CN101403169B

CN101403169B - Sewing machine

Info

Publication number: CN101403169B
Application number: CN2008101663726A
Authority: CN
Inventors: C·黑克纳
Original assignee: Duerkopp Adler AG
Current assignee: Durkep Adler Co.,Ltd.
Priority date: 2007-10-02
Filing date: 2008-09-26
Publication date: 2012-12-12
Anticipated expiration: 2028-09-26
Also published as: JP2009082721A; EP2045386A1; EP2045386B1; DE202007013793U1; CN101403169A; KR20090034288A

Abstract

The present invention relates to a sewing machine, which has a housing, a driving needle bar with a needle, a supporting plate for a work piece, a supply housing providing a bottom thread supply, and a light source for illuminate the inner space of the supply housing through a light channel of the supply housing. A viewing window is provided for the visual inspection of the illuminated bottom thread supply over the viewing window. Two light passage opening are provided in the supply housings.

Description

Sewing machines

Technical field

The present invention relates to a kind of Sewing machines, this Sewing machines has:

-shell,

-shank, this shank can be driven and had sewing needle up and down,

-be used for the supporting plate of sewing,

-be used to supply with the feed cassette of bottom line,

-light source, this light source is used for illuminating through the optical channel mouth in the feed cassette inner space of feed cassette.

Background technology

Known such Sewing machines from EP1394310B1.The optical receiver that passes through that proposes in the document is required great effort to the monitoring of bottom line supply and analysis subsequently very much.

Summary of the invention

One object of the present invention is improved the Sewing machines of the above-mentioned type, so that simplify the monitoring to the bottom line source of supply.

According to the present invention; This purpose realizes through a kind of Sewing machines; This Sewing machines comprises observation window, and this observation window is used for the bottom line source of supply that one side comes visual examination to be illuminated via the optical channel mouth in the feed cassette and/or another optical channel mouth via this observation window on the other hand.

Realize that according to the present invention optical channel mouth and observation window are guaranteed at Sewing machines run duration visual examination bottom line source of supply simply.At least one optical channel mouth is set on the feed cassette that does not rotate with tension disk; Thereby said optical channel mouth is not to be closed at the Sewing machines run duration always; Especially when the operating position Sewing machines that is used for inserting and take out sewing is in stopped status; Said optical channel mouth exposes, to guarantee visual examination.For common rotary feed cassette-this in theory also is possible; Can utilize such fact; That is, even the bottom line feed cassette inner space that rotation is very fast so that less optical channel mouth also can guarantee enough to illuminate feed cassette on the one hand usually allows sufficient visual examination on the other hand.The bobbin case (shuttle casket) in being contained in tension disk for example, feed cassette can also be around the shuttle base plate and/or the cover that hold the line source of supply.

Be used for making the Lights section that can be used for illuminating the feed cassette inner space increase from the light-guide device of light source guiding feed cassette light.Can the light-guide device that be designed to reflector be made the parts arranged apart with light source.

Become LED can make cost less, stable and power consumption is few light source design.

Observation window with transparent material of band antireflective surfaces can prevent noisy reflection, still, especially when observation window is arranged in the supporting plate, can supporting plate be designed to can not disturb (light) through hole.

Layout lens in observation window can make line source of supply examine zone all around be shown with the mode of amplifying.This helps visual examination.Itself can be used as optical lens observation window.

Make the inwall of feed cassette have astigmatic surface at least in part and can improve illumination the feed cassette inner space.

Make the inwall of feed cassette have colour at least in part, the light efficiency during the box inner space illumination of can improving supply on the one hand can strengthen the contrast between feed cassette and the bottom line source of supply on the other hand, and this has simplified visual examination then.

Observation window is arranged in makes things convenient for Sewing machines operator visual examination bottom line in the sewing supporting plate.Substituting or additionally, can this observation window or additional observation window be contained in the Sewing machines shell.

Observation window is lateral shift above the feed cassette center, makes the operator can under the normal running posture, carry out visual examination.Thereby the operator need not be crooked vertically above observation window.

