JP3469799B2 - Shelf storage fall prevention device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing falling of stored items on a shelf that suitably prevents the stored items placed on a shelf such as a fixed shelf or a moving rack from falling.

[0002]

2. Description of the Related Art Generally, a shelf represented by a fixed shelf or a moving rack is such that a book, a document, or the like placed on the shelf is placed between the upper and lower shelves when vibration occurs due to an earthquake or the like. There is a problem that it is easy to fall from the opening formed in the above, and especially if the stored item placed on the upper shelf plate falls, it may pose a danger to the user.

For this reason, a drop prevention member is fixedly provided along the width direction of the opening surface in the substantially vertical center of the opening surface formed between the upper and lower shelves to prevent the stored items from falling through the opening. There are things I do. However, this product has a problem in that the fall prevention member hinders the work of taking in and out each time a stored item is taken in and out. In consideration of such a problem, normally, when standing by at a standby position that substantially overlaps with the shelf board, and when vibration occurs due to an earthquake, etc., from the standby position to the locking position located at the vertical center of the opening surface. There is one that automatically rotates to prevent the contents from falling.

[0004]

However, in this rotary type, since the fall prevention member rotates away from the opening surface of the shelf until it rotates from the standby position to the predetermined locking position, the locking structure is locked. It is not possible to sufficiently prevent the fall of the stored items during the rotation until reaching the position. Further, in order to lock the fall prevention member in the locking position, a special locking mechanism is required, and when the fall prevention member is provided on a plurality of shelves, it is complicated to interlock the plurality of fall prevention members. There is also a problem that an interlocking mechanism is required.

[0005]

In order to solve the above-mentioned inconvenience, the present invention is designed so that a rod-shaped fall prevention member is slid vertically along an opening surface of a shelf from a standby position to a locking position. ing.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION That is, the present invention relates to a storage item fall prevention device for a shelf which prevents a storage item placed on a shelf plate from dropping, and an opening formed between adjacent upper and lower shelf plates. and anti-drop rod-shaped member sliding in the vertical direction from a standby position substantially overlapping with by shelf plate disposed along the width direction of the surface to the locking position can prevent the fall of stored articles, the fall preventing member wait
Hold the machine at the machine position and wait for the fall prevention member.
Retracted by immersive operation and release its holding state
Holding part and fall prevention provided on multiple shelf boards
Interlocking part that can interlock the immersing operation of each holding part that holds the member
The fall prevention member is held at the standby position, and the holding state is released when vibration due to an earthquake or the like is detected, and a plurality of fall prevention members can be slid all together.
And a guide member attached to the front wall of the shelf that can guide the fall prevention member released from the holding state along the vertical direction of the opening surface from the standby position to the locking position. It is characterized by being provided.

[0007] With such a structure, at a normal time, it is located at the standby position and does not prevent the storage of articles, but when vibration occurs due to an earthquake or the like, the fall prevention member is locked from the standby position. It slides along the opening surface to the position to prevent falling of stored items from the opening. Moreover, since this one slides up and down along the opening surface of the shelf from the standby position to the locking position, it can be moved to the locking position more quickly than the rotary type, and it can also slide. It is possible to prevent falling of stored items at any position inside. Furthermore, since this fall prevention member is rod-shaped, compared to the plate-shaped one, even if the shelf is deformed due to an earthquake or the like, the fall prevention member may slide to the locking position without being caught by the column or the like. It's expensive and doesn't take a waiting place. In addition, in this specification, the top plate and the bottom plate which are installed on the upper and lower ends of the shelf are also referred to as shelf plates.

The fall prevention member does not take a waiting place,
Further, in order to improve the appearance of the entire rack, it is desirable that the vertical dimension of the fall prevention member is smaller than the thickness of the shelf plate. Specific embodiments of the fall prevention member include those in which the fall prevention member falls by gravity from the standby position to the locking position and slides, or is biased by the biasing member from the standby position to the locking position. You can list things that slide.

In particular, when the fall prevention member falls due to gravity, the guide member is a substantially housing-like member having at least one side surface into which the fall prevention member can be inserted, and the bottom of the guide member. It is desirable that the position where the fall prevention member contacts the wall is the locking position.

