JPH0575467B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a metering device for a backpack-powered spreader used to spread fertilizers and chemicals, and more specifically, the metering device for a backpack power spreader used to spread fertilizers and chemicals, and more specifically, the metering device for a backpack power spreader used to spread fertilizers and chemicals. The present invention relates to a metering device that can easily adjust the discharge amount to a desired value.

[Conventional technology]

In the metering device of a backpack power spreader used to spread fertilizers and chemicals, the metering lever is inserted into a long guide hole in a guide plate and swings vertically in the long guide hole. The amount of spray material discharged from the spray tank is adjusted as a function of the position.

When spraying fertilizers, chemicals, etc. using a power backpack spreader, the appropriate spray rate of the spray material varies depending on the growth conditions and type of the crop, and the spraying conditions such as the type of spray material and spray head, so please set the metering lever to the appropriate position. It is necessary to set it to .

Conventional metering devices are listed below.

(a) A guide slot extends in the vertical direction of the guide plate, a plurality of locking grooves are opened toward the guide slot, and are formed along the longitudinal side edges of the guide slot, and a stopper extends in the guide plate. The metering lever slides through a long hole and is fixed with a screw so that its vertical position can be freely adjusted.The metering lever is prevented from swinging upward by contact with the stopper, and is inserted into the locking groove corresponding to the position of the stopper. Locking,
Retained.

(b) The guide plate is provided with an elongated guide hole for the metering lever and a sliding groove for the stopper extending parallel to this, and the stopper is fixed with a screw so that its vertical position in the sliding groove can be freely adjusted. The upper limit of the lever is regulated by a stopper (eg, Japanese Utility Model Application No. 59-160322 and Japanese Utility Model Application No. 62-187660).

(c) The guide slot extends in the vertical direction of the guide plate, a plurality of locking grooves are opened toward the guide slot, and are formed along the longitudinal side edges of the guide slot, and the stopper It has a shaft part that is movable in the vertical direction within the elongated hole, and a locking part that removably fits into and locks the locking groove, and the locking part is locked in the predetermined locking groove. , regulates the upper limit of the metering lever (e.g.
60-67155).

[Problem to be solved by the invention]

In the case of (a) and (b), it is necessary to raise the metering lever to the setting position and then fix the stopper with a screw at the position where it contacts the metering lever at that position, making the setting work complicated. Become. In addition, when setting the position of the metering lever, the shutter at the outlet of the spray material tank opens, so it is necessary to set the position of the metering lever when the spray material tank is empty. It is difficult to easily change the setting position of the metering lever.

Furthermore, the stopper can be fixed or moved by turning a screw, but since the stopper is a rigid body and is fixed to the guide plate with screws, when the engine of the backpack-powered spreader is operating, the vibrations of the engine are guided. The problem is transmitted to the stopper through the plate, making it difficult to secure the stopper fixing screw with one hand when carrying the power spreader on your back. In particular, when the operator is carrying the power spreader on his or her back, the guide plate is
These screws are located at the rear of the side of the worker, and operation of such screws becomes complicated when the power spreader is carried on the back of the worker.

In the case of (c), the stopper requires a shaft part that can move freely within the guide slot and a locking part that is assembled into the guide slot and can be detached from the locking groove, so the number of parts is reduced. increase

Furthermore, in all cases (a), (b), and (c), during the swinging operation of the metering lever in the guide slot, the metering lever gets caught in the locking groove in the middle, making the operation complicated.

The object of the invention as claimed in claim 1 is to enable the setting position of the metering lever to be freely adjusted even when the spray material is contained in the spray material tank, and to facilitate the adjustment work even when the spray material tank is empty. To provide a metering device for a backpack power spreader that has a reduced number of parts, does not require screw operations, and allows the set position of a metering lever to be easily adjusted with one hand even when the backpack power spreader is carried on the back. That's true.

A further object of the invention is to provide a metering device for a backpack power spreader in which the lever holding member is stably held in the effective position and the ineffective position.

