JP6163051B2 - 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, there are a tilting plate having a horizontal member (horizontal reed part) oriented horizontally along the shelf front surface, and a biasing means for biasing and supporting the tilting plate upward, Some include an engagement support portion that engages and supports the tilting plate against the biasing means, and a seismic operation means such as a pendulum that operates due to a shake such as an earthquake (for example, see Patent Document 1). According to this, the seismic operation means is collided with the lower portion of the engagement support portion, and the engagement support portion and the tilting plate are disengaged by rotating the engagement support portion in the vertical direction. ing. The tilting plate is rotated by this disengagement, and the horizontal member prevents the article placed on the shelf from dropping.

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

  However, in the seismic-type article fall prevention device described in Patent Document 1, the rotation shafts of the tilting plate and the engagement support portion are arranged in parallel, and the movement of the horizontal member in the operation direction is engaged and supported. It is the structure which affects the engagement of a part. For this reason, if the hand touches the horizontal member during loading / unloading of the article, the tilting plate and the engagement support portion are easily disengaged, and there is a risk of malfunction such as the horizontal member moving. It was.

  The present invention has been made by paying attention to such a problem, and an anti-seismic article fall prevention device in which a fall prevention function operates reliably with respect to an assumed shaking such as an earthquake and does not malfunction. It is intended to provide.

In order to solve the above problems, the seismic article falling prevention device of the present invention is
A stopper member provided so as to be able to ascend and descend between a predetermined position and an upper position that does not affect the loading and unloading of the article on the shelf in the vertical direction of the shelf, and to prevent the article on the shelf from falling at the predetermined position; ,
An engagement support portion that engages with the engaged portion of the stopper member from either the left or right side and restricts the movement;
Seismic operation means for moving the engagement support portion toward the other side in response to shaking of the shelf, and releasing the engagement state between the engaged portion of the stopper member and the engagement support portion; It is characterized by having.
According to this feature, the engagement support portion is configured to be engaged and disengaged from the left and right directions with respect to the engaged portion of the stopper member that moves up and down in the vertical direction. The movement is less likely to affect the engagement of the engagement support portion. For this reason, even when an external force in the vertical direction is applied to the stopper member, for example, when a hand touches the stopper member when an article is put in or out, the engaged portion of the stopper member and the engagement support portion are disengaged. There is no fear of being damaged, and malfunctions in the seismic-sensing article fall prevention device can be prevented.

The seismic operation means can be moved back and forth or left and right in response to shaking of the shelf, and the engagement state is released by this movement.
According to this feature, since the engaged state is released by swinging in either the front-rear direction or the left-right direction in an earthquake or the like, a reliable fall prevention effect can be realized.

A taper is provided on at least one of the engagement support part and the seismic operation means, and the moving force of the seismic operation means acts obliquely with respect to the engagement support part via the taper. Further, the engagement support portion and the seismic operation means are arranged.
According to this feature, the moving force of the seismic actuation means acts obliquely with respect to the engagement support portion through at least the taper, and instantaneous repulsion between the seismic actuation means and the engagement support portion occurs. As a result, the contact time with each other becomes longer. The amount of work given to the engagement support by the seismic operation means is used to change the contact between the engaged part of the stopper member and the engagement support from the stationary state to the moving state at the beginning of the contact between them. After that, it is used to separate the two against the dynamic friction force existing between the engaged portion and the engagement support portion of the stopper member. Therefore, the engaged portion of the stopper member and the engagement support portion are disengaged with respect to shaking such as an earthquake, and a reliable fall prevention effect can be realized.

The engaging support portion has a fixing portion on one end side thereof, an engaging portion that engages with an engaged portion of the stopper member on the other end side, and the fixing portion and the engaging portion, The contact part of the said seismic-sensing action means via a taper is provided in between.
According to this feature, since the contact portion of the seismic operation means via the taper is provided between the fixed portion and the engagement portion, the movement of the seismic operation means can be effectively reduced to the large movement of the engagement portion. Therefore, the engagement between the engagement support portion and the engaged portion of the stopper member can be reliably released.

The engagement support portion has a first taper portion at a contact portion of the seismic operation means, and a second taper portion that guides the seismic operation means in cooperation with the first taper portion includes the first taper portion. 1 taper part is arrange | positioned so that it may oppose.
According to this feature, the seismic operation means can be brought into contact with the first taper portion with high accuracy by being guided by the second taper portion.

