CN201110004Y

CN201110004Y - Wire coil brake for reinforcing steel strapping machine

Info

Publication number: CN201110004Y
Application number: CNU2007200591488U
Authority: CN
Inventors: 许才信
Original assignee: Shengzhen Baoan District Xixiang Village Guanrong Electronic Factory
Current assignee: Shengzhen Baoan District Xixiang Village Guanrong Electronic Factory
Priority date: 2007-10-30
Filing date: 2007-10-30
Publication date: 2008-09-03
Anticipated expiration: 2017-10-30

Abstract

The utility model provides a steel bar binding machine, such as a steel bar binding machine which uses metal wires to crossly bind steel bars which are horizontally and vertically arranged on the building site field, in particular to a wire coil brake of the steel bar binding machine, which comprises a lock hook, a lock hook traction device and a lock hook return device which are arranged on the outer side of the radial direction of the flange of a wire coil in a wire coil bin, the differences are that the lock hook traction device comprises a torsion spring and a traction device, wherein the torsion spring is arranged on a lock hook shaft, the traction device is connected with a segment of the torsion spring, and the lock hook return device comprises a return spring which is arranged on the lock hook shaft. Because using a spring cushioned braking device, the braking process of the whole wire coil is in a cushion state and has no noise, the structure is simple, the work is reliable, and simultaneously, because the friction coefficient of the whole structure is small, the usage frequency of the wire coil is prolonged.

Description

A kind of drum brake that is used for reinforcing-bar binding machine

Technical field

The utility model relates to a kind of reinforcing-bar binding machine, for example the reinforcing bar that will arrange in length and breadth at the scene, building site with wire intersects the reinforcing-bar binding machine of tying up, be particularly related to a kind of reinforcing-bar binding machine drum brake, can effectively brake, prevent that drum from because of the rotation of inertia reason, causing wire to overflow and coiling phenomenon.

Technical background

In construction work, the reinforcing bar intersection that usually needs to arrange is in length and breadth tied up.Reinforcing-bar binding machine can be described as one on the architectural history and invents greatly, and it has replaced traditional manually tying up, and has alleviated working strength of workers greatly, has improved operating efficiency and bundling quality.

Now common reinforcing-bar binding machine includes main body 1 as shown in Figure 3 on the market, is provided with the ring forming portion of opening at the head of main body, the reinforcing bar 7 that intersects can be placed in one during use; Wire drum 2 can be installed in rear portion in main body.The wire 3 of pulling out from drum is fed to the front portion of this reinforcing-bar binding machine by wire feeder 5, is wrapped on the reinforcing bar of intending tying up 7 along guiding device 6 bendings with arc extension slot.After wire put in place, wire feeder 5 stopped to continue to feed; Structure 8 and the clamping device 4 of tightening in the strapper starts and protracts, and promotes cutting structure and cuts off with being about to wire 3 afterbodys; Clamping device is clamped wire 3 and is rotated, thereby finishes tying up reinforcing bar 7 until tightening wire 3.Whole binding reinforcing bars EP (end of program).

When a process of tying up began, the wire feeder should stop to feed immediately, and the wire drum also should be braked immediately, in order to avoid because of the inertia reason continues rotation, cause wire to overflow.In the existing like product, the common more complicated of the arrestment mechanism of wire drum, not only noise is big during use, and poor reliability, has influenced machine performance greatly.

Summary of the invention

At above-mentioned the deficiencies in the prior art, the utility model provides a kind of novel reinforcing-bar binding machine drum brake, and simple in structure, noise is little, and braking is reliable.

For realizing above-mentioned technical purpose, this utility model adopts following technical scheme, a kind of drum brake that is used for reinforcing-bar binding machine, comprise the latch hook, latch hook draw-gear, the latch hook returning device that are installed in drum flange radial outside in the drum storehouse, its difference is, described latch hook draw-gear device is by being installed in the torsion spring on the lock hook shaft and forming with one section haulage gear that links of torsion spring, and described latch hook returning device is made up of the return spring that is installed on the lock hook shaft.

The utlity model has following characteristics: 1, because this brake adopts spring buffer formula check mechanism, the braking procedure of whole drum all is in buffer status, noiseless; 2, simple in structure, reliable operation; 3, the total friction factor is little, has prolonged the repeated use number of times of drum.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the utility model.

Fig. 2 is that A-A analyses and observe (part) figure among Fig. 1.

Fig. 3 is the schematic diagram of existing reinforcing-bar binding machine.

