JP3997474B2 - sewing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a sewing machine, and more particularly to a technique in which a fixing member for fixing a shaft-like member to a frame member is attached and held in an attachment hole of the frame member.
[0002]
[Prior art]
  Conventionally, various sewing machines are provided with rotating shafts such as an upper shaft and a lower shaft that transmit driving force to a needle bar, a rotary hook, and the like. Rotating shafts such as an upper shaft and a lower shaft are fitted in a plurality of bearing members and are rotatably supported, and each bearing member is fixed to a frame member of the sewing machine.
[0003]
  In the sewing machine put to practical use by the applicant of the present application, a cylindrical bearing member called a metal is provided as a bearing member for rotatably supporting the rotating shaft, and the bearing member is fixed to the frame member with a pinch sleeve. is there.
[0004]
  For example, when a bearing member that rotatably supports the hook drive shaft is fixed to the pot base frame with a pinch sleeve, a horizontal hole is formed in the pot base frame, and the bearing member is fitted in the horizontal hole. A vertical hole communicating with the horizontal hole is formed, and a pinch sleeve is fitted into the vertical hole.
[0005]
  The pinch sleeve has a pair of upper and lower pinch sleeve members connected by a fastening screw, and the pinch sleeve has a notch surface cut out in a circular arc shape across the pair of pinch sleeve members. Yes.
[0006]
  When the bearing member is assembled and fixed in the horizontal hole of the pot base frame, the pinch sleeve is fitted in the vertical hole in advance, and in this state, the bearing member is fitted in the horizontal hole and the fastening screw is rotated. The pair of pinch sleeve members are relatively brought close to each other, and the bearing member is pressed against the inner surface of the horizontal hole by the notch surface to fix the shaft member to the pot base frame.
[0007]
[Problems to be solved by the invention]
  As in the prior art, the pinch sleeve fitted in the vertical hole of the frame member can move in the vertical direction and can also rotate around the vertical axis when the bearing member is not fitted in the horizontal hole. It is in a state, and in some cases, it may fall out and fall. At present, the friction force acting between the pinch sleeve and the inner surface of the vertical hole enables the pinch sleeve fitted in the vertical hole to be held, but it alone is not reliable.
[0008]
  Only when the pinch sleeve is fitted into the vertical hole and positioned at a predetermined position, the bearing member can be fitted into the horizontal hole and assembled, but once the pinch sleeve is positioned at the predetermined position, When the pinch sleeve moves from the position, the bearing member cannot be assembled, and the pinch sleeve must be positioned again at a predetermined position, which is very difficult.
[0009]
  As described above, the pinch sleeve fitted in the vertical hole of the frame member can move in the vertical direction and can also rotate around the vertical axis without the bearing member being fitted in the horizontal hole. Since it becomes an unstable state, there is a high possibility that the above problem will occur.
[0010]
  An object of the present invention is to securely hold a fixing member attached to an attachment portion of a frame member with a simple structure, position the fixed member in a state where it is prevented from coming off and preventing rotation, and the shaft-like member to the frame member smoothly It is to provide a sewing machine that can be securely assembled and fixed.
[0011]
[Means for Solving the Problems]
  The sewing machine according to claim 1 is:FFormed on the lemma, Axial or cylindricalA first support portion for supporting a peripheral surface portion of the shaft-shaped member; and the frame member.Perpendicular to the axial direction of the first supportA fixing member formed with a partially cylindrical second support portion that is inserted through the formed mounting hole and supports the peripheral surface portion of the shaft-like member from the side opposite to the first support portion; and the fixing memberAre inserted and connected in the axial direction of the mounting hole,TightenByA fastening member for pressing and fastening the first and second support portions to the circumferential surface of the shaft-shaped member;In a sewing machine equipped withFor fixing the shaft-like member to the frame memberBeforeThe fixing member attached to the mounting holeOn the frame memberHolding machineStructureThe holding mechanism is included in the fixing member.Sandwiching the fastening memberThe second support partofOf the outer peripheral portion on the opposite side and the frame memberSaidFixing memberSaidPaired with the outer peripheryCover this outer periphery accordinglyMounting hole formation partWhenA recess provided on one side of the fixing member,SaidThe outer peripheral portion and the frame memberSaidMounting hole formation partWhenIt has a convex part which is provided in the other of this and engages with the above-mentioned concave part.
