JP2016007351A - Article falling prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an article falling prevention device capable of reliably regulating fall of articles.SOLUTION: The article falling prevention device includes: an arm part 10 having one end 10a rotationally journaled, and a stopper member 11 connected to the other end 10b of the arm part 10 and vertically swinging a front end of a shelf 5 by rotation of the arm part 10. The stopper member 11 includes sliding regulation means that regulates sliding relative to an article at least at a contact part 11a with the article in the stopper member 11.

Description

  The present invention relates to an article fall prevention device that regulates the fall of articles on a shelf.

  In article shelves that store food items in warehouses, etc., a regulating member that extends to the left and right is placed at the front end of the shelf, and the article is prevented from falling from the shelf due to vibrations such as an earthquake by the regulating member. The device is known.

  For example, in an article drop prevention device such as Patent Document 1, an inclined plate (arm) attached to a pair of boxes arranged on the left and right sides of a shelf so as to be rotatable by a pivot shaft (rotary shaft). Each of which is provided with a horizontal bar (stopper member) spanning the left and right inclined plates. This horizontal bar is located at a lower position that does not affect the loading and unloading of shelf items under normal conditions, and when an earthquake or the like occurs, each inclined plate can be rotated to regulate the falling of the shelf items It is arranged at an upper position.

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

  However, in Patent Document 1, the horizontal bar arranged at the upper position is arranged above the pivot shaft, and the article moved forward due to an earthquake or the like comes into contact with the horizontal bar. When the article slides against the horizontal bar, the force that rotates the horizontal bar toward the lower position works against the inclined plate, and the article rides on the horizontal bar and falls off the shelf. There was something to do.

  The present invention has been made paying attention to such problems, and an object of the present invention is to provide an article fall prevention device that can reliably regulate the fall of articles.

In order to solve the above problems, the article fall prevention device of the present invention is
An article drop comprising: an arm portion pivotally supported at one end side, and a stopper member connected to the other end side of the arm portion and swinging the front end portion of the shelf up and down by the rotation of the arm portion Prevention device,
The stopper member is characterized in that sliding restriction means for restricting relative sliding with the article is provided at least at a contact portion of the stopper member with the article.
According to this feature, the sliding restriction means provided at the contact portion of the stopper member does not cause a relative slip between the stopper member and the article. The state in which the member restricts the dropping of the article can be reliably maintained.

The sliding restricting means is a friction member.
According to this feature, when the article abuts on the abutting portion of the stopper member, the relative sliding between the recumbent portion and the article can be regulated by the friction member.

The stopper member is characterized in that at least the contact portion is substantially flat.
According to this feature, the relative slip between the stopper member and the article can be restricted by increasing the contact area between the contact portion and the article.

It is a front view which shows the bookshelf to which the article | item fall prevention apparatus was attached. It is a perspective view which shows an article fall prevention apparatus. It is a sectional side view which shows the raising / lowering movement of a stopper member. It is a sectional side view which shows the state which the book moved ahead by shaking, such as an earthquake. It is a sectional side view which shows the state which the book moved ahead with the bigger force than the state of FIG.

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

  An article drop prevention device according to an embodiment will be described with reference to FIGS. 1 to 5. Hereinafter, the left side of the screen in FIG. 3 will be described as the front side (front side) of the article fall prevention device, and the left and right sides as viewed from the front side of the article fall prevention device will be described as the left and right sides of the article fall prevention device.

  As shown in FIG. 1, in a library or the like, a bookshelf 2 that houses books 20, 20,. The bookshelf 2 is composed of three columns 3, 3 and 3 which are separated from each other on the left and right sides, and horizontal connecting rods 4, which connect the opposing surfaces of the upper and lower ends of the columns 3, 3 and 3 adjacent to each other. Are composed mainly of upper and lower shelf boards 5, 5,... Supported on the front surfaces of the columns 3, 3, 3 adjacent to each other.

