JP2003236284A - Cooling device of sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device of a sewing machine capable of dispensing with an operating switch and keeping the cooling action even during the stop of the sewing machine. <P>SOLUTION: This cooling device of a sewing machine includes a sewing machine bed 2 on which sewn material is placed, an under cover 22 covering the lower part of the sewing machine bed to form an internal space, a shuttle shaft 9 disposed on the lower part of the sewing machine bed and having a shuttle mounted at the shaft end, a lower shaft (a vertical feed shaft 6) disposed parallel to the shuttle shaft and interlocking with a motor, connecting members (gears 18, 19) interlocking the lower shaft with the shuttle shaft, and a storing part (a gear box 11) storing the connecting members and one end part of the shuttle shaft, the inside of which is filled with lubricating oil, a part of which is fixed to the sewing machine bed. The device further includes a thermal conductive member (a copper plate, a heat pipe 20), one end side of which abuts on the sewing machine heating part (the sewing machine bed 2, a shuttle 10, a head, the storing part 11), the other end thereof being disposed outside of the internal space. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for sewing machines.

[0002]

2. Description of the Related Art In a conventional sewing machine cooling device, a propeller is attached to a driving shaft of a sewing machine and the wind is used to cool the sewing machine. Further, it has been considered that an electric fan driven by an operation switch is used with a power source for a sewing machine as a power source.

[0003]

However, in the case of the propeller type interlocked with the sewing machine drive shaft of the conventional apparatus, the air blowing function is stopped while the sewing machine is stopped, so that cooling may be insufficient. Further, in the case of the electric fan type, if the operation switch is turned on, air is blown even when the sewing machine is stopped, but there is a problem that the operator forgets to turn off the operation switch.

The present invention has been made in order to solve the above-mentioned conventional problems, maintains its cooling action even when the sewing machine is stopped, does not require an operation switch, etc., and prevents the operator from inadvertently making a mistake. An object is to provide a cooling device for a sewing machine.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 defines a sewing machine bed (2) on which a sewn product is placed and a lower part of the sewing machine bed to form an internal space. An under cover (22), a shuttle shaft (9) arranged at the bottom of the sewing machine bed and equipped with a shuttle at its shaft end, and a lower shaft (upper and lower feed shaft) arranged in parallel with the shuttle shaft and interlocked with the motor. 6), a connecting member (gear 18, 19) for interlocking the lower shaft and the shuttle shaft, and the connecting member and one end of the shuttle shaft are housed, and the inside of the sewing machine bed is filled with lubricating oil. In a cooling device for a sewing machine, which includes a storage part (gear box 11) partially fixed to the inside, a sewing machine heat generating part (sewing machine bed 2, shuttle 10,
The heat conducting member (copper plate, heat pipe 2) which is in contact with the head portion and the housing portion 11) and the other end side of which is arranged outside the internal space.
0) and.

According to the first aspect of the present invention, the heat generating portion of the sewing machine is cooled by the heat conducting member. Therefore, even when the sewing machine is stopped, the cooling action is maintained by heat transfer. Further, since the operation switch is not used, the operator does not inadvertently make a mistake.

According to a second aspect of the invention, in the cooling device for a sewing machine according to the first aspect, the sewing machine heat generating portion is the storage portion.

According to the second aspect of the present invention, the shuttle and the sewing machine bed can be cooled at the same time by cooling the storage portion in which the connecting member is stored.

[0009]

DETAILED DESCRIPTION OF THE INVENTION A first embodiment of the present invention is shown in FIG.
A description will be given based on FIG.

The sewing machine 1 includes a sewing machine bed 2 on which a sewing product is placed, a standing leg portion 3 provided upward from the right end side of the sewing machine bed 2, an arm 4 extending from the upper side of the standing leg portion 3 in parallel with the bed. Composed of. A motor 5 is arranged on the right end side of the arm 4, and the motor 5 is driven by operating a foot pedal. The rotation of the motor 5 causes the upper shaft (not shown) to rotate. Sewing machine bed 2 is sewing machine table 2
1 is stored in a predetermined position.

An under cover 22 is provided below the sewing machine bed 2 so as to cover the lower portion of the sewing machine bed. With this undercover 22 and sewing machine bed 2,
An internal space 8 of the sewing machine is formed.

A shuttle shaft 9 is arranged below the sewing machine bed 2 in the horizontal direction. At the left end of the shuttle shaft 9,
The kettle 10 is equipped.

As shown in FIG. 2, a vertical feed shaft (lower shaft) 6 is arranged below the shuttle shaft 9 in parallel with the shuttle shaft 9.
A pulley 7 is fixed to the right end of the vertical feed shaft 6. A timing belt is stretched around the pulley 7 and a pulley provided on the upper shaft. And in conjunction with the motor 5,
The vertical feed shaft 6 rotates.

Further, a gear box (housing portion) 11 is arranged in the internal space 8 of the sewing machine. The gear box 11 has a box shape and is fixed so that an upper side portion 11 a of the gear box 11 contacts the sewing machine bed 2. Left side of gearbox 1
The first mounting hole 11ba is formed in 1b, and the bearing 12
Has been inserted. The right end 9a of the shuttle shaft 9 is fitted into the inner diameter of the bearing 12 and is rotatably supported. An oil seal 13 is attached to the outer surface of the bearing 12,
Oil is prevented from leaking from the inside of the gear box 11 via the shuttle shaft 9. A second mounting hole 11bb is formed below the first mounting hole 11ba so as to penetrate the left and right side portions of the gear box. The bearing 1 is provided on the left side of the second mounting hole 11bb.
4, the outer shape of the bearing 15 is fitted in the right side portion. The vertical feed shaft 6 is fitted in the inner diameter portions of the bearings 14 and 15 and is rotatably supported. Further, the bearings 14 and 15 each have an oil seal 1 for preventing oil leakage.
6 and 17 are equipped respectively.

