JP6411285B2 - Filling nozzle, filling device and filling method - Google Patents

Description

  The present invention relates to a filling nozzle, a filling apparatus, and a filling method for filling an object to be filled into a container, and more particularly to a filling nozzle, a filling apparatus, and a filling method that are suitable for filling a liquid material containing a solid substance.

  In filling a liquid material containing a solid material, a filling nozzle called a cut nozzle may be used. A general cut nozzle includes a cylindrical nozzle body in which a discharge opening is formed at a lower end and an intake opening for filling material is formed on a side surface, and a piston that moves up and down in the nozzle body. In such a cut nozzle, the piston is lowered toward the discharge opening so that the lower end of the piston passes through the intake opening of the nozzle body, so that it is included in the liquid material that is caught on the inner periphery of the intake opening. The solid material can be cut (cut) by the lower end of the piston (see, for example, Patent Document 1 and Patent Document 2).

  When the solid matter is cut as described above, the solid matter is easily discharged from the inside of the nozzle body to the outside, so that the solid matter remaining in the nozzle body is suppressed from affecting the filling amount. Thereby, filling accuracy can be improved.

  On the other hand, in such a cut nozzle, when used for filling a liquid material (for example, squid salty) containing a solid material that is relatively large and difficult to cut, the solid material is not cut. The nozzle body may hang down from the lower end (discharge opening). Specifically, the solid matter is dragged by the piston without being cut, and the dragged solid matter is sandwiched between the outer peripheral surface of the piston and the nozzle body, so that the solid matter droops from the discharge opening. May occur. In consideration of this point, in the cut nozzle disclosed in Patent Document 2 described above, various devices for preventing the drooping are made.

  As an example, Patent Document 2 discloses a cylinder in which a cut nozzle having the same piston as described above that moves up and down in the nozzle body is communicated with an intake opening of the nozzle body and a supply port for an object to be filled is formed on a side surface thereof. And a piston that reciprocates in the cylinder are disclosed. In this cut nozzle, the above-described cylinder functions as a passage for supplying the filling material supplied from the supply port on the side surface thereof to the nozzle body. The piston in the cylinder can cut solid matter caught in the supply port when moving in the cylinder axial direction and passing through the supply port. According to such a configuration, since the solid matter can be cut by the two pistons, it is possible to suppress the situation where the solid matter is not cut, thereby preventing the solid matter from drooping.

JP-A-50-125896 JP 2000-264308 A

  By the way, in this type of nozzle, the most important point for obtaining the effect of preventing the solid from hanging down is whether or not the solid contained in the liquid can be reliably cut by the piston.

  However, the configuration according to Patent Document 2 described above can suppress the situation in which the solid matter is not cut by providing two pistons, but improves the performance of reliably cutting the solid matter in each piston. Not a thing. Therefore, there is a room for improvement in reliably and stably obtaining the drooping prevention effect by making it possible to cut solid matter with the piston.

  The present invention has been made in consideration of the above circumstances, and it is ensured and stable that the solid matter contained in the filling material hangs down from the nozzle tip (discharge opening) when filling the filling material. It is an object to provide a filling nozzle, a filling apparatus, and a filling method that can be prevented.

  In order to solve the above-mentioned problems, the filling nozzle of the present invention is formed in a cylindrical shape having a discharge opening at one end and an intake opening for filling material on a side surface, and the discharge nozzle is more than the intake opening in the inside. A nozzle body provided with a step portion protruding radially inward from the intake opening at a position on the opening side, and movable to the intake opening side region from the step portion in the nozzle body A cylindrical sleeve movable between an abutting position where one end abuts on the stepped portion and an open position separating one end from the stepped portion and opening the intake opening; It is movably disposed in the sleeve, and moves between a protruding position that protrudes to the discharge opening side from the stepped portion and a retracted position that is away from the intake opening in a direction opposite to the discharge opening side. Possible pistons.

