JP2016077770A - Fall prevention device, and shelf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fall prevention device stably performing an operation for preventing fall of a storage object placed on a shelf board, and a shelf including the same.SOLUTION: A fall prevention device P includes: a base 1 fitted to a shelf board T1; a fall prevention body 2 supported on the base 1 and capable of being operated between a retreat position allowing taking in and out of a storage object X on the shelf board T1, and a fall prevention position inhibiting the storage object X on the shelf board T1 from falling from the shelf board T1; and an operative mechanism moving the fall prevention body 2 from the retreat position to the fall prevention position by applying gravity force generated when a weight falls, to the fall prevention body 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fall prevention device for preventing a fall of stored items placed on a shelf board when a vibration caused by an earthquake or the like occurs, and a shelf provided with the fall prevention device.

  Conventionally, when a vibration due to an earthquake or the like is detected, the fall-prevention bar can be dropped from a retreat position that does not interfere with the removal of the stored item in order to prevent the stored item placed on the shelf board from dropping. There are various conceivable ones configured to operate in a fall prevention position for preventing the above (see, for example, Patent Document 1).

  In this type of conventional device, when a vibration such as an earthquake is detected, the fall prevention bar is moved in the direction of the fall prevention position in advance by a coil spring or the like so that the fall prevention bar can be moved to the fall prevention position. Is being energized. The fall prevention bar is held in the retracted position against the urging force of the coil spring or the like by a separately provided lock mechanism, and the lock mechanism locks by the lock release mechanism provided separately when vibration is detected. To cancel.

  That is, in the conventional one, the fall prevention bar always receives a considerable biasing force for moving to the fall prevention position by the coil spring or the like in the retracted position, and the coil spring or the like is separately provided by a lock mechanism separately provided in that state. Movement to the fall prevention position is prevented against a considerable biasing force.

  Since the conventional one has the configuration described above, it is necessary to take into account the biasing force of coil springs, etc. with many variations, and the shape and structure of parts applied to the locking mechanism and unlocking mechanism. It is essential to ensure that the desired behavior occurs. For this reason, in the conventional product, the operation to prevent the fall of the stored item in response to the constant vibration is not performed stably, and the fall of the stored item in response to the constant vibration is prevented. There has been a problem that extremely precise settings are required in order to stably perform the operation for this purpose.

JP 2014-68998 A

  The present invention has been made paying attention to the above-described circumstances, and at least stably operates to prevent falling of stored items placed on the shelf plate in response to a certain vibration. It is providing the fall prevention apparatus which can be performed, and the shelf provided with the said fall prevention apparatus.

  That is, the present invention has the following configuration.

  The invention according to claim 1 is a fall prevention device provided on a shelf for placing stored items, a base attached to the shelf, and a base supported by the base and placed on the shelf. Moreover, the fall prevention which can operate | move from the retraction position which does not inhibit the taking in / out of the said stored article to the fall prevention position which can prevent the said stored article mounted in the said shelf board falling from the said shelf board. Body and a weight that is held at the set position and when a vibration of a certain level or more is applied to the fall position from the set position, and the gravity when the weight falls acts on the fall prevention body And an operating mechanism for operating the fall prevention body from the retracted position to the fall prevention position.

  Here, “prevention” is not limited to the meaning of completely preventing it, but is a concept including the meaning of suppression, for example.

  Further, “vibration” means shaking and is mainly caused by an earthquake, but is not necessarily limited to an earthquake. For example, vibrations may be caused by an earthquake, or may be caused by an external object colliding with a structure such as furniture provided with a shelf board, or may be caused by an external force such as a strong wind. .

  Invention of Claim 2 is the structure of Claim 1, The said fall prevention body is supported by the said base so that vertical rotation is possible, The arm which extended the front-end | tip part ahead of the said shelf board, A retraction position set at a position lower than the upper surface of the shelf board and a fall prevention position set at a position higher than the upper surface of the shelf board as the arm is turned and attached to the tip of the arm. And a fall prevention bar that moves up and down.

  According to a third aspect of the present invention, in the configuration according to the second aspect, a pair of bases are attached to the left and right of the shelf board, and the fall prevention bodies are respectively supported by the respective bases. And an anti-falling bar laid between the tips of both arms.

