JP5557134B2 - Sewing machine with dust absorber - Google Patents

Description

  The present invention provides, for example, a feed dog that transports a lace ground and a thin fabric in a stacked state in a sewing progress direction, such as women's and women's underwear, and an end portion of the fabric that is transported in the sewing progress direction by the feed tooth. Dust, such as cut end chips and yarn waste generated during sewing by a straight stitch or staggered sewing machine with a fabric cutting device that cuts at a location before the needle entry part, is collected using air. The present invention relates to a sewing machine with a dust suction device.

  At the time of sewing with the sewing machine having the above-described configuration, a large amount of dust such as fabric edge chips and yarn scraps separated by the fabric cutting device is generated around the needle plate. Most of the generated dust penetrates into the sewing machine bed below the needle plate through the needle drop hole of the needle plate, etc. It gradually deposits on the fixing site. And if the accumulated amount of dust exceeds a certain level during continuous sewing over a long period of time, it will cause movement problems and functional deterioration of movable parts such as feed dogs and hooks, resulting in poor sewing, deformation of movable parts, It is easy to cause a failure that leads to damage. In addition, a part of the dust remaining on the needle plate is scattered around the sewing site and floats in the air, which causes a problem in that the working environment is undesirably deteriorated in terms of hygiene and health for the sewing manufacturer.

Conventionally, as means for suppressing the occurrence of a sewing failure or failure due to the influence of dust generated during sewing and the deterioration of the work environment, conventionally, for example, a dust suction structure having a structure as disclosed in Patent Document 1 and Patent Document 2 ( Sewing machines equipped with a (dust removal) device have been proposed.
The conventional dust collection (dust removal) device disclosed in Patent Document 1 is provided with an intake pipe having a suction port capable of sucking dust generated at the lower part of the needle plate at the upper part inside the sewing machine bed. Dust that is not sucked into the suction port of the intake pipe and falls and scatters downward inside the sewing bed is blown up by an upward flow of air blown toward the suction port and guided to the suction port A forced air introduction path having a simple air outlet is provided.

  Further, the conventional dust removing device disclosed in Patent Document 2 ejects air in the vicinity of one side portion between the feed dog driving mechanism and the hook inside the sewing machine bed in accordance with the up and down reciprocation of the needle. An air jet / suction pipe that can be switched between a state where dust is blown off and a state where dust inside the sewing machine bed is sucked is provided.

  Japanese Patent No. 4081706   Japanese Utility Model Publication No. 34-7621

In the conventional dust collection (dust removal) device disclosed in the above-mentioned Patent Document 1, the suction action near the lower portion of the throat plate where a large amount of dust is generated and the dust flow caused by the upward flow of air ejected from a lower position than that. By synergy with the blowing action, it is possible to exert a dust removing function of sucking and removing most of the dust generated inside the sewing machine bed.
Further, in the conventional dust removing device disclosed in Patent Document 2, the dust that is held in the sewing fabric and the thread and is peeled off by sliding contact (rubbing) with the needle and the feed dog is blown out. By wiping and removing, the dust is prevented from entering the hook and feed dog drive mechanism parts, and when the feed dog and hook do not operate, the dust inside the sewing machine bed is sucked and discharged outside. It is possible to exert a dust removal function such as.

  However, in the conventional dust removing devices disclosed in Patent Document 1 and Patent Document 2 described above, it is effective for removing a small amount of dust generated at a specific time in a specific part inside the sewing machine bed from a specific part. However, since the end of the fabric is always cut during the sewing operation, a large amount of dust including fabric end chips generated over a wide range of the upper and lower portions of the needle plate (inside the machine bed) without interruption. Cannot fully remove this. Therefore, when sewing continuously for a long time, a lot of dust remains inside the sewing machine bed and adheres to various movable parts such as the feed dog drive mechanism and hook, or fixed parts such as bearings, and gradually accumulates. As described above, it is inevitable that failure of movement of movable parts such as feed dogs and hooks, poor sewing due to functional deterioration, and defective situations leading to deformation and breakage of the movable parts occur at an early stage. In addition, a large amount of fabric edge chips adhere to and accumulate on the upper surface of the needle plate, which is scattered in the air and floats, so that the working environment is extremely bad, which is undesirable in terms of hygiene and health for sewing manufacturers. There was a problem that the occurrence was inevitable.

