JP2007038116A - Shoulder type working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shoulder type working machine in which the number of components is reduced to facilitate the assembly and the shouldering property is improved. <P>SOLUTION: The shoulder type working machine 1 is provided with a shoulder frame 10 having a 1st back contact surface 18, a pipe 26 with plate which is attached to the end part of the shoulder frame 10 to be rotatable and a liquid tank 12 fixed to the pipe 26 with plate. A rotary shaft for rotating the pipe 26 with plate is arranged on a recessed part 36 provided on a part adjacent to the shoulder frame 10. The liquid tank 12 has a 2nd back contact surface 34 in succession to the 1st back contact surface 18 of the shoulder frame 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a backpack-type working machine equipped with a liquid tank.

Conventionally, in a backpack-type working machine equipped with a liquid tank such as a backpack-type power sprayer, in order to improve the backpacking comfort such as the back comfort and work comfort when the worker takes a forward leaning posture, Has been devised so that the back support surface, which is the back side surface of the operator, can be bent (see, for example, Patent Document 1 below).
No. 7-8047

  However, the backpack-type working machine described in Patent Document 1 includes an upright portion of a gantry that hits the back of an operator, composed of two upper and lower plate-like members, and these members are connected to each other so as to be rotatable. The surface can be bent. In such a configuration, it is necessary to fix the liquid tank to the upper plate member of the upright portion, and there is a problem that the assembly becomes complicated. Further, in such a backpack type work machine, it has been required to further improve the backpackability.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a backpack-type working machine that reduces the number of parts, facilitates assembly, and further improves backpackability. .

  To achieve the above object, according to the present invention, in a backpack-type working machine (1) having a liquid tank (12), a backpack frame (10) having a first back surface (18) and a backpack frame (10 And a fixing member (26) pivotally supported at the upper end of the liquid tank (12), and the fixing member in the recess (36) provided in a portion of the liquid tank (12) adjacent to the back frame (10). The liquid tank (12) is fixed to the fixing member (26) so that the rotation shaft of (26) is arranged, and the liquid tank (12) is connected to the first back support surface ( 18) having a second backing surface (34) continuous with the latter. In the present specification and claims, the terms indicating the left, right, front, back, up, down, etc. directions are based on the state in which the worker stands upright with the backpack-type work machine (1) on the back. The front of the worker is defined as “front”.

  In the backpack type work machine (1) according to the present invention, the backpack type work is performed by the first back support surface (18) of the back frame (10) and the second back support surface (34) of the liquid tank (12). The back support surface as a machine (1) is comprised. The liquid tank (12) is coupled to the back frame (10) through a plate-like member so as to be rotatable. Therefore, the 2nd back support surface (34) can be bent with respect to the 1st back support surface (18), and implement | achieves favorable backpacking property.

  In the above configuration, since the surface of the liquid tank (12) itself is used as a back support surface, it is not necessary to divide the back frame (10) into a plurality of parts as in the prior art, and a simpler configuration. With this, good backpacking due to bending is secured. In the backpack type work machine (1) of the present invention, the liquid tank (12) is in direct contact with the operator's back. Therefore, according to the backpack-type working machine (1) of the present invention, the center of gravity of the liquid tank (12) comes closer to the operator's back as compared with the conventional backpack-type working machine, and the backpacking property is further improved. .

  The backpack-type working machine (1) preferably further includes a buffering means (38) for elastically limiting the rotation of the liquid tank (12) via the fixing member (26). According to this configuration, it is possible to prevent the liquid tank (12) from rotating suddenly by the buffer member.

  It is desirable that the back frame (10) further has a stopper (40) that restricts its rotation by abutting against the liquid tank (12). According to this configuration, since the liquid tank (12) does not rotate excessively, the center of gravity does not go too far forward. Moreover, since the stopper (40) is formed integrally with the backpack frame (10), the number of parts of the backpack type work machine (1) does not increase.

