JPS637765B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to the use of any adjacent unit shelf in a group of unit shelves that are arranged such that their adjacent frontages collide with each other when converging and are movable in the depth direction. In a movable shelf configured to form a space corresponding to a passage between unit shelves, when an earthquake occurs, the space corresponding to the passage is automatically closed and converged, and the movable shelf is moved in this converged state. This invention relates to an earthquake-resistant mobile shelf that can be fixed.

PRIOR ART AND PROBLEMS TO BE SOLVED BY THE INVENTION In the above-mentioned movable shelves, a predetermined unit shelf is moved to expose a shelf frontage serving as a loading/unloading surface of the required unit shelf, and a required item is transported from the shelf opening. However, when an earthquake occurs, the horizontal excitation force causes the movable unit shelf to reciprocate along the direction of movement, and the shelf of the movable shelf facing the space corresponding to the passageway Items in the booth may fall from the shelf opening into the space, damaging the items and the floor.

Means and Effects for Solving the Problems The present invention relates to an improvement of an electric movable shelf that overcomes these difficulties, and includes a fixed unit shelf that is fixed upright on the floor and a unit that can be moved in the depth direction on the floor using wheels. Among movable unit shelves and fixed shelves that consist of a plurality of supported movable unit shelves, whose respective adjacent frontages collide with each other when condensed, and which are movable in the depth direction, a passageway is formed between any adjacent unit shelves. In a movable shelf configured to form a corresponding space, a vibration sensing device provided on the fixed unit shelf and a stop mechanism for fixing the movable unit shelf farthest from the fixed unit shelf in the condensed state. and a control device that automatically focuses the movable unit shelves and operates the stop mechanism upon reception of an earthquake sensing signal from the seismic sensing device. The object of the present invention is to provide an earthquake-resistant electric movable shelf that can automatically converge a group of movable unit shelves in an open passage state in the event of an earthquake to close the gaps between the frontages of each unit shelf and prevent items from falling within the shelves. be.

Since the present invention is configured as described above,
When an earthquake occurs, the control device is operated by an earthquake detection signal from the seismic sensing device, and the moving unit shelves are automatically focused by the operation of the control device, and the stopping mechanism is activated in this focused state. As a result, no matter what kind of horizontal excitation force is applied to the movable unit shelf, the movable unit shelf can reliably maintain a condensed state in which the shelf opening is sealed.

Embodiments The present invention will be described below with reference to the embodiments shown in FIGS. 1 to 7. A is a unit shelf in which a large number of shelf boards are attached to a shelf support frame vertically and horizontally; consists of one fixed unit shelf A ₀ and three self-propelled unit shelves A ₁ , A ₂ , A ₃ , and wheels pivotally supported at the lower ends of the self-propelled unit shelves A ₁ , A ₂ , A ₃ B are placed so as to be freely movable on guide rails C laid down on a horizontal floor surface parallel to each other in the depth direction.

Further, each unit shelf A ₁ , A ₂ , A ₃ is provided with an electric motor M ₁ , M ₂ , M _{3 ,} respectively.
M ₂ and M ₃ are connected to the wheel B with or without a reduction gear (not shown), and the electric motor
When M ₁ , M ₂ , M ₃ are rotated forward or reverse, each of the unit shelves A ₁ , A ₂ , A ₃ is adapted to move by itself to the right or left.

Furthermore, on each one end surface (the surface shown in FIG. 1) of each unit shelf A ₀ , A ₁ , A ₂ , A ₃ , there is a passage designation abnormality indicator light L ₀ , which displays the passage designation and the abnormal state.
L ₁ , L ₂ , L ₃ and passage designation changeover operation switches RC ₁ , RC ₂ , RC ₃ including the neutral position are provided respectively, and only one end surface of the fixed unit shelf A ₀ is equipped with a control circuit to be described later. A key switch CS for opening and closing the power supply, a power indicator lamp Lp, and a focusing push button switch PBC are additionally provided.