In the filling nozzle of the present invention, when the sleeve is in the open position and the piston is in the retracted position, the filling material is supplied into the nozzle body from the intake opening, and the filling material is discharged from the discharge opening to the outside. The container can be discharged and filled into the container. Thereafter, by moving the sleeve to the contact position so that one end of the sleeve is in contact with the stepped portion, the intake opening is closed, and when there is a solid matter in the stepped portion, the solid matter is removed from the sleeve. It can cut between one end and the step part. Moreover, even when a solid substance is not cut by the one end and step part of a sleeve, a solid substance can be pinched | interposed between these. In this state, when the piston is moved to the protruding position, the one end of the sleeve and the stepped portion sandwich the solid material, so that the cutting force of the piston acts on the solid material in a stable state. Thereby, a solid substance can be cut reliably and stably. As a result, the solid material is prevented from being dragged to the discharge opening side without being cut by the piston. Even if the solid material is not cut, the solid material is sandwiched between one end of the sleeve and the stepped portion, so that the solid material is prevented from being dragged by the piston and moved to the vicinity of the discharge opening. Is done.
Therefore, when filling the filling material, it is possible to reliably and stably prevent the solid matter contained in the filling material from dripping from the nozzle tip (discharge opening).

  At least one of the one end of the sleeve and the stepped portion may be provided with a convex portion protruding toward the other.

According to this configuration, when the solid matter is sandwiched between the one end of the sleeve and the stepped portion, the convex portion locally abuts on the solid matter, thereby increasing the surface pressure acting on the sandwiched solid matter. Therefore, it becomes easy to cut solid matter. In particular, it becomes easy to cut solids of various sizes. Thereby, the dripping prevention effect can be improved.
Specifically, in the configuration in which the one end and the step portion of the sleeve are flat, a relatively large gap is formed between them when a relatively large solid is sandwiched. As a result, a small solid material cannot be sandwiched between them, and a situation in which the cutting force of the piston cannot be applied to the solid material in a stable state may occur. On the other hand, according to the configuration in which the convex portion is provided, the convex portion cuts or crushes a relatively large solid material between one end of the sleeve and the stepped portion, and the small solid material becomes one end of the sleeve. It becomes easy to cut solids of various sizes by being easily sandwiched between the stepped portions. As a result, the sagging prevention effect can be improved.

  Preferably, the convex portion may be formed in a tapered shape.

  According to this structure, the surface pressure which acts on a solid substance from a convex part increases. Thereby, a solid matter can be effectively cut between the one end of the sleeve and the stepped portion, so that the drooping prevention effect can be improved.

  The stepped portion may extend over the entire circumference of the nozzle body.

  According to this configuration, the solid matter can be sandwiched between one end of the sleeve and the entire region of the annular stepped portion. Thereby, the drooping prevention effect can be improved because many solids can be cut.

  In this case, a chamfered portion whose inner diameter dimension gradually decreases from the inner peripheral edge of the stepped portion toward the discharge opening side may be formed on the inner peripheral surface of the nozzle body.

  According to this configuration, even when the piston is misaligned, the piston is prevented from interfering with the inner peripheral edge of the stepped portion. Thereby, it becomes possible to move a piston appropriately.

  The nozzle main body has a main passage cylinder portion in which the intake opening is formed, the discharge opening is formed at a tip, and is detachably provided in the main passage tube portion so that the discharge opening at the tip is formed in the main passage tube portion. A nozzle tip tube portion that protrudes to the outside of the passage tube portion, and a base end of the nozzle tip tube portion disposed in the main passage tube portion may constitute the stepped portion.

  According to this configuration, in the nozzle body, the nozzle tip tube portion constituting the step portion can be arbitrarily removed from the main passage tube portion, so that maintenance is facilitated and desired depending on the type of the filling object, for example. It can be easily replaced with a nozzle tip tube portion having a step portion of the shape. Thereby, usability can be improved.

  Further, a filling apparatus according to the present invention includes the above-described filling nozzle, a tank that stores the filling object, and a supply unit that supplies the filling object stored in the tank to the filling nozzle. is there.

  Further, the filling method of the present invention is formed in a cylindrical shape having a discharge opening at one end and an intake opening for an object to be filled on the side surface, and at a position closer to the discharge opening than the intake opening in the inside thereof. A nozzle body provided with a stepped portion projecting inward in the radial direction from the intake opening; and a protruding position that is movably disposed in the nozzle body and projects to the discharge opening side from the stepped portion; A filling method using a filling nozzle comprising a piston movable between a retraction position spaced apart from the intake opening in a direction opposite to the discharge opening side, wherein the piston is set as the retraction position. In this state, a filling material is supplied into the nozzle body from the intake opening, the filling material is discharged from the discharge opening toward the outside, and the container is filled; and the nozzle body is pressed. Place the member A step of pressing the pressing member to the step portion, so as to pass through the pressing member, the filling method comprising the steps of moving the piston to the projected position is,.

