlet in the outer collar portion abuts not only on the side surface of the cord but also on the upper surface, so that the cord is damaged during the brush cutting operation. There was also a problem that it was easy.

  Further, since the outer end of the cord drawing outlet is opened, the cord holding device for the brush cutter of the cited document 2 is held by the cord drawing outlet when the cord at the time of cutting receives an impact from the object to be cut. There was a possibility that the cord that had been moved would move in the forward direction of the rotation of the cord retainer for the brush cutter and come out of the cord outlet. When the end portion of the cord is pulled out from the cord outlet, the cord end portion is difficult to spread, and the object to be trimmed cannot be properly trimmed.

Noto 3117387 Noto 3174660 gazette

  The present invention has been made to solve the above-described problems, and not only can the cord attachment work and the cord end switching work be easily performed, but also has a wide range in which the object to be trimmed can be appropriately trimmed. Further, the present invention provides a cord retainer for a brush cutter that does not easily damage the cord. It is also an object of the present invention to provide a cord holding device for a brush cutter that can keep a mowing object suitably cut off, even if the cord receives an impact from the mowing object, and the cord does not easily come out of the cord outlet. It is.

  The above-described problem is a cord holding device for a brush cutter used in a cord type brush cutter that trims an object to be trimmed by rotating a cord, the inner trunk portion for winding the cord, and the inner trunk portion It has an outer body for covering the outer periphery of the wound cord, and a bottom connecting the lower end of the inner body and the lower end of the outer body, and the end of the cord wound around the inner body is A cord holding device for a brush cutter, wherein a cord drawing outlet for pulling out to the outside of the trunk portion is provided in the outer trunk portion, and an upper end of the cord drawing outlet is an open end reaching the upper end of the outer trunk portion. It is solved by providing. The cord holding device for a brush cutter of the present invention has an outer flange portion that protrudes outward from the upper end of the outer trunk portion, and a slit that reaches the cord outlet from the outer peripheral edge of the outer flange portion is provided in the outer flange portion. It can also be.

  Thus, by providing the cord outlet in the outer body portion, the end of the cord can be drawn out from the cord outlet in the horizontal direction (direction perpendicular to the rotation axis of the cord holding device for the brush cutter). It becomes possible. For this reason, when the cord retainer for the bush cutter is rotated, the cord pulled out from the cord outlet is in a horizontal state from the cord outlet to its tip, and the object to be trimmed near the cord holder for the bush cutter It is possible to cut off also suitably. Also, in the vicinity of the cord outlet, only the side surface of the cord facing the reverse direction of the rotation (rotation of the cord cutter cord holding device) abuts the outer trunk portion, and the edge of the outer trunk portion is on the upper surface of the cord. Since it does not contact, it becomes possible to make the cord difficult to be damaged during the brushing operation. Furthermore, the upper end of the cord outlet is an open end that reaches the upper end of the outer body portion, so that a midway portion of the cord can be inserted into the cord outlet from the open end. For this reason, it is possible to pull out the cord from the cord outlet without passing the tip of the cord from the inside to the outside of the cord outlet.

  In the cord holding device for a brush cutter according to the present invention, the cord pressing means for pressing the end portion of the cord drawn from the cord drawing outlet to the outside of the outer body portion from the upper side so as not to come out from the cord drawing outlet. It is also preferable to comprise. This makes it possible to prevent the cord from coming out of the open end of the cord outlet even when the cord at the time of trimming receives an impact from the object to be trimmed. Therefore, it becomes possible to continue cutting appropriately even for an object with high resistance.

  The cord pressing means is not particularly limited in its specific form as long as the above-described effects are exhibited. Examples of the form of the cord pressing means include a bar shape, a plate shape, a block shape, or a combination of these. In addition, the cord pressing means can be rotated between a closed position traversing the open end side of the cord drawing outlet and an open position rotated downward from the closed position, like a lever of a slug hook. The lever is pivotally supported around the cord outlet and the biasing means for biasing the lever to the closed position. When a force is applied downward from the upper side of the lever in the closed position, the lever moves to the open position. It is also possible to adopt a structure in which the lever does not move from the closed position when it is moved and a force is applied upward from the lower side of the lever in the closed position. However, when the cord pressing means has a structure having such a movable portion, the mechanism becomes complicated, which causes an increase in the manufacturing cost of the cord cutter for the brush cutter.

