JP2002035463A - Grease supplying apparatus of sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grease supplying apparatus of a sewing machine which can prevent seizure and wearing without an additional lubricant at sliding parts of the sewing machine not to cause the contamination of cloths. SOLUTION: This is a grease-supplying apparatus 1 of a sewing machine which apparatus supplies a grease to a sliding position 20 where parts relatively slide on each other along with the movements of parts such as sliding movement, rotation movement and the like. This apparatus has a grease cylinder 3 in which a grease consisting of a lubricant oil and a thickener is stored, a pipe 4 which connects the grease cylinder 3 and the sliding position 20 of the sewing machine, and a piston member 50 which can move back and forth in the grease cylinder 3 and can push out the grease in the grease cylinder 3 to the pipe 4. The grease is supplied to the sliding position 20 of the sewing machine when the piston member 50 pushes out the grease from the grease cylinder 3 to the pipe 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly aims at eliminating the need for lubrication in a sliding portion of a sewing machine, in which parts slide relatively to each other in accordance with the movement of parts such as sliding movement and rotation movement in an industrial sewing machine. The present invention relates to a grease supply device of a sewing machine.

[0002]

2. Description of the Related Art Conventionally, a driving unit of an industrial sewing machine having many parts (hereinafter, referred to as a sewing machine sliding part) in which parts that slide or rotate with high speed and high load come into contact with each other while rubbing is mainly used. And a shaft and a bearing. The configuration of the shaft and the bearing is generally a combination of metal materials, and is often configured to supply lubricating oil so as not to cause seizure and abnormal wear (for example, fretting wear) between the metal materials. .

When lubricating oil is supplied to a sliding portion of an industrial sewing machine, the lubricating oil is also deteriorated by heat generated by friction at the sliding portion. There is. The forced oil supply means includes, for example, an oil distribution path for supplying lubricating oil to the sliding portion, an oil pan for storing lubricating oil, a pump for pumping lubricating oil, and the like. According to such a configuration, lubricating oil can be pumped up from the oil pan and circulated and supplied to each sliding portion via the oil distribution path. By the way, in the sewing machine having the above-described configuration for supplying the lubricating oil to the sliding portion of the sewing machine, for example, when the supply amount of the lubricating oil has increased, the needle bar which operates at a high speed may be reciprocated up and down. However, there is no possibility that the lubricating oil splatters around when the balance swings or the needle bar crank rod rotates.
Conversely, when the supply amount of the lubricating oil is reduced, there is no possibility that abnormal wear or seizure of the sliding portion of the sewing machine occurs. Further, as described above, when the oil supply means for supplying the lubricating oil to the sliding portion of the sewing machine is provided, the number of parts of the sewing machine increases, which not only leads to an increase in manufacturing load and an increase in cost. In addition, the weight of the sewing machine may be increased. In view of these points, there has been a demand for oil-free sewing machine sliding parts. Therefore, in order to eliminate the need for lubrication, a coating process (for example, a ceramic film such as TiN or DLC, and a MoS2 or Teflon (registered trademark) coating for lubrication) is applied to the surface of the metal material serving as the sliding surface of the sliding portion. Attempts have been made to adopt a configuration using an oil-impregnated sintered alloy material, a wear-resistant resin material, or CFRP (carbon fiber reinforced resin).

[0004]

