JPH1120700A - Joint for blocking rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint for a refraction type blocking rod of a circuit breaker which is excellent in refraction and has a high protection effect of a blocking rod, and on the other hand, natural refraction is unlikely to occur. SOLUTION: A first sleeve 2 attached to a support rod A includes:
A rounded spherical receptacle 9 with a rounded edge is provided on the periphery, and a projection 10 fitted into the second sleeve 3 attached to the tilting rod B so as to fit the receptacle 9 and an annular support seat 11 corresponding to the peripheral edge 9a of the receptacle are provided. The first sleeve 2 and the second sleeve 3
A rubber member 6 in which the ring 4 and the bolt 5 are integrated.
It was made to draw and connect with.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint used for a blocking rod of a circuit breaker installed at a railroad crossing or the like.

[0002]

2. Description of the Related Art The circuit breaker described above generally has a structure in which one turning rod is attached to a swing arm. However,
In the circuit breaker of this structure, when the car tries to forcibly pass, the breaker rod may be pushed and bent and break. A bamboo rod or a hollow tube made of FRP is used as the blocking rod, but the bending of the rod alone cannot cope with excessive pressing bending.

[0003] For this reason, a refraction-type shut-off rod having a joint at a root portion or an intermediate portion has been proposed in Japanese Patent Application Laid-Open No. 4-292260.

[0004]

In the joint (intermediate refraction machine) disclosed in the above publication, a taper-shaped projection is provided on a connector attached to a tilting rod (a portion where a blocking rod is bent) to support the projection. The sleeve is loosely fitted in the receiving hole of the sleeve connected to the rod (the base side of the circuit breaker), and this projection is drawn into the receiving hole with a screw rod biased by a spring. When it rotates about the contact portion between the opening edge and the projection as a fulcrum, it hits the end face of the sleeve. further,
It is also possible that the tip side of the projection hits the inner surface of the receiving hole,
Smooth refraction is hindered.

In this joint, a receiving member having a semicircular round groove is attached to the tip of the supporting rod to prevent spontaneous refraction of the tilting rod, and the receiving member receives the base of the tilting rod from below. However, the presence of this receiving member hinders refraction in the lateral direction.

[0006] The blocking rod is pushed sideways when the car is forced through, and is simultaneously flipped up. Therefore, above,
Although it is preferable to be able to bend easily in both directions, it is difficult for conventional joints to meet the demand.

Further, when the blocking rod is bent, there is actually a problem that the end of the receiving member having the edge protrudes forward of the bending point and damages the vehicle.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the refraction of a blocking rod joint and prevent natural refraction without a receiving member.

[0009]

In order to solve the above-mentioned problems, a joint according to the present invention is provided with a first sleeve having a circular receiving surface having an arcuate surface at a tip end and a rounded periphery of the receiving surface, A second sleeve provided at a rear portion with a projection which fits into the first sleeve and an annular support seat connected to the root of the projection, a ring to be locked in the second sleeve, and a first sleeve inserted into the first sleeve. A bolt which is screwed to the nut held by the above, and a flexibly elastic member which connects the ring to the ring, and the first sleeve attached to the support rod and the second sleeve attached to the tilting rod are pulled by the elastic member. In this case, a refractible connection was adopted.

In this joint, a mover is inserted into the second sleeve instead of the ring, the mover and the bolt are connected by a flexible connecting member, and the mover is separated from the first sleeve by a spring. May be configured to be biased.

[0011]

In the joint of the present invention, the second sleeve is pulled toward the first sleeve by the force of the spring, and the projection of the second sleeve is fitted and pressed against the receptacle of the first sleeve. The mating is
In the case of the joint disclosed in Japanese Patent Application Laid-Open No. 4-292260, the projection and the sleeve are in linear contact, whereas the joint of the present invention is in a shape of fitting the projection into the socket so that the joint comes into surface contact and the supporting force is reduced. It is large and does not bend under its own weight or slight impact.

Further, the peripheral edge of the rounded receptacle of the first sleeve is received on the support seat of the second sleeve, and the second sleeve is rotated with the periphery thereof as a fulcrum, so that the rotation resistance of the second sleeve is small. In addition, at this time, the protrusion of the second sleeve comes off the receptacle while being in contact with the inside in the refraction direction, and the elastic member and the connecting member freely bend and follow the movement of the second sleeve. Therefore, the rotation of the second sleeve is performed without any trouble, and the refraction is improved.

Further, since both the peripheral edge of the support seat and the peripheral edge of the receiving port received in the seat are annular, a pivot point can be formed anywhere in the circumferential direction, and the support is easily bent in the direction in which the force is received.

Further, since the projection is in contact with the periphery of the receptacle inside the refraction direction and the projection is used as a fulcrum to securely return into the receptacle, excellent resilience is obtained.

[0015]

1 and 2 show an embodiment of a joint according to the present invention. The joint 1 includes a first sleeve 2 attached to the tip of the support rod A, a second sleeve 3 attached to the rear end of the tilting rod B, a ring 4 to be locked inside the second sleeve 3, and a A bolt 5 inserted into one sleeve 2, a rubber member 6 connecting the ring 4 to the bolt 5, a washer 7 applied to the rear surface of the first sleeve 2, and a nut 8 screwed to the bolt 5 and held by the washer 7. Consisting of The nut 8 may be directly retained by the first sleeve 2 without the washer as shown in FIG.

At the end of the first sleeve 2, there is provided a spherical circular receptacle 9 concentric with the sleeve axis. The peripheral edge 9a of the receptacle 9 has a roundness of a substantially semicircle.

