JP5230591B2 - Harness for portable work equipment - Google Patents

Description

  The present invention relates to a harness used for a portable work machine.

  Patent Document 1 discloses a harness used for a portable work machine such as a brush cutter or a blower. This harness includes a back plate and a plurality of belts extending from the back plate, and has a structure that can be worn by the user. The harness further includes a fixture to which the work machine can be attached and a protection plate. The user can easily hold the work implement by attaching the harness and attaching the work implement to the fixture. At this time, the protective plate is interposed between the user wearing the harness and the work implement attached to the fixture. This prevents the work implement from coming into direct contact with the user.

JP 2005-143453 A

  Since the protective plate is interposed between the user and the work machine, vibrations and shocks transmitted from the work machine to the user are alleviated to some extent. However, simply disposing the protective plate between the user and the work machine cannot sufficiently suppress vibration and impact transmitted from the work machine to the user. Therefore, in the harness of Patent Document 1, a pad is provided on the back surface of the protective plate facing the user to reduce vibration and impact transmitted from the work machine to the user. According to the configuration of Patent Document 1, although a certain effect can be obtained, the structure of the protective plate is complicated. Therefore, there is a need for a harness that can suppress vibration and impact transmitted from the work machine to the user without adding a cushioning component such as a pad to the protective plate.

  The present invention provides a harness worn by a user to hold a portable work machine. This harness includes a fixture to which the work machine can be attached and a protective plate. The user can easily hold the work implement by attaching the harness and attaching the work implement to the fixture. At this time, the protective plate is interposed between the user wearing the harness and the work implement attached to the fixture, and prohibits the work implement from coming into direct contact with the user.

  The protective plate is formed with a protruding portion that protrudes toward the working machine attached to the fixture along at least a part of the peripheral edge thereof. According to this structure, the work machine contacts the protruding portion formed on the periphery of the protection plate and does not contact the intermediate portion of the protection plate. On the other hand, the user comes into contact with the intermediate portion of the protective plate from the side opposite to the work machine. That is, in this protection plate, the range in which the work implement abuts and the range in which the user abuts are different from each other. Thereby, the vibration and impact transmitted to the user from the work machine via the protective plate are remarkably reduced. Furthermore, the protection plate can bend passively in response to vibration and impact from the work machine, and can absorb the vibration and impact. That is, the protective plate functions like a leaf spring. According to this protective plate, vibration and impact transmitted from the work machine to the user can be suppressed without adding a cushioning component such as a pad.

  It is preferable that the protrusions described above are formed at least on both side edges of the protective plate. According to this structure, the working machine comes into contact with both side edges of the protective plate, and the protective plate that comes into contact with the user in the middle portion thereof bends relatively greatly in response to vibration and impact from the working machine. Can do. Note that the protruding portions may be formed not only on both side edges of the protective plate but also on the upper and lower edges of the protective plate.

  When the above-described protective plate is viewed from the front, it is preferable that at least a part of the peripheral edge where the protruding portion of the protective plate is formed is curved. That is, it is preferable that at least a part of the peripheral edge of the protective plate is curved, and at least a part of the protruding portion is formed in the curved range. According to this configuration, the strength of the protection plate can be increased, and relatively strong vibrations and impacts can be sufficiently absorbed. Further, the thickness and weight of the protective plate can be reduced while maintaining the strength required for the protective plate.

  When the above-described protrusions are formed on both side edges of the protection plate, when the protection plate is viewed from the front, at least the lower part of each side edge where the protrusions are formed faces the center of the protection plate. And are preferably curved. According to this structure, the strength of the protective plate can be increased, and the protective plate can be prevented from being caught by the user or the clothes.

  It is preferable that the cross-sectional shape in the above-mentioned protrusion part is changing along the periphery of a protection plate. According to this structure, the strength of the protective plate can be increased as compared with the case where the protrusion has a uniform cross-sectional shape.

  The protruding portion described above may be a bent portion where the protective plate is bent. In that case, it is preferable that the bending angle is changing along the periphery of the protection plate. According to this structure, the cross-sectional shape of the protrusion changes along the periphery of the protection plate, and the strength of the protection plate can be increased.