According to the filling method of the present invention, after filling the material to be filled, the solid member is pressed between the pressing member and the step portion when the pressing member is pressed against the step portion so that the solid matter is present in the step portion. It can be cut with. Further, even when the solid material is not cut by the pressing member and the stepped portion, the solid material can be sandwiched between them. In this state, when the piston is moved to the protruding position, the pressing member and the stepped portion sandwich the solid material, so that the cutting force of the piston acts on the solid material in a stable state. Thereby, a solid substance can be cut reliably and stably. As a result, the solid material is prevented from being dragged to the discharge opening side without being cut by the piston. Even if the solid matter is not cut, the pressing member and the stepped portion sandwich the solid matter, thereby preventing the solid matter from being dragged by the piston and moved to the vicinity of the discharge opening. The
Therefore, when filling the filling material, it is possible to reliably and stably prevent the solid matter contained in the filling material from dripping from the nozzle tip (discharge opening).

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent reliably and stably that the solid substance contained in a to-be-filled material droops from a nozzle front-end | tip (discharge opening) at the time of filling to-be-filled material.

It is sectional drawing (initial state) of a filling apparatus provided with the filling nozzle which concerns on the 1st Embodiment of this invention. It is sectional drawing (measuring process) of the filling apparatus which concerns on 1st Embodiment. It is sectional drawing (filling preparation process) of the filling apparatus which concerns on 1st Embodiment. It is sectional drawing (filling process) of the filling apparatus which concerns on 1st Embodiment. It is sectional drawing (1st cut process) of the filling apparatus which concerns on 1st Embodiment. It is sectional drawing (2nd cut process) of the filling apparatus which concerns on 1st Embodiment. It is an enlarged view of the filling nozzle shown in FIG. It is a principal part enlarged view of FIG. (A) is an enlarged view of the filling nozzle in the filling preparation step and the filling step, (B) is an enlarged view of the filling nozzle in the first cutting step, and (C) is an enlarged view of the filling nozzle in the second cutting step. It is. (A) is sectional drawing of the intake opening periphery which shows the state in which solid substance exists around the intake opening of a nozzle main body after a filling process, (B) transferred to the 1st cut process from the state of (A). It is sectional drawing of the intake opening periphery at the time, (C) is sectional drawing of the intake opening periphery at the time of transfering to the 2nd cutting process from the state of (B). It is principal part sectional drawing of the filling nozzle which concerns on the 2nd Embodiment of this invention, (A) is a figure corresponding to a filling preparation process and a filling process, (B) is a figure corresponding to a 1st cut process. It is. It is sectional drawing of the filling nozzle which concerns on the 3rd Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
As shown in FIG. 1, the filling device 1 according to the present embodiment includes a tank 2, a rotary valve 3, a metering pump 4, and a filling nozzle 10. The tank 2 is a tank that stores an object to be filled (in this embodiment, a liquid material containing a solid material) 100. A supply port 21 for the filling object 100 is formed at the lower end of the tank 2, and the rotary valve 3 is connected to the supply port 21.

  In the filling apparatus 1 according to the present embodiment, the filling nozzle 10 discharges the filling object 100 supplied from the tank 2 via the rotary valve 3 downward as indicated by an arrow α in FIG. It supplies to the container which is not illustrated. In the following, the direction in which the arrow α is directed is referred to as the downward direction, and the opposite direction is referred to as the upward direction. However, the present invention is not construed as being limited to the direction described in the embodiment.

  The rotary valve 3 includes a housing 31 in which, for example, a cylindrical bore 31A is formed, and a rotor 32 that is rotatably disposed in the bore 31A. A flow path 33 (port) that opens in three directions is formed. The flow path 33 is connected to the filling nozzle 10 via a tank side flow path 33 </ b> A connected to the supply port 21 of the tank 2, a metering pump side flow path 33 </ b> B connected to the metering pump 4, and a piping member 34. Nozzle-side flow path 33C.

  The rotor 32 is cylindrical, and a flow path 36 that opens in three directions is formed. The rotor 32 is connected to a drive source such as a motor (not shown), and reciprocates between the first position (position shown in FIG. 1) and the second position (position shown in FIG. 3) in the housing 31. ing. The rotor 32 is configured to communicate the tank side flow path 33A and the metering pump side flow path 33B of the housing 31 through the flow path 36 and block the nozzle side flow path 33C at the first position. . In addition, the rotor 32 is configured to communicate the metering pump side flow path 33B and the nozzle side flow path 33C via the flow path 36 and to block the tank side flow path 33A at the second position.

