JP7348462B2 - Vibration-sensing article fall prevention device - Google Patents

Description

The present invention relates to a vibration-sensing article fall prevention device that prevents articles placed on a shelf from falling due to vibration, and more specifically, the present invention relates to a vibration-sensing article fall prevention device that prevents articles placed on a shelf from falling due to vibrations, and more specifically, a device that is suitable for a cabinet equipped with a door body that opens and closes a front opening. Regarding a seismic type article fall prevention device.

In bookshelves and the like, there is a seismic type article fall prevention device that prevents articles from falling due to vibrations such as an earthquake without interfering with displaying or putting in and taking out articles on the shelves (for example, see Patent Documents 1 to 3).

In the shock-sensing article fall prevention device of Patent Document 1, a horizontal bar 15 is supported by a pair of left and right boxes 11 and 12 arranged at the left and right ends of the storage space on the shelf board 6, and in normal times, the horizontal bar 15 is The bar 15 is in a standby state in a lower position. When there is an earthquake and the bookshelf 2 is vibrated in the front-back direction, the pendulum 35, which is an earthquake-sensing means, swings back-and-forth, thereby bringing the horizontal bar 15 into an operating state in which it is moved upward. In the operating state, the horizontal bar 15 is located in front of the articles on the shelf board 6, thereby preventing the articles from falling.

In the shock-sensing type article fall prevention device of Patent Document 2, a horizontal bar 20 is supported by a pair of left and right boxes 11 and 12 arranged at the left and right ends of the storage space on the shelf board 5, and in normal times, the horizontal bar 20 is The bar 20 is in a standby state in the upper position. When there is an earthquake and the bookshelf 1 is vibrated in the front-back direction, the pendulum 30, which is an earthquake-sensing means, swings back and forth, thereby causing the horizontal bar 20 to move downward. In the operating state, the horizontal bar 20 is located in front of the articles on the shelf board 5, so that the articles can be prevented from falling.

In the shock-sensing type article fall prevention device of Patent Document 3, a base plate 7a is attached to the front surface of a shelf board 5 with bolts or the like, and a support part 7 is held on the front side of the shelf board 5. During normal times, the stopper part 9 is held in place. It is stored in the support part 7 and enters a standby state. When there is an earthquake and the article storage shelf 2 is vibrated in the front-back direction, and the vibration is transmitted to the weight part 10, the weight part 10 collapses forward about the rotation axis 8, and the rotation associated with this movement occurs. The rotation of the shaft 8 causes the stopper portion 9 to be pushed upward. In the operating state, the stopper portion 9 is located in front of the articles on the shelf board 5, so that the articles can be prevented from falling.

Patent No. 2826811 Japanese Patent Application Publication No. 9-173170 Japanese Patent Application Publication No. 2014-68997

In the shock-sensing article drop prevention devices of Patent Documents 1 and 2, the horizontal bar swings around a support shaft in the left-right direction between the standby state and the operating state, and follows an arc-shaped trajectory that expands forward. Go up and down. In the operating state, the horizontal bar is located forward of the front end of the shelf so as not to interfere with the articles placed on the shelf.
Therefore, when these seismic type article fall prevention devices are used in a cabinet equipped with a door body that opens and closes an opening on the front surface, it is necessary to provide a large clearance between the door body and the front surface of the shelf board. In other words, in order to provide a shock-sensitive article drop prevention device to a cabinet equipped with the door body, it is necessary to shorten the front and rear dimensions of the shelf board, resulting in a smaller storage space.

In the shock-sensing article fall prevention device disclosed in Patent Document 3, the stopper section moves in the vertical direction between the standby state and the operating state. In the operating state, the stopper portion is located forward of the front end of the shelf so as not to interfere with the articles placed on the shelf, and the device is mounted on the front of the shelf. use.
Therefore, when this vibration-sensing article fall prevention device is used in a cabinet equipped with a door that opens and closes the front opening, it is necessary to provide a large clearance between the door and the front surface of the shelf board. In other words, in order to provide a shock-sensitive article drop prevention device to a cabinet equipped with the door body, it is necessary to shorten the front and rear dimensions of the shelf board, resulting in a smaller storage space.
Furthermore, since the shock-sensing type article fall prevention device of Patent Document 3 is used while being attached to the front of a shelf board, the entire device protruding forward from the bookshelf, etc. in use is visible, so This will damage the design quality of the product.

