JPH075190B2 - Powder suction nozzle device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a powder suction nozzle device for sucking powder contained in a container.

[Conventional technology]

As a means for transferring the powder contained in the container to the outside of the container, there is a method of inserting the nozzle into the container and sucking the powder by a negative pressure generation source to take the powder out of the container.
However, this method has a drawback that suction of the powder becomes difficult when the powder absorbs moisture and solidifies. Therefore, recently, a stirring device has been installed at the tip of the nozzle,
A method of sucking while breaking the powder with this stirring device is adopted.

[Problems to be solved by the invention]

By the way, in the powder suction nozzle device provided with the above stirring device, there is a problem that the nozzle may not be inserted in a container in which the inner diameter of the container opening is smaller than the inner diameter of the container body. Further, even if the nozzle can be inserted, the powder on the outer peripheral portion in the container cannot be sufficiently agitated, so that there is a problem that the powder remains on the outer peripheral portion in the container.

Further, there is a problem that the powder located on the outer peripheral side of the bottom portion in the container cannot be sucked only by stirring with the stirring device, and the powder remains in this portion.

Further, there is a problem that powder is scattered out of the container during suction, which deteriorates the working environment.

[Means for solving problems]

The present invention has been made to solve the above-mentioned problems. In the first invention, a hollow pipe having a suction opening at the tip and a rear end of the hollow pipe are connected. In the powder suction nozzle device including a negative pressure source, a through hole is formed in a side wall portion near the tip of the hollow pipe, the through hole is attached so as to be able to communicate with the through hole, and a longitudinal direction is provided on the tip side. Is provided with an elongated duct having an opening formed therein, the duct has a base end portion swingably attached to the hollow pipe, and an opening / closing mechanism is provided in the through hole.

Further, according to the second aspect of the invention, in a powder suction nozzle device comprising a hollow pipe having a suction opening at its tip and a negative pressure source connected to the rear end of this hollow pipe. A through hole is formed in a side wall portion near the tip of the hollow pipe, is attached so as to be able to communicate with the through hole, and an elongated duct having an opening formed in the longitudinal direction is provided on the tip side. Has a base end portion swingably attached to the hollow pipe, an opening / closing mechanism is provided in the through hole, and the outer periphery of the hollow pipe is covered with a tubular body. A lid member that is formed so as to project further outward in the radial direction from the outer peripheral portion of the tubular body and is movable in the axial direction of the hollow pipe is loosely fitted in the portion.

[Action]

According to the first aspect of the present invention, an elongated duct is provided at the tip of the hollow pipe, and the duct has its base end attached to the hollow pipe so as to be swingable.

Therefore, even in a container in which the inside diameter of the opening is smaller than the inside diameter of the container body, the nozzle can be inserted into the inside of the container by passing the narrow opening by folding the duct upward.

In addition, since a long and narrow duct is provided at the tip of the hollow pipe, by rotating the duct, the powder in the outer peripheral portion of the container can be broken down and sucked, so that the powder remains on the outer peripheral portion. Can be prevented.

Further, an elongated duct having an opening formed in the longitudinal direction is provided on the tip end of the hollow pipe so as to be able to communicate with the through hole, and an opening / closing mechanism is provided on the through hole. Therefore, powder can be sucked into the hollow pipe from the opening on the tip end side of the duct through the duct and through the through hole, and as a result, the powder at the bottom of the container can be sucked completely. it can.

Further, in the second invention, in addition to the configuration of the first invention, the outer circumference of the hollow pipe is covered with a tubular body,
A lid member that is formed so as to project further outward in the radial direction than the outer circumferential portion of the tubular body and is movable in the axial direction of the hollow pipe is loosely fitted to the outer circumferential portion of the tubular body.

Therefore, in addition to the effect of the first invention, the opening of the container can be covered with the lid member, and the scattering of powder can be prevented.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 20.

