JP3541365B2 - Moving shelf safety device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile shelf safety device, and more particularly to a mobile shelf provided with a safety device that prevents a user's body from being pinched between the mobile shelves when an earthquake occurs.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, some moving shelves have an automatic lock release device that releases a locked state of the moving shelves for the purpose of preventing a fall when an earthquake occurs. On the other hand, in the event of an earthquake, simply unlocking the movable shelves may cause a risk of being caught by the mobile shelves moving and moving when there is a person between the movable shelves.
[0003]
Therefore, in order to avoid the danger of being caught between movable shelves, Japanese Patent Laying-Open No. 9-108048 proposes a safety device for a seismic isolation type movable shelf. In this safety device, a strut rod is inserted between the movable shelves when an earthquake occurs, and a safe passage is secured between adjacent movable shelves by the strut rod.
[0004]
[Problems to be solved by the invention]
However, in the safety device that secures a passage by the strut rod described in the above publication, there is a risk that the movable shelf body and the strut rod may come into contact with each other, thereby damaging the movable shelf or deforming the movable shelf. Further, since this safety device operates by an electric action, it may not operate at the time of a power failure or the like. Further, depending on how the strut rods protrude, there is a danger that the strut rods may interfere with entry into or exit from the passage, or may hit the people in the passage with the strut rod.
[0005]
The present invention has been made in view of the above-described problems of the related art, and even in the event of an earthquake, there is a possibility that the moving shelf may fall or a person may be caught between the moving shelves. It is an object of the present invention to provide a safety device for a movable shelf that does not cause any danger and that operates safely without damaging the movable shelf body.
[0006]
[Means for Solving the Problems]
The present invention has solved the above-mentioned problem as follows.
(1) A traveling wheel, and a transmission mechanism for transmitting a driving force to the traveling wheel, a rotating body that rotates following the rotation of the traveling wheel is provided in the transmission mechanism, and a vibration applied to a moving shelf is provided. Providing a vibration detecting means for detecting, when a vibration is detected by the vibration detecting means, a resistor that moves to a contact position where it comes into contact with the rotating body and applies a brake to the rotation of the traveling wheel, The transmission mechanism further includes a lock mechanism that can lock the rotation of the traveling wheel and that unlocks the traveling wheel when vibration is applied, and furthermore, the lock mechanism is used when the vibration is applied. And a means for moving the resistor to the contact position when a vibration is detected by the vibration detecting means by different mechanical means .
[0008]
(2) In the above item (1) , the vibration detecting means normally holds the resistor at a position separated from the rotating body against the elastic force of the elastic member, and at the time of detecting the vibration, A pendulum member for moving the resistor by the elastic force of the elastic member is provided at the contact position.
[0009]
( 3 ) In the above item (2) , the pendulum member of the vibration detecting means is composed of a first pendulum member and a second pendulum member, and the first pendulum member is provided with the second pendulum member, A shock is transmitted so as to be transmitted, and a weight is attached to a lower end of the second pendulum member.
[0010]
(4) In any one of the above items (1) to (3) , a display member is provided to indicate that the resistor is in a contact position with the rotating body.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of a safety device for a mobile shelf according to the present invention will be described with reference to the accompanying drawings.
[0012]
FIG. 1 shows a movable shelf to which the safety device of the present embodiment is applied.
[0013]
A plurality of moving shelves (10) are installed on a rail (12) facing in the left-right direction, and each moving shelf (10) moves left and right by running wheels (14) provided at the left and right ends of its bottom. be able to. The traveling wheel (14) is interlocked with the rotating shaft (19) of the handle (18) via the power transmission mechanism (16), so that the rotational force of the handle (18) can be transmitted to the traveling wheel (14). I have.
[0014]
The power transmission mechanism (16) includes a driving sprocket (20) fixed to the rotating shaft (19), a large sprocket (22) provided thereunder, a small sprocket (24) integrated with the large sprocket (22), a chain ( 26) and the like, and the drive sprocket (20) and the large sprocket (22) are linked via a chain (26). The small sprocket (24) is linked via a chain (30) to a driven sprocket (28) integral with each of the running wheels (14) (14).
[0015]
FIG. 2 is an enlarged view of the power transmission mechanism (16).