  For this reason, it is preferable that the cord pressing means is realized by a structure having no movable part. For example, the cord pressing means is a rod-like piece arranged across the cord outlet at a position spaced inward from the inner peripheral surface of the outer trunk portion, and one end of the rod-like piece is connected to the cord pulling portion. It is preferable that the form is interrupted near the outlet. Further, the cord pressing means is a rod-like piece arranged across the upper side of the cord outlet at a position spaced a predetermined distance inward from the inner peripheral surface of the outer trunk portion, and one end portion of the rod-like piece is It is also preferable that the form is interrupted near the cord outlet. At this time, the bar-shaped piece is provided so as to be inclined with respect to a plane perpendicular to the rotation axis of the brush cutter cord holding device, and the one end portion of the bar-shaped piece is more than the other end portion of the bar-shaped piece. Higher is preferable. Further, the rod-like piece is formed to be curved in an arc shape in plan view, and the distance from the inner peripheral surface of the outer body portion to the rod-like piece is from the one end portion to the other end portion of the rod-like piece. It is preferable to shorten the length as the time elapses. As a result, it is possible to prevent the end of the cord held in the cord outlet from floating and coming out of the open end while preventing the cord pressing means from becoming an obstacle when the cord is inserted into the cord outlet. become.

  At this time, it is also preferable to form a rising portion that rises in a direction substantially parallel to the rotation axis between the one end portion and the other end portion of the rod-shaped piece. In this case, the upright portion is arranged so as to be in the vicinity of the cord drawing outlet. Thereby, when rotating the bush cutter cord holding device, it is possible to support the vicinity of the base of the cord drawn out from the cord outlet with the upright portion. When the brush cutter cord holding device is rotated, due to the inertia of the rotation, the cord pulled out from the cord drawing outlet is moved to one edge of the cord drawing outlet (rear relative to the rotation direction of the cord cutter cord holding device). The cord may be damaged, but by supporting the vicinity of the base of the cord drawn from the cord outlet with the upright part, it is possible to make the cord difficult to hit the edge at the cord outlet become. Further, even when the bush cutter cord holding device is rotated for a long time, it is possible to prevent the vicinity of the base of the cord from being sandwiched between the bar-like piece (the cord pressing means) and the bottom. When forming an upright part, the part on the one end side and the part on the other end side of the upright part of the rod-like piece are bent in a square shape in plan view. Is also preferable. Moreover, it is also preferable to provide the portion on the one end side of the upright portion of the rod-shaped piece so as to be inclined with respect to a plane perpendicular to the rotation axis. Thus, as in the case described above, the end of the cord held by the cord outlet is lifted and pulled out from the open end while preventing the cord pressing means from being an obstacle when the cord is inserted into the cord outlet. Can be prevented.

  In the cord holding device for a brush cutter according to the present invention, the cord outlet may be provided such that the center line in the width direction is parallel to the rotation axis, but is provided inclined with respect to the rotation axis. It is preferable that the cord held at the outlet is guided to the lower end of the cord outlet when rotating. As a result, when the cord retainer for brush cutter rotates, the portion of the cord held by the cord outlet is less likely to move to the open end side, and the cord can be further prevented from coming out of the cord outlet. Become.

  Moreover, in the cord holding device for a brush cutter according to the present invention, it is preferable that the outer trunk portion at the side end portion of the cord drawing outlet is formed in a rounded cross section. As a result, the contact area between the outer body portion and the cord at the side end portion of the cord drawing outlet is increased so that a local force is not applied to the cord, and the cord has a smooth cross-sectional portion. It is possible to slip and prevent the cord from bending at a steep angle.

  As described above, according to the present invention, not only can the cord attaching operation and the cord end switching operation be easily performed, but also a brush cutter with a wide range in which the object to be trimmed can be suitably trimmed and the cord is not easily damaged. It is possible to provide a cord holding device. In addition, it is possible to provide a cord holding device for a brush cutter that can keep the mowing object properly cut, since it is difficult for the cord to come out of the cord outlet even when the cord receives an impact from the mowing object.

