JP2007021064A - Needle feed sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve workability when adjusting a position by enabling to adjust the position of a needle bar oscillating frame without using a plurality of spacers. <P>SOLUTION: This needle feed sewing machine is provided with a frame, and a needle bar oscillating frame supported oscillatably around a parallel shaft in parallel to a main spindle incorporated in the frame and oscillating along a part of the frame. An adjusting member is interposed between the part of the frame and the needle bar oscillating frame. The adjusting member can change the interval from the part of the frame to the needle bar oscillating frame. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a needle feed sewing machine, and more particularly to a needle feed sewing machine capable of adjusting the position of a needle bar swing base.

The needle feed sewing machine is provided with a needle bar swinging base that swings and supports a needle bar to which a sewing needle is fixed (see, for example, Patent Document 1). The sewing needle must fall to a predetermined position while swinging. However, since the variation occurs due to individual differences in sewing machines or individual differences in gauges, the dropping position of the sewing needle must be adjusted. In adjusting the drop position of the sewing needle, the position of the needle bar swing base is adjusted. For example, some needle bar rocking bases rub against a part of the frame when rocking, but a spacer is interposed between the rubbing part of the frame and the needle bar rocking base to set the initial setting. By replacing the spacer with a thickness that eliminates variation when changing the time or gauge, the position of the needle bar rocking base is changed to adjust the dropping position of the sewing needle.
Japanese Patent Laid-Open No. 7-112085

  However, with the adjustment as described above, it is necessary to prepare a plurality of spacers having different thicknesses, and furthermore, since each spacer is a separate body, there is a risk of loss.

  An object of the present invention is to improve the workability at the time of position adjustment by enabling the position adjustment of the needle bar rocking base without using a plurality of spacers.

The needle feed sewing machine according to the invention of claim 1 is:
Frame,
A needle bar swinging table that is supported swingably around a parallel axis parallel to the main shaft built in the frame and swings along a part of the frame;
An adjustment member interposed between a part of the frame and the needle bar swing base,
The adjusting member is characterized in that a distance from a part of the frame to the needle bar swinging table can be changed.

  According to the first aspect of the present invention, since the distance from a part of the frame to the needle bar rocking table is changed by the adjusting member, the needle bar rocking table and the frame can be used without using a plurality of spacers as in the prior art. Relative position adjustment can be performed. Accordingly, it is not necessary to prepare a plurality of spacers at the time of position adjustment, and the unused spacers are not lost.

The invention according to claim 2 is the needle feed sewing machine according to claim 1,
A part of the adjustment member that faces a part of the frame or a part that faces the needle bar swinging base is formed in a step shape.

  According to the second aspect of the present invention, since the portion of the adjustment member that opposes a part of the frame or the portion that opposes the needle bar swing base is formed in a stepped shape, the adjustment member has a thickness for each step. Will be different. That is, if the step interposed between a part of the frame and the needle bar swinging table is changed, the distance from a part of the frame to the needle bar swinging table can be changed.

The invention according to claim 3 is the needle feed sewing machine according to claim 1,
A surface of the adjustment member that faces a part of the frame and a surface that faces the needle bar rocking base are non-parallel.

  According to the third aspect of the present invention, since the surface of the adjustment member that faces part of the frame and the surface that faces the needle bar swinging base are non-parallel, the thickness of the adjustment member varies depending on the location. . That is, if the place interposed between a part of the frame and the needle bar rocking table is changed, the interval from a part of the frame to the needle bar rocking table can be changed.

According to a fourth aspect of the present invention, in the needle feed sewing machine according to the third aspect,
A part of the frame and a portion of the needle bar swinging table in contact with the adjustment member are formed so as to be parallel to the surfaces of the adjustment members facing each other.

  According to the fourth aspect of the present invention, a part of the frame and the portion of the needle bar rocking table that the adjustment member contacts are parallel to the surfaces of the adjustment members facing each other. The contact area of the adjustment member, the contact area of the needle bar swing base and the adjustment member can be increased as much as possible, and the fixing of the adjustment member can be stabilized.

