JP2001037567A - Device for preventing fall of stored article from rack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for preventing the fall of stored articles on racks, that is simple in arrangement, that is low-cost, and that takes only a short time, from the occurrence of an earthquake, to assume an attitude for preventing the fall of the stored articles. SOLUTION: This device has a fall prevention means energized for oscillation, the means having a horizontal member 20 provided at the end of an oscillating member 16. One end of a guide groove 22 in the oscillating member 16 serves as an engaging groove 24, and the oscillating member 16 is oscillatable about a shaft 14 within the range of the guide groove and is slidable in the direction of its depth within the range of an oblong hole 17. Normally, the engaging groove 24 and a pin 28 are in engagement with each other to regulate the oscillation of the oscillating member 16 and the horizontal member 20 is present in a position where it does not affect the operation of taking articles in and out. When earthquake motion equal to or greater than a certain magnitude occurs, the oscillating member 16 moves by sliding within the range of the oblong hole 17 and the engaging groove 24 and the pin 28 are disengaged from each other, after which an energizing force causes the oscillating member 16 to oscillate about the shaft 14 within the range of the guide groove 22, causing the horizontal member 20 to move onto an article taking face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing articles stored in shelves from falling due to vibrations such as earthquakes.

[0002]

2. Description of the Related Art When vibrations occur due to an earthquake or the like, the shelves also vibrate, and articles stored in the shelves fall from the shelves,
After falling on the shelf, it falls from the shelf. The article dropped from the shelf board is damaged by the impact. If the stored article is easily broken, it is broken by falling, and if it is easily deformed, it is deformed by falling. If the stored items are heavy, the floor may be damaged by falling, and at that time, there is a possibility that human beings may be harmed if there is a person nearby. Also, if the stored article is a chemical or the like, it falls and the container breaks, and when mixed with other chemicals,
A toxic gas may be generated or ignited by a chemical reaction.

[0003] In view of the above, various means for preventing stored articles from dropping on shelves have been considered. The simplest fall prevention means is
The upper edge of the front end of the shelf is protruded upward so as not to hinder the loading and unloading of the articles, and the projecting edges are intended to prevent the articles from falling. However, according to this fall prevention means, it is not possible to expect the effect of preventing the article from falling against a large swing of the shelf.

[0004] In order to ensure the effect of preventing the article from falling when vibrating due to an earthquake or the like, the fall prevention member is made movable, and usually the fall prevention member is located at a position where it does not hinder the taking in and out of the article. For example, a fall prevention device has been proposed in which a fall prevention member is moved to an article loading / unloading surface when a vibration exceeding a certain level occurs due to, for example, preventing a stored article from falling off a shelf.

[0005] As an example of such a conventional movable article fall prevention device, an invention described in Japanese Patent No. 2826811 is known. This allows the stored article fall prevention member to be movable in a range from a position that does not affect the entry and exit of articles to a position on the article entry / exit surface,
The movable article is urged to move to the article loading / unloading surface, and locked by the locking means in a state where the stored article drop prevention member is moved to a position that does not affect article loading / unloading against the biasing force. In the above, a pendulum with a weight that swings by vibration is provided, and energy when the pendulum swings is transmitted to the locking means via an appropriate intervening member, and the locking means is moved to prevent the stored article from falling. Is released, and the stored article fall prevention member is advanced to the article loading / unloading surface by the urging force.

[0006] The conventional movable article drop prevention device as described above requires a large number of parts including a weighted pendulum and has a drawback in that the configuration is complicated. In addition, the number of movable parts increases, and there is a disadvantage that a time delay occurs from the occurrence of vibration due to an earthquake or the like to the movement of the stored article fall prevention member to the stored article drop prevention position.

[0007] The stored article fall prevention member is driven by a motor, and the motor is driven by a detection signal of a seismic device that detects a certain level of vibration and moves the stored article fall prevention member to the stored article drop prevention position. Although it is conceivable, the driving mechanism of the stored article fall prevention member using a motor causes a high cost, and in this case,
There is a drawback in that a time delay occurs when the stored article drop prevention member moves to the stored article drop prevention position from occurrence of vibration due to an earthquake or the like.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and has a simple structure, is inexpensive, and prevents falling of stored articles from occurrence of vibration due to an earthquake or the like. It is an object of the present invention to provide a device for preventing a stored article from falling on a shelf, which can shorten the time required until the player takes a posture. Another object of the present invention is to provide a storage article drop prevention device for a shelf that can stably maintain the storage article drop prevention posture even after the shelf continuously vibrates after the storage article fall prevention posture is taken. And

[0009]

According to the first aspect of the present invention,
A swinging member, a biasing means for biasing the swinging member in one direction, a horizontal member provided at an end of the swinging member for preventing stored articles from dropping, and the swinging member. A shaft, which is provided on any of the supports that swingably support the swing member, serves as a swing center of the swing member, and the swing member and the support that swingably supports the swing member. Either one of the long hole provided in any one of the above, the shaft penetrating and extending in the depth direction orthogonal to the frontage surface of the shelf, and the swinging member and a supporter for swingably supporting the swinging member. A pin provided on one of the swinging member and a support member for swingably supporting the swinging member, and a guide groove through which the pin penetrates to guide the swinging of the swinging member. The guide groove of the swing member has an engagement structure in which at least one end is bent. The swinging member is swingable about the axis within the range of the guide groove, and is slidable in the depth direction within the range of the long hole. The swing of the swing member is regulated by the engagement of the engagement groove and the pin of the guide groove,
The horizontal member is located at a position that does not affect the taking in and out of the article, and when a certain level of vibration occurs, the vibration causes the rocking member to slide within the range of the elongated hole and form at one end of the guide groove. The engagement between the engaged groove and the pin is released, and the swinging member swings about the shaft within the range of the guide groove by the urging force, so that the horizontal member moves to the article loading / unloading surface. To prevent the stored articles from falling.

