CN2127643Y

CN2127643Y - Bending and knotting machine for wire net rest

Info

Publication number: CN2127643Y
Application number: CN 92224392
Authority: CN
Inventors: 杨良桥
Original assignee: SHANGHAI COMMUNICATIONS LOAD A
Current assignee: SHANGHAI COMMUNICATIONS LOAD A
Priority date: 1992-06-08
Filing date: 1992-06-08
Publication date: 1993-03-03
Anticipated expiration: 2002-06-08

Abstract

The utility model discloses a tilting-plate type bending and knotting machine for wire net rest, which is used for manufacturing the steel-wire net rack of the backrest of the chair of a car. The utility model comprises a main machine seat, a knife plate, a multi-tooth push rod, an upward acting plate and a drive device driving the knife plate, the multi-teeth push rod and the upward acting plate act. Both side edges of the main machine seat are tooth-shaped grooves; two knife plates are provided with tooth-shaped rotating arms which can rotate with alpha angle in the tooth-shaped grooves to finish the first step bending action; tooth-shaped pushing blocks corresponding to each steel wire are arranged on the multi-tooth push rod in the main machine seat to be served to finish the second step knotting action, and thus the steel wire is bent and knotted on two plastic coated steel wire. The combined type machine of the utility model replaces the foreign complicated pipelining, reducing the production cost dramatically.

Description

Bending and knotting machine for wire net rest

The utility model relates to the equipment of making auto parts, relates more specifically to a kind of curved knot tying machine of turnover plate type steel wire net rack that is used for making motor vehicle seat back elastic wire rack.

The elastic wire rack that is adopted in the backrest of car front chair as shown in Figure 1, this rack by a center plastic tube 1, two thicker plastic coating steel wires 2 and many laterally penetrate center plastic tube 1 and its two ends respectively the thinner steel wire 3 of bending knotting on plastic coating steel wire 2 form.Wherein bending knotting step can be divided into for two steps shown in Fig. 2 a, 2b.The first step is the bending process, and promptly steel wire 3 ends inwardly turn over a α angle around plastic coating steel wire 2 (Fig. 2 a), the α angle is generally greater than 180 ° in transverse plane (plane vertical with plastic coating steel wire 2); Second step is for the knotting process, i.e. 90 ° of (along the direction of the plastic coating steel wire 2) bendings longitudinally of the end of the steel wire 3 of bending from the steel wire below, thus make whole steel wire net rack.

But up to now, domestic still do not have the equipment of making this steel wire net rack, external then adopt a very complicated streamline to make, complex manufacturing process and cost height.

Order of the present utility model provides the curved knot tying machine of a kind of better simply turnover plate type steel wire net rack, to replace the production line of external complexity, makes manufacturing process simple, reduces cost greatly.

For achieving the above object, the curved knot tying machine of turnover plate type steel wire net rack of the present utility model is by main engine bed, top board, two knife plates, two multiple tooth push rods and drive knife plate respectively, top board, the drive unit of multiple tooth push rod is formed, main engine bed longitudinally is provided with the locating slot of plastic tube and plastic coating steel wire, along the locating slot that laterally is provided with a plurality of placements knotting steel wire to be curved, vertical dual-side of described main engine bed is provided with a plurality of serrate slots facing each other, each serrate slot is aimed at the locating slot of knotting steel wire to be curved, and the position near above-mentioned both sides serrate slot on the main engine bed also has been formed separately two vertical chutes; Described knife plate distributes along the longitudinal and main engine bed serrate slot corresponding toothed pivoted arm, the dentation pivoted arm can be in corresponding serrate slot around one of the longitudinal axis upset of the inboard, arm end place that is positioned at its dentation pivoted arm α angle greater than 180 °; Described multiple tooth push rod is positioned at the chute of main engine bed and can longitudinally slidably reciprocates therein, and the whole length direction in its upper edge is distributed with and each serrate slot corresponding toothed pushing block, and its top surface is positioned at the below of steel wire; Described top board can be along the vertical main engine bed top of being arranged on up or down, which is provided with every steel wire is pressed on hold down gag on the main engine bed.

Under the driving of drive unit, knife plate rotates the α angle in transverse plane, thereby the top of its dentation pivoted arm forces the steel cord end in the main engine bed serrate slot to rotate the α angle around plastic coating steel wire, finished first step bending action, and multiple tooth push rod slides in chute, its dentation pushing block promotes the corresponding steel cord end of having finished the bending action and longitudinally bends 90 °, thereby finishes the knotting action.And can being pressed on steel wire on the main engine bed, top board prevents its two side shifting during carrying out above-mentioned two actions.This combined type machine construction is simple, but can produce qualified steel wire net rack.

