JP7290093B2 - flat sewing machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat sewing machine that sews a plurality of works while feeding them in a predetermined direction, and more specifically, to a flat sewing machine that sews works while tilting and positioning the works.

In the sewing operation of this type of flat sewing machine, a plurality of works are stacked on a substantially flat upper surface of a bed and sewn while feeding the works in a predetermined direction. At this time, it is necessary to send out each work while appropriately positioning it so that the sewing line for sewing the works does not bend in an unintended direction. For example, when sewing a work, the work may rotate around the sewing needle, and if the operator does not properly position the work, the sewing line will bend in an unintended direction. Therefore, in the flat sewing machine disclosed in Patent Document 1, the bed and the head (sewing machine main body) are installed in an inclined state with respect to the machine base. In this flat sewing machine, the sewing machine table of the bed on which the work is to be placed is inclined approximately 45° in the left-right direction when the work is fed in the front-rear direction. A fixed guide extending in the front-rear direction is provided at the lower end of the sewing table, and the fixed guide can support the edge of the workpiece on the sewing table. By tilting a single piece of work on the sewing machine table and supporting it with a fixed guide, the work can be positioned so as not to rotate as much as possible during sewing work, thereby contributing to the reduction of the burden on the operator. .

Japanese Utility Model Laid-Open No. 59-105475

By the way, in the technique of Patent Document 1, the sewing machine body is installed at an angle with respect to the machine base. . For this reason, the configuration of Patent Document 1 may cause mechanical problems such as an unintended load being applied to the sewing machine main body. Further, in the technique disclosed in Patent Document 1, the work during sewing moves in a predetermined direction while receiving friction (resistance) from the sewing machine table. Since the sewing machine table is generally flat, the resistance applied to the workpiece is generally constant at any point on the sewing machine table. Such a configuration is intended for sewing a single type of work in rotation, but is not suitable for sewing a wide variety of works in various patterns. For example, when performing straight stitching on the edge of each work, it is desirable that the resistance when moving in the feed direction of the work is small. When the edges of each workpiece form a circular arc, the workpieces are rotated so that the edges of the workpieces are sequentially directed toward the sewing needle. It is desirable that there is little resistance when doing so. The present invention has been devised in view of the above points, and the problem to be solved by the present invention is to reduce the resistance received by the works in accordance with the direction of movement of the works, and to position the works by tilting them with good performance. to sew.

As a means for solving the above-mentioned problems, a flat sewing machine of the first invention comprises a bed and a head forming a sewing machine body, and a plurality of works arranged on the upper surface of the bed are fed in a predetermined direction while sewing needles of the head are provided. sew with In this type of flat sewing machine, it is desirable to be able to tilt and position the workpieces with good performance while reducing the resistance received by the workpieces in accordance with the movement direction of the workpieces.

Therefore, in the present invention, a positioning mechanism for each workpiece is installed on the upper surface of the bed, and the positioning mechanism includes a support member arranged on one side of the sewing needle and a and a guide member located on the other side of the sewing needle opposite to the needle. The support member has an inclined portion that can be gradually inclined upward with respect to the upper surface of the bed as the distance from the sewing needle increases. It is configured to be positioned by abutting on. Furthermore, the inclined portion is provided with an assisting mechanism that reduces the resistance received by the workpiece from the inclined portion and assists the movement of each workpiece. In the present invention, the head has a feeding leg for feeding a plurality of works in a predetermined direction, and the sewing machine needle is pierced through each work through the through hole of the feeding leg. is divided into a pre-sewing region in which the work portion before sewing is arranged and a post-sewing region in which the work portion after sewing is arranged with reference to the end of the feed leg on the sending side, the guide member is: The front guide portion is formed linearly to cover the entire length of the inclined portion in the feeding direction of the work, and is arranged in the pre-sewing area so as to abut on the work portion before sewing by being arranged opposite to the support member. and a rear side guide portion arranged in the post-sewing region so as to abut on the work portion after sewing. In the present invention, a positioning mechanism separate from the sewing machine body is installed on the upper surface of the bed, and each workpiece is tilted and positioned by the support member and guide member of this positioning mechanism. Therefore, according to the present invention, the workpieces can be positioned and sewn together without tilting the sewing machine body, so that the load on the sewing machine body can be reduced. By assisting the movement of each work (for example, movement in the feed direction or in a direction perpendicular to the feed direction) by the acceleration mechanism, it is possible to sew a wide variety of works. .

