JP2015012951A - Method and apparatus for manufacturing member for double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of a member for double containers capable of reliably pushing an inner cylinder into an outer cylinder and press-fitting it while preventing deformation of the inner cylinder.SOLUTION: The manufacturing method of the member for double containers includes: pushing a metal inner cylinder 7 having one end opened and the other end closed into a metal outer cylinder 6 having both ends opened towards one end side, with the inner cylinder 7 stored in the outer cylinder; and press-fitting one-end-side opening edge part 72 of the inner cylinder 7 in one-end-side opening edge part 62 of the outer cylinder 6. When the inner cylinder 7 is pushed therein, fluid is introduced from the one-end-side opening 72 to the inside of the inner cylinder 7 so as to raise the internal pressure of the inner cylinder 7.

Description

  The present invention relates to a manufacturing method and a manufacturing apparatus for a member for a double container which is a constituent member of a vacuum double container used when, for example, a thermos bottle is manufactured.

  As a container excellent in heat retention, cold insulation, and heat insulation such as a thermos, a metal vacuum double container made of stainless steel or the like is well known.

  For example, as shown in Patent Document 1 below, when manufacturing a double container for a thermos bottle, an outer cylinder whose both ends are open and an inner cylinder whose bottom side is closed are prepared, and the bottom of the outer cylinder is prepared. Insert the inner cylinder from the side opening. Further, in the inserted state (temporary assembly state), the inner cylinder is pushed into the tip side with respect to the outer cylinder, so that the tip portion of the inner cylinder is press-fitted and fixed in the tip portion of the outer cylinder, and the double container member Is made. Further, after the bottom wall (bottom plate) is joined and closed to the bottom side opening of the outer cylinder in the double container member, the vacuum between the two cylinders is sucked and exhausted to create a vacuum double container. ing.

Japanese Patent No. 3007212

  By the way, in recent years, for the purpose of reducing the weight of the thermos and reducing the material cost, the inner cylinder and the outer cylinder of the double container constituting the thermos are being made thinner. For example, a double container for a thermos bottle has been developed in which the body part of the inner cylinder is formed to be extremely thin compared to the mouth part.

  On the other hand, when manufacturing the double container, when the inner cylinder is pushed into the outer cylinder and press-fitted, the load required for press-fitting varies from product to product, but the inner cylinder is pushed into the outer cylinder with a correspondingly high load. There is a need.

  Under these circumstances, as described above, the inner cylinder with an extremely thin wall thickness is low in strength, so that when the inner cylinder is pushed into the outer cylinder, the inner cylinder is unintentionally buckled. There was a risk that the product would be deformed and a product defect occurred.

  This invention is made in view of said subject, The manufacturing method and manufacturing apparatus of the member for double containers which can be reliably pushed in and pressed into an outer cylinder, preventing the deformation | transformation of an inner cylinder. The purpose is to provide.

  In order to solve the above problems, the present invention comprises the following means.

[1] In a state in which a metal inner cylinder whose one end is opened and whose other end is closed is accommodated in a metal outer cylinder whose both ends are opened, the inner cylinder is placed at one end with respect to the outer cylinder. A method for manufacturing a member for a double container, wherein the one end opening edge of the inner cylinder is press-fitted into the one end opening edge of the outer cylinder by pushing,
When the inner cylinder is pushed in, the internal pressure of the inner cylinder is increased by introducing a fluid into the inner cylinder from an opening at one end thereof. Method.

  [2] The method for producing a member for a double container as described in [1] above, wherein air is used as the fluid.

  [3] The method for manufacturing a member for a double container according to the above item 1 or 2, wherein an inner pressure of the inner cylinder when the inner cylinder is pushed in is set to 0.3 Mpa to 0.6 Mpa.

  [4] The double container according to any one of [1] to [3], wherein the introduction of the fluid into the inner cylinder is started immediately before the start of pushing of the inner cylinder or almost simultaneously with the start of pushing. Method for manufacturing a member.

