JP2008127203A - Cargo support device of cargo storage rack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance aseismatic performance by adopting base isolation structure for a cargo support device of a cargo storage rack with a long pair of right and left cargo receiving members 3 horizontally installed in the cargo taking-in and -out direction inside the right-left partition wall frames 2 of a cargo storage section 1. <P>SOLUTION: A support member 7 continuously arranged from both right and left partition wall frames is arranged on the lower side of the cargo receiving members 3. A support means 9 slidably supporting the cargo receiving members 3 in a specific range in at least its length direction, and an energizing means 11 energizing and holding the cargo receiving members 3 to and in a fixed position in a slidable area, are arranged between these support member 7 and cargo receiving members 3. This energizing means 11 comprises at least one energizing unit 12A and 12B composed of a lower side spring receiving member 13 projected upward from the support member 7, an upper side spring receiving member 22 projected downward from the cargo receiving members 3 and a coil spring 26 having both upper and lower ends fitted to both upper and lower spring receiving members 23 and 25. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a load support device for a load storage rack in which a pair of left and right load receiving members that are long in the front-rear depth direction of the load storage section are horizontally installed inside the left and right partition walls of the load storage section.

In this type of load storage rack, when the rack swings in the front / rear depth direction (unloading / unloading direction) of the load storage section, the load being stored can be placed on the aisle side of the rack (the loading / unloading provided along the rack). There is an accident that the load receiving member slides and falls to the side of the traveling crane. As one means for preventing such an accident, a pair of left and right load receiving members included in each load storage section is considered to have a seismic isolation structure. For example, as described in Patent Document 1, the seismic isolation structure in the load support device of this type of load storage rack is configured such that each load receiving member is attached to a support member provided continuously from both left and right partition walls of the load storage section. As a biasing means for supporting the load receiving member slidably in its length direction (front and rear depth direction of the load storage section) and biasing and holding the load receiving member at a fixed position in the slidable region, the length of the load receiving member is A coil spring parallel to the vertical direction was provided. That is, a coil spring that presses and urges the load receiving member backward (opposite to the side having the passage) with respect to the support member, and a coil spring that presses and urges the load receiving member forward (side with the passage) with respect to the support member. Are arranged in series, and the load receiving member is held at an intermediate fixed position in the front-rear depth direction by the pressing biasing force of both coil springs.
Japanese Patent No. 3729316 (Japanese Patent Laid-Open No. 2000-226111)

  In the biasing means in the conventional configuration described in Patent Document 1, two coil springs and two outer spring seats that receive the outer end portions of both coil springs by a support member as components constituting one biasing unit. And an inner spring receiving seat that receives the inner ends of both coil springs on the load receiving member side, and a long bolt and nut that supports two coil springs in series in a horizontal direction. In addition, since the urging unit is exposed to the lateral sides of the load receiving member and the support member, not only the space occupied in the plan view of the entire load support device is increased, but also due to dust adhesion and contact with other objects. Inconvenience is also considered.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a load support device for a load storage rack capable of solving the conventional problems as described above, and the load support device according to claim 1 is an implementation described later. When a reference numeral of the form is attached, a pair of left and right load receiving members 3 that are long in the front-rear depth direction (X direction) of the load storage section 1 are installed horizontally inside the left and right partition walls 2 of the load storage section 1. A support member 7 connected from the left and right partition wall frames 2 is disposed below the load receiving member 3, and the load receiving member 3 is placed horizontally between the support member 7 and the load receiving member 3. A load storage rack provided with support means 9 for slidably supporting within a fixed range in the two-dimensional direction and urging means 11 for urging and holding the load receiving member 3 at a fixed position in the slidable region. It is a support device, and the urging means 11 is the load receiving member 3. The urging units 12A and 12B are provided in at least two locations in the length direction, and each of the urging units 12A and 12B is arranged from one member of the support member 7 and the load receiving member 3 to the other member side. A central spring receiving member 13 projecting toward the center, an outer spring receiving member 22 projecting from the other member toward the one member side so as to surround the central spring receiving member 13, and the center A spiral coil spring 15 is interposed between the spring receiving member 13 and the outer spring receiving member 22.

