JP3512287B2 - Locking device for handrails - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a handrail that is disposed at a helicopter port of a ship or the like. 2. Description of the Related Art For example, in order to receive a thrust generated by a helicopter rotor, an aluminum panel or the like is attached to a deck of a ship using a handrail surrounding the deck, and an aluminum panel or the like is attached to the deck. There is a type in which a substantial port area is expanded by tilting substantially horizontally, and a lock device is provided which holds the handrail in an upright state surrounding the deck except when the helicopter is landing or landing. FIGS. 5 and 6 show such lock devices (Japanese Patent Application No. 6-140535).
issue). Reference numeral 1 denotes a flip-up handrail which surrounds a helicopter loading / unloading deck 2 and is hinged to a shore 3 with its base end as a fulcrum. Rotate between the deployed position. The bracket 4 is fixed to the deck 2 side, and the hydraulic cylinder for raising and lowering the handrail is pin-connected to the bracket 4 and the handrail 1 on the head side and the rod side, respectively. A lock plate 6 having a pin hole 5 is provided on the handrail 1 so as to project toward the deck 2, and a concave portion 7 for receiving the lock plate 6 is provided on the bracket 4. A pin hole 8 communicating with the pin hole 5 is formed in the bracket 4 at the upright position of the handrail 1 where the lock plate 6 abuts the depth of the concave portion 7, and the lock pin 9 can advance and retreat in the axial direction with the tip directed toward the pin hole 8. Is provided. A hydraulic cylinder 11 is connected to the lock pin 9 via a plate 10, and when the hydraulic cylinder 11 operates to the extension side at the upright position of the handrail 1, the lock pin 9 enters the pin hole 5 of the lock plate 6. Bracket 4 on deck 2 side
When the hydraulic cylinder 11 is actuated to the compression side while the handrail 1 is restrained, the lock pin 9
And the handrail 1 is released from the bracket 4 on the deck 2 side. Reference numeral 12 denotes a wire for suspending the handrail 1 at the deployed position, which is routed via the bracket 4. FIG. 7 shows another conventional apparatus (Japanese Utility Model Laid-Open No. 2-99084). A lock plate 22 having a pin hole 21 is protruded toward the deck side on an upside down handrail 20 that pivots around the base end, and is inserted into the pin hole 21 of the lock plate 22 at the upright position of the handrail 20 on the deck side. Lock pin 23 is disposed. A spring (not shown) for urging the lock pin 23 in the insertion direction.
Locking member 2 for holding lock pin 23 at the non-insertion position
4 and a lever 2 for releasing its holding in conjunction with the handrail 20
5 are provided. 26 is a case for accommodating the spring together with the lock pin 23, and 28 is an operating lever of the lock pin 23. When the handrail 20 is rotated to the upright position while the lock pin 23 is held at the non-insertion position by the locking member 24, the lever 25 is moved to the lock plate 22 of the handrail 20.
To release the holding of the lock pin 23 by the locking member 24, the lock pin 23 is urged by a spring and inserted into the pin hole 21 of the lock plate 22, and the handrail 20 is restrained in an upright state on the deck side. I do. When unlocking,
The lock pin 23 is manually returned to the non-insertion position and the locking member 2 is
4 is held. 26 is a case for accommodating the spring together with the lock pin 23, and 28 is an operating lever of the lock pin 23. [0008] However, in the former, a power unit 13 is used which incorporates a hydraulic cylinder 11 for driving the lock pin 9 together with a tank and an electric pump, and the operation thereof is controlled by a control device. However, there was a problem that the deck area was greatly occupied by these equipments. In addition to the mechanical components such as the lock pin 9 and the lock plate 6, the power unit 13, its control device, and the wiring between them are not only increased in manufacturing cost and maintenance cost, but also increased.
There was a problem that an operation mechanism for manually locking and unlocking was required for troubleshooting. In the latter case, the lock is automatically operated, but for releasing the lock, the lock pin 23 must be manually held at the non-insertion position, and the operation is performed by bending down the hips. There was a problem of imposing a heavy burden. If the lever 25 is accidentally pulled when unlocked, the lock pin 23 projects to the insertion position.
