RU223547U1 - Device for tensioning shuttle thread on sewing machines - Google Patents

Abstract

The utility model relates to the clothing industry, in particular to the shuttle devices of neck machines, and can be used when working with threads of large diameters. The purpose of the utility model is to improve the quality of stitching. The technical result is improved stitch quality due to the absence of compressive force on the shuttle thread. The technical result of the utility model is achieved by the fact that a device for tensioning the shuttle thread on sewing machines, including a bobbin case with grooves designed for installing and orienting the bobbin, which consists of a sleeve, upper and lower disks with spirals printed on their surfaces, which are placed into a housing with protrusions for orienting the bobbin and a guide groove that sets the movement of the pressure plate, which includes a stand, a plate and an adjusting screw for changing the tension force, tensions the shuttle thread by influencing the entire volume of the thread located on the bobbin.

Description

The utility model relates to the clothing industry, in particular to the shuttle devices of sewing machines, and can be used when working with large diameter threads.

The closest in technical essence to the invention is the device “Bobbin case of a sewing machine” (Patent RU No. 2003745 C1, November 30, 1993). A bobbin case of a sewing machine, containing a cylindrical body with a window, a latch, an installation pin and a tension spring attached to the cylindrical body, which has an oval slot at one end, located above the window in the cylindrical body. In the tension spring adjacent to the oval slot there is a groove for placement in the thread when installing the bobbin in the bobbin case.

The disadvantages of this device are damage to the surface of the shuttle thread and its unwinding due to the impact of compressive force on the shuttle thread.

The purpose of the utility model is to improve the quality of stitching.

The technical result is an improvement in the quality of the stitch due to the absence of compressive force on the shuttle thread.

The technical result of the utility model is achieved by the fact that the device for tensioning the shuttle thread on sewing machines includes a bobbin case with grooves intended for installation and orientation of the bobbin, and a bobbin consisting of a sleeve, upper and lower disks, with spirals applied to their surfaces, which are placed in a housing with protrusions to orient the bobbin, and a guide groove that sets the movement of the pressure plate, which presses the entire volume of threads against the sleeve and consists of a stand, a plate and an adjusting screw for changing the tension force, for tensioning the shuttle thread by acting on the entire the volume of thread on the bobbin.

In FIG. 1 - Device for tensioning the shuttle thread; a) bobbin case, b) bobbin.

In FIG. 2 - Device for tensioning the shuttle thread in a section; a) bottom view, b) side view.

Fig. 3 - Pressure plate; a) assembled, b) disassembled.

The device for tensioning the shuttle thread on sewing machines includes a bobbin case (1), Fig. 1 a) with grooves (4) and (6) intended for installation and orientation of the spool (2), and the spool (2) FIG. 1 b), consisting of a sleeve (8), Fig. 2 a) and b), upper and lower disks (7), with spirals applied to their surfaces, which are placed in a housing (9) with protrusions (3) and (5) for spool orientation, and a guide groove (11), setting the movement of the pressure plate (12), Fig. 3 a) and b), which presses the entire volume of the shuttle thread against the bushing and consists of a stand (13), a plate (15) with a protrusion (16) and an adjusting screw (17) with a nut (18) to change the tension force.

The device for tensioning the shuttle thread works as follows. The thread, unwinding from the bobbin (2), transmits rotational motion to the disks (7). The disks (7) spirally impart movement to the rack (13) through the grooves (19). The stand, resting against the slot (11) of the body (9), begins to move in the radial direction and, through the plate (15), presses the entire volume of the thread against the sleeve (8), thereby creating tension on the shuttle thread. To adjust the tension, tighten the screw (17) with the nut (18), which moves the plate (15) with the protrusion (16) in the guides (14). The housing (9) with the cover (10) is used to install the pressure plate (12) in the desired position. The pressure plate is returned to its original position by rotating the bobbin in the opposite direction when securing the body and cover while winding the thread onto the bobbin.

The developed utility model can be used to work on sewing machines when sewing with large diameter threads. This useful model allows you to improve the quality of the stitch due to the absence of compressive force on the shuttle thread.

Claims (1)

A device for tensioning shuttle thread on sewing machines, including a bobbin case with grooves designed for installing and orienting the bobbin, and a bobbin consisting of a sleeve, upper and lower disks with spirals printed on their surfaces, which are placed in a housing with protrusions for orientation bobbin and a guide groove that sets the movement of the pressure plate, which presses the entire volume of thread against the sleeve, and consists of a stand, a plate and an adjusting screw for changing the tension force for tensioning the shuttle thread by influencing the entire volume of thread located on the bobbin.