JP6360401B2 - Seismic-type article fall prevention device - Google Patents

Description

  The present invention relates to an anti-seismic article fall prevention device that can prevent an article such as a book placed on a shelf of an article storage shelf such as a book shelf from falling due to vibration such as an earthquake.

  As a conventional seismic-sensing article fall prevention device, for example, as disclosed in Patent Document 1, a horizontal member (a recumbent portion) that extends horizontally along a shelf front surface and a horizontal member are attached upward. An urging means for urging, an engagement support portion engaged and supported by friction against the urging means, and a seismic operation means such as a pendulum. When the seismic operation means senses vibration, The horizontal member, which has been disengaged from the engagement support portion by operating the operating means, is moved to a predetermined position where the article can be prevented from falling by the urging force of the urging means, and the article placed on the shelf is dropped. There is one that can be prevented (for example, see Patent Document 1).

Japanese Patent No. 2826811 (page 3, FIG. 5)

  The seismic-sensing article fall prevention device described in Patent Document 1 is an urging unit that disengages the engagement support portion that prevents the return of the shape of the winding spring as the urging unit during the seismic motion. The horizontal member is moved upward by the winding spring to prevent the article placed on the shelf from dropping.

  However, in such a seismic-sensing article fall prevention device, it is necessary to increase the spring force in order to realize a quick and reliable movement of the horizontal member to a predetermined position in response to a shake such as an earthquake, and therefore the engagement There is a possibility that the engagement force (drag) of the support portion increases and the engagement of the engagement support portion cannot be released. In order to reliably release the frictional engagement force that generates such a strong drag force, the pendulum that is the seismic operation means may be made heavy, but in this case, the seismic operation means is increased in size.

  The present invention has been made paying attention to such problems, and can apply a high moving force to the stopper member and can operate quickly and reliably with high sensitivity to shaking such as an earthquake. The object is to provide a seismic-type article fall prevention device.

In order to solve the above problems, the seismic-type article fall prevention device of the present invention is
A stopper member provided so as to be able to move up and down between at least a lower position in the vertical direction of the shelf that does not affect the loading and unloading of the article on the shelf and an upper position that can prevent the article from falling on the shelf; and the stopper member Urging means for urging the upper side to the upper position side, seismic operation means for activating in response to shaking, and restricting the moving force of the stopper member to the upper position, and releasing the restriction And a regulating section to
The restricting portion restricts the moving force vector applied to the stopper member by the urging means in a fixed manner and applies the moving force vector applied to the stopper member from different directions. It is characterized in that it is bent or refracted by the force of the seismic operation means.
According to this feature, the restriction portion is bent or refracted by the force of the seismic sensing means applied from different directions with respect to the moving force vector applied to the stopper member by the biasing means, so that the restriction portion becomes the stopper member. Since the vector of the moving force given to is divided in different directions, the restriction of the moving force of the stopper member is reliably released with high sensitivity, and the biasing means for applying a high biasing force is used. The stopper member can be quickly moved to the upper position.

The restricting portion is characterized in that one end side is supported on the upper position side and the other end side is formed by a winding spring disposed so as to receive the moving force of the stopper member.
According to this feature, since the winding spring has a cylindrical shape, the moving force to the upper position of the stopper member received on the other end side of the winding spring can be stably supported with a wide cylinder cross section, and The force applied from different directions to the vector is easy to bend, and the restriction of the movement force of the stopper member by the force of the seismic operation means can be easily released. Further, when a winding spring having a restoring force is used in a bent state, an operation at the time of resetting is facilitated.

The winding spring is characterized in that the moving force applied to the stopper member is fixedly regulated in a state where the wires constituting the winding spring are in contact with each other in the vertical direction.
According to this feature, since the wire rods of the winding springs, which are compression coil springs or tension coil springs, are in contact with each other in the vertical direction, the moving force to the upper position of the stopper member received on the other end side of the winding springs can be stabilized. Can be regulated.

