JP2006081636A - High post bed type sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary high post bed type sewing machine which enables the replacement of the post part alone. <P>SOLUTION: The conventional post is divided into the posts A and B and the post B is separable to be replaced with the one different in shape. A mechanism of the post A is provided on the lower shaft at the lower part of the bottom plate and the lower shaft which originally rotates horizontally shifts to the vertical rotation in conversion with a gear. Moreover, the horizontal rotation mechanism within the post A is converted to the horizontal rotation mechanism. The post B is a unit with a rotary part and allows the separation and the replacement thereof. Thus, the combination of the reference shaft and a recessed tank and an eccentric shaft and a fork plate facilitates the replacement of the post B with the post different in shape. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    The present invention relates to a high post-bed type sewing machine, and more particularly to a high post-bed type sewing machine that can be easily replaced with a post that matches the shape of the sewn product and that makes it easier to replace the post that matches the shape of the sewn product.

    A conventional rotary post bed type sewing machine employs a post mechanism having a suitable shape as shown in FIG. 1 in accordance with various sewing bags. The needle plate seat body 13 includes a rotating portion inside and a fixed needle plate 14 on a side surface, is supported by the post 12, and can freely rotate around a rotation axis.

    The installation seat 10 is installed on the axis of the rotating part and is used to support the “U” -shaped post 12. The installation seat 10 can freely rotate the “U” -shaped post 12. In order to convert the rotational movement of the shaft, which is not shown in the figure, into vertical movement, a gear 27 is provided therein, which transmits this rotation to the rotating part. However, since the “U” -shaped parts of the various posts are all made up of an integrated structure, it can only be used as an independent sewing machine, and whenever the sewing process is changed or the type of sewing is changed Each time a change is made, a sewing machine suitable for each sewing product must be prepared, and the number of items that are not used increases, and time and labor are required for replacement.

    In the conventional rotary high post bed type sewing machine described above, when the post portion is replaced with a post portion having another shape, the entire structure including the installation seat 10 must be replaced.

    Further, since the volume of these rotary post bed type sewing machines is larger than that of a general post bed type sewing machine, time and labor are required for replacement, resulting in lack of economic efficiency.

    An object of the present invention is to provide a rotary high post bed type sewing machine that can replace only a post portion without having to push down the sewing machine.

    The rotary post of the present invention divides the post into a post A and a post B, and the post A supports the rotational motion transmitted from the lower shaft, and is a horizontal post that is composed using a right angle conversion motion mechanism. The post B is a post unit that is configured to support a rotation transmission mechanism to the rotating part.

    In the assembly of the unitized post, a reference shaft and a bifurcated portion are provided on the drive shaft of each post, and as soon as both are assembled, the two post units are assembled at an accurate position.

    Due to the structure in which this post is divided into two parts, the post A and the post B, the rotary high post bed type sewing machine of the present invention can easily replace the post and improve the economic efficiency. Can do.

    The structure, apparatus, and features of the present invention will be described below in detail with reference to specific embodiments and drawings.

    As shown in FIGS. 2 to 8, in the high post bed type sewing machine of the present invention, the main body head 1 includes a needle bar 7 mechanism, a presser raising mechanism, a balance mechanism, a forward / reverse sewing conversion mechanism, a stitch adjustment mechanism, and the like. The main body head 1 is fixed above the bottom plate 9, and the height of the main body head 1 is fixed by the cylindrical portion 8.

    A shaft 26 that can freely rotate is installed inside the installation seat 10, the installation seat 10 is installed above the bottom plate 9, a post A 11 ′ is installed above the installation seat 10, and the shaft 26 Is fixed inside the post A11 ′.

    A lower rotary drive shaft 28 is installed inside the post A11 ′, and a gear 27 is fixed to the bottom of the lower rotary drive shaft 28. The gear 27 freely rotates about the gear 37, and the gear 37 is a shaft. The gear 27 is installed at the center of the shaft 26 and can freely rotate, and the gear 27 converts the rotational motion of the lower shaft not shown in the figure into vertical motion.

    The rotation of the gear 37 is limited by combining the shaft 31 fixed to the installation seat 10 and the bifurcated portion of the reverse rotation stopper 30 with each other.

    An installation base 15 is provided inside the post A11 ′, and a bearing 40 is installed inside the installation base 15, and a positioning gear 38 that can freely rotate is installed on the bearing 40, and the positioning gear 38 is provided. Meshes with the gear 37, and one end of the positioning gear 38 is fixed by a positioning projection 46 perpendicular to the axial direction and a connecting head A41.

    Another bearing 44 is provided on the installation base 15 inside the post A11 ′, and a rotary drive gear 42 that is freely rotatable is provided in the middle of the bearing 44. The rotary drive gear is driven by a shaft not shown in the drawing. The rotary drive gear 42 meshes with the gear of the lower rotary drive shaft 28, and one end of the rotary drive gear 42 is fixed by a positioning projection 47 and a connecting head A45 perpendicular to the axial direction.

