JP2006282280A - Rotary type filling valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary type filling valve capable of filling liquid or semi-liquid food containing solids into a container by a predetermined amount without any dripping. <P>SOLUTION: The rotary type filling valve comprises a casing 34 to constitute a valve chamber 41 having a circular section with an inlet 45 and an outlet 46 at the positions facing each other in the radial direction, a rotating body 37 which is arranged rotatably along an inner circumference of the valve chamber of the casing to constitute a cylinder chamber 35 simultaneously communicated with the inlet and the outlet, a turning means to turn the rotating body by about 180° so that the cylinder chamber is communicated with the inlet and the outlet, and a shuttle type piston 36 which is arranged in the cylinder chamber and reciprocal in the cylinder chamber in the axial direction of the cylinder chamber. The rotary type filling valve is constituted as a one in which a recessed part 39 is formed on both end faces of the piston. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rotary-type filling device used for filling a container with a liquid such as a high-viscosity liquid or a food-like liquid mixed with solids such as pulp, or a semi-liquid material, in particular a rotary type. The present invention relates to a rotary mold filling valve mounted on a mold filling apparatus.

  2. Description of the Related Art Conventionally, a rotary filling valve for filling a container with a liquid or a semi-liquid material by a certain amount is known. The rotary filling valve includes a casing that forms a valve chamber having an inlet and an outlet, a rotating body that is rotatably arranged along the inner periphery of the valve chamber of the casing, and that forms a cylinder chamber. And rotating means for rotating. And the rotary type | mold filling valve which made the both end surfaces of the shuttle type piston arrange | positioned in a cylinder chamber into a curved surface according to the outer peripheral surface shape of a rotary body is proposed (for example, refer patent document 1).

Moreover, in order to blow off the liquid, solid matter, etc. adhering to the vicinity of the outlet of the casing, a filling device provided with an air outlet facing the outlet has been proposed (for example, Patent Document 2).
Patent No. 3030492 JP-A-9-323705

  In the rotary filling valve according to Patent Document 1, when filling liquid food or the like, a filling such as liquid adheres to the end face of the piston on the casing outlet side (FIG. 3A). Then, when the rotating body 37 is rotated with the filler adhering to the end face of the piston (FIG. 3B), the filler adhering to the end face of the piston is scraped off by the inner wall surface at the outlet peripheral edge of the casing 34 and falls. A dripping phenomenon occurs. In addition, when the filling is a liquid such as a high-viscosity liquid or a food mixed with pulp or other solid matter, a considerable amount of deposits scraped off by the inner wall surface of the casing are accumulated on the inner wall surface of the casing and then drop at once. . When such a filling valve is used in a filling and packaging machine equipped with an integrated process such as filling, covering, and sealing a container that is being conveyed by a conveyor, droplets caused by dripping may cause a drop in the sealing surface of the container. This causes a problem that the sealing surface becomes dirty and causes a sealing failure. In addition, when a considerable amount of dripping occurs, the quantitative accuracy is impaired.

  Further, the filling device according to Patent Document 2 has a problem that the structure of the device becomes complicated because it is necessary to provide a separate compressor.

  Therefore, in the present invention, the device is filled with liquid food or the like that can prevent dripping of the container and poor sealing by preventing the liquid from leaking without making the apparatus complicated, and improving the quantitative accuracy and hygiene. It is an object of the present invention to provide a rotary type filling valve, particularly a rotary type filling valve mounted on the rotary type filling device.

  The present inventors have intensively studied to solve the above problems, and in the invention according to claim 1, a casing constituting a valve chamber having a circular cross section having an inlet and an outlet at positions facing each other in the radial direction. A rotating body that is disposed rotatably along the inner periphery of the valve chamber of the casing and that constitutes a cylinder chamber that can communicate with the inlet and the outlet at the same time, and the rotating body is configured so that the cylinder chamber communicates with the inlet and the outlet. In a rotary filling valve comprising a rotating means for rotating by 180 degrees and a shuttle type piston arranged in a cylinder chamber and reciprocating in the axial direction of the cylinder chamber, recesses are formed on both end faces of the piston. It is configured as a rotary type filling valve.

  In the invention which concerns on Claim 2, it comprised as a rotary type | mold filling valve from which a recessed part consists of a plane.