The stopper member is pivotally supported by a pivot so as to rotate in the vertical direction on the front side of the shelf, and the winding spring is located at a position where the other end is substantially horizontal to the pivot. And the movement force in the stopper member is fixedly regulated in a state of being arranged substantially vertically.
According to this feature, in the state in which the moving force of the stopper member is regulated, the other end side of the winding spring is connected to the stopper member at a position substantially horizontal to the pivot, so that the moving force vector of the stopper member is substantially vertical. Therefore, even if a moving force is applied to the stopper member by an external force other than the force of the seismic actuation means, the displacement of the position of the other end of the winding spring in the front-rear direction is reduced, and the moving force of the stopper member is reduced. It is stably regulated by the substantially vertical winding spring. Therefore, it is possible to prevent the restriction of the moving force of the stopper member from being erroneously released due to slight shaking.

The winding spring is a tension spring, and is bent so as to protrude toward the rear of the shelf by the force of the vibration-sensing operation means.
According to this feature, the winding spring is bent so as to protrude toward the rear of the shelf, and the tensile force acts to urge the stopper member to rotate, so that the stopper member can be reliably rotated. To be carried out.

The biasing means is a spring.
According to this feature, the vector of the moving force of the stopper member can be selectively set so as to be optimal with respect to the restricting portion, and the biasing force applied to the stopper member can be easily adjusted.

It is a front view of an article | item storage shelf provided with the seismic-type article | item fall prevention apparatus in an Example. It is a perspective view of a seismic-type article fall prevention device. It is a fracture | rupture expansion side view which shows the operation standby state of a seismic-type article | item fall prevention apparatus. It is an enlarged front view which shows the operation standby state of a seismic-type article | item fall prevention apparatus. (A) is a fracture | rupture expansion side view which shows a mode that the seismic operation means contact | abutted to the control part, (b) is a fracture | rupture expansion side surface which shows the state which the recumbent part started the rotation to a predetermined position. FIG. It is a fracture | rupture expansion side view which shows the state which the recumbent part completed the rotation to a predetermined position. It is a figure which returns a seismic-type article fall prevention apparatus to an operation standby state, (a) is a figure which shows the state which pushed up the recumbent part upwards, (b) is the operation standby state which released the recumbent part. It is a figure which shows the state which returned to.

  EMBODIMENT OF THE INVENTION The form for implementing the seismic-type article | item fall prevention apparatus which concerns on this invention is demonstrated below based on an Example.

  The seismic-sensing article fall prevention device according to the embodiment will be described with reference to FIGS. An article storage shelf 2 equipped with the seismic-type article fall prevention device (hereinafter referred to as a fall prevention device) 1 shown in FIG. 1 includes side plates 3 and 3 that are separated in the left-right direction, and side plates 3 and 3. The top plates 4 and 4 connecting the opposing surfaces of the upper end portions, and the upper and lower shelves 5 supported on the side surfaces of the side plates 3 and 3 facing each other. A plurality of books 15 are placed on the upper surface of the shelf board 5.

  A plurality of locking holes 3 a, 3 a,... Are formed on the front surface of each side plate 3. Each shelf plate 5 is fixed to a bracket (not shown) having a hook at the rear end, and the side plates 3, 3, 3 are engaged by engaging the hooks of the bracket with the locking holes 3 a, 3 a,. 3 is supported in a cantilevered state. Moreover, the support bodies 7 and 7 which constitute a part of the fall prevention device 1 described later are attached to both ends of the upper surface of the shelf board 5 of each stage. In the present embodiment, the support bodies 7 and 7 are described as being fixed to the upper surface of the shelf plate 5 of each stage by a bolt (not shown). For example, a hook is formed at the rear end of the support bodies 7 and 7. However, the hooks may be attached to the engaging holes 3a, 3a,. Furthermore, in the present embodiment, the fall prevention device 1 will be described as being attached to a bookcase, but is not limited thereto, and may be used by being attached to, for example, a furniture for displaying commodities. Hereinafter, the description will be made with respect to the front view of the article storage shelf 2 as a vertical direction, a horizontal direction, and a longitudinal direction.

