JP5243574B2 - Square sealed container - Google Patents

Description

  The present invention relates to a rectangular sealed container in which, for example, low-level radioactive waste or the like is stored in a sealed space formed therein.

  FIGS. 13 to 17 are views referred to for explaining the conventional square sealed container 2. As shown in FIG. 13, a conventional rectangular sealed container 2 has a box-shaped square container main body 4 having an opening 4a formed at the upper end, and the square container main body 4 mounted on the opening. A lid member 6 that closes 4a and a fastening member 8 that sandwiches the peripheral edge 6a of the lid member 6 and the opening 4a of the rectangular container body 4 and fastens them together are provided.

  As shown in FIG. 15, the rectangular container body 4 in the conventional rectangular sealed container 2 of FIG. 13 has four openings 4a and corners between adjacent edges 4e and 4e. It was comprised by the bending part 4d of the bending radius R formed in this.

  As shown in FIGS. 15 and 17, the upper end portion of the opening 4 a of the rectangular container body 4 is bent outward and downward to form a core metal winding portion 4 c in which the core metal 5 is wound inside, The upper end portion of the opening 4a was reinforced by the cored bar winding portion 4c.

  As shown in FIGS. 15 and 17, the upper and lower cross-sections of the outer side surface 4b of the rectangular container body 4 are rounded so that the outer side of the outer side surface 4b goes around in the horizontal direction at the upper part near the opening 4a. A letter-shaped opening reinforcing member 12 (container reinforcing member) was wound and fixed integrally to the rectangular container body 4 by welding.

  In addition, as shown in FIG. 17, the lid member 6 in the conventional square sealed container 2 has an opening of the square container body 4 through a sealing material 7 provided inside a recess 6b on the back side of the peripheral edge 6a. It was to be placed on the core metal winding part 4c at the upper end of the part 4a.

  And as shown in FIG. 14, the fastening member 8 in the conventional square-shaped airtight container 2 is formed in L shape, and a total of four arrangement | positioning members are arrange | positioned on the outer side of the four corner parts of the cover member 6 and the opening part 4a, respectively. It had been. That is, as shown in FIG. 16A, when the fastening member 8 is viewed from above, the fastening member 8 is formed in an L shape having a corner portion 8b in which two straight portions intersect each other at a substantially right angle.

  A fastening fitting 10 is integrally provided by welding or the like at the tip of the two L-shaped straight portions of the fastening member 8 on the opposite side to the intersecting corner portion 8b. 16 (a) and 16 (b), the fastening fitting 10 is formed by bending a belt-like plate member, and one end thereof is in contact with the upper portion of the fastening member 8 (see FIG. 17). ), And the surrounding area was fixed integrally by welding or the like.

  And as shown in FIG. 17, the other end part of the fastener 10 was bent by circular shape, and the through-hole 10a was formed inside the bent part.

  As shown in FIGS. 16B and 17, the fastening member 8 is formed in a hook shape (wedge shape) whose upper and lower cross sections perpendicular to the length direction branch from the concave portion 8 a toward the two upper and lower tip portions. It was.

  Then, each of the two upper and lower end portions of the hook-shaped upper and lower cross-sections of the fastening member 8 sandwich the peripheral edge portion 6a of the lid member 6 and the core metal winding portion 4c at the upper end portion of the opening 4a of the rectangular container body 4 In this state, a pair of fasteners 10 provided at the ends of two fastening members 8 that are adjacent to each other in the length direction are fastened to each other by fastening a nut 16 to a bolt 14 so that the ends of the fasteners 10 are long. It was supposed to be tightened to approach the direction.

  As a result, as shown in FIG. 17, the distal end portion of the fastening member 8 that is branched into two hook-shaped sections is the peripheral edge portion 6 a of the lid member 6 and the opening portion 4 a of the rectangular container body 4. By approaching the core metal winding part 4c at the upper end from the outside in the horizontal direction, the peripheral edge part 6a of the lid member 6 and the core metal winding part 4c at the upper end part of the opening 4a of the rectangular container body 4 are mutually connected. A sealed space is formed inside the rectangular container body 4 by applying pressure and pressing so as to approach the vertical direction (see, for example, Patent Documents 1 and 2).