  When the load supporting device for a load storage rack according to the present invention is implemented, the center spring receiving member 13 protrudes upward from the support member 7 and the outer spring as described in claim 2. The receiving member 22 is constituted by a peripheral wall of the inverted bottomed cylindrical body 14 that covers the central spring receiving member 13, and the upper end top plate portion 21 of the inverted bottomed cylindrical body 14 is fixed to the lower side of the load receiving member 3. can do. In this case, as described in claim 3, the upper end of the center spring receiving member 13 is horizontally supported to slidably support the lower supported surface 24a of the upper end top plate portion 21 of the inverted bottomed cylindrical body 14. A support surface 19 a is formed, and the support means 9 can be constituted by the central spring receiving member 13 and the inverted bottomed cylindrical body 14. Further, in this case, as described in claim 4, the inverted bottomed cylindrical body 14 has an outer diameter larger than the width of the load receiving member 3, and the inverted bottomed cylindrical body 14 is used as the load receiving member 3. It can adhere to the said receiving member 3 in the state fitted to the notch part 25 provided in 1 from the lower side.

  In addition, as described in claim 5, at least one of the central spring receiving member 13 and the outer spring receiving member 22 can be provided with concave groove portions 13a and 22a into which the spiral coil spring 15 is inserted. .

  As the spiral coil spring, as described in claim 6, in addition to the spiral coil spring 15 formed by spirally winding a linear steel material on a horizontal two-dimensional plane, A spiral coil spring 26 formed by spirally winding a strip-shaped steel material on a horizontal two-dimensional plane, or a side surface obtained by spirally winding a linear steel material along a conical surface as described in claim 8 A spiral coil spring 27 having a trapezoidal view can be used.

  According to the load supporting device for a load storage rack according to the present invention, when the rack swings back and forth in the depth direction (the length direction of the load receiving member) of the load storage section when an earthquake occurs, the support member swings back and forth integrally with the rack. The relative movement against the urging force of the urging means occurs between the load receiving member supporting the load and the load receiving member, and the load receiving member supporting the load is integrated with the rack in the front-rear direction at the same speed and the same amplitude. No longer shakes. Therefore, when the rack swings to the opened passage side (forward), the load receiving member and the load on the load receiving member swing forward together, and the load slides on the load receiving member due to inertia. Depending on the situation, there is no risk of falling to the aisle side, and the desired seismic isolation effect can be obtained. The relative movement in the front-rear direction between the support member and the load receiving member is relatively moved in the horizontal two-dimensional direction against elasticity between the central portion and the outer peripheral portion of the spiral coil spring of the biasing unit constituting the biasing means. Since the spiral coil spring is elastically returned to the concentric state of the spiral coil spring after relative movement, the load receiving member automatically returns to the origin position on the support member. As long as the load does not slide on the load receiving member, the position of the load does not change unexpectedly in the front-rear direction, and the load can be continuously stored safely.

  Thus, according to the configuration of the present invention described in claim 1, the load receiving member is interposed between the support member provided continuously from the left and right partition walls of the load storage section and the load receiving member positioned thereon. Support means and urging means for urging and holding the load receiving member at a fixed position in the slidable region are disposed, so that a coil spring or the like is attached to the lateral side of the load receiving member in plan view as in the prior art. Compared with the case where the biasing means protrudes, the occupied space in plan view of the entire load supporting device is reduced to the same extent as the conventional load supporting device having no seismic isolation structure, which helps to increase the storage efficiency of the entire rack. .

  The urging unit constituting the urging means also surrounds the central spring receiving member that protrudes from one member of the support member and the load receiving member toward the other member side. The outer spring receiving member projecting from the other member toward the one member side, and a spiral coil spring interposed between the central spring receiving member and the outer spring receiving member. When the load receiving member is moved relative to the support member in the horizontal direction, the central portion and the outer peripheral portion of the spiral coil spring are moved relative to each other in the horizontal two-dimensional direction against elasticity, and the reaction force causes the load receiving member to move against the support member. Since the method of returning to the origin position is adopted, the seismic isolation effect can be exhibited in all directions of 360 degrees in the horizontal direction. In addition, although the wire diameter of the spiral coil spring is increased according to the weight of the load, and a large origin return force (centering force) and, in turn, quick origin return can be realized, Only a spiral coil spring and a pair of inner and outer spring receiving members are required, and the number of components can be reduced and the configuration can be made inexpensively. In addition, it can be easily disposed in a narrow vertical space between the support member and the load receiving member. . In other words, since the biasing means of the above-described type is used, the biasing means can be configured using the limited space between the support member and the load receiving member.

