JPS6116970Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a packaging machine that wraps items in thermofusible packaging bags made of synthetic resin, etc. It is closed.

(Prior Art) Currently, for example, sandwich sandwiches are packaged as follows. In other words, Sanderutsch is the 16th
As shown in the figure, the approximately square bag is cut into two triangular pieces, and the triangular sandwich bag, that is, the article to be packaged A, is placed in a packaging bag B made of synthetic resin film or the like as shown in Figure 17 ( 18), the front piece D, the side pieces E, F, and the back piece G of the opening C of the bag B are folded inward, respectively, as shown in FIGS. 19 to 22, for example, to close the opening. ,
The part is glued with cellophane tape,
All of these tasks are performed manually. Therefore, packaging is time-consuming and not only inefficient, but also undesirable in terms of appearance since the overlapping portions are glued together with cellophane tape.

Therefore, recently, a packaging machine described in JP-A-55-102378 has been developed which automatically performs the above-mentioned packaging. This conventional technology allows a conveyor to which buckets are attached at predetermined intervals to be able to move endlessly in the horizontal direction, and during the movement of the conveyor, a rising wall behind the opening of a sandwich packaging bag stored in the bucket is placed in the upper part of the conveyor. A folding piece that can be folded forward is provided so as to be rotatable back and forth, and a folding piece that is pressed against the rising wall of the opening of the packaging bag and folded backward is arranged in front of the folding piece. A horizontal strip plate is provided at the front of the conveyor, extending horizontally along the opening end of the bucket of the conveyor, so that the folded front and rear walls of the packaging bag slide into contact with the lower surface of the plate. Folding guide members are provided for the rising walls on both the left and right sides of the opening of the packaging bag that slopes toward the center, and the left and right sides of the packaging bag that is folded over the upper surface of the strip plate are placed above the conveyance terminal end of the conveyor. A welding device for integrally welding walls is installed so that it can be moved up and down.

(Problems to be Solved by the Invention) According to the above-mentioned conventional technology, automatic packaging of sandwich sandwiches is possible. However, this conventional technique has problems in the following points.

(a) In the conventional technology, two kickers are fitted onto swing shafts that protrude from the machine frame above the transporting bucket, and the rear of the packaging bag is raised by swinging the pushers forward. Since the structure is such that the wall is folded forward (see page 5, line 18 of the specification to page 6, line 1 of the specification), the following problems arise. That is, due to the swing axis, the kicker swings in a fixed position, and this swinging folds the rear upright wall of the bag forward, but at this time, the packaging bags on the conveyor are moved in the same direction as the swinging direction of the kicker. It is moving in the direction. Therefore, while the car chases the bag, its swing causes the rear standing wall to bend in the direction of travel. Therefore, there is a risk that the bag will pass the position of the kicker before the rear upright wall is completely folded in.

(b) In the prior art, a folding plate 19 is provided in the running path of the bucket, and one side of the side rising wall of the packaging bag is folded in by this folding plate 19, and the folded rising wall Fold the tip of plate 1
9, and a folding plate 22 arranged on the rear side of this presser plate 21 (on the side where the bucket travels) holds the other side of the side wall of the packaging bag. The structure is such that it is folded over and over on the one rising wall 2, and the tip of the folded rising wall 2 is held down by a presser plate 24 provided on the rear side of the folding plate 19 (as described in the specification). (see page 6, line 16 to page 8, line 3), the following problems arise. That is, while the folded upright walls C and D are being welded using a welding machine, the upright walls C and D are held down with a holding plate so that they do not rise up, but until they are welded. The tip end side of the upper wall 2 of the spacer runs while slidingly contacting the holding plate 24. Therefore, there is a risk that the tip of the upright wall 2 may be curled up due to contact friction with the plate 24 and be displaced from the plate 24 while the vehicle is running, and in this state, the upright wall 2 cannot be welded.

Therefore, the technical objective of the present invention is to solve the above-mentioned problems.

(Means for solving the above) The present invention, as a means for solving the above problem (a),
A folding rod with a bent base end is rotatably provided on the bucket (transfer piece), and the folding rod is rotated while traveling together with the transfer piece to bend the rear piece of the packaging bag. This is what I did.

In addition, as a means to solve the problem (b), the present invention provides a blower at the upper front part of the second heating welder, and uses the air discharged from the blower to melt the bent back piece. It is designed to be held in place while it is being worn.