According to a second aspect of the present invention, in the first aspect of the present invention, the guide groove is bent at both ends to have engagement grooves at both ends, and a certain amount of vibration is generated, and the engagement groove at one end and the pin Is released and the swinging member swings by the urging force, the swinging member is in the inclined position, and the swinging member slides within the range of the elongated hole due to the load, and the swinging member moves to the other end of the guide groove. The rocking member is prevented from rattling by engaging the pin with the formed engaging groove.

[0011] The invention according to claim 3 is the invention according to claim 1 or 2.
In the invention described above, the swinging member has a counterweight, and the swinging member is urged to swing in one direction by the counterweight. According to a fourth aspect of the present invention, in the third aspect, the counterweights are formed integrally with the swing member.

According to a fifth aspect of the present invention, a swinging member, a biasing means for biasing the swinging member in one direction, and an end of the swinging member for preventing a stored article from falling are provided. A horizontal member provided, a support member for supporting the swing member in a swingable manner, a locking shaft provided in the support member, and a groove provided in the swing member and in which the locking shaft fits. The groove has an intermediate portion in which the locking shaft is loosely fitted, and a narrow portion continuing on both sides of the intermediate portion. When the rocking member is in a position where the rocking member is not affected, the rocking member is engaged to regulate the rocking of the rocking member due to the urging force. The engagement with the stop shaft is released, and when the locking shaft is located at the intermediate portion of the groove, the drop prevention means exerts an urging force. Therefore, the horizontal member moves to the article loading / unloading surface, and the other narrow portion has the locking shaft fitted when the horizontal member is moving to the article loading / unloading surface, and the swing member has It is characterized by preventing rattling.

According to a sixth aspect of the present invention, a swinging member, a biasing means for biasing the swinging member in one direction, and an end portion of the swinging member for preventing the stored articles from falling are provided. The horizontal member and the swing member swing against the urging force, and at least one of the swing members is made unswingable in a state where the horizontal member is at a position where it does not affect the taking in and out of the article. It has an actuator that regulates and seismic sensing means that detects and outputs a signal when a certain level of vibration occurs,
Activate the actuator with the detection signal from the seismic means,
The regulation of the swinging member is released, the swinging member is swung by the urging force, and the horizontal member is moved to the article loading / unloading surface to prevent the stored articles from dropping.

According to a seventh aspect of the present invention, in the sixth aspect, the actuator comprises a solenoid with a plunger, the solenoid is energized by a detection signal from the seismic sensing means, and the plunger moves to move the swing member. The restriction is lifted.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of the present invention. 1 and 2 show a part of a shelf such as a book shelf or an article storage shelf in which the apparatus of the present invention is incorporated. 1 and 2, a flat rectangular box body 10 is vertically oriented on both ends of an upper surface of a shelf plate 12 attached to a shelf, and
The shelf 12 is fixed in the depth direction. Box 1
Reference numeral 0 denotes a support for a swinging member 16 to be described later, and a shaft 14 is fixed to the box 10 through the box 10 in the thickness direction. A plate-shaped swinging member 16 is supported by the shaft 14 in the vertical direction. Most of the oscillating member 16 is in the box 10, and the elongate hole 17 formed in the oscillating member 16 in the front-rear direction is penetrated by the shaft 14. And is slidably supported in the front and rear directions within the long hole 17. A counter weight 18 is integrally formed on the back side of the swing member 16. In the illustrated example, the swing member 16 itself is used as the counterweight 18 by forming the back side of the swing member 16 to be longer in the depth direction and longer in height.

The front side of the swing member 16 extends obliquely downward, and its front end is bent downward along the front surface of the shelf 12. The swing member 16 has a U-shaped guide groove 22 between the slot 17 and the counter weight 18.
Are formed. The pin 28 penetrating the U-shaped guide groove 22 penetrates the box body 10 in the thickness direction and is fixed to the box body 10, so that the swing member 16 is moved vertically within the guide groove 22. It can swing inside. The lower end and the upper end of the guide groove 22 are bent forward in a hook shape to form engagement grooves 24 and 26, respectively.
The engagement grooves 24 and 26 have an engagement structure in which the pin 28 can be engaged.

The swing member 16 includes a counter weight 18
The front side is urged upward in the upward direction, but normally the front end swings to a position where the front end faces the front surface of the shelf plate 12 against the urging force. The pin 28 is engaged with the groove 24, and the swing by the urging force is regulated.

In the normal state shown in FIG. 1, when an earthquake occurs and the shelf vibrates, the swinging member 16 also vibrates and slides in the longitudinal direction within the range of the elongated hole 17 and the engaging groove 24. When the swing member 16 slides forward, the engagement between the pin 28 and the engagement groove 24 is released, and the swing member 1
Numeral 6 swings around the shaft 14 in a direction in which the front side rises due to the weight of the counterweight 18. Guide groove 2
Since 2 is formed along an arc centered on the shaft 14, it moves downward such that the guide groove 22 is guided by the pin 28 by the above swing. When the swinging member 16 swings as described above, the load of the counterweight 18 is applied diagonally downward, in FIG. 1, toward the lower right, and the swinging member 16 is slid obliquely downward in the depth direction. Is engaged with the pin 28 to prevent rattling of the swinging member 16 and prevent the swinging member 16 from returning to its original position.

