JPH075136B2 - 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 constructed as shown in FIGS. Further, the clamp band type is configured as shown in FIG.

In the clamp type shown in FIGS. 9 to 11,
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 a packing which is pre-bonded to the inner surface of the engagement recess 50 as shown in FIG. 9 or a cover which is put on the engagement projection 48 as shown in FIG.

Further, as the clamp 52, the hook 52a is engaged with the outer surface of the engaging recess 50 as shown in FIG. 9, or the ring 52b is provided with the outer surface of the engaging recess 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. 12, 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 concave portion 50 and the engaging convex portion 48 into the groove 55 so as to sandwich the engaging concave portion 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. .

Further, in the conventional hermetically sealed structure, packing is indispensable for both the clamp type and the clamp band type, the number of parts increases, and it takes time to manage the parts.

In addition, it is necessary to clean the packing 51 and the mounting portion of the packing 51, and there is a disadvantage in that it takes a lot of time for cleaning. Further, as shown in FIG. 9, in the case where the packing 51 is pre-bonded to the inner surface of the engaging recess 50,
It is difficult to clean the gap formed at the boundary between the packing 51 and the engaging recess 50. In particular, in pharmaceutical manufacturing, it is necessary to wash containers in lot units for the same product type as well as when switching product types, and the cost required for this is enormous.

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.

In view of the conventional problems as described above, the present invention utilizes a shape memory resin having properties different from metals such as plastic properties and rubber-like elasticity to improve the engagement state of the lid with the container body. An object of the present invention is to provide a lid for a container which can easily open and close the lid and which does not require a packing having a problem.

<Means for Solving the Problems> Therefore, the lid of the container of the present invention is mounted while covering at least the peripheral portion of the metal plate member, the entire bottom surface and side surfaces of the metal plate member, and the upper surface. A shape memory resin having an engaging piece portion extending from an edge of the metal plate member by a predetermined length and having a shape recovering property such that the engaging piece portion engages with the container body in a predetermined temperature range. And a molded body.

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 engagement piece portion of the shape memory resin molded body 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. It may be provided with a notch so as to be easily deformed, or it may be formed into a plate shape extending from a plurality of positions on the edge of the plate member for a predetermined length and not connected in an annular shape. If there is such an engaging member, it may have any shape that can engage 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, for attaching the lid to the container body, for example, the engaging piece portion is inclined to have a substantially frustoconical peripheral surface shape or a substantially cylindrical peripheral surface shape so that the lid is easily attached to the opening portion 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 engaging piece portion 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 to the engaging piece to heat the engaging piece. As a result, the shape memory resin molded body is restored to the stored original shape, and the engaging piece portion engages with the container body.

At that time, even if the shape-memory resin molded body is heated to restore the shape, the peripheral edge portion of the metal plate member absorbs the heat and transfers it to other parts, so that the metal plate member is the base point for restoring the shape. When the joining base point of the peripheral end portion and the engaging piece portion of the shape memory resin (in the vicinity of the peripheral end portion of the plate member) is hard to be thermally deformed, and the engaging piece portion of the shape memory resin is restored to the stored original shape, Since it returns to the predetermined position, it is possible to maintain good joining with the container body.

Therefore, the heating means for the engaging piece portion of the shape memory resin does not need to strictly heat only the engaging piece portion,
Various means can be adopted.

Further, since the portion that heats the shape memory resin molded body is not the entire lid but a partial portion, the shape restoration time is short.

Next, for example, cold air is blown onto the engaging piece to cool the engaging piece. As a result, the engaging piece portion of the shape memory resin molded body is fixed to the stored original shape.

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

Also, since the shape memory resin itself plays the role of packing,
Since packing that is difficult to clean is unnecessary, the number of parts can be reduced and parts management can be simplified.

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 is in a state where it can be freely deformed by an external force while memorizing the original shape, and therefore, by moving the lid from the opening of the container body, the engaging piece and the container body are separated from each other. The engaged state is released, and the removal of the lid is completed.

Since the removed lid stands by for the next attachment, as described above, the engagement piece is fixed at room temperature in a shape such as a substantially conical peripheral surface shape that makes it easy to attach the lid to the opening of the container body. To

Since the lid has the shape memory resin molded body covering at least the bottom surface of the metal plate member, packing is not required on the bottom surface of the lid that comes into contact with the stored items, and cleaning is extremely easy.

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.

In FIG. 1, a container 1 is provided with a container body 3 having an opening 2 for filling and taking out articles, and a lid 4 according to the present invention for opening and closing the opening 2.

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 formed of a metal such as stainless steel and a shape memory resin molded body 7.

