JPS6123379Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a folding device for an automatic box making machine that automatically assembles assembled cans, and in particular folds the inner wall of a double side wall type assembled can which does not have a narrow flat upper edge to the outside. This invention relates to an improvement in a folding device used when folding against a wall.

Conventionally, there have been various types of assembled canisters, including Japanese Patent Publication No. 47-35872, Japanese Patent Publication No. 16273-1973, Japanese Patent Publication No. 48-63880, and Japanese Utility Model Publication No. 49-1973.
-128633, Utility Model Application Publication No. 51-35432, etc. are frequently used.

This is a double side wall assembly box with a so-called narrow flat upper edge.The side wall looks thick and has excellent strength, so it is suitable for storing relatively heavy items such as canned goods and fruits. Used in cases.

Also, double-sided wall type assembly boxes without the narrow flat upper edge are also known, and are mainly used as confectionery boxes.

Furthermore, as an improved structure of the double side wall type assembly box which does not have a narrow flat upper edge, a partial bottom wall is provided continuously to the inner wall, and when assembled, the four circumferences of the bottom wall are partially double. Things are also known.

The double-side wall type assembly box having the narrow flat upper edge described above can be automatically assembled using the automatic box making machine disclosed in each of the above-mentioned publications.

However, the folding device of the automatic box-making machine must form a flat upper edge when folding the inner wall inward against the outer wall, so it applies strong pressure so that the inner wall completely overlaps the outer wall. It is constructed so that it will not bend while doing so.

This is because if the sheet is bent while applying strong pressure to completely polymerize, the flat upper edge will not be shaped and will be crushed.

Therefore, although it is possible to use such a bending device to bend the inner wall of a double-side wall assembly box without a narrow flat upper edge against the outer wall, in this case, the outer wall and It is not possible to make the folds (that is, the upper edges) between the inner walls relatively sharp, and the inner and outer walls are assembled in a swollen state.

As a result, the appearance of the canister is extremely poor, reducing its value, and when such a canister is used as the canister body and lid, it is very difficult to combine them.

This invention was devised in order to solve the problems mentioned above, and its purpose is to improve the appearance and value of the bag, as well as to make the bag itself and lid look good. In order to make this easier even when these are combined, the inner wall of the double side wall assembly box without the narrow flat upper edge can be bent and pressed so as to overlap with the outer wall. To provide a folding device capable of forming a relatively sharp fold between an inner wall and an outer wall.

The bending device of the present invention includes a base body, a movable body provided to be movable forward and backward with respect to the base body, and a vertical pressing member provided at the front of the movable body and capable of abutting against the outer wall of the assembled box. a bending plate which is pivotally connected to the upper part of the pressing body so as to be vertically rotatable from an upright state to a hanging state, and which can be bent to abut the inner wall of the assembly box and overlap it with the inner side of the outer wall; , consisting of a synchronization mechanism that synchronizes the forward and backward movements of the movable body and the upward and downward movements of the bending plate so that the bending plate moves upward and downward as the movable body moves forward, and a single fluid pressure cylinder that drives the synchronization mechanism. There are certain characteristics.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of embodiments of the present invention will be explained below based on the drawings.

FIG. 1 is a partially cutaway perspective view of the bending device according to the present invention, showing a state in which the movable body is in the retreated original position and the bending plate is also in the raised original position. ing.

FIG. 2 is a partially cutaway side view showing the same state as FIG. 1.

FIG. 3 is a partially cutaway side view of the main part showing a state in the middle of operation.

Figure 4 shows that as the movable body moves forward to the maximum, the bending plate assumes a drooping bending position, and the press plate and the bending plate fixed to the movable body are pressed to overlap the inner and outer walls of the assembled canister. FIG. 2 is a partially cutaway side view of the main part showing the state.

The main parts of the bending device 1 according to the present invention include a base body 2, a movable body 3, a pressing plate 4, a bending plate 5, a synchronization mechanism 6, and a fluid pressure cylinder 7.

The base body 2 is attached to the fixed side,
In this embodiment, it is composed of two L-shaped plates 8, 8 spaced apart from each other in the front and rear (the right side in FIG. 2 is the front).

The movable body 3 is provided to be able to move forward and backward with respect to the base body 2, and in this embodiment, it is composed of side plates 9, 9 spaced apart left and right, and a connecting member 10 that connects the middle upper parts of these side plates 9, 9. These are arranged on the horizontal plate portions of the L-shaped plates 8, 8.

A roller 11 is provided between the base body 2 and the movable body 3 to facilitate relative movement. In this embodiment, upright plates 12 are provided at the left and right ends of the L-shaped plates 8, 8 of the base body 2, and rollers 11 are pivotally supported on the upper portions of the upright plates 12. , 9 are formed with guide grooves 13, 13 in the lower portions of their outer surfaces, respectively, so that the roller 11 rolls within the guide grooves 13.

