JP4820744B2 - Brush cutter - Google Patents

Description

  The present invention relates to a brush cutter in which an operating rod with a rotary blade attached to the tip and an engine can be connected and separated.

  A simple brush cutter has a configuration in which a user carries an engine, a rotary blade is attached to the tip of an operating rod incorporating a power transmission shaft, and the operating rod is indirectly connected to the engine via a flexible shaft (so-called backpacking). Type with a rotary blade attached to the tip of an operating rod with a built-in power transmission shaft, an engine directly connected to the rear end, and the operating rod is suspended from the shoulder of the user by a shoulder belt (so-called shoulder type) And a brush cutter). Both of them are provided with either a loop handle, a two-grip handle or a two-hand handle on the operation rod, and a throttle (for example, a throttle lever) is provided on the grip of each operation rod or each handle. The user adjusts the vertical or horizontal posture of the operating rod by holding each handle, and controls the rotation and stop of the rotary blade by operating the throttle.

  Since the backlash type brush cutter has a flexible shaft that can be connected to and separated from the operation rod and the engine, the flexible shaft is separated from the operation rod and the engine for shipping from the factory. The required storage space can be reduced during transportation. In this regard, even with a shoulder-type brush cutter, for example, as seen in Patent Document 1, the operation rod and the engine are separated from each other at the time of shipment from the factory by making the operation rod and the engine separable. The required storage space can be reduced during packing, storage or transportation.

  Incidentally, Patent Document 1 does not particularly describe a throttle wire that connects the throttle and the engine. As long as the operating rod and the engine are packed in the same package and the arrangement of the two can be freely controlled to some extent, the flexible throttle wire may be connected to the engine. However, it is preferable that the operation rod and the engine that can be connected and separated are completely separated and can be packaged separately. From now on, when the operation rod and the engine can be connected and separated freely, the throttle wire is also divided into the operation rod side wire and the engine side wire. The structure which connects is adopted. The same applies to the power supply lead wire connecting the stop switch for emergency stop of the engine and the engine.

  The connection / separation structure of the throttle wire is configured by applying the connection / separation structure disclosed in Patent Document 2 to Patent Document 1, for example. In Patent Document 2, the throttle wire can be freely connected to and separated from the throttle. However, if the throttle wire is considered as an operating rod side wire and the throttle as an engine side wire, a throttle wire connection and separation structure is obtained. However, in this case, the engaging portion (the end fitting 15) of the throttle wire (operating rod side wire) is fitted to the engaging receiving portion (the inner wire connecting portion 14) of the throttle (engine side wire), and further the throttle wire Since it is necessary to separately attach a case (cap body 13) that covers the other, even if Patent Document 2 is simply applied to Patent Document 1, a simple connection / separation structure of the throttle wire and an easy connection / separation work can be performed. Cannot be realized.

JP 11-187738 A ([0014] to [0018]) Japanese Utility Model Publication No. 62-060123 (6th page)

  For the purpose of reducing the storage space required for packing, storing or transporting the brush cutter, it is possible to completely separate the control rod and engine, which can be connected and separated, so that they can be separated from each other. It is desirable that the line can be connected and separated. However, as described above, simply applying Patent Document 2 to Patent Document 1 cannot realize a simple connection / separation structure of the throttle wire or an easy connection / separation operation. Therefore, for the purpose of increasing the degree of freedom in handling the operation rod and the engine when packing, storing or transporting the brush cutter, that is, for the purpose of enabling separate packaging, the cutting blade with which the operation rod and the engine can be connected and separated. In the dispenser, in order to make at least the throttle wire connectable and separable, and preferably to make the power supply lead wire connectable and separable, a simple connection and separation structure of the throttle wire or power supply lead wire and an easy connection and separation operation were examined.

  As a result of investigation, in a brush cutter in which the operation rod with a rotary blade attached to the tip and the engine can be connected and separated, the operation rod side connector to which the operation rod side wire extending from the throttle provided in the operation rod is connected is connected to the engine. The operation rod side connector is attachable to and detachable from the engine side connector to which the engine side wire is connected. The operation rod side connector has an engaging portion having magnetic force attached to the end of the operation rod side wire, and the lower side is opened. The engagement part is configured to protrude freely inside the connector main body, and the engine side connector is engaged with an end of the engine side wire extending from a recess having a magnetic force adsorption bottom part to extend a pulling groove of the operation rod side wire. We have developed a brush cutter that has a receiving part attached and the engagement receiving part protrudes forward and backward inside the engine-side connector body with the upper part opened.