Furthermore _, emergency detection _{limit switches SB0 , SB1 , SB2 ,}
SB ₃ and stop limit switch LS ₀ , LS ₁ , LS ₂ ,
LS ₃ is provided, and each unit shelf A ₀ , A ₁ , A ₂ ,
Emergency detection bars (not shown) are attached to the movable pieces of the emergency detection limit switches _SB0 , _SB1 , _SB2 , and _SB3 so as to be oriented horizontally along the front end frontage of _A3 .

Next, the circuit of the above embodiment will be described. First, each switch body, relay body, and lamp are indicated by a capital letter, and each relay contact and switch contact is indicated by a lower case letter.

In addition, the above-mentioned passage designation switching operation switch RC ₁ ,
Restarting the circuit elements such as RC ₂ and RC ₃ and systematically enumerating new circuit elements, passage designation changeover operation switch; RC ₁ , RC ₂ , RC ₃ left and right travel switch a contact; rc ₁ l, rc ₂ l, rc ₃ l B contact of the left travel switch; rc ₁ l', rc ₂ l', rc ₃ l' A contact of the right travel switch; rc ₁ r, rc ₂ r, rc ₃ r its right Directional travel switch B contact;
rc ₁ r′, rc ₂ r′, rc ₃ r′ Operation detection relay and its relay a contact and b contact;
RCX, rcx, rcx' Passage interlock relay and its relay a and b contacts; IX, ix, ix' Focusing push button switch and its a contact; PBC, pbc Emergency stop push button switch;
PBS ₀ , PBS ₁ , PBS ₂ , PBS ₃ their a contact; pbs ₀ , pbs ₁ , pbs ₂ , pbs ₃ emergency stop relay and its relay b contact;
PBSX, pbsx′ Emergency detection limit switch:
SB ₀ , SB ₁ , SB ₂ , SB ₃ Switch b contact; sb ₀ ′, sb ₁ ′ sb ₂ ′, sb ₃ ′ Emergency detection relay; SB ₀ X, SB ₁ X, SB ₂ X, SB ₃ Relay b contact; sb ₀ x', sb ₁ x', sb ₂ x', sb ₃ x' Emergency detection circuit monitoring relay and its relay b contact;
SBX, sbx' Passage designated error indicator light; L ₀ , L ₁ , L ₂ , L ₃ emergency flashing relay and its relay a contact; FR, fr seismic sensor; GS seismic sensor b contact limit switch; gs' seismic sensor Relay and its a contact; GSX, gsx Solenoid relay and its b contact; SLX, slx Lock solenoid; SL Key switch and its a contact; CS, cs Power indicator lamp; Lp Run permission relay and its relay a contact; MS, ms Right Direct running relay; M ₁ R, M ₂ R, M ₃ R Relay A contact; m ₁ r, m ₂ r, m ₃ r Relay B contact; m ₁ r', m ₂ r', m ₃ r' Left running relay; M ₁ L, M ₂ L, M ₃ L Relay A contact; m ₁ l, m ₂ l, m ₃ l Relay B contact; m ₁ l', m ₂ l', m ₃ l ' Running detection relay and its a contact; MX, mx Timer and its time-limited operation b contact; T, t' Power failure recovery detection relay and its a contact; DCX, dcx Stop limit switch; LS ₀ , LS ₁ , LS ₂ , LS ₃ The b contacts are ls ₀ ′, ls ₁ ′, ls ₂ ′, and ls ₃ ′.

In addition, the passage designation changeover operation switch RC ₁ ,
RC ₂ and RC ₃ are 3-position changeover switches including the neutral position 0. If you tilt the knob counterclockwise in Figure 1 and position the tip at L on the display board, the left direction switch contact will be activated. rcil, rcil′ (operated switch
If you tilt the knob clockwise and position its tip at R on the display board, the right travel switch contact (rcir) will be switched.
Only rcir′ is switched.

The power supply circuit for the electric motors M ₁ , M ₂ , M ₃ includes a second
As shown in the figure, when right travel relay A contacts m ₁ r, m ₂ r, m ₃ r are closed,
The electric motors M ₁ , M ₂ , M ₃ rotate in the normal direction to drive the unit shelves.
A ₁ , A ₂ , A ₃ travel to the right, and conversely, when the left travel relay A contacts m ₁ l, m ₂ l, m ₃ l are closed, the electric motors M ₁ , M ₂ , M ₃ is reversed and the unit shelf A ₁ ,
A ₂ and A ₃ are designed to run to the left.

