JP3834395B2 - Automatic unlocking device for moving shelf - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic unlocking device for a moving shelf, and more particularly to an automatic unlocking device that automatically releases a stop lock state of a moving shelf in order to prevent the moving shelf from falling over when an earthquake occurs.
[0002]
[Prior art]
In general, the moving shelf is provided with a lock mechanism that prevents the traveling wheels from rotating so that the moving shelf does not move unnecessarily.
However, when locked by the locking mechanism, the movable shelf cannot escape and move in the direction of the earthquake when the earthquake occurs, and may fall down.
For this reason, the mobile shelf may be provided with an automatic lock release device that automatically releases the lock mechanism to prevent the mobile shelf from falling when an earthquake occurs.
[0003]
This automatic lock release device is disclosed in the following publications, for example.
The automatic lock release device described in Japanese Utility Model Publication No. 57-7324 (first publication) tilts a lock member that locks a traveling wheel or a speed reduction transmission mechanism by an external operation so that it can be easily moved in the unlocking direction. At the time of occurrence, with the help of the inclination, the lock member moves in the unlocking direction to automatically unlock the lock mechanism.
[0004]
The lock release device described in Japanese Utility Model Publication No. 4-27395 (second publication) is configured such that when a pendulum-like actuating member having a weight at the lower end swings back and forth due to an earthquake, the lock member is locked. The locking mechanism is automatically released from the braking wheel.
[0005]
The automatic lock release devices described in JP-A-8-256845, JP-A-8-275929, and JP-A-8-275830 (third to fifth publications) can swing left and right with a weight at the lower end. When the pendulum-like actuating member swings left and right due to an earthquake, the lock shaft biased in one direction is moved in the biasing direction, and the lock member engaged between the sprocket teeth is The engagement is disengaged from between the teeth, and the lock state of the lock mechanism is automatically released.
[0006]
[Problems to be solved by the invention]
Each of the automatic lock release devices described in the above publications has the following problems.
Unlocking device described in the first publication:
Since the lock member is inclined so as to easily move in the release direction, there is a risk of malfunction that releases the lock state of the lock mechanism if vibration is received by the collision of the movable shelves.
[0007]
Unlocking device described in the second publication:
Even if the actuating member swings backward, it comes into contact with the frame of the moving shelf and the amount of swinging is insufficient, so the unlocking operation becomes uncertain, and the locked state of the locking mechanism cannot be reliably released. There is a case.
[0008]
The unlocking device described in the third to fifth publications:
Since the actuating member vibrates left and right, when the left and right vibrations are caused by the collision of the movable shelves, there is a risk of malfunction that unlocks the lock mechanism.
[0009]
In view of the above problems, the present invention does not malfunction such as releasing the locked state of the lock mechanism even when it receives vibration in the left-right direction due to the collision between the moving shelves, and receives vibration in the front-rear direction when an earthquake occurs. It is an object of the present invention to provide an automatic unlocking device with few malfunctions in which the lock state of the lock mechanism is released to prevent the movable shelf from falling.
[0010]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) A lock member that engages with a power transmission mechanism that transmits the rotational force of the handle of the movable shelf to the traveling wheel to prevent the rotation of the traveling wheel; and the lock member with respect to the power transmission mechanism by an external operation The lock operation rod of the lock mechanism including a lock operation rod that is selectively moved to the engagement position and the non-engagement position is connected to the lock operation rod when vibration is applied to the movable shelf, and The lock member is moved to a non-engagement position by operating with a weighted drop traction whose movement in the direction is restricted, and the engagement of the lock member with the power transmission mechanism is released.
[0011]
(2) In the above item (1), the weight and the lock operating rod are connected with a rope.
[0012]
(3) In the above item (1) or (2), the weight is held by a support frame having a pair of left and right side walls to guide the fall.
[0013]
(4) In any one of the above items (1) to (3), a cable that can be pulled up from the dropping position to a height before dropping is connected to the weight by external traction.
[0014]
(5) In any one of the above items (1) to (4), the weight is spherical.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the automatic unlocking device (1) is in a locked state of the lock mechanism (2), that is, the lock mechanism (2) is engaged with the power transmission mechanism (4) of the movable shelf (3). It is a device that allows the movable shelf (3) to move by canceling the state in which the rotation of the traveling wheel (5) is blocked when an earthquake occurs.
[0016]
Next, the movable shelf (3), the power transmission mechanism (4), and the lock mechanism (2) related to the automatic lock release device (1) will be described.
As shown in FIG. 2, a plurality of movable shelves (3) are arranged so as to be movable on the same rail (6) in order to effectively use the shelf installation area. You can move in and out of the area.
[0017]
As shown in FIG. 2, the power transmission mechanism (4) is configured so that the rotational force of the handle (8) provided on the front surface (7) of the movable shelf (3) is applied to the traveling wheels ( It is a mechanism for transmitting to 5).
