JP6496137B2 - Seismic-type article fall prevention device - Google Patents

Description

  The present invention relates to a seismic-sensing article fall prevention device that operates by sensing a vibration such as an earthquake and can prevent the fall of an article such as a book placed on a shelf of an article storage shelf such as a book shelf. .

  In an article storage shelf that stores articles such as foodstuffs in a warehouse, etc., to prevent articles from falling from the shelf due to earthquakes, etc., the regulating member is engaged and supported at a position that does not affect the loading and unloading of stored articles In addition, when a vibration is detected due to the occurrence of an earthquake or the like, the seismic sensitive article that can prevent the falling of the article by releasing the engagement support and moving to a predetermined position where the regulating member can prevent the falling of the article due to its own weight. Fall prevention devices are well known. For example, there is a seismic-type article fall prevention device as in Patent Document 1.

  A seismic-type article fall prevention device disclosed in Patent Document 1 includes a movable enclosure (stopper member) having a front enclosure that prevents an article from falling and a side enclosure provided in an arm shape on the front enclosure, and an article. And a fixing bracket (support) having a stopper installed at a predetermined position for preventing the fall of the movable body, and when moving seismically, the movable enclosure moved downward collides with the fixing bracket and stops at the predetermined position. It is like that.

JP-A-8-266353 (page 3, Fig. 1)

  However, in Patent Document 1, when the movable enclosure moves to a predetermined position, the movable enclosure collides with a stopper provided on the fixed bracket and rebounds, and a space is formed below the movable enclosure by the rebound. There is a possibility that the article slips through at the timing, and the fall of the article cannot be reliably prevented.

  The present invention has been made paying attention to such problems, and an object thereof is to provide a seismic-sensing article fall prevention device capable of reliably preventing the fall of articles against shaking such as an earthquake. To do.

In order to solve the above problems, the seismic-type article fall prevention device of the present invention is
A stopper member provided so as to be able to move up and down between an area where the article on the shelf can be taken in and out and a regulation area where the article on the shelf can be prevented from falling, and a pair of left and right supports which support the stopper member A seismic-type article fall prevention device comprising a body,
The stopper member has a front end projecting from the inside of the pair of left and right support members, and a pair of left and right arm portions that are pivotally supported by the support member, and is erected between the arm portions. A recumbent part,
The arm portion is supported by the support means in a state where the recumbent portion is located in the non-regulatory region, and the support by the support means is released by the seismic operation means arranged inside the support body. And
The support is formed with an opening that opens in the vertical direction by a left side plate and a right side plate from which the arm portion protrudes from the inside of the support,
The opening is not in sliding contact with the arm portion in a state in which the horizontal portion of the stopper member is positioned at the non-restriction region, the state where the horizontal portion of the stopper member is positioned in the regulating area The portion where the arm portion is located has a shape that tapers in a direction from the non-restricting region of the arm portion toward the restricting region,
The tapered opening portion slidably contacts with both side surfaces of the arm portion to form a slidable contact portion that suppresses the movement of the stopper member.
According to this feature, since the movement of the stopper member is suppressed by the resistance means in the restriction region, it is possible to prevent the article from falling down by preventing rebound due to the momentum of the movement of the stopper member.
The arm portion is a plate-like member.
The sliding contact portion is characterized in that the movement of the stopper member is suppressed by the arm portion moving from a non-regulating region above the opening to a restricting region below the tapered opening.

It is a front view of an article | item storage shelf provided with the seismic-type article | item fall prevention apparatus in an Example. It is a perspective view of a seismic-type article fall prevention device. It is a partially exploded perspective view which shows the structure of the outer side board (right side board) and inner side board (left side board) which comprise a support body. It is an enlarged front view of the sliding contact part in the operation standby state of the seismic-sensing article fall prevention device. It is a sectional side view in the operation standby state of a seismic-type article | item fall prevention apparatus. It is a figure which shows the time of movement of a stopper member by shaking, such as an earthquake, (a) is a figure showing the state where the regulation state of the coiled spring which supports a stopper member was canceled by shaking of the first movement, (b) FIG. 5 is a side cross-sectional view showing a state where the stopper member has reached a restriction region. (A) is a front view which shows the state which the stopper member stopped completely within the control area | region. (B) is side 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-sensing article fall prevention device according to the embodiment will be described with reference to FIGS. Hereinafter, the front side of FIG. 1 is the front side (front side) of the seismic article fall prevention device, and the left and right sides of the seismic article fall prevention device are the left and right sides of the seismic article fall prevention device. Will be described.

