JPH0237686Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a folding device that is used, for example, in a packaging machine for fresh food, for wrapping the product by folding the packaging film stretched over the packaging section of the machine. It is related to.

(Prior Art) This type of folding device is known in Japanese Patent Application No. 189426/1983. In this folding device, a rear folding member is installed between a pair of rails and is movable back and forth in the front and back direction along the same rail, and a pair of left and right folding members supported on the rear side of the rail so as to be rotatable in the left and right direction. Both left and right folding members are provided, and each of the left and right folding members has a guide groove in which a guide piece attached to the rear folding member is inserted, so that the left and right folding members can be opened and closed with respect to each other as the rear folding member moves back and forth. At the same time, a front folding member is installed between the front parts of the rail, and the spaces between these front, rear, left and right folding members are folded parts where each folding member approaches each other as the rear folding member moves forward, and a folding part is provided above the folded part. is equipped with an unloading conveyor that spans an endless belt. The guide piece is rotatable with respect to the rear folding member, and when the guide piece moves along the guide groove, it is rotated relative to the guide groove by contact with the guide groove. , the movement resistance of the guide piece can be reduced.

(Problem to be solved by the invention) By the way, when packaging an item, the end of the packaging film stretched in the packaging section is held by a pressing member, and the packaging film is pushed up from below by the item. The packaging film is folded under the product. At that time, the folded and stretched packaging film comes into contact with the lower sides of both the left and right folding members, so there is a risk that it may wrap around the guide piece that rotates and moves along the guide groove during folding. It was found that relative rotation with respect to the guide groove had the opposite effect.

The object of the present invention is to provide a packaging machine that can reliably fold a packaging film from the front, back, left, and right directions of an item, simplify the synchronized operation structure of the folding member, and prevent the packaging film from wrapping around the guide piece. An object of the present invention is to provide a packaging film folding device.

(Means for Solving the Problem) This invention provides a first folding member and a second folding member that are movable relative to each other on two opposing sides of the four peripheral parts, and On the other two sides, there are a third and second folding member which are rotatably supported on a plane below the movement plane of the second folding member in a direction perpendicular to the direction spanning the first and second folding members. A fourth folding member is provided, and as the second folding member moves back and forth to the first folding member, the third and fourth folding members are interlocked so that they can be opened and closed. For packaging, the space between the folding members is a folding part in which the folding members approach each other, and the packaging film that has been pushed up and stretched by the item from below is folded under the item above the folding part. In the film folding device, the interlocking structure between the second folding member and the third and fourth folding members is such that a guide piece rotatably attached to the second folding member is connected to the third and fourth folding members. The guide piece is movably engaged along a guide groove formed in the member, and the portion of the guide piece along the guide groove is flat, and when moving along the guide groove, the third and fourth folding members The gist of this is that it has become impossible to rotate relative to the body.

(Function) With the above configuration, when the third and fourth folding members interlock with each other so as to be openable and closable as the second folding member moves back and forth in the direction spanning the first folding member, the packaging film Even if the guide piece comes into contact with the lower side of the fourth folding member, the guide piece moves along the guide groove, but the part of the guide piece itself that runs along the guide groove is flat and does not move with respect to the third and fourth folding members. Since there is no relative rotation, the packaging film will not wrap around the guide piece.

(Example) An example of the present invention will be described below with reference to the drawings.

In this embodiment, the transport direction of the packaged object is the front direction, and the opposite direction is the rear direction, so in FIGS. 1 to 3, the right side of the drawing is the front, the left side is the rear, and the upper side of the figure is The left and lower sides will be described as right.
As shown in FIG. 1, a packaging film folding device 1 is installed above a conveying device 2 that spreads packaging films into a packaging section S, and as shown in FIG. A rear folding member 8 is a rear folding member 3 as a second folding member in which both sliders 5 supported so as to be movable in the front and rear directions with respect to the arranged rail 4 are connected by a guide plate 6 and rollers 7 on both the front and rear sides thereof. A pair of third and fourth shafts are mounted on a shaft 10 so as to be rotatable in the left-right direction on a plane below the plane of movement of the rear folding member 3 relative to the support plate 9 installed between both the rails 4 at the rear of the rear folding member 3. Both left and right folding members as folding members, coaxial 10
The guide groove 11 extends forward from the fitting part and is transparently provided along the longitudinal direction thereof. Note that the intermediate portions of the folding edges 8a on the inside of both the left and right folding members 8 are formed in a slightly concave shape.