The oscillating members 16 configured and operated as described above are provided on both sides of the shelf plate 12 to form a pair, and the tip ends of the pair of oscillating members 16 are horizontal to prevent the articles from falling. They are connected by a member 20. The pair of swing members 16
The horizontal member 20 constitutes a fall prevention unit. This fall prevention means is provided by the counter weight 18.
Thereby, the horizontal member 20 is urged to swing in a direction of moving toward the article loading / unloading surface. Horizontal member 20
Is usually located at a position facing the front surface of the shelf plate 12 so as not to hinder the transfer of articles into and out of the shelf plate 12, but when the swing member 16 swings due to the earthquake as described above, the horizontal member Numeral 20 advances to an appropriate height position in front of the article storage space stored on the shelf 12 to prevent the articles from falling off the shelf due to the vibration of the shelf.

In order to return the swinging member 16 which has been swung by the earthquake to its original position, the horizontal member 20 is pulled obliquely upward and forward to disengage the pin 28 from the engagement groove 26, and
0 is depressed downward to swing the swinging member 16, and is pushed backward at the swing limit position to engage the engaging groove 24 with the pin 28.

According to the embodiment described above with reference to FIGS. 1 and 2, the swing member 16 urged to swing by the counterweight 18 can be slid in the depth direction of the shelf by vibrations caused by an earthquake or the like. When the moving member 16 slides, the engagement between the engaging groove 24 formed at one end of the guide groove 22 and the pin 28 is released, and the swing member 16 is moved by the urging force in the range of the guide groove 22. Rocked within
Horizontal member 2 for connecting the distal ends of a pair of rocking members 16
0 is moved to the article loading / unloading surface to prevent the fall of the stored articles, so that the configuration is extremely simple, the number of parts is small, and a low-cost article drop prevention apparatus for a shelf can be provided. it can. In addition, since the configuration is extremely simple and the number of parts is small, the time required from the occurrence of vibration due to an earthquake or the like to the posture for preventing falling of stored items can be shortened. Can be provided.

Further, once the stored article fall prevention posture is set, the swinging member 16 is slid obliquely downward, and the engaging groove 26 at the other end of the guide groove 22 is
, The rattling of the swinging member 16 thereafter is prevented, and there is also an advantage that the stored article drop prevention posture can be stably maintained even if the shelf continuously vibrates.

It should be noted that the formation of the engagement groove 26 at the other end of the guide groove 22 may be omitted if there is no problem in the swinging member 16 after the stored article fall prevention posture is taken.
On the other hand, even if the engagement groove 26 is formed,
In the state where the horizontal member 20 is in the stored article fall prevention posture,
When the stored article hits the horizontal member 20, the swinging member 16 is slid to disengage the engagement groove 26 and the pin 28, and when a component that happens to push down the horizontal member 20 happens to act, the horizontal member 20 is moved. It is conceivable that the article falls and the stored article drop prevention posture is canceled. Therefore, as shown by a dotted line in FIG. 1, it is preferable to form an engagement groove 58 bent toward the opposite side to the engagement groove 26 following the upper end of the guide groove 22. That is, the upper end of the guide groove 22 is formed in a T shape. If the engagement groove 58 is formed, the stored article hits the horizontal member 20 in the state where the horizontal member 20 has the stored article drop prevention posture as described above, and the swing member 16
Is slid forward, this time the engagement groove 58
Engages with the pin 28, and at this time, even if a component that pushes down the horizontal member 20 acts, the posture of the horizontal member 20 to prevent the stored articles from falling is maintained.

In the embodiment shown in FIGS. 1 and 2, a shaft 14 and a pin 28 are provided on a box 10 serving as a support for swingably supporting a swinging member 16, and the shaft is provided on the swinging member 16 side. 1
4. Slot 17 and guide groove 22 penetrated by pin 28
On the other hand, a long hole 17 and a guide groove 22 are formed in the box 10, and the shaft 14 and the pin 28
May be provided. In short, a long hole 17 is formed in one of the box body 10 and the swing member 16, and a shaft 14 is provided in the other,
The guide groove 2 is formed in one of the box 10 and the swinging member 16.
2 and the other end may be provided with a pin 28.

The directions of the engagement grooves 24 and 26 formed continuously at both ends of the guide groove 22 in the above embodiment may be opposite to each other as shown in FIG. In the example shown in FIG. 3, the lower engagement groove 24 is formed by being bent toward the back of the shelf, contrary to the example shown in FIG.
In this example, in a normal state, the swing member 16 is slightly slid forward to engage the engagement groove 24 with the pin 28,
This engagement is released by vibrations caused by an earthquake or the like, and thereafter, it operates in the same manner as in the embodiment shown in FIGS. 1 and 2 to move to the horizontal member 20 article loading / unloading surface to prevent the stored articles from dropping. To take.

In order to more stably maintain the posture in which the horizontal member 20 moves to the article loading / unloading surface to prevent the stored articles from dropping, the engagement grooves 26 with which the pins 28 are engaged may be devised. In the embodiment shown in FIG.
A gently curved leaf spring 30 is arranged, and when the top of the leaf spring 30 advances into the entrance passage of the pin 28 into the engagement groove 26, when the pin 28 enters the engagement groove 26, the leaf spring 30
To overcome the elasticity of the leaf spring 30 to get over the top. Therefore, in order to disengage the pin 28 from the engagement groove 26, it is necessary to overcome the elasticity of the leaf spring 30, and the engagement between the pin 28 and the engagement groove 26 is unlikely to be disengaged. The article falling prevention posture can be stably maintained.

The positional relationship between the shaft 14 and the long hole 17 and the pin 28 and the guide groove 22 may be opposite to each other in the front-rear direction. For example, in the example shown in FIG.
Shaft 14 and slot 17, pin 28 and guide groove 22
May be interchanged, and the direction of the guide groove 22 may be reversed left and right. Also, the shaft 14 and the long hole 17,
Counter weight 18, pin 28 and guide groove 22
, That is, the pin 28 and the guide groove 22
It may be arranged at a position farther than the counterweight 18 from the positions of the holes 4 and the long holes 17. Further, depending on the positional relationship between the shaft 14 and the long hole 17 and the pin 28 and the guide groove 22 in the front-rear direction, the counter is intentionally taken into consideration due to the weight distribution of the fall prevention means to the shaft 14 which is the swing center of the fall prevention means. The swing can be urged in one direction without providing a weight. The embodiment shown in FIG. 5 is an example.