Description of drawings

To on the basis of accompanying drawing, illustrate in greater detail below one embodiment of the present of invention.In the accompanying drawings:

Fig. 1 illustrates the front view of Sewing machines, and said front view partly demonstrates interior details;

Fig. 2 illustrates amplification and the more detailed view that the stitching of Sewing machines forms the zone and is positioned at the tension disk box of its below among Fig. 1;

Fig. 3 illustrates the view of looking along direction III of Fig. 2.

The specific embodiment

Sewing machines 1 has the substrate 2 of band column 3 and bend arm 4, and said column extends upward from substrate.The end of bend arm 4 is heads 5.Arm axle 6 can be rotatably set in the bend arm 4, the crank driving device that has thread take-up tension lever 87 in this arm axle drive head 5.This crank driving device 7 can be connected with shanks 9 in being installed in head 5 movably drivingly.Said shank has sewing needle 10 in the bottom.Sewing needle 10 can move up and down through crank driving device 7.Sewing needle 10 guides needlework 13 in pinprick, these needlework transmit via stringing device and thread take-up tension lever 8 from bobbin 12.Supporting plate 14 is installed in the substrate 2, is placed with a sewing 15 on this supporting plate.Supporting plate 14 has and is used to dog age of a draught animal that feed dog 16 is passed through.Feed dog 16 has and is used to stitching hole 17 that sewing needle 10 is passed through.Feed dog 16 is driven by feed that is installed in substrate 2 belows and lifting gear device.

The arranged beneath of supporting plate 14 has tension disk 18, and this tension disk has the tension disk body 19 of band tension disk terminal 20.In the cup-shaped bobbin case storing apparatus of tension disk body 19, be furnished with bobbin case 21, accommodate shuttle (bobbin) 21a and coiling source of supply 22 (referring to Fig. 3) in this bobbin case with the mode of screwing-locking.Line source of supply 22 provides bottom line.Said bottom line passes 17 extensions of stitching hole and sewing 15, interweaves with needlework 13 from the center of the cover 23 of shuttle 21a.Except bobbin case 21, the cover 23 of shuttle 21a and the added limitations wall of base plate as the feed cassette that supplies line source 22.

Tension disk body 19 is connected with the axle with vertical-rotation-axis 24 securely, and this parallel axes is extended in shank 9.Said axle can be rotatably set in bolt and is connected in the rest pad 25 of substrate 2.In said rest pad, power transmission shaft 26 also is installed, this power transmission shaft is connected with gear devices in being arranged in rest pad 25.Power transmission shaft 26 can be connected with arm axle 6 through driving belt 27 drivingly.

The height place of the optical channel mouth 28 in bobbin case 21, the form that on rest pad 25, is equipped with is the light source of LED (light emitting diode) 29.Between LED29 and bobbin case 21, be furnished with holding element 30, to be used for the light-guide device that form is a reflector 31.Holding element 30 and reflector 31 all have the passway that flushes each other or recess-not shown, for example to be used to observe LED29 towards the ruddiness or the white light of bobbin case 21 irradiations.Therefore LED29 is used to illuminate the inner space 32 of bobbin case 21.Reflector 31 is used for for example by the light reflected back bobbin case 21 of bobbin case 21 reflected back reflectors 31, and makes it through optical channel mouth 28, thereby the light of the major part of LED29 can be used to illuminate inner space 32.Substituting ground perhaps additionally can be provided with reflector 31 or additional reflection body or lens, so that the light of LED29 is straight (collimation) through optical channel mouth 28.

The cover 23 of shuttle 21a has along three the other optical channel mouths 33 that radially extend that circumferentially distribute, and wherein can in Fig. 3, see for two.Optical channel mouth 33 can grinding and/or drilling form.This is applicable to the optical channel mouth 28 in the bobbin case 21 equally accordingly.Optical channel mouth 33 radially extends, and makes that the outer perimeter that supplies line source 22 promptly to twine the shuttle of bottom line is visible when supplying line source 22 to extend out especially.

