JPH0454846Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a metering device for a power spreader, and more specifically, to adjust the amount of spraying agent to be sprayed without changing the rotational speed of a rotary feeder. This relates to a metering device for a power spreader that allows for

[Conventional technology]

11 and 12 are a partially sectional side view of the entire power spreader equipped with a conventional metering device, and a sectional view taken along the line - in FIG. 11. The blower 10 has an engine 14 inside the fan case 12.
The scroll-shaped passage 18 includes an impeller 16 driven by a drive shaft 15 of the fan case 12.
is formed between the inner periphery of the impeller 16 and the outer periphery of the impeller 16 to extract pressurized air from the impeller 16. The jet head 20 is
A plurality of nozzles 22 are bored at appropriate intervals in the longitudinal direction on the lower surface thereof, and are connected to the discharge port of the scroll-shaped passage 18 via a conduit 24 serving as a pressurized air passage. The spraying agent 26 is introduced into the spraying agent tank 28 from the upper part of the spraying agent tank 28 and is stored therein. The metering device 30 is arranged in the lower part of the spraying agent tank 28, and the casing 32 of the metering device 30 is connected to the lower part of the spreading agent tank 28 and to the conduit 24 at upper and lower connections, respectively. The rotary feeder 34 has a plurality of blades 36 spaced at equal angular intervals in the circumferential direction, and is rotatably disposed within the casing 32. The transmission 38 has an input shaft 42 to which rotational power is transmitted from the drive shaft 15 via pulleys 40 and 41, and an output shaft 43 of the transmission 38 is integrally fixed to the rotary feeder 34.

As the engine 14 operates, the impeller 16 rotates, and pressurized air flows from the scroll passage 18 to the conduit 2.
Leads to 4. On the other hand, the rotary feeder 34 also rotates, and the spray agent tank 2 is placed in the recess between the blades 36.
The spraying agent 26 is received from the lower part of the tube 8 and dropped into the conduit 24. The spraying agent 26 dropped into the conduit 24 from the metering device 30 is conveyed to the jet head 20 by pressurized air from the blower 10, and is discharged from the jet port 22 of the jet head 20.

In the conventional metering device 30, the rotary feeder 3
It is difficult to adjust the volume of the recess between the blades 36 in the rotary feeder 34, and when changing the amount of spraying agent 26, the rotational speed of the rotary feeder 34 must be changed by changing the reduction ratio in the transmission 38. ing.

Further, in FIG. 13, the power frequency or voltage of the AC power source 44 is converted by a frequency converter or transformer 45, and is supplied to the motor 46.
directly drives the input shaft 42 of the transmission 38. By changing the frequency or voltage of the input power to the motor 46 by the frequency converter or transformer 45, the rotation speed of the motor 46, that is, the input shaft 42 changes, and as a result, the rotation speed of the motor 46, that is, the input shaft 42 changes, and as a result, the rotation speed of the motor 46, that is, the input shaft 42 changes.
As the rotational speed of the spraying agent 26 changes, the amount of spraying agent 26 supplied from the spreading agent tank 28 to the conduit 24 changes.

Furthermore, in FIG. 14, the input shaft 4 of the transmission 38
The rotational speed of the engine 49 that drives the spraying agent 2 is changed by adjusting the opening degree of the throttle valve 47, whereby the rotational speed of the rotary feeder 34 is changed and the spraying agent is transferred from the spraying agent tank 28 to the conduit 24. The supply amount of 26 changes.

[The problem that the idea aims to solve]

When adjusting the rotational speed of the rotary feeder 34 using the transmission 38, frequency converter or transformer 45, etc. to change the amount of spraying agent 26,
Since the transmission 38, frequency converter or transformer 45, etc. are expensive, the cost increases and the device becomes large-scale.

