JPH047050Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device that controls the attitude of a bag to rotate it to a position suitable for sealing when sealing the valve opening of a bag that is filled with powder or granules through the valve opening at the bottom. It is.

BACKGROUND ART Currently, bags having a filling valve at the bottom of the bag and a flap of the valve opening heat-sealed to the bottom of the bag are widely used as bags for filling powder or granular materials such as wheat flour. When continuously heat-sealing the bottom valve opening of this type of bag, it is necessary to control the position so that the bag is rotated to a position suitable for sealing with a heat sealer disposed on one side of the conveyor. Conventionally, a speed differential conveyor having a high speed section and a low speed section has been used to turn the bags, but even if the speed difference is adjusted, this alone causes variations in posture and does not allow accurate posture control. Therefore, it was not possible to make fine adjustments to the proper position for the seal.

Therefore, the present invention provides a bag body posture control device that is configured to use the above-mentioned speed differential conveyor to control the posture of the bag so that it can be rotated to an appropriate sealing position in the heat sealing section of the next process. This is what I am trying to do.

According to the present invention, when sealing the valve port at the bottom of the bag after filling the powder or granular material through the valve port at the bottom of the bag, the posture of the bag is controlled so as to rotate to a position suitable for sealing. The apparatus is configured to transport the bag filled with powder or granular material, which is supplied from a supplying means with the longitudinal axis of the bag substantially coincident with the transport direction of the bag, at a predetermined rate by a difference in transport speed. A speed difference conveyor having a high speed conveyor part and a low speed conveyor part for turning the turning angle, and a speed difference conveyor disposed near the end in the transfer direction of the low speed conveyor part of the speed difference conveyor, and bringing the bag into rolling contact with the bottom of the bag. At the same time, the longitudinal axis of the bag is rotated by the speed difference conveyor with respect to the transport direction.
The above object can be achieved by including an arcuate turn guide having a radius approximately equal to the width of the low-speed conveyor section for turning to a predetermined angle smaller than 90°.

Here, it is preferable that the predetermined angle is 5 to 30 degrees.

Further, it is preferable that the width of the low-speed conveyor section is smaller than the width of the high-speed conveyor section.

Hereinafter, the bag posture control device of the present invention will be described in detail with reference to the accompanying drawings.

The bag body 1 used in the device of the present invention has a valve port 2 for filling powder or granular material at the lower bottom, and this valve port is connected to the flap 3.
This type seals the bottom part by heating. These types of bags come in various sizes, and the device of the present invention is configured to be adaptable to bags of different sizes.

As shown in FIG. 2, the bag body 1 is supplied from a supply conveyor 4 after being filled with powder or granules such as wheat flour.
It is rotated by a predetermined angle by the posture control device 5 of the present invention and enters the sealing machine 6 to seal the valve opening at the bottom. Heat sealers are generally used for sealing machines,
The bag body whose posture has been appropriately controlled by the posture control device 5 of the present invention is guided by a guide 8 on a roller conveyor 7, and the flap 3 is pressed against the bottom of the bag body 1 by a heater 9 and sealed.

At this time, in order to apply a slight pressure to the bottom of the bag 1 and press it against the heater 9 installed parallel to the direction of travel of the supply conveyor, the posture of the bag 1 must be
The longitudinal axis of the bag body 1 is
It has been found that it is preferable to be inclined by a predetermined angle smaller than 90°. This preferred predetermined inclination angle range is as shown in FIG.
This is the case when the angle α formed by the longitudinal axis 11 of the bag with respect to the direction perpendicular to the transport direction indicated by arrow 10 is between 5° and 30°.

In order to perform posture control by turning as described above, the device of the present invention has a high-speed conveyor section 12 composed of roller conveyors each having a different transfer speed.
and a speed differential conveyor 14 having a low-speed conveyor section 13, and an arc-shaped turn guide 15 disposed near the end of the low-speed conveyor section 13 in the transfer direction and having a radius approximately equal to the width of the low-speed conveyor section 13. This turn guide 15 is a speed difference conveyor 14
The bag body 1 which has been rotated by a predetermined rotation angle is further rotated from that angle until the longitudinal axis 11 of the bag body 1 is at a predetermined angle with respect to the transport direction 10 by a predetermined angle, preferably an angle smaller than the above angle α, that is, 5 to 30 degrees. , to rotate the bag while rolling the bottom of the bag into contact with each other.

