JPH0715815A - Three-wheel metal hanger - Google Patents

Abstract

PURPOSE:To improve the locking mechanism of a three-wheel metal hanger used in a cable stringing work. CONSTITUTION:A locking mechanism is formed out of a pair of right and left symmetrical locking units 15. Each locking unit 15 comprises a sandwiched reception body 18 provided near the hub of a wheel 2, a pine-needle pin 17 for sandwiching the sandwiched reception body 18 in between its pine-needles, a cam member placed in the intermediate position between the sandwiched reception body 18 and a pin supporting body 16, a lever fastening body 24 provided in the position separated from the cam member by a predetermined distance, and a locking lever 21 whose foundational end part is connected with the cam member. Also, when the end part of the locking lever 21 is fastened to the lever fastening body 24, the pine-needle pin 17 is closed, and a three-wheel metal hanging carriage is brought into a locking state, and when the locking lever is rotated to a predetermined angle, the pine-needle pin 17 is opened by virtue of the cam member, and the three-wheel metal hanger is brought into a lock releasing state. As a result, the moment of the force applied by a cable C to a frame member 5 can be reduced, and since the sure reference of the locking state is given, the locking function of the three-wheel metal hanger can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-wheel suspension wagon used for cable drawing work.

[0002]

2. Description of the Related Art As a conventional three-wheel hanging wheel, for example, one disclosed in Japanese Examined Patent Publication No. 61-32890 is known. This three wheel suspension wagon has three wheels, two
It has a structure in which one cable supporting wheel and one suspending wheel are arranged in a triangular shape and sandwiched by a pair of left and right frame members. Then, one of the frame members is configured to be pivotally opened / closed for cable insertion / removal, and a lock mechanism for this pivotal opening / closing is provided, and the frame member for opening / closing can be always locked by this lock mechanism. Is being done.

The lock mechanism is formed by using a pine needle pin, and a pin receiving member which is protruded to the side surface of the frame member between the cable supporting wheels is held by the pine needle pin to operate the operation knob. By doing so, the lock can be released by expanding the pine needle pin.

This three-wheel suspension wagon has many advantages such as its strong structure against the twisting of the cable due to "twisting" and a small holding angle, so that the passage resistance of the cable can be small. However, it already has many practical achievements.

However, one problem has been highlighted in the course of practical achievements. That is, when a force is applied to the frame member by a cable that obliquely enters, the frame member is likely to be in a state in which the frame member may be arbitrarily opened. So when I tried to find the cause,
It turned out that the locking mechanism was insufficient.

Specifically, since the lock mechanism only fixes the frame member for opening and closing at the intermediate position between the two cable supporting wheels, the point of action of the force applied to the frame member by the cable is fixed by the lock mechanism. It becomes far from the point, and as a result, the force applied to the frame member works as a force to open the frame member with a larger moment, and the operation knob for expanding and contracting the pine needle pin is operated halfway when locked. It has been found that this is caused by the fact that the pine needle pin is likely to come off from the sandwich receiving body with a slight shock in such a case that it is not always brought into a predetermined state.

[0007]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a three-wheel suspension wagon having a lock mechanism capable of exerting a more stable fixing force.

[0008]

