JP4997134B2 - Back working machine - Google Patents

Description

  The present invention relates to a backpack type work machine.

  2. Description of the Related Art Conventionally, there is known a backpack-type work machine capable of performing a predetermined work (for example, a spraying work) in a state where an operator carries the back.

In such a backpack-type working machine, the upper end portions of the pair of left and right backpack belts that are hung on both shoulders of the worker are attached to the upper end portion of the front surface that can face the back of the worker in the liquid tank. Aspects are known (see Patent Document 1 below).
JP 2003-126737 A (see FIG. 2)

  If it is the above-mentioned aspect, since the upper end part of the backpack belt is attached to a place far from the center of gravity of the tank, the center of gravity cannot be balanced, and the tank falls down in the direction away from the operator's back, and the entire work machine However, there is a problem in that it is difficult to obtain a good back comfort and the work efficiency is inferior, trying to move away from the worker's body.

  In order to solve such a problem, an aspect in which the upper end portion of the backpack belt is attached to the central portion at the top portion of the tank is also known, but usually a charging port is provided at the central portion at the top portion of the tank. For this reason, the upper end of the back belt is attached to a position where the insertion port is avoided, that is, a position sandwiching the insertion port.

  In such an aspect, the larger the opening size of the insertion port, the larger the separation distance between the upper ends of the backpack belt inevitably. Therefore, the worker bends while carrying the back on his back or shakes his / her body from side to side. In this case, the backpack belt is easily detached from the shoulder, which impairs workability.

  The present invention has been made paying attention to such problems, and the main purpose is to obtain a good back comfort, and it is difficult for the back belt to slip off the shoulder, contributing to an improvement in work efficiency. It is to provide a backpack type work machine.

  That is, the backpack-type working machine of the present invention includes a tank that contains a predetermined liquid or granular material and has an inlet at the center of the top, and a pair of left and right backpack belts that are hung on the shoulders of the operator. A rotating arm body that rotates in a height direction with respect to the tank, with a position close to the center of gravity of the tank as a fulcrum at a position sandwiching the tank inlet. A rotating arm body is provided at a grip portion that can be gripped, and a pair of belt mounting portions that are provided at positions closer to the center of the tank than the rotating fulcrum, and to which the upper end portions of the pair of backpack belts can be respectively attached. It is characterized by being provided with.

  If this is the case, the upper end of the back belt is attached to a position close to the center in the left-right width direction of the tank via the rotating arm body, in other words, closer to the center of gravity of the tank. It is easy to balance the center of gravity in the state of being carried on the back, preventing the tank from falling in a direction away from the operator's back, and obtaining a good back comfort. In addition, since the pair of belt mounting portions of the rotating arm body are provided at positions closer to the center of the tank than the rotating fulcrum of the rotating arm body, the medicine is charged into and discharged from the tank. Even when the opening size of the insertion port is set to be large so that the distance between the upper end portions of the backpack belt can be set smaller than the opening size of the insertion port, Even if you bend in the backpacked state or swing your body to the left or right, the backpack belt is difficult to come off the shoulder, and the workability is excellent.

  Furthermore, the pivot arm body pivots in the height direction with respect to the tank, so that the support point of the upper end portion of the back belt, that is, the belt mounting portion moves in the height direction while pivoting with respect to the tank. Therefore, the movable range of the backpack belt with respect to the tank and the backpack frame can be expanded in the height direction, and the work of passing the shoulder through the backpack belt (work to carry) can be performed easily and smoothly.

  In addition, by grasping the grip portion of the rotating arm body, the tank itself can be carried by hand.

  As described above, according to the present invention, it is possible to provide a backpack-type working machine that can obtain a good back comfort, and that the backpack belt is less likely to slip off the shoulder and contributes to an improvement in work efficiency.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the backpack-type working machine 1 according to the present embodiment includes a pump 2, an engine 3 that is a driving source of the pump 2, a chemical liquid tank 4 that stores liquid to be sprayed or sprayed, and an operator's On the shoulder belt 5 for hanging on the shoulder, the back frame 6 for supporting the pump 2, the engine 3 and the chemical liquid tank 4, the recoil starter 7 for starting the engine 3 by pulling a grip (not shown), and the top 41 of the chemical liquid tank 4 A rotating arm body 8 which is attached and can be rotated in the vertical direction with respect to the chemical liquid tank 4 is provided. The backpack-type working machine 1 of the present embodiment is a so-called backpack-type power sprayer that can perform a spraying work with an operating rod (not shown) provided with a spray nozzle at the tip in one hand.

  Since well-known pumps, engine 3, backpack frame 6 and recoil starter 7 are applied, detailed description thereof is omitted.

  The chemical liquid tank 4 has a loading port 41a at the center of the top 41, and a cap 42 that covers the loading port 41a is detachably attached. A rotating arm body support portion 43 that rotatably supports the rotating arm body 8 is provided on both left and right sides of the insertion port 41a.

