JP2009301575A - Fall prevention device and vending machine provided therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fall prevention device, which inexpensively and surely prevents fall of an installation. <P>SOLUTION: The fall prevention device 1 for preventing fall of the installation 30 installed on a floor surface 40 includes a device 2 interposed between the installation 30 and the floor surface 40, which is provided with a regulation means 4 which regulates the horizontal movement of the installation 30 and support means 10a and 10b which are brought into contact with the floor surface 40 when the installation 30 is inclined. The support means 10a and 10b support the installation 30 so as to be horizontally movable while the regulation by the regulation means 4 is released by the inclination of the installation 30. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fall prevention device for preventing a fall of an installation body such as a vending machine installed on a floor surface.

  For example, a configuration disclosed in Patent Document 1 is known as a device that prevents a tall and heavy installation body such as a vending machine, furniture, locker, cabinet, and refrigerator from falling down. As shown in FIG. 6 (a), the fall prevention device 50 normally has support legs 52, 52 housed inside the installation body 54, and is locked when the installation body vibrates due to the occurrence of an earthquake or the like. The engagement state between the piece 56 and the locking claw 58 is released, and the weight member 60 falls due to its own weight. As a result, the link rods 62 and 62 project in the horizontal direction, the support legs 52 and 52 protrude outward from the installation body 54, and the inclined installation body 54 has one support leg as shown in FIG. 52. The support legs 52 and 52 include rollers 64 and 64 that come into contact with the floor surface, and the load on the support legs 52 and 52 is reduced by the rolling of the rollers 64 and 64.

  JP 11-103959 A

  In the conventional fall prevention device described above, the support legs 52 and 52 protruding from the installation body 54 need to be configured so that they can be stored so that they do not interfere with the normal operation. Therefore, the structure is complicated, resulting in high costs and malfunctions. There was a risk of this.

  In addition, since there is a limit in absorbing the vibration energy received by the support leg 52 from the installation body 54 only by the rolling of the roller 64, the support legs 52 and 52 may be damaged or the installation body 54 may be damaged when the vibration is large. There was a problem that might fall.

  Then, this invention aims at provision of the fall prevention apparatus which can prevent the fall of an installation body cheaply and reliably.

    The object of the present invention is an overturn prevention device for preventing the installation body installed on the floor from toppling over, in the apparatus body interposed between the installation body and the floor surface, the horizontal direction of the installation body And a support means that comes into contact with the floor surface when the installation body is inclined. The support means is in a state in which the restriction by the restriction means is released by the inclination of the installation body. Thus, this is achieved by a fall prevention device characterized in that the installation body is supported so as to be horizontally movable.

  According to the overturn prevention device of the present invention, it is possible to reliably prevent overturn of an installation body such as a vending machine at low cost.

It is a front view of a vending machine provided with the fall prevention device concerning one embodiment of the present invention. It is a principal part side view which shows the structure of the fall prevention apparatus in the vending machine shown in FIG. It is a side view for demonstrating the function of the fall prevention apparatus in the automatic sales shown in FIG. It is a schematic side view of the fall prevention device concerning other embodiments of the present invention. It is a figure which shows an example of a simulation result. It is a longitudinal cross-sectional view of the conventional fall prevention device.

  Hereinafter, actual forms of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of a vending machine provided with a toppling prevention device according to an embodiment of the present invention, and FIG. 2 is a side view of an essential part thereof. The overturn prevention devices 1, 1 are provided along the left and right short sides of the case-like vending machine 30, and are interposed between the vending machine 30 and the floor surface 40. Is supported in an upright state.

  As shown in FIG. 2, the fall prevention device 1 is provided with a movement restricting plate 4 in contact with the floor surface 40 on the lower surface side of the flat plate-like device main body 2, and is fixed to both front and rear sides on the upper surface of the device main body 2. Metal fittings 6a and 6b are attached.

