JPH0522286Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] 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 invention relates to a metering device for a power spreader that can be used.

[Conventional technology]

Figures 10 and 11 are side views partially in section of the entire power spreader equipped with a conventional metering device (e.g., Japanese Utility Model Publication No. 59-6915, Japanese Utility Model Publication No. 61-55954). 10 is a sectional view taken along the - line in FIG. 10. FIG. The blower 10 includes a fan case 12
A scroll passage 18 is formed between the inner circumference of the fan case 12 and the outer circumference of the impeller 16 and receives pressure from the impeller 16. The wind is derived. The jet head 20 has a plurality of jet ports 22 formed at appropriate intervals in the longitudinal direction on its lower surface side, and is connected to the discharge port of the scroll-shaped passage 18 via a conduit 24 serving as a pressurized air passage. Spraying agent 26
is from the top of the spraying agent tank 28 to the spraying agent tank 28.
It is put into the tank and stored. 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 rotational 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,
The output shaft 43 of the transmission 38 is connected to the rotary feeder 3
4 is integrally fixed.

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 of No. 4, 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 of the transmission 38. ing.

In addition, in FIG. 12, 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 rotational 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.
4 changes, the amount of spraying agent 26 supplied from the spreading agent tank 28 to the conduit 24 changes.

Furthermore, in FIG. 13, 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. Change the supply amount of 26. Also, engine 4
9 and the input shaft 42 of the transmission 38.
0 is provided so that the rotation of the rotary feeder 34 can be stopped even while the engine 49 is operating.

[The problem that the idea attempts 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 rotary feeder 34, 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 the rotational speed.
In order to ensure an appropriate adjustment range for the spray amount, a transmission 38 is required, which increases cost. 1st
When adjusting the spray amount by adjusting the opening degree of the throttle valve of the engine 14 shown in Figure 3, in order to obtain an appropriate pressurized air, the rotational speed of the engine 14 cannot be made too low; A transmission 38 with a wider shift width than the case shown in the figure is required. Furthermore, when the rotary feeder 34 is rotationally driven by the engines 14, 49, the engines 14, 49
The clutch 50 is necessary to prevent the spraying agent 26 from being sprayed by the rotation of the rotary feeder 34 during startup and warm-up.

Additionally, during spraying, it becomes necessary to adjust the spray amount depending on the situation. As a metering device for a power spreader, it would be convenient if the amount of spraying could be arbitrarily adjusted without interrupting the spraying operation.

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

[Means to solve the problem]

The power spreader has a spreading agent tank that stores the spreading agent, a blower that generates pressurized air, and a pressurized air passage that guides the pressurized air from the blower to the jet head together with the spreading agent from the spreading agent tank. It will be done. The metering device in such a power spreader includes a rotary feeder which has blades and recesses alternately in the circumferential direction and is driven to rotate and conveys the spraying agent from the spraying agent tank to the pressurized air passage; a plate-shaped member that is slidably supported on the side edge of the opening of the recess at the side edge of the recess and slides on the side wall surface of the recess at the other side edge; an external swinging part that swings integrally with the shaped member; an axially moving member that is movable in the axial direction of the rotary feeder; and an operating member that operates the axial position of the axially moving member; A push-pull wire that is locked to the external swinging part and the axially moving member to operate the swinging of the external swinging part, and this push-pull wire extends radially inward from the external swinging part and then connects to the rotary feeder. guiding means for guiding the push-pull wire so as to extend in the axial direction of the push-pull wire toward the axially moving member.

[Effect]

By operating the operating member, the axially moving member is displaced in the axial direction, thereby also displacing the push-pull wire. The push-pull wire has both ends coupled to the external swinging section and the axially moving member, respectively, via the guide means, so that the swinging position of the external swinging section can be changed by the push-pull wire, As a result, the plate-shaped member swings, and the depth of the side edge of the plate-shaped member on the free end side within the recess of the rotary feeder changes. Since the plate member defines an inflow space for the spray agent in the recess, a change in the swinging position of the plate member changes the amount of spray agent flowing from the spray 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 is 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 explained below with reference to the embodiments shown in FIGS. 1 to 9.

