JP2006158940A - Quake-resistant school desk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a quake-resistant school desk capable of providing a schoolchild with an appropriate shelter when an earthquake occurs. <P>SOLUTION: The desk has four leg supports 11a, 11a, 11b and 11b which support a top panel 3. The left and right leg supports 11b and 11b which are located in the rear, and the front and rear leg supports 11a and 11b which are located on the left or right side are connected via a front panel 12 and a side panel 13 respectively, which are separate from each other. The front and rear leg supports 11a and 11b which are located on the left or right side are connected via a gripping means 14 disposed at such a position as can be easily gripped by a person hiding under the top panel 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an earthquake-resistant school desk that provides an appropriate refuge for school children in the event of an earthquake.

  Traditionally, when an earthquake strikes during a class in a school classroom, it is explained as a safety measure that schoolchildren must first evacuate under a sitting desk. Sometimes this is done as a training.

  For this reason, schoolchildren's desks must be strong enough not to be easily crushed, and the safety of schoolchildren evacuated under the desks must be fully considered.

Therefore, as shown in Patent Document 1, the frame is made of a metal material, and a top plate and a shelf plate are attached to the upper portion, and all or part of the periphery of the leg portion is punched except for the front thereof. An earthquake-resistant schoolchildren's desk covered with a metal protective plate with holes, or a frame made of a metal material, a top plate and a shelf are attached to the top, and all or part of the area around the legs An earthquake-resistant schoolchildren desk has been devised which is surrounded by a protective plate except for the front and provided with gripping means below the top plate or shelf.
Japanese Patent No. 2704719

  However, in this case, the four legs are connected via a connecting member, and a frame body is provided on both sides of the upper part and the rear upper part to secure the strength of the entire desk. Since the protective plate is provided around, there is a drawback that it is difficult to avoid the whole from becoming heavy due to the frame body and the connecting member.

  In addition, since the gripping means are arranged obliquely, there is a difficulty that the posture that is easy to grip is limited to the posture shown in the same document.

  In addition, since it is dangerous to touch a part of the body of the schoolchild with the mouthpiece of the curtain, it may be possible to weld a flat bar to the lower edge of the curtain on the schoolchild's desk as shown. Because it does not have thickness, it feels painful when a part of the body hits the flat bar strongly, which is not safe. In addition, since such a structure is not directly related to the strength of the entire desk, it is desirable to adopt a configuration in which the countermeasure against the mouth is simultaneously a countermeasure against the strength.

  Furthermore, since the conventional punching hole has a diameter of about φ7.5 mm, there is a problem that the nail of the school child gets in and easily caught when clinging to the desk during daily life or during an earthquake.

  The object of the present invention is to provide an earthquake-resistant school desk that solves these problems all at once.

  In order to achieve the above object, the present invention takes the following measures.

  That is, the school desk for earthquake resistance of the present invention is formed by supporting the top board on the four leg posts, between the left and right leg posts located at the rear, and between the front and rear leg posts located at the left and right, Each is connected via a separate curtain, and the front and rear leg struts located on the left and right are connected via a gripping means provided at a position where a person who has entered under the top can grip. Is.

  Even if it is such a thing, even without relying on the frame etc., only the element parts necessary for earthquake resistance such as the curtain plate that protects the schoolchild from scattered objects and the gripping means necessary to maintain the posture against shaking The strength of the entire desk can be effectively secured.

  The gripping means is preferably a rod-like member extending substantially horizontally in the front-rear direction.

  As the structure of the curtain, it is preferable that the lower end of the curtain is bent so as to conceal the end.

  Alternatively, it is also effective to provide a punching plate with a number of punching holes large enough to prevent schoolchildren's claws from entering.

  In order to ensure high strength of the entire desk, it is desirable that the leg posts and the curtain are made of metal and connected to each other via a welded joint.

  In order to prevent crushing of the leg struts and to ensure a retreat space effectively, an attachment member provided at the lower end portion of the leg struts and having an expanded portion having a diameter larger than the inner diameter of the leg struts. An adjuster provided with an adjuster body to be attached to the attachment member is provided, and in order to make the expansion portion of the attachment member function as a crushable zone that absorbs the impact applied to the leg support, the rigidity of the extension portion is made higher than that of the leg support. Is also preferable.