  The movement restricting plate 4 is made of a material having a large frictional resistance with the floor surface 40 such as natural rubber, synthetic rubber, nylon, etc., and restricts horizontal movement of the vending machine 30 when the floor surface 40 vibrates due to an earthquake or the like. Functions as a regulation means. In the present embodiment, a plurality of rectangular movement restriction plates 4 are arranged at intervals in the front-rear direction. However, the shape, number, arrangement and the like are not particularly limited, and the lower surface of the vending machine 30 is also limited. You may provide in the whole.

  The fixing brackets 6 a and 6 b are inserted through holes 8 a and 8 b through which the height-adjustable legs (leveling legs) 32 and 32 provided at the four corners of the lower surface of the vending machine 30, and the front and rear of the apparatus main body 2. Rollers 10a and 10b are provided on both sides. The fall prevention device 1 can be attached to the vending machine 30 by using other attachment means as long as the vending machine 30 and the fall prevention device 1 are integrally fixed, for example, the vending machine 30. It may be attached by screwing the leg portion directly into the apparatus main body 2 or the like.

  The rollers 10a and 10b are provided so that a gap is formed between the rollers 10a and 10b in a normal state, and roll in contact with the floor surface 40 when the vending machine 30 is inclined in the front-rear direction. The size of the gap with the floor surface 40 is different between the rollers 10a and 10b, and the gap t1 between the roller 10a arranged on the front side and the floor surface 40 is different from the roller 10b arranged on the rear side and the floor surface. It is set to be larger than the gap t2 with respect to 40. As a result, when the vending machine 30 is tilted, the maximum forward tilt angle θ1 is larger than the maximum rearward tilt angle θ2, as shown in FIG. Here, the maximum inclination angles θ1 and θ2 are the inclinations of the vending machine 30 from the state in which the vending machine 30 is actually installed on a flat and highly rigid floor surface until the rollers 10a and 10b contact the floor surface 40. Is an angle.

  If the values of θ1 and θ2 are too large, the vending machine 30 may fall over. On the other hand, if the values of θ1 and θ2 are too small, the functions of the rollers 10a and 10b may not be performed sufficiently. When it is, it is preferable that it exists in the range of 2-12 degrees, 2-4 degrees is more preferable, and 2-3 degrees is still more preferable.

  With respect to the maximum rearward inclination angle θ2, when a wall surface is present on the rear side, movement to the rear side is restricted by the wall surface, so that the function of restoring the wall can be enhanced and the seismic isolation effect can be enhanced. From this viewpoint, it is preferable to make it smaller than θ1. Specifically, θ2 can be set to approximately 0 °. When θ2 is approximately 0 °, the friction between the movement restricting plate 4 and the floor surface 40 is reduced by the contact between the roller 10b on the rear side and the floor surface 40, but the frictional resistance with the floor surface 40 is reduced. A state in which the vending machine 30 is movable rearward.

Generally, if the height of the center of gravity is H and the distance between the tilted fulcrum and the projection point on the bottom of the center of gravity is L, the fulcrum is tilted by θc (= arctan (H / L)) Since the center of gravity is located above the vertical axis, the angle θc becomes the limit angle (risk angle) to fall over if tilted further. On the other hand, if the inclination angle is larger than 0, the function of preventing the fall occurs.

  Considering the above, the values of θ1 and θ2 are preferably 0 ≦ θ2 ≦ θ1 ≦ 0.8θc, and more preferably 0 ≦ θ2 <θ1 ≦ 0.5θc. In this numerical range, as θ1 and θ2 are smaller, the amount of movement of the installation body (based on the ground) due to the earthquake is larger, but on the other hand, there is an advantage that the seismic isolation effect is higher (propagation vibration is smaller). Conversely, as θ1 and θ2 are larger, the amount of movement of the installation body (based on the ground) due to the earthquake is smaller, but the seismic isolation effect is smaller.