  The backpack-type working machine (1) includes a backrest member (48) that covers the first backrest surface (18) of the backpack frame (10) and the second backrest surface (34) of the liquid tank (12). It is desirable to further comprise. According to this configuration, since only the back support member (48) covering the first back support surface (18) and the second back support surface (34) is in contact with the operator's back, the back bearing is further improved. Can be improved. Moreover, since the mechanism for bending can be covered, the beauty of the backpack type work machine (1) is improved.

  In the backpack-type working machine (1) of the present invention, the surface of the liquid tank (12) itself is used as a back support surface, and a plurality of plate-like members are not used. Secures a strong back. That is, according to the present invention, the backpack frame (10) is not constituted by a plurality of plate-like members, and a backpack-type working machine (1) that can be easily assembled with a small number of parts can be realized. In the backpack type work machine (1) of the present invention, the liquid tank (12) is in direct contact with the operator's back. Therefore, the center of gravity of the liquid tank (12) comes closer to the operator's back as compared with the conventional backpack-type working machine, and the backpacking property is further improved.

  Hereinafter, preferred embodiments of a backpack type working machine according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is an exploded perspective view of a backpack type working machine 1 according to the present embodiment. The backpack-type working machine 1 is a power sprayer that is used while being carried on the back of an operator and sprays liquid chemicals onto agricultural products and the like. Accordingly, the working machine 1 includes a back frame 10 and a liquid tank 12 for storing a liquid medicine. The chemical | medical agent in the liquid tank 12 is attracted | sucked by the liquid pump (not shown in figure) mounted in the back frame 10, and is sprayed from the spray nozzle of the front-end | tip through a spray hose.

  As shown in FIG. 1, the backpack 10 of the backpack-type working machine 1 includes a backrest portion 14 that is a plate-like member facing the operator's back, and a pedestal portion 16 provided behind the backrest portion 14. It is formed integrally. The front surface of the back pad 14 is a first back pad 18 that faces the operator's back. Further, the back frame 10 is provided with a pair of waist pads 20 that extend forward from the left and right outer edges of the back frame 10 so as to obtain a sense of stability on the left and right when carrying the back.

  A device such as an internal combustion engine for driving a liquid pump for spraying the liquid in the liquid tank 12 and a liquid pump is mounted on the gantry 16 of the backpack frame 10. The upper surface of the gantry 16 is a mounting surface on which the liquid tank 12 is mounted.

  On the upper side of the backrest portion 14 of the backpack frame 10, a columnar support portion 22 extending upward in the center is formed integrally with the backrest portion 14, and a pair of columnar portions 24 is formed from the side surface of the columnar support portion 22. Extends from side to side. As shown in FIGS. 2 and 3, a cylindrical portion 28 of a pipe with a plate (fixing member) 26 is rotatably fitted to each column portion 24 to constitute a hinge.

  The plate-equipped pipe 26 includes the cylindrical portion 28 and a plate-shaped portion 30 that is formed integrally with the cylindrical portion 28 along the axial direction of the cylindrical portion 28. Further, two ribs 32 are provided between the cylindrical portion 28 and the plate-like portion 30 in order to ensure the strength of the pipe with plate 26. The liquid tank 12 is fixed to the plate-like portion 30 of the plate-equipped pipe 26 with bolts or the like. Accordingly, the liquid tank 12 can be rotated or bent with respect to the back frame 10 via the plate-like pipe 26.

  As understood from FIGS. 2 and 3, the liquid tank 12 is provided with a recess 36 in a portion adjacent to the backpack frame 10 along the lower end of the second back surface 34. The liquid tank 12 is positioned so that the rotation axis of the pipe with plate 26 is disposed in the recess 36. As a result, the liquid tank 12 can be disposed on the front as a whole, and the front surface of the liquid tank 12 is used as the second back support surface 34 that is continuous with the first back support surface 18 of the backpack frame 10. It becomes possible.

  Since the liquid tank 12 is rotatable with respect to the back frame 10 as described above, the second back surface 34 of the liquid tank 12 is the first back of the back frame 10 as shown in FIG. It will be bent with respect to the contact surface 18. This bending position is located at approximately the center in the vertical direction of the backpack-type work machine 1, and corresponds to the substantially center in the vertical direction of the back when the operator carries the backwork-type work machine 1.