  A large number of engaging holes 6, 6,... Arranged in a line in the vertical direction are provided on the front surfaces of the left and right support columns 3, 3, and a large number of left and right columns in the vertical direction are provided on the front surface of the central support column 3. .. Are provided. As will be described later, one of the article drop prevention devices 1 is utilized by using the engagement holes 6, 6,... On the front surfaces of the columns 3, 3, which are adjacent to each other at positions corresponding to the shelf plates 5, 5,. The support bodies 7 which comprise a part are attached.

  As shown in FIG. 2, the article fall prevention device 1 includes a pair of left and right supports 7, 7, a fall preventer 8 attached to both supports 7, 7, and a tension coil spring 9 as an urging means. , 9 and so on. The left and right supports 7, 7 are box-shaped bodies having a space inside, and slits 13, 13 are provided on the front side. Further, hooks 14, 14,... Are provided at the rear end portion of the support body 7, and the hooks 14, 14,... Are engaged with the engagement holes 6, 6,. Thus, the article drop prevention device 1 is mounted on the support columns 3 and 3 via the supports 7 and 7.

  As shown in FIGS. 2 and 3, the fall prevention device 8 includes a pair of left and right support arms 10 and 10 (arm portions) with front end portions 10 b and 10 b protruding from the insides of both supports 7 and 7. The stopper member 11 is fixed so as to be unrotatable across the front end portions 10b and 10b of the support arms 10 and 10. A friction member 18 made of rubber or the like having a slight elasticity is fixed to the outer peripheral surface of the stopper member 11.

  As shown in FIGS. 2 and 3, the support arm 10 has a rear end portion 10 a pivotally supported by a rotation shaft 12 with respect to the outer plate portion 7 a of the support 7. The stopper member 11 is moved between the upper restriction position indicated by the solid line in FIG. 2 and the lower position indicated by the one-dot chain line in FIG. The front end side can be moved up and down. The restricting position refers to the highest point in the movable range of the stopper member 11 and is a position where the stopper member 11 can prevent the books 20, 20,. Indicates the lowest point in the movable range of the stopper member 11, and is a position where the books 20, 20,.

  Further, the support arm 10 has a meshing portion 10 c in which the outer peripheral edge of the rear end portion 10 a is formed in a gear shape, and a hydraulic rotary damper 15 is provided on the outer plate portion 7 a of the support body 7. ing. The rotary damper 15 includes a meshed portion 15a that meshes with the meshing portion 10c of the support arm 10, and by applying resistance to the meshing portion 10c of the support arm 10 via the meshed portion 15a, The rotational torque is attenuated. Thereby, it is easy to adjust the rotation speed of the support arm 10.

  As shown in FIGS. 2 and 3, one end of the tension coil spring 9 is fixed to a through hole 16 provided at a predetermined position of the support arm 10, and the other end is an outer plate portion of the support body 7. It is fixed to a fixing pin 17 provided on the rear end upper side than the rotating shaft 12 in 7a. Further, the tension of the tension coil springs 9 and 9 is larger than the descending force due to the weight of the fall prevention tool 8. According to this, the supporting arms 10 and 10 are in a state in which the urging force is always applied upward by the tension coil springs 9 and 9 and the returning force is applied so that the stopper member 11 returns to the restriction position. .

Next, an aspect when the book 20 is moved forward due to actual shaking such as an earthquake will be described.
As shown in FIG. 4, the stopper member 11 is disposed at the restriction position in a normal state, and when the book 20 moves forward due to shaking such as an earthquake, the book 20 contacts the friction member 18. Get in touch. At this time, the contact portion 18a of the friction member 18 with the book 20 is in contact with the predetermined point A of the book 20 in a sectional view.

  As described above, since the friction member 18 is fixed to the outer peripheral surface of the stopper member 11, the frictional force suppresses the occurrence of relative slip between the friction member 18 and the book 20, and the stopper member 11 It can be prevented from descending. Therefore, the state in which the book 20 is prevented from dropping is reliably maintained while the stopper member 11 is positioned above the rotation shaft 12. As described above, the friction member 18 functions as a sliding restricting unit that restricts sliding with the book 20.

