JPH10181718A - Method for clamping and conveying bottomed carton in apparatus for conveying it straight and method for adjusting spacing before or behind clamping piece for holding bottomed carton in between - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method for clamping and conveying a bottomed carton, which method simplifies the constitution of an apparatus for conveying a bottomed carton straight, increase the manufacturing efficiency of the apparatus, and lower its production cost, as well as a method for adjusting the spacing before or behind the clamping piece. SOLUTION: A pair of endless chain conveyors 1A, 1B are laid in a manner of having the sides going in the same direction in parallel and side by side on the same plane, a conveyance rail 3 is set between the endless chain conveyors 1A, 1B, and a bottomed carton 6 is conveyed on the conveyance rail 3 by clamping pieces 5A, 5B (5) of carriers 4A, 4B, (4) provided at fixed intervals on each of the endless chain conveyors 1A, 1B. In conveying the carton, of the respective angles formed through twisting of the bottomed carton 6 in a naturally twisted state and through change of shape of a horizontal plane to a lozenge only the carries 4 which correspond to acute-angled parts (a) provided in the respective endless chain conveyors 1. The clamping piece 5 of these two carries 4 clamp the opposite angled parts of the bottomed carton 1 in executing the conveyance. Forward and backward spacing is adjusted by moving back and forth the clamping pieces 5 of the carries 4, which clamp the bottomed carton 6, mutually to the opposite direction by the same length.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to juice, sake,
During a series of steps of filling a liquid content while forming from a flat plate into a cubic or rectangular container (hereinafter referred to as a carton) having a square cross section or a rectangular cross section based on paper, such as a liquid seasoning, The present invention relates to a method for holding and transporting a bottomed carton in a straight-line transporting device.
Another invention relates to a method of adjusting a distance between front and rear holding pieces in order to hold a plurality of types of cartons having different dimensions.

[0002]

2. Description of the Related Art With respect to the formation of a container, a paperboard substrate is first processed into a tube shape, and then a tube body inserted into the arm is stopped when the turret having a radial arm called a mandrel is intermittently rotated. The bottom of the carton is formed by performing a molding process, and the formed bottomed carton is extruded downward from the arm and passed onto a straight transport line.

[0003] In this straight-moving conveyor, a pair of endless chain conveyors are arranged in parallel with the same advancing sides facing each other on the same plane, and a conveying rail is installed between the endless chain conveyors so as to correspond to each endless chain conveyor. Then, a set of front and rear carriers is attached at regular intervals in the transport direction, and each corner of the bottomed carton is sandwiched by the carrier holding pieces to carry straight forward.

The endless chain conveyor on each side is constructed in two stages, upper and lower, and holding pieces of the carrier are attached to the front and rear corresponding to the opposed endless chain conveyor, and each holding piece can hold the four corners of the bottomed carton. The carrier is attached to the upper and lower endless chain conveyors.

The distance between the endless chain conveyors is set so that each holding piece can hold each corner of the bottomed carton, front and rear carriers are attached to each endless chain conveyor, and the endless chain conveyor is intermittently transferred from the mandrel. Depending on the bottomed carton, a set of four carriers in front and behind is installed at regular intervals.

[0006] With this straight-ahead transport device, when the bottomed carton on the transport rail is intermittently transported and stopped,
Each process such as filling of the content liquid, folding of the upper end opening, fusion sealing, etc. is performed, and each processing / filling device or the like is provided at a fixed position at the stop position.

By the way, the carton to be transported straight has a bottom with a mandrel of the pre-process apparatus. However, this bottomed carton has insufficient corner treatment and has an open upper end. The higher the position, the more the shape is twisted and deformed into a rhombus shape. During transport, the carrier is clamped while being corrected into a rectangular shape by the clamping piece of the carrier.

