JP6393232B2 - Storage device - Google Patents

Description

  The present invention relates to an apparatus for storing a storage object such as spent fuel.

  Conventionally, as a device for storing a storage object such as spent fuel, a storage container transported while storing the storage object, a gantry having an upper surface on which the container is placed, There has been known one provided with a lashing device for fixing a container placed on an upper surface to the frame.

  For example, Patent Literature 1 discloses an apparatus that secures a cask on a gantry using a plurality of trunnions provided in a cask corresponding to the container. The storage container has a cylindrical outer peripheral surface, and is introduced along a cask introduction direction which is a specific horizontal direction with respect to the center position of the upper surface of the gantry, and is carried out in the opposite direction. Each trunnion protrudes outward from the outer peripheral surface of the cask to transport the cask at the upper and lower ends of the cask. Among these trunnions, trunnions provided at the lower part of the cask are provided at a plurality of positions arranged at equal intervals in the circumferential direction of the cask, specifically, at four positions arranged at 90 ° intervals. On the other hand, a plurality of lashing devices for lashing the lower trunnions are provided on the gantry.

  Each of the lashing devices includes a trunnion fixing bracket that presses the corresponding trunnion toward the gantry from above, and a pair of fixing bolts that support both ends of the trunnion fixing bracket. Each fixing bolt is detachably attached to the gantry in a posture standing on the gantry, and supports the trunnion fixing bracket so that it can be moved up and down at the support position. Further, among the lashing devices, the lashing devices located on both the left and right sides when viewed from the cask introduction direction are the trunnion fixing bracket and the trunnion fixing bracket at a height position where the trunnion fixing bracket slightly floats with respect to the trunnion It has an opening / closing mechanism that allows one connected (inlet side) fixing bolt to rotate around the other (back side) fixing bolt.

  According to this device, the trunnion fixing brackets of the left and right lashing devices from the central axis of the cask in a state where the lashing device on the inlet side in the cask introduction direction of the lashing device is detached from the gantry. By turning so as to open away, the cask can be carried into and out of the center position on the gantry.

JP2013-160675A

  In the apparatus described in Patent Document 1, it is necessary to open and close a trunnion fixing bracket that is a member that restrains a trunnion that is a protruding portion of the cask from above in order to put in and out the cask. Since one fixing bolt needs to be rotated around the vertical axis, the following inconvenience is involved.

  1) Since the trunnion fixing bracket restrains the cask on the gantry by being pressed against the trunnion of the cask from above, high strength is required. Therefore, the weight and moment of inertia of the trunnion fixing bracket are generally large. It is not preferable from the viewpoint of handling and safety to rotate such a trunnion fixing bracket around the vertical axis.

  2) If the trunnion fixing bracket is largely rotated outward from the position directly above the corresponding trunnion, the proper fixing position of the trunnion becomes unknown. This makes it difficult to position the cask on the gantry.

  The above-described problems are not limited to the cask as described above, and a storage container that has a plurality of protrusions and stores a storage object, a mount on which the storage container is placed, and the protrusions are restrained from above. A storage device including a fixing device that has a restraining member and fixes the storage container on the gantry may be widely generated.

  An object of this invention is to provide the storage apparatus which can solve the said subject.

  A storage device provided by the present invention is a storage container for storing an object to be stored, and faces outward from an outer peripheral surface of the peripheral wall at a plurality of positions aligned in the circumferential direction at a peripheral wall surrounding the storage space and at a lower portion of the peripheral wall. Having a plurality of container projecting portions projecting to the container and a mounting surface for the storage container, and the storage container can be mounted on the mounting surface in a posture in which the peripheral wall of the storage container stands upright A gantry and a plurality of fixing devices for fixing the container on the placement surface by restraining each container protrusion at least on the upper side thereof. The plurality of container protrusions include container protrusions positioned on the left side and the right side as viewed from the container introduction direction in which the container is introduced on a mounting surface of the gantry in a specific horizontal direction, The plurality of fixing devices include a left fixing device and a right fixing device that restrain the left and right container protrusions, respectively. The left-side fixing device and the right-side fixing device respectively include a restraining member disposed so as to straddle the container protruding portion in a direction parallel to the containing container introduction direction above the corresponding container protruding portion, and the container protruding portion. And a first support portion that supports the restraining member so as to be movable up and down at a position on the back side in the accommodating container introduction direction, and has a support column that stands upright and penetrates the restraining member in the vertical direction. A rotation restricting portion for restricting the rotation of the restraining member around the support column, and a second support portion for supporting the restraining member so as to be movable up and down at a position closer to the inlet side in the container introduction direction than the container projecting portion. And pressing the restraining member from above the restraining member against the corresponding container projecting portion among the plurality of container projecting portions of the housing container placed on the placement surface. Previous description Having a mechanism pressing immobilized on a surface. The second support part includes an elevating member that extends in the vertical direction and is held by the restraining member so as to be elevable. The elevating member extends by elevating so that the elevating member connects the gantry and the restraining member in the vertical direction, and supports the restraining member so that the restraining member can be raised and lowered, and the storage container is disposed as described above. The raising and lowering member is retracted in the vertical direction from the height region that is the region occupied by the container protrusion in the vertical direction in a state of being placed on the surface, and the container protrusion is disposed on the lower side or upper side of the lift member. It moves between a retreat position that allows passage in a horizontal direction parallel to the container introduction direction. The gantry includes a support position holding unit that detachably holds the elevating member at the support position.