Adjustment of the spray amount by the opening degree of the throttle valve 47 of the engine 49 has a narrow adjustment range of rotational speed, and in order to ensure an appropriate adjustment range of the spray amount, a transmission 38 is required, which increases costs. . 12th
When adjusting the spray amount by adjusting the opening degree of the throttle valve of the engine 14 shown in the figure, the rotational speed of the engine 14 cannot be made too low in order to obtain an appropriate pressurized air. In this case, a transmission 38 with a wider shift range than usual is required.

The purpose of this invention is to adjust the amount of spraying agent without changing the rotation speed of the rotary feeder.
It is an object of the present invention to provide a metering device for a power spreader that can omit a rotational speed changing device of a rotary feeder such as a transmission 38.

[Means to solve the problem]

The power spreader includes a spreading agent tank that stores a spreading agent, a blower that generates pressurized air, and a pressurized air passage that guides the pressurized air from the blower to a jet head together with the spreading agent from the spreading agent tank. It has. The metering device in such a power spreader is
A rotary feeder having blades and recesses alternately in the circumferential direction and being rotationally driven to convey the spreading agent from the spreading agent tank to the pressurized air passage, and a rotary feeder that is displaced within the recess and the amount of the spreading agent flowing into the recess. It has a displacement member that changes the position of the displacement member, and an adjustment means that adjusts the position of the displacement member.

[Effect]

The adjustment means changes the displacement position of the displacement member within the recess of the rotary feeder. Since the displacement member defines an inflow space for the spraying agent in the recess, a change in the position of the displacement member changes the amount of spraying agent flowing from the spraying agent tank into the recess of the rotary feeder. The spray agent that has flowed into the recess is carried along with the rotation of the rotary feeder and supplied into the pressurized air passage. The spraying agent is transported to the jet head through the pressurized air passage by pressurized air from the blower, and is ejected from the jet head.

〔Example〕

This invention will be described below with reference to the embodiments shown in FIGS. 1 to 10.

Fig. 4 is a perspective view of the rotary feeder 48; Fig. 5 is a perspective view of the rotary feeder 48;
The figure is a cross-sectional view of the rotary feeder 48, and FIG. 6 is a view of the rotary feeder 48 viewed from the axial direction. The rotary feeder 48 has end plates 50 and 52 at both ends in the axial direction, and blades 5 are arranged between the end plates 50 and 52 alternately in the circumferential direction of the rotary feeder 48.
4 and a recess 56 are formed, and a through hole 57 with a key groove is further formed along the center line. A support hole 58 is formed near the periphery of the inner surface of the end plates 50 and 52, and a knurl 6 is formed at the center of the outer surface of the end plate 52.
0 is set. The notch 62 is formed in the end plate 52 and extends in an arc shape centered on the support hole 58 from the periphery of the end plate 52 to the vicinity of the knurling 60.

In FIG. 5, A indicates the rotational direction of the rotary feed 48, and the front side wall 64 and the rear side wall 66 of the recess 56 in the rotational direction A correspond to the rear side wall and the front side wall of the blade 54, respectively, in the rotational direction A, The front wall 64 extends steeply toward the center line of the rotary feeder 48, the rear wall 66 corresponds to an arc of radius R (shown in the third figure) centered on the support hole 58, and the notch 62 is It extends along the rear side wall 66.

7 and 8 are a plan view and a side view of the plate member 68. The plate-like member 68 has a size that covers the opening of the recess 56 of the rotary feeder 48, and the cross section of the plate-like member 68 has a layered arc shape around the circumference of the end plates 50, 52. A rotating shaft 70 projects from both ends of one side edge of the plate member 68 toward the side edge, and a fixed shaft 72 projects from one end of the other side edge toward the side edge. Both rotating shafts 70 are connected to the support holes 5 of the end plates 50 and 52 of the rotary feeder 48.
8 , and the fixed shaft 72 can be inserted into the notch 62 . By inserting the rotation shaft 70 into the support hole 58, the plate member 68 is swingably supported at the side edge on the rotation shaft 70 side.