That is, the rotational force of the handle (8) is applied to the drive sprocket (10) via the drive sprocket (10) provided at the rear end of the rotary shaft (9) provided with the handle (8) and the drive chain (11). The intermediate sprocket (12) connected, the driven sprocket (13) coaxial with the intermediate sprocket (12), and the wheel sprocket (15) connected to the driven sprocket (13) via the driven chain (14) Is transmitted to a traveling wheel (5) coaxial with the wheel sprocket (15).
[0018]
The lock mechanism (2) is a mechanism that engages with the power transmission mechanism (4) to prevent the traveling wheels (5) from rotating.
Next, the operation of engaging the lock mechanism (2) with the power transmission mechanism (4) will be described.
1, 3, and 4, a plate-like shape accommodated in a lock operation case accommodation case (17) provided on the frame (16) of the movable shelf (3) in the front-rear direction and above the handle (8). The lock operation rod (18) is pulled forward from the state shown in FIG. 1 to the state shown in FIG.
The lock operation rod (18) is formed with an inclined hole (19) whose rear end is lower than the front end, and the lock operation rod housing case (17) is formed with a vertically long guide long hole (20). As shown in FIG. 4, the connecting shaft (21) passing through the inclined hole (19) and the guide elongated hole (20) descends as the lock operating rod (18) is pulled out.
[0019]
Both ends of the connecting shaft (21) protrude from the left and right sides of the lock operating rod housing case (17), and a pair of front and rear locking members (22) and (22) are suspended at both ends of the connecting shaft (21). A character-shaped connecting link (23) is suspended. Therefore, as the connecting shaft (21) is lowered, the connecting link (23) and the lock member (22) are also lowered, and the lower end (22a) of the lock member (22) is a drum (10) integrated with the drive sprocket (10). It engages with lock holes (24a) (24a) formed in 24). The lock member (22) is guided and lowered by the guide cylinders (25) and (25) provided on the frame (16).
Thus, the lock mechanism (2) is engaged with the power transmission mechanism (4).
[0020]
The lock holes (24a) are arranged in two rows around the circumference of the drum (24), are long holes in the circumferential direction, and are arranged in a staggered manner with the positions shifted from each other. ) Is surely engaged.
Further, the lock member (22) is suspended and suspended from the connecting link (23) by a split pin (26) penetrating the upper portion of the lock member (22). Therefore, if the lock member (22) not engaged with the lock hole (24a) is in contact with the drum (24), the coil spring (27) is compressed by the connection link (23), and the connection link Allow descent of (23).
[0021]
The lock mechanism (2) is disengaged from the power transmission mechanism (4) by pressing the lock operation rod (18) rearward and pushing it into the lock operation rod storage case (17).
That is, when the lock operating rod (18) is pushed from the state shown in FIG. 4 to the state shown in FIG. 1, the connecting shaft (21) is guided along the inclined hole (19) and into the guide slot (20). The lock member (22) is pulled up via the connecting link (23), and the tip (22a) of the lock member (22) is removed from the lock hole (24a) of the drum (24).
Thereby, the engaged state with the power transmission mechanism (4) is released, and the traveling wheel (5) can freely rotate.
[0022]
Positioning of the lock operation rod (18) between the pulled-out state and the pushed-in state is performed by positioning means (28) provided between the lock operation rod (18) and the lock operation rod storage case (17).
The positioning means (28) includes a coil spring (30) and a positioning ball (31) held in a ball holding hole (29) provided in the lock operation rod (18), and front and rear of the lock operation rod storage case (17). And ball engagement holes (32) drilled at two locations in the direction. The distance between the two ball engaging holes (32) is the same as the pulling stroke of the lock operating rod (18).
The bolts (33) and nuts (34) in FIGS. 1, 3, and 4 are bolts and nuts for assembling the frame (16).
[0023]
Finally, the automatic lock release device (1) will be described.
First, the configuration will be described.
The automatic lock release device (1) includes a weight (36) connected to the lock operating rod (18) by a dropping rope (35). The weight (36) is also connected to the reset rod (38) on the frame (16) by a lifting rope (37).
The reset rod (38) is provided on the frame (16) so as to be movable back and forth. The coil springs (39) and (40) loosely fitted back and forth with respect to the frame (16) are moved to the position indicated by the solid line in FIG. Is retained.
The weight (36) is formed in a spherical shape so as to be easily dropped, and the support frame (41) having the left and right side walls (41a) prevents it from rolling or shaking in the left-right direction both before and after dropping. Is held in.
[0024]
Next, the operation will be described.
Usually, the weight (36) is pulled up to the upper stage (41b) of the support frame (41).
When an earthquake occurs, if weight is applied to the moving shelf (3) in the front-rear direction, the weight (36) falls backward.
Since the weight (36) is restricted in the lateral direction by the left and right side walls (41a) of the support frame (41), the weight (36) will fall down even if the movable shelf (3) is subjected to lateral vibration. There is hardly anything.