[5] An inner cylinder receiving member that holds one end of a metal inner cylinder that is open at one end and is closed at the other end, and an outer cylinder that holds one end of a metal outer cylinder that is open at both ends A receiving member, and the inner cylinder is held by the inner cylinder receiving member and the outer cylinder receiving member in a state in which the inner cylinder is accommodated in the outer cylinder. A device for manufacturing a member for a double container, wherein the one end opening edge of the inner cylinder is press-fitted into the one end opening edge of the outer cylinder by pushing into the side,
A double body comprising fluid introduction means for introducing a fluid into the inner cylinder held by the inner cylinder receiving member from an opening at one end thereof to increase the internal pressure of the inner cylinder. A device for manufacturing a container member.

[6] The outer cylinder and the inner cylinder are respectively held by the outer cylinder receiving member and the inner cylinder receiving member in a downward state with each one end facing downward,
The manufacturing apparatus of the member for double containers of the preceding clause 5 with which the said inner cylinder of a downward state is pushed below by the said press-fit block.

  According to the method for manufacturing a member for a double container of the invention [1], when the inner cylinder is pushed into the outer cylinder, the internal pressure of the inner cylinder is increased by the introduction of the fluid. The shape can also be maintained. For this reason, the inner cylinder can be reliably press-fitted into the outer cylinder while preventing the inner cylinder from being deformed.

  According to the manufacturing method of the member for a double container of the invention [2], since air is used as a fluid, a gas other than air, a liquid such as water, and a solid such as sand are used. In addition to improved handling, costs can also be reduced.

  According to the method for manufacturing a member for a double container of the invention [3], the above effect can be obtained more reliably.

  According to the method for manufacturing a member for a double container of the invention [4], it is possible to reliably prevent the inner cylinder from being displaced due to the pressure of the fluid, and to reliably prevent a manufacturing defect from occurring.

  According to the apparatus for manufacturing a double container member of the invention [5], the same effect as described above can be obtained.

  According to the double container member manufacturing apparatus of the invention [6], a complicated mechanism such as an outer cylinder receiving member, an inner cylinder receiving member, a sealing means, a fluid introducing means, etc. can be installed in a fixed state on the lower side. Therefore, the structure can be simplified and the cost can be reduced.

FIG. 1 is a front sectional view showing an apparatus for manufacturing a double container member to which a manufacturing method according to an embodiment of the present invention is applied. FIG. 2 is a front sectional view showing a state immediately after the inner cylinder is press-fitted in the double container member manufacturing apparatus of the embodiment. FIG. 3 is a front cross-sectional view showing the vicinity of the press-fitting portion of the inner cylinder in a state immediately before press-fitting in the double container member manufacturing apparatus of the embodiment. FIG. 4 is a front cross-sectional view showing the vicinity of the press-fitting portion of the inner cylinder in a state immediately after press-fitting in the double container member manufacturing apparatus of the embodiment. Drawing 5 is a sectional view showing the member for double containers manufactured by the manufacturing method of an embodiment. FIG. 6 is an exploded perspective view showing the double container member of the embodiment.

  1 to 4 are front sectional views showing a manufacturing apparatus capable of executing a method for manufacturing a member for a double container according to an embodiment of the present invention, and FIGS. 5 and 6 are double containers assembled using the manufacturing apparatus. FIG.

  As shown in these drawings, the double container member 5 manufactured according to the present embodiment is a member constituting a vacuum double container used as, for example, a portable water bottle type thermos bottle.

  In this embodiment, the double container member 5 includes a cylindrical outer tube 6 made of stainless steel or the like having a cylindrical shape, and a metallic inner tube made of stainless steel or the like having a cylindrical shape slightly smaller than the outer tube 6. A cylinder 7 is provided.

  One end side of the outer cylinder 6 is opened by a spout 61 as one end side opening, and the other end side is opened by a bottom side opening 65 as another end side opening. Here, one end side of the outer cylinder 6 is disposed on the upper end side in a normal state, and the other end side is disposed on the lower end side.

  In addition, the bottom side opening 65 of the outer cylinder 6 will be obstruct | occluded by the obstruction board (bottom board) at a post process.