  As shown in FIG. 1, 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 includes three support columns 3, 3, and 3 spaced apart from each other left and right. , Which are connected to the opposite surfaces of the upper and lower ends of the columns 3, 3 and 3 which are adjacent to each other, and supported by the front surfaces of the columns 3, 3, and 3 which are adjacent to each other. Are mainly composed of upper and lower shelves 5, 5,..., And a plurality of books 6, 6,.

  A large number of engagement holes 7, 7,... Arranged in a line in the vertical direction are provided on the front surfaces of the right and left support columns 3, 3, and a large number of two columns in the vertical direction are provided on the front surface of the central support column 3. .. Are provided. Further, each shelf plate 5 is fixed to a bracket (not shown) having a hook at the rear end, and by engaging the hook of the bracket with the engagement holes 7, 7,. 3 is supported in a cantilevered state.

  As shown in FIG. 2, the fall prevention device 1 is mainly composed of a pair of left and right supports 8, 8 and a stopper member 9, and the stopper member 9 is outside the inside of both supports 8. A pair of left and right arm portions 10 and 10 projecting from the front end portion, and a lateral flange portion 11 having both ends fixed to opposite surfaces of the front end portions of both arm portions 10 are provided. In the following description, since the pair of left and right supports 8 and 8 have the same structure, the support 8 on the left side of the screen in FIG. 2 will be described, and the description of the other support 8 will be omitted.

  As shown in FIGS. 3 to 5, the support 8 is composed of an outer plate 30 (left side plate) and an inner plate 31 (right side plate) formed of synthetic resin. 31 is opposed to each other, and the retaining holes 32a and 33a, the retaining holes 32b and 33b, and the retaining holes 32c and 33c are brought close to each other by a plurality of screws 40, 40 and 40, respectively. A thin box-shaped support 8 is formed while providing a required space between the opposing surfaces of the inner plate 31 and the inner plate 31. In addition, a hook 13 is provided at the rear end portion of the support body 8, and the hook 13 is engaged with arbitrary engagement holes 7, 7,... (See FIG. 1) above the shelf board 5. The fall prevention device 1 can be attached to the columns 3 and 3 via the support 8.

  The outer plate 30 is formed of a substantially rectangular main surface 30a extending in the front-rear direction and four ribs 30b, 30c, 30d, and 30e rising perpendicularly from the main surface 30a. Of these ribs, the front rib 30b is partially formed with a notch 30f from the substantially central upper end side to the substantially central lower end side. Similarly, the inner plate 31 is also formed of a substantially rectangular main surface 31a extending in the front-rear direction and four ribs 31b, 31c, 31d, 31e rising perpendicularly from the main surface 31a, and among these ribs, the front rib 31b is formed. A cutout portion 31f is formed in part from the substantially center upper end side to the substantially center lower end side. And the slit part 15 which is an opening part is formed by the said notch parts 30f and 31f because these outer side board 30 and the inner side board 31 are match | combined. The slit portion 15 is formed in a tapered shape in which the lower side in the vertical direction is gradually narrowed toward the lower end side.

  The above-mentioned upper position is in a region where the books 6, 6,... Can be taken in / out of the books 6, 6,. In the present embodiment, the uppermost point of the movable range of the recumbent portion 11 is indicated. Further, the region where the books 6, 6,... Can be taken in and out is the highest point in the movable range of the recumbent portion 11 from the position where the recumbent portion 11 is arranged at a predetermined height that does not hinder the taking in and out of the books Refers to the range. The upper position may be an arbitrary position as long as it is included in the area that can be taken in and out.

  In addition, the above-described lower position is included in a regulation region in which the loading of the books 6, 6,... On the shelf board 5 can be prevented by the horizontal flange portion 11 of the stopper member 9. Points to the lowest point of the buttock 11. Further, the restriction region refers to a range from a position where the recumbent portion 11 is disposed at a predetermined height at which the books 6, 6,... Can be prevented from being taken in and out to the lowest point of the movable range of the recumbent portion 11. The lower position may be an arbitrary position as long as it is included in the restriction region.