1 to 9 are views showing a powder suction nozzle device according to the present invention. In these drawings, reference numeral 11 indicates a hollow pipe. The hollow pipe 11 is formed in a cylindrical shape, and its upper end is connected to a negative pressure source (not shown). Then, the powder is sucked up and transferred by the negative pressure source. A suction opening 11a is provided at the lower end of the hollow pipe 11, and two ducts 12, 12 are provided on the outer circumference of the lower end of the hollow pipe 11. The ducts 12, 12 are arranged on both sides of the hollow pipe 11 so as to sandwich the hollow pipe 11, and are formed so as to project radially outward from the hollow pipe 11. The duct 12 is, as shown in FIGS. 4 to 6, the first duct 13 on the hollow pipe 11 side.
And an outer second duct 14. The first duct 13 is a shaft provided at the lower end of the hollow pipe 11.
It is pivotally supported by 15, and can be swung between a direction projecting outward in the radial direction and a direction parallel to the hollow pipe 11.

As shown in FIG. 6, the first duct 13 is formed in a substantially U-shape whose lower portion is opened in a cross section orthogonal to the projecting direction, and the upper plate portion 16 and the upper plate portion 16 are formed. An opening 13a is formed which is composed of side plate portions 17 and 17 protruding downward from both side edges and is open downward. A second duct 14 that projects radially outward is provided at the outer end of the first duct 13. The second duct 14 is formed in a substantially U-shape with the lower side opened in a cross section orthogonal to the projecting direction, and projects downward from the upper plate portion 18 and both side edges of the upper plate portion 18. An opening 14a is formed which is composed of the side plate portions 19 and 19 and an outer plate portion 20 which projects downward from the outer edge of the upper plate portion 18 and which is opened downward. The second duct 14 is detachably connected by fitting its base end portion to the inner wall surface of the outer end portion of the first duct 13. As shown in FIG. 6, the distance between the side plate portions 17, 17 of the first duct 13 is such that the lower end side is narrower than the upper end side, and the side plate portions 19, 17 of the second duct 14 are formed. The intervals of 19 are made in the same way. Therefore, the second duct 14 does not drop downward from the first duct 13 at the connecting portion of both ducts. Also, the second duct 14
The lower end edges of the side plate portions 19, 19 of the
When the lower end edges of the duct 13 and the second duct 14 are brought into contact with each other on a plane, an inclined edge portion 21 is formed so as to be separated from the plane as it goes radially outward. ing. When the first duct 13 and the second duct 14 are brought into contact with the bottom surface of the container, the slanted edge portion 21 sucks air from the gap below the slanted edge portion 21 to remove the powder on the outer peripheral portion of the bottom surface of the container. It is designed to be able to suck efficiently. Also,
The outer plate portion 20 of the second duct 14 is provided with a brush 22 protruding outward in the radial direction so that the powder adhered to the inner wall surface of the container can be removed.

On the other hand, at the lower end of the hollow pipe 11 where the outer wall surface thereof faces the first duct 13, as shown in FIGS. A through hole 23 that communicates with and is provided. In this through hole 23,
A partition plate 24 is provided. The partition plate 24 is rotatably supported by a shaft 25 provided at the upper end of the through hole 23. One end of a link 26 is connected to the partition plate 24, and the other end of the link 26 is connected to the upper plate portion of the first duct 13.
It is connected to 16. Then, when the first duct 13 swings about the shaft 15 and becomes parallel to the hollow pipe 11, the partition plate 24 is pulled up by the link 26 to be in the open state. Further, when the first duct 13 is in a state of obliquely projecting upward as it goes radially outward, the partition plate 24 is in a direction along the side wall of the hollow pipe 11 and is in a closed state. Further, when the first duct 13 is projected outward in the radial direction, the partition plate 24 is pushed inward from the side wall of the hollow pipe 11 and opened.

