JPH02219704A - Flap insertion equipment for carton - Google Patents

Abstract

PURPOSE:To surely fold insert flaps along a folding line and insert the insert flaps by supporting a top-flat along the folding line by teeth and bending the insert flap of the front edge by an insert plate and inserting the insert plate into the opening of the carton. CONSTITUTION:A cam plate 4 and an insert plate 5 are raised and supporting claws 12, 13 of teeth 2, 3 are opened and further a carton A is fed by a guide bar 30 under the condition of a top flap B folded. The cam plate 4 and a sliding body 17 are lowered and the teeth 2, 3 are turned to transfer inward the supporting claws 12, 13 and stop along a folding line (e). Simultaneously the plate 5 is lowered according to the lowering sliding body 17 to lower the folded flap top (b) by the contact with the plate. Further, the plate 5 is lowered to contact the front edge of flat (f) with the inner face of the plate 5 and the front edge of the plate 5 is inserted into the opening along the inner face of the side edges (j) of the carton A.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a flap insertion device for inserting an insert flap provided at the tip of a top flap attached to the opening side of a carton into an opening of a carton. .

(Prior Art) An example of the conventional flap insertion device is shown in FIG. 6. In FIG.
d, and the top flap b is provided with a fold line e to form an insert flap f for inserting the tip into the opening.

Bending and insertion device 100 for the insert flap f
includes a top guide bar 101 and a support guide bar 102. The top guide bar 101 presses the tip of the top flap b of the carton A that is being transferred and bends along the bending line g formed at the connection part with the case a, and the support bar 10
2 along the fold line e (see figure b), then push down the top guide bar 101 and insert the insert flap f.
Bend it along the bending line e so that the tip faces the case opening (C in the same figure). Then, pull out the support guide bar 102 and press the appropriate pressure bar 103 to close the top flap b.
Press and insert the insert flap f to complete.

(Problems to be Solved by the Invention) In this case, the support guide bar 102 needs to be pulled out after bending the top flap, so there is a problem in terms of strength due to its cantilevered structure, and it is difficult to accurately fold the top flap along the bending line. There are disadvantages such as not being able to bend the top flap.Furthermore, when pressing the center part of the top flap b with the press bar 103, there is a risk of insertion failure as shown in figure (d). ) as shown in top flap b
A means of pressing only the tip (on the side where the insert flap is attached) with a busher 104, or a means of pushing with a busher 106 to which an insertion piece 106 is attached as shown in FIG. 2(f) is adopted. However, the insertion piece 106
The insertion of the button 104 is not smooth, and neither button 104 is inserted smoothly.
．． In case 105 as well, the top flap b is not securely bent relative to the case a, and therefore there is a problem that the top flap b lifts up due to self-elasticity (so-called springback).

In view of this, an object of the present invention is to ensure the bending along the above-mentioned bending lines and the insertion of the insert flap.

A further object of the present invention is to ensure that the top flap is bent relative to the case and to prevent the top flap from lifting up.

(!!Means for Solving the Problem) The present invention to achieve the above object consists of a pair of top flaps that support the top flap from both sides along a fold line carved in the top flap attached to one side of the opening of the carton. Teeth, a cam plate that moves the teeth forward and backward relative to the top flap, an insert plate that bends the insert flap at the tip of the top flap along the above-mentioned fold line, a push plate that pushes the insert flap, and a transition between the cam plate and the insert plate. The top flap is held by the teeth along the fold line, the insert plate is lowered to bend the insert flap along the fold line, the insert plate is inserted into the carton opening, and the insert flap is pushed into the push plate. The insert plate is pressed into the carton opening along the insert plate.

In this case, the left and right pairs of teeth are each shaped like a lever, have a support claw at the tip that abuts along the fold line, a cam roller at the other end that comes into elastic contact with the cam plate, and the center part is pivotally supported on the main body frame. Preferably, the cam plate is provided with a cam surface that allows the support claw to advance and retreat with respect to the top flap, erroneously with the bending of the top flap by the insert plate that moves together.

Furthermore, the push plate is pivotally supported by the cam plate at a position on the top flap installation side from the fold line with respect to the top flap bent with the fold line as the apex,
It is preferable that the tip has a dimension sufficiently longer than the carton opening, the other end has a flat plate shape extending toward the insert plate, and a push plate elevation regulating means is provided on the insert plate side.

[For production]

The top flap is supported by the teeth along the fold line, the insert flap at the tip is bent by the insert plate, and the insert plate is inserted into the carton opening, so that when the push plate presses, the insert flap is pushed along the insert plate. It will be done. ' By opening and closing the teeth using a cam plate that moves together with the insert plate, bending of the top flap and insertion of the insert flap are performed smoothly.