FIG. 3 shows the plate member 6 attached to the rotary feeder 48.
FIG. 8 is a sectional view showing the assembled state of No. 8; As shown in FIG. 3, the plate member 68 is rotatable around the rotation axis of the upper edge of the front wall 64, and
6 is a circular arc having a radius R and centered on the rotation axis. B indicates the direction in which the plate member 68 swings.

FIG. 9 shows how the adjustment fixing plate 74 is attached to the rotary feeder 4.
8 is a view seen from the contact side with the end plate 52 of No. 8. The fitting hole 76 is formed at the center of the adjustment and fixing plate 74, and has a knurling process applied to its circumferential surface. Fitting hole 76
is removably fitted into the knurl 60 of the rotary feeder 48, and engages with the knurl 60 in the circumferential direction by fitting into the knurl 60. Arc groove 7
In the illustrated example, 8 is inclined in the opposite direction to the notch 62 in FIG. It is being Note that the arcuate groove 78 may have any shape as long as it is different from the shape of the notch 62 and extends in the radial direction of the adjustment and fixing plate 74.

FIG. 10 shows the rotary feeder 48 and the plate member 6.
8 and an adjustment and fixing plate 74 are assembled.
The fitting hole 76 of the adjusting and fixing plate 74 is fitted into the knurling 60 of the rotary feeder 48, so that the adjusting and fixing plate 74 rotates integrally with the rotary feeder 48. At each relative rotational position of the adjusting and fixing plate 74 with respect to the end plate 52 of the rotary feeder 48, the end plate 52
2 notch 62 and arcuate groove 78 of adjustment fixing plate 74
intersects at one point and relates to the radial direction of the rotary feeder 48. The position of this intersection changes in relation to the relative rotational position of the adjustment and fixing plate 74 with respect to the end plate 52 of the rotary feeder 48. Plate member 68
After penetrating the notch 62, the fixed shaft 72 (shown in the seventh figure) is inserted into the arcuate groove 78 of the adjustment fixing plate 74, and the penetrating position in the notch 62 and the arcuate groove 7 are
The insertion position at 8 is the intersection. In this way, by changing the relative rotational position of the adjusting and fixing plate 74 with respect to the end plate 52, the depth of the edge of the plate-like member 68 on the fixed shaft 72 side in the recess 56 is adjusted.

FIG. 2 is a longitudinal sectional view of the metering device 30. The drive shaft 82 of the engine 80 passes through the key grooved through hole 57 of the rotary feeder 48, and the key 84 is inserted into the fitting part between the key grooved through hole 57 and the drive shaft 82, and moves both in the circumferential direction. are integrally connected.
The nut 86 is screwed onto the tip of the drive shaft 82, presses the washer 88 against the knurl 60, and connects the adjustment fixing plate 74 from the rotary feeder 48 and the drive shaft 8.
This prevents 2 from slipping out. The C-shaped retaining ring 90 is fitted onto the inner periphery of the casing 32 on the nut 86 side,
This prevents the rotary feeder 48, adjustment fixing plate 74, etc. from coming off from the casing 32. The O-rings 92 and 94 are disposed at the shaft support of the drive shaft 82 and the rotational support of the adjustment and fixing plate 74 in the casing 32, respectively, and prevent the spraying agent 26 at that location.
This prevents leakage.

FIG. 1 is a cross-sectional view of the metering device 30. With respect to the radial direction of the rotary feeder 48, the position of the edge of the plate-like member 68 on the swinging tip side is adjusted in relation to the relative rotational position of the adjustment and fixing plate 74 with respect to the end plate 52 of the rotary feeder 48, The member 68 is
The depth, ie, the volume, of the inflow space of the spray agent 26 into the recess 56 is defined. As a result, the amount of spraying agent 26 flowing into the recess 56 changes in relation to the swinging position of the plate member 68. As the rotary feeder 48 rotates, the spreading agent 26 flows from the lower part of the spreading agent tank 28 into the inflow space of the rotary feeder 48,
This spraying agent 26 is conveyed toward the conduit 24 as the rotary feeder 48 rotates, and is supplied to the conduit 24. The spraying agent 26 is carried by pressurized air from the blower 10 in the conduit 24 and is ejected from the nozzle 22 of the nozzle head 20 .

