JP4849230B2 - Load support device for load storage rack - Google Patents

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. In this type of seismic isolation structure, an urging means for returning the load receiving member to the origin is essential, but those using a viscoelastic body as this urging means are compared with those using a spring, Since the damping effect of shaking is as great as that using a gas damper, it is desirable as an urging means in a seismic isolation structure. For example, as described in Patent Document 1, a conventionally known load storage rack The seismic isolation structure using the viscoelastic body in the load support apparatus of this type is a structure in which a thin plate-like viscoelastic body is sandwiched between the load receiving member and the support member that supports it.
JP 2003-118818 A

  In the conventional seismic isolation structure as described in Patent Document 1, the characteristics of the viscoelastic body cannot be fully utilized, and the seismic isolation effect as much as that cannot be expected.

The 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 for a load storage rack according to claim 1. These are shown with reference numerals in the embodiments described later, and a pair of left and right load receiving members 3 that are long in the front-rear depth direction of the load storage section 1 are horizontally provided inside the left and right partition walls 2 of the load storage section 1. A load supporting device for a load storage rack that is erected, and a support member 9 that is continuous from the left and right partition wall frames 2 is disposed below the load receiving member 3, and the support member 9 and the load receiving member 3 is a supporting means for supporting the load receiving member 3 at least within a certain range in the front-rear depth direction of the load storage section 1 (in the first embodiment, the holding tubular body 16 of the biasing means 11). And the cover plate 18) An urging means 11 for urging and holding the retaining member 3 at a fixed position in the slidable region is disposed. The urging means 11 is a vertical surface on the load receiving member 3 side (an outer peripheral vertical surface 14a of the positioning pin 14) ) And a vertical surface on the side of the support member 9 (the inner peripheral vertical surface 16a of the holding cylindrical body 16) is provided with at least one urging unit 12A having a viscoelastic body 19, The support means (in the first embodiment, the holding cylindrical body 16 and the cover of the biasing means 11 and the cover) that the viscoelastic body 19 receives a compressive force in the vertical direction between the load receiving member 3 and the support member 9. In the load support device of the load storage rack configured to prevent the plate 18)
The urging unit 12A includes a vertical positioning pin 14 that is fixedly projected on one of the support member 9 and the load receiving member 3, a viscoelastic body 19 that is externally fitted to the positioning pin 14, and this A vertical holding cylindrical body 16 attached to the other member so as to surround the viscoelastic body 19,
The free end of the holding cylindrical body 16 is provided with a sliding surface 18a that comes into contact with the supported surface portion 20 of the member on which the positioning pin 14 protrudes, and is provided with the holding cylindrical body 16. The force unit 12A also serves as the support means .

In carrying out the present invention having the above-described configuration, as described in claim 2, when the left and right partition wall frames 2 of the load storage compartment 1 are provided with a pair of front and rear support members 4a and 4b, the support members 4a and 4b are provided. Can have a cross-sectional shape with the inner sides facing each other open, and the support members 9, 24, 25 can be attached to the side wall plate portions 4c of the front and rear support members 4a, 4b.

  According to the load supporting device for a load storage rack according to the present invention having the above-described configuration, when the rack swings in the front-rear depth direction (the length direction of the load receiving member) of the load storage section when an earthquake occurs, Relative movement occurs against the urging force of the urging means between the swinging support member and the load receiving member supporting the load, and the load receiving member supporting the load is integrated with the rack at the same speed and amplitude. It will not swing back and forth. 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 realized by compressing the viscoelastic body of the urging unit constituting the urging means in the front-rear direction against elasticity. After that, since the viscoelastic body elastically returns to the original thickness in the front-rear direction, the load receiving member automatically returns to the origin position on the support member, so the load position is changed in the front-rear direction unless the load slides on the load receiving member. The load can be safely and continuously stored.