  The “inside” of the operation rod side connector body means, for example, if the operation rod side connector body is a box-shaped cap (a box body with at least the lower part opened), the space inside the box-shaped cap, the operation rod side connector body If is a lid-like base (a plate that closes the open surface of the box), it means within the range surrounded by the periphery of the lid-like base. The same applies to the “inside” of the engine-side connector body. The operation rod side connector body and the engine side connector body are formed with a latching claw on one side and a latching groove on the other side. Can be easily secured.

  The “engagement part having magnetic force” is sufficient if all or part of the members constituting the engagement part has a magnetic force. For simplicity, the entire engagement part is constituted by a permanent magnet, or A permanent magnet is attached to a part. The engagement receiving portion fits the engagement portion into the concave portion having the magnetic force adsorption bottom portion, and pulls out the operating rod side wire connected to the engagement portion from the drawing groove. The “magnetic force adsorption bottom portion” is a portion where the engaging portion is adsorbed by magnetic force, and constitutes the bottom surface of the recess. The specific magnetic force adsorption bottom is made of a permanent magnet or a magnetic metal (iron, nickel, cobalt, martensitic stainless steel, etc.). When both the engaging portion and the magnetic force adsorption bottom portion are permanent magnets, the respective permanent magnets are arranged so that the attracting polarities are paired.

  The brush cutter according to the present invention divides the throttle wire into an operation rod side wire extending from a throttle provided on the operation rod and an engine side wire extending from the engine, and an operation rod side connector to which the operation rod side wire is connected. The connection separation structure is configured to be detachable from the engine side connector to which the engine side wire is connected. As a means for maintaining the mounting state of the operation rod side connector and the engine side connector, the latching claw provided on one side and the latching groove provided on the other side are the simplest. Various means can be used. The operation rod side connector has a configuration in which an engagement portion attached to the end of the operation rod side wire is projected in a free state on the inside of the operation rod side connector main body which is opened downward, and the engine side connector is Since the engagement receiving portion attached to the end portion of the engine side wire is protruded inside the engine side connector body opened upward so as to freely advance and retract, the connection and separation structure in the present invention is simple.

  When the operating rod side connector is mounted so as to cover the engine side connector, the engaging portion attached to the end portion of the operating rod side wire is attached to the magnetic force adsorption bottom portion of the recess of the engaging receiving portion attached to the end portion of the engine side wire. In this state, only the operating rod side wire is pulled out from the pulling groove and is fitted into the recess, and the mechanical connection between the operating rod side wire and the engine side wire is completed. That is, if it is a range surrounded by the operating rod side connector and the engine side connector, for example, a box-shaped cap with the operating rod side connector body opened downward, or an engine side connector body, the engine side connector body The engagement portion attached to the end of the operation rod side wire is attached to the end of the engine side wire without requiring the user's manual work in the space formed by covering the operation rod side connector body with An easy connection / separation operation is realized by reliably engaging the recess of the engagement receiving portion.

  As long as the engaging portion and the concave portion of the engagement receiving portion are in a fitting relationship, the structure or size is not specified as long as the engaging portion is in a paired relationship with the concave portion. The engagement part and the engagement receiving part which are seen may be sufficient. In this case, for example, a configuration is possible in which the spherical engaging portion is entirely made of a permanent magnet, and the engaging receiving portion is made entirely of a material that is not attracted to magnetic force, and a magnetic force attracting bottom is formed in the recess. However, the concave portion of the engagement receiving portion must be cylindrical with respect to the spherical engaging portion, and there is no denying the possibility that the engaging portion will come off from the concave portion of the engagement receiving portion. Therefore, it is preferable that the engaging portion has a block shape having a plurality of surfaces, and the concave portion of the engaging receiving portion has a transfer structure of the engaging portion. Specifically, the engaging portion is a cylindrical block shape, the operating rod side wire is connected to the cylindrical side surface, the concave portion of the engaging receiving portion is a cylindrical outer hole, and the drawer extends radially from the cylindrical side surface. The structure which provides a groove can be illustrated. In this case, if the bottom surface of the engaging portion is made of a permanent magnet and the bottom surface of the recess is a magnetic adsorption bottom portion made of magnetic metal, the engaging portion can be easily and accurately fitted into the recess of the engagement receiving portion.