  As shown in FIGS. 2 and 3, the fall prevention device 1 includes a pair of left and right supports 7, 7 having a substantially rectangular shape in side view, a stopper member 6, and tension coil springs 10, 10 as urging means. The stopper member 6 includes a pair of left and right arm portions 8 and 8 projecting from the inside of both supports 7 and 7 and front end portions of both arm portions 8 and 8 made of a metal plate or the like. And a horizontal flange 9 made of a metal pipe or the like having left and right ends fixed to the opposite surface.

  Each of the left and right supports 7 includes a flat plate-like outer plate 7A and an inner plate 7B opposed to each other with substantially the same size, and the inner plate 7B has a plurality of boss shafts 12 protruding toward the outer plate 7A. , 12,... Is a female screw hole (not shown) provided with a plurality of countersunk screws 13, 13,... In each boss shaft 12 from the outside of the outer plate 7A. 7A), the outer plate 7A and the inner plate 7B are connected to each other. Between the opposing surfaces of the outer plate 7A and the inner plate 7B, each boss shaft 12 functions as a spacer to form a required space.

  As shown in FIG. 3, various members for raising and lowering the recumbent flange 9 are incorporated in the supports 7 and 7. In the following description, the structure of the support 7 on the lower right side of the front view screen in FIG. 2 will be described, and the description of the other support 7 will be omitted.

  As shown in FIGS. 3 and 4, the arm portion 8 described above is disposed slightly below the center in the vertical direction of the support body 7, and the lower portion on the rear end side of the arm portion 8 is fixed to the inner plate 7 </ b> B. The shaft 16 is inserted into and supported by a pivot 16. As a result, the arm portion 8 can be turned up and down with the pivot 16 as a fulcrum, and the recumbent portion 9 can be moved up and down in front of the shelf board 5 as the arm portion 8 turns. It has become.

  Further, the tension coil spring 10 has a hook at one end rotatably engaged with a through hole 17 provided above the pivot 16 in the arm portion 8, and the hook at the other end is an inner plate of the support 7. 7B is locked to a fixing pin hole 18 provided on the rear end side in the front-rear direction with respect to the pivot 16. A rotational torque acts on the arm portion 8 by the elastic restoring force of the tension coil spring 10, and a moving force acts on the lateral flange portion 9 so as to always move to the upper position.

  A substantially L-shaped bent piece 14 is fixed to the inner side plate 7B above the pivot 16 that pivotally supports the arm portion 8, and the bent plate 14 and the arm portion 8 at the substantially center of the outer plate 7A side. A winding spring 20 as a restricting portion is disposed so as to extend over a substantially L-shaped arm portion bending piece 19 provided on the arm portion. The upper end of the winding spring 20 is fixed to the approximate center of the lower surface 14 a of the bent piece 14 with a bolt 22, and the lower end is fixed to the approximate center of the upper surface 19 a of the arm part bent piece 19 with a bolt 22. In addition, the winding spring 20 of a present Example is comprised by the tension | pulling coil spring which force acts on a tension | pulling direction.

  As shown in FIGS. 3 and 4, when the horizontal flange 9 of the stopper member 6 is disposed at a lower position that does not affect the loading and unloading of the books 15 on the shelf 5, When the rotational torque is applied to the winding spring 20, the moving force to the upper position of the horizontal flange 9 is restricted. The lower position refers to an arbitrary lower position (one point) in a region where the stopper member 6 does not substantially hinder the loading and unloading of the books 15 on the shelf board 5, and the upper position refers to the stopper member 6. Indicates an arbitrary upper position (one point) in a region where the book 15 on the shelf board 5 can be prevented from dropping.

