JPS6366550B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a sewing machine drive device that controls the rotational speed of an industrial sewing machine, controls the needle stop position, and controls the solenoid of the sewing machine.

Conventional Structure and Problems Generally, a sewing machine drive device is installed as shown in FIG. That is, a detector 2 is attached to the rotating shaft of the sewing machine 1, a driving motor 3 is connected to the sewing machine 1 by a belt, and a plurality of motors built in the motor 3 and the sewing machine 1 receive signals from the detector 2. A control device 4 for controlling the solenoid of the sewing machine is attached to the bottom surface of the sewing machine table 5.
are combined to work together.

FIG. 2 shows the external configuration of the conventional control device 4,
Figure 3 shows the internal structure, in which an operating switch 8 and an electrical connector 9 are attached to the front of the housing 7, and a power supply section 1 consisting of a transformer, a capacitor, etc.
0 and a control circuit component 12 incorporated in a printed wiring board 11 are fixed to a housing 7 and hermetically sealed with a lower cover 14 attached to the housing 7 with screws 13. Note that 15 is a pedal operating section connected to the pedal.

Here, the operating switch 8, the electrical connector 9, and the control circuit component 12 differ depending on the type of sewing machine, and for example, a model with a low-grade function with a small number of operating switches 8 and electrical connectors 9 is used, and a model with a high-end function has a small number of operating switches 8 and electrical connectors 9. When switching, each part of the conventional one is in the housing 7.
Since the control device 4 is integrally fixed to the control device 4, there is a drawback that the entire control device 4 must be purchased and replaced.
In addition, when inspecting or repairing the control circuit components 12, the lower cover 1
However, since the control device 4 is installed in the position shown in Fig. 1, its workability is extremely poor, and the changeover switch for changing the sequence for controlling the solenoid of the sewing machine 1 is difficult. 16 is assembled on the printed wiring board 11 fixed to the housing 7, which has the drawback of extremely poor operability.

Purpose of the Invention The present invention aims to eliminate the above-mentioned drawbacks of the conventional equipment.It simplifies model switching, improves the workability of inspection and repair, and improves the operability of the changeover switch by unitizing the configuration. The purpose is to simplify attachment and detachment and ensure secure fixation.

Structure of the Invention In the control device constituting the sewing machine driving device of the present invention, the power supply section and the pedal operation section, which are common parts for each model, are fixed to the housing, and the operation switch section and the electric connection section, which are exclusive parts, are fixed to the housing. and the electrical parts are fixed to the chassis to form a control unit that is an independent unit part, and the front part of the chassis is configured so that it can be fixed to the front part of the casing, making it easy to attach and detach the control unit.
Further, a leaf spring fixed to the rear end of the chassis is compressed and deformed between the casing and the chassis to prevent chattering of the chassis and to securely fix the control unit.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 shows a schematic configuration of the present invention, in which a window 7a is provided on the front side of the housing 7, and a power supply section and a pedal operation section 15 (not shown) are fixed thereto. The printed wiring board 11 incorporating the control circuit component 12, the operation switch 8, and the electrical connector 9 have an operation panel portion 17a on the front surface that covers the window 7a of the housing 7,
Parts thereof are each fixed to a chassis 17 housed within the casing 7, and constitute a control unit 18. Note that the chassis 17 is connected to the operation panel section 17.
a is removably attached to the housing 7 with screws 19, and a curved leaf spring 20 is fixed to the rear of the chassis 17 to prevent the chassis 17 from chattering. In addition, in order to facilitate attachment and detachment of the control unit 18, the operation panel section 1 of the chassis 17 is
Handles 21 are attached to both ends of 7a. Furthermore, the control circuit component 12, the power supply section, and the pedal operation section 15 are connected by a connector 22, and the changeover switch 16 is incorporated into the printed wire board 11.

FIG. 5 shows a leaf spring 20 fixed to the chassis 17.
6, the curved leaf spring 20 is fixed by caulking the protrusion 17b of the chassis 17, and when the front part of the chassis 17 is fixed to the housing 7 with the screws 19 as shown in FIG. 20 is pressed against the casing 7, and the curved portion is extended to be firmly fixed in the recess 7b surrounded by the casing 7 and the lower lid 14.

Effects of the Invention As is clear from the above explanation, the present invention provides that the power supply unit and pedal operation unit, which are common parts of each model, are fixed to the housing, and the operation switch, electric connector, and electric parts, which are exclusive parts of each model, are fixed to the housing. A control unit is constructed by integrally fixing the parts to the chassis, and by fixing a curved leaf spring to the rear end of the chassis, it is easy to use when changing models, inspecting or repairing the control device, or when changing the solenoid. The control unit can be easily attached and detached when operating the changeover switch for changing the sequence to be controlled, and its fixation can be ensured.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the assembled state of the sewing machine drive device, Fig. 2 is an external perspective view of a conventional control device, and Fig. 3 is a perspective view showing the assembled state of the sewing machine drive device.
The figure is a perspective view showing the internal structure of a conventional control device, and FIG. 4 is a perspective view of a control device showing an embodiment of the present invention.
5 is a partially enlarged view of FIG. 4, and FIG. 6 is a partially sectional view of FIG. 4. 1... Sewing machine, 2... Detector, 3... Motor,
4...control device, 7...casing, 7a...window, 8...
...Operation switch, 9...Electrical connector, 10...Power source, 12...Control circuit components, 17...Chassis, 17a...Operation panel, 18...Control unit, 20...Plate spring (elastic support) body).

Claims (1)

[Claims] 1. A housing comprising: a motor that drives a sewing machine; a control device that controls the motor; and a detector mounted on the sewing machine; and a control unit comprising an operation switch, a control circuit component, and an electrical connector, each of which has an operation panel section on the front surface that covers the window of the casing, and a part of which is fixed to a chassis housed within the casing. A sewing machine driving device comprising: an operation panel section of the chassis removably fixed to the housing; and an elastic support interposed between the rear end of the chassis and the housing.