The invention according to claim 5 is the needle feed sewing machine according to any one of claims 1 to 4,
A portion of the adjustment member that faces the needle bar swing base is formed with a female screw, and the needle bar swing base is formed with a through hole that communicates with the female screw.
The adjustment member is attached to the needle bar rocking base by a fixing screw screwed into the female screw through the through hole.

  For example, contrary to the invention described in claim 5, when the through hole is formed in the adjustment member and the female screw is formed in the needle bar rocking base, the screw head of the fixing screw is fixed to the frame of the adjustment member. It will be placed on some side. In this state, the fixing head cannot be loosened because the screw head is not exposed. For this reason, when the adjustment member is moved, it is necessary to remove the needle bar swinging base from the frame to expose the screw head. However, as in the fifth aspect of the present invention, a female screw is formed in a portion of the adjustment member that faces the needle bar rocking base, and the needle bar rocking base has a through hole that communicates with the female screw. If the adjusting screw is screwed into the female screw through this through hole and the adjusting member is attached to the needle bar rocking base, the screw head of the fixing screw is always exposed. The fixing screw can be removed from the female screw without removing the swing base. Therefore, the workability of position adjustment can be improved.

Invention of Claim 6 is the needle feed sewing machine as described in any one of Claims 1-4,
The adjusting member is attached to a part of the frame so that the position is adjusted along a direction orthogonal to the axial direction of the main shaft.

  According to the invention described in claim 6, since the adjustment member is attached to a part of the frame so that the position is adjusted along the direction orthogonal to the axial direction of the main shaft, the position adjustment is performed on the frame side. It can be carried out.

The invention according to claim 7 is the needle feed sewing machine according to claim 1,
The adjusting member is characterized in that it can be moved in and out of a part of the frame or the needle bar swinging base.

  According to the seventh aspect of the present invention, since the adjusting member is installed on a part of the frame or the needle bar swinging base so as to be able to appear and retract, if the amount of protrusion of the adjusting member is changed, the needle bar is changed from a part of the frame. The distance to the swing table can be changed.

  According to the present invention, by using an adjustment member that can freely change the distance from a part of the frame to the needle bar oscillating table, the needle bar oscillating table and the needle bar oscillating table can be used without using a plurality of spacers having different thicknesses as in the prior art. Position adjustment relative to the frame can be performed. Thereby, it is not necessary to consider the trouble of preparing a plurality of spacers, the loss of spacers, etc., and the workability of position adjustment can be improved.

  Hereinafter, the needle feed sewing machine according to the present embodiment will be described with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration of a needle feed sewing machine. As shown in FIG. 1, the needle feed sewing machine 1 is provided with a frame 2 that forms its outer shape, and a needle feed mechanism 4 that is built in the frame 2 and swings up and down by swinging the sewing needle 3 back and forth. .

  The needle feed mechanism 4 includes a needle bar swing base 32 that supports a needle bar 31 to which the sewing needle 3 is fixed, a lift mechanism 5 that lifts and lowers the needle 3 by moving the needle bar 31 up and down, and a needle bar swing base. A swing mechanism 6 that swings the sewing needle 3 by swinging 32 is provided.

  The elevating mechanism 5 includes a motor 51 serving as a drive source, a main shaft 52 extending in the left-right direction and driven to rotate by the motor 51, a rotating body 53 connected to the main shaft 52 and rotated, and the rotating body 53. A link body 54 whose one end is connected at a position decentered from the rotation center, and a connection body 55 for connecting the other end of the link body 54 to the needle bar 31 are provided. That is, when the motor 51 is driven and the main shaft 52 is rotationally driven, the rotating body 53, the link body 54, and the connecting body 55 cause the rotating operation to be raised and lowered, and the needle bar 31 is raised and lowered.