On the other hand, as shown in FIGS. 1 to 3, two air cylinders 27 are attached to the side of the hollow pipe 11 via a frame 28. This air cylinder 27 is arranged parallel to the hollow pipe 11 and with the piston rod 29 facing downward. A bellows 30 that covers the piston rod 29 is mounted between the tip end portion of the piston rod 29 and the lower end portion of the air cylinder 27 so that powder is not attached to the piston rod 29. A fitting 31 is provided at the tip of the piston rod 29, and the fitting 31 has a pin.
32 are provided. On the other hand, a shaft 33 is provided on the upper surface of the upper plate portion 16 of the first duct 13, and the shaft 33 has
One end of the arm 34 is connected. And arm 34
Are rotatable about the shaft 33.
The other end of the arm 34 is provided with an elongated hole 35 formed in the longitudinal direction of the arm 34, and the elongated hole 35 is engaged with a pin 32 provided on the metal fitting 31. Further, between the hollow pipe 11 and the first duct 13, a twist for rotating and pressing the first duct 13 from a state parallel to the hollow pipe 11 to a state protruding outward in the radial direction. A spring 36 is provided. Therefore, when no external force is applied to the duct 12, the arm 34 is pulled downward and the pin 32 of the metal fitting 31 is located on the upper end side of the elongated hole 35.

In such a structure, when the piston rod 29 is moved upward, the duct 12 is pulled up via the arm 34. Further, when the piston rod 29 is moved downward, the duct 12 is pulled down via the arm 34, and the duct 12 is projected outward in the radial direction.

On the other hand, the frame 28 is provided with a cylindrical cover 37 that covers the upper portion of the hollow pipe 11. The frame 28, the hollow pipe 11, the air cylinder 27, and the cover 37 are joined in an airtight state. A ring-shaped lid member 38 is provided on the outer periphery of the cover 37 so as to be vertically movable. A slight gap S is provided between the inner peripheral surface of the lid member 38 and the outer peripheral surface of the cover 37, and air can pass through the gap S. Further, a stopper 39 protruding outward in the radial direction is provided at the lower end of the cover 37 so that the lid member 38 does not drop downward.

Next, using the powder suction nozzle device as described above, the first
A method for sucking powder from the container C in which the inner diameter of the container opening A as shown in the figure is smaller than the inner diameter of the container body B will be described.

First, the air cylinder 27 is operated to move the piston rod 29 upward. Then, the duct 12 is passed through the arm 34.
Are pulled upward and drawn to the side surface of the hollow pipe 11.

Next, while operating the negative pressure source (not shown) connected to the hollow pipe 11 to suck air from the suction opening 11a of the hollow pipe 11, the hollow pipe 11 is rotated and inserted into the container. Go. Then, the powder in the container C is sucked into the hollow pipe 11 and transferred to a predetermined powder storage device (not shown). Here, since the duct 12 is attracted to the side surface of the hollow pipe 11, the nozzle can be easily inserted into the container even if the opening A is narrow.

Then, when the tip of the suction nozzle is inserted into the container,
The air cylinder 27 is operated and the piston rod 29 is lowered. Then, the duct 12 is biased by the force of the torsion spring 36 in the direction to open outward in the radial direction. When the powder is sucked while rotating the duct 12 in this state, the duct 12 gradually opens against the resistance of the powder. Then, in the duct 12, the solidified powder is broken and stirred to maintain a state in which the powder is easily sucked.

Therefore, even powder that is solidified by moisture or the like can be easily sucked. Further, when the duct 12 is inclined outward in the radial direction and is opened in the upward direction, the partition plate 24 connected by the link 26 closes the through hole 23. As a result, the powder is sucked through the suction opening 11a having a large opening area, so that suction can be performed efficiently.

The duct 12 expands as the powder suction progresses and the hollow pipe 11 moves downward. When the suction opening 11a of the hollow pipe 11 approaches the container bottom surface D, the duct 12
Are in a state of protruding outward in the radial direction. Then, the partition plate 24 closing the through hole 23 opens inward, and the inside of the hollow pipe 11 and the inside of the duct 12 communicate with each other. This by duct
The powder inside 12 and the powder remaining on the bottom surface D of the container below the duct 12 can be sucked into the hollow pipe 11. In this way, the duct 12 can suck the powder on the bottom surface D of the container without rotating while rotating on the bottom surface D of the container. This action is similar to the action of the suction nozzle of the bottom vacuum cleaner.