Therefore, when the present invention is used in a cabinet equipped with a door body that opens and closes a front opening, there is no need to provide a large clearance between the door body and the front surface of a shelf board, and even if the clearance is narrowed, It is an object of the present invention to obtain a vibration-sensing type article fall prevention device suitable for a cabinet equipped with the door body, which operates stably and reliably and can effectively utilize storage space.

The gist of the invention is as follows.

[1] A seismic article fall prevention device that is attached to the cabinet through a plurality of shelf claw holes formed at predetermined intervals in the vertical direction in the cabinet and prevents articles placed on the shelf from falling due to vibrations. And,
a pair of left and right main bodies disposed at the left and right ends of the storage space on the shelf;
a rocking body having a horizontal member extending in the left and right direction between the left and right body parts, a base end of which is supported by a left and right support shaft provided in the body part, and swinging in the vertical direction;
comprising a vibration sensing means provided in the main body that senses vibrations and serves as a trigger for the rocking body, which is stationary in a standby state, to start rocking;
The rocking body includes a front member including the horizontal member and a rear member including the base end,
The front member is supported so as to be slidable in a substantially radial direction around the left-right support shaft with respect to the rear member, and when the rocking body swings in the vertical direction, the horizontal member moves on the shelf board. guide means for guiding the front member to move vertically on a predetermined trajectory that does not interfere with the article and surrounding members;
In normal times, the rocking body is stationary and the horizontal member is in the standby state located at an upper end or a lower end in front of the storage space,
When a vibration occurs and the vibration sensing means senses a vibration of a predetermined magnitude or more, the vibration sensing means starts rocking the rocking body so that the front member is not guided by the guide means. , the horizontal member moves in the vertical direction, and the horizontal member moves to a vertical intermediate position in front of the storage space and enters a stationary operating state;
The main body portion is provided with a fixing metal fitting having a claw that is selectively inserted into any one of the plurality of shelf nail holes, and is attached to the cabinet via the fixing metal fitting .
Seismic type article fall prevention device.

[2] The guide means:
a vertical guide groove formed in the substrate of the main body;
a roller attached to the front member that moves up and down along the guide groove;
A plurality of positions of the center of the roller corresponding to the plurality of points are determined from a plurality of points on the trajectory along which the horizontal member moves in the vertical direction, and the plurality of positions are determined by performing spline interpolation on the plurality of positions. determining a spline curve to pass through, and determining a curve of the guide groove from the spline curve;
The seismic type article fall prevention device according to [1] above.

[3] A seismic type article fall prevention device that prevents articles placed on a shelf from falling due to vibrations,
a pair of left and right main bodies disposed at the left and right ends of the storage space on the shelf;
a rocking body having a horizontal member extending in the left and right direction between the left and right body parts, a base end of which is supported by a left and right support shaft provided in the body part, and swinging in the vertical direction;
a vibration sensing means provided in the main body that senses vibrations and triggers the rocking body, which is stationary in a standby state, to start rocking;
Equipped with
The rocking body includes a front member including the horizontal member and a rear member including the base end,
The front member is supported so as to be slidable in a substantially radial direction around the left-right support shaft with respect to the rear member, and when the rocking body swings in the vertical direction, the horizontal member moves on the shelf board. guide means for guiding the front member to move vertically on a predetermined trajectory that does not interfere with the article and surrounding members;
In normal times, the rocking body is stationary and the horizontal member is in the standby state located at an upper end or a lower end in front of the storage space,
When a vibration occurs and the vibration sensing means senses a vibration of a predetermined magnitude or more, the vibration sensing means starts rocking the rocking body so that the front member is not guided by the guide means. , the horizontal member moves in the vertical direction, and the horizontal member moves to a vertical intermediate position in front of the storage space and enters a stationary operating state;
The guide means includes a vertical guide groove formed on the substrate of the main body, and a roller attached to the front member that moves up and down along the guide groove,
A plurality of positions of the center of the roller corresponding to the plurality of points are determined from a plurality of points on the trajectory along which the horizontal member moves in the vertical direction, and the plurality of positions are determined by performing spline interpolation on the plurality of positions. determining a spline curve to pass through, determining a curve of the guide groove from the spline curve;
The horizontal support shaft of the rocking body, the center of the roller, and the center of the horizontal member are located on the same plane ;
Seismic type article fall prevention device.

[ 4 ] In the standby state,
The horizontal member is located at the front upper end of the storage space,
In said operating state,
The rocking body rocks downward under its own weight.
The seismic article fall prevention device according to any one of [1] to [ 3 ] above.