  According to a fourth aspect of the present invention, in the configuration according to the third aspect, the operating mechanism is held only by the one base, and the tip of each arm supported by the both bases, the fall prevention bar, Are rigidly connected.

  According to a fifth aspect of the present invention, in the configuration according to the third or fourth aspect, the base abuts a front end of the base on a back surface of a front column in a shelf support structure that supports the shelf. It is mounted on a shelf board.

  According to a sixth aspect of the present invention, in the configuration of the second, third, fourth, or fifth aspect, the weight is attached to an upper end portion of a link member that is supported by the base so as to be pivotable in the front-rear direction. The ring member has a standby position where the center of gravity of the weight is displaced in one direction from the rotation center of the link member, and the center of gravity of the weight is in the other direction from the rotation center of the link member. It is rotated between the displaced fall prevention position, and a pressing member is provided at the lower end portion of the link member to push up the arm in accordance with the turning operation from the standby position to the fall prevention position. It is what.

  The invention according to claim 7 is a shelf, and the fall prevention device according to claim 1, 2, 3, 4, 5 or 6 is provided on the shelf board.

  As described above, according to the present invention, the fall prevention device capable of stably performing the operation for preventing the fall of the stored items placed on the shelf plate in response to the constant vibration, and A shelf provided with the fall prevention device can be provided.

The perspective view which shows one Embodiment of this invention. The perspective view in the embodiment. The exploded perspective view in the embodiment. The exploded perspective view in the embodiment. The side view in the embodiment. The side view in the embodiment. The side view corresponding to FIG. 5 which shows other embodiment. The side view corresponding to FIG. 6 which shows other embodiment. The typical side view which shows other embodiment. The typical side view which shows other embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 5 and 6 show a case where a cover body 12 (described later) constituting the base 1 is omitted for convenience of explanation.

  In this embodiment, the present invention is applied to a fall prevention device P that is mounted on a shelf T that is furniture that can store the stored items X on the shelf plate T1. In other words, the fall prevention body 2 is normally positioned on the shelf T so as not to obstruct the loading and unloading of the stored item X so as to facilitate the workability of a worker or the like. An anti-seismic operation type fall prevention device P configured to prevent the fall prevention body 2 from being dropped from the stored item X placed on the shelf board T is provided. The fall prevention device P is configured to be detachable from the shelf T.

  Hereinafter, the shelf T and the fall prevention device P will be described in detail.

  The shelf T is also referred to as a rack. In the vertical direction, the shelf support structure T2 includes a front column T21 that is a left and right front shelf receiving member and a rear column T22 that is a left and right rear shelf receiving member. A plurality of rectangular plate-like shelf boards T1 are attached. In this embodiment, the left and right end portions of the shelf board T1 are respectively positioned on the back surface T21a side of the front pillar T21. The front pillar T21 and the rear pillar T22 of the shelf T have a substantially square pillar shape.

  The fall prevention device P is mounted on the shelf T described above. The fall prevention device P is provided on a shelf plate T1 on which the stored item X is placed. The fall prevention device P can be attached to an arbitrary shelf T1 in which the stored item X may be dropped when an earthquake occurs.

  The fall prevention device P includes the base 1 attached to the shelf T1, and the shelf board from the retracted position (D) that is supported by the base 1 and does not hinder the loading and unloading of the stored items X placed on the shelf T1. A fall prevention body 2 operable between a fall prevention position (U) capable of preventing the stored item X placed on T1 from dropping from the shelf board T1, and a set position (S) And a weight W that performs a drop operation from the set position (S) to the drop position (F) when a vibration of a certain level or more is applied to the fall position to prevent gravity from falling when the weight W falls. And an actuating mechanism 3 that acts on the body 2 to actuate the fall prevention body 2 from the retracted position (D) to the fall prevention position (U).

  Hereinafter, each configuration of the fall prevention device P will be described in detail.

  The base 1 is made of resin and has a base body 11 as a housing in which an accommodation space sp for accommodating the operating mechanism 3 is formed, and a cover body 12 for closing the accommodation space sp formed in the base body 11. And. In this embodiment, the base 1 is attached to the left and right sides of the shelf board T1, respectively. That is, the base 1 is arranged on the left and right of the shelf board T1, and the left base 1 and the right base 1 are symmetrical.

