Nozzle Device

Abstract

To provide a nozzle device allowed to improve the efficiency of production without a scatter of a to-be-charged matter.SOLUTION: A nozzle device comprises a cylinder 2 cylindrical in shape to feed a to-be-charged matter 9, an outer nozzle 3 cylindrical in shape having at least one end 3a inserted to the cylinder 2 and the other end 3b having an opening 4, a nozzle head 5a arranged within the outer nozzle 3 and for closing the opening 4, and a moving mechanism 10 for moving the outer nozzle 3 relatively to the cylinder 2 and the nozzle head 5a. The moving mechanism 10 opens the opening 4 by moving the outer nozzle 3 toward the one end 3a and closes the opening 4 by moving the outer nozzle 3 toward the other end 3b.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a nozzle device. [Background technology]

[0002] 2. Description of the Related Art Conventionally, nozzles for filling machines for supplying liquid, sol, or other filling materials to containers have been developed and put to practical use. As this type of nozzle, for example, a nozzle device described in Patent Document 1 is known.

[0003] The nozzle device of Patent Document 1 includes a nozzle head that opens and closes an opening. The filling material that flows down inside the cylindrical outer nozzle is allowed or blocked from being discharged from the opening by opening or closing the nozzle head. According to the conventional technology, when filling, the nozzle head moves downward to open the opening, and the filling material in the outer nozzle is discharged from the opening and supplied into the container. When the filling is completed, the nozzle head moves upward so that the nozzle head comes into contact with the opening from below and closes the opening, thereby blocking the filling material being discharged from the opening. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6850475 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in a conventional nozzle device, the nozzle head is moved upward when filling is completed, so that the filling material dropping from the opening collides with great force against the nozzle head which rises in the opposite direction. This causes the filling material to bounce upward or to the side of the nozzle head and scatter around. If the scattered filling material adheres to the inner surface of the container opening, the container's airtightness will be compromised. Furthermore, if the filling time is set long to prevent scattering, production efficiency will decrease. For this reason, further improvements were necessary.

[0006] In order to solve the above problems, the nozzle device of the present invention includes a cylindrical cylinder for supplying a filling material, a cylindrical outer nozzle having at least one end inserted into the cylinder and an opening on the other end, and an inner wall of the outer nozzle. an inner nozzle housed in the nozzle hole; and a nozzle hole provided at the tip of the inner nozzle. The nozzle head closes the opening, and a moving mechanism moves the outer nozzle relative to the cylinder and the nozzle head. The opening has an inner tapered surface that expands radially outward toward the tip, and the outer peripheral surface of the nozzle head has an outer tapered surface that expands radially outward toward the tip, the inner nozzle has a flow straightening portion that has a recess in the outer wall, and the recess extends along the axial direction of the flow straightening portion to the nozzle head provided at the tip, The movement mechanism opens the opening by moving the outer nozzle to one end side, and moves the outer nozzle to the other end side, The inner tapered surface abuts against the outer tapered surface to close the opening. , which is its characteristic. [Means for solving the problem]

[0007] In order to solve the above problems, the nozzle device of the present invention includes a cylindrical cylinder that supplies a filling material, a cylindrical outer nozzle having at least one end inserted into the cylinder and an opening at the other end, a nozzle head that is disposed inside the outer nozzle and closes the opening, and a movement mechanism that moves the outer nozzle relative to the cylinder and the nozzle head. The movement mechanism is characterized in that it opens the opening by moving the outer nozzle to one end, and closes the opening by moving the outer nozzle to the other end. Effect of the Invention

[0008] According to the present invention, a nozzle device is provided that can improve production efficiency without scattering the filled material. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a vertical cross-sectional view of the entire nozzle device according to the embodiment of the present invention, showing a closed state. [Diagram 2]FIG. 2 is a vertical cross-sectional view of the entire nozzle device according to the embodiment, showing an open state. [Diagram 3] FIG. 4 is a vertical cross-sectional view of the periphery of an opening in the nozzle device according to the embodiment in an open state. [Figure 4] FIG. 11 is a plan view comparing the distribution of the discharged filler with the conventional scattering range. [Diagram 5] 11 is a perspective view showing a state in which the rotation angle of the nozzle device is changed. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the description, the same elements are given the same reference numerals, and duplicated description will be omitted.

