JPH0623875A - Molding device for flexible cylindrical containers - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a molding device for a flexible cylindrical container, which can easily mount a cylindrical member and can firmly hold the cylindrical member. [Structure] A fixed table 11 and a movable table 12 are provided for a molding table 10 for holding a disk-shaped member serving as a side surface of a container.
And each movable table 12 is moved toward the inside of the forming table 10 by each air cylinder 30, so that the cylindrical member can be inserted into the forming table 10. Further, by returning each movable table 12 at the time of the maximum circumference of the molding table 10 with the cylindrical member inserted, the peripheral surface of the molding table 10 is pressed against the opening edge of the cylindrical member, and the cylindrical member is formed. Held by 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom surface of a container or a top surface of a lid at an opening edge at one end of a cylindrical member which is a side surface of a container body or a lid in a process of manufacturing a flexible cylindrical container for transportation of milk and the like. The present invention relates to a molding device of a flexible cylindrical container for holding an opening edge of a cylindrical member in a shape corresponding to the circular plate-shaped member when joining the peripheral edges of the circular plate-shaped member.

[0002]

2. Description of the Related Art Conventionally, this kind of flexible cylindrical container is manufactured from a waterproof cloth or the like, and the container body can be shrunk when there is no stored item, so that it is widely used for transportation of milk and the like. It is used. As shown in FIG. 10, this cylindrical container is composed of a bottomed cylindrical container body 1 and a lid 2 attached to the upper end of the container body 1, and the container body 1 can be vertically expanded and contracted. . Further, an air vent port 3 also serving as a sampling is provided on the upper surface of the lid 2, and an outlet port 4 is provided on the lower side surface of the container body 1, so that the body surface of the container body 1 is kept circular in shape. The reinforcing band 5 is wrapped around.

In the process of manufacturing the cylindrical container,
The container body 1 is formed by joining a cylindrical member 1a, which is the side surface, and a disk-shaped member 1b, which is the bottom surface,
The lid 2 is formed by joining a cylindrical member 2a, which is the side surface, and a disk-shaped member 2b, which is the upper surface. At that time, the molding jig 6 shown in FIG. 11 is used. The molding jig 6 is composed of an annular band 6a having both ends overlapped with each other, and is configured so that the peripheral length is reduced by removing the bolts 6b connecting the both ends. Further, a large number of folding pieces 6c are formed on the peripheral edge of the annular band 6a.
Have gaps therebetween so that they can follow the expansion and contraction of the annular band 6a. That is, in the process of manufacturing the cylindrical container, as shown in FIG.
When the cylindrical member 1a of the container body 1 and the disc-shaped member 1b are joined as shown in 2, after the bolt 6b is removed and the molding jig 6 having a reduced circumference is inserted into the cylindrical member 1a. , Install the bolt 6b again. As a result, the annular belt 6
The peripheral length of a is enlarged and comes into pressure contact with the inner surface of the opening edge at one end of the cylindrical member 1a, and the opening edge of the cylindrical member 1a is held in a circular shape corresponding to the disc-shaped member 1b. Then, the disc-shaped member 1b is aligned with the opening edge of the cylindrical member 1a, and each folding piece 6 is formed.
A large number of joint margins 1c provided on the peripheral edge of the disc-shaped member 1b are folded back to the cylindrical member 1a side and adhered. Next, the elastic band 7 for reinforcement is attached to the joint between the cylindrical member 1a and the disc-shaped member 1b. The elastic band 7 is composed of an annular bias band or the like, and its peripheral length is slightly smaller than that of the cylindrical member 1a. That is, by inserting the elastic band 7 into the joint between the cylindrical member 1a and the disc-shaped member 1b while enlarging the circumference, the elastic band 7 is attached to this joint in a tensioned state. Then, the molding jig 6 is removed after the adhesive is hardened, whereby the joining of the cylindrical member 1a and the disc-shaped member 1b is completed. Also, the cylindrical member 2 of the lid 2
Also in the case of a and the disk-shaped member 2b, they are joined by the same process as described above.

