JP2015173771A - feeder of sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeder of a sewing machine which blocks dust from entering the inside of a sewing machine frame.SOLUTION: A feeder of a sewing machine includes: a pair of feed bars 1 and 2 which are arranged side by side in the left and right and oscillate in a front and rear direction and in a vertical direction; a dustproof seal body 6 which is made of a metal plate and is provided with an insertion hole 6a for inserting the feed bars 1 and 2 therethrough; and a dustproof seal body guide 7 for guiding the vertical motion of the dustproof seal body 6. In the dustproof seal body guide 7, there are arranged an insertion window 7a for inserting the feed bars 1 and 2 therethrough and two front and rear guide surfaces 8a and 8b which are arranged perpendicularly to the front and rear direction at an interval equal to the thickness of the dustproof seal body 6 and guide the vertical motion of the dustproof seal body 6.

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine feeding device that feeds fabric by a feed dog that performs vertical movement in a chain stitch sewing machine or the like, and more specifically, to prevent leakage of lubricating oil from a feed base to which the feed dog is attached. The present invention relates to a sewing machine feeding device provided with a sealing mechanism. The front and rear in the present invention refers to the front and rear in the dough feeding direction, and the upper, lower, left and right refer to the upper, lower, left and right when the sewing machine is viewed from the front.

  2. Description of the Related Art Conventionally, as this type of sewing machine feeding apparatus, for example, an apparatus that prevents leakage of lubricating oil inside a sewing machine frame by an elastic seal body inserted through a feeding base is known (see Patent Document 1). .) A feed base that partially protrudes from the window on the front of the sewing machine frame, a feed guide that guides the movement of the feed base, a partition plate that is provided on the window, and a feed plate that can be moved up and down behind the partition plate. A first elastic seal body through which the base is inserted. And the 1st elastic seal body is guided by a feed stand guide and a partition board, and the vertical motion is controlled while being controlled. Further, at least one second elastic seal body is disposed on the opposite side of the first elastic seal body with the partition plate interposed therebetween so as to be movable up and down, and the feed base is inserted into the second elastic seal body. The An elastic seal body guide is disposed on the front side of the second elastic seal body, and the second elastic seal body is regulated in the vertical direction and guided in the vertical movement by the partition plate and the elastic seal body guide. Both elastic seal bodies consist of plate-like elastic bodies, and both elastic seal bodies are formed with through holes (insertion holes) through which the feed base is inserted. The through hole (insertion hole) elastically presses the outer periphery of the feed base.

  According to the conventional sewing machine feed apparatus having the above-described configuration, when the feed base performs an elliptical motion up and down and back and forth along the cloth feed direction when the sewing machine is driven, both elastic sealing bodies follow the feed base. While moving up and down, remove the lubricating oil adhering to the outer periphery of the feed base, and remove the lubricating oil adhering to the outer periphery of the feed base from the through hole (insertion hole) of the outermost elastic seal guide In other words, it can be prevented from being taken out of the sewing machine frame.

JP 2004-236945 A (pages 3 to 4, FIGS. 1 to 4)

  However, in the above-described conventional sewing machine feeder, the second elastic seal body is always exposed through the through hole (insertion hole) of the elastic seal body guide, and the dust that has entered from the through hole (insertion hole) is first. There was a possibility that the 2nd elastic seal body might be damaged by adhering to 2 elastic seal bodies. Moreover, since both elastic seal bodies are elastic bodies, they move up and down while being slightly deformed in the front-rear direction as the feed base moves back and forth. Therefore, in order to smoothly move the elastic seal body up and down, a slight gap is provided between the elastic seal body and the guide surfaces arranged before and after the elastic seal body. However, there is a possibility that dust entering from the above-described through hole (insertion hole) may enter the first elastic seal body and further to the rear through this gap, damaging the first elastic seal body and the internal parts of the sewing machine. Further, the pump action is generated by the above-described deformation of the elastic seal body in the front-rear direction, and the lubricating oil in the sewing machine frame may leak outward from the insertion hole (through hole) of the elastic seal body guide through the gap. .

  The present invention has been made in view of the above circumstances, and always blocks dust that enters the inside of the sewing machine frame and the guide part of the elastic seal body, and the deformation of the elastic seal body causes a pumping action so that the lubricating oil is outside the sewing machine frame. It is an object of the present invention to provide a sewing machine feeding device that can prevent leakage.