  If the rotary type filling valve of the present invention is used, dripping can be prevented without making the apparatus complicated. For this reason, it is possible to prevent the container from being soiled and to have poor sealing, and to improve quantitative accuracy and hygiene.

  As the rotary filling valve of the present invention, a casing constituting a valve chamber having a circular cross section provided with an inlet and an outlet at positions opposed to each other in the radial direction, and rotatable along the inner periphery of the valve chamber of the casing. Disposed in the cylinder chamber, and a rotating body that constitutes a cylinder chamber that can communicate with the inlet and the outlet at the same time, a rotating means that rotates the rotating body approximately 180 degrees so that the cylinder chamber communicates with the inlet and the outlet, In this rotary type filling valve composed of a shuttle type piston that can reciprocate in the cylinder chamber in the axial direction of the cylinder chamber, the rotary type filling valve is not particularly limited as long as it has recesses formed on both end faces of the piston. is not.

  The casing is not particularly limited as long as it forms a valve chamber with a circular cross section having an inlet and an outlet at positions facing each other in the radial direction of the casing. Although it is not particularly limited as long as it can communicate with the chamber, since the cylinder chamber communicates, it is preferable that the inlet and the outlet are located at positions where the diameters of the casings face each other. The shapes of the inlet and the outlet are not limited, but are preferably circular from the viewpoint of ease of processing, ease of cleaning, and the like. Since the inlet is connected to another pipe by a clamp to form a production line for foods and the like, it can be formed into a cylindrical shape, which protrudes from the casing and has a flange. The outlet can also be cylindrical, projecting from the casing and provided with a flange. The sizes of the inlet and outlet openings are not particularly limited, but it is preferable to make the opening diameter of the outlet smaller than the diameter of the cylinder chamber because the shuttle type piston can be prevented from protruding from the cylinder chamber.

  The rotating body is not particularly limited as long as it constitutes a cylinder chamber that can be rotated along the inner periphery of the valve chamber of the casing and can communicate with the inlet and the outlet at the same time. From the viewpoint of ease of manufacture and assembly, it is usually preferable to be cylindrical. The material of the rotating body is not particularly limited, but from the viewpoint of handling foods and the like, it is preferably washable and excellent in acid resistance, and stainless steel, Teflon (registered trademark) and the like are preferable. Further, the size is not limited, and the size can be increased or decreased depending on the food to be filled.

  The cylinder chamber is not particularly limited as long as it can communicate with the inlet and the outlet at the same time, and the cross-sectional shape may be elliptical, circular, or polygonal. Since it is preferable that the shuttle type piston slide and reciprocate in the cylinder chamber, the cross-sectional shape thereof is preferably elliptical or circular. This reduces the contact surface between the piston and the cylinder chamber, allows the piston to slide smoothly and reciprocates, and reduces the amount of liquid food that enters the gap between the cylinder chamber and the shuttle-type piston. Will improve. In addition, the cross-sectional shape of the cylinder chamber can be circular, and a notch can be provided in a part of the cylinder chamber to prevent the piston from rotating relative to the cylinder chamber, thereby enabling smooth operation.

  The shuttle-type piston is not particularly limited as long as both end surfaces thereof, that is, surfaces facing the inlet and outlet of the cylinder chamber of the piston form recesses and can reciprocate in the cylinder chamber. The cross-sectional shape of the shuttle type piston can be exemplified by an ellipse, a circle and a polygon. In order to increase the filling accuracy, it is preferable that the cylinder is inscribed in the cylinder chamber and slides in the cylinder chamber, so that the cross-sectional shape is preferably an ellipse or a circle. Moreover, the cross-sectional shape of a cylinder chamber can be made circular, and a notch part can also be provided in a part. The material of the shuttle type piston is not particularly limited, but a soft elastic material is preferable from the viewpoint of ensuring adhesion with the cylinder chamber. Examples of the soft elastic material include nylon, Teflon (registered trademark), plastic, and the like, and nylon and Teflon (registered trademark) are more preferable. Further, both end surfaces of the shuttle type piston, that is, at least the outer peripheral edge of the surface facing the inlet and outlet of the cylinder chamber, are formed by circular arc surfaces having the same radius as the rotating body so as to be able to rotate while slidingly contacting the inner periphery of the valve chamber. In addition, it is preferable that a recess is formed on the inner side in that the piston can slide smoothly in the valve chamber together with the rotating body.

