JPH0725200Y2 - Silencer for ironing board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a sound deadening device for an ironing board, which is related to a sound deadening technology for a suction type ironing board installed in parallel on an industrial sewing machine.

[Conventional technology]

Conventionally, as an industrial sewing machine, it sucks from the table surface, adsorbs the cloth material to be ironed to the table surface and shapes it, and has the function of rapidly cooling the heat from ironing, so-called "vacuum board" suction A sewing machine having a structure with an ironing board is used. As shown in FIG. 5, the ironing board of the sewing machine comprises an ironing board 51 covered with a breathable skin material, and a suction device 53 provided on a leg 52 of the sewing machine 50, which are connected to each other through a bellows tube 54. The suction device 53 communicates the suction port of the blower case 55 with the bellows tube 54, and the discharge port with an exhaust port 56 opened at the rear of the sewing machine through a duct 57. The impeller fan 58 housed in the blower case 55 is rotationally driven by the blower motor 59, and the air sucked from the surface of the ironing board 51 is discharged from the exhaust port 56.

[Problems to be solved by the device]

However, in the conventional suction device 53 with the above configuration, the blower case
55 and the duct 57 are generally structured by metal sheet processing, and the vibration of the impeller fan 58 and the blower motor 59 is propagated and expanded to the blower case 55 and the duct 57 to become a noise source and the exhaust port 56 The working environment was poor because it was located at a relatively high position and opened near the ear of the worker. If a muffler is provided in the middle of the duct, the exhaust path becomes long and the device becomes large.

Further, in the conventional suction device 53, the blower motor 59 is inverter-controlled to adjust the suction force of the ironing board 51, which causes a problem that the device becomes expensive.

The present invention has been made in view of the above problems, and provides a sound-deadening device for an ironing board which is small in size, excellent in sound deadening, and capable of adjusting the suction force of the ironing board with a simple structure, and which is inexpensive. It is intended.

[Means for Solving the Problems]

The muffler for an ironing board according to the present invention includes an ironing board, which is formed with a ventilating passage such as a split horse or a flat board and communicates with an inner cavity and is provided with a breathable skin material, and a suction device which communicates with each other through a bellows tube. However, in a vacuum type ironing board provided with a blower and a blower motor that draw in air from the surface of the ironing board, it is bent into a U-shape or a U-shape so as to continue from the outlet of the blower, and the air vent is open to the lower side for noise reduction. The gist of the present invention is to provide a muffling section formed of a foamable synthetic resin forming a passage.

Further, it is preferable that the exhaust port of the blower is provided with suction force adjusting means capable of adjusting a ventilation amount, and the back pressure of the blower is controlled to adjust the suction force in the ironing board.

[Action]

When an ironing board is used, the air is taken in from the surface of the ironing board that is in communication through the bellows tube while driving the blower motor of the suction device. Is released through the atmosphere opening port.

At this time, the intake / exhaust sound generated by the blower is generated by the muffling air passage when passing through the muffling air passage of the muffling section formed by the foamable synthetic resin (low-foam urethane resin, polystyrene foam resin, polyethylene foam resin, etc.). The noise is reduced by the sound deadening effect, and since the suction device, which is a noise generation source, is housed in the sound deadening block, it is difficult for the vibration to propagate to the outside, and the vibration and the noise are maintained at a low level.

When the suction force adjusting means is operated to change the ventilation area, the exhaust area of the blower is changed and the suction force of the ironing board is changed.

〔Example〕

An embodiment of a muffler for an ironing board according to the present invention will be described below with reference to FIGS.

FIG. 1 is a partially cutaway front view of a sewing machine provided with a silencer A of the present invention.