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. The rotary feeder 48 has end plates 50 at both ends in the axial direction.
52, blades 54 and recesses 56 are formed alternately in the circumferential direction of the rotary feeder 48 between the end plates 50, 52, and a through hole 57 with a keyway is further formed along the center line. ing. end plate 50,
A support hole 58 is formed near the periphery of the inner surface of the support hole 52 .

In FIG. 5, A indicates the rotation direction of the rotary feeder 48, and the front side wall 64 and rear side wall 66 of the recess 56 in the rotation direction A correspond to the rear side wall and front side wall of the blade 54, respectively, in the rotation direction A, The front wall 64 extends steeply toward the centerline of the rotary feeder 48, and the rear wall 66 conforms to an arc of radius R centered on the support hole 58.

6 and 7 are a plan view and a side view of the plate member 68. The plate 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 member 68 is arcuate around the circumference of the end plates 50, 52. Rotating shafts 70 project laterally from both ends of one side edge of the plate member 68, and an external swinging portion 74 having an eccentric cam shape is attached to the tip of one of the rotating shafts 70. It is fixed integrally and is configured to swing together with the plate member 68. Both rotating shafts 70 are rotary feeders 48
is inserted into the support holes 58 of the end plates 50 and 52 of the rotary feeder 48, and one rotation shaft 70 passes through the support hole 62 and projects to the outside of the end plate 52 of the rotary feeder 48.
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 this figure, the plate member 68 is rotatable in the direction B around the rotation axis of the upper edge of the front wall 64, and the rear wall 66 has a radius R around the rotation axis.
It is assumed that the arc of

FIG. 8 shows a plate member 68 attached to the rotary feeder 48.
FIG. The external swinging section 74 is arranged outside the rotary feeder 48 and is connected to the end plate 52.
It swings integrally with the plate-like member 68 via the rotation shaft 70 on the side. The radial position of the free end side of the external swinging section 74, that is, the recess 56 of the side edge of the free end side of the plate member 68 is related to the swinging position of the external swinging section 74.
) depth changes. Each of the external swing parts 7
4, one end of a push-pull wire 112, which will be described in detail later, is fixed to each of the push-pull wires 112, and as the push-pull wire 112 is pushed out or pulled, the external swinging section 74 is rotated in both directions.

FIG. 1 is a longitudinal sectional view of the metering device 30. A drive shaft 78 of the motor 76 passes through a keyway-equipped through hole 57 of the rotary feeder 48 and is integrally coupled to the rotary feeder 48 in the circumferential direction via a key 80 . Casing 3 on the opposite side of motor 76
At the end of 2, there is a partition plate 82 and a housing 84.
are joined, and the partition plate 82 and the housing 84 are fastened to the casing 32 by screws 86. The ball bearings 88 and 90 are connected to the drive shaft 7 in the casing 32 and the partition plate 82, respectively.
The drive shaft 78 is rotatably supported by the casing 32 and the partition plate 82. The support shaft 92 is disposed on the same axis as the drive shaft 78, and is supported by the partition wall 123 of the housing 84 by spline fitting so as to be freely displaceable in the axial direction. The axially moving member 96 includes a fitting portion 98 that is fitted to the end of the drive shaft 78 to be movable in the axial direction by spline fitting, and a flange portion that is integrally connected to the end of the fitting portion 98. 100. The annular fixing member 102 is fixed to the support shaft 92 by a screw 104 and has thrust bearings 106, 106.
The annular fixing member 102 prevents it from coming off the support shaft 92.
The flange portion 100 of the axially moving member 96 is rotatably connected to the support shaft 92 and integrally connected to the support shaft 92 in the axial direction. A central inner hole 108 extending in the axial direction is formed at the end of the drive shaft 78 on the axially moving member 96 side, and the through hole 110 is located at a position corresponding to each external swinging portion 74 in the axial direction of the drive shaft 78. are formed on the periphery of the drive shaft 78 respectively, and the central inner hole 108
It is connected to. Center inner hole 108 and through hole 110
serves as a guide means for the push-pull wire 112, and one end of the push-pull wire 112 is fixed to the circumferential surface of the external swinging section 74, and extends radially inward from the external swinging section 74 into the through hole 110. extending towards
It extends from the through hole 110 into the center inner hole 108 in the axial direction of the drive shaft 78, and the other end is fixed to the axially moving member 96.