However, the above-mentioned coating on the surface of the metal material has been required for a long period of use.
There was a risk that the coating would wear or peel off and lose its effect. In addition, since a conventional wear-resistant resin material generally has a large coefficient of thermal expansion, there is a case where deformation due to heat generated due to slide movement, rotational movement, or the like becomes large. Further, when a conventional oil-impregnated sintered alloy material is used, it cannot be formed into a long thin part, for example, a shaft part such as a needle bar or a looper holder, due to its properties. In addition, the conventional wear-resistant resin material generally requires a device for processing in order to obtain sufficient dimensional accuracy and is easily worn. As described above, even if the method of making oil-free by the surface treatment as described above is performed, heat is generated, seizure occurs, or wear occurs unless the friction coefficient of the sliding portion becomes zero, so that it can be operated only for a short time. There was a problem. In addition, in the case of forced lubrication or minute lubrication to the sliding portion, the oil may stain the cloth. Furthermore, there is a method of using grease for the sliding part,
Normally, grease is used after being applied to the sliding surface. If the grease runs out on the sliding surface, the same problem as described above occurs. Therefore, as described above, it has not been possible to sufficiently eliminate the need for lubrication of the friction sliding portion of the industrial sewing machine.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a grease supply for a sewing machine that can sufficiently achieve oil-free operation without causing seizure or wear of sliding portions of the sewing machine and generation of cloth stains. It is to provide a device.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a sewing machine sliding part in which parts slide relative to each other in accordance with the movement of parts such as sliding movement and rotational movement. A grease supply device (1) of a sewing machine for supplying grease to (20), for example, as shown in FIG.
A grease storage section (for example, a grease cylinder 3) for storing grease composed of a lubricating oil and a thickener, a supply path (for example, a pipe 4) for communicating the grease storage section with a sewing machine sliding section, and the grease storage section. A piston member (50) provided so as to be able to advance and retreat in the portion, and capable of pushing out grease in the grease storage portion to the supply path;
Grease is supplied to the sliding portion of the sewing machine by the piston member pushing grease from the grease storing section to the supply path.

In general, lubricating oil is a generic term for petroleum-based lubricating oils and synthetic oils, and grease is obtained by adding thickeners and additives such as soap to lubricating oil (base oil). . Hardness is generated by adding a thickener to lubricating oil, and the viscosity is higher than that of lubricating oil.
Grease-containing soaps include beef tallow and castor oil-based lithium soaps, and have an oil content of about 85 to 90%.

In the sewing machine grease supply apparatus according to the first aspect, the grease is pushed out of the grease storage section into the supply path by operating the piston member and supplied to the sewing machine sliding section. Grease can be supplied to the sliding portion of the sewing machine only by pushing grease from the grease storage section into the supply path. Therefore, only by operating the piston member automatically and manually,
Grease can be permanently supplied from the grease reservoir to the sliding portion of the sewing machine, and there is no seizure or wear caused by running out of lubrication between sliding components in the sliding portion of the sewing machine. Further, since the grease is supplied to the sliding portion of the sewing machine instead of the lubricating oil, a forced lubricating means (for example, an oil distribution path) for forcibly supplying the lubricating oil to the sliding portion of the sewing machine is different from the related art. , An oil pan, a pump, etc.), the wear resistance and seizure resistance of the sliding portion of the sewing machine can be improved, and the sewing machine can be made to be oil-free, that is, completely dry. Also, unlike the related art, since no forced oil supply means such as an oil pan is required, the weight of the sewing machine can be reduced accordingly. Further, since the lubricating oil is not supplied to the sliding portion of the sewing machine, the oil does not splash and the cloth is not stained, and the work place is not stained.

The sliding portion of the sewing machine in which the components slide relative to each other (contact with friction) is not limited. For example, the shaft and the bearing used in the driving portion of the sewing machine may be used. Including configuration. In this case, the shapes and operations of the shaft and the bearing are not limited. That is, for example, the operation of the shaft includes the case of linearly sliding and reciprocating in the direction along the direction of the axis, the operation of rotating along the center of the axis, and the operation of sliding. It also includes the operation of rotating while moving. The shaft and the bearing of the drive unit of the sewing machine include, for example, an upper looper hugging and an upper looper hugging guide, an upper looper hugging guide and an upper looper hugging support, an upper looper driving shaft and a bearing, one end of which is a shaft. Examples include a feed link that is rotatably connected, a balance slide bearing, an upper shaft and a lower shaft and a bearing, and the like.
Oil-free operation can be suitably achieved.

[0010] The shape and operation of the shaft and the bearing may be, for example, such that a cylindrical shaft for sliding or rotating in the axial direction or a combination of the two, and a cylindrical inner cylinder for inserting the shaft. The bearing may have a configuration in which a shaft having an arbitrary cross-sectional shape that slides linearly in the length direction can be received by a bearing having a portion, and an inner cylindrical portion having a shape matching the cross-sectional shape of the shaft. It may be a configuration to receive in.
As the configuration of the sliding part, one of the two parts forming the sliding part that come into contact with each other is an annular part provided in an annular shape, and the other part is formed along the inner surface of the annular part. A configuration in which a shaft-shaped component is provided that is rotatably moved in the direction or that slides in the axial direction along the inner surface of the annular component is provided.