In FIG. 5, an arm 34 is integrally attached to the upper surface of the swing member 32, and the arm 34 extends toward the front of the shelf (to the left in FIG. 5). Like the above-described embodiment, the swing member 32 is formed with the long hole 17 and the guide groove 22.
The shaft 14 and the pin 28 provided on a suitable support respectively penetrate therethrough. However, the long hole 17 and the shaft 14 are located at the rear part of the swing member 32, and the guide groove 22 and the pin 28 are located at the front part of the swing member 32. The swing member 32 and the arm 34 are a pair of two arranged at the left and right ends of one shelf plate when the shelf is viewed from the front. They are connected by a horizontal member 20 for preventing falling. The pair of swinging members 32, the pair of arms 34, and the horizontal member 20 constitute a fall prevention unit.

The above-mentioned fall prevention means can swing about the shaft 14, but the arm 34 extends forward from the swing member 32.
The horizontal member 20 is urged to swing so as to descend. The upper and lower ends of the guide groove 22 are formed so as to be bent rearward, and form engagement grooves 24 and 26, respectively. The fall prevention means is normally swung upward against the urging force, and the pin 28 is
Is held in a state of being engaged with. At this time, the arm 34
Has a substantially horizontal posture, and the horizontal member 20 is present, for example, in the vicinity of the front end ceiling of the upper shelf plate and at a position where there is no influence on taking in and out of articles.

Now, when vibration occurs due to an earthquake or the like, the fall prevention means including the swinging member 32 rattles and slides back and forth within the range of the long hole 17, so that the engagement between the engagement groove 24 and the pin 28 is stopped. It is released. The falling prevention means swings counterclockwise in FIG. 5 by the urging force due to the imbalance in weight distribution with respect to the shaft 14, and the horizontal member 20 descends. The swing of the fall prevention means is restricted in the range of the guide groove 22, and takes an inclined posture as shown by a chain line in FIG. As a result, the fall prevention means slides obliquely downward within the range of the long hole 17, and the pin 28 engages with the engagement groove 26, whereby the inclined posture of the fall prevention means is stably maintained. The posture of the fall prevention means is a posture in which the horizontal member 20 moves to the article loading / unloading surface of the shelf to prevent the stored articles from falling.

According to the embodiment shown in FIG. 5, since the fall prevention means is urged to swing in one direction by the weight distribution to the shaft 14, the urging means such as a spring or a weight is used. There is no need to provide them separately, so that the configuration can be further simplified and the number of parts can be reduced. In addition, since the configuration is simple, it is possible to obtain a shelf drop prevention device having good responsiveness to vibration such as an earthquake, as in the above-described embodiment. In this embodiment, even when a force is applied to the horizontal member 20 to slide the horizontal member 20 forward when the horizontal member 20 is in the stored article falling prevention position and the stored article hits the horizontal member 20, this force is maintained. It does not act as a force to release the engagement between the engaging groove 26 and the pin 28, but rather acts as a force to more stably hold the above-mentioned engagement. can do.

In the embodiment shown in FIG.
An elongated hole 17 is formed in one of the box 10 and the swing member 16, and a shaft 14 is provided in the other of the box 10 and the swing member 16.
The guide groove 22 is formed in one of the
May be provided. Slot 17 and shaft 14, guide groove 2
The positional relationship between the pin 2 and the pin 28 in the front-rear direction is also arbitrary.
In addition, in the embodiment shown in FIG. 5 and in the other embodiments, in order to urge the fall prevention means in one direction, an urging force by an elastic body such as a spring is supplementarily added. Or it may be urged only by the elastic body.

In the embodiment described above, the engagement groove following the end of the guide groove 22 is
Although the direction was clearly different from that of the guide groove, any shape may be used as long as the pins can be engaged at both ends of the guide groove, for example, a crescent shape or a semicircular shape as a whole. , And may smoothly continue with the guide groove. In addition, at least one swing member may be provided,
It is not always necessary to use two as a pair. That is, a swing member may be used on one side, and the other end of the horizontal member may be directly supported by the support member on the other side. In this case, the other end of the horizontal member is loosely fitted to the support member. It is more preferable that the other end of the horizontal member is bent and fitted into the elongated hole 17 (see FIGS. 1, 3 and 5).

The apparatus of the present invention can be further modified to have a configuration as shown in FIG. In FIG. 7, a swing member denoted by reference numeral 35 includes a swing plate 38 at an intermediate portion, an arm 36 extending obliquely downward and forward from the swing plate 38, and a counter extending obliquely downward and backward from the swing plate 38. And a weight 40. The rocking plate 38 has a groove 4 in which the locking shaft 42 fits.
Three. However, the locking shaft 42 has a square cross section. The groove 43 has an intermediate portion 44 into which the locking shaft 42 is loosely fitted, and narrow portions 46 and 48 continuing on both sides of the intermediate portion 44.
And One narrow portion 46 extends rearward from the intermediate portion 44, and the other narrow portion 48 extends forward from the intermediate portion 44. The widths of the narrow portions 46 and 48 are substantially the same as the width of the locking shaft 42. The two swing members 35 are paired, and the ends of the pair of arms 36 are
Are connected by