The handle 114 rotates integrally with a worm gear 116 that is rotatably supported by the housing 84 , and the worm wheel 118 is rotatably supported by the housing 84 and rotates integrally with the worm gear 116 .
It meshes with 16. The link arm 122 is
Both ends are connected to the end of the support shaft 92 and the worm wheel 11
The support shaft 92 is rotatably connected to the peripheral portion of the worm wheel 118, and the support shaft 92 is reciprocated as the worm wheel 118 rotates. Rotation of the handle 114 causes the worm wheel 118 to rotate and the support shaft 92 to be displaced in the axial direction.

By operating the handle 114, the support shaft 92 is displaced in the axial direction, and the axially moving member 96 is accordingly displaced.
is also displaced in the axial direction, and the axial position of the end of the push-pull wire 112 on the axially moving member 96 side changes. The push-pull wire 112 extends upward in the radial direction from the through hole 110 and is fixed to the circumferential surface of the external swinging section 74, so that the push-pull wire 11
2, the swinging position of the plate member 68 changes via the external swinging section 74. Note that since the operating force of the handle 114 is transmitted to the axially moving member 96 by utilizing the engagement between the worm gear 116 and the worm wheel 118, the worm gear 116 is not rotated by the worm wheel 118, and the operator can Even after the handle 114 is released, the support shaft 92 remains fixed in its axial position.
The swinging position of the plate member 68 is fixed.

FIG. 2 is a cross-sectional view of the metering device 30. With respect to the radial direction of the rotary feeder 48, the edge of the plate member 68 on the swinging tip side is located at the external swinging portion 74.
The plate member 68 is adjusted in relation to the rocking position of the plate member 68.
is the depth of the inflow space of the dispersing agent 26 into the recess 56,
In other words, it defines the volume. As a result, the plate member 6
8, the spraying agent 2 is applied to the recess 56.
The inflow amount of 6 changes. As the drive shaft 78 rotates, the spray agent 26 flows from the lower part of the spray agent tank 28 into the inflow space of the rotary feeder 48, and as the rotary feeder 48 rotates, the spray agent 26 flows toward the conduit 24. transported and supplied to conduit 24. Spreading agent 26 is delivered to blower 10 in conduit 24.
The nozzle 22 of the nozzle head 20 is transported by pressurized air from
erupts from.

FIG. 9 is a structural diagram of another example of an operating member for an axially moving member. Operation lever 1 as an operation member
20 is swingably supported by the housing 84,
A fixed protrusion is inserted into the long groove at the lower end of the support shaft 92 . By operating the support shaft 92, the support shaft 92 is displaced in the axial direction. As a result, the amount of the spray agent 26 flowing into the rotary feeder 48, and therefore the amount of spraying, is adjusted. In the example shown in FIG. 9, the complicated worm gear 116 and worm wheel 118 as shown in FIG. 1 are not used, and costs can be reduced.

[Effect of idea]

As described above, according to this invention, a swingable plate member is provided in the recess formed between the blades of the rotary feeder, and the recess is moved in relation to the swing position of the plate member. The amount of spray agent flowing into the area 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 of spraying agent can be adjusted by adjusting the swinging position of the plate-like member through the section.