  Thus, according to the configuration of the present invention described in claim 1 above, the vertical downward load acting on the load receiving member does not act on the viscoelastic body, and the horizontal direction is between the support member and the load receiving member. Compared with a configuration in which a normal load is applied to the viscoelastic body and a configuration using the elasticity in the shear direction of the viscoelastic body As a result, the service life of the viscoelastic body is prolonged, and the characteristics of the viscoelastic body can be sufficiently exerted over a long period of time to obtain an effective seismic isolation effect.

Furthermore, according to the configuration of the present invention, it is possible to achieve with obtaining integration and simple easily and reliably row position of the viscoelastic body, compared to significant cost reduction in the case of providing a separate support means and urging unit .

In addition, according to the configuration of claim 2 , even when the seismic force (amplitude) is large and a sufficient seismic isolation effect cannot be expected only by relative movement of the load receiving member within the allowable slide region with respect to the support member, The support member itself is made to move relative to the rack in the front-rear and horizontal directions by using the elastic deformation in the lateral direction of the side wall plate portion of the column material constituting the partition wall frame of the rack, thereby supplementing the seismic isolation effect. be able to. Therefore, the viscoelastic body used in the urging unit of the urging means is useful for downsizing.

  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 material (not shown) at a level that does not interfere with loading and unloading. 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. It is supported by a pair of front and rear arm members 7 attached to both front and rear support members 4a and 4b of the frame 2.

  Hereinafter, one embodiment of the present invention will be described in detail. Each load receiving member 3 is composed of a lower gate member 8 as shown in FIG. 2B, and below each load receiving member 3, As shown in FIG. 2, a support member 9 parallel to the load receiving member 3 is fixed to the inner ends of a pair of front and rear arm members 7 attached to the front and rear support members 4a and 4b of the partition wall frame 2 adjacent to the outside. It is constructed by doing. As is well known in the art, the outer ends of the pair of front and rear arm members 7 are fixed to an attachment member 10 that is attached to both front and rear support members 4a and 4b so that the height can be freely changed. Both the front and rear support members 4a and 4b have a cross-sectional shape with the inner sides facing each other open, and the mounting member 10 has a rectangular cross-section projecting sideways of the support members 4a and 4b as shown in FIG. 2C. It is locked by a pin 10a in a state of being fitted on the side wall plate portion 4c.

  The support member 9 is made of a mold material formed by bending a belt-like plate, and has a top plate portion 9a that is narrower than the portal member 8 constituting the load receiving member 3 and parallel to the top plate portion 8a. I have. Between the top plate portion 9a of the support member 9 and the top plate portion 8a of the gate-shaped member 8 constituting the load receiving member 3, an urging means 11 also serving as a support means is disposed. As shown in FIGS. 2 and 3, the urging means 11 includes urging units 12 </ b> A to 12 </ b> C that are interposed at three portions, that is, both ends in the length direction of the load receiving member 3 and the central portion.

  Each of the urging units 12A to 12C has the same structure, and as shown in FIGS. 4 and 5, a vertical screw attached to the lower side of the top plate portion 8a of the load receiving member 3 (gate shape member 8) with a mounting screw 13. A cylindrical positioning pin 14 facing in the vertical direction, a vertical holding cylindrical body 16 having a plurality of circumferential positions attached to the upper side of the top plate portion 9a of the support member 9 with mounting bolts 15, and this holding cylindrical body The ring-shaped cover plate 18 is attached to the upper end of 16 with a plurality of mounting screws 17 in the circumferential direction, and the annular viscoelastic body 19 is fitted into the holding cylindrical body 16. The inner diameter of the annular viscoelastic body 19 is a size that allows the positioning pin 14 to be inserted, and the height is substantially equal to the height of the holding cylindrical body 16. The positioning pin 14 has a length slightly shorter than the total height of the holding cylindrical body 16 including the cover plate 18.

