JPH0256262A - Amount regulator of backpack driving power type scattering device - Google Patents

Abstract

PURPOSE:To easily regulate the discharging amount of a spreading material by constituting the title amount regulator of a shutter provided to the outlet of a spreading material tank, a shutter lever, the specified grip, an inserting groove, a groove for stopping reference position and an energizing member. CONSTITUTION:When a shutter lever 44 is moved to an inserting groove 66 from a groove 72 for stopping reference position, the shutter lever 44 is moved to upper part by energizing force of an energizing member 70. The width of the groove 66 is narrowed as it proceeds to the upper part. A grip 46 is allowed to abut against the groove 66 in such height that the width of a tapered part 88 positioned in the groove 66 is allowed to coincide with the width of the groove 66 and thereby held in this position. At this time, a shutter is regulated to the aperture correspondent to the height of the grip 46 in the groove 66. When the grip 46 is rotated, the relative screwing position of the grip 46 and the shutter lever 44 is changed and thereby diameter of the tapered part 88 of the grip 46 is changed. Therefore the height wherein the tapered part 88 of the grip 46 in the groove 66 is allowed to abut against the groove 66 is changed and the aperture of the shutter can be regulated. This regulation is performed only when an operator rotates the grip 46 and releases it and the need for watching a scale at each time is eliminated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a metering device for a backpack power spreader used for spraying chemicals, fertilizers, etc. This invention relates to a metering device for a backpack power spreader that can adjust the discharge amount to .

[Conventional technology]

In the conventional metering device for backpack power spreaders, the tip of the shutter lever is inserted into a guide groove of a scale plate, and one of the locking grooves formed at appropriate intervals in the vertical direction on the side edge of this guide groove. The opening degree of the shutter at the outlet of the material to be sprayed is adjusted in relation to the swinging position of the shutter lever in the vertical direction, that is, the locking groove in which the shutter lever is locked. There is. Further, the scale plate is located on the side of the backpack power spreader with its front facing substantially forward, and scales corresponding to each of the locking grooves are written on the scale plate.

Therefore, the operator cannot see the scale on the scale plate while carrying the power sprayer on his back, and must engage the shutter lever in the desired locking groove to obtain the shutter opening degree according to the spraying situation. difficult to stop.

Therefore, in the metering device for the backpack power spreader disclosed in Japanese Utility Model Publication No. 62-4.0690, a stopper is provided to restrict the upward swinging of the shutter lever, and this stopper is inserted into the guide groove of the scale plate. It is fixed in advance at a predetermined locking groove position before spraying work, and during spraying, the upper limit swing position of the shutter lever is regulated by a stopper, and the lock is adjusted to correspond to the shutter opening depending on the spraying situation. It is made to match the height of the groove.

[Problem to be solved by the invention]

The problems with the metering device of the backpack power spreader disclosed in Utility Model Publication No. 62-40690 are as follows.

(a) The adjustable shutter lever opening degree becomes discontinuous and cannot be adjusted steplessly.

(b) The operator cannot see the scale position while carrying the power spreader on his or her back.

(c) As a result of the above (b), it is difficult for the operator to change the shutter lever to a desired swing position while carrying the power dispersion tank on his or her back.

The invention of claim 1 makes it possible to steplessly adjust the shutter lever opening degree in a metering device for a backpack-powered spreader in which the discharge amount of the spray material can be set without looking at the scale on the scale plate. The object of the invention of claim 2 is, in addition to the object of the invention of claim 1, to enable an operator to easily know the shutter lever opening position while carrying the power spreader on his or her back. To provide a metering device for a backpack power spreader that can change a shutter lever to a desired swinging position.

It is an object of the present invention to provide a metering device for a backpack power spreader that can accurately display the opening degree of the shutter lever.

[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 claim 1 includes a shutter (28) disposed at the outlet (29) of the spray material tank (24) and controlling the outflow amount of the spray material (26) at the outlet (29).
, the tip side swings vertically and the shutter (28
), a grip (46) that has a tapered portion (88) on the proximal end and is screwed onto the distal end of the shutter lever (44), and a grip (46) that extends vertically and extends downward. An insertion groove (66) whose width gradually increases and the tapered portion (88) is inserted through the insertion groove (66), and a reference position locking member that opens laterally into the insertion groove (66) at the lower end of the insertion groove (66). It has a groove (72) and a biasing member (70, 90) that biases the shutter lever (44) upward.