It is a top view of the cord holding device for brush cutters concerning the present invention. It is a side view of the cord holding device for brush cutters concerning the present invention. It is sectional drawing which showed the state cut | disconnected by the AA surface shown in FIG. The use brushcutter code holding device according to the ends of the cord wound around the inner barrel to the invention pulled out from the cord outlets is a perspective view showing by cutting along a plane including the rotational axis L _1. It is the top view which showed the cord holding | maintenance apparatus for brush cutters which concerns on this invention of the state which pulled out the edge part of the code | cord | wound wound around the inner trunk | drum from the cord drawing outlet. It is the enlarged view which showed the state which looked at the circumference | surroundings of the cord drawing outlet when the cord holding device for brush cutters concerning this invention is rotating from the direction of the arrow b shown in FIG. It is a top view of the cord holding device for brush cutters of other embodiments concerning the present invention. FIG. 8 is a perspective view showing a state in which an end portion of a cord wound around an inner trunk portion in the brush cutter cord holding device in FIG. 7 is pulled out from a cord drawing outlet, cut along a plane including the rotation axis L ₁ . It is the top view which showed the state which pulled out the edge part of the code | cord | wound wound by the inner trunk | drum part from the code | cord | chord extraction outlet in the cord holding device for brush cutters of FIG. It is the figure which showed the state which looked at the cord pressing means in the cord holding device for brush cutters of FIG. 7 from the side. It is the perspective view which expanded and showed the periphery of one edge (Rear edge with respect to the rotation direction of the brush cutter cord holding device) in the cord outlet in the cord holding device for brush cutter of FIG.

[Outline of cord retainer for brush cutter]
A preferred embodiment of the cord cutter cord holding device according to the present invention will be described more specifically with reference to the drawings. A cord cutter for a brush cutter according to the present invention is for holding a cord in a cord type brush cutter that trims an object to be trimmed by rotating the cord. In the present embodiment, as shown in FIGS. 1 to 3, the cord retaining device 10 for a brush cutter includes an inner trunk portion 11, an outer trunk portion 12, a bottom portion 13, an upper retaining portion 14, and an outer collar portion 15. The cord pressing means 16 is provided. FIG. 1 is a plan view of a brush cutter cord holding device 10 according to the present invention. FIG. 2 is a side view of the brush cutter cord holding device 10 according to the present invention. FIG. 3 is a cross-sectional view showing a state in which the brush cutter cord holding device 10 according to the present invention is cut along a plane AA shown in FIG. 1.

  In the present embodiment, in consideration of strength, all of the inner body part 11, the outer body part 12, the bottom part 13, the upper retaining part 14, the outer collar part 15, and the cord pressing means 16 are formed of metal. The material of each part constituting the brush cutter cord holding device 10 is not particularly limited as long as it has a required strength, and materials other than metal, such as hard resin, can be used. The material can be switched depending on the location, for example, only the cord pressing means 16 is formed of a hard resin. Moreover, in this embodiment, the inner trunk | drum 11, the outer trunk | drum 12, the bottom part 14, and the outer collar part 15 are integrally formed by giving a press work to one metal plate, and upper side securing part 14 is integrated with other parts by welding a metal plate separate from the inner body part 11 to the inner body part 11, but the method for forming the cord holding device 10 for the brush cutter is as follows. Without being limited to the above, various methods can be employed.

  Hereinafter, each part which comprises the cord holding device 10 for brush cutters of this embodiment is demonstrated in order.

[Inner trunk]
As shown in FIG. 4, the inner trunk portion 11 is a portion for winding the cord 20. Figure 4 shows by cutting the brushcutter code holding device 10 in a state where the end portion is drawn out from the code extraction port 12a of the cord 20 which is wound around the inner body portion 11 in a plane including the rotational axis L ₁ perspective FIG. In this embodiment, the inner barrel 11 has a cylindrical cross-sectional shape of the inner barrel 11 (the shape of the cross section perpendicular to the rotation axis L ₁₎ has a circular shape. However, as long as the cord 20 can be wound around the outer peripheral portion, the cross-sectional shape of the inner trunk portion 11 is not limited to a circular shape. The cross-sectional shape of the inner trunk portion 11 may be a polygon such as a triangle or a quadrangle, or may be an ellipse. Moreover, the inner trunk part 11 can also be configured by combining a plurality of columnar bodies.