Now, as shown in FIG. 2, if the bag 1 is fed from the supply conveyor 4 to the attitude control device 5 of the present invention with its longitudinal axis 11 substantially aligned with the transport direction 10, the bag 1 will be Speed difference conveyor 14
High-speed conveyor section 12 and low-speed conveyor section 13
Due to the speed difference, the bag body is rotated at a predetermined rotation angle on the speed difference conveyor 14 until it contacts the turn guide ₁₅ as shown in A and B in FIG. 1 comes into contact with the turn guide 15 at its lower bottom (valve port 2 side), the lower bottom of the bag 1 is held down by the turn guide 15, and the upper part of the bag 1 is moved by the high-speed conveyor section 12. The bag 1 rolls on the turn guide 15 while rolling and contacting the arcuate turn guide 15 with its lower bottom portion without slipping (the angle at which it rolls and turns on the turn guide 15 is θ ₂ ). , approximately 90° (θ ₁
+θ ₂ ≦90°) Change direction. When the orientation of the bag 1, that is, the longitudinal axis changes by approximately 90°, the lower bottom of the bag 1 touches the end of the arc of the turn guide 15.
The end of this arc is in the transfer direction 1 of the speed difference conveyor 14.
Since it can be regarded as having the same orientation as 0, bag body 1
The lower bottom of the bag is oriented substantially parallel to the end of the turn guide 15, and the entire bag 1 is transferred onto the high-speed conveyor section 12. Therefore, bag body 1 remains almost as it is.
It moves away from the turn guide 15 in a 90° turned position and moves onto the roller conveyor 7. For this reason, the width of the high-speed conveyor section 13 (the length in the direction orthogonal to the transfer direction 10) is preferably larger than the width of the low-speed conveyor section 12.

By the way, the end position of the arc-shaped turn guide 15 is different from that of the high-speed conveyor section 12 and the low-speed conveyor section 13.
If the turn guide 15 is provided slightly on the side of the low-speed conveyor section 13 from the boundary of can be transferred from the speed differential conveyor 14 to the roller conveyor 7.

In this way, by using the arc-shaped turn guide 15, the position of the turn guide 15 and the low speed conveyor section 1 are adjusted.
3, the rotation angle (θ ₁ +θ ₂ ) of the bag 1 from the transport direction 10, and therefore the angle between the direction perpendicular to the transport direction 10 and the longitudinal axis of the bag 1, i.e. , the inclination angle α of bag 1 (=90°
−(θ ₁ +θ ₂ )) can be selected.

That is, in order for the bag body 1 to be turned as described above by the device 5 of the present invention, the speed difference and the length of the high speed conveyor section 12 and the low speed conveyor section 13 of the speed difference conveyor 14 used, and the length of the turn guide 15 are required. If the arrangement position and curved shape are appropriately selected, appropriate turning angles θ ₁ and θ ₂ can be obtained, and the inclination angle α of the bag 1 can be set in a suitable range of 0 to 30°. The seals are in satisfactory condition.

By the way, in the device of the present invention having such a configuration,
Flour filling bag body at high speed section 80m/min, low speed section 50m/min
When using a conveyor with a speed difference of m/min and placing a turn guide with a radius of 240 mm at a distance of 1300 mm from the low speed section as shown, the inclination angle α of the bag is approximately 15°.
and operated extremely well.

[Brief explanation of the drawing]

Fig. 1 is a partial perspective view of a bag body used in the device of the present invention, Fig. 2 is a diagrammatic plan view of a bag body sealing device whose posture is controlled by the posture control device of the present invention, and Fig. 3 is a partial perspective view of a bag body used in the device of the present invention. FIG. 4 is a diagram showing the bag body in a state of being rotated at an angle. FIG. 4 is a diagram showing the relationship between the rotation angle and the inclination angle of the bag body according to the device of the present invention. Explanation of symbols, 1...Bag body, 2...Valve mouth, 3...
Flap, 4... Supply conveyor, 5... Bag posture control device of the present invention, 6... Sealing machine, 7... Roller conveyor, 8... Guide, 9... Heater, 10
... Transfer direction, 11 ... Axis of the bag body, 12 ... High speed section, 13 ... Low speed section, 14 ... Speed difference conveyor,
15...Turn guide.

Claims (1)

[Claims for Utility Model Registration] (1) After filling the powder or granular material through the valve opening at the bottom of the bag, when sealing the valve opening at the bottom of the bag, the bag is turned to a position suitable for sealing. This device controls the posture of the bag filled with powder and granular material, which is supplied from the supplying means so that the longitudinal axis of the bag substantially coincides with the transport direction of the bag. A speed differential conveyor having a high speed conveyor section and a low speed conveyor section for rotating a predetermined rotation angle by a transfer speed difference; and a speed differential conveyor disposed near the end in the transfer direction of the low speed conveyor section of the speed differential conveyor, Approximately the width of the low-speed conveyor section so that the longitudinal axis of the bag is rotated by a predetermined angle smaller than 90° with respect to the transport direction from the angle at which the bag was rotated by the speed difference conveyor while the bottom portions are in contact with each other. A bag body attitude control device comprising: an arc-shaped turn guide having a radius equal to . (2) The bag posture control device according to claim 1, wherein the predetermined angle is 5 to 30 degrees. (3) The bag posture control device according to claim 1, wherein the width of the low-speed conveyor section is smaller than the width of the high-speed conveyor section.