Reference numeral 1 denotes a sewing machine mounted on a table 3 which is erected on the upper surfaces of the upper frames 2 and 2, and a sewing machine drive motor 4 fixedly mounted on the lower surface of the table 3 and a control box 5 fixedly mounted under the table.
It is controlled and driven by a central control unit built in the. The upper legs 8 and 8 standing on the upper frames 2 and 2 are inserted into the pipe-shaped lower legs 7 and 7 standing on the lower frames 6 and 6 from their upper ends, and the table 3 is horizontally installed. The upper leg 8 can be fixed to the lower legs 7, 7 at a desired insertion position by a height adjusting means (not shown).
The height of can be adjusted.

Reference numeral 9 is a vacuum type ironing board device composed of a plurality of ironing boards 10 and 11 and a suction device 12, and is attached to the upper arm 8 of the left side and fixed to the bracket 14 fixed by the bolts 13, 13 ... The horse arm 15 is fixed, and a pipe-shaped ironing board support shaft 16 is axially attached to the horse arm mount 15 in a vertical direction, and the pipe-shaped ironing board support shaft 16 has a ventilation path formed therein. The base ends of 17, 18 communicate with the inner cavity and are pivotally mounted so as to be horizontally rotatable and cantilevered. The other end of the one horse arm 17 is connected to one end of an ironing board 10 called a “split horse” through a flange 19 so as to communicate therewith and horizontally pivotable. At the end, an ironing board 11 called "flat" through a flange 20
The central portion of the
Lumens of ironing boards 10 and 11 and pipe-shaped ironing board support shaft 16
The pipe-shaped ironing board support shaft 16 has a structure in which the communication direction is selectively switched by a switching damper 21 incorporated in the pipe-shaped ironing board support shaft 16. Both ironing boards 10 and 11 have a structure in which a porous sponge pad and a felt pad are laminated on the upper surface of a porous punching board, and the upper surface side is covered with a breathable skin material such as a cloth sheet to form the inner cavity. I am configuring.

Further, the suction device 12 is built in the muffler A,
A sound deadening block 27 formed by a foaming synthetic resin such as a low-foaming urethane resin, a foaming polystyrene resin, or a foaming polyethylene resin on a bottom plate 26 which is located between the lower legs 7 and 7 and stretched between the lower frames 6 and 6. It is fixed. A blower 22 having an intake port 23 in the axial direction and an exhaust port 24 in the circumferential direction is housed in the left half portion of the muffling block 27, and an impeller fan 22a of the blower 22 is driven to rotate by a blower motor 25. The inlet port 23 of the blower 22 and the lower end of the pipe-shaped ironing board support shaft 16 are connected to each other by a bellows tube 28 which can expand and contract.

The lower side of the left half of the silencing block 27 has a blower motor 25
A sewing machine bed holding space 29 for housing a drive operation pedal 35 of the sewing machine, and a U-shaped or U-shaped bent sound deadening air passage 33 having a right half as a sound deadening part 32. To form the sewing machine pedal accommodation space 29.
The air is exhausted from the atmosphere opening port 34 opened in the. Further, the partition plate 36 forming the muffling ventilation passage 33 is inclined so that the end edge 36a of the portion corresponding to the outside of the blower 22 in the plan shape is short, and the allowable ventilation amount with the opposing wall 27a. Is larger than the outside.

Further, reference numeral 30 is suction force adjusting means 30 which is formed in a communication portion between the exhaust port 24 of the blower 22 and the muffling ventilation passage 33, and the air volume adjusting slit plate 31 which forms a vertical lattice slit is also a vertical lattice slit. Is fixed to the fixed slit plate 37 configured so as to be slidable in the lateral direction (arrow B), and the adjusting knob 38 projecting from the air volume adjusting slit plate 31 is displaced along the long hole 39 to reduce the slit width. Change the amount of ventilation to control it.

Reference numeral 40 is a suction device section electrical equipment housing box housed in the muffling block 27.

The ironing board silencer with the above configuration is a blower motor.
While driving 25, it selectively communicates with the ironing boards 10 and 11 to be used by the switching damper 21, and the air volume adjusting slit plate 3
It is used by displacing 1 to increase or decrease the ventilation amount of the suction force adjusting means 30.