  Specifically, the arm portion bending piece 19 of the arm portion 8 serves as an action point of the moving force of the stopper member 6 to the upper position of the stopper member 6 with respect to the winding spring 20. The piece 19) is disposed at a position that is substantially horizontal to the pivot 16 in a state in which the recumbent portion 9 is disposed at the lower position. According to this, the action point (arm portion bending piece 19) of the moving force of the stopper member 6 is a portion that moves in a substantially vertical direction in the rotation trajectory. Further, at this time, the lower surface 14a of the bent piece 14 and the upper surface 19a of the arm portion bent piece 19 overlap in the vertical direction so as to be substantially parallel, and the winding spring 20 is disposed in a substantially vertical state. As a result, the winding spring 20 is compressed in the axial direction and receives a force acting in the axial direction, and the moving force (vector X of the moving force) to the upper position of the stopper member 6 is substantially vertical. It will be applied to the bending piece 14 substantially perpendicularly via. For this reason, the winding spring 20 regulates the moving force of the stopper member 6 to the upper position in a well-balanced manner in a state where it is fixedly disposed between the bent piece 14 and the arm portion bent piece 19 while maintaining a substantially vertical state. doing. In FIG. 3 and the like, in order to facilitate understanding of the spring, the upper and lower wire rods of the winding spring 20 are shown to have a gap. However, in the actually compressed state, the upper and lower wire rods are connected to each other. In contact.

  Further, since the wire rods forming the winding spring 20 are in a natural state and in a state where they are arranged at the lower position, they are in contact with each other in the vertical direction to form a cylindrical shape without a gap. The moving force (moving force vector X) to the upper position of the stopper member 6 received on the side of the piece 19 can be stably regulated with a wide cylinder cross section.

  In addition, a pendulum member 30 that is a seismic operation means is pivotally supported on the front side of the winding spring 20 by an oscillation shaft 33 with respect to the inner plate 7B. The pendulum member 30 is a plate-like body composed of a rod-like body 31 and a weight 32 fixed to the lower end thereof. The weight 32 is moved in the front-rear direction Y with the swing shaft 33 at the upper part of the rod-like body 31 as a fulcrum. In addition to being able to swing, it normally hangs down under its own weight. Further, the pendulum member 30 faces substantially the same front-rear direction as the winding spring 20 fixed by the arm part bending piece 19, and the arm part 8 and the pendulum member 30 are displaced in the left-right direction. For this reason, the rotation of the arm portion 8 does not interfere with the pendulum member 30 when the horizontal flange portion 9 of the stopper member 6 is moved to the upper position side.

  Next, the operation and usage of the fall prevention device 1 of the above embodiment will be described with reference to FIGS. As shown in FIG. 5, when an earthquake or the like occurs and the article storage shelf 2 vibrates in the front-rear direction, the weight 32 is swung in the front-rear direction Y, and the weight 32 collides with the front of the winding spring 20. It becomes like this. Due to the collision of the weight 32, a part of the winding spring 20 is bent and deformed, the vector X of the moving force applied to the stopper member 6 is divided in different directions, and the movement force of the stopper member 6 by the winding spring 20 is restricted. Canceled.

  As shown in FIG. 6, the stopper member 6 released from the restriction by the winding spring 20 rotates around the pivot 16 by the urging force of the tension coil spring 10, and accordingly, the horizontal flange portion 9 of the stopper member 6. Is moved upward to the upper position. As described above, the horizontal flange portion 9 of the stopper member 6 is disposed at the upper position, so that the books 15 on the shelf board 5 are prevented from falling.