According to a second aspect of the present invention, in the grease supply device for a sewing machine according to the first aspect, for example, as shown in FIG. 1, a grease amount detecting means (for example, a position detecting device) for detecting the amount of grease in the grease storing portion. Sensor 71, lamp 7
2, buzzer 73, control means 6, etc.).

According to the grease supplying device for a sewing machine according to the second aspect, the same effect as the invention according to the first aspect can be obtained, and the amount of grease in the grease storing section is detected by the grease amount detecting means. Therefore, the grease amount can be confirmed by the grease amount detecting means, and the grease can be appropriately replenished to the grease storing section. Therefore, the grease supplied to the sliding portion of the sewing machine can be prevented from running out.

More specifically, the grease amount detecting means includes a position sensor for detecting a moving position of a piston member for changing the amount of grease in the grease storing portion by moving forward and backward, and detecting the position sensor for an operator or the like. A buzzer or a lamp for notifying is provided.

According to a third aspect of the present invention, there is provided the first or second aspect.
In the grease supply device for a sewing machine described above, for example, as shown in FIG. 1, an actuator (for example, a solenoid 5) for operating the piston member in the grease reservoir, and a control means (6) for controlling the actuator
It is provided with.

In the grease supply device for a sewing machine according to the third aspect, the same effect as the first or second aspect of the invention can be obtained, and the piston member is operated in the grease storing section by the control means. The grease can be pushed out of the grease reservoir to the supply path and supplied to the sewing machine sliding part by operating the piston member by the control means. Therefore, grease is automatically supplied to the sliding portion of the sewing machine, seizure and abrasion are prevented, lubrication is eliminated, and parts can be slid smoothly.

According to a fourth aspect of the present invention, in the sewing machine grease supply apparatus according to the third aspect, for example, as shown in FIG. 1, a rotation speed detecting means (9) for detecting a rotation speed of the sewing machine is provided, The control means controls the actuator based on the detection of the rotation speed of the sewing machine by the rotation speed detection means.

According to the grease supply device for a sewing machine according to the fourth aspect, the same effect as that of the invention according to the third aspect can be obtained, and the control means controls the rotation speed of the sewing machine by the rotation speed detection means. The grease is extruded from the grease storing section to the supply path by supplying the grease from the grease storing section to the sewing machine sliding section, by controlling the actuator based on the detection of. Therefore, the grease can be supplied to the sewing machine sliding portion based on the rotation speed of the sewing machine. That is, by supplying grease to the sewing machine sliding portion when the rotation speed of the sewing machine reaches the predetermined sewing machine rotation speed, it is possible to prevent burning and abrasion of the sewing machine sliding portions that slide with each other with the sewing machine rotation speed. For example, when the rotation number detecting means detects one million rotations, grease is supplied to the sliding portion of the sewing machine by the control means based on the detection of the rotation number. As a result, permanent lubrication of the sliding portion of the sewing machine can be realized.

The invention according to claim 5 is the invention according to claim 3 or 4.
The grease supply device for a sewing machine described above includes, for example, as shown in FIG. 1, a temperature detecting unit (for example, a temperature sensor 81, a lamp 82, a buzzer 83, and a control unit 6) for detecting a temperature of a sliding portion of the sewing machine. The control means controls the actuator based on the temperature detection of the sewing machine sliding portion by the temperature detection means.