In addition, in the power failure recovery relay DCX shown in Fig. 2, when the power is turned on again after a power outage by tilting any of the passage selection operation switches RC ₁ , RC ₂ , or RC ₃ to the left or right. When the operation detection relay RCX operates and its b contact rcx' opens, the power failure recovery detection relay DCX cannot operate and no current is supplied to the 24V ₂ power supply circuit. .

Furthermore, since the circuit of the run permission relay MS is configured as shown on the left side of FIG. 3, the emergency detection limit switches SB ₀ ...SB ₃ are activated until the predetermined set time elapses after the timer T is activated. If the passageway interlock relay IX is not activated and the operation detection relay RCX is activated, the run permission relay MS is activated and self-holds, and its self-holding is controlled by the emergency detection limit switch SB ₀ ...
It is designed to be released when either SB ₃ or emergency stop push button switch PBS ₀ . . . PBS ₃ is activated or the set time of timer T has elapsed.

Furthermore, the passage designated abnormality indicator lights L ₀ , L ₁ , L ₂ ,
The _L3 circuit is configured as shown on the right side of Figure 3, so the passage designation switch
When you operate either RC ₁ , RC ₂ , or RC ₃ to the left or right, the indicator light Li corresponding to the passage specified by the switch RCi lights up to display the specified passage, and the emergency detection limit switch SBi When the switch is activated, the indicator light Li compatible with the switch SBi blinks intermittently to indicate an abnormality.

In addition, the circuits of the operation detection relay RCX and aisle interlock relay IX are configured as shown on the left side of FIG. Detection relay RCX is operated, and passageway interlock relay IX is operated and self-maintained when running detection relay MX is operated in this state.

Furthermore, since the circuit of the seismic sensor relay GSX is configured as shown on the left side of Fig. 6, when the seismic sensor GS detects an earthquake and its B contact limit switch gs' is opened, Seismic relay GSX is now set to inactive state.

Furthermore, since the circuits of the solenoid relay SLX and the lock solenoid SL are configured as shown in the center of FIG. 6, the self-propelled unit shelf A ₁ ,
A ₂ and A ₃ are focused to the left (stop limit switches LS ₀ , LS ₁ , and LS ₂ are operated, and their b contacts LS ₀ ',
ls ₁ ′, ls ₂ ′ are opened), when the left traveling relay M ₃ L of the third self-propelled unit shelf A ₃ and the seismic sensor relay GSX become inactive, the solenoid relay SLX becomes inactive and the third self-propelled unit shelf A 3 becomes inactive. 3 The lock solenoid SL installed on self-propelled unit shelf A ₃ becomes inactive, and the solenoid SL
A lock pin (not shown) provided on the floor projects downward and is engaged with a pin hole (not shown) provided on the floor.

Moreover, when the solenoid relay SLX becomes inactive, the relay b contact slx' connected to the trip coil of the no-use breaker NFB installed in the power supply circuit shown in Figure 2 is closed, and the power is automatically cut off. It is becoming more and more common.

Furthermore, the seismic sensor GS is configured as shown in FIG.
When the ball holder 1 falls due to vibration, the ball receiver 1 rises, the lever 3 tilts upward, and its B contact limit switch gs' is opened.

The embodiment illustrated in FIGS. 1 through 7 is constructed as described above, so that the focused and path-specific selector operating switch shown in FIG.
With all RCi set to neutral, for example, after closing the key switch CS to form a passage on the right side of the fixed unit shelf A ₀ , tilt only the passage designation switching operation switch RC ₁ clockwise and turn it. When the tip of 2 is switched to R on the display board, the power failure recovery detection relay DCX operates and self-holds, and the 24V ₁
In addition, power is supplied to the 24V ₂ power supply circuit, the operation detection relay RCX is activated, and the driving permission relay is activated.
The MS is operated and self-maintained, and as a result, the power supply circuits of the traveling relays MiS and MiS are set to the power supply state.