In the metering device for a backpack power spreader according to claim 2, the grip (46
) is the tip (82) of the internal shutter lever (44)
The transparent portion (80) is provided with a scale (87) that allows the user to see through the transparent portion (80).

In the metering device for the backpack power spreader according to claim 3, the spreading amount display ring (84) indicates the position of the shutter lever (44) in the extending direction at the position of the shutter lever (44) within the transparent portion (80). It is installed in an adjustable manner.

[Effect]

In the invention of claim 1, when the shutter lever (44) is moved laterally from the reference position locking groove (72) to the insertion groove (66), the shutter lever (44) is moved by the biasing member (70).
, 90) moves upward. Insertion groove (66
) is narrower toward the top, so the grip (46) can be inserted at a height where the width of the tapered portion (88) located in the insertion groove (66) matches the width of the insertion groove (66). groove(
66) and is held in this swinging position. The shutter (28) is opened to an opening degree corresponding to the swing angle of the shutter lever (44), that is, the height of the grip (46) in the insertion groove (66).

When the grip (46) is rotated with respect to the shutter lever (44), the relative screwing position between the grip (46) and the shutter lever (44) changes, and the shutter lever (44) in the extending direction of the shutter lever (44) changes. Grip for (44) (
46), that is, the diameter of the tapered portion (88) of the grip (46) changes at a location corresponding to the position of the insertion groove (66) with respect to the extending direction of the shutter lever (44),
This changes the height at which the tapered portion (88) of the grip (46) contacts the side edge of the insertion groove (66) in the insertion groove (66).

In the invention of claim 2, the transparent portion (80) of the grip (46)
The shutter lever (44) in the grip (46) is visible through the handle. Since the grip (46) protrudes forward, the operator can read the scale (87) on the transparent part (80) by turning his/her face downward while carrying the power spreader (10) on his/her back.
), and the shutter lever (4) for this scale (87).
4) The location of the predetermined location can be known. Scale (87
) with respect to the scale (87 ) The opening degree of the shutter lever can be determined from the position of a predetermined portion of the shutter lever (44) with respect to the shutter lever (44).

In the invention according to claim 3, the position of the spray amount display ring (84) with respect to the extending direction of the shutter lever (44) is adjusted,
The position of the spray amount display ring (84) relative to the transparent portion (80) of the grip (46) is such that the opening degree of the shutter lever is correctly indicated.

〔Example〕

FIG. 9 is an overall schematic diagram of the backpack power spreader 10.

The backpack power spreader 10 is equipped with a blower 12 at the bottom, and the blower 12 includes a fan case 14 made of resin, an impeller 16 disposed inside the fan case 14 and driven by an engine (not shown), and a radius It has a scroll-shaped ventilation passage 18 formed outside the impeller 16 in terms of direction. The bent pipe 20 is rotatably coupled to the fan case 14 so as to communicate with the downstream end of the ventilation passage 18, and has a discharge port 22. A jet (not shown) is connected to the downstream end of the bent pipe 20. The spray material tank 24 is placed and fixed on the upper part of the fan case 14, and contains a spray material 26 such as powdered and granular fertilizers and chemicals. The shutter 28 can be swung by manual operation of the spray tank 24.
The opening area of the outlet 29, that is, the discharge amount of the spray material 26 at the outlet 29 is adjusted. The pressurizing passage 30 is formed within the fan case 14 , branches from the middle of the ventilation passage 18 , and reaches an opening at the bottom of the spray tank 24 . The pressure pipe 32 is
Extending in the vertical direction, the pressurized air in the ventilation passage 18 is distributed to the spray material 2.
6 to the space inside the fan case 14 above. The discharge pipe 34 made of resin is arranged inside the fan case 14,
The upper end communicates with the outlet 29 at the bottom of the spray material tank 24, and the lower end opens near the bent pipe 20, and the spray material 26
is guided toward the bent pipe 20.

Pressurized air is generated in the air passage 18 by the rotation of the impeller 16, and this pressurized air is sent to the discharge port 22 through the air passage 18, and a part of the pressurized air flows through the pressurized pipe 32. 1 to the upper part of the backpack power spreader 10 to press the spray material 26 below the shutter 28, and the other part is passed through the pressurizing passage 30 to the opening at the bottom of the spray material tank 24. The spray material 26 is then entrained into the discharge pipe 34. As a result, the spray material 26 is force-fed from the discharge port 22 by pressurized air.