  As shown in FIGS. 2 to 4 and the like, the rotating arm body support portion 43 includes a placement piece 431 attached in a state of being placed on the top portion 41 of the chemical liquid tank 4, a projection protruding upward from the placement piece 431, and a rotation. And a support body 432 having a support hole 432a for supporting the horizontal shaft 812 of the moving arm body 8. The support hole 432a of the rotating arm body support portion 43 is set so as to be positioned on the vertical line of the center of gravity of the chemical solution tank 4. In the present embodiment, an integrally molded product made of resin is applied as the rotating arm body support portion 43, and the mounting piece 431 is passed through the rotation arm body support portion 43 in the height direction to the support hole 432a. A communication hole 433 that communicates is provided, and the horizontal shaft 812 of the rotating arm body 8 is inserted into the communication hole 433 from the mounting piece 431 side, and the opening width of the communication hole 433 is expanded by elastic deformation. By elastically returning when fitted into the support hole 432a, the horizontal shaft 812 is rotatably supported by the support hole 432a in a state where the horizontal shaft 812 does not fall out of the communication hole 433.

  As shown in FIGS. 3 and 4, the rotating arm body 8 is supported by a rotating arm body support portion 43 so that one end portion thereof is turnable, and a pair of left and right opposing upright portions facing each other with the insertion port 41 a therebetween. 81 and a connecting portion 82 for connecting the other end portions of the opposing upright portions 81 to each other.

  Each opposed upright portion 81 includes a pair of opposed walls 811 facing one end (rotation base end) in the lateral width direction, and a horizontal shaft 812 provided between the opposed walls 811. In the present embodiment, an integrally molded product made of resin is applied as the facing upright portion 81.

  The connection portion 82 is mainly composed of a rod-shaped steel material 82A having both side end portions attached to the other end portion of each opposing upright portion 81, and a center region in the width direction is used as a grip portion 821 that can be gripped by an operator. While functioning, the end portion side region is functioned as a belt attaching portion 822 to which each upper end portion 5a of the pair of left and right backside negative belts 5 can be attached (see FIG. 3). In the present embodiment, an end holding portion (not shown) for attaching the end of the connecting portion 82 to the other end of each opposing upright portion 81 so as not to be pulled out is provided. The end holding portion has an insertion hole in which the end portion of the connection portion 82 can be press-fitted, and the end portion of the connection portion 82 is held in such a manner that the end portion of the connection portion 82 cannot be pulled out by press-fitting the end portion of the connection portion 82 into the insertion hole. To do. Therefore, the opposing upright portion 81 and the connecting portion 82 can be integrally attached without requiring screws or screws.

  The grip portion 821 sets a separation distance from the horizontal axis 812 so that an operator's hand does not interfere with the cap 42 of the chemical liquid tank 4 in a state where the grip portion 821 is gripped, and the steel material 82A is formed by a grip cover body (not shown). Is covered. In the present embodiment, a resin support member 82B is attached to a central region in the width direction that functions as the grip portion 821 in the steel material 82A so that the grip portion 821 can be easily gripped.

  Each belt attaching part 822 is comprised by the edge part side area | region inclined from the edge part toward the width direction center area | region among 82 A of steel materials.

  The rotating arm body 8 is formed by integrally assembling the pair of opposed upright portions 81 and the connecting portion 82 described above, and has a substantially U-shape or U-shape.

  The rotating arm body 8 of this embodiment includes a misalignment prevention means 83 that prevents the upper end portion 5a of the backpack 5 attached to the belt attachment portion 822 from being displaced in the left-right direction. In the present embodiment in which the portion exposed between the support member 82B of the grip portion 821 and the other end portion of each opposing upright portion 81 of the steel material 82A functions as the belt attachment portion 822, the belt attachment Step portions 831 and 832 are formed at the boundary between the portion 822 and the support member 82B and the boundary between the belt attaching portion 822 and the other end portion of the opposed upright portion 81, and these step portions 831 and 832 are formed on the back belt 5. By contacting the left and right side edges of the upper end 5a, the upper end 5a of the backpack 5 is prevented from being displaced in the left-right direction. That is, the misalignment prevention means 83 is configured by a step 831 formed between the belt mounting portion 822 and the grip portion 821 and a step 832 formed between the belt mounting portion 822 and the opposed upright portion 81. Yes. Note that the distance between the step portions 831 and 832 may be a distance that allows the upper end portion 5a of the backpack belt 5 to be accommodated without a substantial gap, or a distance that allows the upper end portion 5a of the backpack belt 5 to be accommodated with some play. It doesn't matter.

  Moreover, each opposing upright part 81 is coat | covered with the cover body for opposing upright parts which is not shown in figure.

