JPH108801A - Lock mechanism for safety handrail on elevator landing for construction sitelelvator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent workers and materials from falling odd by securely and automatically locking a safety handrail at closing time provided on a temporary scaffold for the opening of an elector in a building or construction site. SOLUTION: A running rod joining portion 7 is formed on one end of a casing 2 of a laterally long cylindrical shape. A base end portion of a locking claw 12 for hook-stopping the running rid 26 of a safety handrail in the state of being fitted in the running rod joining portion 7 is pivoted on the casing 2. The locking claw 12 and a drive portion 13 provided in the casing 2 are interconnected to make the locking claw 12 horizontally switchable so that the tip of the locking claw 12 project out of and recede inside one side of an opening side of the running rod joining portion 7. Next, an opening-closing verification switch 3 which is set to a locked state when it is turned on is provided in the casing 2. The running rod 26, when fitted into the running rod joining portion 7 is automatically locked. The tip of the locking claw in the locked state is made to extend toward the opening of the running rod joining portion 7 around the running rod 26 in the state of being fitted into the running rod joining portion 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator for a building site elevator, which can securely lock a safety handrail installed on a temporary scaffold at an opening of an elevator at a building site or a construction site. The present invention relates to a lock mechanism for a safety handrail.

[0002]

2. Description of the Related Art Conventionally, in a construction site, a construction site, and the like, an openable and closable safety handrail attached to a temporary scaffold at an opening of an elevator always has a key for fixing a traveling rod in consideration of safety. However, there are many cases where the safety handrail is closed and the lock is not securely locked after being closed, and the safety handrail is accidentally opened and there is a danger of accidents caused by falling workers and materials. Had the disadvantages that existed.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a safety handrail installed on a temporary scaffold at an opening of an elevator, which automatically locks when closed, and prevents the occurrence of a disaster due to a fall of a worker or material on the temporary scaffold at the opening of the elevator. It is an object of the present invention to provide a lock mechanism for a safety handrail at an entrance / exit of an elevator for a construction site which is prevented.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, in view of the problem that a safety handrail with a key attached thereto is apt to forget to lock the key after being closed or to be not securely locked. The traveling rod joint where the traveling rod fits
The base end of an arc-shaped lock claw that is formed so as to extend in the vertical direction on one end surface of a casing that is horizontally long and fixed to a temporary scaffold, and that locks a traveling rod fitted in a traveling rod joint. The lock claw is connected to the drive unit provided in the casing while being pivotally attached to the lock claw, so that the lock claw can be swung horizontally so that the tip of the lock claw protrudes and retracts from the opening side of the traveling rod joint. By making the distal end side of the lock claw in the locked state go around the opening side of the traveling rod joint of the traveling rod fitted in the traveling rod joint, the locking claw in the traveling rod joint is Do not pull out the traveling rod from the traveling rod joint by the tip of the lock claw projecting from one side on the opening side in the traveling rod joint,
A secure locking state can be ensured.

Further, a closing confirmation switch for confirming the presence or absence of the traveling rod in the traveling rod joint portion is provided on the casing, and when the closing confirmation switch is turned "ON", the drive section is operated to be in the locked state. When the safety handrail is closed by the control, the traveling rod is inserted into the traveling rod joint and controlled so that it is automatically locked, and the elevator does not move up and down unless the closing confirmation switch is in the "ON" state. To solve the above problem.

In addition, an elevator stop confirmation switch is separately provided on the temporary scaffold. When the elevator stops and the stop confirmation switch is turned “ON”, the drive unit operates to release the locked state, and the other floors are unlocked. By controlling the drive unit not to operate and to keep the locked state, only the lock device body on the elevator stop floor is released from the locked state only after confirming that the elevator has stopped, and the other floors are released. It also prevents the occurrence of disasters caused by workers or material falling from the ground.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a lock device main body, which is formed in a rectangular cylindrical shape, and a closure confirmation switch 3 and a lock are provided in a horizontally placed casing 2. The mechanism unit 4 is disposed to form the lock device main body 1.

[0008] Both ends of the casing 2 have openings 5, 5a.
At the upper and lower portions of the opening edges of the opening portions 5 and 5a on one end side, arc-shaped notches 6 and 6a into which a traveling rod 26 of a safety handrail 23 described later is fitted are formed. And the casing 2
A support fixture 8 is fixedly mounted on the back side of the vehicle.

