JP3067655B2 - Mobile shelf seismic isolation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation mechanism for negating the operation of a lock mechanism provided on a movable shelf which can be moved by rotating a handle or a motor provided on the shelf.

[0002]

2. Description of the Related Art In a manual or electric moving shelf,
Since each shelf can be freely moved by rotating a handle or a motor, a lock mechanism is provided from the viewpoint of safety. This is because, for example, when a worker is present between shelves for putting in and out of stored articles, it is dangerous to move the shelf or another shelf by an operation of another worker. This lock mechanism is set on the lock side for safety and the like even when the shelf is not used at night or the like.

Various lock mechanisms for this purpose have been conventionally proposed and used in practice, but in principle, the rotation of a handle or a motor is transmitted to the traveling wheels of a shelf. For example, a rotating member that forms a power transmission mechanism, such as a sprocket of a handle shaft, an intermediate sprocket, a wheel rod sprocket, or the like, is provided with a lock rod, or a rotating member that is separately provided coaxially with each of the above sprockets. In most cases, a lock rod is inserted into a lock hole or the like.
Some electric motors use a motor brake or a reduction gear train of a geared motor as a lock mechanism.

The above-mentioned locking mechanism is useful for achieving the intended purpose in that the locking mechanism can prevent the movement of the shelf due to an erroneous operation when a person is present between the shelves, regardless of the locking method. However, since the locked state cannot be released without manual operation, there are the following problems.

That is, when the movable shelf is in a locked state,
For example, if an earthquake occurs and the vibrations act in the direction of movement of each shelf, the shelves are locked immovably and the stored items on the shelf are likely to slide off the shelf due to their inertia. is there.

In view of such a point, the present inventors have proposed that when a force caused by a vibration caused by an earthquake or the like such that the stored items on the shelf fall down on the movable shelf in the locked state, the locked state is automatically set. We proposed a mechanism that can create the same state as when it is released.

In the mechanism proposed above, the rotational driving force is transmitted to the running wheels via a transmission mechanism such as a sprocket, a pulley, a chain, a belt, or the like, and is movable, and the transmission mechanism is locked. In a movable shelf that is locked by a mechanism so that traveling is disabled, a weight that slides by receiving vibration along the traveling direction is provided on the movable shelf, and the sliding motion of the weight is performed by the traveling wheel or The key member provided on the rotating shaft of the transmission mechanism is converted into a direction in which the key member is removed, whereby the key member of the rotating shaft is removed from the key groove and attached to the rotating shaft via the key member. The rotating body is set to a free rotatable state, and a mechanism equivalent to automatically unlocking the locked state can be realized by this mechanism.
It is excellent.

The above mechanism is excellent in its function. However, since the weight swinging by the vibration and the member for unlocking are mechanically directly connected to each other, one time of the weight is used. It has been found that if the force of the sliding operation is weak, the state may not be equivalent to the unlocked state, and that there is still room for improvement.

[0009]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and, in addition, when the movable shelves are in a locked state, rationally uses a force caused by an earthquake or the like applied to the moving direction of each shelf. Another object of the present invention is to provide a seismic isolation mechanism capable of moving a shelf in a locked state without fail once the weight operates once, that is, a state equivalent to unlocking. Things.

[0010]

The structure of the seismic isolation mechanism according to the present invention, which has been made to solve the above-mentioned problems, is described in which the rotational driving force is transmitted through a transmission mechanism using a sprocket, a pulley, a chain, a belt, or the like. Or a movable rack in which the transmission mechanism is movable by being transmitted to running wheels and the transmission mechanism is locked by a lock mechanism so that the running cannot be performed, or the rotational force of the motor is driven by a sprocket, a chain, or a gear train. And transmitted to the traveling wheels by a transmission mechanism such as
In a movable shelf that is held unmovable by a brake or a reduction gear of a table, the movable shelf is provided with a weight that slides when subjected to vibration along the traveling direction of the shelf,
A key provided on the shaft of the running wheel or the rotating shaft of the transmission mechanism.
A key removal member which is urged by a spring or the like to apply a force acting in the removal direction of the key member to remove the member, and a stopper member which holds the position of the key removal member displaced to the operation standby side. When the weight slides due to vibration, the stopper member is removed from the key removal member, and the key removal member is moved from the standby position by the urging force of a spring or the like to move the key of the shaft. The member is removed from the key groove, and the running wheel is made free rotatable.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the seismic isolation mechanism of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a main part of a handle type moving shelf to which an example of the mechanism of the present invention is applied, FIG. 2 is an enlarged perspective view of a main part of an example of the mechanism of the present invention applied to the moving shelf of FIG. 1, and FIG. 2 is a perspective view of the main part of the mechanism of the present invention as viewed from the back side, FIG. 4 is a plan view of the main part of another example of the mechanism of the present invention, and FIG. 5 is a left side view of the main part of the mechanism of the present invention of FIG. is there.