The pressing plate 4 is a vertical flat plate, and is fixed to the front surface of the movable body 3. In other words,
This is fixed to the front surfaces of the left and right side plates 9 and also functions as a connecting plate, and in this embodiment, it is fixed so as to protrude to the right from the right side plate. This is done in relation to the attachment of the bending plate 5.

The bending plate 5 is pivotally attached to the upper part of the pressing plate 4 by a horizontal axis 14 in the left-right direction.

Specifically, the bending plate 5 has a Z-shaped side surface.
It is attached to the mold bracket 15. On the other hand, the pressing plate 4 is provided with an L-shaped bracket 1 that is approximately inverted L-shaped.
6 is fixed, and one short piece of the Z-shaped bracket 15 and a short piece of the L-shaped bracket 16 are connected to the horizontal axis 14.
It is pivotally connected by.

The bending plate 5 can be tilted up and down from the upright state shown in FIGS. 1 and 2 to the hanging state shown in FIG. The position of the horizontal shaft 14 is determined so that the inner and outer walls B and C of the assembled canister A can be clamped between them.

The synchronization mechanism 6 synchronizes the forward and backward movement of the movable body 3 and the up-and-down movement of the bending plate 5, and in the case of this embodiment, three shafts 17, 18, 19,
Four gears 20, 21, 22, 23, one rack 24, two arcuate links 25, 26,
It consists of one arm 27 for input.

That is, in the front parts of the side plates 9, 9 forming the moving body 3, first, second, third shafts 17,
18 and 19 are rotatably supported, a first gear 20 is mounted on the first shaft 17, and a first gear 20 is mounted on the second shaft 1.
Second and third gears 21 and 22 are wedged to the shaft 8, and a fourth gear 23 is wedged to the third shaft 19, respectively.

The first gear 20 and the second gear 21 mesh with each other,
The third gear 23 and the fourth gear 23 mesh with each other.

A rack 24 is fixed to the front L-shaped plate 8 constituting the base 2, and is meshed with the first gear 20.

An input arm 27 is fixed to the second shaft.

The third shaft 19 projects outward from the right side plate 9, and one end of the first arcuate link 25 is fixed thereto. One end of a second arcuate link 26 is pivotally attached to the other end of the first arcuate link 25 by a first horizontal pin 28 in the left-right direction, and the other end of the second arcuate link 26 is attached to the aforementioned Z-shaped bracket. It is pivotally connected to the other short piece of 15 by a second horizontal pin 29.

Note that the first and second arcuate links 25 and 26 are
When in the original position shown in FIGS. 1 and 2, they are arranged in a continuous arc shape.

The single fluid pressure cylinder 7 is for driving the synchronization mechanism 6, and a bracket 3 is attached to one side plate 9 of the movable body 3 so as to be adjustable in the front and back direction.
0 and the arm 27, and in this embodiment, a pneumatic cylinder is used.

Next, the operation in such a configuration will be explained.

1 and 2 show the original position in which the movable body 3 is in the retreated position and the bending plate 5 is in the upright position.

The assembled box A is lowered by a lowering upper mold and a vertical guide plate (lower mold) (not shown), and the outer wall C and the inner wall B are vertically folded up against the bottom wall D. , is placed on a stopper 31 that moves forward and backward, and is stopped. (See Fig. 2) When the fluid pressure cylinder 7 is extended, the arm 27, second shaft 18, second gear 21, and third gear 22 rotate counterclockwise, and the first gear 20,
The first shaft 17, the fourth gear 23, and the third shaft 19 rotate clockwise.

The first gear 20 is connected to a rack 24 fixed to the base body 2.
As a result, the movable body 3 moves forward with respect to the base body 2, and as the third shaft 19 further rotates clockwise, the bending plate 5 connects the two arcuate links 2.
5 and 26, it rotates clockwise about the horizontal shaft 14, and as shown in FIG. 3, presses the inner wall B of the assembled box A and bends it against the outer wall C.

When the fluid pressure cylinder 7 further expands, the movable body 3 moves forward as shown in FIG.
comes into contact with the outer wall C of the assembled canopy A. At the same time, the bending plate 5 rotates to a hanging state, and the inner wall B is moved to the outer wall C.
Then, in cooperation with the pressing plate 4, the inner wall B and the outer wall C are clamped and pressed.

When the inner wall B and the outer wall C are pressed to strongly polymerize, the fold, that is, the upper edge E, is relatively sharp, and the inner and outer walls B and C do not swell.
It will look like a single side wall.

When the above-mentioned action is completed, the hydraulic cylinder 7 is shortened. Then, the bending plate 5 and the movable body 3 return to their original positions in the reverse order as described above.