FIG. 10 is a perspective view of the operating mechanism of the shutter 28. The support shaft 36 is integrally fixed to the shutter 28, is rotatably supported at both ends by the shutter case 37 at the bottom of the spray tank 24, and is exposed to the outside of the shutter case 37 at one end. . The link arm 38 has three locking holes 40 in the longitudinal direction, has one end inserted through the exposed end of the support shaft 36, and is integrally fixed to the support shaft 36 with a lock nut 42. Shutter lever 4
4 includes a grip 46 that is disposed on the side of the backpack power spreader 1° and is grasped by the operator, and a support shaft 48 that is rotatably supported on the frame of the backpack power spreader 10. It is equipped with The lever arm 50 is fixed at one end to the end of the support shaft 48 and swings integrally with the support shaft 48 . The two locking holes 52 are formed side by side in the longitudinal direction of the lever arm 50. The intermediate rod 54 extends in the vertical direction between the backpack support of the backpack power spreader 10 and the main body of the backpack power spreader 0 mounted on the backpack support. is inserted into and fitted into the locking hole 40, and is prevented from coming off from the locking hole 40 by the lock pin 56,
Further, at the lower end, a predetermined locking hole 52 of the lever arm 50 is provided.
The lock nut 58 prevents the lock nut 58 from coming out of the locking hole 52.

The support shaft portion 48 rotates as the grip 46 swings, causing the lever arm 50 to swing. As a result, the intermediate rod 54 moves up and down, and the link arm 38 rotates integrally with the support shaft 36. In this way, the shutter 28 swings, the opening area of the outlet 29 of the spray material tank 24 changes, and the amount of spray material 26 is adjusted.

FIG. 1 is a perspective view of the operating section of the metering device. The support bracket 60 has its base end fixed to the front end of the side part of the backpack frame of the backpack power spreader 10, projects laterally by a predetermined amount, and then projects forward. The scale plate 62 faces forward,
The inner side edge in the left-right direction of the backpack power spreader 10 is fixed to the front end of the support bracket 60. The throttle lever groove 64 and the shutter lever groove 66 are formed on the scale plate 62 so as to be on the outside and inside in the left-right direction of the backpack power spreader 10, and extend long in the vertical direction. The shaft portion 48 of the shutter lever 44 extends to the side of the backpack power spreader 10 and is rotatably supported by a support bracket 60.
The backpack power spreader 10 is bent at a substantially right angle from the support shaft 48.
extends to the front. Support shaft portion 48 and support bracket 60
The connecting portion has a spring force, and this spring force urges the tip side of the swing shaft portion 68 outward in the left-right direction of the backpack power spreader 10. The grip 46 is attached to the distal end side of the swing shaft portion 68, and its proximal end side is inserted into the shutter lever groove 66. The torsion coil spring 70 is attached to the support shaft portion 48
The swing shaft 68 is fitted onto the end of the pivot shaft 68 , and both ends thereof are locked to the support bracket 60 and the swing shaft 68 , respectively, to urge the swing shaft 68 upward. FIG. 6 is a perspective view of the torsion coil spring 70.

FIG. 2 is a front view of the scale plate 62, and FIG. 3 is a front view of the scale plate 62.
It is a sectional view along a line. A plurality of locking grooves are formed at appropriate intervals in the vertical direction on one vertical side edge of the throttle lever groove 64, so that the throttle lever can be locked freely. On the scale plate 62, a scale (not shown) for the throttle lever is written along the side edge of the throttle lever groove 64.

The shutter lever groove 66 is formed so that the width becomes narrower toward the top, the recess 72 opens laterally at the lower end of the shutter lever groove 66, and a semicircular engagement portion 74 is formed in the recess 72.
is formed on the upper edge of the In the vertical direction, the lower end of the shutter lever groove 66, that is, the position of the recess 72 corresponds to the fully open position of the shutter 28.

FIG. 4 is a longitudinal sectional view of the area of the grip 46. The grip 46 includes a threaded portion 76 that is threaded into a threaded groove 78 of the swinging shaft portion 68 so as to be freely movable in the axial direction of the swinging shaft portion 68. The transparent cap 80 of the grip 46 is attached to the threaded portion 7
The tip end 82 of the swing shaft portion 68 is located within the transparent cap 80 .

A threaded groove is formed in the tip 82, a ring 84 is fitted onto the tip 82, and a pair of lock nuts 86, 86 are fitted.