  The metering pump 4 is connected to the cylindrical cylinder 41 whose upper end is connected to the metering pump side flow path 33B in the rotary valve 3, the metering piston 42 slidably disposed in the cylinder 41, and the piston 42. And a piston rod 43 extending downward. The piston rod 43 is configured to move up and down in the cylinder 41 by a drive source (not shown). Thereby, the metering piston 42 is located between a forward position close to the metering pump side flow path 33B as shown in FIG. 1 and a retreat position separated from the metering pump side flow path 33B by a predetermined distance as shown in FIG. It is supposed to go up and down.

  In the metering pump 4, when the tank side channel 33A and the metering pump side channel 33B are communicated with each other in the rotary valve 3, the metering piston 42 moves from the forward position to the reverse position, so The filling 100 is metered in the cylinder 41. Further, when the metering pump side flow path 33B and the nozzle side flow path 33C are communicated with each other in the rotary valve 3, the metering piston 42 moves from the retracted position to the advanced position, so that the filling object 100 having a predetermined filling amount is obtained. Is supplied to the filling nozzle 10 side. Here, in this Embodiment, the rotary valve 3 and the metering pump 4 respond | correspond to the supply means said by this invention.

  Next, as shown in an enlarged view in FIG. 7, the filling nozzle 10 of the present embodiment is a nozzle formed in a cylindrical shape having a discharge opening 11A at the lower end and an intake opening 11B for the filling object 100 on the side surface. A main body 11, a cylindrical sleeve 12 as a pressing member that is disposed in the nozzle main body 11 and is movable along the axial direction of the nozzle main body 11, and is disposed in the sleeve 12 along the axial direction of the sleeve 12. And a movable piston 13.

  The nozzle body 11 is provided with a step portion 11C that protrudes radially inward from the intake opening 11B at a position closer to the discharge opening 11A than the intake opening 11B. In the present embodiment, the inner peripheral surface of the nozzle body 11 is located on the upper side with respect to the position on the discharge opening 11A side (lower side) relative to the intake opening 11B, and the large diameter portion LD. The small-diameter portion SD is smaller in diameter than the large-diameter portion LD and is positioned below the large-diameter portion LD. A step surface is formed between the large-diameter portion LD and the small-diameter portion SD. A step portion 11 </ b> C is formed by the step surface, and the step portion 11 </ b> C extends over the entire circumference of the nozzle body 11 in the circumferential direction.

  FIG. 8 shows an enlarged view of the periphery of the step portion 11C. In this embodiment, the small diameter portion SD of the inner peripheral surface of the nozzle body 11 is connected to the discharge opening 11A side from the inner periphery of the step portion 11C. A chamfered portion 11D is formed in which the inner diameter dimension gradually decreases toward the surface.

  Further, as shown in FIG. 7, a cylindrical port portion 11E protruding outward in the radial direction is integrally formed at the outer peripheral portion of the intake opening 11B in the nozzle body 11, and the port portion 11E Is connected to the piping member 34 described above (see FIG. 1). Thereby, the to-be-filled material 100 is supplied to the intake opening 11B from the rotary valve 3 side via the piping member 34 and the port part 11E.

  The sleeve 12 is disposed in a region closer to the intake opening 11B than the step portion 11C in the nozzle body 11, that is, in the large diameter portion LD, and the lower end 12A is brought into contact with the step portion 11C as shown in FIG. It is movable between the contact position and an open position (see FIG. 9A) that separates the lower end 12A from the step portion 11C and opens the intake opening 11B. The sleeve 12 can be moved between the contact position and the open position by a drive source such as a pneumatic cylinder (not shown). The outer diameter of the sleeve 12 is set so that a slight gap is formed between the outer peripheral surface of the sleeve 12 and the inner peripheral surface of the large-diameter portion LD. Thereby, the occurrence of seizing in the filling nozzle 10 and the mixing of the metal powder (wear powder) into the object to be filled are prevented.

  Further, as shown in FIG. 7, the piston 13 has a protruding position where the lower end 13A protrudes to the discharge opening 11A side (downward side) from the step portion 11C and the lower end 13A is on the discharge opening 11A side, as shown in FIG. It is possible to move between a retracted position (see 9 (A)) that is separated from the intake opening 11 </ b> B in the opposite direction (upward side). Similar to the sleeve 12, the piston 13 can be moved between the protruding position and the retracted position by a driving source such as a pneumatic cylinder (not shown). When the piston 13 moves from the retracted position to the protruding position, it passes through the small diameter portion SD of the nozzle body 11 after passing through the stepped portion 11C, and in this example, its lower end 13A protrudes from the discharge opening 11A to the outside.