  It is preferable that the bottom of the concave portion is a flat surface in order to reduce the adhesion surface of food or the like. Furthermore, it is preferable that this recessed part is formed in the cylindrical hole which has a bottom part which consists of a circular plane. In addition, the concave portion can be mirror-finished in order to reduce adhesion of food or the like. Since the recesses are provided on the both end faces of the piston in this way, liquid food or the like can be held in the recess until the next filling cycle by surface tension, and the liquid food or the like collects on a part of the end face toward the piston outlet. Can be prevented. For this reason, liquid food or the like does not fall on the sealing surface of the container, and the container can be prevented from being dirty or defective. In addition, since liquid food or food containing solids can be held in this recess, food attached to the end face toward the piston outlet, for example, high-viscosity liquid food or food containing solids, etc. It can also be prevented from being scraped off at the periphery. Therefore, since the concave portions are provided on both end faces of the piston, so-called that food attached to the periphery of the piston end face or outlet falls without providing a complicated device for blowing off food attached to the vicinity of the outlet. It is possible to prevent dripping, thereby preventing the container from becoming dirty and sealing failure, and improving the quantitative accuracy and hygiene.

  The rotating means is not particularly limited as long as the rotating body can be rotated approximately 180 degrees so that the cylinder chamber communicates with the inlet and the outlet, but one end of the cylinder chamber is connected to the inlet and the outlet of the valve chamber. And the other end communicate with each other alternately, and examples thereof include an air actuator, an electric actuator, and a servo motor. From the viewpoint of obtaining high filling accuracy, it is preferable to use a servo motor. In order to provide versatility, it is also possible to provide a shaft on the rotating body so that it can be connected to these power sources, and to provide a connecting portion that can be connected to the drive unit at the end of the shaft.

  Hereinafter, a rotary filling valve according to an embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited thereto. FIG. 1 is a longitudinal sectional view of a rotary filling valve according to an embodiment of the present invention. FIG. 2 is a vertical cross-sectional view taken along the line A-A ′ of FIG. 1. 3 (a) and 3 (b) are explanatory views of the filling operation of the conventional rotary filling valve, and FIGS. 3 (c) and 3 (d) are the filling of the rotary filling valve according to one embodiment of the present invention. It is operation | movement explanatory drawing. FIG. 4 is a perspective view of a piston according to an embodiment of the present invention. FIG. 5A is a plan view of a piston according to one embodiment of the present invention, and FIG. 5B is a longitudinal sectional view of the piston according to one embodiment of the present invention.

  As shown in FIGS. 1 and 2, the rotating body 37 has a cylinder chamber 35 penetrating in the radial direction. A shuttle type piston 36 is contained in the cylinder chamber 35, and can be reciprocated in the axial direction of the cylinder chamber 35 by the rotational movement of the rotating body 37. The rotating body 37 is disposed so as to rotate while being in sliding contact with the inner periphery of the valve chamber 41 corresponding to the inner periphery of the casing 34, and the cylinder chamber 35 penetrating the rotating body 37 in the radial direction is approximately 180 degrees. Each time it rotates, it is in a position to communicate with the inlet 45 and outlet 46 of the casing 34 simultaneously. When the cylinder chamber 35 communicates with the outlet 46 of the casing 34, the end edge on the outlet 46 side slightly covers the cylinder chamber 35, and the portion 10 (see FIG. 2) covering the cylinder chamber 35 is the outlet of the piston 36. It is a stopper that prevents protrusion to the 46 side. The cylinder chamber 35 has a long hole-like cross section, and the piston 36 fitted in the cylinder chamber 35 has the same shape. This shape serves as a rotation restricting means for preventing the relative rotation of the piston 36 in the cylinder chamber 35. Yes.

  As shown in FIG. 1, the piston 36 rotates so that at least the outer peripheral edges of the surfaces facing the inlet 45 and the outlet 46 of the cylinder chamber 35, which are both end faces, can rotate while slidingly contacting the inner periphery of the valve chamber 41. A circular arc surface having the same radius as the body 37 is formed, and a concave portion 39 is formed inside thereof. As shown in detail in FIGS. 4 and 5, the recess 39 is formed in a cylindrical hole having a bottom portion formed of a circular plane.