  According to this apparatus, the container is placed on the placement surface of the gantry and the container protrusion is used without requiring a rotation around the vertical axis of the restraining member pressed against the predetermined container protrusion. Fixing of the storage container and detachment of the storage container from the placement surface can be easily performed.

  Specifically, the elevating members of the second support portions of the left and right side fixing devices are respectively in the retracted position, and the restraining members of the left side and right side fixing devices are respectively above the positions where the container projecting portions are restrained. In the state where the container is levitated to the position, the container container is placed in the above-described manner while the container projecting portion of the container is passed along the container container introduction direction below or above the lifting member in the retracted position. It can be introduced on the surface. Thereafter, in a state where the container is placed on the placement surface, the elevating member is raised or lowered so as to move from the retracted position to the support position, and is held by the support position holding portion of the gantry. The pressing mechanism presses the restraining member against the container protruding portion from above, so that the left side fixing device and the right side fixing device fix the receiving container on the placement surface via the respective container protruding portions. be able to.

  On the contrary, the pressing mechanism releases the pressing of the restraining member, the restraining member floats from the lower container protrusion, and the lifting member of the second support portion is held by the support position holding portion of the gantry. By separating and moving up or down to the retracted position, the container container is reverse to the container container introduction direction from above the placement surface while allowing the container protrusion to pass below or above the lifting member. It can be carried out in the direction.

  When the container is introduced and carried out, the rotation restricting portion restricts the rotation of the restraining member, which generally has a large weight, around the vertical axis, thereby improving work efficiency and safety. By restricting the restraining member from being horizontally displaced from the normal fixing position of the lower container protrusion, the normal fixing position of the container protrusion becomes unclear due to the displacement. To prevent that. In other words, by carrying out the storage container while restricting the rotation of the restraining member around the vertical axis, the restraining member is maintained at a position immediately above or near a regular fixed position of the container projecting portion. The positioning of the storage container when the storage container is carried in can be facilitated. Further, the rotation restriction further ensures that the elevating member is held by the support position holding portion of the gantry when the elevating member moves from the retracted position to the support position.

  The retreat position of the elevating member may be set at a position below the support position, that is, a position inside the gantry, but the retreat position is set at a position above the support position. This means that the container protruding portion occupies the lifting member using the space above the restraining member without complicating the internal structure of the gantry and without detaching the lifting member from the restraining member. It is possible to retreat upward from the area.

  In this case, the support position holding portion of the gantry can be configured by a holding hole that opens upward so that the lower end portion of the elevating member can be inserted and removed. Furthermore, in the case where the lower end portion of the elevating member has a male screw, and the inner peripheral surface of the holding hole has a female screw that can be screwed with the male screw, the elevating member moves up and down carelessly from the support position. Can be surely blocked.

  On the other hand, when the retracted position of the elevating member is above the support position, the second support part detachably holds the elevating member against the gravity acting on the elevating member at the retracted position. It is preferable to further include a retracted position support part. The retracted position support portion includes a fitted portion provided in a portion of the lift member that is located above the restraining member in a state where the lift member is in the retracted position, and Including a fitting portion that prevents the fitting portion from descending by being supported by the elevating member in a state of being fitted to the fitting portion so as to restrict the displacement in the vertical direction, A supported protrusion that is provided in a portion of the lifting member that is located above the restraining member in a state where the lifting member is in the retracted position and protrudes in a horizontal direction from the other portion, and the supported protrusion. And a spacer that prevents the supported protruding portion from descending by being interposed between the holding member and the restraining member.

  The plurality of fixing devices may include a fixing device other than the left side fixing device and the right side fixing device. For example, when the plurality of container protrusions include a container protrusion located on the inlet side in the accommodating container introduction direction, the plurality of fixing devices are positioned on the inlet side in addition to the left side and right side fixing devices. An inlet side fixing device that restrains the container protruding portion from the upper side and fixes the container protruding portion to the placement surface, which may be installed detachably with respect to the gantry. The inlet side fixing device is detached from the gantry so that the storage container passes through the installation position of the inlet side fixing device and is placed on the placement surface on the placement surface along the storage container introduction direction. Allows to be introduced.