The seismic sensing means includes a rod-shaped portion intersecting with the engagement support portion and a weight member provided at a lower end portion of the rod-shaped portion, and the rod-shaped portion is suspended at the upper end portion so as to be swingable back and forth and right and left. It is characterized by having.
According to this feature, the rod-like part of the seismic means that can swing back and forth and right and left intersects with the engagement support part, so that it can reliably fall against any back and forth swing in any direction during an earthquake or the like Preventive effect can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of an article storage shelf including a seismic article fall prevention device according to a first embodiment. It is a perspective view of the seismic-type article | item fall prevention apparatus in an Example. (A) is a fracture | rupture expansion side view which shows the operation standby state of a seismic-type article fall prevention apparatus, (b) is AA sectional drawing similarly. (A) is a fracture enlarged side view showing a state in which the seismic operation means is operated with respect to the shaking in the front-rear direction, and the seismic operation means collides with the guide member and the engagement support part, and (b) Similarly it is AA sectional drawing. (A) is a fracture | rupture expansion side view which shows the state by which engagement with the engagement support part and the to-be-engaged part of the stopper member was cancelled | released, (b) is AA sectional drawing similarly. (A) is a fracture | rupture expansion side view which shows a mode that a seismic sensing action means act | operates with respect to the shaking of a left-right direction, and a seismic sensing action means elastically deforms an engagement support part, (b) is also A It is -A sectional drawing. (A) is front sectional drawing which shows a mode that the seismic sensing operation means act | operated with respect to the shake of the left-right direction, and the seismic sensing actuation means collided with the engagement support part, (b) is a plane sectional view similarly It is. (A) is a figure which returns a seismic-type article | item fall prevention apparatus to an operation standby state, (b) is AA sectional drawing similarly.

  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-type article fall prevention device according to the embodiment will be described with reference to FIGS. FIG. 1 is a perspective view of an article storage shelf 2 equipped with a seismic-type article fall prevention device (hereinafter referred to as a fall prevention device) 1 according to the present invention. The article storage shelf 2 is a side plate 3 that is spaced apart in the left-right direction. , 3, top plates 4, 4 connecting the opposing surfaces of the upper ends of the side plates 3, 3, and a plurality of upper and lower shelf plates 5 supported by the side surfaces of the side plates 3, 3 facing each other. A plurality of books 15 are placed on the upper surface of the shelf board 5 at each stage. As will be described later, the fall prevention device 1 is attached to both ends of the upper surface of the shelf plate 5 of each stage. In the present embodiment, the fall prevention device 1 is described as being attached to a bookcase. However, the present invention is not limited to this. For example, the fall prevention device 1 may be used by being attached to a fixture or the like for displaying commodities.

  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 when viewed from the side, and a stopper member 6. The stopper member 6 includes both supports. 7 and 7 are provided with a pair of left and right arm portions 8 and 8 whose front end portions protrude from the inside, and a horizontal flange portion 9 whose left and right ends are fixed to opposite surfaces of one end portions of both arm portions 8.

  The left and right supports 7 and 7 include a flat outer plate 7A and an inner plate 7B having the same size, and inner ends of a plurality of boss shafts 12 serving as spacers protruding from the inner surface of the inner plate 7B. A plurality of countersunk screws 13 inserted from the outside of the outer plate 7 </ b> A at positions facing the boss shaft 12 in contact with the opposing surface of the outer plate 7 </ b> A are female screw holes (not shown) provided in each boss shaft 12. By screwing together, the outer plate 7A and the inner plate 7B are coupled so that a required space is formed between their facing surfaces.

  Various members for raising and lowering the recumbent part 9 are incorporated in the supports 7 and 7. In the following description, the structure of the support 7 on the right side of the screen in FIG. 2 will be described, and the description of the other support 7 will be omitted. As shown in FIG. 3, the arm portion 8 described above is disposed slightly above the center in the vertical direction of the support body 7, and the substantially central portion is pivotally supported by the pivot 16 with respect to the inner plate 7 </ b> B. It can be turned up and down with fulcrum as a fulcrum.

  The inner plate 7 </ b> B has an engagement support portion 20 fixed to the rear side end portion 8 b of the arm portion 8 below the pivot 16 that pivotally supports the arm portion 8. That is, the rear side end portion 8b of the arm portion 8 constitutes an engaged portion of the stopper member of the present invention. The engagement support portion 20 is formed in a substantially plate shape by an elastically deformable synthetic resin or the like, and its front side end portion 20a is fixed to the inner plate 7B by a substantially L-shaped bent piece 14 as a fixing portion. Yes. On the rear end side 20b of the engagement support portion 20, a hook-like engagement portion 25 that can be engaged with the rear side end portion 8b of the arm portion 8 is formed in the left-right direction, that is, toward the inner plate 7B. The stopper member 6 can be brought into a standby state for a fall prevention function that is supported in a state in which the stopper member 6 is restricted by the engagement support portion.