For making feature of the present utility model, characteristics and advantage there are clearer understanding, a preferred embodiment are described in detail below in conjunction with accompanying drawing.

Fig. 1 is the schematic diagram of passenger car seat backrest steel wire net rack;

Fig. 2 a, 2b are for showing the schematic diagram of the bending in the rack manufacturing process and two steps of tiing a knot respectively;

Fig. 3 is a kind of curved knot tying machine of the present utility model plane schematic top plan view;

Fig. 4 is the schematic side view of curved knot tying machine shown in Figure 3;

Fig. 5 is for showing the decomposing schematic representation of curved knot tying machine and knife plate;

Fig. 6 is local amplification view, more to clearly illustrate some structures of curved knot tying machine;

Fig. 7 be along K among Fig. 5 to partial enlarged drawing, to show the effect of guide pad;

Fig. 8 is for showing the local amplification view of bending action;

Fig. 9 is for showing the local amplification plan view of knotting action.

Please referring to Fig. 3 and Fig. 4, the curved knot tying machine of turnover plate type steel wire net rack of the present utility model is by main engine bed 10, knife plate 20, multiple tooth push rod 30, top board 40 and be used for driving the drive unit that knife plate, multiple tooth push rod and top board etc. move separately respectively and form.

Referring to Fig. 5, longitudinally be provided with on the main engine bed 10 and be used for placing the locating slot 11 of center plastic tube 1 and the locating slot 12 of two plastic coating steel wires 2 respectively, along the locating slot 13 that laterally is provided with the steel wire 3 that is used for placing 15 knottings to be curved.

The dual-side of top board 10 respectively is 15 serrate slots of aiming at locating slot 13 14, and both sides knife plate 20 longitudinally also is formed with 15 and serrate slot 14 corresponding profile of tooth pivoted arms 21, and profile of tooth pivoted arm 21(is as shown in Figure 1) be fitted in the corresponding serrate slot 14.Knife plate 20 can rotate by the longitudinal axis around the inboard, arm end place that is positioned at its profile of tooth pivoted arm 21 in transverse plane, and the rotational angle of its profile of tooth pivoted arm 21 is α, this angle [alpha] also is that the steel wire first step (bending) is moved required angle bending, generally should be greater than 180 °, be 230 ° (referring to Fig. 8) in the present embodiment, be folded into the below so that will extend through the end of all steel wires 3 of two plastic coating steel wires 2.

Near the inboard of the locating slot 12 of the plastic coating steel wire 2 of both sides, also be formed separately two recessed chutes 15 that extend longitudinally on the main engine bed 10, multiple tooth push rod 30 can longitudinally slide therein (referring to Fig. 8, Fig. 9).Longitudinally be provided with 15 and each serrate slot 14 and profile of tooth pivoted arm 21 corresponding toothed pushing blocks 31 on the multiple tooth push rod 30, the top surface of multiple tooth push rod 30 and dentation pushing block 31 thereof is positioned at the below of steel wire 3.When multiple tooth push rod 30 slides in chute 15, the side of its dentation pushing block 31 just ejection steel wire 3 ends of having bent the α angle make it to finish second step longitudinally rolled over about 90 ° knotting action around steel wire 3.

Top board 40 is positioned at the top of main engine bed 10, and can move up and down (Fig. 4) under the driving of its drive unit along the vertical axis of guide 41.Referring to Fig. 6, the bottom of top board 40 is provided with elastic pressuring clamping device 42 corresponding to every steel wire 3, and for example elastomer block or spring etc. are pressed on steel wire 3 on the main engine bed 10 when the bending of carrying out steel wire 3 and knotting action, to prevent that steel wire 3 is to two side shiftings.

The both sides of top board 40 are provided with a guide pad 43(referring to Fig. 6,7 corresponding to the top of each serrate slot 11), it is shaped as a cuboid that cuts the oblique angle.The effect of guide pad 42 is that inwardly the end of the steel wire 3 of bending can slip over a low-angle β along its oblique angle in horizontal plane when carrying out 230 ° of bendings action, thereby prevents that its steel wire 3 with plastic coating steel wire 2 inboards is superimposed and hinder the carrying out that bending is moved.

Knife plate 20, multiple tooth push rod 30 and top board 40 all have drive unit separately, have all adopted fluid pressure drive device in the present embodiment.