  Further, in the present embodiment, the peripheral portion (one end side opening edge portion) of the spout 61 in the outer cylinder 6 is configured as the tip portion 62, and the portion from the spout 61 to the shoulder portion 63 is configured as the mouth portion 60. ing.

  One end side of the inner cylinder 7 is opened by a spout 71 as an opening on one end side, and the other end side is closed by a bottom plate 75 constituting a closing plate. Here, one end side of the inner cylinder 7 is arranged on the upper end side in a normal state, and the other end side is arranged on the lower end side.

  A peripheral edge portion (upper end opening edge portion) of the spout 71 in the inner cylinder 7 is configured as a mouth end portion 72. The outer diameter of the tip 72 is formed to be equal to or slightly larger than the inner diameter of the tip 62 of the outer cylinder 6.

  A neck portion 73 having a small radial dimension is formed on the upper side of the inner cylinder 7. A portion from the neck portion 73 to the spout 71 in the inner cylinder 7 is configured as a lip portion 70, and two ridge portions 74, 74 protruding in the inner diameter direction are provided on the lip portion 70 in the circumferential direction. It is formed continuously.

  After the inner cylinder 7 having this configuration is inserted into the outer cylinder 6 from the bottom opening 65 of the outer cylinder 6 as will be described in detail later, the inner cylinder 7 is further provided with a lip along the axial direction with respect to the outer cylinder 6. It is pushed into the side (one end side). As a result, as shown in FIG. 5, the tip portion 72 of the inner cylinder 7 is forcibly press-fitted into the tip portion 62 of the outer cylinder 6, and the tip portions 62, 72 are pressed against each other to form a double container member. 5 is produced. Further, in the state of being press-fitted in this way, the positions of the end side edge of the outer cylinder 6 and the end side edge of the inner cylinder 7 coincide with each other in the axial direction.

  In this double container member 5, a closing plate (bottom plate) is joined to the bottom side opening of the outer cylinder 6 and the bottom side is closed to produce a double container. Further, air in the space between the outer cylinder 6 and the inner cylinder 7 in the double container is sucked and exhausted and adjusted to a vacuum state, whereby a vacuum double container for a thermos bottle is produced.

  Next, an inner cylinder press-fitting device that constitutes a manufacturing apparatus for manufacturing the double container member 5 will be described.

  As shown in FIGS. 1 to 4, the inner cylinder press-fitting device basically includes a substrate 1, a base 11, a support base 12, an outer cylinder guide 25, an inner cylinder receiving member 3, and a press-fit block 4. It is provided as a component.

  The substrate 1 has a through hole 1a penetrating in the vertical direction.

  A pedestal 11 is disposed on the substrate 1. The pedestal 11 has a through-hole 11 a penetrating vertically, and is arranged so that the axis of the through-hole 11 a coincides with the axis of the through-hole 1 a of the substrate 1.

  A support base 12 is arranged on the base 11. The support base 12 has a cylindrical shape, and is arranged such that its axis coincides with the axis of the through hole 11 a of the base 11. Therefore, the inner side (inside the cylindrical hole) of the support base 12 communicates with the lower side of the substrate 1 through the through holes 1a and 11a.

  A cylindrical inner cylinder receiving member 3 is disposed inside the support base 12. The inner cylinder receiving member 3 is arranged such that its axis coincides with the axis of the support 12 and can move up and down along the vertical direction (axial direction) with respect to the support 12. Yes.

  The inner cylinder receiving member 3 is formed with an air introduction hole 31 penetrating along the axis. One end of an air introduction pipe 35 is connected to the lower end of the air introduction hole 31 in communication. The air introduction pipe 35 is drawn out below the substrate 1 through the through holes 1a and 11a. A compressed air supply source (not shown) such as a compressor is connected to the other end of the air introduction pipe 35 through a connection pipe 36, and the compressed air supplied from the compressed air supply source is connected to the connection pipe 36. In addition, the air is introduced into the air introduction hole 31 of the inner cylinder receiving member 3 through the air introduction pipe 35.

  Here, in this embodiment, an air supply means as a fluid supply means is configured by the air introduction hole 31, the air introduction pipe 35, the connection pipe 36, and the compressed air supply source (not shown).