[0011] 1 includes a cylindrical cylinder 2 that supplies a filler 9, and a cylindrical outer nozzle 3 having at least one end 3a inserted into the cylinder 2 and an opening 4 at the other end 3b. The nozzle device 1 also includes a nozzle head 5a that is disposed inside the outer nozzle 3 and closes the opening 4, and a movement mechanism 10 that moves the outer nozzle 3 relative to the cylinder 2 and the nozzle head 5a. The filling material 9 in the embodiment is mainly a liquid having fluidity. The nozzle device 1 is used when filling a container 30 (FIG. 5) or the like with a predetermined amount of the filling material 9. The liquid also includes semi-liquids (viscous bodies) in the form of gel, grease, or slime. Specifically, the liquid may be any type of viscosity, such as shampoo, rinse, conditioner, or other treatment liquid, or various oils.

[0012] Of these, the cylinder 2 in the embodiment has an upper part, a middle part, and a lower part made of a cylindrical metal material divided into three parts, which are connected in the vertical direction. Although the cylinder 2 is divided into three parts in the embodiment, the cylinder 2 may be divided into two parts or may be composed of a single unit. The upper part of the cylinder 2 has a shaft support part 26 that rotatably supports a joint shaft 15, which will be described later. The joint shaft 15 is provided with a first joint portion 15a, which connects the inner nozzle 5 having the nozzle head 5a to its lower end, and a second joint portion 15b. The second joint portion 15b has its lower end connected to the upper end of the first joint portion 15a, and its upper portion is journaled on the shaft support portion 26.

[0013] 5, the upper part of the cylinder 2 in the embodiment has a fixed lever 25 that stops the rotation of the joint shaft 15, and a rotation prevention shaft that protrudes from the fixed lever 25 and screws into a screw hole that opens into a side wall of the upper part of the cylinder 2. In addition, a cylindrical knob 28 is provided on the upper end of the second joint part 15b, and the joint shaft 15 can be rotated about its axis by rotating the knob 28. Furthermore, an annular recess 27 that is one step lower than the outer circumferential surface is formed at the upper portion of the second joint part 15b at a position facing the tip of the anti-rotation shaft. When the tip of the anti-rotation shaft abuts against the annular recess 27, the rotation of the joint shaft 15 around its axis stops. This allows the nozzle head 5a to be stopped at a desired rotation angle.

[0014] A lid 2b is provided between the upper and middle parts of the cylinder 2 to close the internal space of the middle part. The second joint part 15b is rotatably inserted into the lid 2b. A plurality of rubber seal ring members are disposed between the lid 2b and the first joint part 15a or the peripheral wall 2a of the cylinder 2 to provide a watertight seal.

[0015] In addition, a supply pipe 2c is connected to the outer side of the peripheral wall 2a of the intermediate portion of the cylinder 2 so as to be perpendicular to the axial direction. The supply pipe 2c may be connected to the peripheral wall 2a of the cylinder 2 so that the axial direction is directed obliquely downward. The filler 9 introduced into the cylinder 2 from a storage tank (not shown) via the supply pipe 2c flows down through the internal space toward the lower end side of the cylinder 2.

[0016] The outer nozzle 3 is made of, for example, a metal material, and is integrally formed in the vertical direction with a large-diameter upper portion 3c provided with the piston portion 11 and a relatively small-diameter front portion sandwiching a reduced diameter portion therebetween. The outer nozzle 3 allows the internal spaces of the upper portion 3c, the reduced diameter portion and the front portion to communicate with each other in the axial direction. One end side 3a of the upper part 3c is inserted into the inside of the lower part of the cylinder 2 so as to be movable up and down along the axis of the cylinder 2. A communication opening is formed in the one end side 3a. The internal space of the lower part of the cylinder 2 communicates with the internal space of the outer nozzle 3 via the communication opening.