Normally, as shown in FIG. 7, the swing member 35 swings counterclockwise against the urging force due to the presence of the counterweight 40, and the horizontal member 20 affects the taking in and out of articles. And the locking shaft 42 is fitted in the one narrow portion 46. Since the locking shaft 42 has a square cross section and the width of the narrow portion 46 is substantially the same as the width of the locking shaft 42, the swing of the swing member 35 due to the urging force is restricted to the above-described posture. ing. Now
When the swing member 35 rattles due to shaking such as an earthquake, when the intermediate portion 44 of the groove 43 is located at the position of the locking shaft 46, the swing regulation of the swing member 35 is released, and the swing member 35 is attached. The horizontal member 20 is swung clockwise by the force, and moves to the article loading / unloading surface to take a posture for preventing the articles stored on the shelf from dropping. At this time, the swing member 35 is pulled downward by the load of the counterweight 40, and the other narrow portion 48 of the groove 43 is fitted to the locking shaft 42. Since the width of the narrow portion 48 is substantially the same as the width of the locking shaft 42, the swing of the swing member 35 is restricted, and even if the stored article hits or rides on the horizontal member 20, the swing member 35 Will not be returned to its original position. The cross-sectional shape of the locking shaft 42 is not limited to a square shape, but may be rectangular, oval, or trapezoidal.
It suffices if the swing member 35 can be restrained from swinging when it is fitted into the narrow portions 46 and 48 of the groove 43. Therefore, a plurality of pins can be provided side by side, and the plurality of pins can be fitted into the narrow portions 46 and 48 to restrict the swing of the swing member 35.

In the embodiment described so far, if it is desired to react sensitively to vibrations caused by an earthquake, the engagement depth between the engagement groove and the pin is reduced.
However, if the engagement depth is too shallow, even a slight vibration causes the horizontal member to take a stored article drop prevention posture, which is troublesome. Therefore, the degree of the engagement depth is determined by the designer's idea.

Here, an embodiment will be described in which the engagement between the engagement groove and the pin is not released by a slight vibration, and the engagement can be reliably released by a certain level of vibration.
Since the embodiment shown in FIG. 6 is obtained by adding a pendulum to the embodiment shown in FIGS. 1 and 2, the description of the same components as those in the embodiment shown in FIGS. 1 and 2 is omitted. Then, the added components will be mainly described. In FIG. 6, a longitudinal slot 56 is formed on the side of the guide groove 22 in the portion of the counterweight 18 of the swing member 16, and the shaft 52 is fitted through the slot 56. Shaft 52 is rotatable within slot 56 and slot 56
It is possible to move along. The shaft 52 is restricted by hitting the lower end of the elongated hole 56, and the pendulum 50 having the weight 54 attached to the lower end is suspended by the shaft 52. In FIG. 6, a stopper 60 fixed to the support 10 is located immediately near the right side of the pendulum 50 in FIG. Guide groove 22
The engagement depth between the engagement groove 24 and the pin 28 following the lower end is slightly deeper, and in this engagement relationship itself, the engagement cannot be released by a slight vibration.

Now, when a certain level of vibration occurs due to an earthquake or the like, the swing member 16 rattles, and the engaging groove 2
4 moves relative to the pin 28. On the other hand, the swing member 16
Due to the rattling, the pendulum 50 also swings about the shaft 52, and the pendulum 50 hits the stopper 60. Since the pendulum 50 has the weight 54, the pendulum 50 acts as a lever with the contact point with the shaft 52 as a fulcrum, and attempts to move the shaft 52 to the left in FIG. The shaft 52 is a longitudinal slot 5
6 so that the side edge of the long hole 56 is pushed to the left,
A force acts to slide the swinging member 16 to the left. Since this force acts as a force for promoting the disengagement of the engagement groove 24 and the pin 28, the engagement between the engagement groove 24 and the pin 28 is immediately released. As a result, the swing member 16 swings clockwise in FIG. 6 due to the load of the counterweight 18 and the load of the weight 54, and the horizontal member 2
0 moves to the article loading / unloading surface to take the stored article drop prevention posture. Thereafter, the swing member 16 operates as described above,
During the swinging of the swinging member 16, the weight 54 is
And further downward movement is restricted.
Thereafter, the long hole 56 functions as a relief hole for the shaft 52 in order to swing the swing member 16.

According to the embodiment shown in FIG.
While the engagement depth between the pin 4 and the pin 28 is made relatively large to prevent the engagement from being released by a relatively small vibration, the provision of the pendulum 50 with the weight 54 and the stopper 60 makes it possible to achieve a certain degree or more. The pendulum 50 and the stopper 60 facilitate the disengagement of the engagement groove 24 and the pin 28 when vibration occurs, so that the inconvenience that the swing member 16 frequently operates with small vibration is eliminated. In addition, when a certain degree or more of vibration is generated, the swinging member 16 can be reliably operated and moved to the horizontal member 20 article loading / unloading surface to take a stored article drop prevention posture. According to this embodiment, the pendulum 50 with the weight 54 is added.
Can be attached to the swinging member 16, and it is only necessary to add the stopper 60 to make contact with the swinging member 16. Therefore, the structure can be simplified as compared with the conventional article drop prevention device for shelves using a pendulum.

Next, a description will be given of an embodiment in which the stored articles are prevented from falling by an electric seismic signal. 8 and 9, a box 62 serving as a support is provided.
A shaft 64 is attached substantially in the vicinity of the center through the widthwise direction. A disc-shaped engaging member 66 and a lever 74 integrated with the engaging member 66 are arranged in the box 62 so as to be swingable about a shaft 64. Two engaging recesses 68 and 69 are formed on the outer peripheral edge of the engaging member 66 at positions close to each other. An arm 76 is attached to a front end (right end in FIG. 8) of the lever 74. The arm 76 protrudes from the front end face of the box 62 and extends forward from the front end face of the shelf 12. A counter weight 80 is attached to the rear end of the lever 74. The engagement member 66, the lever 74, the arm 76, and the counterweight 80 constitute a swing member 61. The box 62, the lever 74, and the counterweight 80 are arranged in pairs on both left and right ends of the shelf 12. The arm 76 has a length extending over the paired boxes 62, and is formed in a U-shape when viewed from above, and both ends thereof are connected to the front ends of the pair of arms 74. The portion corresponding to the portion is a horizontal member 78. The arm 76 is also bent downward from the middle so that the horizontal member 78 can approach and face the front end surface of the shelf 12.