The vibration-sensing type article fall prevention device according to the present invention includes a horizontal member and a rocking body that swings around a horizontal support shaft, which is divided into a front side member and a rear side member, and a front side member is divided into a front side member and a rear side member. A front member is configured to slidably support the oscillator and move vertically on a predetermined trajectory that does not interfere with the items on the shelf or surrounding members when the rocking body swings vertically. Equipped with a guide means for guiding.

As a result, the horizontal member that moves vertically between the standby state and the operating state does not move along an arc-shaped trajectory that expands forward, but instead moves directly in the vertical direction, and the operating space is narrow in the depth direction. A sufficient amount of movement of the horizontal member can be ensured.
Therefore, when the vibration-sensing article fall prevention device according to the present invention is used in a cabinet equipped with a door body that opens and closes the front opening, it is necessary to provide a large clearance between the door body and the front surface of the shelf board. Therefore, even if the clearance is narrowed, the device operates stably and reliably, so that the storage space of the cabinet provided with the door body can be utilized to the maximum extent possible.

FIG. 2 is a perspective view of the seismic article fall prevention device according to Embodiment 1 of the present invention, showing a standby state in which the horizontal member is stationary at the upper end of the storage space. FIG. 3 is a perspective view of the same, showing a state in which the horizontal member is lowered when a vibration occurs. FIG. 3 is a perspective view of the same, showing an operating state in which the horizontal member moves downward and remains stationary. FIG. 2 is a partially exploded perspective view of the seismic article fall prevention device. FIG. 2 is an exploded perspective view mainly showing the left main body of the seismic article drop prevention device and the parts housed therein. FIG. 3 is a cross-sectional plan view around the rocking body. FIG. 3 is a vertical cross-sectional front view of the area around the vibration sensing means. FIG. 2 is a perspective view of a cabinet equipped with a door that opens and closes a front opening. It is a perspective view showing a state in which the above-mentioned shock-sensing type article fall prevention device is attached to the same cabinet, with the door body being transparent, and showing the above-mentioned standby state. It is a perspective view of the same, and shows the said operating state. FIG. 2 is an enlarged perspective view of a main part showing an example of an attachment structure of the seismic article fall prevention device to the cabinet body. FIG. 2 is an enlarged perspective view of a main part showing a state in which the shock-sensing type article fall prevention device is attached to a cabinet main body, with a transparent cover body. It is an enlarged view of the main parts seen from the right side, showing the left main body part, its internal parts, horizontal members, etc., in a state where the seismic article fall prevention device is attached to the cabinet main body, and the main part is in the standby state. It shows. This is an enlarged view of the same main part, showing a state in which the horizontal member is lowered when an earthquake occurs. It is an enlarged view of the same main part, showing the operating state. FIG. 3 is an explanatory diagram showing a method for determining the curved shape of a guide groove. FIG. 3 is a perspective view of the seismic article drop prevention device according to Embodiment 2 of the present invention, showing a standby state in which the horizontal member is stationary at the upper end of the storage space. It is an enlarged view of the main parts seen from the right side, showing the left main body part, its internal parts, horizontal members, etc., in a state where the seismic article fall prevention device is attached to the cabinet main body, and the main part is in the standby state. It shows. This is an enlarged view of the same main part, showing a state in which the horizontal member is lowered when an earthquake occurs. It is an enlarged view of the same main part, showing an operating state in which the horizontal member moves downward and remains stationary. FIG. 3 is an explanatory diagram showing a method for determining the curved shape of a guide groove.

Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings.
The seismic type article fall prevention device of the present invention prevents articles placed on a shelf board of a cabinet or the like from falling due to vibrations. When installed, the opening side of the cabinet (the direction in which items stored on the shelves are taken out from the cabinet) is the front, the back plate side of the cabinet (the direction in which items are stored from the outside into the cabinet) is the rear, and the rear side is Define left and right when facing.
In addition, a front view is a view seen from the front.

[Embodiment 1]
<Seismic type article fall prevention device>
As shown in the perspective views of FIGS. 1 to 3 and the partially exploded perspective view of FIG. It has a pair of left and right body parts 2 and 3 disposed at the ends, and a horizontal member H extending in the left and right direction between the left and right body parts 2 and 3.
The left and right main bodies 2 and 3 are symmetrical in plane, and have a base end supported by a left-right support shaft J1 provided in the main bodies 2 and 3, and a rocking body 4 that swings in the vertical direction. , 3, which senses vibrations and serves as a trigger for the rocking body 4, which is stationary in the standby state S, to start rocking.