  According to the vending machine 30 including the overturn prevention device 1 configured as described above, when horizontal vibration is generated on the floor surface 40 due to an earthquake or the like, if the vibration is small, the movement restriction plate 4 and the floor surface 40. The movement of the vending machine 30 in the horizontal direction is regulated by the frictional resistance generated between the vending machine and the vending machine 30 is held in its original standing state. When the vibration of the floor surface 40 becomes large to some extent, the vibration energy cannot be absorbed only by the frictional resistance described above, and the vending machine 30 starts to swing back and forth. As shown in FIG. 3, when the vending machine 30 is about to fall forward, the roller 10a on the front side comes into contact with the floor surface 40 when the inclination angle θ1 is reached, and the vending machine 30 is supported in an inclined state. The In this state, since most of the movement restricting plate 4 is separated from the floor surface 40, a sufficient movement restricting force does not act in the horizontal direction, and the vending machine 30 moves forward by the rolling of the roller 10a. Thus, when the vibration energy acting on the vending machine 30 is large, a part of this energy can be absorbed as moving energy, so that the vending machine 30 can be reliably prevented from falling.

  On the other hand, when the vending machine 30 tilts backward, the roller 10b on the rear side contacts the floor surface 40 to support the vending machine 30, and the roller 10b rolls to move the vending machine 30 backward. By doing so, the vending machine 30 is prevented from overturning in the same manner as described above. In the present embodiment, since the rollers 10a and 10b are arranged such that the maximum forward tilt angle θ1 is larger than the maximum rearward tilt angle θ2, the vending machine 30 has the same size in the front and rear directions. When shaking occurs, it becomes easier to move backward than forward. Since the backward movement of the vending machine 30 is normally restricted by the rear wall 42 of the installation area, the rollers 10a and 10b are arranged so as to support the vending machine 30 at different inclination angles in the front and rear directions. It becomes easy to automatically return the vending machine 30 to the original installation place, and the vending machine 30 can be prevented from jumping forward more than necessary.

  As mentioned above, although one Embodiment of this invention was described, the specific aspect of this invention is not limited to the said embodiment. For example, in this embodiment, the rollers 10a and 10b are arranged on both front and rear sides of the apparatus main body 2, but when the rear side of the vending machine 30 can be supported by the rear wall 42 of the installation area, The roller 10a may be provided only on the front side of the apparatus main body 2. In this case, the vending machine 30 can be reliably prevented from falling.

  Further, in this embodiment, the moving direction by the rollers 10a and 10b is made to coincide with the horizontal component of the inclination direction of the vending machine 30, but for example, the moving direction is made obliquely forward, etc. The directions of the rollers 10a and 10b may be set as appropriate so that the vending machine 30 moves in a safe direction (for example, a direction toward the side wall of the installation area) when the vending machine 30 moves. Moreover, it can also be comprised so that the direction of each roller 10a, 10b can be rotated and it can fix at a desired angle so that the user himself can adjust the moving direction by each roller 10a, 10b.

  In this embodiment, the rollers 10a and 10b are used as support means for supporting the vending machine 30 by contacting the floor surface 40 when the vending machine 30 is inclined. Other configurations may be used as long as they can be supported so as to be movable. For example, a spherical rolling element or a block-shaped sliding body having a low frictional resistance may be provided instead of the rollers 10a and 10b.

  Moreover, in this embodiment, although the case where the fall prevention apparatus 1 was attached to the vending machine 30 was demonstrated to the example, the fall prevention apparatus of this invention is applied to various installation bodies, such as furniture, a locker, a cabinet, and a refrigerator. Is possible. The fall prevention device of the present invention does not need to be separable from the installation body, and the apparatus main body may be integrated with the lower part of the installation body.