[0012]
  This sewing machine, for example, when fixing the shaft member to the frame member, when fixing the bearing member that rotatably supports the shaft such as the upper shaft (main shaft) and the lower shaft, etc. In order to fix the shaft-shaped or cylindrical shaft-shaped member to the frame member by the fixing member, this is applied when the fixing member is held.
[0013]
[0014]
  When the shaft-shaped member is fixed to the frame member, the shaft-shaped member is smoothly inserted into the frame member in a state where the fixing member is inserted into the mounting hole of the frame member and is positioned at a predetermined position while being prevented from coming off and rotating. It can be securely assembled and fixed.
[0015]
[0016]
[0017]
[0018]
  In this sewing machine, the frame memberAxial or cylindricalA first support portion for supporting the peripheral surface portion of the shaft-shaped member is formed, and the frame memberPerpendicular to the axial direction of the first supportA fixed cylindrical member that is inserted through the formed mounting hole is formed with a partially cylindrical second support portion that supports the peripheral surface portion of the shaft-shaped member from the side opposite to the first support portion. Fastening memberIs inserted and connected to the fixing member in the axial direction of the mounting hole.Fixed memberTheTightenByThe first and second support portions are pressed and fastened to the peripheral surface of the shaft member, and the shaft member is fixed to the frame member. Of the fixed membersWith a fastening memberThe second support partofCorresponds to the outer peripheral part of the opposite side and the outer peripheral part of the fixed member of the frame memberAnd cover this outer peripheryMounting hole formation partWhenA recess is provided on one side of thethisThe outer periphery and the frame memberthisMounting hole formation partWhenIn the state in which the convex portion is provided on the other side and the fixing member is attached to the mounting hole of the frame member, the convex portion engages with the concave portion and the fixing member is held in the mounting hole.
[0019]
  A sewing machine according to a second aspect of the present invention is the sewing machine according to the first aspect, wherein the fastening member is the fastening member.InsertionA pair of fixing members that are connected and relatively moved apart from each other by rotation of the fastening member are provided, and at least one of the pair of fixing members is held by the holding mechanism. It is.
[0020]
  A pair of fixing members as fixing members are fastening members.InsertionThe pair of fixing members are relatively approached and separated by the rotation of the fastening member. With the pair of fixing members spaced apart to a certain extent, the shaft-like member is inserted between the first and second support portions, and then the fastening member is rotated to relatively approach the pair of fixing members. Thus, the first and second support portions can be pressed and fastened to the peripheral surface of the shaft-shaped member. By holding at least one of the pair of fixing members by the holding mechanism, the entire fixing member can be held in the mounting hole of the frame member, and can be positioned at a predetermined position while being prevented from coming off and rotating.
[0021]
  The sewing machine of claim 3 is characterized in that, in the invention of claim 1, one fixing member is provided as the fixing member, and the fastening member is inserted into the fixing member and screwed into the frame member. is there.
[0022]
  A fastening member is inserted into one fixing member as the fixing member, and the fastening member is screwed to the frame member. With the fastening member loosened, the shaft-like member is inserted between the first and second support portions, and then the fastening member is rotated to fasten the fixing member, and the first and second surfaces are fastened to the circumferential surface of the shaft-like member. The second support portion can be pressed and fastened. By holding this fixing member by the holding mechanism, it can be positioned at a predetermined position while being prevented from coming off and rotating.
[0023]
  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the screw member is screwed to the fixing member or the frame member so as to be rotatable, and the convex portion is configured by the screw member. It is a feature. By rotating the screw member, it is possible to easily engage or disengage the convex portion constituted by the screw member with the concave portion. Therefore, the fixing member can be easily attached to the attachment hole of the frame member.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described with reference to the drawings. This embodiment is an example when the present invention is applied to a structure for fixing a bearing member to a shuttle base frame provided in a sewing machine bed portion in a two-needle sewing machine. Note that the left side of FIG. 1 will be described as the left side.
[0025]
  FIG. 1 is a perspective view of the two-needle sewing machine M from the front upper side with the front half of the bed 1 cut out. As shown in FIG. 1, a pair of left and right hook base units 5 and 6 corresponding to a pair of left and right sewing needles 2 are provided inside the bed portion 1 of the two-needle sewing machine M. It is fixed so that it can be unlocked. In addition, 1a is a needle plate, and a pair of sewing needles 2 penetrates the needle plate 1a and moves up and down.