A closing confirmation switch 3 provided at an upper portion in the casing 2 is set to an "ON" state when fitted into the traveling rod joint 7 and an "OFF" state when not fitted.
The distal end of the switch rod 9 projects toward the traveling rod joint 7 and the traveling rod joint 7 is securely turned on.
The switch rod 9 is biased toward the "OFF" position, and a rotatable roller 10 is provided at the tip of the switch rod 9.

When the closing confirmation switch 3 is in the "ON" state, that is, when the traveling rod 26 is fitted into the traveling rod joint 7, the elevator E can be raised and lowered, and the closing confirmation switch 3 is set to " In the "OFF" state, that is, when the traveling rod 26 is not fitted in the traveling rod joint 7, the elevator E
Is controlled so as to remain stopped even when a lifting button (not shown) is pressed.

A lock mechanism 4 provided at a lower portion in the casing 2 has a substantially crescent-shaped lock claw 12 provided with an arc-shaped recess 11 having a slightly larger diameter than a traveling rod 26 of a safety handrail 23 described later.
And the drive unit 13 which makes the lock claw 12 freely horizontal.

The lock claw 12 is disposed on a substrate 15 provided at one end side in the casing 2 and provided with an arc-shaped notch 6b at the tip edge side corresponding to the traveling rod joint portion 7.
The edge of 11 is substantially aligned with the notch 6b, and the base end is pivotally connected to the substrate 15, so that the tip of the lock claw 12 is
From the side of the opening side of the
The front end side of 12 is made to go around the opening side of the traveling rod joint 7 of the traveling rod 26 to be described later, which is fitted into the traveling rod joint 7.

A locking projection 16 is provided on the outside of the tip of the locking claw 12.
And a stopper 16a corresponding to the hooking projection 16 is provided on the substrate 15 so that the locking claw 12 in a swinging state at the time of locking contacts the hooking projection 16 with the stopper 16a. It stops by doing.

The drive unit 13 includes a stop confirmation switch 22 described later.
Or, when the closing confirmation switch 3 is turned "ON", the locking claw 12 is caused to swing forward and backward so as to be unlocked and unlocked. Specifically, a solenoid 18 for retreating the armature 17 by energization, and the solenoid 18 The armature 18 has a base end at the tip end thereof, a connecting rod 14 having a tip end pivotally mounted near the front end side of the intermediate portion of the lock claw 12, and a means for advancing the armature 17 in the solenoid 18 in a light-shielded state.

The connecting rod 14 is a screw rod, which penetrates a rising portion 19a of an L-shaped plate 19 fixed in the casing 2, and which is connected to the connecting rod
A nut-shaped spring receiver 20 is screwed near the distal end side, and the forward means of the armature 17 is provided as a return spring 21 which is externally disposed at an intermediate portion of the connecting rod 14 corresponding to between the spring receiver 20 and the L-shaped plate 19. I have.

At the time of unlocking, the armature 17 is retracted by energizing the solenoid 18, and the lock claw 12 swings backward through the connecting rod 14, so that the tip side of the lock claw 12 is retracted, When the return spring 21 is compressed, the energization of the solenoid 18 is shut off during locking, and the elastic claw 12 returns to the lock claw 12 via the spring receiver 20 and the connecting rod 14 by the elastic restoring force of the return spring 21 in the compressed state.
Swings forward and moves the amateur 17 forward.

If the stroke of the drive unit 13 matches the forward / backward swing of the lock claw 12, the engaging projection 16 and the stopper 16a may be omitted.

Reference numeral 22 denotes a stop confirmation switch provided on the temporary scaffold S for opening to confirm that the elevator E has stopped.
If the stop confirmation switch 22 remains in the “ON” state for a predetermined time, the locked state by the lock device main body 1 is released.
That is, even if the stop confirmation switch 22 of the passage floor is momentarily turned “ON” and immediately turned “OFF” when passing through the elevator E, the lock device body 1 of the corresponding floor is controlled. The locked state is not released.