In the box 62, a solenoid 70 with a plunger 72 is mounted above the engaging member 66 so that the plunger 72 faces downward. The swing member 61 is moved by a counter weight 80 as shown in FIG.
In the normal state shown in FIG. 8, the plunger 72 is rotated in the clockwise direction against the urging force in the normal state shown in FIG. By engaging with 69, the swing of swing member 61 due to the urging force is regulated. In the normal state, the horizontal member 78 is opposed to the front end face of the shelf 12 in the vicinity of the front end, and is in a position where there is no influence on taking in and out of articles. The solenoid 70 is excited by a detection signal from the seismic sensing means, attracts the plunger 72, and engages the plunger 72 with the engagement recess 6.
9 is released. By this disengagement, the swing member 61 swings by the urging force, and the swing is regulated by the contact of the arm 76 with the stopper 90 provided on the box body 62, and the horizontal member 78 moves to the article loading / unloading surface. It is designed to take a storage article fall prevention posture. The excitation of the solenoid 70 is, for example, for 4 to 5 seconds,
After that, the excitation is cut off and the plunger 72 is moved to the solenoid 70.
Move in the direction that protrudes from At this time, the other engaging concave portion 68 of the engaging member 66 is located at a position facing the plunger 72, and the plunger 72 is engaged with the engaging concave portion 68. On the upper surface of the box 62, a test switch 8 for arbitrarily energizing the solenoid 70 to test the operation of the stored article fall prevention device.
2 are installed. The solenoid 70 and the test switch 82 are connected to an external circuit via a connector 88. While the swing members 61 are arranged in pairs on the left and right, the engagement mechanism including the solenoid 70, the engagement member 66, and the like may be arranged on one side, and may not necessarily be arranged on both sides. Good.

Next, an example of the control circuit of the above embodiment will be described. FIG. 10 shows an example of a detection circuit when a certain or more vibration occurs. In FIG. 10, +
Between the-terminal and the-terminal, a seismic switch 85 as a seismic means and a break contact of the timer T1 (hereinafter, the break contact is "b
Contact, make contact is called "a contact") and relay X2
Are connected in series. The seismic switch 85 can be composed of, for example, a mercury acceleration detection switch. When a certain or more vibration is generated, the vibration is detected and turned on. The timer T1 is connected in parallel with the series connection of the contact b of the timer T1 and the relay X2. The a contact of the relay X2 is connected in parallel to the seismic switch 85, and two test switch contacts 86 are connected in parallel. The other contact a of the relay X2 is connected to an external circuit, and outputs a detection signal when a certain level of vibration occurs.

FIG. 11 shows an example of an excitation circuit for the solenoid 70 based on the detection signal. In FIG. 11, +1
The line indicated by + is a plus line of the DC power supply, and the line indicated by +2 is a when the relay X2 is excited.
G is a plus (+) line of the DC power supply supplied through the contact, and G is a ground (-) line. These three lines are connected to the contacts of the solenoid 70 and the test switch 82 in the box 62 shown in FIG. That is, between the plus line +1 and the ground line G, the a contact 83 of the test switch 82 and the solenoid 70 are connected in series, and the plus line +
A contact 84 of a test switch 82 and a solenoid 70 are connected in series between the ground line G and the ground line G.

Now, when a vibration exceeding a certain level occurs, FIG.
The contact of the seismic switch 85 shown in FIG.
Is energized, and the timer T1 is energized. Timer T
Reference numeral 1 denotes a timer for controlling the energization time to the solenoid 70, and turns off its b contact when an appropriate time elapses after the start of energization. The energization time is, for example, 0 to 10
It can be set arbitrarily within the range of seconds. When the relay X2 is excited, the plunger 72 shown in FIG. 8 is attracted to disengage the engagement with the engagement recess 69, the swing member 61 swings by the urging force, and the horizontal member 78 shifts to the stored article drop prevention posture. Take. Since the excitation of the solenoid 70 is continued for the time set by the timer T1, the engagement between the plunger 72 and the engagement recess 69 is released, and the swing by the biasing force of the swing member 61 is reliably performed. Also, even if the contact of the seismic switch 85 is turned off during that time, the excitation of the solenoid 70 is maintained because the relay X2 is held at its a contact.

When the time set by the timer T1 has elapsed, the contact b is turned off, and the excitation of the relay X2 is stopped.
The contact A is turned off and the output of the detection signal is interrupted.
, The power supply to the +2 line is cut off, and the excitation of the solenoid 70 is cut off. The plunger 72 shown in FIG.
Since the engaging member 66 is engaged with the engaging concave portion 68, the horizontal member 78 is pushed back to the original position even if the swing member 61 rattles or the stored article rides on the horizontal member 78. However, the stored article falling prevention posture is maintained.

To return the horizontal member 78 to its original position, the test switch 82 is pressed to turn on the a contact 83 shown in FIG.
Power is supplied to the solenoid from the +1 line to excite it.
As a result, the plunger 72 retreats from the engagement recess 68, and in this state, the horizontal member 78 is pushed down to swing the swing member 61 to the original position against the urging force, and the operation of the test switch 82 is released. . As a result, the excitation of the solenoid 70 is cut off, the plunger 72 returns, and engages with the engaging concave portion 69 of the engaging member 66, so that the horizontal member 78 can be held at a position that does not affect the taking in and out of the article. When the test switch 82 is pressed, b shown in FIG.
The power supply is +
The wraparound from line 1 to line +2 is avoided.

