JP7368836B2 - Hopper arrangement structure of bag making, filling and packaging machine - Google Patents

Description

The present invention relates to a hopper arrangement structure for a bag making, filling and packaging machine.

The bag-forming-fill-sealing machine includes a former, a filling tube, a film supply mechanism, a film feeding mechanism, a vertical joint, a horizontal joint, and the like in a frame.
The frame has a top plate, and a hopper at the top of the filling cylinder is located on the top plate, and products measured by a weighing machine are intermittently fed into the hopper.
Therefore, pieces of the product and dust when the product is put into the hopper fall onto the top plate.
Therefore, once a certain amount of product fragments and dust has accumulated, the top plate is cleaned using an air gun.
On the other hand, in this type of bag-forming-fill-sealing machine, the structure in which the hopper is installed on the top plate is such that the cylindrical part continuing from the bottom of the hopper is inserted into a hole formed in the top plate. (See FIG. 8A of Japanese Patent Application Laid-open No. 2010-105740).

Japanese Patent Application Publication No. 2010-105740

Therefore, when cleaning the top plate with an air gun, product fragments and dust fall to the bottom of the top plate from the annular gap between the inner circumferential surface of the hole in the top plate and the outer circumferential surface of the cylindrical part, causing a film to form. There were problems such as adhesion to the film transport mechanism, sliding parts of vertical joints, and horizontal joints, and some kind of improvement was required.
The present invention was devised in view of the above circumstances.An object of the present invention is to prevent product fragments and dust from falling below the top plate when cleaning the top plate with an air gun. It is an object of the present invention to provide a hopper arrangement structure for a bag making, filling and packaging machine which is advantageous in the above aspects.

In order to achieve the above-mentioned object, the present invention provides a hopper arrangement structure for a bag-forming-fill-sealing machine, which is provided with a top plate provided with a hole through which a hopper of a filling cylinder protrudes, the top plate having a hole half formed in the hole. a top plate main body having a half portion of the hole, and a top plate division body having a remaining half portion of the hole and detachably attached to the top plate main body, the top plate main body having a half portion of the hole A first upright wall is provided to protrude upward from the entire circumference of the edge, and a second upright wall is provided to protrude upward from the entire circumference of the edge of the remaining half of the hole of the top plate division body, When the top plate division body is attached to the top plate main body, the first upright wall and the second upright wall have the same height and are connected in the circumferential direction, and the first upright wall is located at the bottom of the hopper. It is characterized in that a collar portion is provided which is placed on the upper end and the upper end of the second standing wall.

When cleaning the top plate, even if product fragments and dust blown away by air are directed towards the hole, since the first and second upright walls stand around the hole, the particles and dust will be swept away from the hole. It is reflected in the direction away from the object and is blown away.
In addition, even if product fragments or dust thrown up by the air try to enter the hole from above, the hopper's flange is placed on the first and second upright walls. Entry of debris and dust into the pores is prevented.

FIG. 2 is a front view of a weighing machine and a bag-forming-filling-sealing machine. FIG. 2 is a perspective view of a top plate, a hopper, and a filling cylinder main body of the bag-forming-filling-sealing machine. It is a perspective view of a state where a top plate division body and a hopper are separated from a top plate main body. It is a perspective view of a state in which a top board division body and a hopper are attached to a top board main body. FIG. 3 is a cross-sectional side view of the top plate cut at the filling cylinder and hopper. It is a perspective view of a state in which a filling cylinder and a hopper are omitted and a top plate division body is attached to a top plate main body. It is a top view of the state where a filling cylinder and a hopper are omitted, and a top plate division body is attached to a top plate main body. It is a sectional side view of a state where a filling tube and a hopper are omitted, and a top plate division body is attached to a top plate main body. It is a perspective view of the state where the filling tube is arranged in the top plate main body. (A) is a plan view of the top plate main body, (B) is a side view thereof, and (C) is an enlarged perspective view of a first upright wall, a third upright wall, and a cutout portion. (A) is a plan view of the top plate division body, (B) is a side view of the same, and (C) is an enlarged perspective view of the second upright wall and the abutting wall portion. It is explanatory drawing of the top plate division body based on a modification, (A) is a top view of the top plate division body, and (B) is a BB sectional view of (A).