  As shown in FIG. 3B, the engaging portion 25 is formed with a concave portion 25a that opens to the inner side plate 7B side at the center portion thereof. The rear end 8b of the arm 8 is fitted into the recess 25a, and the rear end surface 8c of the rear end 8b of the arm 8 abuts against the inner wall 25b of the recess 25a. The load applied to is supported.

  As shown in FIG. 3A, a pendulum member 30, which is a seismic operation means, is suspended by a suspension member 33 on the front side of the stopper member 6. The pendulum member 30 has a rod-like body 31 having a weight 32 at its lower end, and is normally suspended vertically by its own weight. The suspension support member 33 is fixed to the inner plate 7B and is formed in a bent shape having a protruding piece 33a on the outer plate 7A side. A ring portion 34 that is pivotable in the front-rear direction is connected to the hole 33b provided in the protruding piece 33a, and the upper end of the rod-like portion 31 of the pendulum member 30 is pivoted to the ring portion 34 in the left-right direction. Connected as possible. With such a structure, the pendulum member 30 swings with respect to back and forth and left and right swings. The rod-shaped body 31 is arranged in a state of intersecting with the engagement support portion 20 in a natural state, and a substantially central portion of the engagement support portion 20 is designed to be separated from the rod-shaped portion 31 by a predetermined distance.

  In addition, a first taper portion 26 that is inclined toward the inner plate 7B and has a taper continuous with the convex portion 25a is formed on the rear side in the vicinity of the engaging portion 25. Further, a guide member 29 is fixed to the inner plate 7B, and the rod-like portion 31 of the pendulum member 30 cooperates with the first taper portion 26 at a position facing the first taper portion 26 in the engagement support portion 20. The guide member 29 is formed with a second taper portion 29 a that guides the movement of the guide member 29. The 1st taper part 26 and the 2nd taper part 29a incline so that those opposing surfaces may approach gradually toward the engaging part 25. FIG.

  Then, the effect | action and usage method of the fall prevention apparatus 1 of the said Example are demonstrated using FIGS. 4-8. When the article storage shelf 2 vibrates in the front-rear direction due to an earthquake or the like, the weight 32 in the pendulum member 30 serving as the seismic operation means is swung back and forth, and the rod-like portion 31 is engaged as shown in FIG. It is swung in the direction of the joint portion 25.

  First, as shown in FIG. 4B, the rod-shaped portion 31 collides with the second tapered portion 29a and the first tapered portion 26 in the guide member 29, and thereafter, the first tapered portion 26 and the second tapered portion 29a. It moves in the direction of the engaging portion 25 while slidingly contacting. Due to the collision of the rod-shaped part 31 with the first taper part 26, the rear end surface 8c of the arm part rear side end part 8b and the inner wall 25b of the engaging part concave part 25a change from a stationary contact state to a moving state.

  As shown in FIG. 5, when the movement of the rod-shaped portion 31 further proceeds, the moving force in the engaging portion direction X of the rod-shaped portion 31 due to the sliding contact with the first tapered portion 26 by the rod-shaped portion 31 causes the rod-shaped portion 31 to move. And the first taper portion 26 are partly converted in a direction Y (screen downward direction), and the engagement support portion 20 is elastically deformed to the outer plate 7A side by a force in this direction Y. Since the engagement support portion 20 has a rear end (near the engagement portion 25) as a free end, the engagement portion 25 is separated from the rear side end portion 8 b of the arm portion 8 by elastic deformation of the engagement support portion 20. Moved in the direction. Further, since the rod-shaped portion 31 moves while being guided by the second taper portion 29a and pressed against the engagement support portion 20 side, the deformation amount of the engagement support portion 20 is increased.

  Then, as shown in FIG. 6, the engagement support portion 20 is further elastically deformed, so that the engagement between the engagement portion 25 and the rear side end portion 8 b of the arm portion 8 is released. Then, the engagement between the engagement portion 25 and the rear end portion 8b of the arm portion is released, and the stopper member 6 that has lost the support force by the engagement support portion 20 rotates with its own weight as the pivot 16 as a fulcrum. The recumbent part 9 is rotated downward to prevent the book 15 from falling.

