JP2000233093A - Oil spray lubrication for sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the constitution of the whole lubricator by providing a rotating shaft rotating in an oil tank, interlocking with a spindle of a sewing machine with an atomizing means for atomizing oil in the oil tank, and with a blowing means for sending atomized oil to an oil path reaching an oil feed part by air pressure. SOLUTION: When a pulley 24 is rotated by a driving motor, a spindle 23 is rotated, and a needle 25 is moved vertically through a crank mechanism 27 and a needle bar 26. A vertical shaft 28 is rotated through bevel gears 34, 35, and further a shuttle 30 is rotated through bevel gears 36, 37 and a shuttle shaft 29. During rotation of the shuttle shaft 29, a stirring plate 38 and a fan 40 fixed to the shuttle shaft 29 in an oil tank 32 are rotated, thereby scattering atomized oil 39 from the outer periphery of the stirring plate 38. Atomized oil is sent from a control hole 33 to an oil feed hole 31 by the pressure of air taken from a hole 42 by rotation of the fan 40 to lubricate the shuttle 30. The feed quantity of oil is regulated by increasing and decreasing an open area of the control hole 33 by a control screw 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying and lubricating apparatus for a sewing machine that lubricates a predetermined portion of oil in an oil tank with rotation of a main shaft of the sewing machine.

2. Description of the Related Art As a conventional lubricating apparatus of this type, for example, there is one as described in Japanese Patent Application Laid-Open No. 4-297297 shown in FIG. This conventional refueling device,
A pump main body 3 provided with a lubricating oil atomizing device at a lower portion and provided vertically in an oil tank 2 of an arm 1 of a sewing machine;
A pressure air supply source 5 to the pump body 3, an electromagnetic valve 6 provided between the pressure air supply source 5 and the pump body 3,
A controller 7 of the solenoid valve 6, a pressure air chamber 8 communicating the atomizing device with the oil layer of the oil tank 2, a lubricating oil discharge pipe 9 communicating with the oil layer of the oil tank 2, and a lubricating oil discharge pipe 9
Is provided with an air nozzle 10 provided in the vicinity of. And in this conventional lubricating apparatus, the control
The electromagnetic valve 6 is operated by a signal from the controller 7 to supply the compressed air from the pressure air supply source 5 to the air cylinder 4 and the pump body 3. Thus, the pump body 3 is lowered to bring the bottom surface of the pump body 3 into close contact with the bottom surface of the oil tank 2 and the oil supply pipe 11
Sent to Due to this pressure air flow, the air pressure in the pressure air chamber 8 becomes higher than the atmospheric pressure, the lubricating oil in the pressure air chamber 8 rises, is atomized by the pressure air flow, and is sent to the oil supply pipe 11. The lubrication is sent to the required lubrication point of the sewing machine.

However, this conventional lubricating apparatus has the following problems.
That is, in this refueling device, a pump body 3 having an atomizing device, an air-cylinder-4 as a lifting / lowering means of the pump body 3, a pressure air supply source 5 to the pump body 3,
A solenoid valve 6 provided between the pressure air supply source 5 and the pump body 3, a controller 7 for the solenoid valve 6, a pressure air chamber 8 for communicating the atomizing device with the oil layer of the oil tank 2, A number of devices such as a lubricating oil discharge pipe 9 communicating with the oil layer of the tank 2 and an air nozzle 10 provided in the vicinity of the lubricating oil discharge pipe 9 are required. There are problems such as an increase in the cost of the device.
Further, since the pressurized air supply source 5 is required, the sewing machine having the oil supply device can only be used in a sewing factory having the pressurized air supply source 5, and there is a problem that the use place is limited. . Furthermore, this lubricating device cannot lubricate in proportion to the rotation speed of the sewing machine.Therefore, when the sewing machine rotates at a high speed, the lubrication amount becomes insufficient and seizure occurs. There is a problem that the commercial value of the product is lowered.