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the product is fed from the weighing machine 6 into the hopper 30 of the filling tube 18 of the bag-forming-fill-sealing machine 8, and the bag-forming-filling-sealing machine 8 forms a bag 10 in which the product is enclosed. .
The bag making, filling and packaging machine 8 includes a main body 12 and a frame 14.
The main body 12 includes a film supply mechanism (not shown), a former 16, a filling tube 18, a film feeding mechanism 20, a vertical sealing device 22, and a horizontal sealing device 24.
The frame 14 includes a bottom frame 1402, side plates 1404 that stand upright from the bottom frame 1402 and cover the left and right sides of the main body 12, and a top plate 26 that covers the upper part of the main body 12.
The filling cylinder 18 includes a filling cylinder main body 28 disposed vertically penetrating through the center of the former 16 and a hopper 30 provided at the top of the filling cylinder main body 28, and the hopper 30 projects above the top plate 26. There is.
As shown in FIGS. 2 and 3, the hopper 30 has a hopper body 3002 formed with a conical surface, and a hopper collar 3004 provided at the bottom of the hopper body 3002.
The hopper flange 3004 has a larger outline than the outline of a first upright wall 2610 (see FIG. 7) and a second upright wall 2620 (see FIG. 7) that form the inner peripheral surface of a hole 2602 (see FIG. 7), which will be described later. It is shaped like a ring plate.
Above this hopper 30, as shown in FIG. 1, a product loading hopper 6002 of the weighing machine 6 is arranged.
The former 16 folds a band-shaped packaging film having a width and length supplied by the film supply mechanism onto the outer circumferential surface of the filling cylinder main body 28 into a cylindrical shape.
The film feeding mechanism 20 includes a pair of belt/pulley mechanisms 2002, and intermittently feeds the film folded into a cylindrical shape downward by the former 16, and the vertical sealing device 22 seals both ends of the cylindrical film in the width direction. It is made into a cylindrical film by sealing.

The lateral sealing device 24 seals and cuts the lower portion of the cylindrical film in the longitudinal direction.
Specifically, the lower part of the cylindrical film in the length direction is sealed at the first position of the cylindrical film, and the weighed product from the product input hopper 30 is transferred from the filling cylinder main body 28 via the hopper 30 to this lower part. is placed inside the sealed cylindrical film.
Thereafter, the film transport mechanism 20 transports the cylindrical film from the first position to a second position below the first position.
In the second position, the upper part of the cylindrical film into which the product has been introduced is sealed by the horizontal sealing device 24 to form the bag 10 in which the product is enclosed, and the cylindrical film located in the first position above the bag 10 is sealed. The lower part of the film is sealed, and at the same time, the bag 10 containing the product is separated from the cylindrical film located at the first position.

As shown in FIGS. 2 and 3, the former 16 is supported by brackets 1410 protruding from left and right side plates 1404, and a lower support plate 1412 spanning these brackets 1410.
Further, as shown in FIG. 3, an upper support plate 1416 is spanned over pillars 1414 protruding from both sides of the lower support plate 1412, and the upper part of the filling cylinder main body 28 is supported by the upper support plate 1416.
As shown in FIGS. 5 and 6, the top plate 26 is provided with a hole 2602 through which the filling cylinder body 28 is inserted and the hopper 30 is projected onto the top plate 26.
As shown in FIG. 3, the inside of the filling cylinder main body 28 is formed as a passage 2802 through which the product falls, and as shown in FIGS. 3 and 5, a filling cylinder flange 2804 is provided at the upper end of the filling cylinder main body 28. In this embodiment, a filling cylinder flange 2804 is located in the hole 2602 of the top plate 26.

As shown in FIGS. 6 and 7, the top plate 26 has a half portion 2602A with a hole 2602 so that the filling tube 18 and former 16 can be easily replaced depending on the shape and size of the bag in which the product is sealed. The top plate main body 26A has a hole 2602, and the top plate division body 26B has a remaining half 2602B of a hole 2602 and is detachably attached to the top plate main body 26A.
In this embodiment, both the top plate main body 26A and the top plate divided body 26B are made of a steel plate having a thickness of about 1 to 5 mm, and are made of pressed sheet metal. Note that various conventionally known materials and manufacturing methods can be used for the material and manufacturing method of the top plate main body 26A and the top plate divided body 26B, but using sheet metal is advantageous in terms of cost reduction. becomes.