  As for the outer diameter of the piston 13, a slight gap is formed between the outer peripheral surface of the piston 13 and the inner peripheral surface of the sleeve 12 and the inner peripheral surface of the small diameter portion SD (the inner peripheral surface below the chamfered portion 11D). Is set to Thereby, generation | occurrence | production of the seizing in the filling nozzle 10 and mixing with the to-be-filled object of metal powder (wear powder) is prevented. In the present embodiment, the inner diameter of the inner peripheral surface of the sleeve 12 and the inner diameter of the inner peripheral surface below the chamfered portion 11D of the small diameter portion SD are set to be substantially the same.

  Next, the filling operation by the filling device 1 according to the present embodiment will be described.

  The filling device 1 shown in FIG. 1 is in an initial state. In this initial state, the metering piston 42 of the metering pump 4 is in the forward position close to the metering pump side channel 33B. The rotary valve 3 is in the first position described above, and the tank side flow path 33A and the metering pump side flow path 33B communicate with each other. In the filling nozzle 10, the sleeve 12 is in the above-described contact position, and the piston 13 is in the above-described protruding position.

  When filling is performed, first, the measuring step shown in FIG. 2 is performed from the initial state. As shown in FIG. 2, in the metering step, the metering piston 42 of the metering pump 4 is lowered and moved to the retracted position. Thereby, the filling object 100 in the tank 2 is sucked into the cylinder 41.

  Subsequently, a filling preparation step shown in FIG. 3 is performed. In this filling preparation step, the rotor 32 of the rotary valve 3 rotates toward the second position described above, and the metering pump side flow path 33B and the nozzle side of the housing 31 are rotated. The flow path 33C communicates with the tank side flow path 33A. In the filling nozzle 10, the sleeve 12 moves toward the above-described open position, and the piston 13 moves toward the above-described retracted position (see FIG. 9A).

  Thereafter, the filling step shown in FIG. 4 is performed. In this filling step, the metering piston 42 of the metering pump 4 moves upward and moves toward the aforementioned forward position, and pushes out the filling object 100 from the cylinder 41. The extruded filling object 100 flows into the intake opening 11 </ b> B of the filling nozzle 10 through the rotary valve 3. And the to-be-filled material 100 is discharged from 11 A of discharge openings, and is filled into the container which is not shown in figure installed below.

  Thereafter, the first cutting step shown in FIG. 5 is performed. In the first cutting step, the sleeve 12 moves toward the abutting position in the filling nozzle 10. FIG. 9B is an enlarged view of the filling nozzle 10 in the first cutting step. As shown in the figure, the sleeve 12 moves toward the contact position so that the lower end 12A of the sleeve 12 contacts the step portion 11C. On the other hand, in the first cutting step, the rotor 32 of the rotary valve 3 is rotated toward the first position before, after, or simultaneously with the movement of the sleeve 12 to the contact position.

  Here, as shown to FIG. 10 (A), after the filling process, the solid substance 101 contained in the to-be-filled material 100 may be caught on the inner periphery of the step part 11C or the intake opening 11B. In such a case, in the first cutting step, as shown in FIG. 10B, the sleeve 12 is moved to the contact position so that the lower end 12A of the sleeve 12 is in contact with the step portion 11C. While the entrance opening 11B is closed, the solid material 101 present in the step portion 11C can be cut between the lower end 12A and the step portion 11C. Further, as shown in FIG. 10B, even when a part of the solid substance 101 (the part indicated by 101A in the figure) is not cut by the lower end 12A and the step part 11C, the solid substance 101A is sandwiched between them. be able to.

  Then, the 2nd cutting process shown in FIG. 6 is performed. In the second cutting step, the piston 13 moves toward the above-described protruding position in the filling nozzle 10. FIG. 9C is an enlarged view of the filling nozzle 10 in the second cutting step. As shown in the figure, the piston 13 passes through the small diameter portion SD of the nozzle body 11 after passing through the stepped portion 11C, and protrudes the lower end 13A from the discharge opening 11A to the outside. Here, as described above, when the solid material 101A is sandwiched between the lower end 12A of the sleeve 12 and the stepped portion 11C, the piston 13 is moved to the protruding position as shown in FIG. At this time, the lower end 12A of the sleeve 12 and the stepped portion 11C sandwich the solid material 101A, so that the cutting force of the piston 13 acts on the solid material 101A in a stable state. Thereby, solid substance 101A can be cut reliably and stably.