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 attached to the metal plate member 6 so as to cover the entire surface thereof, that is, the bottom surface, the side surface, and the top surface, and extends from the peripheral edge of the metal plate member 6 in a plate shape for a predetermined length and is continuous in an annular shape. The above-mentioned shape memory resin molded body 7 including the portion 8 is provided. The shape memory resin molded body 7 is provided with a shape recoverability such that the engaging piece portion 8 fits into the engaging convex portion 5 of the container body 3 in a tight fit state in a predetermined temperature range. Further, the engagement piece portion 8 is provided with a notch at the lower end portion of the engagement piece portion 8 as necessary so that the engagement piece portion 8 can be easily deformed and fitted into the engagement convex portion 5 of the container body 3.

A recess 4a is formed in the center of the upper surface of the lid 4 configured as described above.
Is formed so that the main body 3 of another container 1 can be placed and supported thereon.

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. 2, 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 stores the original shape of the air or the engagement piece portion 8 in a specific temperature range for deforming to the fastening fixed side in accordance with the memory effect of the engagement piece portion 8 of the shape memory resin molded body 7. And a discharge means for discharging the air in a specific temperature range toward the engaging piece portion 8, a cover holding means for holding the cover 4 (the metal plate member 6), and the discharge. The moving means and the lid holding means move integrally.

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

In FIG. 3, a discharge ring forming a part of the discharge means
A large number of fluid discharge holes 16 (see FIGS.
(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 a gas suction pipe 23 is communicatively connected to four locations on the inner peripheral 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. 2, a pair of columns 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 arranged between the middle portions of the horizontal rail members 27 in the longitudinal direction so as to be bridged 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
The other end of 1a is rotatably connected to one end,
An arm whose other end is rotatably connected to the ends of two connecting parts formed on the side surface of the moving body 29 so as to project therefrom.
30b 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, by expanding and contracting each of the two robot arms 30 and 31 by the cylinder device 34, the connecting member 18 can be moved up and down, and the discharge ring 14 and the cage 15 can be moved up and down.

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. 4, the mounting support 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 engaging piece portion 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. 4, 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 portion 8 comes into contact with the outer peripheral surface of the annular convex portion 43b. As a result, the engagement piece portion 8 is fixed to a shape matching 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. 4, the engagement piece portion 8 of the upper lid 4 comes into contact with the outer peripheral surface of the engagement piece portion 8 of the lower lid 4, and the engagement piece portion of the upper lid 4 is engaged. The portion 8 is fixed in a shape that matches the outer peripheral surface of the engaging piece portion 8 of the lower lid 4 at room temperature.

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 4b 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 pipe 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 4 of the lid 4
The pressure is reduced between the upper surface and the upper surface, 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. 5 (a), the bottom portion of the recess 4 a 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 portion 8 is in a state of protruding obliquely downward from the upper outer peripheral surface position 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-reduced state between the inside of the cage 15 and the upper surface of the recess 4a of the lid 4 is released, the suction holding of the lid 4 is released, and hot air from an 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 hot air is blown onto the engaging piece portion 8 to heat the engaging piece portion 8. The warm air temperature is, for example, about 60 to 80 ° C.

Therefore, the shape memory resin forming the engaging piece portion 8 is deformed as shown in FIG. 5 (b) and finally in FIG. 5 (c).
As shown in FIG.
Fits into the engaging projection 5 of the container body 3 in a tight fit.

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 to the engaging piece portion 8 to cool the engaging piece portion 8.

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

It should be noted that the suction holding of the lid 4 may be released after the engaging piece portion 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. It contacts the upper surface of the recess 4a. 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 piece portion 8 (FIG. 6 (a)).
reference).

Since the engaging piece portion 8 is heated, it can be freely deformed by an external force while memorizing the original shape.
Next, the cylinder device 34 is driven to the contracted state, and the holder 15
6 is moved upward, the engaging piece 8 is deformed from a curved state to a linearly extended state from the state shown in FIG. 6 (b) to the state shown in FIG. 6 (c). Meanwhile, the lid 4 moves upward. As a result, the fitting state between the engaging piece portion 8 and the engaging convex portion 5 is released. If this happens, the cage
15 is moved further upward, the moving body 29 is driven, and the cage
15 is stopped at a position above the mounting support table 43. Then, when the holder 15 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 placed on the mounting support 43, so that the engaging piece portion 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. 2 (a), and is conveyed to the destination by the automatic conveyance vehicle 44. It

According to the lid 4 having the configuration of the above-described embodiment, the engagement piece that is mounted so as to cover the entire surface of the metal plate member 6 and that extends from the peripheral edge of the metal plate member 6 in a plate shape for a predetermined length and is continuous in an annular shape. A shape memory resin molded body 7 including a portion 8 is provided, and the shape of the shape memory resin molded body 7 is such that the engaging piece portion 8 is fitted to the engaging convex portion 5 on the container body 3 side in a predetermined temperature range. As a result of imparting shape recoverability, it has the following advantages.

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.

Since the shape memory resin itself serves as a packing, a packing that is difficult to clean is not required, and the number of parts can be reduced and the parts management can be simplified.

Further, since the shape memory resin molded body 7 is provided so as to cover the metal plate member 6, there is no packing on the bottom surface of the lid that comes into contact with the stored items, and cleaning is extremely easy.