[0026]
  Since the pair of pot base units 5 and 6 includes a pair of left and right horizontal hooks 3 and 4 and basically has a symmetrical structure, the left pot base unit 5 will be described below. About the unit 6, the same code | symbol as the left pot base unit 5 is attached | subjected fundamentally, and description is abbreviate | omitted.
[0027]
  As shown in FIGS. 1 to 5, the pot base unit 5 includes a horizontal hook 3, a pot base frame 10 (corresponding to a frame member), and a pinch sleeve 11 (a fixing member) that fixes the bearing member 7 to the pot base frame 10. Corresponding), the bearing member 7 is pinched sleeve 11 and the pot base frame10In order to fix the pinch sleeve, the pinch sleeve holding mechanism 12 (corresponding to a holding mechanism) for holding the pinch sleeve 11 on the pot base frame 10 is provided.
[0028]
  The pot base frame 10 is formed in a block shape, and is provided with a fixing portion 20 formed with a long hole 20a on the left and right at the front end thereof, and a bolt (not shown) inserted through the long hole 20a is screwed into the machine frame. They are fastened together and fixed to the machine frame.
[0029]
  The bolt is loosened, the fixing portion 20 is released from the sewing machine frame, and the fastening member 33, which will be described in detail later, is loosened. Can be adjusted. By this adjustment, when the width between the pair of sewing needles 2 is changed by exchanging two needles, the position of the horizontal hook 4 can be set according to the width between the pair of sewing needles 2.
[0030]
  The pot base frame 10 has a receiving space 21 formed in a portion including the central portion thereof. At least a part of a hook mechanism (not shown) is received in the receiving space 21, and a horizontal pot linked to the hook mechanism is interlocked. 3 is disposed on the upper side of the pot base frame 10.
[0031]
  In addition, a horizontal hole 22 in the left-right direction is formed in the pot base frame 10 on the rear side of the accommodation space 21 in a penetrating manner, and a vertical hole 23 (attachment) that communicates with the rear portion of the horizontal hole 22 so as to wrap. (Corresponding to a hole) is formed in a penetrating shape. A so-called metal bearing member 7 (corresponding to a shaft-like member) is fitted into the horizontal hole 22, and a pinch sleeve 11 is fitted into the vertical hole 23, and the pinch sleeve 11 is fitted into the horizontal hole 22. The bearing member 7 is fixed.
[0032]
  A hook drive shaft 8 extending in the left-right direction is inserted into the bearing member 7 in an inner fitting manner and is rotatably supported. When the shuttle drive shaft 8 is rotationally driven by the sewing machine motor, the driving force is transmitted to the shuttle drive mechanism via a gear mechanism (not shown), and the horizontal shuttle 3 is rotationally driven by the shuttle drive mechanism. The horizontal hook 3 rotates and hooks the upper thread extending from the sewing needle 2 and entangles it with the lower thread to form a stitch.
[0033]
  The structure for fixing the bearing member 7 to the pot base frame 10 includes a first support portion 30 formed on the pot base frame 10 and supporting the peripheral surface portion of the bearing member 7, and a vertical hole 23 of the frame member 10. And the pinch sleeve 11 formed with the second support portions 31 and 32 for supporting the peripheral surface portion of the bearing member 7 from the side opposite to the first support portion 30, and the pinch sleeve 11 is tightened to surround the bearing member 7. A fastening member 33 for pressing and fastening the first and second support portions 30, 31, 32 to the surface, and a pinch sleeve 11 attached to the vertical hole 23 for fixing the bearing member 7 to the pot base frame 10. A pinch sleeve holding mechanism 12 is provided.
[0034]
  The 1st support part 30 is comprised by the near part which the vertical hole 23 communicates at least among the inner surfaces of the horizontal hole 22. FIG. As the pinch sleeve 11, a pair of upper and lower pinch sleeve members 40, 41 are provided. The pinch sleeve members 40, 41 are connected by a fastening member 33, and are relatively close to each other by the rotation of the fastening member 33.
[0035]
  For this purpose, a screw hole is formed in the pinch sleeve member 40, an insertion hole is formed in the pinch sleeve member 41, and the fastening member 33 is inserted into the pinch sleeve member 41 from below and screwed into the pinch sleeve member 40. ing. The pinch sleeve 11 has a pair of pinch sleeve members 40 and 41 formed with second support portions 31 and 32, and the second support portions 31 and 32 are substantially the same as the horizontal hole 22 in cross-section of the pinch sleeve 11. It is composed of a cut-out surface cut out in a circular arc shape with a diameter, and faces the horizontal hole 22 side.