In addition, since the inclined edge portion 21 is provided at the outer end portion of the second duct 14, the air is sucked through the gap below the inclined edge portion 21 and the powder on the outer peripheral portion of the container bottom surface D is efficiently transferred. Can be well aspirated. In addition, in the outer plate portion 20 of the second duct 14,
Since the brush 22 is provided, the powder adhering to the inner surface of the container body B can be brushed off.

On the other hand, the lid member 38 locked to the stopper 39 of the cover 37
Is placed on the edge of the opening A of the container C when the cover 37 descends together with the hollow pipe 11. Then, it is possible to prevent the powder from scattering out of the container C during the powder suction operation. Further, the inner peripheral edge of the lid member 38 and the cover
A slight gap S is formed between the outer peripheral surface of 37,
Since air flows from the outside to the inside through this,
It is possible to prevent the powder from leaking to the outside.

As described above, in the powder suction nozzle device, the duct 12 is divided into a direction in which the duct 12 protrudes outward in the radial direction with the end on the hollow pipe 11 side as a center and a direction in which the duct is parallel to the hollow pipe. Since the air cylinder 27 that swings the duct 12 is provided while being disposed so as to swing between the
Even in the container C in which the inside diameter of the opening A is smaller than the inside diameter of the container body B, the nozzle 12 can be inserted into the inside of the container C by folding the duct 12 upward so as to pass through the narrow opening A. Further, by rotating the duct 12, the powder in the outer peripheral portion of the container C can be broken and sucked, and therefore, it is possible to prevent the powder from remaining on the outer peripheral portion.

Further, since the through hole 23 that connects the first duct 13 and the inside of the hollow pipe 11 is formed when the duct 12 projects outward in the radial direction, the powder below the duct 12 is efficiently sucked. Therefore, the powder on the bottom surface D of the container can be sucked without exhaustion.

Further, since the lid member 38 is fitted and provided on the outer periphery of the cover 37 of the hollow pipe 11, the opening portion A of the container C can be covered by the lid member 38, so that the powder is scattered to the outside of the container C. Can be prevented. Also, the lid member 38
Although there is a slight gap S between the inner peripheral edge of the container and the outer peripheral surface of the cover 37, the air outside the container C flows into the container C through the gap S. It is possible to prevent leakage.

Next, another embodiment of the present invention will be described. 10 and 11 are views showing another example of the second duct. The second duct 51 has an air hole 52 for sucking secondary air in the outer plate portion 20, and a large number of cutout portions 53 at the lower end edges of the outer plate portion 20 and the side plate portion 19. Is provided. The second duct 51 is suitable for sucking a relatively heavy powder, and the powder remaining at the bottom of the container can be sucked efficiently by taking in secondary air.

12 and 13 are views showing still another example of the second duct. The second duct 61 is formed of a hollow pipe having a substantially rectangular cross section, and is formed so as to project radially outward from a connection portion with the first duct 13 and then project downward. An opening 63 is formed in the downward protruding portion 62. The second duct 61 is used for a container in which the outer circumference of the bottom is recessed downward. In such a case, it is desirable to increase the pressure difference and increase the wind speed for suction.

14 to 16 are views showing another example of a mechanism for opening and closing a through hole. In this opening / closing mechanism, the partition plate 24 is provided with a spring 71, and the partition plate 71 is provided with a through hole 23.
Is urged toward the closed state. This opening / closing mechanism
When the lower end of the hollow pipe 11 comes into contact with the bottom surface D of the container, the pressure difference between the inside of the hollow pipe 11 and the duct 12 increases, and the partition plate
24 is opened against the force of the spring 71. And
The powder in the duct 12 is sucked into the hollow pipe 11. This opening / closing mechanism has a large suction resistance because the partition plate 24 is biased by the spring 71, but has an advantage that excessive suction from the duct 12 can be prevented.