[0017] Furthermore, an opening 4 is provided on the other end side 3b in the front part of the outer nozzle 3. The opening 4 in this embodiment forms an inner tapered surface 4a that expands radially outward toward the tip. The inner diameter of the inner peripheral surface of the front part, except for the inner tapered surface 4a, is constant along the axial direction. Then, the filler 9 that has flowed down toward the lower end side of the cylinder 2 enters the internal space of the large diameter part of the outer nozzle 3 from the opening at one end side 3a. The filler 9 that has passed through the reduced diameter part and the internal space at the front of the outer nozzle 3 is discharged downward from the nozzle device 1 from the opening 4 at the other end side 3b.

[0018] Moreover, the nozzle head 5a in the embodiment is integrally provided at the tip of the inner nozzle 5 made of a metal material. The front side (lower side in the embodiment) of the opening 4 comes into contact with the nozzle head 5a from above as the outer nozzle 3 moves in the vertical direction. This causes the opening 4 to open and close, allowing or blocking the discharge of the filler 9.

[0019] The nozzle head 5a of the embodiment has an outer tapered surface 5d formed on its outer circumferential surface, which expands radially outward toward the tip and can contact the inner tapered surface 4a of the opening 4. The outer tapered surface 5d contacts the underside of the descending inner tapered surface 4a. When filling is completed, the outer tapered surface 5d cooperates with the inner tapered surface 4a to block the filling material 9 being discharged from the opening 4.

[0020] In the nozzle device 1 of the embodiment, the inclination angles of the outer tapered surface 5d and the inner tapered surface 4a are set to be the same or equivalent. The inclination angles of the outer tapered surface 5d and the inner tapered surface 4a are appropriately set in consideration of the viscosity of the filling 9 and the like. For example, it is preferable that each inclination angle is set within the same range of about 30 degrees to 60 degrees. In addition, the inclination angle of the outer tapered surface 5d and the inclination angle of the inner tapered surface 4a may be different, and different inclination angles may be set as long as they are within the same range in which the opening 4 can be blocked and the filling 9 can be blocked.

[0021] Moreover, the inner nozzle 5 of the embodiment has a flow straightening portion 5b having a recess 5c recessed into an outer wall. The flow straightening portion 5b is accommodated in a front portion of the outer nozzle 3. The recess 5c extends along the axial direction of the flow straightening portion 5b to a nozzle head 5a provided at the tip thereof.

[0022] The moving mechanism 10 of the embodiment opens the opening 4 by moving the outer nozzle 3 toward one end side 3a as shown in FIG. 1, and closes the opening 4 by moving the outer nozzle 3 toward the other end side 3b as shown in FIG. 2. The moving mechanism 10 has a piston portion 11 provided on the upper portion 3c of the outer nozzle 3, an air chamber 12 provided between the cylinder 2 and the piston portion 11, and an air actuator 13 that supplies air to the air chamber 12 to move the piston portion 11.

[0023] Of these, the air chamber 12 has a first air chamber 12a that moves the piston portion 11 toward the nozzle head 5a by supplying air 8a as shown in FIG. 1, and a second air chamber 12b that is located on the other end side 3b from the first air chamber 12a and moves the piston portion 11 in a direction away from the nozzle head 5a by supplying air 8d as shown in FIG. 2. In the embodiment, the gap between the first air chamber 12a and the second air chamber 12b is sealed by a rubber O-ring member 19. More specifically, an annular flange portion is provided in a protruding manner at a vertically middle portion of the outer peripheral wall 11a of the piston portion 11. An annular groove is provided in the outer peripheral surface of the annular flange portion. The O-ring member 19 is fitted in the annular groove and is in sliding contact with the inner surface of the peripheral wall 2a. This seals the gap between the first air chamber 12a and the second air chamber 12b, and the air in the air chamber 12 does not leak between the first air chamber 12a and the second air chamber 12b.