A receiving port 9 is provided at the rear of the second sleeve 3.
And a ring-shaped support seat 11 formed at the base of the protrusion and opposed to the peripheral edge 9a of the receptacle 9 is provided. The first and second sleeves 2, 3
Is preferably made of aluminum, an aluminum alloy, a resin, or the like in terms of weight reduction, but of course, it can be formed of other materials.

As the ring 4, an iron ring is used here, but a metal ring other than iron or a non-metal ring can be used.

The bolt 5 is a bolt with a head 5a. The rubber member 6 can be selected from natural rubber, synthetic rubber, or a rubber blended with both, and is preferably used. In particular, chloroprene rubber is preferable.

The ring 4, the bolt 5, and the rubber member 6 are integrally molded. The rubber member 6 can be connected to the head 5a or ring 7 by a method such as forming a hole or groove in the bolt head 5a or ring 7 and filling a part of the rubber into the hole or groove. It is preferable in terms of peeling resistance rather than sulfur bonding.

As shown in FIG. 2, the joint 1 has its peripheral edge 9a in contact with the projection 10 and the support seat 11, and the second sleeve 3 pivotally refracts while extending the rubber member 6 with the contact point as a fulcrum. I do. Then, the protrusion 10 which is pulled back by the elasticity of the rubber member 6 and is detached from the receiving port 9 is fitted to the receiving port 9 again with the contact point as a fulcrum, and is restored to the extended state.
Note that the rubber member 6 may be replaced with a tension spring.

FIG. 3 shows another embodiment. This joint 2
1 is a receiving port 9 provided in the first sleeve 2 being a receiving port of an annular convex curved surface sharing the curved surface of the peripheral edge 9a.
The mover 12 is inserted into the second sleeve 3 and the mover 1
2 and the bolt 5 are connected by a flexible connecting member 13 (preferably a metal wire or a chain), the movable element 12 is urged by a coil spring 14 and the second sleeve is urged by the reaction force of the spring 14. 3, which is different from the joint of FIG.

This joint 21 is, as shown in FIG.
When the sleeve 3 rotates, the coil spring 14 is compressed and is restored by the force of the spring. Therefore, this joint 21
As for the refraction and the restoration, the effect which is not much different from the joint of FIG. 1 can be obtained. In addition, since the connecting member 13 is used for connecting the first sleeve 2 and the second sleeve 3, a joint that is strong against an external load can be obtained.

Although the joint 21 shown in FIG. 3 is simpler than the conventional product, the joint 1 shown in FIG. 1 using a rubber member has a simpler structure, and is easy to reduce the cost, reduce the size, and reduce the weight. .

FIG. 5 shows an example of the use of the exemplary joint. The blocking rod is divided into a supporting rod A attached to the turning arm C of the circuit breaker and a tilting rod B added to the tip of the supporting rod, and these rods A and B are shown in FIG. 1 or FIG. They are connected via joints 1 and 21. In this way, when pushed by a vehicle or the like, the tilting rod B is bent and the impact is reduced.

[0026]

As described above, the joint of the present invention
The protrusion of the second sleeve is disengaged from the receptacle of the first sleeve during the bending, and the contact point between the base of the projection and the periphery of the rounded receptacle serves as a fulcrum, so that the second sleeve is rotated. It also bends smoothly in the direction and restores smoothly, increasing the protection effect of the blocking rod and the reliability of return.

In addition to the fact that the projection and the receiving opening are in surface contact with each other, a centripetal force acts on the fitting portion of the projection and the receiving opening, so that spontaneous refraction is unlikely to occur, and the receiving member is omitted and the vehicle is not damaged by the receiving member. be able to. In addition, the joint using the rubber member has a particularly simple structure, and can be reduced in size, weight, and cost. Further, the joint using the mover and the coil spring can obtain a joint that is strong against an external load.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a joint according to the present invention.

FIG. 2 is a sectional view showing a bending form of the joint according to the first embodiment;

FIG. 3 is a cross-sectional view of another embodiment.

FIG. 4 is a sectional view showing a refracted state of the joint.

FIG. 5 shows an example of the use of the joints of FIGS. 1 and 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 21 Joint 2 1st sleeve 3 2nd sleeve 4 Ring 5 Bolt 6 Rubber member 8 Nut 9 Receptacle 9a Rounded periphery 10 Projection 11 Support seat 12 Mover 13 Connecting member 14 Coil spring

Claims (3)

[Claims] 1. A first sleeve having a circular receptacle at an end portion having an arcuate surface and a rounded periphery of the receptacle, a projection fitted to the receptacle and an annular support seat connected to the base of the projection. A second sleeve provided at a rear portion, a ring to be locked in the second sleeve, a bolt inserted into the first sleeve and screwed to a nut retained by the first sleeve, and connecting the bolt and the ring An interrupting rod joint comprising a first sleeve attached to the support rod and a second sleeve attached to the tilting rod, which are connected by the elastic member so as to be able to bend and bend, comprising an elastic member which can be bent and stretched. 2. The joint according to claim 1, wherein said elastic member is made of rubber or a tension spring. 3. A first sleeve provided with a circular socket having an arcuate surface at a distal end portion, a first sleeve having a rounded periphery at the socket, a projection fitted to fit the socket, and an annular support seat connected to the base of the projection. A second sleeve provided at a rear portion, a movable element inserted into the second sleeve, a bolt inserted into the first sleeve and screwed to a nut held by the first sleeve, and one end of the movable element, A first sleeve attached to the support rod and a second sleeve attached to the tilting rod, comprising a flexible connecting member having the other end connected to the bolt, and a spring for urging the mover in a direction away from the first sleeve. And a resiliently connected joint for the blocking rod.