  The base body 11 has a substantially box-like shape having an accommodation space sp for accommodating the arm 21 and the operating mechanism 3 constituting the fall prevention body 2 therein and opened outward. The base body 11 has a bottom wall 111 that contacts the top surface of the shelf T1, a rear wall 112 that extends upward from the rear end of the bottom wall 111, and an upper end that extends upward from the inner end of the bottom wall 111. A side wall 113, an upper wall 114 extending outward from the upper end edge of the side wall 113, and a front wall 115 extending outward from the front end edge of the side wall 113 are provided.

  The bottom wall 111 is configured such that the lower surface thereof can be brought into contact with the upper surface of the front portion at the side edge portion of the shelf board T1. On the upper surface side of the bottom wall 111, a bracket support portion 111a for supporting a bracket 13 for mounting the base body 11 on the shelf board T1 is provided. The bracket support portion 111a includes a long hole 111b that is a screw insertion hole extending in the vertical direction. The screw v1 that has passed through the long hole 111b can be screwed into the nut hole 131 of the bracket 13. That is, since the elongated hole 111b extending in the vertical direction is provided in the bracket support portion 111a, the vertical position of the bracket 13 can be appropriately adjusted according to the thickness dimension of the shelf board T1. The bracket 13 includes a horizontal portion 13a and an upright portion 13b, and is made of metal having a substantially L shape in a front view, and the nut hole 131 is provided in the upright portion 13b.

  The side wall 113 has a support shaft 113a that protrudes toward the outer side on the accommodation space sp side at the rear portion and rotatably supports the rear end portion of the arm 21 of the fall prevention body 2. Further, the side wall 113 protrudes outward at a substantially central portion in the front-rear direction and the up-down direction, and a link member holding portion 113b that holds the link member 31 constituting the operating mechanism 3 so as to be rotatable about the axis j. A posture holding projection 113c that engages with a weight W that constitutes the actuation mechanism 3 and holds the actuation mechanism 3 at a set position (S) that is a fixed tilt orientation, and a pressing element 32 that constitutes the actuation mechanism 3 It has a long hole-shaped window 113d for exposing the front end side toward the storage space side of the storage item X on the shelf board T1 which is the inner side. Further, the side wall 113 includes a projection 113e that protrudes from the upper portion of the support shaft 113a and engages with the weight W at the drop position (F) to hold the operating mechanism 3 at the drop position (F). Yes. A spacer 113f is provided on the side wall 113 on the upper side of the link member holding portion 113b so as to partially surround the periphery of the link member holding portion 113b so as to suppress the blurring of the link member 31 in the lateral direction. ing. The posture holding projection 113c is configured to be able to change its position in the front-rear direction. The posture holding projection 113c is a sensitivity adjusting means for adjusting sensitivity to vibration of the operating mechanism 3 (that is, sensitivity to shaking for operating from the set position (S) to the drop position (F)). It constitutes. Of course, the sensitivity adjusting means is not limited to the protrusion 113c, and an appropriate structure may be adopted.

  The front wall 115 has a communication portion 115a that is a notch for communicating the arm 21 of the fall prevention body 2 from the accommodation space sp to the front external space at the lower portion.

  The cover body 12 is a plate-shaped member made of metal, and is formed in a shape that can substantially close the outer open portion of the base body 11. The cover body 12 includes a hole 121 serving as a shaft support portion that supports the distal end portion of the support shaft 113a of the base body 11, and a notch portion 122 for avoiding interference with the bracket support portion 111a. Further, the cover body 12 is formed with a plurality of holes 123 in the front-rear direction, which are positions corresponding to the protrusions 113c, for supporting the tip portions of the posture-holding protrusions 113c.

  The base 1 described above is mounted on the shelf plate T1 with its front end abutting against the back surface T21a of the front column T21 in the shelf support structure T2 that supports the shelf plate T1.

  Next, the fall prevention body 2 will be described.

