JPH0138148Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wire tension balance device.

A conventional wire tension balance device provided in a lamp cover of a ship will be explained based on FIGS. 1, 2, and 3.

A wheel 6 is attached to the side of the lamp cover 5, and a rail 7 for guiding the wheel 6 is installed at an angle on the ship. Two independent wires 9 extending in parallel from the winch drum 8
L and 9R are hung between the lamp cover 5 and the hull via a plurality of pulleys 10 to form a movable pulley. The lamp cover 5 is moved vertically in parallel via the two wires 9L and 9R wound by the rotation of the winch drum 8.

Each end 1 of the two wires 9L and 9R
1L and 11R are stoppers 1 fixed to the hull 1.
It is connected by a joint 13 through 2L and 12R.

The two stoppers 12L and 12R are fixed at a predetermined interval, and the left and right wires 9 are fixed at a predetermined interval, and the left and right wires 9 are fixed at a predetermined interval.
Variations in the lengths of L and 9R can be compensated for by moving the joint 13 between the stoppers 12L and 12R, thereby equalizing the tension acting on the left and right wires 9L and 9R.

Further, for example, when one wire 9L is cut, the joint 13 has a function of coming into contact with the stopper 12R and supporting the other wire 9R. Therefore, even if the wire 9L is cut, the cover 5 guided to the rail 7 can be held in the open position by the other wire 9R.

However, when cutting the wire, the impact force at the moment when the joint 13 abuts against the stopper 13R is very large, which causes problems in that the strength of the wire is reduced and the remaining wire is also cut.

The present invention was developed in view of the above-mentioned problems, and it is an object of the present invention to provide a wire tension balance device that can support the wire on one side without impacting the other wire when cutting the wire on the other side.

In this invention, both rod-type hydraulic cylinders are fixed to a support member using two independent wires that are routed in parallel to the towed object, and a restriction is provided in the passage connecting the left and right oil chambers of the hydraulic cylinders. The structure is such that the terminal ends of each of the wires are connected to both ends. This equalizes the tension of each wire and provides damping resistance to the piston when one wire is cut, supporting the remaining wire without impact.

Embodiments of the present invention will be described below based on the accompanying drawings. Components that are the same as those of the conventional example are given the same numbers.

As shown in FIG. 4, both rod-type hydraulic cylinders 15 are fixed to the hull 1, and each terminal end 11L of the wires 9L, 9R, which are wrapped around the lamp cover 5,
11R is connected to both ends 17L and 17R of the rod 16.

As shown in FIG. 5, the double rod type hydraulic cylinder 15 has a piston 18 fixed to the center of the rod 16, and the piston 18 is housed in the inner tube 19 so as to be freely movable, so that the left and right oil chambers A and B are connected. define.

In the inner tube 19, a plurality of small diameter ports 20, 21, 22, . . . (restrictions) are symmetrically bored in series in the axial direction. An outer tube 24 is arranged outside the inner tube 19 at a distance to define an outer chamber C. This outer chamber C and the above port 20,
21, 22..., the left and right oil chambers A and B communicate with each other.

Incidentally, threaded portions are formed on both ends 17L and 17R of the rod, respectively, so that wires 9L and 9R can be connected to each other via metal fittings (not shown). A mounting flange 2 is integrally attached to the outer tube 24.
5 so that it can be fixed to the hull 1 via bolts.

The variation in the length of the left and right wires 9L, 9R can be compensated for by moving the rod 16 left and right with respect to the inner tube 19.
The tension acting on R can be made equal.

At this time, the hydraulic oil flows through multiple ports 20, 21, 2.
2... and the outer chamber C, and moves between the left and right oil chambers A and B with almost no resistance.

Further, for example, if one wire 9R is cut, the rod 16 is pulled by the other wire 9L and moves to the left (FIG. 4). At this time, the piston 18 opens into the left oil chamber A through ports 22, 21, 2.
0 one after another and slides, the discharge passage area of the hydraulic oil decreases step by step, and the speed of the piston 18 attenuates accordingly. As a result, piston 1
8 can close the leftmost port 20 to soften the impact at the moment the oil is locked.

As described above, the present invention involves arranging two independent wires to be wound around a winch in parallel with each other via a pulley, and supporting a towed object in the middle of the wire via a pulley. The hydraulic cylinder was fixed to a support member, a restriction was provided in the passage connecting the left and right oil chambers defined by the piston of the hydraulic cylinder, and the terminal ends of the wires were connected to both ends of the rod of the hydraulic cylinder, respectively. When one side of the wire is cut, the movement of the piston is damped and the wire can be supported without impact, and the strength of the remaining wire is prevented from being significantly reduced. , it is possible to improve safety when opening and closing the lamp cover.

[Brief explanation of the drawing]

FIG. 1 is a side view of the conventional example, FIG. 2 is a plan view thereof, and FIG. 3 is a front view thereof. FIG. 4 is a front view showing an embodiment of the present invention, and FIG. 5 is a sectional view of the hydraulic cylinder. A...Left oil chamber, B...Right oil chamber, C...Outer chamber, 1
... Hull (supporting member), 5 ... Lamp cover, 9
L, 9R...Wire, 11L, 11R...Terminal end, 15...Hydraulic cylinder, 17L, 17R...
Rod end, 18... Piston, 19... Inner tube, 20, 21, 22... Port (restriction).

Claims (1)

[Scope of utility model registration request] Two independent wires that are wound around a winch are arranged parallel to each other via a pulley, and an object to be towed is supported in the middle of the wire via a pulley, while both rod-type hydraulic cylinders are fixed to a support member. The wire is characterized in that a restriction is provided in the passage connecting the left and right oil chambers defined by the piston of the hydraulic cylinder, and the terminal ends of the wires are respectively connected to both ends of the rod of the hydraulic cylinder. Tension balance device.