JPH075137B2 - Container lid - Google Patents

Description

TECHNICAL FIELD The present invention relates to a container lid, and more particularly to a structure for sealing the lid with respect to the container body.

<Prior Art> Conventionally, for example, in a manufacturing process of pharmaceuticals, foods, chemicals, and the like, containers for storing raw materials, intermediate products, final products, and the like have been used.

This container is provided with an opening serving as a filling / extracting port for articles, and is equipped with a lid for opening and closing the opening. The lid is provided with clamp type or clamp band type tightening means, and the lid is opened and closed manually.

The clamp type is configured as shown in FIGS. 11 to 13. Further, the clamp band type is configured as shown in FIG.

In the clamp type shown in FIGS. 11 to 13,
The lid 49 is placed on the opening 47 of the container body 46, and the engaging recess 50 formed on the lid 49 and the engaging projection 48 formed on the container body 46 are engaged with each other through the packing 51, and the container body 4 to 46 on the outer peripheral surface
Engagement recess 50 and engagement protrusion with clamp 52 equipped with multiple pieces such as five
The lid 49 is fastened and fixed to the container main body 46 so that the and 48 are pressed against each other via the packing 51. As the packing 51, there is one that is previously bonded to the inner surface of the engaging recess 50 as shown in FIG. 10 or one that is put on the engaging projection 48 as shown in FIG.

Further, as the clamp 52, the one in which the hook portion 52a is engaged with the outer surface of the engaging recessed portion 50 as shown in FIG. 11 or the ring portion 52b is provided in the outer surface of the engaging recessed portion 50 as shown in FIG. Some are engaged with the fixedly mounted hooks 53.

On the other hand, in the clamp band type shown in FIG. 14, the clamp band 54 is disposed around the engaging recess 50 and the engaging protrusion 48 in the engaged state, and the inner periphery of the clamp band 54 is After inserting the engaging recess 50 and the engaging projection 48 into the groove 55 so as to sandwich the engaging recess 50, the clamp 58 and the hook 59 are engaged with each other as shown in FIG. And engaging protrusion 48
The lid 49 is attached to the container body so that
It is tightened and fixed to 46.

However, the conventional container tightening structure as described above has the following problems.

That is, in the clamp type, first, the positions (directions) of the ring portion 52b and the hook 53 need to be matched. Further, the clamp operation becomes impossible unless a plurality of clamps 52 provided on the outer peripheral surface of the container body 46 are operated at the same time when the container is closed.
In other words, if only one clamp 52 is operated, the part of the lid 49 on the side of the clamp 52 that is not operated floats up, and when the other clamp 52 is operated next, the ring portion 52b cannot be hooked on the hook 53, 52 cannot be operated.

In this case, if the hook portions 52a or the ring portions 52b of all the clamps 52 are hooked in advance in the corresponding engaging recessed portion 50 positions or the hooks 53, the lift of the clamps 52 can be reduced, but the handle portion 52c is maximally jumped up. After all, a lot of force is required for the clamp operation.

With the clamp band type, it is difficult to align the engaging recess 50 and the engaging protrusion 48 when they are inserted in the groove 55 so as to be sandwiched therebetween. This is remarkable as the diameter of the container increases.

It is conceivable to automate the above clamp operation to improve operability, but it is difficult to realize because the structure is complicated and the cost is high. .

Among the conventional problems described above, as a lid structure that solves the problems of opening and closing the container, there is a conventional structure as disclosed in JP-A-60-68257.
Gazette, Japanese Utility Model Publication No. 59-23995 and Japanese Utility Model Publication No. 63-97664.
As disclosed in Japanese Patent Laid-Open Publication No. JP-A-2003-264, a shape memory alloy is known. However, in such a configuration, since an expensive metal such as titanium or nickel is used as the shape memory alloy, the manufacturing cost of the container itself becomes expensive,
Not practically applicable.

On the other hand, as disclosed in JP-A-61-190453, an engagement member made of a shape memory resin is joined to a lid main body made of polyethylene or polypropylene, and the engagement member is provided around the upper end opening of the container main body. There is one in which the lid and the container main body are fastened and fixed by fitting the convex portion in a target temperature range.

<Problems to be solved by the invention> However, when a lid like this is manufactured and tested,
Unexpectedly, the following problems were found to occur.