  A compression coil spring 30 is disposed between the lower end of the inner cylinder receiving member 3 and the pedestal 11, and the inner cylinder receiving member 3 is urged upward by the urging force of the compression coil spring 30.

  The upper part of the inner cylinder receiving member 3 is configured to be insertable into the spout 61 of the inner cylinder 6 constituting the double container member 5. Further, a concave step portion 32 is continuously formed in the circumferential direction on the outer periphery of the upper end portion of the inner cylinder receiving member 3, and a synthetic rubber O-ring 33 constituting a seal member is installed in the concave step portion 32. Has been.

  When the upper part of the inner cylinder receiving member 3 is inserted into the mouth part 70 of the inner cylinder 7 that is turned upside down, the ridges 74, 74 of the inner cylinder 7 are formed on the outer peripheral surface of the inner cylinder receiving member 3. The inner cylinder 7 is positioned with respect to the inner cylinder receiving member 3 in contact with each other. Further, the O-ring 33 is brought into pressure contact with the neck portion 73 of the inner cylinder 7, whereby the air tightness between the inner peripheral surface of the mouth portion of the inner cylinder 7 and the upper outer peripheral surface of the inner cylinder receiving member 3 is achieved. The inside is sealed. As will be described later, when the inner cylinder 7 is pushed down and pressed in, an upward back pressure is applied to the inner cylinder receiving member 3 by the compression coil spring 30 so that the O-ring 33 is placed in the neck portion of the inner cylinder 7. It comes in close contact with the peripheral surface.

  Here, in this embodiment, the inner cylinder receiving member 3, in particular, the periphery of the concave step portion 32 and the O-ring 33 constitute a sealing means.

  In the inner cylinder press-fitting device, the outer cylinder receiving member 2 is disposed outside the inner cylinder receiving member 3 on the support base 12. An installation hole 21 penetrating vertically is formed in the outer cylinder receiving member 2, and the axial center of the installation hole 21 is arranged to coincide with the axial center of the inner cylinder receiving member 3.

  Furthermore, the inner peripheral surface of the installation hole 21 of the outer cylinder receiving member 2 is formed to follow the outer peripheral surface shape around the mouth portion of the outer cylinder 6 that is turned upside down. The periphery of the mouth part from the mouth part 60 of the outer cylinder 6 to the upper end part of the trunk part through the shoulder part 63 can be accommodated in an adapted state. In this accommodated state (installed state), the inner peripheral surface of the installation hole 21 comes into contact with the periphery of the mouth portion of the outer tube 6 so that the outer tube 6 can be positioned in the horizontal and vertical directions. . Further, in this installed state, the tip end edge of the outer cylinder 6 is supported by contacting the upper surface of the support base 12 in the inner cylinder press-fitting device.

  A cylindrical outer cylinder guide member 25 is disposed on the outer cylinder receiving member 2. The axis of the outer cylinder guide member 25 is disposed so as to coincide with the axis of the installation hole 21 of the outer cylinder receiving member 2. Further, the shape of the inner peripheral surface of the cylindrical hole of the outer cylinder guide member 25 is formed corresponding to the shape of the outer peripheral surface of the body portion of the outer cylinder 6 which is turned upside down. The body part can be accommodated in conformity. In this accommodated state, the inner peripheral surface of the outer cylinder guide member 25 is in contact with the outer peripheral surface of the body part of the outer cylinder 6, whereby the horizontal positioning of the body part of the outer cylinder 6 is achieved.

  The inner cylinder press-fitting device includes a press-fit block 4 disposed above the outer cylinder guide member 25. The press-fitting block 4 has a substantially columnar shape, and is arranged along the vertical direction so that the axis coincides with the axis of the outer cylinder receiving member 2 or the inner cylinder receiving member 3. Furthermore, the lower end surface of the press-fit block 4 is formed corresponding to the bottom shape of the inner cylinder 7 so that it can contact the bottom surface of the inner cylinder 7 in an adapted state.

