JP2019088429A - Vibration control structure for bookshelf - Google Patents

Abstract

To provide a vibration control structure for a bookshelf capable of absorbing and reducing earthquake vibration from a floor surface with a simple structure, while fixing the bookshelf by an anchor bolt.SOLUTION: A vibration control structure for a bookshelf has a U-shaped metal fitting 20 for sandwiching a side plate 11 of the bookshelf 10 from the bottom side, a fitting bolt 21 penetrating the side face 20b of the U-shaped metal fitting, for fixing the U-shaped metal fitting 20 to the side plate 11, a first elastic member 31 sandwiched between the bottom surface 20a of the U-shaped metal fitting and the side plate 11, and an anchor bolt 22 penetrating the bottom surface 20a of the U-shaped metal fitting, and fixed to the floor surface.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vibration control structure for a bookshelf that adds damping properties to the bookshelf.

  The bookshelf installed in the library is larger in size than the bookshelf for general household use, and the number of stored books is also large. For example, a typical library shelf has a structure in which five to seven stages of spaces having a width of 900 mm, a depth of 210 mm, and a height of 275 mm are arranged in one row and connected continuously. When such library library racks collapse due to an earthquake, a large number of books fall and damage becomes serious, and recovery takes time.

  Therefore, a seismic isolation system may be provided on the bookshelf as a countermeasure against earthquakes (see, for example, Patent Document 1). FIG. 5: is an example of the seismic isolation apparatus which can be installed in a bookshelf, (a) is a top view, (b) is a front view. In such a seismic isolation device 100, the weight of the mounting table 120 and the book rack placed thereon is shared by the cross-type slide 130 generating return force in two directions orthogonal to each other, and the rolling support means 121 consisting of wheels and the like. Since it can be supported, the strength against the load of the cross-shaped slide 130 can be lowered, and an excellent seismic isolation effect can be exhibited.

  Although it is described in patent document 1 that it can be manufactured cheaply if it is a seismic isolation device of such a structure, since the seismic isolation device itself is a complicated structure, it is expensive compared with the simple earthquake countermeasure Furthermore, in the case where a large number of bookshelves are lined up like a library, since the number of installed books increases, it will cost a large amount as a whole. Therefore, it is desirable to provide an earthquake countermeasure that can exhibit the same effect as such a seismic isolation device while being inexpensive.

  In the library, the bookshelf may be fixed to the floor with anchor bolts to take measures against earthquakes. However, in that case, since the earthquake motion from the floor surface is directly transmitted to the bookshelf and the stored books are not fixed, there is a high possibility that the books will fall from a high level. In particular, when the direction of the earthquake motion is the depth direction of the bookcase, the vibration is transmitted to the book from the back plate installed on the back side of the shelf board, and the book is more dropped.

  In addition, by placing an elastic member between the bookcase and the floor surface, it is possible to take measures against earthquakes to reduce the transmission of earthquake motion to the bookcase, but in that case the bookcase stability due to deformation or deterioration of the elastic member. There is a problem that the nature is easily lost.

Patent No. 4936903

  In view of the above circumstances, the present invention has an object of providing a vibration control structure for a bookshelf that absorbs and reduces earthquake motion from a floor surface while having a simple structure while fixing a bookshelf with anchor bolts. There is.

  In order to achieve the above object, the vibration control structure for a bookshelf of the present invention penetrates the U-shaped bracket sandwiching the side plate of the bookshelf from the bottom side and the side of the U-shaped bracket and fixes the U-shaped bracket to the side plate Mounting bolts, a first elastic member sandwiched between the bottom surface of the U-shaped bracket and the side plate of the book rack, and an anchor bolt penetrating the bottom surface of the U-shaped bracket and fixed to the floor surface , And.

  Furthermore, it has a second elastic member sandwiched between the side surface of the side plate and the U-shaped bracket, or has a height adjusting material between the U-shaped bracket and the floor surface, and adjusts its height The anchor bolt may pass through the material.

  According to the vibration control structure for a bookcase of the present invention, the elastic member can be easily attached between the U-shaped bracket and the side plate while fixing the bookcase with the anchor bolt, and furthermore, the deformation amount of the elastic member can be U-shaped. Since it is possible to limit by a metal fitting, an effect that a damping structure can be added in a stable state and easily can be obtained. Furthermore, the height adjustment material can be safely installed by the anchor bolt penetrating the height adjustment material.