That is, in order to recover the shape from the characteristics of the shape memory resin itself, it is necessary to raise the temperature to, for example, about 60 to 90 ° C. When the shape memory resin is heated to such a high temperature, the polyethylene or polypropylene forming the lid main body around it is also softened at a high temperature, which is a base point for restoring the shape.
The joint portion between the lid main body and the shape memory resin engagement member is easily moved (the shape recovery base point is moved by thermal deformation of the lid main body), and even if the engagement member returns to the memorized shape, The engagement state between the mating member and the convex portion on the container body side is deviated, so that the engagement itself cannot be performed or the engagement state is deteriorated. Further, since the shape memory resin is softened at the above-mentioned high temperature, the joint between the lid main body portion and the shape memory resin engaging member cannot be maintained, and there is a problem that both are easily detached.

As a countermeasure for such a problem, it is possible to form the entire lid with a shape memory resin, but it takes a longer time to recover the shape of the shape memory resin than a shape memory alloy, and it takes time and work. Although it is cheaper than memory alloy, it is undeniably expensive as well.

Therefore, in view of the above conventional problems, the present invention utilizes a shape memory resin having properties different from metal such as plastic properties and rubber-like elasticity while maintaining the engagement state of the lid with the container body. It is an object of the present invention to provide a lid for a container that can easily open and close the lid.

<Means for Solving the Problems> Therefore, the lid of the container of the present invention is mounted on the metal plate member so as to cover at least the end portion of the metal plate member, and to install the plate of a predetermined length from the end edge. And an engaging piece made of a shape-memory resin imparted with shape recovery so as to engage with the container body at a predetermined temperature range, and the end portion of the metal plate member is provided with the end portion. A through hole for locking the shape memory resin covering the upper surface and the shape memory resin covering the bottom surface of the end portion is provided.

Examples of the shape memory resin include trans-poly-isoprene-based resin, poly-norbornene-based resin, and styrene-butadiene-based resin.

For example, the styrene-butadiene hybrid shape memory resin that can be preferably used in the present invention uses the temperature difference between the softening point of polystyrene and the melting point of crystalline polybutadiene to memorize the shape. The shape can be memorized by cooling to room temperature while maintaining its shape.

Then, at about 60 to 80 ° C, only the polybutadiene part melts and the polystyrene part does not soften, so it can be freely deformed by external force while memorizing the original shape. Is fixed. When this is heated again to 60 to 80 ° C., only the polybutadiene crystal part melts and the memorized original shape is restored.

The shape memory resin used in the present invention is not particularly limited as long as it can be formed into an arbitrary shape and has an action capable of recovering to a predetermined shape, but the lid and the container body are set by setting the lid on the container body. Is appropriately selected according to the deformation temperature at the time of fixing.

The shape memory resin engagement piece is formed into a circular truncated cone peripheral surface shape or a cylindrical peripheral surface shape that extends a predetermined length from the peripheral edge of the metallic plate member and is continuous in an annular shape, and is easily deformed to the lower end portion if necessary. May be provided with a notch as described above, or may be formed into a plate shape extending a predetermined length from a plurality of edges of the plate member and not connected in an annular shape, in short, a member provided on the outer surface of the container body or on the outer surface of the container body. If there is a mating member, it may have any shape as long as it can be engaged with the engaging member forming a part of the container body and fix the container body and the lid.

Further, the metal plate member may be a metal that does not cause large thermal deformation at the deformation temperature of the shape memory resin formed body, and one having high thermal conductivity such as stainless steel, steel plate, copper or aluminum. preferable.

<Operation> In such a configuration, the lid is attached to the container body by, for example, inclining the engaging piece to have a substantially frustoconical peripheral surface shape or a substantially cylindrical peripheral surface shape, so that the lid can be easily attached to the opening of the container main body. Start from the state of being fixed at room temperature.

Next, the lid is placed on the opening of the container body. In this state, the engagement piece is in a state of protruding obliquely downward from the position of the upper outer peripheral surface of the container body or in a state of hanging down.

When the placement of the lid on the opening of the container body is completed, for example, warm air is blown onto the engaging piece to heat the engaging piece. By this, the shape memory resin is restored to the memorized original shape,
The engagement piece engages with the container body.

At that time, even if the shape-memory resin is heated to restore the shape, the peripheral edge of the metal plate member takes away heat and transfers it to other parts. The joint base point (near the peripheral edge of the plate member) between the portion and the engagement piece of the shape memory resin is less likely to be thermally deformed, and when the shape of the shape memory resin engagement piece is restored to the stored original shape, it is in a predetermined position. Since it returns, it is possible to maintain good joining with the container body.