According to the fifth aspect of the present invention, the same effect as that of the third or fourth aspect can be obtained, and the control means controls the sewing machine sliding by the temperature detecting means. The actuator is controlled based on the detection of the temperature of the moving part, and the grease is pushed out from the grease storing part to the supply path by supplying the grease to the sewing machine sliding part by operating the piston member. Therefore, the grease can be supplied to the sewing machine sliding portion based on the temperature of the sewing machine sliding portion.
That is, when the temperature of the sliding portion of the sewing machine reaches a predetermined temperature (a temperature set in advance so that the sliding parts do not seize due to friction), the grease is supplied to the sliding portion of the sewing machine, and the grease is supplied to the sewing machine. It is possible to prevent the parts sliding on each other in the sliding part from burning and abrasion. For example, when the predetermined temperature is 60 ° C., when the temperature detection unit detects that the temperature of the sewing machine sliding unit is 60 ° C., the grease is supplied to the sewing machine sliding unit.
It is possible to set a suitable temperature such as 40 ° C. to 50 ° C. which does not cause seizure.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a grease supply apparatus for a sewing machine according to the present invention will be described below with reference to FIGS.

<First Embodiment> First, the configuration will be described. As shown in FIG. 1, a grease supply device 1 of a sewing machine according to a first embodiment provided on a sewing machine includes a sewing machine sliding portion 20 of an upper looper unit 2 provided in the sewing machine, and a grease cylinder (grease storage) for storing grease. Part) 3
And a pipe (supply path) 4 for communicating the grease storage section 3 with the sewing machine sliding section 20, and a pipe (supply path) 4 that is provided so as to be able to advance and retreat within the grease cylinder 3, and can push out grease in the grease cylinder 3 to the supply path 4. A piston member 50, a solenoid (actuator) 5 for driving the piston member 50, a control means 6 for controlling the solenoid 5, a position sensor (grease amount detecting means) 71, a lamp 72, a buzzer 73, and a temperature sensor (temperature (Detection means) 81, a lamp 82, a buzzer 83, a rotation speed detection means 9, and the like.

In the upper looper unit 2 (shown in a front view in FIG. 1), an upper looper support 21 is provided in a direction orthogonal to a shaft (not shown) rotatably mounted on the sewing machine main body. An upper looper holding guide 22 having a circular cross section is rotatably supported in the support 21. An intermediate portion of the sliding shaft 23a of the upper looper hanger 23 is inserted into the upper looper support 21 and the upper looper hugging guide 22, and is slidably held. A tubular grease supply passage portion 41 extending in the left-right direction so as to be orthogonal to the longitudinal direction of the upper looper hanger 23 is provided in the upper looper hugging guide 22 at a portion facing the intermediate portion of the sliding shaft 23a. Has been established. The grease supply passage 41 is provided with the grease guide tube 4.
The grease guide pipe 42 and the grease guide pipe 42 constitute the pipe 4.

Upper looper holding guide 22 and upper looper holding 2
The surface (sliding surface) of the upper looper holding guide 22 and the upper surface of the upper looper support 21 (sliding surface) are sewn on a sewing machine. A moving part 20 is configured, and grease is supplied to these sewing machine sliding parts 20 from a grease supply passage part 41.

The grease cylinder 3 has a hollow portion capable of storing grease, and is formed of a cylinder having both openings closed by side plates. And one end of the grease guide tube 42 is connected to one side plate so as to communicate with the hollow portion,
On the other side plate, a rod portion (to be described later) whose tip is connected to a piston member 50 fitted inside the grease cylinder 3
53 is inserted. The grease used in this embodiment is obtained by adding a thickener to lubricating oil, which is generally used, and has higher viscosity than lubricating oil.

The piston member 50 is provided in the hollow portion, that is, inside the grease cylinder 3 so as to be able to advance and retreat from the other side plate side to the one side plate side. The grease in the grease cylinder 3 is pushed out to a grease supply pipe. That is, as the piston member 50 moves forward, the amount of grease in the grease cylinder 3 decreases, and the amount of the grease changes. The rod portion 53 is provided so as to be able to advance and retreat by the operation of the solenoid (actuator) 5, and is configured to be manually operable. That is, the rod portion 53 can be arbitrarily advanced or retracted by being connected to the lever 55 and operating the lever 55 regardless of the movement of the solenoid 5. In this configuration, for example, one end of the lever 55 is rotatably attached to the sewing machine main body, and a gear is attached to one end of the lever 55 so as to be coaxial with the rotation axis of the different end. The rack part that engages with the rod part 53
And a predetermined length in the extending direction of the rod portion 53 on the outer peripheral surface of the rod. Further, a lever is attached integrally with the rod portion 53, and the lever is attached to the rod portion 53.
The rod portion 53 itself may be moved by moving the rod portion 53 in the forward and backward directions.