According to a first aspect of the present invention, an oil tank containing lubricating oil is fixed to a rotary shaft that rotates in the oil tank in conjunction with a main shaft of a sewing machine. Atomizing means for atomizing the oil in the oil tank, an oil supply path connecting the hollow portion of the oil tank to the oil supply section, and an air pressure which rotates the atomized oil in the oil tank by rotating in conjunction with the main shaft of the sewing machine. And a blowing means for sending to the oil supply path. According to the first aspect of the present invention, the atomizing means is provided inside the sewing machine, and the air blowing means which rotates in conjunction with the main shaft of the sewing machine and sends the atomized oil in the oil tank to the oil supply path by air pressure. Is provided, there is an effect that the configuration of the entire refueling device is extremely simplified, and the cost of the refueling device is reduced. Further, since the pressurized air supply source 5 is not required, the sewing machine having the oil supply device can be used in a sewing factory without the pressurized air supply source 5, so that the use place is not limited. Further, in the oil tank, air containing atomized oil is supplied to the oil supply section via an oil supply path. For this reason, there is no possibility that oil is not supplied to a portion that does not require oiling. According to the second aspect of the present invention, since the oil supply path is provided with an adjusting means capable of adjusting the flow rate of the atomized oil to the opening at the opening of the oil tank in the hollow portion of the oil tank, In addition to the above effects, a small amount of proper lubrication can be accurately obtained, seizure of the mechanism can be prevented, and stable sewing can be performed for a long period of time. This has the effect of improving product value. According to the third aspect of the present invention, since the adjusting means for adjusting the gap of the opening of the oil supply passage communicating with the inside of the oil tank is provided, an appropriate amount of oil can be accurately supplied, and the seizure of the mechanism can be prevented. It is possible to stably sew for a long period of time and prevent excessive lubrication and prevent the sewn product from being stained, thereby improving the commercial value of the sewn product. According to the fourth aspect of the present invention, the air hole communicating with the hollow portion in the oil tank and the atmosphere is provided, so that in addition to the above-described effects, the responsiveness at the time of refueling adjustment is improved, and Refueling of quantity can be performed accurately. According to the fifth aspect of the present invention, the atomizing means and the blowing means are provided on one rotating shaft which rotates in conjunction with the main shaft of the sewing machine. As a result, there is an effect that the lubricating device becomes compact and can be easily provided inside the narrow sewing machine. According to the sixth aspect of the present invention, since the blowing means and the atomizing means are provided in order in a direction away from the air holes, the oil is always supplied from the air holes to the blowing means. Is atomized stably and reliably. According to the seventh aspect of the present invention, since the adjusting means for opening and closing the opening of the oil supply passage communicating with the inside of the oil tank is provided, an appropriate amount of oil can be supplied. According to an eighth aspect of the present invention, there is provided a detecting means for detecting the temperature of the refueling section, and a control means for controlling the adjusting means according to the output value of the detecting means. For this reason, it is possible to supply an appropriate amount of fuel to the refueling unit without excess or deficiency. According to the ninth aspect of the present invention, the control means includes a plurality of numerical data comprising an upper limit value and a lower limit value, and compares the plurality of numerical data with the output value from the detecting means. , Controlling the adjusting means. For this reason, a more appropriate amount of refueling can be performed to the refueling unit without excess or shortage. Further, according to the tenth aspect, the control means includes a plurality of numerical data including an upper limit value and a lower limit value, and is capable of changing the plurality of numerical data. For this reason, the operator can arbitrarily change the numerical data based on the sewing conditions such as the material and thickness of the cloth, so that an appropriate amount of lubrication can be performed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIG. Reference numeral 20 denotes a sewing machine main body, which comprises an arm 21 and a bed 22.
A main shaft 23 of the sewing machine is rotatably supported by the arm 21. A pulley 24 rotated by a drive motor (not shown) is fixed outside the arm 21 on the right end. A crank mechanism 27 is provided in the arm 21 for moving the needle bar 26 to which the needle 25 is fixed by the rotation of the main shaft 23 up and down. Reference numeral 28 denotes a vertical axis rotatably supported in the arm 21 in the vertical direction, and reference numeral 29 denotes a shuttle shaft which is rotatably supported in the bed 22 in the horizontal direction and to which a shuttle 30 is fixed at the left end.
The hook shaft 29 has an oil supply hole 31 formed at the center of the shaft as an oil supply passage.
The right end opens into the oil tank chamber 32 of the bed 22, and a conical adjusting hole 33 is formed in the opening. The main shaft 23 and the vertical axis 28 are bevel gears 3 fixed to the respective shafts in the arm.
4 and 35, and the longitudinal axis 28 and the shuttle shaft 29 are connected by bevel gears 36 and 37 fixed to the shafts in the oil tank chamber 32 of the bed 22, respectively. These bevel gears and the longitudinal axis 28
Is transmitted to the shuttle shaft 29. Reference numeral 38 denotes a stirring plate as atomizing means fixed to the shuttle shaft 29 in the oil tank chamber 32, and its outer peripheral portion is immersed in oil 39 in the oil tank chamber 32. Reference numeral 40 denotes a fan as a blowing means fixed to the shuttle shaft 29 in the oil tank chamber 32. The partition wall 41 of the bed 22 near the fan 40 has a hole 42 for communicating the oil tank chamber 32 with the outside.
Then, the above-described hole 42 and the fan 40 as a blowing means are provided.
And the stirring plate 40 as the atomizing means are provided in the above order from the left. Reference numeral 43 denotes an adjusting screw screwed into the bed 22 as adjusting means. The tip 44 of the adjusting screw faces the adjusting hole 33 of the oil supply hole 31 opened in the oil tank chamber 32, and the flow of the mist oil flowing into the adjusting hole 33 is adjusted by the adjusting screw 43. The present invention is configured as described above, and the operation will be described below. When the pulley 24 is rotated by a drive motor (not shown), the main shaft 23 is rotated, whereby the needle 25 is first moved up and down via the crank mechanism 27 and the needle bar 26, and The longitudinal axis 28 is rotated via gears 34 and 35, and the shuttle shaft 29 is further rotated via bevel gears 36 and 37, and the shuttle 30 is rotated. It is formed. When the shuttle shaft 29 is rotated, the stirring plate 38 and the fan 40 in the oil tank chamber 32 rotate, and the oil 39 in the oil tank chamber 32 is atomized by the outer periphery of the stirring plate 38, and the fan 39 4
0 takes in air from the hole 42, and the pressure in the oil tank chamber 32 becomes higher than the atmospheric pressure. With this pressure, the mist oil in the oil tank chamber 32 is sent from the adjustment hole 33 to the oil supply hole 31, and Lubricate 30. The amount of oil supply can be adjusted by adjusting the gap of the opening of the adjustment hole 33 with the tip end 44 of the adjustment screw 43 to adjust the amount of mist oil sent from the adjustment hole 33 to the oil supply hole 31. it can. In the above-described first embodiment, the fan 40 is provided on the shuttle shaft 29 in the oil tank chamber 32. However, the fan 40 is provided with the main shaft 23 and the vertical shaft 28 that rotates in conjunction with the main shaft 23.