  When the piston 13 reaches the protruding position, the filling object 100 remaining in the nozzle body 11 is filled into the container. After such a second cutting step, the filling device 1 returns to the initial state shown in FIG.

  In the filling device 1 of the present embodiment described above, the filling object 100 is supplied into the nozzle body 11 from the intake opening 11B when the sleeve 12 is in the open position and the piston 13 is in the retracted position. The filling object 100 can be discharged from the discharge opening 11 </ b> A to the outside and filled into the container. After that, when the sleeve 12 is moved to the contact position so that the lower end 12A of the sleeve 12 is in contact with the step portion 11C, the intake opening 11B is closed and a solid is present in the step portion 11C. Can cut the solid matter between the lower end 12A of the sleeve 12 and the step portion 11C. Further, even when the solid material is not cut by the lower end 12A and the step portion 11C of the sleeve 12, the solid material can be sandwiched between them. In this state, when the piston 13 is moved to the protruding position, the lower end 12A of the sleeve 12 and the stepped portion 13 sandwich the solid material, so that the cutting force of the piston 13 is stabilized to the solid material. Act on. Thereby, a solid substance can be cut reliably and stably. As a result, the solid matter is prevented from being dragged to the discharge opening 11A side without being cut by the piston 13. Even if the solid matter is not cut, the lower end 12A of the sleeve 12 and the step portion 11C sandwich the solid matter, so that the solid matter is dragged by the piston 13 and moves to the vicinity of the discharge opening 11A. Is prevented.

  Therefore, when filling the filling object 100, it is possible to reliably and stably prevent the solid matter contained in the filling object 100 from dripping from the nozzle tip (discharge opening 11A).

  Further, since the step portion 11C extends over the entire circumference in the circumferential direction of the nozzle body 11, a solid material can be sandwiched between the lower end 12A of the sleeve 12 and the entire region of the annular step portion 11C. Therefore, the drooping prevention effect can be improved by cutting many solids.

  In addition, since the chamfered portion 11E whose inner diameter dimension gradually decreases from the inner peripheral edge of the stepped portion 11C toward the discharge opening 11A side is formed on the inner peripheral surface of the nozzle body 11, the piston 13 is misaligned. Also, interference with the inner periphery of the step portion 11C is suppressed. Therefore, it becomes possible to move the piston 13 appropriately.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. FIG. 11A is a cross-sectional view of the main part of the filling nozzle according to the second embodiment corresponding to the filling preparation process and the filling process, and FIG. 11B is the second implementation corresponding to the first cutting process. It is principal part sectional drawing of the filling nozzle which concerns on this form. Of the components in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 11A, in the present embodiment, the shapes of the lower end 12A and the step portion 11C of the sleeve 12 are different from those of the first embodiment. That is, a sleeve side convex portion 121 that protrudes toward the step portion 11C is provided at the lower end 12A of the sleeve 12, and the step portion side convex portion that protrudes toward the lower end 12A of the sleeve 12 is provided at the step portion 11C. 111 is provided.

  In the present embodiment, when viewed in the axial direction of the nozzle body 11, the step-side convex portion 111 is formed on the inner side in the radial direction than the sleeve-side convex portion 121. In the axial direction, the step-side convex portion 111 is opposed to the flat portion 122 positioned on the inner side in the radial direction of the sleeve-side convex portion 121 at the lower end 12A, and the sleeve-side convex portion 121 is formed at the step portion 11C. It faces the flat portion 112 located outside the stepped portion-side convex portion 111 in the radial direction.

  Further, both the sleeve side convex portion 121 and the step side convex portion 111 are formed in a tapered shape. Among these, the sleeve-side convex portion 121 is formed such that its radially inner surface extends outward in the radial direction as it extends toward the stepped portion 11C. On the other hand, the step-side convex portion 111 extends radially outward as its radially inner surface extends toward the sleeve 11, and radially inner as its radially outer surface extends toward the sleeve 11. It is formed to extend. In the present embodiment, the radially inner surface of the sleeve-side convex portion 121 and the radially outer surface of the step-side convex portion 111 are substantially parallel. Further, the radially inner surface of the step-side convex portion 111 is connected to the chamfered portion 11E similar to that of the first embodiment, and the radial inner surface of the step-side convex portion 111 is chamfered. The part 11E is continuous in a straight line.

