JP2023034253A - Overturning prevention device - Google Patents

Abstract

To enhance versatility and safety, and reduce costs.SOLUTION: An overturning prevention device 10 is used for a shelf body 1 (installation object) whose movement in a back surface direction is regulated by a wall surface WA of a building, and includes: a lower trestle 12 installed on an installation surface F along a back and forth direction of the shelf body 1; an upper trestle 14 fixed to the undersurface of the shelf body 1 and disposed on the lower trestle 12, which moves to the front FR on the lower trestle 12 when force in a direction moving to the front FR is applied to the shelf body 1, and is configured so that the front part 14F is movable upward; and a restraining part 16 intervening between the upper part of the shelf body 1 and the wall surface WA, which suppresses the movement of the upper part away from the wall surface WA, and allows the shelf body 1 to be inclined with respect to the wall surface WA.SELECTED DRAWING: Figure 1

Description

The present invention relates to an overturn prevention device.

Disclosed is an overturn prevention device capable of preventing an installed object from falling forward by positively tilting the installed object backward when swaying occurs in the front-rear direction, and capable of easily returning to the original state. (see Patent Document 1).

Japanese Patent No. 5650788

However, the anti-tip device according to the conventional example described above is a custom-made product that is manufactured according to the size of the object to be installed. In addition, when the upper part of the installed object is fixed to a wall or the like, it is difficult to use an overturn prevention device with a structure that moves the lower part of the installed object.

SUMMARY OF THE INVENTION An object of the present invention is to provide an overturn prevention device that can increase versatility and sense of security and reduce costs.

A fall prevention device according to a first aspect is a fall prevention device used for an installation whose movement in the rear direction is restricted by a wall surface of a building, and is installed on the installation surface along the front-rear direction of the installation. and a lower mounting frame fixed to the lower surface of the installation object and arranged on the lower mounting frame, and moves forward on the lower mounting frame when a force acts on the installation object in a forward moving direction. and an upper frame whose front part is configured to be movable upward, and is interposed between the upper part of the installation object and the wall surface, suppresses the movement of the upper part away from the wall surface, and prevents the upper part from moving away from the wall surface. and a restraining portion that allows the installation object to incline with respect to.

In this overturn prevention device, since the upper portion of the installed object is restrained by the restraining portion, the upper portion is restrained from moving forward when the installed object is about to move forward due to shaking caused by an earthquake or the like. On the other hand, since the lower surface of the installed object is fixed to the upper frame, the upper frame moves forward on the lower frame to move the lower part of the installed object forward relative to the upper part, and furthermore, the front part of the upper frame moves forward. By moving upward, the installation object is tilted backward. Further, even if the installed object remains tilted backward after the shaking of an earthquake or the like subsides, the installed object can be easily restored to its initial state by pushing the installed object backward.

A second aspect is the overturn prevention device according to the first aspect, wherein the restraint part has a first member fixed to the wall surface and a second member fixed to the upper part of the installation object. , the second member is restrained from moving forward with respect to the first member, and is allowed to rotate when viewed from the side of the installation object.

In this overturning prevention device, when the installed object tries to move forward due to shaking such as an earthquake, forward movement of the second member is suppressed by the first member, so that the upper part of the installed object moves forward. is suppressed. In addition, since the second member is allowed to rotate with respect to the first member when viewed from the side of the installed object, the upper frame moves forward and the front part thereof moves upward, thereby moving the installed object. It is in a backward tilted state.

A third aspect is the overturn prevention device according to the second aspect, wherein the first member is formed with a slit extending in the front-rear direction of the installed object, and the second member is formed with a slit extending in the front-rear direction of the installed object. The insertion portion is inserted into the slit from below, and the rear side of the insertion portion as viewed from the side of the installation object is relatively to the front side of the insertion portion. It is configured to be movable in a direction away from the slit.

In this overturn prevention device, the forward movement of the second member is suppressed by engaging the insertion portion of the second member with the slit of the first member. In this state, the rear side of the insertion portion moves in the direction away from the slit, so that the second member rotates with respect to the first member when viewed from the side of the installation object.

A fourth aspect is the overturn prevention device according to any one of the first to third aspects, wherein the upper frame has front wheels and rear wheels that roll on the lower frame, and in an initial state, The shaft of the front wheel is fitted in a groove provided in the lower frame and having an open front, and the shaft of the rear wheel is inserted through a guide hole provided in the lower frame and extending in the front-rear direction.