In FIG. 1, reference numeral 1 denotes a lower frame of a movable shelf.
Reference numerals 2, 3 denote traveling wheels on one side of a shelf provided on the frame 1. In this case, the transmission wheel 2 is provided with a transmission mechanism described later by rotation of a handle 4 provided on a side wall (not shown) of the shelf. The shelf is formed so that it can travel freely forward and backward along the rail R.

That is, the rotation of the handle 4 is transmitted from the drive sprocket 6 integral with the shaft 5 to the relay sprocket 7 provided at the side end of the frame 1 via the chain C1, and this is transmitted to the relay shaft. 8 is transmitted from an output sprocket 9 provided at the rear end to an input sprocket 10 coaxially with the traveling wheel 2 via a chain C2, and the above members 6 to 10, C1, C2 Form the transmission mechanism in this embodiment from the steering wheel 4 to the running wheels 2. In addition,
CT is a chain tensioner.

In the present invention, the construction of the transmission mechanism of the moving shelf is not limited to the illustrated one, but a mechanism using a pulley instead of a sprocket and a belt instead of a chain, or a worm, Of course, the present invention can be applied to a mechanism using a worm wheel and a shaft, a bevel gear and a shaft, and a gear train. A so-called electrically driven moving shelf in which rotational force such as that described above is transmitted to the traveling wheels 2 or 3 via any of the transmission mechanisms described above is also applicable.

In the above-described transmission mechanism, the space between the rotating member such as the handle 4 and the rotating shaft 5 to which the rotating member is attached is provided.
In order to ensure that both members rotate together, a key groove is provided on the fitting surface between the rotating member and the rotating shaft, and the key member is fitted into this groove to integrate the two members. . According to the present invention, the key member connecting the rotating member and the rotating shaft is pulled out by using the vibration applied to the moving direction of the movable shelf due to an earthquake or the like, and the rotating member and the rotating shaft are relatively free from each other. -By making it rotatable, it is possible to obtain a seismic isolation effect by making a state equivalent to releasing the locked state of the movable shelf that disables rotation of the traveling wheel 2 and making it able to run. It is assumed that. Hereinafter, this point will be described with reference to FIGS.

In FIGS. 2 and 3, reference numeral 11 denotes a disc-shaped key attachment / detachment tool loosely inserted into the relay shaft 8, and a key 12 for connecting the shaft 8 and the sprocket 9 is integrally formed on a side surface. It is provided so as to be able to slide forward and backward along a key groove 13 formed on the shaft 8 integrally with the key 12 on the shaft 8. Here, the key groove 13 is formed longer than usual, for example, about twice as long as the key 12 retreats together with the detachable metal fitting 11. 14 is the key on the relay shaft 8
A key-pressing spring is provided on the rear surface of the attachment / detachment metal 11 and constantly urges the metal attachment 11 in the advance direction. With this spring force, the key 12 keeps the connection between the sprocket 9 and the relay shaft 8. Is formed. 14a is a C-clip washer for fixing the rear end of the spring 14 with the shaft 8.

In FIG. 2 and FIG. 3, reference numeral 15 denotes a block-shaped weight which is slidably disposed on the frame 1 in the direction of movement of the shelf. It is mounted on a slide guide 15b provided on a support frame 15a provided on the lower frame 1, and is provided so as to be able to move forward and backward only in the moving direction of the shelf.

