JP2006158941A - Quake-resistant structure of school desk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To give a school desk a quake-resistant structure capable of providing a schoolchild with an appropriate shelter when an earthquake occurs. <P>SOLUTION: The school desk D has four leg supports 11a, 11a 11b and 11b which support a top panel 3. The school desk D also has a front panel 4, which is a first modesty panel, to connect the left and right leg supports 11b and 11b located in the rear, a side panel 5, which is a second modesty panel, to connect the front and rear leg supports 11a and 11b located on the left or right side, and a gripping means 6 located between the front and rear leg supports 11a and 11b located on the left or right side 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 structure of a 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.

  An object of this invention is to provide the earthquake-resistant structure of the schoolchild's desk which solved these subjects at once.

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

  That is, the earthquake-resistant structure of the schoolchildren desk according to the present invention includes a schoolchildren desk having four leg posts supporting the top board, a first curtain that connects the left and right leg supports, and left and right And a second curtain plate for connecting the front and rear leg struts positioned on the left and right and the front and rear leg struts positioned on the left and right, and a gripping means provided at a position where a person who has entered under the top plate can grip. Is.

  In such a case, the first curtain plate, the second curtain plate, and the gripping means are attached to a conventionally used schoolchild desk that has a top board supported by four leg posts. The first curtain that protects schoolchildren from flying objects connects the left and right leg posts located behind, and the second curtain that also protects schoolchildren from flying objects The front and rear leg struts that are positioned are connected to each other, and gripping means necessary for maintaining the posture at a position that can be gripped by a person who has entered under the top plate between the front and rear leg struts that are positioned to the left and right are provided. Therefore, the strength of the entire desk can be effectively ensured by attaching only the element parts necessary for earthquake resistance to a conventionally used schoolchild desk.

  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 realize such an earthquake resistant structure with less man-hours, it is preferable that the gripping means is provided integrally with the second curtain.

  Since the present invention is configured as described above, it is possible to easily and effectively provide a structure as an earthquake-resistant school desk that provides an appropriate evacuation place for school children in the event of an earthquake to a school desk used in the past. It becomes possible.

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

  1 is a perspective view, FIG. 2 is a front view, FIG. 3 is a side view, FIG. 4 is an exploded perspective view, and FIG. 5 is an aa cross-sectional view in FIG. It is used for the schoolchild desk D which supported the shelf board 2 and the top board 3 on the leg structure 1 like this. This schoolchild desk D has the same structure as a well-known schoolchildren desk widely used conventionally.

  Specifically, the leg structure 1 includes four leg columns 11a, 11a, 11b, and 11b. The leg struts 11a and 11b are made of a metal round pipe material. In addition, the upper ends of the front and rear leg posts 11a and 11b located on the left and right sides are connected via a connecting portion 11s. In the present embodiment, a single metal round pipe is bent to form a leg strut 11a positioned at the front, a connecting portion 11s, and a leg strut 11b positioned at the rear. In addition, a metal reinforcing member 15 that also functions as a footrest is bridged between the front and rear leg struts 11a and 11b located on the left and right sides of the leg structure 1 via a welded joint (not shown). . Further, the left and right leg struts 11a, 11a located in front are bridged with a metal reinforcing member 16 via a welded joint (not shown). A hook 17 for hanging luggage is attached to the connecting portion 11s.

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

  Thus, in the present embodiment, the front panel is a first curtain plate that is separate from each other between the left and right leg posts 11b and 11b located at the rear and between the front and rear leg posts 11a and 11b located at the left and right. 4 and a side panel 5 as a second curtain are attached and connected. 1, FIG. 2, and FIG. 3 show a state in which the front panel 4 and the side panel 5 are attached to the school desk D. Further, in the present embodiment, the side panel 5 is further provided with gripping means 6 that can be gripped by a person who has entered under the top plate 2.

  The front panel 4 and the side panel 5 are made of metal, and bent pieces 4a and 5a that are partly attached along the outer circumferences of the leg columns 11a and 11b are formed at standing edges located at both ends of the panel surface. . Further, as shown in FIG. 6 which is an enlarged view of the main part of FIG. 5, the bent pieces 4a and 5a are formed with screw insertion holes 4x and 5x, and the leg strut 11a. , 11b are formed with female screw holes 11x, 11x. The screw member B is inserted into the screw insertion holes 4x and 5x, and the male screw member B is screwed into the female screw holes 11x and 11x with the male screw member B being in contact with the leg posts 11a and 11b. I wear it. The front panel 4 and the side panel 5 are formed with bent portions 4d and 5d which are bent inward so as to conceal the end of the wooden table at the lower end portion of the panel surface. The panel surfaces of the front panel 4 and the side panel 5 are provided with a large number of punching holes 4e and 5e having a small diameter so that schoolchildren's claws do not enter, and the hole diameter is 7 mm or less at maximum.

  The gripping means 6 is formed by gripping a round pipe material having a diameter of about 15 mm to 30 mm that extends substantially horizontally in the front-rear direction. Specifically, one end is welded to the rear portion of the side panel 5 via a welded joint X2 and the other end is extended obliquely forward substantially horizontally, and one end is welded to the front portion of the side panel 5. It consists of a front gripping portion 6b 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 6c located between the other ends of both gripping portions.

  The schoolchild desk for earthquake resistance of the present embodiment configured as described above is provided with the gripping means 6 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 6 so as not to fall down, and the surroundings can be seen through the punching holes 4e and 5e provided in the front panel 4 and the side panel 5, or the front panel 4 and the side panel 5 By being there, it is possible to protect yourself from scattered objects that are about to jump under the top 3 from the side.