  Although the weight of the entire desk increases by providing the curtain plate and the gripping means, in order to facilitate such movement of the desk, the leg strut located in the front or the leg strut located in the rear is used. It is desirable to have casters on either side.

  In a desk provided with such a caster, it is provided at the lower end of the leg post in order to facilitate the movement of the desk while preventing crushing of the leg post and ensuring the retreat space effectively. The lower end portion is provided with an attachment member having an enlarged portion having a larger diameter than the inner diameter of the leg strut and an adjuster body having an adjuster body attached to the attachment member, and as a crushable zone for absorbing an impact on the leg strut. In order to make the expanding portion of the mounting member function, it is preferable that the expanding portion has a lower rigidity than the leg column.

  In order to be able to provide a desk with an appropriate height of the top board according to the growth of school children, the upper element connected to the top board, the lower element standing up from the floor surface, It is desirable to include a top plate height changing mechanism that changes the relative positions of the upper element and the lower element to change the height position of the top plate.

  Since the present invention is configured as described above, it is possible to effectively provide an earthquake-resistant school desk that provides school children with an appropriate evacuation place in the event of an earthquake.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 6, the earthquake-resistant school children's desk of this embodiment is configured such that a shelf board 2 and a top board 3 are supported on a leg structure 1. The leg structure 1 includes four leg struts 11a, 11a, 11b, and 11b. Between the left and right leg struts 11b and 11b located at the rear and between the front and rear leg struts 11a and 11b located at the left and right. A person who has been connected to each other through the front panel 12 and the side panel 13 which are separate curtains, and has entered the space between the front and rear leg posts 11a and 11b located on the left and right sides under the top board 2. It is connected via a gripping means 14 that can be gripped.

  More specifically, the leg posts 11a and 11b are made of a metal round pipe material, and the lower ends thereof are supported by the adjuster 11c so that the height can be adjusted.

  The front panel 12 and the side panel 13 are made of metal, and bent pieces 12a and 13a (parts of FIG. 3 and FIG. 3) that are partly attached to the standing edges located at both ends of the panel surface along the outer periphery of the leg columns 11a and 11b. 6), and with the bent pieces 12a and 13a attached to the leg posts 11a and 11b, an appropriate portion between the bent pieces 12a and 13a and the leg posts 11a and 11b is connected via the weld joint X1. It is in close contact. These panels 12 and 13 are formed with horizontal bent pieces 12b and 13b at the upper end of the panel surface. The bent pieces 12b and 13b are provided with screw insertion holes 12c and 13c. In this way, bent portions 12d and 13d that are bent inwardly into an R shape are formed. The panel surfaces of the panels 12 and 13 are provided with a large number of punching holes 12e and 13e having such a small diameter that the schoolchild's claws do not enter, and the maximum hole diameter is 7 mm or less. A hook 17 for hanging luggage or the like is attached to the side panel 13.

  The gripping means 14 is formed by gripping a round pipe material having a diameter of about 15 mm to 30 mm extending substantially horizontally in the front-rear direction. Specifically, one end is welded to the rear leg strut 11b via a welded joint X2, and the other end is extended obliquely forward substantially horizontally, and one end is welded to the front leg strut 11a. It consists of a front gripping portion 14b that is rigidly connected via the joint X2 and has the other end extending obliquely rearward substantially horizontally, and a substantially horizontal intermediate gripping portion 14c that is positioned between the other ends of both gripping portions.

  Further, in the leg structure 1, a metal reinforcing member 15 that also functions as a footrest is bridged via a welded joint X3 between the front and rear leg struts 11a and 11b located on the left and right.

  Furthermore, the left and right leg struts 11a, 11a positioned in front are bridged with a metal reinforcing member 16 that also functions as a shelf support member via a weld joint X4.

  In this embodiment, the shelf board 2 and the top board 3 are attached to the leg structure 1 configured as described above.

  The shelf plate 2 has a bottom plate 21, left and right side plates 22 and a rear plate 23, and is made of metal that is open forward and upward, and is provided with a recess 24 for receiving the reinforcing member 16 on the lower surface on the front end side. Horizontal bent pieces 22a and 23a are formed at the upper ends of the side plate 22 and the rear plate 23, and screw insertion holes 22b and 23b are provided in the bent pieces 22a and 23a. The bottom plate 21 or the like is provided with ribs or the like as necessary to increase the strength.