The ring 84 is screwed onto the tip end 82 and held from both sides so that the position of the ring 84 in the axial direction of the swing shaft 68 can be freely adjusted. The tapered portion 88 is formed at the proximal end of the threaded portion 76, and has a diameter that gradually decreases toward the proximal side. The tapered portion 88 is located at a position corresponding to the shutter lever groove 66 and the engaging portion 74 (Fig. 2) in the axial direction of the swing shaft portion 68, and the tapered portion 88 is located at a position corresponding to the shutter lever groove 66 and the engaging portion 74 (Fig. 3). 88 is entirely located within recess 72.

FIG. 5 is a plan view of the transparent cap 80. The scale 87 is written on the surface of the transparent cap 80 and is marked from 0 to 10.

The operation of the embodiment will be explained.

The tip side of the swinging shaft 68 is biased outward in the left-right direction of the backpack power spreader 10 by the spring force of the joint between the support shaft 48 and the swinging shaft 68, and is biased upwardly by the torsion coil spring 70. is urged to. When the grip 46 is in the recess 72, the swing shaft portion 68 of the shutter lever 44 engages with the engaging portion 74, and at this time the shutter 28 is in a fully open state.

Grip the grip 46 and move the shutter lever 44 laterally into the recess 72 against the urging force in the direction of expanding the swing shaft 68 due to the joint between the support shaft 48 and the swing shaft 68. When the shutter lever 4 is moved from the shutter lever groove 66 to the shutter lever groove 66, the shutter lever 4
4 moves upward within the shutter lever groove 66 by the biasing force of the torsion coil spring 70.

Since the width of the shutter lever groove 66 is narrower toward the top, the handle 46 can hold the shutter lever at a height where the diameter of the tapered portion 88 located in the shutter lever groove 66 matches the width of the shutter lever groove 66. It comes into contact with the side edge of the groove 66. The shutter 28 is opened at an opening corresponding to the swing angle of the shutter lever 44, that is, the height of the grip 46 in the shutter lever groove 66.

FIG. 7 shows the relationship between the change in the relative position of the swing shaft 68 and the grip 46 in the axial direction of the swing shaft 68 and the swing position of the shutter lever 44. The grip 46 is the swing shaft portion 68
, the smaller the diameter of the tapered portion 88 becomes the position of the shutter lever groove 66, the shutter lever 44 is allowed to swing upward, and the shutter 2
8 setting opening degree can be increased. La, Lb, and LO indicate the highest position, intermediate position, and lowest position of the shutter lever 44, respectively, and correspond to fully open, half open, and fully open the shutter 28, respectively.

When the grip 46 is rotated relative to the shutter lever 44,
The relative screwing position between the grip 46 and the shutter lever 44 changes, and the position of the grip 46 with respect to the shutter lever 44 in the extending direction of the shutter lever 44, that is, the shutter lever groove 6 in the extending direction of the shutter lever 44 changes.
The diameter of the tapered portion 88 of the grip 46 at the location corresponding to the position 6 changes, thereby causing the shutter lever groove 6 to change.
6, the height at which the tapered portion 88 of the grip 46 contacts the side edge of the shutter lever groove 66 changes. The change in the relative screwing position between the grip 46 and the shutter lever 44 in the extending direction of the shutter lever 44 is determined by the transparent cap 8
Ring 84 and scale 87 of transparent cap 8o in 0
This appears as a change in the relative position of the The grip 4 is inserted from the outside of the transparent cap 80 through the transparent cap 80 of the grip 46.
The ring 84 inside 6 is visible, and the transparent cap 80
protrudes forward, so the operator can carry the power spreader on his back by turning his head downward.
It is possible to know the scale 87 of the transparent cap 80 and the position of a predetermined portion of the ring 84 with respect to this scale 87, and thereby the opening degree of the shutter 28 at the outlet 29 of the spray tank 24 can be known. ,Furthermore, the worker,
While observing the relationship between the scale 87 of the transparent cap 80 and the ring 84, the handle 46 is rotated relative to the shutter lever 44 to change the diameter of the tapered portion 88 at the position of the shutter lever groove 66. Power spreader 10
The shutter 28 can be adjusted to a desired opening degree while carrying the patient on his or her back.

Due to errors in the manufacture and assembly of the backpack power spreader 10,
For the same opening degree of the shutter 28, the shutter lever 4
The relative position of the grip 46 with respect to the swing shaft portion 68 of No. 4 changes. To deal with this, the transparent cap 80 is attached to the threaded portion 7.
6, loosen the lock nut 86, adjust the position of the ring 84 with respect to the extending direction of the shutter lever 44,
When the ring 84 is at a predetermined scale 87, a predetermined shutter opening degree is obtained. In this way, the position of the ring 84 with respect to the scale 87 is made to correctly display the shutter opening degree.