With the power supply circuits of the corresponding relays Mir and MiL being supplied with power in this way, the right travel switch a and b contacts rc ₁ r and rc ₁ r' are operated by the R switching operation of the passage designation changeover operation switch CR 1 _. Therefore, only the passage designated error indicator light L ₀ will be lit, and
A contact in the power circuit of the first right travel relay M ₁ R
rc ₁ r is closed and stop limit switch LS ₃
Since the b contact ls ₃ ′ of remains closed,
The current flows through the diode to the third right running relay.
M ₃ R is activated, and the third self- _propelled unit shelf A ₃ first travels to the right. When the third self-propelled unit shelf _A3 travels to the right and leaves the second self-propelled unit shelf _A2 , the stop limit switch _LS2 , which had been open until then, closes, and the second right traveling relay _{M2 is} closed. R operates and the second self-propelled unit shelf _A2 runs to the right, and after the second self-propelled unit shelf _A2 starts to travel to the right in the same way as described above, the first self-propelled unit shelf A ₁ runs to the right.

In addition, in a state where self-propelled unit shelves A ₁ , A ₂ , and A ₃ are traveling as a group to the right, the third self-propelled unit shelf
The limit switch stops when A ₃ reaches the right position.
When the b contact ls ₃ ' of LS ₃ is opened, the third right traveling relay M ₃ R becomes inactive, and the third self-propelled unit shelf A ₃ first stops. Next, the second self-propelled unit shelf
A ₂ comes into contact with the stopped third self-propelled unit shelf A _{3 and} the second
When the B contact LS ₂ ′ of the stop limit switch LS ₂ is opened, the third stop limit switch B contact LS ₃ ′ is also opened, so the second right travel relay M ₂ R is opened.
becomes inoperative, the second self-propelled unit shelf _A2 stops, and the first self-propelled unit shelf _A1 also stops in the same manner as described above, thus forming the required first passage.

Furthermore, if the aisle designation changeover operation switch RCi is tilted to either the left or right, either the corresponding switch contacts rcir or rcil will operate, and if the self-propelled unit shelf Ai starts to self-propel, the switching operation has already been performed. Unless the aisle designation changeover switch RCi is returned to neutral, even if other aisle designation changeover switches RCj are switched from neutral, the self-propelled unit shelf Aj will not be able to run on its own, and It is possible to prevent an accident in which a worker gets caught between units A ₀ ... A ₃ .

Furthermore, while operating the passage designation switching operation switch RCi to make the self-propelled unit shelf Ai self-propelled,
Or, after forming the required passage, if the passage designation changeover switch RCi is left in the switching state and an interlock is applied, the power is cut off and the power goes out, and when the power supply resumes supplying current. Since the operation detection relay RCX is activated, the power failure recovery detection relay DCX is not activated, and no current is supplied to the control power supply circuit 24V ₂ , preventing the self-propelled unit shelf Ai from self-propelled, ensuring safety. be done.

In addition, as mentioned above, the passage designation switching operation switch
Tilt only RC ₁ clockwise to install the fixed unit shelf.
After successfully forming the first passage between A ₀ and the first self-propelled unit shelf A ₁ within the time limit operation time of the timer T,
Set the passage designation changeover operation switch RC ₁ to the neutral position 0.
In the state where the switch is returned to the state, the run permission relay MS remains self-held. If an earthquake occurs under these conditions, the seismic sensor GS will operate and its B contact limit switch will be activated.
gs' is opened and the seismic sensor relay GSX becomes inactive, so the b contact of the seismic sensor relay at the right end in Figure 5
gsx′ is closed, all passage designation changeover switch RC ₁ ,
By closing the operation detection relay b contact rcx' due to the neutral setting of RC ₂ and RC ₃ , voltage is applied to the third, second, and first left traveling relays M ₃ , M ₂ , and M ₁ . Become. At this time, the stop limit switch LS ₀ is inactive and its B contact LS ₀ ' remains closed, so current flows to the first left running relay M ₁ L, and the same relay M ₁ L works, the first self-propelled unit shelf
A ₁ first runs to the left. As described above, following the start of leftward travel of the first self-propelled unit shelf _A1 , the second self-propelled unit shelf A1
The third self-propelled unit shelves A ₂ and A ₃ sequentially run to the left and the first
As shown in the figure, all self-propelled unit shelves A ₁ , A ₂ ,
When A ₃ converges and stops, the circuit contacts ls ₀ ′, ls ₁ , m ₃ l, gsx of the solenoid relay SLX shown in FIG.
are all opened and the solenoid relay SLX becomes inactive, so the solenoid relay a contact slx in the circuit of solenoid SL is opened, and the solenoid SL that has been operating until now becomes inactive.
A lock pin attached to the third self-propelled unit shelf _A3 projects into a pin hole on the floor and is thus locked. At the same time, the power is automatically cut off by the operation of the trip coil of the no-phase breaker NFB.