[0016]
A drum (32) as a rotating body is fixed to a rotating shaft (19) of the power transmission mechanism (16). A large number of lock holes (32a) are formed in the peripheral surface of the drum (32) so that a vertical lock rod (34) provided directly above the lock hole (32) can be engaged.
[0017]
The lock rod (34) descends along the guide cylinder (35) and engages with the lock hole (32a) of the drum (32), thereby preventing the rotation of the drum (32) and preventing the traveling wheel ( The lock mechanism (37) for locking the lock 14) is configured.
The lock mechanism (37) is configured to release the lock by raising the lock rod (34) when vibration is applied to the movable shelf (10). This prevents the movable shelf (10) from falling over.
[0018]
As shown in FIG. 3, on the side of the drum (32), a brake (36) as a resistor is attached to the movable shelf (10) via a fixed portion (36c) and a bracket (38). . The brake body (36b) has an arc-shaped contact surface (36a) that can contact the outer peripheral surface of the drum (32), and the contact surface (36a) is in contact with the drum (32) during braking. Rubber that increases the coefficient of friction and adds resistance.
The brake body (36b) can move in the direction of the drum (32) along three upper and lower horizontal pins (42) fixed to the fixing portion (36c).
[0019]
A spring (44) is contracted between each horizontal pin (42) and the fixed portion (36c), and biases the brake body (36b) toward the drum (32).
On the other hand, at the tip of the central horizontal pin (42), a pendulum retainer (46) tapered in the direction of the drum (32) forms a gap with respect to the fixed portion (36c). The upper end (48a) of the pendulum arm (48), which is a vibration detecting means, is always located in the gap between the tapered surface (46a) and the fixed portion (36c). This prevents the pendulum retainer (46) from moving in the direction of the drum (32) due to the urging force of the spring (44).
[0020]
As a result, the brake body (36b) is locked so as not to abut on the drum (32), thereby preventing the brake from being applied in a normal state.
A weight (50) is attached to the lower end of the pendulum (48). Therefore, when a vibration is applied to the movable shelf (10), the arm (48) swings toward the front side perpendicular to the paper surface of FIG. 2 by the action of the weight (50), and the arm (48) engages with the brake body (36b). Is released, and the brake body (36b) can move in the direction of the drum (32).
[0021]
FIG. 4 is an enlarged view schematically showing the relationship between the drum (32) and the brake (36).
[0022]
As shown in FIGS. 3 and 4, a display device (52) indicating that the brake body (36b) is in a contact position with the drum (32) is provided at the lower center side of the arm (48). ing. The display device (52) includes a locking pin (54), an interlocking plate (56), a display bar (58), and the like, and a lower end of the interlocking plate (56) is formed by the locking pin (54). The arm (48) is locked substantially at the center. The interlocking plate (56) can swing with the rotation of the arm (48) when the locking pin (54) abuts, and can rotate on the frame (57) by the fixing pin (56a). Is pivoted to.
[0023]
At the upper end of the interlocking plate (56), a slot (58a) at the end of the display bar (58) is fitted and locked by a split pin (60), and the display bar (58) is (48) and the interlocking plate (56) swing back and forth (arrow A) to move rearward (arrow B) linearly against the urging force of the spring (59). I have.
The tip of the display bar (58) protrudes from the display section (62) of the movable shelf (10) shown in FIG. 1, and indicates that the brake is applied to the traveling wheel (14).
[0024]
Next, the operation of the present embodiment configured as described above will be described.
[0025]
FIG. 5 is a side view of the movable shelf safety device according to the present embodiment. As shown in FIG. 5, when vibration is applied to the movable shelf (10) due to an earthquake or the like, the movement of the movable member (64) in the direction of arrow C by the operation of the lock mechanism (37) causes the lock rod (34) to move. Rises along the cam groove (64a) of the moving member (64), as a result, the engagement with the lock hole (32a) of the drum (32) is released, and the lock of the drum (32) is released. As a result, the drum (32) becomes freely rotatable, and the lock on the traveling wheel (14) is released.
[0026]
On the other hand, due to the vibration applied to the moving shelf (10), simultaneously with the unlocking of the drum (32), the arm (48) of the pendulum swings in the direction of arrow A as shown by the two-dot chain line in FIG. Then, the upper end of the arm (48) moves, and the engagement of the pendulum retainer (46) with the tapered surface (46a) is released.
