JPH0754091Y2 - Packaging material feeding mechanism of packaging device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention is for transferring an encapsulating material in which an air intake chamber is formed inside a feeding path of the encapsulating material that is orthogonal to the transfer path of the box-shaped contents. The belt conveyors are arranged side by side along both side edges of the encapsulating material, and the box-shaped contents are adsorbed and held in a tension state through a large number of through holes formed in these belts at substantially the center of the encapsulating material. The present invention relates to a packaging material feeding mechanism of a packaging device that abuts and encloses a packaging material.

<Prior art> Conventionally, as disclosed in, for example, Japanese Utility Model Publication No. 56-44652 and Japanese Patent Publication No. 57-60218 as an encapsulating material feeding mechanism of this type of packaging apparatus, the intake chamber of each belt conveyor is omitted. It is divided and formed over the entire length, and an intake port is formed in the sliding contact surface with the belt, and both side edges of the packaging material are adsorbed through the intake port and the through hole of the belt, and the packaging material is tensioned. In a circular shape, the encapsulating material is fed out by a predetermined length by driving both belts and made orthogonal to the transfer path, and then the front surface of the box-shaped contents is abutted and pushed into substantially the center of the encapsulating material to push the encapsulating material. One in which both side edges of the packaging material are peeled off from both belts and wrapped in a U-shape, and the box-shaped contents are wound in such a manner that both side edges of the packaging material project in a square tubular shape, respectively. is there.

<Problems to be solved by the invention> However, in such a conventional packaging material feeding mechanism of a packaging device, a box-shaped content is struck in a direction in which it is peeled from a belt to the approximate center of the packaging material. Although force is applied, both edges of the encapsulation material are applied in the opposite direction from the adsorption, so the front edge of the protruding end of the rectangular tubular shape moves backward from the extension surface of the front of the box-shaped contents. Easier to bend, and the more flexible the material of the encapsulation material is, the more the bending will appear. As a result, the contents of each overhanging end of the rectangular cylinder protruding from both end surfaces of the box-shaped contents in the subsequent process When folding along the end face of the object, there is a problem that a folding failure is likely to occur and the finish is poor.

Therefore, it is conceivable that the suction pressure of each of the intake chambers is reduced to weaken the suction force of the encapsulating material so that the encapsulating material is easily peeled off at the time of hitting the box-shaped contents. When the encapsulating material is transferred by the belt, the end of the encapsulating material is easily turned over, and the encapsulating material itself bends and is peeled off from the belt, so that the entire encapsulating material cannot be held in a tension state.

In view of such conventional circumstances, the present invention has an object to increase the suction when transferring the encapsulating material and weaken the suction when the box-shaped content hits.

<Means for Solving the Problems> The technical means taken by the present invention to solve the above problems is to divide the intake chamber of each belt conveyor into a plurality of parts in the feeding direction of the encapsulating material, and to intake these divided chambers. Each of the sources is connected to the source via a separate intake pipe so that each flow rate can be adjusted, and at least a division chamber corresponding to the passing height of the box-shaped contents is provided with a valve that can be opened and closed so as to communicate with the atmosphere. To do.

<Operation> According to the above technical means, the present invention separately adjusts the intake pressure from the intake source to each of the divided chambers in response to the material change of the encapsulating material and the dimensional change of the box-shaped contents. , The valve is closed at the time of transferring the encapsulating material to adsorb the encapsulating material on the entire surface of the belt, and the valve is opened when the box-shaped contents pass so that at least the dividing chamber corresponding to the passing height of the box-shaped contents is exposed to the atmosphere. By being released,
The encapsulating material is peeled off from the belt smoothly without any resistance when the box-shaped contents hit the end.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, as shown in FIGS. 1 and 2, a wrapping material (A) made of, for example, a flexible film, which is wound in a roll shape, is intermittently driven by a feeding roller (R) (R) to intermittently drive a belt conveyor (1). ), The tip is adsorbed to the belt conveyor (1), and the cutter (C)
After cutting to a predetermined length in (C), the encapsulating material (A) is transferred downward to a predetermined height position along a feeding path (A ₁ ) formed in the vertical direction by intermittent driving of the belt conveyor (1). In addition, the pusher (P) forms the box-shaped contents (B) in the horizontal direction and pushes the box-shaped contents (B) at appropriate intervals along the transfer path (B ₁ ) to hold them in a tension state on the belt conveyor (1). It is intended to abut the approximate center of the encapsulating material (A).

Each belt conveyor (1) has pulleys (1b) (1b) axially mounted parallel to each other at the upper and lower ends of the device frame (1a), and a large number of through holes (1c) are provided over both pulleys (1b) (1b). ₁ ) ... is wound around a belt (1c) perforated at appropriate intervals in the circumferential direction, and either or both of the pulleys (1b) and (1b) are rotatably driven so that the belt (1c) is rotated. It has a conventionally known structure that rotates while slidingly contacting the outer periphery of the frame (1a).

