JPH0454886Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention is an edge folding device for a packaging machine that wraps box-shaped contents with wrapping paper, and more specifically, a box-shaped contents wrapped with wrapping paper. An upper folding guide is fixedly arranged on the transfer path where the contents are transferred horizontally, facing the lower flap of the overhanging end of the wrapping paper that protrudes in a rectangular cylindrical shape from the side where the contents are opened. The flap is folded up along the opening side, and a support guide that approaches and faces the side that opens downstream from this, and a lower folding guide that opposes the upper flap are each arranged to be vertically adjustable and move the contents. This invention relates to a device in which the upper flap is folded down to the outside while the lower flap is pressed against the opening side surface as the lower folding guides move up and down relative to each other.

<Prior Art> Conventionally, as disclosed in Japanese Patent Publication No. 58-48407, an elevator is disposed at the downstream end of a transfer path, and a supporting guide is placed between the elevators as an edge folding device for this type of packaging machine, as disclosed in Japanese Patent Publication No. 58-48407. are erected in parallel, a horizontal gap is formed between the upper end surface of these support guides and the lower folding guide, and after folding up the horizontally protruding lower flap, the contents are transferred onto the elevator, The horizontally protruding upper flap enters the horizontal gap, and then, as the elevator ascends, the upper flap is folded down to the outside of the lower flap pressed against the opening side by the support guide.
When the height dimension of the contents is changed, some types adjust the support guide and the lower folding guide up and down to align the horizontal gap between them with the height position of the upper flap. .

On the other hand, when packaging box-shaped contents, the tip of the bottom flap is folded up to a level lower than the top of the contents, depending on the protruding length of the overhanging end of the wrapping paper, and then the tip of the top flap is folded up to cover the contents. In the case of so-called side folding, in which the flap is folded higher than the bottom edge of the contents, the tip of the bottom flap is folded up higher than the top edge of the contents, and then the tip of the top flap is folded down lower than the bottom edge of the contents, along the bottom of the contents. There is also a case of so-called bottom folding.

<Problem to be solved by the invention> However, in the edge folding device of such a conventional packaging machine, the height position of the support guide corresponds to the height dimension of the contents while being separated from the upper folding guide. As the height of the contents increases, there will be a large drop between the top edge of the upper folding guide and the height of the upper edge of the support guide. There is a problem in that the lower flap that has been scooped up gets caught, and the tip of the lower flap cannot be guided to the upper end surface of the support guide, making it impossible to fold it up smoothly.

In particular, in the case of so-called bottom folding, in which the tip of the folded-up lower flap needs to reach the upper end surface of the support guide, the protruding length of the lower flap becomes longer, making it more likely to catch on the drop, causing the support guide There is a problem in that the tip of the lower flap cannot be guided to the upper end surface of the flap.

Therefore, in order to prevent this, a large number of upper folding guides with different height dimensions of the upper end positions are prepared in advance, and each time the height position of the upper end surface of the support guide changes due to a change in the height dimension of the contents, A suitable upper folding guide has been selected and replaced, but in this case, there is a problem that not only is this replacement work troublesome and inconvenient to use, but also work efficiency is significantly reduced.

In view of such conventional circumstances, the present invention aims to fold up the lower flap to the upper end surface of the support guide regardless of the height position of the support guide.

<Means for Solving the Problems> The technical means taken by the present invention to solve the above problems is to construct a link member at the upper part of the support guide on the upstream side in the direction of content transfer from the upper folding guide.
This is characterized in that the support guides are connected to each other so that they can be adjusted vertically.

<Function> According to the above-mentioned technical means, the present invention provides a link member from the top folding guide to the upper part of the upstream side of the support guide, and connects the support guide so as to be vertically adjustable, thereby increasing the height of the contents. When the size is high, the link member tilts upward, and the lower flap scooped up by the upper folding guide rides on the link member and is gradually lifted, and its tip is guided to the upper end surface of the support guide.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

In this embodiment, as shown in FIG. 1, as the elevator d rises, the box-shaped contents A abut against the wrapping paper B and are wrapped in an inverted U-shape, with the bottom folding plate e constituting the upstream end of the transfer path a. After the downstream end B' of the wrapping paper B is folded along the bottom surface of the contents A by the horizontal movement of B'' is folded along the bottom surface of the content A to complete the wrapping process, and at the same time one of the pair of horizontal folding guides 11 connected in the left and right direction on the pusher b, With the contact movement of the other horizontal folding guide 12 fixedly arranged, each overhanging end
While folding both side flaps B ₁₄ and B ₁₃ of B ₁ along the side A ₁ where contents A opens, open the top flap.
Fold B ₁₁ upwards and lower flap B ₁₂
After that, the contents A are pushed to the downstream side by a pusher plate c connected to the pusher b.

On the transfer path a, the other horizontal folding guide 12
On the more downstream side, return guide 1, upper folding guide 2,
A pair of support guides 3a and a pair of lower folding guides 3 are sequentially arranged in the left and right directions on the same plane as the side surface _A1 where the content A opens.