[Outer trunk]
As shown in FIG. 4, the outer body portion 12 is a portion for covering the outer periphery of the cord 20 wound around the inner body portion 11. In the present embodiment, the outer body portion 12 has a cylindrical shape having an inner diameter larger than the outer diameter of the inner body portion 11. An annular gap α is formed between the inner circumferential surface of the outer trunk portion 12 and the outer circumferential surface of the inner trunk portion 11, and the cord 20 can be wound around the inner trunk portion 11 through the opening above the gap α. I am doing so. As shown in FIG. 3, the outer trunk portion 12 is formed lower than the inner trunk portion 11. Thereby, it is possible to easily wind the cord 20 around the inner trunk portion 11. Similarly the inner barrel 11, the cross-sectional shape of the outer barrel 12 (the shape of the cross section perpendicular to the rotation axis L ₁₎ may be employed without being limited to a circle, a variety of shapes.

As shown in FIG. 4, the outer trunk portion 12 is provided with a cord outlet 12 a for pulling out the end portion of the cord 20 to the outside of the outer trunk portion 12. Code outlets 12a draws the outer barrel 12 penetrating in and out is provided by the ends of the wound code 20 on the inner barrel 11 in the horizontal direction (direction perpendicular to the rotation axis L ₁₎ Be able to. Therefore, rotating the brush cutter code holding device 10 around the rotation axis L _1, the ends of the cord 20 pulled out to the outside of the outer barrel 12 from the code extraction port 12a is widened in the clean horizontally Thus, it is possible to clean a wide range of objects to be trimmed.

  As shown in FIG. 4, the cord outlet 12a is provided over a range from the middle in the height direction of the outer trunk 12 to the upper end of the outer trunk 12, and the upper end of the cord outlet 12a is , Has become an open end. Therefore, even if the end of the cord 20 is not passed from the inner side to the outer side of the cord outlet 12a, the cord 20 can be inserted into the cord 20 from the cord outlet 12a only by inserting the end of the cord 20 downward from above the cord outlet 12a. The end portion can be pulled out. In addition, since the upper end of the cord outlet 12a is an open end, the outer trunk portion 12 does not come into contact with the upper surface of the cord 20 at the portion of the cord 20 held by the cord outlet 12a. When cutting the object to be paid, the cord 20 around the cord outlet 12a can be made less likely to be damaged.

FIG. 6 is an enlarged view showing a state in which the periphery of the cord outlet 12a when viewed from the direction of the arrow b shown in FIG. 5 when the brush cutter cord holding device 10 is rotating. Code outlets 12a, as already mentioned, but the widthwise center line may be provided so as to be parallel to the rotation axis L _1, in the present embodiment, as shown in FIG. 6, the code argument widthwise center line L ₂ of the outlet 12a is tilted with respect to the rotation axis L _1, as code 20 held by the code extraction port 12a is guided to the lower end of the cord pull-out port 12a at the time of rotation Yes. The inclination angle of the widthwise center line _{L 2} codes outlets 12a relative to the rotational axis _{L 1} theta preferably when about 3 to 45 °, and more preferably, about 5 to 30 °.

  The cord outlet 12a is formed by punching or cutting the outer body portion 12. The outer trunk portion 12 at the side end portions β and γ of the cord outlet 12a shown in FIG. 6 (boundary portion between the outer trunk portion 12 and the cord outlet 12a) may be left open. The cord 20 may locally contact the edges of the side end portions β and γ, and the cord 20 may be bent at a steep angle or the cord 20 may be damaged. For this reason, it is preferable that the side end portions β and γ that may come into contact with the cord 20 have a rounded cross-sectional shape without an edge. As a result, the contact area between the outer body portion 12 and the cord 20 at the side end of the cord outlet 12a is increased so that no local force is applied to the cord 20, and the cord has a rounded cross section. It is possible to prevent the cord 20 from being bent at a steep angle.

  In this embodiment, of the pair of side end portions β and γ of the cord outlet 12a shown in FIG. 6, the side end portion β that is the downstream side of the rotation is from the outer side of the outer body portion 12 to the inner side (in FIG. By pressing toward the front side of the paper surface, a rounded cross-section is formed, and the side end γ that is the upstream side of the rotation is from the inner side to the outer side of the outer body portion 12 (the back side of the paper surface in FIG. 6). It is formed in a cross-sectional round shape by pressing toward the surface. As a result, not only when the cord 20 is in contact with the side end portion β, but also when the cord 20 is in contact with the side end portion γ due to impact from the object to be cut, the above-mentioned An effect can be suitably obtained.