  The press-fitting block 4 can be driven up and down along the axial direction (vertical direction) by an air cylinder (not shown) as a lifting drive means. As described above, when the press-fit block 4 is lowered while the lower end surface of the press-fit block 4 is in contact with the bottom surface of the inner cylinder 7 set on the inner-tube receiving member 3 in the reverse direction, the press-fit block 4 A downward load is applied to the cylinder 7 so that the inner cylinder 7 is pushed downward.

  The outer diameter of the press-fit block 4 is smaller than the inner diameter of the bottom opening 65 and the body of the outer cylinder 6, and the inner cylinder 7 accommodated in the outer cylinder 6 is pushed into the press-fit block 4. At this time, the press-fitting block 4 does not interfere with the outer cylinder 6.

  Next, a method for producing the double container member 5 by press-fitting the inner cylinder 7 into the outer cylinder 6 using an inner cylinder press-fitting device will be described.

  First, the inner cylinder 7 is inserted from the bottom side opening 65 of the outer cylinder 6, and the inner cylinder 7 is accommodated in the outer cylinder 6 with their axes aligned with each other. In this accommodated state (temporary assembled state), the tip portion 72 of the inner cylinder 7 is not completely fitted into the tip portion 62 of the outer cylinder 6, and both the tip portions 62, 72 are displaced in the axial direction. (Refer to FIG. 3 etc.).

  Subsequently, with the press-fit block 4 raised upward, as shown in FIG. 3, both the tubes 6 and 7 (the double container member 5) in the temporarily assembled state are turned upside down, that is, the mouth side is moved. In the state where it is arranged downward, it is inserted into the outer cylinder guide 25 of the inner cylinder press-fitting device from its upper end opening. Then, the periphery of the mouth portion of the outer cylinder 6 in the double container member 5 in the temporarily assembled state is inserted into the installation hole 21 of the outer cylinder receiving member 2, and the body portion of the outer cylinder 6 is inserted into the cylinder hole of the outer cylinder guide 25. Insert inside. Further, the mouth portion 70 of the inner cylinder 7 is fitted into the outer periphery of the upper portion of the inner cylinder receiving member 3 through the spout 61. In this installed state, as described above, the outer cylinder 6 and the inner cylinder 7 are held in the positioning state by the outer cylinder receiving member 2, the outer cylinder guide 25, and the inner cylinder receiving member 3.

  In this state, the O-ring 33 of the inner cylinder receiving member 3 is in light contact with the inner peripheral surface of the neck portion of the inner cylinder 7, and the sealing performance is not yet sufficiently ensured. .

  In this installed state, the tip edge of the outer cylinder 6 on the tip side is in contact with the upper end surface of the support base 12, but the tip edge of the inner cylinder 6 is not in contact with the upper end surface of the support base 12 and is separated. doing.

  After the double container member 5 in the temporarily assembled state is installed in the inner cylinder press-fitting device in this way, the press-fit block 4 is lowered, and the lower end surface of the press-fit block 4 is placed on the bottom plate 75 of the inner cylinder 7 of the double container member 5. The inner cylinder 7 is pushed downward by the press-fitting block 4.

  At the time of pressing, compressed air is supplied from an air supply source (not shown) immediately before the pressing load applied by the press-fitting block 4 acts on the inner cylinder 7, that is, immediately before the inner cylinder 7 is pushed by the press-fitting block 4. Are introduced into the inner cylinder 7 through the connection pipe 36, the air introduction pipe 35 and the air introduction hole 31 of the inner cylinder receiving member 3.

  In this way, while the compressed air is introduced into the inner cylinder 7, the inner cylinder 7 is pushed in by the press-fit block 4. At the time of pushing, the inner cylinder 7 moves down together with the inner cylinder receiving member 3 while resisting the repulsive force (back pressure) of the compression coil spring 30, so that the repulsive force of the compression coil spring 30 causes the inner cylinder receiving member 3 to The O-ring 33 is brought into close contact with the neck portion 73 of the inner cylinder 7 so that the inside of the inner cylinder 7 is sealed.