[0025]
When the weight (36) rolls down, if the lock member (22) of the lock mechanism (2) is engaged with the lock hole (24a) as shown in FIG. As shown in FIG. 1, the lock operating rod (18) is pulled by the dropping rope (35) when the weight (36) is dropped, so that the lock operating rod accommodating case (17) Be drawn into. Then, the lock operating rod (18) pulls up the lock member (22), extracts the lower end (22a) of the lock member (22) from the lock hole (24a), and releases the lock state of the lock mechanism (2).
As a result, the movable shelf (3) can be moved in the left-right direction, and is less likely to fall over due to an earthquake.
The fallen weight (36) is restricted from shaking in the left-right direction by the left and right side walls (41a) of the support frame (41), and does not interfere with other parts and cause damage.
[0026]
When the weight (36) falls, if the reset rod (38) pulled into the frame (16) through the lifting rope (37) is pulled to the position indicated by the phantom line on the right in FIG. (36) is pulled up by the pulling rope (37) and placed in the upper stage (41b) of the support frame (41).
When the reset hook (38) is released, the reset hook (38) is returned to the position of the solid line by the spring (40), and both the cords (35) (37) are loosened.
As a result, the automatic unlocking device (1) is reset.
[0027]
【The invention's effect】
According to the present invention, since the weight for releasing the lock state of the lock mechanism is restricted from falling in the left-right direction, the other movable shelf collides with the movable shelf in the locked state, and the vibration in the left-right direction is applied. Even if this happens, it is possible to prevent the locked movable shelf from being erroneously unlocked.
[0028]
When the weight and the lock operating rod are connected with the rope as in the second aspect, the lock operating rod can be quickly actuated as the weight is dropped.
[0029]
If the weight is held and supported by the support frame having a pair of left and right side walls as in claim 3, the weight is not affected even if another moving shelf collides with the locked moving shelf and vibrations in the left and right direction are applied. Therefore, the automatic lock release device can be prevented from malfunctioning with almost no falling.
Moreover, the fallen weight does not shake in the left-right direction, and can prevent other parts from being damaged.
[0030]
When a cable that can be pulled up from the dropping position to the height before dropping is connected to the weight by external traction as in claim 4, the automatic lock release device can be easily reset by an external operation. .
[0031]
If the weight is made spherical as in the fifth aspect, the weight can easily roll and fall, the response time of the automatic lock release device can be shortened, and the moving shelf can be prevented from falling over quickly.
[Brief description of the drawings]
FIG. 1 is a side view showing a partial cross section of an automatic unlocking device according to an embodiment of the present invention.
FIG. 2 is a front view of a movable shelf.
FIG. 3 is a view of the automatic unlocking device of FIG. 1 as viewed from the left side;
FIG. 4 is a side view of the automatic unlocking device in an inoperative state.
[Explanation of symbols]
(1) Automatic lock release device
(2) Lock mechanism
(3) Moving shelf
(4) Power transmission mechanism
(5) Traveling wheels
(6) Rail
(7) Front
(8) Handle
(9) Rotating shaft
(10) Drive sprocket
(11) Drive chain
(12) Intermediate sprocket
(13) Driven sprocket
(14) Driven chain
(15) Wheel sprocket
(16) Frame
(17) Locking operation storage case
(18) Lock operation
(19) Inclined hole
(20) Guide slot
(21) Connecting shaft
(22) Lock member
(22a) Lower end
(23) Link
(24) Drum
(24a) Lock hole
(25) Guide tube
(26) Split pin
(27) Coil spring
(28) Positioning means
(29) Hole holding hole
(30) Coil spring
(31) Positioning ball
(32) Ball engagement hole
(33) Bolt
(34) Nut
(35) Falling rope
(36) Weight
(37) Pulling rope
(38) Reset 杆
(39) Coil spring
(40) Coil spring
(41) Support rod
(41a) Side wall
(41b) Upper row

Claims (5)

A lock member that engages with a power transmission mechanism that transmits the rotational force of the handle of the movable shelf to the traveling wheel to prevent the traveling wheel from rotating, and an engagement position of the lock member with respect to the power transmission mechanism by an external operation And the lock operation rod of the lock mechanism that selectively moves to the non-engagement position, when vibration is applied to the movable shelf, the lock operation rod is connected to the lock operation rod and is moved in the left-right direction. The lock member is moved to a non-engagement position by operating by a drop traction of a weight whose movement is restricted, and the engagement of the lock member with the power transmission mechanism is released. Automatic unlocking device for moving shelves. The automatic unlocking device for a movable shelf according to claim 1, wherein the weight and the lock operating rod are connected by a rope. The automatic unlocking device for a movable shelf according to claim 1, wherein the weight is held by a support frame having a pair of left and right side walls to guide the fall. The automatic unlocking device for a movable shelf according to any one of claims 1 to 3, wherein a cable that can be pulled up to a height before dropping from a dropping position is connected to the weight by external traction. The automatic unlocking device for a movable shelf according to any one of claims 1 to 4, wherein the weight is spherical.

Images