When the engagement is released, the brake body (36b) starts moving toward the drum (32) by the urging force of the three springs (44), and the contact surface (36a) and the drum (32 ) Comes into contact with the peripheral surface. Therefore, the drum (32) receives frictional resistance due to the contact surface (36a), and the rotation is braked.
[0027]
As a result, the running wheels (14) and (14) are braked via the sprockets (20), (22), (24) and (28), the chains (26) and (30), and the moving shelf (10) Will slowly move on the rail (12) while receiving resistance.
Therefore, it is possible to prevent a person from being caught between the adjacent moving shelves (10) while preventing the moving shelves (10) from overturning, thereby greatly improving the safety in the event of an earthquake. However, this brake only applies braking force to the traveling wheels (14), and does not lock.
[0028]
The drum (32) is linked to the traveling wheels (14) (14) via sprockets (20), (22), (24), (28), chains (26), (30). In addition, a sufficient braking force can be obtained with a braking force smaller than the rotational torque of the traveling wheels (14).
[0029]
Release of the brake is performed as follows.
First, the brake return bar (66) shown in FIG. 5 is inserted through a through hole (not shown) provided in the movable shelf (10), and the opening (66a) at the tip is inserted into the pendulum holder (46). Then, the pendulum retainer (46) moves in the direction opposite to the drum (32), so that the arm (48) engages with the pendulum retainer, and as a result, returns to the initial state and the brake is released.
[0030]
As described above, according to the moving shelf safety device of the present embodiment, the traveling wheels (14) are braked at the same time as the unlocking of the moving shelf (10). It is possible to prevent such a situation, and there is no danger of collision with a person as compared with the case where a conventional strut rod is inserted. Further, since the strut rod does not come into contact with the shelf, there is no danger of damaging the shelf.
In addition, since the moving shelf (10) is braked by a mechanical action, there is an advantage that the operation is reliably performed even in the case of a power failure or the like.
[0031]
In the above-described embodiment, the brake (36) is operated by the inertial force of the weight (50) fixed to the arm (48). However, in the embodiment shown in FIGS. Instead, a swingable lower arm (68) is attached to the lower end of the arm (48), and a weight (70) is further attached to the lower arm (68).
[0032]
That is, the lower arm (68) is swingably attached to the lower end of the arm (48) via the pin (72), and the weight (70) is suspended from the lower arm (68) bent at a right angle. The upper end of the lower arm (68) is a U-shaped portion (68a), and the arm (48) is located inside the U-shaped portion (68a). The inner dimension of the U-shaped portion (68a) is formed to be longer than the dimension L of the arm (48), and a clearance is generated between the U-shaped portion (68a) and the arm (48). ing. Therefore, when the lower arm (68) swings, the inner side surface of the U-shaped portion (68a) comes into contact with the lower end of the arm (48).
[0033]
Further, as shown in FIG. 6, a sliding tape (74) for reducing friction is attached to a lower surface of the fixing portion (36c), and the arm (48) is attached to the fixing portion (36c). The friction force when swinging is reduced, and the arm (48) swings smoothly during the vibration.
[0034]
Therefore, when vibration is applied to the movable shelf (10), first, the lower arm (68) swings due to the inertial force of the weight (70). Then, the U-shaped portion (68a) of the lower arm (68) comes into contact with the arm (48), and a certain impact is applied to the arm (48). The arm (48) swings due to the impact, whereby the upper end of the arm (48) moves and releases the engagement with the tapered surface (46a) of the pendulum retainer (46). As a result, the brake body (36b) moves in the direction of the drum (32), the contact surface (36a) comes into contact with the peripheral surface of the drum (32), the rotation is braked, and the moving shelf (10 ) Is braked. On the other hand, the release of the brake is performed in the same manner as in the above embodiment.
[0035]
As described above, according to the embodiment shown in FIGS. 6 and 7, when applying the brake, the impact by the lower arm (68) and the weight (70) swingably attached to the arm (48) is used. As a result, even when a slight vibration is applied to the movable shelf (10), the brake can be operated reliably, and safety is improved.
[0036]
In the above embodiment, when releasing the brake, the brake return bar (66) is used. However, the brake can be released by pressing the display bar (58). is there.
In the above embodiment, the braking force is obtained by pressing the contact surface (36a) of the brake (36) against the peripheral surface of the drum (32), but instead of the drum (32). A brake disk may be provided, and a braking force may be obtained by pressing the front and back surfaces of the brake disk with pads.
