JPH0322082Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a lid tightening device for fitting a lid onto a container body.

[Conventional technology]

Plastic containers for food packaging, in which the peripheral wall of a recess formed in the lid fits inside the opening of the container body, are usually used for the purpose of maintaining airtightness and preventing the lid from separating during transportation. The outer diameter of the circumferential wall of the recess is larger than the inner diameter of the opening of the container body, or the fitting portion of the two is formed into a downwardly expanding tapered surface. For this reason, when attaching the lid to the container body, it is necessary to press fit the peripheral wall of the concave portion of the lid into the inside of the container body, making attachment of the lid time-consuming.

In Japanese Utility Model Publication No. 51-32751, a cylindrical protrusion is formed on the lower surface of the elevator plate, and a slideable presser plate placed inside the cylindrical protrusion is pressed downward by a spring. A cup lid holding device is disclosed in which the lid is attached to the container by pressing down the center portion of the lid placed on the opening of the container using a pressing plate that descends together with the plate.

[The problem that the idea attempts to solve]

However, the above-mentioned device is inefficient because it closes the containers one by one.
Moreover, since the center part of the lid is pressed down by a presser plate, the circumferential wall of the recess of the lid fits into the opening of the container all around at the same time, making it necessary to attach the lid by press-fitting. In some containers, there is a risk that air will be trapped inside the container, resulting in a poor fit.

Therefore, this idea solves the above disadvantages,
The technical problem is to make it possible to attach the lid extremely easily, reliably and efficiently while eliminating air inside the container body.

[Means to solve the problem]

In order to solve the above problems, this invention provides a cylindrical container holder capable of supporting a flange formed at the opening edge of the container body on the pallet that is transported in one direction, and A lid tightening roller is disposed and supported so as to be movable up and down, and a pressing means for pressing the lid tightening roller downward is provided, and the lid is moved so that the lower outer periphery of the lid tightening roller is located below the locus of movement of the upper surface of the container receiver. The lowering position of the tightening roller is regulated, and a pressing member for pressing and deforming the center part of the lid placed on the upper part of the container body is placed in front of and close to the lid tightening roller so as to be movable up and down. The pressing member is lowered by a spring or a lifting device.

[Effect]

In the lid tightening device configured as described above, the container body is fitted inside the container receiver, the lid is placed on top of the container holder, and a part of the circumferential wall of the recess of the lid is fitted inside the opening of the container body to tighten the pallet. When moved in one direction, the lid tightening roller rides on the top of the front end of the lid and pushes that part down, and as the pallet moves, the concave peripheral wall of the lid is fitted into the opening of the container body from the front end to the rear end. . During the fitting process,
The pressing member presses down the upper surface of the recess of the lid, deforming the upper surface of the recess downward. Due to the deformation, the circumferential wall of the concave portion is slightly displaced inward, making it easier to fit inside the container body, and the tightening member presses downward on the easily fitted portion, so that the circumferential wall of the concave portion is displaced inside the container body. The lid tightening work is completed when the pallet passes through the mounting position of the lid tightening roller.

〔Example〕

As shown in FIGS. 1 and 2, the pallet conveying device 1 has an endless chain 3 extending between a pair of front and rear sprockets 2, and a large number of pallets 4 are attached to the chain 3 at equal intervals. This pallet conveying device 1 is driven by a suitable drive device and moves in the direction of the arrow in FIG.

As shown in FIG. 2, the pallet 4 has a cylindrical container receiver 5 formed therein, and when the container body A is dropped into the container receiver 5, a flange B formed at the opening edge of the container body A opens. It is supported by the upper end surface of the container support 5.

A roller support frame 6 is provided in the middle of the upper conveyance path of the pallet 4, and a lid tightening roller 7 is provided inside the roller support frame 6, and in front of this roller 7, a roller support frame 6 is provided.
A pressing member 8 consisting of a roller is arranged in a close position.

The lid tightening roller 7 pushes down the lid C placed on the container body A, and tightens the concave peripheral wall D of the lid C to the container body A.
Two pieces may be used to push down both sides of the lid C, or one piece may be used to extend between both side edges of the lid C. A bracket 9 that supports this lid tightening roller 7
is equipped with a rod 10, the upper part of which passes through the horizontal support plate 11 of the roller support frame 6 and protrudes upward, and a head 1 for preventing it from coming off is provided at its upper end.
2 is provided and its protrusion 12 engages with the upper surface of the support plate 11, the lower portion of the outer periphery of the lid tightening roller 7 is located below the locus of movement of the upper surface of the container receiver 5. Also, on the outside of Rod 10,
A spring 13 is fitted to push the lid tightening roller 7 downward.