  As shown in FIGS. 1 to 3, the backpack 10 has two left and right buffer plates (buffer means) 38 that elastically limit the forward rotation of the plate-equipped pipe 26 and the liquid tank 12. ing. The buffer plate 38 is made of a plate-like spring material such as synthetic resin. One end portions of the two buffer plates 38 are formed side by side with the backrest portion 14 on the first backrest surface 18 side of the upper surface of the columnar portion support portion 22 of the backpack frame 10. The other end of the buffer plate 38 abuts against the surface forming the recess 36 of the liquid tank 12 obliquely from below, and biases the liquid tank 12.

  As shown in FIGS. 1 to 3, the back frame 10 is pivoted forward by the plate-equipped pipe 26 and the liquid tank 12 by striking the liquid tank 12 with the plate-shaped portion 30 of the plate-equipped pipe 26 sandwiched therebetween. It has two left and right stoppers 40 for limiting the above. The stopper 40 has a protrusion-like member on the upper surface of the columnar portion support portion 22 of the back frame 10 in the vicinity of the base of the columnar portion 24 (displaced in the left-right direction from the buffer plate 38). It is configured by being integrally formed. It should be noted that the angle for restricting the forward rotation is preferably determined based on how much forward leaning posture the worker who uses the backpack-type working machine 1 takes. Further, the stopper 40 may directly abut against the liquid tank 12.

  The backward rotation of the plate-equipped pipe 26 and the liquid tank 12 is limited because the mounting surface of the gantry 16 of the backpack 10 serves as a stopper. Therefore, the second back support surface 34 of the liquid tank 12 is not bent rearward from the first back support surface 18 of the backpack 10.

  Further, hooks 44 and 46 for attaching a shoulder belt 42 (only one of which is shown in FIG. 4) for the operator are provided on the left and right sides of the lower portion of the back frame 10 and the upper portion of the liquid tank 12, respectively. The forward bending of the second backrest surface 34 occurs when the operator takes a forward leaning posture and a forward force is applied from the shoulder belt 42 to the liquid tank 12.

  Further, as shown in FIG. 4, the backpack-type working machine 1 is configured so that the backpacking surfaces 18 and 34 of the hard backframe 10 and the liquid tank 12 do not contact the back of the worker. It is preferable to include a back support member 48 made of a flat cushion material that covers the back support surface 18 and the second back support surface 34 of the liquid tank 12. The back support member 48 is fixed by screws at the upper portion of the liquid tank 12, the intermediate portion at the plate-attached pipe 26 portion, and the lower portion at the shoulder frame 10 portion.

  Further, as shown in FIGS. 1 and 4, a step 50 is provided on the side surface of the liquid tank 12 in the horizontal direction. The level difference 50 is located substantially at the center in the vertical direction of the backpack type work machine 1. A rope can be wound around the step 50. At the time of transporting the backpack-type work machine 1, a rope is wound around the step 50 and fixed to a loading platform such as a light truck. At this time, the rotation of the liquid tank 12 can be prevented by fixing the rope.

  As described above, according to the backpack-type working machine 1 according to the present embodiment, the second back support surface 34 can be bent with respect to the first back support surface 18. Therefore, the backpack-type working machine 1 has a back support surface that is bent according to the posture of the worker, and realizes a good backpacking property.

  On the other hand, using the surface of the liquid tank 12 itself as the (second) back support surface 34, a simpler configuration than that obtained by dividing the backpack frame into a plurality of parts as in a conventional working machine. With this, good backpacking due to bending is secured. That is, according to the present embodiment, it is possible to realize the backpack-type working machine 1 that can be easily assembled with a small number of parts. Further, the backpack-type working machine 1 according to the present embodiment adopts a position configuration in which the liquid tank 12 is in direct contact with the operator's back. Therefore, according to the backpack-type working machine 1 according to the present embodiment, the center of gravity of the liquid tank 12 approaches the operator's back as compared to the conventional backpack-type working machine. For the operator, the feeling of being pulled backward is reduced, and the backpacking is further improved.