[0036]
  The pinch sleeve holding mechanism 12 will be described. The pinch sleeve holding mechanism 12 isAs shown in FIGS. 4 and 5Of the pinch sleeve 11Of the pair of pinch sleeve members 40 and 41, the second support portions 31 and 32 on the opposite side of the fastening member 33 are sandwiched.A pair of upper and lower recesses 45a, 46a provided on the outer peripheral portion and the pinch sleeve 11 of the pot base frame 10Each of the pair of pinch sleeve members 40, 41Applicable to the outer peripheryMounting hole formation covering each outer peripheral partportion10aAnd a pair of upper and lower convex portions 45b and 46b respectively engaged with the pair of concave portions 45a and 46a.
[0037]
  Frame member 10Mounting hole forming portion 10aA pair of upper and lower screw members 45c, 46c are screwed together so as to be able to rotate in the horizontal direction from the outside, and the pair of protrusions are projected at the portions of the screw members 45c, 46c projecting to the vertical hole 23 side. Portions 45b and 46b are configured. Here, the concave portions 45a and 46a are slightly longer than the vertical lengths of the convex portions 45b and 46b so that each pinch sleeve member can move somewhat in the vertical direction in a state where the convex portions 45b and 46b are engaged with the concave portions 45a and 46a. It is long and long.
[0038]
  In addition, you may form the recessed parts 45a and 46a in the left-right length somewhat longer than the left-right length of the convex parts 45b and 46b. Thus, after the pinch sleeve 11 is fitted into the vertical hole 23, the screw members 45c and 46c are rotated to make it easy to engage the convex portions 45b and 46b, which are the tip portions, with the concave portions 45a and 46a of the pinch sleeve 11. be able to.
[0039]
  The operation and effect of the structure for fixing the bearing member 7 including the pinch sleeve holding mechanism 12 to the pot base frame 10 will be described. When assembling the pot base unit 5, before fixing the bearing member 7 to the pot base frame 10, the pinch sleeve 11 is fitted and attached to the vertical hole 23 to position the pinch sleeve 11 at a predetermined position.
[0040]
  When the pinch sleeve 11 is positioned at the predetermined position, the bearing member 7 can be fitted into the horizontal hole 22, and a pair of screw members is inserted into the pair of recesses 45 a and 46 a of the pinch sleeve 11. The convex parts 45b and 46b which are the front-end | tip parts of 45c and 46c can be engaged.
[0041]
  In this state, the pinch sleeve 11 is held by the pinch sleeve holding mechanism 12.Mounting hole forming portion 10aBy rotating the screw members 45c and 46c screwed to each other, the tip ends project toward the vertical hole 23 side, and the pair of convex portions 45b and 46b are engaged with the pair of concave portions 45a and 46a. The pinch sleeve 11 is held at a predetermined position in a state in which the pinch sleeve 11 is prevented from coming off and rotating.
[0042]
  Thereafter, when the bearing member 7 is fitted and fixed in the horizontal hole 22 of the pot base frame 10, the fastening member 33 is loosened, and the pair of pinch sleeve members 40, 41 of the pinch sleeve 11 are separated to some extent. In this state, the bearing member 7 is inserted between the first and second support portions 30, 31, 32, and then the fastening member 33 is rotated to bring the pair of pinch sleeve members 40, 41 closer to each other. The first and second support portions 30, 31 and 32 are pressed and fastened to the peripheral surface of the member 7.
[0043]
  In the pinch sleeve holding mechanism 12, recesses 45 a and 46 a are provided in the outer peripheral portion of the pinch sleeve 11, and correspond to the outer peripheral portion of the pinch sleeve 11 in the pot base frame 10.Mounting hole formationportion10aSince the convex portions 45b and 46b that engage with the concave portions 45a and 46a are provided in the pinch sleeve 11 with the simple structure, the pinch sleeve 11 can be securely held by being attached to the vertical hole 23 of the pot base frame 10. .
[0044]
  As a result, when the bearing member 7 is fixed to the frame member 10, the bearing member 7 is smoothly and reliably inserted into the horizontal hole 22 of the frame member 10 in a state where the pinch sleeve 11 is positioned at a predetermined position while preventing the pinch sleeve 11 from coming off. Can be assembled and fixed.