The specific embodiment

The utility model will be further described below in conjunction with accompanying drawing.

As shown in Figure 1, drum brake of the present utility model, comprise a latch hook 20, this latch hook is installed in the drum storehouse 11 of drum reinforcing-bar binding machine 1 by latch hook rotating shaft 21, its front end gib head is relative with the radial outside of the flange of drum 30, when latch hook 20 front end gib heads advance, will be stuck on the flange of drum 30, stop drum 30 to rotate.Latch hook 20 is given up the throne during normality, drum 30 can freely rotate, be with torsion spring 23 on the lock hook shaft 21, torsion spring one end 231 is stuck on the latch hook 20, the other end is a traction end 232, link with the torsion spring haulage gear 24 (not marking among the figure) that is installed in the strapper casing 12, on the casing 12 of reinforcing-bar binding machine, have an arc open-work 121.A return spring 22 is contained in the latch hook rotating shaft 21 at latch hook 20 backs.

As shown in Figure 2, torsion spring haulage gear 24 comprises a slide plate 241, and a side has two

platforms

2411,2412 along the direction of motion on the slide plate, and is middle with circular arc 2413 (flange) transition.The nose is by cutting a slurcam link (not marking on the figure) on the inner twisting arbor of trace 242 and reinforcing-bar binding machine.

Described torsion spring 23 is formed latch hook draw-gear 40 with torsion spring haulage gear 24.

Described return spring 22 constitutes latch hook returning device 50.

The utility model is in normality, and the traction end 232 of torsion spring 23 is shelved on slide plate 241 lower platform 2411 near the circular arc places, additional external force not on the whole torsion spring 23.The return spring 22 at latch hook 20 backs is stressed, makes latch hook 20 front ends break away from drum 30 flanges, can make drum 30 keep no frictional rotation.

When the silk device that advances of strapper pauses, when drum 30 needs braking, the twisting device of strapper also will move.Twisting this moment arbor protracts under the drive of motor, a slurcam is cut in drive, then draw before by trace 242 slide plate 241, torsion spring traction end 232 is subjected to the extruding of slide plate flange 2413, will be along 121 rotations of arc open-work, the other end 231 will transmit torsion to latch hook 20, and latch hook 20 front ends are lifted, be stuck on the flange of drum 30, realize braking drum 30.When torsion spring traction end 232 rose to the higher platform 2412 of slide plate 241, slide plate 241 can continue to move ahead.

When drum 30 no longer needs to brake, when promptly braking needs to discharge, the twisting arbor will rotate under the drive of motor, a slurcam is cut in drive, then by trace 242 slide plate 241 is retreated, torsion spring traction end 232 relative slide plates, to move on the lower platform 2411 through slide plate flange 2413 from slide plate 241 higher platforms 2412, its suffered external force will reduce gradually until making zero, and along arc open-work 121 spinning reductions, return to normal, and latch hook 20 also will reset under the effect of return spring 22.

In order to keep the gentle movement of slide plate, be installed on supporting plate 243 in the slide plate bottom, opposite side is installed on pressing plate 244.

Resistance when reducing the action of torsion spring traction end can add a sliding sleeve 28 at its traction end.

More than be preferred forms of the present utility model, according to the disclosed content of the utility model, some identical, replacement schemes that those of ordinary skill in the art can expect apparently all should fall into protection domain of the present utility model.

Claims

1. drum brake that is used for reinforcing-bar binding machine, comprise the latch hook (20), latch hook draw-gear (40), the latch hook returning device (50) that are installed in drum flange radial outside in the drum storehouse, its difference is, described latch hook draw-gear (40) is made up of the haulage gear (24) that torsion spring (23) reaches and described torsion spring one end (232) links that is installed on the lock hook shaft (21), and described latch hook returning device (50) is made up of the return spring (221) that is installed on the lock hook shaft (21).

2. the drum brake that is used for reinforcing-bar binding machine according to claim 1, it is characterized in that, described torsion spring haulage gear (24), comprise a slide plate (241), described slide plate one side has the platform (2411,2412) of two centres with circular arc 2413 (flange) transition along the direction of motion, the arc open-work (142) that described torsion spring one end (232) passes on the strapper casing (12) is shelved on the lower platform (2411) of described slide plate (241), and the other end is shelved on the described latch hook (20).

3. the drum brake that is used for reinforcing-bar binding machine according to claim 1 and 2 is characterized in that described torsion spring one end (232) adds a sliding sleeve (28).