  Further, as in this embodiment, by arranging a mechanism for rotation in the recess 36 provided in the liquid tank 12, it is possible to realize bending without causing the member to protrude on the surface of the operator. Can do. The mechanism for turning is not necessarily the above-described mechanism. For example, a cylindrical portion is provided on the back frame 10 side, a column portion is provided on the plate-like pipe 26 side, and the column portion of the plate-like pipe 26 is provided. A mechanism that fits into the cylindrical portion of the backpack frame 10 may be used.

  Furthermore, if the back working machine 1 is provided with a buffering means such as a buffer plate 38, the liquid tank 12 is suddenly turned against a sudden operation such as forward tilting, rearward tilting, and holding from the stationary state. Can be prevented from moving. This prevents a sudden forward movement of the center of gravity, and can prevent a fall or the like. The buffer means does not necessarily need to use the buffer plate 38, and for example, a string spring may be used.

  Moreover, in this embodiment, since the stopper 40 is provided, the liquid tank 12 does not rotate excessively. This also prevents the center of gravity from moving too far forward and protects the operator from falling. Note that the force applied from the liquid tank 12 can be evenly received by disposing the stopper 40 at the left and right positions near the base of the cylindrical portion 24.

  As described above, if the first back support surface 18 and the second back support surface 34 are covered with the back support member 48, only the back support member 48 contacts the back of the operator, and thus further. Backpacking can be improved. Moreover, since the mechanism for bending can be covered, the beauty of the backpack type work machine 1 is improved.

  Furthermore, in the backpack-type working machine 1 according to the present embodiment, it is possible to secure a gap between the frame portion 16 of the backpack frame 10 on which devices such as an internal combustion engine are mounted by tilting only the liquid tank 12 forward. So it is easier to maintain.

  In addition, although the backpack-type working machine 1 which concerns on embodiment mentioned above is a power sprayer, backpack-type working machines, such as another backpack-type spreader, may be sufficient as this invention.

It is a perspective view of a backpack type working machine concerning an embodiment of the present invention. It is sectional drawing of the connection part of a backpack frame and a liquid tank in the backpack type work machine which concerns on embodiment. It is sectional drawing of the coupling | bond part of a backpack frame and a liquid tank when bent in the backpack type work machine which concerns on embodiment. 1 is a perspective view of a backpack type working machine according to an embodiment of the present invention with a backrest member attached thereto.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Backpack type work machine, 10 ... Backpack frame, 12 ... Liquid tank, 14 ... Back support part, 16 ... Mount part, 18 ... 1st back support surface, 20 ... Waist pad, 22 ... Cylindrical part support part, 24 ... Cylindrical part, 26 ... Pipe with plate (fixing member), 28 ... Cylindrical part, 30 ... Plate-like part, 32 ... Rib, 34 ... Second back surface, 36 ... Recess, 38 ... Buffer plate (buffer means) ), 40... Stopper, 42... Shoulder belt, 44, 46.

Claims (4)

In the backpack-type working machine (1) having the liquid tank (12),
A backpack frame (10) having a first back surface (18);
A fixing member (26) pivotally supported on the upper end of the back frame (10),
The liquid tank (12) is arranged such that a rotation shaft of the fixing member (26) is disposed in a recess (36) provided in a portion of the liquid tank (12) adjacent to the shoulder frame (10). Is fixed to the fixing member (26),
The backpack-type working machine according to claim 1, wherein the liquid tank (12) has a second backrest surface (34) continuous with the first backrest surface (18) of the backpack frame (10).   The backpack type work machine according to claim 1, further comprising a buffer means (38) for elastically limiting rotation of the liquid tank (12) through the fixing member (26).   The backpack type work machine according to claim 1 or 2, wherein said backpack frame (10) further has a stopper (40) which restricts rotation by abutting against said liquid tank (12).   A back support member (48) covering the first back support surface (18) of the backpack frame (10) and the second back support surface (34) of the liquid tank (12); The backpack type work machine according to any one of claims 1 to 3.

Images