It is the whole perspective view which provided the vibration control structure for bookshelf of this invention in the bookshelf. It is a perspective view of a U-type metal fitting. It is sectional drawing of the vibration control structure for book racks of this invention. It is a side view of the vibration control structure for book racks of this invention. It is an example of the seismic isolation apparatus which can be installed in a bookshelf, (a) is a top view, (b) is a front view.

  Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

  FIG. 1 is an overall perspective view of a bookshelf provided with a damping structure for a bookshelf according to the present invention. The shelf board 13 is removed from the left side of the bookshelf 10, and the shelf board 13 is attached to the right side.

  The basic structure of the bookcase 10 is composed of a side plate 11, a frame 12, a shelf plate 13 and a back plate 14. The material of the side plate 11, the frame 12 and the shelf plate 13 is not particularly limited, such as steel or wood. For example, the frame 12 and the shelf plate 13 may be steel and the side plate 11 may be wooden.

  The side plate 11 is a plate material erected vertically in a direction in which the book to be stored is sandwiched from the left and right direction, and serves as a column. Adjacent side plates 11 are connected by a frame 12, and when viewed from above, the frame 12 is connected to the side plate 11 at a right angle. That is, since the frame 12 and the side plate 11 are H-shaped or U-shaped when viewed from above, they can stand independently as a whole. FIG. 1 is a diagram of an H shape, and in the bookshelf 10 for a library, there are many H shapes.

  The frame 12 is a rectangular frame material having two sides in the vertical direction and two sides in the horizontal direction. Two sides in the vertical direction of the frame 12 are coupled to the side plate 11 along the center of the side plate 11, and two sides in the horizontal direction connect the adjacent side plates 11 on the upper side and the lower side of the side plate 11, respectively. There is.

  The shelf board 13 is installed in a space surrounded by three sides by the frame 12 and the two side plates 11 and 11 when viewed from above. That is, in the case of the H-shaped bookshelf 10, the shelf board 13 is installed symmetrically with the frame 12 as a boundary when viewed from above.

  The back plate 14 is a plate-like member attached to the inside of the quadrangle formed by the four sides of the frame 12. The back plate 14 is provided on the back side of the shelf plate 13 and prevents a book from falling behind the shelf plate 13 and serves as a partition between the shelves. That is, when the shelf board 13 is provided symmetrically with respect to the frame 12, it is between the symmetrical shelf boards 13 and partitions the front and back shelves. In addition, since a book may collide with the backplate 14 when an earthquake generate | occur | produces, the material of the backplate 14 is desirable light and strong. Moreover, it is also possible to use the backplate 14 as a damping member by connecting the flame | frame 12 and the backplate 14 with the damper which consists of spring materials.

  The vibration control structure for a bookshelf according to the present invention is provided between the bookshelf 10 having the above-described structure and a floor surface to absorb and reduce earthquake motion from the floor surface easily and safely.

  The U-shaped fitting 20 is attached to the bottom surface of the side plate 11 of FIG. 1, and FIG. 2 is a perspective view of the U-shaped fitting. FIG. 3 is a cross-sectional view of the vibration control structure for a bookshelf of the present invention, and FIG. 4 is a side view of the vibration control structure for a bookshelf of the present invention.

  The U-shaped bracket 20 is a member having a U-shaped cross section formed by bending a metal plate, and includes a bottom surface 20a of the U-shaped bracket and side surfaces 20b of two U-shaped brackets. The U-shaped fitting 20 is mounted so as to sandwich the side plate 11 from the bottom side as shown in FIG. A mounting bolt hole 20c is formed in the side surface 20b of the U-shaped fitting for passing the mounting bolt 21 for fixing the U-shaped fitting 20 to the side plate 11, and a floor surface is formed on the bottom surface 20a of the U-shaped fitting. An anchor bolt hole 20d is formed through which the anchor bolt 22 for fixing to the FL passes. The length of the U-shaped bracket 20 varies in accordance with the writing rack, and FIG. 2 (a) is an example of a long U-shaped bracket, and FIG. 2 (b) is an example of a short U-shaped bracket. When the U-shaped bracket 20 is long, the stability of the bookshelf can be increased by increasing the number of locations of the mounting bolt holes 20c and the anchor bolt holes 20d. On the other hand, when the U-shaped bracket is short, it is preferable to attach a plurality of places to one side plate 11. That is, since the length of the U-shaped fitting 20 is not particularly limited, the number of places of the mounting bolt holes 20c and the anchor bolt holes 20d is not particularly limited either, and may be determined according to the size and the installation place.