  Each backpack 5 is formed by laminating a relatively wide cushion body 51 and a relatively narrow belt body 52 in the thickness direction. In this embodiment, the cushion body 51 and the belt main body 52 are integrally attached so as not to be separated from each other by stitching at a predetermined pitch. Further, the upper and lower ends of the belt main body 52 are extended upward and downward from the upper and lower ends of the cushion body 51, respectively, and the upper end 5 a of the belt main body 52, that is, the upper end 5 a of the backpack belt 5 is rotated. The lower end portion of the belt main body 52, that is, the lower end portion 5 b of the backpack belt 5 is attached to the lower portion of the backpack frame 6.

  The backpack-type working machine 1 having such a configuration is such that the upper end portion 5a of the backpack belt 5 is not fixed to the chemical solution tank 4 and moves up and down while rotating. Therefore, the backpack belt 5 according to the physique of the operator and the carrying rod. The space between the backpack frame 6 and the chemical tank 4 expands in the height direction, so that it is easy to pass the hand when carrying it. In the state of carrying the back, as shown in FIG. 5, since the upper end 5a of the back belt 5 is not fixed to the chemical tank 4, the support position of the back belt 5 is stable regardless of the physique and the preference of the carrying position. In addition, since the upper end portion 5a of the back belt 5 pulls a position close to the center of gravity of the chemical liquid tank 4 via the rotating arm body 8, a direction in which the chemical liquid tank 4 falls backward (from the back of the operator). No force acts in the direction of leaving), and a good back comfort that fits the back can be obtained.

  Further, the belt attaching portion 822 of the rotating arm body 8 is provided at a portion closer to the central side in the left-right width direction of the chemical liquid tank 4 than the rotating fulcrum (horizontal axis 812) of the rotating arm body 8. Even if the opening dimension of the charging port 41a of the chemical liquid tank 4 is ensured to be large, the separation dimension between the belt attaching parts 822, that is, the separation dimension between the upper end parts 5a of the back belt 5 can be reduced. Even when the person bends while carrying on his back or swings his / her body from side to side, the back belt 5 is difficult to come off the shoulder, and the workability is excellent.

  In addition, by grasping the grip portion 821 of the rotating arm body 8, the chemical tank 4 itself can be carried in a hand-held state, which is convenient.

  The present invention is not limited to the embodiment described in detail above.

  For example, in the above-described embodiment, the rotation arm body is exemplified by a mode in which the pair of opposed upright portions and the connection portion are configured by separate parts. It may be an integral product. In this case, the rotating arm body may be made of resin or metal.

  Moreover, although the horizontal axis which functions as a rotation fulcrum of a rotation arm body was integrally formed in the rotation arm body in the said embodiment, the edge part (rotation base end part) of the rotation arm body was shown. ), A shaft hole into which the shaft can be inserted is formed, and this shaft hole is aligned with the shaft hole of the rotating arm body support portion provided on the top of the tank side, and the shaft is inserted into these shaft holes, You may comprise so that a rotation arm body may rotate about this axis | shaft. In addition, a horizontal axis is provided on the rotating arm body support provided on the top of the tank side, and the end (rotating base end) of the rotating arm body is rotatably supported on the horizontal axis. May be.

  Further, the tank may contain the granular material.

  In order to further improve the back comfort, a back frame that is provided with a cushion material at a portion that can contact the back of the operator may be applied.

  Moreover, in the said embodiment, although the backpack type power sprayer was shown as an example of a backpack type working machine, it is not restricted to this, In a backpack type power duster, a backpack type human power sprayer, or a backpack type battery power sprayer etc. It does not matter. In particular, in a back-loading type human-powered sprayer or the like, it is known that a tank and a backpack frame are integrally made of resin. Also in this case, a rotating arm body is rotatably provided at the top of the tank. That's fine. Furthermore, the back working machine of the aspect which does not comprise a back frame, specifically, the back working machine of the aspect which provides a pump in the inside of a tank and directly bears the tank itself may be sufficient.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The figure which shows typically the state which looked at the backpack type working machine which concerns on one Embodiment of this invention from the side. The principal part enlarged view of the backpack type work machine which concerns on the embodiment. The figure which shows the state which has not attached the backpack belt in FIG. The principal part enlarged view of FIG. The figure which shows typically the state which a rotation arm body rotates according to an operator's physique in the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Backpack type work machine 4 ... Chemical tank 41 ... Top part 41a ... Loading port 5 ... Back belt 5a ... Upper end part 6 ... Backpack frame 8 ... Rotating arm body 812 ... Rotation fulcrum (horizontal axis)
821 ... Grip part 822 ... Belt attachment part

Claims (1)

A backpack-type working machine that includes a tank that contains a predetermined liquid or powder and has an inlet at the center of the top, and a pair of left and right backpack belts that are hung on the shoulders of the operator,
Furthermore, a rotation arm body that rotates in the height direction with respect to the tank with a position close to the center of gravity of the tank at a position sandwiching the tank inlet,
The rotating arm body is provided at a grip portion that can be gripped, and a pair of belt attachments that can be attached to the upper end portions of the pair of backpack belts provided at positions closer to the center of the tank than the rotation fulcrum. A backpack-type working machine characterized by comprising a part.

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