  The protruding portion described above may be a curved portion where the protective plate is curved. In that case, the radius of curvature preferably varies along the periphery of the protective plate. According to this structure, the cross-sectional shape of the protrusion changes along the periphery of the protection plate, and the strength of the protection plate can be increased.

  According to the harness of the present invention, vibration and impact transmitted from the work machine to the user can be sufficiently suppressed. Since it is not always necessary to add a cushioning component such as a pad to the protective plate, the structure of the protective plate is not complicated, and the manufacturing can be easily performed.

The perspective view of the harness of an Example. The figure which shows an example of the brush cutter which is a kind of portable work machine. The front view of a protection plate. The right view of a protection plate. The perspective view of a protection plate. VI-VI sectional view taken on the line of FIG. VII-VII line sectional drawing of FIG. Sectional drawing which shows the protection plate interposed between a user and a brush cutter. Sectional drawing which shows the protection plate of another Example. Sectional drawing which shows the protection plate of another Example. Sectional drawing which shows the protection plate of another Example.

  With reference to drawings, the harness 10 which is an Example of this invention is demonstrated. FIG. 1 is a perspective view showing the entire harness 10. The harness 10 is a wearing tool worn by the user in order to hold the brush cutter 100 shown in FIG. FIG. 2 shows an example of the brush cutter 100, and the use of the harness 10 is not limited to the brush cutter 100 shown in FIG. Furthermore, the harness 10 is not limited to the brush cutter 100 but can be used for other types of portable working machines such as a blower.

  As shown in FIG. 1, the harness 10 includes a back plate 20 and a plurality of belts 22L, 22R, 26L, and 26R. The back plate 20 is disposed on the back of the user when the user (not shown) wears the harness 10. Although the back plate is an example, it is formed of a synthetic resin material.

  The plurality of belts 22L, 22R, 26L, and 26R include a left shoulder belt 22L, a right shoulder belt 22R, a left waist belt 26L, and a right waist belt 26R. The left shoulder belt 22L and the right shoulder belt 22R are respectively disposed on the left shoulder and the right shoulder of the user. A shoulder pad 24 is put on each of the left shoulder belt 22L and the right shoulder belt 22R. The left waist belt 26L and the right waist belt 26R are respectively disposed on the left waist and the right waist of the user. Each belt 22L, 22R, 26L, 26R is formed of synthetic fibers. One end of each belt 22L, 22R, 26L, 26R is fixed to the back plate 20, and a buckle 28 is provided on the other end of each belt 22L, 22R, 26L, 26R. The buckle 28 has a socket 28L and a plug 28R that can be attached to and detached from each other. The left shoulder belt 22L and the left waist belt 26L are fixed to the socket 28L, and the right shoulder belt 22R and the right waist belt 26R are fixed to the plug 28R. Has been. By the buckle 28, the other end of each belt 22L, 22R, 26L, 26R is coupled to each other on the front surface of the user.

  The harness 10 further includes a fixture 30 and a protection plate 40. The fixture 30 and the protection plate 40 are provided on the right waist belt 26R. When the user wears the harness 10, the fixture 30 and the protective plate 40 are disposed on the outer side surface of the user's right thigh. The right waist belt 26R is longer than the left waist belt 26L, and the fixture 30 and the protection plate 40 can move with respect to the user.

  The attachment tool 30 is a bracket for attaching a working machine such as the brush cutter 100. A metal fitting here is not limited to a metal thing, The thing formed with other materials, such as resin, is also included. In the present embodiment, as an example, a snap is adopted for the fixture 30, and the work implement is detachable. As shown in FIG. 1, when using the harness 10 for the brush cutter 100, the operating rod 130 of the brush cutter 100 is attached to the attachment tool 30. As shown in FIG. 2, in the brush cutter 100, the cutting blade unit 120 is provided at the front end of the operation rod 130, and the main body unit 140 is provided at the rear end of the operation rod 130. A handle 134 is provided in the middle. The user can hold the brush cutter 100 easily and stably by attaching the harness 10, attaching the operation rod 130 to the fixture 30, and gripping the handle 134.