  The power supply lead wire may use a connection separation structure using a male plug and a female plug, which are conventionally seen. However, from the viewpoint of facilitating connection / separation work, it is desirable to use the operation lever side connector and the engine side connector for the connection / separation structure of the power supply lead wire. Specifically, the power supply lead wire is divided into an operation rod side lead wire and an engine side lead wire, and the operation rod side connector has an operation rod side lead wire extending from a stop switch attached to the operation rod along with the operation rod side wire. Connect the engine-side connector to the engine-side wire and the engine-side lead wire that extends from the engine. The operation rod-side connector operates to the contact terminal that protrudes downward from the inside of the operation rod-side connector body. The heel side lead wire is connected, and the engine side connector has a configuration in which the engine side lead wire is connected to a receiving terminal protruding upward from the inside of the engine side connector body.

  The contact terminal is brought into pressure contact with the receiving terminal by attaching the operating rod side connector to the engine side connector, and completes electrical connection (conduction) between the operating rod side lead wire and the engine side lead wire. Here, the contact terminal and the receiving terminal are composed of a pair of parallel metal plates, for example, a bulging portion that press-contacts the contact terminal is formed on the receiving terminal, and the contact terminal approaches the receiving terminal to thereby A configuration in which the bulging portion is in pressure contact with the contact terminal can be exemplified. In addition, it is good also as a leaf | plate spring shape which elastically deforms a receiving terminal toward the downward direction, and it is good also as a plate shape or rod shape which abuts a contact terminal with respect to the said receiving terminal from the upper direction. In this case, it is good to provide the recessed part or convex part which the front-end | tip of the said contact terminal engages in the site | part with which a contact terminal strikes a receiving terminal.

  Even if the operation rod side connector and the engine side connector are fixed to the operation rod or the engine, respectively, or the operation rod or the engine is free from the operation rod or the engine, the operation rod side connector may be attached to the engine side connector. However, from the viewpoint of increasing the degree of freedom of the connection separation work while facilitating the connection separation work, the operation rod side connector is configured such that the operation rod side connector body is supported by the operation rod side wire in a free state. The engine-side connector is preferably provided with the engine-side connector main body fixed to a connection site of the engine or the operating rod. As a result, the user can easily attach the operation lever side connector to the engine side connector whose position is fixed while holding the operation rod side connector.

  According to the present invention, a brush cutter in which the operating rod and the engine are completely connected and separated can be configured, and the operating rod and the engine can be separately packaged, and the convenience in packing, storage or transportation is improved. be able to. This is because the connection / separation structure of the throttle wire and the power supply lead wire is simple and the connection / separation work of the throttle wire and the power supply lead wire is easy, so that the user can easily operate the operation rod and the engine. Can be connected and separated. In addition, the connection separation structure of the present invention can be applied not only to a shoulder-type brush cutter that directly connects an operating rod to an engine, but also to a shoulder-type brush cutter that indirectly connects the operating rod and the engine via a flexible shaft. There is also an effect of increasing the degree of freedom in handling between the operation rod and the engine in a simple brush cutter.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a part of a shoulder-type brush cutter to which the present invention is applied, FIG. 2 is a side view showing a part of the brush cutter of this example, and FIG. 3 shows an operation side connector 3 as an engine side connector 4. 4 is a partial cross-sectional plan view showing the connection separation structure in the mounted state, FIG. 4 is a partial cross-sectional side view showing the connection separation structure in a state where the operation rod side connector 3 is attached to the engine side connector 4, and FIG. FIG. 6 is a side view of the operating rod side connector 3, FIG. 7 is an enlarged cross-sectional view of the operating rod side connector 3 taken along line AA in FIG. 5, and FIG. 8 is a plan view of the engine side connector 4. 9 is a side view of the engine-side connector 4 (illustration of the outer partition wall 425 on the front side in FIG. 9), and FIG. 10 is a front view of the engine-side connector 4.