A flat sewing machine according to a second aspect of the present invention comprises a bed and a head forming a sewing machine main body, and sews a plurality of works placed on the upper surface of the bed with the sewing needles of the head while feeding them in a predetermined direction, wherein: A positioning mechanism for each workpiece is installed on the upper surface of the bed, and the positioning mechanism includes a support member arranged on one side of the sewing needle when viewed in a direction orthogonal to the feeding direction of the workpiece, and the one side of the needle. and a guide member arranged on the opposite side of the sewing needle, and the support member has an inclined portion that can be gradually inclined upward with respect to the upper surface of the bed as the distance from the sewing needle increases. In a state in which the workpieces are arranged on the inclined portion, the edges of the workpieces are positioned in contact with the guide member, and the inclined portion absorbs the resistance that the workpiece receives from the inclined portion. An assisting mechanism is provided for assisting the movement of each work by reducing the weight of the workpiece. a first inclined portion provided with the promoting mechanism in a predetermined arrangement; and a second inclined portion provided with the promoting mechanism in a different arrangement from the first inclined portion. Either one is arranged as the inclined portion at the installation portion via the mounting portion. In the present invention, it is possible to selectively use a plurality of types of inclined portions depending on the installation portion and the assembly portion. Therefore, the configuration of the assisting mechanism can be changed according to the moving direction of each work, and it is possible to more appropriately handle sewing of a wide variety of works.

A flat sewing machine according to a third invention is the flat sewing machine according to the first invention or the second invention, wherein the accelerating mechanism is formed by a plurality of rollers attached to the inclined portion in a state capable of coming into contact with the workpiece on the inclined portion. Each roller unit is configured to rotate so as to send out each work in its moving direction, thereby reducing the resistance applied to the work from the inclined portion. In the present invention, the rotation of the rollers that form the assisting mechanism makes it possible to more reliably reduce the resistance received by the work from the inclined portion, thereby contributing to the sewing of a wide variety of works.

A flat sewing machine according to a fourth aspect of the invention is the flat sewing machine according to the second aspect of the invention, wherein the supporting member has a position holding portion for holding the position of the inclined portion assembled to the installation portion. In the present invention, by positioning the inclined portion with respect to the installation portion by the position holding portion, it is possible to properly arrange the assisting mechanism with respect to the sewing machine main body.

A flat sewing machine according to a fifth invention is the flat sewing machine according to any one of the first to fourth inventions, wherein the positioning mechanism includes a base member that supports the support member while being installed on the upper surface side of the bed. It has a base member adjustment mechanism capable of adjusting the position of the base member with respect to the upper surface of the bed, and a support member adjustment mechanism capable of adjusting the position of the support member with respect to the base member. In the present invention, each adjustment mechanism can adjust the position of the base member with respect to the upper surface of the bed and the position of the support member with respect to the base member, so that a wide variety of works can be sewn more appropriately. It has become.

A flat sewing machine according to a sixth invention is a flat sewing machine according to any one of the first to fifth inventions, wherein a plate-like auxiliary member is detachably attached to the surface of the guide member facing the sewing needle. According to the present invention, the distance between the guide member and the sewing needle can be adjusted by the adjusting member according to the length of the seam allowance of the work, so that a wide variety of works can be sewn more reliably. It's becoming

According to the first aspect of the present invention, it is possible to perform sewing by tilting and positioning the works with good performance while reducing the resistance received by the works in accordance with the movement direction of the works. Further, according to the second invention, the resistance received by the work can be more appropriately reduced according to the movement direction of the work. Further, according to the third invention, the resistance received by the work can be more reliably reduced according to the movement direction of the work. Further, according to the fourth invention, the resistance received by the work can be further appropriately reduced according to the movement direction of the work. Further, according to the fifth invention, the works can be tilted to be positioned and sewn with better performance. Further, according to the sixth invention, the works can be tilted and positioned with better performance for sewing.

