Seismic article drop prevention device

Abstract

To provide a seismoscope type article fall preventing device which is operated by sensing a shake with high sensitivity, since a conventional seismoscope type article fall preventing device can be operated for a shake of a certain level or more, but is hardly operated when a gentle shake continues for a long time.SOLUTION: A vibration-sensitive article fall prevention device includes a hanger having a shape in which an L-shaped lever portion and a U-shaped hook portion are vertically connected and having a through hole for rotation in the vicinity of a connection portion, a weight rotatably provided at an upper end portion of the hanger via a pivot, a holding member in which the hanger is provided in the through hole for rotation via a pivot, and a fall prevention member disposed between openings of the holding members provided in a pair on the left and right sides. To prevent an article from falling by moving a fall prevention member locked to a hanger part to an opening part of an article storage shelf by its own weight when a gravity center position of a weight is changed by shaking of an earthquake or the like and the hanger part is rotated SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention is a seismic article fall prevention device that prevents articles placed on an article storage shelf from falling due to shaking such as an earthquake. [Background technology]

[0002] There are earthquake-sensitive device types to prevent items from falling off shelves due to shaking caused by earthquakes, etc., but both of these devices have an operating mechanism that activates when the shaking exceeds a certain level, preventing items from falling off the storage shelves.

[0003] For example, as disclosed in Patent Document 1, an earthquake-sensitive article fall prevention device is provided in which the weight 32 collides with the coil spring 20 due to earthquake shaking, causing the coil spring 20 to bend and deform, causing the stopper member 6 to rotate under its own weight. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2015-39534 [Patent Document 2] Patent No. 2826811 Summary of the Invention [Problem to be solved by the invention]

[0005] According to Figures 4(a) and (b) of Patent Document 1, when an earthquake occurs, the weight 32 collides with the coil spring 20, causing the coil spring 20 to bend and deform, thereby causing the stopper member 6 to rotate under its own weight, thereby forming a seismic operating means.

[0006] Furthermore, according to the description in FIG. 5 of Patent Document 2, when the pendulum 35 hits the engaging element 30 due to shaking from an earthquake, the engaging support of the tilting plate 20 is released and the horizontal bar 15 is activated, thereby forming a seismic operating means.

[0007] Conventional earthquake-sensitive article fall prevention devices are capable of operating in response to shaking above a certain level, but they have the problem of being difficult to operate in response to long periods of gentle shaking, and there is a demand for earthquake-sensitive article fall prevention devices that can sensitively detect shaking and activate. [Means for solving the problem]

[0008] A hanger that has an L-shaped lever part and a U-shaped hook part connected vertically, and has a through hole for rotation near the connecting part; a weight rotatably provided on an upper end of the lever portion via a pivot; a holding member for holding the hanger in the rotation through-hole via a pivot, The seismic article fall prevention device is characterized in that the holding members are provided in a pair on the left and right and comprise fall prevention members that are placed on the hook portions of the hangers.

[0009] The hanger is also characterized in that a protrusion that protrudes outward is provided near the connecting portion between the L-shaped lever portion and the U-shaped hook portion. Furthermore, a rack-shaped gear is provided inside the hook of the hanger, and pinion-shaped gears are provided on the outer periphery of the caps on both ends of the fall prevention member.Furthermore, by configuring the fall prevention member and the holding part in the standby state of the fall prevention member in a gear shape and the seismic mechanism of the holding part by a pivot that rotates with a weight, and another pivot, the standby state of the fall prevention member can be released even with gentle shaking, and the fall prevention function is exerted.

[0010] In this invention, when shaking such as an earthquake causes the center of gravity of the weight to change and the hanger part to rotate, the fall prevention member attached to the hanger part falls under its own weight and moves to the opening of the item storage shelf, thereby preventing items from falling. [Effects of the Invention]