  In order to achieve the above object, the present invention provides a pair of feed bases that are arranged side by side on the window portion on the front surface of the sewing machine frame and swing in the front-rear and vertical directions, and are attached to the front side of the sewing machine frame. An elastic seal body guide that is inserted and is provided with a window that allows the feed base to move up and down, and an insertion hole through which the feed base is inserted, are guided to the elastic seal body guide in conjunction with the feed base. In the sewing machine feed apparatus having an elastic seal body that moves up and down, an insertion hole that is made of a metal plate material and is arranged so as to cover the window in front of the elastic seal body guide and through which the feed base is inserted. A dust-proof seal body guide, and a dust-proof seal body guide that is disposed in front of the elastic seal body guide and guides the vertical movement of the dust-proof seal body. An insertion window through which the feed base is inserted, and a front and rear guide surface that is arranged at a distance perpendicular to the front-rear direction and equal to the thickness of the dust-proof seal body, and guides the vertical movement of the dust-proof seal body. It is characterized by that.

  The present invention provides a feed base guide that is attached to the front surface of a sewing machine frame and that guides the feed table forward and backward and up and down, and an insertion hole through which the feed base is inserted. It is desirable to provide an elastic seal body that is guided by the front surface of the table guide and the rear surface of the elastic seal body guide and that moves up and down in conjunction with the feed table.

  Further, the dustproof seal body guide is formed separately from the elastic seal body guide and has a rectangular hole that opens at one or both of the upper end and the lower end, and the two front and rear guide surfaces are the rectangular hole. It is good to be formed by the front surface and the rear surface.

  Further, the dustproof seal body guide is formed separately from the elastic seal body guide, and is disposed opposite to the rectangular recess provided on the front surface or the rear surface of the dustproof seal body guide, and the feed base is And a dustproof seal body cover that is inserted and provided with a window that allows the feed base to move up and down. The front and rear guide surfaces face the bottom surface of the rectangular recess and the bottom surface of the rectangular recess. You may form with the opposing surface of the said dust-proof seal body cover.

  Further, the dust-proof seal body guide is formed integrally with the elastic seal body guide, and is disposed opposite to the rectangular recess provided on the front surface of the dust-proof seal body guide and the rectangular recess, and the feed base is inserted therethrough. And a dustproof seal body cover provided with a window allowing the feed base to move up and down, and the two front and rear guide surfaces are a bottom surface of the rectangular recess and the dustproof seal facing the bottom surface of the rectangular recess. You may form with the opposing surface of a body cover.

  Further, the dustproof seal body guide is formed integrally with the elastic seal body guide, and includes a rectangular hole having an upper end, a lower end, or both upper and lower ends open, and the two front and rear guide surfaces are formed by the rectangular hole. It may be formed on the front surface and the rear surface.

  According to the present invention, the dust-proof seal body is disposed in front of the elastic seal body, and the interval between the guide surfaces for guiding the dust-proof seal body is formed to be equal to the thickness of the dust-proof seal body. Dust entering the inside can be reliably blocked. As a result, seizure of parts inside the sewing machine frame and breakage of the elastic seal body can be prevented. In addition, by arranging a metal dust-proof seal body, pumping action due to deformation of the insertion hole of the feed base does not occur, and lubricating oil is prevented from being sucked out from the inside of the sewing machine frame and leaked to the outside of the sewing machine frame. Can do. In addition, when the dustproof seal body guide is formed separately from the elastic seal body guide, or when the dustproof seal body front is guided using the dustproof seal body cover, there is an advantage that the dustproof seal body can be easily replaced. . On the other hand, when the dust-proof seal body guide and the elastic seal body guide are formed integrally, there is an advantage that the number of parts is reduced, thereby increasing the work efficiency during assembly.

It is a perspective view of the feeder of the sewing machine concerning the present invention. It is a disassembled perspective view of the feeder of the sewing machine. It is the cross-sectional top view explaining the principal part of the feeder of the sewing machine. It is the vertical side view explaining the principal part of the feeder of the sewing machine. It is a disassembled perspective view which shows the principal part of another Example in the feeder of the said sewing machine. It is a disassembled perspective view which shows the principal part of another Example in the feeder of the said sewing machine. It is a disassembled perspective view which shows the principal part of another Example in the feeder of the said sewing machine.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the sewing machine feeding apparatus according to the present invention includes a pair of left and right feed bases 1, 2, an elastic seal body guide 3, two first elastic seal bodies 4, and a second one. An elastic seal body 5, a dustproof seal body 6, a dustproof seal body guide 7, a dustproof seal body cover 18, and two front and rear guide surfaces 8a and 8b are provided.