JP 2000-085765 A JP 2005-315803 A

  However, in the conventional rectangular sealed container 2, for example, for the purpose of increasing the volume of the rectangular container body 4 as much as possible and increasing the volume that can be accommodated therein, the folded portion 4d of the rectangular container body 4 is folded. When the bending radius R is made smaller, the length of the side portion 4e of the rectangular container body 4 is increased accordingly. Therefore, the fastening strength by the fastening member 8 is insufficient, and the lid member 6 There existed a problem that there exists a possibility that it may leave | separate from the opening part 4a of the square container main body 4. FIG.

  In addition, when the external dimensions of the rectangular container body 4 in the conventional rectangular sealed container 2 are made larger than those in the conventional case, the length of the side part 4e of the rectangular container body 4 is increased, so that the same problem as described above is obtained. Since a problem occurs, the outer dimension of the rectangular container body 4 cannot be increased, and thus the outer dimension of the rectangular sealed container 2 cannot be increased.

  Therefore, in view of the above problems, the present invention prevents the peripheral edge of the lid member and the upper end of the opening of the rectangular container body from separating even when the length of the side part of the rectangular container body is increased. It is an object of the present invention to provide a rectangular sealed container that can maintain a sealed state inside the container.

In order to solve the above problems, a rectangular sealed container according to the present invention is:
A box-shaped rectangular container body having an opening at the upper end;
A lid member disposed on the rectangular container body to close the opening;
The cross-sectional shape orthogonal to its own length is formed in a bowl shape so as to sandwich the peripheral edge of the lid member and the upper end of the opening of the rectangular container body, and its own length is the lid A fastening member disposed along the side of the member;
A bent portion is formed at an upper end portion of the device, and the bent portion includes a holding member that engages with the fastening member, and the fastening member is directed in a horizontal direction and a lower direction toward the square container body. suppressed and a restrained mechanism to give,
A lower end portion of the holding member opposite to the upper end portion where the bent portion is formed is locked to a container reinforcing member provided in the rectangular container body, and the holding mechanism is a screw fastening means. The center portion of the restraining member is restrained toward the square container main body side and the lower side by a tightening force .

Further, the rectangular sealed container according to the present invention is:
The holding member is arranged to be inclined so as to be farther away from the rectangular container body as it goes toward the lower end side.

According to such a rectangular sealed container of the present invention,
A box-shaped rectangular container body having an opening at the upper end;
A lid member disposed on the rectangular container body to close the opening;
The cross-sectional shape orthogonal to its own length is formed in a bowl shape so as to sandwich the peripheral edge of the lid member and the upper end of the opening of the rectangular container body, and its own length is the lid A fastening member disposed along the side of the member;
A bent portion is formed at an upper end portion of the device, and the bent portion includes a holding member that engages with the fastening member, and the fastening member is directed in a horizontal direction and a lower direction toward the square container body. By having a holding mechanism to hold down,
Even when the length of the side portion of the rectangular container body is increased, the inside of the container can be kept sealed by preventing the peripheral edge of the lid member from separating from the upper end of the opening of the rectangular container body. it can.

It is a side view of the square airtight container 20 concerning one embodiment of the present invention. It is a top view of the square airtight container 20 shown in FIG. It is the elements on larger scale which expand and show the circle part A in the square airtight container 20 shown in FIG. It is a side view of the square container main body 22 which comprises a part of square closed container 20 shown in FIG. It is a top view of the square container main body 22 shown in FIG. It is a bottom view of the square container main body 22 shown in FIG. It is the elements on larger scale which expand and show the circular part B in the square container main body 22 shown in FIG. FIG. 8A is a front view of the latching member 30 shown in FIG. 7, and FIG. 8B is a side view thereof. It is a figure which shows the cover member 24 which comprises a part of square-shaped airtight container 20 shown in FIG. 1, Comprising: Fig.9 (a) is the top view, FIG.9 (b) is the front view. It is a figure which shows the fastening member 26 which comprises a part of square-shaped airtight container 20 shown in FIG. 1, Comprising: Fig.10 (a) is the top view, FIG.10 (b) is the front view. FIG. 11A is a front view of FIG. 11A and FIG. 11B is a side view of the holding member 28 constituting a part of the rectangular sealed container 20 shown in FIG. 1. The fastening member 26 and the restraining member 28 of the rectangular sealed container 20 shown in FIG. 1 are used to fasten the peripheral edge portion 24a of the lid member 24 and the core metal winding portion 22c at the upper end of the opening 22a of the rectangular container body 22 It is a partial expanded sectional view which expands and shows. It is a side view of the conventional square airtight container 2. FIG. It is a top view of the square airtight container 2 shown in FIG. It is a top view of the square container main body 4 which comprises a part of square closed container 2 shown in FIG. It is a figure which shows the fastening member 8 of the square airtight container 2 shown in FIG. 13, Comprising: Fig.16 (a) is the top view, FIG.16 (b) is the side view. With the fastening member 8 of the rectangular sealed container 2 shown in FIG. 13, the state in which the peripheral edge portion 6 a of the lid member 6 and the core metal winding portion 4 c at the upper end of the opening portion 4 a of the rectangular container body 4 are fastened is enlarged. It is a partial expanded sectional view shown.