Therefore, the means for heating the engagement piece of the shape memory resin need not strictly heat only the engagement piece, and various means can be adopted.

Further, since the portion for heating the shape memory resin is not the entire lid but a partial portion, the shape recovery time is short.

Next, for example, cold air is blown onto the engagement piece to cool the engagement piece. As a result, the shape memory resin engagement piece is fixed to the stored original shape.

Since the attachment of the lid is completed by the above, there is no need to apply external force when attaching the lid unlike the clamp type, and there is no difficulty in positioning like the clamp belt type, so the lid installation work Easy to do.

On the other hand, to remove the lid, for example, warm air is blown onto the engaging piece of the lid. When the engaging piece is heated, it can be freely deformed by an external force while memorizing the original shape.Therefore, by moving the lid from the opening of the container body, the engaging piece and the container body are engaged. The state is released and the lid removal is completed.

Since the removed lid waits for the next attachment, as described above, the engaging piece is fixed at room temperature in a shape that makes it easy to attach the lid to the opening of the container body such as the shape of the peripheral surface of the cone. To do.

Since a through hole for locking the shape memory resin is provided in the through hole at the end of the metal plate member, the shape memory resin covering the upper surface of the end through the through hole and the bottom surface of the end. (Bottom surface)
The shape memory resin that covers the unit is integrally molded or integrated with an adhesive or the like, the metal plate member and the engaging piece are firmly joined, and even if the shape memory resin softens at high temperature, the metal The joined state of the plate member and the engagement piece is maintained, and both are difficult to come off.

In addition, the lid is less expensive than the lid that uses a shape memory alloy or the lid that is entirely formed of shape memory resin, and the manufacturing cost of the container itself can be reduced.

<Example> Hereinafter, an example of the present invention is described based on a drawing.

1 to 3, a container 1 comprises a container body 3 having an opening 2 for filling and unloading articles, and the opening 2
And a lid 4 according to the present invention for opening and closing.

The upper surface of the cylindrical container body 3 is open to form the opening 2. Around the opening 2 of the container body 3, a pipe-shaped engaging convex portion 5 is formed in which the opening edge portion is curved outwardly in an annular shape and continues in an annular shape.

The lid 4 is composed of a metal plate member 6 made of metal such as stainless steel and an engaging piece 8.

In the present embodiment, the metal plate member 6 is formed in a circular shape, and an annular curved portion 6a, which is curved in a substantially arc shape so that the outer surface is convex and the inner surface is concave, is formed on the peripheral edge portion thereof. ing. Therefore, a concave portion 6b having the curved portion 6a on its periphery is formed in the central portion of the metal plate member 6.

The metal plate member 6 is provided with the above-mentioned engagement piece 8 which is mounted so as to cover the peripheral edge thereof, extends from the peripheral edge of the metal plate member 6 to a plate shape for a predetermined length, and is annularly continuous. There is.
The engagement piece 8 is formed of a shape memory resin having a shape recovery property that fits into the engagement projection 5 of the container body 3 in a fit state in a predetermined temperature range. Further, the engagement piece 8 is provided with a notch in the lower end portion of the engagement piece 8 as necessary so that the engagement piece 8 can be easily deformed and fitted into the engagement convex portion 5 of the container body 3.

The peripheral end portion of the metal plate member 6, that is, the tip end portion of the curved portion 6a is penetrated for locking (fixing) the shape memory resin of the engaging piece 8 covering the tip end portion to the peripheral end portion. A plurality of holes are provided. In this embodiment, as the through holes, as shown in FIG. 2 and FIG. 3, a plurality of slits 7 of a predetermined length extending along the circumferential direction of the tip portion of the curved portion 6a are adopted, and each slit 7 is formed. A shape memory resin that covers the upper surface of the peripheral edge of the metal plate member through the slits 7 at predetermined intervals at the tip of the curved portion 6a, and a shape that covers the bottom surface (lower surface) of the peripheral edge. Since the memory resin is integrated and the shape memory resin is fitted therein, the engagement piece 8 is prevented from being easily separated from the metal plate member 6.

The other container 1 is placed in the recess 6b of the lid 4 configured as described above.
The main body 3 can be placed and supported.

Next, in explaining the operation of attaching and detaching the lid 4 configured as described above to and from the container body 3, an example of using the following lid opening / closing device 9 will be shown in the present embodiment.

That is, in FIG. 4, a plurality of belt conveyors 11, 12, and 13 are linearly arranged on the installation surface 10. The lid opening / closing device 9 is disposed above the belt conveyor 12.