[0037]
【The invention's effect】
According to the present invention, the following effects can be obtained.
(a) According to the first aspect of the present invention, when a vibration is detected by the vibration detecting means, resistance is applied to the rotation of the traveling wheels, so that when the earthquake occurs, the movable shelf moves slowly. Thus, the situation of being caught between the moving shelves can be avoided beforehand, and the safety is greatly improved.
[0038]
(b) According to the second aspect of the present invention, since the lock mechanism for releasing the lock of the traveling wheel is provided when vibration is applied, it is possible to prevent the movable shelf from falling over when an earthquake occurs.
[0039]
(c) According to the third aspect of the present invention, since the vibration detecting means has a mechanical structure, the running wheels can be reliably braked even in the case of a power failure or the like, and the reliability is improved.
[0040]
(d) According to the invention of claim 4, since the brake is activated by applying an impact to the pendulum member of the vibration detecting means, the brake is reliably activated even when a slight vibration is applied to the moving shelf. And safety is improved.
[0041]
(e) According to the fifth aspect of the present invention, since the display member is provided for indicating that the resistor is in the contact position with the rotating body, that is, that the running wheels are braked, The state can be easily recognized.
[Brief description of the drawings]
FIG. 1 is a front view illustrating an entire movable shelf to which a movable shelf safety device according to an embodiment is applied.
FIG. 2 is an enlarged view of a main part of the movable shelf safety device according to the embodiment.
FIG. 3 is a schematic perspective view showing a relationship between a drum as a rotating body and a brake as a resistor.
FIG. 4 is an enlarged perspective view showing a relationship between a drum and a brake.
FIG. 5 is a side view showing a main part of the safety device for a movable shelf according to the embodiment.
FIG. 6 is a perspective view illustrating a main part of a safety device according to another embodiment.
FIG. 7 is an enlarged view of a main part corresponding to FIG. 2 of the embodiment of FIG. 6;
[Explanation of symbols]
(10) Moving shelf
(12) Rail
(14) Running wheels
(16) Power transmission mechanism
(18) Handle
(19) Rotary axis
(20) Drive sprocket
(22) Large sprocket
(24) Small sprocket
(26) Chain
(28) Follower sprocket
(30) Chain
(32) Drum
(32a) Lock hole
(34) Lock rod
(35) Guide tube
(36) Brake
(36a) Contact surface
(36b) Brake body
(36c) Fixed part
(37) Lock mechanism
(38) Bracket
(42) Horizontal pin
(44) Spring
(46) Pendulum hold
(46a) Tapered surface
(48) Arm
(50) Weight
(52) Display device
(54) Lock pin
(56) Interlocking plate
(57) Frame
(58) Display bar
(58a) Slot
(59) Spring
(60) Split pin
(62) Display
(64) Moving member
(64a) Cam groove
(66) Brake return bar
(66a) Opening
(68) Lower arm
(68a) U-shaped part
(70) Weight
(72) Pin
(74) Sliding tape

Claims (4)

A traveling wheel, and a transmission mechanism for transmitting a driving force to the traveling wheel,
A rotating body that rotates following the rotation of the traveling wheel is provided in the transmission mechanism, and vibration detecting means for detecting vibration applied to the moving shelf is provided.When the vibration is detected by the vibration detecting means, The transmission mechanism is provided with a resistor that moves to a contact position where it contacts the rotating body and applies a brake to the rotation of the traveling wheel, and further, the rotation of the traveling wheel is lockable, and vibration is applied. In this case, a lock mechanism for unlocking the traveling wheel is provided, and furthermore, a means for releasing the lock state of the lock mechanism when vibration is applied, and when vibration is detected by the vibration detection means, The means for moving the resistor to the contact position is constituted by different mechanical means from each other . The vibration detecting means normally holds the resistor at a position separated from the rotating body against the elastic force of the elastic member, and at the time of detecting the vibration, the elastic body of the elastic member at a contact position with the rotating body. The safety device according to claim 1 , further comprising a pendulum member that moves the resistor by force. The pendulum member of the vibration detecting means is composed of a first pendulum member and a second pendulum member. 3. The safety device according to claim 2 , wherein a weight is attached to a lower end of the pendulum member. The safety device according to any one of claims 1 to 3 , further comprising a display member that indicates that the resistor is in a contact position with the rotating body.

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