JPH07860B2 - Manufacturing method of contact rod for loom - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method of manufacturing a contact rod used for finding a yarn break of a loom.

[0002]

2. Description of the Related Art Conventionally, a contact rod used to detect a yarn breakage of a loom has a structure in which an outer plate bent in a U shape is insulated to sandwich the middle plate and the upper edge of the middle plate is exposed. As a method of manufacturing the contact rod, generally, a method of bending the outer plate into a U-shape, sandwiching the inner plate, and pressing the outer surface with a roller to closely process the outer plate and the inner plate is adopted. It was However, in the conventional method, uniform adhesion over the entire length cannot be obtained, and the adhesion is weak, and the edge of the outer plate opens due to latent elasticity over time, which causes dust (fly, staff). It has a drawback that it is likely to accumulate and it will not operate correctly.

[0003]

In order to solve the above-mentioned drawbacks of the conventional contact rod, the applicant bends the outer plate into a U-shape and inserts the contact plates into the opening portions at both edges, and then removes the corresponding portion. By pressing, the outer plate is pressed into a U-shaped body with a squeeze diaphragm shape, and then the middle plate, which has been insulated from the openings in the squeeze diaphragm shape, excluding the upper edge, is pushed into the opening. Then, by integrating the two into a single unit, it is possible to provide a contact rod that has excellent adhesion and prevents the outer plate from spreading over time (Japanese Patent Publication No.
-8054).

In the above-mentioned manufacturing method, it is needless to say that the degree of adhesion is remarkably improved as compared with the conventional method in which roller rolling is used as the means for closely contacting the middle plate and the outer plate. A sufficient function can be exhibited without damaging the dropper's sliding movement, and this manufacturing method is a process for mass-producing the product, and can provide a contact rod having an excellent mass. However, with the recent increase in demand, there is a demand for a method of manufacturing a contact rod that can be mass-produced more than the above method, can provide an inexpensive contact rod, and can function to the maximum as a part of the yarn breakage detection device. Has been.

The present invention has been made in view of the above points, and further simplifies the manufacturing process to reduce the manufacturing cost, and in addition, the middle plate and the outer plate are brought into close contact with each other in a stable state to deteriorate the function. It is an object of the present invention to provide a manufacturing method for manufacturing a contact rod having excellent functionality and usability that can be used over a long period of time.

[0006]

The gist of the present invention for achieving the above-mentioned object is to provide an outer plate, which is elongated and has a predetermined width, in a U-shape in the longitudinal direction, and has an opening in a narrowed state. A contact rod for a loom characterized in that the intermediate plate, which has been roller-formed as described above, and which has been subjected to insulation treatment with the upper edge portion left open, is expanded by pressing the opening portion out of the outer plate opening and press-fitting them to integrate them. There is a manufacturing method.

[0007]

As described above, according to the manufacturing method of the present invention, the outer plate is formed by roller forming so as to have a U-shape in the longitudinal direction so that the opening is in a narrowed state. The process at the manufacturing step of the outer plate is simplified several steps compared to the method of press-pressing both edge openings by pressing in a circular shape and forming the opening into a squeeze drawing shape, and the whole manufacturing process of the contact rod is It becomes simpler, and both manufacturing time and cost can be reduced. In addition, the outer plate opening is shaped like an outlet and the inner plate is press-fitted to integrate the two plates and improve the adhesion, and also prevent the outer plate from spreading over time. Therefore, it can be made to function to the maximum as a sensing member for the yarn breakage sensing device for a loom, and the best product can be offered to a consumer at a low price and in a large amount.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial front view showing a part of a contact rod according to the present invention, FIG. 2 is a side view showing an outer plate formed by roller molding, and FIG. 3 is a side view showing a step of press-fitting an intermediate plate into the outer plate. 4 and 5 are side views showing a state in which the intermediate plate is press-fitted.

In the drawings, reference numeral 1 designates an outer plate, which is U-shaped in the longitudinal direction in a state where both edge openings 1a are in the form of an outlet drawing by roller molding of a plate material which is elongated and has a predetermined width (a range capable of covering the entire warp yarn group). It is formed by curving so as to have a V shape.

Reference numeral 2 denotes a middle plate, which is a member for press-fitting into the outer plate 1 to form a main body of the contact rod. The middle plate 2 has an upper edge portion left before the press-fitting into the outer plate 1 so that the insulating sheet 3 is formed. If the intermediate plate 2 is pressed or pressed while the opening 1a of the outer plate 1 is expanded, the insulating plate is abutted or formed with an insulating layer.
The respective contact surfaces of the outer plate 1, the insulating sheet 3 and the middle plate 2 are completely adhered to each other under the elasticity of the outer plate 1, and the outer plate does not open outward and the degree of adhesion does not deteriorate even over time. It can be used for a long period of time.

The curving means of the outer plate 1 by means of rollers is not particularly limited, and the gap width between both edges of the opening 1a needs to be at least smaller than the thickness of the middle plate 2, The degree of squeezing of the opening 1a, the degree of curvature of the entire outer plate 1, and the like may be set in consideration of factors such as the material and shape of each member.

[0013]

As described above, according to the present invention, a method of forming an outer plate by press working, that is, forming a U-shape, and then applying a contact plate to the opening to pressurize the opening to form an aperture. Compared with the method, this manufacturing method can obviously reduce the manufacturing cost and time for the whole, because it requires a simple manufacturing process. Moreover, it is roller molding suitable for mass production and further mass production. Can be expected. As a matter of course, the outer plate is made into a mouth-drawing shape and the inner plate is press-fitted to enhance the adhesion between the two, preventing the spread of the outer plate over time to prevent the decrease in adhesion and the retention of cotton dust. The product itself is of high quality, and has the great effect that the best product can be provided to the consumer.

[Brief description of drawings]

FIG. 1 is a partial front view showing a part of a contact rod according to the present invention.

FIG. 2 is a side view showing an outer plate 1 formed by roller forming.

FIG. 3 is a side view showing a process of press-fitting the middle plate 2 into the outer plate 1.

FIG. 4 is a side view showing a state where the intermediate plate 2 is press-fitted.

[Explanation of symbols]

 1 Outer plate 2 Middle plate 3 Insulation sheet

Claims (1)

[Claims] 1. A middle plate which is elongated and has a predetermined width is roller-formed so as to have a U-shape in the longitudinal direction and whose opening is in a squeezing condition, and an insulating middle plate is left with its upper edge portion left. The method for manufacturing a contact rod for a loom, characterized in that the opening is pushed out from the opening and is press-fitted to integrate the two.