This lid opening / closing device 9 can be deformed by an external force while memorizing the original shape of the air or the engaging piece 8 in a specific temperature range for deforming to the tightening and fixing side due to the memory effect of the engaging piece 8 of shape memory resin. A discharging means for discharging the air in a specific temperature range to bring the state toward the engaging piece 8, a lid holding means for holding the lid 4 (the metal plate member 6), the discharging means and the lid holding means. And a moving means for moving integrally.

The structures of the discharging means and the lid holding means are as follows.

In FIG. 5, a discharge ring forming a part of the discharge means
A large number of fluid discharge holes 16 (FIGS. 7 and 8)
(See the figure) is formed. One end of each of four fluid supply pipes 17 is communicatively connected to each of the four locations on the upper peripheral surface of the discharge ring 14 that are separated by 90 degrees. This 4
The other end of each of the fluid supply pipes 17 extends upward, then bends inward while curving, and is formed in a cylindrical connection member 18 that extends upward along the central axis of the discharge ring 14. Each of the channels 18a is connected for communication. A pipe body 20 is connected to the outer peripheral surface of the connecting member 18 so as to communicate with the fluid introduction passage 18a, and an introduction pipe 19 for introducing air heated to a predetermined temperature from an air supply source (not shown) is connected. ing.

The cage 15, which constitutes a part of the lid holding means, has a suction cup structure, and is formed of rubber or the like into a substantially bowl shape whose lower surface is opened. The cages 15 are arranged inside the discharge ring 14 at four locations spaced by 90 degrees. in this case,
The open surface of the retainer 15 faces a surface which is parallel to the plane formed by the lower peripheral surface of the discharge ring 14 and slightly above the plane. At the center of the upper surface of each cage 15, a tubular body 21
One end of the is connected for communication. The other end of the pipe body 21 is connected to the lower peripheral surface of the gas suction ring 22 so as to communicate therewith. One end of the gas suction pipe 23 is communicatively connected to four locations on the inner circumferential surface of the gas suction ring 22 that are separated by 90 degrees, and the other end of the gas suction pipe 23 is connected to the connecting member 18 Are connected to the gas suction passages 18b formed in each. A pipe 25 is connected to the outer peripheral surface of the connecting member 18 so as to communicate with the gas suction passage 18b and to which a suction pipe 24 from a gas suction device (not shown) is connected.

On the other hand, the moving means is configured as follows.

In FIG. 4, a pair of struts 26 are erected on both sides of the belt conveyor 12 at a predetermined distance in a direction parallel to the traveling direction of the belt conveyor 12.
The upper end portions of the pair of columns 26 are connected to each other by the horizontal rail member 27.

A pair of rail members 28, each having a U-shaped cross section, are bridged between the intermediate portions in the longitudinal direction of the horizontal rail member 27 with their open surfaces facing each other. Both ends are connected to the lower surface of the horizontal rail member 27. Further, a moving body 29 that moves while being guided and supported by the rail member 28 is provided. Four drive wheels 29a, each of which is rotationally driven, are rotatably supported at both ends of the moving body 29. The drive wheels 29a are placed and supported on a horizontal plate inside the rail member 28. To be done. And this moving body 29
And the connecting member 18 are connected via two robot arms 30 and 31.

The two robot arms 30 and 31 have arms 30a and 31a whose one ends are rotatably connected to ends of connecting parts 32 and 33 formed on the outer peripheral surface of the connecting member 18, respectively. 3
An arm whose one end is rotatably connected to each of the other ends of 1a, and whose other end is rotatably connected to the ends of two connecting portions formed to project on the side surface of the moving body 29. 30
b and 31b, respectively.

An end portion of the main body of the cylinder device 34 is rotatably connected to the lower surface of the moving body 29. The tip end portion of the piston rod 34a of the cylinder device 34 is rotatably connected to the arm 30a of one robot arm 30.

In the moving means having such a configuration, the connecting member 18 is moved by the movement of the moving body 29 along the rail member 28, and the discharge ring 14 is moved.
The holder 15 and the holder 15 can be slid in a direction traversing the belt conveyor 12. Further, the connecting device 18 can be moved up and down and the discharge ring 14 and the retainer 15 can be moved up and down by expanding and contracting the two robot arms 30, 31 by the cylinder device 34.