  The number of the cord outlets 12a provided in the outer trunk portion 12 is not particularly limited, and may be one. However, when the cord outlets 12a are provided at a plurality of locations, both ends of one cord 20 wound around the inner trunk portion 11 are pulled out to the outside of the outer trunk portion 12, or a plurality of cords wound around the inner trunk portion 11 are provided. It is possible to pull out the respective end portions of the cord 20 to the outside of the outer body portion 12, and it is possible to more efficiently trim the object to be trimmed. It is also possible to pull out the cord 20 from the cord outlet 12a where the cord 20 can be easily pulled out. For this reason, it is preferable to provide two or more cord outlets 12a. The number of cord outlets 12a is more preferably 3 or more, and even more preferably 4 or more. However, if the number of the cord outlets 12a is excessively large, dust or the like may easily enter the inside of the outer trunk portion 12, or the strength of the outer trunk portion 12 may be reduced. For this reason, the number of the cord outlets 12a is usually 10 or less.

When a plurality of code outlets 12a, each code outlets 12a may be provided in a rotationally symmetric manner with respect to the rotation axis L ₁ of the bush cutter cord retention device 10 preferably. In this embodiment, as shown in FIG. 5, four cord outlets 12 a are provided at positions that are 90 ° rotationally symmetric with respect to the rotation axis L ₁ of the bush cutter cord holding device 10. FIG. 5 is a plan view showing the cord holding device 10 for a brush cutter in a state in which the end of the cord 20 wound around the inner trunk portion 11 is pulled out from the cord outlet 12a.

[bottom]
As shown in FIG. 3, the bottom portion 13 is a portion that connects the lower end of the inner trunk portion 11 and the lower end of the outer trunk portion 12. The bottom portion 13 not only supports the outer trunk portion 12 on the outer peripheral portion of the inner trunk portion 11, but also prevents the cord 20 wound around the inner trunk portion 11 from falling off (lower) It also functions as a side retaining part). The bottom portion 13 may have a form having an opening in a part thereof. In this case, the bottom portion 13 is disposed through the opening in the gap α between the outer peripheral surface of the inner trunk portion 11 and the inner peripheral surface of the outer trunk portion 12. There is a risk that (a trimmed object to be trimmed) enters. For this reason, in this embodiment, the bottom part 13 is formed in a continuous surface shape that completely closes the space between the lower end of the inner body part 11 and the lower end of the outer body part 12.

[Upper retaining part]
As shown in FIG. 4, the upper retaining portion 14 is a hook-shaped portion that protrudes outward from the upper end of the inner trunk portion 11. The upper retaining portion 14 prevents the cord 20 wound around the inner trunk portion 11 from falling off upward. In the present embodiment, the upper retaining portion 14 functions as a fixing portion for fixing the cord cutter cord holding device 10 to the cord type brush cutter. That is, the upper retaining portion 14 is provided with a fixing hole 14a. By passing a fixing tool such as a bolt upward from the lower side of the fixing hole 14a, the cord retainer for a brush cutter 10 is attached to the cord type brush cutter. It can be fixed to the rotating part. As long as the upper retaining portion 14 can exhibit the above function, the form thereof can be changed as appropriate.

[Outer part]
As shown in FIG. 4, the outer flange portion 15 is a portion that protrudes outward from the upper end of the outer trunk portion 12. The outer collar portion 15 holds down the end of the cord 20 that has bounced up for some reason when the object to be trimmed is being cut away, thereby preventing the cord 20 from being caught in the cord type brush cutter. The outer flange portion 15 is provided with a slit 15a that reaches the cord outlet 12a from the outer peripheral edge of the outer flange portion 15. In this manner, by providing the slit 15a in the outer collar portion 15, the end portion of the cord 20 can be inserted from the cord outlet 12a only by inserting the end portion of the cord 20 downward from above the cord outlet 12a and the slit 15a. It can be brought out.