The solenoid (actuator) 5 includes a main body 51 and a movable core 5 provided in the main body 51 so as to be able to advance and retreat.
2 and the moving core 52 is joined to the rod 53 so as to have the same axis. The solenoid of this embodiment moves the moving core by air, but is not limited to this, and may be constituted by a hydraulic solenoid or an electromagnetic solenoid. When the switch 58 is turned on, the solenoid 5 advances the moving core 52, that is, advances the rod 53. Thereby, the piston member 50 advances within the grease cylinder 3.

As described above, the pipe 4 is connected to the grease guide tube 42 for guiding the grease in the grease cylinder 3 to the upper looper unit, and is connected to the grease guide tube 42.
The sliding portion 20 includes a grease supply passage 41 connected to grease. The grease guide tube 42 and the grease supply passage 41 connect the grease cylinder 3 and the sewing machine sliding portion 20 in a communicating state, and guide the grease pushed out from the grease cylinder 3 to the sewing machine sliding portion 20. The rotation speed detecting means 9 includes a sewing machine main shaft encoder that detects the rotation speed of the upper shaft (main shaft) of the sewing machine (not shown).

The position sensor 71 is provided in the sewing machine main body, and detects whether the forward position of the rod 53 has reached a predetermined position. The predetermined position is a position where the piston member 50 is installed so that the grease in the grease cylinder 3 is not pushed out to the grease guide tube 42 as the rod portion 53 advances. The position sensor 71 constitutes the grease amount detecting means 7 together with the control means 6, the lamp 72 and the buzzer 71. In addition, the lamp 72 and the buzzer 73 emit and emit light based on a signal detected from the position sensor 71, respectively. Temperature sensor 81
Is provided near the sewing machine sliding portion 20 of the upper looper unit 2 to detect the temperature of the sewing machine sliding portion 20. The temperature sensor 81 constitutes the temperature detecting means 8 together with the control means 6, the lamp 82 and the buzzer 83. The lamp 82 and the buzzer 82 emit and emit light, respectively, based on a detection signal detected by the temperature sensor 81.

The control means 6 has a CPU 61, RA
M62, ROM 63, I / O port 64, and the like. These CPU 61, RAM 62, and ROM 63 are provided with I / O port 64 via solenoid 5, rotation speed detecting means 9, position sensor 71, lamp 72, buzzer 73, and temperature. Sensor 8
1, a lamp 82, a buzzer 83 and the like are electrically connected.

The control means 6 reads respective output signals from the sewing machine spindle encoder, the position sensor 71, the temperature sensor 81 and the like of the rotation speed detecting means 9 and converts these signals into a plurality of program data stored in a ROM 63 described later. Switch 58 to drive the solenoid 5 based on
To output an ON signal. The RAM 62 has a storage area for various data, a work area for the CPU 61, and the like. A plurality of program data are stored in the ROM 63. The stored plurality of program data is obtained by counting the number of rotations of the sewing machine and switching the switch 58 with a predetermined count.
Switch 58 based on a program signal for outputting an ON signal to drive the solenoid 5 and a signal of a predetermined temperature.
, And program data for driving the solenoid 5 by outputting an ON signal.

That is, the control means 6 detects the rotational speed of the upper shaft based on the signal output from the main spindle encoder of the sewing machine, and compares the detected rotational speed of the upper shaft of the sewing machine with a plurality of data stored in the ROM 63. Then, if the predetermined number of rotations that require grease emergency, here 1 million rotations,
An ON signal is output to the switch 58, whereby the solenoid 5 moves the moving core 52 forward to operate the piston member 50 via the rod portion 53, thereby pushing grease to the grease guide tube 42. Then, the grease pushed out by the grease guide tube 42 is supplied to the sewing machine sliding portion 20 through the grease supply passage portion 41.