A pair of fixing devices 35 for fixing the container body 3 placed and supported on the belt conveyor 12 are provided at both sides of the belt conveyor 12. The fixing device 35 has a pair of arms 37, 38 whose lower ends are rotatably supported at two positions separated from each other by the support base 36 and extend upward.
A rod 39 that is horizontally rotatably connected to the upper ends of the arms 37 and 38 and extends horizontally; a pressing member 40 that can contact the outer surface of the container body 3 at the tip of the rod 39;
The body is rotatably connected to the upper surface of the piston rod 41
a Cylinder device 41 whose front end is rotatably connected to one arm 37. A pad 42 made of an elastic material is fixedly attached to the pressing surface of the pressing member 40.

According to this fixing device, the arms 37 and 38 are tilted by the expansion and contraction operation of the cylinder device 41, the rod 39 is moved back and forth, the pressing member 40 is moved back and forth, and the container body 3 can be clamped from both sides and fixed. It has become.

A mounting support table 43 for the lid 4 is arranged at a position lateral to the belt conveyor 12 in the moving path of the discharge ring 14 and the holder 15, that is, at a lateral position of one fixing device 35.

As shown in FIG. 6, the mounting support table 43 has a circular recess 43a on the upper surface and an annular projection 43b projecting upward from the peripheral portion of the upper surface. The outer peripheral surface is formed in the shape of a circular truncated cone whose diameter gradually increases from the upper side to the lower side.

The mounting support table 43 is for fixing the engagement piece 8 of the lid 4 attached to the container body 3 to a predetermined shape so that the lid 4 can be easily set on the container body 3.

Next, a method of attaching and detaching the lid to and from the container body 3 by the lid handling device 9 described above will be described.

First, a method of attaching the lid 4 will be described.

The attachment of the lid 4 is started from a state where the lid 4 is placed and supported on the placement support table 43.

That is, as shown in FIG. 6, the bottom surface of the recess 4a of the lid 4 is contacted and supported on the bottom surface of the mounting support table 43 inside the recess 43a,
The peripheral portion of the lid 4 rides over the annular convex portion 43b of the mounting support 43 to reach the outside, and the engagement piece 8 is in contact with the outer peripheral surface of the annular convex portion 43b. As a result, the engagement piece 8 is fixed to a shape that matches the outer peripheral surface of the annular convex portion 43b, that is, a truncated cone peripheral surface shape at room temperature.

The lid 4 supported by the mounting support table 43 as described above
Another lid 4 can be placed on top of the
Can be placed on top of each other.

In this case, as shown in FIG. 6, the engagement piece 8 of the upper lid 4 is
Is in contact with the outer peripheral surface of the engaging piece 8 of the lower lid 4, and the engaging piece 8 of the upper lid 4 conforms to the outer peripheral surface of the engaging piece 8 of the lower lid 4 at room temperature. Fixed to.

Next, the container body 3 is placed on the belt conveyor 13, the belt conveyors 13 and 12 are driven, and when the container body 3 comes to a predetermined position on the belt conveyor 12, the belt conveyor 13
Stop driving 13,12.

Then, the cylinder device 41 of the fixing device 35 disposed at each of both sides of the belt conveyor 12 is driven to the extended state, the rod 39 is moved forward by the tilting of the arms 37, 38, and the pressing member 40 is moved forward. By sliding, the container body 3 is clamped and fixed from both sides.

After the above, the moving body 29 is driven to stop the holder 15 at a position above the lid 4 mounted and supported on the mounting support base 43,
Next, the cylinder device 34 is driven to the extended state, the holder 15 is moved downward and brought into contact with the upper surface of the recess 6b of the lid 4. In this state, a gas suction device (not shown) is operated to hold air through the pipe body 21, the gas suction ring 22, the gas suction pipe 23, the gas suction passage 18b of the connecting member 18, the pipe body 25 and the suction pipe 24. Bowl 1
Aspirate from 5. Then, the inside of the cage 15 and the recess 6 of the lid 4
The pressure between the upper surface and the upper surface is reduced and the lid 4 is adsorbed. Next, the cylinder device 34 is driven to the contracted state, the holder 15 is moved upward, and then the moving body 29 is driven to mount the holder 15 on the belt conveyor 12 and the container main body 3 is supported. , The cylinder device 34 is driven to the extended state, and the lid 4 sucked and held by the holder 15 is moved downward and placed on the upper end of the container body 3. In this state, as shown in FIG. 7 (a), the bottom portion of the recessed portion 6b of the lid 4 is inserted into the inside of the opening 2 of the container body 3, and the curved portion of the peripheral portion of the lid 4 is inserted into the container body 3. Is overlapped with the upper outer peripheral surface of the engaging projection 5. Further, the engagement piece 8 is in a state of protruding obliquely downward from the position of the upper outer peripheral surface of the engagement convex portion 5.