  Each of the urging units 12A to 12C can be incorporated as follows. That is, if the holding cylindrical body 16 is attached to a predetermined position on the top plate portion 9a of the support member 9, the viscoelastic body 19 is fitted into the holding cylindrical body 16 and the cover plate 18 is attached. The load receiving member 3 having the positioning pins 14 attached thereto at predetermined positions is placed on the support member 9 so that each positioning pin 14 is inserted into the central hole of the viscoelastic body 19 in the holding cylindrical body 16 on the support member 9 side. And the lower surface of the top plate portion 8a of the load receiving member 3 (the gate-shaped member 8) is brought into contact with the upper surface of the cover plate 18 of the holding cylindrical body 16 in each of the urging units 12A to 12C. At the same time that the load receiving member 3 is horizontally supported at a predetermined level, the assembly of the urging units 12A to 12C between the load receiving member 3 and the support member 9 is completed.

  As described above, the viscoelastic body 19 in each of the urging units 12A to 12C incorporated between the load receiving member 3 and the support member 9 includes the inner peripheral vertical surface 16a of the holding cylindrical body 16 and the positioning pin 14. Between the outer peripheral vertical surfaces 14a. The outer diameter of the holding cylindrical body 16 is slightly smaller than the inner width between the left and right side plate portions 8b, 8c of the load receiving member 3 (the gate-shaped member 8). Therefore, the load receiving member 3 and the support member 9 are annular viscoelasticity between the outer peripheral vertical surface 14a of the positioning pin 14 and the inner peripheral vertical surface 16a of the holding cylindrical body 16 in each of the urging units 12A to 12C. Relative movement on a horizontal two-dimensional plane including the front-rear depth direction (X direction) of the load storage compartment 1 and the left-right direction orthogonal to the X direction by the action of compressing the body 19 in the horizontal radial direction. Can do. At this time, the lower surface of the top plate portion 8a of the load receiving member 3 (the gate member 8) is in sliding contact with the upper surface of the cover plate 18 of the holding cylindrical body 16 in each of the urging units 12A to 12C. The upper surface of 18 is a sliding surface 18a that supports the load receiving member 3, and the lower surface of the top plate portion 8a that is in sliding contact with this is the supported surface portion 20. Therefore, it is desirable that the cover plate 18 be made of a material having a low frictional resistance. Of course, the lower surface of the top plate portion 8a is used as the supported surface portion 20 as it is. However, a sliding plate made of a material having a low frictional resistance is provided below the top plate portion 8a, and the lower surface of the sliding plate is supported. The surface portion 20 can also be used.

  In the horizontal relative movement between the load receiving member 3 and the support member 9 described above, the horizontal relative movement in the front-rear depth direction (X direction) of the load storage section 1 is the horizontal radial direction of the viscoelastic body 19 in each of the urging units 12A to 12C. The horizontal relative movement in the horizontal direction orthogonal to the X direction is the compression limit in the horizontal radial direction of the viscoelastic body 19 in each of the urging units 12A to 12C or the holding cylindrical body 16 And the left and right side plate portions 8b, 8c of the load receiving member 3 (the gate-shaped member 8).

  When a load is stored and stored in the load storage section 1 having the load supporting device having the above configuration, the load is placed across the pair of left and right load receiving members 3, and the load at that time is It is received by the support member 9 via the cover plate 18 and the holding cylindrical body 16 in the three urging units 12A to 12C in the front-rear direction, and does not act on the viscoelastic body 19. In other words, in the above-described embodiment, the cover plate 18 and the holding cylindrical body 16 in the urging units 12A to 12C support the load receiving member 3 so as to be slidable horizontally without applying a load to the viscoelastic body 19. It also serves as a means.