[0045]
  The pinch sleeve holding mechanism 12 may be removed after the bearing member 7 is fixed to the frame member 10, but this pinch sleeve holding mechanism 12 has a simple structure and interferes with other members and mechanisms. Since it does not become, it becomes possible to keep mounting | wearing as it is. Even when the bearing member 7 is removed from the pot base frame 10 for maintenance or the like, the pinch sleeve holding mechanism 12 can hold the pinch sleeve 11, so that the bearing member 7 is assembled and fixed to the frame member 10 again. In addition, the same actions and effects as described above can be obtained.
[0046]
  Of the frame member 10Mounting hole forming portion 10aThe screw members 45c and 46c are screwed together so as to be rotatable, and the projecting portions 45b and 46b are constituted by the screw members 45c and 46c. Therefore, the projecting portions 45b and 46b can be easily provided, By rotating 45c and 46c, the protrusions 45b and 46b at the tip of the screw members 45c and 46c can be easily engaged with or released from the recesses 45a and 46a. The pinch sleeve 11 can be easily attached to the vertical hole 23.
[0047]
  Since both of the pair of pinch sleeve members 40 and 41 of the pinch sleeve 11 are held by the pinch sleeve holding mechanism 12, the entire pinch sleeve 11 is securely held in the vertical hole 23 of the frame member 10 and is removed. It can be positioned at a predetermined position in a stopped and non-rotating state.
[0048]
  Next, a modified form will be described. However, the same components as those in the above embodiment are described with the same reference numerals.
1] As shown in FIG. 6, the pot base frame 10 is formed with a vertical hole 23 </ b> A (corresponding to a mounting portion) that communicates with the rear portion of the horizontal hole 22. The vertical hole 23A is a non-penetrating hole formed from the lower side of the pot base frame 10, and a pinch sleeve 11A is fitted into the vertical hole 23A.
[0049]
  30 A of 1st support parts are comprised by the near part to which the vertical hole 23A connects among the inner surfaces of the horizontal hole 22. FIG. One pinch sleeve member 50 is provided as the pinch sleeve 11A, and the pinch sleeve member 50 has a second support portion 31A configured by a cut-out surface that is cut in an arc shape having substantially the same diameter as the horizontal hole 22 in cross section. Is formed and faces the horizontal hole 22 side. The fastening member 33 is screwed into the frame member 10 through the pinch sleeve member 50.
[0050]
  The pinch sleeve holding mechanism 12A corresponds to a concave portion 51a provided on the outer peripheral portion of the pinch sleeve 11A and an outer peripheral portion of the pinch sleeve 11A in the pot base frame 10.Mounting hole formationportion10aAnd a convex portion 51b that engages with the concave portion 51a. A screw member 51c is screwed to the frame member 10 so as to be rotatable in the horizontal direction from the outside, and the protruding portion 51b is configured by a tip portion protruding to the vertical hole 23A side of the screw member 51c. .
[0051]
  With the fastening member 33 loosened, the bearing member 7 is fitted into the horizontal hole 22 and inserted between the first and second support portions 30A and 31A, and then the fastening member 33 is rotated to pinch sleeves. The first and second support portions 30A and 31A can be pressed and fastened to the peripheral surface of the bearing member 7 by tightening 11A.
[0052]
  By holding the pinch sleeve member 50 by the pinch sleeve holding mechanism 12A, the pinch sleeve member 50 can be positioned at a predetermined position while being prevented from coming off and rotating. Since the pinch sleeve 11A is prevented from coming off by the fastening member 33, the pinch sleeve holding mechanism 12A that can at least prevent the pinch sleeve 11A from rotating may be configured. When compared with the pinch sleeve holding mechanism 12, the pinch sleeve holding mechanism 12A can reduce the number of parts by omitting one of the pinch sleeve member and the screw member, and a recess corresponding to the omitted screw member. Therefore, the structure can be simplified and the manufacturing cost can be reduced.
[0053]
2] As shown in FIG. 7, a pair of upper and lower pinch sleeve members 40, 41 are provided as the pinch sleeve 11, and the pinch sleeve holding mechanism 12B corresponds to the outer peripheral portion of the pinch sleeve 11 in the pot base frame 10.Mounting hole formationportion10aA pair of upper and lower concave portions 60a and 61a provided on the outer periphery of the pinch sleeve 11 and a pair of upper and lower convex portions 60b and 61b that engage with the concave portions 60a and 61a.