When the placement of the lid 4 on the upper end of the container body 3 is completed, the gas suction from the gas suction device is stopped, and the suction pipe 24 is opened to the atmosphere by a switching device (not shown) to allow air to flow into the suction pipe 24. The pressure reduction state between the inside of the cage 15 and the upper surface of the recess 6b of the lid 4 is released, the suction holding of the lid 4 is released, and the warm air from the air supply source (not shown) is introduced into the introduction pipe 19,
The pipe body 20, the fluid introduction path 18a of the connection member 18, and the fluid supply pipe 1
7 to the discharge ring 14 and the hot air is discharged to the discharge ring 14
The fluid is discharged from a large number of fluid discharge holes 16 in the inner peripheral portion of the. The discharged warm air is blown onto the engagement piece 8 to heat the engagement piece 8. The warm air temperature is, for example, about 60 to 80 ° C.

Therefore, the shape memory resin forming the engagement piece 8 is
It deforms as shown in FIG. 7 (b), and finally recovers to the stored original shape as shown in FIG. 7 (c), and the engaging piece 8 is tightened on the engaging convex portion 5 of the container body 3. Fit in

Next, cold air from an air supply source (not shown) is discharged from the fluid discharge hole 16 of the discharge ring 14 via the same path. The discharged cool air is blown onto the engaging piece 8 to cool the engaging piece 8.

Therefore, the shape memory resin forming the engagement piece 8 is fixed to the stored original shape.

The suction holding of the lid 4 may be released after the engaging piece 8 is fitted to the engaging convex portion 5 of the container body 3 with warm air and cold air.

With the above, the attachment of the lid 4 is completed.

When the attachment of the lid 4 is completed, the cylinder device 34 is driven to the contracted state, the holder 15 is moved upward, and then the moving body is moved.
29 is driven to stop the holder 15 at a position above the placement support table 43, and waits for the next holding of the lid 4.

Further, the cylinder device 41 of the fixing device 35 is driven to the contracted state,
The rod 39 is slid backward by the tilting of the arms 37 and 38, and the pressing member 40 is moved backward to release the fixation of the container body 3. After that, the container body 3 with the lid 4 attached thereto is conveyed to the end position of the belt conveyor 11 by driving the belt conveyors 12 and 11, and from there, the automatic conveyance vehicle of FIG.
It is moved to a position 44 and is transported to a destination by the automatic transport vehicle 44.

Next, a method for removing the lid 4 will be described.

Place the container with the lid on the belt conveyor 11,
The belt conveyors 11 and 12 are driven to convey the container body 3 to which the lid 4 is attached to a predetermined position on the belt conveyor 12.

Then, as described above, the container body 3 is fixed by the fixing device 35.
Hold it from both sides and fix it.

After the above, the moving body 29 is driven to stop the holder 15 at the upper position of the container 1, and then the cylinder device 34 is driven to the extended state to move the holder 15 downward to move the lid 4 of the lid 4. The recess 6b is brought into contact with the upper surface. In this state, the air is retained in the cage 15 as described above.
And the lid 4 is held by suction. Next, the hot air is guided to the discharge ring 14, and the hot air is discharged from the large number of fluid discharge holes 16 and blown onto the engaging pieces 8 (see FIG. 8A).

The engagement piece 8 is heated so that it can be freely deformed by an external force while memorizing the original shape. Then, the cylinder device 34 is driven to the contracted state to move the retainer 15 upward. Then, from the state shown in FIG. 8 (b) to the state shown in FIG. 8 (c), the lid 4 moves upward while being deformed from the curved state of the engagement piece 8 to the linearly extended state. To do. As a result, the fitting state between the engagement piece 8 and the engagement protrusion 5 is released. When this state is reached, the holder 15 is moved further upward, the moving body 29 is driven, and the holder 15 is stopped at a position above the mounting support table 43. Then, when the holder 16 is moved downward and the lid 4 is placed on the mounting support 43, the suction holding of the lid 4 is released, the holder 15 is moved upward again, and Wait until the lid 4 is removed.

The lid 4 is mounted on the mounting support 43, so that the engagement piece 8 is fixed in a shape that matches the outer peripheral surface of the annular convex portion 43b of the mounting support 43 at room temperature.