[0004]

However, in order to expand and contract the circumference of the molding jig 6, the bolt 6b must be manually attached and detached, which makes the mounting operation of the molding jig 6 difficult and the production is difficult. There was a problem that the efficiency was lowered. In addition, since the molding jig 6 does not have sufficient strength due to the structure that it expands and contracts by hand, the molding jig 6 cannot be pressed firmly against the cylindrical members 1a and 2a, so that the cylindrical members 1a and 2a cannot be pressed firmly. However, there is also a problem in that it causes misalignment or slack to cause poor adhesion.

The present invention has been made in view of the above problems, and an object of the present invention is to easily mount a cylindrical member and to firmly hold the cylindrical member. An object is to provide a molding device for a flexible cylindrical container.

[0006]

In order to achieve the above object, the apparatus for molding a flexible cylindrical container according to the present invention is characterized in that, in claim 1, the cylindrical member is provided inside a cylindrical member which is a side surface of the container. A forming table that holds the opening edge of the member on the peripheral surface, a movable table that forms a part of the peripheral surface of the forming table and is movable in a direction that reduces the peripheral length of the forming table, and drives the movable table. And a drive mechanism for operating.

Further, according to a second aspect of the present invention, there is provided a lock mechanism for restricting the movement of the movable table in the circumferential length reduction direction at the maximum circumferential length of the forming table.

[0008]

According to the molding apparatus for a flexible cylindrical container of the first aspect, the cylindrical member can be inserted into the molding table by moving the movable table in the direction of reducing the circumferential length of the molding table. Further, by returning the movable table to the maximum peripheral length of the forming table with the cylindrical member inserted, the peripheral surface of the forming table is pressed against the opening edge of the cylindrical member, and the cylindrical member is held by the forming table. .

According to the molding apparatus for a flexible cylindrical container of the second aspect, in addition to the effect of the first aspect, the movable table is moved by the lock mechanism in the circumferential length reducing direction at the maximum circumferential length of the molding table. Being regulated,
The movable table is securely fixed.

[0010]

1 to 5 show a first molding apparatus according to the present invention.
FIG. 1 is a plan view thereof, and FIG. 2 is a side view thereof. The constituent parts of the flexible cylindrical container are designated by the same reference numerals as in the conventional example. That is, 1 is a container body, 1
Reference numeral a is the cylindrical member, 1b is the disc member, and 7 is the elastic band for reinforcing the joint.

In the figure, reference numeral 10 denotes a molding table for holding the opening edge of the cylindrical member 1a on the peripheral surface, which is formed in a disc shape as shown in FIG. 1 and which is fixed to form the peripheral surface and a part of the upper surface. It consists of a table 11 and a movable table 12. That is, the peripheral surface of the molding table 10 is divided into a total of four by the respective tables 11 and 12, and the molding table 10 is configured to have a disk shape by matching the peripheral surfaces of the respective tables 11 and 12. The fixed tables 11 are provided at both ends of the forming table 10, and are formed in parallel with each other except for the portion forming the peripheral surface of the forming table 10.
The movable table 12 is provided between each fixed table 11,
The fixed table 11 can be moved to the inside of the forming table 10 along the linear portion. That is, two guide rods 13 are connected to two positions in the width direction of each movable table 12, and each guide rod 13 is slidably inserted into the guide bush 14.

Reference numeral 20 denotes a trolley for supporting the molding table 10. As shown in FIG. 2, a pillar 23 is erected on a leg portion 22 having casters 21, and a substrate 24 for supporting the molding table 10 is provided at an upper end of the pillar 23. Is installed. That is, the guide bushes 14 are fixed on the board 24, and the fixed tables 11 are installed on both ends of the board 24.

An air cylinder 30 drives each movable table 12, and one air cylinder is provided for each movable table 12. In each air cylinder 30, a drive rod 31 extending in parallel with the guide rod 13 is connected to each movable table 12, and the drive rod 31 is moved back and forth to form each movable table 12 as shown in FIGS. 3 and 4. It is adapted to move in and out of the table 10. Although not shown, each air cylinder 30 is operated by a hand valve, a foot valve, or the like.

Next, a method of molding the flexible cylindrical container by the molding apparatus configured as described above will be described.