There has been a problem that a state in which it cannot be restrained even when the 0 is turned to the standing position occurs. The present invention has been made in view of such a problem, and an object of the present invention is to provide a device which can accurately lock and release a handrail with a simple mechanical configuration. Means for Solving the Problems A locking device for a handrail type handrail
A lock lever provided with a hook that locks the locking ring at the upright position of the handrail by projecting a locking ring toward the side of the handrail that pivots around the base end, and a lock lever. a spring for urging its fulcrum the hook engaging direction, and a latch means for holding the latch in the hook unlocked position against the spring is provided, the latch hand
As a step, lock the base end as a fulcrum adjacent to the side of the lock lever.
Latch lever that can rotate in the same direction as the
With the lock lever spring around the fulcrum
A spring that urges in the opposite direction to the biasing direction, and a latch lever
Against the spring to rotate the lock lever.
Follow the pin and lock lever at the hook unlock position.
A stopper is provided to keep the latch lever and pin from sliding.
I did. When the lock lever is rotated against the spring, it is held at the hook unlocked position by the latch means. In this state, the lock ring of the handrail is released from the engagement of the hook, so that the handrail can be tilted to the substantially horizontal deployed position. When the holding of the latch means is released, the lock lever is urged by the spring to rotate in the hook locking direction, and locks the locking ring of the handrail rotated to the predetermined standing position with the hook. Turn the lock lever against the spring.
The latch lever slides with the pin at the stopper.
Lock lever is held in the hook unlocked position to reduce
Is done. From this state, release the latch lever with its spring.
When the lock lever is rotated against the
The pin is released and urged by the spring in the hook locking direction.
And rotate. 1 and 2, reference numeral 30 denotes an upside-down handrail which surrounds a helicopter loading / unloading deck, and hinges to a port 31 with its base end as a fulcrum. Be combined. The handrail 30 has a hydraulic cylinder (not shown) interposed between the deck 32 and the handrail,
As the cylinder expands and contracts, the cylinder rotates between a substantially vertical standing position and a substantially horizontal deployed position. A lock ring 33 is provided on the handrail 30 so as to protrude toward the deck 32, and forms an engagement hole 33a for a lock lever 34 described later. A lock lever 34 having a hook 35 for locking the lock ring 33 at the upright position of the handrail 30 is provided on the deck 32 side. A pair of side brackets 37 are erected on both sides of the base 36, and the lock lever 34 is rotatably supported by the side brackets 37 via a shaft 38 at an intermediate position. The base 36 is connected to a stay 39 fixed to the deck 32 side. A spring 40 for urging the lock lever 34 about its axis 38 in the hook locking direction is attached.
A detent 41 for restricting rotation of the lock lever 34 at the hook locking position is provided. The distal end of the lock lever 34 is formed on a tapered guide surface 42 that guides engagement with the hook 35 when pressed by the locking ring 33. Is provided with a latch mechanism 43 for holding the same. The latch mechanism 43 is disposed adjacent to and intersects the side surface of the lock lever 34.
Is provided. The latch lever 44 is rotatably supported at its base end by the side bracket 37 via a shaft 45, and urges the latch lever 44 about the shaft 45 in a direction opposite to the direction in which the spring 40 of the lock lever 34 is urged. Spring 46
Is attached. A pin 47 for receiving the latch lever 44 against the spring 46 projects from the side surface of the lock lever 34, and the pin 47 slides on one side of the latch lever 44 as the lock lever 34 rotates. , Lock lever 34
The latch lever 44 is rotated in the same direction. In order to prevent the lock lever 34 from sliding with the pin 47 at the hook non-locking position and the hook locking position, a stopper 48 for locking the pin 47 is provided on one side of the latch lever 44. With such a configuration, the lock lever 34
When the pin 47 is rotated from the hook locking position in a direction against the spring 40 as shown in FIG.
Is rotated downward against the spring 46 and slides below the stopper portion 48. In this state, the lock lever 34
Even when the turning operation of the lock lever 34 is released, the lock portion 34 is held at the hook non-locking position because the stopper portion 48 of the latch lever 44 suppresses sliding with the pin 47. Accordingly, the locking ring 33 of the handrail 30 is released from the engagement of the hook 35, so that the handrail 30 can be tilted to the substantially horizontal deployed position. From this holding state, when the latch lever 44 is rotated against its spring 46 as shown in FIG.