[0011] The earthquake-sensing article fall prevention device of the present invention has a simple structure, allowing for miniaturization and cost savings. Even after the fall prevention member is activated, initialization is easy, as it can be completed by simply returning the fall prevention member to the hanger. Furthermore, even in the case of a long, gentle earthquake, the fall prevention member will activate and prevent articles from falling, since the center of gravity of the weight is utilized. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of an article storage shelf equipped with a seismic article fall prevention device. [Figure 2] FIG. 10 is a perspective view of the seismic article fall prevention device in an engaged state. [Figure 3] FIG. 2 is a perspective view of the seismic object fall prevention device in a standby state. [Figure 4] FIG. 2 is an exploded enlarged perspective view showing the component configuration of the seismic object fall prevention device. [Figure 5] FIG. 10 is an enlarged cross-sectional side view of the seismic object fall prevention device in a standby state. [Figure 6] FIG. 10 is an enlarged plan cross-sectional view of the left guide case of the seismic article fall prevention device. [Figure 7] 1A and 1B are enlarged cross-sectional side views of a seismic article fall prevention device in which a fall prevention member is shifting to a standby position. 1A is an enlarged cross-sectional side view of a fall prevention member starting to move to the standby position. 1B is an enlarged cross-sectional side view of a fall prevention member in a final state of movement to the standby position. [Figure 8] (a) to (d) are enlarged cross-sectional side views of the state of a fall prevention member in a seismic article fall prevention device from a standby position to standby unlocking. (a) is an enlarged cross-sectional side view showing the state before the seismic operating means is moved (standby). (b) is an enlarged cross-sectional side view showing the state of the seismic operating means during operation. (c) is an enlarged cross-sectional side view showing the state of the seismic operating means in the final stage of hook unlocking. (d) is an enlarged cross-sectional side view showing the state when the seismic operating means has completed hook unlocking. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0013] The earthquake-sensitive article fall prevention device of the present invention will be described with reference to the drawings.

[0014] Figure 1 shows an item storage shelf 1 equipped with a seismic item fall prevention device 6 of the present invention. The seismic item fall prevention device 6 is provided in which holding members 8L, 8R are arranged on the front of the side panels 2 on both sides without encroaching on the area of ​​the opening surface 5 formed between the upper and lower shelf boards 3 of the item storage shelf 1, and fall prevention members 7 that move up and down in front of the opening surface 5 engage with the left and right holding members 8L, 8R to prevent items (books) 4 from falling.

[0015] The standby position of the fall prevention member 7 is in front of the shelf 3 of the item storage shelf 1, and is a position that does not obstruct the taking in and out of items (books) 4. Furthermore, when the seismic sensor function is activated by shaking such as an earthquake, the standby state of the fall prevention member 7 is unlocked and the fall prevention member 7 moves downward to the locked state position.

[0016] In the item storage shelf 1 of Figure 1, the first, second, fourth, and fifth shelves from the bottom of the shelf board 3 show the installation state of the seismic item fall prevention device (standby state) 6(U), and the third shelf shows the installation state of the seismic item fall prevention device (locked state) 6(L).

[0017] In this embodiment, the seismic item dropping device 6 is installed on the item storage shelf 1, and the description will be based on looking at the opening surface 5 of the item storage shelf 1 from the front, with the front being the forward direction, the rear being the rearward direction, the top being the upward direction, the bottom being the downward direction, the left being the leftward direction, and the right being the rightward direction.

[0018] 2 and 3 show the seismic object drop device (locked state) (standby state) 6(L), 6(U), with both ends of the fall prevention member 7 locked to the opening underside 28 of the guide cases 9L, 9R. In this case, the fall prevention member 7 can move up and down on the opening surface 27 of the guide cases 9L, 9R, and is held by the upper hanger part 10, so that the fall prevention member 7 is in a standby state.

[0019] The component configuration of the seismic object drop device 6 will be explained with reference to Figures 4, 5 and 6. The fall prevention member 7 has a cap 12 with a gear 12a at the end of a bar 11, and the gear 12a is fixed so that its position is aligned on the left and right.

[0020] The holding members 8L, 8R have hanger parts 10 assembled to the top of the guide cases 9L, 9R. A pin a14 is used to form a pivot a20 that can rotate around the through holes a16 of the guide cases 9L, 9R and the through hole b17 of the hanger 13. The lever 22 of the hanger 13 can rotate in the direction of arrow B, and the hook 23 can rotate in the direction of arrow C, with the pivot a20 as a fulcrum.

[0021] Furthermore, at the end of the lever 22, a pivot b21 is formed that can rotate the mounting plate 30, which has a weight 31 fixed to it with a screw 33, from a through hole c18 of the lever 22 to a through hole d19 of the mounting plate 30 with a pin b15, and the mounting plate 30 can rotate in the direction of arrow A with the pivot b21 as a fulcrum.