[0024] In addition, the piston portion 11 has an annular seal portion 16 on the outer peripheral wall 11a, which is in sliding contact with the inner surface of the outer peripheral wall 2a of the cylinder 2 to seal the air chamber 12. The annular seal portion 16 has a pair of annular grooves 3d, 3d on one end side 3a of the outer peripheral wall 11a. Each annular groove 3d is formed in a concave shape that is open in the outer radial direction, and a lip seal 18 is attached in the axial direction. The two lip seals 18 are made of rubber and are arranged side by side at a specified interval. Each lip seal 18 has an inner lip and an outer lip that are elastically deformable inward and outward in the radial direction, and has a V-shaped cross section that opens the other end side 3b or the one end side 3a, respectively.

[0025] When pressure is applied from the V-shaped opening direction, each lip seal 18 expands the V-shaped cross section inward and outward radially, so that the inner lip and the outer lip are pressed against the outer peripheral wall 11a of the piston portion 11 and the inner surface of the peripheral wall 2a of the cylinder 2, respectively. Therefore, even if the piston portion 11 moves in either the upward or downward direction, at least one of the lip seal materials 18 prevents the air in the first air chamber 12a or the filler 9 in the cylinder 2 from leaking.

[0026] Furthermore, the piston portion 11 has a metallic annular seal ring member 17 between the outer peripheral wall 11a of the other end side 3b of the second air chamber 12b and the peripheral wall 2a of the cylinder 2. A plurality of rubber O-ring members 20 are provided between the annular seal ring member 17 and the outer peripheral wall 11a or the peripheral wall 2a, respectively, to provide a seal so that air does not leak from the front side of the second air chamber 12b to the outside. therefore, Switching valve 22 The air supplied by the switching of the first air chamber 12a and the second air chamber 12b presses the piston portion 11 from one side of the first air chamber 12a or the second air chamber 12b, moving it in either the up or down direction. At this time, the air inside is smoothly discharged from the first air chamber 12a or the second air chamber 12b, where the space is reduced. This allows the outer nozzle 3 to move in the up and down direction even faster.

[0027] Furthermore, the moving mechanism 10 of the embodiment is Switching valve It has 22. Switching valve The air actuator 22 can selectively switch the air supplied from the air actuator 13 to the air chamber 12 to either the first air chamber 12a or the second air chamber 12b. A first air passage 22a communicating with the first air chamber 12a and a second air passage 22b communicating with the second air chamber 12b are formed in the peripheral wall 2a of the cylinder 2 so as to penetrate inwardly and outwardly. and, Switching valve 22 alternately switches the air supplied from the air actuator 13 between a first air passage 22a and a second air passage 22b.

[0028] For example, when air 8a from the air actuator 13 passes through the first air passage 22a and is supplied to the first air chamber 12a, the outer nozzle 3 moves to the other end side 3b together with the piston portion 11. As a result, the opening 4 comes into contact with the nozzle head 5a and is closed (see FIG. 1). At this time, since the O-ring member 19 seals the space between the first air chamber 12a and the second air chamber 12b, the air 8b in the second air chamber 12b is pressed and discharged to the outside through the second air passage 22b without leaking.

[0029] Furthermore, when air 8d from the air actuator 13 passes through the second air passage 22b and is supplied to the second air chamber 12b, the outer nozzle 3 moves to the one end side 3a together with the piston portion 11 to open the opening 4 (see FIG. 2). At this time, since the space between the first air chamber 12a and the second air chamber 12b is sealed by the O-ring member 19, the air 8c in the first air chamber 12a is pressed and discharged to the outside from the first air passage 22a.

[0030] In an embodiment, Switching valve The outer nozzle 3 can be moved to one end side 3a or the other end side 3b by switching 22. For example, as shown in Fig. 1, the outer nozzle 3 can be moved upward to separate the opening 4 from the nozzle head 5a, thereby opening the opening 4. Also, as shown in Figure 2 Switching valve When 22 is switched to the opposite side, the outer nozzle 3 moves downward, whereby the opening 4 comes into contact with the nozzle head 5a, and the opening 4 can be closed.