The rocking body 4 includes a front member F including a horizontal member H, and a rear member R including a base end portion 4A.
In the seismic type article fall prevention device 1, the front member F is supported with respect to the rear member R so as to be slidable approximately in the radial direction around the left-right support shaft J1.
In the seismic article fall prevention device 1, when the rocking body 4 swings in the vertical direction, the horizontal member H moves vertically on a predetermined trajectory that does not interfere with the articles on the shelf or surrounding members. A guide means A is provided for guiding the front member F so that the front member F is guided.
In the seismic article fall prevention device 1 of the first embodiment, the horizontal member H moves linearly in the vertical direction.

In the standby state SS shown in FIG. 1, the horizontal member H is stationary above (at the upper end in front of the storage space), and vibrations occur due to earthquakes, etc., and the vibration sensing means K senses vibrations of a predetermined magnitude or more. When this happens, the horizontal member H descends as indicated by the arrow in FIG. 2 and comes to rest at the height position of the operating state OS shown in FIG. 3 (an upper and lower intermediate position in front of the storage space).
The horizontal member H is vertically moved by the guide means A between the standby state SS shown in FIG. 1 and the operating state OS shown in FIG. 3 as described above.

As shown in FIG. 4, the main body 2 includes a substrate 2A and a cover body 2B, and the main body 3 includes a substrate 3A and a cover body 3B.
Since the left and right main bodies 2 and 3 are plane symmetrical, the exploded perspective view shown in FIG. 5, the cross-sectional plan view around the rocking body 4 shown in FIG. With reference to the drawings, the structures of the main body parts 2 and 3 will be explained, mainly using the main body part 2 as a representative.

(oscillator)
A stepped rivet 8 is provided in the rear through hole 4d of the support G2 which is the front member F, the long hole 4b at the rear of the rear member R, and the rear through hole 4c of the support G1 which is the front member F. Insert and tighten the shaft end.
A stepped rivet 9 is inserted into the front through hole 4d of the support G2, the front elongated hole 4b of the rear member R, and the front through hole 4c of the support G1, and the shaft ends are crimped.

As a result of the above, the supports G1 and G2, which are the front member F, become slidable with respect to the rear member R.

In a preferred embodiment, the supports G1 and G2 that support the horizontal member H in the front member F and the rear member R are arm-shaped. Then, using the arm-shaped supports G1, G2 and the arm-shaped rear member R, the supports G1, G2, which are the front member F, are inserted into the front and rear elongated holes 4b, 4b formed in the rear member R. Slide the front member F with the front and rear connecting pins (stepped rivets 8, 9) inserted. Such a configuration simplifies the mechanism for sliding the front member F with respect to the rear member R.

The roller C is externally fitted onto the head 9a of the stepped rivet 9, and the mounting screw 13 is screwed into the screw hole 9b while the roller C is inserted into the guide groove B formed in the substrate 2A.
Fit the fitting protrusion 7a of the bearing body 7 into the through hole 2a of the substrate 2A, insert the shaft I into the support hole 7b of the bearing body 7, and insert the shaft I into the through hole 4a of the base end of the rear member R. Insert into.
When the cover body 2B is attached to the substrate 2A, the shaft I is inserted into the support hole 10b (see also FIG. 4) of the support column 10B of the cover body 2B.
The mounting screw 14 is inserted into the through hole 4e of the support G1, which is the front member F, and screwed into the end of the horizontal member H, which is the front member F, to attach the horizontal member H to the support G1.

As a result of the above, the swinging body 4 (front member F, rear member R) can swing vertically around the left-right support shaft J1.

(Guide means)
The guide means A includes a vertical guide groove B formed in the substrates 2A and 3A of the main body parts 2 and 3, and a roller C attached to the front member F that moves up and down along the guide groove B.
As described above, the guide means A causes the horizontal member H to move linearly in the vertical direction when the swinging body 4 swings in the vertical direction.

(Seismic sensing means)
The pendulum 5 is formed by inserting the mounting screws 11, 11 into the through holes 5b, 5b of the support portion 5A and screwing them into the screw holes 5e, 5e of the weight portion 5B.
The end of the tension coil spring L is hooked to the spring hook 6b at one end of the stopper 6 and the spring hook 2e provided upright on the board 2A, and the stopper 6 is inserted into the side opening 5c of the support 5A. With the hole 5a and the through hole 6a of the stopper 6 aligned, the support column 10A of the cover body 2B (see also FIG. 4) is inserted into the through holes 5a and 6a.
Screw the mounting screw 12 into the screw hole 10a of the support column 10A of the cover body 2B through the through hole 2b of the board 2A.