  Thus, 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 9 integral with the rack is biased to the load receiving member 3 supporting the load. Oscillates in the same direction against the elasticity in the horizontal radial direction of the viscoelastic body 19 of ˜12C, relative movement occurs between the load receiving member 3 supporting the load and the support member 9, and the load receiving member 3 The load is hardly swayed or swayed with a small amplitude later than that of the support member 9. If the speed and amplitude of the sway are within the assumed range, the desired seismic isolation effect can be obtained. Of course, the viscoelastic body 19 of the urging units 12A to 12C always tries to automatically return to the desired radial state with the elastic return force, so that when the rack swing is stopped, the elastic return force of the viscoelastic body 19 is reduced. Thus, the load receiving member 3 is automatically returned to the intended fixed position. At this time, the elastic restoring force of the viscoelastic body 19 causes the load receiving member 3 on which the load is mounted to slide the sliding surface 18a (the upper surface of the cover plate 18) on the support member 9 side of each of the urging units 12A to 12C and the load receiving member 3. Since the origin is returned against the frictional force with the supported surface portion 20 on the side, the frictional force between the sliding surface 18a and the supported surface portion 20 must be configured to be as small as possible. Don't be.

  In the above embodiment, the pair of front and rear support columns 4a and 4b of the partition wall frame 2 supporting the support member 9 via the arm member 7 has an open cross section as shown in FIG. 2C. Since the side wall plate 4c having a square cross section projecting sideways of the column members 4a and 4b to which the arm member 7 is attached can be elastically deformed in the horizontal direction inside and outside, the square cross section of the column members 4a and 4b is rectangular. If the side plate 4c is in a direction accompanied by elastic deformation in the inner and outer horizontal directions, the horizontal relative movement between the support member 9 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 9 and the load receiving member 3, the horizontal direction between the support member 9 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 the above embodiment, the positioning pins 14 in the urging units 12A to 12C are projected from the support member 9 side, and the holding cylindrical body 16 is placed on the top plate portion 8a side of the load receiving member 3 (gate shape member 8). It may be attached. 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 cutaway side view showing one side of the load supporting device. It is a vertical side view which shows one urging | biasing unit used also as a support means. It is the sectional view on the AA line of FIG .

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 Arm material 8 Gate shape material 8a Top plate portions 8b and 8c of the gate shape material Left and right side plate portions 8d of the gate shape material Vertical plate parts 8e, 8f of both ends
9 Support members
9a Top plate portion 10 of support member Mounting member 11 Energizing means 12A to 12C Energizing unit
14 positioning pin 16 holding tubular body 18 the cover plate 18a sliding surface
19 Viscoelastic body

Claims (2)

A load supporting device for a load storage rack in which a pair of left and right load receiving members extending in the front-rear depth direction of the load storage compartment are horizontally installed inside the left and right partition walls of the load storage compartment, On the side, a support member connected from the left and right partition walls is disposed, and between the support member and the load receiving member, the load receiving member is slid at least within a certain range in the front-rear depth direction of the load storage section. And a supporting means for supporting the load receiving member and a biasing means for biasing and holding the load receiving member at a fixed position in the slidable region. The biasing means includes a vertical surface on the load receiving member side and the support member. Comprising at least one biasing unit having a viscoelastic body sandwiched between a vertical surface on the side, and the viscoelastic body exerts a compressive force in the vertical direction between the load receiving member and the support member. Receiving said support means In load support apparatus configured load storage rack to prevent,
The urging unit includes a vertical positioning pin fixedly projected on one of the support member and the load receiving member, a viscoelastic body externally fitted to the positioning pin, and surrounding the viscoelastic body. It consists of a vertical holding cylinder attached to the other member,
The free end of the holding cylindrical body is provided with a sliding surface that comes into contact with the supported surface portion of the member on which the positioning pin protrudes, and the urging unit including the holding cylindrical body supports the support A load supporting device for a load storage rack configured to also serve as a means . The left and right bulkhead frames of the load storage compartment are provided with a pair of front and rear support members, each support member has a cross-sectional shape with the inner sides facing each other open, and the support member is a side wall plate of both front and rear support members. The load supporting device for a load storage rack according to claim 1 , wherein the load supporting device is attached to the portion .

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