  In the present embodiment described above, when the solid material is sandwiched between the lower end 12A of the sleeve 12 and the step portion 11C, the convex portions 111 and 121 are locally sandwiched by the solid material. Since the surface pressure acting on the solid can be increased, the solid is easily cut. In particular, it becomes easy to cut solids of various sizes. Thereby, the dripping prevention effect can be improved.

  Specifically, in the configuration in which the lower end 12A and the step portion 11C of the sleeve 12 are flat, a relatively large gap is formed between them when a relatively large solid is sandwiched. As a result, a small solid cannot be sandwiched between them, and a situation in which the solid cannot be cut by the piston 13 may occur. On the other hand, as shown in FIG. 11 (B), according to the configuration according to the present embodiment, a relatively large solid material is formed between the lower end 12A of the sleeve 12 and the stepped portion 11C by the convex portions 111 and 121. 101 ′ is cut or crushed (in the example of the figure, crushed), and small solids (not shown) can be easily sandwiched between the lower end 12A of the sleeve 12 and the step portion 11C, so that various sizes can be obtained. It becomes easy to cut solids. As a result, the sagging prevention effect can be improved.

  Moreover, since the convex parts 111 and 121 are taper-shaped, the surface pressure which acts on a solid substance from the convex parts 111 and 121 increases. Thereby, since a solid substance can be effectively cut between the lower end 12A of the sleeve 12 and the stepped portion 11C, the drooping prevention effect can be improved.

(Third embodiment)
Next, a third embodiment of the present invention will be described. FIG. 12 is a cross-sectional view of a filling nozzle according to the third embodiment. Of the components in the present embodiment, the same components as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 12, in the present embodiment, the configuration of the nozzle body 11 is different from those in the first and second embodiments. That is, the nozzle body 11 of the present embodiment has a main passage cylinder portion 210 in which an intake opening 11B is formed and a discharge opening 11A in the tip, and is detachably provided in the main passage cylinder 210. And a nozzle tip cylinder portion 220 for projecting the discharge opening 11A to the outside of the main passage cylinder portion 210. And the base end of the nozzle front-end | tip cylinder part 220 arrange | positioned in the main channel | path cylinder part 210 comprises the step part 11C.

  Specifically, in the present embodiment, the inner peripheral surface of the main passage cylinder portion 210 is a large diameter portion positioned on the upper side with respect to the position on one side (lower side in this example) from the intake opening 11B. The small-diameter portion is smaller than the large-diameter portion and is positioned below the large-diameter portion, and a step surface is formed between the large-diameter portion and the small-diameter portion. This step surface functions as an installation surface 211 for installing the nozzle tip tube portion 220.

  The nozzle tip cylinder portion 220 is formed with an annular flange portion 221 that projects outward in the radial direction on the outer peripheral surface of the end portion on the side opposite to the end portion on which the discharge opening 11 </ b> A is formed. The end surface (upper surface) constitutes the proximal end of the nozzle distal end cylindrical portion 220. The nozzle tip cylinder part 220 is positioned by passing through the large diameter part of the main passage cylinder part 210 and bringing the lower surface of the flange part 221 into contact with the installation surface 211 in the axial direction. In this positioning state, the upper surface of the flange portion 221 is located inside the nozzle body 11 on the discharge opening 11A side with respect to the intake opening 11B and is more radial than the intake opening 11 when viewed in the axial direction of the nozzle body 11. By projecting inward, it functions as a stepped portion 11C.

  A pin passage hole 212 that penetrates in the radial direction is formed on the side surface of the main passage tube portion 210 on the side where the nozzle tip tube portion 220 is disposed, and a pin 213 is inserted into the pin passage hole 212. The pin 213 is inserted into a locking hole (not shown) formed on the outer peripheral surface of the nozzle tip cylinder part 220. Thereby, the nozzle tip cylinder part 220 is positioned in the axial direction and the circumferential direction.

  In the present embodiment described above, in the nozzle body 11, the nozzle tip cylinder part 220 constituting the step part 11C can be arbitrarily removed from the main passage cylinder part 210. Depending on the type of filling, the nozzle tip tube portion 220 having the desired step portion 11C can be easily replaced. Thereby, usability can be improved.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments.