Hereinafter, the form for implementing the square airtight container concerning the present invention is explained concretely based on a drawing.
FIGS. 1-12 is a figure referred in order to demonstrate the square airtight container 20 which concerns on one embodiment of this invention.

  As shown in FIGS. 1 to 3, a rectangular sealed container 20 according to an embodiment of the present invention includes a box-shaped rectangular container body 22 having an opening 22 a formed at the upper end, and the rectangular container. A lid member 24 is disposed on the opening 22a of the main body 22 and closes the opening 22a.

  And furthermore, by pressing down the core part winding part 22c (see FIG. 12) as described later of the peripheral part 24a of the lid member 24 and the opening part 22a of the square container body 22 in the vertical direction, A fastening member 26 and a holding member 28 that form a sealed space are provided inside the rectangular container body 22.

  As shown in FIGS. 1 and 2, the fastening member 26 has a length in the horizontal direction, and its shape in the upper and lower cross-sections is formed into a bowl shape (see FIG. 3). Are arranged along the four sides of each of the peripheral edge 24a and the upper end of the opening 22a of the rectangular container body 22.

  And as shown in FIG. 3, the front-end | tip part branched from the recessed part 26a into the upper and lower two of the bowl shape of the upper-lower cross section of the fastening member 26 is the peripheral part 24a of the cover member 24, and the opening part of the square container main body 22 The bent portion 28 b of the holding member 28 is engaged with the fastening member 26 in a state where the core metal winding portion 22 c of 22 a is sandwiched.

  The fastening member 26 is restrained by tightening the restraining member 28 by fastening the bolt 32 and the nut 34 with the head 32a hooked to the retaining member 30 fixed to the side plate portion 36 of the square container body 22 and the nut 34. When pressed by the bent portion 28b of the member 28, the peripheral edge portion 24a of the lid member 24 and the cored bar winding portion 22c of the opening portion 22a of the rectangular container body 22 are held down in the vertical direction so that the lid member 24 is square. The opening 22a of the mold container body 22 can be closed.

  The rectangular container body 22 of the rectangular sealed container 20 shown in FIG. 4 is made of metal using mild steel or the like, and is not provided with the lid member 24, the fastening member 26, the restraining member 28, or the like. From the square cylindrical state, the bottom plate portion 38 is integrally joined to the lower end portion of the side plate portion 36 by welding or the like, whereby the lower opening of the side plate portion 36 is closed and the upper opening is opened. Is formed.

  As shown in FIG. 5, the opening 22a of the rectangular container body 22 has four corners formed at substantially right angles when viewed from above, so that the opening 22a is formed in a substantially square shape. It has become.

  And as shown in FIG. 4, the leg part 40 is provided under the baseplate part 38 of the square container main body 22, and the lid member 24, the fastening member 26, and the opening part 22a of the square container main body 22 are provided. After necessary members such as the restraining member 28 are attached, the leg portions 40 of the other rectangular container body 22 can be stacked on the fastening member 26.

  As shown in FIG. 6, the leg portions 40 of the rectangular container body 22 have girders 46 and 48 arranged vertically and horizontally, and reinforcing ribs 50 are arranged between the girders 46. As shown, they are integrally joined to the lower surface of the bottom plate portion 38 by welding or the like.

  For this reason, as shown in FIG. 6, the bottom plate portion 38 of the rectangular container body 22 is reinforced, and the rectangular sealed container 20 can be easily formed by inserting the fork of the forklift between the beam members 46 shown in FIG. It is configured to be able to carry on.

  As shown in FIG. 12, the side plate portion 36 of the rectangular container body 22 is configured with a core metal winding portion 22c in which the upper end portion of the opening 22a is bent outward and downward and the core metal 5 is wound inside. Yes. This core metal winding part 22c reinforces the upper end part of the opening part 22a of the square container main body 22 (side plate part 36).