The pin 47 is released from the stopper portion 48, and the lock lever 34 is urged by the spring 40 to rotate in the hook locking direction. When the handrail 30 is turned to the standing position, the lock ring 33 of the handrail 30 is moved to the lock lever 34.
The lock ring 33 enters while pushing and opening the hook 35 along the tapered guide surface 42 from the point of contact with the tip of the hook, and engages with the hook 35 at a predetermined standing position.
Therefore, the handrail 30 is restrained in a substantially vertical standing state by the shear resistance of the lock lever 34, and the latch lever 44 slides the pin 47 downward with the stopper 48 (the lock lever 3).
Handrail 3 in order to suppress the rotation of the handrail 4 in the hook unlocking direction).
The constraint of 0 can be properly maintained. In this case, there is a possibility that the release of the latch mechanism 43 may be forgotten before the handrail 30 is erected, but even in such a case, the latch lever 44 is required after the handrail 30 is erected.
Is released, the lock lever 34 is urged by the spring 40 to rotate and lock the locking ring 33 of the handrail 30. That is, even if the handrail 30 is rotated to the upright position while the lock lever 34 is held at the hook non-locking position, if the latch mechanism 43 is subsequently released, the handrail 30 can be restrained in the upright state. Lock lever 34 and latch lever 44
Since the can be operated with a foot or the like in the form of a pedal, it is possible to efficiently lock and release the handrail 30 without imposing a large burden on the operator. Further, since this device has a simple configuration and a small number of parts, and does not use a locking actuator such as a hydraulic cylinder, it is advantageous in terms of space and cost for equipment on the deck 32 and the like. [0026] In the locking device for a handrail, a locking ring is protruded toward the side of the handrail pivoting about a base end, and the locking ring is locked at the standing position of the handrail. a locking lever comprising a hook, and a spring for urging the lock lever to the hook engagement direction to the fulcrum, and a latch means for holding the latch in the hook unlocked position provided against the spring, as the latch means Locle
Same as the lock lever with the base end as a fulcrum adjacent to the side of the bar
Latch lever that can rotate freely in the direction
Around the lock lever in the direction opposite to the biasing direction of the spring
Press the spring and latch lever against the spring.
Pin to catch and follow the rotation of the lock lever
And the latch lever at the unlocked position of the lock lever hook.
By providing a stopper to suppress sliding with the pin
To the hook lock position by releasing the latch means.
Lock lever can securely hold the handrail in the upright position.
You. In addition, the number of parts is small with only a mechanical configuration,
This is advantageous in terms of pace and cost. In addition, lock
Use your feet to release the latch as well as the lever.
Operable, so the burden on workers can be reduced. [0027]

[Brief description of the drawings] FIG. 1 is a configuration diagram illustrating an embodiment of the present invention. FIG. 2 is a plan view of the same. FIG. 3 is an operation explanatory view of the same. FIG. 4 is an operation explanatory view of the same. FIG. 5 is an explanatory diagram of a conventional technique. FIG. 6 is a plan view of the main part. FIG. 7 is an explanatory diagram of a conventional technique. [Explanation of symbols] 30 Handrail 32 deck 33 Lock Ring 34 Lock lever 35 hooks 38 Lock lever shaft 40 Lock lever spring 43 Latch mechanism 44 Latch lever 45 Latch lever axis 46 Latch lever spring 47 pins 48 Stopper

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-99084 (JP, U) JP-A-2-115870 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) E04F 11/18 B63B 17/04 E05B 65/00 E05B 65/12 E05C 3/14 E05C 19/06

Claims (1)

(1) In a locking device for a handrail, a locking ring is provided to project sideways on the handrail pivoting around a base end, and the handrail is provided. A lock lever having a hook for locking the lock ring at the upright position of the lock lever, and a spring for urging the lock lever around the fulcrum in the hook locking direction,
A latch means is provided for holding the lock lever against the spring hook unlocked position, locking the latch means
Same as the lock lever with the base end as a fulcrum adjacent to the side of the lever
Latch lever that can rotate in the same direction
Around the point opposite to the biasing direction of the lock lever spring
Spring and the latch lever to the spring
A pin that catches against and follows the rotation of the lock lever
And the latch lever at the unlocked position of the lock lever hook.
A locking device for a flip-up handrail, comprising a stopper portion for suppressing sliding with a pin .