When the stop confirmation switch 22 is turned "ON" due to the stop of the elevator E, the locked state of the stop floor by the lock device body 1 is released, but the stop confirmation switches 22 of the other floors are accidentally turned on. Even if it is in the “ON” state, control is performed so that the locked state by the lock device main body 1 on the corresponding floor is maintained without being released.

Further, the stop confirmation switch in the above embodiment is used.
Reference numeral 22 denotes a state in which the locked state by the lock device main body 1 is released if it remains in the "ON" state for a predetermined period of time. However, the present invention is not limited to this type. In other words, the lock state may be released, for example, the stop or passage of the elevator E may be confirmed, and the lock state by the lock device body 1 may be released only when the elevator E is stopped.

Reference numeral 23 denotes a safety handrail which is provided on the temporary provisional scaffold S of the opening of the elevator E so as to be openable and closable. The front and rear two-stage grid-like rods 25, 25a pivotally connected to each other at pivots 24, 24a. The traveling rod 26 and the fixed rod 27 are moved along both ends of the rods 25 and 25a.
Brackets 28, 28a mounted on the upper and lower sides to pivot 29,
At 29a ..., it is connected to the safety handrail 23.

The grid-like rods 25, 25a are arranged at equal intervals between the front part and the rear part, and the rods 30, 30b... And the rods 30a, 30c.
Are crossed obliquely, and are pivotally connected to each other at pivots 24, 24a,.

Reference numeral 31 denotes one of the columns adjacent to the traveling rod 26 when the safety handrail 23 is closed. The column 31 is fixed to the temporary scaffold S at the opening of the elevator.

The lock device main body 1 is fixed to the column 31 by the column fixing member 8 so that the traveling rod joint 7 faces the traveling rod 26.

A fixing rod 27 is provided on the other side of the column 31 which is erected and fixed on the temporary scaffold S for opening the elevator to support the safety handrail 23.
a is fixed in parallel with a clamp (not shown).

As the forcible unlocking means 32 of the lock device main body 1 in the event of an accident such as a power failure, a swingable lever 33 is provided in the other end of the casing 2, and the lever 33 and the drive unit 13 are provided. The armature 17 of the solenoid 18 is connected to the armature 17 via a link mechanism 34, and a door 34 that can be opened and closed is provided on the other side surface of the casing 2, and the armature 17 is opened by opening the door 34 and tilting the lever 33. May be forcibly retracted and unlocked.

Next, the operation of the lock mechanism of the safety handrail at the entrance / exit of the elevator for construction sites according to the present invention will be described.
Is in the stop state, the stop confirmation switch 22 is set to “O
N ", the closing confirmation switch 3 of the safety handrail 23 is" OFF ",
The lock mechanism 4 is in the released state, and the elevator E does not move up or down even if the elevator button (not shown) is pressed in this state.

Then, the safety handrail 23 is extended, and the support 31 is extended.
The traveling rod is connected to the traveling rod joint 7 of the lock device body 1 fixed to the
When 26 is inserted, the closing confirmation switch 3 is turned “ON” at the same time.
Then, the power supply to the drive unit 13, ie, the solenoid 18, in the lock mechanism unit 4 is cut off, and the return spring 21 in the compressed state is turned off.
With the elastic restoring force of the arm, the lock claw 12 swings forward around the base end thereof via the connecting rod 14 to return to the normal state,
17 follows and projects forward, the tip side of the lock claw 12 projects from the side of the opening of the traveling rod joint 7 and engages with the traveling rod 26,
The safety handrail 23 is locked and completely closed, so that the elevator E can be moved up and down.

When the elevator E is moved up and down, the stop confirmation switch 22 is turned "OFF", and immediately before the stop on the next floor or simultaneously with the stop, the next stop confirmation switch 22 is set to "O".
N "state, and then the next stop confirmation switch 22
Remains in the "ON" state, it is recognized that the elevator E has stopped, and the drive unit 13 of the lock mechanism unit 4 in the lock device body 1 in only the stop floor, that is, the solenoid 18 is energized and the armature 17 retreats. At the same time, the return spring 21 is compressed, and the lock claw 12 is pivoted backward around the base end thereof through the connecting rod 14 to unlock, and the occupant can open and close the door (not shown) of the elevator E and Open the safety handrail 23 and get on and off.