  The fall prevention body 2 is supported by the base 1 so as to be pivotable up and down, and has an arm 21 with a tip 21a extending forward of the shelf T1, and the arm 21 attached to the tip 21a of the arm 21. Between the retracted position (D) set at a position lower than the upper surface of the shelf board T1 and the fall prevention position (U) set at a position higher than the upper face of the shelf board T with the rotation of the shelf board T1. And a fall prevention bar 22 that moves up and down. In other words, the fall prevention body 2 includes a pair of left and right arms 21 supported by the respective bases 1, and a fall prevention bar 22 constructed between the tip portions 21 a of both the arms 21. It is U-shaped in plan view. The tip 21a of each arm 21 supported by the both bases 1 and the fall prevention bar 22 are rigidly connected. In this embodiment, the tip 21a of each arm and the end of the fall prevention bar 22 are tightly connected via a screw v2. For this reason, the fall prevention bar 22 is supported in a state in which relative rotation with respect to each arm 21 is suppressed.

  The arm 21 extends in the front-rear direction and is made of resin. The arm 21 has a shape in which a central portion in the front-rear direction is recessed downward so as to avoid the link member holding portion 113b and a shape in which the front portion hangs downward. A through hole 211 extending in the left-right direction through which the support shaft 113a is inserted is provided at the rear end of the arm 21. A spacer y mounted on the support shaft 113a is disposed between the arm 21 and the cover body 12. The distal end portion 21a of the arm 21 is provided with a through hole 212 extending in the left-right direction into which the end portion of the fall prevention bar 22 extending in the left-right direction is inserted. A screw insertion hole 213 communicating with the through hole 212 is provided on the lower surface of the distal end portion 21 a of the arm 21. That is, with the end of the fall prevention bar 22 inserted into the through hole 212, the arm 21 and the fall prevention bar 22 are rigidly coupled by screwing the screw v2 that has passed through the screw insertion hole 213 from below. It has become so.

  The fall prevention bar 22 is made of metal that extends in the left-right direction and has a dimension that is approximately similar to the width of the left and right front pillars T21 that support the shelf T1. The fall prevention bar 22 is configured to be able to come into contact with the front side portion of the stored item X when a shake such as an earthquake occurs in the fall preventing position (U), and directly prevents the stored item X from falling. It has a function to perform. The fall prevention bar 22 is located between a fall prevention position (U) where the stored item X can be prevented from falling from the shelf plate T1 and a retreat position (D) which does not interfere with the removal and insertion of the stored item X on the shelf plate T1. It can move up and down. When the fall prevention bar 22 is set to be disposed at a height position substantially corresponding to the front edge of the shelf board T1 at the retracted position (D), in other words, the fall prevention bar 22 is moved to the retracted position ( In D), when it falls within the thickness of the shelf board T1, the fall prevention bar 22 does not interfere with the taking in and out of the stored items with respect to the other shelf boards arranged under the shelf board T1.

  Next, the operation mechanism 3 will be described.

  The operating mechanism 3 is held at a set position (S) set in a stage before an earthquake or the like occurs, and when a vibration due to an earthquake of a magnitude greater than a certain level is applied, the operating mechanism 3 drops from the set position (S) ( F) is mainly composed of a weight W that performs a drop operation. In other words, the operation mechanism 3 has a seismic function and is configured to be movable between the set position (S) and the drop position (F).

  In this embodiment, the weight W is attached to the upper end portion of the link member 31 whose intermediate portion is supported by the base 1 so as to be rotatable in the front-rear direction. The link member 31 constituting the operating mechanism 3 has a standby position (J) where the center of gravity W1 of the weight W is displaced to the front side in one direction with respect to the rotation center 31a of the link member 31, and the center of gravity W1 of the weight W. The link member 31 rotates with respect to the fall prevention position (K) displaced rearward in the other direction from the rotation center 31a. The link member 31 is provided with a pusher 32 for pushing up the arm 21 in accordance with a rotation operation from the standby position (J) to the fall prevention position (K) at the lower end portion thereof.

  The weight W has a certain weight to directly push up the fall prevention body 2 and is mainly composed of a plurality of metal plates. In this embodiment, the weight W is fixed to the upper end portion of the link member 31 by a screw v3 in a state where the position of the center of gravity W1 is displaced to the front side from the center line viewed from the side of the link member 31. .

  The link member 31 is a flat plate bar made of metal and has a posture extending in the vertical direction at the standby position (J). The link member 31 is supported by the base body 11 via the axis j so as to be rotatable in the front-rear direction. The link member 31 is held in a slightly forward tilted state at the standby position (J).

