CN2232449Y

CN2232449Y - Sewing machine for straw curtain

Info

Publication number: CN2232449Y
Application number: CN 95231536
Authority: CN
Inventors: 刘柏林; 刘跃华
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-27
Filing date: 1995-06-27
Publication date: 1996-08-07
Anticipated expiration: 2005-06-27

Abstract

The utility model relates to a sewing machine for a straw curtain, which is composed of an electric motor, a driving-belt, a material feeding mechanism and a sewing mechanism which are separately driven by a crank (which is used as a belt wheel simultaneously) and synchronously operated. The sewing mechanism is that a machine needle plate is driven by a crank connecting rod to perform a reciprocating action up and down, which enables the machine needle and the needle hooker to be sewed fully. At the same time, the material feeding mechanism which is composed of a set of adjustable eccentric wheels which are respectively arranged on both ends of a main shaft and a driven shaft and a material feeding thorn frame which is fixed on the outer sleeve of a slide shaft bearing of the eccentric wheels feeds the materials continuously. Thus the automatic sewing of the straw curtain is completed. The utility model has the advantages of simple structure, convenient adjustment and repairing of the material feeding mechanism and low cost.

Description

A kind of straw screen or mat Sewing machines

The utility model relates to Sewing machines, and particularly a kind of is the Sewing machines that material is made straw screen or mat with the straw.

Designer of the present utility model once disclosed a kind of straw screen or mat Sewing machines in the CNZ91222462.2 Chinese patent, this machine is made of motor, driving belt, crank suturing mechanism and the feed mechanism that belt wheel drives synchronous operation respectively of holding concurrently.Its suturing mechanism by main shaft, crankwheel, connecting rod, eedle plate, guide rod, be installed in eedle plate bottom one group of eedle, constitute by cam-actuated crochet hook device, crochet hook device cover plate, bobbin pin and turnbuckle by main shaft; Its feed mechanism is made of hypodontia gear, fixed axis gear, planetary gear, material conveyer belt and band roller.A very big shortcoming of this straw screen or mat Sewing machines is the feed mechanism complex structure, has 5 axles, 3 gears, and by 24 root for activating collaterals V-belts and 12 two groups of material conveyer belts up and down that flat rubber belting is formed, four band rollers and 10 parts such as bearing of constituting by 24 steamboats.Because complex structure, make the adjustment of machine and keep in repair pretty troublesome, especially the size of adjusting the sewing stitch need be changed the hypodontia gear of the different numbers of teeth, and the dismounting of hypodontia gear relates to other parts that dismounting is connected, concerning the on-the-spot user of service who lacks in training, be undoubtedly the very difficult thing of part.Simultaneously, because complex structure, parts are many, make that the complete machine cost is higher.

The purpose of this utility model is that above-mentioned existing straw screen or mat Sewing machines is improved, and provides that a kind of feed mechanism is simple in structure, manufacturing cost is lower, adjustment and straw screen or mat Sewing machines easy to maintenance.

The straw screen or mat Sewing machines that the utility model provides, its suturing mechanism and the disclosed Sewing machines of above-mentioned CNZ91222462.2 patent are identical, different is that the feed mechanism of this straw screen or mat Sewing machines is made of one group of feeding sour jujube frame of making the upper right iterative motion in lower-left that is installed in the eccentric wheel at main shaft and driven shaft two ends respectively and is driven by this group eccentric wheel.

Accompanying drawing is depicted as the structural representation of the three needle grass curtain Sewing machiness that the utility model provides.Wherein Fig. 1 is stereogram (left front is cut open); Fig. 2 is the side view of feeding part among Fig. 1.Fig. 3 is its vertical view; Fig. 4 is along Fig. 2 A-A cutaway view.

