JPS5929657Y2 - Zigzag sewing machine needle bar support - Google Patents

Description

[Detailed description of the invention] The present invention relates to a needle bar support for a sewing machine, and its purpose is to construct the needle bar support from an upper member, a lower member for holding the needle bar, and a connecting member between the two. It is an object of the present invention to provide a needle bar support body in which the movement of the lower part member relative to the upper part member can be adjusted with a simple operation, and the needle-cartridge gap can be adjusted.

Next, one embodiment of the present invention will be described.

In Fig. 1/l-, 1 is an arm of the sewing machine, 2 is a horizontal hook, and the vertical movement of the needle bar 4 to which the needle 3 is attached is controlled by the main shaft 5, take-up crank, etc., as in the known needle bar drive mechanism. 6, the needle bar crank pin 7, the needle bar crank rod 8, and the needle bar plate 9.

On the other hand, the movement of the needle in the swing direction is transmitted via the rod end 10 and needle bar support 11 from a zigzag generating mechanism (not shown).

Referring to FIG. 2, the needle bar support 11 includes an upper member 14 supported by a pin 12.13 fixed to the arm machine frame 1, and a hole 15.16 for guiding the vertical movement of the needle bar 4. The lower part member 17 has a lower part member 17, and a connecting member 18 which connects the lower part member to the upper part member 14 so as to be movably adjustable.

The coupling member is composed of an upper screw 19 and a lower screw 20.

The upper screw 19 has a guide part 21 and a threaded part 22, and the guide part is connected to the hole 23 of the lower member 17 and the upper member 1.
The threaded portion is machined with high accuracy so as to engage firmly with the guide hole 24 provided in the upper member 14 without play, and the threaded portion is a threaded hole provided concentrically with the guide hole 24 of the upper member 14. 24
It is designed to engage with.

On the other hand, the lower screw 20 passes through an adjustment groove 26 provided in the lower member 17 and engages with a screw hole 27 provided in the upper member.

In the above configuration, the needle-hook clearance X (Fig. 1) can be adjusted by slightly loosening the upper screw 19 and lower screw 20 that firmly fix the lower member 17 to the upper member 14. By slightly rotating the upper screw 19 about the axis AA' (Fig. 2), the needle 3 is moved in the direction of adjusting the needle-to- hook clearance X, and then the upper screw 19 and the lower part 20 are tightened. It can be performed reliably with simple operations.

The needle bar support adjustment structure of the present invention is effective not only for the horizontal hook type sewing machine shown in one embodiment, but also for the vertical hook type sewing machine.

As described above, according to the present invention, the needle-hook clearance can be reliably adjusted with a simple operation, and therefore has great industrial and practical effects.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a needle bar support according to an embodiment of the present invention assembled into a sewing machine, and FIG. 2 is an exploded perspective view of the needle bar support. In the figure, 1 is the arm machine frame, 3 is the needle, 4 is the needle bar, 10
is a rod end, 11 is a needle bar support body, 12.13 is a pin, 14 is an upper part member, 17 is a lower part member, 18 is a connecting member, 19 is an upper screw, 20 is a lower screw, X is a needle-capacitor Clearance 23 is a hole formed near the top of the T member, and 26 is an adjustment stop.

Claims (1)

[Scope of utility model registration request] The needle bar support of a zigzag sewing machine is supported by a pin fixed to the arm machine frame, and has an upper member separate from the upper member to which movement in the width direction of the needle from the zigzag generating mechanism is transmitted via a rod conduit. a lower member having a pair of holes for guiding the vertical movement of the needle bar, and a hole formed near the top of the lower member that is fixed near the middle of the upper member and loosened during adjustment. an upper screw and a lower screw that is loosened together with the upper screw during adjustment, the lower portion being configured such that when the upper screw is loosened, the lower member can rotate about the upper screw in the adjustment direction of the needle-rotator gap; 1. A needle bar support for a zigzag sewing machine, comprising: a lower screw inserted into an adjustment groove formed in a member and a lower screw screwed into the upper member;