  According to the configuration of claim 2, the spiral coil spring interposed between the support member and the load receiving member is covered and protected from above by the inverted bottomed cylindrical body attached to the lower side of the load receiving member. Therefore, even when the width of the load receiving member is smaller than the outer diameter of the spiral coil spring and the spiral coil spring protrudes from the load receiver, other objects may come into contact with the spiral coil spring or dust may adhere to it. Disappears. Therefore, the load receiving member and the outer spring receiving member can be configured in sizes suitable for each without being restricted by each other.

  In this case, according to the configuration of the third aspect, a spiral spring is interposed between the center spring receiving member constituting the biasing unit and the inverted bottomed cylindrical body, in other words, between the support member and the load receiving member. Since the central spring receiving member necessary for mounting and the inverted bottomed cylindrical body can also serve as a supporting means for supporting the load receiving member so as to be slidable in the horizontal two-dimensional direction, In contrast to the case where the supporting means must be configured separately, the number of parts of the entire load supporting device can be greatly reduced, and the load supporting device can be configured compactly and inexpensively. Furthermore, according to the configuration of the fourth aspect, a spiral coil spring having an outer diameter sufficiently larger than the width of the load receiving member can be used, and the height from the upper surface of the support member to the upper surface of the load receiving member can be used. Can be kept low, and the entire load supporting device can be configured compactly.

  In addition, according to the configuration of claim 5, not only can the spiral coil spring be held at a predetermined position without fixing both ends of the spiral coil spring to the central spring receiving member and the outer spring receiving member, It is possible to prevent the relative movement area in the horizontal two-dimensional direction between the central spring receiving member and the outer spring receiving member from being restricted by the compression side of the spiral coil spring, and to increase the allowable displacement in the horizontal two-dimensional direction of the load receiving member. To help.

  As the spiral coil spring, one using the linear steel material according to claim 6 or one using the strip steel material according to claim 7 can be used. When a spiral coil spring having a trapezoidal shape in a side view is used, which is made of a linear steel material wound spirally along a surface, the central spring receiving member is used in the same manner as in the case of employing the configuration according to claim 5. It is possible to suppress the relative movement region in the horizontal two-dimensional direction between the outer spring receiving member and the outer spring receiving member from being restricted by the compression side of the spiral coil spring, and to increase the allowable displacement amount of the load receiving member in the horizontal two-dimensional direction. Nevertheless, it is not necessary for the outer spring receiving member to have a large diameter.

  FIG. 1 shows a basic configuration of a rack to which the load supporting apparatus of the present invention can be applied. Reference numeral 1 denotes a load storage section arranged in a grid pattern in both the upper, lower, left and right directions, and adjacent loads in the left and right lateral directions. A partition frame 2 is erected vertically between the storage compartments 1, and the load storage compartments 1 adjacent to each other in the vertical direction are separated by a pair of left and right load receiving members 3.

  Each partition frame 2 has a lattice structure in which a pair of front and rear support members 4a and 4b are connected to each other by a connecting member 5. On the back side of the load storage compartment 1, the rear support members 4b of each partition frame 2 are On the front side of the load storage section 1, that is, on the traveling passage side of the loading / unloading crane that loads and unloads the load storage section 1, the load is stored in the load storage section 1. It is known that the front strut members 4a of the partition wall frames 2 are connected to each other by a horizontal connecting member (not shown) at a level that does not interfere with taking in and out. The pair of left and right load receiving members 3 are rod-shaped members that are long in the loading / unloading direction of the load storage section 1, that is, the front-rear depth direction (X direction) of the load storage section 1, and the front and rear ends thereof are partition walls adjacent to the outside. The frame 2 is supported by a pair of front and rear support members 7 attached to both front and rear support members 4a and 4b.

  Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 2 to 6. Each load receiving member 3 is composed of a gate member 8 that is open on the lower side. A pair of front and rear support units 10A and 10B constituting the support means 9 and a pair of front and rear urging forces constituting the urging means 11 between the free end portions of the support member 7 extending downwardly. Units 12A and 12B are arranged. The urging units 12A and 12B have the same structure, and a central spring receiving member 13 protruding from the upper surface of the support member 7, an inverted bottomed cylindrical body 14 covering the central spring receiving member 13 from above, The spiral coil spring 15 is configured.