1 is a schematic perspective view of a flat sewing machine installed on a sewing table; FIG. FIG. 2 is a schematic see-through top view of a flat sewing machine installed on a sewing table; It is a schematic cross-sectional view of a flat sewing machine around sewing needles. It is a top view of a base member and an installation part. It is a partially see-through perspective view of the plain sewing machine which shows the inclination part which shows a promotion mechanism. It is an expansion perspective view of the inclination part which shows a promotion mechanism. FIG. 4 is a schematic enlarged top view showing an inclined portion and an installation portion before assembly; FIG. 4 is a schematic enlarged top view showing the inclined portion and the installation portion after assembly; FIG. 11 is a side view of the adjustment member; FIG. 4 is a front view of a base member, a support member and an adjustment member; It is a front view of the guide member in the retracted position. It is a perspective view of the upper surface of the bed with the hook for the bobbin thread exposed. It is a perspective view of a guide part and an auxiliary member. It is a longitudinal cross-sectional view of a guide part and an auxiliary member. It is a schematic sectional view of a part of plain sewing machine which shows an alignment mechanism. It is a schematic cross-sectional view of a portion of the plain sewing machine showing a state in which the alignment mechanism is removed. FIG. 4 is a perspective view of a seat cover using a work; FIG. 11 is a schematic perspective view of a part of the plain sewing machine in Sewing Example (1). FIG. 11 is a schematic perspective view of a portion of the plain sewing machine in Sewing Example (2). FIG. 11 is a schematic perspective view of a portion of the flat sewing machine in Sewing Example (3); FIG. 11 is a partially see-through perspective view of the plain sewing machine showing another inclined portion; FIG. 11 is an enlarged perspective view of another inclined portion; It is a schematic sectional drawing of the flat sewing machine around the sewing machine needle in the case of a sewing example (3). FIG. 11 is a schematic front view of an inclined portion of Modification 1; FIG. 11 is a schematic enlarged front view of an inclined portion of Modification 2; FIG. 11 is a schematic enlarged front view of an inclined portion of Modification 3; FIG. 11 is a schematic front view of an inclined portion of Modification 4; FIG. 11 is a schematic cross-sectional view of an inclined portion of Modification 4; FIG. 11 is a schematic cross-sectional view of an inclined portion of Modification 5; FIG. 11 is a schematic cross-sectional view of an inclined portion of Modification 6;

Embodiments for carrying out the present invention will be described below with reference to FIGS. 1 to 30. FIG. In each figure, arrows indicating the up-down direction, left-right direction, and front-rear direction of the sewing machine are shown as appropriate. Further, in the embodiments described below, the predetermined direction, which is the feeding direction of each work, is defined as the front-rear direction, and each work is fed from the front toward the rear during sewing work. The flat sewing machine 2 shown in FIG. 1 is an electric sewing machine for sewing a plurality of works, and includes a bed 4, a head 6, a positioning mechanism 10, and a detection member 70 (details of each configuration will be described later). . Here, the bed 4 and the head 6 are members corresponding to the sewing machine body of the present invention, and a control section (not shown) for controlling the sewing work is provided therein. The sewing machine bodies (4, 6) are placed on a sewing table SB facing an operator (not shown). An operation pedal (not shown) is arranged.

[Bed (sewing machine body)]
The bed 4 shown in FIG. 1 is a substantially cubic member fitted on the upper side of the sewing table SB, and the works (W1, W2) to be sewn can be placed on the side of the substantially flat upper surface 4a of the bed 4. can. The upper surface 4a of the bed 4 is arranged substantially flush with the upper surface of the sewing table SB. On the upper surface 4a of the bed 4, as shown in FIG. 2, a throat plate 4b and a sliding plate 4c are arranged generally along the upper surface 4a. The throat plate 4b is a substantially rectangular flat plate member when viewed from above, and includes a needle hole (not shown) arranged opposite to a sewing machine needle 7, which will be described later, and a feed dog (not shown) arranged around the needle hole. ). A slide plate 4c is provided on the right side of the throat plate 4b so as to be substantially flush with the throat plate 4b. Various members such as a thread cutting member (not shown) and a bobbin thread hook 5 are installed inside the bed 4 . The hook 5 for the bobbin thread is a substantially cylindrical member having a bobbin wound with a bobbin thread, and is covered with a sliding plate 4c arranged adjacent to the throat plate 4b. In this embodiment, the slide plate 4c is attached to the upper surface 4a of the bed 4 so as to be slidable (openable and closable) in the left-right direction. It can be slid to the right from the closed state. By sliding the slide plate 4c to the right to open it, the hook 5 for the bobbin thread is exposed on the upper surface 4a of the bed 4, and various operations such as changing the bobbin thread can be performed. .

[Head (sewing machine body)]
The head 6 shown in FIG. 1 is a cubic member that rises from the upper right of the bed 4 and protrudes leftward, and has a sewing needle 7 and a feed leg 8 . A sewing machine needle 7 is attached to the lower left side of the head 6 so as to be vertically movable, and is arranged directly above the needle plate 4 b of the bed 4 . A needle hole (not shown) for passing an upper thread is provided on the tip side of the sewing needle 7 . The feed leg 8 is a member that presses the works (W1, W2) on the bed 4 and feeds them backward, and is attached to the lower left of the head 6 so as to be able to move up and down. As shown in FIGS. 2 and 3 , the feed leg 8 is made of a plate material that is substantially U-shaped when viewed from above, and is arranged so as to surround the right and left sides of the sewing needle 7 . At the center of the feed leg 8, there is provided a groove-shaped through hole 8H for allowing the sewing machine needle 7 to pass through. It is possible.