By pressing the test switch 82, the operation test of the storage article drop prevention device can be performed.
When the test switch 82 is pressed, the plunger 72 is retracted by the excitation of the solenoid 70 as described above, and
1 is disengaged from the engagement recess 69, so that the swing member 61
Swings, and the horizontal member 78 takes a stored article falling prevention posture. If the swing member 61 does not swing, it means that there is an abnormality somewhere.

The detection circuit portion shown in FIG.
However, the solenoid drive circuit shown in FIG. 11 is provided for each one of the stored article fall prevention devices.

According to the embodiment shown in FIGS.
In order to operate the storage article drop prevention device by the electric seismic signal, the engagement between the plunger 72 and the engagement member 66 is directly released by the solenoid 70, and the storage member is dropped by the urging force of the swing member 61. Since the swinging member 61 is swung to the prevention position, the number of components is small with a simple configuration, and accordingly, after the detection signal is output from the seismic sensing means, the swing member 61 swings to the storage item drop prevention position. The required time can be shortened.

In the embodiment shown in FIGS.
Instead of the solenoid 70, an appropriate actuator such as a motor or a linear motor can be used.

In any of the embodiments, the urging of the oscillating member is performed by using a counterweight or by utilizing the unbalance of the weight distribution of the oscillating member. For example, a biasing means such as a spring may be added to the counterweight as described above or to the use of the imbalance of the weight distribution of the swing member. In any of the embodiments in which the horizontal member moves upward from the bottom to take a stored article drop prevention posture, the horizontal member is in a posture that does not affect the taking in and out of the article, and the horizontal member is located on the shelf board below the article mounting surface of the shelf board. Although present at a position facing the front end surface, the posture may be such that the user rides on the upper edge of the front end of the shelf. This posture does not hinder the loading and unloading of articles. Rather, even if there is a slight delay in the operation of the swinging member when a certain level of vibration occurs, the horizontal member has the effect of preventing the falling of the articles unless the stored articles jump up so much.

[0052]

According to the first aspect of the present invention, any one of the swinging member and the supporting member for swingably supporting the swinging member is provided.
A long hole extending through the shaft and extending in the depth direction perpendicular to the front face of the shelf, and a guide groove formed through a pin to guide the swing of the swing member are formed. The shaft and the pin are provided on any of the supports that can be supported, and at least one end of the guide groove of the swing member is bent to form an engagement groove, and the swing member includes the shaft. Around the guide groove, and slidable in the depth direction within the above-mentioned elongated hole.Before a certain degree of vibration occurs, the engaging groove of the guide groove and the fixing pin are fixed. The engagement restricts the rocking of the rocking member, and the horizontal member is located at a position that does not affect the taking in and out of the articles. When a vibration exceeding a certain level occurs, the rocking member causes the rocking member to move in the slot. Engagement formed at one end of the guide groove by sliding within the range And the pin is released, and the swinging member swings about the shaft within the guide groove by the urging force, so that the horizontal member moves to the article loading / unloading surface and prevents the stored articles from dropping. Therefore, the structure is extremely simple, the number of parts is small, and a low-cost shelf fall prevention device can be provided. In addition, since the configuration is extremely simple and the number of parts is small, the time required from the occurrence of vibration due to an earthquake or the like to the posture for preventing falling of stored items can be shortened. Can be provided.

According to the second aspect of the present invention, in the first aspect of the present invention, the guide groove is bent at both ends and has an engagement groove at both ends. When the engagement between the pin and the pin is released and the swinging member swings by the urging force, the swinging member is in the inclined position, and the swinging member slides within the range of the elongated hole due to the load, and the other end of the guide groove. Since the swinging member is prevented from rattling by engaging the above-mentioned pin with the engaging groove formed at the end, once the storage article fall prevention posture is taken, the shelf is continuously Even if it vibrates, the stored article fall prevention posture can be stably maintained.

According to the fifth aspect of the present invention, there is provided a swinging member and a horizontal member for connecting the leading ends of the swinging member and for preventing the stored articles from dropping, and swinging in one direction. The swing member has a locking groove into which the shaft is fitted, and the locking groove extends to an intermediate portion where the locking shaft is loosely fitted, and to both sides of the intermediate portion. A rocking member formed by the engagement shaft when the horizontal member is at a position where the horizontal member is not affected by taking in and out of the article; The swinging member is slid by the vibration of a certain degree or more, whereby the engagement with the locking shaft is released, and the locking shaft is positioned at an intermediate portion of the locking groove. When the fall prevention means, the horizontal member is moved to the article loading / unloading surface by the urging force, and the other narrow portion is horizontal. When the material is moving to the article loading / unloading surface, the locking shaft is fitted to prevent the swinging member from rattling, so the configuration is extremely simple, the number of parts is small, and It is possible to provide an apparatus for preventing falling items on a shelf at a low cost. In addition, since the configuration is extremely simple and the number of parts is small, the time required from the occurrence of vibration due to an earthquake or the like to the posture for preventing falling of stored items can be shortened. Can be provided.

According to the invention as set forth in claim 6 or 7, when the storage article drop prevention device is operated by an electric seismic signal, the engagement between the actuator and the engagement member is directly released by the actuator. The swinging member is swung to the stored article drop prevention position by the urging force, so the structure is simple and the number of components is small, and after the detection signal is output from the seismic sensing means, the swinging member is stored. The time required to swing to the article falling prevention position can be shortened.

[Brief description of the drawings]

FIG. 1 is a side view showing a part of an embodiment of a device for preventing a stored article from falling on a shelf according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view showing a part of another embodiment of the device of the present invention.

FIG. 4 is a side view showing a main part of still another embodiment of the device of the present invention.

FIG. 5 is a side view showing a part of still another embodiment of the device of the present invention.

FIG. 6 is a side view showing a part of still another embodiment of the device of the present invention.