A three-wheel sling according to the present invention holds two cable-supporting wheels and one suspending wheel in a triangular array, and holds each wheel in a sandwiched state. Both first and second frame members, first
An auxiliary frame member for connecting the shafts of both cable supporting wheels to each other on the back side of the frame member, and a lock mechanism for connecting the first frame member and the auxiliary frame member are provided. The frame member is designed so that it can be opened and closed with the hinge connection portion on the suspension wheel side as a fulcrum, and its lock mechanism is
The lock unit is composed of a pair of left and right lock units symmetrically formed with each other, and the lock unit is fixedly connected to the auxiliary frame member, and the tip portion of the lock unit forms the first frame member on or near the axis of the cable supporting wheel. The base portion is supported by the pinching support body that is configured to penetrate, and the pin support body that is provided on the side surface of the first frame member at a position apart from the pinching support body by a predetermined distance The pine needle pin and the pin receiving member and the pin support member are rotatably provided on the side surface of the first frame member at an intermediate position, and the pine needle pin is expanded in the first rotating state and in the second rotating state. A cam member designed to release the expansion of the pine needle pin,
A lever locking body provided on the side surface of the first frame member at a position separated by a predetermined distance from the cam member to the opposite side of the sandwich receiving body, and a base end portion is connected to the cam member and a tip end portion is lever locked. It is composed of a lock lever that can be locked to the body, and the cam member is in the second rotation state when the tip of the lock lever is locked to the lever locking body to lock the lever locking body. The cam member is brought into the first rotation state by rotating the released lock lever to a predetermined angle.

[0009]

In this way, the lock mechanism is formed by a pair of left and right lock units, and the sandwiching receiving body of each lock unit is provided on or near the axis of the cable supporting wheel, that is, near the end of the first frame member. As a result, the fixing point of the lock mechanism becomes closer to the point of action of the force applied to the frame member by the cable, and the moment of the force for opening the frame member can be reduced.

Further, since the cam member for expanding / contracting the pine needle pin is operated by the lock lever and the lock lever is locked to the lever locking body when locked, the pine needle pin expanded / released state, In other words, the locked state can be set with a reliable reference, and a halfway locked state can be prevented.

[0011]

EXAMPLES Examples of the present invention will be described below. As shown in FIGS. 1 and 2, the three-wheel sling 1 according to this embodiment has two
It is equipped with one cable support wheel 2, 2 and one suspension wheel 3, and these three wheels 2, 2, 3
Are assembled in a frame body in a triangular array.

The frame body is composed of a pair of left and right first and second frame members 5, 6, an auxiliary frame member 7, a lower connecting member 8 and an upper connecting member 9. The second frame member 6 is composed of three members. Each wheel 2, 2, 3 axis 2
s, 2s, 3s is fixedly held at one end, and the auxiliary frame member 7 fixedly holds the other ends of the shafts 2s, 2s of the two cable supporting wheels 2, 2 respectively. And the auxiliary frame member 7 are integrally connected by a lower connecting member 8.

The first frame member 5 is for opening and closing for putting in and out the cable C, and the fixing portion 11 integrally connected to the upper end of the second frame member 6 via the upper connecting member 9 and the fixing portion 11. To the auxiliary frame member 7 by a lock mechanism.
When the lock mechanism is in the released state, it can be rotated and opened as indicated by an arrow X in FIG.

The lock mechanism is composed of a pair of left and right lock units 15 and 15 which are formed symmetrically to each other. The lock unit 15 has a lower side of the first frame member 5 as shown in detail in FIG. A pin support member 16 for supporting the pine needle pin is provided so as to protrude toward the center of the part.
The pinching support body 18 is pinched by the tip end of the pine needle pin 17 whose base end is supported by the pin, so that the pin is locked. The holding member 18 is formed by processing the tip of the shaft 2s of the cable supporting wheel 2 into a required shape.

Expansion and contraction of the pine needle pin 17 is performed by rotating the cam member 20 with the lock lever 21 as shown in FIGS. That is, the cam member 20 has a cam portion 20c and a spacer portion 20 each having a shape having an arc-shaped expansion surface 20a and a flat expansion release surface 20b.
s is formed integrally with the fulcrum shaft 20j, and is connected to the base end portion of the lock lever 21 via the fulcrum shaft 20j. The lock lever 21 is rotatably supported by the fulcrum shaft 20j in a bearing hole 23 formed in the side surface of the first frame member 5 at an intermediate position between the holding body 18 and the pin support body 16 and is indicated by an arrow Y. As described above, the cam member 20 is rotated in association with this rotation. A lever locking body 24 is provided so as to project near the center of the lower side of the first frame member 5, and the lever locking body 24 is provided.
The tip of the lock lever 21 can be locked. The reference numeral 26 in the figure denotes a spacer for adjusting the gap.