Moreover, in this embodiment, although the fall prevention apparatuses 1 and 1 are arrange | positioned along the short side of the left and right of the vending machine 30 so that the vending machine 30 can prevent the fall to the front-back direction, The shape and arrangement of the prevention device can be appropriately set according to the shape of the installation body. For example, when there is a possibility that the installation body may fall in an arbitrary direction, a movement restricting plate is provided at the center of the lower surface of the apparatus main body that is approximately the same size as the installation body, and a spherical rolling element, a block-like sliding body, etc. A plurality of support means can be arranged at appropriate intervals along the outer edge of the apparatus main body (for example, arranged at the four corners when the outer edge is square). In this case, the moving direction of the installation body due to an earthquake or the like can be controlled by making the inclination angles of the respective support means different.

  In the present embodiment, the movement restricting plate 4 is used as a means for restricting the installation body. For example, an engagement piece inserted into an installation hole formed in the floor surface 40 is provided on the lower surface of the apparatus main body 2 or the like. The movement of the installation body can be restricted by providing the engagement between the installation hole and the engagement piece. In this case, the insertion depth of the engagement piece is set so that the engagement between the installation hole and the engagement piece is released when the installation body is inclined.

  Further, a low-rebound cushioning material may be provided at a place where a collision with the wall surface of the installation area is assumed due to the movement or inclination of the installation body, such as the end of the fall prevention device 1 or the upper edge of the installation body. As a result, the impact and rebound caused by the collision with the wall surface can be alleviated, the fall due to the reaction can be surely prevented, and the installation body and the wall surface can be prevented from being damaged. When attaching the cushioning material to the rear surface of the installation body, it is preferable from the simulation result described later that the attachment height is higher than the middle in order to reduce the moving distance to the front. A single cushioning material may be disposed at the center in the width direction, or a plurality of cushioning materials may be disposed on both sides of the rear surface.

  Examples of the buffer material include foamed resin and foamed rubber, and in particular, a flexible urethane foam (40-fold foaming) having a low coefficient of restitution can be preferably used. As described above, when the cushioning material is attached to the rear surface of the installation body, the rebound caused by the collision with the wall surface can be suppressed. Therefore, in order to sufficiently exhibit the automatic restoration function, the maximum rearward inclination angle θ2 is substantially set. It is preferable to set to 0 °.

  When it is particularly necessary to prevent the vehicle from toppling forward, as shown in FIG. 4, the protruding member 20 is accommodated in the apparatus body 2, and auxiliary rollers 10 c and 10 d are respectively provided at the front and rear portions of the protruding member 20. By providing, the protruding member 20 may protrude toward the front of the apparatus main body 2 so that the auxiliary roller 10c on the front side contacts the floor surface 40 when the vending machine 30 is inclined. In FIG. 4, the same components as those in FIG. 1 are denoted by the same reference numerals.

  In this configuration, a plurality of wedge-shaped stoppers 22 are provided on the lower surface in the apparatus main body 2 at intervals with a tip disposed so that the front end faces rearward. The rear auxiliary roller 10 d can roll forward along the inclined surface 22 a of the stopper 22, while the backward movement is restricted by the step portion 22 b of the stopper 22. By setting the inclination angle of the inclined surface 22a to, for example, about 10 °, the state in which the protruding member 20 is accommodated for the earthquake motion whose acceleration does not exceed 1.8 m / s 2 is maintained, while the large earthquake motion exceeding this On the other hand, the protruding member 20 jumps forward, and can be prevented from falling.

  An end stopper 24 is disposed in front of the stopper 22 group in a direction opposite to these stoppers 22, and the rear auxiliary roller 10 d is restricted from moving forward by the step portion 24 b of the end stopper 24. .

According to the fall prevention device 1a configured in this manner, in a normal state, since the protruding member 20 is accommodated in the apparatus main body 2, the protruding member 20 is obstructive when the vending machine 30 is used. There is no risk of becoming. When a shake due to an earthquake or the like occurs, the protruding member 20 protrudes forward from the state shown in FIG. 4A to the state shown in FIG.
The auxiliary roller 10c disposed on the front side of the floor can come into contact with the floor surface 40. As a result, when the restriction by the movement restricting plate 4 is released due to the inclination of the vending machine 30, in addition to the rollers 10a and 10b functioning as support means as in the configuration of FIG. 2, the auxiliary roller 10c is auxiliary supported. Functions as a means.