That is, the present invention (a) arranges an arbitrary number of transfer pieces in parallel to form a storage section that matches the shape of the object to be packaged, and rotates them endlessly; (b) a transfer device configured to store and transfer the product in a plastic packaging bag with the opening of the bag facing upward;
(c) a presser member configured to press the front piece of the opening of the bag onto the object to be packaged while the object to be packaged passes through the section;
(d) a first guide holding plate located on the rear side of the holding body and with a slight gap from the upper edge of the transfer piece; 1st
a second guide presser plate located somewhat rearward from the front edge of the guide presser plate and with a slight gap from the first guide presser plate; (e) on the rear side of the second guide presser plate; (f) a first heating welder, which is arranged to be movable up and down, and configured to be intermittently lowered to the position of the upper edge of the transfer piece in relation to the moving speed of the transfer piece; A second heat welder is located on the rear side of the first heat welder and is movable up and down, and is configured to be intermittently lowered to the upper edge of the transfer piece in relation to the moving speed of the transfer piece. A heating welder, (g) installed on each transfer piece from one side of the transfer piece to the other side so as to be in contact with the upper edge of the transfer piece; is bent, and the bent portion is rotatably attached to the side surface of the transfer piece, so that the transfer piece can be pivoted within a predetermined range toward the front side of the transfer piece using the pivoted portion as a fulcrum. a folding rod; (h) an air blower disposed in the upper part between the two heating welding machines with the air outlet facing downward; and (li) an air blower configured to constantly blow air onto the transfer piece from the air outlet; an engaging body for operating the folding rod, which is disposed on the side of the lower part between the heating welders and on the side of the pivoting part of the folding rod; A guide notch is formed in a diagonal direction so that the width gradually becomes wider from the front edge toward the rear, and each of the folding rods is normally in contact with the upper edge of the transfer piece. In addition, an engaging pin is provided protruding from the lower end side of the pivoting part of each folding rod, and after the folding rod reaches near the lower part of the first heating welder, the folding rod is The engaging pin of the rod engages with the engaging body to pivot the folded rod forward.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1 to 15 show an embodiment of the packaging machine according to the present invention, in which FIG. 1 is a schematic side view of the packaging machine, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. Fig. 1 is a cross-sectional view taken along the - line, Fig. 4 is an explanatory perspective view showing the main parts, Fig. 5 is a perspective view of the transfer piece, and Fig. 6 is a perspective view of the transport piece.
The figure is a plan view of the guiding rod, FIG. 7 is a front view showing an example of the first heating welder, FIG. 8 is a front view showing an example of the second heating welder, and FIG. 9 is a front view of the folding rod. An explanatory diagram showing the working state, Fig. 10 is an explanatory diagram showing the working process of the presser body, Figs. 11 and 12 are explanatory diagrams showing the working process of the guide holding plate, and Fig. 13 is an explanatory diagram showing the working process of the presser plate. FIG. 14 is an explanatory diagram showing the working process of the folding rod, and FIG. 15 is an explanatory diagram showing the working process of the blower and the second heating welder. In these figures, 1 indicates a transfer device;
The transfer device 1 is configured so that an arbitrary number of transfer pieces 3 forming a storage section 2 matching the shape of the packaged object A (see FIG. 19) are arranged in parallel and rotated endlessly. In the embodiment, as shown in FIGS. 1 and 2, endless chains 6 and 7 are strung between sprockets 4, 4 and 5, 5, which are arranged oppositely at a predetermined distance, respectively, to rotate endlessly. A connecting bar 8 is bridged with a predetermined gap between both chains 6 and 7, and both ends of the connecting bar 8 are fixed to the chains 6 and 7 (see Fig. 2). 8, fix the rear lower end of each piece 3 to
In the figure, the pieces are arranged side by side and rotated endlessly, and each piece 3 forms a triangular storage part 2. In this case, the number of pieces 3 can be increased or decreased as desired, and the shape of the storage section 2 can also be changed as appropriate depending on the shape of the packaged object A. 9 is a regulation plate attached to one side of the storage section 2 of each piece 3; 10 is a transfer device 1;
This is a regulating plate located on the upper side of the piece 3 on the opposite side to the regulating plate 9 and supported by the machine base of the transfer device 1.
0 restricts the lateral movement of the packaged object A within the storage section 2. In the above description, the regulation plate 10 may be configured to be able to approach and move away from the piece 3, and the widths of both regulation plates 9 and 10 may be adjusted.