First, the air cylinder 30 is operated to move each movable table 12 toward the inside of the molding table 10 as shown in FIGS. As a result, the peripheral length of the forming table 10 is reduced, and the cylindrical member 1a can be inserted into the forming table 10. Next, while aligning the opening edge at one end of the cylindrical member 1a with the peripheral surface of the forming table 10,
The air cylinder 30 is operated to move each movable table 12 toward the outside of the forming table 10, and the forming table 10 is returned to the maximum circumferential length as shown in FIGS. 1 and 2. As a result, the molding table 10 is pressed against the opening edge of the cylindrical member 1a, and the cylindrical member 1a is held in a circular shape. Then, the disc-shaped member 1b is joined to the cylindrical member 1a thus held on the forming table 10 in the same manner as in the conventional case.

Next, the cylindrical member 1a and the disc-shaped member 1b.
The elastic band 7 similar to the conventional one is attached to the joining portion of, but the attaching jig 40 as shown in FIG. 5 is used for this attaching work.
The circumference of this mounting jig 40 is about 97% of that of the forming table 10.
The elastic band 7 having a peripheral length of about 95% of the forming table 10 is temporarily attached to the peripheral surface of the cylindrical body formed in the above.
That is, in this mounting operation, first, the elastic band 7 is inserted into the mounting jig 40 while increasing the circumferential length thereof, and the non-inserted portion is placed above the inserted portion as shown in FIG. 5 (a). Fold it up. At this time, since the circumference of the mounting jig 40 is smaller than that of the forming table 10, the work of inserting the elastic band 7 is extremely easy. Next, the mounting jig 40 to which the elastic band 7 is mounted
Is positioned above the forming table 10 and the folded portion of the elastic band 7 is placed on the forming table 10 as shown in FIG. 5 (b).
It is folded back on the surface of the cylindrical member 1a held by and the mounting jig 40 is removed. As a result, as shown in FIG. 5C, the portion of the elastic band 7 inserted into the mounting jig 40 is attached to the disc-shaped member 1b by its elasticity, and the mounting of the elastic band 7 is completed.

In this embodiment, the joining process of the cylindrical member 1a of the container body 1 and the disc-shaped member 1b has been described, but the joining process of the cylindrical member 2a of the lid 2 and the disc-shaped member 2b is also explained. The same can be done.

As described above, according to the molding apparatus for a flexible cylindrical container of this embodiment, the molding table 10 for holding the disk-shaped member 1b is formed of the fixed table 11 and the movable table 12, and the movable table 12 is formed. Since the peripheral length of the molding table 10 is reduced by moving it toward the inside of the molding table 10, the container body 1 or the lid 2
The cylindrical members 1a and 2a that are the side surfaces of the molding table 10
The cylindrical members 1a and 2a can be firmly pressed against the molding table 10 because they can be mounted extremely easily and mechanically held.

6 to 9 show a second embodiment of the molding apparatus according to the present invention, in which a lock mechanism for the movable table is added. Here, FIG. 6 is a plan view of the molding apparatus, and FIG. 7 is a side view thereof, and the same components as those in the above-mentioned embodiment are designated by the same reference numerals. That is, 10 is a forming table, 11 is a fixed table, 12 is a movable table, 13 is a guide rod, 14 is a guide bush, and 20 is a carriage.

In the figure, 50 is each movable table 12.
Is an air cylinder that drives the vehicle, and is installed in the center of the carriage 20 so that the drive rod 51 faces upward. A vertically movable plate 52 is attached to the drive rod 51, and the vertically plate 52 is slidably mounted on a guide shaft 53 extending in parallel with the drive rod 51a. The lift plate 52 is connected to each movable table 1 by a total of four links 54.
The board 24 of the carriage 20 is formed with a notch 24a through which each link 54 can be inserted. Further, each link 54 is used for the lifting plate 5 when the forming table 10 has the maximum circumference.
2 and the movable table 12 are formed so as to be substantially horizontal.