If the elevator E passes the next floor,
The next stop confirmation switch 22 becomes the "ON" state and immediately becomes the "OFF" state, and the locked state by the lock device body 1 is not released. Therefore, the stop confirmation switch 22 other than the stop floor is erroneously turned "ON". Even in this state, the locked state of the lock device main body 1 on the corresponding floor is not released, and the safety handrails 23 other than the stop floor are prevented from being accidentally opened.

[0031]

In summary, the present invention relates to a lock mechanism for a safety handrail 23 which can be freely opened and closed and which is installed at a landing of an elevator E for a construction site on a temporary scaffold S.
Since the traveling rod joint 7 extending vertically is recessed at one end surface of the horizontally long cylindrical casing 2 fixed to the base 31, a safety handrail 23 is provided.
When the is closed, the traveling rod 26 can be reliably positioned at a position where the locking claw 12 described below is engaged.

Further, a base end of a lock claw 12 provided with a concave portion 11 at a position corresponding to the traveling rod joint 7 is pivotally connected to the casing 2, and the lock claw 12 is connected to a drive unit 13 provided in the casing 2. Then, the lock claw 12 can be horizontally swung so that the tip of the lock claw 12 protrudes and retracts from the side of the opening side of the traveling rod joint 7, so that the opening of the traveling rod joint 7 can be opened in the locked state. Since the lock claws 12 protrude from the section, the traveling rod 26 in the traveling rod joint 7 cannot pass through the opening of the traveling rod joint 7, and the safety handrail 23 does not accidentally open, and the safety handrail 23 Can be securely locked.

Further, the casing 2 is provided with a closing confirmation switch 3 which is turned on when the traveling rod 26 of the safety handrail 23 is fitted into the traveling rod joint 7 and the driving section 13 is operated to be locked. Therefore, when the safety handrail 23 is closed, that is, when the traveling rod 26 is fitted into the traveling rod joint 7, the closing confirmation switch 3 is turned “ON” and the lock claw 12 is hooked on the traveling rod 26, so that the automatic operation is performed. The elevator E can be moved up and down while the closing confirmation switch 3 is in the "ON" state.
Unless the safety handrail 23 is properly closed, the elevator E does not move.
Can be prevented from being forgotten to close, and the effect of preventing the occurrence of a disaster due to a fall of a worker or material from the temporary scaffolding S at the opening of the elevator E can be further improved.

Therefore, since the lock device main body 1 is provided with the closing confirmation switch 3 and the lock mechanism unit 4 in the casing 2 collectively, the compactness can be achieved. Since the traveling rod 26 is inserted into the traveling rod joint 7 since it is formed on one end surface of the casing 2 in the vertical direction, both the vertically arranged closing confirmation switch 3 and the lock claw 12 can be synchronously operated.

"ON" when the elevator E stops.
Since the stop confirmation switch 22 for the elevator E that releases the locked state when the state is reached is provided separately on the temporary scaffold S, the safety handrail 23 cannot be opened unless the elevator E is stopped, that is, on the floor other than the stop floor. Since the safety handrail 23 cannot be opened, it is possible to prevent workers and materials from being dropped due to erroneous opening of the safety handrail 23.

When the lock claw 12 swings greatly during locking, the travel of the traveling rod 26 from within the traveling
However, since the stopper 16a for stopping the lock claw 12 at the locking position is provided on the casing 2 side, even if the driving portion 13 has a potential to move the lock claw 12 to a position higher than the locking position. Even if there is, the locking claw 12 can be securely stopped at the locking position and locked, so that when the driving unit 13 is installed, it can be installed without determining an accurate installation location.

The main components of the drive unit 13 are solenoid 18
And a connecting rod at the tip of the amateur 17 in the solenoid 18.
Connect the base end of the connecting rod 14
The connecting rod 14 penetrates the L-shaped plate 19 fixed in the casing 2 and corresponds between the L-shaped plate 19 and a spring receiver 20 provided near the distal end of the connecting rod 14. Since the return spring 21 is externally arranged in the middle of the connecting rod 14, the armature 17 is retracted and unlocked by energizing the solenoid 18, and the armature 17 becomes free by shutting off the energization of the solenoid 18, Restoration of the return spring 21 in the compressed state allows the spring receiver 2
0, To advance and lock through the connecting rod 14, when the stop confirmation switch 22 or the close confirmation switch 3 is turned "ON", the unlocking is possible only by turning on and off the power to the solenoid 18. Therefore, the lock can be unlocked by simple control means.

