JP3112239U - Vacuum line pipe joints in vacuum packaging machines - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate opening and closing movement of each lid member by using a hose to connect a rotary valve at the center of a rotary vacuum packaging machine and a surrounding pressure resistant chamber of the rotary valve with a hose. However, since the internal volume of the hose is large and the air suction efficiency is reduced, and the hose contracts according to the differential pressure, it is difficult to forcibly exclude oxygen molecules adhering to the pipe.
A rigid straight pipe 40 rotatably connected to a branch pot 45 under a rotary valve and a rigid straight pipe 35 fixed to a pressure-resistant chamber cover 16 are overlapped in a telescopic manner to reduce the pipe volume. By making the arm 15 rotation track 28 having the pivot point 18 as an axis and the rotation track 32 of the lid member 16 having the branch pot 45 as an axis non-parallel, the overlap portions of the two straight pipes 35 and 40 can be obtained. The entire tube expands and contracts by sliding on a straight track.
[Selection] Figure 1

Description

  The present invention relates to a pressure-resistant chamber for packaging in a rotary vacuum packaging machine, and a pipe joint for applying a vacuum to the pressure-resistant chamber.

  In the vertical axis rotor type vacuum packaging machine, while revolving a large number of surface plates at equal intervals in a circular orbit centered on the vertical axis, a lid material is arranged on the upper area of each surface plate, Some surface plates and lid members constitute a predetermined number of pressure-resistant chambers. That is, each of the pressure-resistant chambers forms a vacuum environment around the opened package disposed inside during one revolution of the circular orbit, and after sealing the bag mouth of each package in this vacuum environment, Simultaneously with the opening of the lids, the completely sealed package is sequentially removed out of the chamber.

  Therefore, as shown in the following Patent Document 1, a rotary valve arranged at the center of the circular orbit and each lid member around the rotary valve are connected by a hose, and the bending characteristic of the hose is utilized. Although the opening and closing movement of each lid is facilitated, the flexible parabolic hose has a large internal volume, so it takes time to suck air, and this kind of hose with elastic characteristics has a differential pressure. When this occurs, there is a disadvantage that it is difficult to forcibly exclude oxygen molecules adhering to the pipe because it has a property of contracting in accordance with the differential pressure. In addition, there is a problem in that the lubricant in the rotary valve is atomized and drawn out in the direction of the hose by evacuating the pressure-resistant chamber, and contaminates the inner surface of the high area hose.

JP 63-02005 A

  In the present invention, a pressure-resistant chamber is formed by a large number of surface plates arranged in a circular track around the rotary valve on the vertical axis and a lid material on the upper area of each surface plate, and on the upper surface of the rotor rotating along the vertical axis. The vacuum packaging machine is a type of vacuum packaging machine that supports each of the lid members at multiple ends of a radial arm pivotally supported at one end and opens and closes each lid member on a surface plate by rotation of each arm around the pivot point. A rigid L-shaped tube rotatably supported on the side surface of the branch pot protruding from the same number of ports as the pressure-resistant chambers in the rotary valve, and connected to the open end of the L-shaped tube, and the lid A rigid straight pipe protruding from the material is configured to overlap in a stretchable manner on a straight track.

  The straight pipe connected to the open end of the L-shaped pipe forms a ring groove around the boundary portion with the branch pot, and a retaining fitting for inserting one end into the ring groove, The rigid straight pipe that is fixed to the branch pot with a screw and protrudes from the lid material forms a ring groove around the boundary with the lid material, and has one end inserted into the ring groove. A stopper is fixed to the lid member with a screw.

  A radial arm that supports each lid member and a straight pipe that connects each lid member to a rotary valve are in parallel, and when the lid member is opened and closed by the arm, the pivot point of the arm and the straight pipe The straight pipe is forcibly contracted on a straight track by the deviation from the pivot point to allow air flow inside. The straight pipe, which is always linear, has a conventional flexible hose with an internal volume. Therefore, vacuuming of each pressure-resistant chamber is efficient. Moreover, the two straight pipes which overlap are easily disassembled from the rotary valve and the cover material by returning the screws, so that the hygiene management of the vacuum packaging machine whose main purpose is food packaging can be achieved.

  FIG. 2 is a plan view of the apparatus. An endless chain 13 is arranged around two large and small gears 11 and 12 installed at equal intervals, and a surface plate 14 supported at equal intervals on the endless chain 13 is provided with the gears. It is transported along an endless track with 11 rotational power. The gear 11 forms a so-called rotor, and the eight arms 15 projecting radially from the periphery of the longitudinal axis 17 at the center of the rotor 11 respectively suspend the lid member 16, and withstand pressure by the lid member 16 and the surface plate 14. The chamber 20 is configured.