  Next, the internal structure of the support body 8 will be described with reference to FIG. A fixed portion 17 is fixed to the upper rear side of the support 8, and a winding spring 18 that restricts the rotation of the stopper member 9 spans between the fixed portion 17 and the longitudinal end portion 10 a of the arm portion 10. Has been placed. The fixing portion 17 and the winding spring 18 are installed so as to be inclined with respect to the horizontal direction when the fall prevention device 1 is installed. That is, the rotational force around the pivot 16 of the arm portion 10 is supported by the fixing portion 17 via the winding spring 18 while being inclined with respect to the horizontal direction during normal times.

  In the normal state, the winding spring 18 is configured such that the wire forming the winding spring 18 has a cylindrical shape with no gap. Therefore, the load of the stopper member 9 can be stably supported by the wide cylindrical cross section of the winding spring 18.

  Further, the longitudinal end portion 10a of the arm portion 10 is provided with an auxiliary hook portion 19 in which the other end side of the winding spring 18 is fitted to a predetermined length, and in a state where the arm portion 10 is in a normal position, the fixed portion 17 and the auxiliary hook part 19 are designed so that it may become substantially parallel. The winding spring 18 is fitted to the fixing portion 17 and the auxiliary flange portion 19 to prevent loosening of both end portions of the winding spring 18 in a normal state in the self-weight direction.

  A rotation center shaft 21 is provided on the rear side of the arm portion 10, and the pendulum member 20 is pivotally supported by the rotation center shaft 21. The pendulum member 20 is mainly composed of a rod-like portion 22 extending in the vertical direction and a weight portion 23 fixed to the lower end of the rod-like portion 22. A restriction release unit 24 for releasing the restriction state by 18 is provided.

  The pendulum member 20 is pivotally supported by the support 8 via a rotation center shaft 21 at the center in the longitudinal direction of the rod-shaped portion 22 and can swing in the front-rear direction using the rotation center shaft 21 as a fulcrum. In normal times, it hangs vertically due to its own weight.

  Next, the operation when the fall prevention device 1 senses vibration will be described. When the article storage shelf 2 is vibrated in the front-rear direction due to an earthquake or the like, the pendulum member 20 that is a seismic operation means is swung around the rotation center shaft 21 and the weight portion 23 of the pendulum member 20 is swung in the front-rear direction. Moved.

  As shown in FIG. 6A, when the weight portion 23 is swung in the rear direction, the restriction release portion 24 of the pendulum member 20 is moved in the forward direction, which is the opposite direction to the weight portion 23, and Due to the forward movement, the parallel surface 24 a of the restriction release portion 24 collides with the winding spring 18. Thereby, the regulation release part 24 loses the regulation function of the winding spring 18, and the horizontal flange part 11 of the stopper member 9 moves to the lower position side. As described above, the pendulum member 20 functions as a seismic operation means that is swung to release the restricted state of the winding spring 18 by detecting a vibration such as an earthquake.

  As shown in FIG. 6 (b), when the restricted state by the winding spring 18 is released, the arm portion 10 is rotated downward with the pivot 16 as a fulcrum by the weight of the stopper member 9, and accordingly, Part 11 is also moved.

  Further, the restriction release portion 24 has a parallel surface 24 a parallel to the winding spring 18 disposed at an inclination, and the parallel surface 24 a comes into contact with the winding spring 18 in a normal state. Therefore, when a vibration is applied to the article shelf 2, the parallel surface 24 a of the restriction release portion 24 restricts the bending or refraction direction of the winding spring 18, so that the winding spring 18 is always bent or only in a specific direction. Since it can be refracted, interference with each member of the winding spring 18 can be prevented, and the stopper member 9 can be moved to prevent the books 6, 6,.

  As described above, the slit portion 15 is formed in a tapered shape in which the lower side in the vertical direction gradually narrows toward the lower end side, and the upper and lower central portion (that is, the starting point of the tapered shape) α1 of the slit portion 15 is The width is wider than the thickness of the central portion of the arm portion 10.

  In the arm portion 10 that has started to rotate toward the regulating region due to the weight of the stopper member 9, both side surfaces 10 c and 10 d of the central portion 10 b in the longitudinal direction form the vicinity of the vertical center portion α 1 of the slit portion 15, that is, the slit portion 15. The inner surface 300 of the rib 30b of the outer side plate 30 starts to slidably contact with the vicinity of the center in the vertical direction of the inner side surface 310 of the inner surface 310 of the rib 31b of the inner side plate 31.