[0008]

A method of clamping and transporting a bottomed carton in the above-described conventional straight-bottomed carton transporting apparatus is performed by clamping all four corners of the bottomed carton with clamping pieces of a carrier. Thus, the number of carriers is actually eight times or more the number of bottomed cartons being conveyed on the line, so that the positioning and mounting work in the production is very troublesome, and the number of parts is also large.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method of clamping and transporting a bottomed carton which can simplify the structure, increase the working efficiency in manufacturing, reduce the number of parts and reduce the manufacturing cost.

Another method according to the present invention is that the distance between the pair of endless chain conveyors and the distance between a pair of front and rear carriers of the conventional straight conveying device are determined by the size of the carton to be formed (plane shape, square or rectangular conveyance). The width is set in accordance with the width in the direction and the front-back distance), and most of the cartons of a specific size are fixed as dedicated machines.

Attempts have been made to provide devices that can accommodate several carton sizes. The width adjustment in this case can be coped with by making the supporting portion of the endless chain conveyor and the supporting column adjustable in the width direction, and can be made extremely easily technically.

On the other hand, the adjustment of the front-rear spacing of the carriers in the transport direction is not allowed to move the center position of the carton due to the relationship with the processing / filling equipment. Therefore, it is considered that the position adjustment of all the carriers is necessary. is there.

However, it is impractical to adjust all the carriers individually in terms of efficiency, and a method of attaching a cover for adjusting the thickness to the holding piece of the carrier has been considered. It takes time to procure and replace.

It is an object of the present invention to provide a method for quickly, easily and efficiently adjusting the front and rear carriers corresponding to a carton.

[0015]

According to the present invention, a method of clamping and transporting a bottomed carton according to the present invention is to arrange a pair of endless chain conveyors in parallel so that the same advancing sides of the pair of endless chain conveyors are opposed to each other on the same plane, and between the endless chain conveyors. When the conveyor rails are installed and the bottomed cartons on the conveyor rails are transported by the holding pieces of the carriers provided at regular intervals on each endless chain conveyor, the bottomed cartons are twisted in a natural state and the horizontal plane is deformed into a diamond shape. Of the formed corners, only the carrier corresponding to the acute corner is provided on each endless chain conveyor, and the opposite corners of the bottomed carton are conveyed by the holding pieces of the two carriers. It is assumed that.

Another aspect of the present invention is a method of adjusting the distance between the front and rear of the holding piece for holding the bottomed carton in the above method for holding and transporting the bottomed carton, wherein the holding piece of the carrier for holding the bottomed carton is used. Further, the endless chain conveyors are advanced and retracted by the same length in opposite directions to each other, positioned at the front and rear length of the bottomed carton, and then the apparatus is transported and driven.

In the case of a bottomed carton, a deforming force in the shape of a rhombus acts in a natural state, so that a sufficient clamping force can be obtained only by clamping the clamping piece while pushing the protruding acute angle portion back against the deformation action. Therefore, no trouble occurs in the clamping / transporting operation.

The length of the bottomed carton in the transport direction can be accommodated by changing the distance between the holding pieces of the two carriers. The distance between the front and rear of the carrier holding piece can be adjusted without changing the center position of the bottomed carton.

[0019]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a simplified plan view for explaining the method of the present invention, in which a pair of endless chain conveyors 1 are shown.
A and 1B are installed in parallel on the same plane with an interval,
The tip sprocket 2B is connected to a drive source and positively rotated so that the chain conveyors 1A and 1B intermittently rotate from the base to the tip from the base between the base sprocket 2A and the tip sprocket 2B.

A transport rail 3 is provided between the endless chain conveyors 1A and 1B, and each endless chain conveyor 1A,
The carriers 4, 4,... Are attached to the 1B at regular intervals so as to correspond to each other on the opposing surfaces. Carrier 4, 4
... have clamping dies 5, 5, ... having a flat L-shaped height for clamping the corners of the bottomed carton 6.