11 is a folding rod provided on each transfer piece 3;
The folding rod 11 is placed on the upper edge of each transfer piece 3 so as to abut against the transfer piece 3a, and is provided from one side of the transfer piece 3 toward the other side. The bent portion is pivotably attached 12 to the side surface of the piece 3 on the regulating plate 9 side, and each folding rod 11 is fixed toward the front side (movement direction side) of the piece 3 using the pivoted portion as a fulcrum. In the embodiment, a notch 13 is provided at the upper edge of each regulating plate 9, and the structure is configured such that it can be turned between the notch 13 and the upper edge 3a of the piece 3. has been done. Reference numeral 14 denotes an engagement pin protruding outward from the lower end of the pivoting portion of each folding rod 11, and by engaging the pin 14 with an engaging body to be described later, the folding rod 11 is pivoted forward. It is something. Reference numeral 15 denotes a weight fixed to the lower side of the pivoting part of the folding rod 11, and each folding rod 11 is controlled by the weight 15 at all times (however, in the embodiment, when the packaged object is being transported).
When the engaging pin 14 is brought into contact with the upper edge 3a and engaged with an engaging body to be described later, it pivots forward, and when the engagement is released, it returns to its original position due to the weight of the weight. It is composed of In this case, the folding rod 11 may be returned to its original position using a spring.

Reference numeral 16 indicates a presser body disposed at the upper part of the transfer device 1, and the presser body 16 is located at the center of the upper part of the piece 3,
A presser rod 18 whose lower end is positioned slightly above the upper edge 3a of the piece 3 and supported by the support 17;
The support 17 is brought into contact with the upper edge 3a of the
The bag of the packaging bag B of the packaged item A is The front piece D of the opening C is pressed onto the object to be packaged. 20 is presser foot 1
The machine base 2 of the transfer device 1 is located on the rear side of the transfer device 1 with a slight gap from the upper edge 3a of the transfer piece 3.
A first guide holding plate fixedly disposed on the guide holding plate 20 is formed with a guide notch 22 which is cut out diagonally from the front edge of the plate toward the rear side so as to gradually become wider. ing. 23 is the first guide holding plate 2
0, the front edge of which is positioned somewhat rearward than the front edge of the holding plate 20, and fixedly disposed on the machine base 21 of the transfer device 1 with a slight gap between the holding plate 20 and the holding plate 20. In the guide holding plate, a guide notch 24 is formed in the guide holding plate 23, which is diagonally cut out so that the width gradually increases from the front edge of the plate toward the rear. One side E of the opening C of the bag of the packaged article A to be transferred by the device 1 is provided with a guide notch 22, and the other side F is provided with a guide notch 24 so that the packaged item A is not allowed to pass inside while passing through the guide notch 22. It is folded over and over.

Reference numeral 25 denotes a first heat welder which is located on the rear side of the second guide holding plate 23 and supported by a suitable support member (not shown) so as to be able to rise and fall freely; The structure is such that the upper edge 3a of the piece 3 is intermittently lowered in relation to the moving speed of the piece 3, that is, the upper surface of the packaged object A in the storage section 2. As a mechanism, for example, the heating welder 25 is supported by a solenoid valve with a built-in spring, and the solenoid valve is intermittently opened and closed by a limit switch to move it up and down.
Alternatively, any means such as an air cylinder, a link mechanism, a cam mechanism, etc. can be adopted. 26 is a heater of the first heat welding device (see FIG. 7). A second heat welder 27 is provided at the rear side of the first heat welder 25 and is supported by a suitable support member (not shown) so as to be able to rise and fall freely. Similar to the first heating welder 25, 27 is configured to intermittently lower the piece 3 to the position of the upper edge 3a in relation to the transfer speed of the piece 3, and has an intermittent drive mechanism. The same means as in the case of the first heating welder 25 can be adopted. 28 is a heater of the second heating welder 27 (see FIG. 8). 29 is provided in the upper part between the two heating welders 25 and 27,
The blower 29 is configured to discharge hot air from an outlet 30, and the blower 29 is supported by an appropriate support member (not shown) with the blower outlet 30 facing the front side of the second heating welder 27. The configuration is such that hot air is discharged from the outlet 30 onto the transfer piece 3 on the front side of the second heating welder 27.