Slit 15a may be provided in a direction perpendicular to the rotational axis L ₁ of the bush cutter cord holding device 10, but in the present embodiment, as shown in FIG. 5, formed by inclined slits 15a Thus, the outer end portion of the slit 15 is displaced from the inner end portion of the slit 15 toward the forward direction “a” of the rotation of the cord cutter cord holding device 10. Thereby, when the brush cutter cord holding device 10 rotates in the forward direction a, it is possible to make it difficult for the end portion of the cord 20 pulled out from the cord outlet 12a to be pulled out upward from the slit 15a.

[Code pressing means]
As shown in FIG. 4, the cord pressing means 16 presses the end portion of the cord 20 drawn from the cord outlet 12a to the outside of the outer body portion 12 from the upper side so as not to come out from the cord outlet 12a. It is a part to do. In this embodiment, the cord pressing means 16 is constituted by a bar-like piece arranged across the cord outlet 12a at a position spaced a predetermined distance inward from the inner peripheral surface of the outer trunk portion 12. The base end portion 16a of the rod-shaped piece 16 is a fixed end fixed to the lower part of the inner peripheral surface of the outer trunk portion 12 or the upper surface edge of the bottom portion 13, and the tip end portion 16b of the rod-shaped piece 16 is the cord outlet 12a. The free end was interrupted in the vicinity. For this reason, the end part of the cord 20 can be easily held by the cord outlet 12a by being moved toward the cord outlet 12a from the tip end 16b side of the rod-like piece 16.

Further, in this embodiment, the rod-like piece 16 is provided in a state inclined with respect to a plane perpendicular to the rotation axis L ₁ , and the distal end portion 16 b of the rod-like piece 16 is more than the base end portion 16 a of the rod-like piece 16. Also try to be a high position. In addition, as shown in FIG. 5, the rod-like piece 16 is formed to be curved in a circular arc shape in plan view, and as the tip end portion 16 b of the rod-like piece 16 becomes the base end portion 16 a, The distance from the peripheral surface to the rod-shaped piece 16 is shortened. By adopting these configurations, the end of the cord 20 can be more easily held on the cord outlet 12a without sacrificing the pressing function of the end of the cord 20 by the rod-like piece 16. Yes.

  The cross-sectional shape (the cross-sectional shape perpendicular to the longitudinal direction) of the rod-shaped piece 16 may be a shape having a corner such as a triangle or a quadrangle, but a shape having no corner such as a circle or an ellipse (in particular, the cord 20 It is preferable to have a shape having no corners in the lower part thereof that abuts on the surface. Thereby, it becomes possible to make the cord 20 difficult to be damaged by the rod-shaped piece 16.

[Other embodiments of cord cutter for brush cutter]
In addition to the embodiment shown in FIGS. 1 to 6, the cord holding device 10 for a brush cutter according to the present invention can be appropriately modified within a range that does not impair the gist of the invention. Hereinafter, an example of the cord holding device 10 for a brush cutter according to another embodiment of the present invention will be described. FIG. 7 is a plan view of a brush cutter cord holding device 10 according to another embodiment of the present invention. 8, by cutting the state where the end portion of the cord 20 which is wound around the inner body portion 11 pulled out from the cord pull-out port 12a in a plane including the rotational axis L ₁ at the brush cutter cord holding device 10 of FIG. 7 It is the shown perspective view. FIG. 9 is a plan view showing a state in which the end portion of the cord 20 wound around the inner trunk portion 11 in the cord cutter cord holding device 10 of FIG. 7 is drawn from the cord outlet 12a. FIG. 10 is a view showing a state in which the rod-like piece 16 (cord pressing means) in the bush cutter cord holding device 10 of FIG. 7 is viewed from the side.

1 to 6, the entire bar-like piece 16 is provided so as to be inclined with respect to a plane (upper surface of the bottom portion 13) perpendicular to the rotation axis L ₁ . In the bush cutter cord holding device 10 according to the embodiment, as shown in FIGS. 7 to 10, the base end portion 16 a side of the rod-like piece 16 is fixed to the upper surface of the bottom portion 13 and is in a state parallel to the upper surface. . Between the base end portion 16a and a distal end 16b of the rod-shaped piece 16, the rising portion 16c is formed to rise in a direction generally parallel to the rotational axis L _1. As shown in FIG. 7, the portion on the base end portion 16 a side and the portion on the distal end portion 16 b side of the upright portion 16 c in the rod-shaped piece 16 are formed to be bent slightly in a square shape in plan view. As shown in FIG. 10, a portion of the rod-shaped piece 16 on the side closer to the base end portion 16a than the upright portion 16c is inclined upward.