17 to 20 are views showing still another example of the opening / closing mechanism of the through hole. In this opening / closing mechanism, a through hole 81 is formed in the side wall of the lower end of the hollow pipe 11. Further, a vertically movable cylinder body 82 is fitted on the outer periphery of the lower end portion of the hollow pipe 11, and an opening portion 83 is formed in this cylinder body 82. A spring case 84 is provided above the cylindrical body 82 of the hollow pipe 11. A spring 85 is provided between the spring case 84 and the cylindrical body 82 to press the cylindrical body 82 downward. A locking pin 86 is provided above the through hole 81 of the hollow pipe 11. Then, the cylindrical body 82 urged by the spring 85 is in a predetermined position, that is, the opening 83 is displaced from the through hole 81, and the lower end of the cylindrical body 82 projects downward from the lower end of the hollow pipe 11. It is designed to stop at the position where you want to.

With such an opening / closing mechanism, when the lower end of the cylindrical body 82 is separated from or in contact with the container bottom surface D,
As shown in FIGS. 17 and 18, the opening 83 has a through hole 81.
And the through hole 81 is closed. Next, from this state, the hollow pipe 11 is moved further downward, and when the lower end of the hollow pipe 11 contacts the bottom surface D of the meter as shown in FIGS. 19 and 20, the cylindrical body 82 pushes the spring 85. It is pushed upward against the hollow pipe 11 against the pressure. Then, the opening 83 and the through hole 81 are overlapped and communicate with each other, and the powder is sucked from the duct 12 into the hollow pipe 11. In this way, the opening / closing mechanism can open / close the through hole 81 only by moving the hollow pipe 11 up and down.

In the above embodiment, the two ducts 12 and 12 are provided around the hollow pipe, but the number of ducts is not limited to this, and one duct or three or more ducts may be provided. In particular, if the number of ducts is one, the opening area at the tip of the nozzle is reduced, so that the suction force can be strengthened.

〔The invention's effect〕

As described above, according to the first aspect of the present invention, the through hole is formed in the side wall portion near the tip portion of the hollow pipe, is attached so as to be able to communicate with this through hole, and is provided with the opening portion in the longitudinal direction on the tip side. A formed elongated duct is provided, the base end of which is swingably attached to the hollow pipe, and an opening / closing mechanism is provided in the through hole, so that the duct is opened from the inner diameter of the container body. Even in a container having a small inner diameter, the nozzle can be inserted, and the powder on the outer peripheral portion and the bottom portion in the container can be sucked without leaving any residue. In addition, in the second invention, the first
In addition to the configuration of the invention, the outer periphery of the hollow pipe is covered with a tubular body, and the outer peripheral portion of the tubular body is formed so as to project further outward in the radial direction than the outer peripheral portion of the tubular body. Since the lid member that is movable in the axial direction of the hollow pipe is loosely fitted, in addition to the effect of the first invention, it is possible to prevent the powder from scattering outside the container during the suction operation. Is obtained.

[Brief description of drawings]