  As described above, the fall prevention device 1 is configured such that the winding spring 20 is stopped by the collision of the pendulum member 30 applied from different front and rear directions Y with respect to the vector X of the upward movement force applied to the stopper member 6. Since the moving force vector X applied to 6 is divided in different directions, the restriction of the moving force of the stopper member 6 can be reliably released with high sensitivity. In this way, the winding spring 20 has a high spring force because the restriction of the moving force of the stopper member 6 is released by the collision force of the pendulum member 30 regardless of the spring force (biasing force) of the tension coil spring 10. Using the tension coil spring 10, the recumbent portion 9 can be quickly moved to the upper position.

  The matter of regardless of the spring force (biasing force) of the tension coil spring 10 will be described more precisely. By replacing the tension coil spring 10 with a high tension member and quickly moving the stopper member 6, the compression force acting on the winding spring 20 increases in proportion to the tension of the tension coil spring 10. Thus, since the vector X of the moving force acting on the winding spring 20 is divided in different longitudinal directions Y, the increment of the force required for this division is the increment of the compressive force acting on the winding spring 20. This is a very small ratio. Therefore, it means that the restriction of the moving force of the stopper member 6 can be released without being substantially affected by the spring force of the tension coil spring 10.

  Further, the winding spring 20 is made of a wire and is easily bent with respect to the collision force of the pendulum member 30 applied from different front and rear directions Y with respect to the moving force vector X of the stopper member 6. Even if it is thin and small, a high fall prevention effect can be expected.

  In addition, the winding spring 20 is in a state where it receives the rotational torque of the arm portion 8, that is, in a state where the wire material forming the winding spring 20 is spirally stacked, and the stopper member 6 by the urging force of the tension coil spring 10. Since the moving force (vector X of the moving force) is transmitted and regulated to each of the bent pieces 14 through each winding of the wire, the stopper member can be used without using the winding spring 20 formed of a thick wire. 6 moving force (moving force vector X) can be stably supported. Therefore, the restriction of the moving force of the stopper member 6 can be released with higher sensitivity by using the winding spring 20 formed of a wire with a small diameter, and the manufacturing cost of the winding spring 20 can be reduced. .

  Further, as described above, in the state where the moving force of the stopper member 6 is restricted, the vector X of the moving force of the stopper member 6 acts in a substantially vertical direction, so that the external force other than the collision force of the pendulum member 30 Even if the stopper member 6 moves upward due to (minor vibrations, etc.), the displacement in the front-rear direction of the position of the movement force (arm portion bending piece 19) of the stopper member 6 is small. Therefore, the substantially vertical arrangement state of the winding spring 20 is maintained, and it can be prevented that the restriction of the moving force of the stopper member 6 is erroneously released.

  Further, since the urging force applied to the stopper member 6 can be changed by changing the attachment position and the attachment angle of the tension coil spring 10 with respect to the stopper member 6, the vector X of the moving force of the stopper member 6 is the winding spring 20. It can be set appropriately and selectively so as to be optimal with respect to the bending strength. The urging force of the tension coil spring 10 and the bending strength of the winding spring 20 may be adjusted to each other so as to be in an optimum state for regulating and releasing the moving force of the stopper member 6.

  As shown in FIG. 6, the upper boss shaft 12 of the support body 7 abuts on the arm portion 8 that rotates upward, so that the recumbent portion 9 is higher than the lower end of the book 15. It can be reliably stabilized at the height, and can maintain a state in which the book 15 is prevented from jumping forward due to shaking such as an earthquake. That is, the boss shaft 12 functions as a position adjusting means for adjusting a predetermined position (height or the like) after the operation of the horizontal flange 9. The position adjusting means is not limited to the boss shaft 12 and may be a screw that can be attached to and detached from the support 7.

  Further, as shown in FIGS. 5B and 6, when the weight 32 collides with the front side of the winding spring 20, the bent portion of the winding spring 20 protrudes toward the rear side. Furthermore, since the upper surface 19a of the arm bending piece 19 moves backward while inclining backward as the recumbent flange 9 approaches the upper position, it acts to push the lower part of the winding spring 20 backward. become. Further, as shown in FIG. 3, the winding spring 20 is used that is slightly compressed from the natural length in the compressed state (operation standby state). As a result, the tensile force of the winding spring 20 constituted by the tension coil spring acts to urge the arm portion 8 in the rotational direction, so that the stopper member 6 is reliably and quickly rotated.