When the lid 4 is placed, warm air is ejected from the fluid ejection holes 16 so that the lid 4 easily has a shape that matches the outer peripheral surface of the annular convex portion 43b of the placement support table 43, if necessary. The operation of spraying on the piece 8 is performed.

As described above, the container body 3 with the lid 4 removed is
After releasing the fixing by the fixing device 35, the belt conveyor 1
It is conveyed to the end position of the belt conveyor 13 by the driving of 2, 13 and is transferred from here to an automatic conveyance vehicle 44 as shown in FIG. 4 (a), and is conveyed to the destination by the automatic conveyance vehicle 44. It

The lid 4 having the configuration of the above embodiment is attached to the metal plate member 6 so as to cover at least the peripheral edge of the metal plate member 6 and has a predetermined length from the peripheral edge of the metal plate member 6. It extends in a plate shape and is continuous in an annular shape, and engages with the container body 3 at a predetermined temperature range.
An engaging piece 8 made of a shape memory resin having a shape recovering property such that the metal plate member 6
As a result of providing the through hole 7 for locking the shape memory resin that covers the upper surface of the end and the shape memory resin that covers the bottom surface of the peripheral end, the following advantages are obtained.

That is, unlike the clamp type, it is not necessary to apply external force when attaching the lid, and like the clamp belt type,
The work of attaching the lid 4 can be easily performed, for example, there is no difficulty in positioning.

If necessary, the shape memory resin itself can also serve as a packing, and it is possible to eliminate the need for a packing that is difficult to clean, thus reducing the number of parts and simplifying part management.

Further, since the metal plate member 6 is provided with the slit 7 for locking the shape memory resin at the peripheral end portion, the shape memory resin on the upper surface of the peripheral end portion and the bottom surface (lower surface) of the peripheral end portion are provided through the slit 7. The shape memory resin is integrated with the metal plate member 6 and the engaging piece 8
Even if the shape memory resin is softened at a high temperature, the joined state between the metal plate member 6 and the engaging piece 8 is maintained, and it becomes difficult for the two to come off.

Furthermore, even if the engagement piece 8 is heated to restore the shape,
Since the peripheral edge of the metal plate member 6 absorbs heat and transfers the heat to the other part of the metal plate member 6, the joint base point of the peripheral edge of the metal plate member 6 and the engagement piece 8 which is the base point for restoring the shape ( Metal plate member 6
The vicinity of the peripheral edge portion is hard to be thermally deformed (hard to move), and the engagement state between the lid 4 and the container body 3 can be kept good.

Moreover, since the portion of the lid 4 to be heated is not the entire lid but only the engaging piece 8, the shape restoration time is short. Moreover, since the heating means of the engagement piece 8 does not have to strictly heat only the engagement piece 8, various means can be adopted and the opening and closing of the lid 4 can be easily automated.

Further, since the lid 4 is composed of a metal plate member 6 made of metal except for the peripheral portion, the lid 4 is stronger than a lid made of a shape memory resin, and the container 1 can be moved in a stacked manner. There is no problem in storing or storing.

Further, the price is lower than that using a shape memory alloy or the one in which the entire lid is made of a shape memory resin, and the manufacturing cost of the container itself can be reduced, which is practical.

In the present embodiment, the slit 7 is applied as the through hole formed in the peripheral end portion of the metal plate member 6, but the present invention is not limited to this. The point is that the shape memory resin on the upper surface of the peripheral end portion and the peripheral end portion are used. It suffices to provide a through hole that can be integrated with the shape memory resin on the bottom surface (lower surface) of the part.

In this embodiment, the shape memory resin engaging piece 8 covers only the peripheral end portion of the metal plate member 6, but the entire lower surface or the upper surface of the metal plate member 6 is made of the shape memory resin. It may be configured to cover.

Further, in the present embodiment, the engaging projection 5 having the opening edge curved outward in a ring shape is formed around the opening 2 of the container body 6, but as shown in FIG. The recess 6b) and the engaging protrusion 5 of the container body 6 may be eliminated.

Further, the engagement piece 8 of the shape memory resin is formed in a circular truncated cone peripheral surface shape or a cylindrical peripheral surface shape that extends a predetermined length from the entire peripheral edge of the metallic plate member 6 and continues in an annular shape. It goes without saying that a plurality of plate-shaped engaging pieces extending a predetermined length from a plurality of positions on the edge of the plate-making member 8 may not be connected in an annular shape.