In this overturn prevention device, in the initial state, the shaft of the front wheel of the upper cradle is fitted in the groove provided in the lower cradle and open to the front, so that the upper cradle cannot move backward from the initial state. Suppressed. When the upper frame moves forward from the position of the initial state, the shaft of the front wheel is separated from the groove. As the front wheels and the rear wheels roll on the lower frame, the upper frame can move smoothly on the lower frame. The front wheels move away from the lower cradle as the upper cradle moves forward and its front portion moves upward.

The rear wheel shaft of the upper pedestal is inserted through the guide hole of the lower pedestal, so when the upper pedestal moves forward, the rear wheel shaft moves along the guide hole, and the rear part of the upper pedestal moves toward the lower pedestal. detachment from is suppressed. Further, when the axle of the rear wheel reaches the front end of the guide hole, further forward movement of the upper frame is prevented.

ADVANTAGE OF THE INVENTION According to this invention, the fall prevention apparatus which can improve versatility and a sense of security, and can reduce cost can be provided.

FIG. 4 is a perspective view showing a state of the shelf body in a normal state and a state in which the shelf body is tilted backward in a state where the overturn prevention device according to the present embodiment is arranged between the shelf body and the installation surface. It is a perspective view which shows a restraint part. It is an exploded perspective view showing a restraint part. It is a perspective view which shows a restraint part when a shelf main body inclines backward. 1 is a perspective view showing a state in which the overturn prevention device according to the present embodiment is viewed from above; FIG. FIG. 11 is a perspective view showing a state in which the upper cradle has moved forward with respect to the lower cradle and the front portion of the upper cradle has moved upward; FIG. 2 is a perspective view showing a state in which illustration of a lower cradle main body is omitted in the overturn prevention device according to the present embodiment; FIG. 8 is a perspective view showing a state in which the upper cradle has moved forward with respect to the rail members of the lower cradle and the front portion of the upper cradle has moved upward in FIG. 7 ; 4 is a perspective view showing rail portions of a lower frame and front wheels and rear wheels of an upper frame; FIG. FIG. 10 is a perspective view showing a state in which the upper cradle has moved forward with respect to the rail members of the lower cradle and the front portion of the upper cradle has moved upward in FIG. 9 ; It is a perspective sectional view showing the overturn prevention device concerning this embodiment. FIG. 2 is a perspective view showing a state in which the overturn prevention device according to the present embodiment is viewed from below; FIG. 4 is a cross-sectional view showing the structure of the vicinity of the height adjustment portion in the overturn prevention device according to the embodiment;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described based on the drawings. Components shown using the same reference numerals in each drawing mean the same or similar components. It should be noted that redundant descriptions and reference numerals in the embodiments described below may be omitted. Also, the drawings used in the following description are all schematic, and the dimensional relationship of each element, the ratio of each element, etc. shown in the drawings do not necessarily match the actual ones. Moreover, the dimensional relationship of each element, the ratio of each element, etc. do not necessarily match between a plurality of drawings.

In the present embodiment, the “front FR” means the direction in which the later-described upper frame 14 protrudes. This "front FR" may coincide with the front side of the installed object, or may coincide with the rear side of the installed object. Further, the "front-rear direction" means a direction including the above-mentioned "front FR" and the opposite direction, ie, the rear RR.

In FIG. 1, an overturn prevention device 10 according to the present embodiment is used by being installed between a shelf body 1 as an example of an installation object and an installation surface F. As shown in FIG. The shelf body 1 is restricted from moving in the rearward direction by the wall surface WA of the building. The overturn prevention device 10 has a lower frame 12 (FIGS. 5 and 6), an upper frame 14 (FIGS. 5 and 6), and a restraining portion 16 (FIGS. 2 to 4). A structure in which the lower frame 12 and the upper frame 14 are combined can also be called a slide device 11 .

As shown in FIGS. 5, 6, 11 and 12, the lower cradle 12 has a lower cradle body 13, a rail member 20, and a height adjuster 22. As shown in FIGS. The lower frame main body 13 is a member that is installed on the installation surface F along the front-rear direction of the shelf main body 1, and the front-rear direction is the longitudinal direction. The lower cradle main body 13 has a bottom surface portion 13A facing the installation surface F, side surface portions 13B positioned on both sides in the width direction W, and a rear wall portion 13C positioned at the end of the rear RR. The lower gantry main body 13 has openings on the upper side and the front FR side. A notch 13D is formed at the front end of the side portion 13B to avoid interference with the shaft 42 of the front wheel 32, which will be described later. As shown in FIG. 6, a rail member 20 is fixed to the upper side of the bottom surface portion 13A of the lower frame main body 13 using, for example, two screws 18. As shown in FIG.