  Then, as shown in FIG. 4, the side plate portion 36 of the rectangular container body 22 has a rounded outer periphery in the horizontal cross section of the side plate portion 36 at the upper portion on the opening 22 a side opened at the upper end portion thereof. An opening reinforcing member 42 (container reinforcing member) having an L-shaped upper and lower cross section is wound around and fixed integrally.

  Of the two L-shaped side portions of the upper and lower cross-sections of the opening portion reinforcing member 42, as shown in FIG. 5, the front end surface of the side portion protruding in the substantially vertical direction (horizontal direction) from the side plate portion 36. A plurality of cutout portions 42a cut out in a substantially rectangular shape are formed at intervals in the length direction (vertical and horizontal directions in FIG. 5).

  Further, as shown in FIG. 5, the side plate portion 36 of the rectangular container body 22 is provided with the latching member 30 at a position facing the notch portions 42 a of the opening reinforcing member 42 in the horizontal direction. It has become. In FIG. 5, the latch member 30 has a side portion 30d (see FIG. 8B) provided on the side plate portion 36, the tip of which is hidden by the core winding portion 22c, and the side portion 30e (FIG. 8B). Only the part of ()) is visible.

  As shown in FIG. 8 (b), the hooking member 30 of the rectangular container body 22 has a U-shaped cross-sectional shape whose both end portions are bent substantially perpendicular to the central portion. Is formed.

  Then, as shown in FIG. 7, the side portions 30d on both ends of the hooking member 30 that are bent are arranged so as to be aligned in the vertical position, and the front end surface 30a of each side portion 30d is outside the side plate portion 36. While being welded to the side surface, the lower surface of the side portion 30d on the lower end side of the retaining member 30 is welded to the upper surface of the opening reinforcing member 42, so that the retaining member 30 is integrated with the rectangular container body 22. It is fixed.

  As shown in FIG. 8 (a), the latch member 30 has a central side portion 30e that connects between the side portions 30d on both sides of the U-shaped bent shape in the vertical cross-sectional shape. A U-shaped cutout 30b that is recessed from the right edge toward the center is formed.

  As shown in FIG. 12, a male screw part 32b of a bolt 32 is loosely inserted into the notch part 30b.

  For this reason, the latching member 30 inserts the male screw part 32b of the bolt 32 into the notch 30b, and the back surface (right side in the figure) of the head 32a of the bolt 32 into the inner side surface 30c of the latching member 30. Are arranged so as to face each other, and the head portion 32a of the bolt 32 can be locked to the side portion 30e of the hooking member 30.

  Further, as shown in FIG. 4, the rectangular container body 22 has a bottom surface of a side portion of the opening reinforcing member 42 attached to the side plate portion 36 that protrudes from the side plate portion 36 in a substantially vertical direction (horizontal direction). The U-shaped vertical reinforcing members 44 extending over the upper surfaces of the beam members 46 and 48 of the leg portions 40 of the rectangular container body 22 are 2 on the outer side surfaces of the four side portions in the horizontal section of the side plate portion 36. They are arranged one by one, and are fixed to the side plate portion 36 integrally at each contact portion by welding or the like.

  On the other hand, the lid member 24 of the rectangular sealed container 20 shown in FIGS. 1 and 2 is made of metal using mild steel or the like, and its planar shape is that of the rectangular container body 22 as shown in FIG. It is formed in a substantially square shape similar to the opening 22a, and round R portions are formed at the four corners.

  Then, as shown in FIGS. 1 and 3, the lid member 24 is placed on the cored bar winding portion 22 c at the upper end portion of the side plate portion 36 of the rectangular container body 22, and the rectangular sealed container 20. The opening 22a at the upper end of the is closed.

  As shown in FIG. 9A, on the upper surface of the lid member 24, two handles 56, which are inclined so as to increase in height from the center side toward the outside, are welded to positions facing away from each other. Etc. are integrally attached.

  The handle 56 of the lid member 24 places the leg portion 40 of the rectangular container body 22 of another rectangular sealed container 20 on the fastening member 26 mounted on the outside of the lid member 24, so that the rectangular sealed container 20. When they are stacked in the vertical direction, they are formed in a position, width dimension and height dimension so as not to contact the leg portion 40 of the rectangular container body 22.