The flat sewing machine 2 can sew and sew a plurality of works (W1, W2) as shown in FIGS. In this sewing operation (details will be described later), a plurality of works (W1, W2) are stacked on the upper surface 4a side of the bed 4 and then fed backward by the feed leg 8 and sewn by the sewing machine needle 7. As shown in FIG. As shown in FIG. 2, the upper surface 4a side of the bed 4 in this state is a pre-sewing area FA in which a work portion to be sewn is arranged, with a rear end 8E, which is an end of the feed leg 8 on the delivery side, as a boundary. , and a post-sewing area BA in which a work portion after sewing is arranged.

By the way, in the sewing work described above, referring to FIG. 18, it is necessary to take care so that the sewing line Y for sewing the works (W1, W2) is not bent in an unintended direction. That is, if the works (W1, W2) are not properly positioned, the works (W1, W2) may rotate about the sewing needle 7 and the sewing line Y may bend in an unintended direction. . For this reason, in the present embodiment, each workpiece (W1, W2) during sewing is tilted and positioned by an inclined portion 34 of the positioning mechanism 10, which will be described later. In this type of sewing machine configuration, assuming that a wide variety of works are sewn in various patterns, it is desirable that the resistance received by the work from the inclined portion 34 can be reduced in accordance with the movement direction. Therefore, in the present embodiment, the positioning mechanism 10, which will be described later, reduces the resistance received by the works in accordance with the direction of movement of the works, and the works are tilted and positioned with good performance for sewing. Each configuration will be described in detail below.

[Positioning mechanism]
A positioning mechanism 10 shown in FIGS. 1 and 2 is a mechanism for tilting and positioning a plurality of works (W1, W2), and is installed on the upper surface 4a of the bed 4. As shown in FIG. The positioning mechanism 10 is separate from the sewing machine main body (4, 6), and has a base member 20, a support member 30, and a guide member 40, as shown in FIGS. . In the positioning mechanism 10, the support member 30 and the guide member 40 can be attached to the base member 20 installed on the bed 4, and furthermore, a housing portion 60, which will be described later, is provided between the support member 30 and the guide member 40. ing. Moreover, the position of the base member 20 with respect to the upper surface 4a of the bed 4 and the position of the support member 30 with respect to the base member 20 can be adjusted by a plurality of adjustment mechanisms (27, 37).

[Base member]
The base member 20 shown in FIGS. 2 to 4 is a substantially rectangular flat plate member installed on the upper surface 4a of the bed 4, and has a cutout portion 22, which will be described later, and a plurality of types of insertion holes 24A, 24B, and 24C. are doing. Here, as shown in FIG. 2, the front and rear dimensions of the base member 20 are set to cover the front and rear edges 20a and 20b of the bed 4, respectively. projects from the upper surface 4a of the bed 4 toward the sewing table SB. The left and right dimensions of the base member 20 are set to allow the support member 30 and the guide member 40 to be installed. For example, in this embodiment, the left edge 20e of the base member 20 is stretched from the upper surface 4a of the bed 4 toward the sewing table SB with the right edges (20c, 20d) of the base member 20 positioned near the needle 7. you can let it out. It is desirable that the thickness dimension of the base member 20 is set so as to be approximately flush with the needle plate 4b of the bed 4 when installed on the upper surface 4a of the bed 4 .

A cutout portion 22 that is generally rectangular in top view is provided on the right edge side of the base member 20. The cutout portion 22 divides the right edge side of the base member 20 into a front right edge portion 20c and a rear right edge portion. 20d. When the base member 20 is installed on the upper surface 4a of the bed 4, the needle plate 4b and the slide plate 4c are arranged in the portion surrounded by the notch 22. As shown in FIG. The front right edge portion 20c of the base member 20 extends to the right while being arranged in front of the needle plate 4b, and the rear right edge portion 20d of the base member 20 is arranged behind the needle plate 4b. It protrudes to the right. A positioning mechanism 28, which will be described later, is provided on the right edge of the base member of this embodiment, and positioning with respect to the bed 4 can be performed by this positioning mechanism 28 (a positioning method will be described later).