Further, since the elastic force of the return spring 21 decreases with time, there is a possibility that the lock claw 12 does not swing by a required amount at the time of locking. However, the connecting rod 14 is formed in a screw shape, and the spring receiver 20 is connected to the connecting rod.
Since the spring receiver 20 is screwed into the connecting rod 14, the position of the spring receiver 20 with respect to the connecting rod 14 can be adjusted. The force can be maintained, so that the locking by the lock claw 12 can be ensured.

Also, a forcible unlocking means provided in the casing 2
Since the lock state can be released by swinging the lock claw 12 by 32, the lock device main body 1 is normally in the lock state.
Since the locked state of the lock device main body 1 can be released by the forced unlocking means 32 irrespective of the stop confirmation switch 22, the safety handrail 23 must be forcibly opened by an emergency stop between the floors of the elevator E, material loading, or the like. The practical effect is extremely large, for example, it is possible to cope with the case where it is not possible.

[Brief description of the drawings]

FIG. 1 is a front view of a lock mechanism of a lock device main body.

FIG. 2 is a sectional view showing a locked state of FIG. 1;

FIG. 3 is a sectional view showing the unlocked state of FIG.

FIG. 4 is a front view showing an installation state of a lock mechanism according to the present invention.

FIG. 5 is a schematic plan view of FIG.

FIG. 6 is a sectional view of a main part of a lock device main body provided with a forcible unlocking means.

FIG. 7 is an explanatory diagram showing a control process of the lock mechanism.

[Explanation of symbols]

 2 Casing 3 Closing confirmation switch 7 Travel rod joint 8 Strut fixing device 11 Recess 12 Lock claw 13 Drive unit 14 Connecting rod 17 Amateur 18 Solenoid 19 L-shaped plate 20 Spring receiver 21 Return spring 22 Stop confirmation switch 23 Safety handrail 26 Traveling rod 32 Forcible unlocking means E Elevator S Temporary scaffold

Claims (5)

[Claims] 1. A lock mechanism for a safety handrail that can be freely opened and closed and installed at a landing of an elevator for a construction site on a temporary scaffold, wherein a running rod joint extending vertically is recessed at one end surface of a casing fixed to a column of the temporary scaffold. A base end of a lock claw provided with a concave portion at a position corresponding to the traveling rod joint portion is pivotally connected to a casing, and the lock claw is connected to a driving portion provided in the casing to form a distal end portion of the lock claw. The lock claw can be swung horizontally so that it protrudes and retracts from the side of the opening of the running rod joint, and the running rod of the safety handrail is inserted into the running rod joint and becomes “ON”, driving A lock switch is provided on the casing to activate the part and lock the elevator, and when the elevator stops, the elevator is turned on to release the locked state when the elevator stops. A lock mechanism for a safety handrail at an elevator for a building site, wherein a confirmation switch is separately provided on a temporary scaffold. 2. A locking mechanism for a safety handrail in an elevator for a construction site according to claim 1, wherein a stopper for stopping said locking claw at a locking position is provided on a casing side. 3. A main component of the drive unit is a solenoid, and a base end of a connecting rod is pivotally mounted on an end of an armature of the solenoid, and a distal end of the connecting rod is pivotally mounted near a distal end of an intermediate portion of a lock claw. The connecting rod penetrates an L-shaped plate fixed in the casing, and a return spring is externally arranged at an intermediate portion of the connecting rod corresponding to a space between the L-shaped plate and a spring receiver provided near the leading end of the connecting rod. A lock mechanism for a safety handrail at a platform of a construction site elevator according to claim 1 or 2. 4. A lock mechanism for a safety handrail in a landing of an elevator for a construction site according to claim 3, wherein said connecting rod is screw-shaped and said spring receiver is screwed into said connecting rod. 5. The elevator for a building site elevator according to claim 1, wherein the locked state is released by rocking the lock claw by a forcible unlocking means provided in the casing. Locking mechanism for safety handrails at the site.