As shown in FIG. 10, the top plate main body 26A is formed of a flat surface and has a width W1 and a length L1.
The half portion 2602A of the hole 2602 is located at the center (intermediate portion) of the top plate main body 26A in the width W1 direction, and at a location near one of both ends of the top plate main body 26A in the length L1 direction. It is located away from the end of the
Further, the top plate main body 26A is provided with a notch 2604 that opens the half portion 2602A of the hole 2602 at one end.
As shown in FIG. 10(A), the cutout 2604 is formed in a fan shape whose width W2 gradually increases toward one end, and extends in the width direction of the top plate main body 26A at the one end. The width W2 of the cutout 2604 along the line is smaller than the width W1 of the top plate main body 26A.
A first upright wall 2610 having a uniform height is provided upward from the entire circumference of the edge of the half portion 2602A of the hole 2602.
Therefore, the inner circumferential surface of the first upstanding wall 2610 forms the inner circumferential surface of the half portion 2602A of the hole 2602.

Further, a third standing wall 2612 of a uniform height is provided to protrude from the first standing wall 2610 and standing along the edge of the cutout 2604. is formed low.
The third upright walls 2612 extend linearly, and the distance between the third upright walls 2612 in the width W1 direction of the top plate main body 26A, that is, the width W2 of the notch 2604, increases toward one end. It gradually becomes larger.
Strictly speaking, when the half portion 2602A of the hole 2602 is viewed from above, that is, when the first standing wall 2610 is viewed from above, as shown in FIG. and a straight line portion extending from both ends in the tangential direction thereof, and when it is flat, the third upright wall 2612 is continuous with this straight line portion.
Furthermore, as shown in FIGS. 10(B) and 10(C), hanging walls 2614 projecting downward are provided at the edges located at both ends in the width direction and both ends in the length direction of the top plate main body 26A. There is.
The top plate main body 26A is attached to the pair of side plates 1404 of the frame 14 using various conventionally known structures, and connects the upper ends of the pair of side plates 1404.

As shown in FIG. 11, the top plate division body 26B is formed with a flat surface, has a width W3 along the width W1 direction of the top plate main body 26A, and a length L3 along the length L1 direction. W3 and length L3 are smaller than width W1 and length L1 of the top plate main body 26A.
The remaining half portion 2602B of the hole 2602 is provided at one end of the top plate division body 26B in the length L3 direction.
The top plate division body 26B has a fan shape in which the width W3 gradually increases from one end to the other end in the length L3 direction, and is sufficient to close the cutout 2604 when attached to the top plate main body 26A. It is formed by shape and size.
In the present embodiment, the top plate division body 26B is attached to the top plate main body 26A as shown in FIGS. It is formed with a dimension larger than the dimension between the third upright walls 2612 in the width W1 direction.

As shown in FIG. 7, the radius of the remaining half 2602B of the hole 2602 of the top plate division body 26B is larger than the radius of the half 2602A of the hole 2602 of the top plate main body 26A.
A second upright wall 2620 is provided to protrude upward from the entire circumference of the edge of the remaining half 2602B of the hole 2602.
Therefore, the inner circumferential surface of the second upright wall 2620 forms the inner circumferential surface of the remaining half 2602B of the hole 2602.
As shown in FIGS. 7, 8, 11(A), and (C), the remaining half of the hole 2602 is provided at both circumferential ends of the second upright wall 2620 at the same height as the second upright wall 2620. A contact wall 2622 is provided that extends radially inward of 2602B and can come into contact with the circumferential end of the first upright wall 2610.
The top plate division body 26B is placed on the third upright wall 2612, and as shown in FIG. 4, is attached to the end surface of the second upright wall 2620 with screws 2630 or bolts. Therefore, although not shown in the drawings, screw insertion holes and bolt insertion holes are formed in the top plate division body 26B, and screw holes are formed in the end surface of the second upright wall 2620.
In addition, in order to attach the top plate divided body 26B to the top plate main body 26A, for example, the end of the top plate divided body 26B is placed opposite to the hanging wall 2614A at one end in the length direction of the top plate main body 26A shown in FIG. Various conventionally known mounting structures can be used, such as installing a hanging wall and attaching a magnet attached to the hanging wall to the hanging wall 2614A of the top plate main body 26A to attach the top plate divided body 26B to the top plate main body 26A. can be adopted.
With the top plate division body 26B attached to the top plate main body 26A in this manner, as shown in FIG. Further, as shown in FIG. 7, the contact wall 2622 contacts both ends of the first upright wall 2610, so that the first upright wall 2610 and the second upright wall 2620 are connected without any gaps in the circumferential direction. Around the periphery, the top plate main body 26A and the top plate divided body 26B are connected vertically without any gap.