  Further, the stopper member 11 is fixed so as not to rotate over the front end portions 10b and 10b of the support arms 10 and 10, and since the friction member 18 is fixed to the outer peripheral surface of the stopper member 11, the stopper member 11 is fixed. In addition, the friction member 18 is prevented from rotating due to the contact with the book 20, and the sliding regulation state between the friction member 18 and the book 20 is maintained.

  Moreover, since the impact by contact with the book 20 can be relieved by the elastic force of the friction member 18, damage to the book 20 can be prevented.

Next, an aspect when the book 20 moves forward with a force larger than the state shown in FIG. 4 will be described.
As shown in FIG. 5, when the book 20 moves with a force larger than the frictional force when the contact portion 18 a of the friction member 18 is in contact with the predetermined point A of the book 20, Then, the friction member 18 and the book 20 come to slide, and the stopper member 11 is slightly lowered downward.

  As described above, since the friction member 18 is slightly elastic, when the stopper member 11 is slightly lowered, the friction member 18 is elastically deformed by sliding with the book 20, and the friction member 18. The contact portion 18a ′ with the book 20 comes into contact with the book 20 in a range from the predetermined point A to the predetermined point B in the cross-sectional view. Therefore, the contact area between the contact portion 18a ′ and the book 20 is increased, the frictional force is further increased, the relative sliding between the stopper member 11 and the book 20 is reliably regulated, and the fall of the book 20 is regulated. Is preserved.

  In the above embodiment, the sliding restricting means is described as the friction member 18 fixed to the outer peripheral surface of the stopper member 11. However, the present invention is not limited to this. For example, the friction member is not particularly provided and the contact portion of the stopper member is provided. May be formed in a substantially planar shape to increase the frictional force by increasing the contact area between the contact portion and the book 20, thereby restricting relative sliding. Further, for example, the contact area with the book 20 may be increased by using a stopper member having an elliptical shape or a rectangular shape in a side sectional view. Note that a friction member may be fixed to the substantially planar contact portion, or a substantially planar portion may be formed on the friction member, and the substantially planar portion of the friction member may be used as the contact portion. .

  Further, a film having a high coefficient of friction is formed as a sliding restricting means by spraying or the like on the contact portion of the stopper member, and the book 20 is brought into contact with the film so that the stopper member and the book 20 are relative to each other. You may make it regulate a slip. Thus, the sliding restricting means is not limited to being provided on the entire stopper member, and may be provided only on the contact portion.

  Moreover, in the said Example, although the stopper member 11 came to raise / lower between the control position above the rotating shaft 12, and the lower position below the rotating shaft 12, this, For example, the lower side of the rotation axis is a restriction position, and the upper side of the rotation axis is an upper position where the books 20, 20,. The stopper member may be moved up and down between the restriction position and the upper position. In this aspect, when the book 20 comes into contact with the friction member of the stopper member arranged at the restriction position, the frictional force of the friction member suppresses the occurrence of relative slip between the stopper member and the book. It is possible to prevent the member from rising.

  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 article storage shelf is described as the bookshelf 2 that stores the books 20, 20,..., But is not limited thereto, and may be a display shelf that displays food and beverages, for example.

  Moreover, in the said Example, although the friction member 18 was fixed to the outer peripheral surface of the stopper member 11, for example, a stopper member may be formed with the material with a high friction coefficient.

1 Article fall prevention device 2 Bookcase 5 Shelf (shelf)
7 Support body 8 Fall prevention tool 9 Tension coil spring (biasing means)
10 Support arm (arm part)
11 Stopper member (sliding restriction member, friction member)
12 Rotating shaft 18 Friction member 18a, 18a 'Contact part 20 Book (article)

Claims (3)

An article drop comprising: an arm portion pivotally supported at one end side, and a stopper member connected to the other end side of the arm portion and swinging the front end portion of the shelf up and down by the rotation of the arm portion Prevention device,
The article fall prevention device, wherein the stopper member is provided with a sliding regulating means for regulating relative sliding with the article at least at a contact portion of the stopper member with the article.   The article fall prevention device according to claim 1, wherein the sliding restriction means is a friction member.   The article dropping prevention device according to claim 1, wherein at least the contact portion of the stopper member is substantially flat.

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