JP2000342876A - Sewing machine frame of multi-head type sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to suppress vibration with a simple structure. SOLUTION: The sewing machine frame 1 of this multi-head type sewing machine has a pair of struts 2 which are laterally arranged apart a spacing and stand on a floor surface, an upper frame 3 which is fixed in the state of being spanned between the high parts of both struts 2 and is used for mounting a sewing machine head, a first lower frame 4 which is fixed in the state of being spanned between the medium parts of both struts 2 and is used for mounting a bed and a second lower frame 5 which is fixed in the state of being spanned between the low parts of both struts 2 and is used for enhancing the rigidity of the sewing machine frame 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine frame suitable for a multi-head sewing machine.

[0002]

2. Description of the Related Art In order to suppress vibration of a sewing machine frame caused by driving of a needle and a shuttle during sewing, it is necessary to increase rigidity of the sewing machine frame. However, simply adding a reinforcing steel material to each part of the sewing machine frame causes problems such as a complicated structure of the sewing machine frame and an increase in weight.

Therefore, a sewing machine frame disclosed in, for example, Japanese Patent Application Laid-Open No. 9-94367 has been proposed. FIG.
As shown in FIG. 7, the sewing machine frame 50 includes a pair of bases 51 arranged on a floor 59 at intervals in a length direction, and a pair of columns respectively erected on the upper surfaces of the bases 51. 52 are provided. Needle 5
And a lower rigid frame 54 for attaching a bed (kettle base) 58 having a built-in shuttle (not shown) below the upper frame 53. And are spanned. The upper frame 53 is fixed to the upper end surface of the column 52, and the lower frame 54 has both ends of the column 5.
2 fixed to the middle and high section. On the rear side of the two supports 52, a base 51 and a support 52, and an auxiliary support 55 for further strengthening the connection between the support 52 and the upper frame 53 are provided.

[0004]

However, an upper frame 53 and a lower frame 54 are provided at a position higher than the middle height of the sewing machine frame 50, and a plurality of sewing heads 57 and a bed are provided on the upper frame 53 and the lower frame 54. Since each of the 58 is attached, the center of gravity is biased above the sewing machine frame 50, so that there is a problem that the weight balance is poor and the stability of the sewing machine is low.

Further, since the center of gravity is deviated upward away from the floor 59 and the sewing head 57 and the bed 58 as vibration sources are mounted on the upper portion of the sewing machine frame 50, There is also a problem that the upper part of 50 is easily vibrated with respect to the floor 59.

An object of the present invention is to solve the above-mentioned problems and to provide a sewing machine frame of a multi-head sewing machine capable of suppressing vibration with a simple structure.

[0007]

In order to achieve the above object, a sewing machine frame of a multi-head sewing machine according to the present invention comprises a pair of floor-standing struts arranged on the left and right spaced apart from each other, and a pair of the struts. An upper frame for fixing the sewing machine head fixed in a state of being bridged over a high portion, and a first lower frame for fixing a bed fixed in a state of being bridged between the middle and high portions of the two columns. And a second lower frame fixed to the lower portions of the two columns so as to increase the rigidity of the sewing machine frame.

[0008] A mode in which an intermediate support portion for supporting an intermediate portion in the length direction of the second lower frame to the floor surface is provided can be exemplified.

The pillars may be provided, for example, on the upper surface of a base extending in the front-rear direction and disposed on the floor surface at intervals on the left and right.

[0010] The intermediate support portion may be a base extending on the floor and extending in the front-rear direction.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 show a sewing machine frame of a multi-head sewing machine for a cylindrical work cloth according to a first embodiment of the present invention. The sewing machine frame 1 includes a pair of columns 2 standing on a pair of floor surfaces 23 spaced apart from each other on the left and right, an upper frame 3 fixed in a state of being bridged over a high portion of both columns 2, and both columns. 2 comprises a first lower frame 4 fixed in a state of being bridged between the middle and high parts, and a second lower frame 5 fixed in a state of being bridged in the lower parts of both columns 2.
The support 2, the upper frame 3, the first lower frame 4, and the second lower frame 5 use square-section steel pipes. Although not particularly limited, in the present embodiment, high-rigidity steel pipes are used for the upper frame 3, the first lower frame 4, and the second lower frame 5.

The struts 2 are respectively erected on the upper surfaces of a pair of bases 6 extending in the front-rear direction and disposed on the floor 23 with a space between them. Each base 6 is made of a steel pipe having a rectangular cross section, and a floor contact portion 11 is provided at the front and rear ends and an intermediate portion of the bottom surface of each base 6. Each floor contact portion 11 includes a height adjustment mechanism (not shown) for adjusting the height of the base 6 from the floor surface 23. The height of the sewing machine frame 1 is adjusted by the height adjusting mechanism so as to be horizontal. The column 2 is composed of a column main body 2a having a rectangular cross section, and an auxiliary column 2b having a rectangular cross section welded and fixed to the rear side. The upper end of the auxiliary column 2b protrudes above the upper end of the column main body 2a by the height of the upper frame 3, and a rectangular recess 15 is formed by the front surface of the upper end of the auxiliary column 2b and the upper end surface of the column main body 2a. Are formed.

The upper frame 3 has both ends fitted into the rectangular recesses 15 and bridged over the upper ends of the columns 2, and the rectangular recesses 15 and the ends of the columns 2 are fixed by welding. The front surfaces of both ends of the upper frame 3 are substantially flush with the front surfaces of the columns 2. A plurality (four in the illustrated example) of sewing heads 8 for driving the needles 7 are arranged in the upper frame 3 in the longitudinal direction.

In the middle part of the upper frame 3 in the length direction, there is provided a connecting column 12 for connecting a rear surface of the middle part to an upper surface of an intermediate base 13 to be described later.

The first lower frame 4 is welded and fixed in such a manner that both ends of the first lower frame 4 are bridged over the middle and high portions of the auxiliary columns 2b of the columns 2, and supports a cylindrical bed containing a shuttle (not shown). Function. The first lower frame 4 is provided such that the front surface thereof is relatively rearward from the front surfaces of the upper frame 3 and the second lower frame 5 when viewed from a plane (illustrative and limited thereto). Instead, the front or rear surfaces of the upper frame 3, the first lower frame 4, and the second lower frame 5 may be provided at the same position when viewed from a plane.) The same number of cylindrical beds 9 as the number of sewing heads 8 are arranged in the length direction of the first lower frame 4. The tubular bed 9 is fixed to a rear surface of the first lower frame 4 (illustration is not particularly limited and may be a front surface).

The second lower frame 5 is welded and fixed in such a manner that both ends are bridged over the lower part of the column main body 2a of each column 2, and has a function of increasing the rigidity of the sewing machine. The front surfaces of both ends of the second lower frame 5 are substantially flush with the front surfaces of the columns 2. An intermediate portion in the length direction of the second lower frame 5 is supported by an intermediate base 13 as an intermediate support portion extending in the front-rear direction. The intermediate base 13 is made of a steel pipe having a rectangular cross section, and a floor grounding portion 11 with a height adjusting mechanism similar to the base 6 is provided at the front and rear ends and an intermediate portion of the bottom of the intermediate base 13. .

A lifting table 14 is supported by the second lower frame 5 so as to be able to move up and down. This lifting table 14
Are a raised position in which the upper surface is flush with the upper surface of the cylindrical bed 9 to form a table surface together with the cylindrical bed 9, and a retracted position in which the cylindrical bed 9 is retracted below and the cylindrical bed 9 is exposed. To go up and down between. A sewing frame on which a work cloth is stretched is placed on the tubular bed 9, and the needle 7 provided on the sewing machine head 8 and the shuttle built in the tubular bed 9 cooperate with each other to raise the raised position. In this example, a flat work cloth is sewn, and a cylindrical work cloth is sewn at the retracted position.

According to the sewing machine frame 1 of the cylindrical work cloth sewing machine configured as described above, basically, a small number of elements such as a pair of columns 2, an upper frame 3, a first lower frame 4, and a second lower frame 5 are provided. Since it is composed of parts and has a simple structure, the number of assembling steps can be reduced and the cost can be reduced.

Further, a first lower frame 4 fixed in a state of being bridged between the middle and high portions of both columns 2 and a second lower frame 5 fixed in a state of being bridged in the lower portions of both columns 2 are provided. The first lower frame 4 has a function of supporting the tubular bed 9 and the second lower frame 5 has a function of increasing the rigidity of the sewing machine. For this reason, compared with the conventional sewing machine frame 50 in which both of these functions are provided in the lower frame 54 fixed in a state of being bridged over the middle and high portions of the support, one function of increasing the rigidity of the sewing machine is provided. The second lower frame 5 is separated and shared, and the center of gravity of the sewing machine frame 1 is lowered by the amount that the second lower frame 5 is bridged between the lower portions of the two columns 2. Therefore, the stability of the sewing machine frame 1 can be improved as compared with the related art, and vibration from the sewing head 8 and the cylindrical bed 9 as vibration sources can be effectively suppressed.

Further, since the intermediate base 13 extending in the front-rear direction is provided at an intermediate portion in the longitudinal direction of the second lower frame 5, the number of the floor contact portions 11 as the contact portions to the floor 23 is increased. Can be dispersed. Also,
Since the number of the floor contact portions 11 is large, the height adjustment mechanism provided on each of the floor contact portions 11 makes it possible to easily level the sewing machine frame 1 and to improve the level accuracy. Can be.

FIGS. 4 and 5 show a sewing machine frame 30 of a cylindrical work cloth sewing machine according to a second embodiment. The sewing machine frame 30 of the present embodiment has a point that the base 13 is omitted in the middle, the floor grounding portion 11 is provided in the middle of the bottom surface of the second lower frame 5 in the longitudinal direction, and a cylinder is provided on the front surface of the first lower frame 4. And the upper frame 3,
The upper frame 3 and the first lower frame 4 are connected by the upper connecting member 31 at an intermediate portion in the length direction of the first lower frame 4 and the second lower frame 5, and the first lower frame 4
The second embodiment differs from the first embodiment only in that the second lower frame 5 is connected by the lower connection member 32. According to the present embodiment, the effects of the first embodiment can also be obtained.

Note that the present invention is not limited to the configuration of the above-described embodiment, and may be embodied with appropriate modifications without departing from the spirit of the invention, for example, as follows. (1) The present invention is applied to a type of sewing machine that is not compatible with a cylindrical work cloth. (2) When viewed from a plane, the upper frame 3 and the first lower frame 4
And the position of the second lower frame 5 in the front-rear direction is appropriately changed.

[0023]

As described in detail above, according to the sewing machine frame of the multi-head sewing machine according to the first aspect of the present invention, it is possible to improve the stability and suppress the vibration with a simple structure.

In addition to the above-mentioned effects, according to the sewing machine frame of the multi-head sewing machine according to the second to fourth aspects of the present invention, the above-mentioned effects can be further improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a sewing machine frame of a multi-head sewing machine according to a first embodiment of the present invention.

FIG. 2 is a front view of the sewing machine frame.

FIG. 3 is a right side sectional view of the sewing machine frame.

FIG. 4 is a front view showing a sewing machine frame of a multi-head sewing machine according to a second embodiment of the present invention.

FIG. 5 is a right sectional view of the sewing machine frame.

FIG. 6 is a front view showing a sewing machine frame of a conventional multi-head sewing machine.

FIG. 7 is a right side sectional view showing the sewing machine frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sewing machine frame 2 Prop 3 Upper frame 4 First lower frame 5 Second lower frame 6 Base 8 Sewing head 9 Tubular bed 13 Intermediate base 23 Floor surface 30 Sewing frame

Claims (4)

[Claims] An upper frame for mounting a sewing machine head, which is fixed on a pair of pillars standing on a floor surface spaced apart from each other on the right and left sides and a high portion of the both pillars, The first lower frame for attaching a bed fixed in a state of being bridged between the middle and high portions of the two columns, and the rigidity of the sewing machine frame fixed in a state of being bridged in the low portion of both columns. A multi-head sewing machine frame with a second lower frame for heightening. 2. The sewing machine frame of a multi-head sewing machine according to claim 1, further comprising an intermediate support portion for supporting an intermediate portion in the length direction of the second lower frame with respect to a floor surface. 3. The sewing machine frame of a multi-head sewing machine according to claim 1, wherein said support columns are respectively provided on upper surfaces of bases extending in a front-rear direction provided on a floor surface. 4. The sewing machine frame of a multi-head sewing machine according to claim 2, wherein the intermediate support portion is a base provided on a floor surface and extending in a front-rear direction.