Next, attachment of the filling cylinder 18 to the top plate 26 will be explained.
First, as shown in FIG. 3, with the top plate division body 26B removed, as shown in FIGS. let
In this embodiment, the filling cylinder flange 2804 of the filling cylinder main body 28 is located in the half 2602A of the hole 2602, that is, inside the inner circumferential surface of the first upstanding wall 2610.
Next, the top plate division body 26B is attached to the top plate main body 26A.
In this case, as shown in FIGS. 6 to 8, the remaining half 2602B of the hole 2602 of the top plate division body 26B is aligned with the half 2602A of the hole 2602 of the top plate main body 26A, and the contact walls 2622 at both ends are aligned. are in contact with both ends of the first standing wall 2610 in the circumferential direction, the top plate divided body 26B is placed on the third standing wall 2612, and the top plate divided body 26B is attached to the end face of the third standing wall 2612 with screws 2630 or bolts. Attach.
As a result, as shown in FIGS. 7 and 8, the portions on both sides of the second upright wall 2620 in the circumferential direction including the abutment wall 2622 are placed on the third upright wall 2612, and the abutment wall 2622 is placed on the third upright wall 2612. It abuts against the circumferential end of the first standing wall 2610. That is, the first upright wall 2610 and the second upright wall 2620 are connected in a continuous state without any vertical gap or horizontal gap.
Further, as shown in FIG. 5, the filling cylinder flange portion 2804 of the filling cylinder main body 28 is located inside the inner circumferential surface of the first upright wall 2610 and the inner circumferential surface of the second upright wall 2620.

Next, the hopper flange 3004 of the hopper 30 is placed on the first upright wall 2610 and the second upright wall 2620, and as shown in FIG. Attach to the top of the flange. Therefore, although not shown in the drawings, screw insertion holes and bolt insertion holes are formed in the hopper flange 3004, and screw holes are formed in the filling cylinder flange 2804.
Note that when the hopper flange 3004 is attached to the upper surface of the filling cylinder flange 2804, the hopper flange 3004 is placed on the first upright wall 2610 and the second upright wall 2620, as shown in FIG. Or, the hopper flange 3004 is in a state in which it presses the first upright wall 2610 and the second upright wall 2620 slightly downward.
This completes the attachment of the filling cylinder 18 to the top plate 26, and when the filling cylinder 18 is to be removed from the top plate 26, the operation opposite to the above is performed.

Next, the effects of the present invention will be explained.
When manufacturing the bag body 10 in which the product is enclosed by the weighing machine 6 and the bag-forming-fill-sealing machine 8, fragments and dust of the product fall on the top plate 26 when the product is introduced into the hopper 30, and these fragments and dust accumulates on the top plate 26.
Then, in order to prevent these pieces and dust from falling below the top plate 26, the top plate 26 is cleaned with an air gun.
In this case, as shown in FIG. 5, a first standing wall 2610 and a second standing wall 2620 stand up from the top plate 26 all around the hole 2602 of the top plate 26, and the hopper flange 3004 are placed on the first standing wall 2610 and the second standing wall 2620.
That is, the space around the hole 2602 in the top plate 26 is closed by the first upright wall 2610, the second upright wall 2620, and the hopper collar 3004.
Therefore, even if product fragments and dust blown away by the air head towards the hole 2602, since the first upright wall 2610 and the second upright wall 2620 stand up around the hole 2602, those fragments and dust will be removed from the hole. 2602 and is blown away.
Furthermore, even if product fragments and dust thrown up by the air try to enter the hole 2602 from above, the hopper flange 3004 is placed on the first upright wall 2610 and the second upright wall 2620. 3004 prevents these particles and dust from entering the holes 2602.
That is, when cleaning the top plate 26, product fragments and dust blown away by air pass through the gap between the inner peripheral surface of the hole 2602 of the top plate 26 and the outer peripheral surface of the filling cylinder 18, as in the conventional case. This is advantageous in preventing the top plate 26 from falling downward.