  The present invention has been made in view of the above-described circumstances, and can sufficiently and efficiently remove a large amount of dust generated inside the sewing machine bed, including dough edge chips, and is movable even in the case of continuous work over a long period of time. Sewing machine with a dust suction device that can perform sewing smoothly and reliably without causing movement problems of parts, and allows the sewing operation to proceed hygienically and healthily in a work environment with less floating dust Is intended to provide.

  The sewing machine with a dust suction device devised to achieve the above object includes a feed dog that conveys the cloth placed on the upper surface of the needle plate in the sewing progress direction, and the feed dog in the sewing progress direction. In a sewing machine provided with a fabric cutting device that cuts the end of the conveyed fabric at a location before the needle drop portion, the needle plate upper portion has a suction port that opens downward near the fabric cutting device. A first intake pipe that sucks in dust including the cloth edge chips cut by the cloth cutting device and conveys the dust to the collecting unit, and sandwiches the feed dog inside the sewing machine bed below the needle plate An air outlet that is arranged on one side of the left and right sides on the terminal end side in the dough conveying direction by the feed dog and jets air from the terminal end side toward the starting end side in the dough conveying direction A first air jet pipe having An air outlet that is arranged on the start end side in the dough conveying direction by the feed dog and jets air toward the other side inside the sewing machine bed, intersecting with the air jetted from the first air jet pipe And a second air jet pipe having an air outlet of the second air jet pipe on the other side of the left and right sides sandwiching the feed dog inside the sewing machine bed. A second intake pipe that sucks dust including dough edge chips generated inside the sewing machine bed including air blown out from the second air discharge pipe and conveys it to the collection unit It is characterized by being provided.

  By comprising as mentioned above, the dust containing the chip | tip which generate | occur | produces in the needle | hook upper part among the cloth edge chips generated with the cutting | disconnection of a cloth edge part is sucked in the inlet of a 1st inlet pipe, and is a collection | recovery part While being conveyed, the dust such as the fabric end chips that have entered the sewing machine bed through the needle drop portion of the needle plate and the yarn waste generated inside the sewing bed is discharged from the air outlet of the first air ejection pipe. After being guided to the starting end side in the dough conveying direction by the air blown toward the starting end side in the dough conveying direction, various movable parts such as the feed dog drive mechanism and the shuttle are bypassed, and then crossed with the air. From the one side of the feed dog inside the sewing machine bed to the other side with the air jetted from the air outlet of the second air jet pipe bypassing various moving parts such as the feed dog drive mechanism and shuttle And the second air jet pipe on the other side It is guided to the suction port of the second intake pipe facing the air ejection port is transported to a recovery unit.

  Therefore, the dust including the cloth edge chips generated in a large amount at the time of sewing can be collected and removed sufficiently and efficiently in the upper portion of the needle plate and the inside of the sewing machine bed. In particular, various movable parts such as a feed dog driving mechanism and a shuttle are provided through the air ejected from the first air ejecting pipe and the second air ejecting pipe for the dust including the cloth edge chips entering the sewing machine bed. After flowing to the detouring state, the dust is sucked into the suction port of the second air intake pipe, and the dust is fed forward in a baton-touch manner and collected, so that various moving parts such as the feed dog drive mechanism and the shuttle Suppressing the occurrence of defective sewing due to movement failures and functional deterioration, and the occurrence of defective situations that lead to deformation and breakage of moving parts due to abnormal increase in the amount of accumulated dust. In addition to being able to perform smoothly, it is possible to improve the working environment by reducing the amount of floating dust in the periphery of the sewing location, and it is possible to perform continuous sewing work hygienically and healthily. .

In the sewing machine with the dust suction device, the jet power of the air ejected from the jet outlet of the second air jet pipe is set stronger than the jet power of the air jetted from the jet outlet of the first air jet pipe In addition, it is preferable that the suction force sucked from the suction port of the second intake pipe is set stronger than the jet power of the air ejected from the outlet of the second air ejection pipe ( Claim 2).
In this case, as described above, it is possible to further suppress the dust that is forwarded in the baton touch manner from adhering to and accumulating on various movable parts by deviating from the predetermined flow path, thereby further enhancing the dust removal effect.