As a concrete embodiment of the holding mechanism,
The holding mechanism is a solenoid that can immerse the output shaft that is normally in a protruding state when it detects vibrations such as an earthquake.
An example of the device includes a holding portion which is provided at the tip of the output shaft, holds the fall prevention member in the standby position, and releases the holding state by the retracting operation of the output shaft.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, a case where the stored article drop prevention device A of the present invention is applied to a moving rack device B will be described. The moving rack device B is used for a library or the like, and as shown in FIG. 1, a plurality of racks 2 serving as shelves are arranged on rails 1 laid in parallel, and these racks 2 are arranged along the rails 1. Any rack 2 by moving
The structure is such that a passage S can be formed between them.

The rack 2 includes a plurality of columns 21 and a plurality of shelves 22 arranged from the upper ends to the lower ends of the columns 21.
And the left and right side plates 23 arranged on the outer surfaces of the columns 21 at both ends in the width direction of the rack 2. Each rack 2
The opening 3 is provided in the front-rear direction, and the front-rear end surfaces thereof are the opening surfaces 3a. The racks 2 arranged at both ends in the moving direction have the moving-direction end surfaces located at the outer ends thereof closed by the blind panel 24. . In the present embodiment, what is usually called a top plate or a bottom plate, which is arranged at the upper and lower ends of the support column 21,
It is collectively referred to as the shelf plate 22. And this rack 2
Wheels (not shown) capable of rolling on the rail 1 are disposed on the lower surface of the wheel, and driving means for driving the wheels (not shown)
And the rack 2 is movable along the rail 1. The rack 2 that has moved to a predetermined position is locked at that position by an appropriate lock mechanism (not shown), and this lock mechanism is a vibration detection means (not shown).
When the vibration is detected, the lock is released to keep the rack 2 free from the floor surface to prevent the rack 2 from falling over.

In the moving rack device B having such a structure, in this embodiment, the upper and lower shelves 22 adjacent to the rack 2 are arranged.
An article fall prevention device A is arranged on the opening surface 3a of the opening 3 formed therebetween to prevent the articles C such as documents and books placed on the shelf 22 from falling. In this embodiment, among the plurality of shelf boards 22 arranged on the rack 2,
Particularly, the stored item fall prevention device A is arranged in the upper three stages which is dangerous when the stored item C falls.

As shown in FIGS. 2 to 6, the storage fall prevention device A is stored from a standby position P arranged along the width direction of the opening surface 3a of the rack 2 and substantially overlapping the upper shelf plate 22. A rod-shaped fall prevention member 4 that slides up and down to a locking position Q that can prevent the fall of the object C, and the fall prevention member 4 is held at a standby position P, and the holding state is detected by vibration such as an earthquake. A holding mechanism 5 for releasing the holding state and a guide member 6 for guiding the fall prevention member 4 released from the holding state from the standby position P to the locking position Q along the vertical direction of the opening surface 3a. It becomes.

The fall prevention member 4 is a rod-shaped member having a circular cross section whose diameter is smaller than the thickness of the shelf plate 22, and is arranged horizontally along the width direction of the rack 2. The holding mechanisms 5 are arranged in pairs on the columns 21 at both ends of the rack 2 in the width direction, and form a pair on the left and right.
Solenoid 51 which is de-energized when the vibration detecting device detects vibration due to an earthquake
The spring receiving member 52 fixed to the tip 511a of the output shaft 511, and the output shaft 511 retracts into the solenoid 51 via the spring receiving member 52 when the solenoid 51 is de-energized. A torsion coil spring 54 that urges the spring support member 52, and a holding portion 53 that projects from the spring receiving member 52 to hold the fall prevention member 4 at the standby position P and to release the held state by the retracting operation of the output shaft 511. Be prepared.

The solenoid 51 is fixed to the inside of the columns 21 at both ends of the rack 2 in the width direction by an appropriate means, and electromagnetic energy generated by energizing an AC or DC exciting coil is output to the output shaft. Although it is a well-known plunger type electromagnet that converts into forward / backward movement of 511, the solenoid 51 of the present embodiment holds the output shaft 511 in a protruding state when energized, and when the vibration detection device detects vibration, The energization is released so that the output shaft 511 can be retracted into the solenoid 51. Then, the output shaft 511
The rear wall 521 of the spring receiving member 52 having a thin and substantially housing shape with an open front surface is fixed to the front end 511a of the front wall 521, and the holding portion 53 projects from the front surface of the rear wall 521. In the present embodiment, the stored object drop prevention device A is arranged on the upper three shelves 22 of all the shelves 22, but the spring receiving member 52 is used.
Are continuously provided in the vertical direction over the upper three-tier shelf plates 22,
The holding portion 53 is projected from the position corresponding to each shelf plate 22, and the solenoids 51 are arranged at two positions corresponding to the upper and lower shelf plates 22 of the upper three-stage shelf plates 22. 3 upper shelves with 2 solenoids 51 in the direction
The second fall prevention member 4 is slid together.