The return guide 1 is installed horizontally so that the lower surface of the plate material extending in the transport direction is at the same height as the upper surface of the contents A, and its upstream end rises approximately vertically, and gradually moves toward the downstream side. Opening side A ₁
The upper flap _B11 , which has been folded upward by the horizontal folding guides 11 and 12, is folded back horizontally by the horizontal folding guides 11 and 12.

Also, below the return guide 1, there is an upper flap.
A support rod 5 extending in the transfer direction is installed horizontally through a gap through which B ₁₁ can pass, and an upper flap B ₁₁ is placed on this support rod 5.
By supporting the upper flaps B ₁₁ and B 11 , the upper flaps B 11 and B ₁₁ are prevented from hanging down, and these support rods 5 and the return guide 1 are linked with a support guide 3 a and a lower folding guide 3 to be described later. When the height of the support guide 3a is moved up and down, the heights of the support rod 5 and the return guide 1 are also moved up and down accordingly.

The upper folding guide 2 is located below the return guide 1 and is erected on the transfer path a.The upper folding guide 2 is formed into a right triangular shape with an upwardly inclined upstream edge, and the upper end of this upwardly inclined upstream edge. The position is in the middle of the highest height of contents A, and a protruding piece 2 is placed on the upstream edge.
a, and a link member 4 is constructed from the upper part on the downstream side to the upper part on the upstream side of the support guide 3a.

The link member 4 is configured by rotatably pivoting at least two or more link ends, and in the illustrated example, a short link 4a shorter than the height of the upper folding guide 2, and a short link 4a shorter than the height of the upper folding guide 2; A mounting plate 2b on which a long link 4b having the same length as the dimensions is pivoted, and the tip of the short link 4a projects from the inner surface of the upper folding guide 2.
The tips of the long link rods 4b are rotatably attached to the upper part of the upstream side of the support guide 3a.

Note that the link member 4 is not limited to what is shown in the drawings, and the length and number of link rods are arbitrary.

The support guide 3a is erected across the elevator 6 disposed at the downstream end of the transfer path a, its inner surface approaches the side surface _A1 where the contents A open, and its upper end surface 3b faces the support rod 5. The support rod 5 is continuously connected to the downstream side.
Position it horizontally at approximately the same height as the top surface.

The lower folding guide 3 is formed horizontally on the lower end surface of the support plate 3' which is provided above the support guide 3a in the left and right direction, and is continuous to the downstream side of the return guide 1 and extends from the lower surface of the downstream end of the return guide 1. A horizontal gap 3c is formed between the support guide 3a and the upper end surface 3b of the support guide 3a.

Further, the support guide 3a and the lower folding guide 3 are arranged to be movable in the vertical direction without changing the dimension of the gap 3c between them, and by rotating an operation handle (not shown), the gap 3c can be moved freely. Adjust the height position to match the height position of A ₂ on the top surface of content A.

At this time, the links 4a and 4b of the link member 4 move as the support guide 3a moves up and down, so that the connection state between the upper folding guide 2 and the support guide 3a is maintained, and at the same time, the return guide 1 and the The height position of the support rod 5 is also adjusted up and down following the gap 3c.

A latch 7 with a horizontal upper surface is disposed above the support plate 3' so as to be freely retractable into the hoistway 6a of the elevator 6. It is tilted so as to protrude into the hoistway 6a, and is constantly pressed in the direction of protruding into the hoistway 6a by an elastic member 7b such as a spring.

Next, the operation of the edge folding device of such a packaging machine will be explained.

First, the content A is pushed downstream by the pusher plate c, and a lower flap that protrudes horizontally in the left-right direction
When B ₁₂ and B ₁₂ hit the upper folding guides 2 and 2,
As shown in Fig. 1 and Fig. 2, the upper folding guides 2, 2
along the protruding pieces 2a, 2a of the lower flap _B12 ,
B ₁₂ is scooped up, and the link member 4,
Leads to 4.

As shown in the figure, in the case of so-called bottom folding in which the tips of the lower flaps B ₁₂ , B ₁₂ are folded higher than the upper surface A ₂ of the contents A, the lower flaps B ₁₂ , B ₁₂ that have been scooped up are folded over the link members 4 , 4 . The top is gradually lifted up, and each tip is attached to the support guide 3a,
The contents A are guided to the upper end surfaces 3b, 3b of 3a.
It is folded up along the opening sides A ₁ and A ₁ .

At the same time, the upper flap is folded upward.
B ₁₁ , B ₁₁ hit the return guides 1, 1 and are folded back horizontally, and these upper flaps B ₁₁ ,
Folded-up bottom flap B ₁₂ , B ₁₂ on the bottom side of B ₁₁
The tip of is folded over.

Then this folded upper flap B ₁₁ ,
B ₁₁ and the tips of the lower flaps B ₁₂ and B ₁₂ are located at horizontal gaps 3c and 3c between the upper end surfaces 3b and 3b of the support guides 3a and 3a and the lower folding guides 3 and 3, as shown in FIGS. 3 and 4. The lower flaps B ₁₂ , B ₁₂ folded up by the support guides 3 a , 3 a are pressed against the open side surfaces A ₁ , A ₁ of the contents A.