  As described above, according to the present invention, a storage container that has a plurality of container protrusions and stores a storage object, a mount on which the storage container is placed, and a restraint that restrains the container protrusion from above. A storage device including a fixing device having a member for fixing the storage container on the gantry, wherein the storage container is carried into the gantry without rotation of the restraining member around a vertical axis; What can be easily carried out and can fix the storage container on the mount is provided.

It is a perspective view which shows the principal part of the storage apparatus which concerns on the 1st Embodiment of this invention. It is a front view of the cask which comprises the said storage apparatus. It is a bottom view of the said cask. It is a cross-sectional front view which shows the state which has the raising / lowering member of a 2nd support part in a retracted position in the left side and right side fixing devices in the storage apparatus shown by FIG. It is a cross-sectional front view which shows the state in which the raising / lowering member of a 2nd support part exists in a support position in the storage apparatus shown by FIG. 1, and a restraint member is located above the trunnion of the said cask. FIG. 7 is a cross-sectional front view showing a state in which the elevating member of the second support portion is in the support position and the restraining member is pressed against the trunnion in the left and right fixing devices in the storage device shown in FIG. 1. It is sectional drawing along the VII-VII line of FIG. It is sectional drawing along the VIII-VIII line of FIG. It is a cross-sectional front view which shows the state which has a 2nd support part in a retracted position in the left side and right side fixing devices in the storage device concerning a 2nd embodiment of the present invention. FIG. 10 is a cross-sectional view taken along line XX in FIG. 9.

  Preferred embodiments of the present invention will be described with reference to the drawings. In addition, in embodiment described below, the apparatus which stores a spent fuel is disclosed, However, The storage object of the storage apparatus which concerns on this invention is not limited to a spent fuel. The present invention can be widely applied to devices for storing various storage objects.

  FIG. 1 shows a main part of a storage device according to the first embodiment of the present invention. The storage device includes a cask 10 that is a storage container for storing spent fuel, a mount 20 having a mounting surface 22 on which the cask 10 can be mounted, and a plurality of fixing devices.

  The cask 10 has a peripheral wall 12, a bottom wall 13, and an upper lid 14 as shown in FIGS. The peripheral wall 12 has a cylindrical shape surrounding the spent fuel storage space, and has a shape extending in the vertical direction in the basic posture of the cask 10, that is, the posture when placed on the placement surface 22. In other words, the cask 10 is placed on the placement surface 22 in a posture in which the central axis of the peripheral wall 12 extends in the vertical direction. The bottom wall 13 and the upper lid 14 are attached to the peripheral wall 12 so as to close the openings surrounded by the lower end and the upper end of the peripheral wall 12, respectively.

  The cask 10 further includes a plurality of trunnions 16. Each trunnion 16 is a container protrusion that protrudes outward in the radial direction from the outer peripheral surface of the peripheral wall 12, and the cask 10 is lifted and transported using the trunnion 16. Specifically, the trunnions 16 are respectively provided at a plurality of positions aligned in the circumferential direction at the upper and lower portions of the peripheral wall 12. In this embodiment, the trunnions 16 are provided at four positions arranged at equal intervals in the circumferential direction, that is, positions arranged at 90 ° intervals in the upper and lower portions, respectively.

  In this embodiment, the gantry 20 has a substantially square plate shape when viewed from above, and is installed on the ground in such a manner that one surface thereof faces upward as the mounting surface 22 described above. The mounting surface 22 has a shape that is sufficiently larger than the outer periphery of the bottom of the cask 10, and the cask 10 is located at a position where the center of the mounting surface 22 matches the central axis of the cask 10 in the basic posture. The normal mounting position is set.

  The plurality of fixing devices fix the cask 10 to the mounting position on the mounting surface 22 by using the trunnion 16 below the cask 10, and each corresponding trunnion 16 is viewed from above. Has the function of restraining. The arrangement of these fixing devices is set based on a predetermined cask introduction direction. The cask introduction direction is a specific horizontal direction, and the gantry 20 is suspended while the cask 10 is suspended in the basic posture (the posture in which the central axis of the peripheral wall 12 extends in the vertical direction) along the cask introduction direction. It is a direction introduced from the outer side to the mounting position of the gantry 20 described above. Specifically, the cask introduction direction according to this embodiment is set to a direction connecting a specific corner 21 of the gantry 20 and the center of the mounting surface 22 as shown by an arrow in FIG. Yes.