As shown in FIGS. 6 and 8 to 10, the rail member 20 has a front-rear direction as its longitudinal direction, and has a bottom surface portion 20A and side surface portions 20B located on both sides in the width direction W. there is As shown in FIGS. 11 and 13, the bottom surface portion 20A is placed on top of the bottom surface portion 13A of the lower cradle main body 13 and is coupled to the bottom surface portion 13A by screws 18. As shown in FIG. Incidentally, the connecting means is not limited to the screw 18, and for example, a screw may be used.

As shown in FIG. 6, the side portion 20B of the rail member 20 is separated from the side portion 13B of the lower frame body 13, and the side portion 14B of the upper frame 14 is inserted into the gap between the side portions 13B and 20B. It is designed to be Further, guide holes 20C for guiding the shafts 44 of the rear wheels 34 of the upper frame are formed in the side portions 20B on both sides. In the normal state shown in FIG. 5, the shaft 44 of the rear wheel 34 is positioned at the rear end of the guide hole 20C. Also, during operation of the upper frame 14 shown in FIG. 6, the rear wheel 34 is positioned at the front end of the guide hole 20C. That is, the range of front-rear movement of the upper mount 14 corresponds to the range of movement of the shaft 44 of the rear wheel 34 in the guide hole 20C. In addition, the range of the guide hole 20C may be set longer on the front FR side than the movement range of the rear wheel 34 . In this case, a stopper may be provided to determine the movement limit of the upper frame 14 toward the front FR. As shown in FIG. 9, a groove portion 20D is formed at the front end of the side portion 20B to receive the shaft 42 while avoiding interference with the shaft 42 of the front wheel 32 of the upper frame. The notch 20D opens to the front FR side.

11 to 13, the height adjusting portion 22 has a leg portion 24 that can adjust the amount of downward protrusion from the bottom portion 13A of the lower cradle main body 13. As shown in FIG. The leg portions 24 are inserted through the through holes 13F and 20F formed in the bottom surface portion 13A of the lower frame main body 13 and the rail member 20 (FIG. 13), and the ground portion 24A is circular with a diameter larger than that of the through hole 13F. It is A screw shaft 24B is erected at the center of the leg portion 24 . For example, a cross hole 24C (FIG. 13) is formed at the upper end of the screw shaft 24B for hooking a tool (not shown) to the leg portion 24 when adjusting the height.

A support base 26 having, for example, a hat-shaped cross section is fixed on the bottom surface portion 20A of the rail member 20 using screws 28 . The support base 26 is formed with a through hole 26A through which the screw shaft 24B is inserted. A nut 30 is fixed to the lower side of the through hole 26A. The screw shaft 24B is screwed onto this nut 30. As shown in FIG. By rotating the screw shaft 24B by hooking a tool to the cross hole 24C, the amount of protrusion of the grounding portion 24A from the bottom surface portion 13A of the lower frame main body 13 is changed. A through hole 14C for passing a tool is formed in the upper surface portion 14A of the upper frame 14. As shown in FIG.

In FIGS. 1 and 6, the upper frame 14 is fixed to the lower surface of the shelf body 1 and arranged on the lower frame 12. When a force acts on the shelf body 1 to move it forward FR, It is configured so that it can move forward FR on the lower frame 12 and the front portion 14F can move upward. The upper frame 14 has the same length as the lower frame 12, and has an upper surface portion 14A, a side surface portion 14B, and a front surface portion 14D. The outer dimension of the upper cradle 14 in the width direction W is set smaller than the inner dimension of the side portion 13B of the lower cradle body 13, and the space between the side portion 13B of the lower cradle body 13 and the side portion 20B of the rail member 20 is set to be smaller. The side portion 14B of the upper frame 14 is inserted into the gap between (FIG. 6).