  The protection plate 40 is a plate-like member made of a resin material. Although the protection plate 40 of the present embodiment is an example, it is made of high-density polyethylene (HDPE) and has appropriate strength and flexibility (elasticity). The protective plate 40 can also be formed of other flexible (elastic) materials such as other resin materials or metal materials. The material forming the protective plate 40 is not limited to a specific material. The protection plate 40 is interposed between the brush cutter 100 (or other portable work machine) attached to the fixture 30 and the user wearing the harness 10 so that the brush cutter 100 directly contacts the user. To prevent. Thereby, the vibration and impact transmitted to the user from the brush cutter 100 are alleviated.

The overall configuration of the harness 10 has been described above. Below, the characteristic structure of the protection plate 40 is demonstrated in detail.
As shown in FIG. 1, the protection plate 40 is not a flat plate material as a whole, but has protruding portions 44 formed along both side edges 40 a and 40 b. The protruding portion 44 protrudes toward the brush cutter 100 attached to the fixture 30. Thereby, the operating rod 130 of the brush cutter 100 is in contact with the protective plate 40 at the protruding portion 44. Here, both side edges 40a and 40b of the protection plate 40 are portions located on both sides in the horizontal direction in the periphery of the protection plate 40 based on the posture of the protection plate 10 when the user wears the harness 10. means.

  3 shows a front view of the protection plate 40, FIG. 4 shows a right side view of the protection plate 40, and FIG. 5 shows a perspective view of the protection plate 40. As shown in FIG. As described above, the protective plate 40 has the protruding portions 44 formed along the side edges 40a and 40b. On the other hand, the intermediate part 42 located between the protrusions 44 on both sides is a flat part. The flat intermediate portion 42 is formed with a hook-shaped portion 43 that holds the fixture 30.

  As shown in FIG. 3, when the protective plate 40 is viewed from the front, the side edges 40a and 40b of the protective plate 40 are curved, and the protruding portions 44 are formed on the curved side edges 40a and 40b. ing. According to this structure, the strength of the protection plate 40 can be increased as compared with the case where the protruding portion 44 is formed on the linear peripheral edge. Further, the lower portion B of each side edge 40 a, 40 b of the protection plate 40 is curved toward the center of the protection plate 40. According to this structure, the protection plate 40 is prevented from being caught by the user or the clothes.

  As shown in FIGS. 6 and 7, the protruding portion 44 of this embodiment is a bent portion in which the side edge portion including the side edges 40 a and 40 b of the protective plate 40 is bent with respect to the intermediate portion 42. Here, between the cross section shown in FIG. 6 and the cross section shown in FIG. 7, the angles C1 and C2 at which the protruding portion 44 bends are different, and the angle C1 is larger than the angle C2. That is, the bending angle of the protrusion 44 changes along the side edges 40a and 40b, and the value increases as it goes downward. As a result, the cross-sectional shape of the protrusion 44 changes continuously along the side edges 40a and 40b. According to this structure, the strength of the protection plate 40 can be increased as compared with the case where the protruding portion 44 has a uniform cross-sectional shape. By increasing the strength of the protective plate 40, the thickness and weight of the protective plate 40 can be reduced while maintaining the required strength and flexibility (elasticity).

  Further, as shown in FIG. 3, the bending line 46 located at the boundary between the protruding portion 44 and the intermediate portion 42 is also curved along the side edges 40 a and 40 b of the curved protective plate 40. When the bending line 46 is curved in this way, the strength of the protective plate 40 can be increased as compared with the case where the bending line 46 extends linearly.