Further, in the sewing machine with the dust suction device, the first intake pipe and the second intake pipe both have negative pressure action caused by jetting air from the vicinity of the suction port in the direction opposite to the suction port. It is preferable to be configured so as to suck in dust including dough edge chips.
In this case, even when the first and second intake pipes having a large-diameter suction port that can secure a wide dust suction range are used, a large-capacity vacuum pump corresponding to the size of the diameter is not used. In both cases, the suction force from each suction port can be sufficiently strengthened by the negative pressure action that occurs when air is ejected in the direction opposite to the suction port using a small-diameter air ejection pipe. Therefore, it is possible to ensure a predetermined dust absorption (dust removal) performance while reducing the cost in terms of equipment.

Further, in the sewing machine with a dust suction device, both the jet outlet of the first air jet pipe and the jet outlet of the second air jet pipe are such that the air jetted from them becomes a flat flow along a horizontal plane. On the other hand, the suction port of the second intake pipe is preferably formed in a circular opening shape having a larger diameter than the other intake pipe portion while being formed in a flat opening shape. ).
In this case, since the ejected air becomes a flat flow along the horizontal plane, it is possible to suppress the dust flowing on the flat flow air from being diffused inside the sewing machine bed and adhering to the movable parts. In addition, substantially the entire amount of dust flowing in the flat aggregate state can be reliably sucked into the suction port of the second intake pipe and efficiently recovered.

Furthermore, in the sewing machine with a dust suction device, a handy type intake pipe connected to a distal end portion of a flexible intake hose is detachably connected to a proximal end portion of the second intake pipe, By separating the handy type intake pipe from the base end of the second intake pipe and moving the flexible intake hose in a state where the separated intake pipe is gripped and the flexible intake hose is bent, It is preferable that the dust containing the dough edge chips adhering to the residue can be manually sucked and conveyed to the collection unit.
In this case, at the time when the sewing work is finished, the handy type intake pipe is separated, and arbitrarily moved in a state where the separated handy type intake pipe is gripped and the flexible intake hose is bent. As a result, it is possible to manually suck in and collect the dust including the cloth edge chips remaining on the inside of the sewing machine bed, and to reliably exhibit the same dust absorption (dust removal) performance as described above at the next sewing. .

It is a perspective view of the principal part of the sewing machine with a suction device which concerns on this invention. It is an expanded sectional view of the principal part which shows the sewing of the double-layered cloth by the cloth cutting device of a sewing machine same as the above, and the cloth edge part cutting state. It is a top view of the principal part which shows the structure of the dust suction apparatus inside a sewing machine bed in a sewing machine same as the above. It is a top view of the principal part of the state which tilted back the sewing machine main body in a sewing machine same as the above with respect to a sewing machine table. It is a top view of the principal part which shows the state which carries out the manual suction process of the dust adhering to the inside of a sewing machine bed or an oil receiving member using the handy type intake pipe in a sewing machine same as the above.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a main part of a sewing machine with a dust suction device according to the present invention, FIG. 2 is an enlarged cross-sectional view of the main part showing a sewing and cutting state of a two-ply cloth by a cloth cutting device, and FIG. It is a top view of the principal part which shows the structure of a dust suction device. 1 to 3, reference numeral 1 denotes a sewing bed, and a sewing table 2 (see FIGS. 3 to 5) that is flush with the upper surface of the sewing bed 1 is provided so as to surround the sewing bed 1.

  A needle plate 3 and a sliding plate 4 are attached to the sewing bed 1 with their upper surfaces substantially flush with the upper surface of the sewing bed 1. The needle plate 3 has two rows of slot-like long holes 5a and 5b parallel to each other. One of the long holes 5b is divided into two stages, front and rear, with a needle drop portion 10 for performing predetermined sewing by dropping the needle 9 moving up and down. In one elongated hole 5a, two-layered fabric of a body fabric (lower fabric) 7 and an upper fabric 8 such as a lace fabric is sequentially transferred in the sewing progress direction X by a horizontal and vertical combined motion. And a pair of feed dogs 6b divided before and after sequentially transferring the two-ply fabric in the sewing progressing direction X are provided in the other long hole 5b. Since the feed driving mechanism for moving the feed dogs 6a and 6b in the horizontal direction and the vertical direction is well known, its details are omitted.

  A slit groove 11 for attaching a lower knife is formed in the lateral side portion of the front and rear slot-like long holes 5b in the needle plate 3 along the cloth feeding direction X, and the longitudinal direction of the slit groove 11 A substantially rectangular opening 12 for vertically swinging movement of the upper knife, which will be described later, is formed in the needle plate 3 portion at a portion corresponding to the needle drop portion 10 at a substantially central portion of the upper knife 12.