  The pressing element 32 is for contacting the lower surface of the arm 21 to push up the arm 21, and protrudes inward from the lower end of the link member 31. In this embodiment, the pressing element 32 is made of a resin having a cylindrical shape, and is attached to the link member 31 so as to be rotatable. The tip 32 a of the pressing element 32 is exposed inward through the window 113 d of the base body 11. With this configuration, an operation for returning the fall prevention body 2 from the fall prevention position (U) to the retracted position (D) can be easily realized by moving the presser 32. ing. That is, in a state where the link member 31 of the operating mechanism 3 is in the fall prevention position (K), the pressing member 32 arranged at the lower end thereof is moved along the window 113d with, for example, fingers, and the link member 31 is put on standby. When returning to the position (J), the fall prevention body 2 having the arm 21 engaged with the presser 32 is returned from the fall prevention position (U) to the retracted position (D).

  In this embodiment, only the one base 1 (right base 1) holds the operating mechanism 3 mainly composed of the weight W, the link member 31, and the pressing element 32. The operating mechanism 3 may be held on both the left and right bases 1.

  The arm 21 of the fall prevention body 2 and the operation mechanism 3 constituting the fall prevention device P are held in the base 1 and unitized. In other words, the fall prevention device P includes a base body 1, a unit body A configured by the arm 21 and the operation mechanism 3 supported by the base 1. For this reason, component management and attachment work can also be performed in the unit of the unit body A in which a plurality of components are incorporated, and the handling is excellent.

  The attachment of the fall prevention device P to the shelf board T1 is as follows.

  First, the above-described unit body A is placed on one side end portion of the shelf board T1 to be attached. Next, the bracket 13 is inserted from the lower surface side of the side edge portion of the shelf plate T1, and is fastened to the bracket support portion 111a of the base body 11 using the screw v1. At this time, the front end portion of the base 1 is brought into contact with the back surface T21a of the front column T21 of the shelf T. Subsequently, the base 1 accommodating the arm 21 is similarly attached to the other side end portion of the shelf board T1 (in addition, the unit body A accommodating the operating mechanism 3 inside may be mounted on the other side. Is as described above.) At this time, the fall prevention bar 22 is connected to the distal end portions 21a of the left and right arms 21, and both are closely attached using the screw v2.

  Subsequently, the operation of the fall prevention device P will be described with reference to FIGS. 5 and 6 in particular.

  Prior to the occurrence of the earthquake, the operating mechanism 3 is held at the set position (S) in a state where the whole is tilted forward. When an earthquake occurs and vibrations exceeding a certain level occur, the operating mechanism 3 swings around the axis j and cannot maintain the forward tilted posture, which is the posture at the set position (S), and eventually the whole tilts backward. Transition to the fall position (F). At this time, the pressing element 32 that has obtained the pressing force due to the gravity of the weight W via the link member 31 pushes the arm 21 of the fall prevention body 2 upward from below. As a result, the fall prevention body 2 transitions from the retracted position (D) to the fall prevention position (U) by receiving the gravity when the weight W falls as a main driving force.

  As described above, the fall prevention device P according to the present embodiment is provided on the shelf board T1 on which the stored item X is placed, and the base 1 attached to the shelf board T1 and the base 1 It is possible to prevent the stored item X placed on the shelf plate T1 from dropping from the shelf plate T1 from the retracted position (D) that does not hinder the loading and unloading of the stored item X supported and placed on the shelf plate T1. The fall prevention body 2 operable between the possible fall prevention position (U) and the fall position from the set position (S) when a vibration of a certain level or more is applied to the set position (S). (F) has a weight W for performing a drop operation, and the gravity when the weight W is dropped acts on the fall prevention body 2 to move the fall prevention body 2 from the retracted position (D) to the fall prevention position (U). And an actuating mechanism 3 that is actuated. For this reason, the fall prevention device P that can stably perform the operation for preventing the fall of the stored items X placed on the shelf plate T1 in response to a certain vibration, and the fall prevention device P The shelf T provided with can be provided. That is, the operating mechanism 3 has a weight W, and the fall prevention body 2 is operated by causing the gravity of the weight W to act on the fall prevention body 2, so that the lock as described in the conventional example is performed. A complicated configuration such as a mechanism or a lock release mechanism is not required, and an operation that operates from the retracted position (D) to the fall prevention position (U) when a constant vibration is applied can be stably realized. It will be a thing.