And the like, and the air flow can be guided into the oil tank chamber 32. Further, the stirring plate 38 is not limited to the disk shape, but can be replaced with another shape. Further, in the first embodiment, the adjusting means includes an adjusting screw 43 facing the adjusting hole 33 of the oil supply passage 31 opened to the oil tank chamber 32.
The gap of the adjustment hole 33 is adjusted by the tip portion 44 of. Instead, for example, as shown in FIG. 1, a joint 51 having a hole 50 communicating with the oil supply passage 31 is provided at an intermediate portion of the shuttle shaft 29, and the joint 51 has a gap between the opening of the hole 50. Is provided with an adjusting screw 52 that can adjust the angle. Since the atomized air discharged from the adjusting screw 52 flows into the reserve chamber 53 at the atmospheric pressure, the second adjusting means 51 and 52 adjust the flow rate of the atomized air to the refueling unit minutely. More accurate and responsive operation can be performed. Further, the adjusting means may be provided at a refueling portion side of the refueling passage 31, for example, at an opening on the hook side. Further, it goes without saying that the refueling device of the present invention can be used for refueling other than the refueling of the shuttle. Next, a second embodiment of the present invention will be described with reference to FIG. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Reference numeral 103 denotes an electromagnetic solenoid. A stem 104 is fixed to a tip of the electromagnetic solenoid 103, and a valve seat 105 is fixed to a tip of the stem 104.
The tip of the valve seat 105 has a conical shape, and can be fitted into the opening 33 of the oil supply passage communicating with the oil tank chamber 32.
This electromagnetic solenoid 103 has a CP as an arithmetic processing unit.
It is connected to U102. Then, based on a command from the CPU 102, the electromagnetic solenoid 103 moves back and forth in the horizontal direction. When the electromagnetic solenoid 103 is at the forward position, the tip of the valve seat 105 is fitted into the opening 33 of the oil supply passage, and the oil tank chamber 32 and the oil supply passage 31 are shut off. This interrupted state is referred to as a closed state. A temperature sensor 100 (detection means) for measuring the temperature of the shuttle 30 is fixed to the sewing machine frame 106 facing the front side of the shuttle 30. Although the temperature sensor 100 is close to the shuttle 30, the needle 25 and the shuttle 3
It is in a position that does not prevent the formation of a stitch by zero. The temperature sensor 100 is connected to a CPU 102 (control means) via a temperature controller 101 (control means). The temperature controller 101 is provided with two variable volumes that allow the operator to change the set value, one of which is an upper limit set value and the other is a lower limit set value. Temperature controller 1
01 is a temperature sensor 10 for detecting the temperature of the shuttle (refueling unit).
The output value of 0 is compared with the upper limit value or the lower limit value of the temperature controller 101, and a predetermined signal is sent to the CPU 102. Next, the operation of the second embodiment will be described. First, the electromagnetic solenoid 103 is in the forward position,
The sewing is performed in a closed state where the oil is not supplied to the oil tank chamber 32 and the oil supply path 31. If sewing is continued in this closed state, the amount of oil supplied to the shuttle 30 will decrease, and the shuttle temperature will increase. A temperature sensor 100 detects this pot temperature. The output value of the temperature sensor 100 is the temperature controller 1
When the temperature exceeds the upper limit set value of 01, the temperature controller 101 outputs a rising signal to the CPU 103. The CPU 103 that has received the rising signal energizes the solenoid 103 and moves the valve seat 105 via the stem 104 in the X direction in the figure. Due to the movement of the valve seat 105 in the X direction, the oil tank chamber 32 and the oil supply passage 31 are in an open state in which they are communicated with each other. This open state is maintained, and the shuttle 30 is refueled. Then, when the oil supply to the shuttle 30 is continued, the temperature of the shuttle 30 decreases. Next, when the output value of the temperature sensor 100 becomes smaller than the lower limit set value of the temperature controller 101,
The temperature controller 101 outputs a lowering signal to the CPU 103. The CPU 103 that has received this lowering signal shuts off the solenoid 103 and, through the stem 104, the valve seat 10
5 is moved in the illustrated Y direction. Due to the movement of the valve seat 105 in the Y direction, the oil tank chamber 32 and the oil supply passage 31 are shut off and closed, and the amount of oil supplied to the shuttle 30 decreases.
As described above, when the sewing is continued, the above operation is repeated, and the minute amount of lubrication is intermittently performed without excess or shortage. As described above, in the second embodiment, the adjusting means (the solenoid 103, the opening and closing the opening of the oil supply passage communicating with the oil tank) is opened and closed.
With the provision of the valve seat 105), an appropriate amount of refueling can be performed. Further, detecting means (temperature sensor 100) for detecting the temperature of the refueling unit, and control means (temperature controller 101, control means) for controlling the adjusting means (solenoid 103, valve seat 105) according to the output value of the detecting means. CPU 103),
Was provided. For this reason, it is possible to supply an appropriate amount of fuel to the refueling unit without excess or deficiency. The control means includes a plurality of numerical data comprising an upper limit value and a lower limit value, and controls the adjusting means by comparing the plurality of numerical data with the output value from the detecting means. For this reason, a more appropriate amount of refueling can be performed to the refueling unit without excess or shortage. Further, the control means can change a plurality of numerical data including an upper limit value and a lower limit value. For this reason, the operator can arbitrarily change the numerical data based on the sewing conditions such as the material and thickness of the cloth, so that an appropriate amount of lubrication can be performed. The second embodiment can be variously modified without being limited to the above embodiment. For example, similarly to the first embodiment, it is easily conceivable to provide second adjusting means 51, 52 fixed to the sewing machine frame at an intermediate portion of the shuttle shaft 29. Also, as shown in FIG.
These second adjusting means 51 and 52 are fixed to the sewing machine frame,
It is easily conceivable to use one that rotatably supports the shuttle shaft 29. The control means is a temperature controller 10
1 and the CPU 103, but it is also conceivable to control the solenoid 103 by applying a signal capable of directly inputting a signal from the temperature sensor 100 to the CPU instead. Further, the control means has a plurality of numerical data consisting of an upper limit value and a lower limit value. However, instead of this, it is also easy to control the adjusting means with only one numerical data. Conceivable. That is, it is also conceivable that the control is performed by comparing this one numerical data with the output value of the temperature sensor, and energizing the solenoid 103 for a predetermined time (for example, one minute) to supply oil when the value is large. . It is also conceivable to use an actuator such as an air cylinder instead of the solenoid 103.
In the second embodiment, the electromagnetic solenoid 10 is energized.
3 is in the forward position, the valve seat 10 is inserted into the opening 33 of the oil supply passage.
5, the oil tank chamber 32 and the oil supply passage 31 are fitted.
Is completely shut off. Instead, a notch having a predetermined area is formed in the valve seat 105, and the energized electromagnetic solenoid 1 is formed.
Even when 03 is in the forward position (closed state), it is easily conceivable that the oil tank chamber 32 and the oil supply passage 31 are communicated with each other by the notch so that an extremely small amount of oil is supplied.