In the case of the present embodiment, a long belt conveyor (1) orthogonal to the transfer path (B ₁ ) is erected in parallel with both side edges of the encapsulating material (A) in the width direction, respectively. 2 short belt conveyors (1 ') between different belt conveyors (1) (1)
The lower end surface and the transfer path of the short length of the belt conveyor erected parallel to each number equal intervals (1 ') (1') (B 1) a box-like contents between the upper surface (B) space for passage (B ₂ ) is formed and these belt conveyors (1) (1 ') (1')
The upper end pulleys (1b) of (1) are arranged in a straight line in the horizontal direction and the drive shafts (1b ₁ ) are inserted therethrough so that the belts (1c) ...

Each of the device frames (1a) is formed in a hollow shape, and an intake port (1a ₁ ) is formed in either one of the sliding contact surfaces of the belt (1c) to define an intake chamber (1d) inside, An air intake pipe that divides the air intake chamber (1d) into a plurality of parts in the feeding direction of the encapsulating material (A), that is, in the vertical direction, and connects these divided chambers (1d ₁ ) to an air intake source (not shown) such as a compressor. Connect (2) respectively.

In the case of this embodiment, the intake chambers (1d) (1d) of the long belt conveyors (1) (1) facing both side edges of the encapsulating material (A).
A partition wall (1d ₂ ) is installed inside each of them to form 3 division chambers (1d ₁ ) in the vertical direction, and the vertical dimensions of the division chambers (1d ₁ ) (1d ₁ ) located in the upper and lower half Is approximately equal to the passing height of the box-shaped contents (B).

The partition walls (1d ₂ ) are provided so as to be immovable in the vertical direction with respect to the device frame (1a) as shown in the figure, or are provided so as to be movable in the vertical direction so that the height of the box-shaped contents (B) changes. Accordingly, the vertical dimension of each division chamber (1d ₁ ) may be adjustable.

And all of these division chambers (1d ₁ ) ... Or at least division chambers (1d ₁ ) corresponding to the passing height of the box-shaped contents (B)
Valves (3) communicating with the atmosphere are provided at (1d ₁ ) so as to be openable and closable.

In the case of the present embodiment, between the division chambers (1d ₁ ) (1d ₁ ) located at the upper and lower middles of the long belt conveyor (1) ( ₁ ) and the intake pipes (2) (2) connected to them. , The valve bodies (3a) are respectively arranged, the cylindrical valve bodies (3b) are rotatably fitted in the valve bodies (3a), and the valve bodies (3a) communicate with the respective division chambers (1d ₁ ). Hole (3a ₁ ) that connects to each intake pipe (2) (3a ₂ )
And a hole (3a ₃ ) communicating with the atmosphere is radially formed, and the above hole (3a ₁ ) is formed in the valve body (3b) and the other two holes (3a ₂ ).
A passage (3b ₁ ) communicating with either one of (3a ₃ ) is drilled,
Further, a drive unit (3c) such as an air cylinder that rotationally drives the valve body (3b) is continuously provided.

The drive unit (3c) is operated controlled by a controller (not shown), the space (B ₂₎ a box-like contents (B) by rotating only the valve (3b) when it passes through the divided chambers (1d ₁ ) Through the hole (3a ₁ ) and the atmosphere (3a ₃ ) to the atmosphere, and otherwise to the divided chambers (1d ₁ ) to the hole (3a ₁ ) and the intake pipes (2). It is controlled to communicate with the communicating hole (3a ₂ ).

In addition, each intake pipe (2) is provided with a flow control valve (2a) having a conventionally well-known structure in the middle thereof, and the flow control valve (2a) is operated to open each intake pipe (2). Of the envelopes (1d ₁ ) and the intake chambers (1d) (1d) of the short belt conveyors (1 ') (1'), and the material of the encapsulating material (A) and the box The optimum intake pressure is adjusted based on factors such as the outer dimensions of the content (B), and the intake pipes (2) are integrated at their proximal ends to communicate with the intake source.

Next, the operation of the wrapped material feeding mechanism of the packaging device will be described.

First, in a normal state, the valve body (3b) of each valve (3) corresponds to at least the passing height of the box-shaped contents (B) in the division chamber (1
Since d ₁ ) (1d ₁ ) communicates with the intake pipes (2) (2), all of the division chambers (1d ₁ ) ... and the intake chambers (1d) of the short belt conveyors (1 ′) (1 ′) (1d) is an intake state, the drive shaft (1b ₁₎ belt conveyor with the rotation of (1) (1 ') (1') (1) of the belt (1c) ... the encapsulant (a) tension It is adsorbed and held in the shape of and is fed downward.