  The swing mechanism 6 includes a first parallel shaft 61 that is parallel to the main shaft 52 and connected to the upper end of the needle bar swing base 32, and a second parallel shaft that is disposed in parallel below the first parallel shaft 61. 62, a swing arm 63 connected to one end of the second parallel shaft 62 and the lower portion of the needle bar swing base 32, and the other end of the second parallel shaft 62 for rotating the second parallel shaft 62 The first link member 64 connected to the shaft, the shaft 65 having one end rotatably connected to the first link member 64, and the shaft 65 moved up and down to rotate the first link member 64. For this purpose, a second link member 66 rotatably connected to the other end of the shaft 65 and a rotation motor (not shown) for driving the rotation shaft 67 of the second link member 66 are provided. That is, when the rotary motor is driven, the second link member 66 is rotated about the rotary shaft 67 and the shaft 65 is moved up and down. The vertical movement of the shaft 65 is transmitted to the second parallel shaft 62 via the first link member 64, and the second parallel shaft 62 is rotated. In conjunction with this, the swing arm 63 is moved to the needle bar. The needle bar 31 swings by swinging the swing base 32.

  FIG. 2 is a front view showing the needle bar rocking base 32. In FIG. 2, the connecting body 55 of the lifting mechanism 5 is omitted. As shown in FIG. 2, a part of the frame 2 protrudes in the vicinity of the lower part of the needle bar swinging table 32, and the needle bar swinging table 32 is formed on the distal end surface 22 of a part of the frame 2 (guide portion 21). It swings along the way. A first connecting portion 33 to which the first parallel shaft 61 is connected is provided at the upper end portion of the needle bar swing base 32, and a swing arm 63 is connected to the lower portion of the needle bar swing base 32. A second connecting portion 34 is provided. In addition, an adjustment member 7 interposed between the guide portion 21 of the frame 2 and the needle bar swing base 32 is fixed below the second connecting portion 34.

FIG. 3 is a perspective view illustrating a schematic configuration of the adjustment member 7, and FIG. 4A is a cross-sectional view of the adjustment member 7. As shown in FIGS. 3 and 4A, the portion of the adjustment member 7 that faces the guide portion 21 is formed in a step shape. The adjustment member 7 may have any number of steps, and in the present embodiment, a case where there are three steps will be described as an example. In each step of the adjustment member 7, a pair of through holes 71 into which a fixing screw made of a countersunk screw is inserted are formed along the horizontal direction. One end portion of the through hole 71 is formed in a tapered shape so that the screw head of the fixing screw is accommodated in the adjustment member 7. On the other hand, a pair of female screws is formed at a portion of the needle bar swinging base 32 where the adjustment member 7 is fixed. That is, after the pair of through holes 71 at any stage of the adjusting member 7 and the pair of female screws of the needle bar swinging base 32 are combined and communicated, the fixing screw is moved through the through hole 71. The adjustment member 7 is fixed to the needle bar swinging table 32 by being screwed into the female screw of the moving table 32. For example, when a fixing screw is inserted in the second stage of the adjustment member 7 and is fixed to the needle bar rocking base 32, the guide portion 21 of the frame 2 and the needle bar rocking base 32 are shown in FIG. Is the thickness of the second stage of the adjustment member 7. That is, when the adjustment member 7 is fixed to the needle bar rocking base 32, the gap between the guide portion 21 of the frame 2 and the needle bar rocking base 32 is changed by changing the step where the fixing screw is inserted. It is like that.
In order to equalize the length of the fixing screw inserted into each through hole, the through hole 71a may be provided at a position where the adjusting member 7B is dug like the adjusting member 7B shown in FIG. Alternatively, the female screw of the needle bar rocking base 32 may be formed deeper than the male screw portion of the fixing screw. Thus, if the length of the fixing screw inserted into each through hole can be made uniform, the fixing screw itself can be made common, and as a result, the possibility of losing the fixing screw can be reduced.

Next, the operation of this embodiment will be described.
Under normal conditions, since the screw head of the fixing screw is covered with the guide portion 21 of the frame 2, the fixing screw cannot be loosened. For this reason, when the position of the needle bar swing base 32 is adjusted, the operator removes the needle bar swing base 32 from the first parallel shaft 61 and the swing arm 63 to expose the screw head of the fixing screw. When the screw head is exposed, the operator removes the fixing screw from the needle bar rocking base 32 and the adjusting member 7 so that the adjusting member 7 and the needle bar rocking base 32 can move relatively. Then, the adjustment member 7 is fixed to the needle bar rocking table 32 after the steps of the adjustment member 7 are changed so that the distance between the guide portion 21 of the frame 2 and the needle bar rocking table 32 becomes a desired distance. .

  Thereafter, the operator attaches the needle bar swing base 32 to the first parallel shaft 61 and the swing arm 63. At this time, since the positions of the first parallel shaft 61 and the swing arm 32 are shifted in accordance with the position adjustment, the operator also adjusts these positions to complete the position adjustment.

  As described above, according to the needle feed sewing machine 1 of the present embodiment, the distance from the guide portion 21 of the frame 2 to the needle bar swinging base 32 is changed by the adjustment member 7, so that a plurality of spacers can be provided as in the conventional case. Even if it is not used, the relative position adjustment between the needle bar swing base 32 and the frame 2 can be performed. Accordingly, it is not necessary to prepare a plurality of spacers at the time of position adjustment, and the unused spacers are not lost. Thereby, it is not necessary to consider the trouble of preparing a plurality of spacers, the loss of spacers, etc., and the workability of position adjustment can be improved.

It goes without saying that the present invention is not limited to the above embodiment and can be modified as appropriate. In the following description, the same parts as those in the present embodiment are denoted by the same reference numerals and the description thereof is omitted.
For example, in this embodiment, when the adjustment member 7 is fixed to the needle bar rocking base 32, the fixing screw is screwed into the female screw of the needle bar rocking base 32 through the through hole 71 of the adjustment member 7. However, it is also possible to fix the fixing screw by screwing it onto the adjusting member 7 via the needle bar rocking base 32. Specifically, as shown in FIG. 5, a female screw 72 is formed in a portion of the adjustment member 7 </ b> A facing the needle bar rocking base 32, and the needle bar rocking base 32 has a through hole communicating with the female screw 72. And is attached to the needle bar rocking base 32 with a fixing screw that is screwed into the female screw 72 through the through hole of the needle bar rocking base 32. In this way, the screw head of the fixing screw is always exposed to the machine surface side (left side) on the side surface of the needle bar swinging base 32, so that the fixing screw can be attached without removing the needle bar swinging base 32. It can be removed from the female screw 72. Therefore, the workability of position adjustment can be improved.

Further, in the present embodiment, the case where the adjustment member 7 is fixed to the needle bar swing base 32 is described, but the adjustment member 7B may be fixed to the guide portion 21A of the frame 2. Specifically, as shown in FIG. 6, a portion of the adjustment member 7B that faces the needle bar swing base 32 is formed in a step shape, and a portion that faces the guide portion 21A is formed in a planar shape. A groove 24 is provided in the guide portion 21 </ b> A of the frame 2 along a direction (vertical direction) orthogonal to the axial direction of the main shaft 52. The width of the groove 24 is set slightly larger than the width of the adjusting member 7B so that the adjusting member 7B is inserted. The guide portion 21A is provided with a screw 73 for fastening the adjustment member 7B disposed in the groove 24. On the other hand, a contact portion 35 that contacts the surface of one step of the adjustment member 7B protrudes from the needle bar swinging base 32A.
At the time of position adjustment, if the screw 73 is loosened and the adjustment member 7B is moved in the vertical direction, the step contacting the contact portion 35 of the needle bar swinging base 32A will be different, and the needle bar swinging will be different. The distance between the base 32A and the guide portion 21A of the frame 2 can be adjusted.

Even if the adjustment member 7 does not have a stepped shape, the needle bar extends from the guide part 21 of the frame 2 even if the surface facing the guide part 21A and the surface facing the needle bar rocking base 32 are formed non-parallel. The distance to the oscillating table 32 can be changed freely. Specifically, for example, as shown in FIG. 7, if the surface 76 facing the needle bar rocking base 32 is inclined with respect to the surface 75 facing the guide portion 21 </ b> A of the adjustment member 7 </ b> C, the adjustment member 7 </ b> C The thickness will vary from place to place. That is, if the place interposed between the guide portion 21A of the frame 2 and the needle bar swing base 32A is changed, the distance from the guide portion 21A of the frame 2 to the needle bar swing base 32A can be changed.
In this case, the portion of the frame 2 where the guide member 21A and the needle bar rocking base 32A are in contact with the adjusting member 7C is formed to be parallel to the surfaces 75 and 76 of the adjusting member 7C facing each other. It is preferable. Accordingly, the contact area between the guide portion 21A and the adjustment member 7C of the frame 2 and the contact area between the needle bar swing base 32A and the adjustment member 7C can be increased as much as possible, and the fixing of the adjustment member 7C can be stabilized. it can.

  Further, the adjustment member 7D is installed on the guide portion 21B of the frame 2 or the needle bar swinging base 32A so that the adjustment member 7D can be moved in and out, thereby changing the protruding amount of the adjustment member 7D, from the guide portion 21B to the needle bar swinging base 32A. It is also possible to change the interval. Specifically, for example, as shown in FIG. 8, the adjustment member 7 </ b> D is formed to have a rectangular shape in side view. Further, a guide hole 27 along the left-right direction is formed in the guide portion 21B of the frame 2 so as to have a slightly larger shape than the adjustment member 7D in order to allow the adjustment member 7D to protrude and retract. The guide portion 21B is provided with a screw 78 for fastening the adjusting member 7D disposed in the guide hole 27. If the screw 78 is loosened, the adjustment member 7D can be protruded and retracted from the guide portion 21B, and the distance between the needle bar swinging base 32A and the guide portion 21B of the frame 2 can be adjusted. After the adjustment, if the screw 78 is tightened, it is fixed at the interval.

It is a perspective view showing schematic structure of the needle feed sewing machine concerning the present invention. FIG. 2 is a front view illustrating a needle bar rocking base and an adjustment member provided in the needle feed sewing machine of FIG. 1. FIG. 3 is a perspective view illustrating a schematic configuration of an adjustment member in FIG. 2. It is sectional drawing of the adjustment member of FIG. It is sectional drawing showing the modification of the adjustment member of FIG. It is a front view showing the modification of the needle bar rocking | fluctuation base and adjustment member of FIG. It is a front view showing the modification of the needle bar rocking | fluctuation base and adjustment member of FIG. It is a front view showing the modification of the needle bar rocking | fluctuation base and adjustment member of FIG.

Explanation of symbols

1 Needle feed sewing machine 2 Frame 7 Adjustment member 21 Guide part (part of frame)
32 Needle bar swing base 52 Spindle 61 First parallel axis (parallel axis)
72 Female thread

Claims (7)

Frame,
A needle bar swinging table that is supported swingably around a parallel axis parallel to the main shaft built in the frame and swings along a part of the frame;
An adjustment member interposed between a part of the frame and the needle bar swing base,
The needle feed sewing machine according to claim 1, wherein the adjustment member can freely change a distance from a part of the frame to the needle bar swinging base. The needle feed sewing machine according to claim 1,
The needle feed sewing machine according to claim 1, wherein a portion of the adjustment member facing a part of the frame or a portion facing the needle bar swinging base is formed in a step shape. The needle feed sewing machine according to claim 1,
The needle feed sewing machine according to claim 1, wherein a surface of the adjusting member facing a part of the frame and a surface facing the needle bar swinging base are non-parallel. In the needle feed sewing machine according to claim 3,
A part of the frame and a portion of the needle bar rocking base where the adjustment member comes into contact are formed so as to be parallel to the surface of the adjustment member facing each other. In the needle feed sewing machine according to any one of claims 1 to 4,
A portion of the adjustment member that faces the needle bar swing base is formed with a female screw, and the needle bar swing base is formed with a through hole that communicates with the female screw.
The needle feed sewing machine, wherein the adjustment member is attached to the needle bar rocking base by a fixing screw that is screwed into the female screw through the through hole. In the needle feed sewing machine according to any one of claims 1 to 4,
The needle feed sewing machine, wherein the adjustment member is attached to a part of the frame so that the position thereof is adjusted along a direction orthogonal to the axial direction of the main shaft. The needle feed sewing machine according to claim 1,
The needle feed sewing machine according to claim 1, wherein the adjustment member is installed in a part of the frame or on the needle bar swinging base so as to be able to appear and retract.

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