CN2240206Y

CN2240206Y - Frame-type double-hook wire stretcher

Info

Publication number: CN2240206Y
Application number: CN 94247995
Authority: CN
Inventors: 丁海澎
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-12-13
Filing date: 1994-12-13
Publication date: 1996-11-13
Anticipated expiration: 2004-12-13

Abstract

The utility model relates to a double-hook wire stretcher which can fast tighten workpieces of a flexible cable class, and changes the operation that the workpieces are tightened caused by the opposite displacement of double hooks by singly wrenching a sleeve barrel to rotate into two steps that a link mechanism, both ends of which are screwed with large thread pitch double hooks, rotates instead of the sleeve barrel, wherein, the link mechanism is hinged into a frame type. When wires are stretched in advance, the speed is accelerated because of the large thread pitch of the double hooks; after the wires are stretched in advance, a handle wrenched in the tightening direction drives a small thread pitch supporting rod to rotate through a ratchet wheel so as to support the frame and shorten the distance between the double hooks. Finally, the wire stretching process is completed in a labor saving way, and the defects of unable stretching wires caused in the way that the workpieces and the double hooks synchronously rotate following the handle. The utility model is particularly suitable for use in high altitude construction.

Description

Frame double hook wire grip

The utility model relates to a kind of instrument of straining the flexible rope kind workpiece, is suitable for tension cable usefulness in electric power, the telecommunication connection construction especially.

Wire grip of the prior art generally adopts the screw rod of the opposite buckle of two hand of spiral, couples together with the sleeve that has left and right sides spin nut, and the middle ratchet spanner that adopts makes the sleeve rotation, thereby makes two screw rods move the purpose that reaches the gentle rope of tension in opposite directions.Such wire grip is big because of tightening force, and is easy to operate and be widely used.But, such apparatus in use has two problems not solve: one, speed and labour-saving contradiction, and the pitch on the wire grip is fixed, but a tight order in loose earlier back is arranged in the gentle rope tension process in the use, so it is big inadequately pitch to have occurred loose the time, causes speed unhappy; Pitch is inadequately little again in the time of tight, causes effort, and you can't have both at the same time.Two, because the ratchet spanner operative orientation is to rotate around double hook axis (also being around gentle rope axis).And on this direction, the sleeve that spanner, spanner drive by ratchet, and the degree of freedom of the double hook under screw thread frictional force drives and the double hook oriented same direction motion of gentle Suo Jun under driving.Can do not revolve so screw thread occurred, gentle rope tight not contradiction.Must the workman catch double hook or gentle Suo Yifang spline to move when pulling spanner, this be bigger concerning difficulty the workman of high-altitude application, the time-consuming effort again of result.

The purpose of this utility model provides a kind of improved wire grip, and it can not only improve stringing, and speed is simultaneously more laborsaving again, thereby further improves work efficiency.

The utility model is achieved through the following technical solutions, and it utilizes the big characteristics of screw mechanism force increasing ratio, and as main actuator, the two cover screw mechanisms that adopt big fine pitch not wait are served as the task of pretension and further tension respectively with it; And carry out force resolution and change direction firmly with the link rod frame of parallelogram, reach the laborsaving purpose that saves time.

Description of drawings is as follows:

Fig. 1 is the structure chart of frame double hook wire grip.

Fig. 2 is the structural scheme of mechanism after action is finished.

Existing accompanying drawings is as follows:

As shown in Figure 1, two bigger double hooks (1) of spiral phase reverse pitch screw in respectively in the hitch (2) at framework two.Use connecting rod (3) hinged and form the link rod frame of a parallelogram in the middle of hitch (2) and two between the hitch (5) respectively.Be rotary with a strut (6) that two ends screw thread phase reverse pitch is less in the screw of hitch in the middle of two.Ratchet (4) is equipped with in the centre of strut (6), and spanner (7) is enclosed within on strut (6) and the ratchet (4), and a bilaterally adjustable ratchet is arranged on it.

The utility model is to implement like this: the double hook at two ends is hooked respectively treat tight gentle Suo Yihou, along (A) direction rotating frame, pitch on the double hook satisfy be chosen as under the condition of self-locking maximum to accelerate pretension speed, because the hand of spiral of two double hooks is opposite, so wire grip is with the mobile in opposite directions rope pretension that will soften very soon of the speed of double pitch.After the feel effort, pull handle (7) along (B) direction, drive strut (6) rotation by ratchet (4), hitch was reverse in the middle of rotation made two when utilizing opposite threads struts as Fig. 2, because the pitch on the strut is much smaller more than the pitch on the double hook, so more laborsaving; Simultaneously by mechanics principle as can be known in this linkage the axial thrust of strut more much bigger than the pulling force of two double hook directions.Therefore the gentle rope that available less power will be tightened to a certain degree in advance further is tightened to desired value.Owing at the spanner of the later stage of tension use with the rope axially parallel direction work that softens, overcome gentle rope again, double hook makes limited active force fully obtain utilizing with the problem of the coaxial rotation of spanner.

The utility model is owing to adopt the double hook pretension of coarse pitch and the further two cover operating mechanisms that strain of strut of fine pitch; Use the reinforcement principle of linkage again, thereby, reach time saving and energy saving purpose in many ways in conjunction with having solved speed and the laborsaving contradiction that can not have concurrently.This instrument is suitable in the construction of electric power, telecommunication connection the usefulness as the stringing instrument of wirerope, cable especially, and this tool construction tube is single, easy to manufacture, it is light and handy, easy to utilize to use.

Claims

1, a kind of frame double hook wire grip is characterized in that: be rotary with double hook at the stirrup link mechanism two ends that become with rod hinge connection by link span, middle link span, double hook connects with the flexible rope kind workpiece; Framework changes shape and drives double hook change distance under the effect of strut.

2, double hook wire grip according to claim 1 is characterized in that: the partner opposite screw pair of rotation direction of coarse pitch of the double hook at framework two ends and link span; The handle of pulling along the stringing direction drives strut work by ratchet, the partner opposite screw pair of rotation direction of fine pitch of strut two ends and middle link span.