Classifications

• • D—TEXTILES; PAPER
  • D05—SEWING; EMBROIDERING; TUFTING
  • D05B—SEWING
  • D05B29/00—Pressers; Presser feet
  • D05B29/12—Presser-foot attachment
• • D—TEXTILES; PAPER
  • D05—SEWING; EMBROIDERING; TUFTING
  • D05B—SEWING
  • D05B55/00—Needle holders; Needle bars
  • D05B55/02—Devices for fastening needles to needle bars
• • D—TEXTILES; PAPER
  • D05—SEWING; EMBROIDERING; TUFTING
  • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
  • D05D2203/00—Selection of machines, accessories or parts of the same kind
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T279/00—Chucks or sockets
  • Y10T279/17—Socket type

Definitions

• Attachment of very small tools for example drills, punches, needles or any other type of long-shaped part, with a diameter of the order of 1 mm or less, on a driving member , for example a spindle or a needle bar, in the case of sewing or embroidery machines, and in a particularly precise predetermined position, represents, for many people, a non-negligible difficulty.
• a driving member for example a spindle or a needle bar
• This difficulty is due in particular to improper handling due to the small size of such objects and, very often, to their generally very pointed shape, therefore to the potential risk of unpleasant or even dangerous injuries if these objects are rusted, which users may incur. .
• the housing provided for the insertion of a needle into the flange with which the bar is very often occupied a position whose access is relatively difficult so that it is not uncommon to see users either place the needle in this housing in an incorrect angular position, or not introduce it completely.
• the present invention relates more particularly to an assembly for removably mounting a tool on a driving member of the type described in this latter document, that is to say an assembly comprising a tool holder, a head for fixing the tool holder intended to be associated with said member and comprising at least one seat for a corresponding part of this tool holder, a device for holding the tool holder in contact with the seat by said part and means fixing, unequivocally, the relative position of the fixing head and the tool holder when the latter is subject to the holding device, assembly in which said unequivocal positioning means comprise at least one stop member preventing any movement of the tool holder on the seat at least in a determined direction, stop members preventing any movement of this tool holder on said seat according to any one of the transverse trajectories to said direction det closed, and at least one thrust member acting on the tool holder in the direction of keeping it in permanent contact with said stop member, that is to say in said unequivocal position relative to the head of fixation.
• said unequivocal positioning means
• the assembly according to the invention lends itself particularly well to a miniaturized execution of the fixing head, and especially of the tool holder, which is hardly the case with the device which is the subject of US patent 1,899,303.
• a tool holder may have dimensions of importance comparable to that of the tool, in particular a needle sew, therefore very weak, while being sufficient to allow easy gripping by the fingers of the user.
• FIG. 1 is a front elevation thereof
• Figure 2 a side view
• Figure 3 is a view similar to that of Figure 2 with partial section on III - III of Figure 1;
• Figure 4 is a sectional view along the axis IV - IV of Figure 6;
• Figure 5 is a detail section, along V - V of Figure 3;
• Figure 6 is a section on VI - VI of Figure 2;
• Figure 7 is a bottom view, along VII - VII of Figure 1;
• Figure 8 is a front view of an element of FIG. 4;
• Figure 9 is a section on IX - IX of this Figure 4;
• FIGS. 10, 11 A and 11B illustrate variants of the execution of an essential part of the assembly according to the invention;
• Figure 12 is a front view of another alternative embodiment of such a part;
• Figure 13 is a side elevation showing another possible use of the assembly according to the invention.
• the assembly shown in the drawings is intended to ensure the removable fixing of a long-shaped piece, for example a needle sewing needle, of which only the upper section 1 is visible in the drawing, at the lower end of a needle bar l
• a needle sewing needle for example a needle sewing needle, of which only the upper section 1 is visible in the drawing, at the lower end of a needle bar l
• the assembly shown comprises a tool holder and a fixing head generically indicated by your references 3 and 4, respectively ( Figures 1 and 2).
• the tool holder 3 is constituted here by a generally elongated plate, partly rectangular, made of synthetic material for example, the front face of which, in the drawing, has, on the one hand, a boss 3a, disposed in the light position. ment off-center to the right with respect to the Longitudinal axis of symmetry of the plate ( Figure 1) and, on the other hand, two rectangular notches 3b and 3c formed along the left and right edge, respectively, of the plate . The usefulness of the slots 3b and 3c will appear subsequently.
• the boss 3a As for the boss 3a, it is crossed by a threaded passage 3d, communicating with a straight blind opening 3e ( Figures 1 and 5) in which is inserted
• the punch 1 that a screw 5, engaged in the passage 3d, allows axially block at its end.
• the punch is removably fixed in the tool holder 3 and can therefore be replaced easily by simply unscrewing the screw 5 and screwing it back after the insertion of another punch, for example, in the opening 3rd.
• the tool holder has two cylindrical té ⁇ tones 3f and 3g projecting symmetrically, on either side of the plate 3 and whose usefulness will appear later.
• the tool holder On the upper part of its posterior face, the tool holder has, on the one hand, a hollow between 3 o'clock in the form of a bowl. and, on the other hand, a cutout 3i.
• the upper edge 3k of the tool holder 3 has a profile of semi-circular section over its entire length.
• the tool holder 3 In the fixing position on the head 4, the tool holder 3 is engaged by its rectangular part in a seat of homo ⁇ logue shape, 4a, cut out on the front face of the head ( Figures 1 and 4), seat in which the tool holder is blocked by the action of two jaws 6a and 7a which are inserted into the notches 3b and 3c already mentioned, under the action of a spring 8 stretched between the posterior ends of two levers 6 and 7 of which these jaws constitute the anterior ends ( Figures 1 and 6).
• levers 6 and 7 are partially engaged in cutouts correspon ⁇ dantes 4b and 4c, formed on the side faces of the head 4 and communicating, at the rear of it- ci, by a window 4d Delivering passage to the spring 8.
• levers are articulated on vertical axes 9a and 9b ( Figures 2, 3, 6 and 7) driven into corresponding housings formed in the body of the head 4 and passing respectively through the cutout 4b, for the first axis, and the cutout 4c , for The second ( Figures 3 and 6).
• the front part of the jaws 6a and 7a is cut in the form of a bevel with a slightly rounded profile; correspondingly, the posterior part of the lateral faces of the tool holder 3 also has a bevel profile of similar inclination (FIG. 6).
• both of the jaws 6a and 7a and of the tool holder is essentially intended to allow, if necessary, to control the spacing of these jaws during the introduction of the tool holder into the seat 4a of the head 4 : Indeed, when the tool holder is brought into contact with the jaws 6a and 7a by its bevelled parts, it will suffice to exert a slight pressure on the tool holder so that these jaws move apart at L 'against the action of the spring 8 already mentioned and let the tool holder engage in the seat 4a of the head 4.