1 to 6, the entire bar-shaped piece 16 is inclined, and the gap between the bar-shaped piece 16 and the bottom portion 13 as it approaches the base end portion 16 a from the distal end portion 16 b of the rod-shaped piece 16. As the brush cutter cord holding device 10 repeats its rotation, the vicinity of the root of the cord 20 pulled out from the cord drawing outlet 12a is located between the base end portion 16a and the bottom portion 13 of the rod-shaped piece 16. In some cases, the bush retainer cord holding device 10 shown in FIGS. 7 to 10 has a rotating shaft L around the root of the cord 20 pulled out from the cord outlet 12a. ₁ is supported by the outer peripheral portion of the upright portion 16c substantially parallel to ₁ , so that the cord 20 is not sandwiched in the gap between the base end portion 16a and the bottom portion 13 of the rod-like piece 16.

  Further, in the cord cutter cord holding device 10 of FIG. 5, both end portions of one cord 20 wound around the inner trunk portion 11 are pulled out from the pair of cord outlets 12a. In the bush cutter cord holding device 10, as shown in FIG. 9, the end portions of the two cords 20 wound around the inner trunk portion 11 are pulled out to the outside of the outer trunk portion 12. For this reason, it is possible to trim the object to be trimmed more efficiently. Furthermore, in the cord cutter cord holding device 10 of another embodiment, the slit 15a is inclined with respect to the radial direction of the outer flange portion 15 as compared with the cord cutter cord holding device 10 shown in FIGS. Provided. For this reason, the cord 20 is less likely to come out of the slit 15a when the object to be cut is cut off.

  Furthermore, in the brush cutter cord holding device 10 according to another embodiment, as shown in FIG. 11, one edge (corresponding to the rotational direction of the cord cutter cord holding device 10) at the cord outlet 12 a of the outer trunk portion 12. The periphery A of the rear edge (the portion indicated by hatching in FIG. 7) is formed inwardly in a rounded shape. FIG. 11 is an enlarged perspective view showing the periphery A of one edge of the cord outlet 12a in the bush cutter cord holding device 10. FIG. When the cord cutter cord holding device 10 is rotating, the cord 20 does not hit the periphery A of one edge of the cord outlet 12a, but the cord 20 hits a hard tree branch or the like. In such a case, there is a risk that the cord 20 will hit the reaction force vigorously. In this regard, in the cord cutter cord holding device 10 according to another embodiment, since the one edge of the cord outlet 12a is recessed in a rounded shape, even if the cord 20 hits the one edge, By ensuring a large contact area, it is possible to prevent a local external force from being applied to the cord 20 and to prevent the cord 20 from being damaged.

  Furthermore, in the bush cutter cord holding device 10 according to another embodiment, as shown in FIG. 7, the rear side of the slit 15 a of the outer collar portion 15 (rearward with respect to the rotation direction of the bush cutter cord holding device 10). Side) claw portion 15b is formed longer. As a result, even if the cord 20 is violated when the brush cutter cord holding device 10 rotates, it is possible to make it difficult for the cord 20 to fall off the cord outlet 12a through the slit 15a. The length of the claw portion 15b (the length along the rotation direction of the brush cutter cord holding device 10; the same applies hereinafter) varies depending on the dimensions of the brush cutter cord holding device 10 but is 20 mm or more. Preferably, it is more preferably 25 mm or more, and further preferably 30 mm or more. Although there is no upper limit in particular in the length of the nail | claw part 15b, it is usually 50 mm or less.

  Other configurations of the bush cutter cord holding device 10 according to another embodiment are substantially the same as those of the bush cutter cord holding device 10 of FIGS. 1 to 6 described above, and thus detailed description thereof is omitted.