  In each figure, the direction in which the operating rod 1 extends from the engine 2 is defined as the front (the left side in FIGS. 1 to 6, 8 and 9, the front side in FIG. The engine 2 side is the rear side (right side of the paper surface in FIGS. 1 to 6, 8 and 9, and the back side perpendicular to the paper surface in FIGS. 7 and 10 is the rear side), and the brush 2 is placed horizontally with the brush cutter placed horizontally. The right side of the operation rod 1 is viewed to the right (upper side of the paper in FIGS. 1, 3, 5 and 8, the rear side perpendicular to the paper surface in FIGS. 2, 4, 6 and 9, the paper surface in FIGS. 7 and 10. The left side of the operation rod 1 when viewed from the engine 2 with the brush cutter placed horizontally is on the left side (FIG. 1, FIG. 3, FIG. 5 and FIG. 4, 6, and 9, the front side orthogonal to the paper surface and the right side of the paper surface in FIGS. 7 and 10 are the left side).

  As shown in FIGS. 1 and 2, the brush cutter of this example is a shoulder-type brush cutter in which the operating rod 1 and the engine 2 can be connected and separated. The operating rod 1 has a grip 11 in the middle, and a throttle 12 and a stop switch 13 are provided on the grip 11. The operating rod side wire 31 extends from the throttle 12, and the operating rod side lead wires 34, 34 (two positive and negative) extend from the stop switch 13 toward the engine 2, respectively. The operating rod side wire 31 and the operating rod side lead wires 34, 34 are bundled by the flexible pipe 14 and protrude from the rear end of the grip 11, and are connected to the operating rod side connector 3 in a free state. The engine 2 is covered with an engine cover 21, and an engine-side connector 4 is provided at a fixed position at a portion where the operating rod 1 of the engine cover 21 is connected. The engine side wire 41 and the engine side lead wires 44, 44 (two positive and negative) extending from the engine 2 are connected to the engine side connector 4.

  The connection separation structure of the operation rod side wire 31 and the operation rod side lead wires 34, 34 and the engine side wire 41 and the engine side lead wires 44, 44 is as shown in FIG. 3 and FIG. And the engine side connector 4. The connection / separation structure of the present example is obtained by connecting the operating rod 1 to the engine 2 and then attaching the operating rod side connector 3 to the engine side connector 4 from above. The side wire 41 can be connected, and the operation rod side lead wires 34 and 34 and the engine side lead wires 44 and 44 can be energized. To release each of the connection states, it is only necessary to remove the operating rod side connector 3 from the engine side connector 4. Thus, the connection separation of the operation rod side wire 31 and the engine side wire 41 and the connection separation of the operation rod side lead wires 34, 34 and the engine side lead wires 44, 44 are facilitated. The effect is recognized.

  As shown in FIGS. 5 to 7, the operation rod side connector 3 has an operation rod side wire 31 and operation rod side lead wires 34, 34 protruding from the inside of the operation rod side connector main body 32. The operation rod side connector main body 32 is formed of a resin box-shaped cap having an open bottom surface and a back surface, and an operation rod side latching claw 321 and an operation rod side latching groove 322 are provided in order from the front inside the side surface. In addition, two contact terminal support portions 323 that protrude downward toward the left side inside the upper surface are provided side by side, and the contact terminals 35 are press-fitted and attached to the contact terminal support portions 323, respectively. The contact terminal 35 in this example is a flat metal plate that protrudes downward. The operating rod side wire 31 is connected to the distal end of the engaging rod 33 in a free state while protruding from the inside of the operating rod side connector body 32. Further, the operating rod side lead wires 34, 34 are projected to the inside of the operating rod side connector body 32 and connected to the front end of the contact terminal 35 whose position is fixed.