It is a further object of the present invention to provide a metering device for a backpack power spreader in which the operability of the lever holding member is improved.

[Means to solve the problem]

The invention will be described using reference numerals in the drawings that correspond to the embodiments.

The metering device of the backpack power spreader according to the invention of claim 1 includes a metering lever 30 that swings vertically to adjust the amount of spray material discharged from the spray tank 16, and a metering lever 30 formed on the guide plate 24 for adjustment. A guide elongated hole 26 through which the metering lever 30 is inserted and guides the swinging of the metering lever 30.
, a stopper part 56 that restricts the upward swinging of the metering lever 30, and a recess 60 that is formed on the lower side of the stopper part 56 and that locks the metering lever 30. It has a plurality of lever holding members 50 arranged along the side edge and pivotally supported to be tiltable toward the guide elongated hole 26 side and the opposite side thereof.

In the metering device for a backpack power spreader according to claim 2, the lever holding member 50 is made of a metal wire whose shape can be elastically deformed, and the amount of elastic deformation is maximum at a substantially upright position with respect to the surface of the guide plate 24. As such, both pivot points of the proximal end are offset from each other.

In the metering device for a backpack power spreader according to claim 3, the lever holding member 50 is curved at the tip in the swinging direction, and the tip is away from the guide plate 24 in the tilted position opposite to the guide elongated hole 26. In the tilted position on the side of the guide elongated hole 26, the tip reaches the side of the guide plate 24.

[Effect]

In the invention of claim 1, one lever holding member 50 is selected and tilted toward the guide slot 26 side. As a result, in this lever holding member 50, the stopper portion 56 crosses the guide elongated hole 26 and is in a closed position. The metering lever 30 comes into contact with the stopper portion 56 when swinging upward in the guide elongated hole 26, and the upper limit is regulated. When the operator releases the metering lever 30 after the metering lever 30 comes into contact with the stopper portion 56 of the lever holding member 50, the elastic force of the metering lever 30 causes the metering lever 30 to press into the concave portion 60 of the lever holding member 50. The metering lever 30 is fitted into the recess 6.
0, and the swinging position is maintained.

In the invention of claim 2, the lever holding member 50 is
Regarding the rocking, the amount of elastic deformation is maximized and the maximum restoring force is generated at a position substantially upright on the surface of the guide plate 24. Therefore, a spring force in the opposite direction is generated in the lever holding member 50 at a position where it is substantially upright with respect to the surface of the guide plate 24, and the lever holding member 50 generates a spring force in the opposite direction.
It is guided and held by a predetermined spring force in the tilted position to the side and to the opposite side. Further, the lever holding member 50 made of a metal wire absorbs vibrations from the engine through elastic deformation, and suppresses transmission of engine vibrations to the metering lever.

In the third aspect of the invention, the tip of the lever holding member 50 that is curved with respect to the swinging direction of the lever holding member 50 is lifted from the guide plate 24 at the tilted position on the opposite side to the guide elongated hole 26, and is raised from the guide plate 24 on the side of the guide elongated hole 26. In the tilted position, it reaches the side of the guide plate 24. The operator can easily operate the lever holding member 50 at the position opposite to the guide elongated hole 26 by grasping the tip part floating from the front surface of the guide plate 24. The tip end is prevented from coming into contact with the guide plate 24 at the position on the guide elongated hole 26 side of the lever holding member 50, and is in an appropriate position.

〔Example〕

Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.