On the other hand, the support frame 15a slides along the support frame 15a against the front surface of the key attachment / detachment metal 11 loosely inserted into the relay shaft 8 so as to come into contact with the support frame 15a. An operating plate 16 serving as a key removal member formed with an inclined cam surface 16a acting to retreat (leftward in FIG. 2) the shaft 11 on the shaft 8 draws the operating plate 16 toward the metal fitting 11. Direction, and a guide pin 18 for guiding the sliding operation of the operating plate 16, and the operating plate 16 is retracted against the repulsive force of the spring 17. (Right side in FIG. 2), that is, a stopper 19 is provided to be held at the standby position. 16b is the stopper 1
A notch formed in the operation plate 16 for locking the lock 9, and a guide groove 16 c of the operation plate 16 for loosely guiding the guide pin 18.
Further, in the present invention, it is optional to use a gas spring or another form of spring in place of the tension spring 17.

In FIG. 2, reference numeral 20 denotes a mounting bracket for the spring 17 and the stopper 19 disposed on the support frame 15a along the operating plate 16, and 21 denotes a spring force adjusting bolt for the spring 17 provided on the bracket. The spring 17 is stretched between the bolt 21 and the operating plate 16 and acts as a force for pulling the operating plate 16 toward the key attachment / detachment 11 side. Reference numeral 22 denotes a side surface of the weight 15, which is a wedge-shaped stopper release cam provided on a side corresponding to the stopper 19, and reference numeral 23 denotes a slide limiter provided in front of the weight 15.

An example of the seismic isolation mechanism of the present invention is constituted by the above-mentioned respective constituent members or constituent parts 11 to 23, and the operation thereof will be described below.

The movable shelf provided with the above seismic isolation mechanism is provided by engaging a locking rod (not shown) between the teeth of the drive sprocket 6 of the handle 4 or the intermediate sprocket 7 in FIG. A lock mechanism is provided for holding the rotation of the member improperly, and when not in use, the lock mechanism cannot move each shelf. It has been mentioned earlier that if a shelf in such a state is mainly subjected to vibrations caused by an earthquake in the moving direction of the shelf, the stored items on the shelf may fly out or slide down due to inertia because the shelf is locked. As expected.

However, in the shelf provided with the seismic isolation mechanism of the present invention, when the above-mentioned vibration is received in the moving direction of the shelf, the weight 15 mounted on the slide guide 15b is weakly pulled by the adjusting spring 15c. It easily overcomes the force and slides forward (to the left in FIG. 2) due to its inertia (sliding backward is impossible due to the end limiter (not shown)). When the weight 15 slides forward, the stopper release cam 22 provided integrally therewith lifts the lower part of the stopper 19,
Remove the stopper 19 from the notch 16b of the operation plate 16. Working plate 1
When the stopper 19 comes off the notch 16b, the spring 17
Of the guide groove 18
c is guided and advances forward from the standby position to the left in FIG.
The operating plate 16 which advances by the spring force has its inclined cam surface 16a.
Pushes the key attachment / detachment 11 on the relay shaft 8 in a direction away from the output sprocket 9 (this is called retraction). The key attachment / detachment fitting 11 is moved by the action of the cam 16a.
When the key 11 is retracted against the force of the power sprocket 9, the key 12 provided integrally with the metal fitting 11 is used as a key between the output sprocket 9 and the relay shaft 8.
Since the output sprocket 9 is removed from the grooves 13 and 9a,
Is free with respect to the shaft 8.

Therefore, the free sprocket 9 is connected to the free sprocket 9 via the chain C2 and the sprocket 10 as shown in FIG.
Of the running wheel 2 is free, and the rack provided with the free running wheel 2 is a running wheel that rotates back and forth on the rail R without opposing the vibration caused by the advance of the weight 15. Due to the actions of a few, the vibration is absorbed. When the weight 15 slides due to vibration, the stopper releasing cam 22 removes the stopper 19 from the notch 16b of the operating plate 16 at the time of the initial sliding, but the stopper 19 that has come off from the notch 16b moves the operating plate Since it is located below 16, the weight 15 that slides back and forth will not be returned to the original position. Here, the pushing force of the operation plate 16 by the spring 17 and the pushing force of the key attaching / detaching member 11 by the spring 14 are naturally larger than the pushing force by the spring 17.