  The engaging portion 33 of the present example is a non-magnetic metal in which a rectangular parallelepiped connection portion having a lower height than the main body is integrally provided on a cylindrical main body with the bottom surface of the main body and the bottom surface of the connection portion being flush with each other. A permanent magnet (not shown) is housed inside, and the magnet is exposed on the bottom surface. Thereby, the magnetic force of the engaging portion 33 is exhibited only on the bottom surface, and the engaging portion 33 can be attracted to the magnetic metal approaching the bottom surface. In addition, the engaging portion 33 of the present example is an asymmetric block as a whole, and the concave portion 432 of the engaging receiving portion 432, which is a transfer structure of the engaging portion 33, has a rectangular outer shape in a cylindrical outer shape hole. Since it has a structure in which the concave portion is provided integrally, the engaging portion 33 can not be fitted into the concave portion 432 in the lateral direction, and can be fitted in a posture in which the bottom surface is directed to the magnetic force adsorption bottom portion 431 of the concave portion 432. .

  As shown in FIGS. 8 to 10, the engine-side connector 4 has an engine-side wire 41 and engine-side lead wires 44, 44 protruding inside the engine-side connector body 42. The engine-side connector body 42 is made of a resin lid base that closes the opened lower surface of the operation rod-side connector body 32, and includes a pair of left and right outer partition walls 425, 425 extending in the front-rear direction in the range of the front half. An inner partition wall 426 that divides between the partition walls 425 and 425 and extends in the front-rear direction, and a front-rear partition wall 424 that intersects the rear edges of the outer partition wall 425 and the inner partition wall 426 in the left-right direction on the upper surface. Forming. The outer partition wall 425, the inner partition wall 426, and the front and rear partition walls 424 function as ribs that reinforce the engine-side connector body. The engine side connector main body 42 is screwed to the engine cover 21 (see FIG. 3).

  Each outer partition wall 425 is provided with an engine side latching groove 422 corresponding to the operation rod side latching claw 321 and an engine side latching claw 421 corresponding to the operation rod side latching groove 322 on the outside. When the operating rod side connector 3 is attached to the engine side connector 4, the inside of the side surface of the operating rod side connector body 32 is in close contact with the outside of each outer partition wall 425, and the operating rod side latching claw 321 is in the engine side latching groove. The engine side latching claw 421 is latched in the operation rod side latching groove 322 while being hooked to the engine 422, so that the integrity of the operation rod side connector 3 and the engine side connector 4 is ensured. The engine side wire 41 and the engine side lead wires 44, 44 are respectively supported by the front and rear partition walls 424, and the engine side wire 41 protrudes between the left outer partition wall 425 and the inner partition wall 426, and the engine side lead. Lines 44 and 44 are projected between the right outer partition wall 425 and the inner partition wall 426.

  The engagement receiving portion 43 is housed between the left outer partition wall 425 and the inner partition wall 426, and guide rails 427 and 427 provided on the inner side of the left outer partition wall 425 and the inner partition wall 426 facing each other. The upper edge is hooked and moves only in the front-rear direction between the outer partition wall 425 and the inner partition wall 426 without deviating. The engine side wire 41 projecting forward from the front and rear partition walls 424 has the engagement receiving portion 43 connected to the tip. Two receiving terminal support portions 423 and 423 are provided side by side between the outer partition wall 425 and the inner partition wall 426 on the right side, and each receiving terminal support portion 45 is made of a metal plate having a protruding portion protruding to the left side. It is press-fitted into the 423. When the operating rod side connector 3 is attached to the engine side connector 4, the receiving terminal 45 brings the contact terminal 35 into pressure contact with the bulging portion and conducts. In this example, an insulating wall 428 is provided between the receiving terminal support portions 423 and 423 in order to prevent the receiving terminal 45 from being bent and short-circuited. The operating rod side lead wires 34 that project forward from the front and rear partition walls 424 are connected to the rear ends of the receiving terminals 45.

  The engagement receiving portion 43 of this example is a block shape made of a nonmagnetic metal having a rectangular cross section provided with a recess 432 which is a transfer structure of the engagement portion 33, and a disk shape made of a magnetic metal on the bottom surface of the recess 432. The metal plate is fitted, and the metal plate is used as a magnetic force adsorption bottom portion 431. As described above, since the engaging portion 33 is flush with the bottom surface of the main body and the bottom surface of the connection portion, the bottom surface corresponding to the connection portion of the recess 432 and the surface of the magnetic force adsorption bottom portion 431 are flush with each other. The engaging portion 33 is brought into contact with the entire recess 432. Further, the recess 432 is provided with a pull-out groove 433 extending forward to pull out the operating rod side wire 31 extending from the fitted engaging portion 33. In addition, the operating rod side wire 31 and the engine side wire 41 connected by fitting the engaging portion 33 into the recess 432 do not necessarily have to be aligned on the same straight line. In order to transmit the movement of the wire 31 to the engine side wire 41 as much as possible, the operating rod side wire 31 and the engine side wire 41 are aligned on the same straight line.