[0054]
  The pair of recesses 60a and 61a is formed by making a horizontal through hole in the pot base frame 10. A pair of screw members 60c and 61c are screwed to the pair of pinch sleeve members 40 and 41 of the pinch sleeve 11, and the screw members 60c and 61c constitute convex portions 60b and 61b.
[0055]
3] As shown in FIG. 8, a pair of upper and lower pinch sleeve members 40, 41 are provided as the pinch sleeve 11, and the pinch sleeve holding mechanism 12C is provided with a pair of upper and lower concave portions 62a provided on the outer peripheral portion of the pinch sleeve 11. 63a, corresponding to the outer peripheral portion of the pinch sleeve 11 of the pot base frame 10Mounting hole formationportion10aAnd a pair of upper and lower convex portions 62b and 63b that engage with the concave portions 62a and 63a. A pair of upper and lower pin holes are formed in the left and right direction in the pot base frame 10, and a pair of pins 62c and 63c are press-fitted into the pin holes and fixed, and the vertical holes 23 of the pins 62c and 63c are fixed. Convex portions 62b and 63b are formed at the portion protruding to the side.
[0056]
4] As shown in FIG. 9, a pair of upper and lower pinch sleeve members 40, 41 are provided as the pinch sleeve 11, and the pinch sleeve holding mechanism 12D corresponds to the outer peripheral portion of the pinch sleeve 11 in the pot base frame 10.Mounting hole formationportion10aAnd a pair of upper and lower convex portions 64b and 65b which are provided on the outer peripheral portion of the pinch sleeve 11 and engage with the concave portions 64a and 65a. A pair of pin holes are formed in the pair of pinch sleeve members 40 and 41 of the pinch sleeve 11, and a pair of pins 64c and 65c are press-fitted into the pin holes and fixed, and the pins 64c and 65c are fixed. Thus, the convex portions 64b and 65b are configured.
[0057]
5] In the structure in which one pinch sleeve member 50 is provided as the pinch sleeve 11A shown in FIG. 6, a pinch sleeve holding mechanism as shown in FIGS. 7 to 9 may be employed. Moreover, it is good also as a pinch sleeve holding mechanism which combined the pinch sleeve holding mechanism of FIGS. 7-9 partially.
[0058]
6] When the bearing member is fixed to a frame member other than the pot base frame, or when the cylindrical shaft member other than the bearing member is fixed to the frame member, the shaft-shaped shaft member is fixed to the frame member. In this case, the pinch sleeve holding mechanism and the shaft-shaped member fixing structure of the present invention may be applied.
[0059]
  In addition, various modifications can be added and implemented without departing from the spirit of the present invention, and in various sewing machines other than the two-needle sewing machine or devices other than the sewing machine as in the above embodiment. The present invention is applicable when the shaft-like member is fixed to the frame member.
[0060]
【The invention's effect】
[0061]
[0062]
  According to the sewing machine of claim 1, the frame memberAxial or cylindricalForming a first support portion for supporting a peripheral surface portion of the shaft-shaped member;Perpendicular to the axial direction of the first supportA fixing member inserted through the formed mounting hole is formed with a second cylindrical support portion that supports the peripheral surface portion of the shaft-like member from the side opposite to the first support portion, and a fastening memberIs inserted and connected to the fixing member in the axial direction of the mounting hole.Tighten the fixing memberByThe first and second support portions can be pressed and fastened to the peripheral surface of the shaft-shaped member, and the shaft-shaped member can be fixed to the frame member. In order to fix the shaft-shaped member to the frame member,With a fastening memberSecond support partofCorresponds to the outer peripheral part of the opposite side and the outer peripheral part of the fixed member of the frame memberAnd cover this outer peripheryMounting hole formation partWhenA recess on one side of thethisThe outer periphery and the frame memberthisMounting hole formation partWhenSince the convex part which engages with the concave part is provided on the other side, the fixing member can be securely attached to the mounting part of the frame member by this simple structure, and when the shaft-like member is fixed to the frame member, the fixing member The shaft-shaped member can be smoothly and reliably assembled and fixed to the frame member in a state in which the shaft-shaped member is positioned at a predetermined position while being prevented from coming off and prevented from rotating, and the assembling work of the shaft-shaped member can be simplified.