  First, based on FIG.3 (c) and (d), the filling operation | movement of the rotary type | mold filling valve which concerns on one Example of this invention is demonstrated. (1) The filling liquid in the filling tank 51 (refer to FIG. 1) is discharged from the cylinder chamber 35 by the piston 36 by its own weight, or by pressurized air in the filling tank generated by its own weight and air supplied from an air supply port (not shown). By descending to the 46 side, it flows into the cylinder chamber 35. (2) A servo motor (not shown) is driven to rotate the rotating body 37 approximately 180 degrees, and the rotating body 37 stops at a position where one end of the cylinder chamber 35 communicates with the inlet 45. (3) The piston 36 is lowered again to the outlet 46 side by its own weight or its own weight and pressurized air in the filling tank. At that time, the filling liquid previously entered in the cylinder chamber 35 is pushed out from the outlet 46 and is shown in the figure. The container which is not filled is filled (FIG. 3C). (4) The servo motor is driven again, the rotating body 37 rotates approximately 180 degrees, and the rotating body 37 stops at a position where the other end of the cylinder chamber 35 communicates with the inlet 45. This completes one filling operation. Hereinafter, by appropriately repeating the operations (1) to (4), it is possible to sequentially fill the new container with the filling liquid. The timing of the rotating body 37 can be freely set by changing the control of the servo motor. Here, FIG.3 (c) shows the operation | movement of said (3). FIG. 3D shows a process from the operation (3) to the operation (4).

  As shown in FIGS. 3C and 3D, in the rotary type filling valve according to one embodiment of the present invention, surfaces facing the inlet 45 and the outlet 46 of the cylinder chamber 35 which are both end surfaces of the shuttle type piston 36. In addition, a recess 39 is formed. The recess 39 is configured to hold a liquid food or the like by surface tension. Therefore, in the state of FIG. 3C, the filling material adhering to the recess 39 is not scraped off and dropped by the inner wall surface of the periphery of the outlet 46 of the casing 34, and liquid food or the like does not fall on the outlet 46 of the piston 36. It is difficult to collect at a part of the end face that faces, and liquid food or the like does not drop into the sealing surface of the container. And since liquid food etc. are hold | maintained at the recessed part 39 until the next filling cycle, liquid food etc. do not scatter outside a rotary type | mold filling valve.

  As shown in FIGS. 4 and 5, the shuttle-type piston 36 has recesses 39 formed on the surfaces facing the inlet 45 and outlet 46 of the cylinder chamber 35, which are both end faces.

It is a longitudinal cross-sectional view of the rotary type filling valve which concerns on one Example of this invention. It is A-A 'longitudinal cross-sectional view of FIG. It is a longitudinal cross-sectional view of the rotary type filling valve which concerns on one Example of this invention. (A), (b) is explanatory drawing of filling operation of the conventional rotary type | mold filling valve, (c), (d) is filling operation explanatory drawing of the rotary type | mold filling valve which concerns on one Example of this invention. is there. It is a perspective view of the piston which concerns on one Example of this invention. (A) is a top view of the piston which concerns on one Example of this invention, (b) is a longitudinal cross-sectional view of the piston which concerns on one Example of this invention.

Explanation of symbols

34 Casing 35 Cylinder chamber 36 Piston 37 Rotating body 39 Recessed portion 41 Valve chamber 45 Inlet 46 Outlet

Claims (2)

A casing constituting a valve chamber having a circular cross section provided with an inlet and an outlet at positions opposed to each other in the radial direction;
A rotating body that is rotatably arranged along the inner periphery of the valve chamber of the casing and that constitutes a cylinder chamber that can communicate with the inlet and the outlet at the same time;
Rotating means for rotating the rotating body by approximately 180 degrees so that the cylinder chamber communicates with the inlet and the outlet;
In a rotary filling valve that is disposed in the cylinder chamber and includes a shuttle-type piston that can reciprocate in the axial direction of the cylinder chamber.
A rotary filling valve, wherein concave portions are formed on both end faces of the piston.   2. The rotary filling valve according to claim 1, wherein the recess is a flat surface.