  As shown in FIGS. 9A and 9B, the lid member 24 is provided with a rib 52 having a height in the vertical direction from its lower surface so as to follow the outer shape of the peripheral edge 24a. And the rib 54 which has the height comparable as the rib 52 is provided in the lower surface of the cover member 24 inside the external shape outline of the rib 52 in the plane direction of the cover member 24 at the grid | lattice form.

  As shown in FIG. 12, the ribs 52 and 54 of the lid member 24 are formed from the inner peripheral surface of the opening 22a of the rectangular container body 22 when the lid member 24 closes the opening 22a of the rectangular container body 22. It is designed to enter inside.

  Further, as shown in FIG. 12, the peripheral edge 24a of the lid member 24 is formed by bending the front end of the cross section in the vertical direction downward in the figure, and the peripheral edge 24a of the lid member 24 and the rib 52 are formed. A groove portion 24b that is recessed upward in the figure is formed in a region surrounded by the outer contour of FIG. 2, and an elastic sealing material 7 is attached in the groove portion 24b.

  On the other hand, the fastening member 26 of the square sealed container 20 is made of metal using mild steel or the like, and as shown in FIGS. It is formed in the shape of a ridge that branches toward. And as shown to Fig.10 (a), the fastening member 26 seen from the top is formed in length substantially linearly.

  As shown in FIGS. 3 and 12, the fastening member 26 of the rectangular sealed container 20 has a recess 26 a formed between the peripheral edge 24 a of the lid member 24 and the core metal winding part 22 c at the upper end of the rectangular container body 22. It arrange | positions so that it may oppose to a horizontal direction, and it is mounted | worn with them from the outer side, and the length direction of the fastening member 26 is arrange | positioned along each of the four sides of the cover member 24, as shown in FIG. It has become.

  Further, the holding member 28 of the rectangular sealed container 20 is made of metal using mild steel or the like, and is formed in a shape in which an oval is elongated as shown in FIG.

  Further, as shown in FIG. 11B, the holding member 28 has a bent portion 28b formed at the upper end thereof, and a portion below the bent portion 28b in the drawing is a simple flat plate portion 28a. A through hole 28c through which the male screw portion 32b of the bolt 32 shown in FIG. 12 is loosely inserted is formed at a substantially central portion of the flat plate portion 28a.

  As shown in FIG. 12, the bent portion 28 b of the holding member 28 has a holding surface 28 d on the side facing the fastening member 26, and an inclined surface with a lower right side in the figure, outside the upper half of the recessed portion 26 a of the fastening member 26. It is arranged so that it touches along.

  The flat plate portion 28a of the holding member 28 is inserted into the through hole 28c with the male screw portion 32b of the bolt 32, and the lower end portion of the facing surface 28e of the holding member 28 facing the latching member 30 is the opening portion reinforcing member 42. The holding member 28 is inclined slightly as a whole so that the bent portion 28b leans against the fastening member 26 on the left side in the drawing by engaging with the notch 42a.

  That is, as shown in FIG. 12, the holding member 28 has a flat plate portion 28a with respect to the vertical direction so as to gradually move away from the outer surface of the side plate portion 36 of the rectangular container body 22 as it goes downward. It is arranged so as to be inclined by a middle c °.

  Then, by inserting the nut 34 through the through hole 28c of the holding member 28 of the bolt 32 and screwing the nut 34 to the tip of the male screw portion 32b protruding outward from the outer surface 28f of the flat plate portion 28a of the holding member 28. The restraining member 28 is restrained in an oblique direction between the left direction and the downward direction in FIG.

  The holding member 28, the latching member 30, the bolt 32, the nut 34, and the cutout portion 42a of the opening portion reinforcing member 42 constitute a holding mechanism as a whole.

  By such a restraining mechanism, the fastening member 26 of the square sealed container 20 is applied with the tightening force F by the screw fastening by the restraining surface 28d of the bent portion 28b of the restraining member 28 that is in contact with the inclined surface. It will be in the state.

  For this reason, the fastening member 26 causes the peripheral edge portion 24a of the lid member 24 and the core metal winding portion 22c at the upper end portion of the opening portion 22a to move upward and downward with each other by the component force of the tightening force F acting in the left direction in FIG. By exerting a force to bring them closer together, both are firmly held down and fastened together.