As a result, the pendulum 5 hangs while being swingably supported around the left-right support shaft J2.

A contact portion 6c at the other end of the stopper 6 is located within the side opening 5d of the pendulum 5, and the contact portion 6c contacts the contact surface E on the upper surface of the rear end portion of the rear member R of the oscillator 4.
The pendulum 5, the stopper 6, and the tension coil spring L constitute a vibration sensing means K that senses vibrations and serves as a trigger for the rocking body 4, which is stationary in the standby state S, to start rocking.
That is, when a vibration occurs due to an earthquake or the like and the vibration sensing means K senses a vibration of a predetermined magnitude or more, the pendulum 5 moves the stopper 6, thereby causing the rocking body 4 to rock.

(Installing the cover body to the board)
As described above, screw the mounting screws 12 into the screw holes 10a of the pillars 10A of the cover body 2B through the through holes 2b at the rear of the board 2A, and also screw the mounting screws 12, 12 through the through holes 2c, 2c at the front of the board 2A. The board 2A and the cover body 2B are integrated by screwing into the screw holes 10c, 10c of the pillars 10C, 10C (Fig. 4) in the front part of the cover body 2B, and the board 3A and the cover body 3B are also integrated in the same way. do.

<Cabinet>
The cabinet 16 shown in the perspective view of FIG. 8 and the perspective views of FIGS. 9 and 10 in which the door body is made transparent includes a main body 17 and a left and right cabinet supported rotatably around a vertical axis with respect to the main body 17. The door bodies 22, 23, etc. are provided.
The main body 17 is formed by left and right side plates 18, 19, a top plate 20, a bottom plate (not shown), and a back plate 21, and includes shelf boards 24, 24, . . . that partition storage spaces S, S, .
The door bodies 22 and 23 are provided with an opening/closing operation part M composed of a handle, an electronic lock, an authentication panel, etc., and open and close the opening 17A on the front surface of the main body 17.

<Installation structure of seismic type article fall prevention device on cabinet body>
As shown in the enlarged perspective view of main parts in FIG. 11, first, the claws 26A and 26B of the fixing metal fitting D are inserted into the shelf claw holes 25 and 25 of the side plate 18 of the cabinet 16. Similarly, the fixing metal fittings D are attached to the side plate 19 as well.
Next, the openings 2C and 3C of the main bodies 2 and 3 of the shock-sensing article drop prevention device 1 are attached to the fixing fittings D and D, and the engaging grooves U and U of the main bodies 2 and 3 (Fig. 4) are engaged with the claws 26C, 26C of the fixing metal fittings D, D.
Next, screw the mounting screw 15 into the screw hole 27 of the fixture D through the through hole 2d of the main body part 2, and screw the mounting screw 15 into the screw hole 27 of the fixture D through the through hole 3d (FIG. 4) of the main body part 3. Screw together.

As described above, the seismic type article fall prevention device 1 is placed at the left and right ends of the storage space S on the shelf board 24, as shown in the perspective view of FIG. 9 and the enlarged view of the main part of FIG. Therefore, it can be easily attached to the cabinet 16 at a predetermined position.

<Operation of seismic type article fall prevention device>
(normal times)
The seismic object fall prevention device 1 attached to the cabinet 16 as described above is shown in the perspective view of FIG. 9 and the enlarged view of the main parts seen from the right in FIG. The standby state SS shown is maintained.
That is, the oscillating body 4 is supported by the point where the contact surface E of the rear end of the rear member R of the oscillating body 4, which is located behind the left-right support shaft J1, contacts the contact portion 6c of the stopper 6. The direction of the force based on the moment of forward falling around the left-right support shaft J1 and the moment due to the restoring force of the tension coil spring L passes through the left-right support shaft J2 as indicated by arrow V in FIG.

As a result, the stopper 6, which is rotatable around the left-right support shaft J2, does not rotate, and the equilibrium state of the moment around the left-right shaft J1 is maintained, so that the rocking body 4 remains stationary.
Therefore, the standby state SS in which the horizontal member H is located at the front upper end of the storage space S is maintained.

(When detecting vibration)
When a vibration occurs due to an earthquake or the like and a force is applied that causes the pendulum 5 to swing back and forth around the left-right support shaft J2, when the operating portion N of the pendulum 5 tries to push the stopper 6 forward, the tension coil spring L , the restoring force of the tension coil spring L acts against the force pushing the stopper 6 forward.