Reference numeral 12 denotes a folding edge adjusting member rotatably attached to a shaft 13 on the base end side of the left and right folding members 8, as shown by the imaginary line in FIG. The auxiliary folding portion 14 at the tip portion can protrude from the tip edge 8b of both the left and right folding members 8. The folding edge adjustment member 12 is held by a leaf spring 15 on the lower side of its tip against the lower surface of both the left and right folding members 8, and the folding edge 8
It is fixed to both the left and right folding members 8 by screws 16 at appropriate protruding positions from a. At this time, the auxiliary folding portion 1 at the tip of the folding edge adjusting member 12
4 is adapted to be moved along the tip edges 8b of both the left and right folding members 8 as the folding member 4 rotates.

Reference numeral 17 denotes a guide piece rotatably attached to the left and right sides of the lower surface of the guide plate 6 of the rear folding member 3 by a threaded rod 18, and is fitted into the guide groove 11 of the left and right folding member 8, as shown in FIG. As shown in FIG.
Both side edges 11a of 1 are engaged. And the fifth
As shown in the figure, a portion 19a of the inner circumferential surface of the fitting groove 19 along both side edges 11a of the guide groove 11 is flat, so that the guide groove 19 of the guide piece 17
Relative rotation is completely prevented.

Reference numeral 20 denotes a front folding member as a first folding member comprising a plurality of rollers 21 installed between the front ends of both rails 4, and the rollers 21 are rotated only in the direction of arrow A by a belt 22. There is.

In FIG. 1, 23 is a pair of brackets erected on the rear end of the rail 4, and 24 is a support shaft 25 rotatably installed between the upper parts of the brackets 23.
It is a lever fixed to the shaft 26a, and is rotatably attached to a shaft 26a on an interlocking rod 26 that is driven up and down. 2
7 is a support shaft 25 on the outside of the bracket 23.
A pair of levers 28 are fixed to both ends of the lever 27, and a link 28 is rotatably attached to the tip of the lever 27 with a shaft 29, and a shaft 30 is rotatably attached to the tip of the slider 5. .

When the interlocking rod 26 is in the upward movement position, as shown in FIG.
is in the retracted position, and the left and right folding members 8 are in an open state. When the interlocking rod 26 moves downward from this state, the rear folding member 3 is pushed forward by the lever 27 and the link 28 as shown in FIG.
The positions of the guide grooves 11 of the left and right folding members 8 are regulated on the sides, so that the left and right folding members 8 are closed to each other, and a folding portion R is formed between the front, rear, left, and right folding members 20, 8, and 3. This folding section R corresponds to the packaging section S of the conveying device 2 shown in FIG.

In the unloading device 31 for an article W as a packaged article shown in FIG. 1, reference numeral 32 denotes a pair of support plates rotatably supported on a support shaft 33 installed between the lower portions of both the brackets 23. A conveyor 34 extending forward from the support shaft 33 and having an endless belt 34a made of sponge stretched between its front half is supported, and the conveyor 34 corresponds to the packaging section S of the conveying device 2.

35 is a belt sheave fixed to the drive shaft 34b of the conveyor 34; 36 is a belt sheave rotatably supported on the support shaft 33; both belt sheaves 35, 3;
A belt 37 is stretched between the two. A sprocket 38 is rotatably supported on the support shaft 33 so as to be interlocked with the belt pulley 36, and is driven and rotated by a chain 39.

When the chain 39 is rotated in the direction of arrow B, the belt 34a of the conveyor 34 is rotated in the delivery direction C via the sprocket 38, belt pulley 36, belt 37, and belt pulley 35. but,
Since the sprocket 38 is supported on the support shaft 33 by a one-way clutch 38a, the chain 39
rotation is not transmitted to the sprocket 38, and the belt 34a of the conveyor 34 does not rotate in the opposite direction.

Next, an outline of the actual packaging operation will be explained. The article W placed on the supply device 40 shown in FIG. 1 is transferred and placed on the pedestal 41 that has moved downward. At this time, the rear folding member 3 is moved backward by the upward movement of the interlocking rod 26.

When the conveyance device 2 is driven in synchronization with this feeding, the packaging film is cut into a certain length and conveyed toward the packaging section S at the center of the conveyance device 2. The packaging film on the packaging section S is held by both the front and rear pressing members 42 and 43 shown in FIG. 1, and is brought into a set state.

From this packaging film set state, the pedestal 41
is moved upward and the article W is pushed up to the packaging position, the interlocking rod 26 is moved down, the rear folding member 3 in the retreated position moves forward, and the left and right folding members 8 are closed together as the rear folding member 3 moves forward. Then, when the pedestal 41 is moved down again, the packaging film is folded under the item W from both rear and left and right directions while the item W is placed on the rear folding member 3.