  As shown in FIG. 2, a lower knife 13 having a linear blade portion parallel to the cloth feeding direction (sewing progress direction) X is attached to and detached from the slit plate 11 on the needle plate 3. It is fixed to be exchangeable. On the other hand, the upper knife 15 having the straight blade part and the upper cloth guide piece 15a along the sewing progressing direction X can reciprocate up and down in the opening 12 similarly to the straight blade part of the lower knife 13. The lower knife 13 and the upper knife 15 are used to drop the end of the garment body (lower cloth) 7 of the double-layered cloth conveyed in the sewing progress direction X via the feed dogs 6a and 6b. A dough cutting device 14 for cutting at a location before the portion 10 is configured.

  As shown in FIG. 1, the needle plate 3 has a suction port 16 a that opens downward near the dough cutting device 14, and includes end chips of the body 7 cut by the dough cutting device 14. A first intake pipe 16 for sucking dust is fixed to the upper surface of the sewing machine bed 1 via a saddle-shaped metal fitting 18 and a mounting plate 19. The first intake pipe 17 is connected to a dust collecting part (not shown) via a flexible hose 20.

  As shown in FIG. 3, a rotary hook 21 having a role of forming a stitch by a coordinated movement with the needle 9 is provided inside the sewing machine bed 1 below the needle plate 3. An upper knife driving mechanism for reciprocally swinging the upper knife 15 in the dough cutting apparatus 14 up and down is provided on the lateral side. The upper knife driving mechanism is configured such that the needle moves through a knife table driving means comprising a movable knife table 22 with the upper knife 15 fixedly attached, an upper knife swinging arm 23, a square piece 24 and a bifurcated driven portion 25. The upper knife shaft 26 fixed to the lower surface of the plate 3 is rotatably supported by an upper knife shaft bracket 27 so as to be reciprocally movable up and down around the axis of the upper knife shaft 26. By rotating the upper knife 15 back and forth through the upper knife driving mechanism, the linear blade portion of the upper knife 15 is intermittently brought into contact with the linear blade portion of the lower knife 13, and the double-layer fabric just before sewing is obtained. The end of the lower fabric (body body) 7 is cut.

  Inside the sewing bed 1, one of the left and right sides sandwiching the feed dogs 6 a, 6 b and the shuttle 21 is arranged on the end side in the material conveyance direction by the feed dogs 6 a, 6 b, A first air ejection pipe 28 having an air ejection port 28a that ejects air in the direction of the arrow x from the terminal end side toward the start end side, and the start end side in the dough conveying direction by the feed dogs 6a and 6b. And an air jet outlet 29a that crosses the air jetted from the jet outlet 28a of the first air jet pipe 28 at a substantially right angle and jets air in the direction of the arrow y toward the other side of the sewing machine bed 1. A second air ejection pipe 29 is provided.

  Also, in the sewing machine bed 1, the other side of the left and right sides sandwiching the feed dogs 6 a and 6 b and the shuttle 21 is a suction port facing the jet port 29 a of the second air jet pipe 29. A second intake pipe 30 having 30a is provided. As shown in FIG. 4, the second intake pipe 30 is fixedly supported by an inclined plate portion 33 a that is disposed immediately below the sewing head 1 and that is continuous with an end portion of an oil receiving member 33 that contains lubricating oil. Yes.

  A base end portion (an end portion opposite to the suction port 30a) of the second intake pipe 30 is connected to a distal end portion of a flexible intake hose 31 disposed along the lower surface of the sewing machine table 2. Further, the front end suction port 32a of the hand-type intake pipe 32 having an L shape in plan view is connected so as to be separable from the insertion and extraction. As shown in FIG. 4, the handy-type intake pipe 32 is used by inserting the second intake pipe 30 into the base end of the second intake pipe 30 and connecting it to the second air jet as shown in FIG. The dust containing the dough edge chips blown off by the air ejected from the jet outlet 29a of the pipe 29 is guided in the direction of the arrow z and sucked into the second intake pipe 30, and the sucked dust is sucked into the handy type intake pipe. 32 and the flexible intake hose 31 can be conveyed to the dust collecting unit.