  On the other hand, the top plate 3 is made of rubber plywood with a melamine decorative board, and has a planar shape in which the rear edge 31 and the side edge 32 overhang the rear panel and the side panel 13 beyond the front panel 12 and the side panel 13. ing.

  The shelf 2 is positioned on the leg structure 1 with the recess 24 supported by the reinforcing member 16, and the top plate 3 is placed on the bent pieces 12 b and 13 b of the panels 12 and 13. A screw (not shown) is inserted from below into the screw insertion hole 13c provided in the bent piece 13b of the side panel 13 and the screw insertion hole 22b provided in the bent piece 22a located on the side of the shelf 2 from below. And a screw (not shown) is inserted from below into the screw insertion hole 23b provided in the bending piece 23a located behind the shelf board 2 and fixed to the lower surface of the top plate 3, and the front panel 12 is bent. The shelf board 2 and the top board 3 are attached to the leg structure 1 by inserting a screw (not shown) into the screw insertion hole 12c provided in the piece 12b from below and fixing it to the lower surface of the top board 3.

  The schoolchild desk for earthquake resistance of the present embodiment configured as described above is provided with the gripping means 14, so that the schoolchild evacuated under the desk at the time of the earthquake is thrown out from under the desk by the shaking of the earthquake, or The desk can be held and supported by the gripping means 14 so that the desk does not fall down, and the surroundings can be seen through the punching holes 12e and 13e provided in the panels 12 and 13, or from the side by the presence of the panels 12 and 13. You can protect yourself from the scattered material that jumps under the board 3.

  And, in order to support the top board 3 on the four leg struts 11a, 11a, 11b, 11b, the earthquake-resistant schoolchild desk of this embodiment is located between the left and right leg struts 11b, 11b and to the left and right. The front and rear leg struts 11a and 11b are connected to each other via a front panel 12 and a side panel 13 which are separate from each other, and the front and rear leg struts 11a and 11b located on the left and right are connected to the top plate 3. It is connected via a gripping means 14 provided at a position where a person who has entered underneath can grip.

  By configuring in this way, elements that are necessary for earthquake resistance, such as the panels 12 and 13 that protect the school children from scattered objects and the gripping means 14 that is necessary to maintain the posture against shaking, without depending on the frame or the like. The strength of the leg structure 1 and thus the entire desk can be effectively ensured with only the components, and a simple and lightweight desk can be effectively provided without impairing the seismic resistance function as compared with the prior art.

  In particular, since the gripping means 14 is arranged substantially horizontally and the relative height from the schoolchild to the gripping means 14 does not change before and after the body posture changes due to the earthquake, the schoolchild uses the entire gripping means 14 well. Can be held stably. That is, there is no optimal posture to be illustrated in particular, and it is possible to protect the body by effectively using the grip means 14 in various postures.

  The panels 12 and 13 are bent at the lower end of the panel surface so as to conceal the end of the panel, and the bent portions 12d and 13d are relatively large and smoothly bulged. Even if it collides with the lower end of 13, the bent portions 12d and 13d can effectively reduce the impact. Further, since the bent portions 12d and 13d function as ribs, the strength of the panels 12 and 13 and thus the entire desk can be improved more effectively, and safety can be ensured by making the end closed. it can.

  In addition, since the panels 12 and 13 are provided with a number of punching holes 12e and 13e that are small enough to prevent schoolchildren's claws from entering, when evacuating under a desk in the event of an earthquake, the surroundings are viewed through the punching holes 12e and 13e. In addition, since the punching holes 12e and 13e are small, it is possible to effectively avoid inconveniences such as catching of claws.

  In particular, since the leg posts 11a and 11b and the panels 12 and 13 are made of metal and are connected to each other via the welded joint X1, it is possible to obtain high strength for the leg structure 1 and the entire desk. .

  The specific configuration of each unit is not limited to the above-described embodiment.