[0031] The nozzle device 1 of this embodiment described above includes a cylindrical cylinder 2 that supplies the filling 9, a cylindrical outer nozzle 3 having at least one end side 3a inserted into the cylinder 2 and an opening 4 at the other end side 3b, a nozzle head 5a that is disposed inside the outer nozzle 3 and closes the opening 4, and a movement mechanism 10 that moves the outer nozzle 3 relative to the cylinder 2 and the nozzle head 5a. The movement mechanism 10 opens the opening 4 by moving the outer nozzle 3 to the one end side 3a, and closes the opening 4 by moving the outer nozzle 3 to the other end side 3b.

[0032] The nozzle device 1 of the embodiment thus configured can improve production efficiency without scattering the filler 9. More specifically, when starting filling, as shown in Fig. 2, the movement mechanism 10 moves the outer nozzle 3 toward one end side 3a (upward) relative to the cylinder 2 and the nozzle head 5a to open the opening 4. This allows the filling material 9 supplied from the cylinder 2 to be discharged from the opening 4 (see Fig. 3). Then, as shown in Fig. 5, the filling material 9a flows down into the container 30 and is filled in the desired amount. 1, when filling is completed, the movement mechanism 10 moves the outer nozzle 3 to the other end side 3b relative to the cylinder 2 and the nozzle head 5a to close the opening 4. As a result, the filling material 9 that was being discharged from the opening 4 is blocked. As shown in Fig. 3, in the operation of closing the opening 4, the outer nozzle 3 moves downward toward the other end side 3b in the same direction as the filling material 9 is discharged from the opening 4, shielding the surroundings of the nozzle head 5a (see Fig. 1). In addition, the nozzle head 5a is supported by the cylinder 2 and does not move in the vertical direction. Therefore, the speed at which the filling material 9 comes into contact with the nozzle head 5a remains the same as when filling, and the filling material 9 does not scatter around. This eliminates the need to slow down the filling speed, improving production efficiency.

[0033] In Figures 3 and 4, the ejection direction of the filler 9a in the nozzle device 1 of the embodiment is illustrated and explained in comparison with the direction in which the filler 9b scatters when a conventional outward-opening type nozzle device is closed (see virtual line). For example, in a conventional nozzle device of the outward opening type, when the nozzle head 5a is moved downward to open the opening 4 and then moved upward to close the opening 4, the filler 9 discharged downward from the opening 4 collides with the outer tapered surface 5d of the rising nozzle head 5a with great force. As a result, the filler 9b bounces up and scatters around the nozzle head 5a as shown in FIG. 3 (see FIG. 4). The scattered filler 9b adheres to the inside of the upper opening 30a of the container 30 as shown in FIG. 5. Therefore, it is necessary to adjust the filling speed to be slow. In addition, it is necessary to provide a process for removing the scattered filler 9 so as not to damage the sealing of the container, which reduces production efficiency.

[0034] In contrast, in the nozzle device 1 of the embodiment, when the opening 4 is closed, the filler 9 being discharged from the opening 4 is blocked by the peripheral wall of the other end side 3b of the outer nozzle 3 which moves downward at the same time as the opening 4 is closed as shown in Fig. 3. Therefore, the filler 9a is not scattered around as shown in Fig. 4, but is filled into the container 30 (see Fig. 5). Therefore, the step of removing the scattered filler 9 is not required, and the filling can be completed in a short time, and the upper opening 30a of the container 30 can be closed in a short time, improving production efficiency.

[0035] In addition, since one end side 3a of the outer nozzle 3 is inserted into the cylinder 2, a back pressure is applied downward by the filler 9 in the cylinder 2. Therefore, the downward movement speed of the outer nozzle 3 can be easily made faster than the upward movement speed. For example, the downward movement speed of the outer nozzle 3 can be set to be equal to or faster than the falling speed of the discharged filler 9. As a result, when the filler 9 abuts against the nozzle head 5a, the opening 4 is closed at the same time or earlier, so that the surroundings of the nozzle head 5a can be reliably blocked off.