The holding portion 53 has its base end 53a fixed to the rear wall 521 of the spring receiving member 52, and the front end 53b protruding forward from the base end 53a is connected to the front wall 211 of the column 21 and the guide member 6. An insertion hole 211a formed in the rear wall 61,
It is inserted from the inside of the column 21 into the inside of the guide member 6 via 61a. Then, the left and right ends 4a of the fall prevention member 4 are placed on the tip 53b inserted into the guide member 6, and the fall prevention member 4 is placed in the standby position P.
I am trying to hold it. Then, a torsion coil spring 54 having one end abutted on the rear wall 521 of the spring receiving member 52 and the other end abutted on the front wall 211 of the support column 21 is wound around the outer periphery of the holding portion 53 on the base end 53a side, and the solenoid When the energization of 51 is released, the spring receiving member 52 is urged toward the solenoid 51 to output the output shaft 511.
Is immersed in the solenoid 51.

The guide member 6 is in the form of a thin casing having an open inner side surface. The top wall 62 is located substantially at the same position as the upper surface of the upper shelf plate 22, and the bottom wall 63 is in the vertical direction of the opening surface 3. A rear wall 61 is fixed to the front wall 211 of the column 21 arranged at both ends in the width direction by an appropriate means so as to be located in the approximate center. That is, the stored object fall prevention device A normally holds the fall prevention member 4 at the standby position P, which is a position substantially overlapping the front surface of the upper shelf plate 22 by the holding mechanism 5, to prevent an earthquake or the like. When the vibration occurs, the holding state by the holding mechanism 5 is released, the gravity is dropped from the standby position P by gravity, and the left and right end portions 4a are slid while being guided by the guide member 6, and on the bottom wall 63 of the guide member 6. The position where the fall prevention member 4 is brought into contact with and locked is defined as the locking position Q of the fall prevention member 4.

Next, the operation of the contained article fall prevention device A will be described. Normally, since the solenoid 51 is in the energized state, the output shaft 511 projects forward,
As shown by the solid line in FIG. 4 and the imaginary line in FIG. 6, the fall prevention member 4 is placed on the holding portion 53 and stands by at the standby position P located on the front surface of the upper shelf plate 22. In such a state, vibration occurs due to an earthquake or the like, and when the vibration detecting unit detects the vibration, the energization of the solenoid 51 is released, and the output shaft 511 is biased by the torsion coil spring 54 and retracts into the solenoid 51. . Therefore, the phantom line in FIG. 3 and FIG.
Also, as shown by the solid line in FIG. 6, the holding portion 53 also retracts into the support column 21 and retracts from below the fall prevention member 4. As a result, the fall prevention member 4 falls downward along the opening surface 3a due to gravity, and the fall is locked and locked by the bottom wall 63 of the guide member 6 near substantially the center of the opening surface 3a in the vertical direction. Held in position Q.

With such a structure, at the normal time, it is located at the standby position P and does not interfere with the putting in and out of the stored items C. However, when vibration occurs due to an earthquake or the like, the fall prevention member 4 moves to the standby position. It slides along the opening surface 3 from P to the locking position Q to prevent the stored item C from falling from the opening 3. Moreover,
Since this item slides along the opening surface 3 of the rack 2 from the standby position P to the locking position Q by gravity, it can be moved to the locking position Q more quickly than the rotary type, and The falling of the stored item C can be prevented at any position during the slide. Furthermore, this fall prevention member 4
Since the rod has a rod shape, compared to the plate-shaped one, even if the rack 2 is deformed due to an earthquake or the like, the fall prevention member 4 is more likely to slide to the locking position Q without being caught by the deformed pillar or the like. Also, do not take a waiting place.

