JP2855415B2 - Structure of the receiving part in the carton carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottomed carton formed of a turret having a plurality of mandrels radially arranged at equal intervals from a material of a packaging container (carton) in which plastic films are laminated. Is lowered from the mandrel, placed on a horizontal transport line, and filled with liquids such as milk, juice, and liquor while moving and transporting on the line, and the upper opening is sealed to produce a rectangular parallelepiped package. The present invention relates to a structure of a receiving section for lowering a bottomed carton from a mandrel and placing it on a horizontal transport line.

[0002]

2. Description of the Related Art In a conventional apparatus, a horizontal transfer line is transferred from a mandrel to a tubular body inserted in a mandrel according to an intermittent rotation of a turret, and a bottom forming step is performed at a stop to form a bottom of a carton. Push the formed bottomed carton down from the mandrel at 6 o'clock,
It passes on a horizontal transport line.

[0003] The horizontal conveying line is a pair of upper and lower endless chain conveyors installed in parallel, fixed rails are installed between the conveyors, and attached to the endless chain so that the bottomed carton can run on these rails. The four corners of the bottomed carton are held by the holding pieces of the carrier.

That is, the carrier is attached to the upper and lower endless chain conveyors so that the four corners of the bottomed carton can be clamped by the corresponding front and rear holding pieces of the pair of left and right endless chain conveyors.

The position where the bottomed carton descends from the mandrel is in the vicinity of the base end of the endless chain conveyor, the front carrier to be clamped is in the parallel section of the endless chain facing each other around the base sprocket, and When the rear carrier is in the state of being opened outward during the rotation of the base sprocket, it is in the space formed by the front, rear, left and right holding pieces.

[0006] This is because the space formed by the left, right, front and rear holding pieces is widened because the rear holding piece is open outward, and an error in the timing of lowering the bottomed carton into that space can be absorbed. This is because the transfer trouble can be avoided, the carrier mounting position, and the pushing position from the mandrel can be easily determined.

[0007]

As described above, various measures have been taken to ensure the transfer from the mandrel to the horizontal transfer line. However, various problems have occurred in the actual apparatus. It is.

First, since the material of the carton is paper, sufficient crease processing is required to form a rectangular parallelepiped container. However, it is not possible to maintain the shape reliably with a series of forming devices from paperboard. It is possible, and at the time of delivery, only the bottom portion is processed and the upper portion is open, so that it is impossible to prevent twisting from occurring upward.

[0009] This twist is not fixed because it also occurs due to changes in the paper quality, the size of the container to be molded, and the temperature and humidity in the factory. As a result, even if the bottom surface is lowered to a predetermined position, the upper portion may be twisted to a space where the holding piece cannot be held by the holding piece, which may cause a trouble due to a transport error.

[0010] Next, the endless chain conveyor is configured by arranging sprockets at the base and the tip.
The tip sprocket is driven and the base sprocket is driven. Therefore, in the range in which the carrier holding piece holds and transports the carton, the pulling force of the chain acts on the driving sprocket, and the chain is loosened by operation.

This slack of the chain appears as a maximum value near the base, affects the positional relationship between the front and rear of the carrier attached to the chain, and the front holding piece becomes slack that cannot pass through the lowered position of the bottomed carton. is there.

In order to avoid this trouble, if the front carrier is positioned with a sufficient margin, the rear holding piece hits the bottomed carton. As a result, the carrier is accurately positioned, and the chain is strongly tightened and loosened. Although the best way to prevent this is to prevent the occurrence of the problem, the fact that tightening is a vicious cycle that encourages growth.

Accordingly, the present invention is directed to a structure of a receiving portion which enables accurate delivery without being affected by the twist of the carton and prevents occurrence of trouble.