  FIG. 8 shows the protective plate 40 interposed between the user 200 and the brush cutter 100 (cross-sectional view). As shown in FIG. 8, the brush cutter 100 abuts on the protrusions 44 formed on both side edges 40 a and 40 b of the protection plate 40 and does not abut on the intermediate portion 42 of the protection plate 40. On the other hand, the user 200 contacts the intermediate portion 42 of the protection plate 40 from the side opposite to the brush cutter 100. That is, in the protection plate 40 of the present embodiment, the range in which the brush cutter 100 abuts and the range in which the user 200 abuts are different from each other. Thereby, the vibration and impact transmitted from the brush cutter 100 to the user 200 via the protective plate 40 are remarkably reduced. Furthermore, the protection plate 40 can absorb the vibration and impact by passively bending in response to the vibration and impact from the brush cutter 100. That is, the protection plate 40 can function like a leaf spring between the brush cutter 100 and the user 200. According to this protective plate 40, vibrations and impacts from the brush cutter 100 can be absorbed without transmission of cushioning parts such as pads, and transmission of the vibrations and impacts to the user 200 can be suppressed. However, the protective plate 40 may be additionally provided with a cushioning component such as a pad as necessary. In this case, the vibration and impact from the brush cutter 100 are absorbed by both the shape of the protection plate 40 and the cushioning component.

  As mentioned above, although embodiment of this invention was described in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  For example, as illustrated in FIG. 9, the protruding portion 44 of the protective plate 40 may be a curved portion where the protective plate 40 is curved. In this case, it is preferable to change the curvature radius R along the side edges 40a and 40b. According to this structure, the cross-sectional shape in the protrusion part 44 changes along each side edge 40a, 40b, and the intensity | strength of the protection plate 40 can be raised. Further, as shown in FIG. 10, the entire protective plate 40 may be curved. In this case, the strength against bending of the protection plate 40 can be adjusted by designing the curvature radius R1 of the intermediate portion 42 and the curvature radius R2 of the protruding portion (side edge portion) 44 to be different values.

  In addition, the protruding portion 44 of the protective plate 40 is not limited to the bent or curved protective plate 40, and as shown in FIG. 11, the protruding portion 44 is formed by partially increasing the thickness of the protective plate 40. 44 can also be formed. Furthermore, the protrusion 44 may be formed integrally with the protection plate 40 or may be formed by attaching another component to the protection plate 40. Furthermore, the protrusion 44 is not limited to the side edges 40 a and 40 b of the protection plate 40, and can be formed on a part or the whole of the protection plate 40. In this case, the range in which the protrusion 44 is provided may be designed so that the brush cutter 100 is prohibited from contacting the intermediate portion 42 of the protection plate 40.

  The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. The technology illustrated in this specification or the drawings achieves a plurality of objects at the same time, and achieving one of the objects itself has technical utility.

10: harness 20: back plate 30: fixture 40: protection plate 40a, 40b: side edge 44 of the protection plate: protrusion 100 of the protection plate: brush cutter 200: user

Claims (7)

A harness worn by a user to hold a portable work machine,
A fixture to which the work machine can be attached;
A protective plate interposed between the user wearing the harness and the work implement attached to the fixture;
At least a part of the periphery of the protective plate is formed with a protruding portion that protrudes toward a working machine attached to the fixture, and the working machine is in contact with the protective plate at the protruding portion. A characteristic harness.   The harness according to claim 1, wherein the protrusion is formed at least on both side edges of the protection plate.   3. The harness according to claim 1, wherein when the protection plate is viewed from the front, at least a part of a peripheral edge where the protruding portion of the protection plate is formed is curved. The protrusion is formed at least on both side edges of the protective plate,
When the protective plate is viewed from the front, at least the lower part of each side edge where the protruding portion is formed is curved toward the center of the protective plate,
The harness according to any one of claims 1 to 3, wherein:   The harness according to any one of claims 1 to 4, wherein a cross-sectional shape of the projecting portion changes along a peripheral edge of the protection plate.   The said protrusion part is a bending part which the peripheral part of the said protective plate bends with respect to an intermediate part, The bending angle is changing along the peripheral edge of the protective plate of Claim 5 characterized by the above-mentioned. Harness.   The harness according to claim 5, wherein the protruding portion is a curved portion in which at least a peripheral portion of the protective plate is curved, and a radius of curvature thereof changes along the peripheral edge of the protective plate.

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