As described above, according to the lubricating device of the present invention, the atomizing means is provided inside the sewing machine, and the atomized oil in the oil tank is rotated by the main shaft of the sewing machine to remove the air. The provision of the blowing means for feeding the oil to the oil supply path by pressure provides an effect that the configuration of the entire oil supply device is extremely simplified, and the cost of the oil supply device is reduced. Further, since the pressurized air supply source 5 is not required, the sewing machine having the oil supply device can be used in a sewing factory without the pressurized air supply source 5, so that the use place is not limited. In addition, since the adjusting means for adjusting the flow rate of the atomized oil to the opening is provided at a portion of the oil supply passage that opens in the hollow portion of the oil tank, in addition to the above-described effects, a further small amount of oil can be supplied. It is possible to supply oil accurately and responsively, prevent seizure of the mechanism and perform stable sewing for a long period of time, and does not contaminate the sewn product, thereby improving the commercial value of sewn products. Has the effect.
In addition, since the blowing means and the atomizing means are provided in order in a direction away from the air holes, oil supplied from the air holes to the blowing means is always atomized stably and reliably. The responsivity of refueling is improved, and there is an effect that an appropriate amount of refueling can be performed accurately and quickly. Further, since the atomizing means and the air blowing means are provided on one rotating shaft which rotates in conjunction with the main shaft of the sewing machine, the structure is further simplified in addition to the above-mentioned effects, and the refueling device becomes compact. There is an effect that it can be easily provided inside a narrow sewing machine.