[0014]

According to the present invention, a carrier having a clamping piece is attached to a pair of parallel endless chain conveyors, a bottomed carton descended from a mandrel is received, and four corners of the bottomed carton are moved forward, backward, left and right. When transported on the rail fixed between the endless chain conveyors, the front carrier that clamps the bottomed carton opposes in a parallel section around the base sprocket,
With the rear carrier in the state where the holding pieces in the middle of the rotation of the base sprocket are open outward, in the carton conveying device where the endless chain conveyor intermittently moves so that the bottomed carton descends from the mandrel, the front in the conveying direction is opened, A torsion restraining guide that the bottomed carton descends while being loosely inserted is installed immediately below the mandrel, and a pressing body is provided so as to be able to protrude forward at a position that does not protrude forward from the rear wall surface of the torsion suppressing guide. Higher than the upper end of the holding piece,
The pressing body is positioned so as to protrude into the non-moving occupied space of the left and right holding pieces at the same position as the upper part of the bottomed carton.

[0015]

[Function] With the rotation of the turret, the cylindrical body inserted into the mandrel becomes a bottomed carton and is pushed out at 6 o'clock,
It descends and is placed on the fixed rail of the horizontal transport line immediately below. Endless chain conveyors rotate intermittently on both sides,
The basic structure for nipping and transporting the four corners of the bottomed carton with the holding pieces of the front, rear, left and right carriers arranged on a pair of endless chain conveyors is the same as the conventional one.

[0016] When descending from the mandrel, the torsion restraining guide having an open front in the transport direction is inserted, and when it is mounted on a fixed rail, the upper part of the bottomed carton is hugged. It has the function of suppressing the twist of the bottom carton.

Further, since the pressing body located rearward from the rear wall surface of the torsion suppressing guide protrudes and pushes the bottomed carton forward, the bottomed carton is pushed and moves forward, and abuts the holding piece of the front carrier. The front corner of the bottomed carton is a holding piece of the front carrier, the side is the side wall of the torsion control guide, and the back is a pressing body to maintain the form and position, and the next intermittent rotation is effective. The rear corner of the bottom carton is clamped by the clamping pieces of the rear carrier, and the four corners are clamped to convey the bottomed carton.

At this time, the torsion suppressing guide and the pressing body are installed in a space which does not interfere with the space occupied by the movement of the carrier and the holding piece which is moved by the rotation of the endless chain, and does not hinder the rotation.

[0019]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a receiving section, FIG. 2 is a longitudinal front view, and FIG.

1, 1 is a pair of upper and lower endless chain conveyors, which are installed in parallel with a space therebetween,
The chain conveyors 1 and 1 intermittently rotate between the base sprockets 2 and 2 and a tip sprocket (not shown) so that the opposing surfaces move from the base to the tip, and are connected to a driving source in which the tip sprocket positively rotates. The base sprocket is driven to rotate, and a fixed rail 3 is provided between the left and right chain conveyors 1 and 1 for transferring a carton.

Carriers 4, 4,..., Which are fixed to the endless chain conveyors 1, 1 so as to extend over the upper and lower chains at regular intervals, are arranged so as to face each other on the opposing surfaces, and 4, 4, 4, 4, a clamping piece 5 having a flat L-shaped height for clamping the four corners of the carton;
5, 5, 5 are provided facing each other. In the figure, reference numeral 13 denotes a chain guide.

On the other hand, above the base sprockets 2, 2, there is a turret which has a plurality of mandrels 6 in a radial shape and forms a bottom surface of the cylindrical material to be inserted. The bottomed carton 7 formed on the bottom surface is extruded downward, and the lowered bottomed carton 7 is placed on the fixed rail 3 between the base sprockets 2.

When the bottomed carton 7 descends, the endless chain conveyors 1 and 1 are in a stopped state, and the left and right forward carriers of the holding pieces 5, 5, 5 and 5 for transporting the bottomed carton 7. 4 and 4 are located in the facing parallel section, and the rear carriers 4 and 4 are opened in the middle of the rotation of the base sprockets 2 and 2 and the rear holding pieces 5 and 5 are opened outward, and the rear holding pieces 5 and 5 are opened. The drive of the turret and the endless chain conveyors 1 and 1 is synchronized so as to descend to the place where the space to be formed is widened.