  Since the protruding member 20 can move only forward with respect to the apparatus main body 2, the protruding length of the protruding member 20 from the apparatus main body 2 gradually increases with time. As will be apparent from the simulation results described later, the longer the front part of the overturn prevention device 1a protrudes forward from the front surface of the vending machine 30 (that is, the length from the front surface of the vending machine 30 to the auxiliary roller 10c). As the length increases, the fall prevention performance can be improved by increasing the moment of inertia. It is preferable that the projecting member 20 has a rigidity that does not yield to the inclination of the vending machine 30 so that such an effect can be reliably obtained.

  In the case of the configuration including the protruding member 20, since the seismic isolation effect is enhanced, the values of θ1 and θ2 are set so that the forward jumping can be minimized and the collision speed to the rear wall surface can be reduced. A numerical range in which the numerical range represented by the above inequality is shifted slightly upward is preferable.

In the configuration shown in FIG. 4, the auxiliary rollers 10 c and 10 d may have other configurations such as a spherical rolling element and a block-shaped sliding body having a low frictional resistance, like the rollers 10 a and 10 b described above. Further, the configuration of the stopper 22 is not necessarily limited to the configuration of FIG. 4 as long as it allows the protruding member 20 to protrude forward while restricting backward movement.
(1) Examination by simulation a. Maximum Inclination Angle In order to confirm the effect of the present invention, the finite element analysis software “LS-DYNA” was used to examine the seismic overturning property of the vending machine equipped with the overturn prevention device according to the present invention. The target vending machine was a thin type (width 995 mm, depth 440 mm, height 1810 mm) with a center of gravity at the center, and a mass of 380 kg. An example of the output image of the FEM simulation is shown in FIG.

The mounting position of the vending machine back cushioning material was set to a height position of 1/4 from the upper surface of the vending machine (see FIG. 5). The material and outer dimensions of the cushioning material were determined from the coefficient of restitution and the cushioning performance, and were each a flexible urethane foam having a foaming ratio of about 40 times and 1000 × 250 × 130 mm.

For Examples 1 to 3 using the maximum forward tilt angle θ1 and the maximum rearward tilt angle θ2 as parameters, a sine wave corresponding to seismic intensity 7 (uniaxial vibration in the front-rear direction, frequency 1 Hz, vibration acceleration 8 m) Table 1 shows the simulation results for earthquake resistance when applying seismic waves of / s2 and vibration time of 10 seconds.

  As shown in Examples 1 to 3 in Table 1, with respect to the overturn prevention performance, none of the vending machines fell over and good results were obtained. Regarding the maximum forward tilt angle θ1, considering the space normally present in front of the vending machine, the moving distance of the vending machine to the front is within the allowable range even in the case of 2 ° (Example 1). However, if this is set to 3 ° (Example 2), the moving distance can be further reduced. However, the maximum inclination angle θ1 here is an angle in a state where deformation due to the weight of the vending machine is not taken into consideration (the same applies to θ2 described later).

  On the other hand, with respect to the maximum rearward inclination angle θ2, a wall surface exists on the back side of the vending machine, and a shock absorber is present between the vending machine and the wall surface, so that the inclination angle is 0.1 °. Even so, falls can be effectively prevented. When θ2 in Example 3 is −0.1 °, in the actual vending machine installation state, the load is shared by the supporting means on the rear side by the weight of the vending machine from the beginning (that is, automatic The actual measured value with the vending machine installed is approximately 0 °). In this case, the moving distance of the vending machine forward is further reduced.

Moreover, as a comparative example with respect to Examples 1 to 3, Table 1 shows the results when a vending machine is installed as usual without providing a fall prevention device and an earthquake wave is applied. The seismic wave fell as a result of a sine wave having a vibration acceleration of 3 m / s 2 after about 6 seconds, even though it gave a smaller vibration (equivalent to a seismic intensity of 6) than in the case of Examples 1 to 3.