  The center spring receiving member 13 is attached to the upper surface of the support member 7 with a plurality of mounting bolts 16 and has a cylindrical body 17 provided with a notch step portion 17a (see FIG. 6) at the upper circumferential edge, and this cylindrical body. A circular pressure plate 18 having the same diameter as that of the cylindrical body 17 and a circular slide plate 19 having the same diameter as that of the circular body 17 and the circular slide plate 18. 19 and a circular presser plate 18 are composed of a plurality of mounting screws 20 for fixing the cylindrical body 17 to each other. The upper surface of the head of the mounting screw 20 is configured to be flush with the upper surface of the circular slide plate 19 or slightly recessed. Thus, an annular groove 13a is formed on the cylindrical surface of the central spring receiving member 13 by the notch step 17a formed at the upper circumferential edge of the cylindrical body 17 and the peripheral portion of the circular pressing plate 18. Is formed.

  The inverted bottomed cylindrical body 14 constitutes a cylindrical outer spring receiving member 22 with an annular peripheral wall integrally connected downward from the peripheral edge of the top plate portion 21 fixed to the lower side of the load receiving member 3. A supported surface 24a constituted by a circular slide plate 24 attached to the lower side of the top plate portion 21 by a plurality of mounting screws 23 is an upper end of the central spring receiving member 13, that is, a horizontal support surface 19a constituted by the circular slide plate 19. An annular concave groove portion 22 a is formed on the inner peripheral surface of the outer spring receiving member 22 at a position that is at the same level as the concave groove portion 13 a of the central spring receiving member 13. As shown in FIGS. 3 and 4, the inverted bottomed cylindrical body 14 is formed by cutting on both side vertical plate portions 8 a and 8 b of the gate-shaped member 8 that is open on the lower side at both ends in the length direction of the load receiving member 3. In a state where the top plate portion 21 of the inverted bottomed cylindrical body 14 is fitted to the notch portion 25 so as to protrude from the left and right sides and the end sides of the gate-shaped member 8 in plan view, the top plate portion is welded. 21 is fixed to the gate member 8.

  The spiral coil spring 15 is formed by winding a linear steel material in a spiral shape on a horizontal two-dimensional plane, and its inner end side C-shaped portion 15a is fitted in the concave groove portion 13a of the central spring receiving member 13. In the state, the diameter is reduced against elasticity, and the outer end side C-shaped portion 15 b is fitted into the concave groove portion 22 a of the outer spring receiving member 22. Specifically, before the circular holding plate 18 and the circular slide plate 19 constituting the central spring receiving member 13 are attached to the cylindrical body 17, a spiral is formed around the notch step portion 17 a at the upper circumferential edge of the cylindrical body 17. The inner end side C-shaped portion 15 a of the coiled coil spring 15 is fitted from above, and then the circular pressing plate 18 and the circular slide plate 19 can be attached to the upper end of the cylindrical body 17 with the mounting screw 20.

  The support units 10A and 10B include a center spring receiving member 13 (horizontal support surface 19a of the upper end circular slide plate 19) on the support member 7 side and an inverted bottomed cylindrical body 14 (circular shape) on the load receiving member 3 side in the urging units 12A and 12B. And a lower supported surface 24a) of the slide plate 24.

  The load receiving member 3 supported by the support member 7 by the support units 10A and 10B and the urging units 12A and 12B having the above-described configuration is the upper horizontal support surface 19a (the circular slide plate 19 of the circular slide plate 19) Since the lower supported surface 24a (the lower surface of the circular slide plate 24) of the inverted bottomed cylindrical body 14 on the load receiving member 3 side is supported by the upper surface), the peripheral wall (outer spring support) of the inverted bottomed cylindrical body 14 is supported. In the inner region of the member 22), specifically, as shown in FIG. 5, the spiral coil spring 15 is compressed in the horizontal direction between the central spring receiving member 13 and the outer spring receiving member 22, and is in close contact with each other. The outer spring receiving member 22 can slide in any direction 360 degrees in a horizontal two-dimensional direction at a certain level within a range until the outer spring receiving member 22 contacts the central spring receiving member 13. Further, since the spiral coil spring 15 is interposed between the central spring receiving member 13 and the outer spring receiving member 22 while being reduced in diameter against elasticity, the position of the load receiving member 3 is caused by the reaction force. However, the outer spring receiving member 22 is held at a position where it is concentric with the central spring receiving member 13.