After successfully forming the required passage in this way,
If an earthquake occurs with all aisle designation switching operation switches RC ₁ , RC ₂ , and RC ₃ switched back to their neutral positions and the interlocks released, the self-propelled unit shelf Ai will automatically self-propel to the left. , after being focused,
Since the third self-propelled unit shelf _A3 is locked, the first
The second self-propelled unit shelves A ₁ and A ₂ are extremely perfect because the third self-propelled unit shelf A _{3 locked with the fixed unit shelf A 0 is} prevented from running out of control.

Moreover, in the event of an earthquake, there is no phase breaker.
The power is automatically cut off by the operation of the NFB trip coil, which reliably prevents fires caused by electrical leakage.

Further, in the above embodiment, the passage was formed by operating the passage designation switch, but the present invention can also be applied to other types of electric self-propelled shelves.

Moreover, in the above embodiment, the pin is engaged with the hole on the floor to lock the unit shelf, but the unit shelf may be fixed by a wedge-type braking mechanism as shown in Utility Model Application No. 54-46837.

Effects of the Invention As described above, in the present invention, no matter what kind of horizontal excitation force is applied to the movable unit shelf when an earthquake occurs, the movable unit shelf can reliably maintain the focused state in which the shelf openings are sealed. Therefore, the articles stored in the movable shelf are prevented from falling from the shelf opening into the space corresponding to the passageway, and damage to the articles and the floor surface below the passageway is prevented.

[Brief explanation of the drawing]

FIG. 1 is a side view illustrating an embodiment of an earthquake-resistant electric movable shelf according to the present invention, FIG. 2 is a power supply circuit diagram of a motor in the embodiment, and FIGS. 3 to 6 are control diagrams of the embodiment. The circuit diagram, FIG. 7, is a schematic explanatory diagram of the vibration sensor used in the above embodiment. A ₀ ... Fixed unit shelf, Ai... Self-propelled unit shelf (i is a number corresponding to the first, second, third unit shelf, and the same applies below), B... Wheels, C... Guide rail, CS... ...Key switch, DCX...Power failure recovery detection relay, FR
...Emergency flashing relay, GS...Seismic sensor, GSX...
Seismic sensor relay, IX...Aisle interlock relay, Li...Aisle designated error indicator light, Lp...Power indicator lamp, LSi...Stop limit switch, Mi...
…Electric motor, MiL…Left travel relay, Mi…Right travel relay, MS…Run permission relay, MX…
...Traveling detection relay, PBC...Focusing push button switch,
PBSi...Emergency stop push button switch, PBSX...Emergency stop relay, RCi...Aisle designation switching operation switch, RCX...Operation detection relay, SBi...Emergency detection limit switch, SBiX...Emergency detection relay,
SBX……Emergency detection circuit monitoring relay, SL, SLi…
...Rotux solenoid, SLX...Solenoid relay, T...Timer.

Claims (1)

[Claims] 1. Constructed so that a space corresponding to a passage can be formed between any adjacent unit shelves among a movable unit shelf and a fixed unit shelf whose respective adjacent frontages collide with each other when converging and which are movable in the depth direction. In the electrically operated movable shelf, the vibration sensing device provided on the fixed unit shelf, a stop mechanism that fixes the movable unit shelf in the focused state, and reception of an earthquake sensing signal from the vibration sensing device, cause the movement to be stopped. An earthquake-resistant electric movable shelf comprising: a control device that automatically focuses unit shelves and operates the stop mechanism.