[Brief description of the drawings]

FIG. 1 is a front view showing a cross section of a part of a sewing machine according to a first embodiment of the present invention.

FIG. 2 is a sectional front view of a part of a sewing machine according to a second embodiment of the present invention.

FIG. 3 is a front view showing a cross section of a part of a sewing machine showing a conventional oil supply device.

[Explanation of symbols]

 Reference Signs List 20 sewing machine main body 23 main shaft 28 vertical axis (rotary axis) 29 shuttle shaft (rotary axis) 30 shuttle (oil supply unit) 31 oil supply hole (oil supply path) 32 oil tank chamber (oil tank) 33 adjustment hole 38 stirring plate (atomizing means) 40 fan (blowing means) 43 adjusting screw (adjusting means) 52 adjusting screw (adjusting means) 105 valve seat (adjusting means) 103 solenoid (adjusting means) 100 temperature sensor (detecting means) 101 temperature controller (control means) 102 CPU (control means)

Claims (10)

[Claims] 1. An oil tank containing lubricating oil, and atomizing means fixed to a rotating shaft interlocking with a main shaft of a sewing machine and rotating in the oil tank, for atomizing oil in the oil tank;
It is characterized by comprising an oil supply passage connecting the hollow portion of the oil tank and the oil supply portion, and a blowing means rotating in conjunction with the main shaft of the sewing machine and sending the atomized oil in the oil tank to the oil supply passage by air pressure. The sewing machine spray refueling device. 2. The spraying and lubricating device for a sewing machine according to claim 1, further comprising an adjusting means for adjusting a flow rate of the atomized air to the fueling unit. 3. The spray oil supply device for a sewing machine according to claim 2, wherein said adjusting means adjusts a gap of an opening of an oil supply passage communicating with an oil tank. 4. The spraying and lubricating device for a sewing machine according to claim 1, further comprising an air hole for communicating a hollow portion in the oil tank with the atmosphere. 5. The machine according to claim 1, wherein the atomizing means and the air blowing means are provided on a single rotating shaft which rotates in conjunction with a main shaft of the sewing machine. Spray refueling device. 6. The spraying and lubricating apparatus for a sewing machine according to claim 4, wherein said blowing means and the atomizing means are sequentially provided in a direction away from said air hole. 7. The spray oil supply device for a sewing machine according to claim 2, wherein said adjusting means opens and closes an opening of an oil supply passage communicating with an oil tank. 8. The spraying and refueling device for a sewing machine according to claim 2, further comprising: detecting means for detecting a temperature of the refueling unit; and control means for controlling the adjusting means according to an output value of the detecting means. A spray oiling device for a sewing machine. 9. The spraying and refueling device for a sewing machine according to claim 8, wherein said control means includes a plurality of numerical data comprising an upper limit value and a lower limit value. And controlling the adjustment means by comparing the output values of the sewing machine and the control unit. 10. The machine according to claim 8, wherein said control means includes a plurality of numerical data comprising an upper limit value and a lower limit value, and is capable of changing said plurality of numerical data. A spray refueling device for a sewing machine, comprising: