JPH0333607Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a cylindrical container body that is filled with liquid or other contents and then covered with an end plate member. The present invention relates to a sealing device for adhesively sealing an end plate member and an end plate member to each other along an overlapping portion thereof.

Prior Art The present invention is an improvement of the container sealing device described in Japanese Utility Model Application Publication No. 59-115703, and the schematic structure of the device described in this publication is shown in FIG. This device has a die 4 placed inside an overlapping part 3 between a cylindrical container body 1 and an end plate member 2 placed over the end thereof, and presses this overlapping part 3 between the die and the die. It has a pressing piece 5. This pressing piece is made of an elastic material such as steel, and as shown in FIG. A separate pressing piece may be formed and the upper end thereof may be fixed to the support member by any means. In either case, the pressing piece is formed with a notch 7 to facilitate deformation, so that it can swing toward and away from the die by elastic deformation.

Although the pressing piece 5 is arranged on the outside of the die 4 in FIG. 3, it is also possible to arrange the pressing piece on the inside with the die on the outside. The die 4 and the pressing piece 5 can both be movable in the vertical direction so that the container body 1 sent laterally can be received, or the die 4 and the pressing piece 5 can be immobile in the vertical direction,
The container body may be moved upwards to load the sealing device. The die 4 functions only as a backup device when bonding is performed simply by the pressure of a pressing piece, but when bonding is performed by heat and pressure, the die 4 is equipped with a heating device inside, and after heating, melted adhesive or When the resin is solidified, the die 4 is provided with a cooling means when used to apply pressure with the pressing piece 5 to ensure a sealing effect. In this specification, the term "sealing device" is used to mean any device that includes or does not include a temperature adjustment device for heating or cooling as described above in the die 4. .

A tapered surface 8 is formed at the lower part of the pressing piece, and a driving member 9 is provided so as to surround the tapered surface, and a corresponding tapered surface 10 is formed on the inner periphery of the driving member. The driving member 9 is driven in the vertical direction relative to the pressing piece 5, and when it moves upward, the pressing piece 5 is pushed inward by a cam action, and pressure is applied to the overlapping part 3 between the container body 1 and the end plate member 2. is applied and moved downward, the pressing piece 5 is enabled to return to its original position by the action of the spring.

Problems to be Solved by the Invention In the conventional device as described above, the bending stress acting on the cut portion of the pressing piece is large, and the pressing piece cannot be expected to have a long life due to fatigue damage caused by this. If we focus only on the bending stress caused by this swinging, assuming that the swinging angle of the entire pressing piece is constant, the thinner the wall thickness of the cut portion 7 is, the more The longer the length, the more the reduction can be achieved, but in reality, as shown in Figure 5, the thin wall part is deflected in a complicated manner (the deflection is exaggerated for the sake of illustration). Due to the damage caused by this, a long life cannot be expected.

Means for Solving the Problems In the present invention, a thin part is formed on the upper part of the pressing piece, and the part is engaged with the pressing piece below the thin part, so that the pressing piece can be moved in both swing directions. The above-mentioned problem has been solved by providing a locking portion that restricts the displacement of the engaging portion.

Embodiment FIG. 1 shows one embodiment of the present invention, where 24 is a die and 25 is a pressing piece. A plurality of pressing pieces are arranged close to each other in the circumferential direction, similar to the one shown in FIG. In this example, unlike the one in FIG.
Although the support member is designed to be fixed in place, it is also possible to make a slit in the support member and form it as an integral part, as shown in FIG. The drive device 26 has an actuation rod 27 selectively driven in the vertical direction and a drive cam member 28 fixed thereto, and a return device 30 is provided, which has a return cam member 29. The return cam member is connected to the operating rod 27 by a mounting member passing through a slot 31 formed in the pressing piece 25.
, so that the drive device 26 and the return device can move vertically relative to the pressing piece. The pressing piece has a drive cam surface 32 on the outside and a return cam surface 33 on the inside. When the operating rod 27 rises, the driving cam member 28 acts on the cam surface 32 to swing the pressing piece toward the die 24. When moving, the return cam member 29 acts on the cam surface 33 to swing the pressing piece 25 in the original direction. It is also possible to form a return cam surface on the outside of the pressing piece and provide a return cam member to act on the return cam surface.