  As described above, the optimum maximum inclination angles θ1 and θ2 of the vending machine in the actual installation state on the flat and highly rigid floor surface are such that the front side θ1 is 2 to 3 ° and the rear side θ2 is substantially 0. °.

b. Next, the effect of the mounting height (position) of the cushioning material attached to the back of the vending machine on the fall prevention performance was investigated. In Embodiments 4 and 5, θ1 is 2 ° and θ2 is −1 ° (approximately 0 ° in an actual installation state), and vibration is performed under the same vibration conditions (corresponding to seismic intensity 6 strong). The simulation results are shown in Table 2.

  As shown in Table 2, both Examples 4 and 5 can prevent overturning, but the forward moving distance can be reduced by setting the mounting position of the cushioning material above the middle.

c. Next, the influence of the protrusion length at which the front part of the overturn prevention device protrudes forward from the front of the vending machine on the overturn prevention performance was investigated. In Examples 6 to 8, vibration is performed under the same vibration condition (corresponding to strong seismic intensity 6) with θ1 being 4 ° and θ2 being −0.1 ° (approximately 0 ° in an actual installation state). The simulation results are shown in Table 3.

  As shown in Table 3, any of Examples 6 to 8 can prevent overturning, but the longer the projecting length of the front part of the apparatus, the shorter the forward moving distance.

(2) Verification using prototype A vibration experiment was actually performed using the vending machine and the overturn prevention device used in the above simulation. The maximum inclination angles θ1 and θ2 were set to 2 ° and 0 °, respectively.

  For four types of sine waves (frequency and half amplitude: 1Hz 45mm, 1.5Hz 42mm, 1.8Hz 40mm, 2Hz 35mm), horizontal unidirectional excitation (equivalent to vibrations 5-6) and horizontal and vertical simultaneous excitation When shaking (corresponding to seismic intensity 6 weak to 6 strong) was performed for 30 seconds each, the vending machine did not fall down in any case, and the automatic return from the front side to the original position could be confirmed.

DESCRIPTION OF SYMBOLS 1 Fall prevention apparatus 2 Apparatus main body 4 Movement control board 6a, 6b Fixing bracket 8a, 8b Insertion hole 10a, 10b Roller 30 Vending machine 32 Leg part 40 Floor surface

Claims (10)

A fall prevention device for preventing the installation body installed on the floor from falling,
The apparatus main body interposed between the installation body and the floor surface is provided with restriction means for restricting the horizontal movement of the installation body and support means for contacting the floor surface when the installation body is inclined. ,
The fall prevention device, wherein the support means supports the installation body so as to be horizontally movable in a state where the regulation by the regulation means is released by the inclination of the installation body. 2. The overturn prevention device according to claim 1, wherein the support means is disposed on both sides of the installation portion, and supports the installation body at different inclination angles. The overturn prevention device according to claim 1 or 2, wherein the support means includes a roller. The fall prevention device according to any one of claims 1 to 3, wherein the regulating means regulates movement of the installation body by frictional resistance with the floor surface. The apparatus main body includes a projecting member accommodated so as to project forward, and stopper means for restricting the rearward movement of the projecting member,
The said protrusion member is equipped with the auxiliary | assistant support means which supports the said installation body so that a horizontal movement is possible when the restriction | limiting by the said restriction means is cancelled | released by the inclination of the said installation body in the state protruded ahead. The fall prevention device according to any one of the above. The fall prevention device according to any one of claims 1 to 5, wherein the installation body is supported such that a maximum forward tilt angle is larger than a maximum rear tilt angle. The fall prevention device according to claim 6, wherein a maximum forward tilt angle is 2 to 12 °. The fall prevention device according to claim 6 or 7, wherein a maximum rearward inclination angle is approximately 0 °. A vending machine comprising the overturn prevention device according to any one of claims 1 to 8. The vending machine according to claim 9, wherein a cushioning material is attached above the middle of the rear surface.

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