[0022] Therefore, when shaking such as an earthquake occurs, the mounting plate 30 to which the weight 31 is fixed swings in the direction of arrow A with the pivot 21 as the fulcrum, and the pivot b21 rotates in the direction of arrow B with the pivot a20 as the fulcrum, causing the hook 23 to rotate in the direction of arrow C through the opening 26 of the guide cases 9L and 9R.

[0023] 5 shows the standby state of the fall prevention member 7, but when the hanger part 10 rotates around the pivot a20 as a fulcrum, the fall prevention member 7 having the cap 12 enters an unlocked state. As shown in FIG. 6, the caps 12 fixed to both ends of the bar 11 of the fall prevention member 7 are structured so that they can move in the direction of arrow E in FIG. 5 within the opening inner surface 27a, protrusion c27b, and opening edge 29 of the guide cases 9L and 9R.

[0024] 7(a) and (b) illustrate the movement of the fall prevention member 7 to the standby position. In FIG. 7(a), the center of gravity X of the pivot weight 31, which pivots around the pivot b21 at the end of the lever 22 of the hanger 13 as a fulcrum, is a distance P behind the pivot a20, and the hook 23 of the hanger 13 has rotated, putting the hanger part 10 in an unlocked state.

[0025] When the hanger part 10 is in the unlocked state described above, if the fall prevention member 7 is moved upward in the direction of arrow E along the opening surface 27 of the guide cases 9L and 9R, the gear 12a of the cap 12 attached to the end of the fall prevention member 7 will come into contact with the protrusion a24 of the hanger 13.

[0026] Furthermore, when the fall prevention member 7 is pushed upward, the hanger part 10 rotates in the direction of arrow F with the pivot a20 as the fulcrum, and as shown in Figure 7(b), the pivot b21 of the lever 22 containing the weight 31 rotates in the direction of arrow B with the pivot a20 as the fulcrum, and the center of gravity X of the weight 31 moves forward a distance P.

[0027] At this time, hook 23 and gear 23a of hanger 13 come into contact with cap 12 and gear 12a of fall prevention member 7, and hook end 23b rotates cap 12 and gear 12a of fall prevention member 7 downward in the direction of arrow C, holding fall prevention member 7 and putting it into a standby state. With the above-mentioned single operation, fall prevention member 7 can be put into a standby state.

[0028] 8(a), (b), (c), and (d), the process of unlocking the hanger part 10 from the standby state of the seismic article dropping device 6(U) to the standby state of the fall prevention member 7 due to shaking caused by an earthquake or the like is explained.

[0029] 8(a) shows the standby state of the seismic article drop device 6(U). In the standby state of the fall prevention member 7, the pivot a20, which is the rotation fulcrum of the hanger part 10, is at a rear distance S from the center of the fall prevention member 7, so that the fall prevention member 7 is in a position where rotation due to gravity does not occur around the pivot a20 fulcrum. Furthermore, the center of gravity X of the attached weight 31, which is rotatable around the pivot b21 at the end of the lever 22 of the hanger 13, is at a forward distance P, so that the fall prevention member 7 is stably held.

[0030] When subjected to shaking such as an earthquake, the weight 31 attached to the hanger part 10 rotates in the direction of arrow A with the pivot b21 as the fulcrum, causing the pivot b21 to rotate in the direction of arrow B with the pivot a20 as the fulcrum, and the hook 23 of the hanger 13 to rotate in the direction of arrow C.

[0031] 8(b) shows a state in which, due to shaking caused by an earthquake or the like, the center of gravity X of weight 31 is at the same perpendicular position as pivot a20, which is the rotation fulcrum of hanger section 10 and hanger 13. As hook 23 and gear 23a of hanger 13 rotate in the direction of arrow C with pivot a20 as the fulcrum, gear 12a of fall prevention member 7 comes into contact with inner surface 27a of the opening of guide case 9L, rotates in the direction of arrow D, and moves in the direction of arrow E.