The operating plate 16 and the weight 15 after performing the above operation
Resets as follows. First, the operating plate 16
The action force of the spring 17 is weakened by loosening the nut of the spring force adjustment bolt 21 supporting the spring 17 or the action of the spring 17 is released, and the operation plate 16 is returned to the right in FIG. 15 is also moved to the right of the figure. In this state, the stopper 19 is raised to lock the notch 16b of the operating plate 16, and the spring force adjusting bolt 2
By resetting 1, the seismic isolation mechanism of the present invention is reset. The key 12 of the key attachment / detachment 11 again enters the key grooves 13 and 9a by the action of the spring 14 by the above-described return operation of the operation plate 16, and integrally connects the shaft 8 and the sprocket 9. If a phase shift occurs between the key groove 9a of the sprocket 9 and the key groove 13 of the shaft 8 due to the free rotation of the sprocket 9, the shaft 8 may be rotated slightly or the shelf may be moved slightly to change the phase. Align.

In the above example, the key 12 connecting the relay shaft 8 and the output sprocket 9 is removed and the sprocket 9 is removed.
Is a seismic isolation mechanism that allows the running wheels 2 to rotate and thereby absorbs the force applied to the shelves by moving the shelves. The purpose of the present invention is to make the freewheeling possible, so that the member to be freewheeled is any one of the members provided between the rotating shaft and the rotating member in the transmission mechanism for transmitting the rotational force to the traveling wheels 2. A key member is sufficient. In this sense, the rotating shaft and the rotating member which are the object of the present invention are freewheels with respect to the shaft mounted when the key is removed, such as the sprocket 10 and its shaft 2a and the relay sprocket 7 and its shaft 8. Any rotating body may be used.

Further, in the above example, when the weight 15 is slid by its inertia when subjected to vibration or the like, the key 17 is caused to retreat on the shaft 8 so that the repulsive force of the spring 17 is accumulated. The stopper 19 of the operation plate 16, which is prevented from moving forward by the stopper 19, is released by the sliding movement of the weight 15, but this function is replaced by a mechanism schematically shown in FIGS. 4 and 5. You may. 4 and 5
In the figure, reference numeral 24 designates a substantially L-shaped operating link which is arranged on the mounting frame 15a by a pin 24b with the tip 24a abutting on the front surface of the key attachment / detachment 11, and 25 designates the link 24 In order to rotate the link 24 in the removing direction, a spring 26 is stretched around the link 24. A guide 15b is provided at the rear end side of the link 24 to prevent the link 24 from rotating by the action of the spring 25.
The stopper cam 27 disposed on the top is a push rod for releasing the stopper cam 26 from the operation link 24 at the distal end side of the weight 15, and in this mechanism, the weight 15 receives a vibration or the like and the guide 15b is moved by inertia. When the rod slides upward in the direction of the solid arrow, the stopper cam 26 is disengaged from the operating link 24 by the advancement of the rod 27, whereby the link 24 rotates counterclockwise by the force of the spring 25, and the tip 24a of the stopper 24 is attached and detached. The metal fitting 11 is moved backward (to the left in FIG. 4).

In FIG. 4, the same reference numerals as those in FIGS. 1 to 3 denote the same members, but reference numeral 21 denotes a side surface of the weight 15 and the frame 15.
It is an operation sensitivity adjustment unit provided between the opposing surface of a and the seismic isolation mechanism of the present invention. That is, the spherical concave portion 28 is formed on the left side surface of the weight 15.
On the side of the frame 15a facing the concave portion 28, a screw rod 30 provided with a ball 29 at the tip is provided via a spring 31 acting on the advance side of the ball 29. A nut member 32 for adjusting the repulsive force of the weight 31 is interposed, and the ball 29 is fitted into the concave portion 28. By rotating the wing nut member 32, the repulsive force of the spring 31 with respect to the inertia is adjusted.