  By configuring in this way, it is possible to maintain the posture against the front panel 4 and the side panel 5 that protect the school children from scattered objects and the shaking on the conventionally used school children's desk D without depending on the frame or the like. It is possible to effectively secure the strength of the leg structure 1 and the entire desk simply by attaching the necessary parts such as the gripping means 6 required for earthquake resistance, and it is simple and light weight without impairing the earthquake resistance function compared to the prior art. It becomes possible to provide a desk effectively.

  In particular, since the gripping means 6 is arranged substantially horizontally and the relative height from the schoolchild to the gripping means 6 does not change before and after the body posture changes due to the earthquake, the schoolchild uses the entire gripping means 6 well. Can be held stably. In other words, there is no optimal posture to be illustrated in particular, and it is possible to protect the body by effectively using the gripping means 6 in various postures.

  In addition, the front panel 4 and the side panel 5 are bent at the lower end of the panel surface so as to conceal the mouth, and the bent portions 4d and 4d are relatively large and smoothly bulged. Even if it collides with the lower end of the front panel 4 or the side panel 5, the impact can be effectively reduced at the bent portions 4d and 5d. In addition, since the bent portions 4d and 5d function as ribs, the strength of the front panel 4, the side panel 5, and the entire desk can be improved more effectively, and safety is also achieved by making the end closed. Can be secured.

  In addition, since the front panel 4 and the side panel 5 are provided with a large number of punching holes 4e and 5e that are small enough to prevent schoolchildren's claws from entering, when they evacuate under the desk during an earthquake, they pass through the punching holes 4e and 5e. In addition to being able to look around, the punching holes 4e and 5e are small, so that inconveniences such as catching on the claws can be effectively avoided.

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

  For example, a mode in which screw insertion holes are provided at both front and rear ends of the gripping means, a female screw hole is provided in the leg post, and a male screw member that has passed through the screw insertion hole is screwed into the female screw hole is also conceivable. In this aspect, since the front and rear leg struts positioned on the left and right are connected by the gripping means in addition to the side panel, the strength can be further increased.

  Moreover, it replaces with the front panel 4 and the side panel 5 in embodiment mentioned above, makes the column shape which notched the upper edge part and both side edge parts, and connects the upper end part of the leg support | pillars 11a and 11b An attachment portion that can be attached to each of the portion 11s and the leg columns 11a and 11b is provided, and the first curtain plate and the second curtain plate that are to be attached to the desk D through the attachment portions may be attached. Good. The attachment portions of the first curtain plate and the second curtain plate are formed of an elastic metal material and fixed to the first curtain plate or the second curtain plate by a method such as welding or screwing. It is good to provide.

  Further, in place of the front panel 4 and the side panel 5 in the above-described embodiment, a first curtain plate and a second curtain plate having engagement holes in the upper edge portion and both side edge portions are prepared, and the leg strut 11a. A panel attaching member having an engaging claw is attached to the connecting portion 11s connecting the upper end portion of 11b, and the leg columns 11a, 11b, and the engaging hole is engaged with the engaging claw to form a first curtain plate. And you may make it attach a 2nd curtain.

  In addition, an adjuster may be provided at the lower end of the leg column, and the leg column may be supported by the adjuster so that the height can be adjusted.

  And in a schoolchild's desk with a top board supported by four leg posts, it is possible that the leg posts will be crushed by an excessive impact force on the leg posts in the event of an earthquake. In a schoolchild's desk that is provided with an adjuster at the lower end and supports the leg struts so that the height of the leg struts can be adjusted, in order to prevent such crushing of the leg struts, the adjuster mounting structure shown in FIG. Good. This has a female female screw member 110 that is press-fitted into the lower hollow portions of the leg posts 11a and 11b, and has an expanded portion 110a that is larger in diameter than the inner diameter of the leg posts 11a and 11b. The screw member 111 is used by screwing the screw shaft 111a of the adjuster main body 111 to the screw member 110. 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.

  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 front view which shows the same embodiment. The side view which shows the same embodiment. The disassembled perspective view which shows the same embodiment. Aa sectional drawing in FIG. The figure which expanded and showed the principal part in FIG. The figure which shows the modification of the same embodiment.

Explanation of symbols

11a, 11b ... Leg column 4 ... Screen (front panel)
5 ... curtain (side panel)
6 ... gripping means 4e, 5e ... punching hole

Claims (5)

A school desk with four tops that support the top board, a first curtain that connects the left and right leg posts located behind, and a first desk that connects the front and rear leg posts located right and left. An earthquake-resistant structure for schoolchildren desks, wherein two curtain plates and a gripping means provided at a position that can be gripped by a person who has dived under the top plate between the front and rear leg posts positioned on the left and right are attached. The earthquake-resistant structure for schoolchildren's desks according to claim 1, wherein the gripping means is a rod-like member extending substantially horizontally in the front-rear direction. The earthquake-resistant structure of the schoolchild's desk of Claim 1 or 2 bent so that the lower end of a curtain may conceal the mouth. The earthquake-resistant structure of the schoolchildren desk of Claims 1-3 in which many punching holes of the magnitude | size which are the extent which a schoolchild's fingernail does not enter are provided in the curtain. The schoolchild desk earthquake-proof structure according to claim 1, wherein the gripping means is provided integrally with the second curtain.

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