  Feeding teeth (not shown) for feeding the dough are arranged and fixed at the tip portions of the pair of left and right feeding bases 1 and 2. The midway bifurcated portions 1a and 2a of the feed bases 1 and 2 are supported by a square piece 9 inserted into an eccentric portion of a main shaft (not shown), and the rear bifurcated portions 1b and 2b of the feed bases 1 and 2 are eccentric pins 10. Is supported by a square piece 11 inserted into the eccentric portion 10a. The left and right sides of the rear fork part 1b, 2b of the feed base are guided by the washer 12 inserted and fixed in the eccentric portion 10a of the eccentric pin 10 and the left end surface 14a of the bush 14 inserted and fixed in the sewing machine frame 13 in the longitudinal direction. The eccentric pin 10 is fixed to the bush 14 with a screw 19. A known link member (not shown) that moves back and forth in conjunction with the rotation of the main shaft is connected to the feed bases 1 and 2.

  When the main shaft rotates, the feed bases 1 and 2 move up and down together with the square piece 9. Accordingly, the feed tables 1 and 2 swing up and down and back and forth by the combination of the known back and forth movement of the link member and the up and down movement of the square piece 9, and the cloth placed on the sewing portion of the sewing machine frame 13 is driven by the feed dog. Thus, the cloth moves in the material feed direction F. In the sewing machine frame 13, a known oil supply device that supplies lubricating oil when the main shaft rotates is disposed.

  As shown in FIGS. 1 to 4, a feed base guide 15 is fixed to the window 13 a on the front surface of the sewing machine frame 13 with screws 16. The feed tables 1 and 2 are inserted between a pair of left and right guide surfaces 15b and 15b formed on the top of the feed table guide 15. The guide surfaces 15b and 15b support the left and right sides of the feed tables 1 and 2, respectively. The elastic seal body guide 3 is disposed in front of the feed base guide 15. The elastic seal body guide 3 is provided with a rectangular insertion window 3a through which the feed bases 1 and 2 are inserted and which allows the feed bases 1 and 2 to move up and down. Further, the elastic seal body guide 3 is provided with a rectangular hole 3b having a rectangular cross section extending in the vertical direction and having an opening at the bottom, and the first elastic seal body 4 is inserted into the rectangular hole 3b. The first elastic seal body 4 has an insertion hole 4a through which the feed bases 1 and 2 are inserted, and the elastic seal body guide 3 guides the vertical movement as the feed bases 1 and 2 move up and down. The member which comprises the 1st elastic seal body 4 consists of a rectangular-shaped board | plate material which has elasticity, and there exists a polyurethane as an example of the elastic material used. A dust-proof seal body guide 7 for guiding the vertical movement of the dust-proof seal body 6 is provided on the front side of the elastic seal body guide 3. The dust-proof seal body guide 7 is mainly constituted by a part of the front side of the elastic seal body guide 3 and a dust-proof seal body cover 18. A rectangular recess 7c is formed on the front surface of the elastic seal body guide 3, and a smooth guide surface 8a is formed on the bottom surface thereof as shown in FIG. An insertion window 7 a through which the feed bases 1 and 2 are inserted is formed at the center of the guide surface 8 a, and this insertion window 7 a is common with the insertion window 3 a of the elastic seal body guide 3. The dust-proof seal body cover 18 is formed with an insertion hole 18a through which the feed bases 1 and 2 are inserted, and a guide surface 8b is provided on the back surface. Both the elastic seal body guide 3 and the dustproof seal body cover 18 are fixed to the feed base guide 15 with screws 17. In the rectangular recess 7c on the front surface of the elastic seal body guide 3, a dustproof seal body 6 is disposed so as to be movable up and down. The dust-proof seal body 6 is sandwiched between guide surfaces 8a and 8b that are opposed to each other in the front-rear direction. The dust-proof seal body 6 is provided with an insertion hole 6a through which the feed bases 1 and 2 are inserted. , 2 moves up and down while being guided by the two front and rear guide surfaces 8a and 8b while being restricted in back and forth movement. The dustproof seal body 6 is made of a metal rectangular plate, and stainless steel is an example of the metal material used. Both guide surfaces 8a and 8b are arranged perpendicularly and spaced apart in the front-rear direction of the sewing machine, and the front-rear distance is made equal to the thickness of the dustproof seal body 6.

  2 to 4, a guide groove 15a is provided on the front surface of the feed guide 15, and the second elastic seal body 5 is inserted into the guide groove 15a. The The second elastic seal body 5 has an insertion hole 5a through which the feed bases 1 and 2 are inserted. The second elastic seal body 5 is guided by the guide groove 15a of the feed base guide 15 and the rear surface of the elastic seal body guide 3 and moves back and forth. Movement is regulated. Similar to the first elastic seal body 4, the second elastic seal body 5 is composed of a rectangular plate material having elasticity.