[0036] The movement mechanism 10 has a piston portion 11 provided in the outer nozzle 3, an air chamber 12 provided between the cylinder 2 and the piston portion 11, and an air actuator 13 that supplies air to the air chamber 12 to move the piston portion 11.

[0037] When air is supplied to the air chamber 12 by the air actuator 13, the outer nozzle 3 having a piston portion 11 thereon moves to open and close the opening 4. This eliminates the need to provide a piston member or the like that is made up of a separate member from the outer nozzle 3, allowing for a simplified structure.

[0038] The movement mechanism 10 also has an annular seal portion 16 on an outer peripheral wall 11 a of the piston portion 11 that slides against a peripheral wall 2 a of the cylinder 2 to seal the air chamber 12 . The annular seal portion 16 moves together with the piston portion 11. Therefore, no suction action occurs between the piston portion 11 and the peripheral wall 2a of the cylinder 2.

[0039] In particular, in the embodiment, the annular seal portion 16 has a lip seal material 18 attached to an annular groove 3d formed in a concave shape in the outer circumferential wall 11a, so that even if the piston portion 11 moves, the annular seal portion 16 does not shift in the axial direction from the one end side 3a. Furthermore, when a concave groove is formed on the inner surface of the peripheral wall 2a, air bubbles sucked in by the suction action may be discharged from the opening 4 together with the filling 9. In contrast, the annular seal portion 16 of the embodiment moves together with the piston portion 11, so no suction action occurs. Therefore, air bubbles are not discharged from the opening 4 together with the filling 9, the volume of the filling 9 does not change, and the amount of the filling 9 filled in the container 30 can be stabilized, which also improves productivity.

[0040] Furthermore, the annular seal portion 16 of the embodiment is provided with a pair of lip seal members 18 each having a V-shaped cross section that opens the other end side 3b or the one end side 3a, respectively. Therefore, when the piston part 11 moves toward either the other end side 3b or the one end side 3a, the V-shaped lip seal material 18 opens due to the pressure applied from the direction of movement and comes into close contact with the surroundings, thereby further improving the sealing performance.

[0041] 1, the air chamber 12 has a first air chamber 12a that moves the piston portion 11 toward the nozzle head 5a by supplying air, and a second air chamber 12b that moves the piston portion 11 in a direction away from the nozzle head 5a. The movement mechanism 10 forms a first air passage 22a that communicates with the first air chamber 12a and a second air passage 22b that communicates with the second air chamber 12b, which penetrate the peripheral wall 2a of the cylinder 2 in the inward and outward directions.

[0042] The movement mechanism 10 alternately switches the air supplied from the air actuator 13 to the first air passage 22a or the second air passage 22b. Switching valve It has 22. For this reason, Switching valveWhen the supply destination of the air 8 is switched to the first air passage 22a or the second air passage 22b by the air actuator 13, air 8a, 8d is selectively supplied to the first air chamber 12a or the second air chamber 12b from the air actuator 13. Therefore, the outer nozzle 3 can be moved to one end side 3a or the other end side 3b using one air actuator 13 to open and close the opening 4.