  When the load is placed across the pair of left and right load receiving members 3 supported as described above, the load is applied to the top plate portion 21 of the inverted bottomed cylindrical body 14 in the two front and rear support units 10A and 10B. And the center spring receiving member 13. In such a state, when a horizontal external force that is strong enough to deform the spiral coil spring 15 in the horizontal direction acts relatively between the load receiving member 3 and the support member 7, the load receiving member 3 and the support member 7. As shown in FIG. 5, the spiral coil spring 15 is compressed in the horizontal direction between the central spring receiving member 13 and the outer spring receiving member 22 and is in close contact with each other, or the outer spring receiving member 22 is in contact with the central spring receiving member. The upper end horizontal support surface 19a (upper side surface of the circular slide plate 19) of the central spring receiving member 13 and the lower supported surface 24a (circular slide plate 24) of the inverted bottomed cylindrical body 14 within the range until contacting the member 13. The spiral coil spring 15 can be horizontally moved while being deformed in the horizontal direction with relative sliding between the lower surface and the lower surface.

  Therefore, when the rack swings in the front-rear depth direction (X direction) of the load storage section 1 due to an earthquake or the like, the support member 7 integral with the rack is biased to the load receiving member 3 supporting the load. The spiral coil spring 15 swings in the same direction against the elasticity of the spiral coil spring 15, and relative movement occurs between the load receiving member 3 supporting the load and the support member 7, and the load on the load receiving member 3 is almost swung. If it does not exist, or it swings with a small amplitude later than the swing of the support member 7, the desired seismic isolation effect can be obtained if the speed and amplitude of the swing are within the assumed range. Of course, the spiral coil springs 15 of the urging units 12A and 12B always attempt to automatically return so that the inner end side C-shaped portion 15a and the outer end side C-shaped portion 15b are substantially concentric by elastic return force. Therefore, when the rack swing is settled, the load receiving member 3 is automatically returned to the intended fixed position by the elastic return force of the spiral coil spring 15. At this time, the elastic return force of the spiral coil spring 15 causes the load receiving member 3 on which the load is mounted to return to the origin against the frictional force between the horizontal support surface 19a and the supported surface 24a of the support units 10A and 10B. Therefore, the frictional force between the horizontal support surface 19a and the supported surface 24a of the support units 10A and 10B must be configured to be as small as possible. For this reason, the horizontal support surface 19a and the supported surface 24a are different from the central spring receiving member 13 (circular pressing plate 18) and the inverted bottomed cylindrical body 14 and are separate members of the circular slide plate 19 made of a material having low frictional resistance. Further, it is desirable to use a circular slide plate 24.

  In the above-described embodiment, the pair of front and rear support columns 4a and 4b of the partition wall frame 2 supporting the support member 7 has an open cross section, and the support member 7 is attached as shown in FIG. 2C. Since the side wall plate portion 4c having a square cross section projecting sideways of the supporting column members 4a and 4b can be elastically deformed in the horizontal direction inside and outside, the inside and outside of the side wall plate portion 4c having a square cross section shape of the column materials 4a and 4b. If the direction is accompanied by elastic deformation in the horizontal direction, the relative movement in the horizontal direction between the support member 7 and the partition frame 2 is allowed to some extent. Therefore, depending on the shaking direction of the rack (partition wall frame 2) due to an earthquake or the like, in addition to the horizontal relative movement between the support member 7 and the load receiving member 3, the horizontal direction between the support member 7 and the partition frame 2 The relative movement also increases the seismic isolation effect for the load supported by the load receiving member 3. In FIG. 2C, reference numeral 7a denotes a mounting plate attached to the inner end of the support member 7. The mounting plate 7a is fitted on the side wall plate portion 4c having a square cross section projecting sideways of the column members 4a and 4b. , It is locked to the support material 4a, 4b by the connecting pin 7b.

  As shown in FIG. 7, the spiral coil spring may be a spiral coil spring 26 formed by spirally winding a strip-shaped steel material on a horizontal two-dimensional plane, or as shown in FIG. A spiral coil spring 27 having a trapezoidal shape in a side view, which is formed by winding a linear steel material in a spiral shape, may be used. Alternatively, the center spring receiving member 13 may be provided so as to protrude downward from the load receiving member 3 side, and the outer spring receiving member 22 may be provided on the support member 7 side. In this case, the inverted bottomed cylindrical body 14 is attached to the support member 7 in an upright state, and the upper surface of the circular slide plate 24 attached to the upper side of the top plate portion (bottom plate portion) 21 is placed horizontally on the support member 7 side. The lower surface of the circular slide plate 19 attached to the lower end of the central spring receiving member 13 can be used as a supported surface on the load receiving member 3 side. Further, the pair of left and right load receiving members 3 are located at locations that do not affect loading / unloading by the load transfer fork of the crane for loading and unloading, for example, the rear end portion of the load receiving member 3 and the space for moving the load transfer fork. On the lower side, the load receiving members 3 can be connected to each other by a connecting member.

