JPS60240620A - Deaerator for bag body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (1) Purpose of the Invention (Industrial Application Field) This invention aims to prevent the quality of the contents from deteriorating when filling and sealing the contents into the bag. This device is used in the field of deaeration, and particularly relates to a device that deaerates air from an upper opening by pressing a suspended bag.

(Prior Art) Conventionally, the above-mentioned degassing device presses the side of the bag containing the contents with a constant set pressure by appropriate means.
Deaeration was performed by raising the contents to the upper open position, and the container was sealed in that state.

In the conventional apparatus described above, it was difficult to set a pressing force that would raise the contents to a position where complete deaeration could be achieved. In other words, due to an error in the filling amount of the contents or a difference in the hanging condition of the bag, even with a certain pressing force, degassing may be incomplete, leaving problems in maintaining the quality of the contents, or the contents may overflow and cause damage to the contents. There are problems such as insufficient quantity and staining of the surroundings of the device. Especially, if the overflowing contents are liquid, it may cause rust to the device and impede its operation. Furthermore, even if there were slight variations in the pressing force, similar problems would occur.

(Problems to be solved by Haimei) The present invention attempts to solve the problems caused by the above-mentioned insufficient or excessive deaeration of conventional devices. Even if there are differences in the content, shape, size, and hanging condition of the bag, and even if there are variations in the pressing force, the bag can be degassed optimally according to each condition. Provide deaeration equipment.

(2) Structure of the Invention (Means for Solving the Problems) The present invention is directed to pressing a bag body suspended with its opening facing upward and containing contents therein with a pressing body. This device is for degassing from an opening in the body, and is equipped with the clamping body as described above.

The clamping body consists of a pair of clamping pieces that clamp the opening of the bag body from both sides over almost the entire width. At least one of the pair of clamping pieces has a deaeration groove extending vertically through the clamping surface for evacuating the air inside while pressing the bag body with a pressing member. Furthermore, a level detection device is attached to the upper part of the deaeration groove, which detects the upper surface level of the contents that gradually rises due to the pressure on the side surface of the bag and issues a signal to stop the pressing operation of the pressing body. It is being

In addition, if the deaeration groove is set so that its cross-sectional area gradually decreases by decreasing its width or depth upward, deaeration will progress and the residual air in the bag will decrease. When this occurs, it is possible to amplify the rate of increase in the upper surface level of the contents, and as a result, the detection of the upper surface level by the level detection device becomes easier, that is, the time of signal generation becomes more accurate, which is preferable. For example, the width of the deaeration groove is widened at the bottom edge of the clamping piece to a position close to both ends of the clamping piece, gradually narrows toward the center of the clamping piece, and then the narrow groove extends upward in a substantially parallel manner. It can be formed so that it reaches the upper edge of the clamping piece as it is.

Examples of level detection devices include, if the bag is made of a translucent material, a photoelectric switch that is activated by blocking light at the top surface level when the contents rise; If the bag does not have one, a capacitive switch may be used which is activated by a change in the capacitance of the bag due to the rise of the contents.

(Function) In the present invention having the above configuration, as the pressing body gradually presses the bag, the upper surface level of the contents inside the bag rises, and the air inside the bag escapes from the degassing groove of the clamping piece. I start to notice it.

When the deaeration progresses and the upper surface level of the contents reaches the position of the level detection device set at the top of the deaeration groove, the level detection device emits a detection signal, and the pressing operation of the pressing body is controlled by this signal. Stop at that position. Sealing is achieved in this state.

When the cross-sectional area of the degassing groove gradually decreases upward, when the upper surface level of the contents rises within the degassing groove, the degree of degassing per unit time remains constant. However, as the level of degassing approaches the completion of degassing, the degree to which the top surface of the contents rises increases, so the level detection device described above can accurately determine when the degassing is complete even when the residual air is minimal. .

(Example) An example of the present invention will be described below based on the accompanying drawings.

The apparatus of this embodiment is schematically shown in FIG.

In the figure, 1 is a bag containing contents and has an opening 11 at the top.

The bag 1 is clamped and suspended by a chuck body 2 having chuck pieces 21 operated by a pneumatic cylinder (not shown) or the like on both upper sides thereof. In addition, at the end of the chuck body 2, there are suction cups 1 and 2, such as suction cups, for expanding the opening 11 in order to initially put the contents into the suspended bag body 2.
2.

A pressing body 3 is disposed below the chuck body 2 to press the bag body from both sides.

The pressing body 3 is constructed by connecting a pressing piece 31 having a contact plane with the bag body 1 and having, for example, an angular shape in cross section as shown in the figure, with a rotating lever 32 that allows the pressing piece 31 to be opened and closed. There is. The rotating lever 32 is set to rotate at a relatively slow speed by a motor (not shown) or the like.

