CN101570921A

CN101570921A - Bobbin housing, gripper with such a bobbin housing and sewing machine with such a gripper

Info

Publication number: CN101570921A
Application number: CNA2009101345728A
Authority: CN
Inventors: S·勒米奇; C·勒瓦德尔
Original assignee: Duerkopp Adler AG
Current assignee: Duerkopp Adler AG
Priority date: 2008-04-29
Filing date: 2009-04-21
Publication date: 2009-11-04
Also published as: DE102008021192B4; EP2113594A1; DE102008021192A1; KR20090114308A; JP2009261949A

Abstract

The invention relates to a bobbin housing, which comprises a tank-shaped housing for accommodating a thread coil. The tank-shaped housing comprises a thread coil-accommodating chamber (35) whose inner diameter is adjusted in an area between a minimum inner diameter and an increased inner diameter. A bobbin housing is produced, which is capable of easily inserting the thread coil into the sewing machine. Thus the thread coil is assembled under pre-load, while great operation safety and reliability of the sewing machine is ensured.

Description

Bobbin case, comprise the rotating shuttle of this bobbin case and comprise the Sewing machines of this rotating shuttle

Technical field

The present invention relates to a kind of bobbin case, it comprises the tank-like shell (housing pot) that is used to admit the line structure that twines in advance.The invention still further relates to a kind of rotating shuttle that comprises this bobbin case (shuttle, hook) and a kind of Sewing machines that comprises this rotating shuttle.

Background technology

A kind of bobbin case that starts described type is disclosed in DE 10 2,006 009 966 A1.This bobbin case has good practical value.However, still need the insertion performance of this bobbin case is improved.

Summary of the invention

Therefore, (the shuttle casket bobbinhousing), so that the line structure of Chan Raoing can easily insert in advance, is guaranteed processing safety and reliability that Sewing machines is good simultaneously to an object of the present invention is to improve the bobbin case that starts described type.

According to the present invention, described purpose realizes by a kind of bobbin case, and wherein, the internal diameter of the peg or spindle receptacle of tank-like shell can be regulated between the big internal diameter at minimum diameter with than this minimum diameter.

Have been found that the variable external boundary that can make bobbin case adapt to the line structure that twines in advance of internal diameter of the peg or spindle receptacle of tank-like shell according to the present invention.This has reduced the tolerance requirement when the internal diameter that makes bobbin case adapts to the external diameter of the line structure that twines in advance, and this all is favourable for making bobbin case and making the line structure that twines in advance.By means of variable internal diameter, can more easily realize the situation that the line structure close fit of twining in advance in the peg or spindle receptacle and therefore is connected with tank-like shell friction/shape.This has guaranteed the failure-free operation of Sewing machines.If the line structure of Chan Raoing is from inside to outside used up as ordinary circumstance in advance, then can keep frictional fit almost to be used up fully up to the line structure that twines in advance.

Be used for the pre-load means that the prestrain of peg or spindle receptacle becomes to have the state of minimum diameter has been improved CONTACT WITH FRICTION between the line structure of tank-like shell and winding in advance, under the situation of preload force is arranged, pack in the tank-like shell with the line structure of guaranteeing to twine in advance.

A kind of dog-cheap embodiment of this pre-load means can be the otch that extends to from its side in tank-like shell its diapire, and this embodiment can utilize the elastic material properties of making the used material of tank-like shell.Tank-like shell can be made of metal especially.

The otch that radially extends in circular bottom wall provides the elastic qualities that can reappear especially when regulating the internal diameter of peg or spindle receptacle.

Even extending beyond the otch at diapire center can guarantee also can regulate fully internal diameter under the tank-like shell material has the situation of high elastic modulus.

Because the tank-like shell side has less thickness usually in the outer regions between the end of housing retainer and installation rib of this housing, therefore in the tank-like shell side, otch is set, and make otch in the housing receptacle, end at this outer regions, can simplify the making of otch.

Kerf width between 0-0.5mm can form by conventional preparation method.Because only function of this otch is to separate two bottom wall portions that join with otch, therefore in fact kerf width does not have lower limit.Therefore otch can for example make by Laser Processing or wire corrosion (wire erosion).In laser processing procedure, can for example be the kerf width of 50 μ m or 100 μ m.

The conical expansion portion away from the side of tank-like shell diapire that is positioned at the tank-like shell side helps the insertion of the line structure that twines in advance, and wherein, described tank-like shell side defines the periphery of peg or spindle receptacle.