  11 to 16 are partial sectional front views (FIGS. 11, 13, and 15) and partial enlarged perspective views (FIGS. 12, 14) showing respective stages in the connecting procedure between the operating rod side connector 3 and the engine side connector 4. FIG. 11 and 12 show the stage where the operating rod side connector 3 and the engine side connector 4 are completely separated, and FIGS. 13 and 14 show the operating rod side connector 3 as the engine side connector 4. FIG. 15 and FIG. 16 show the stage in which the operation rod side connector 3 is completely attached to the engine side connector 4. The front-rear direction and the left-right direction in each figure are the same as those described with reference to FIGS.

  At the stage where the operating rod side connector 3 and the engine side connector 4 are completely separated, as shown in FIGS. 11 and 12, the contact terminal 35 and the receiving terminal 45 are not electrically separated from each other, and The engagement portion 33 is separated from the recess 432 of the engagement receiving portion 43 and is in a state of floating in the air according to the free state of the operation rod side wire 31 inside the operation rod side connector body 32. For this reason, the posture of the engaging portion 33 is not stable, and for example, it can be considered that the posture is inclined with respect to the operating rod side wire 31 (see FIG. 12). Conventionally, the operator has manually corrected the engaging portion 33 in such a tilted position and fitted it into the recess 432 of the engaging receiving portion 43. According to the present invention, the operator's hand is If the operating rod side connector 3 is attached to the engine side connector 4 without bothering, the engaging portion 33 can be accurately fitted into the concave portion 432 of the engaging receiving portion 43.

  When the operation rod side connector 3 starts to be attached to the engine side connector 4, as shown in FIGS. 13 and 14, the operation rod side latching claw 321 of the operation rod side connector body 32 is attached to the outer partition of the engine side connector body 42. It interferes with the wall 425, and the engine side latching claw 421 of the engine side connector main body 42 interferes with the side surface of the operation rod side connector main body 32, and the side surface of the operation rod side connector main body 32 is pushed open, The operation rod side connector main body 32 is put on the connector main body 42. At this time, since the contact terminal 35 protrudes downward, the contact terminal 35 is quickly brought into pressure contact with the bulging portion of the receiving terminal 45, and continuity is measured. However, when the engaging portion 33 in the free state is inclined as described above, the engaging portion 33 does not fit into the recessed portion 432 of the engaging receiving portion 43, but rather is caught by the upper edge of the recessed portion 432 (see FIG. 14).

  However, the engaging portion 33 has a permanent magnet at the bottom and does not attract the engaging receiving portion 43 made of nonmagnetic metal, but tries to attract the magnetic force attracting bottom portion 431 made of only magnetic metal. Then, the posture tilted by itself is corrected, and it tries to fit into the recess 432 (see the arrow shown in the recess 432 in FIG. 13). The engaging portion 33 whose posture has been corrected in this manner is attracted relatively to the magnetically attracted bottom portion 431 whose position is fixed, and is completely fitted into the concave portion 432 in a state where the operating rod side wire 31 is pulled out from the pulling groove 433. Get stuck. The actual timing at which the engaging portion 33 fits into the recess 432 of the engaging receiving portion 43 depends on the degree of freedom of the engaging portion 33 and the initial posture, but the operating rod side connector 3 is attached to the engine side connector 4. In the process, the engaging portion 33 corrects its posture and fits into the recess 432.