[0032] Figure 8(c) shows the final stage of unlocking, where the cap 12 and gear 12a of the fall prevention member 7 come into contact with the hook 23 and hook end 23b of the hanger 13 and the inner surface 27a of the opening of the guide case 9L. At this time, the center of gravity X of the weight 31 swings, causing pivot b21 to be at a distance P rearward from pivot a20, and the weight of the fall prevention member 7 and the weight of the weight 31 rotate about pivot a20 as a fulcrum, causing the fall prevention member 7 to move downward as shown by arrow E.

[0033] 8(d), the lever end 22a of the hanger 13 in FIG. 5 comes into contact with the protrusion b25, with the pivot a20 as the fulcrum, and the rotation of the hanger part 10 is stopped. At the same time, the center of gravity X of the weight 31 is located a distance P rearward from the pivot a20, the hook 23 of the hanger 13 rotates, the cap 12 of the fall prevention member 7 is unlocked, and the fall prevention member 7 moves under its own weight to the opening underside 28 of the guide cases 9L, 9R, and the seismic article fall prevention device 6(L) is engaged, preventing the article (book) 4 from falling.

[0034] Furthermore, if the weight 31 rotates around the pivot b21 as a fulcrum due to shaking such as an earthquake, and the center of gravity X of the weight 31 passes the pivot a20 point in the rear direction, but the pivot b21 position does not pass the pivot a20 point in the rear direction, the unlocked state will not be reached.

[0035] However, when the swinging of weight 31 causes hanger part 10 to rotate around pivot a20 as a fulcrum, gear 23a of hanger 13 and hook 23 meshes with cap 12 with gear 12a of fall prevention member 7, and cap 12 of fall prevention member 7 comes into contact with inner surface 27a of the opening of guide case 9, and the action of the weight of fall prevention member 7 prevents hanger part 10 from restoring its rotation around pivot a20 as a fulcrum, and as the swinging continues, the locking state is gradually reached, and with a long swinging motion, the standby state of the fall prevention member can be unlocked and locked.

[0036] Furthermore, the gears 12a of the mounting caps 12 on both ends of the fall prevention member 7 described above and the hanger 13 and gear 23a of the hanger part 10 are engaged by the weight of the fall prevention member 7, so the unlocking status of the hanger part 10 is linked on both sides, preventing one-sided unlocking. Furthermore, the seismic sensor uses a weight 31, but it is possible to create a seismic sensor that can respond to various vibrations by changing the weight of the weight 31. The weight 31 is fixed to the mounting plate 30 with a screw 33, but it may be integrated with the mounting plate 30. [Explanation of symbols]

[0037] 1. Storage shelf 2 Side panels 3 shelves 4 Goods (books) 5 Opening surface 6(L) Seismic type article fall prevention device (locking position) 6(U) Seismic type article fall prevention device (standby position) 7 Fall prevention member 8(L)(R) Holding member 9(L)(R) Guide Case 10 Hanger section 11 Bar 12 Caps 12a Gear 13 Hanger 14 Pin A 15 pin B 16 Through hole a 17 Through hole b 18 Through hole c 19 Through hole d 20 Axis A 21 Axis B 22 Lever section 23 Hook part 23a Gear 23b Hook end 24 protrusion a 25 protrusion b 26 Aperture 27 Opening surface 28 Opening bottom surface 29 Opening edge 30 Mounting plate 31 Weight 32 Cover 33 screws A, B, C, E, F arrows P is the horizontal distance between pivot a and pivot b S: Horizontal distance from pivot a to the center of the fall prevention member T Contact position X Horizontal position of center of gravity of weight

Claims

1. a hanger having an L-shaped lever portion and a U-shaped hook portion connected vertically, with a through hole for rotation provided near the connecting portion; a weight rotatably provided on an upper end of the lever portion via a pivot; a holding member that holds the hanger in the rotation through-hole via a pivot, The seismic article fall prevention device is characterized in that the holding members are provided in a pair on the left and right and comprise fall prevention members that are placed on the hook portions of the hangers.

2. 2. The seismic article fall prevention device according to claim 1, wherein the hanger is provided with a protrusion that protrudes outward near the connecting portion between the L-shaped lever portion and the U-shaped hook portion.

3. 3. A seismic article fall prevention device as described in claim 1 or 2, characterized in that a rack-shaped gear is provided inside the hook portion of the hanger, and a pinion-shaped gear is provided on the outer periphery of the caps at both ends of the fall prevention member.

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