FIG. 7 is a side view showing a part of still another embodiment of the device of the present invention.

FIG. 8 is a side view showing a part of still another embodiment of the device of the present invention.

FIG. 9 is a plan view of the same.

FIG. 10 is a circuit diagram showing an example of a vibration detection circuit portion of the embodiment.

FIG. 11 is a circuit diagram showing an example of an actuator drive circuit portion of the embodiment.

[Explanation of symbols]

 Reference Signs List 10 Box as support 12 Shelf 14 Shaft 16 Swing member 17 Slot 18 Counterweight 20 Horizontal member 22 Guide groove 24 Engagement groove 26 Engagement groove 28 Pin 35 Swinging member 40 Counterweight 42 Locking shaft 43 Groove 44 Intermediate portion 46 Narrow portion 48 Narrow portion 61 Swinging member 70 Solenoid as actuator 78 Horizontal member 80 Counterweight

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Michihiro Tsuchiyama 3-8-1, Kamimakumamoto, Kumamoto City, Kumamoto Prefecture Inside Kongo Corporation (72) Inventor Hiroaki Okamura 3-8-1, Kamimakumamoto, Kumamoto City, Kumamoto Prefecture Kongo Co., Ltd. (72) Inventor Tadashi Tanaka 3-81-1, Kumakumamoto, Kumamoto City, Kumamoto Prefecture Kongo Co., Ltd. (72) Inventor Shigeru Araki 3-81, Kumakumamoto, Kumamoto City, Kumamoto Prefecture Kongo Co., Ltd. 72) Inventor Shiro Miyazaki 3-81-1, Kumakumamoto, Kumamoto City, Kumamoto Prefecture Inside Kongo Co., Ltd. (72) Inventor Mitsuo Komori 3-8-1, Kamimakumamoto, Kumamoto City, Kumamoto Prefecture Kongo F-Term (reference) 3B118 FA21 FA22

Claims (7)

[Claims] An oscillating member, an urging means for oscillating the oscillating member in one direction, a horizontal member provided at an end of the oscillating member to prevent a stored article from falling, A shaft, which is provided on one of the swinging member and a supporting member for swingably supporting the swinging member, is a swing center of the swinging member, and supports the swinging member and the swingable member. A slot provided in any of the supports, penetrating the shaft and extending in a depth direction orthogonal to the frontage surface of the shelf; and a support member for supporting the swing member and the swing member in a swingable manner. A pin provided on any one of them; and a member provided on any of the swinging member and a supporting member for swingably supporting the swinging member, wherein the pin penetrates to guide the swinging of the swinging member. At least one end of the guide groove of the swinging member is bent. The swing member is swingable about the axis within the range of the guide groove, and is slidable in the depth direction within the range of the elongated hole. Before the occurrence of the rotation, the rocking of the rocking member is regulated by the engagement of the engaging groove and the pin of the guide groove, and the horizontal member is located at a position that does not affect the taking in and out of the article. When the above-mentioned vibration occurs, the vibration causes the rocking member to slide within the range of the elongated hole, and the engagement between the engagement groove formed at one end of the guide groove and the pin is released. The article on the shelf, wherein the member swings about the axis within the range of the guide groove by the urging force, so that the horizontal member moves to the article loading / unloading surface to prevent the stored articles from dropping. Fall prevention device. 2. The guide groove is bent at both ends and has an engagement groove at both ends. Vibration exceeding a certain level is generated, and the engagement between the engagement groove at one end and the pin is released, and the swing member is biased by the urging force. When the rocking member swings, the rocking member is in an inclined state, and the rocking member slides within the range of the elongated hole due to the load, and the pin engages with the engagement groove formed at the other end of the guide groove. 2. The device according to claim 1, wherein the swinging member is prevented from rattling. 3. The swing member has a counterweight,
3. The apparatus according to claim 1, wherein the swinging member is urged to swing in one direction by the counterweight. 4. The device according to claim 3, wherein the counterweights are formed integrally with the swing member. 5. A swinging member, a biasing means for biasing the swinging member in one direction, a horizontal member provided at an end of the swinging member for preventing stored articles from dropping, A support member for swingably supporting the swing member, a locking shaft provided on the support member, and a groove provided on the swing member and into which the locking shaft fits, The groove has an intermediate portion in which the locking shaft is loosely fitted, and a narrow portion continuing on both sides of the intermediate portion. The one narrow portion is located at a position where the horizontal member does not affect the taking in and out of the article. When the locking shaft is present, the locking shaft engages to restrict the rocking of the rocking member due to the urging force, and the rocking member slides with a certain vibration or more to engage with the locking shaft. When the locking shaft is located in the middle of the groove, the fall prevention means is actuated by the biasing force to move the horizontal When the horizontal member is moving to the article loading / unloading surface, the locking shaft is fitted and the swinging member rattles. A storage article drop prevention device for shelves, wherein 6. A swinging member, a biasing means for biasing the swinging member in one direction, a horizontal member provided at an end of the swinging member for preventing stored articles from falling, An actuator for restricting at least one of the rocking members so as not to be rockable in a state in which the rocking member rocks against the urging force and the horizontal member is at a position where the horizontal member is not affected in taking in and out of the article; When the above-mentioned vibration occurs, it has seismic means for detecting the vibration and outputting a signal. The actuator is actuated by the detection signal from the seismic means, and the regulation of the swing member is released. A storage article drop prevention device for a shelf, wherein a swing member is rocked by the urging force, and the horizontal member is moved to an article loading / unloading surface to prevent the storage articles from falling. 7. The shelf storage according to claim 6, wherein the actuator comprises a solenoid with a plunger, and the solenoid is energized by a detection signal from the seismic sensing means, and the plunger moves to release the regulation of the swing member. Article fall prevention device.