The rotating shuttle that comprises shuttle body and bobbin case according to the present invention is with described corresponding in conjunction with bobbin case according to the present invention with the front according to the advantage of the Sewing machines that comprises rotating shuttle of the present invention.

Description of drawings

Describe embodiments of the invention in detail by accompanying drawing below, in the accompanying drawings:

Fig. 1 is the front view of Sewing machines, shows some interior details of Sewing machines;

Fig. 2 is the perspective view of eedle, needle plate and the rotating shuttle of Sewing machines and the bobbin case that inserted, and these parts all are depicted as its tram;

Fig. 3 is another perspective view of rotating shuttle;

Fig. 4-the 6th, the view of the bobbin case of rotating shuttle; And

Fig. 7-the 10th, the snapshot when inserting the line structure that twines in advance in the bobbin case.

The specific embodiment

Sewing machines 1 comprises substrate 2 and curved boom 4, and column 3 extends upward (Fig. 1) from substrate.Arm 4 ends at head 5.Arm axle 6 rotatably is installed in arm 4, and this arm axle is used to drive crank driver 7, has line bar 8 in head 5.Crank driver 7 can be connected to a shank 9 that can be installed in the head 5 drivingly with being shifted.Shank 9 has eedle 10 in its lower end.Eedle 10 can move up and down by crank driver 7.In this process, eedle 10 passes a space to and fro.The pinprick of eedle 10 guides the needlework of being supplied with by bobbin 12 13 through a stringing device and line bar 8.

On substrate 2, supporting plate 16 (Fig. 2) is installed, on supporting plate 16, is placed with a fabric 17 (Fig. 1) by means of the screw that passes screwed hole 14,15.Supporting plate 16 has feed dog (feed dog) opening/path 18, and this feed dog open construction becomes to allow feed dog 19 to pass through.Feed dog 19 has the pin hole 20 that shown in Figure 1 being used to passed through eedle 10.Feed dog 19 is driven by feeding that is arranged on substrate 2 belows and lifting gear.

Substrate 16 belows are provided with rotating shuttle 21, and this rotating shuttle comprises the shuttle body 22 (Fig. 2) that has spur 23.In the tank-like shell receptacle 24 of shuttle body 22 bobbin case 25 is installed rotatably, this bobbin case file layout is the line source of supply (with reference to figure 7-10) of the line structure 26 that twines in advance.For bobbin case 25 is installed, shuttle body 22 (Fig. 2) has circumferential groove, and the installation rib 24a (Fig. 4) of bobbin case 25 has a certain amount of being received in gap in this circumferential groove.The line structure 26 of Chan Raoing also abbreviates peg or spindle as in advance.Peg or spindle 26 provides sewing bottom line (bobbin thread) 27.This bottom line 27 extends to outlet 28 (Fig. 2) from peg or spindle 26 along a thread path that will describe in detail hereinafter.Bottom line or rotating shuttle line 27 extend through pin hole 20 and opening 18 from exporting 28.

Shuttle body 22 is rigidly connected to one and has the axle (with reference to figure 1) that is parallel to the vertical axis 29 that shank 9 extends.This axle is rotatably installed in the mounting structure 30, and described mounting structure is screwed on the substrate 2.Power transmission shaft 31 also is installed in the mounting structure 30, and this power transmission shaft joins with the gear drive that is arranged in the mounting structure 30.Power transmission shaft 31 can be connected to arm axle 6 drivingly via belt driver 32.Rotating shuttle 21 is driven into thus around vertical axis rotation, and therefore rotating shuttle 21 is vertical rotating shuttle.

Bobbin case 25 has the tank-like shell 33 that is used to admit peg or spindle 26, and this tank-like shell illustrates with different views in Fig. 4-6.Bobbin case 25 also has the case lid 34 (Fig. 3) that is used to hide peg or spindle 26.Case lid 34 is pivotably mounted on the tank-like shell 33 by an articulated elements, and shown in Figure 10 close or operating position and Fig. 7-9 shown in the peg or spindle insertion position between pivot, described articulated elements defines the pivot supporting member with horizontal pivot axis line.

The internal diameter of the peg or spindle receptacle 35 of tank-like shell 33 (with reference to figure 4) can be adjusted between the big internal diameter at the minimum diameter ID shown in Fig. 4-6 and than this minimum diameter.For this reason, tank-like shell 33 has the otch 36 that extends to from its side 37 its diapire 38.Tank-like shell 33 (with therefore diapire 38) is circular.With respect to the center 39 of diapire 38, otch 36 is illustrated in the lower left quarter of Fig. 4 and is cut apart-radially extend and exceed the center 39 of diapire 38 fully by otch 36 from a zone-this zone of diapire 38.The part at the center that extends beyond 39 of otch 36 almost pass diapire 38, the radius between center 39 and tank-like shell side 37 other 2/3.At this end near diapire, otch 36 ends at the end 40 of sphering (rounding).In the zone at center 39, otch 36 is by a manhole 41, and this through hole is auxiliary installing hole.