  When the inner cylinder 7 is sealed in this way, the internal pressure is increased by the introduced compressed air. Then, the inner cylinder 7 is pushed further downward by the press-fit block 4 in a state where the internal pressure is increased, and the tip 72 of the inner cylinder 7 is press-fitted inside the tip 62 of the outer cylinder 6.

  Here, in the present embodiment, when the inner cylinder 7 is pushed in and press-fitted into the outer cylinder 6, the inside of the inner cylinder 7 is held at a high pressure, so that the inner cylinder 7 is pressed into the outer cylinder 6 during press-fitting. Even when the indentation load applied to the inner cylinder 7 by the block 4 is large, the shape of the inner cylinder 7 can be securely held, and there is no problem that the extremely thin body portion of the inner cylinder 7 is particularly buckled and deformed. The inner cylinder 7 can be reliably press-fitted into the outer cylinder 6.

  Further, when the neck portion 73 of the inner cylinder 7 is brought into close contact with the O-ring 33 of the inner cylinder receiving member 3, a repulsive force (back pressure) by the compression coil spring 30 from the back side (lower surface side) is applied to the inner cylinder receiving member 3. As a result, the neck 73 can be brought into close contact with the O-ring 33 evenly in a well-balanced manner. For this reason, the inner cylinder 7 can be reliably sealed, troubles such as air leakage can be prevented, and the inner cylinder 7 can be more reliably prevented from being deformed during press-fitting.

  In the present embodiment, since the compressed air is introduced into the inner cylinder 7 immediately before the inner cylinder 7 is pushed by the press-fitting block 4, problems such as the inner cylinder 7 being lifted are reliably prevented. be able to.

  That is, if the compressed air is introduced into the inner cylinder 7 in a state where the inner cylinder 7 is not pushed in (not pushed in) by the press-fit block 4, the inner cylinder 7 is lifted from the inner cylinder receiving member 3 by the pressure of the compressed air. The position may be displaced. If the inner cylinder 7 is pushed by the press-fitting block 4 while being displaced, an unexpected and unreasonable stress is applied and the inner cylinder 7 is deformed or the inner cylinder 7 cannot be accurately press-fitted into the outer cylinder 6. There is a risk of production failure. In other words, if the time from the start of the supply of compressed air into the inner cylinder 7 until the inner cylinder 7 is actually pushed by the press-fit block 4 becomes longer, the inner cylinder 7 is pushed by the press-fit block 4. Before, the inner cylinder 7 is lifted by the air pressure and displaced, which may cause a manufacturing defect.

  Therefore, in the present embodiment, compressed air is introduced immediately before the inner cylinder 7 is pushed by the press-fit block 4, so the inner cylinder 7 is suppressed by the press-fit block 4 before the inner cylinder 7 is lifted immediately after the air introduction. be able to. For this reason, problems such as the inner cylinder 7 being inadvertently lifted and displaced due to air pressure do not occur, and the malfunction due to the displacement of the inner cylinder 7 can be reliably prevented, and the press-fitting operation of the inner cylinder 7 can be further performed. This can be done more reliably.

  As described above, according to the inner cylinder press-fitting device as the double container member manufacturing apparatus of the present embodiment, the inner cylinder 7 is fixed to the outer cylinder 6 while reliably preventing the inner cylinder 7 from being buckled. Thus, it is possible to efficiently produce a vacuum double container used as a desired double container member and, consequently, a thermos bottle.

  Further, according to the inner cylinder press-fitting device of the present embodiment, since the double container member 5 in the temporarily assembled state is installed upside down, the support base 12, the outer cylinder receiving member 2, the inner Since complicated and large mechanisms such as the tube receiving member 3 and the air introducing means can be installed in a fixed state on the lower side, the structure can be simplified and the cost can be reduced.

  Here, in the present embodiment, when the inner cylinder 7 is press-fitted, the internal pressure of the inner cylinder 7 by introducing air is preferably set to 0.3 Mpa to 0.6 Mpa. That is, when the internal pressure is too low, the shape of the inner cylinder 7 at the time of press-fitting cannot be reliably maintained, and deformation such as buckling deformation may occur. On the other hand, when the internal pressure is too high, there is a possibility that problems such as the inner cylinder 7 floating and being displaced due to the air pressure may occur.