  The fall prevention body 2 is supported by the base 1 so as to be pivotable up and down, and has an arm 21 with a front end 21a extending forward from the shelf T1, and a rotation of the arm 21 attached to the front end 21a of the arm 21. Along with the movement, it moves up and down between a retracted position (D) set at a position lower than the upper surface of the shelf board T1 and a fall prevention position (U) set at a position higher than the upper face of the shelf board T1. A drop prevention bar 22 is provided. For this reason, it has become excellent in the freedom degree of the design for reducing the weight of the fall prevention body 2 while achieving the intended purpose.

  A pair of bases 1 are attached to the left and right sides of the shelf board T1, and the fall prevention body 2 includes a pair of arms 21 supported by the respective bases 1, and tip portions of both arms 21. And a fall prevention bar 22 installed between 21a. For this reason, it becomes the convenience of component manufacture and the operation | movement of the fall prevention body 2 can be implement | achieved stably.

  The operating mechanism 3 is held only by one base 1, and the tip end portion 21 a of each arm 21 supported by the both bases 1 and the fall prevention bar 22 are rigidly connected. For this reason, even if the operating mechanism 3 is held only on one base 1, the pressing force directly applied to one arm 21 by the operating mechanism 3 is applied to the other arm 21 via the fall prevention bar 22. Can be suitably transmitted.

  The base 1 is mounted on the shelf plate T21 with its front end abutting against the back surface T21a of the front column T21 in the shelf support structure T2 that supports the shelf plate T1. For this reason, when the stored item X moves on the shelf board T1 and hits the fall prevention bar 22 due to an earthquake, the load on the front side acting on the fall prevention bar 22 is finally blocked by the front end portion of the base 1. become. Therefore, the fall of the stored item X can be suitably prevented, and the attachment of the base 1 to the shelf board T1 can be realized in a relatively simple manner.

  The weight W is attached to an upper end portion of a link member 31 whose intermediate portion is supported by the base 1 so as to be pivotable in the front-rear direction. The ring member 31 has a center of gravity W1 of the weight W. A standby position (J) displaced in one direction from the rotation center 31a of the link member 31 and a fall prevention position (K) in which the center of gravity W1 of the weight W is displaced in the other direction from the rotation center 31a of the link member 31. And a pusher for pushing up the arm 21 at the lower end of the link member 31 in accordance with the pivoting operation from the standby position (J) to the fall prevention position (K). 32 is provided. For this reason, the suitable structure for pushing up the arm 21 using the gravity of the weight W can be implement | achieved.

  Since the shelf T is provided with the above-described fall prevention device P on the shelf plate T1, stable operation for preventing the fall of the stored item X in response to shaking such as an earthquake can be realized. It will be a thing.

  The present invention is not limited to the embodiment described in detail above.

  For example, as shown in FIGS. 7 and 8, in order to stably move the fall prevention body 2 from the retracted position (D) to the fall prevention position (U), the fall prevention body by the operating mechanism 3 using the spring B is used. You may make it assist the pushing-up force with respect to 2. FIG. In this embodiment, a spring mounting portion b1 is provided on the upper side of the front portion of the arm 21 for attaching one end of the spring B, and a spring mounting portion b2 for attaching the other end of the spring B to the side wall 113 of the base 1. Is provided. The spring B does not have an urging force that can lift the fall prevention body from the retracted position (D) to the fall prevention position (U) by itself. By doing in this way, the operation force to the fall prevention body 2 by the said operation mechanism 3 by the spring B is based on the premise that the main operation force to the fall prevention body 2 by the action mechanism 3 is the gravity of the weight W. This can be assisted by the urging force, and the fall prevention bar 22 can be stably raised while maintaining the horizontal posture. For example, even if the operation mechanism 3 is mounted only in one base 1, the spring B having the above-described configuration is provided in the other base 1 (without the operation mechanism 3). The arm 1 can be raised in the other base 1, and the fall prevention body 2 can be suitably moved up and down while maintaining the intended horizontal posture. 7 and 8, the configuration other than the spring B is the same as that of the above-described embodiment.

