JPH0612844Y2 - Shutter operation device for backpack power spreader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a shutter operating device of a backpack power spreader for spraying sprayed materials such as chemicals, seeds, and fertilizers, and more specifically, to a limit of a swing amount of a shutter lever. At the same time, the present invention relates to a shutter operation device capable of finely adjusting a spray amount.

[Conventional technology]

In the backpack power spreader, the scattered matter is stored in the scattered matter tank, the opening degree of the shutter is adjusted by the swing operation of the shutter lever, and the amount of the scattered matter to be discharged from the scattered matter tank is controlled.

Since the appropriate amount of the sprayed material varies depending on the type of the sprayed material, it is necessary to adjust the swinging position of the shutter lever so that the opening of the shutter is appropriate during the spraying work. .

Therefore, in the conventional backpack power spreader, a stopper is provided so that the position of the shutter lever in the swinging direction can be adjusted freely, and the swinging of the shutter lever is limited by the stopper, so that the maximum opening of the shutter can be changed according to the type of sprayed material. According to.
(Example: Japanese Utility Model Publication No. 59-160322 and Japanese Utility Model Publication 60)
However, even if the shutter opening is the same, the actual amount of sprayed material from the injection nozzle may vary depending on the humidity and the properties of the sprayed material. Therefore, it is necessary to finely adjust the opening of the shutter in order to obtain an appropriate amount of sprayed material.

In the conventional shutter operating device of the backpack power spreader, it is difficult to finely adjust the position of the stopper, and it is almost impossible to finely adjust the opening degree of the shutter. It is difficult to finely adjust the opening of the shutter during the spraying work.

An object of the present invention is to provide a shutter operating device for a backpack power spreader that can easily finely adjust the amount of sprayed material.

[Means for Solving the Problems]

The invention will be described using the reference numerals of the drawings corresponding to the embodiments.

The shutter operating device of the backpack power spreader (10) of this device has the following components (a) to (d).

(A) Increase or decrease the degree of opening to adjust the amount of sprayed material (2
(4) Shutter (28) for controlling the amount of extraction (b) A shutter lever (46) which is connected to this shutter (28) and swings in the guide groove (42) to change the opening of the shutter (28).
In a backpack power spreader having a stopper (54) which is fixed to the guide groove (42) so that the position of the shutter lever (46) in the swinging direction is adjustable and which limits the swinging of the shutter lever (46). (C) Energizing member (64, 72, 76) for urging the shutter lever (46) toward the stopper (54) (d) One of the shutter lever (46) and the stopper (54) is rotatably fitted. The shutter lever (4
Cam (52) that increases or decreases the distance between the two in the swing direction of 6) (Operation) The shutter (28) is linked to the shutter lever (46), and the shutter (28) moves the dust (24) from the dust tank (22). The lead-out amount, that is, the amount of the scattered substance (24) scattered depends on the opening degree of the shutter (28), that is, the swing position of the shutter lever (46) in the guide groove (42).

Prior to the spraying work of the sprayed material (24), the stopper (54) is fixed at a position in the guide groove (42) where an appropriate sprayed amount of the sprayed material (24) is generally obtained.

The operator swings the shutter lever (46) until it is limited by the stopper (54). The shutter lever (46) is biased toward the stopper (54) by the biasing members (64, 72, 76), and the cam (52) attached to one of the shutter lever (46) and the stopper (54). Limits the amount of approach of the shutter lever (46) and the stopper (54) by contact with the other. Thus, the shutter lever (46) is in the swing position separated from the stopper (54) by the distance determined by the rotational position of the cam (52).

When finely adjusting the amount of sprayed material (24), the cam (52) is rotated to change the rotational position of the cam (52). The cam (52)
The shutter lever is driven by the biasing force of the biasing members (64, 72, 76).
While maintaining contact with the other of (46) and the stopper (54), it rotates to increase or decrease the distance between the shutter lever (46) and the stopper (54), which causes the shutter lever (46) to swing. The moving position is slightly changed.

〔Example〕

 The present invention will be described below with reference to the embodiments shown in the drawings.

FIG. 9 is a vertical sectional view showing the internal structure of the backpack power spreader 10. The backpack power spreader 10 includes an impeller 12 that is driven by an engine to generate pressurized air. The fan case 14 is mounted and fixed on the lower horizontal portion of the backpack frame, accommodates the impeller 12 inside, and has a pressurized air passage 16 that extends spirally around the impeller 12 and gradually increases in diameter. Formed,
The pressurized air passage 16 leads to the pressurized air outlet 18 of the fan case 14. The bend tube 20 is bent at a substantially right angle and is rotatably connected at its upper end to the pressurized air outlet 18 in a horizontal angular range. Scatter tank 22 is a fan case
It is disposed on the upper side of 14 and stores a sprayed material 24 such as granular and powdery medicines, fertilizers or seeds. The shutter case 26 is interposed between the fan case 14 and the scattered material tank 22 in the vertical direction, and the shutter 28 is disposed inside the shutter case 26 and is rotatably supported by the shutter case 26. The opening degree is adjusted by the lever 46, and the amount of the scattered matter 24 discharged from the scattered matter tank 22 is adjusted. The shutter cover 30 is arranged in the scattered material tank 22 so as to be separated from the shutter 28 and cover the upper side of the shutter 28. The discharge pipe 32 extends in the downstream range of the pressurized air passage 16 and opens at the upstream and downstream ends below the shutter 28 and in the vicinity of the pressurized air outlet 18, respectively.