Inside the gear box 11 (storage part),
Gears 18 and 19 (connecting members) are stored. Gear 1
Reference numeral 8 is fixed to the shuttle shaft right end portion 9a, and gear 19 is fixed to the vertical feed shaft 16. The gears 18 and 19 mesh with each other, and the vertical feed shaft 6 and the shuttle shaft 9 rotate in conjunction with the upper shaft. Further, the gearbox is filled with lubricating oil.

One end 20a of the heat pipe 20 is fixed to the gear box bottom 11c. The other end 20b of the heat pipe 20 is, as shown in FIG. 1, an internal space 8 formed by the sewing machine bed 2 and the under cover 6.
Located outside of.

The heat pipe 20 is a cylindrical hermetic container which is made of a copper alloy having a high thermal conductivity and has a space formed therein. Heat pipe 20 one end side 20a
Is formed in a plate shape and is designed to be easily fixed to the gear box 11 and to have a large heat conduction area. A small amount of liquid, such as water, is vacuum-sealed inside the heat pipe 20 and has a capillary structure on the inner wall.

Next, the operation of the first embodiment will be described. When the sewing machine 1 is driven for a long time, the sewing machine 1 generates heat,
Similarly, the sewing machine bed 2 where the operator operates the cloth, the hook 10 which operates for supplying the lower thread, and the like also generate heat. Further, a gear box 1 in which a vertical feed shaft 6, a part of a shuttle shaft 9 and connecting gears 18 and 19 thereof are built in, and a lubricating oil is sealed inside.
1 also generates heat.

A heat pipe 20 is fixed to the bottom surface 11c of the gear box 11. Therefore, when the gearbox 11 generates heat, the one end side 20a of the heat pipe 20 is heated. By heating, the water inside the heat pipe evaporates, and the steam moves to the other end side 20b (low temperature side) of the heat pipe arranged outside the sewing machine internal space 8. The moved vapor is condensed on the low temperature side opened to the atmosphere, and the condensed liquid is refluxed to the one end side 20a (heating unit) of the heat pipe 20. This series of phase changes occur continuously, and heat is transferred quickly. The gearbox 11 is cooled by this heat transfer. When the gear box 11 is cooled, the sewing machine table 2 abutting on the gear box 11 is also cooled, and the shuttle shaft 9 and the shuttle 10 are also cooled via the enclosed lubricating oil.

According to the first embodiment, the heat pipe 20
The sewing machine heat generating part (gear box 1
Since the cooling of 1) is performed, the cooling action is maintained by heat transfer even when the sewing machine is stopped. Further, since the operation switch is not used, the operator does not inadvertently make a mistake. Further, by cooling the gear box 11 (storage portion) in which the gears 18 and 19 (coupling members) are stored, the shuttle 10 and the sewing machine bed 2 can be simultaneously cooled, and the sewing work environment is improved.

The present invention can be variously modified without being limited to the above embodiment. For example, heat pipe 20
Instead of, a copper plate may be easily used. In addition, an electric fan 23 that blows air toward the other end 20b of the heat pipe 20 that is disposed outside the sewing machine internal space of the first embodiment is provided to easily forcibly cool the low temperature side of the heat pipe. Conceivable.

Further, in the first embodiment, one end side of the heat pipe 20 is fixed to the gear box, but instead of this, for example, one end side individually contacts the shuttle shaft or the sewing machine bed, and the other end side thereof is the sewing machine. It is easily conceivable to provide a plurality of heat conducting members arranged outside the internal space to cool the operator operating portion of the sewing machine.

[0023]

According to the first aspect of the present invention, the heat-generating portion of the sewing machine is cooled by the heat-conducting member, so that the cooling action is maintained by the heat transfer even when the sewing machine is stopped. Also,
Since no operation switch is used, the operator does not accidentally make mistakes.

According to the second aspect of the present invention, the shuttle and the sewing machine bed can be cooled at the same time by cooling the storage portion in which the connecting member is stored, and the sewing work environment is improved.

[Brief description of drawings]

FIG. 1 is a front view of a cooling device for a sewing machine according to the present invention.

2 is a cross-sectional view of the gearbox portion of FIG.

[Explanation of symbols]

2. Sewing machine bed 22 ... Undercover 9 ... Hook shaft 6 ... Vertical feed axis 18 ... Gear (connecting member) 19 ... Gear (connecting member) 11 ... Gearbox (storage unit) 20 ··· Heat pipe (heat conduction member)

Claims (2)

[Claims] 1. A sewing machine bed on which a sewn product is placed, an undercover that covers the lower part of the sewing machine bed and forms an internal space, and a shuttle shaft that is arranged at the lower end of the sewing machine bed and is equipped with a shuttle at its shaft end. And a lower shaft which is arranged in parallel with the shuttle shaft and which interlocks with the motor, a connecting member which interlocks the lower shaft and the shuttle shaft, and the connecting member and one end of the shuttle shaft are housed and internally lubricated. In a cooling device for a sewing machine, which is filled with oil and has a storage part partially fixed to the sewing machine bed, one end side is in contact with the sewing machine heat generating part and the other end side is arranged outside the internal space. A cooling device for a sewing machine, comprising a heat conducting member. 2. The sewing machine cooling device according to claim 1, wherein the sewing machine heat generating portion is the storage portion.