FIG. 2 is a diagram of the backpack power spreader 10 viewed from the rear side. In the backpack power spreader 10, the blower 14 is mounted and fixed on the backpack frame 12, and the spray material tank 16 receives the spray material (not shown) from the top, stores it, and is assembled to the top of the blower 14. It will be done. The engine 18 is attached to the rear side of the blower 14 and drives the blower 14. fuel tank 20
is assembled above the engine 18 and stores the fuel necessary for operating the engine 18. The bent pipe 22 is connected to the outlet of the blower 14, is rotatable in a horizontal angular range, and has a jet head or the like connected to its distal end. A shutter for adjusting the flow rate of the spray material from the spray material tank 16 is provided at the outlet of the lower part of the spray material tank 16 , and the spray material in the spray material tank 16 passes through the shutter and is then sent to the blower 14 . The generated air transports the waste to the bent pipe 22. The scale plate 24 is attached to the lower left side of the backpack power spreader 10, and its front face is directed forward. The metering lever guide elongated hole 26 and the throttle lever guide elongated hole 28 are formed in the scale plate 24 and extend substantially parallel to each other in the longitudinal direction of the scale plate 24, and are located at the tips of the metering lever 30 and the throttle lever 32, respectively. The part has been inserted. Measuring lever 3
0 swings vertically within the metering lever guide elongated hole 26 to adjust the opening degree of the shutter at the outlet of the spray tank 16, and the throttle lever 32
The throttle lever swings vertically within the elongated guide hole 28 to adjust the opening degree of the carburetor throttle valve of the engine 18. The backpack band 34 is attached to the backpack frame 12 at the upper and lower ends, and is passed through the worker's shoulder when the worker carries the backpack power spreader 10 on his or her back.

3, 4, and 5 are a front view, a right side view, and a bottom view of the scale plate 24. The plurality of locking grooves 36 are formed at appropriate intervals along the longitudinal side edge of the throttle lever guide elongated hole 28, open on the side of the throttle lever guide elongated hole 28, and can lock the throttle lever 32. It is. The fully closing locking groove 38 opens into the throttle lever guide long hole 28 at the lowest end of the throttle lever guide long hole 28 and can lock the throttle lever 32. At the locking position of the throttle lever 32,
The throttle valve is fully closed. Each of the locking grooves 36 and the fully closing locking groove 38 is marked with a scale corresponding to the opening degree of the throttle valve. Fully closed locking groove 4
0 opens into the metering lever guide slot 26 at the lowermost end of the metering lever guide slot 26, and can lock the metering lever 30, and the metering lever 30 into the fully closing locking groove 40. In the locked position, the spray tank 16
The exit shutter is fully closed. Support part 4
2 and 44 are cut and raised from the surface of the scale plate 24,
They are arranged along the longitudinal side edge of the metering lever guide elongated hole 26. Fully closing locking groove 40 and support part 4
A scale corresponding to the opening degree of the shutter of the spray tank 16 is written in the notch formed between 2 and 44.

FIG. 6 is a perspective view of the cut and raised portions of the support portions 42, 44. The support parts 42 and 44 are provided with insertion holes 46 and 48 on the lower side and the upper side, respectively.

7 and 8 show the lever holding member 50 in the scale plate 24 to which the lever holding member 50 is assembled.
FIG. 3 is a front view and a bottom view when the holder is tilted toward the side opposite to the elongated hole 26. FIG. 9 and 10 are a front view and a bottom view of the scale plate 24 to which the lever holding member 50 is attached, when the lever holding member 50 is tilted toward the elongated hole 26 side. support part 42,
44, a lever holding member 50 is attached to each pair of elongated holes 26.
It is assembled so that it can be freely tilted toward the side and the side opposite to the elongated hole 26.