Further, in the present invention, the top plate 26 is divided into two on an imaginary line passing through the center of the hole 2602 and in the width W1 direction of the top plate main body 26A, and the top plate divided body 26B has the same width W1 as the top plate main body 26A. It may be formed into a rectangular plate shape.
However, as in the present embodiment, the top plate main body 26A is provided with a notch 2604 that opens the half portion 2602A of the hole 2602 at one end with a width W2 smaller than the width W1 of the top plate main body 26A, If the top plate division body 26B is formed in a shape and size that closes the cutout 2604, the top plate division body 26B can be made smaller and lighter.
Therefore, when replacing the filling cylinder 18 or the former 16, the top plate divided body 26B can be easily attached and detached, which is advantageous in increasing the efficiency of the bag manufacturing operation by the weighing machine 6 and the bag-forming-filling-sealing machine 8. .
Further, the notch 2604 may be formed in a rectangular shape with the diameter of the half portion 2602A of the hole 2602 as the short side, but as in this embodiment, the notch 2604 has a width W2 smaller than the top plate main body 26A. If the filling cylinder 18 is formed into a fan shape, it can be easily inserted into and removed from the half 2602A of the hole 2602, which is advantageous in easily replacing the filling cylinder 18 and the former 16. This is more advantageous in reducing the size and weight of the divided plate body 26B, and it is more advantageous in increasing the efficiency of the manufacturing operation of the bag in which the product is enclosed by the weighing machine 6 and the bag-forming-fill-sealing machine 8.

Further, in the present invention, the third upright wall 2612 that stands up along the edge of the cutout 2604 may be omitted.
However, if the third upright wall 2612 is provided as in this embodiment, even if product fragments and dust blown away by air when cleaning the top plate 26 are directed toward the notch 2604, the edge of the notch 2604 Since the third upright wall 2612 is upright, the pieces and dust are reflected away from the cutout 2604 and blown away.
Therefore, compared to the case where the flat top plate divided body 26B is placed on the flat top plate main body 26A, it is easier to prevent intrusion into the notch 2604 from the joint between the top plate divided body 26B and the top plate main body 26A. It will be advantageous.
In this case, as shown in FIG. 12, the top plate division body 26B is suspended from both sides of the top plate division body 26B in the width direction, and the top plate division body 26B is placed on the third upright wall 2612. When the configuration includes a hanging wall 2624 facing the third upright wall 2612, product fragments and dust blown away by air when cleaning the top plate 26 are collected between the top plate divided body 26B and the second upright wall 2620. Since the hanging wall 2624 prevents direct access to the location where the top plate is located, it is more advantageous to prevent entry into the notch 2604 from the joint between the top plate division body 26B and the top plate main body 26A.

Further, in the present invention, the abutment wall 2622 may be omitted.
For example, when the top plate main body 26A and the top plate divided body 26B are both formed by casting, or are integrally molded using a mold using synthetic resin, when the top plate divided body 26B is attached to the top plate main body 26A, the top plate A continuous cylindrical wall is formed by the first upright wall 2610 of the main body 26A and the second upright wall 2620 of the top plate division body 26B, and both ends of the first upright wall 2610 and both ends of the second upright wall 2620 are aligned with high precision, and the abutment wall 2622 becomes unnecessary.
However, in order to reduce costs, if the top plate main body 26A and the top plate divided body 26B are formed by press working using a steel plate, they cannot be formed with high precision compared to those made by casting or molding. It is conceivable that both ends of the first standing wall 2610 and both ends of the second standing wall 2620 cannot be aligned with high accuracy.
If both ends of the first upright wall 2610 and both ends of the second upright wall 2620 cannot be aligned, product fragments and dust blown by air will enter the hole 2602 through the gap.

Therefore, in this embodiment, the remaining half 2602B of the hole 2602 of the top plate division body 26B is formed in advance with a radius larger than the radius of the half 2602A of the hole 2602 of the top plate main body 26A. did.
At both ends of the second standing wall 2620 in the circumferential direction, the second standing wall 2620 has the same height as the second standing wall 2620 and extends inward in the radial direction of the remaining half portion 2602B of the hole 2602 in the circumferential direction of the first standing wall 2610. An abutment wall 2622 that can be abutted on the end of the is provided.
In this way, dimensional errors in the radius and shape of the first upright wall 2610 and the second upright wall 2620 are absorbed by bringing the contact wall 2622 into contact with the circumferential end of the first upright wall 2610.
That is, the abutment walls 2622 are interposed between both ends of the first standing wall 2610 in the circumferential direction and both ends of the second standing wall 2620 in the circumferential direction, and the first standing wall 2610 and the second standing wall 2620 are press-formed. Even if a dimensional error is included, the first upright wall 2610 and the second upright wall 2620 are connected in a continuous manner.
This is advantageous in reducing costs while preventing product fragments and dust blown away by air during cleaning of the top plate 26 from entering the holes 2602.