When the fall prevention member 4 is returned from the locking position Q to the standby position P, it is returned manually or by an appropriate means. Since the diameter of the fall prevention member 4 is smaller than the thickness of the shelf plate 22, if it is arranged so as to substantially overlap with the shelf plate 22, a waiting place is not taken and the rack 2 as a whole looks good.

Since the fall prevention member 4 falls from the standby position P to the locking position Q by gravity and slides, the fall prevention member 4 can be easily attached to the opening surface 3a without providing a special slide mechanism. Can be slid along. Further, the guide member 6 is a substantially casing-like member having an opening on the inner side surface side into which the left and right end portions 4a of the fall prevention member 4 can be inserted, and the fall prevention member 4 is provided on the bottom wall 63 of the guide member 6. Since the abutting position is the locking position Q, it is possible to reliably and stably lock the fall prevention member 4 at the locking position Q without providing a separate lock mechanism.

Since the fall prevention member 4 is disposed on the plurality of shelf plates 22, particularly on the upper shelf plate 22, the fall of the stored item C can be effectively prevented and the user's item C can be prevented. It is possible to ensure safety. The holding mechanism 5 is fixed to the solenoid 51 that holds the output shaft 511 in a protruding state when energized and is de-energized when the vibration detection device detects vibration due to an earthquake or the like, and the tip 511a of the output shaft 511. The spring receiving member 52 and the output shaft 511 via the spring receiving member 52 when the solenoid 51 is de-energized.
The torsion coil spring 54 for urging the solenoid 51 into the solenoid 51, and the fall prevention member 4 projecting from the spring receiving member 52 for holding the fall prevention member 4 at the standby position P and the output shaft 511 for holding the same. And a holding portion 53 for releasing the spring holding member 52 corresponding to each shelf plate 22 in the present embodiment.
Since the spring receiving member 52 also functions as an interlocking member that can interlock the immersing operation of each holding portion 53, three springs are prevented in the upper three steps as in the above-described embodiment. Not only when the members 4 are arranged, but also when the fall prevention members 4 are arranged on all the shelf plates 22, the shelf plates 2 arranged at the upper and lower ends are arranged.
By providing a pair of vertical solenoids in the vicinity of 2, it is possible to easily design a mechanism capable of commonly interlocking the slide of the fall prevention member 4 in all the shelf plates 22.

Further, in the present embodiment, the vibration detecting device for unlocking the lock mechanism when the vibration is detected is also used to set ON / OFF of the power supply for energizing the solenoid 51. It prevents the score from increasing.
The specific configuration of each unit is not limited to the above-described embodiment. For example, the shelf is not limited to the rack 2 of the moving rack device B as in this embodiment, and may be a fixed shelf or the like. In addition, in this embodiment, the top 3 of all shelf boards
Although the fall prevention member is arranged in the step, it goes without saying that the fall prevention member may be provided on all shelf boards. Further, an elastic member for elastically urging the fall prevention member 4 downward may be provided, and the fall prevention member 4 may be slid vertically by this elastic member. Further, an appropriate elevating mechanism that can slide the fall prevention member from the lower side to the upper side may be provided. Further, in this embodiment, the immersing operation of the output shaft is performed by the bias of the torsion coil spring, but the immersing operation of the output shaft may be performed by the electromagnetic energy of the solenoid. Other configurations can be variously modified without departing from the spirit of the present invention.

[0025]

The present invention is carried out in the form as described above, and has the following effects. That is, according to the present invention, the fall prevention member for preventing the fall of the stored items is made into a rod shape, and the fall prevention member is slid vertically along the opening surface of the shelf from the standby position to the locking position. Therefore, at normal times, it is located at the standby position and does not interfere with the loading and unloading of stored items, and in the event of vibration such as an earthquake, the stored items can be effectively prevented from dropping from the opening to improve user safety. Can be secured. Moreover, this one is
As it slides vertically from the standby position to the locking position along the opening surface of the shelf, it enables quicker movement to the locking position compared to the rotating type, and it can be stored at any position during sliding. It is possible to prevent the falling of objects. Furthermore, since this fall prevention member is rod-shaped, compared to the plate-shaped one, even if the shelf is deformed due to an earthquake or the like, the fall prevention member does not get caught on the shelf body such as the support pillar and slides to the locking position. There is a high possibility that there will be no waiting place.