The above embodiment is directed to a movable shelf using the rotational force of the manual handle as a drive source as illustrated in FIG. 1, but the mechanism of the present invention relates to a movable shelf using a motor as a drive source. Of course, it can also be applied. The mechanism of the present invention can be applied to a sprocket or a chain in the transmission mechanism of the above-described example even if it is a pulley or a belt.

[0029]

As described above, the present invention is as described above. In a movable shelf in a locked state where a lock mechanism is set and travel is impossible, when a vibration is applied in the moving direction of the shelf, the weight slides due to its inertia. While providing this weight,
In order to remove the key member connecting the rotating body and its shaft in the torque transmitting mechanism from the key groove, the key is configured to store the removing force by a spring or the like in the removing direction of the key member. A withdrawal member, and a stopper member for holding the withdrawal member storing the withdrawal force in an operation standby position, wherein the sliding weight removes the stopper member from the key withdrawal member so that the withdrawal member is removed. Since the key member is removed from the key groove of the rotating shaft and the running wheel is in a free rotation state, even if a reciprocating force in the moving direction is applied to the moving shelf due to an earthquake, the force is absorbed by the longitudinal movement of the shelf. Therefore, it is extremely useful as a seismic isolation mechanism for mobile shelves.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a handle-type movable shelf to which an example of the mechanism of the present invention is applied.

FIG. 2 is an enlarged perspective view of a main part of an example of the mechanism of the present invention applied to the moving shelf of FIG. 1;

FIG. 3 is a perspective view of a main part of the mechanism of the present invention shown in FIG. 2 as viewed from the back surface side.

FIG. 4 is a plan view of a main part of another example of the mechanism of the present invention.

FIG. 5 is a left side view of a main part of the mechanism of the present invention in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower frame 2, 3 Running wheel 4 Handle 5 Shaft 6 Drive sprocket 7 Relay sprocket 8 Relay shaft 9 Output sprocket 10 Input sprocket 11 Key-detachment bracket 12 Key- 13 Key-groove 14 Key-press spring 15 Block-shaped Weight 15a Support frame 15b Slide guide 16 Operating plate 16a Inclined cam surface 16b Notch 16c Guide groove 17 Tension spring 18 Guide pin 19 Stopper 20 Mounting bracket 21 Spring adjustment bolt 22 Stopper release cam C1, C2 chain

Claims (2)

(57) [Claims] An electric or manual moving shelf includes a weight that slides in a traveling direction of the shelf, and a key member provided on a shaft of a traveling wheel of the moving shelf or a rotating shaft in a transmission mechanism of traveling force. A key removal member for forming a removal force by a force of a spring or the like for removal, and a stopper member for holding the key removal member at the standby position and releasing the holding position by sliding the weight are provided. When the weight receives the vibration and slides, the stopper member is removed from the key removal member, and the key removal member moves from the standby position by the urging force of a spring or the like to lock the key member of the shaft. -A seismic isolation mechanism for a moving shelf, which is removed from a groove to make the running wheel free to rotate. 2. A rotary driving force is transmitted to a traveling wheel via a transmission mechanism such as a sprocket, a pulley, a chain, a belt, or the like, and is movable, and the transmission mechanism is disabled by a lock mechanism. The movable rack or motor, which is locked, is transmitted to a traveling wheel by a transmission mechanism such as a sprocket, a chain, or a gear train, and can be moved. A movable shelf provided so as to be unable to travel by a key or a reduction gear, the movable shelf being provided with a weight that slides when subjected to vibrations along the traveling direction of the shelf, and a shaft or transmission of the traveling wheel; A key removal member urged by a spring or the like to apply a force acting in a direction in which the key member is removed in order to remove a key member provided on a rotation shaft of the mechanism; Switch to hold the position of the extraction member When the weight is slid by receiving the vibration, the stopper member is removed from the key removing member, and the key removing member is moved from a standby position by a biasing force of a spring or the like to move the shaft from the standby position. A key member is removed from the key groove so that the running wheel can be freely rotated.