The locked state of each lock unit 15 is achieved by locking the lock lever 21 to the lever locking body 24. That is, when the lock lever 21 is locked to the lever locking body 24, the cam member 20 is in the second rotation state and the expansion releasing surface 20b of the cam portion 20c becomes parallel to the pine needle pin 17. At the same time, the pine needle pin 17 closes to clamp the clamp receiver 18,
It will be locked. In this way, locking the lock lever 21 to the lever locking body 24 is a condition of the locked state, so that the reference of the locking operation becomes clear and the clear visual confirmation can be performed, and the locked state can be confirmed. The certainty can be maintained. On the other hand, for unlocking, the lock lever 21 is rotated to bring the cam member 20 into the first rotation state,
At this time, the pine needle pin 17 is pushed and spread by the spreading surface 20a of the cam portion 20c that is pressed against it.

[0017]

As described above, in the three-wheel sling according to the present invention, the lock mechanism is formed by a pair of left and right lock units, and the fixing point in each lock unit is the point of action of the force applied to the frame member by the cable. Since it is provided close to the cable, the resistance against the force applied to the frame member by the cable is improved, and the lock lever is designed to clarify the standard of the lock operation so that a reliable locked state can be obtained. It is highly safe.

[Brief description of drawings]

FIG. 1 is a side view of a three-wheel sling according to an embodiment of the present invention.

FIG. 2 is a side view including a partial cross section as viewed from the direction of the arrow A _{2 in} FIG.

FIG. 3 is a sectional view taken along the line SA ₃ -SA ₃ shown in FIG.

FIG. 4 is a side view of a cam member.

FIG. 5 is a plan view of a cam member.

[Explanation of symbols]

 1 3 Wheel Suspension Wheel 2 Cable Support Wheel 3 Suspension Wheel 5 1st Frame Member 6 2nd Frame Member 7 Auxiliary Frame Member 12 Hinge Connection Part 15 Lock Unit 16 Pin Support 17 Matsuba Pin 18 Clamping Receiver 20 Cam Member 21 Lock lever 24 Lever locking body

Claims (2)

[Claims] 1. Two cable support wheels and one suspension wheel in a triangular arrangement, first and second frame members for holding each wheel in a sandwiched state, and a first frame. An auxiliary frame member connecting the shafts of both cable supporting wheels to each other on the back side of the member;
A lock mechanism for connecting the frame member and the auxiliary frame member is provided, and the lock mechanism releases the first mechanism.
In a three-wheel suspension wagon in which a frame member is capable of rotating and opening / closing with a hinge connection portion on the suspension wheel side as a fulcrum, the lock mechanism includes a pair of left and right lock units symmetrically formed with each other. The lock unit is fixedly connected to the auxiliary frame member and has a tip end portion that penetrates the first frame member on or near the axis of the cable supporting wheel, and a predetermined amount from the holding body. A pine needle pin having a base end portion supported by a pin support body provided on a side surface of the first frame member at a position spaced apart from each other and holding a holding support body at a distal end portion, and an intermediate position between the holding support body and the pin support body. A cam member that is rotatably provided on the side surface of the first frame member and that expands the pine needle pin in the first rotating state and releases the pine needle pin in the second rotating state. A lever locking body provided on a side surface of the first frame member at a position spaced a predetermined distance from the cam member to the opposite side of the holding body, and a base end portion of the cam member and a tip end portion of the lever engaging member. The lock member can be locked to the stopper, and the cam member is in the second rotation state in a state where the tip of the lock lever is locked to the lever locking body,
A three-wheel suspension wagon, wherein a cam member is brought into a first rotation state by rotating a lock lever that has been unlocked from a lever locking body to a predetermined angle. 2. The holding member according to claim 1, wherein the holding member is formed by using a tip portion of a shaft of a cable supporting wheel.
Wheel suspension wagon.