On the other hand, since the bottomed carton 6 is formed by bending a flat plate made of paper as a base material, the bottomed carton 6 is twisted when the upper end is open, so that the horizontal plane cannot be accurately maintained in a rectangular shape. As shown in the figure, it is deformed into a diamond shape as it goes upward.

In order to correct the deformation of the rhombus into a rectangular shape and hold it with the holding piece 5, the holding pieces 5A and 5B are set in a positional relationship corresponding to the acute angles A and A of the rhombus, and the carriers 4A and 4B are set. 4B for each endless chain sprocket 1A, 1B
Is installed at regular intervals.

Accordingly, the diamond-shaped deformation of the bottomed carton 6 is corrected to a rectangular shape and the diamond-shaped cartons 6 are clamped by the holding pieces 5A and 5B. Thus, the bottomed carton 6 can be sufficiently clamped and conveyed even if there is no clamping piece at the obtuse angle part B (FIG. 3).

FIG. 4 shows the adjusted positional relationship between the carriers 4A and 4B and the holding pieces 5A and 5B corresponding to the two types of bottomed cartons 6A and 6B. Bottomed carton 6A, 6
The center position 7 of B is adjusted by moving the carriers 4A and 4B back and forth in the opposite direction by the same length because they cannot be moved in relation to the equipment that performs the various steps during transportation.

To adjust the position of the holding pieces 5A, 5B, the endless chain conveyor 1 with the carriers 4A, 4B attached thereto.
The endless chain conveyors 1A and 1B can be easily adjusted by individually driving the endless chain conveyors 1A and 1B. Further, in the conventional configuration, the drive of both endless chain conveyors 1A and 1B is obtained from the same drive source, but the individual endless chain conveyors 1A and 1B are independently rotated by operating a clutch during transmission. It can be advanced and retreated.

[0026]

As described above, according to the present invention, the number of carriers having the holding pieces is half that of the conventional apparatus, and the same operation and effects as those of the conventional apparatus can be obtained. As a result, the working efficiency can be improved, the apparatus can be simplified, and the manufacturing cost can be reduced.

Further, since only two holding pieces and a carrier for holding the bottomed carton are required and can be attached to each endless chain conveyor, only the individual rotation of the endless chain conveyor makes the front and rear length of the bottomed carton longer. The corresponding holding pieces can be easily positioned and moved back and forth in the opposite direction by the same length, so that the center position of the bottomed carton is not affected.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the method of the present invention.

FIG. 2 is a perspective view of a bottomed carton.

FIG. 3 is a plan view showing a relationship between a bottomed carton and a holding piece.

FIG. 4 is a plan view of a main part before and after adjustment.

[Explanation of symbols]

 Reference Signs List 1A, 1B Endless chain conveyor 2A, 2B Sprocket 3 Transport rail 4 Carrier 4A, 4B, Carrier 5 Holding piece 5A, 5B, Holding piece 6 Bottom carton 6A, 6B Bottom carton 7 Center position A Sharp corner B Obtuse corner

Claims (2)

[Claims] 1. A carrier in which a pair of endless chain conveyors are arranged in parallel with the same advancing sides facing each other on the same plane, a transfer rail is installed between the endless chain conveyors, and a fixed interval is provided on each endless chain conveyor. When transporting the bottomed carton on the carrier rail with the holding pieces, the bottomed carton is naturally twisted and the horizontal plane is deformed into a diamond shape. Narrowed and transported bottomed cartons in a bottomed carton straight-line transport device, which is provided on each endless chain conveyor, and grips and conveys opposite corners of the bottomed carton with the holding pieces of these two carriers. how to. 2. A method of clamping and transporting a bottomed carton according to claim 1, wherein the clamping pieces of the carrier for clamping the bottomed carton are moved back and forth by the same length in opposite directions to the endless chain conveyors. A method for adjusting the distance between the front and rear clamping pieces for clamping a bottomed carton in a straight-bottomed carton conveying device, wherein the device is transported and driven after positioning to the front and rear length.