  Next, the operation of the sewing machine feeder configured as described above will be described with reference to FIGS. When the feed bases 1 and 2 swing back and forth in accordance with the rotation of the main shaft (not shown) of the sewing machine, dust adhering to the exposed portions of the feed bases 1 and 2 outside the sewing machine frame 13 is caused by the dust-proof seal body 6. It is scraped off. At this time, the dust outside the sewing machine frame 13 tries to enter the inside of the sewing machine frame 13 through the insertion window 7a of the dustproof seal body guide 7. However, the dustproof seal body 6 has a gap between the guide surfaces 8a and 8b of the dustproof seal body guide 7. Therefore, the insertion window 7 a is completely shielded, and dust cannot enter the sewing machine frame 13. As a result, seizure of parts inside the sewing machine frame 13 and breakage of the elastic seal body due to intrusion of dust can be prevented. Since the dust-proof seal body 6 is made of metal and does not deform as the feed bases 1 and 2 move back and forth, the distance between the front and rear guide surfaces 8a and 8b of the dust-proof seal body guide 7 is set to the thickness of the dust-proof seal body 6 as described above. Even if they are arranged to be equal, the dust-proof seal body 6 is smoothly guided in vertical movement by the guide surfaces 8a and 8b. Further, since the metal seal body is not deformed by the swinging of the feed bases 1 and 2, the dust-proof seal body 6 does not generate a pump action, and the lubricating oil is sucked out from the inside of the sewing machine frame 13 to the outside of the sewing machine frame 13. Leakage is prevented. In the above embodiment, the elastic seal body guide 3 described above has the rectangular recess 7c that opens only on the front surface. However, the rectangular recess 7c has a shape in which one or both of the upper end and the lower end are open. May be.

  Further, when the second elastic seal body 5 is provided as in the above embodiment, the lubricating oil in the sewing machine frame 13 is moved by the second elastic seal body 5 before reaching the first elastic seal body 4. Most of the oil is scraped off and the lubricating oil scattered on the first elastic seal body 4 is reduced, so that the lubricating oil is further prevented from leaking to the outside of the sewing machine frame 13.

  In the above embodiment, a part of the dustproof seal body guide 7 described above is formed separately from the elastic seal body guide 3, but instead, the dustproof seal body guide 7 and the elastic seal body guide 3 are integrally formed. May be. In this case, as shown in FIG. 5, the dust-proof seal body guide 7 is integrally formed with the elastic seal body guide 3 before the elastic seal body guide 3. The dustproof seal body guide 7 is provided with a rectangular hole 7b extending in the vertical direction and having an opening at the bottom, and the dustproof seal body 6 is inserted into the rectangular hole 7b so as to be movable up and down. Two smooth guide surfaces 8c and 8d for guiding the vertical movement of the dust-proof seal body 6 are formed on the front and rear surfaces of the rectangular hole 7b. Both guide surfaces 8c and 8d are arranged perpendicularly and spaced apart in the longitudinal direction of the sewing machine, and the distance between the front and rear is made equal to the thickness of the dustproof seal body 6, and the dustproof seal body 6 is guided by both guide surfaces 8c and 8d. It moves up and down while restricting back and forth movement. An insertion window 7d through which the feed tables 1 and 2 are inserted is formed at the center of both guide surfaces 8c and 8d. The integrally formed dustproof seal guide 7 and elastic seal guide 3 are fixed to the feed guide 15 with screws 17. According to this configuration, the number of parts is reduced, and the working efficiency during assembly is increased. The dust-proof seal body guide 7 shown in FIG. 5 has a rectangular hole 7b that opens only at the lower end. Alternatively, the rectangular hole 7b may have a shape that opens only at the upper end or both upper and lower ends. Good.

  Moreover, the dustproof seal body guide 7 and the elastic seal body guide 3 may be formed separately. In this case, as shown in FIG. 6, the dustproof seal body guide 7 is disposed and fixed in front of the elastic seal body guide 3, and the dustproof seal body guide 7 is formed with a rectangular hole 7b as in FIG. The guide 7 is fixed to the feed guide 15 together with the elastic seal body guide 3 with screws 17. According to this configuration, the dustproof seal body 6 can be easily replaced.