FIG. 8 shows another biasing means for the swing shaft portion 68 of the shutter lever 44. As shown in FIG. The tension coil spring 90 is used in place of the torsion coil spring 70 in FIG. ing.

〔Effect of the invention〕

In the first aspect of the invention, the grip is rotated with respect to the shutter lever to change the relative position of the grip with respect to the shutter lever, thereby adjusting the diameter of the tapered portion of the grip that contacts the side edge of the insertion groove. Therefore, in relation to the diameter of the tapered portion corresponding to the position of the insertion groove, the height at which the tapered portion contacts the side edge of the insertion groove changes, and the shutter opening degree can be adjusted. This adjustment is done automatically when the operator simply releases his/her hand from the grip, so the tapered part
- The shutter opening degree can be easily and quickly set to a desired value without looking at the scale.

In the invention of claim 2, the position of a predetermined position of the shutter lever with respect to the scale of the transparent part, that is, the relative position of the shutter lever and the grip, in other words,
The diameter of the tapered part of the grip, which is positioned in the insertion groove, can be seen, and the operator can easily check the scale on the transparent part and the transparent part relative to this scale by simply looking down while carrying the power spreader Predetermined locations of the shutter lever within the section can be seen. Therefore, the operator can know the shutter opening degree while carrying the power spreader on his/her back. In addition, the operator can adjust the relative position of the grip in the extending direction of the shack lever by rotating the grip with respect to the shack lever while carrying the backpack power spreader on his or her back. , it is possible to adjust the shutter opening to a desired value.

In the third aspect of the invention, the axial position of the spray amount display ring can be adjusted in the same manner as the grip with respect to the extending direction of the shutter lever. Therefore, even if a relative error occurs between the scale on the transparent part and the predetermined location on the shack lever due to manufacturing errors, the position of the spray amount display ring can be adjusted.
The exact shutter opening degree can be displayed from the position of the spray amount display ring with respect to the scale.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention, and FIG. 1 is a perspective view of the operating section of the metering device, FIG. 2 is a front view of the scale plate, and FIG.
4 is a longitudinal sectional view of the grip area, 5 is a plan view of the transparent cap, 6 is a perspective view of the torsion coil spring, and 7 is a sectional view taken along line ■-■ in the figure. A diagram showing the relationship between the change in the relative position of the swing shaft and the grip in the axial direction of the shaft and the swing position of the shutter lever, and FIG. 8 shows another biasing means for the swing shaft 68 of the shutter lever. FIG. 9 is an overall schematic diagram of the backpack power spreader, and FIG. 10 is a perspective view of the shutter operating mechanism. 10... Backpack power spreader, 24... Spray material tank,
26...Scattered material, 28...Shutter, 29...Exit, 44...Shutter lever, 46...Grip, 66
... Shutter lever groove (insertion groove), 70 ... Torsion coil spring (biasing member), 72 ... Recess (reference position locking groove), 8o ... Transparent cap (transparent part) , 8
2...Tip part, 84...Ring (spread amount display ring), 87...Scale, 88...Tapered part, 90...
・Tension coil spring (biasing member). Fig. 1 44: Shutter lever 88: Taber part Fig. ``■ Fig. Procedure correction band (voluntary) (6, Contents of correction) In the specification dated September 1988

Claims (3)

[Claims] (1) A shutter (28) that is disposed at the outlet (29) of the spray material tank (24) and controls the outflow amount of the spray material (26) at the outlet (29); a shutter lever (44) that controls the opening degree of the shutter (28); a grip (46) having a tapered portion (88) on the base end side and screwed onto the distal end side of the shutter lever (44); an insertion groove (66) that extends in the direction and gradually increases in width toward the bottom and is inserted through the tapered portion (88); A backpack power spreader characterized by having a reference position locking groove (72) that opens from the top and a biasing member (70, 90) that biases the shutter lever (44) upward. Metering device. (2) The grip (46) has a transparent portion (80) through which the tip (82) of the shutter lever (44) can be seen through.
), and a scale (87) is provided on the transparent portion (80). (3) The spray amount display ring (84) is connected to the transparent portion (84).
2. The backpack power spreader according to claim 1, wherein the shutter lever (44) is attached to the position of the shutter lever (44) in the position of the shutter lever (44) in the position of the shutter lever (44) in the position of the shutter lever (44) in an adjustable position in the extending direction of the shutter lever (44). Device.