Further, although the holder 15 in the lid opening / closing device 9 of the present embodiment has a suction cup type structure for sucking and holding the lid 4 by the suction force, a structure for sucking and holding the lid 4 by the magnetic force of the electromagnet or a mechanical structure such as a hook. It may be configured to be held by a hanging tool.

Further, in the present embodiment, the lid opening / closing device 9 is of a fixed type attached to the transfer line of the container 1, but the present invention is not limited to this, and a movable type as shown in FIG. 9 may be used. This is a structure in which a base 45 holds a robot arm, a holding device, an air discharge device, and the like as shown in FIG. 9, and by moving the base 45, a lid can be placed at any position. It can be opened and closed.

In this embodiment, the opening / closing device 9 is used to automatically open / close the lid 4, but it is also possible to artificially heat / cool the engaging piece 8 to open / close the lid 4. good.

<Effect of the Invention> As described above, according to the container lid of the present invention,
A metal plate member and a shape recovering property that is attached so as to cover at least an end portion of the metal plate member, extends from the edge to a plate shape for a predetermined length, and engages with the container body in a predetermined temperature range. And an engaging piece made of shape memory resin,
Since the end portion of the metal plate member has a lid structure in which a through hole for locking the shape memory resin covering the upper surface of the end portion and the shape memory resin covering the bottom surface of the end portion is provided, Even if the shape memory resin engaging piece is heated to restore it, the metal plate member peripheral end portion takes away heat and transfers it to the other parts of the metal plate member. The peripheral edge of the plate member and the vicinity of the joint base point of the shape memory resin are less likely to be thermally deformed (difficult to move), and the engagement state between the lid and the container body can be maintained in a good condition, and the lid attachment work can be performed easily. In addition, the lid can be easily opened and closed easily, and the strength can be improved. Further, there is an advantage that the manufacturing cost of the container itself can be reduced.

In particular, in the through hole at the end of the metal plate member in the lid, the shape memory resin forming the engaging piece is integrated from the upper surface and the bottom surface (lower surface) of the metal plate member,
The joining state between the metal plate member and the engaging piece is firmly performed,
Even if the shape memory resin is softened at a high temperature, the joined state between the metal plate member and the engaging piece is maintained, it becomes difficult for them to come off, and there is an advantage that there is no problem in strength.

[Brief description of drawings]

1 is a sectional view showing an embodiment of the lid of the container according to the present invention, FIG. 2 is a partially enlarged perspective view showing the construction of the lid in the above embodiment, and FIG. 3 is a view of the container body in the above embodiment. FIG. 4 is a partially enlarged cross-sectional view showing the relationship with the lid in detail, FIG. 4 is a view showing an example of the lid opening / closing device for the container, and FIG.
(B) is a plan view, (c) is a side view, and FIG. 5 is a view showing a structure of a discharging means and a lid holding means of the lid opening / closing device.
7A is a front view, FIG. 6B is a plan view, FIG. 6C is a perspective view, FIG. 6 is a cross-sectional view showing the configuration of a mounting support base in the lid opening / closing device, and FIGS. c) is a partially enlarged sectional view showing a method of attaching the lid, and FIGS. 8A to 8C are partially enlarged sectional views showing a method of removing the lid, respectively.
FIG. 11 is a perspective view showing another example of the lid opening / closing device, FIG. 10 is a cross-sectional view showing another example of the lid according to the present invention, and FIGS. 11 to 13 are conventional clamp type lid tightening. Figure showing the device,
11 and 12 are sectional views, FIG. 13 is a perspective view, and FIG. 14 is a view showing a conventional clamp band type lid tightening device.
FIG. 14A is a sectional view, and FIGS. 14B and 14C are perspective views, respectively. DESCRIPTION OF SYMBOLS 1 ... Container, 2 ... Opening part, 3 ... Container body, 4 ... Lid, 6 ... Metal plate member, 7 ... Slit, 8 ... Engaging piece (shape memory resin)

Claims (1)

[Claims] 1. A metal plate member, which is mounted so as to cover at least an end portion of the metal plate member, extends from the edge in a plate shape for a predetermined length, and engages with a container body in a predetermined temperature range. An engaging piece made of a shape memory resin having shape recoverability; and an end portion of the metal plate member, wherein the shape memory resin covering the upper surface of the end portion and the end surface of the metal plate member covering the bottom surface of the end portion. A lid for a container, characterized in that a through hole for locking the shape memory resin is provided.