Otch 36 in tank-like shell side 37, end at housing retainer 42 and install rib 24a in the outer regions between the end 43 of housing retainer.

In the embodiment shown, otch 36 with its radially vertical direction on kerf width be 0.25mm.Also can imagine other kerf width.In a kind of alternative embodiment of otch, the developed width of otch is 0, that is to say, two wall parts of the qualification otch of diapire form back butt joint mutually at otch.Also can imagine at 0 other kerf width to the 0.5mm scope for example.

Making progress upward, just in the side away from diapire 38, peg or spindle receptacle 35 ends in the conical expansion portion 44.

As described below with in the peg or spindle 26 insertion bobbin cases 25 (Fig. 7): the first step, when case lid 34 is opened, peg or spindle 26 is put into and is positioned in the conical expansion portion 44 of tank-like shell 33.Then, along (towards) direction of the diapire 38 of bobbin case 25 from the top (direction arrow 55) exert pressure to peg or spindle 26.This pressure makes peg or spindle 26 increase the internal diameter of tank-like shell side 37 slightly, and therefore increases the internal diameter of tank-like shell 33, and this otch 36 that causes extending in tank-like shell side 37 expands respective degrees to.Therefore, the internal diameter of resulting peg or spindle receptacle 35 enlarges slightly with respect to minimum diameter ID, and corresponding to the external diameter of peg or spindle 26.Be inserted into fully the tank-like shell 33 from the top with peg or spindle 26 now, contact (seeing Fig. 8-9) with diapire 38 up to this peg or spindle.But present closing cap 34 (see figure 10)s.

Tank-like shell 33 comprises elastomeric material, and is made of metal in the present embodiment.This has guaranteed that tank-like shell 33 applies preload force on the periphery wall of peg or spindle 26 after the internal diameter of peg or spindle receptacle 35 enlarges.This preload force depends on the internal diameter enlarged degree after the insertion peg or spindle 26, length and the thickness of tank-like shell and the material parameter of tank-like shell material of otch 36.The preload force on the peg or spindle 26 of being applied to the internal diameter of the expansion by tank-like shell causes the reliable frictional fit between peg or spindle 26 and tank-like shell 33, thereby prevents that peg or spindle 26 is with respect to tank-like shell 33 rotations.

Peg or spindle 26 is used up from inside to outside, so the maintenance frictional fit always between the inwall of the periphery of peg or spindle 26 and peg or spindle receptacle 35, is almost completely used up up to peg or spindle 26.

Claims

1. bobbin case (25) comprising:

-be used to admit in advance the tank-like shell (33) of the line structure (26) that twines,

It is characterized in that the internal diameter of the peg or spindle receptacle (35) of described tank-like shell (33) can be regulated between the big internal diameter at minimum diameter (ID) and than this minimum diameter.

2. bobbin case according to claim 1 is characterized in that, described peg or spindle receptacle (35) is become to have the state of minimum diameter (ID) by prestrain by pre-load means.

3. bobbin case according to claim 1 is characterized in that, described tank-like shell (33) is provided with otch (36), and this otch extends to the diapire (38) of tank-like shell (33) from tank-like shell side (37).

4. bobbin case according to claim 3 is characterized in that, described diapire (38) is circular, and wherein otch (36) radially extends.

5. bobbin case according to claim 3 is characterized in that, described otch (36) extends beyond the center (39) of diapire (38).

6. bobbin case according to claim 3, it is characterized in that, for tank-like shell (33) is installed, in tank-like shell side (37), end in the housing receptacle (24) in the outer regions of described otch (36) between the end (43) of a housing retainer (42) and an installation rib (24a).

7. bobbin case according to claim 3 is characterized in that, the kerf width of described otch (36) is between 0-0.5mm.

8. bobbin case according to claim 1, it is characterized in that, tank-like shell side (37) limits the periphery of described peg or spindle receptacle (35), and this tank-like shell side (37) has conical expansion portion (44) on the side away from the diapire (38) of tank-like shell (33).

9. rotating shuttle (21) comprises shuttle body (22) and according to the described bobbin case of one of claim 1-8 (25).

10. Sewing machines (1) comprises rotating shuttle according to claim 9 (21).