As a result, when the force with which the operating portion N of the pendulum 5 tries to push the stopper 6 forward exceeds a predetermined amount, the stopper 6 rotates, and the contact portion 6c of the stopper 6 touches the oscillator 4. The position where the rear end of the rear member R contacts the contact surface E shifts forward.

When such a shift occurs, the equilibrium state of the moment around the left-right axis J1 is disrupted, and the rocking body 4 swings downward under its own weight, as shown by the arrow in the enlarged view of the main part seen from the right side of FIG. As shown in the perspective view of FIG. 10 and the enlarged view of the main part seen from the right side of FIG. Become.

As described above, when the seismic sensing means K senses a vibration of a predetermined magnitude, the seismic sensing means K starts the rocking of the rocking body 4, and as a result, the seismic article fall prevention device 1 is placed in the standby state. The state changes from SS to operating state OS.
In this operating state OS, as shown in FIG. 10, the horizontal member H is located at the front vertical intermediate position of the storage space S, so that articles (not shown) placed on the shelf board 24 of the cabinet 16 can be prevented from falling due to vibration.

(Return from operating state to standby state)
When the horizontal member H is lifted in the operating state OS shown in FIGS. 10 and 15, the stopper 6 also rotates due to the restoring force of the tension coil spring L as the rocking body 4 rotates around the support shaft J1. Therefore, by raising the horizontal member H to the positions shown in FIGS. 9 and 13, it is possible to easily return to the standby state SS.

As in this embodiment, in the standby state SS, the horizontal member H is located at the upper end of the front of the storage space S, and in the operating state OS, the horizontal member H descends by its own weight to an intermediate position in front of the storage space S in the upper and lower directions. In a preferred embodiment, the stopper 6 is rotated by the restoring force of the tension coil spring L to return from the operating state OS to the standby state. As a result, in the standby state SS, the horizontal member H is located at the lower end in front of the storage space S, and in the operating state OS, the horizontal member H is pulled up by the tension coil spring to a vertical intermediate position in front of the storage space S. The capacity of the tension coil spring can be made smaller than the above.

<Method for determining the curved shape of the guide groove>
As shown in the explanatory diagram of FIG. 16, a plurality of points on a predetermined trajectory T in which the center HO of the horizontal member H moves vertically, in this embodiment, a predetermined trajectory T that moves linearly in the vertical direction, For example, from P1 to P5, a plurality of positions, for example Q1 to Q5, of the center CO of the roller C corresponding to P1 to P5 are determined, and the positions Q1 to Q5 are spline interpolated to determine a spline curve SP passing through the positions Q1 to Q5.
Then, the curve of the guide groove B along which the roller C is guided is determined from the spline curve SP.

As shown in FIG. 16, the left-right support axis J1 of the rocking body 4, the center CO of the roller C, and the center HO of the horizontal member H are located on the same plane, and the front member F is positioned relative to the rear member R. In a preferred embodiment, the direction of sliding is on the same plane. This facilitates the design of determining the curved shape of the guide groove B.

[Embodiment 2]
In the seismic article fall prevention device 1 according to Embodiment 2 of the present invention shown in the perspective view of FIG. 17, the same reference numerals as in FIGS. 1 to 3 in Embodiment 1 indicate the same or equivalent parts.
Similarly, in the seismic type article fall prevention device 1 according to the second embodiment of the present invention shown in enlarged views of the main parts seen from the right side of FIGS. 18 to 20, FIGS. 13 to 15 of the first embodiment The same reference numerals indicate the same or equivalent parts.

The seismic article fall prevention device 1 of the second embodiment has the same basic structure as the seismic article fall prevention device 1 of the first embodiment, and includes a rocking body 4 (front member F, rear member R). ) swings in the vertical direction around the left-right support shaft J1, and the front member F2 slides with respect to the rear member R.
Moreover, the seismic type article fall prevention device 1 of the second embodiment includes the guide means A and the seismic means K similar to those of the first embodiment.

Similar to Embodiment 1, horizontal member H in Embodiment 2 moves vertically on a predetermined trajectory that does not interfere with the articles on the shelf and surrounding members, but unlike Embodiment 1, , does not move vertically.
That is, in the standby state SS of FIGS. 17 and 18, the horizontal member H in the second embodiment is located above and behind the position shown in FIG. The cabinet 16 is located behind the front reinforcement of the main body 17 of the cabinet 16 at the top.
When the vibration sensing means K senses a vibration of a predetermined magnitude, the rocking body 4 swings downward, and the horizontal member H moves from the standby state SS position in FIG. 18 to the direction indicated by the arrow in FIG. It moves downward while moving forward, moves along a predetermined trajectory to the operating state OS shown in FIG. 20, and comes to rest.