Fig. A is a cross-sectional plan view of the main part for explaining the basic configuration of the load storage rack, and Fig. B is a front view of the main part. Fig. A is a plan view showing the load supporting device, Fig. B is a front view thereof, and Fig. C is an enlarged view of a portion C of Fig. A. It is a partially notched top view which shows the one side of a load support apparatus. It is the XX sectional view taken on the line of FIG. It is a figure which shows the YY sectional view taken on the line of FIG. 3 in the state which the load receiving member displaced to one side. It is a partially cutaway exploded perspective view showing one support unit and an urging unit. It is a vertical side view which shows the modification of an urging | biasing unit. It is a vertical side view which shows the other modification of an urging | biasing unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Load storage section 2 Bulkhead frame 3 Load receiving members 4a and 4b Support | pillar members 5 and 6 Connecting member 7 Support member 8 Portal member 9 Support means 10A, 10B Support unit 11 Energizing means 12A, 12B Energizing unit 13 Central spring receiving member 13a, 22a Concave groove 14 Inverted bottomed cylindrical body 15, 26, 27 Spiral coil spring 17 Column body (central spring receiving member)
18 Circular retainer plate 19 Circular slide plate (central spring receiving member)
19a Horizontal support surface 21 Top plate part 22 Outer spring receiving member 24 Circular slide plate 24a Supported surface 25 Notch

Claims (8)

  A pair of left and right load receiving members that are long in the front-rear depth direction of the load storage compartment are horizontally installed inside the left and right bulkhead frames of the load storage compartment. The support member is disposed, and between the support member and the load receiving member, a support means for slidably supporting the load receiving member within a fixed range in the horizontal two-dimensional direction, and the load receiving member within the slidable region. A load supporting device for a load storage rack provided with an urging means for urging and holding at a fixed position, wherein the urging means are arranged at least at two positions in a length direction of the load receiving member. A biasing unit is provided, and each biasing unit surrounds the central spring receiving member and a central spring receiving member projecting from one member of the support member and the load receiving member toward the other member side. Like the other member For storing the load, comprising an outer spring receiving member protruding toward the one member side, and a spiral coil spring interposed between the central spring receiving member and the outer spring receiving member. Rack load support device.   The center spring receiving member protrudes upward from the support member, and the outer spring receiving member is constituted by a peripheral wall of an inverted bottomed cylindrical body that covers the center spring receiving member. The load supporting device for a load storage rack according to claim 1, wherein an upper end top plate portion of the cylindrical body is fixed to a lower side of the load receiving member.   A horizontal support surface that slidably supports a lower supported surface of the upper end top plate portion of the inverted bottomed cylindrical body is formed at an upper end of the center spring receiving member. The center spring receiving member and the inverted bottomed bottom The load supporting device for a load storage rack according to claim 2, wherein a cylindrical body constitutes the supporting means.   The inverted bottomed cylindrical body has an outer diameter larger than the width of the load receiving member, and the inverted bottomed cylindrical body is fitted in a notch provided in the load receiving member from below. The load supporting device for a load storage rack according to claim 3, wherein the load supporting device is fixed to the load receiving member.   5. The load storage rack according to claim 1, wherein a concave groove portion into which the spiral coil spring enters is formed in at least one of the central spring receiving member and the outer spring receiving member. Load support device.   The load supporting device for a load storage rack according to any one of claims 1 to 5, wherein the spiral coil spring of the urging unit is made of a linear steel material wound spirally on a horizontal two-dimensional plane.   The load supporting device for a load storage rack according to any one of claims 1 to 5, wherein the spiral coil spring of the biasing unit is made of a strip-shaped steel material wound in a spiral shape on a horizontal two-dimensional plane.   The load supporting device for a load storage rack according to any one of claims 1 to 5, wherein the spiral coil spring of the biasing unit is made of a linear steel material wound spirally along a conical surface.

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