  Next, the case where the stopper member 6 is returned to the operation standby state will be described with reference to FIG. As shown in FIGS. 7 (a) and 7 (b), the administrator of the fall prevention device 1 temporarily lowers the recumbent rib portion 9 in the state of being raised upward after operation to a predetermined position where the winding spring 20 extends. Press down and release your hand. The winding spring 20 once stretches and then returns to a natural linear shape by its own restoring force, so that the moving force of the stopper member 6 toward the upper position side is applied to the lower surface 14 a of the bending piece 14 via the winding spring 20. become. When the winding spring 20 returns to its natural state after being stretched, the action point of the moving force of the stopper member 6 (the arm part bending piece 19) and the bending piece lower surface 14a are relatively attracted by returning to its own shape. An operating standby state in which the operating point of the moving force of the stopper member 6 and the bolt 22 on the lower surface 14a of the bent piece are guided so as to be positioned on the same vertical line, and the moving force is stably regulated. Can be restored.

  Further, in the standby state of the stopper member 6, even if an external force different from the urging force of the tension coil spring 10 that rotates the stopper member 6 is applied, the operating point of the moving force of the stopper member 6 (arm Since the reaction force from the bent piece 14 applied to the bent portion 19) is buffered by the winding spring 20, the arm bent portion 19 can be prevented from being damaged.

  In addition, as shown in FIG. 3, in the standby state, the weight 32 of the pendulum member 30 is disposed so as to be slightly separated from the winding spring 20 in the front-rear direction, so that an article such as the book 15 does not fall. It is possible to prevent malfunction of the fall prevention device 1 due to shaking or impact.

  In this embodiment, the winding spring 20 is arranged in a substantially vertical state and restricts the moving force of the stopper member 6. However, if the moving force of the stopper member 6 can be restricted, it is arranged in an inclined state. Also good. The winding spring 20 is not limited to a tension coil spring formed by winding a wire rod in a circular shape, and may be formed by winding a wire rod into a square shape such as a triangle, a square, or a compression coil spring. May be.

  The restricting portion for restricting the moving force of the stopper member 6 restricts the moving force of the stopper member 6 in a fixed manner with respect to the moving force vector X applied to the stopper member 6, and the moving force vector. The structure is not limited to the above-described winding spring 20 as long as the moving force vector X is divided in different directions by forces applied to X from different longitudinal directions Y. For example, the upper plate whose upper end is pivotally supported with respect to the inner plate 7B and the lower plate whose lower end is pivotally supported with respect to the arm portion 8 are relative to each other by the shaft core. In addition to restricting the moving force of the stopper member 6 using a link device that is pivotably connected, the moving force of the stopper member 6 is regulated by the link device being refracted by the collision force of the pendulum member 30. You may come to cancel. Furthermore, this link device is not limited to the structure in which the upper and lower plate bodies rotate relatively around the axis, but the axis is omitted, and the upper and lower plates are completely reciprocally refracted during the earthquake. A configuration may be adopted in which the vector X of the upward moving force applied to the stopper member 6 is divided in different directions so as to be separated from each other. Furthermore, the restricting portion is not limited to a winding spring or a link device, and an elastic body such as rubber may be used.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the pendulum member 30 having the weight 32 is used as the seismic operation means, but the seismic function and the function of dividing the vector X of the moving force applied to the stopper member 6 are provided. If it is a structure, the structure is not limited to the pendulum member. For example, a rail may be provided at the bottom of the support 7 and the weight may horizontally move on the rail to collide with the regulating portion. Then, the moving force vector X applied to the stopper member 6 in the restricting portion may be divided by using a piston that operates by vibration sensing. The structure for dividing the moving force of the stopper member 6 is not limited to pushing the winding spring 20, and the seismic operation means is constituted by a hook or the like and the winding spring 20 is pulled to divide the moving force of the stopper member 6. May be.