  Further, at the end of sewing, etc., the handy type intake pipe 32 is separated from the base end of the second intake pipe 30, and the separated intake pipe 32 is gripped by hand as shown in FIG. As a result, the tip suction port 32a is moved and operated while the flexible suction hose 31 is bent, so that it remains on the inside of the sewing machine bed 1 and the upper surface of the inclined plate portion 33a connected to the end of the oil receiving member 33. The adhering dust can be sucked manually and conveyed to the dust collecting part.

  Here, the jet power of the air jetted from the jet outlet 29a of the second air jet pipe 29 is set stronger than the jet power of the air jetted from the jet outlet 28a of the first air jet pipe 28. In addition, the suction force sucked from the suction port 30a of the second intake pipe 30 is set stronger than the jet power of the air jetted from the jet outlet 29a of the second air jet pipe 29. Yes.

  Further, in the vicinity of the suction port 16a of the first intake pipe 16 and the suction port 30a of the second intake pipe 30, a small diameter that ejects air in a direction opposite to the suction ports 16a and 30a. Air ejection hoses 17 and 34 are connected, and a collection unit that sucks in dust including dough edge chips by the negative pressure generated in the vicinity of the suction ports 16a and 30a when air is ejected from these air ejection hoses 17 and 34. It is comprised so that it may convey.

  Furthermore, both the jet outlet 28a of the first air jet pipe 28 and the jet outlet 29a of the second air jet pipe 29 have a flat opening shape so that the air jetted from them becomes a flat flow along a horizontal plane. On the other hand, the suction port 30a of the second intake pipe 30 is formed in a circular opening shape having a larger diameter than that of other portions.

  In FIG. 1, reference numeral 35 denotes a cloth presser. 4 and 5, reference numeral 36 denotes a manual feed port formed in the inclined plate portion 33a at the end of the oil receiving member 33. The manual feed port 36 accommodates a limited length of lower thread. This is an opening for inserting a hand from the lower part of the sewing machine table 2 when replacing the inner hook (bobbin case) with respect to the hook 21.

  Further, the sewing machine main body including the sewing bed 1 and the sewing machine arm 37 is configured to be tiltable rearward with respect to the sewing machine table 2 and the oil receiving member 33. By tilting the sewing machine main body rearward, FIGS. As shown in FIG. 5, the oil receiving member 33 can be opened.

  In the sewing machine with a dust suction device configured as described above, a double-layered fabric of a body fabric (lower fabric) 7 and an upper fabric 8 such as a lace fabric is set on the upper surface of the sewing machine bed 1, the needle plate 3 and the sliding plate 4. By rotating the sewing machine in this state, the two-ply fabric is sequentially transferred in the sewing progress direction X via the feed teeth 6a and 6b. At this time, as shown in FIG. 2, the upper fabric 8 of the two-layer fabric is guided by the fabric guide piece 15 a continuously provided on the upper knife 15 so as to bypass the cutting action position, and the body 7 Is divided up and down along the upper surface of the needle plate 3 and transferred to the cutting action position.

  The movable knife base 22 is fixed to the upper knife by means of a knife table driving means comprising an upper knife swinging arm 23, a square piece 24, and a bifurcated driven portion 25 that reciprocally swings in conjunction with the rotation of the sewing machine. The reciprocating swing is driven up and down around the axis of the shaft 26, and the straight blade portion of the upper knife 15 is intermittently brought into contact with the straight blade portion of the lower knife 13 by the reciprocating swing of the movable knife base 22. The end of the lower fabric (body body) 7 is cut out of the double-layer fabric just before sewing, and the needle 9 falls into the needle drop portion 10 immediately after the cutting, and the ends of the double-layer fabric are sewn together, and the sewing is performed. The portions are sequentially transferred in the sewing progress direction X, and the sewing progresses one after another.

  At the time of such sewing, among the fabric end chips generated when the end portion of the lower fabric (body body) 7 is cut by the fabric cutting device 14, the dust including the chips generated on the upper portion of the needle plate 3 is Then, the air is sucked into the suction port 16a of the first intake pipe 16 where the suction force is generated by the negative pressure action, and is transported to the recovery unit through the flexible hose 20.

