JPH0333343Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention enables a hook-shaped thread guide installed in the curved part of the lower looper of the sewing machine to slide against the lower looper, and to move to the hook-shaped thread guide. This invention relates to a thread guide device for a lower looper of a sewing machine that facilitates threading operations.

``Prior Art'' Conventionally, a hook-shaped thread guide in a lower looper of a sewing machine is fixedly installed on a curved part of the lower looper body, and a feed dog, a throat plate, and a front part (a The shaded area in Figure 1) contains other mechanical parts such as a cloth cutting device and is blocked off.
I felt inconvenience that the threading part was not visible and the threading operation was obstructed by the mechanical part, making the threading operation very difficult.

``Problems that the invention can solve'' When threading the lower looper of a conventional sewing machine, the threading part is blocked by the other mechanical parts and cannot be seen visually. Since it is necessary to use an auxiliary tool such as tweezers, and visual inspection is difficult, there is a problem in that there are many troubles in which the thread is accidentally hung on other parts.

Furthermore, in the case of sewing machines used for industrial purposes, the users are experienced, and there are few problems such as these troubles, but in the case of home-use lock sewing machines, which have become popular in recent years, the users are often beginners. There is a demand for ease of this thread threading work. The object of the present invention is to provide a thread guide device for a lower looper of a sewing machine in which other mechanical parts do not interfere with the thread threading operation to the thread guide.

"Means for Solving the Problem" In order to achieve the above-mentioned purpose, the present invention provides a threading operation that is located close to the curved part of the looper main body, which is the original operating position, and threads the thread into the thread guide. Sometimes, the thread guide is slid away from the curved portion of the louver body, so that the thread guide is exposed from other mechanical parts.

"Function" When the sewing machine is operating, the hook-shaped thread guide 2 is positioned close to the curved part 3 of the lower looper main body 1, and during threading operation, the thread guide 2 is slid away from the curved part 3 of the lower looper main body 1. , since it is exposed from other mechanical parts 7 such as the feed dog, throat plate, and cloth cutting device, the thread threading part 8 at the tip of the hook-shaped thread guide 2 can be seen visually and does not interfere with other mechanical parts. This makes it possible to easily perform the threading operation without being forced to do so. . When the threading operation is completed, the locking protrusion 6b at the tip of the catch 6 is inserted into the groove 1a of the lower looper body to restore the thread guide 2 to its normal operating position.

``Example'' Now, a detailed explanation will be given with reference to the attached drawings showing an example of implementing the present invention.

Fig. 1 shows the lower looper main body during threading operation, and Fig. 2 shows the state in which the thread guide is attached to the looper main body.

Reference numeral 1 denotes a known lower looper main body, the proximal end of which is fixed to a lower looper operating lever as is known. Reference numeral 2 denotes a hook-shaped thread guide whose tip is curved to form a threading part 8, and the base part 5a is inserted into a sliding groove 4 bored in the vicinity of the curved part 3 of the lower looper main body 1, as shown in FIG. The proximal end is supported and fixed to the thread guide support 5 which is fitted and penetrated. Reference numeral 6 denotes a stopper made of a spring material, the base end of which is formed into a groove shape 6a into which the vicinity of the curved part 3 of the lower looper body 1 is fitted, the distal end of which has the same width as the curved part 3, and is secured to the distal end. The protrusion 6b is curved and molded, and the base 5 of the thread guide support 5
a, and the base end of the support 5 is caulked to the back surface of the stopper 6, so that the thread guide support 5 can be slid in the sliding groove 4 from the solid line position to the temporary line position. be. Reference numeral 7 indicates other mechanical parts such as a female mechanism for cutting cloth, and a hook-like thread guide 2 is shown as a solid line.
During the threading operation, the threading section 8 of the thread guide 2 is behind the other mechanism section 7 as shown by the solid line, making the threading operation really difficult. However, in this proposal, the thread guide support 5
By sliding the threading part 8 like a temporary line, the threading part 8 is exposed to the right side in FIG.
This makes it easier to thread the thread. Here, 1a is a groove bored close to the curved part 3 on the back side of the looper main body 1, and a hook-shaped thread guide 2
When it is restored to its original position, the locking protrusion 6b of the catch 6 is fitted and locked, and the hook-shaped thread guide 2 is stably placed in the position when the lower looper is activated.

"Effects" The present invention has the above-mentioned configuration, and the hook-like thread guide 2
When performing a threading operation, the thread guide 2 is exposed from other mechanism parts 7 by the thread guide support 5 along the sliding groove 4 bored in the lower looper main body 1. , the threading section 8 can be visually checked to facilitate the threading operation, and when the lower looper is operated, the locking protrusion 6b of the catch 6 is inserted into the groove 1a drilled in the looper body 1, and the thread guide 2 Since the threading part 8 of the hook-shaped thread guide 2 can be seen visually during the threading operation, the
There is no need to use an auxiliary tool such as tweezers, and even a beginner can easily perform threading work without accidentally threading other parts.

[Brief explanation of the drawing]

The attached drawings show an example of the implementation of the present invention.
The figure is a perspective view of the main part of the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 1. DESCRIPTION OF SYMBOLS 1... Lower looper main body, 2... Hook-shaped thread guide, 3... Curved portion, 4... Sliding mechanism, 5... Thread guide support, 6... Stopper, 7... Other mechanical parts, 8
...Threading section.

Claims (1)

[Scope of utility model registration request] A hook-shaped thread guide 2 installed in the curved part 3 of the lower looper body 1 of the sewing machine is fixed to a sliding groove 4 bored in the vicinity of the curved part 3 of the lower looper body 1 with a thread guide support 5 and a stopper 6. 1. A thread guide device for a lower looper of a sewing machine, characterized in that the thread guide device is provided with a lower looper and is capable of sliding movement.