  In the disengagement between the engaging portion 25 and the rear end 8b of the arm portion 8 by the series of pendulum members 30, the rear end surface 8c of the arm rear end 8b and the inner wall 25b of the engaging recess 25a The frictional force existing between the rod-shaped part 31 and the engagement support part 20 is in a moving state after the initial contact, and is a dynamic frictional force having a lower coefficient of friction than static friction. Furthermore, the rod-shaped portion 31 works obliquely with respect to the engagement support portion 20 while being in sliding contact with the first taper portion 26, and instantaneous repulsion between the rod-shaped portion 31 and the engagement support portion 20 is suppressed. The contact time can be increased. Therefore, the engagement state between the rear end 8b of the arm portion 8 and the engagement portion 25 is gradually released, and as a result, even if the moving force of the rod-like portion 31 due to shaking such as an earthquake is relatively small, it is ensured. It will be possible to achieve a good fall prevention effect.

  Further, since the pendulum member 30 swings with respect to the back and forth and left and right swings due to the structure of the suspension support member 33, when the article storage shelf 2 vibrates in the left and right direction due to an earthquake or the like, FIG. As shown, the weight 32 is swung left and right, and swung so as to collide with the central portion of the engagement support portion 20 where the bar-shaped portion 31 of the pendulum member 30 intersects. Thereby, the engagement support part 20 is elastically deformed, and the engagement between the engagement part 25 and the rear side end part 8b of the arm part 8 is released.

  Further, since the engagement support portion 20 is engaged and disengaged from the left and right directions with respect to the stopper member 6 that moves up and down in the vertical direction, the vertical external force applied to the stopper member 6 is applied to the arm portion 8. The engagement between the rear side end portion 8b and the engagement support portion 20 is hardly affected. Therefore, even when an external force in the vertical direction is applied to the stopper member 6 due to a hand touching the recumbent portion 9 when an article is put in and out, the rear end portion 8b of the arm portion 8 and the engagement support portion The engagement with 20 is not released, and malfunction can be prevented.

  The case where the fall prevention device 1 is returned to the operation standby state will be described with reference to FIG. 8. As shown in FIGS. 8A and 8B, the administrator of the fall prevention device 1 drops downward after the operation. The recumbent portion 9 in a state of being pressed is once pushed up to a predetermined height and released. At a predetermined height, the rear end 8b of the arm portion 8 is guided by a third taper portion 27 provided on the rear end side of the engagement portion 25 and is fitted into the engagement portion recess 25a. The load is supported and returns to the standby state.

  Further, the engagement support portion 20 has one end side (front end portion 20a) fixed by a substantially L-shaped bent piece 14, and the arm portion rear side end portion of the stopper member 6 on the rear end side 20b. 8b has an engaging portion 25 that engages with the front end portion 20a and the rear end side 20b, and the abutment portion of the pendulum member 30 is provided between the front end portion 20a and the rear end side 20b. It can be effectively converted into a large movement on the 25 side, and the engagement between the engagement portion 25 and the rear side end portion 8b of the arm portion 8 can be reliably released.

  Further, as shown in FIG. 6A, the front upper boss shaft 12 of the support body 7 functions as a restricting portion that is restricted by the arm portion 8 that is pivoted downward. According to this, the recumbent part 9 is stabilized at a predetermined height position in front of the book 15 and lower than the upper end, and the book 15 can be prevented from jumping forward due to shaking such as an earthquake.

  Further, as shown in FIG. 3, the arm portion 8, the rod-like portion 31 of the pendulum member 30, and the engagement support portion 20 are formed in a thin plate shape, and the engagement portion 25 is set in the left-right direction (the width direction of the support body 7). ), The pendulum member 30 can be made thin and small to make the seismic response sensitive, and the supports 7 and 7 can be made thin and small. The storage amount of the book 15 is not pressed as much as possible.

  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 a weight as the seismic operation means has been described. However, the moving force acts obliquely with respect to the first taper portion 26 of the engagement support portion 20. If there is, the configuration is not limited. For example, a bottom surface may be provided in the support 7 and a weight having a bar-like portion above the bottom surface may be directly moved horizontally. An actuating piston may be used.

  Further, the moving force of the stopper member 6 is not limited to the load of the stopper member 6 but may be a biasing means such as a spring.

  Further, in the engaged state of the arm part 8 and the engaging part 25, the engagement support part 20 is designed to be orthogonal to the rear side end part 8b of the arm part 8, but this is not restrictive. 8 may be configured to be engaged and supported so as to intersect the engagement support portion 20 in an inclined state.

  Moreover, the engagement support part 20 is not restricted to the aspect fixed so that it may be substantially parallel to the shelf board 5, but may be fixed so that it may become a diagonal direction or an orthogonal direction with respect to the shelf board 5, for example.