  As described above, the arm portion 10 is rotated while being in sliding contact with the slit portion 15, so that the side surface 10c of the arm portion longitudinal direction central portion 10b, the inner surface 140c of the rib 30b of the outer plate 30, and the arm portion longitudinal direction center. A frictional resistance is generated between the side surface 10 c of the portion 10 b and the inner side surface 310 of the rib 31 b of the inner plate 31. At this time, since the slit portion 15 has a tapered shape in which the lower side in the vertical direction gradually narrows toward the lower end side, the frictional resistance generated between the arm portion 10 and the slit portion 15 gradually increases. Accordingly, the rotation speed of the arm portion 10 is gradually suppressed, and the arm portion 10 is completely stopped near the lower end α2 of the slit portion 15 (see FIGS. 7A and 7B). .

  In the present embodiment, when the arm portion 10 is positioned at the upper and lower central portion α1 of the slit portion 15, the recumbent portion 11 is positioned substantially at a predetermined height that can prevent the books 6, 6,. The lower end α2 of the slit portion 15 is the lowest point of the movable range of the arm portion 10 (that is, the lowest movable point of the horizontal flange portion 11), and the region between the upper and lower central portion α1 and the lower end α2 is It functions as a slidable contact portion that is a resistance means that suppresses the movement of the stopper member, and at the same time serves as the restriction region described above.

  As described above, the slit portion 15 is in sliding contact with the arm portion 10 to suppress the falling moment of the stopper member 9 to prevent the rebound, and when the seismic operation is performed, the recumbent portion 11 is reliably positioned in the restriction region, It is possible to prevent the books 6, 6,. Further, it is possible to eliminate or reduce the sound of the arm portion 10 colliding with the lower end α2 of the slit portion 15.

  Further, the outer plate 30 and the inner plate 31 are fixed by the fastening holes 32b and 33b arranged near the lower end α2 of the slit portion 15 in the outer plate 30 and the inner plate 31 being brought close to each other by the screw 40. As the sliding contact portion of the slit portion 15 is closer to the tapered lower end α2 side, the frictional resistance becomes higher, and the rotation of the arm portion 10 can be reliably stopped on the lower end α2 side.

  Further, the sliding contact portion of the slit portion 15 is provided at the front end of the support 8 and acts on the central portion in the longitudinal direction of the arm portion 10, so that, for example, on the rotation fulcrum side of the arm portion 10. Compared with the case where the sliding contact portion is provided, the sliding region can be made longer, and it is possible to easily realize a configuration in which the turning force of the arm portion 10 is gradually suppressed with a small frictional force, that is, gently.

  In addition, the arm portion 10 and the slit portion 15 are in sliding contact between the upper and lower central portions α1 and the lower end α2 of the slit portion 15 that overlaps the restriction region in the movable range of the arm portion 10, and the slit portion 15 that overlaps the non-restriction region Since the arm portion 10 is not in sliding contact with the slit portion 15, the movement speed of the stopper member 9 does not decrease outside the restriction region in the movable range of the arm portion 10 (in other words, the region in which the article can be taken in and out). It can be moved instantaneously within the restricted area.

  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 aspect in which the stopper member 9 is rotated from the upper position toward the lower position has been described. However, the present invention is not limited thereto, and the stopper member 9 is moved from the lower position to the upper position by using the biasing means. It may be a mode of turning toward the front. Further, the movement mode of the stopper member 9 is not limited to the rotation having the rotation axis, and may be, for example, the vertical movement guided by the groove formed in the vertical direction.

  Further, the outer plate 30 and the inner plate 31 constituting the support 8 are made of synthetic resin, and a frictional force is generated by sliding the outer plate 30 and the inner plate 31 themselves to the stopper member 9 as sliding portions. Although it demonstrated by the structure, it is not restricted to this, For example, the structure attached to the support body 8 so that attachment or detachment is possible may be sufficient as the separate member slidably contacting with the stopper member 9.

  In addition, the sliding contact portion of the above embodiment is provided in the slit portion 15, but may be formed in any part of the support body 8 as long as it is a range that is a restriction region of the stopper member 9, and the outer plate. 30 and at least one of the inner plate 31 may be formed.