FIG. 1 is a structural view of the shutter operating device shown as a partial cross section, and FIG. 2 is a front view of the scale plate 36 of FIG. The bracket 34 is fixed to the lower side portion of the backpack frame of the backpack power spreader 10 at the base end and projects forward from the backpack frame. The scale plate 36 is applied to the tip of the bracket 34,
It is fixed to the bracket 34 by screws 38.

As shown in FIG. 2, the throttle lever guide groove 40
The shutter lever guide groove 42 is provided in parallel with the scale plate 36, and extends substantially vertically. A throttle lever for adjusting the throttle opening of the engine is inserted in the guide groove 40 for the throttle lever. The plurality of arcuate recesses 44 are
They are formed at appropriate intervals along one side edge of the shutter lever guide groove 42. The shutter lever 46 penetrates the shutter lever guide groove 42 at its tip end and is swingable along the extending direction of the shutter lever guide groove 42. The shutter lever 46 is bent at an intermediate portion, and the elasticity of the bent portion pushes the shutter lever 46 against the side edge of the shutter lever guide groove 42 in which the arcuate recess 44 is formed. Therefore, the shutter lever 46 has the arc-shaped recess 44.
When it is fitted in, it is held in the position of the arcuate recess 44 with a predetermined locking force.

FIG. 3 is a perspective view of the tip of the shutter lever 46. The sleeve knob 48 is rotatably fitted to the tip of the shutter lever 46, and is prevented from coming off the shutter lever 46 by a retaining ring 50. The cam 52 is formed integrally with the lower end of the sleeve knob 48 and rotates integrally with the sleeve knob 48 around the axis of the shutter lever 46.

FIG. 4 is a perspective view of the stopper 54. A pair of flanges 56
Is formed at the tip of the stopper 54, and the annular groove 58 is defined between the flanges 56 so as to receive the cam 52 of FIG. Following the lower flange 56, a large-diameter columnar portion 60, a taper portion 61, a shaft portion 62, and a spring portion 64 are sequentially formed from the upper side. The spring portion 64 has an insertion groove 66 inside which the shutter lever 46 can be received, and has elasticity in a direction in which the width of the insertion groove 66 is narrowed. The insertion groove 66 opens downward in the gap 68, and the shutter lever 46 is opened via the gap 68.
Is inserted. The large-diameter cylindrical section 60 has a flat section 70 on one side.
It is possible to fit into the arc-shaped recess 44 while contacting the flat surface portion 70 with the side edge of the shutter lever guide groove 42 which has the arc-shaped recess 44. The shaft portion 62 has a smaller diameter than the width of the shutter lever guide groove 42 at the portion where there is no arcuate recess 44, and the stopper 54 allows the shutter portion to move when the shaft portion 62 is positioned in the shutter lever guide groove 42. The inside of the lever guide groove 42 can be displaced in the extending direction of the shutter lever guide groove 42. FIG. 5 shows a state in which the stopper 54 is displaced in the extending direction of the shutter lever guide groove 42.

The operation of the embodiment will be described.

The shutter 28 is interlocked with the shutter lever 46, and the amount of the sprayed material 24 discharged from the lower portion of the sprayed material tank 22, that is, the amount of the sprayed material 24 is determined by the opening of the shutter 28, that is, the shutter lever guide groove 42. It depends on the swing position of the shutter lever 46.

Prior to the spraying work of the sprayed material 24, the stopper 54 is pulled out forward from the scale plate 36 so that the shaft portion 62 is located in the shutter lever guide groove 42 as shown in FIG. The guide groove 42 is displaced in the extending direction of the shutter lever guide groove 42. Then, in the arc-shaped recess 44 where an appropriate amount of the sprayed material 24 can be generally obtained, the large-diameter cylindrical portion 60 is pushed into the shutter lever guide groove 42 again so that the large diameter cylindrical portion 60 is located in the shutter lever guide groove 42. . When the stopper 54 is pushed into the shutter lever guide groove 42, the tapered portion 61 contacts the edge portion of the shutter lever guide groove 42,
Since the large-diameter column portion 60 is inserted into the arc-shaped recess 44, the pushing is smooth. The large-diameter columnar portion 60 has a flat portion 70 on which a shutter lever guide groove 42 having no arcuate recess 44 is formed.
While being in contact with the side edge of the shutter lever, it is fitted into the arcuate recess 44 and is fixed in the extending direction of the shutter lever guide groove 42.