Please see Figure 3, the drive unit of knife plate 20 is made up of hydraulic jack 25, connecting rod 26, tooth bar 27 and gear shaft 28, piston rod 29 in the oil cylinder 25 drives 26 motions of two connecting rods, connecting rod 26 so make tooth bar 27 along lateral symmetry move, rotate (axial location of gear shaft 28 is at the place, inboard of dentation pivoted arm 21) thereby drive, and then drive fixing knife plate 20 rotations of its two ends and gear shaft 28 with its meshed gears axle 28.

The drive unit of multiple tooth push rod 30 is made up of hydraulic jack 35 and piston rod 39 thereof, and piston rod 39 directly drives fixing with it multiple tooth push rod 30 and longitudinally slides in the chute of main engine bed 10.The drive unit of top board 40 (as shown in Figure 4) is made up of hydraulic jack 45 and piston rod 49 thereof, and piston rod 49 directly drives fixing with it top board 40 and moves up and down.

Also available other suitable drive mechanism of these fluid pressure drive devices replace, and because of not being the utility model essence place, and belong to conventional design, no longer enumerate here.

The making step of steel wire net rack is described below, and at first 15 steel wires 3 that pass center plastic tube 1 is placed in the corresponding locating slot of main engine bed 10, and is placed on two plastic coating steel wires 2 in its locating slot and is pressed on the steel wire 3; Second step, put down top board 40, its elastic pressuring clamping device 43 is pressed on steel wire 3 on the main engine bed 10; The 3rd step, knife plate 20 rotates the bending action (referring to Fig. 8) of carrying out α angle (230 °), knife plate 20 position (double dot dash line position Fig. 8) under steel wire 3 upwards rotates 230 ° and arrive solid line position among Fig. 8, and the end of dentation pivoted arm 21 forces the end of steel wire 3 to turn over the α angle around plastic coating steel wire 2; In the 4th step, multiple tooth push rod 30 longitudinally slides and carries out 90 ° of knottings and move (referring to Fig. 9), and dentation pushing block 31 moves solid line position the figure from the double dot dash line position, longitudinally rolls over 90 ° from steel wire 3 belows again thereby ejection has turned over 230 ° steel cord end.Like this, a knotting process has just been finished.In bending and knotting process, top board 40 is pressed on steel wire 3 on the main engine bed 10 all the time.

Claims

1, a kind of turnover plate type steel wire net rack is bent knot tying machine, can with run transverse through a plastic tube many steel wires two end portions respectively bending knotting on two plastic coating steel wires and make steel wire net rack, should bend knot tying machine by main engine bed, top board, two knife plates, two multiple tooth push rods and drive knife plate respectively, top board, the drive unit of multiple tooth push rod is formed, main engine bed longitudinally is provided with the locating slot of plastic tube and plastic coating steel wire, along the locating slot that laterally is provided with a plurality of placements knotting steel wire to be curved, it is characterized in that, vertical dual-side of described main engine bed is provided with a plurality of serrate slots facing each other, every pair of serrate slot is aimed at the locating slot of knotting steel wire to be curved, and the position near above-mentioned both sides serrate slot on the main engine bed also has been formed separately two vertical chutes; Described knife plate distributes along the longitudinal and main engine bed serrate slot corresponding toothed pivoted arm, the dentation pivoted arm can be in corresponding serrate slot around one of the longitudinal axis upset of the inboard, arm end place that is positioned at its dentation pivoted arm α angle greater than 180 °; Described multiple tooth push rod is positioned at described vertical chute of main engine bed and can longitudinally slidably reciprocates therein, and the whole length direction in its upper edge is distributed with and each serrate slot corresponding toothed pushing block, and its top surface is positioned at the below of steel wire; Described top board can be along the vertical main engine bed top of being arranged on up or down, which is provided with every steel wire is pressed on hold down gag on the main engine bed.

2, curved knot tying machine as claimed in claim 1 is characterized in that, locates to be provided with a guide pad corresponding to each serrate slot of main engine bed above steel cord end on the described top board, and guide pad is to cut one jiao rectangular shape.

3, curved knot tying machine as claimed in claim 1 or 2 is characterized in that, described hold down gag is an elastic pressuring clamping device that is arranged on the top board bottom.

4, curved knot tying machine as claimed in claim 3 is characterized in that, described top board can be moved up and down under fluid pressure drive device drives by a vertical axis of guide guiding.

5, curved knot tying machine as claimed in claim 4 is characterized in that, described α angle is 230 °.