FIG. 1 is a perspective view showing in detail how the lever holding member 50 is assembled to the supporting parts 42 and 44. The lever holding member 50 is made of a metal wire such as spring steel, and its shape can be elastically deformed. The first proximal end 52 and second proximal end 54 of the lever holding member 50 are inserted into the insertion holes 46 and 48, respectively, so as to be on the lower side and the upper side in the upright direction of the support parts 42 and 44, respectively. supported. Lever holding member 50
A stopper portion 56 that largely protrudes in the width direction of the metering lever guide elongated hole 26 is provided on the tip side of the metering lever guide elongated hole 26 , and a stopper portion 56 that protrudes largely in the width direction of the metering lever guide elongated hole 26 , and a stopper portion 56 that is located below the stopper portion 56 in the vertical direction of the metering lever guide elongated hole 26 . A protruding portion 58 is formed in the width direction of the stopper portion 56 to have a smaller protrusion amount than the stopper portion 56 and to maintain a gap slightly smaller than the diameter of the metering lever 30 with the inner edge of the metering lever guide elongated hole 26. . The recess 60 is formed between the stopper part 56 and the protrusion 58, and is capable of locking the metering lever 30. There is a bending point 62 near the tip of the stopper portion 56, which allows the stopper portion 56 to
As shown in FIGS. 8 and 10, the tip part of is raised from the front surface of the scale plate 24 in the tilted position on the side opposite to the elongated hole 26, and rises from the side surface of the scale plate 24 in the tilted position on the side of the elongated hole 26. It is reaching towards the direction.

FIG. 11 shows a state in which the lever holding portion 50 is swung from a tilted position on the side opposite to the elongated hole 26 to a tilted position on the side of the elongated hole 26. The first base end portion 52 and the second base end portion 54 are biased in the upright direction of the support portions 42 and 44 by being inserted into the insertion holes 46 and 48 . Therefore, in the process of swinging the lever holding member 50 from the tilted position on the side opposite to the elongated hole 26 to the upright position,
In the process of swinging from the tilted position on the elongated hole 26 side to the upright position, the distance between the first base end 52 and the second base end 54 in the substantially planar direction of the lever holding member 50 is increased; The amount of deformation increases.
As a result, the maximum restoring force is generated in the lever holding member 50 in the upright position, and the lever holding member 50 tilts toward the elongated hole 26 side and the side opposite to the elongated hole 26 from the upright position in a snap action manner. and anti-elongated hole 26
It is held in position by a predetermined spring force.

In adjusting the setting position of the metering lever 30, 1
lever holding members 50 are selected, and the elongated hole 26
tilted to the side. When the lever holding member 50 swings, the tip of the stopper part 56 curves in the swinging direction and floats above the front surface of the scale plate 24, as shown in FIG. By grasping this tip, the lever holding member 50 can be easily operated. Furthermore, when the lever holding member 50 swings, the lever holding member 50 moves toward the elongated hole 26 side due to a snap action action caused by the restoring force due to the elastic deformation of the lever holding member 50 as explained in FIG. The rocking operation becomes smoother,
Further, the lever holding member 50 is stably held on the elongated hole 26 side by a predetermined spring force of the lever holding member 50 itself. Lever holding member 5 to the elongated hole 26 side
In the zero tilted position, the stopper part 56 traverses the metering lever guide elongated hole 26 and closes it. Projection 58
has a smaller lateral protrusion amount than the stopper portion 56, and can pass the metering lever 30 between it and the side edge of the metering lever guide slot 26 without closing the metering lever guide slot 26. form a gap. The metering lever 30 comes into contact with the stopper portion 56 when it swings upward in the metering lever guide elongated hole 26, and its upper limit is regulated. When the operator releases the metering lever 30 after the metering lever 30 comes into contact with the stopper portion 56, the metering lever 30 is fitted into the recess 60 by the elastic force of the metering lever 30, and thereby , the metering lever 30 is locked in the recess 60 and held in the swinging position. The metal wire absorbs vibrations from the engine through elastic deformation, and the metering lever 30
This suppresses the transmission of engine vibration to the metering lever 30 and the recess 60, thereby suppressing abrasion of both the metering lever 30 and the recess 60 due to their collision. When the lever holding member 50 is in the tilted position toward the elongated hole 26, the curved portion on the distal end reaches the lateral side of the scale plate 24, as shown in FIG. This prevents the plate 24 from coming into contact with the oblong hole 26 side, and the reversing operation can be easily performed by simply placing a finger lightly on the stopper portion 56.