Thereafter, the interlocking rod 26 is moved upward again to move the rear folding member 3 backward, and with this retreat, both the left and right folding members 8 open each other, and both the front and rear presser members 4
2 and 43 are moved down to release the clamped state. Therefore, the article W is conveyed forward by the rotation of the belt 34a, and at this time, the packaging film hits the front folding member 20 on the lower side of the article W and is also folded from the front, so that the article When the item W passes through, the folding from the front overlaps with the folding from both the rear and left and right directions, forming a folded portion at the bottom of the item W.

After packaging, the same item W is carried out, and one process is completed.

Now, during the above-mentioned folding operation, the folded and stretched packaging film comes into contact with the lower sides of both the left and right folding members 8, but the guide piece 17 is relative to the guide groove 11 when moving along the guide groove 11. Since the packaging film does not rotate, the guide piece 17
It will no longer get wrapped around.

(Effects of the invention) As described in detail above, the invention provides a first folding member and a second folding member that are movable relative to each other on two opposing sides of the four peripheral parts, and a second folding member that is movable relative to each other. The other two facing parts include a second folding member which is rotatably supported on a plane below the movement plane of the second folding member in a direction perpendicular to the direction extending between the first and second folding members. Third and fourth folding members are provided, and as the second folding member moves back and forth to the first folding member, the third and fourth folding members are interlocked to be able to open and close with each other, and the first to fourth folding members are A packaging in which each folding member approaches each other between the four folding members, and a packaging film that has been pushed up and stretched by an item from below is folded into a position above the folding portion below the item. In this film folding device, the interlocking structure between the second folding member and the third and fourth folding members is such that a guide piece rotatably attached to the second folding member is connected to the third and fourth folding members. The folding member is movably engaged along a guide groove formed in the folding member, and the portion of the guide piece along the guide groove is flat, and when moving along the guide groove, the third and fourth folding members It is characterized by being unable to rotate relative to the member. Therefore, the packaging film can be reliably folded from all sides of the product W, and the packaging film that has been folded and stretched under the product W during the folding operation is folded under the third and fourth folding members 8. At this time, the guide piece 17 moves along the guide groove 11, but the guide piece 17
Since the portion 19a along the guide groove 11 is flat and does not rotate relative to the third and fourth folding members 8, wrapping of the packaging film around the guide piece 17 is prevented. It has a preventive effect. Moreover, the guide piece 17 attached to the second folding member 3 and the third and fourth folding members 8
The engagement with the guide groove 11 formed in the guide groove 11 has the effect of simplifying the synchronized operation structure of both the members 3 and 8.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a packaging machine for fruits and vegetables using the folding device according to the present invention, Fig. 2 is a schematic plan view of the folding device, Fig. 3 is a schematic side sectional view of the folding device, and Fig. 4 is a schematic side view of the folding device. FIG. 5 is a partial sectional view showing the engagement state between the guide piece of the rear folding member and the guide groove of both left and right folding members, and FIG. 5 is taken along line X-X in FIG.
FIG. Folding device...1, Rear folding member as second folding member...3, Left and right folding members as third and fourth folding members...8, Shaft...10,
Guide groove...11, side edge...11a, guide piece...
...17, Fitting groove...19, Plane portion along the guide groove...19a, Front folding member as the first folding member...20, Folding part...R, Packaging part...
S. Goods...W.

Claims (1)

[Claims for Utility Model Registration] 1. First folding members 20 that are movable relative to each other are provided on two opposing sides of the four peripheral areas.
and a second folding member 3, and the first and second folding members 20, 3 are provided on the lower plane than the moving plane of the second folding members 20, 3 on the other two opposing sides. Third and fourth folding members 8 are provided which are supported by a shaft 10 so as to be rotatable in a direction perpendicular to the direction extending therefrom, and as the second folding member 3 moves back and forth to the first folding member 20 The third and fourth folding members 8 are interlocked with each other so that they can be opened and closed, and each folding member 20,
A packaging film in which folding portions 3 and 8 are close to each other, and the wrapping film is pushed up and stretched by an item W from below at a position above the folding portion R, and is folded under the item W. In the folding device, the interlocking structure between the second folding member 3 and the third and fourth folding members 8 is such that a guide piece 17 rotatably attached to the second folding member 3 is connected to the third and fourth folding members 8. Guide groove 1 formed in the fourth folding member 8
1, which is movable along 1.
The guide piece 17 is a portion 1 along the guide groove 11.
A packaging film folding device for a packaging machine, characterized in that 9a is flat and cannot rotate relative to the third and fourth folding members 8 when moving along the guide groove 11. 2 The guide piece 17 has a fitting groove 19 on its outer periphery, and the side edge 11a of the guide groove 11 fits into this fitting groove 1.
9. A packaging film folding device in a packaging machine as set forth in claim 1 of the utility model registration filed under No. 9.