DESCRIPTION OF SYMBOLS 10 Crusher cord holding device 11 Inner trunk 12 Outer trunk 12a Cord outlet 13 Bottom (lower retaining part)
14 Upper retaining part (fixing part)
14a Fixing hole 15 Outer flange portion 15a Slit 15b Claw portion 16 Bar-shaped piece (code pressing means)
16a Base end portion of rod-like piece 16b Tip portion of rod-like piece 16c Upright portion of rod-like piece 20 Cord L ₁ Rotating shaft of brush cutter cord holding device L ₂ Center line in width direction of cord outlet a Brush cutter cord holding device Forward direction of rotation α Clearance β Side end of cord outlet γ Side end of cord outlet θ Tilt angle of cord outlet

Claims (10)

A cord retainer for a brush cutter used in a cord type brush cutter that trims an object to be trimmed by rotating a cord,
An inner trunk for winding the cord,
An outer trunk for covering the outer periphery of the cord wound around the inner trunk,
A bottom part connecting the lower end of the inner trunk part and the lower end of the outer trunk part,
Have
A cord drawing outlet for drawing the end of the cord wound around the inner trunk to the outside of the outer trunk is provided in the outer trunk, and an open end where the upper end of the cord outlet reaches the upper end of the outer trunk. It is,
The cord pressing means includes a cord pressing means for pressing the end portion of the cord drawn out from the cord drawing outlet to the outside of the outer trunk portion from the upper side so as not to be pulled out from the cord drawing outlet. A rod-shaped piece arranged across the cord outlet at a position spaced inward from the inner peripheral surface of the portion, and one end of the rod-shaped piece is interrupted in the vicinity of the cord outlet. A cord retainer for a brush cutter characterized by being made.
A cord retainer for a brush cutter used in a cord type brush cutter that trims an object to be trimmed by rotating a cord,
An inner trunk for winding the cord,
An outer trunk for covering the outer periphery of the cord wound around the inner trunk,
A bottom part connecting the lower end of the inner trunk part and the lower end of the outer trunk part,
Have
A cord drawing outlet for drawing the end of the cord wound around the inner trunk to the outside of the outer trunk is provided in the outer trunk, and an open end where the upper end of the cord outlet reaches the upper end of the outer trunk. It is,
The cord pressing means includes a cord pressing means for pressing the end portion of the cord drawn out from the cord drawing outlet to the outside of the outer trunk portion from the upper side so as not to be pulled out from the cord drawing outlet. Consisting of a bar-like piece arranged across the upper side of the cord outlet at a position spaced inward from the inner peripheral surface of the part, and one end of the bar-like piece was interrupted in the vicinity of the cord outlet A cord holding device for a brush cutter, characterized in that it is in a form .
The bar strip is provided to be inclined with respect to a plane perpendicular to the rotation axis, the one end of the rod-shaped piece, the other end portion according to claim 1 or 2, wherein is higher than said rod-shaped piece Cord retainer for brush cutters.
The rod-shaped piece is formed to be curved in a circular arc shape in plan view, and the distance from the inner peripheral surface of the outer body portion to the rod-shaped piece is shortened from the one end portion to the other end portion of the rod-shaped piece. The cord holding device for a brush cutter according to claim 3 , wherein the cord holding device is provided.
The cord holder for a brush cutter according to any one of claims 1 to 4, wherein an upright portion that rises in a direction substantially parallel to the rotation axis is formed between the one end portion and the other end portion of the bar-shaped piece. apparatus.
The cord for a brush cutter according to claim 5 , wherein the portion on the one end side and the portion on the other end side of the upright portion of the rod-like piece are bent in a U-shape in plan view. Holding device.
The cord holding device for a brush cutter according to claim 5 or 6, wherein a portion of the rod-shaped piece closer to the one end portion than the upright portion is inclined with respect to a plane perpendicular to the rotation axis.
The brush cutter according to any one of claims 1 to 7 , wherein the cord outlet is provided to be inclined with respect to the rotation shaft, and the cord held by the cord outlet is guided to the lower end of the cord outlet when rotating. Cord holding device.
The cord holding device for a brush cutter according to any one of claims 1 to 8 , wherein an outer trunk portion at a side end portion of the cord drawing outlet is formed in a rounded cross section.
It has an outer flange part that protrudes outward from the upper end of the outer trunk part,
The cord holding device for a brush cutter according to any one of claims 1 to 9 , wherein a slit reaching the cord outlet from the outer peripheral edge of the outer collar portion is provided in the outer collar portion.

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