As described above, the upper surface portion 14A of the upper mount 14 is formed with two through holes 14C for inserting tools into the height adjusting portion 22. As shown in FIG. An upward projection 14E is formed at the rear end of the upper surface 14A. The rear end of the lower portion of the shelf body 1 (FIG. 1) abuts against the projecting portion 14E, so that the upper frame 14 can be positioned with respect to the shelf body 1. As shown in FIG. For example, four sheets of gel sheets 36 are attached to the upper surface portion 14A in order to increase the adhesion to the shelf body 1 (FIG. 1). A non-slip sheet, an adhesive tape, an adhesive, or the like may be used instead of the gel sheet 36 . As shown in FIG. 11, a reinforcing member 38 having a U-shaped cross section is fixed with a screw 40 to the lower surface side of the upper surface portion 14A. This reinforcing member 38 is provided, for example, in the central portion in the front-rear direction.

As shown in FIG. 10 , the upper frame 14 has, for example, two each of front wheels 32 and rear wheels 34 that roll on the lower frame 12 . Specifically, the front wheels 32 and the rear wheels 34 roll on the bottom surface portion 20A of the rail member 20 on the lower frame 12 . As shown in FIG. 7, both ends of the shaft 42 of the front wheel 32 and both ends of the shaft 44 of the rear wheel 34 are supported by the side portions 14B of the upper frame 14, respectively. A shaft 44 of the rear wheel 34 is prevented from coming off from the side portion 14B by an E-ring 46, for example. It should be noted that the shaft 42 of the front wheel 32 may be provided with a similar stopper. A shaft 44 of the rear wheel 34 is inserted through a guide hole 20C provided in the rail member 20 of the lower frame 12 and extending in the front-rear direction.

In the initial state (normal state), the shaft 42 of the front wheel 32 is fitted in the groove 20D provided in the rail member 20 of the lower frame 12 and having the front FR open. Therefore, the range in which the front wheel 32 rolls on the bottom surface portion 20A of the rail member 20 is small. On the other hand, the rear wheel 34 rolls on the bottom surface portion 20A of the rail member 20 from the initial state (normal time) until the upper frame 14 is moved. Note that the rear wheel 34 may be separated from the bottom surface portion 20A of the rail member 20 depending on how the upper frame 14 is tilted during operation. For example, a case where the tilt of the upper frame 14 becomes large and the rear end of the side surface portion 14B comes into contact with the bottom surface portion 20A of the rail member 20 corresponds to this.

In FIGS. 2 and 3, the restraining portion 16 is interposed between the upper portion of the shelf body 1 and the wall surface WA to suppress the movement of the upper portion away from the wall surface WA and to tilt the shelf body 1 with respect to the wall surface WA. It is a means to allow The restraining portion 16 has a first member 51 fixed to the wall surface WA and a second member 52 fixed to the upper portion of the shelf body 1 . The second member 52 is restrained from moving forward FR with respect to the first member 51 and is allowed to rotate when viewed from the side of the shelf body 1 .

As shown in FIG. 3, the first member 51 integrally has a vertical portion 51A fixed to the wall surface WA and a horizontal portion 51B along the upper surface 1A of the shelf body 1, and is formed, for example, in an L shape. ing. The vertical portion 51A is formed with a through hole 51C for passing fixing means (not shown) such as a screw. A slit 51D extending in the front-rear direction of the shelf body 1 is formed in the horizontal portion 51B.

The second member 52 integrally has a horizontal portion 52B fixed to the upper surface 1A of the shelf body 1 and a plate-like insertion portion 52A erected upward from the horizontal portion 52B and extending in the front-rear direction of the shelf body 1. are doing. The lateral portion 52B is formed with a through hole 52C for passing fixing means (not shown) such as a screw. The insertion portion 52A is inserted into the slit 51D from below, and the rear RR side of the insertion portion 52A as viewed from the side of the shelf body 1 moves away from the slit 51D relative to the front FR side of the insertion portion 52A. It is configured to be movable (Fig. 4).

(Action)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 1, in the overturn prevention device 10 according to the present embodiment, since the upper portion of the shelf body 1 is restrained by the restraining portion 16, when the shelf body 1 is about to move to the front FR due to shaking such as an earthquake, the upper part of the shelf body 1 is restrained. Movement of the upper portion to the front FR is suppressed. On the other hand, since the lower surface of the shelf body 1 is fixed to the upper frame 14, the upper frame 14 in the slide device 11 moves forward FR on the lower frame 12, so that the lower part of the shelf body 1 advances with respect to the upper part. Further, when the front portion 14F of the upper frame 14 moves upward, the shelf body 1 is tilted backward.