〔Effect of the invention〕

In the invention of claim 1, the lever holding member is tilted toward the guide elongated hole and the opposite side, and the metering lever is brought into contact with the stopper portion of the lever holding member tilted toward the guide elongated hole. The upper limit of the swing position is regulated, and the metering lever is locked in the recessed portion immediately below the stopper portion to bring the metering lever to the set position. Since the lever holding member can be swung with one finger, the setting position of the metering lever can be adjusted even when the backpack-powered spreader is carried on the back and there is material to be spread on the backpack-powered spreader. It can be done easily and efficiently.

In the invention of claim 2, the lever holding member made of metal wire absorbs vibrations from the engine and suppresses transmission of engine vibrations to the metering lever, so that wear of the lever holding member and the metering lever due to vibration is reduced. can be suppressed. In addition, the lever holding member is
Since the position is almost upright with respect to the surface of the guide plate, it tilts toward the guide slot side and the opposite side in a snap action manner, improving operability and eliminating the need for fingers during operation, which was the case in the past. In addition to suppressing the occurrence of pain, the lever holding member is held in the oblong guide hole side and the tilted position on the opposite side by a predetermined spring force. Improved stability.

In the invention according to claim 3, the curved tip of the lever holding member is separated from the front surface of the guide plate at the tilted position on the opposite side of the guide slot of the lever holding member, and is separated from the front surface of the guide plate at the position on the side of the guide slot. It reaches the sides of the board. Therefore, the operator can grasp and operate the floating tip of the lever holding member, improving the operability of the lever holding member while holding the lever at the position on the guide slot side of the lever holding member. By avoiding contact between the member and the guide plate, it is possible to ensure an appropriate position on the side of the guide slot.

[Brief explanation of the drawing]

The drawings relate to embodiments of the present invention, and FIG. 1 is a perspective view showing details of how the lever holding member is assembled to the support part, FIG. 2 is a view of the backpack power spreader as seen from the rear side, and FIG. 3 , Figures 4 and 5 are a front view, right side view, and bottom view of the scale plate, Figure 6 is a perspective view of the cut-and-raised part of the support part, and Figures 7 and 8 are the lever holding member assembled. Figures 9 and 10 show a front view and a bottom view when the lever holding member is tilted toward the side opposite to the elongated hole in the scale plate with the lever attached. A front view and a bottom view when the lever is tilted toward the hole side, and FIG. 11 is a diagram showing a state when the lever holding member is swung from a tilted position on the side opposite to the long hole to a tilted position on the side of the long hole. 10...Backpack power spreader, 16...Spray material tank, 24...Scale plate (guide plate), 26...Measuring lever guide slot (guide slot), 30...Measuring lever,
50... Lever holding member, 56... Stopper part,
60... Concavity.

Claims (1)

[Scope of Claims] 1. A metering lever 30 that swings vertically to adjust the amount of spray material discharged from the spray tank 16; A guide elongated hole 26 that guides the swinging of the metering lever 30, a stopper portion 56 that restricts the upward swinging of the metering lever 30, and a stopper portion 56 that is formed on the lower side of the stopper portion 56 to prevent the metering lever 30 from moving upward. A plurality of lever holding members 50 are arranged along the longitudinal side edge of the guide slot 26 and are pivotally supported so as to be tiltable toward the guide slot 26 side and the opposite side thereof. A metering device for a backpack power spreader, comprising: 2. The lever holding member 50 is made of a metal wire whose shape can be elastically deformed, and both pivot points at the base end are arranged so that the amount of elastic deformation is maximum at a substantially upright position with respect to the surface of the guide plate 24. 2. The metering device for a backpack power spreader according to claim 1, wherein the metering devices are offset from each other. 3 The lever holding member 50 is curved at its tip in the swinging direction, and in the tilted position opposite to the guide slot 26, the tip rises from the guide plate 24, and in the tilted position on the guide slot 26 side. 3. The metering device for a backpack power spreader according to claim 2, wherein the tip reaches a side surface of the guide plate 24.