Furthermore, the push plate is pivotally supported on the cam plate,
When providing a rise regulating means on the insert plate side,
By inserting the insert brake (11) of the push plate into the opening of the carton, the bending of the top flap against the case is ensured.

〔Example〕

1 to 5 show embodiments of the invention.

The flap insertion device 1 has a left and right pair of teeth 2 3 that grip the carton A along the fold line e, a cam plate 4 that opens and closes these teeth, an insert plate 5 that bends the top flap b, and pushes down the bent top flap. A push plate 6 and a drive mechanism 7 such as an air cylinder for driving these are provided.

The left and right teeth 2, 3 are lever-shaped, and the intermediate portions are pivotally supported on the main body frame 8 by pivot pins 10, 11, the lower ends are mutually bent inward, and the upper ends are knife-shaped support claws 12.
13, with cam rollers 14 and 15 attached to the upper end that come into contact with the cam plate 4, and a spring 16 to rotate the cam plate 4.
is backed by the side.

The supporting claws 12 and 13 are configured so that the attachment positions of the pivotable bins 10 and 11 or the relative position between the main body frame 8 and the carton transfer conveyor (not shown) can be adjusted so that they match the fold line e with respect to the carton A being sent. There is.

The cam plate 4 has a cam surface with a large diameter part 4a bulging out at the center and small diameter parts 4b and 4c at the top and bottom, and when pulled up, the cam rollers 14 and 16 abut against the lower small diameter part 4b, and the spring 16 As a result, the support claws 12.13 are expanded and are in a retracted position away from the top flap b, and when pressed down, the cam roller 14.15 is expanded by the large diameter portion 4a, so that the support claws 12.13 are moved inwardly from each other. , and stops along the polygonal line e of the top flap b. By further pushing down the cam plate 4, the cam rollers 14, 15 come into contact with the upper small diameter portion 4C, and the support claws 12, 13 move outward and are held in the retracted position.

The insert plate 5 is attached to the lower end of the sliding body 17. The sliding body 17 is fixed to the cam plate 4 by screws 18, and includes a guide roller 20 that fits into a vertical groove 19 formed in the main body frame 8. A slide bar 21 is attached to the upper end of the sliding body 17, and passes through a slide bearing 22 attached to the main body frame 8. 23 is a cushion material.

The push plate 6 is horizontally and swingably attached to the lower end of the cam plate 4 by a support shaft 25.

One end extends close to the insert plate 50 and is in contact with the lower end of the sliding body 17, and the other end is an eccentric flat plate having a dimension sufficiently longer than the opening to the carton, and its width W is narrower than the top flap b, and the carton The width is such that it can be inserted into the opening A.

The mounting position of the support shaft 25 on the cam plate 4 is as shown in FIG.
It is attached to the front side of the carton A, that is, to the side where the top flap b of the carton A is attached, with an appropriate distance α.

Since the push plate 6 has an eccentric structure, the insert plate side 6 & (hereinafter referred to as the rear part) is biased upward, and the lower end 17a of the sliding body 17 prevents this. This constitutes a means of regulating the rise in

Next, the procedure for bending the top flap b and inserting the insert flap f using the flap insertion device of the present invention will be explained based on FIG.

First, the top flap b of the carton A to be fed is bent in the previous step, and the carton A is fed while being held in the bent state by the guide bar 30. At this time, the insert plate 5 is located on an extension line along the inner side of the side edge j opposite to the attachment part of the top flap b of the carton A, as shown in FIG. It is bent so as to be joined to 5. The bending angle of top flap b at this time depends on the length of top flap b and the dimensions of the opening of carton a,
The angle is preferably 60° or less.

Next, when feeding into the carton, cam plate 4
And the insert plate 5 rises, so the support claws 12, 13 of the left and right teeth 2, 3 are expanded, and the carton A is fed with the top flap b kept in the bent state by the guide bar 30 (fifth Figures a)e Note that the side flaps c and d are bent in the previous process and sent in while being held down by the suppression guide bar 31.

Next, the cam plate 5 and the sliding body 17 are lowered by the operation of the drive mechanism 7, and the teeth 2 and 3 are rotated, so that the support claw 12
．． 13 moves inward and stops along the polygonal line e. At the same time, the sliding body 17 is lowered by lowering the insert plate 5 and comes into contact with the bent top flap b (FIG. 1 and C).Furthermore, the sliding body 17 is lowered by the cam plate 4 by the drive mechanism and by the support claws 12.13. The insert plate 5 pushes down the top flap b while being held along the fold line e. Therefore, the top flap b is bent at the bending line e (the position of the chain line in FIG. is inserted into the opening along the inner surface of side IIJ of carton A (FIG. d).