  On the other hand, the dust such as the fabric end chips that have entered the sewing machine bed 1 through the needle drop part 10 and the long holes 5a and 5b of the needle plate 3 and the yarn waste generated inside the sewing machine bed 1 The start side of the dough conveying direction in a state where various movable parts such as the feed dog driving mechanism and the shuttle 21 are detoured by the air jetted from the air outlet 28a of the air jet pipe 28 toward the starting end of the dough conveying direction. In the state where the air is blown from the air outlet 29a of the second air jet pipe 29 so as to cross the air, the movable parts such as the feed dog driving mechanism and the shuttle are bypassed. It flows from one side of the feed dogs 6a and 6b toward the other side through the position near the rear end inside the sewing machine bed 1, and faces the air outlet 29a of the second air ejection pipe 29 on the other side. In the suction port 30a of the second intake pipe 30 Sucked into the second intake pipe 30 by him, it is conveyed to the collecting unit through the intake pipe 32 and the flexible hose 31 of the handheld.

  As described above, dust containing a large amount of fabric edge chips generated during sewing is sucked into the first intake pipe 16 and the second intake pipe 30 in the upper portion of the needle plate 3 and the inside of the sewing machine bed 1 to quantitatively. It can be recovered and removed sufficiently and efficiently. In particular, dust including dough edge chips that enter the inside of the sewing machine bed 1 is supplied to the feed dog drive mechanism, the shuttle, and the like via the air ejected from the first air ejection pipe 28 and the second air ejection pipe 29. The feed dog drive mechanism and the shuttle can be obtained by causing the dust to flow forward in a baton-touch manner and collecting the dust, for example, after flowing various movable parts in a detouring state and then sucking into the suction port 30a of the second intake pipe 30. For example, it is possible to suppress the occurrence of defective sewing that is caused by a movement failure or functional deterioration of various moving parts such as 21 and a defective situation that leads to deformation or breakage of the moving parts due to an abnormal increase in the amount of accumulated dust. Can be performed reliably and smoothly even in continuous sewing work over a range of times, and the working environment can be improved by sucking and collecting the floating dust around the sewing part via the first intake pipe 16. Hygienic the sewing operation, it is possible to proceed healthy.

  Further, as in the above-described embodiment, it is ejected from the ejection port 29a of the second air ejection pipe 29 as compared with the ejection power of the air ejected from the ejection opening 28a of the first air ejection pipe 28. The suction force sucked from the suction port 30a of the second intake pipe 30 as compared with the jet power of the air that is set to a strong air output and is ejected from the outlet 29a of the second air ejection pipe 29 As described above, it is possible to further suppress the dust, which is forwarded in the baton touch manner, from adhering to and accumulating on various movable parts such as the shuttle 21 by deviating from the predetermined flow path. Improvements can be made.

  Further, as in the above embodiment, both the first intake pipe 16 and the second intake pipe 30 eject air from the vicinity of the intake ports 16a and 30a in the opposite direction to the intake ports 16a and 30a. The first and second suction ports 16a and 30a having a large diameter that can secure a wide dust suction range by constructing so as to suck in dust including dough edge chips by the negative pressure effect generated by the Even when the intake pipes 16 and 30 are used, it is not necessary to use a large-capacity vacuum pump corresponding to the diameter of the intake pipes 16 and 30, and the small-diameter air ejection pipes 17 and 34 are used to face the direction opposite to the intake port. It is possible to sufficiently increase the suction force from the suction ports 16a and 30a by the negative pressure effect caused by ejecting the air, and therefore, it is possible to reduce the cost in terms of equipment. , It is possible to secure a predetermined dust suction (dust removal) performance.

Further, as in the above-described embodiment, both the jet outlet 28a of the first air jet pipe 28 and the jet outlet 29a of the second air jet pipe 29 are flattened along the horizontal plane. On the other hand, by forming the suction port 30a of the second intake pipe 30 to be larger in diameter than the other intake pipe portions and forming a large-diameter circular opening shape. Since the air ejected from the first and second air ejection pipes 28 and 29 becomes a flat flow along the horizontal plane, the dust flowing on the flat flow air diffuses inside the sewing machine bed 1. In addition, it is possible to prevent the dust from adhering to moving parts and the like, and to efficiently collect almost the entire amount of dust flowing in a flat aggregate state without leaving it in the suction port 30a of the second intake pipe 30. be able to.