  In addition, the engagement support portion 20 is not limited to one made of an elastically deformable synthetic resin, but can be moved on the engagement portion 25 side by being connected to a fixed portion side with the inner plate 7B by a spring hinge or the like. Alternatively, a bar-like member may be used instead of the plate-like shape. Furthermore, the engagement support portion 20 is not limited to the aspect of being fixed to the inner plate 7B, and may be fixed to the outer plate 7A or the shelf plate 5 side.

  Moreover, the rod-shaped part 31 in the pendulum member 30 is not limited to a thin plate shape, and may be a rod shape having a predetermined length.

  Further, in the embodiment, the engagement support portion 20 is provided with the first taper portion 26, and the moving force in the engagement portion direction X of the rod-shaped portion 31 in the pendulum member 30 causes the rod-shaped portion 31 and the first taper portion 26 to move. However, the present invention is not limited to this, but instead of providing the engagement support portion 20 with a taper, the rod-like portion 31 may be provided with a taper or engagement support. Both the portion 20 and the rod-shaped portion 31 may be tapered. Furthermore, it is good also as a structure which excluded the guide member 29 which has the 2nd taper part 29a by forming the 1st taper part 26 large in the width direction.

  Further, the arm portion 8 in the stopper member 6 is not limited to an integral shape, and for example, the rear end portion of the arm portion 8 may be formed by fixing a separate member. Furthermore, the engaged portion in the stopper member 6 is not limited to the arm portion rear side end portion 8b, and may be provided at any location in the stopper member 6.

  In addition, the recumbent portion 9 is configured to rotate so as to drop downward from above when the fall prevention function is activated. However, the present invention is not limited thereto, and the recumbent portion rises from below to above when the fall prevention function is activated. You may make it operate | move so that it may rotate.

  Moreover, the recumbent part 9 which prevents the fall of an article | item is not restricted to a rod-shaped member, For example, it is good also as a cover member which covers the front surface of each shelf 5 at the time of the operation | movement of a fall prevention function. Furthermore, the predetermined position (height etc.) after the operation of the recumbent part may be adjustable according to the shape such as the height of the article.

DESCRIPTION OF SYMBOLS 1 Seismic-type article fall prevention apparatus 2 Article storage shelf 3, 3 Side plate 4 Top plate 5 Shelf 6 Stopper member 7, 7 Support body 7A Outer plate 7B Inner plate 8 Arm portion 8b Arm portion rear side end (engaged portion )
8c Arm part rear side end rear end surface 9 Recumbent part 12 Boss shaft 14 Bending piece 14a Bending piece upper surface 15 Book 16 Pivot 20 Engagement support part 25 Engagement part 25a Engagement part recess 26 First taper part 29a Second taper Part 29 Guide member 30 Pendulum member (seismic operation means)
31 Rod-shaped part 32 Weight 33 Suspension support member X Engagement part direction Y Direction of force acting obliquely with respect to the engagement support part

Claims (6)

A stopper member provided so as to be able to ascend and descend between a predetermined position and an upper position that does not affect the loading and unloading of the article on the shelf in the vertical direction of the shelf, and to prevent the article on the shelf from falling at the predetermined position; ,
An engagement support portion that engages with the engaged portion of the stopper member from either the left or right side and restricts the movement;
Seismic operation means for moving the engagement support portion toward the other side in response to shaking of the shelf, and releasing the engagement state between the engaged portion of the stopper member and the engagement support portion; An earthquake-sensing article fall prevention device characterized by comprising:   2. The seismic-sensing article dropping according to claim 1, wherein the seismic-sensing operating means is movable back and forth or left and right in response to shaking of the shelf, and the engagement state is released by this movement. Prevention device.   A taper is provided on at least one of the engagement support part and the seismic operation means, and the moving force of the seismic operation means acts obliquely with respect to the engagement support part via the taper. The seismic article fall prevention device according to claim 1, wherein the engagement support portion and the seismic operation means are arranged.   The engaging support portion has a fixing portion on one end side thereof, an engaging portion that engages with an engaged portion of the stopper member on the other end side, and the fixing portion and the engaging portion, 4. The seismic-sensing article fall prevention device according to claim 3, wherein a contact portion of the seismic-sensing operating means is provided between the two.   The engagement support portion has a first taper portion at a contact portion of the seismic operation means, and a second taper portion that guides the seismic operation means in cooperation with the first taper portion includes the first taper portion. The seismic-sensing article fall prevention device according to claim 1, wherein the seismic-type article fall prevention device is disposed so as to face one taper portion.   The seismic sensing means includes a rod-shaped portion intersecting with the engagement support portion and a weight member provided at a lower end portion of the rod-shaped portion, and the rod-shaped portion is suspended at the upper end portion so as to be swingable back and forth and right and left. The seismic-sensing article fall prevention device according to any one of claims 1 to 5.

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