  In FIG. 3 showing the side surface of the large gear portion, a surface plate 14 supported by an endless chain 13 that engages with the rotor 11 and constituting the pressure-resistant chamber 20, and an arm having the upper surface of the rotor 11 as a pivot point 18. 15 shows a cover member 16 supported. In FIG. 2, the lid 16 rotates around the rotor 11 in a circular orbit, and the respective lid members are in a vacuum environment in a pressure-resistant chamber 20 formed in conformity with the surface plate 14 that rotates in an elliptical orbit. Since the technology for vacuum packaging the article to be packaged contained in the sachet is a publicly known matter, details are omitted.

  The rod 21 slidably supported on the auxiliary bearing 19 of the rotor 11 in FIG. 3 receives the bulging resistance of the rail 22 by the rotation of the rotor 11, so that the arm 15 and the lid member 16 pivot on the pivot point 18. Move up and down. The two suction pipes 25 and 26 connected to the two vacuum pumps are connected to the upper fixed plate of the rotary valve 27, and the movable plate 31 rotating below the fixed plate is connected to the eight pressure-resistant chambers 20. The eight ports in the movable platen 31 and the lid members 16 are connected to each other via a rigid straight pipe 40, respectively.

  As shown in FIG. 4, the eight ports 33 in the movable platen 31 are provided with branch pots 45 on the lower side, and as shown in FIG. The tube 41 is rotatably supported, and the rigid straight tube 40 is provided following the L-shaped tube 41.

  In FIG. 6, the open end of the rigid straight pipe 40 connected to the L-shaped pipe 41 is overlapped around a separate rigid straight pipe 35 protruding horizontally from the side surface of the lid member 16 via a sealing material. In this case, as shown in FIG. 1, the arm 15 suspends the lid member 16 via a pin 29, a rotary track 28 having the multi-end pivot point 18 as an axis, and a lid having the branch pot 45 as an axis. By making the rotary track 32 of the material 16 non-parallel, the overlap portions of the two straight pipes 35 and 40 slide and the whole pipe expands and contracts. The reason why the rigid straight pipe 40 is cut and the flexible pipe 46 is interposed therebetween is that the two rigid pipes 35 and 40 can be easily slid by the soft cushion action of the flexible pipe 46. It is to do. However, since the tube 40 is free to rotate and the flexible tube 46 is configured to be short at the branch pot 45, the tube 40 is not greatly bent.

  As shown in FIG. 5, a groove 42 is formed around the L-shaped pipe 41 at the boundary with the branch pot 45, and a retaining metal fitting 43 to be inserted into the ring groove 42 is attached to the branch pot 45 with a screw 44. Fix it detachably. Further, as shown in FIG. 7, a groove 48 is formed around the straight pipe 35 at the boundary with the lid member 16, and a retaining metal fitting 49 to be inserted into the annular groove 48 is attached to the lid member 16 with a screw 50. Fix it detachably. Each configuration described above facilitates cleaning of the lubricant transferred from the rotary valve attached to the inner surface of the straight pipe.

Cross section of piping overlap Top view of rotary vacuum packaging machine Partial side view of the previous figure Illustration of connecting straight pipe to branch pot Bottom view of previous figure Cross section of piping overlap Partial enlarged view of the previous figure

Explanation of symbols

11 ... Rotor 14 ... Plate 15 ... Arm 16 ... Lid 17 ... Vertical axis 20 ... Pressure chamber 31 ... Movable plate 35 ... Rigid straight pipe 40 ... Rigid straight pipe 41 ... L-shaped pipe 43 ... Fastener 45 ... Branch pot 46 ... Flexible tube 47 ... Stopper fitting

Claims (4)

  A pressure-resistant chamber is formed by a number of surface plates arranged on a circular track around the vertical axis rotary valve and a lid material on the upper surface of each surface plate, and one end is pivotally supported on the upper surface of the rotor rotating along the vertical axis. A vacuum packaging machine of a type that supports each lid member at the other end of the radial arm and opens and closes each lid member on the surface plate by rotation of each arm around the pivot point, A rigid L-shaped tube is rotatably supported on the side surface of the branch pot protruding from the same number of ports as the pressure chambers in the rotary valve, and a straight tube connected to the open end of the L-shaped tube, and protruding from the lid member. A device in which a rigid straight pipe is stretched and overlapped on a straight track.   The straight pipe connected to the open end of the L-shaped pipe forms a ring groove around the boundary with the branch pot, and a retaining fitting for inserting one end of the ring groove into the branch pot. 2. The device according to claim 1, wherein the device is fixed in place.   The rigid straight tube protruding from the cover material forms a ring groove around the boundary with the cover material, and has a stopper fitting for inserting one end into the ring groove with a screw in the cover material. The device according to claim 1, which is fixed. The straight pipe connected to the open end of the L-shaped pipe is a device according to claim 1, wherein a part of the straight pipe is constituted by a flexible pipe.