The operator swings the shutter lever 46 upward while gripping the sleeve-shaped knob 48. The shutter lever 46 is fitted into the insertion groove 66 of the spring portion 64 via the insertion groove 66 and is urged upward by the spring force of the spring portion 64. On the other hand, the cam 52 provided on the sleeve-shaped knob 48 is fitted into the annular groove 58 of the stopper 54 and abuts on the annular groove 58 to limit the amount of approach of the shutter lever 46 to the stopper 54. In this way, the shutter lever 46 is in the swing position separated from the stopper 54 by the distance determined by the rotational position of the cam 52.

For fine adjustment of the spraying amount of the sprayed material 24, use the sleeve knob.
Rotate 48 around the shutter lever 46 axis to
Change the rotation position of 52. The cam 52 rotates while maintaining contact with the annular groove 58 of the stopper 54 by the biasing force of the spring portion 64, and increases or decreases the distance between the shutter lever 46 and the stopper 54, whereby the shutter lever 46 moves to the swing position. Is changed slightly.

FIG. 6 is a view showing a modified example of the stopper 54. Spring 72
Is a leaf spring and is fixed to the lower end of the shaft portion 62 by a screw 74. Since the spring portion 72 is separate from the main body of the stopper 54, the flexibility of setting the elastic force of the spring portion 72 and the shape of the spring portion 72 is high.

FIG. 7 is a modification of FIG. The spring portion 72 is attached to the shutter lever 46. In this example, the manufacture of the stopper 54 is simplified.

FIG. 8 is another structural view of the shutter lever 46 and the stopper 54. The magnet 76 is fixed to the lower surface of the lower end portion of the shaft portion 62, and the shutter lever 46 made of a magnetic material is biased toward the stopper 54 by the magnetic force of the magnet 76.

In the embodiment shown in FIG. 7, the cam 52 and the annular groove 58 are formed on the sleeve-shaped knob 48 and the stopper 54, respectively, but conversely, they are formed on the stopper 54 and the sleeve-shaped knob 48, respectively, and are scattered by the rotation of the stopper 54. It is also possible to make fine adjustments to the amount of material sprayed.

[Effect of device]

In this invention, the cam is rotatably attached to one of the shutter lever and the stopper, the contact with the other is held by the urging member, and the distance between the two is increased or decreased by changing the rotational position. Therefore, it is possible to adjust the rough opening of the shutter by changing the position of the stopper and finely adjust the opening of the shutter by rotating the cam. Further, even in the middle of the spraying work, the spraying amount can be easily and finely adjusted without stopping the spraying.

[Brief description of drawings]

The drawings relate to an embodiment of the present invention. FIG. 1 is a structural view of a shutter operating device shown as a partial cross section, FIG. 2 is a front view of the scale plate of FIG. 1, and FIG. FIG. 4 is a perspective view of a stopper, FIG. 5 is a view showing a state in which the stopper is displaced in the extension direction of the shutter lever guide groove, and FIG. 6 is a view showing a modified example of the stopper. FIG. 8 is a view showing a modified example of FIG. 6, FIG. 8 is another structural view of a shutter lever and a stopper, and FIG. 9 is a vertical sectional view showing an internal structure of a backpack power spreader. 10 …… backpack power spreader, 22 …… spreader tank, 24
...... Sprayer, 28 ...... Shutter, 42 ...... Guide groove (guide groove) for shutter lever, 46 ...... Shutter lever, 52
...... Cam, 54 ...... Stopper, 64 ...... Spring part (biasing member), 72 ...... Spring part (biasing member), 76 ...... Magnet (biasing member).

Claims (1)

[Scope of utility model registration request] 1. A shutter (28) for controlling the amount of the scattered matter (24) discharged from the scattered matter tank (22) by increasing or decreasing the opening, and a guide groove (42) connected to the shutter (28). Swing the shutter
A backpack power spreader having a shutter lever (46) for changing the opening of (28), wherein the shutter lever (46)
The stopper (5) fixed to the guide groove (42) so that the position of the shutter lever in the swinging direction is adjustable to limit the swinging of the shutter lever (46).
4), a biasing member (64, 72, 76) for biasing the shutter lever (46) toward the stopper (54), and the shutter lever
(46) and a cam (52) that is rotatably fitted to one of the stopper (54) and that increases or decreases the distance between the shutter lever (46) and the shutter lever (46) in the swinging direction by contact with the other. A shutter operating device for a backpack power spreader.