When the encapsulating material (A) is transferred to a predetermined position and stands still orthogonal to the transfer path (B ₁ ), and the box-shaped content (B) pushed by the pusher (P) passes through the space (B ₂ ). At the same time, the valve body (3
b) rotates to block at least the intake air into the divided chambers (1d ₁ ) (1d ₁ ) corresponding to the passing height of the box-shaped contents (B), and is released to the atmosphere to lower the intake pressure.

As a result, when the front surface of the box-shaped contents (B) hits against the encapsulating material (A) and is pushed into the encapsulating material (A), the encapsulating material (A) bends into a U-shape without resistance, and the encapsulating material (A) is curved. To wrap.

After that, the pusher (P) retracts and the above-mentioned operation is repeated thereafter, and the encapsulating material (A) encased in a U shape has box-shaped contents (B) at both ends thereof in a later step. Then, it is folded along the rear surface and heat-welded by the heater (H) to finish the body winding.

In the embodiment shown above, the feeding path (A ₁ ) of the encapsulating material (A) was formed in the vertical direction to extend the encapsulating material (A) downward, but the present invention is not limited to this, and the box-shaped contents As long as it is orthogonal to the transfer path (B ₁ ) for the article (B), the feeding direction of the encapsulating material (A) may be upward or sideways other than downward.

Further, the valve (3) communicating with the atmosphere is provided only in the division chambers (1d ₁ ) (1d ₁ ) corresponding to the passage height of the box-shaped contents (B), but the invention is not limited to this and may be provided as necessary. And other division room (1d ₁ )
It may be arranged in the intake chambers (1d) (1d) of the short belt conveyors (1 ') (1'). Further, the structure and arrangement position of the valve (3) are not limited to those described above, and any valve may be used as long as it has a similar operation.

<Effect of Device> Since the device of the present invention has the above-described configuration, it has the following advantages.

The intake pressure from the intake source to each division chamber is adjusted individually according to the material change of the encapsulating material and the dimensional change of the box-shaped contents, etc. When the box-shaped contents strike the box-shaped contents by adsorbing the encapsulating material and opening the valve when the box-shaped contents pass through, and opening the division chamber corresponding to at least the passing height of the box-shaped contents to the atmosphere. Since the encapsulating material can be smoothly peeled off from the belt without resistance, it is possible to strengthen the adsorption when transferring the encapsulating material and weaken the adsorption when the box-shaped contents collide.

Therefore, even if the material of the wrapping material is flexible, it has a square shape as compared with the conventional one in which forces act in opposite directions on the substantially central portion and both side edges of the wrapping material when hitting the box-shaped contents. The front edge of the tubular overhanging end does not fold backward from the extension of the front surface of the box-shaped contents, and the square tubular overhanging ends protruding from both end faces of the box-shaped contents in the subsequent process When folding along the end face, no bad folding occurs and the finish is good.

In addition, compared with the one in which the suction pressure of each intake chamber is reduced to weaken the suction force of the encapsulating material, the end of the encapsulating material does not turn up or peel off from the belt when the encapsulating material is transferred. The entire packaging material can be held in a tension state, and reliable encapsulation is possible.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an encapsulating material feeding mechanism of a packaging apparatus showing an embodiment of the present invention, showing a state before encapsulation.
The figure shows the same vertical side view, and Fig. 3 shows (III)-(III) of Fig. 1.
FIG. 4 is a partially enlarged cross-sectional plan view taken along the line, and FIG. 4 is a partially enlarged cross-sectional plan view showing when the atmosphere is open. A: Encapsulation material, A ₁ …… Feeding path B …… Box contents, B ₁ …… Transfer path 1 …… Belt conveyor, 1c …… Belt 1c ₁ …… Through hole, 1d …… Intake chamber 1d ₁ …… Split chamber, 2 …… Intake pipe 3 …… Valve

Claims (1)

[Scope of utility model registration request] 1. A belt conveyor for transferring an encapsulating material, in which an air intake chamber is partitioned and formed inside, is provided along a side edge of the encapsulating material on a feeding path of the encapsulating material that is orthogonal to a transfer path of the box-shaped contents. And a box-shaped content is struck by the box-shaped contents at approximately the center of the encapsulating material that is adsorbed and held in a tension-like manner through a large number of through holes formed in these belts. In the material feeding mechanism, the intake chamber of each belt conveyor is divided into a plurality in the feeding direction of the enveloped material, and these divided chambers are connected to the intake source via separate intake pipes so that the respective flow rates can be adjusted, and at least A packaging material feeding mechanism for a packaging device, wherein a valve that communicates with the atmosphere is provided in a divided chamber corresponding to the passing height of the box-shaped contents so as to be openable and closable.