In the standby state SS, the horizontal member H is hidden behind the front surface of the upper shelf board 24 except for the top shelf, and is located behind the front reinforcement of the main body 17 of the cabinet 16 at the top shelf, so the horizontal member Since H is difficult to be visually recognized from the front, the cabinet 16 equipped with the seismic article fall prevention devices 1, 1, . . . has a neat appearance.
Moreover, when storing stored items on the shelf board 24 or when taking out stored items on the shelf board 24, the horizontal member H does not get in the way. Since the space between the front surface of the cabinet 16 and the door bodies 22 and 23 can be minimized, the storage space inside the cabinet 16 can be utilized to the maximum.

<Method for determining the curved shape of the guide groove>
As shown in the explanatory diagram of FIG. 21, the center HO of the horizontal member H moves vertically from a plurality of points, for example P1 to P5, on a predetermined trajectory T, and the roller C corresponding to P1 to P5 is A plurality of positions, for example, Q1 to Q5, of the center CO are determined, and a spline curve SP passing through the positions Q1 to Q5 is determined by performing spline interpolation on the positions Q1 to Q5.
Then, the curve of the guide groove B along which the roller C is guided is determined from the spline curve SP.

<Modified example>
In the above embodiment, the horizontal member H is located at the upper end in front of the storage space S in the standby state SS, and the horizontal member H is lowered to an intermediate position in front of the storage space S in the operating state OS. However, a configuration may also be adopted in which the horizontal member H is located at the front lower end of the storage space S in the standby state SS, and the horizontal member H rises to a vertical intermediate position in front of the storage space S in the operating state OS.

<Effect>
The shock-sensing type article fall prevention device 1 according to the present invention includes a horizontal member H, and a rocking body 4 that swings around a left-right support shaft J1 is divided into a front member F and a rear member R. The front member F is slidably supported with respect to the member R, and when the rocking body 4 swings in the vertical direction, the horizontal member H has a predetermined trajectory in which the horizontal member H does not interfere with the articles on the shelf board or the surrounding members. A guide means A is provided for guiding the front member F so as to move the front member F in the vertical direction.

As a result, the horizontal member H that moves in the vertical direction between the standby state SS and the operating state OS does not move along an arc-shaped locus that expands forward, but moves directly in the vertical direction, for example, in the depth direction (back and forth direction). ), a sufficient amount of movement of the horizontal member H can be ensured in a narrow operating space.
Therefore, when the seismic article fall prevention device 1 according to the present invention is used in a cabinet equipped with a door body that opens and closes the front opening, it is necessary to provide a large clearance between the door body and the front surface of the shelf board. Since there is no clearance and the operation is stable and reliable even if the clearance is narrowed, the storage space of the cabinet provided with the door body can be utilized as effectively as possible.

The above description of the embodiments is all illustrative, and the present invention is not limited thereto. Various improvements and changes can be made without departing from the scope of the invention.

1 Seismic type article fall prevention device 2, 3 Main body parts 2A, 3A Board 2a, 2b, 2c, 2d Through hole 2e Spring hanging part 2B, 3B Cover body 2C, 3C Opening part 3d Through hole 4 Rocking body 4A Base end part 4a Through hole 4b Elongated hole 4c, 4d, 4e Through hole 5 Pendulum 5A Support part 5B Weight part 5a, 5b Through hole 5c, 5d Side opening 5e Threaded hole 6 Stopper 6a Through hole 6b Spring hanging part 6c Contact part 7 Bearing Body 7a Fitting projection 7b Support hole 8, 9 Stepped rivet 9a Head 9b Threaded hole 10A, 10B, 10C Support column 10a Threaded hole 10b Support hole 10c Threaded hole 11-15 Mounting screw 16 Cabinet 17 Main body 17A Opening 18, 19 Side plate 20 Top plate 21 Back plate 22, 23 Door body 24 Shelf plate 25 Shelf claw hole 26A, 26B, 26C claw 27 Screw hole A Guide means B Guide groove C Roller CO Center D Fixing metal fitting E Contact surface F Front side member G1 , G2 Support body H Horizontal member HO Center I Shaft J1, J2 Lateral support axis K Vibration sensing means L Tension coil spring M Opening/closing operation unit N Operation unit OS Operating status P1 to P5 Predetermined trajectory on which the horizontal member moves in the vertical direction Upper points Q1 to Q5 Position of center of roller R Rear side member S Storage space SS Standby state SP Spline curve T Predetermined trajectory U along which the horizontal member moves vertically Engagement groove V Direction of force

