JPH07106731B2 - Triangular folding device for the top of the container - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for bending a top triangular ear of a rectangular parallelepiped container filled with fluid food or the like so as to be overlapped with a body below the container.

2. Description of the Related Art As a container of this type, various types are known, for example, a container including a pair of folding members arranged on both sides of a transfer path of a container transfer conveyor. Both of the folding members are parallel plate-shaped members arranged opposite to each other with a gap that allows the body of the container conveyed by the conveyor to enter between them, and their lower edges are seen from the side of the container. It is inclined so as to cross the upper edge of the body. Then, by conveying the container between the folding members by the conveyor, the triangular ears can be bent downward by the lower edges of the folding members when passing through the folding members.

The problem with the above-mentioned device is that when the triangular ears are bent, this is done only by the bending members, and since the container itself is easily deformed to some extent, the degree of bending varies slightly from container to container. The finish is not good. Also, when bending, the triangular ears are deformed so that they can be handled,
Triangular ears may be scratched.

MEANS FOR SOLVING PROBLEMS A top triangular ear folding device for a container according to the present invention includes an elevating member arranged above a conveying path of a container conveying conveyor, and a hanging member provided on the elevating member and arranged between them. Between a pair of triangular-ear bending members provided with a gap corresponding to the distance at which the bases of the pair of triangular ears protruding laterally from the top of the container conveyed by the conveyor are separated from each other, and between the triangular-ear bending members. A container top pressing member that is arranged,
A vertical bar provided upright on the container top pressing member and having an upper end penetrating the elevating member and projecting upward, a stopper fixed to an upward projecting end of the vertical bar, an elevating member and a container top pressing member. And a compression coil spring interposed between the two and fitted to the vertical rod.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

First, before describing the device according to the present invention, the container will be described. As shown in FIG.
Is a prismatic tubular shape having a square cross section as a whole, and a portion (12) (hereinafter referred to as a body portion forming portion) which is a body portion of the container (11) at the center in the height direction, Department components (12)
Container (11) with an upper fold line (13) through the upper fold line (13)
The top part of the (15) (hereinafter referred to as the top part),
It is composed of a bottom part (16) (hereinafter referred to as a bottom part) of the container (11) which is connected to the lower end of the body part (12) via a lower fold line (14). It should be noted that the container (11) is entirely made of one sheet of a material mainly made of a laminated material, and a thermoplastic synthetic resin layer is formed on both inner and outer surfaces thereof, though not described in detail because it is not directly related to the present invention. ing. The top and bottom components (15) (16) are provided with fold lines (17) (18) in a predetermined pattern for facilitating folding. The top part (15) is composed of four side walls (19) to (22), and one of the side walls (19) is provided with an oval mouth (23). In the container (11) shown in FIG. 5, the bottom part (16) is flatly folded and closed, and the drinking piece (2
3) closed, filled with contents, top component (1
5) folded flat so that the pair of triangular ears (24) project laterally and the sealing ridges (25) that extend so that both ends reach the vertices of both triangular ears (24) project upward. ,
The sealing rim (25) is heated, the sealing rim (25) is crimped in a state where the inner surfaces of the sealing rim (25) are overlapped with each other, and the pair of triangular ears (24) is bent into a generally vertical section. Later, with the device according to the invention, the triangular ears (24) are bent downward at their base to the state shown in FIG. The container (11) shown in FIG. 6 goes through the respective steps thereafter, and finally becomes a rectangular parallelepiped as shown in FIG. 7.

A packaging machine including the device according to the present invention is provided with a container transfer conveyor (31) as shown in FIG.

In this specification, front and rear means the container (1) by the conveyor (31) with reference to the conveying direction of the conveyor (31).
1) is sent to the front (the left side in Fig. 4),
The opposite direction is called back, and the left and right are called front.

A rotating body having a radial mandrel and a device group for collapsing and closing the bottom part (16) in a flat manner are arranged above the starting end, that is, the rear end of the conveying path of the container conveying conveyer (31). However, the description of these is omitted. Along the conveying route of the conveyor (31), the drinking mouth sealing device (32) and the filling device (3
3), Top folding device (34), Top heater (35), Top sealing device (36), Branding device (37), Top triangular ear pre-folding device (38), Top triangular ear heater (39), Top triangular ear Folding device (40) and top triangular ear crimping device (5
0) is arranged.

Of the respective device groups, the components other than the container transporting conveyor (31) and the top triangular ear folding device (40) are not directly related to the gist of the present invention, and therefore description thereof will be omitted.
In addition, each of the above-mentioned devices is configured to simultaneously perform a required packaging operation on the two containers conveyed by the conveyor.

As shown in FIG. 2 and FIG. 3, the container transport conveyor (31) is provided with a pair of parallel horizontal endless chains (41) at regular intervals in the length direction of the chains (41). And a holder (42) having an L-shaped horizontal cross section, which is mounted outward. When the holder (42) approaches the feed side movement path, two are mounted on each chain (41). Further, four holders (42) hold the container (11) at each corner of the container body constituting part (12) in such a state. With the container (11) held in the holder (42), the top part (15) of the container projects above the holder (42), and the drinking spout (23) faces forward. Further, a rail (43) for receiving and guiding the bottom of the container (11) is arranged in parallel below the feed side movement path of the container holder (42).