Reference numeral 8 denotes a torsion suppressing guide, which is installed at a position between the mandrel 6 and the holding piece 5 at the position of 6 o'clock, at a position where the lower surface and both side surfaces of the lowering carton 7 descend while lightly touching. It is. It is composed of a rear wall 8A and left and right side walls 8B and 8B with an open front surface, and the inside near the upper end is formed as a tapered surface 9 so that the bottomed carton 7 can be securely inserted. Even when placed, it is in contact with the upper three surfaces to prevent the form from being twisted and to maintain the form, and the left and right side walls 8B, 8B are
When the bottomed carton 7 described later is pushed forward, the contact with the side surface is maintained, and the guide and the shape can be maintained.

Further, a pressing body 11 having a surface 11A capable of pressing over substantially the vertical height of the rear surface of the bottomed carton 7 placed on the fixed rail 3 slightly behind the rear wall 8A of the twist suppressing guide 8 is installed. Air cylinder 12 provided at the rear
To push forward the bottomed carton 7 and press it against the front holding pieces 5, 5, which hold the bottomed carton 7 forward, and at the same time, keep the rear surface of the bottomed carton 7 formed.

The upper part of the pressing body 11 is inserted into a concave hole 10 provided at the center of the rear wall 8A of the torsion suppressing guide 8, and the width thereof is also extended when the holding members 5, 5,... The length is set so as not to enter, and it is configured not to interfere with each other. Since the concave hole 10 in the rear wall 8A of the torsion suppressing guide 8 is a part of the wall surface, the suppressing action on the rear surface of the bottomed carton 7 is possible, and the pressing surface 11A of the pressing body 11 is the same as the rear wall 8A. It may be a surface.

[0027]

As described above, according to the present invention, the torsion suppressing guide having an open front face is provided immediately below the bottomed carton and at a position where the upper part is suppressed even when placed on a fixed rail. The bottomed carton extruded from the mandrel is twisted due to various causes, and has the effect of maintaining its shape on three sides.

In addition, since the position of the bottomed carton to be lowered and placed on the fixed rail can be maintained and the form can be stabilized, the gap between the front holding piece and the front holding piece can be determined with a margin. It has the effect of responding to the elongation of the chain by a certain amount, while setting the chain connection itself to loosen,
This has the effect of preventing elongation.

Then, the bottomed carton is pressed against the front holding piece with the pressing body, and the abutting of the rear holding piece is awaited while keeping the bottomed carton from being twisted. No twisting occurs in the shape from the descent until the four corners are clamped by the clamping pieces, and therefore, there is an effect that the receiving can be reliably performed by clamping the clamping pieces.

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional front view showing one embodiment of the present invention.

FIG. 3 is a side view of a main part showing one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Endless chain conveyor 2 Base sprocket 3 Fixed rail 4 Carrier 5 Holding piece 6 Mandrel 7 Bottomed carton 8 Torsion control guide 8A Rear wall 8B Left and right side walls 9 Tapered surface 10 Concave hole 11 Pressing body 12 Air cylinder 13 Chain guide

Claims (1)

(57) [Claims] An endless chain is mounted on a pair of parallel endless chain conveyors. A carrier having a holding piece is attached to the bottomed carton, which is lowered from a mandrel, and four corners of the bottomed carton are held by holding pieces of the front, rear, left and right carriers. When transporting on the rail fixed between the conveyors, the front carrier holding the bottomed carton opposes in a parallel section around the base sprocket, and the rear carrier opens the holding piece in the middle of the rotation of the base sprocket and opens. In the carton conveyor where the endless chain conveyor moves intermittently so that the bottomed carton descends from the mandrel, the forward direction, which is the conveying direction, is opened, and the torsion control guide that the bottomed carton descends while loosely inserted is installed directly under the mandrel. Pressing body is provided so that it can protrude forward at a position where it does not protrude forward from the rear wall of the twist suppression guide. The torsion control guide is positioned higher than the upper end of the holding piece of the carrier, at the same position as the upper part of the bottomed carton, and the pressing body is positioned so as to project into the non-moving occupied space of the left and right holding pieces. The structure of the receiving unit in the carton conveying device, characterized in that: