JPH0150436B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a looper holder in a sewing machine. In particular, the looper holder is applied to a looper holder used in a sewing machine that performs chain stitches or decorative stitches.

[Prior Art and Problems] Sewing machines of the type specified above have one, two or more needles and the same number of loopers arranged correspondingly, apart from their arrangement and spacing. It is known that sewing is performed by cooperating with.

The looper is removably attached to a looper holder which consists of a support arm and a fixing block that rests on the upper part of the arm. It is suitable for connecting.

Drive means are provided for acting on the looper receiver, thereby moving the looper receiver such that the looper operates in a substantially elliptical orbit about the direction of movement of the corresponding needle, the longitudinal axis of the trajectory. is perpendicular to the feeding direction, and the looper is arranged to reciprocate in a straight line along its own axis. This situation causes various problems due to the following facts. In other words, the positioning of the looper is determined by the difference in parameters caused by the structural characteristics of the sewing machine and the characteristics of the seam you want to sew.
This is because in that case, it must be determined appropriately depending on the case. More specifically, such parameters may vary depending on, for example, whether there are one, two or more stitches (i.e. whether they have to be sewn with one, two or more needles); It is determined by the distance between the centers of a book or larger stitches.

Due to the variety of variations and combinations of the above-mentioned parameters, it is necessary to allow the looper to be positioned based on various types of positioning.

There are two possibilities to substantially prevent the above-mentioned problem.

One possibility is to modify the structural properties of the looper accordingly.

A second possibility is to modify the structure of the looper holder so that the relative positioning of the loopers supported by it can be modified.

However, both solutions have various drawbacks. In fact, as can be easily understood, the first solution requires the provision of a large number of loopers, which is very expensive, and furthermore, the storage thereof is very difficult.

As for the second solution, it has a built-in problem that requires replacing the looper holder to meet the demands of various buyers. In these solutions, it takes a lot of time to disassemble and replace a large number of parts and to adjust the tuning of the looper, and this adjustment requires a skilled person.

Under these circumstances, the first object of the present invention is to improve the structure of the looper holder so that it can be accurately adjusted for any type of sewing with simple operation.

A further object of the present invention is to make the structure of the looper receiver easy to manufacture using current technology.

[Means for Solving the Problems] These objects mentioned above, and which will become clearer in the description, include a support member leading to a drive means and at least one spigot removably connecting the looper. The construction of a looper holder for a sewing machine comprising at least one looper fixing block is substantially achieved by having the following features. That is, this structure is
The support member and the block are composed of two separate parts, and these parts are arranged close to each other, and a first reference plane provided at the upper part of the support member and the lower part of the block, respectively, and They are characterized in that they are connected to the second reference surface so that their surfaces are in contact with each other, and then they are removably connected using a fixing means.

These features and advantages will be further elucidated by the preferred embodiments described below, but the present invention is not limited by these illustrations.

[Embodiment] In the drawings, particularly in FIG. 9, a general view of a looper holder for a sewing machine having a structure according to the present invention is shown with reference numeral 1.

The looper receiver 1 supports at least one looper 2 and is connected to drive means, generally designated 3. By means of this drive means, the looper 2 substantially describes an elliptical trajectory 4 extending around the direction of movement of the corresponding needle, not shown; The movement is transmitted to the support member 5 by the swing pin 6.

The support member 5 is connected to the looper receiver 1 via another pin 8.
is given linear reciprocating motion in the direction of arrow 9, which corresponds to the minor axis of the elliptical orbit.

The driving means 3 further includes a connecting rod 10 that makes a linear reciprocating motion in the direction shown by the arrow 11 and rotates with respect to the looper receiver 1 via a ball bearing.
is caused to perform reciprocating motion in the direction of arrow 12, which corresponds to the long axis of elliptical orbit 4.

Since the drive means described above are not the subject of the present invention, further explanation is not considered necessary.

In its basic form, the looper receiver 1 essentially consists of a support member 13 and a block 14 designed to secure the looper.

The support member 13 and the block 14 form two separate parts and are releasably connected to each other so as to form the looper receiver 1 as an integral piece.

The support member 13 has a through hole 15 in its lower part to which the pin 8 is fixed. Further, the support member 13 has a protrusion 16
A hole provided in the threaded member 17 (see FIG. 9) is connected to a ball joint connected to the articulating rod 10.

A reference surface 18 is provided at the upper end of the support member 13 . A cylindrical recessed hole 19 is provided in this surface at right angles to the surface, and this hole communicates with a threaded hole 20 provided at right angles to the axis of the hole.

The block 14 is designed in various shapes depending on the number of loopers 2 attached thereto and the characteristics of the seam to be sewn. That is, Figures 3 and 4, 5 and 6, and 7 and 8 respectively show the block 14 used to support one looper 2, the block 14a that supports two loopers, and the block 14a used to support three loopers. A block 14b supporting the looper is shown. Of course, it is also possible to attach blocks that support three or more loopers.

In each case, spigots 21, 21a and 21b are provided on the upper surface of the blocks 14, 14a and 1b.
are provided, and a looper 2 is attached to each of them. Its attachment is carried out by means of conventional push screws through the corresponding second holes 22, 22a and 22b.

Each block 14, 14a and 14b has a second reference surface 23, 23a and 23b at its lower end;
The insert rods 24, 24a extend perpendicularly to this plane. Further, the end face of this insert rod has flattened faces 25, 25a and 25b, respectively, for the following reasons.
is attached.

As seen in the figure, the spigots 21, 21a and 2
1b is provided at the third reference plane 26, 26a and 26b at the upper end of the corresponding block. In the case of blocks 14b and 24b used when attaching one or more loopers, the third reference surfaces 26, 26a and 26b are designed to prevent mutual interference between the blades of each looper 2.
There are steps.

Although the method described above is one preferred embodiment, it is of course possible to make the reference planes 26a and 26b the same plane.

Block 1 for supporting one or more loopers
With respect to 4a and 14b, the spigots 21a and 21b may be provided at appropriate intervals according to the direction of the longitudinal axis of the looper based on the distance between the center lines of the stitches desired to be obtained. Also, depending on the offset of the needle of the sewing machine, the spigots 21a and 21b may be
can also be spaced apart in a direction perpendicular to the longitudinal axis of the looper.

As can be seen, the support member 13 has surfaces 18 and 2.
By inserting the insert rods 24, 24a and 24b into the recessed holes 19 to the point where the blocks 3, 23a and 23b touch each other, any of the blocks 14, 14a
and 14b in a removable manner. Therefore, block 1
4, 14a, and 14b are screwed into the hole 20, and are fixed via a fixing means 27 (see FIG. 9) consisting of a push screw that presses the flat surfaces 25, 25a, and 25b.
The support member 13 is fixed.

The invention has achieved its intended objectives. This looper receiver 1 can be used to create blocks 14, 14 for any type of stitch based on the characteristics of the pattern.
It is noteworthy that it has a structure that can be easily performed by simply removing and replacing a and 14b. Obviously, these operations can be performed easily by anyone, and do not require associated removal or installation of other parts of the sewing machine.

By slightly modifying the structure of blocks 14, 14a and 14b, the expense of providing multiple loopers of different types can be reduced.

Modifications and modifications may be made to the invention without departing from the scope of the invention.

[Brief explanation of drawings]

FIG. 1 is a front view of a support member constituting a part of a looper receiver having a structure based on the present invention, FIG. 2 is a plan view of the support member shown in FIG. 1, and FIG. Figure 4 is a plan view of the block in Figure 3, Figure 5 is a front view of the block when supporting two loopers, Figure 6 is the same as Figure 5. A plan view of the block shown,
Figure 7 is a front view of the block for supporting the three loopers, Figure 8 is a plan view of the block in Figure 7,
FIG. 9 is a schematic plan view of a looper holder according to the invention connected to a drive means for a sewing machine and supporting a looper.

Claims (1)

[Scope of Claims] 1. A support member 13 connected to the driving means 3, and at least one looper fixing block 14 having at least one connecting spigot 21, 21a, 21b detachably connected to the looper 2. ,1
4a, 14b, the supporting member 13 and the blocks 14, 14a, 14b form two separate parts, and a removably fixing means 27 is provided. They are used by being connected to each other via a A structure of a looper holder characterized in that the reference surface 18 and the second reference surfaces 23, 23a, 23b are joined to each other. 2. At least one recessed hole 19 is provided at the first reference surface 18 for coupling with the blocks 14, 14a, 14b,
A structure of a looper holder according to claim 1. 3 On the second reference planes 23, 23a, 23b,
At least one dowel 24, 24a, 24b is provided, which is used to connect the block 14, 14a, 14b to the support member 13, on which at least one flattened rod is provided, on which the fixing means 27 act. The structure of the looper receiver according to claim 1, characterized in that chamfers 25, 25a, and 25b are provided. 4. The looper receiver according to claim 1 or 2, wherein the fixing means 27 comprises at least one push screw 27 that is screwed into a threaded hole 20 connected to the recessed hole 19. structure. 5 The connection spigots 21, 21a, 21b are
Claim 1, characterized in that the blocks 14, 14a, 14b are located on the third reference planes 26, 26a, 26b provided at the upper part thereof, respectively, and their heights are set to have a step difference from each other. The structure of the looper holder described in section. 6 The connection spigots 21, 21a, 21b are
Claim 1, characterized in that the blocks 14, 14a, 14b are located on third reference planes 26, 26a, 26b provided above, respectively, so that the planes are on the same plane. The structure of the looper holder described in . 7 The connection spigots 21, 21a, 21b are
The structure of the looper holder according to claim 1, wherein the looper holder is provided at intervals from each other based on the vertical extension direction of the looper 2. 8 The connection spigots 21, 21a, 21b are
The structure of the looper receiver according to claim 1, characterized in that the looper receivers are provided at intervals from each other in a direction perpendicular to the vertical extension line of the looper 2.