In conjunction with Fig. 1 to Fig. 4, the detailed structure and the operating principle of the utility model straw screen or mat Sewing machines are as follows: starter motor 8, motor drives the cranks belt wheel 12 of holding concurrently by transmission V belt 10 and rotates, by main shaft 11, be fixed on the crankwheel 25 of main shaft 11 other ends and connecting rod 13 rotation is become eedle plate 19 that the bottom is equipped with one group of eedle 18 along being fixed on sliding up and down of guide rod 17 on the frame 5, two-wheeled whenever circles, the suture that eedle traction is sent by bobbin pin 23 and turnbuckle 22 pumps once from feeding platform is held concurrently the pin hole 20 of crochet hook device cover plate 2, and with by the cam 15 that is installed on the main shaft 11, extension spring 16, the crochet hook device that crochet hook 6 and hooked needle shaft 9 are formed is finished the hook line action of a stitch together; Meanwhile, drive feeding sour jujube framves 3 by four eccentric wheels that are installed in main shaft 11 and driven shaft 7 two ends respectively 14 to finish → left side → down → right → go up the reciprocating motion one-period.For becoming This move surely, eccentric wheel 14 is by forming the driven pulley 27 that off-centre fixedlys connected and constitute with taking turns by bolt 31 and this circle with the concentric circle wheel of fixedlying connected 30 of main shaft, four screw cross sections on the driven pulley are rectangle, thereby make eccentric throw adjustable, the driven pulley periphery is equipped with bush of bush bearing 28, the top of sliding bearing overcoat 29 is fixed together (available welding or bolt are connected) with the bottom surface of feeding sour jujube frame 3, like this, when eccentric wheel rotates, the sliding bearing overcoat can only be followed the upper right reciprocating motion in lower-left in the eccentric crop rotation by sour jujube frame 3 fixing can not rotations; Feeding sour jujube frame 3 be positioned at feeding platform hold concurrently crochet hook device cover plate 2 below, one group of ratchet 4 that distributes along feedstock direction is arranged at its top, every group of ratchet can be respectively stretches out from feeding platform is held concurrently the slit that crochet hook cover plate 2 offers, when feeding sour jujube frame by lowest order along the upper right side when moving, ratchet stretches out cover plate 2, in the straw of insertion by 1 feeding of stone platform, subsequently ratchet with feeding sour jujube frame to left movement, straw is pushed forward, ratchet changes to left down the direction motion over to the sour jujube frame then, fall back on cover plate 2 below, repeat above-mentioned action again after arriving lowest order, form to sew up and work in coordination, carry out synchronously with feeding.In order to adjust the thickness of straw screen or mat, install by two adjustable fixed heads 24, the cross bar 21 of fixedlying connected on the top that is positioned at cover plate 2 on the frame and be installed in the thickness adjusted mechanism that one group of presser feet 26 on the cross bar constitutes with this fixed head, can adjust the thickness of straw screen or mat by the height of adjusting fixed head 24, high highly more, thickness is thick more.

But the width requirement of the eedle quantity root a tree name straw screen or mat of this straw screen or mat Sewing machines and designing, general 1.2 meters wide straw screen or mat can be taked 6 pins, and 1.8 meters wide straw screen or mat can be taked 8 pins.

The utility model straw screen or mat Sewing machines, its feed mechanism replaces a plurality of axle of the prior art, gear, material conveyer belt and band roller with four eccentric wheels and feeding sour jujube frame, and structure is simplified greatly, thereby makes complete machine reduce cost more than 30%, weight saving about 40%.When need are adjusted stitch, need not change any work, only need the fastening bolt of loosening eccentric wheel two-wheeled, adjusting two-wheeled centre distance is the eccentric wheel eccentric throw, can change stitch (stitch equals the twice eccentric throw), this all is simple and easy going to any user of service.

Claims

1, a kind of straw screen or mat Sewing machines, by motor (8), driving belt (10) and crank suturing mechanism and the feed mechanism that belt wheel (12) drives synchronous operation respectively of holding concurrently constitutes, suturing mechanism is by main shaft (11), be installed in the crankwheel (25) of the main shaft other end, connecting rod (13), eedle plate (19), guide rod (17), be installed in one group of eedle (20) of eedle plate bottom, the crochet hook device (6 that main shaft drives by cam (15), 16,9), the feeding platform crochet hook device cover plate (2) of holding concurrently, bobbin pin (23) and turnbuckle (22) constitute, and it is characterized in that: said feed mechanism is made of one group of feeding sour jujube frame (3) of making the upper right iterative motion in lower-left that is installed in the eccentric wheel (14) at main shaft (11) and driven shaft (7) two ends respectively and is driven by this eccentric wheel.

2, as the said straw screen or mat Sewing machines of claim 1, it is characterized in that: said eccentric wheel (14) is by being constituted with the driven pulley (27) of fixedlying connected with this circle wheel decentraction by bolt (31) with the concentric circle wheel (30) of fixedlying connected of main shaft (11), the periphery of driven pulley (27) is equipped with sliding bearing, and the bottom surface of the overcoat of this sliding bearing (29) top and said feeding sour jujube frame (3) is fixed together.

3, as the said straw screen or mat Sewing machines of claim 1, it is characterized in that: the top that is positioned at said cover plate (2) on frame (5) is installed by adjustable fixed head (24), the cross bar (21) of fixedlying connected with this fixed head and is installed in the thickness adjusted mechanism of one group of presser feet (26) formation on the cross bar.