1 to 9 are views showing an embodiment of the present invention, wherein FIG. 1 is a front view thereof, FIG. 2 is a side view thereof, FIG. 3 is a plan view thereof, and FIG. 4 is a duct. FIG. 5, FIG. 5 is a plan view of the duct, FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 4, and FIG. 7 is a front sectional view showing the opening / closing mechanism of the through hole. 7 is a sectional view taken along the line VIII-VIII in FIG. 7 showing the opening / closing mechanism of the through hole, and FIG. 9 is a plane sectional view taken along the line IX-IX in FIG. 7 showing the opening / closing mechanism of the through hole. 10 and 11 are views showing another example of the second duct, in which FIG. 10 is a sectional view thereof, FIG. 11 is a side view thereof, FIG. 12 and FIG.
The figure is a diagram showing still another example of the second duct,
FIG. 12 is a sectional view thereof, FIG. 13 is a side view thereof, and FIGS. 14 to 16 are views showing another example of an opening / closing mechanism for a through hole, and FIG. 14 is a front sectional view thereof. FIG. 15 is a sectional view taken along the line XV-XV in FIG. 14 as viewed from the side of the arrow, FIG. 16 is a sectional view taken along the line XVI-XVI of FIG. 14 as seen in the direction of the arrow, and FIGS. FIG. 17 is a view showing still another example of the opening / closing mechanism of FIG. 17, FIG. 17 is a front sectional view when the through hole is in the closed state, and FIG. 18 is XVIII in FIG. 7 when the through hole is in the closed state. -A plane sectional view taken along the line XVIII, FIG. 19 is a front sectional view when the through hole is in the opened state, and FIG. 20 is XX in FIG. 19 when the through hole is in the opened state.
It is an arrow side sectional view which follows the XX line. 11 ...... hollow pipe, 11a ... suction opening, 12 ... duct, 13a ... opening, 14a ... opening, 23 ... through hole, 24
…… Partition board, 26 …… Link, 28 …… Frame, 37 ……
Cover, 38 ... lid member, 63 ... opening, 71 ... spring, 82 ... cylindrical body, 83 ... opening, 85 ... spring.

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-56-3225 (JP, A) JP-A-47-8921 (JP, A) JP-A-57-184021 (JP, A) Actual development Sho-61- 38133 (JP, U)

Claims (8)

[Claims] 1. A powder suction nozzle device comprising a hollow pipe having a suction opening at its tip and a negative pressure source connected to the rear end of the hollow pipe. A through hole is formed in the side wall portion near the portion, is attached so as to be able to communicate with this through hole, and a long and narrow duct having an opening formed in the longitudinal direction is provided on the distal end side. A powder suction nozzle device, wherein the powder suction nozzle device is swingably attached to a hollow pipe, and an opening / closing mechanism is provided in the through hole. 2. The duct comprises a first duct disposed on the hollow pipe side and a second duct detachably connected to an outer end portion of the first duct. The powder suction nozzle device according to claim 1, wherein 3. The powder suction nozzle device according to claim 2, wherein the second duct has a cutout portion at an opening edge portion of the opening portion. 4. The second duct is formed such that the opening is arranged at an outer end of the second duct and an opening edge of the opening is projected forward. The powder suction nozzle device according to claim 2, wherein 5. The opening / closing mechanism includes a partition plate pivotally supported on the upper end of the through hole so as to be openable and closable, the partition plate and the duct are connected to each other, and the partition plate corresponds to a swing position of the duct. The powder suction nozzle device according to claim 1, further comprising a link that opens and closes. 6. The partition plate, wherein the opening / closing mechanism is pivotally supported on the upper end of the through hole and is swingable between a closed state and an open state swinging into a hollow pipe, and the partition plate. 2. The powder suction nozzle device according to claim 1, further comprising a biasing unit that biases the member from the open state to the closed state. 7. The opening / closing mechanism includes a tubular body axially movable at the tip of the hollow pipe, and a biasing means for biasing the tubular body forward. Is communicated with the through hole when the tip of the tubular body is flush with the tip of the hollow pipe, and into the through hole when the tip of the tubular body projects further than the tip of the hollow pipe. 2. The powder suction nozzle device according to claim 1, wherein an opening is formed which is offset with respect to and does not communicate with the through hole. 8. A hollow pipe having a suction opening at its tip and having a through hole formed in a side wall near said tip, and a negative pressure source connected to the rear end of this hollow pipe. In a powder suction nozzle apparatus comprising: a hollow pipe, which is attached to the distal end of the hollow pipe so as to be able to communicate with the through hole and which has an elongated opening formed in the longitudinal direction on the distal end side. The base end of the hollow pipe is swingably attached to the hollow pipe, an opening / closing mechanism is provided in the through hole, and the outer periphery of the hollow pipe is covered with a tubular body. A powder suction nozzle device, wherein a lid member is formed on the outer peripheral portion so as to project further outward in the radial direction than the outer peripheral portion of the tubular body and is movable in the axial direction of the hollow pipe. .