If the vertical dimension of the fall-preventing member is smaller than the thickness of the shelf board, particularly when the falling-prevention member is arranged so as to substantially overlap the shelf board, a waiting place can be saved and the appearance can be improved. If the fall prevention member slides by dropping due to gravity from the standby position to the locking position, the fall prevention member can be suitably slid with a simple structure without providing a special slide mechanism.

Further, at this time, the guide member has a substantially housing shape with at least one side surface into which the fall prevention member can be inserted, and the position where the fall prevention member contacts the bottom wall of the guide member. Is the locking position, the fall prevention member can be reliably and stably locked in the locking position without providing a complicated mechanism. If the fall prevention member slides while being biased by the biasing member from the standby position to the locking position, it becomes easy to appropriately set the sliding speed and the like.

If the fall prevention member is provided on a plurality of shelves, the fall of stored items can be effectively prevented, and the safety of the user can be further improved. Further, in this case, if an interlocking mechanism capable of simultaneously sliding a plurality of fall prevention members is provided, it becomes possible to respond more quickly in the event of an earthquake, and the fall prevention member once slid to the locking position. Can also be easily returned to the standby position.

The holding mechanism holds the solenoid that allows the output shaft, which is normally in a protruding state, to be retracted when vibration due to an earthquake or the like is detected, and the fall prevention member provided at the tip of the output shaft at the standby position. Along with the holding portion for releasing the holding state by the immersing operation of the output shaft together, for example, by providing a pair of vertical solenoids near the shelf plate provided at the upper and lower ends of the shelf, It is possible to easily design a mechanism capable of commonly interlocking the slides of the fall prevention members on all the shelves.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing the main part.

FIG. 3 is a schematic cross-sectional view for explaining the same action.

FIG. 4 is a cross-sectional view taken along the line I-I in FIG. 3 for explaining the same action.

5 is a cross-sectional view taken along the line I-I in FIG. 3 for explaining the same action.

FIG. 6 is a front view for explaining the same action.

[Explanation of symbols]

2 ... Shelf 22 ... Shelf board 3 ... Opening surface 4 fall prevention member 5 ... Holding mechanism 51 ... Solenoid 511 ... Output shaft 53 ... Holding unit 6 ... Guide member 63 ... bottom wall A: Storage item fall prevention device C ... Storage P ... Standby position Q: Locking position

Claims (6)

(57) [Claims] 1. A storage item fall prevention device for a shelf for preventing a fall of a storage item placed on a shelf plate, the device being arranged along a width direction of an opening face formed between adjacent upper and lower shelf plates. A rod-shaped fall prevention member that slides in the up-down direction from a standby position that is substantially overlapped with the shelf board to a locking position that can prevent the fall of the stored items ;
Retract from the standby position of the fall prevention member by the immersion operation,
The holding part that releases the holding state and the
Immersion movement of each holding part that holds the fall prevention member installed
; And a coupling member capable of interlocking the work, the holding state holds the fall preventing member in the standby position is released when detecting vibration due to an earthquake or the like, a plurality of fall prevention member
A holding mechanism that allows the slides to be slid simultaneously, and a fall prevention member that has been released from the held state can be guided from the standby position to the locked position along the vertical direction of the opening surface and attached to the front wall of the shelf. A storage item fall prevention device for a shelf, comprising: a guide member. 2. An apparatus according to claim 1, wherein the vertical dimension of the fall prevention member is smaller than the thickness of the shelf plate. 3. The shelving material fall prevention device according to claim 1, wherein the fall prevention member falls from the standby position to the locking position by gravity and slides. 4. The guide member is of a substantially housing shape in which at least one side surface into which the fall prevention member can be inserted is opened, and the bottom wall of the guide member is locked at a position where the fall prevention member abuts. The storage item fall prevention device for a shelf according to claim 3, wherein the device is a position. 5. The shelf fall prevention according to claim 1, wherein the fall prevention member slides from a standby position to a locking position by being biased by a biasing member. apparatus. 6. A solenoid that allows a holding mechanism to retract an output shaft that is normally in a protruding state when vibration due to an earthquake or the like is detected, and a fall prevention member provided at the tip of the output shaft at a standby position. 7. The shelf fall prevention device according to claim 1, further comprising: a holding portion that holds and releases the holding state when the output shaft is retracted.