This is particularly effective in pharmaceutical manufacturing, because it is necessary to wash the container in lot units even when the product type is changed, and moreover, it is more effective and the cost can be reduced.

Further, even if the shape memory resin molded body 7 is heated to restore the shape, the peripheral end portion of the metal plate member 6 takes away heat and transfers it to the other part of the metal plate member 6, so that the shape is restored. The joint base point of the metal plate member 6 and the shape memory resin molded body 7 (near the peripheral end of the metal plate member 6) which is the base point is hard to be thermally deformed (difficult to move), and the lid 4 and the container body 3 are The engaged state of can be kept excellent.

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

Further, since the lid 4 is provided with the metal plate member 6 as a core material, so to speak, the lid 4 is stronger than a lid made of a shape memory resin, so that the container 1 can be stacked and moved or stored. There is no problem even if you do.

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 this embodiment, the shape-memory resin molded body 7 covers the entire metal plate member 6, but the upper surface of the metal-made plate member 6 may have a configuration in which only the peripheral portion is covered with the shape memory resin molded body. good.

Further, in this 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 engaging piece portion 8 of the shape memory resin molded body is formed in a circular truncated cone peripheral surface shape or a cylindrical peripheral surface shape which extends a predetermined length from the entire peripheral edge of the metallic plate member 6 and is continuous in an annular shape. It goes without saying that a plurality of plate-like engaging piece portions extending a predetermined length from a plurality of positions on the edge of the metal plate 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 in which it is not provided in the transfer line of the container 1, but the present invention is not limited to this, and a movable type as shown in FIG. 7 may be used. This is a structure in which a base 45 holds a robot arm, a holding device, a wind discharge device, and the like as shown in FIG. 3, and by moving the base 45, a lid can be placed at any position. It can be opened and closed.

In this embodiment, the lid 4 is automatically opened / closed by using the opening / closing device 9, but the lid 4 is opened / closed by artificially heating / cooling the engaging piece portion 8. Is also good.

<Effect of the Invention> As described above, according to the container lid of the present invention,
A shape including a metal plate member and an engaging piece part that is attached so as to cover at least the peripheral portions of the entire bottom surface and side surfaces of the metal plate member and the upper surface, and that extends a predetermined length from the edge of the metal plate member. A memory resin molded body is provided, and in order to restore the shape as a result of imparting shape recoverability such that the engaging piece engages with the container body in a predetermined temperature range to the shape memory resin molded body. Even if the engaging piece portion of the shape memory resin molded body is heated, the peripheral edge portion of the metal plate member absorbs the heat and transfers it to the other portion of the metal plate member, which is the base point for restoring the shape. The peripheral edge of the member and the vicinity of the joint base point of the shape memory resin molded body are less likely to be thermally deformed (difficult to move), and the engagement state between the lid and the container main body can be maintained in a good state, and the lid attachment work is easily performed. It is possible to reduce the number of parts and the parts Hakare the simplification, thereby also improving the cleaning property. Further, the opening and closing of the lid can be easily automated, and the strength can be improved. Further, there is an advantage that the manufacturing cost of the container itself can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a container lid according to the present invention, FIG. 2 is a view showing an example of the container lid opening / closing device of the same, (a) is a front view, and (b) is a plan view. FIG. 3 (c) is a side view, FIG. 3 is a view showing the structure of the discharging means and the lid holding means of the lid opening / closing device, in which (a) is a front view and (b) is a plan view.
(C) is a perspective view, FIG. 4 is a sectional view showing a configuration of a mounting support base in the lid opening / closing device, and FIGS. 5 (a) to (c) are partially enlarged sectional views showing a method of attaching the lid. , Sixth
(A) to (c) are partially enlarged sectional views showing a method for removing the lid, FIG. 7 is a perspective view showing another example of the lid opening / closing device, and FIG. 8 is another embodiment of the lid according to the present invention. Cross-sectional views showing an example, FIGS. 9 to 11 are views showing a conventional clamp-type lid tightening device, and FIGS. 9 and 10 are cross-sectional views and 11
FIG. 12 is a perspective view, FIG. 12 is a view showing a conventional clamp band type lid tightening device, FIG. 12 (a) is a sectional view, and FIGS. 12 (b) and (c) are perspective views, respectively. . DESCRIPTION OF SYMBOLS 1 ... Container, 2 ... Opening part, 3 ... Container body, 4 ... Lid, 6 ... Metal plate member, 7 ... Shape memory resin molded body, 8 ... Engaging piece part

Claims (1)

[Claims] 1. A metal plate member, and a member which is mounted so as to cover at least the peripheral portions of the entire bottom surface and side surfaces and the upper surface of the metal plate member, and extends a predetermined length from the edge of the metal plate member. A lid for a container, comprising: a shape memory resin molded body, which is provided with a joint piece portion and is provided with a shape recovery property such that the engaging piece portion engages with the container body in a predetermined temperature range. .