  When the operation rod side connector 3 is completely attached to the engine side connector 4, as shown in FIGS. 15 and 16, the operation rod side latching claw 321 is inserted into the engine side latch groove 422 and the engine side latch. The claws 421 are engaged with the operating rod side latching grooves 322, respectively, and the operating rod side connector 3 is prevented from being separated from the engine side connector 4. In addition, since the engaging portion 33 that is completely fitted in the concave portion 432 of the engaging receiving portion 43 is adsorbed to the magnetic force adsorption bottom portion 431, the operation rod does not come out of the concave portion 432 even if a slight impact is applied. The connection state between the side wire 31 and the engine side wire 41 is maintained. However, since the connection between the engagement portion 33 and the engagement receiving portion 43 relies only on the adsorption of the magnetic force adsorption bottom portion 431 of the engagement portion 33, when the operating rod side connector 3 is removed from the engine side connector 4, It is easily released. Thus, according to the present invention, the combination of the engaging portion 33 having magnetic force and the engaging receiving portion 43 having the magnetic force adsorption bottom portion 431 enables easy and accurate connection and separation between the operation rod side wire 31 and the engine side wire 41. Realized.

It is a top view showing a part of shoulder-type brush cutter to which the present invention is applied. It is a side view showing a part of brush cutter of this example. It is a fragmentary sectional top view showing the connection separation structure in the state where the operation rod side connector was attached to the engine side connector. It is a partial cross section side view showing the connection separation structure in the state where the operation rod side connector was attached to the engine side connector. It is a horizontal sectional view of the operating rod side connector. It is a side view of an operation rod side connector. FIG. 6 is an enlarged cross-sectional view taken along line AA in FIG. 5 of the operating rod side connector. It is a top view of an engine side connector. It is a side view of an engine side connector. It is a front view of an engine side connector. FIG. 6 is a partial cross-sectional front view showing a stage where an operation rod side connector and an engine side connector are completely separated. FIG. 6 is a partially enlarged perspective view showing a stage where an operation rod side connector and an engine side connector are completely separated. FIG. 6 is a partial cross-sectional front view showing a stage in which the operation rod side connector starts to be attached to the engine side connector. It is a partial expansion perspective view showing the stage which started attaching the operation rod side connector to the engine side connector. FIG. 6 is a partial cross-sectional front view showing a stage in which the operating rod side connector is completely attached to the engine side connector. FIG. 5 is a partially enlarged perspective view showing a stage where the operation rod side connector is completely attached to the engine side connector.

Explanation of symbols

1 Operation
11 Grip
12 throttle
13 Stop switch 2 Engine
21 Engine cover 3 Connector on the operation side
31 Operation side wire
32 Operation side connector body
33 Engagement part
34 Operation side lead wire
35 Contact terminal 4 Engine side connector
41 Engine side wire
42 Engine side connector body
43 Engagement receiver
431 Magnetic adsorption bottom
432 recess
433 drawer groove
44 Engine side lead wire
45 Receiving terminal

Claims (4)

In a brush cutter in which an operation rod with a rotary blade attached to the tip and the engine can be connected and separated, an operation rod side connector to which an operation rod side wire extending from a throttle provided in the operation rod is connected is connected to the engine side extending from the engine. It is detachable from the engine side connector to which the wire is connected. The operation rod side connector is attached to the end of the operation rod side wire with an engaging portion having magnetic force, and the inside of the operation rod side connector body opened downward. The engine-side connector is provided with an engagement receiving portion in which the operation groove-side wire lead-out groove extends from the recess having the magnetic force adsorption bottom portion at the end of the engine-side wire. A brush cutter characterized in that the engagement receiving portion projects forward and backward inside the engine-side connector body whose upper side is open. The operation rod side connector connects the operation rod side lead wire extending from the stop switch attached to the operation rod with the operation rod side wire, and the engine side connector connects the engine side lead wire extending from the engine with the engine side wire. The operation rod side connector connects the operation rod side lead wire to the contact terminal that protrudes downward from the inside of the operation rod side connector body, and the engine side connector extends upward from the inside of the engine side connector body. The brush cutter according to claim 1, wherein an engine-side lead wire is connected to the receiving terminal protruding toward the front. The brush cutter according to claim 1 or 2, wherein the operating rod side connector supports the operating rod side connector main body on the operating rod side wire in a free state. 3. The brush cutter according to claim 1, wherein the engine-side connector is provided with the engine-side connector main body fixed to a connection portion of the engine or the operation rod.

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