Further, the control means 6 determines whether or not the temperature of the sliding section is a dangerous temperature based on a signal detected by a temperature sensor 81 provided near the sliding section 20 of the sewing machine. The dangerous temperature is a temperature set in advance so that parts sliding on the sewing machine sliding portion 20 do not cause seizure due to friction, for example, 60 ° C. If it is a dangerous temperature, an ON signal is output to the switch 58 based on the program data stored in the ROM 63, and the solenoid 5
Drive. Further, the control means 6 includes a position sensor 71
When a position detection signal is input from the controller, a signal is output to the lamp 72 and the buzzer 73 based on the signal, and the lamp 72 and the buzzer 73 emit light and generate sound, so that the amount of grease in the grease cylinder 3 is small for the worker. Make sure that Thereby, the operator can replenish the grease cylinder 3 with grease.

In the sewing machine grease supply device 1 configured as described above, when the sewing machine rotation speed reaches a predetermined rotation speed, for example, 1,000,000 rotations, or when the temperature of the sewing machine sliding portion 20 is a predetermined temperature, For example, when the temperature reaches 60 ° C., the solenoid 5 is operated by the control means 6 so that the piston member 50
Thus, grease can be pushed out of the grease cylinder 3 to the pipe 4, and grease can be supplied to the sewing machine sliding portion 20 via the pipe 4. For example, the sewing machine sliding section 2
When the temperature of 0 is 60 ° C., the temperature becomes 50 ° C. by supplying grease. In this embodiment, the sliding surfaces of the upper looper holding guide 22 and the sliding shaft 23a of the upper looper holding 23, and the upper looper holding guide 22 and the upper Seizure and abrasion between sliding surfaces with the looper support 21 can be prevented, and both parts can slide smoothly.

In the above embodiment, the lamps 72 and 82 and the buzzers 73 and 83 are configured to emit and emit light by the control means 6, but the present invention is not limited to this. , The lamp 72 and the buzzer 73 and the lamp 82 and the buzzer 83 may emit and emit light based on the position detection signal and the temperature detection signal from the position sensor 71 and the temperature sensor 81, respectively.

The grease capacity in the grease cylinder 3 is an amount by which the piston member 50 can push out a necessary and sufficient amount of grease in the sewing machine sliding portion 20 once or a plurality of times. The grease of the grease cylinder 3 may be such that the sewing machine sliding portion 20 is pushed out in a necessary and sufficient amount by the piston member 50 in a stepwise manner. At this time, the piston member 50 operates so as to be able to advance stepwise in the grease cylinder 3, and it is preferable that the piston member 50 operates by driving a motor or the like. Further, a grease tank for filling grease may be connected to the grease cylinder 3. In such a configuration in which the grease tank is connected to the grease cylinder 3,
If the grease in the grease cylinder 3 has the necessary and sufficient amount of the sewing machine sliding portion 20 for one time or a plurality of times, the solenoid 5 pushes the necessary and sufficient amount of the sewing machine sliding portion to the pipe 4. The grease cylinder 3 can be replenished with the amount of grease pushed out of the grease tank into the grease cylinder 3 while the solenoid is retracted by the control means. Further, the sewing machine sliding portion 20 and the like are also optional, and if the parts slide in the sewing machine, that is, the parts in which the parts come into contact with each other while rubbing each other, other specific detailed structures and the like may be appropriately used. Of course, it can be changed. Another example of the sewing machine sliding portion to which grease is supplied is shown in a second embodiment.

<Second Embodiment> FIG. 3 shows a grease supply device for a sewing machine according to the present invention applied to a needle swing sewing machine. This is a portion where the shaft portion for shaking and the bearing come into contact with each other while rubbing. The grease supply device of the sewing machine in this needle swing sewing machine differs only in the configuration of the sewing machine sliding portion, and the other components have substantially the same configuration as the grease supply device 1 of the sewing machine described above. Therefore, only different configurations will be described, and description of similar configurations will be omitted using the same names.