  The plurality of fixing devices are such that two of the four trunnions 16 at the bottom of the cask 10 are positioned on the left and right sides of the cask introduction direction, and the remaining two are positioned on the front and rear sides. The cask 10 is arranged on the assumption that the cask 10 is introduced onto the placement surface 22 described above. Specifically, the plurality of fixing devices include a left side fixing device 31, a right side fixing device 32, an inlet side fixing device 33, and a back side fixing device 34, and these fixing devices 31, 32, 33, 34 are the trunnions. 16, the trunnions 16 located on the left side, the right side, the entrance side (front side), and the back side as viewed from the cask introduction direction are respectively restrained.

  Among the fixing devices 31 to 34, the left side fixing device 31 and the right side fixing device 32 respectively support a restraining member 40 as shown in FIGS. 4 to 6 and the restraining member 40 so as to be movable up and down. It has the 1 support part 50 and the 2nd support part 60, a rotation control part, and a pressing mechanism.

  The restraining member 40 is disposed on the upper side of the corresponding trunnion 16, and restrains the trunnion 16 by being pressed against the trunnion 16 by the pressing mechanism toward the placement surface 22 of the gantry 20, that is, the lower side. . Accordingly, the restraining member 40 has a heavy structure so as to have a high strength to counter the reaction force received from the trunnion 16, and is larger than the weight of the first and second support portions 50 and 60. Have a weight (eg 50-100 kg).

  The restraining member 40 is arranged on the upper side of the trunnion 16 so as to straddle the trunnion 16 in a straddling direction orthogonal to the radial direction of the cask 10, that is, in a direction parallel to the cask introduction direction. The restraining member 40 has a first end portion 41 and a second end portion 42 that are both ends in the straddling direction, and the first end portion 41 and the second end portion 42 are the back side in the cask introduction direction as viewed from the trunnion 16. And on the inlet side. A lower surface of the intermediate portion in the straddling direction of the restraining member 40 constitutes a fitting recess 46 that is recessed upward so as to be fitted with the trunnion 16.

  The first support portion 50 includes a support column 52 that restrains the restraining member 20 in the horizontal direction and guides the restraining member 20 in the vertical direction, and a support mechanism 54 that supports the restraining member 20 on the lower side.

  The support column 52 has a substantially cylindrical shape and is erected on the mount 20 so as to extend upward from the mounting surface 22 of the mount 20. Specifically, the support column 52 has a lower end portion 52a and an upper end portion 52b, and these end portions 52a and 52b have outer peripheral surfaces on which external threads are formed. The pedestal 20 is provided with a screw hole 24 that opens upward on the mounting surface 22, and the lower end 52 a is screwed into the screw hole 24, so that the column 52 is upright on the mounting surface 22. It is fixed in the state.

  The first end portion 41 of the restraining member 40 is formed with a column insertion hole 47 that passes through the first end portion 41 in the vertical direction. The upper part of the column 52 is inserted into the column insertion hole 47. Thereby, the support | pillar 52 can guide the up-down direction, restraining the said restraint member 40 in a horizontal direction.

  The support mechanism 54 is interposed between the mounting surface 22 and the lower surface of the restraining member 40 so as to support the restraining member 40 so as to be movable up and down. In this embodiment, the spacer 55 and the compression coil spring are supported. 56. The spacer 55 has a cylindrical shape and is placed on the placement surface 22 so as to surround the lower portion of the support column 52. The compression coil spring 56 is disposed around the support column 52 so as to be interposed between the upper end of the spacer 55 and the lower surface of the restraining member 40, and the restraining member 40 is moved up and down by compressive elastic deformation in the vertical direction. And the urging force of the compression coil spring 56 biases the restraining member 40 upward.

  The support mechanism 54 is not essential in the present invention. For example, the restraining member 40 may be held at a position higher than the trunnion 16 using a positioning member such as a fixing pin.

  The left and right fixing devices 31 and 32 further include a rotation restricting portion that restricts the rotation of the restraining member 40 around the support column 52. As shown in FIG. 7, the rotation restricting portion according to this embodiment includes a key 70 fixed to the column 52 so as to protrude from the outer peripheral surface of the column 52, and a part of the column insertion hole 47. And a key groove 47a having a shape into which the key 53 can be fitted. In addition, the rotation restricting portion is formed on a portion having a deformed cross section (a cross section other than a circle: for example, a square) formed in a part of the support column 52 and the restraining member 40 so as to be fitted to the support column 52. It can also be configured by a combination with a column insertion hole having a cross section corresponding to the irregular cross section. Alternatively, a stopper may be erected on the placement surface 22 and the stopper may abut against the restraining member 40 to restrict the rotation of the restraining member 40.

The second support part 60 includes a lifting shaft 62 and a fitting tool 64. The elevating shaft 62 is an elevating member that can be moved up and down so as to move between the support position shown in FIGS. 5 and 6 and the retracted position shown in FIG. 4, and the fitting tool 64 includes the elevating shaft 62. The elevating shaft 62 that constitutes the retracted position retaining portion that retains the retracted position at the retracted position has a substantially cylindrical shape extending in the vertical direction, and has a lower end portion 62a and an upper end portion 62b in which an external thread is formed on the outer peripheral surface. On the other hand, the second end portion 42 of the restraining member 40 is formed with a lifting shaft insertion hole 48 penetrating through the second end portion 42 in the vertical direction. The elevating shaft insertion hole 48 has a circular cross section that allows the elevating shaft 62 to be inserted into the elevating shaft insertion hole 48 with almost no gap. By this insertion, the elevating shaft 62 penetrates the restraining member 40 in the vertical direction, and is held by the restraining member 40 so as to be able to move up and down in this state.

  The lift shaft 62 extends so as to connect the gantry 20 and the restraining member 40 in the vertical direction at the support position. Specifically, a screw hole 26 that is a holding hole is formed at a position corresponding to the lift shaft 62 in the gantry 20, and the lower end portion of the lift shaft 62 is screwed into the screw hole 26, thereby the lift shaft 62. Is held in the support position. At this support position, the lifting shaft 62 stands upright so as to extend upward from the upper surface of the gantry 20 and penetrates the restraining member 40 in the vertical direction to restrain the movement of the restraining member 40 in the horizontal direction. And allow relative elevation.

  The holding hole for holding the elevating shaft 62 at the support position is not limited to the screw hole 26, and the inner peripheral surface of the gantry 20 surrounding the holding hole may be a simple hole without a female screw. However, the screwing of the screw hole 26 in which the internal thread is formed on the inner peripheral surface and the lower end 62a of the lifting shaft 62 reliably suppresses the vertical movement of the lifting shaft 62 with respect to the gantry 20. The support of the restraining member 40 by the lift shaft 62 can be further stabilized.

  The retracted position is a position above the support position, and as shown in FIG. 4, the lower end portion 62 a of the elevating shaft 62 is detached upward from the screw hole 26, and the mounting surface described above 22 is a position where the elevating shaft 62 is retracted upward from the height region Ah until the lower end 62a is positioned above the height region Ah of the left and right trunnions 2a of the cask 2 placed on the upper side.

  The fitting 64 is mounted on the restraining member 40 while fitting with a specific portion 62d located above the upper surface of the restraining member 40 in a state where the lifting shaft 62 is in the retracted position. The lift shaft 62 is held at the retracted position against the gravity acting on it.

  Specifically, a female screw further extended from the lower end portion 62a is formed on the outer peripheral surface of the specific portion 62d, whereby the portion 62d constitutes a fitted portion.

  On the other hand, the fitting 64 has a fitting member 66 divided into a pair of half-split members 66a and 66b, a hinge 67, and a fastener 68 as shown in FIG. The fitting member 66 has an inner peripheral surface 66d formed with a female screw that can be fitted to the male screw of the specific portion 62d, and the vertical direction between the two by fitting the specific portion 62d and the inner peripheral surface 66d. The relative displacement of is regulated. The hinge 67 connects one ends of the pair of half members 66a and 66b so as to be rotatable. That is, the half members 66a and 66b are connected to each other so as to be opened and closed. The fastener 68 fastens the halved members 66a and 66b by mutually fastening projecting portions 66c formed so as to project in the radial direction on the opposite side of the hinge 67 of the halved members 66a and 66b. Keep closed.

  The fact that the fitting member 66 is divided into the half members 66a and 66b and can be opened and closed is that both the half members from the outside in the radial direction with respect to the specific portion 62d of the lifting shaft 62 in the retracted position. 66a and 66b are approached so that the inner peripheral surface 66d is fitted to the outer peripheral surface of the specific portion 62d, and the closed state can be held by the fastener 68 in the fitted state. Thus, the fitting member 66 fitted to the specific portion 62d is placed on the restraining member 40, whereby the lifting shaft 62 can be held at the retracted position.

  The pressing mechanism opposes the restraining member 40 supported on the upper side of the trunnion 16 by the support mechanism 54 of the first support portion 50 as shown in FIG. The cask 10 is fixed on the mounting surface 22 by pressing against the trunnion 16. The pressing mechanism according to this embodiment includes upper ends 52b and 62b of the support shaft 52 and the lifting shaft 62, and female screws that can be screwed with male screws formed on the outer peripheral surfaces of the upper ends 52b and 62b. A pair of nuts 72. The pair of nuts 72 are rotationally operated so as to be displaced in the tightening direction (that is, in the downward direction) while being screwed to the support shaft 52 and the upper end portions 52b and 62b of the elevating shaft 62 at the support position. As a result, the first and second end portions 41 and 42 of the restraining member 40 are pressed down against the elastic force of the compression coil spring 56 to press-fit the fitting recess 46 of the restraining member 40 to the upper surface of the trunnion 16. Let

In addition, operated portions 52 c and 62 c are provided at the uppermost ends of the support column 52 and the elevating shaft 62, respectively. The operated portions 52c and 62c receive a rotation operation using a tool for screwing the lower end portion 52a of the support column 52 and the lower end portion 62a of the elevating shaft 62 into the screw holes 24 and 26 of the gantry 20, respectively. The side fixing device 33 and the back side fixing device 34 include the restraining member 40 and the first support portion 50 equivalent to the restraining member 40 and the first support portion 50 of the left and right side fixing devices 31 and 32, Instead of the second support part 60 of the right side fixing devices 31 and 32, a second support part 80 consisting only of the support column 82 is provided. As with the column 52 of the first support 50, the column 82 is screwed with a lower end portion that is detachably screwed into the screw hole 26 provided in the gantry 20, and a nut 72 that constitutes a pressing mechanism. The upper end of the restraint member 40 and vertically penetrates the second end 42 of the restraining member 40 to guide the second end 42 in the up-down direction while restraining in the horizontal direction.

  Therefore, in the entrance side and back side fixing devices 33 and 34, the lower end 52a of the column 52 and the lower end of the column 82 equivalent thereto are attached to and detached from the screw holes 24 and 26 of the gantry 20, The whole entrance side and back side fixing devices 33 and 34 can be attached to and detached from the gantry 20. Among these, the attachment and detachment of the inlet side fixing device 33 from the gantry 20 is carried out so that the restraining member 40 is mounted along the cask introduction direction so as to pass through the arrangement position of the inlet side fixing device 33 as described later. It is possible to be introduced onto the mounting surface 22 and, conversely, to be carried out from the mounting surface 22. On the other hand, the back side fixing device 34 does not necessarily need to be attached to and detached from the gantry 20.

  According to the storage device described above, unlike the conventional device, the container can be placed and fixed on the placement surface of the gantry without the heavy weight of the restraining member 40 being rotated around the vertical axis. The container can be easily detached from the mounting surface. Specifically, it is as follows.

  First, 1) the inlet side fixing device 33 is removed from the gantry 20, and 2) the elevating shaft 62 of the second support portion 60 of the left side fixing device 31 and the right side fixing device 32 is in the retracted position as shown in FIG. 3) The support mechanism 54 of the first support portion 50 of each of the fixing devices 31, 32, 34 excluding the inlet side fixing device 33 restricts the restricting member 40 to the normal restricting position (the restricting member 40 restricts the trunnion 16). The trunnions 16 pass above the lower end 62a of the elevating shaft 62 of the left and right fixing devices 31 and 32 along the cask introduction direction while being held at a position above the position to be). However, the cask 10 can be introduced to the installation position on the mounting surface 22 of the gantry 20. The conveying means for introducing the cask 10 is not particularly limited. The cask 10 may be suspended by a crane or may be carried on a carriage. In any case, the cask 10 can be transported in a horizontal direction at a position slightly higher than the upper surface of the gantry 20, which makes it possible to ensure high safety.

  In the state where the cask 10 is placed on the placement surface 22 as described above, the fitting member 66 of the fitting tool 64 is opened, and the specific portion 62d of the lifting shaft 62 is held by the fitting. When the lift shaft 62 is released and the lower end 62a is screwed into the screw hole 26 to hold the lift shaft 62 at the support position shown in FIG. 5, the lift shaft 62 and the first support are supported. A state in which the restraining member 40 is restrained in the horizontal direction is formed by both the column 52 of the portion 50. In this state, the nuts 72 screwed on the upper end portion 52b of the support column 52 and the upper end portion 62b of the elevating shaft 62 are rotated and lowered gradually, and the elevating member 40 is compressed by the compression coil spring of the support mechanism 54. The left side fixing device 31 and the right side fixing device 32 are pressed down against the elastic force of 56 and the fitting recess 46 of the elevating member 40 is pressed against the upper surface of the trunnion 16 as shown in FIG. , Respectively, the trunnions 16 corresponding to these can be restrained on the gantry 20 side.

  On the other hand, in parallel with or before and after the above operation, the inlet side fixing device 33 is mounted on the gantry 20, and the same tightening operation of the nut 72 as the above is performed on the inlet side fixing device 33 and the back side fixing device 34. The cask 10 can be fixed onto the placement surface 22 via the four trunnions 16 by performing (pressing down) the respective restraining members 40 against the corresponding trunnions 16.