The upper part of the pressing piece is a thin part 34,
The wall thickness of this portion is sufficiently small and long enough that no bending stress that would cause breakage occurs at a normal swing angle of the pressing piece. The support member 22 has locking portions 35 and 36 that engage with the pressing piece 25 below the thin portion 34 . These engaging parts are the die 2 of the pressing piece.
4, it engages with the pressing piece and restricts the displacement of the engaging portion when swinging in the direction toward or away from it. The term "restriction" also refers to a mode in which there is no play between the locking part and the pressing piece and the displacement of the engaging part in the swinging direction is prevented from the beginning. This term also includes a mode in which it acts as a stopper to prevent rocking displacement after a certain amount of rocking displacement.

As described above, when the displacement of a portion of the pressing piece in both swing directions is restricted below the thin portion 34,
During operation, unintended deflection can be prevented as shown in FIG. 5, and therefore, the thin portion only undergoes bending deformation commensurate with the swing angle of the pressing piece, thereby preventing the generation of large stress.

In the example shown in FIG. 1, the shoulder 37 supports the upward force applied to the pressing piece and prevents or alleviates the transmission of force that would cause buckling to the thin-walled portion 34. It can be omitted depending on the magnitude of the upward force.

FIG. 2 shows another embodiment of the present invention, and parts not particularly explained in the following description have the same properties as the elements with the same reference numerals in the example of FIG. In this example, a compression spring 41 is provided between the pressing piece 25 and the die 24 instead of the return cam member. The drive device 26 has a lever 42, and both ends of the lever are connected to sockets 43 provided on the pressing piece 25, respectively, and when the operating rod 27 fixed to the operating rod 27 is lowered, the pressing piece 25 is moved to the die 24 via the lever 42. The situation is becoming more and more swayable. Container sealing devices often handle liquids containing sugars, and such liquids adhere to sliding surfaces, creating extremely high friction and, in some cases, causing parts that should be sliding relative to each other to stick together. By doing as in this example, the sliding area can be made small, and the frictional resistance of the sliding surface does not act to apply a large force in the vertical direction to the pressing piece as in the case of the cam surface.
It is possible to prevent unintended force from being applied to the pressing piece.

Effects of the Invention According to the present invention, it is possible to prevent unintentional deflection of the thin wall portion of the pressing piece, and therefore, the life of the pressing piece can be extended.

[Brief explanation of the drawing]

Fig. 1 is a partial longitudinal cross-sectional view of one embodiment of the present invention; Fig. 2 is a partial longitudinal cross-sectional view of another embodiment of the present invention; Fig. 3 is a conventional art on which the present invention is based. Fig. 4 is a perspective view of the pressing piece used in the device shown in Fig. 3; Fig. 5 is an explanatory diagram showing the deflection during operation when the pressing piece is provided with a thin section. It is. 1... Container body, 3... Polymerization part, 4... Die,
5... Pressing piece, 26... Drive device, 28... Drive cam member, 29... Return cam member, 30... Return device, 35, 36... Locking portion, 41... Compression spring, 42... Lever, 44...operating plate.

Claims (1)

[Claims for Utility Model Registration] (1) A cylindrical container body and an end plate member forming an overlapping part with the body along the edge of the body,
a die that is a device for adhering and sealing each other and is disposed on one of the inside and outside of the overlapping part;
a plurality of pressing pieces disposed on the other side and sandwiching the overlapping portion between the die and applying pressure thereto; the pressing pieces are fixed to the supporting member or integrally formed with the supporting member; In a container sealing device comprising a plurality of elastically deformable members, the container is provided so as to reciprocate relative to the pressing piece, and when moving in one direction, the pressing piece is swung toward the overlapping portion. and a return device that presses the pressing piece in the direction so that the pressing piece returns to the direction away from the overlapping portion when the driving device moves in the other direction, and the pressing piece is moved in the other direction. The pressing piece has a thin part on its upper part to give it elastic deformability,
The container sealing device further comprises a locking portion that engages with the pressing piece below the thin-walled portion and restricts displacement of the engaging portion of the pressing piece in both swing directions. (2) Utility model registration In the device according to claim 1, the drive device has a drive cam member, and the return device has a return cam member that moves together with the drive cam member. Characteristic sealing device for containers. (3) Utility model registration In the device according to claim 1, the drive device includes an actuation plate that moves relative to the pressing piece, and a lever inserted between the actuation plate and the pressing piece. A container sealing device characterized in that the angle of the lever is changed by the displacement of the actuating plate, thereby swinging the pressing piece toward the die. (4) Utility Model Registration The container sealing device according to claim 1, wherein the return device is a compression spring provided between the pressing piece and the die.