  Furthermore, the dust-proof seal body guide 7 can be configured to be separated into a dust-proof seal body guide body 20 and a dust-proof seal body cover 18. In this case, as shown in FIG. 7, the dust-proof seal body guide body 20 including the insertion window 20 a through which the feed bases 1 and 2 are inserted is disposed and fixed in front of the elastic seal body guide 3. A rectangular recess 7c is formed on the front surface of the dust-proof seal body guide body 20 as in FIG. 2, and the dust-proof seal body 6 is inserted into the rectangular recess 7c so as to be movable up and down. A dust-proof seal body cover 18 is arranged in front of the dust-proof seal body guide body 20 so as to face the rectangular recess 7 c, and the dust-proof seal body guide body 20 and the dust-proof seal body constituting the dust-proof seal body guide 7 are arranged. The cover 18 is fixed to the feed guide 15 together with the elastic seal body guide 3 with screws 17. According to this configuration, the dustproof seal body 6 can be easily replaced.

DESCRIPTION OF SYMBOLS 3 Elastic seal body guide 3a Insertion window 3b Rectangular hole 6 Dust-proof seal body 6a Insertion hole 7 Dust-proof seal body guide 7a Insertion window 7b Rectangular hole 7c Rectangular depression 7d Insertion window 8a Guide surface 8b Guide surface 8c Guide surface 8d Guide surface 18 Dust-proof seal body cover 18a Insertion hole 20 Dust-proof seal body guide body 20a Insertion window

Claims (6)

A pair of feed bases arranged side by side on the front window of the sewing machine frame and swinging back and forth and up and down, and mounted in front of the sewing machine frame, the feed base is inserted and the vertical movement of the feed base is allowed Of a sewing machine having an elastic seal body guide provided with a window to be moved and an insertion hole through which the feed base is inserted, and having an elastic seal body which is guided by the elastic seal body guide and moves up and down in conjunction with the feed base. In the feeder, a dust-proof seal body made of a metal plate material, disposed so as to cover the window in front of the elastic seal body guide, and provided with an insertion hole through which the feed base is inserted, and the elastic seal body A dust-proof seal body guide disposed in front of the guide for guiding the vertical movement of the dust-proof seal body, the dust-proof seal body guide including an insertion window through which the feed base is inserted, and a front Together are arranged with intervals equal to the thickness of the vertical and the dust-proof sealing body in a direction, the feed device of the sewing machine, characterized in that it comprises front and rear two guide surfaces for guiding the vertical movement of the dust-proof sealing member. A feed base guide, which is attached to the front surface of the sewing machine frame and through which the feed base is inserted and guides the back and forth movement of the feed base, an insertion hole through which the feed base is inserted, is provided, and the front surface of the feed base guide and the 2. The sewing machine feeding apparatus according to claim 1, further comprising an elastic sealing body that is guided by a rear surface of the elastic sealing body guide and moves up and down in conjunction with the feed base. The dust-proof seal body guide is formed separately from the elastic seal body guide, and includes a rectangular hole that opens at one or both of the upper end and the lower end, and the two front and rear guide surfaces are formed by the rectangular hole. 3. The sewing machine feeding apparatus according to claim 1, wherein the sewing machine is formed by a front surface and a rear surface. The dust-proof seal body guide is formed separately from the elastic seal body guide, and is disposed opposite to the rectangular recess provided on the front surface or the rear surface of the dust-proof seal body guide and the rectangular recess, and the feed base is inserted therethrough. And a dustproof seal body cover provided with a window that allows the feed base to move up and down, and the two front and rear guide surfaces are a bottom surface of the rectangular recess and the dustproof surface facing the bottom surface of the rectangular recess. 3. The sewing machine feeding device according to claim 1, wherein the sewing machine feeding device is formed by an opposing surface of the seal body cover. The dustproof seal body guide is formed integrally with the elastic seal body guide, and is disposed opposite to the rectangular recess provided on the front surface of the dustproof seal body guide, the rectangular recess, and the feed base is inserted and the A dustproof seal body cover provided with a window that allows the feed base to move up and down, and the two front and rear guide surfaces are a bottom surface of the rectangular recess and the dustproof seal body cover facing the bottom surface of the rectangular recess. The sewing machine feeding device according to claim 1, wherein the sewing machine feeding device is formed with a facing surface of the sewing machine. The dust-proof seal body guide is formed integrally with the elastic seal body guide, and includes a rectangular hole whose upper end or lower end or both upper and lower ends open, and the two front and rear guide surfaces are connected to the front surface of the rectangular hole. The sewing machine feeding device according to claim 1, wherein the sewing machine feeding device is formed on a rear surface.

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