  Further, the cask 10 can be carried out from the placement surface 22 in the reverse order. Specifically, 1) the nut 72 is loosened to allow the restraining member 40 to float by the elastic force of the compression coil spring 56, 2) the inlet side fixing device 33 is removed from the gantry 20, and 3) The lower end portion 62a of the lifting shaft 62 of the second support portion 60 is detached from the screw hole 26 to raise the lifting shaft 62 to the retracted position, and the fitting tool 64 is fitted to the specific portion 62d so that the lifting shaft 62 is fitted. Is held in the retracted position so that the trunnion 16 passes under the lower end portion 62a of the elevating shaft 62 from above the placement surface 22 as in the introduction. The cask 10 can be carried out in the direction opposite to the cask introduction direction.

  The rotation restricting portion including the key 70 and the key groove 47a restricts the rotation of the restraining member 40 around the support column 52 while the elevating shaft 62 is removed from the screw hole 26 during the introduction and unloading of the cask 10. To do. This contributes to improvement in work efficiency and safety. Further, the restriction of the rotation of the restraining member 40 makes it possible to prevent the proper fixing position of the trunnion 16 from becoming unclear due to the displacement. In other words, even when the cask 10 is carried out, the restraining member 40 can be positioned immediately above the restraining position of the trunnion 16 without moving in the horizontal direction. This facilitates positioning of the cask 10 when the next cask 10 is carried in. Further, the rotation restriction reliably enables the lifting shaft 62 to be screwed into the screw hole 26 of the gantry 20 when the lifting shaft 62 is lowered to the support position.

  The present invention is not limited to the embodiment described above. The present invention includes the following embodiments, for example.

(1) Retraction position holding part The retraction position holding part for holding the elevating shaft 62 at the retraction position is not limited to the fitting 64. For example, as the second embodiment, a spacer 69 as shown in FIGS. 9 and 10 may be used.

  The spacer 69 includes a supported protruding portion that protrudes outward in the radial direction from other portions at a position above the restraining member 40 in the lifting shaft 62 at the retracted position, and the restraining member 40. By interposing between the two, the lowering of the lifting shaft 62 from the retracted position is prevented. In the example shown in the drawing, a nut 72 attached to the upper end portion 62b of the elevating shaft 62 is used as the supported protruding portion, and the spacer 69 is interposed between the lower surface of the nut 72 and the upper surface of the restraining member 40. Is installed.

  As shown in FIG. 10, the spacer 69 is divided into a pair of halved members 69 a and 69 b like the fitting member 66 of the fitting tool 64, and one end thereof is rotated by a hinge 67. The projections 69 c are connected to each other so that the projections 69 c can be opened and closed, and these projections 69 c can be fastened by the fasteners 68. When the spacer 69 is long, the hinge 67 and the protruding portion 69c are preferably provided at a plurality of positions aligned in the longitudinal direction of the spacer 69 as shown in FIG. Alternatively, the spacer 69 may be divided into a plurality of members in the longitudinal direction.

  Alternatively, the retracted position holding portion may be a fixed pin that is inserted into a hole formed in an appropriate portion of the lifting shaft 62. However, the fitting tool 64 and the spacer 69 hold the elevating shaft 62 in the retracted position without lowering the strength of the elevating shaft 62 due to processing of holes or the like in the elevating shaft 62 that is an elevating member. There are advantages that can be made.

  The retracted position holding unit may be omitted as appropriate.

(2) Retraction position The retraction position of the elevating member may be set below the support position of the elevating member. That is, the retracted position may be set to a position where the lifting member is allowed to move downward from the restraining member and allow the container protruding portion to pass above the upper end of the lifting member. For example, when the vertical distance from the upper surface of the gantry to the restraining member is short (that is, the position of the restraining member is low) and the gantry is thicker than this, at least a part of the elevating member is The retracted position may be set at a position buried inside. In this case, the support position holding part may be any member that holds the lifting member that has floated from the retracted position inside the gantry to the support position at the support position. For example, the support position holding portion is a fitting tool similar to the fitting tool 62 and is fitted to a specific part above the upper surface of the gantry of the elevating member, and the relative vertical direction thereof is fitted. It can be constituted by what is placed on the upper surface of the gantry while regulating the displacement.

  However, when the retracted position is a position above the support position as in the first and second embodiments, the lifting member can be moved from the restraining member without complicating the internal structure of the gantry. There is an advantage that the elevating member can be retracted from the support position using the space above the restraining member without being separated.

(3) About fixing devices other than the left and right side fixing devices In the present invention, the necessity of fixing devices other than the left side and right side fixing devices can be appropriately determined according to the size and weight of the storage container. For example, when the storage container is relatively light and small, the storage container may be fixed only by the left and right side fixing devices.