  At this time, as shown in FIG. 12, the sealing material 7 attached to the groove portion 24 b of the lid member 24 is pressure-bonded to the core metal winding portion 22 c at the upper end portion of the opening portion 22 a of the square container body 22. The lid member 24 closes the opening 22 a of the rectangular container body 22 so that a sealed space is formed inside the rectangular container body 22.

  Further, the fastening member 26 and the lid member 24 are restrained in the same direction for each restraining mechanism by the component force acting in the downward direction in FIG. 12 of the tightening force F, so that the length of the side portion of the rectangular container body 22 is increased. Even if the size is increased, the sealing member 7 of the lid member 24 is restrained by the cored bar winding portion 22c at the upper end of the rectangular container body 22 for each restraining mechanism. The restraining strength against the force in the direction in which the upper end portion of the opening 22a of the mold container body 22 is separated can be increased.

  According to such a rectangular sealed container 20 according to an embodiment of the present invention, even if the length of the side portion of the rectangular container body 22 is increased, the peripheral edge portion 24a of the lid member 24 and the rectangular container. Since it can prevent that the upper end part of the opening part 22a of the main body 22 leaves | separates, the sealed state inside the square airtight container 20 can be maintained.

  Further, according to the rectangular sealed container 20 according to the embodiment of the present invention, the outer dimension of the rectangular container body 22 can be increased, so that the outer dimension of the rectangular sealed container 20 is also increased. Can be big.

  In the rectangular sealed container 20 according to the embodiment of the present invention, the holding member 28 is disposed to be inclined by c ° in the drawing with respect to the vertical direction, and the c ° is set to a small angle of several degrees. Although shown, the c ° may be set to a large angle of about 30 °.

  Further, in the rectangular sealed container 20 according to the embodiment of the present invention, as shown in FIG. 2, the rectangular container main body 22 and the lid member 24 are formed in a substantially square outer shape in a horizontal plane. However, the outer shape in the horizontal direction may be formed in a substantially rectangular shape.

  Various changes can be made in response to a change in the design of the outer shape of the rectangular sealed container 20. For example, the number of the retaining members 30, the cutout portions 42 a of the opening reinforcing member 42, and the number of holding members 28 can be increased or decreased. Alternatively, the pressing member 28 may be directly engaged with the side portion of the outer shape of the opening reinforcing member 42 without providing the notched portion in the opening reinforcing member 42.

2 Square-shaped airtight container 4 Square-shaped container body 4a Opening 4b Outer side surface 4c Core metal winding part 4d Bending part 4e Side part 5 Core metal 6 Lid member 6a Peripheral part 6b Recessed part 7 Sealing material 8 Fastening member 8a Recessed part 8b Corner Part 10 Fastening bracket 10a Through-hole 12 Opening part reinforcing member 14 Bolt 16 Nut 20 Square sealed container 22 Square container body 22a Opening part 22c Metal core winding part 24 Lid member 24a Peripheral part 24b Groove part 26 Fastening member 26a Concave part 28 Suppression Member 28a Flat plate portion 28b Bending portion 28c Through hole 28d Holding surface 28e Opposing surface 28f Outer side surface 30 Holding member 30a Tip surface 30b Notch portion 30c Inner side surface 30d, 30e Side portion 32 Bolt 32a Head portion 32b Male screw portion 34 Nut 36 Side plate Part 38 bottom plate part 40 leg part 42 opening part reinforcement member 42a notch part 44 vertical reinforcement member 46, 8 digit material 50 reinforcing ribs 52, 54 rib 56 handle

Claims (2)

A box-shaped rectangular container body having an opening at the upper end;
A lid member disposed on the rectangular container body to close the opening;
The cross-sectional shape orthogonal to its own length is formed in a bowl shape so as to sandwich the peripheral edge of the lid member and the upper end of the opening of the rectangular container body, and its own length is the lid A fastening member disposed along the side of the member;
A bent portion is formed at an upper end portion of the device, and the bent portion includes a holding member that engages with the fastening member, and the fastening member is directed in a horizontal direction and a lower direction toward the square container body. suppressed and a restrained mechanism to give,
A lower end portion of the holding member opposite to the upper end portion where the bent portion is formed is locked to a container reinforcing member provided in the rectangular container body, and the holding mechanism is a screw fastening means. A square sealed container characterized in that the central portion of the restraining member is restrained toward the square container body side and the lower side by a clamping force . 2. The square sealed container according to claim 1 , wherein the holding member is disposed to be inclined so as to be farther away from the square container main body toward the lower end side.

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