Claims (4)

A seismic article fall prevention device that is attached to the cabinet through a plurality of shelf claw holes formed at predetermined intervals in the vertical direction in the cabinet, and that prevents articles placed on the shelf from falling due to vibrations. ,
a pair of left and right main bodies disposed at the left and right ends of the storage space on the shelf;
a rocking body having a horizontal member extending in the left and right direction between the left and right body parts, a base end of which is supported by a left and right support shaft provided in the body part, and swinging in the vertical direction;
comprising a vibration sensing means provided in the main body that senses vibrations and serves as a trigger for the rocking body, which is stationary in a standby state, to start rocking;
The rocking body includes a front member including the horizontal member and a rear member including the base end,
The front member is supported so as to be slidable in a substantially radial direction around the left-right support shaft with respect to the rear member, and when the rocking body swings in the vertical direction, the horizontal member moves on the shelf board. guide means for guiding the front member to move vertically on a predetermined trajectory that does not interfere with the article and surrounding members;
In normal times, the rocking body is stationary and the horizontal member is in the standby state located at an upper end or a lower end in front of the storage space,
When a vibration occurs and the vibration sensing means senses a vibration of a predetermined magnitude or more, the vibration sensing means starts rocking the rocking body so that the front member is not guided by the guide means. , the horizontal member moves in the vertical direction, and the horizontal member moves to a vertical intermediate position in front of the storage space and enters a stationary operating state;
The main body portion is provided with a fixing metal fitting having a claw that is selectively inserted into any one of the plurality of shelf nail holes, and is attached to the cabinet via the fixing metal fitting .
Seismic type article fall prevention device. The guide means includes a vertical guide groove formed on the substrate of the main body, and a roller attached to the front member that moves up and down along the guide groove,
A plurality of positions of the center of the roller corresponding to the plurality of points are determined from a plurality of points on the trajectory along which the horizontal member moves in the vertical direction, and the plurality of positions are determined by performing spline interpolation on the plurality of positions. determining a spline curve to pass through, and determining a curve of the guide groove from the spline curve;
The seismic type article fall prevention device according to claim 1. A vibration-sensing article fall prevention device that prevents articles placed on a shelf from falling due to vibrations,
a pair of left and right main bodies disposed at the left and right ends of the storage space on the shelf;
a rocking body having a horizontal member extending in the left and right direction between the left and right body parts, a base end of which is supported by a left and right support shaft provided in the body part, and swinging in the vertical direction;
comprising a vibration sensing means provided in the main body that senses vibrations and serves as a trigger for the rocking body, which is stationary in a standby state, to start rocking;
The rocking body includes a front member including the horizontal member and a rear member including the base end,
The front member is supported so as to be slidable in a substantially radial direction around the left-right support shaft with respect to the rear member, and when the rocking body swings in the vertical direction, the horizontal member moves on the shelf board. guide means for guiding the front member to move vertically on a predetermined trajectory that does not interfere with the article and surrounding members;
In normal times, the rocking body is stationary and the horizontal member is in the standby state located at an upper end or a lower end in front of the storage space,
When a vibration occurs and the vibration sensing means senses a vibration of a predetermined magnitude or more, the vibration sensing means starts rocking the rocking body so that the front member is not guided by the guide means. , the horizontal member moves in the vertical direction, and the horizontal member moves to a vertical intermediate position in front of the storage space and enters a stationary operating state;
The guide means includes a vertical guide groove formed on the substrate of the main body, and a roller attached to the front member that moves up and down along the guide groove,
A plurality of positions of the center of the roller corresponding to the plurality of points are determined from a plurality of points on the trajectory along which the horizontal member moves in the vertical direction, and the plurality of positions are determined by performing spline interpolation on the plurality of positions. determining a spline curve to pass through, determining a curve of the guide groove from the spline curve;
The horizontal support shaft of the rocking body, the center of the roller, and the center of the horizontal member are located on the same plane;
Seismic type article fall prevention device. In the standby state, the horizontal member is located at the front upper end of the storage space,
In the operating state, the rocking body rocks downward under its own weight;
The seismic type article fall prevention device according to any one of claims 1 to 3 .

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