The needle swing sewing machine 100 shown in FIG. 3 includes a grease supply device having the same configuration as that described above. The grease supply device is provided with a grease cylinder for storing grease composed of lubricating oil and a thickener, a supply pipe 110 for communicating the grease cylinder with the sliding portion of the sewing machine, and a movable grease cylinder. Piston member that can push out the grease of the
A position sensor for detecting the amount of grease in the grease cylinder, a solenoid (actuator) for operating the piston member, a control means for controlling the actuator, a sewing machine speed detection means, and a temperature of the sliding portion provided near the sliding portion is detected. Temperature sensor and the like. The control means controls the solenoid to operate the piston member in the grease cylinder and to supply the grease in the grease cylinder to the supply pipe 11.
Grease is supplied to the sewing machine sliding portion 120 by extruding the grease to zero.

The control means, like the control means described above, switches when the rotation speed of the sewing machine reaches a predetermined rotation speed or when the temperature of the sliding portion of the sewing machine reaches a predetermined temperature. An ON signal is output to 58 to operate the moving core of the solenoid, operate the piston member via the rod portion,
Grease is supplied to the sliding portion 120 of the sewing machine. Supply pipe 11
Reference numeral 0 denotes a main pipe 111 having one end connected to a grease cylinder (not shown), and one end connected to the other end of the main pipe 111, and the other end connected to a grease supply pipe part 123 described later.
And a branch pipe 112 connected to the main body. These branch pipes 1
Reference numeral 12 is branched in a state of being connected to the main pipe 111 via a branch portion 113.

The sliding portion 120 of the sewing machine is
1 and a shaft portion 121 disposed in the sewing machine arm 101 in parallel with the extending direction of the sewing machine arm 101, and the shaft portion 121 is fitted in the sewing machine arm
Bearing portions 122, 1 slidably supported in the extension direction of
22. The shaft portion 121 is connected to a sewing machine motor (not shown) on the base end portion 121a side, and is capable of moving forward and backward in the extending direction of the sewing machine arm 101 with the rotation of the motor. Also, the tip 12 of the shaft 121
1b is provided with a needle bar support 141 for supporting the needle bar 140. The needle bar 140 is swung right and left by the shaft portion 121 moving forward and backward in the extending direction (the direction of the double arrow).

The bearing portion 122 is provided with a grease supply portion 123 for supplying grease to an inner peripheral surface 122a that comes into frictional contact with the outer peripheral surface 121c of the shaft portion 121. The grease supply unit 123 is connected to the branch pipe 112,
Grease from the branch pipe 112 is stored, and the grease is applied to the outer peripheral surface 121c of the shaft portion 121 and the inner peripheral surface 1 of the bearing portion 122.
22a, the friction coefficient of the sliding portion between the shaft portion 121 and the bearing portion 122 is reduced to prevent seizure and wear. Although not shown, when the position sensor detects a position where the amount of grease in the grease cylinder is exhausted by the position sensor, the needle swing sewing machine 100 emits light and emits a sound based on the detected signal to perform work. There are lamps and buzzers to inform the people. When a temperature sensor that detects the temperature of a sliding portion between the shaft portion 121 and the bearing portion 122 detects a dangerous temperature at which seizure or abrasion may occur, light emission and sound generation are performed based on the detected signal. In addition, a lamp and a buzzer for notifying the worker are provided.

In this manner, the components constituting the sewing machine sliding portion 120, that is, the outer peripheral surface 121 of the shaft portion 121
Supplying grease to the sliding portion 120 based on the temperature of the inner peripheral surface 122a of the bearing portion 122 and the bearing portion 122, and the rotation speed of the sewing machine, to prevent seizure and wear of parts constituting the sliding portion. And both parts can slide smoothly. Although the solenoid is shown as the actuator, an air cylinder, a linear motor, a stepping motor, or the like may be used.

[0042]

As described above, according to the grease supplying apparatus for a sewing machine according to the first aspect of the present invention, the grease is supplied to the sliding portion of the sewing machine only by pushing the piston member out of the grease storing section into the supply path. Grease can be supplied from the grease reservoir to the sewing machine sliding part permanently by simply operating the piston member automatically or manually, and lubrication between sliding parts in the sewing machine sliding part can be achieved. There is no seizure or wear caused by the cut. Also, unlike the related art, since no forced oil supply means such as an oil pan is required, the weight of the sewing machine can be reduced accordingly. Furthermore, since lubricating oil is not supplied to the sliding part of the sewing machine, the oil scatters and the cloth becomes dirty,
The workplace is not dirty.