  For example, the adjuster 11c is desirably configured as shown in FIG. This has a resin internal thread member 110 as a mounting member press-fitted into the lower end hollow portion of the leg posts 11a, 11b, and an expanded portion 110a having a diameter larger than the inner diameter of the leg posts 11a, 11b at the lower end. The screw shaft 111a of the adjuster main body 111 is screwed into the female screw member 110 for use. In this case, when the top plate 3 is subjected to a large impact during an earthquake and a reaction force from the floor is applied to the female screw member 110, if the expanded portion 110a is made of resin, the expanded portion 110a is subjected to a strong impact force. The female screw member 110 is immersed in the leg posts 11a and 11b while being deformed or damaged, and the impact applied to the leg posts 11a and 11b at this time can be absorbed. That is, the expansion part 110a functions as a crushable zone, so that an excessive impact force is not applied to the leg posts 11a and 11b. As a result, the leg posts 11a and 11b are not crushed, and the retreat space is reduced. It can be secured effectively. The lower end of the leg post 11a is press-fitted with a mounting member having an expanded portion larger than the inner diameter of the leg post 11a and a screw shaft extending downward at the lower end, and a female screw hole is provided at the upper end of the adjuster body. Of course, a configuration in which the screw shaft is screwed into the female screw hole may be adopted.

  8 is an overall perspective view as viewed obliquely from above, FIG. 9 is a front view, FIG. 10 is a left side view, and FIG. 11 is a longitudinal sectional view of the main part of the leg column. The height of the top plate 3 by changing the relative positions of the upper element A111 connected to the top plate 3, the lower element A112 standing up from the floor, and the upper and lower elements You may employ | adopt leg support | pillar A11 provided with the top plate height change mechanism A113 which changes a position. The left and right leg struts located at the front are denoted by reference signs A11a and A11a, and the left and right leg struts located at the rear are denoted by reference signs A11b and A11b, respectively.

  Specifically, the upper element A111 has substantially the same basic configuration as the leg column 11 in the above-described embodiment, and the length dimension is smaller than that of the leg column 11 in the above-described embodiment.

  On the other hand, the lower element A112 has an outer diameter that is slightly smaller than the inner diameter of the upper element A111 and can be inserted into the upper element. A base A112b having an outer diameter substantially the same as the diameter and an adjuster A11c provided at the lower end of the base A112b are provided. In the present embodiment, a metal reinforcing member 15 that also functions as a footrest exactly the same as that of the above-described embodiment is bridged between the front and rear lower elements A112 via a welded joint X3.

  Then, as shown in FIG. 11, the top plate height changing mechanism A113 includes a screw insertion hole A111x provided at two positions at a lower end of the upper element A111 at a predetermined distance in the height direction, and a lower element. A threaded hole A112x for providing at three or more locations apart from each other by a predetermined distance d in the height direction in the insertion portion A112a of A112, and a male screw member B1 passing through the screw insertion hole A111x and screwed into the female screw hole A112x It is formed using. The female screw hole A112x has a female screw hole from the center of the leg post A11 so as not to be conspicuous from the outside so as to adjust its appearance as shown in a cross-sectional view of the main part of the leg post A11 in FIG. A line L1 directed to the center of A112x is directed to the space below the top plate, and is formed between the line L1 and a line L2 directed to the adjacent leg column on a horizontal plane passing through the center of the female screw hole A112x. The angle θ is set to 45 degrees. In addition, in the present embodiment, a resin-made ring-shaped first abutting member A114 is attached to the lower end of the upper element A111, and the first abutting member A114 abuts on the lower element A112. Yes. A second ring-shaped contact member A115 made of resin is also attached to the upper end of the lower element A112, and the second contact member A115 contacts the upper element A111.

  In addition to the above, the top plate height changing mechanism has a mode in which only one or three or more screw insertion holes are provided in the lower end portion of the upper element, or a screw insertion hole is formed in the lower element, There may be a mode in which a female screw member such as a plate nut having a female screw hole is fixedly provided, and a male screw member in which the screw insertion holes of the upper element and the lower element are sequentially inserted is screwed to the female screw member. .

  Further, as shown in FIG. 13 as an overall perspective view seen obliquely from the upper rear side, casters 18 may be provided on the left and right leg columns 11b located at the rear instead of the adjusters 11c. If it does in this way, the caster 18 can be functioned by moving the desk easily by separating the left and right leg columns 11a positioned forward by lifting the top board 3 or the like.