  In the above embodiment, air is used as the fluid introduced for increasing the internal pressure of the inner cylinder 7, but in the present invention, the fluid introduced into the inner cylinder is not limited to air. For example, as a fluid introduced into the inner cylinder, a gas other than air (air) such as an inert gas such as nitrogen, helium, or argon may be used, or a liquid such as water may be used. Furthermore, you may use the solid comprised by particulate members, such as sand. However, it is preferable to use compressed air (air) in consideration of economic efficiency, handleability, and the like.

  Moreover, in the said embodiment, although the case where the member for double containers for portable water bottles (portable thermos) was manufactured was mentioned as an example, it was not restricted to it, In this invention, it is another double container. Even if it exists, it can manufacture similarly to the above.

  Moreover, in the manufacturing apparatus of the said embodiment, it installs the member for double containers of a temporary assembly state upside down, installs a spout side in the lower side, and pushes an inner cylinder down from the upper side. However, the present invention is not limited to this, and in the present invention, the temporarily assembled double container member may be arranged such that the spout is disposed on the upper side and the inner cylinder is pushed upward from the lower side. The container member may be installed sideways along the horizontal direction, and the inner cylinder may be pushed in the horizontal direction. In other words, in the present invention, the installation direction of the double container member in the inner cylinder press-fitting device may be set in any direction. However, in the present invention, as described above, it is preferable that the temporarily assembled member for a double container is installed upside down.

  Furthermore, in the above-described embodiment, the inner cylinder is pushed into the outer cylinder. However, the present invention is not limited to this, and in the present invention, the outer cylinder may be pushed into the inner cylinder, or the outer cylinder and the inner cylinder. May be pushed into each other. In short, the inner cylinder may be pushed relative to the outer cylinder.

  In the above embodiment, air is introduced into the inner cylinder 7 immediately before the inner cylinder 7 is pushed by the press-fit block 4, but the present invention is not limited to this. In the present invention, the inner cylinder 7 by the press-fit block 4 is used. The air may be introduced into the inner cylinder 7 almost simultaneously with the pressing of.

<Example>
The temporarily assembled outer cylinder 6 and inner cylinder 7 (double container member 5) were set in the same manner as in the above-described inner cylinder press-fitting device.

  The inner cylinder 7 is made of stainless steel (SUS304), the tip 72 has a thickness of 0.3 mm, the thinnest part (body) has a thickness of 0.08 mm, a total length of 166.4 mm, and the length of the thinnest part. The diameter is 103 mm, the outer diameter of the mouth portion 72 is φ53.4 mm, and the outermost diameter of the thinnest portion is φ52 mm.

  Further, a φ125 mm air cylinder was used as a lifting drive means for driving the press-fitting block 4 up and down.

  Then, the press-fitting block 4 is lowered by this cylinder, and the inner cylinder 7 in the temporarily assembled double container member 5 is pushed downward with a pressure of 0.4 MPa (4920 N) by the press-fitting block 4 and is press-fitted into the outer cylinder 6. did. Immediately before the press-fitting, compressed air was supplied into the inner cylinder 7 to increase the internal pressure to 0.2 MPa, and press-fitting was performed in that state.

  After the press-fitting was completed, the press-fitting block 4 was raised and the double container member 5 was taken out.

  When the appearance of the double container member 5 was visually observed, there was no particular abnormality and the inner cylinder 7 was press-fitted into the outer cylinder 6 with certainty.

  Based on the above examples, the following verification (confirmation work) was further performed.

  First, only the inner cylinder 7 was set without setting the outer cylinder 6 in the inner cylinder press-fitting device. In this state, since the inner cylinder 7 is not covered with the outer cylinder 6, the deformation of the inner cylinder 6 can be easily grasped visually.

  After setting only the inner cylinder 7 in this manner, the press-fit block 4 was lowered by the air cylinder, and a pressure of 0.1 MPa was applied to the inner cylinder 7 downward. At substantially the same time, compressed air was introduced into the inner cylinder 7 to increase the internal pressure to 0.4 MPa. No particular abnormality was observed during this increase in internal pressure.