When the pusher plate c finishes pushing the contents A and stops on the elevator 6, the elevator 6 rises and the upper flap held horizontally opens.
The tips of B ₁₁ , B ₁₁ and the lower flaps B ₁₂ , B ₁₂ hit the lower folding guides 3, 3, and as a result, the tips of the upper flaps B ₁₁ , B ₁₁ and the lower flaps B ₁₂ , B ₁₂ open the opening of the contents A. It is folded down along the side surfaces A ₁ and A ₁ .

Then this folded down upper flap B ₁₁ ,
The tips of B ₁₁ and lower flaps B ₁₂ and B ₁₂ are connected to the support plate 3',
When _the upper surface A ₂ of the contents A hits the inclined inner surfaces 7a, 7 of _the latches 7, 7, it is pushed out of the hoistway 6a. move and pass.

Between these latches 7 and 7 is the bottom surface A ₃ of content A.
After passing, the latch 7, as shown in FIG.
7 protrudes, and the tips of the upper flaps B ₁₁ and B ₁₁ are folded in along the bottom surface A ₃ of the contents A by the protrusion of the latches 7 and 7, and glued with the glue applied in advance to the inner surface of the tips of the upper flaps B ₁₁ and B ₁₁ . At the same time, the packaged contents A are supported on the latches 7, 7.

On the other hand, what is shown in FIG. 6 is another embodiment of the present invention, in which the link member 4 is constituted by a single link 4c, and the transport direction of the contents A closed in the upper folding guide 2 is shown in FIG. Insert link 4 into long slot 2c.
One end of the link 4c is slidably connected, and the other end of the link 4c is rotatably connected to the upper part of the upstream side of the support guide 3a, thereby connecting the upper end surface 3 of the support guide 3a.
By changing the height position of b, link 4c
One end slides through the elongated hole 2c, and the horizontal distance from the upper folding guide 2 to the upper end of the support guide 3a is kept constant.

Therefore, the upper folding guide 2 shown in FIG.
It is easy for the long hole 2c to become clogged with dirt or pieces of paper, causing malfunction, and if the inclination angle of the link 4c becomes steep, it becomes difficult for one end of the link 4c to slide. There is a problem in that the length must be increased, and the overall size of the device increases accordingly.

In contrast, the upper folding guide 2 of the embodiment shown above does not have a long hole, so malfunctions do not occur due to clogging with dust or pieces of paper, and the height position of the upper end surface 3b of the support guide 3a changes. However, the horizontal distance from the upper folding guide 2 to the upper end of the support guide 3a can be kept constant by simply changing the angle between at least two or more links 4a and 4b, and the overall size of the device can be avoided. do not have.

<Effects of the Invention> Since the present invention has the above configuration, it has the following advantages.

By constructing a link member from the upper folding guide to the upper part of the upstream side of the support guide and connecting the support guide so that it can be adjusted vertically, the link member can be tilted upward when the height of the contents is high.
The lower flap scooped up by the upper folding guide rides on the link member and is gradually lifted up, and its tip is guided to the upper end surface of the support guide, so regardless of the height position of the support guide, the lower flap is placed on the upper end surface of the support guide. It can be folded up.

Therefore, compared to conventional models in which the height position of the support guide moves up and down in accordance with the height of the contents while being separated from the upper folding guide, it is easy to replace even if the height of the contents increases. It can be folded up smoothly without any parts, making it easier to use and improving work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of the edge folding device of a packaging machine according to an embodiment of the present invention, showing the state in which the lower flap is being folded up, Fig. 2 is an enlarged plan view of the same part, and Fig. 3 is An enlarged side view showing the state of the lower flap after being folded up, FIG. 4 is a longitudinal sectional front view taken along the - line in FIG. 3, and FIG. FIG. 6 is a partially enlarged side view of an edge folding device of a packaging machine showing another embodiment of the present invention. A... Contents, A ₁ ... Side to open, B...
Wrapping paper, B ₁ ... overhanging end, B ₁₁ ... upper flap, B ₁₂ ... lower flap, B ₁₃ , B ₁₄ ... side flap, a ... transfer path, 2 ... upper folding guide, 3
...Lower folding guide, 3a...Support guide, 4...
link member.

Claims (1)

[Scope of utility model registration request] An upper folding guide is fixed on a transport path for horizontally transporting box-shaped contents wrapped in wrapping paper, facing the lower flap of the overhanging end of the wrapping paper that protrudes in a rectangular cylindrical shape from the side where the contents open. As the contents are transferred, the lower flap is folded up along the opening side, and the support guide that approaches and faces the side that opens downstream from this, and the lower folding guide that faces the upper flap are folded up and down, respectively. An edge folding device of a packaging machine that is arranged to be freely adjustable and folds down the upper flap outward while pressing the folded-up lower flap against the opening side as the content and the lower folding guide move up and down relative to each other. An edge folding device for a packaging machine, characterized in that a link member is installed above the upper folding guide on the upstream side in the content transfer direction of the support guide to connect the support guide so as to be vertically adjustable.