Reference numeral 31 denotes an engaging body for operating the folding rod, which is located on the lower side of the rear side of the first heating welding device 25 and located on the side of the pivoting part of the folding rod 11. A notch 33 is provided in the upper piece 32a of the bent engagement piece 32, and the engagement piece 32 is folded back and attached to the rod 1.
It is positioned at a height corresponding to the engagement pin 14 of 1 and is fixed to the base of the transfer device 1 by a support 34 so as to be vertically adjustable. Then, when the folding rod 11 reaches near the lower part of the first heating welder 25, or at a point where it passes through the lower part of the welder 25,
The engaging pin 14 of the folding rod 11 engages with the engaging piece 32 and pivoting the pin 14 rearward, thereby pivoting the folding rod 11 forward. Before descending to the upper part of the folding rod 11, the engagement is released by the notch 33, and the folding rod 11 is returned to its original position.

Next, the usage and operation of the packaging machine shown in the above embodiment will be explained. The transfer device 1 is driven, and the article to be packaged A is put into a packaging bag B as shown in FIG. 21, and then stored in each storage section 2 with the opening of the bag facing upward as shown in FIG.

Therefore, as each piece 3 moves, the storage section 2
The object to be packaged A inside the bag is transferred, and first, at the position of the presser body 16, the front piece D of the opening C of the bag B is moved by the presser rod 18 and the presser spatula piece 19 to the object to be packaged A.
While passing through this part, it is pressed downward and the first
As shown in FIG. 0 and FIG. is guided and pressed by the guide part 22 of the bag B, and is folded over and over the front piece D as shown in FIGS. 11 and 20, and the side piece F on the other side of the opening C of the bag B It is guided and pressed by the guide portion 24 of the plate 23, folded over and over on the upper surface of the side piece E as shown in FIGS. 12 and 21, and in this state is sent to the first heating welder 25 side. and,
When the article to be packaged A reaches the position of the first heating welder 25, the welder 25 descends, contacts the folded upper surface of the side piece F, presses and heats this part, and welds it H (the thirteenth
21), and as a result, the opening C of the bag B is closed by the front piece D and the side pieces E and F, and the bag B
The folded lug I (see FIG. 21) formed by being folded over the rear piece G in the above process by the rear piece G and parts of both side pieces E and F of the opening C is 13 As shown in the figure, it is pressed onto the folding rod 11 and moves. Therefore, when the folding rod 11 reaches the vicinity of the lower part of the first heat welding device 25, the engaging pin 14 of the folding rod 11 is inserted into the engaging body 3 as shown in the ninth figure.
Since it engages with the engagement piece 32 of 1, the engagement pin 14,
Therefore, as the piece 3 moves, the folding rod 11 turns as shown by the chain line in the same figure. however,
In the figure, for convenience, the engaging body 31 is shown in a moved state. Therefore, due to the turning movement of the folding rod 11, the bent lug I on the rod 11
1 and pushed back toward the packaged object A side, and the 14th
As shown in Fig. 22, it is folded over and over on the side piece F. At this point, the engagement pin 14
is rotated higher than the height of the engaging piece 32, so the engagement with the engaging piece 32 is released and the upper piece 32a
has reached the notch of the folded rod 1.
1 is returned to its original position by the weight, but
The folded lug I folded onto the side piece F by the folding rod 11 is transferred while being pressed by hot air from the blower 29. (See Figure 15). Then, when the article to be packaged reaches the position of the second heating welder 27, the welder 27 descends, and the bent lug I
The bag B is brought into contact with the upper surface of the bag B and heated under pressure to be welded (see FIG. 22), whereby the opening of the bag B is completely welded and closed. The items packaged in the above manner are then transferred to the delivery side, where the pieces are 3 pieces.
is turned upside down (see Fig. 1), so it falls from the storage section 2 and is collected in a suitable receiving section.

(Effects) The present invention is constructed as described above, and the following main effects can be expected according to the present invention.

(1) Since the packaging operation can be carried out mechanically and efficiently, and the opening of the bag is folded and welded to close the lid, it is possible to achieve packaging that is aesthetically pleasing.

(2) The transfer piece is provided on each transfer piece so as to be in contact with its upper edge, facing from one side of the transfer piece to the other side, and the base end is bent. At the same time, the folding rod is configured such that the bent portion is pivotably attached to the side surface of the transfer piece, and can be pivoted within a predetermined range toward the front side of the transfer piece using the pivoted portion as a fulcrum. Since the folding rod is configured to engage with the engaging body at a predetermined position and swing forward, the folding rod rotates while traveling integrally with the transfer piece. Therefore, the folding rod turns under the same conditions as when it is stopped from the piece, so that the folding edge I of the bag can be folded over the side piece F in a good manner due to the turning of the folding rod. can.