According to the grease supply device of the sewing machine according to the second aspect, the grease amount can be confirmed by the grease amount detecting means, and the grease can be appropriately replenished to the grease storing section.
Therefore, the grease supplied to the sliding portion of the sewing machine can be prevented from running out.

According to the grease supplying device for a sewing machine according to the third aspect, the grease can be pushed out of the grease storing section to the supply path by supplying the grease to the sliding section of the sewing machine by operating the piston member by the control means. Grease is supplied to the sliding portion of the sewing machine to prevent seizure and abrasion of the sliding portion of the sewing machine.

According to the present invention, the control means controls the actuator based on the detection of the number of revolutions of the sewing machine by the number of revolutions detecting means, and operates the piston member to store the grease. From the section to the supply path and supply it to the sewing machine sliding section. Therefore, grease can be supplied to the sewing machine sliding portion based on the rotation speed of the sewing machine.

According to the present invention, the control means controls the actuator based on the detection of the temperature of the sliding portion of the sewing machine by the temperature detection means, and operates the piston member to grease the grease. It is extruded from the storage section to the supply path and supplied to the sliding section of the sewing machine. Therefore, grease can be supplied to the sliding portion of the sewing machine in accordance with the temperature of the sliding portion of the sewing machine.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a main part of a grease supply device of a sewing machine as an example to which the present invention is applied.

FIG. 2 is a block diagram of a grease supply device of the sewing machine.

FIG. 3 is a partial cross-sectional view of the sewing machine illustrating a sewing machine sliding unit in a grease supply device for the sewing machine according to a second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Grease supply apparatus 3 Grease cylinder (grease storing part) 4 Pipe (supply path) 5 Solenoid (actuator) 6 Control means (rotation speed detection means / grease amount detection means / temperature detection means) 9 Rotation speed detection means 20 Sewing machine sliding Part 50 Piston member 71 Position sensor (grease amount detecting means) 72 Lamp (grease amount detecting means) 73 Buzzer (grease amount detecting means) 81 Temperature sensor (temperature detecting means) 82 Lamp (temperature detecting means) 83 Buzzer (temperature detecting means) )

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B150 AA01 AA07 AA08 CC07 CE08 CE09 CE26 GB05 GB08 GD12 GD14 GD22 GD25 GD26 GF02 GG02 GG07 JA11 LA00 LA85 LA88 LB01 NA80 NB18 NC11 QA06

Claims (5)

[Claims] 1. A grease supply device for a sewing machine for supplying grease to a sliding portion of a sewing machine in which parts slide relative to each other in accordance with movement of parts such as sliding movement and rotation movement. A grease storage unit for storing grease made of a chemical agent, a supply path communicating the grease storage unit with the sewing machine sliding unit, and a supply path provided to be movable forward and backward in the grease storage unit, and supplying the grease in the grease storage unit to the grease storage unit. A grease supply device for a sewing machine, wherein grease is supplied to the sliding portion of the sewing machine by extruding grease from the grease reservoir to the supply passage. . 2. The grease supply device for a sewing machine according to claim 1, further comprising: a grease amount detection unit configured to detect a grease amount in the grease storage unit. 3. The sewing machine grease supply device according to claim 1, further comprising: an actuator for operating the piston member in the grease storing section; and control means for controlling the actuator. Grease supply device. 4. The sewing machine grease supply device according to claim 3, further comprising a rotation speed detection unit that detects a rotation speed of the sewing machine, wherein the control unit detects the rotation speed of the sewing machine by the rotation speed detection unit. A grease supply device for a sewing machine, wherein the grease is pushed out of the grease reservoir into a supply path by controlling the actuator based on the actuator. 5. The sewing machine grease supply device according to claim 3, further comprising a temperature detecting unit configured to detect a temperature of the sewing machine sliding unit, wherein the control unit controls the temperature of the sewing machine sliding unit by the temperature detecting unit. A grease supplying apparatus for a sewing machine, wherein the actuator is controlled based on a temperature detection.