    A reference shaft 18 is provided above the installation pedestal 15, the reference shaft 18 is fixed on the installation pedestal 15 by a shaft screw 17, and the reference shaft 18 is installed to match the eccentric position on the axis of the bearing 44. The

    A bearing 50 is provided inside the post B12 ′, and a freely rotatable ball connecting head B48 is provided in the middle of the bearing 50. The ball connecting head B48 includes an axially recessed tub 19 at its front end, and its appearance Is a ball-shaped shaft, and the ball connection head B48 is assembled with the connection head A41, and movement in the axial direction is restricted by the fixing rings 49 and 51.

    The connecting head 52 is fixed to the shaft end of the ball connecting head B48, and the connecting head 53 is installed in the middle of the bearing 57 inside the post B12 ′ and freely rotates, so that the ball connecting head B48 rotates. The transmission is transmitted to the connection head 54, the connection head 54 is fixed to the shaft 55, the movement of the shaft 55 in the axial direction is restricted by the fixing rings 56, 58, and the screw bevel gear 59 is fixed to one end of the shaft 55.

    The drive shaft 73 is installed in the middle of the upper and lower bearings 77 and 74 inside the post B12 ′, can freely rotate, and the axial movement is restricted by the fixing rings 75 and 76, and the screw bevel gear at the lower end 72 and the screw bevel gear 59 are engaged with each other, and the screw bevel gear 78 at the upper end is fixed.

    The upper drive shaft 87 is installed in the middle of the bearings 88 and 95 inside the post B12 ′ and can freely rotate. The upper drive shaft 87 is restricted from moving in the axial direction by the fixing rings 91 and 92, and is screwed. The bevel gear 86 is fixed to one end, and the connection head F96 is fixed to the other end.

    The gear 103 is installed in the middle of the bearing 99 and can freely rotate. The bearing 99 is installed on the bearing installation seat inside the post B 12 ′, and the connection head 98 is installed on the gear 103.

    The rotational movement of the upper drive shaft 87 is transmitted to the gear 103 via the connecting head 97.

    The gear 116 and the gear 103 are meshed with each other.

    The bearing 112 is fixed in the middle of the rotary shaft seat 111, and the protruding portion is fixed by a screw and a needle plate seat 13 provided with a needle plate 14 on the side surface. Can rotate freely as a center.

    Similar to the ball connection head B48, the ball connection head B60 is provided with an axially recessed tank and is a ball-shaped connection head. The ball connection head B60 is installed in the middle of the shaft 62 inside the post B12 ′. It can be freely rotated, and the movement of the drive shaft in the axial direction is restricted by the fixing rings 61 and 63, and the connecting head 64 is installed at one end.

    The drive shaft 70 is installed in the middle of the bearing 68 inside the post B 12 ′ and can freely rotate, and the movement of the drive shaft in the axial direction is limited by the fixing rings 67 and 69. The connection head 66 is installed at one end, and the screw bevel gear 71 is installed at the other end, and the rotational movement of the ball connection head B 60 is transmitted to the drive shaft 70 via the connection head 65.

    The drive shaft 80 is installed in the middle of the bearings 81, 84 and can freely rotate. The bearings 81, 84 are installed inside the post B 12 ′, and the drive shaft 80 is supported by the fixing rings 82, 83. A screw bevel gear 79 is provided at one end of the drive shaft 80 and meshes with the screw bevel gear 71 and meshes with the screw bevel gear 104 at another end of the drive shaft 80. A screw bevel gear 85 is installed.

    The drive shaft 107 is installed in the middle of the bearings 105 and 109 and can freely rotate. The bearings 105 and 109 are installed in the installation seats 89 and 100 in the post B12 ′ and are fixed by the fixing rings 106 and 108. The axial movement is limited, the screw bevel gear 104 is installed at one end of the drive shaft 107, and the gear 110 is installed at the other end.

    The upper rotary drive shaft 113 is installed in the middle of the rotary shaft bearing 112 and can freely rotate. The upper rotary drive shaft 113 is assembled with the gear 110, and the rotating portion 115 is installed at the upper end.

    The rotary shaft seat body 111 is installed inside the post B12 'so as to coincide with the axial center position of the lower rotary drive shaft 28.

    The eccentric shaft 22 is installed below one side of the post A11 ′ and is integrated with the bifurcated plate 20 below the post B12 ′. The eccentric shaft 22 and the bifurcated plate 20 are connected to the reference shaft 18. The positional relationship at the time of assembly is arranged so that A <B as shown in FIG.

    The screws 24 and 25 are used for assembling the post A11 'and the post B12'.

    The operation of the rotary high post bed type sewing machine of the present invention will be described below. The rotation of the lower shaft, not shown in the drawing, is changed in the vertical direction at a rotation ratio of 1: 1 by the gear 27 of the lower rotation drive shaft 28 and the rotation drive gear 42 through the gear 27, and further the axial direction. After passing through the connecting head A45 and the ball connecting head B60 that can be separated or assembled, the direction is changed at a rotation ratio of 1: 1 using the screw bevel gears 71 and 79, and further, the screw bevel gears 85 and 104 are used. After the direction is changed at a rotation ratio of 1: 1, the rotational motion is transmitted to the gear 110 and the upper rotation drive shaft 113, and the direction is changed at the rotation ratio of 1: 1 and transmitted to the rotating unit 115.

    The assembled post A11 ′ and post B12 ′ rotate about the axis 26, and the rotation of the post A11 ′ and post B12 ′ causes the gear 38 meshed on the gear 37 to rotate, and the parallel shaft The rotating direction is changed by the connecting head A41, the ball connecting head B48 and the screw bevel gears 59 and 72 having a rotation ratio of 1: 1, which can be separated or assembled, and the screw bevel gears 78 and 86 having a rotation ratio of 1: 1. , The rotational motion is transmitted to the gear 103.

The shape of the gear 103 and the gear 38 described above are the same, and the shape of the gear 37 and the gear 116 are the same, so that the direction of the needle plate seat 13 and the needle plate 14 can be kept at the same position.
When the screws 24 and 25 for joining located under the post A11 ′ are removed and the post B12 ′ is moved along the post A11 ′, the ball connecting heads B48 and 60 are disengaged from the connecting heads A41 and 45, and the rotational motion is stopped simultaneously. Is done.

    In assembling the post part, it is necessary to set the direction of the post B12 ′ so that the positioning projections 46, 47 of the connection heads A41, 45 and the two parts of the ball connection heads B48, 60 can be joined to each other. As shown in FIG. 4, the direction of the bifurcated portions of the coupling heads B48, 60 and the positioning protrusions 46, 47 correspond to each other, and as shown in FIG. 4, the post A11 ′ slides and guides the post B12 ′ toward the left side. .

    Then, the reference shaft 18 and the recessed tank 19 are joined, and the post B12 'is continuously slid, so that the eccentric shaft 22 and the bifurcated plate 20 set to A <B (shown in FIG. 4) are joined to each other. At the same time, since the front ends of the ball connecting heads B48, 60 are ball-shaped, the connecting head A41 and the ball connecting head B48 and the connecting head A45 and the ball connecting head B60 are easily joined, and when the post part is separated or assembled, The left-right alignment position of the rotating part is finely adjusted by the rotation of the eccentric shaft 22.

    Based on the present invention described above, after dividing the drive shaft, rotation is transmitted by the connection head of the concave tub that has the appearance of a ball, so that the post with the conventional integrated structure can be separated, and The drive unit can be easily assembled even during assembly.

    Furthermore, only the post part can be replaced, and the post part can be installed without pushing down the sewing machine. This saves time and labor and improves the work efficiency. Further, the unitization of the post part greatly reduces the cost burden on the sewing company.

It is a top view which shows the structure with which the sewing machine main body and the post part by the prior art were united. It is a top view which shows the sewing machine with which the post part of this invention became the division structure. It is a structural diagram of the drive mechanism of the present invention. FIG. 3 is a structural diagram showing separation of the present invention. FIG. 3 is a structural diagram showing an assembled state of the connection head of the present invention. It is a structural diagram which shows the state which the connection head of this invention is not assembled. It is a three-dimensional perspective view of the Example of this invention. 1 is a structural diagram of an embodiment of the present invention.

Explanation of symbols

1 Body head 4 Belt feed 7 Needle bar 8 Tube 9 Bottom plate 10 Installation seat 11 'Post A
12 Post 12 'Post B
13 Needle plate seat 14 Needle plate 15 Installation base 17 Shaft screw
18 Reference shaft 19 Dent tank 20 Baffle plate 22 Eccentric shaft 24, 25 Screw 26 Shaft 27, 37, 38, 103, 110 Gear 28 Lower rotation drive shaft 30 Reverse rotation stopper 31 Shaft 40, 44, 74, 77, 81, 84, 88, 95, 99, 105, 109, 112 Bearing 41, 45 Connection head A
42 Rotation drive gears 46, 47 Positioning projections 48, 60 Ball connection head B
49, 51, 56, 58, 75, 76, 82, 83, 91, 92, 106, 108 Fixing ring 52, 53, 54 Connection head 55 Shaft 59, 71, 72, 78, 79, 85, 86, 104 Screw Bevel gears 73, 80, 107 Drive shaft 87 Upper drive shaft 89, 100 Installation seat 96 Connection head F
98 Connection head 111 Rotating shaft seat body 113 Upper rotation driving shaft
115 Rotating part

Claims (2)

It is a high post bed type sewing machine, which is provided with a post A above the installation seat, a post B at one end of the post A, and a reference axis and an eccentric shaft at the top and bottom of one side of the post A, respectively. And a recessed tank and a forked plate are respectively provided at the upper and bottom portions of the bottom of the post B, the recessed tank and the reference axis correspond to each other, and the forked plate and the eccentric shaft correspond to each other. High post bed type sewing machine. Among the above, an axially recessed tub, a ball-shaped shaft, a hole joined to the shaft, and a shaft provided with a positioning projection perpendicular to the axial direction are provided at the front end of the post B, respectively. The high post bed type sewing machine according to claim 1, wherein the sewing machine is joined and separated.

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