10 Casks (container)
12 Perimeter wall 16 Trunnion (container protrusion)
20 Mounting base 22 Mounting surface 26 Screw hole (support position holding part)
31, 35 Left side fixing device 32, 36 Right side fixing device 33 Entrance side fixing device 34 Back side fixing device 40 Restraining member 47 Post insertion hole 47a Key groove (constitutes a rotation restricting portion)
48 Elevating shaft insertion hole 50 1st support part 52 support 52a lower end part of support 52b upper end part of support (forms pressing mechanism)
60 Second support portion 62 Elevating shaft 62a Lower end portion of the elevating shaft 62b Upper end portion of the elevating shaft (composing a pressing mechanism)
64 Fitting tool 69 Spacer 70 Key (configures the rotation restricting part)
72 Nut (composes a pressing mechanism)

Claims (8)

A storage device,
A storage container for storing a storage object, and a plurality of container protrusions protruding outward from the outer peripheral surface of the peripheral wall at a plurality of positions aligned in the circumferential direction at a peripheral wall surrounding the storage space and at a lower portion of the peripheral wall What you have,
A mounting base having a mounting surface for the storage container, and the storage container can be mounted on the mounting surface in a posture in which a peripheral wall of the storage container stands;
A plurality of fixing devices for fixing the container on the placement surface by restraining each container protrusion at least on the upper side thereof,
The plurality of container protrusions include container protrusions that are located on the left side and the right side as viewed from the container introduction direction in which the container is introduced on the mounting surface of the gantry in a specific horizontal direction,
The plurality of fixing devices include a left side fixing device and a right side fixing device that restrain the left and right container protrusions, respectively.
The left-side fixing device and the right-side fixing device respectively include a restraining member disposed so as to straddle the container protruding portion in a direction parallel to the containing container introduction direction above the corresponding container protruding portion, and the container protruding portion. And a first support portion that supports the restraining member so as to be movable up and down at a position on the back side in the accommodating container introduction direction, and has a support column that stands upright and penetrates the restraining member in the vertical direction. A rotation restricting portion for restricting the rotation of the restraining member around the support column, and a second support portion for supporting the restraining member so as to be movable up and down at a position closer to the inlet side in the container introduction direction than the container projecting portion. And pressing the restraining member from above the restraining member against the corresponding container projecting portion among the plurality of container projecting portions of the housing container placed on the placement surface. Previous description A mechanism pressing immobilized on the surface, have,
The second support portion includes an elevating member that extends in the vertical direction and is held by the restraining member so as to be movable up and down. The elevating member moves the gantry and the restraining member in the up and down direction by raising and lowering the second elevating member. A support position that extends so as to be connected to the support member so that the restraining member can be moved up and down, and a height that is an area occupied by the container protruding portion in the vertical direction in a state where the storage container is placed on the placement surface. A retraction position that allows the elevating member to retreat vertically from the region and allows the container protrusion to pass through the lower side or upper side of the elevating member in a horizontal direction parallel to the container introduction direction. Move and
The said base has a support position holding part which hold | maintains the said raising / lowering member in the said support position so that attachment or detachment is possible.   The storage device according to claim 1, wherein a retracted position of the elevating member is a position above the support position.   3. The storage device according to claim 2, wherein the support position holding portion of the gantry includes a holding hole that opens upward so that a lower end portion of the elevating member can be inserted and removed.   4. The storage device according to claim 3, wherein a lower end portion of the elevating member has a male screw, and the holding hole has a female screw whose inner peripheral surface of the frame surrounding the holding hole can be screwed with the male screw. Is a storage device.   5. The storage device according to claim 2, wherein the second support portion detachably holds the lifting member against the gravity acting on the lifting member in the retracted position. A storage device further comprising a support.   The storage device according to claim 5, wherein the retracting position support portion is provided in a portion of the lifting member that is located above the restraining member in a state where the lifting member is in the retracted position. A fitting that prevents the fitting portion from descending by being supported by the elevating member in a state fitted to the fitting portion so as to regulate the vertical displacement of the fitting portion and the fitting portion. And a storage device.   6. The storage device according to claim 5, wherein the retracting position support portion is provided on a portion of the lifting member that is located above the restraining member in a state where the lifting member is in the retracted position. A storage device comprising: a supported protrusion that protrudes in a horizontal direction from the portion; and a spacer that is interposed between the supported protrusion and the restraining member to prevent the supported protrusion from descending. The storage device according to any one of claims 1 to 7, wherein the plurality of container protrusions further include a container protrusion positioned on an inlet side in the storage container introduction direction, and the plurality of fixing devices are In addition to the left and right side fixing devices, an inlet side fixing device that restrains the container protruding portion located on the inlet side from the upper side and fixes it to the mounting surface, and is detachably installed on the mount Including storage devices.

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