[Effect of idea]

As described above, according to this invention, a displaceable member is provided in the recess formed between the blades of the rotary feeder, and the dispersion agent is distributed to the recess in relation to the displacement position of the displaceable member. The amount of inflow changes. The flow rate of the spraying agent that the rotary feeder supplies from the spraying agent tank to the pressurized air passage is related to the amount of spraying agent flowing into the recess. The amount can be adjusted.

With this invention, the amount of spraying agent can be adjusted without changing the rotational speed of the rotary feeder, which reduces costs by omitting equipment such as transmissions, frequency converters, or transformers. Is possible.

In addition, even when spraying a small amount, the rotary feeder maintains a suitably high rotational speed, so the spraying agent is continuously supplied from the rotary feeder to the pressurized air passage, suppressing uneven spraying. can do.

[Brief explanation of the drawing]

Figures 1 to 10 relate to embodiments of this invention.
Fig. 1 is a cross-sectional view of the metering device, Fig. 2 is a longitudinal sectional view of the metering device, Fig. 3 is a sectional view showing how the plate member is assembled to the rotary feeder, and Fig. 4 is a cross-sectional view of the metering device. A perspective view of the feeder, FIG. 5 is a cross-sectional view of the rotary feeder, FIG. 6 is a view of the rotary feeder viewed from the axial direction, and FIGS. 7 and 8 are a plan view and a side view of the plate member. , FIG. 9 is a view of the adjustment and fixing plate seen from the contact side with the end plate of the rotary feeder, FIG. 10 is a perspective view of the rotary feeder with the plate member and adjustment and fixation plate assembled, and FIGS. FIG. 14 relates to the prior art, and FIGS. 11 and 12 are a partially sectional side view of the entire power spreader equipped with a conventional metering device, a sectional view taken along the - line in FIG. 11, and FIG.
3 and 14 are block diagrams of the rotational speed adjusting mechanism of the rotary feeder. 10... Blower, 20... Jet head, 24... Conduit (pressurized air passage), 26... Spraying agent, 28... Spraying agent tank, 30... Metering device, 48... Rotary feeder, 54... ...Blade, 56...Recess, 68
... Plate member (displacement member), 74 ... Adjustment and fixing plate (adjustment means).

Claims (1)

[Scope of claim for utility model registration] (1) A spraying agent tank 28 that stores the spraying agent 26;
A blower 10 that generates pressurized air, and this blower 1
In the power spreader, the blade 54 and the recess 56 are arranged in the circumferential direction. a rotary feeder 48 that is rotated alternately to carry the spraying agent 26 from the spraying agent tank 28 to the pressurized air passage 24; A displacement member 68 that changes the inflow amount of 26, and this displacement member 6
8. A metering device for a power spreader, characterized in that it has an adjusting means 74 for adjusting the position of the power spreader. (2) The displacement member 68 includes a plate-shaped member 68 pivotably supported at one side edge of the opening of the recess 56, and a swinging tip side of the plate-shaped member 68 said recess 56 along the locus of the side edge of
A metering device for a power spreader according to claim 1, characterized in that the side wall surface of the power spreader is formed as follows. (3) The plate-like member 68 includes a fixed shaft 72 that protrudes from the side edge on the swinging tip side in the axial direction of the rotary feeder 48, and the adjusting means 74 adjusts the swing of the plate-like member 68. an insertion groove 78 extending in the radial direction and having a linear shape that does not match the trajectory of the fixed shaft 72, into which the end of the fixed shaft 72 is inserted;
Further, the power spreader is fixed to the rotary feeder 48 so that its center line coincides with the rotary feeder 48 and its relative rotational position can be freely adjusted. metering device.