[0043] The nozzle device 1 also has a joint shaft 15 that supports the nozzle head 5a rotatably in the circumferential direction, and a knob 28 that rotates the joint shaft 15. In this embodiment, as shown in Fig. 5, the tip of the anti-rotation shaft is moved away from the annular recess 27 by rotating the fixing lever 25. This allows the joint shaft 15 supported by the shaft support part 26 (see Fig. 1) to rotate freely. Therefore, the operator can change the direction of the nozzle head 5a around the shaft by rotating the knob 28 at the upper end left and right. Then, at the desired rotation angle, the fixing lever 25 is rotated again in the opposite direction until the tip of the anti-rotation shaft abuts against the annular recess 27. This stops the rotation of the joint shaft 15 and fixes the inner nozzle 5 at the desired angle. For example, there are cases where a recess 5c is formed in the outer wall of the flow straightening section 5b, and a direction in which the filler 9 is discharged is given. In such a case, the operator can change the direction of the filling material 9 discharged from the opening 4 by operating the knob 28 and the fixed lever 25. This allows the discharge direction of the filling material 9 to be oriented in accordance with the shape of the container 30 to be filled, for example, the wide direction of the upper opening 30a, thereby enabling efficient filling and preventing scattering. Therefore, it is possible to further improve production efficiency, which is a practically beneficial effect.

[0044] Although the embodiment of the present invention has been described in detail above with reference to the drawings, the present invention is not limited to this and can be modified as appropriate without departing from the spirit of the invention. For example, the moving mechanism 10 of the embodiment is configured to include an air actuator 13 that moves the piston portion 11 provided in the outer nozzle 3 by air supplied to an air chamber 12. However, the present invention is not particularly limited to this. For example, the moving mechanism may include a motor actuator, an electromagnetic actuator, or a mechanical actuator having a gear mechanism or a link mechanism. Furthermore, the movement mechanism 10 may be any mechanism that can open the opening 4 by moving the outer nozzle 3 to one end side 3a and close the opening 4 by moving the outer nozzle 3 to the other end side 3b. In other words, the shape, number, and type and configuration of the actuators that are driven by the movement mechanism 10 are not particularly limited. [Explanation of symbols]

[0045] 1 Nozzle device 2 Cylinder 3 Outer nozzle 3a One end side 3b Other end side 4 Openings 5a Nozzle head 9 Filling 10 Moving mechanism

Claims

1. A cylindrical cylinder for supplying a filling material; a cylindrical outer nozzle having at least one end inserted into the cylinder and having an opening on the other end; an inner nozzle accommodated inside the outer nozzle; a nozzle head provided at a tip of the inner nozzle and closing the opening; a moving mechanism that moves the outer nozzle relative to the cylinder and the nozzle head, The opening has an inner tapered surface that expands radially outward toward the tip, The nozzle head has an outer circumferential surface formed with an outer tapered surface that expands radially outward toward the tip, The inner nozzle has a straightening portion having a recess in an outer wall thereof, and the recess extends along an axial direction of the straightening portion to a nozzle head provided at a tip thereof, The nozzle device is characterized in that the moving mechanism opens the opening by moving the outer nozzle toward one end, and closes the opening by moving the outer nozzle toward the other end, causing the inner tapered surface to abut against the outer tapered surface.

2. 2. The nozzle device according to claim 1, wherein the movement mechanism includes a piston portion provided in the outer nozzle, an air chamber provided between the cylinder and the piston portion, and an air actuator that supplies air to the air chamber to move the piston portion.

3. 3. The nozzle device according to claim 2, wherein the movement mechanism has an annular seal portion on an outer circumferential wall of the piston portion, the annular seal portion being in sliding contact with a circumferential wall of the cylinder to seal the air chamber.

4. 4. The nozzle device according to claim 3, wherein the annular seal portion is provided with a pair of lip seal members each having a V-shaped cross section, the lip seal members being open at one end and the other end.

5. 3. The nozzle device according to claim 2, wherein the air chamber has a first air chamber that moves the piston portion toward the nozzle head by supplying air, and a second air chamber that moves the piston portion in a direction away from the nozzle head, and the movement mechanism has a first air passage that communicates with the first air chamber and a second air passage that communicates with the second air chamber, which penetrate the peripheral wall of the cylinder in an inward and outward direction, and has a changeover valve that alternately switches and supplies air from the air actuator to the first air passage or the second air passage.

6. a joint shaft that supports the nozzle head so as to be rotatable in a circumferential direction; 2. The nozzle device according to claim 1, further comprising a knob for rotating the joint shaft.

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