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.

By increasing the amount of axial engagement between the rotary feeder and the dispersant inflow space so that the recess in the rotary feeder is completely filled with the dispersant inflow space, the volume of the dispersant inflow space in the recess can be increased. becomes zero,
Despite rotation of the rotary feeder, the rotary feeder no longer transports the spraying agent from the spraying agent tank to the pressurized air passage. During startup and warm-up, it is necessary to stop spraying even while the engine is running, and conventional power spreaders use a clutch to cut off the transmission of rotational power from the engine to the rotary feeder. Although it was necessary, this idea
The clutch can be omitted.

In this device, the push-pull wire radially displaces the external swinging part integral with the side edge of the free end of the plate-shaped member by axially moving the axially moving member via the operating member. As a result, the depth of the side edge on the free end side of the plate member in the recess of the rotary feeder is continuously changed, so the amount of spraying can be arbitrarily adjusted without interrupting the spraying operation.

[Brief explanation of drawings]

Figures 1 to 9 relate to embodiments of this invention; Figure 1 is a longitudinal sectional view of the metering device, Figure 2 is a cross sectional view of the metering device, and Figure 3 is a plate-shaped plate to the rotary feeder. 4 is a perspective view of the rotary feeder, FIG. 5 is a cross-sectional view of the rotary feeder, and FIGS. 6 and 7 are plan and side views of the plate member. , FIG. 8 is an enlarged perspective view of the plate member assembled to the rotary feeder, FIG. 9 is a structural diagram of another example of the operating member for the axially moving member, and FIGS. 10 and 11 are the conventional A partially sectional side view of the entire power spreader equipped with a metering device, a sectional view taken along the - line in FIG. 10, and FIGS. 12 and 13 are block diagrams of the rotation speed adjustment mechanism of the rotary feeder. be. 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, 74 ... External swinging section, 96 ... Axial movement member, 108 ... Center inner hole (guiding means),
110...Through hole (guiding means), 112...Push-pull wire, 114...Handle (operating member),
120...Operation lever (operation member).

Claims (1)

[Scope of claim for utility model registration] (1) A spraying agent tank 28 that stores the spraying agent 26;
A power spreader comprising a blower 10 that generates pressurized air, and a pressurized air passage 24 that guides the pressurized air from the blower 10 to the jet head 20 together with the spreading agent 26 from the spreading agent tank 28. 5
4 and the recess 56 in the circumferential direction alternately and are rotated to remove the spraying agent 26 from the spraying agent tank 28.
a rotary feeder 48 for transporting the air to the pressurized air passage 24; A plate-like member 68 that slides on a wall surface, an external swinging section 74 that is disposed outside the rotary feeder 48 and swings integrally with the plate-like member 68, and the rotary feeder 4.
8 axially movable member 96
and an operating member 114 that operates the axial position of the axially moving member 96, and an operating member 114 that is locked at both ends to the external swinging section 74 and the axially moving member 96, respectively, and controls the swinging of the external swinging section 74. A push-pull wire 112 to be operated, and a push-pull wire 112 extending radially inward from the external swinging portion 74 and then in the axial direction of the rotary feeder 48 toward the axially moving member 96. The push-pull wire 11
2. A metering device for a power spreader, characterized in that it has guide means 108, 110 for guiding the spreader. (2) The guide means 108, 110 include a drive shaft 78 that rotates integrally with the rotary feeder 48.
A utility model registered as claimed in claim No. A metering device for the power spreader according to item 1. (3) The operating member 114 is
The axially moving member 9 is moved through a worm gear 116 operated by a worm gear 116 and a worm wheel 118 that engages with the worm gear 116 and displaces the axially moving member 96 by rotation.
6. A metering device for a power spreader according to claim 1 or 2 of the utility model registration claim, characterized in that the metering device operates a power spreader according to claim 1 or 2.