Further, the air on the surface of the ironing board 10 (or 11) passes through the inner cavity of the ironing board, the flange 19 (or 20), the horse arm 17 (or 18), the pipe-shaped ironing board support shaft 16 and the bellows tube 28 and the intake port 23.
Is sucked into the blower 22 from the exhaust port 24, through the air volume adjusting slit plate 31 and the noise canceling ventilation passage 33 which are formed in the muffling section 32 from the exhaust port 24, and is exhausted from the atmosphere opening port 34 to the sewing machine bed holding space 29.

When the opening area is changed by operating the air volume adjusting slit plate 31 of the suction force adjusting means 30, the exhaust area of the blower 22 changes,
The suction force of the ironing board 10 (or 11) can be adjusted, and the flow density in the cross-sectional direction is made uniform by the slanted edge 36a of the partition plate 36 formed in the muffler ventilation passage 33, and the air is released to the atmosphere. The air is exhausted from the mouth 34 toward the sewing machine bed holding space 29 and diffuses along the floor surface (see arrow).
Exhaust flow.

At this time, the intake / exhaust sound generated by the blower 22 is generated by the muffling section 32 formed of a foaming synthetic resin such as a low-foam urethane resin, a polystyrene foam resin, or a polyethylene foam resin.
When passing through the muffling ventilation passage 33, the noise is reduced by the muffling effect of the muffling ventilation passage 33, and the suction device is a noise source.
Since 12 is housed in the sound deadening block 27, the sound deadening block 27 absorbs vibrations but becomes difficult to propagate to the outside, and vibrations and noises can be maintained at a low level.

[Effect of device]

As described above, the sound deadening device for an ironing board according to the present invention has a sound deadening part formed of foaming synthetic resin, and
Since the exhaust passage that is continuous from the exhaust port of the blower is connected to the muffling ventilation passage, when the exhaust noise passes through the muffling ventilation passage, it is reduced by the muffling effect of the muffling ventilation passage. The practical effect of is extremely large.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a suction device built-in type sewing machine equipped with a silencer according to the present invention, FIG. 2 is a front sectional view showing an embodiment of the silencer part, and FIG. FIG. 4 is a plan view, FIG. 4 is a rear view of the muffling device section, and FIG. 5 is a front view showing a conventional suction device built-in type sewing machine. 1 …… Sewing machine 3 …… Table 6 …… Lower frame, 7 …… Lower leg 9 …… Vacuum type ironing board device 10,11 …… Ironing board, 12 …… Suction device 16 …… Pipe-shaped ironing board support shaft 26 …… Bottom plate , 27 ...... silencer block 22 ...... blower, 28 ...... bellows tube 25 ...... blower motor, 35 ...... drive operation pedal 29 ...... sewing machine bed accommodating space 32 ...... silencer, 34 ...... atmosphere opening 36 ...... partition Plate, 33 …… Silence ventilation passage 30 …… Suction force adjusting means, 37 …… Fixed slit plate 31 …… Air volume adjusting slit plate, A …… Silencer

Claims (2)

[Scope of utility model registration request] 1. An ironing board formed by forming a ventilation passage such as a split horse or a flat board and communicating with an inner cavity and having a breathable skin material, and a suction device communicating with a suction device through a bellows tube, and the surface of the ironing board. In a vacuum type ironing board provided with a blower and a blower motor that draw in air from a blower, a sound-ventilating passage that is bent in a U shape or a U shape so as to be continuous from the exhaust opening of the blower and has an air vent opening downward is formed by foaming synthesis. A silencer for an ironing board, which is provided with a silencer made of resin. 2. An exhaust port of the blower is provided with suction force adjusting means capable of adjusting a ventilation amount, and the back pressure of the blower is controlled to adjust the suction force of the ironing board. The silencer for an ironing board according to claim 1.