  The attachment procedure to the bookshelf of the vibration control structure for bookshelf is demonstrated. First, the U-shaped fitting 20 is disposed on the floor surface FL on which the bookshelf 10 is to be installed. Then, the first elastic member 31 is placed at a predetermined position on the bottom surface 20a of the U-shaped fitting. Then, the anchor bolt hole 20 d of the U-shaped fitting 20 is penetrated to fix the anchor bolt 22 to the floor surface FL. Next, the bookcase 10 is installed so that the side plate 11 of the bookcase 10 is sandwiched between the U-shaped brackets 20. The bottom of the side plate 11 may be provided with a recess that can accommodate the head of the anchor bolt 22. Finally, the side plate 11 and the U-shaped bracket 20 are fixed by passing the mounting bolt 21 through the mounting bolt holes 20 c opened in the side surface 20 b of the U-shaped bracket.

  The second elastic member 32 may be sandwiched between the side surface of the side plate 11 and the side surface 20b of the U-shaped bracket. By providing the second elastic member 32, the effect of absorbing and damping the earthquake motion can be enhanced as compared with the case of using only the first elastic member 31.

  The materials of the first elastic member 31 and the second elastic member 32 are not particularly limited as long as they function as dampers, but basically they are made of rubber and it is desirable that they have high durability. Further, the number and the size of the U-shaped bracket 20 may be determined in consideration of the length of the U-shaped bracket 20 and the stability of the bookcase 10 without limitation. In addition, since the first elastic member 31 and the second elastic member 32 are provided inside the U-shaped fitting 20, the deformation is limited to a certain extent, and it is possible to suppress the bookshelf 10 from becoming unstable more than necessary. .

  Moreover, in order to adjust the inclination of the bookcase 20, the height adjustment material 35 can be used. The height adjustment member 35 may be installed between the floor surface FL and the bottom surface 20 a of the U-shaped fitting. The height adjusting member 35 can be prevented from being dislocated or dislocated by the provision of the holes through which the anchor bolt 22 passes. In addition, although the raw material of the height adjustment material 35 is based on metal fundamentally, it can also further contribute to the damping effect of earthquake motion by using an elastic material.

  The vibration control structure for a bookshelf of the present invention is a simple structure using a U-shaped bracket, so that the vibration control structure can be easily added in combination with an anchor bolt. In addition, since the first elastic member and the second elastic member can be replaced, they also have an advantage of being able to easily cope with replacement when deteriorated. Furthermore, since the first elastic member and the second elastic member are provided inside the U-shaped fitting, they do not deform more than necessary. Moreover, it is also possible to adjust the inclination of a bookshelf easily using a height adjustment material.

  And since such a vibration control structure for bookshelf is installed directly under the side plate of the bookshelf, it has the merit that the appearance is clean and it does not become an obstacle such as walking.

DESCRIPTION OF SYMBOLS 10 bookcase 11 side plate 12 frame 13 shelf plate 14 back plate 20 U-shaped bracket 20a bottom surface 20b of U-shaped bracket side 20c of U-shaped bracket mounting bolt hole 20d anchor bolt hole 21 mounting bolt 22 anchor bolt 31 first elastic member 32 2 elastic members 35 height adjustment material FL floor surface

Claims (3)

U-shaped bracket sandwiching the side plate of the bookshelf from the bottom side,
A mounting bolt which penetrates the side surface of the U-shaped bracket and fixes the U-shaped bracket to the side plate;
A first elastic member sandwiched between a bottom surface of the U-shaped bracket and the side plate on which the book rack is installed;
And an anchor bolt fixed to the floor surface through the bottom surface of the U-shaped bracket.   The vibration control structure for a bookshelf according to claim 1, further comprising a second elastic member sandwiched between the side surface of the side plate and the U-shaped bracket.   3. The vibration control as set forth in claim 1, further comprising a height adjustment material between the U-shaped fitting and the floor surface, and the anchor bolt penetrates the height adjustment material. Construction.

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