At a position above the chuck body 2, a horizontally long clamping body 4 is arranged to clamp the upper end of the bag body 1, leaving a size for a shield par 5 as a sealing device at the top. The clamping body 4 is a pair of clamping bodies 4 formed symmetrically with respect to the bag body 1.
It consists of 1.41. As clearly shown in FIG. 1(2), the clamping body 41 is provided with a degassing groove 43 tapering upward on its clamping surface 42, and the width of the degassing groove 43 is equal to the width of the clamping piece. At the lower edge of the clamping piece, it widens almost to its full width, pinches toward the center of the clamping piece, and then forms a narrow parallel groove 44 to the upper edge of the clamping piece. The parallel groove portion 4
4 has a long hole 46 drilled therein, and one side 45 of a photoelectric switch serving as a level detection device is attached to this long hole 46. The pair of clamping bodies 4I are formed in the same manner, but in the case of a photoelectric switch, for example, one clamping piece is attached with a light-emitting side element, and the other clamping piece is attached with a light-receiving side element. And the above photoelectric switch uses that signal,
Motor for driving the rotating lever 32 of the pressing body 3 (not shown)
is connected to the motor to stop the motor.

Note that the clamping piece 41 has an arm 4 attached to its back side.
7 etc., to a rotating shaft 48, and the rotating shaft 48 is
A rotary pneumatic cylinder (not shown) or the like is configured to rotate away from the bag 1 when the contents are put into the bag and when the opening is shielded.

In the above embodiment apparatus, the bag 1 is clamped and suspended by the chuck piece 21 of the chuck body 2, the opening is widened by the adsorbent 22, and the contents are poured from above through the opening. , the rotating wheel 48 is operated to clamp the opening of the bag body between the pair of clamping pieces 41 and 41. After that, the rotating lever 32 is activated, and the pressing piece 31 gradually pushes the bag body 1.
(The air inside the bag is discharged to the outside through the degassing groove 43 of the clamping piece, and the upper surface level of the contents starts to rise from the initial position H. (see figure).

When the upper surface level of the contents reaches the parallel groove 44, the air inside the bag has been almost completely evacuated, and the upper surface level of the contents further rises and the photoelectric switch 45 is activated.
When the position H2 is reached, the air has been sufficiently degassed, and at this time the photoelectric switch 45 emits a detection signal. Moreover, at this time, the contents do not overflow to the outside of the bag body 1. The motor of the pressing body 3 is stopped by the detection signal of the photoelectric switch 45, and the pressing piece 3L'
31 maintains its current position.

Thereafter, it is sealed with the shield par 5 or the like, and the series of filling operations is completed.

(3) Effects of the Invention As described above, according to the present invention, the level detection device constantly monitors the upper surface level of the contents, and the pressing body presses the bag body to perform deaeration, and the deaeration is completed completely. In other words, when the level of the top surface of the contents is detected by the level detection device, the pressing is stopped in that state with that signal, regardless of the amount of contents, the bag itself, and the variation in the pressing force. , it can be completely degassed and the contents will not spill out.

As a result, it is possible to seal under optimal conditions, completely preventing deterioration of the quality of the contents of the filled bag, and even if the input amount is kept constant, there will be variations in the amount of filling inside the bag after sealing. This eliminates any problems with the device due to overflowing of the contents, such as rusting of the device when the contents are liquid.

[Brief explanation of the drawing]

The drawings show an apparatus according to an embodiment of the present invention, and FIG.
A perspective view showing the clamping piece in Figure 1, and Figure 2 (1) is a perspective view showing the clamping piece in Figure 1.
A partially broken front view of the device in 1, Figure 2 (2) is +1
FIG. 1 is a sectional view taken along line A-A in FIG. l...Bag body 11...Opening 3...Press body 4...Press body 41. ...... Clipping piece 43 ... Deaeration groove 44 ... Parallel groove portion 45 ... Level detection device patent Applicant Kureha Chemical Industry Co., Ltd. Representative Patent Attorney Toru Fujioka

Claims (1)

[Scope of Claims] (11) An apparatus for deaerating a bag from the opening of the bag by pressing a bag with contents stored therein with a pressing member that is suspended with the opening facing upward, It is equipped with a clamping body consisting of a pair of clamping pieces that clamps the opening of the bag from both sides over almost the entire width, and at least one clamping piece has a clamping body for degassing when the bag is pressed. It has a deaeration groove that penetrates vertically on the surface,
A bag degassing device characterized in that a level detection device is installed above the degassing groove to detect the upper surface level of the contents and to issue a signal to stop the pressing operation of the pressing body. (2) The bag deaerator according to claim (1), wherein the cross-sectional area of the deaeration groove decreases upward. (3) The deaeration groove has a width that reaches near both ends of the clamping piece at the bottom edge of the clamping piece, gradually narrows toward the center of the clamping piece, and then The bag is formed with a narrow parallel groove up to the upper edge, and a level detection device is provided in the parallel groove, according to claim 1) or 2). Device. (4) The bag according to claim 11 or (3), wherein the level detection device is a photoelectric switch that detects the upper surface level of the contents inside the translucent bag. (5) The level detection device is a capacitive switch,
The bag deaeration device described in section 3).