When the shelf body 1 tries to move to the front FR, the first member 51 suppresses the movement of the second member 52 to the front FR, thereby suppressing the movement of the upper part of the shelf body 1 to the front FR. be. Specifically, as shown in FIG. 4, the insertion portion 52A of the second member 52 is engaged with the slit 51D of the first member 51, thereby suppressing the movement of the second member 52 to the front FR. . In this state, the rear RR side of the insertion portion 52A moves in the direction away from the slit 51D, so that the second member 52 rotates in the arrow A direction with respect to the first member 51 when viewed from the side of the shelf body 1. Since the second member 52 is allowed to rotate with respect to the first member 51 in this manner, the upper frame 14 moves forward FR and the front portion 14F moves upward, so that the shelf body 1 moves backward. becomes tilted. Even if the shelf body 1 remains tilted backward after the shaking of an earthquake or the like subsides, the shelf body 1 can be easily restored to its initial state by pressing the shelf body 1 rearward RR. .

In this embodiment, in the initial state, the shaft 42 of the front wheel 32 of the upper frame 14 is fitted in the groove portion 20D provided in the lower frame 12 and having the front FR open, so that the upper frame 14 is moved from the initial state position. Movement to the rear RR is suppressed. When the upper frame 14 moves from the position of the initial state to the front FR, the shaft 42 of the front wheel 32 is separated from the groove 20D. As the front wheels 32 and the rear wheels 34 roll on the lower frame 12 , the upper frame 14 can move smoothly on the lower frame 12 . The front wheels 32 are separated from the lower frame 12 when the upper frame 14 moves forward FR and the front portion 14F thereof moves upward.

Since the shaft 44 of the rear wheel 34 of the upper frame 14 is inserted through the guide hole 20C of the lower frame 12, when the upper frame 14 moves forward FR, the shaft 44 of the rear wheel 34 moves along the guide hole 20C. Movement and separation of the rear portion of the upper frame 14 from the lower frame 12 is suppressed. As an example, when the shaft 44 of the rear wheel 34 reaches the front end of the guide hole 20C, the upper frame 14 is prevented from moving further forward FR.

As described above, according to the present embodiment, it is possible to provide an overturn prevention device that enhances versatility and sense of security while reducing costs.

[Other embodiments]
An example of the embodiment of the present invention has been described above, but the embodiment of the present invention is not limited to the above, and can be modified in various ways without departing from the spirit of the present invention. Of course there is.

Although the restraining portion 16 has the first member 51 and the second member 52, the structure of the restraining portion 16 is not limited to this. Any structure that allows the shelf body 1 to incline with respect to .

Further, the movable structure of the upper frame 14 with respect to the lower frame 12 is not limited to the above-described embodiment, and other movable structures may be used as long as they have the same effects as those of the above-described embodiment.

1 shelf body 10 overturn prevention device 12 lower stand 14 upper stand 14F front portion 16 restraint portion 20C guide hole 20D groove portion 32 front wheel 34 rear wheel 42 front wheel shaft 44 rear wheel shaft 51 first member 51D slit 52 second member 52A insertion Section F Installation surface FR Front RR Rear W Width direction WA Wall surface

Claims (4)

A fall prevention device used for an installation whose movement in the back direction is restricted by the wall surface of the building,
a lower frame installed on the installation surface along the front-rear direction of the installation object;
It is fixed to the lower surface of the installation object and arranged on the lower frame, and moves forward on the lower frame and forward when a force acts on the installation object in a forward moving direction. an upper pedestal configured such that the portion can move upward;
a restraining part interposed between the upper part of the installation object and the wall surface, suppressing the movement of the upper part away from the wall surface and allowing the installation object to incline with respect to the wall surface;
anti-tip device. The restraint part has a first member fixed to the wall surface and a second member fixed to the upper part of the installation object,
The overturn prevention device according to claim 1, wherein the second member is restrained from moving forward with respect to the first member, and is allowed to rotate when viewed from the side of the installed object. A slit extending in the front-rear direction of the installation object is formed in the first member,
The second member is provided with an insertion portion extending in the front-rear direction of the installation object,
The insertion part is inserted into the slit from below, and the rear side of the insertion part moves in a direction away from the slit relative to the front side of the insertion part when viewed from the side of the installation object. 3. The overturn prevention device according to claim 2, which is configured to be capable of The upper frame has front wheels and rear wheels that roll on the lower frame,
In an initial state, the shaft of the front wheel is fitted in a groove provided in the lower frame and having an open front,
The overturn prevention device according to any one of claims 1 to 3, wherein the shaft of the rear wheel is inserted through a guide hole provided in the lower frame and extending in the front-rear direction.

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