Above cover 23, in supporting plate 14, be furnished with observation window 34.Be arranged in the bottom line source of supply 22 that the optical channel mouth 33 of observation window below can visual examination be illuminated by LED29 via observation window 34 and at least one.Observation window 34 also can be arranged in other part of the shell that is limited substrate 2 of Sewing machines 1.

Be provided with convex lens in the observation window 34, especially planoconvex spotlight.Said lens have antireflective surfaces, and by being processed by the material that the optical wavelength of LED sees through.

The center of observation window 34 is with respect to the central cross skew of the bobbin case 21 of its below.Therefore the rotation of tension disk body 19 does not pass the center of this circle observation window 34.Said lateral shift is to consider that the operator needn't be straight down when the visual examination bottom line but observe observation window 34 from the side at a certain angle.

The inner cover wall of the inwall of feed cassette, especially shuttle 21a and interior diapire have astigmatism surface, thereby because dispersion effect, the light that passes the LED29 that optical channel mouth 28 falls illuminates entire inner space 32 basically equably.

In a kind of modification of feed cassette; The color of an inwall of this box is designed at least in part can improved light effect, perhaps make the colored interior diapire of shuttle 21a of the color of bottom line and the color of inwall-especially-between have good color contrast.

In Sewing machines operating period, the speed rotation that tension disk body 19 changes with the per minute hundreds of around non-rotary bobbin case 21.During only about half of rotation, tension disk body 19 does not cover optical channel mouth 28, does not cover the light-path between LED29 and the observation window 34 thus.Be in when inserting and taking out sewing 15 high-order when Sewing machines 1 is positioned to sewing needle 10, tension disk body 19 does not cover optical channel mouth 28 yet.Therefore, can be in this way via observation window 34 check continuously the bottom line source of supply 22 that illuminated by LED29 around and remaining bottom line source of supply.

The light of also can sensing catching the LED29 in the optical channel between LED29 and the observation window 34, this light depends on remaining bottom line source of supply.Can be at the bottom side of supporting plate 14 and for example under stitching plate boost motor or needle plate slider, arrange corresponding optical sensor.

Claims

1. a Sewing machines (1), this Sewing machines has:

-shell,

-shank (9), this shank can be driven and had sewing needle (10) up and down,

-be used for the supporting plate (14) of sewing (15),

-be used for the feed cassette (21,23) of bottom line source of supply (22),

-light source (29), this light source are used for illuminating through the optical channel mouth (28) in the feed cassette (21,23) inner space of feed cassette (21,23),

This Sewing machines comprises observation window (34), to be used for one side via this observation window (34), the bottom line source of supply (22) that comes visual examination to be illuminated via the optical channel mouth (28) in the feed cassette (21,23) and/or another optical channel mouth (33) on the other hand.

2. Sewing machines according to claim 1 is characterized in that, this Sewing machines comprises light-guide device (31), and this light-guide device is in order to be inducted into feed cassette (21,23) with light from light source (29).

3. Sewing machines according to claim 2 is characterized in that, said light-guide device (31) is designed to reflector.

4. Sewing machines according to claim 1 is characterized in that, said light source (29) is designed to LED.

5. Sewing machines according to claim 1 is characterized in that, said observation window (34) is rendered as the transparent material with antireflective surfaces.

6. Sewing machines according to claim 1 is characterized in that, said observation window is provided with optical lens in (34).

7. Sewing machines according to claim 1 is characterized in that, the inwall of said feed cassette (21,23) part at least has the astigmatism surface.

8. Sewing machines according to claim 1 is characterized in that, the inwall of said feed cassette (21,23) is partly with color at least.

9. Sewing machines according to claim 1 is characterized in that, said observation window (34) is arranged on the supporting plate (14) that is used for sewing.

10. Sewing machines according to claim 9 is characterized in that, the center of observation window (34) is lateral shift in the top, center of feed cassette (21,23).