  In addition, the caster 18 has a resin-made female screw member 180 as an attachment member that has an expanded portion 180a having a diameter larger than the inner diameter of the leg column 11a at the lower end and is press-fitted into the hollow portion of the lower end of the leg column 11b. It is more preferable to employ a structure as shown in FIG. 14 that includes a caster body 181 having a screw shaft 181a to be screwed into the female screw member 180. In such a case, when the top plate 3 is subjected to a large impact at the time of an earthquake and a reaction force from the floor is applied to the female screw member 180, the expanded portion 180a of the female screw member 180 has the above-described adjuster 11c. It acts in the same manner as the expanding portion 110a, and as a result, the leg strut 11b is not crushed, and the retreat space can be effectively secured.

  Of course, the casters 18 described above may be provided not on the leg struts 11b located on the rear but on the leg struts 11a located on the front. In addition, an attachment member having a widened portion larger than the inner diameter of the leg strut 11a (11b) at the lower end and a screw shaft extending downward is press-fitted into the lower end of the leg strut 11a (11b), and at the upper end of the caster body. Of course, a structure in which a female screw hole is provided and the screw shaft is screwed into the female screw hole may be adopted.

  Of course, the caster 18 may be provided in place of the adjuster A11c at the lower end of the leg support A11 having the above-described top plate height changing mechanism A113.

  Other configurations such as the thickness and shape of the column, the thickness and shape of the gripping means, the material of the top plate and the panel, and the like can be variously modified without departing from the spirit of the present invention.

The perspective view which looked at one embodiment of the present invention from the back diagonally upward. The perspective view which looked at the same embodiment from the diagonally lower front. The partial disassembled perspective view which looked at the same embodiment from diagonally front upper. The front view of the embodiment. The left view of the embodiment. The top view which abbreviate | omitted a part of the same embodiment. The figure which shows the modification of the same embodiment. The perspective view which looked at other embodiment of the present invention from the back diagonally upward. The front view of the embodiment. The left view of the embodiment. The longitudinal cross-sectional view of the principal part of the leg support | pillar of the embodiment. The cross-sectional view of the principal part of the leg support | pillar of the embodiment. The perspective view which looked at other embodiment of the present invention from the back diagonally upward. The longitudinal cross-sectional view of the principal part of the leg support | pillar of the embodiment.

Explanation of symbols

11a, 11b ... Leg column 12 ... Screen (front panel)
13 ... curtain (side panel)
14 ... gripping means 12e, 13e ... punching hole X1 ... weld joint

Claims (9)

In the case where the top plate is supported by the four leg posts, the left and right leg posts located at the rear and the front and rear leg posts located at the left and right are respectively separated via a curtain plate. An anti-school children's desk for earthquake resistance, characterized in that it is connected, and the front and rear leg struts positioned on the left and right are connected via gripping means provided at a position where a person who has entered under the top can grip. . The schoolchild desk for earthquake-proofing according to claim 1, wherein the gripping means is a rod-shaped member extending substantially horizontally in the front-rear direction. The schoolchild desk for earthquake resistance according to claim 1 or 2, wherein the lower end of the curtain is bent so as to conceal the end. The schoolchild desk for earthquake-proofing according to claims 1 to 3, wherein the curtain plate is provided with a number of punching holes having a size that does not allow schoolchild's claws to enter. The schoolchild desk for earthquake resistance according to claim 1, wherein the leg posts and the curtain are made of metal and connected to each other through a welded joint. An impact is applied to the leg strut, as well as an attachment member provided at the lower end of the leg strut and having an expanding portion at the lower end having an enlarged portion larger than the inner diameter of the leg strut and an adjuster body attached to the attachment member. The schoolchild desk for earthquake-proofing according to claim 1, wherein the expanding portion has a lower rigidity than that of the leg support so that the expanding portion of the mounting member functions as a crushable zone that absorbs water. The schoolchild desk for earthquake resistance of Claims 1-6 which has provided the caster in either the leg support | pillar located in the front, or the leg support | pillar located in back. The caster is provided with an attachment member provided at a lower end portion of the leg strut and having an expanded portion having a diameter larger than the inner diameter of the leg strut at the lower end portion, and a caster body attached to the attachment member. The earthquake-resistant school desk according to claim 7, wherein the expansion portion has a lower rigidity than that of the leg column so that the expansion portion of the mounting member functions as a crushable zone that absorbs an impact applied. The top element to be connected to the top board on the leg strut, the lower element to stand up from the floor, and the top board height change to change the relative position of the upper element and the lower element to change the height position of the top board A schoolchild desk for earthquake resistance according to claim 1, comprising a mechanism.

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