  Further, although the pendulum member 30 swings back and forth and collides with the front of the winding spring 20 has been described, for example, the pendulum member is pivotally supported so as to swing left and right and collides with the side of the winding spring 20. Alternatively, the pendulum member 30 that swings back and forth and the pendulum member that swings left and right may be used together so as to be able to cope with shaking from multiple directions such as an earthquake. The pendulum member 30 may be disposed on the rear side of the winding spring 20 so as to collide with the rear surface of the winding spring 20.

  Further, the stopper member 6 of the above-described embodiment is configured such that the arm portion 8 moves up and down as the arm portion 8 rotates about the pivot 16, but the present invention is not limited to this. Alternatively, for example, a plate-like stopper member may be moved up and down by a biasing force of a tension spring along a guide groove communicating in the vertical direction. In such a case, the vector of the moving force of the stopper member can be selectively set so as to be optimal with respect to the bending or refractive strength of the restricting portion by changing the arrangement and type of the tension spring as the biasing means. The biasing force applied to the stopper member can be easily adjusted.

  Further, the tension coil spring 10 is used as the biasing means for biasing the stopper member 6 to the upper position side. However, the tension coil spring 10 is not limited thereto. For example, an elastic body such as rubber or a spring provided so as to push upward may be used, or a weight provided so as to lower the rear end side of the pivot 8 in the arm portion 8 may be used. .

1 Seismic-type article fall prevention device 2 Article storage shelf 5 Shelf (shelf)
6 Stopper member 7 Support body 7A Outer plate 7B Inner plate 8 Arm portion 9 Horizontal flange portion 12 Boss shaft (position adjusting means)
14 Bending piece 14a Bending piece lower surface 15 Book (article)
16 Axis 19 Arm part bending piece 19a Arm part bending piece upper surface 20 Winding spring (regulation part)
30 Pendulum member (Seismic operation means)
31 Rod body 32 Weight 33 Oscillating axis X Vector Y of the moving force of the stopper member

Claims (6)

A stopper member provided so as to be able to move up and down between at least a lower position in the vertical direction of the shelf that does not affect the loading and unloading of the article on the shelf and an upper position that can prevent the article from falling on the shelf; and the stopper member The biasing means that biases the upper side to the upper position side, the seismic motion actuating means that operates in response to the shaking of the shelf, and the movement force of the stopper member to the upper position are restricted, and the restriction is released. A regulation part that enables,
The restricting portion restricts the moving force vector applied to the stopper member by the urging means in a fixed manner and applies the moving force vector applied to the stopper member from different directions. An anti-seismic article fall prevention device characterized in that it is bent or refracted by the force of the anti-seismic actuating means.   2. The seismic article dropping device according to claim 1, wherein the restricting portion includes a winding spring arranged so that one end side is supported on an upper position side and the other end side receives a moving force of the stopper member. Prevention device.   The said winding spring restrict | limits the moving force given to the said stopper member in the state which the wire materials which comprise this winding spring contact | abutted in the up-down direction fixedly. Seismic-type article fall prevention device.   The stopper member is pivotally supported by a pivot so as to rotate in the vertical direction on the front side of the shelf, and the winding spring is located at a position where the other end is substantially horizontal to the pivot. 4. The seismic-sensing article fall prevention device according to claim 2, wherein the movement force in the stopper member is fixedly regulated in a state where the stopper member is arranged substantially vertically.   The seismic-sensing article fall prevention device according to any one of claims 2 to 4, wherein the winding spring is a tension spring and is bent so as to protrude toward the rear of the shelf.   6. The seismic article fall prevention device according to claim 1, wherein the urging means is a spring.

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