With the above construction, when the peripheral length of the forming table 10 is reduced, the air cylinder 50 is operated to lower the elevating plate 52. At that time, the pulling force of the link 54 acts diagonally downward on each movable table 12, but since each movable table 12 is guided by the guide rod 13, it moves horizontally toward the inside of the forming table 10. As a result, the peripheral length of the molding table 10 is reduced as shown in FIGS. 8 and 9. Further, when the peripheral length of the forming table 10 is increased, the air cylinder 50 is operated to raise the elevating plate 52. At that time, a link 5 is attached to each movable table 12.
Although the pressing force of 4 acts diagonally upward, each movable table 1
Since 2 is guided by the guide rod 13, it moves horizontally toward the outside of the forming table 10. As a result, the peripheral length of the molding table 10 is expanded as shown in FIGS. 6 and 7. Further, at the maximum circumference of the forming table 10, the link 54 is in a substantially horizontal state, and the movable table 1
Since the moving direction of 2 and the link 54 are located substantially on the same line, the drive rod 51a cannot be lowered by the force acting on the link 54 in this state. Therefore,
The link 54 serves as a stopper in the direction in which each movable table 12 contracts, and even if the supply of air to the air cylinder 51 is cut off in this state, each movable table 12 is locked at the stroke end. That is, the link 54 is used for each movable table 1.
2 lock mechanism.

As described above, according to the molding apparatus of this embodiment, the elevating plate 52 which moves up and down by the air cylinder 50 is connected to the movable table 12 via the link 54, and the link 54 is moved when the molding table 10 has the maximum circumference.
Are arranged on substantially the same line along the moving direction of the movable table 12, so that each movable table 12 can be locked at the stroke end, and each movable table 12 is securely fixed at the maximum circumference of the forming table. be able to. Further, according to the above configuration, since the air supply to the air cylinder 50 can be cut off while the movable tables 12 are locked, the present apparatus can be easily separated from the air supply apparatus and the working conditions can be freely set. The degree can be greatly expanded.

In this embodiment, the lock mechanism is constituted by the link 54. However, for example, an air cylinder with a lock function known in the first embodiment may be used.

[0024]

As described above, according to the molding apparatus for a flexible cylindrical container of the first aspect, the cylindrical member serving as the side surface of the container body can be easily mounted, so that the workability is significantly improved. Can be improved. Further, since the cylindrical member can be firmly held, adhesion failure does not occur and quality can be improved.

According to the molding apparatus for a flexible cylindrical container of the second aspect, the effect of the first aspect can be achieved, and the movable table can be securely fixed at the maximum circumference of the molding table.

[Brief description of drawings]

FIG. 1 is a partial sectional plan view of a molding apparatus for a flexible cylindrical container showing a first embodiment of the present invention.

FIG. 2 is a partial sectional side view of a molding apparatus.

FIG. 3 is a partial cross-sectional plan view showing the operation of the molding apparatus.

FIG. 4 is a partial sectional side view showing the operation of the molding apparatus.

FIG. 5 is an explanatory view showing a method of attaching an elastic band.

FIG. 6 is a partial cross-sectional plan view of a molding device for a flexible cylindrical container showing a second embodiment of the present invention.

FIG. 7 is a partial cross-sectional side view of the molding apparatus.

FIG. 8 is a partial sectional plan view showing the operation of the molding apparatus.

FIG. 9 is a partial cross-sectional side view showing the operation of the molding apparatus.

FIG. 10 is a side view of a flexible cylindrical container.

FIG. 11 is a plan view of a molding jig showing a conventional example.

FIG. 12 is a perspective view showing a conventional molding method.

[Explanation of symbols]

1 ... Container body, 1a ... Cylindrical member, 1b ... Disc-shaped member,
2 ... Lid, 2a ... Cylindrical member, 2b ... Disc-shaped member, 10 ...
Molding table, 11 ... Fixed table, 12 ... Movable table, 30, 50 ... Air cylinder, 54 ... Link.

Claims (2)

[Claims] 1. A forming table which is inside a cylindrical member which is a side surface of a container and holds an opening edge of the cylindrical member by a peripheral surface, and a part of the peripheral surface of the forming table and the forming table. A molding apparatus for a flexible cylindrical container, comprising: a movable table movable in a direction of reducing the circumference of the table; and a drive mechanism for driving the movable table. 2. The molding apparatus for a flexible cylindrical container according to claim 1, further comprising a lock mechanism for restricting movement of the movable table in a circumferential length reduction direction at a maximum circumferential length of the molding table.