By further lowering the cam plate 4 and the sliding body 17, the cam rollers 14.15 of the teeth 2, 3 face the upper small diameter portion 4c of the cam plate 4, and the support claws 12.13 widen and move away from the top flap b. Move to a remote evacuation position. At the same time, the push plate 6 descends and comes into contact with the bent part k of the top flap b (Fig. The lowering of the plate 5 and the sliding body 17 pushes down the top flap b4, and pushes the top flap b further down by an angle β from horizontal as shown in <f> in the figure.The push plate 6 is supported by the support shaft 25, and the lower end of the sliding body 17a Although the free end 6b is prevented from rising, the free end 6b is able to move upward, comes into contact with the entire surface of the top flap b, and presses the top flap b mounting portion of the case a.

That is, by ensuring that the top flap b is bent securely and by bending it at a right angle or more, the top flap b is locked in a position where the return action (springback) due to the reaction force of the top flap b does not occur.

Then, the insert plate 6 and the push plate 6 are pulled up to complete the insertion work (g in the figure).

〔Effect of the invention〕

According to the present invention, the supporting claws of the teeth are positioned from both sides along the fold line formed on the top flap of the carton, and the top flap is bent by the insert plate, so the flap can be gripped reliably. ,
Therefore, folding along the fold line can be performed accurately. Further, since the tip of the insert plate is inserted into the carton, the insert flap at the tip of the top flap is guided by this plate, making insertion easy.

In addition, since the above-mentioned teeth are opened and closed by a cam plate that moves together with the insert plate, the associated operation of moving the top flap to the grasping position when folding by lowering the insert plate and moving it to the retracted position when pushing by the push plate is performed. can be done reliably.

Furthermore, the top flap is pressed by a push plate, and the push plate has a rise regulating means on the insert plate side, so that when installing the top flap, the insert flap side is pushed into the case opening, and when the top flap is installed, the side is also pressed. By doing so, it is possible to prevent the top flap from being pulled out due to its restoring force.

[Brief explanation of the drawing]

1 to 5 show embodiments of the present invention, FIG. 1 is a front view of the entire flap insertion device, FIG. 2 is a right side view thereof, and FIG. 3 is taken along line I-1 in FIG. 1. 4 is a plan view of the push plate, FIG. 5 is an explanatory diagram of how to insert a flap, and FIG. 6 is an explanatory diagram of a conventional flap insertion procedure. 1 is the flap insertion position B. 2.3 is a tooth, 4 is a cam plate, 5 is an insert plate, 6 is a push plate, 7 is a drive mechanism, 12.13 is a support claw, 14.1
5 is a cam roller, 17a is a rise regulating means, A is a carton, b is a top flap, e is a fold line, and f is an insert flap. f Near > Dimensions - Top V Figure 6 (C)

Claims (3)

[Claims] (1) A pair of teeth that support the top flap from both sides along a folded line carved into the top flap attached to one side of the opening of the carton, a cam plate that moves the teeth forward and backward relative to the top flap, and a top flap An insert plate that bends the insert flap at the tip of the top flap along the fold line, a push plate that pushes the insert flap, and a drive mechanism that moves the cam plate and the insert plate, and holds the top flap along the fold line with teeth. The insert flap is bent along the fold line by lowering the insert plate, the insert plate is inserted into the carton opening, and the insert flap is pushed into the carton opening along the insert plate by the pressure of the push plate. Carton flap insertion device. (2) The left and right pairs of teeth are each lever-shaped,
The tip has a support claw that contacts along the fold line, and the other end has a cam roller that presses into contact with the cam plate.The center part is pivotally supported on the main body frame, and the cam plate bends the top flap using an insert plate that moves together. 2. The carton flap insertion device according to claim 1, further comprising a cam surface for advancing and retracting the support claw relative to the top flap in conjunction with the cam surface. (3) The push plate is pivotally supported by the cam plate at a position on the top flap installation side from the above fold line with respect to the top flap that is bent with the fold line as the apex, and the tip has a dimension sufficiently longer than the carton opening, and 2. The carton flap inserting device according to claim 1, wherein the end has a flat plate shape extending toward the insert plate, and a push plate elevation regulating means is provided on the insert plate side.