  Further, as described in the above embodiment, when the sewing work is completed, the handy type intake pipe 32 that is detachably connected to the base end portion of the second intake pipe 30 is connected to the second intake pipe 32. For example, the inside of the sewing machine bed 1 can be separated by moving the tip suction port 32a while holding the separated intake pipe 30 by hand and bending the flexible intake hose 31. The dust adhering to the surface of the machine is manually sucked in and transported to the recovery unit for recovery processing, or as shown in FIG. 5, the sewing machine body is tilted rearward with respect to the sewing machine table 2 and the oil receiving member 33 to receive the oil. By moving in the same manner with the member 33 opened, the dust adhering to the upper surface of the inclined plate portion 33a at the end of the oil receiving member 33 is manually sucked and transported to the recovery unit for recovery processing. Risu It is possible.

  In the above embodiment, the jet outlet 28a of the first air jet pipe 28 and the jet outlet 29a of the second intake pipe 29 are shown as flat openings along the horizontal plane. The plurality of air ejection pipes may be closely arranged along a horizontal plane.

  As the dough cutting apparatus 14 used in the present invention, any structure other than the structure described in the above embodiment may be used.

1 Sewing machine bed 3 Needle plate 6a, 6b Feed dog 7 Lower fabric (body body)
8 Upper fabric 9 Needle 14 Fabric cutting device 16 First intake pipe 16a First intake pipe suction port 28 First air ejection pipe 28a First air ejection pipe air ejection outlet 29 Second air ejection pipe 29a Air outlet 30 of second air outlet 30 Second intake pipe 30a Suction port 31 of second intake pipe 31 Flexible intake hose 32 Handy type intake pipe 32a Suction port of handy type intake pipe X Sewing progress direction (Fabric feed direction)

Claims (5)

A feed dog that transports the fabric placed on the upper surface of the needle plate in the sewing progress direction, and a fabric cutting device that cuts the end of the fabric transported in the sewing progress direction by this feed tooth at a location before the needle drop portion; In a sewing machine equipped with
The upper portion of the throat plate has a suction port that opens downward near the fabric cutting device, and sucks dust containing fabric edge chips cut by the fabric cutting device and conveys the dust to the collection unit. A pipe is provided,
Inside the sewing bed below the needle plate, one of the left and right sides sandwiching the feed dog is arranged on the end side in the direction of carrying the dough with the feed dog, and the dough is conveyed from the end side. A first air ejection pipe having an air ejection outlet for ejecting air toward the start end side in the direction, and an ejection from the first air ejection pipe disposed on the start end side in the material conveyance direction by the feed dog And a second air ejection pipe having an air ejection port for ejecting air toward the other side inside the sewing machine bed, intersecting with the air to be performed, and
Inside the sewing machine bed, the other side of the left and right sides sandwiching the feed dog has a suction port facing the air jet port of the second air jet tube, and from the second air jet tube A sewing machine equipped with a dust suction device, characterized in that a second intake pipe is provided for sucking and transporting dust, including air blown out, generated inside the sewing machine bed to the collection unit.   Compared to the jet power of the air jetted from the jet outlet of the first air jet pipe, the jet power of the air jetted from the jet outlet of the second air jet pipe is set strongly, and the second The sewing machine equipped with a dust suction device according to claim 1, wherein the suction force sucked from the suction port of the second intake pipe is set stronger than the jet power of the air jetted from the jet outlet of the air jet pipe.   Both the first intake pipe and the second intake pipe suck in dust including dough edge chips due to negative pressure generated when air is blown from the vicinity of the suction port in the direction opposite to the suction port. The sewing machine with a dust suction device according to claim 1 or 2, configured as described above. Both the jet outlet of the first air jet pipe and the jet outlet of the second air jet pipe are formed in a flat opening shape so that the air jetted from them becomes a flat flow along a horizontal plane. 4. The sewing machine-attached sewing machine according to claim 1, wherein the suction port of the second intake pipe is formed in a circular opening shape having a larger diameter than that of the other intake pipe portion .   A handy type intake pipe connected to a distal end portion of a flexible intake hose is detachably connected to a proximal end portion of the second intake pipe, and a proximal end portion of the second intake pipe is connected. The handheld type intake pipe is separated from the machine, and the gripping of the separated intake pipe to move the flexible intake hose in a bent state makes it possible to remove the fabric edge chips remaining inside the sewing machine bed. The sewing machine with a dust suction device according to any one of claims 1 to 4, wherein the dust contained therein can be manually sucked and conveyed to the collection unit.

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