• the height of the jaws 6a and 7a is less than the length of the two rectangular notches (3b, 3c) with which the tool holder 3 is provided.
• This blade 10 is fixed to the bottom of the seat 4a of the head 4 by a screw 11 engaged in a threaded passage 4g formed in the head and communicating with a vertical housing 4h in which the lower end of the pin 2 is introduced. Note that the screw 11 is also used for fixing this pin in the housing 4h of the head 4.
• the blade 10 has, in addition, a curved tongue 10c, which engages in the cutout 3i of the tool holder 3 when the latter is positioned as illustrated in FIG. 4.
• the upper edge of the recess constituting the seat 4a of the head 4 consists of the bottom of a groove 4i, with semi-cylindrical profile, of radius corresponding to that of the upper edge 3k of the tool holder 3.
• the difference in level between the upper part of the edge 3k and the upper part of one or the other cylindrical pin (3f and 3g) of the plate 3 corresponds substantially to the difference in level between the bottom portion of the groove 4i occupying the highest position and the horizontal position of the underside of the spoilers 4e and 4f.
• the introduction of the tool holder 3 in the seat 4a of the head 4 can be carried out in a safe and easy manner: it suffices, in fact, to start by placing this tool holder in the inclined position sketched in broken lines in FIG. 4 by inserting its rounded upper edge in the groove 4i of the head 4.
• the tool holder is then tilted in direction F (fig. 4) while spreading the jaws 6a and 7a, either by proceeding in the manner already described, or by tightening the levers 6 and 7 against the action of the spring 8, then the latter are released as soon as the tool holder reaches the vertical position visible in the drawing, in which the pins 3f and 3g are placed between the spoilers 4e and 4f and the legs 10a and 10b of the blade- spring 10. It should be noted that these are profiled in such a way that they are then slightly bent in a clockwise direction so that they exert a slight vertical pressure on the tool holder and thus ensure the maintenance thereof. in a perfectly defined axial position, pressing against the bottom of the groove 4i.
• the jaws of the head 4 have only the function of ensuring the maintenance of the tool holder in a position which is fixed by the engagement of the upper edge 3k of this tool holder in the groove 4i of the head, on the one hand, and the elastic action exerted by the legs 10a and 10b on the pins 3f and 3g, on the other hand, it would be possible, in a variant not shown, to entrust this positioning function exclusively to the jaws 6a and 7a: for this purpose, it would suffice to size these jaws so that they engage in the notches 3b and 3c without any play, the height the first corresponding substantially to the length of the others.
• the tool holder and the tool could form a non-removable whole, the punch 1 being driven into the passage 3e of the tool holder, or even being fixed therein by overmolding, especially if the tool holder is made of injected plastic.
• the polarizing element could be made up exclusively by. the screw 11 protruding into the recess 3h of the plate.
• the keying device may be formed by any element, projecting into the bottom of the seat 4a, and by a corresponding recess provided on the back of the plate 3, recess in which this element will be placed if pla ⁇ quette is inserted correctly: this element will, on the contrary, constitute an obstacle to such an insertion if the user tries to insert this plate upside down.
• the user will be able to realize visually that he is going to mount the tool holder in the place or upside down: in fact, the front side It will generally be covered with inscriptions, signs or ideograms corresponding, for example, to a trademark and / or a codification characteristic of the tool in question.
• the seat for the tool holder 3 is formed by a simple vertical surface formed on the front part of the head 4 and that the positioning of this tool holder is ensured by contact of its upper edge with a horizontal rod 4i ′ secured to the head 4, fixed on the latter at a distance from the seat less than the thickness of the tool holder.
• this very simple architecture makes it possible to mount the tool holder 3 on the head 4 in the same way as described above, that is to say by first placing the tool holder in the position illustrated in phantom and by tilting it clockwise while keeping it in permanent contact with the rod 4i '.
• the upper edge of the tool holder 3 is cut in a bevel and is intended to be engaged in a groove 4i ", of substantially triangular cross section, formed in the head 4, at the end upper groove of the seat intended to receive the tool holder.
• This groove has an angular amplitude of value greater than that of the inclination of the bevel formed by the upper edge of the tool holder so as to allow, first of all, a easy insertion of this edge (as in the dashed line representation of the tool holder) in the groove 4i "without having to move aside the jaws 6a and 7a, then an easy engagement of the tool holder 3 between these jaws (position shown in solid lines).
• the tool holder can in no case be arranged to upside down with respect to the arrangement illustrated in FIG. 11B, the back of the beveled portion of the tool holder abutting against the extreme right edge of the groove 4i ".
• the fabric press j> is formed by a sleeve, for example made of synthetic material, mounted to slide on the body of the needle 1 and subjected to the action of a spring r_ stretched between the press -cloth itself and the lower part of the Lie 3 needle holder.
• FIG. 13 we can see a stuffing press comprising a sole 31 articulated at 32 on a support 23, the upper part of which is shaped identically to the tool holder 3 described above, and which is fixed on a head fixing 24 whose structural elements correspond, in all points, to those of the fixing head 4, also already described.
• the fixing head 24 is fixed to the lower end of a vertical bar 22, partially shown and extending parallel to the needle bar Lie 2 * of the sewing machine, bar provided, in the traditional way , a 4 * flange to La ⁇ which is removably attached a 1 * needle.
• a fixing head of this type could very well be mounted on a support other than a bar such as bar 22: it could, for example, be fixed to the free end of the lever 70, respectively 170 , appearing in FIG. 1, respectively in FIG. 7, of the drawings of application EP 0 378 965 concerning a "press-stuffing device for a sewing machine", published on July 25, 1990 and to which reference will be made for more details. .
• the assembly described and shown lends itself particularly well to fixing, on a driving member, for example a needle bar, of any other type of part, whether it itself constitutes a tool or, more simply , a fixing rod of any device to be associated, at least momentarily, with the driving member.
• a driving member for example a needle bar, of any other type of part, whether it itself constitutes a tool or, more simply , a fixing rod of any device to be associated, at least momentarily, with the driving member.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Sewing Machines And Sewing (AREA)
• Connection Of Plates (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Details Of Cutting Devices (AREA)
• Portable Nailing Machines And Staplers (AREA)