On the other hand, the pressing member 8 serves to press down the upper surface of the concave portion of the lid C, and its length in the axial direction is appropriately determined depending on the size of the lid C. Similar to the lid tightening roller 7, this pressing member 8 is also
The rod 15 provided on the bracket 14 is the support plate 11.
is supported so as to be able to rise and fall by a spring 1
6, and the retaining head 17 provided at the upper end of the rod 15 is in contact with the upper surface of the support plate 11, the lower part of the pressing member 8 is
It is located below the movement trajectory of the upper surface of the concave portion of the lid C placed on the container body A.

The lid tightening device shown in the embodiment has the above-mentioned configuration, and this lid tightening device supplies the container body A to the inside of the container receiver 5 that moves in the direction of the arrow in FIG. 1 at a position in front of the roller support frame 6. , lid C on top of it
, and the front end of the concave peripheral wall D of the lid C is placed on the second
As shown in the figure, it is fitted inside the container body A.

Here, as a container to be capped, an outer cylindrical part E is provided on the outer periphery of the lid C, and a flange B of the container body A is provided inside the outer cylindrical part E, and a folding part formed on the outer periphery of the flange B is used. The curved pieces F fit together, the outer diameter of the circumferential wall of the recess of the lid is larger than the inner diameter of the opening of the container body, and the lid is attached by press-fitting, or the recess of the lid The outer circumferential surface of the peripheral wall and the inner circumferential surface of the opening of the container body may each be tapered surfaces that widen downward. Moreover, the shape does not matter.

Now, when the pallet 4 supporting the container body A and the lid C moves to the position of the roller support frame 6, the pressing member 8 rides on the front end of the upper surface of the lid C, as shown in FIG. 2, and then the lid is tightened. The roller 7 rides on the lid and completely fits the temporary fitting part of the recessed peripheral wall D of the lid.

When the recess of the lid C faces the position of the pressing member 8, the pressing member 8 creeps into the inside of the recess and presses the upper surface of the recess, as shown in FIG. For this reason, the upper surface of the recess is deformed downward, and due to the deformation, the peripheral wall of the recess is slightly displaced inward, making it easier to fit inside the container body A. On the other hand, the rear lid tightening roller 7 is pressed against the upper surface of the lid C. In order to push in, the recess peripheral wall D is
It is fitted into the inside of the container main body A in sequence from the front end to the rear end of both sides, and by passing through the mounting position of the lid tightening roller 7, the entire concave peripheral wall D is fitted inside the container main body A, and the lid tightening operation is completed. is completed.

In the case of the embodiment, the container main body A was shaped to fit almost snugly into the inside of the container receiver 5, but the inner surface shape of the container receiver 5 is not limited to this.
It is sufficient that the container main body A can be stably supported.

Further, in the case of the embodiment, the pressing member supported so as to be able to rise and fall is pushed down by a spring, but it may be moved down by a lifting device such as a cylinder in synchronization with the movement of the lid. .

〔effect〕

As described above, according to this invention, the lid is placed on the container main body supplied to the container receiver, and the front end of the recessed peripheral wall of the lid is temporarily fitted inside the container main body, and the container is transported in one direction. The lid can be attached by a simple operation, and the lid tightening operation is extremely easy and the lid can be tightened efficiently.

In addition, since the circumferential wall of the concave portion of the lid is fitted sequentially from the temporarily fitted front end to the rear end, the lid can be tightened while eliminating air inside the container body, and the lid can be tightened at the front end of the lid tightening roller. The upper surface of the concave portion of the lid deforms downward due to the lowering of the pressing member located at the top of the lid, and this deformation causes the peripheral wall of the concave portion to displace a little inward, making it easier to fit inside the container body, and in this state, the lid is tightened. Since the roller pushes down the top surface of the lid, the peripheral wall of the recess fits smoothly into the inside of the container body, making it possible to securely close the lid.

Furthermore, the lid tightening roller presses down the flange of the container main body supported at the upper end of the container receiver and the outer periphery of the lid that overlaps the flange, so the lid tightening pressure is always constant and leakage of the filling from the outside due to over-tightening of the lid is prevented. can be prevented.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the lid tightening device according to the invention, and FIGS. 2 to 4 are sectional views showing the lid tightening operation state of the same device step by step. 4... Pallet, 5... Container holder, 7... Lid tightening roller, 8... Pressing member, 13, 16... Spring.

Claims (1)

[Scope of utility model registration request] A cylindrical container support capable of supporting a flange formed on the opening edge of the container body is provided on a pallet that is conveyed in one direction, and a lid tightening roller is arranged movably up and down above the conveyance path of the pallet to tighten the lid. A pressing means for pressing the roller downward is provided, and the lowering position of the lid tightening roller is regulated so that the lower part of the outer periphery of the lid tightening roller is located below the locus of movement of the upper end surface of the container receiver, A pressing member for pressurizing and deforming the central part of the lid placed on the upper part of the container body is arranged in a position close to this so as to be movable up and down.
A container lid tightening device in which the pressing member is lowered by a spring or a lifting device.