  Thereafter, the pressure (pressure input) to the inner cylinder 7 by the air cylinder was gradually increased to 0.4 MPa.

  In this state, the supply amount of compressed air was gradually decreased to gradually decrease the internal pressure of the inner cylinder 7, and the relationship between buckling deformation of the inner cylinder 7 and the internal pressure of the inner cylinder 7 was verified.

  As a result, until the time when the internal pressure of the inner cylinder 7 gradually decreased and reached 0.16 MPa, no buckling deformation that could be visually confirmed in the inner cylinder 7 was observed.

  However, when the internal pressure of the inner cylinder 7 became lower than 0.16 MPa, it was confirmed that the body portion of the inner cylinder 7 was buckled.

  From the above verification results, it is considered that buckling deformation occurs in the inner cylinder 7 when the inner pressure of the inner cylinder 7 is in the range of 0.1 MPa to less than 0.16 MPa. Is set to about 0.2 MPa, it can withstand 4920 N (0.4 MPa), which is the pressure when the inner cylinder 7 is pushed into the outer cylinder 6. That is, from this example, it became clear that the introduction of air into the inner cylinder 7 is an effective means as a countermeasure against buckling deformation at the time of press-fitting the inner cylinder.

  The manufacturing method of the member for double containers of this invention can be utilized, for example when manufacturing the stainless steel vacuum double container etc. of a thermos bottle.

2: Outer cylinder receiving member 3: Inner cylinder receiving member 31: Air introduction hole (fluid introduction means)
33: O-ring (sealing means)
35: Air introduction pipe (fluid introduction means)
36: Connection pipe (fluid introduction means)
4: Press-fit block 5: Double container member 6: Outer cylindrical body 62: Mouth part (one-end-side opening edge)
7: Inner cylinder 71: Spout (one end side opening)
72: Mouth portion (one end side opening edge)

Claims (6)

By pushing the inner cylinder into one end side with respect to the outer cylinder in a state in which the metal inner cylinder having one end opened and the other end closed is accommodated in the metal outer cylinder opened at both ends. A method for manufacturing a member for a double container, wherein the one end side opening edge of the inner cylinder is press-fitted into the one end side opening edge of the outer cylinder,
When the inner cylinder is pushed in, the internal pressure of the inner cylinder is increased by introducing a fluid into the inner cylinder from an opening at one end thereof. Method.   The method for producing a member for a double container according to claim 1, wherein air is used as the fluid.   The manufacturing method of the member for double containers of Claim 1 or 2 which was made to set the internal pressure of the inner cylinder at the time of pushing in the said inner cylinder to 0.3 Mpa-0.6 Mpa.   The double container member according to any one of claims 1 to 3, wherein the introduction of the fluid into the inner cylinder is started immediately before the start of pushing the inner cylinder or almost simultaneously with the start of pushing. Manufacturing method. An inner cylinder receiving member that holds one end of a metal inner cylinder that is open at one end and is closed at the other end; and an outer cylinder receiving member that holds one end of a metal outer cylinder that is open at both ends The inner cylinder is held in a state of being accommodated in the outer cylinder by the inner cylinder receiving member and the outer cylinder receiving member, and the inner cylinder is pushed into the one end side with respect to the outer cylinder by a press-fitting block. By this, it is the manufacturing apparatus of the member for double containers which was made to press-fit the one end side opening edge part of the said inner cylinder in the one end side opening edge part of the said outer cylinder,
A double body comprising fluid introduction means for introducing a fluid into the inner cylinder held by the inner cylinder receiving member from an opening at one end thereof to increase the internal pressure of the inner cylinder. A device for manufacturing a container member. The outer cylinder and the inner cylinder are respectively held by the outer cylinder receiving member and the inner cylinder receiving member in a downward state in which each one end side is downward,
The apparatus for manufacturing a member for a double container according to claim 5, wherein the inner cylinder in a downward state is pushed downward by the press-fitting block.

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