  The operation mechanism is not limited to the above-described embodiment, and various configurations can be considered. For example, what is shown in FIG.9 and FIG.10 is considered as an example. 9 and 10, the same or corresponding components as those of the above-described embodiment will be described with the same reference numerals, and detailed description thereof will be omitted.

  The fall prevention device P shown in FIGS. 9 and 10 is mainly composed of a weight W in which the operating mechanism 3 has a substantially circular shape in a side view. The operating mechanism 3 supports a weight W made of metal that can be rolled by vibration, and the weight W at the set position (S), and when a certain vibration occurs, the weight W falls by its own rolling. An allowable weight placement portion 113g is provided. The weight placing portion 113g protrudes from the side wall 113 of the base body 11, and in this embodiment, a drop suppressing portion 113h having a gradient at the rear end portion is provided. That is, this embodiment is a fall prevention device P provided on the shelf plate T1 for placing the stored item X, and the operation mechanism 3 is substantially circular in a side view and is placed on the weight placing portion 113g. Has a weight W placed so as to be able to roll. The weight W as the main body of the operating mechanism 3 rolls in the front-rear direction when a vibration of a certain magnitude or more is applied, and falls from the set position (S) located on the weight placement portion 113g. It overcomes the fall restraining force by the restraining part 113h and falls from the weight placing part 113g to perform the fall operation to the fall position (F). The arm 21 constituting the fall prevention body 2 is supported so that its central portion in the front-rear direction can rotate with respect to the base body 11 via an axis j. A weight receiving portion 214 that receives the weight W at the drop position (F) is disposed at a position behind the rotation center 31a of the arm 21. When the weight W reaches the drop position (F), the tip 21a of the arm 21 rises and the fall prevention bar 22 is located at the fall prevention position (U). Even if this is the case, the intended purpose can be achieved.

  A shelf is not restricted to what was shown by this embodiment, For example, the shelf of the type which has a door may be sufficient.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Fall prevention body 3 ... Actuation mechanism P ... Fall prevention device T ... Shelf T1 ... Shelf board W ... Weight X ... Storage thing

Claims (7)

A fall prevention device provided on a shelf board for placing stored items,
The base mounted on the shelf and the storage placed on the shelf fall from the shelf from a retracted position that is supported by the base and does not hinder the loading and unloading of the storage on the shelf. A fall prevention body that can operate between the fall prevention position where it can be prevented and a fall operation from the set position to the fall position when a certain level of vibration is applied to the set position. An anti-falling device comprising: an operating mechanism that has a weight for performing the above-described operation and causes the gravity when the weight is dropped to act on the anti-falling body to operate the anti-falling body from the retracted position to the anti-falling position. The fall prevention body is supported by the base so as to be pivotable up and down, and has an arm with a tip extending forward from the shelf, and is attached to the tip of the arm as the arm turns. 2. A fall prevention bar that moves up and down between a retracted position set at a position lower than the upper surface of the shelf board and a fall prevention position set at a position higher than the upper face of the shelf board. The fall prevention device of description. A pair of bases are attached to the left and right of the shelf board,
The fall prevention device according to claim 2, wherein the fall prevention body includes a pair of arms supported by the respective bases, and a fall prevention bar provided between the distal ends of both arms. 4. The fall prevention device according to claim 3, wherein the operating mechanism is held only by the one base, and a tip portion of each arm supported by the both bases and the fall prevention bar are rigidly connected. The fall prevention device according to claim 3 or 4, wherein the base is mounted on the shelf board with its front end abutting against the back surface of the front pillar in the shelf board support structure that supports the shelf board. . The weight is attached to the upper end of a link member that is supported by the base so as to be pivotable in the front-rear direction on the base.
The ring member includes a standby position in which the center of gravity of the weight is displaced in one direction from the rotation center of the link member, and a fall prevention position in which the center of gravity of the weight is displaced in the other direction from the rotation center of the link member. Between them,
The fall prevention device according to claim 2, 3, 4, or 5, wherein a pressing member for pushing up the arm is provided at a lower end portion of the link member in accordance with a rotation operation from the standby position to the fall prevention position.   The shelf which provides the fall prevention device of Claim 1, 2, 3, 4, 5 or 6 on a shelf board.

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