As shown in FIG. 1 to FIG. 3, the top triangular ear folding device (40) includes an elevating member (51) arranged above the conveying path of the container conveying conveyor (31) and an elevating member (51). Corresponding to the distance at which the bases of a pair of triangular ears (24) protruding laterally from the top of the container (11) provided in a hanging shape and conveyed by the conveyor (31) between them are separated from each other. A triangular ear bending member (52) provided with a gap, a container top pressing member (53) arranged between both triangular ear bending members (52), and an upright shape on the container top pressing member (53). A vertical bar (54) that is provided and has its upper end penetrating the elevating member (51) and projecting above it, a stopper (55) fixed to the upward projecting end of the vertical bar (54), and an elevating member ( Compression between the (51) and the container top holding member (53) and fitted on the vertical rod (54) Yl consists spring (56).

The lifting member (51) is held by the conveyor (31) 2
It is in the form of a horizontal rectangular flat plate having a size capable of covering one container (11), and is attached to the piston rod (58) of the vertically downward fluid pressure cylinder (57) arranged above it. The fluid pressure cylinder (57) is a container conveyor (31).
It is supported by the tip of an arm (60) provided on the upper end of a support column (59) standing to the right of the transfer path so as to project above the transfer path. Triangular ear bending member (52)
A vertical plate extending in the front-rear direction, having a length capable of simultaneously operating two containers (11) held by a conveyor (31) and at both left and right edges of the elevating member (51). It is bolted. Although not shown, a passage for circulating cooling water is provided inside the triangular-ear bending member (52). The lower half of the height of the rear end surface (61) of the triangular ear bending member (52) is formed in an inclined shape which becomes higher as it goes backward, and its lower surface (62) is horizontal and the lifting member (51) is It is formed so as to be located at the upper limit of the lifting stroke and to have the same height as the height of the upper end of the body forming part (12) of the container (11). The container top pressing member (53) is a horizontal rectangular plate having a size slightly smaller than the top of the container (11), the number of which is two, and the conveyor (31).
They are lined up front and back at the same intervals as the container (11) held by. In the normal state, the lower surface (63) of the container top pressing member (53)
Is at the same height as the lower surface (62) of the triangular ear bending member (52). Vertical bar (54), stopper (55) and spring (56)
Two are provided for each container top pressing member (53). The stopper (55) has an annular shape and is fitted and fixed to the vertical rod (54).

It is assumed that the lifting member (51) is at the upper limit of its lifting stroke, as in the state shown in FIGS. 2 and 3.
When the conveyor (31) is driven in this state, the triangular ears (24) of the container (11) held by the conveyor (31) are positioned below the triangular ears bending member (52) and the triangular ears of the container (11). The part inside the ears (24) enters below the container top pressing member (53). At the time of this approach, even if the triangular ears (24) and the sealing edges (25) extending above the triangular ears (24) are not completely horizontal and slightly lifted, both of them are inclined after the triangular ear bending member (52) is inclined. Guided by the end face (61), it enters smoothly. And hydraulic cylinder (5
When the piston rod (58) of 7) is projected and the elevating member (51) is lowered, the triangular ear folding member (52) and the container top pressing member (53) simultaneously descend, but the container The top pressing member (53) is stopped when it comes into contact with the top of the container (11). When the lifting member (51) continues to descend, the compression coil spring (56)
When the container is compressed, the container top pressing member (53) is pressed against the container (11) by its reaction force, and only the top triangular ear bending member (52) further descends. Then, when the lifting / lowering member (51) reaches the lower limit of its lifting / lowering stroke, as shown in FIG. 1, the triangular ear (24) and the body part (12) of the container (11) and the triangular ear bending member (52). ) It is completely faced down when sandwiched.

EFFECTS OF THE INVENTION According to the present invention, when the triangular ears are bent, the container top pressing member presses the container in an elastic state from above, so that the container itself is difficult to deform, and in this state, the triangular shape Since the triangular ears are bent by the ear bending member, the triangular ears can be bent with a good finish without causing variations in each container.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a perspective view including a fragmented sectional view showing a main part of an apparatus according to the present invention, FIG. 2 is a side view, FIG. 3 is a front view, and FIG. FIG. 5 to FIG. 7 are side views of the entire packaging machine including the device according to the invention, and FIGS. 5 to 7 are explanatory views showing the manufacturing process of the container. (11) ... Container, (12) ... Body part, (24) ... Triangular ear,
(31) ... conveyor, (51) ... elevating member, (52) ... triangular tab bending member, (53) ... container top pressing member, (54) ... vertical bar, (55) ... stopper, (56) ... spring.

Claims (1)

[Claims] 1. An elevating member (51) arranged above a conveying path of a container conveying conveyor (31), and a descending member provided on the elevating member (51) and conveyed by the conveyor (31) between them. Triangular ears folding member (52) provided with a gap corresponding to the distance between the bases of a pair of triangular ears (24) protruding laterally from the top of the container (11) to be formed; The container top pressing member (53) arranged between the ear bending members (52) and the container top pressing member (53) are provided upright and the upper end penetrates the elevating member (51) and is located above the container. The protruding vertical bar (54), the stopper (55) fixed to the upper protruding end of the vertical bar (54), the vertical member interposed between the lifting member (51) and the container top pressing member (53). A triangular fold on the top of the container consisting of a compression coil spring (56) fitted on a rod (54) Bending apparatus.