6 Weighing machine 6002 Product loading hopper 8 Bag making, filling and packaging machine 10 Bag body 12 Main body 14 Frame 1402 Bottom frame 1404 Side plate 1410 Bracket 1410
1412 Lower support plate 1414 Pillar 1416 Upper support plate 16 Former 18 Filling cylinder 20 Film feed mechanism 2002 Belt/pulley mechanism 22 Vertical sealing device 24 Horizontal sealing device 26 Top plate 26A Top plate main body 26B Top plate division body 2602 Hole 2602A Hole half Part 2602B Remaining half of the hole 2604 Notch 2610 First standing wall 2612 Third standing wall 2614, 2614A Hanging wall 2620 Second standing wall 2622 Contact wall 2624 Hanging wall 2630, 2632 Screw 28 Filling cylinder main body 2802 Passage 2804 Filling Cylinder collar 30 Hopper 3002 Hopper body 3004 Hopper collar

Claims (6)

A hopper arrangement structure for a bag-forming-fill-sealing machine comprising a top plate provided with a hole through which a hopper of a filling cylinder protrudes,
The top plate is composed of a top plate main body having one half of the hole, and a top plate division body having the other half of the hole and detachably attached to the top plate main body,
A first upright wall is provided to protrude upward from the entire circumference of the edge of the half of the hole of the top plate main body,
A second upright wall is provided to protrude upward from the entire circumference of the edge of the remaining half of the hole of the top plate division body,
When the top plate division body is attached to the top plate main body, the first upright wall and the second upright wall have the same height and are connected in the circumferential direction,
A flange is provided at the lower part of the hopper, and is placed on the upper end of the first standing wall and the upper end of the second standing wall.
A hopper arrangement structure of a bag making, filling and packaging machine characterized by the following. The top plate main body has a width and a length, and the top plate division body has a width along the width direction and a length along the length direction of the top plate main body,
The half of the hole is located in the middle part of the top plate main body in the width direction, and is located away from the one end at a location near one of both longitudinal ends of the top plate main body. installed in certain places,
The top plate main body is provided with a notch having a width smaller than the width of the top plate main body and opening half of the hole to the one end,
The top plate division body has a shape such that the width and length of the top plate division body are smaller than the width and length of the top plate main body and are sufficient to close the notch when attached to the top plate main body. formed by the size,
A hopper arrangement structure for a bag making, filling and packaging machine according to claim 1. The cutout is formed in a fan-shape whose width along the width direction of the top plate body gradually increases toward the one end,
The top plate division body has a fan shape in which the width of the top plate division body gradually increases from one end to the other end in the length direction of the top plate division body ,
The remaining half of the hole is provided at one end in the length direction of the top plate division body,
3. A hopper arrangement structure for a bag making, filling and packaging machine according to claim 2. The top plate main body is provided with a third upright wall that is continuous with the first upright wall and is lower in height than the first upright wall that stands up along the edge of the cutout,
The top plate division body is placed on the third upright wall.
4. A hopper arrangement structure for a bag making, filling and packaging machine according to claim 2 or 3. The top plate division body is provided vertically from both sides of the top plate division body in the width direction, and has a hanging wall facing the third upright wall when the top plate division body is placed on the third upright wall. It consists of
5. A hopper arrangement structure for a bag making, filling and packaging machine according to claim 4. Both the top plate main body and the top plate division body are made of sheet metal made of steel plate,
The remaining half of the hole of the top plate division body is formed with a radius larger than the radius of the half of the hole of the top plate main body,
At both circumferential ends of the second upright wall, circumferential ends of the first upright wall extend radially inward of the remaining half of the hole at the same height as the second upright wall. An abutment wall that can be abutted on the part is provided,
The hopper arrangement structure of a bag making, filling and packaging machine according to any one of claims 1 to 5, characterized in that:

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