  Further, the slit portion 15 is not limited to the tapered shape that gradually narrows only on the lower side as in the above-described embodiment, and may be a tapered shape that gradually narrows from the upper end portion to the entire lower end portion, for example.

  Further, the resistance means is not limited to the one that is directly slidably contacted with the stopper 9. For example, a gear is provided on the stopper member 9, and a rotary damper that engages within the restriction region is disposed on the support body 8 side. It is good also as a structure which suppresses this moving speed within a control area | region.

  Further, the winding spring 18 is not necessarily limited to the configuration in which the winding spring 18 is installed to be inclined with respect to the support body 8, and may be installed vertically, for example.

  Moreover, the recumbent part 11 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 board 5 at the time of operation | movement of a fall prevention function. Furthermore, the predetermined position (height etc.) after the operation of the recumbent part 11 may be adjustable according to the shape such as the height of the article.

  Further, in the above-described embodiment, the winding spring 18 has been described in a mode of using a spring in which the wire members constituting the winding spring 18 are in contact with each other in the vertical direction while receiving the load of the arm portion 10. Not only this but the spring which the wire rod which comprises the winding spring 18 has spaced apart may be used in the state which has received the load of the arm part 10. Furthermore, the winding spring 18 is not limited to a spiral spring, and may be formed by winding a wire rod into a triangular shape such as a triangle or a square. The winding spring 18 may be either a compression coil spring or a tension coil spring.

  Furthermore, the winding spring 18 that supports the stopper member 9 supports the stopper member 9 in a fixed manner with respect to the vector of the moving force applied to the stopper member 9, and is specific to the vector of the moving force. The structure is not limited to the above-described winding spring 18 as long as the moving force vector is divided in different directions by the force applied from the direction.

  In addition, as long as the restriction release portion 24 in the pendulum member 20 collides with the winding spring 18 from a specific direction, the configuration is not limited to the collision with the rear side of the winding spring 18, for example, from the front side of the winding spring 18. The pendulum member 20 may be disposed so as to collide.

DESCRIPTION OF SYMBOLS 1 Seismic-type article fall prevention apparatus 2 Article storage shelf 3 Support | pillar 4 Lateral connection rod 5 Shelves
6 Book 7 Engagement hole 8, 8 Support body 9 Stopper member 10 Arm portion 10a Arm portion longitudinal end portion 10b Arm portion longitudinal direction center portion 10c, 10d Arm portion side surface 11 Recumbent portion 12 Bolt / nut 13 Hook 15 Slit portion (Sliding contact / resistance means)
16 Pivot 17 Fixing part 18 Winding spring 19 Auxiliary hook part 20 Pendulum member 21 Pivot center shaft 22 Bar-like part 23 Weight part 24 Restriction release part 24a Parallel surface 30 Outer plate (left side plate)
31 Inner plate (right side plate)
300 Inner surface 310 of the rib of the outer plate Inner surface α1 of the rib of the inner plate The highest point α2 of the sliding contact portion

Claims (3)

A stopper member provided so as to be able to move up and down between an area where the article on the shelf can be taken in and out and a regulation area where the article on the shelf can be prevented from falling, and a pair of left and right supports which support the stopper member A seismic-type article fall prevention device comprising a body,
The stopper member has a front end projecting from the inside of the pair of left and right support members, and a pair of left and right arm portions that are pivotally supported by the support member, and is erected between the arm portions. A recumbent part,
The arm portion is supported by the support means in a state where the recumbent portion is located in the non-regulatory region, and the support by the support means is released by the seismic operation means arranged inside the support body. And
The support is formed with an opening that opens in the vertical direction by a left side plate and a right side plate from which the arm portion protrudes from the inside of the support,
The opening is not in sliding contact with the arm portion in a state in which the horizontal portion of the stopper member is positioned at the non-restriction region, the state where the horizontal portion of the stopper member is positioned in the regulating area The portion where the arm portion is located has a shape that tapers in a direction from the non-restricting region of the arm portion toward the restricting region,
The taper-opening portion constitutes a slidable contact portion that slidably contacts with both side surfaces of the arm portion and suppresses the movement of the stopper member. The seismic article fall prevention device according to claim 1, wherein the arm portion is a plate-like member . The sliding contact portion suppresses movement of the stopper member by the arm portion moving from a non-restricting region above the opening to a restriction region below the tapered opening. Item 3. The seismic article fall prevention device according to Item 1 or 2.

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