The assembled box A shown in the figure is an example in which a partial bottom wall F is connected to an inner wall B, and when the inner wall B is overlapped with the outer wall C, the partial bottom wall F is as shown in FIG. As shown, the height of the bending plate 5 is set so that it overlaps the bottom wall D.

The folding device 1 according to the present invention exhibits such a structure and function, but when applying this to an automatic box making machine, the bending process of each side wall of the assembled box, the relationship between the guide plates, etc. should be taken into consideration. Determine their arrangement, number, etc.

The folding device shown in this embodiment mainly bends only the front and rear side walls of the assembled case using the upper and lower case forming parts, and the left and right side walls are bent using a torsion guide plate mechanism, a torsion belt mechanism, etc. at an earlier stage. In addition, in the case of the upper and lower case making sections, it is assumed that two folding devices are used for one side wall of the assembled case depending on the relationship of vertical guide plates, etc. In other words, it is assumed that a total of four bending devices are provided in the upper and lower case forming sections to bend the front and rear side walls of the assembled case.

Therefore, based on the same principle, if the left and right side walls are also to be bent in the upper and lower case making sections, four more folding devices may be added.

Furthermore, depending on the relationship between the vertical guide plates and the like in the upper and lower case making sections, one folding device can be used for one side wall of the assembled case.

In this case, for example, the bending plate 5 shown in FIG. It may correspond to the length of the side wall. Furthermore, the left and right bent plates can be made into one continuous piece without separating them.

Furthermore, the folding plate 5 of the folding device 1 shown in FIG. 1 may correspond to the length of the side wall.

As described above, according to the present invention, the following excellent effects can be achieved.

(1) The inner wall of a double side wall assembly box without a narrow flat top edge can be bent and pressed so as to overlap with the outer wall.

As a result, the fold between the inner wall and the outer wall, that is, the upper edge, can be made relatively sharp, improving the appearance and value of the box.

Even when the assembled bag is used as the bag main body and lid bag and these are combined, the inner and outer walls are not in a swollen state, so the combination can be made extremely easily.

(2) Since the vertical pressing plate is brought into contact with the outer wall of the assembled canister sent to the bending position,
The outer wall of the assembled canister can be made exactly vertical.

(3) Since the pressing plate and the bending plate are moved forward only when folding the assembled canister sent to the bending position, these do not interfere with each other when the assembled canister is moved. It is extremely easy to move the assembled container.

(4) The forward and backward movement of the moving body and the upward and downward movement of the bending plate are synchronized so that the bending plate is lowered as the moving object moves forward, so that the bending plate is lowered down after the moving object has finished moving forward. The bending speed can be shortened compared to the case where the bending speed is reduced.

(5) The forward and backward movements of the moving body are synchronized with the up-and-down movements of the bending plate so that the bending plate goes down as the moving body moves forward. Compared to the case where the movable plate moves forward, there is no need for a stopper means or the like to stop the forward movement of the movable plate, which simplifies the structure and prevents breakdowns.

(6) Since the forward/backward movement of the movable body and the elevational movement of the bending plate are synchronized by a synchronization mechanism, it is necessary to drive each of the movable body and the bending plate by a fluid pressure cylinder and to synchronize them. This makes synchronization easier and requires only a single fluid pressure cylinder, simplifying the structure and reducing costs.

(7) Since the base body, movable body, bending plate, synchronization mechanism, and hydraulic cylinder are all in one package, the desired number and location of the automatic box making machine can be installed, and the size of the assembled box can be easily adjusted. can be easily adapted to.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing the original position of the folding device according to the present invention. FIG. 2 is a partially cutaway side view showing the same state as FIG. 1; Figure 3 shows
FIG. 3 is a partially cutaway side view of the main part showing a state in the middle of operation. FIG. 4 is a partially cutaway side view of the main part showing the bent state. 1... Bending device, 2... Base body, 3... Moving body,
4...Press plate, 5...Bending plate, 6...Synchronization mechanism,
7... Fluid pressure cylinder, 8... L-shaped plate, 9... Side plate, 10... Connection member, 14... Horizontal shaft.

Claims (1)

[Scope of utility model registration request] A base body 2, a movable body 3 provided to be movable forward and backward with respect to the base body 2, and a vertical pressing plate 4 provided at the front of the movable body 3 and capable of abutting against the outer wall C of the assembly box A. The upper part of the pressing plate 4 is pivoted so as to be able to move up and down from the upright position to the hanging position, and can be bent to abut the inner wall B of the assembly box A and overlap it with the inner side of the outer wall C. A synchronization mechanism 6 that synchronizes the forward and backward movements of the moving body 3 and the upward and downward movements of the bending plate 5 so that the bending plate 5 is lowered as the moving body 3 moves forward.
and a single fluid pressure cylinder 7 that drives a synchronization mechanism 6.