Applications Claiming Priority (4)

Publications (2)

Family

ID=25693747

Family Applications (1)

Country Status (15)

Families Citing this family (9)

Family Cites Families (16)

• 1990
  • 1990-10-05 CN CN90108264A patent/CN1050913A/zh active Pending
  • 1990-10-10 DE DE69007466T patent/DE69007466T2/de not_active Expired - Fee Related
  • 1990-10-10 HU HU907938A patent/HUT67300A/hu unknown
  • 1990-10-10 JP JP2513526A patent/JPH04502269A/ja active Pending
  • 1990-10-10 EP EP90914500A patent/EP0448666B1/de not_active Expired - Lifetime
  • 1990-10-10 BR BR909006951A patent/BR9006951A/pt not_active IP Right Cessation
  • 1990-10-10 US US07/689,818 patent/US5143006A/en not_active Expired - Fee Related
  • 1990-10-10 AU AU64481/90A patent/AU634293B2/en not_active Ceased
  • 1990-10-10 CA CA002044141A patent/CA2044141A1/fr not_active Abandoned
  • 1990-10-10 KR KR1019910700598A patent/KR920701556A/ko not_active Withdrawn
  • 1990-10-10 WO PCT/CH1990/000239 patent/WO1991005900A1/fr not_active Ceased
  • 1990-10-10 ES ES90914500T patent/ES2051023T3/es not_active Expired - Lifetime
  • 1990-10-11 PT PT95567A patent/PT95567A/pt not_active Application Discontinuation
  • 1990-10-11 MX MX022795A patent/MX173678B/es unknown
  • 1990-10-12 PL PL90287297A patent/PL164703B1/pl unknown

Non-Patent Citations (1)

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