  For example, in the filling nozzle 10, a configuration is adopted in which the piston 13 is hollow, an air hole is formed in the lower end 13 </ b> A or the side surface of the lower end portion, and the filling material attached to the piston 13 is blown into the container by the air from the air hole. May be. Moreover, the structure which rotates the piston 13 simultaneously with an axial direction movement may be employ | adopted. Moreover, the structure which sets the diameter dimension in the lower end part of piston 13 to a small diameter on the upper side, and a large diameter on the lower side may be employ | adopted. Furthermore, the structure which combined each structure demonstrated above may be employ | adopted.

  Moreover, in each above-mentioned embodiment, although the axial direction of the filling nozzle 10 is a structure which follows an up-down direction, the axial direction of the filling nozzle 10 may be along a horizontal direction, for example. Moreover, in 2nd Embodiment, although a convex part is formed in both the lower end 12A and the step part 11C of the sleeve 12, a convex part may be formed only in one of these.

DESCRIPTION OF SYMBOLS 1 Filling device 2 Tank 3 Rotary valve 4 Metering pump 10 Filling nozzle 11 Nozzle main body 11A Discharge opening 11B Intake opening 11C Step part 11D Chamfering part 12 Sleeve 12A Lower end 13 Piston 13A Lower end 31 Housing 32 Rotor 33 Channel 33A Tank side channel 33B Metering pump side channel 33C Nozzle side channel 36 Channel 41 Cylinder 42 Metering piston 43 Piston rod 100 Filled material 111 Step portion side convex portion 121 Sleeve side convex portion 210 Main passage cylindrical portion 220 Nozzle tip cylindrical portion

Claims (8)

It is formed in a cylindrical shape having a discharge opening at one end and an intake opening for filling material on the side surface, and in a position closer to the discharge opening than the intake opening in the inside thereof, is more radial than the intake opening. A nozzle body provided with a stepped portion projecting inward;
The nozzle body is disposed so as to be movable in a region closer to the intake opening than the stepped portion in the nozzle body, and a contact position where one end is contacted to the stepped portion, one end is separated from the stepped portion, and A cylindrical sleeve movable between an open position for opening the intake opening;
Between the protruding position that is movably disposed in the sleeve and protrudes to the discharge opening side from the stepped portion, and a retracted position that is separated from the intake opening in a direction opposite to the discharge opening side. A filling nozzle comprising a movable piston;   2. The filling nozzle according to claim 1, wherein at least one of the one end of the sleeve and the stepped portion is provided with a convex portion protruding toward the other.   The filling nozzle according to claim 2, wherein the convex portion is formed in a tapered shape.   The filling nozzle according to any one of claims 1 to 3, wherein the stepped portion extends over the entire circumference of the nozzle body in the circumferential direction.   The filling nozzle according to claim 4, wherein a chamfered portion whose inner diameter dimension gradually decreases from the inner peripheral edge of the stepped portion toward the discharge opening side is formed on the inner peripheral surface of the nozzle body. The nozzle body has a main passage cylinder portion in which the intake opening is formed, the discharge opening is formed at a tip, and is detachably provided in the main passage tube portion so that the discharge opening at the tip is formed in the main passage tube. A nozzle tip tube portion projecting to the outside of the portion,
The filling nozzle according to any one of claims 1 to 5, wherein a base end of the nozzle tip tube portion arranged in the main passage tube portion constitutes the stepped portion. A filling nozzle according to any one of claims 1 to 6,
A tank for storing the filling material;
And a supply means for supplying an object to be filled stored in the tank to the filling nozzle. It is formed in a cylindrical shape having a discharge opening at one end and an intake opening for filling material on the side surface, and in a position closer to the discharge opening than the intake opening in the inside thereof, is more radial than the intake opening. A nozzle body provided with a stepped portion projecting inward, a protruding position that is movably disposed in the nozzle body and protrudes toward the discharge opening side from the stepped portion, and a direction opposite to the discharge opening side And a piston that is movable between a retracted position that is separated from the intake opening, and a filling method that uses a filling nozzle,
The nozzle body is disposed so as to be movable in a region closer to the intake opening than the stepped portion in the nozzle body, and a contact position where one end is contacted to the stepped portion, one end is separated from the stepped portion, and Provide a holding member that can move between the open position to open the intake opening,
In the state where the piston is in the retracted position and the pressing member is in the open position, the filling material is supplied into the nozzle body from the intake opening, and the filling material is discharged from the discharge opening to the outside. A process of discharging toward and filling the container;
Moving the pressing member to the contact position;
And a step of moving the piston to the protruding position so as to pass through the pressing member at the contact position .

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