(3) A blower is disposed in the upper part between the first and second heating welders with the blower outlet facing downward, and the blower outlet is configured to constantly blow air onto the transfer piece. Therefore, the folded lug I folded back by the folding rod is transferred while being pressed by the wind until it is welded in the second welding machine. Can be welded smoothly and well.

[Brief explanation of the drawing]

1 to 15 show an embodiment of the packaging machine according to the present invention, in which FIG. 1 is a schematic side view of the entire device, FIG. 2 is a sectional view taken along the - line in FIG. 1, and FIG. 1 is a sectional view taken along the - line in FIG. 1, FIG. 4 is an explanatory perspective view showing the main parts, FIG. 5 is a perspective view of the transfer piece, FIG. 6 is a plan view of the guide lever, and FIG. FIG. 8 is a front view showing an example of the first heating welder, FIG. 9 is an explanatory view showing the working state of the folding rod, and FIG. 10 is the presser foot. Fig. 11 and Fig. 12 are explanatory drawings showing the working process of the guide presser plate, Fig. 13 is an explanatory drawing showing the working process of the first heating welder, and Fig. 14 is an explanatory drawing showing the working process of the first heating welder. An explanatory diagram showing the working process of the rod, FIG. 15 is an explanatory diagram showing the working process of the blower and the second heating welder,
FIG. 16 to FIG. 22 are explanatory diagrams showing the packaging process. DESCRIPTION OF SYMBOLS 1... Transfer device, 2... Storage part, 3... Transfer piece, 3a... Upper edge of piece, 4, 5... Sprocket, 6, 7... Chain, 8... Connection bar,
9, 10...Regulation plate, 11 folding rod, 12...
Pivot connection, 13... Notch, 14... Engagement pin, 15
... Weight, 16 ... Presser bar, 17 ... Support, 1
8... Presser rod, 19... Presser spatula piece, 20,2
3... Guide holding plate, 21... Machine stand, 22, 24...
...Guide notch, 25...First heating welder, 27...
...Second heating welder, 29...Blower, 31...Engaging body, 32...Engaging piece, 32a...Top piece, 33...
...Notch, 34... Support, A... Item to be packaged, B
...Packaging bag, C...Bag opening, D...Front piece of opening, E, F...Side piece of opening, G...Rear piece of opening, H, J...Welding, I...Folded ear piece.

Claims (1)

[Claims for Utility Model Registration] (a) An arbitrary number of transfer pieces forming a storage section that matches the shape of the packaged object are arranged in parallel so that they can rotate endlessly, and the packaged object is heated. (b) A transfer device configured to store and transfer a bag in a fusible packaging bag with the opening of the bag facing upward;
(c) a presser body disposed at the upper part of the transfer device and configured to press the front piece of the opening of the bag onto the packaged item while the packaged item passes through the part; (c) the rear side of the presser body; (d) a first guide holding plate located on the first guiding holding plate, with a front edge of the first guiding holding plate; a second guide holding plate located somewhat rearward from the front edge and with a slight gap from the first guiding holding plate;
(e) It is located on the rear side of the second guide holding plate and is movable up and down, and configured to be intermittently lowered to the upper edge position of the transfer piece in relation to the moving speed of the transfer piece. (f) A first heat welder, which is located on the rear side of the first heat welder and is movable up and down, and the position of the upper edge of the transfer piece is determined in relation to the moving speed of the transfer piece. The second
A heating welder, (g) installed on each transfer piece from one side of the transfer piece to the other side so as to be in contact with the upper edge of the transfer piece; is bent, and the bent portion is rotatably attached to the side surface of the transfer piece, so that the transfer piece can be pivoted within a predetermined range toward the front side of the transfer piece using the pivoted portion as a fulcrum. a folding rod; (h) an air blower disposed in the upper part between the two heating welding machines with the air outlet facing downward; and (li) an air blower configured to constantly blow air onto the transfer piece from the air outlet; an engaging body for operating the folding rod, which is disposed on the side of the lower part between the heating welders and on the side of the pivoting part of the folding rod; A guide notch is formed in a diagonal direction so that the width gradually becomes wider from the front edge toward the rear, and each of the folding rods is normally in contact with the upper edge of the transfer piece. In addition, an engaging pin is provided protruding from the lower end side of the pivoting part of each folding rod, and after the folding rod reaches the vicinity of the lower part of the first heating welder, the folding rod is A packaging machine characterized in that an engaging pin of a return rod engages with the engaging body to swing the return rod forward.