[0063]
  According to the sewing machine of claim 2, the fastening member is a fastening member.InsertionSince a pair of fixing members that are connected and relatively moved apart from each other by the rotation of the fastening member are provided, the pair of fixing members are separated from each other to some extent by a shaft shape between the first and second support portions. After inserting the member, the fastening member is rotated to relatively approach the pair of fixing members, and the first and second support portions can be pressed and fastened to the peripheral surface of the shaft-like member. By holding at least one of the pair of fixing members with the holding mechanism, the entire fixing member can be held at the attachment portion of the frame member and positioned at a predetermined position in a state where it is prevented from coming off and rotating.
[0064]
  According to the sewing machine of claim 3, since one fixing member is provided as a fixing member and the fastening member is inserted through the fixing member and screwed into the frame member, After the shaft-like member is inserted between the second support portions, the fastening member is rotated to fasten the fixing member, and the first and second support portions can be pressed and fastened to the peripheral surface of the shaft-like member. By holding this fixing member by the holding mechanism, it can be positioned at a predetermined position while being prevented from coming off and rotating.
[0065]
  According to the sewing machine of the fourth aspect, since the screw member is screwed to the fixing member or the frame member so as to be rotatable, and the convex portion is configured by the screw member, the convex portion can be easily provided. By rotating the screw member, it is possible to easily engage or disengage the convex portion constituted by the screw member with the concave portion, and to easily attach the fixing member to the attachment portion of the frame member. Yes.
[Brief description of the drawings]
FIG. 1 is a perspective view in which a front half portion of a bed portion of a two-needle sewing machine according to an embodiment of the present invention is cut away.
FIG. 2 is a bottom view of the pot base unit.
FIG. 3 is a rear view of the pot base unit.
FIG. 4 is a perspective view of the pot base unit in a vertically cut state.
5 is a cross-sectional view taken along line VV in FIG.
6 is a diagram corresponding to FIG.
FIG. 7 is a view corresponding to FIG.
FIG. 8 is a view corresponding to FIG.
FIG. 9 is a view corresponding to FIG.
[Explanation of symbols]
M 2-needle sewing machine
7 Bearing members
10 Pot base frame
10a        Mounting hole formation part
11, 11A Pinch sleeve
12, 12A, 12B, 12C, 12D Pinch sleeve holding mechanism
23,23A Vertical hole
30, 30A first support part
31, 32, 31A second support part
33 Fastening member
40, 41, 50 Pinch sleeve member
45a, 46a, 51a, 60a, 61a, 62a, 63a, 64a, 65a Recess
45b, 46b, 51b, 60b, 61b, 62b, 63b, 64b, 65b
45c, 46c, 51c, 60c, 61c Screw member

Claims (4)

Formed in the frame member, the shaft-like or a first support portion for supporting the circumferential portion of the cylindrical shaft-like member, attached, which is vertically formed with respect to the axial direction of the first supporting portion to the frame member A fixing member formed with a partially cylindrical second support portion inserted through the hole and supporting the peripheral surface portion of the shaft-like member from the side opposite to the first support portion; and the axis of the mounting hole with respect to the fixing member is inserted connected to a direction, clamping first peripheral surface of the shaft-like member by Rukoto, in a sewing machine provided with a fastening member for the second supporting portion presses concluded,
A holding Organization for holding a fixing member attached in front Symbol mounting holes to secure the shaft-like member to the frame member to the frame member,
The holding mechanism includes a side opposite the outer peripheral portion of the second support portion across the fastening member of the fixing member, the outer peripheral portion and corresponds to the peripheral portion of the fixing member of said frame member A recessed portion provided on one side of the mounting hole forming portion to be covered ;
Sewing machine and having a convex portion engaged with the outer peripheral portion and the other said recess provided with the mounting hole forming portion of the frame member of the fixed member. As the fixing member, a pair of fixing members that are inserted and connected by the fastening member and relatively approached and separated by rotation of the fastening member are provided, and at least one of the pair of fixing members is held by the holding mechanism. The sewing machine according to claim 1, wherein the sewing machine is configured as described above.   The sewing machine according to claim 1, wherein one fixing member is provided as the fixing member, and the fastening member is inserted into the fixing member and screwed into the frame member.   The sewing machine according to any one of claims 1 to 3, wherein a screw member is screwed to the fixing member or the frame member so as to be rotatable, and the convex portion is constituted by the screw member.