2 to 4, the base member 20 has a first insertion hole 24A and a second insertion hole 24B for adjusting mechanisms (27, 37) to be described later, and an insertion hole for a guide member. 24C is provided. Each first insertion hole 24A indicated by a dashed line in FIG. 4 is a round hole-shaped through hole for a support member, which will be described later, and is arranged in a plane direction of the base member 20 in a well-balanced manner (in FIG. A common reference numeral 24A is attached to the first insertion hole). That is, a pair of left and right first insertion holes 24A are provided on the front side, the rear side, and the front-rear center of the base member 20, respectively. 3 and 4, each of the second insertion holes 24B is an elongated through-hole for the bed, which penetrates the base member 20 in the thickness direction and extends linearly in the left-right direction. (In FIG. 4, for the sake of convenience, each third insertion hole is given a common reference numeral 24B). A pair of left and right second insertion holes 24B are provided on the front side and the rear side of the base member 20, respectively. 2 and 3, guide member insertion holes 24C are circular through holes for fastening guide members 40, which will be described later. (In FIG. 2, for the sake of convenience, the common reference numeral 24C is given to the formation position of the insertion hole for each guide member). The insertion holes 24C for these guide members are formed in rows on the front right edge portion 20c and the rear right edge portion 20d so as to straddle the notch portion 22. As shown in FIG.

[Support member]
The supporting member 30 shown in FIGS. 1 to 3 is a member that supports the workpieces (W1, W2) on the bed 4 in an inclined state, and includes an installation portion 32 and an inclined portion 34 (first assisting mechanism AT1). , an adjusting member 50 , an assembly portion 36 , and a position holding portion 39 . 2 and 4, the installation portion 32 is a plate-like member that is generally rectangular in top view, and can be installed on the left side of the base member 20. As shown in FIG. The front-to-rear dimensions of the installation portion 32 substantially match the front-to-rear dimensions of the base member 20 , and can be arranged so as to cover the pre-sewing area FA and the post-sewing area BA of the bed 4 . Further, the installation portion 32 has a lateral dimension shorter than that of the base member 20, and protrudes from the middle of the notch portion 22 of the base member 20 toward the left edge 20e of the base member 20. As shown in FIG. The installation portion 32 is provided with a plurality of types of insertion windows 32A and 32B as shown in FIG. That is, the installation portion 32 is provided with an elongated first insertion window portion 32A at a position corresponding to the first insertion hole 24A. Each first insertion window portion 32A is a through hole having substantially the same configuration except that the formation position is different, and all of them extend linearly in the left-right direction. Further, the installation portion 32 is provided with an elongated second insertion window portion 32B at a position corresponding to the second insertion hole 24B. Each insertion window portion 32B is a through hole having substantially the same configuration except that the formed position is different, and all extend linearly in the left-right direction.

[Incline part]
1 to 3 and 5 is a substantially rectangular plate-like member when viewed from above, and can support each work (W1, W2) in an inclined state. The front and rear dimensions of the inclined portion 34 substantially match the front and rear dimensions of the installation portion 32 . Moreover, the left and right dimensions of the inclined portion 34 are set to dimensions that can support the respective works (W1, W2), and typically can be set larger than the respective works (W1, W2). The inclined portion 34 shown in FIGS. 1 to 3 and 5 corresponds to the first inclined portion of the present invention, and has a plurality of first assisting mechanisms AT1 (see FIGS. 1 and 2). , for convenience, each first facilitating mechanism is shown simplified).

[First promotion mechanism]
The inclined portion 34 is provided with a plurality of first assisting mechanisms AT1 as shown in FIG. At the inclined portion 34, a plurality of first assisting mechanisms AT1 are arranged in a row in the left-right direction. A row of first assisting mechanisms AT1 is arranged at the front side, the rear side, and the front-rear center so as to substantially cover the inclined portion 34 . Each of these first assisting mechanisms AT1 has a substantially rectangular shape elongated in the front-rear direction in a plan view of the inclined portion 34, and can assist the movement of each work in the forward-rearward direction, which is the feed direction. Since each of the first assisting mechanisms AT1 has substantially the same basic configuration except for the arrangement position, the details of the first assisting mechanism AT1 arranged on the left front side will be described below as an example. .

The first assisting mechanism AT1 shown in FIG. 6 is formed by arranging a plurality of roller portions 80 having the same configuration in the front-rear direction, and each roller portion 80 is rotatably supported by the inclined portion 34. . That is, each roller portion 80 is formed in a cylindrical shape facing left and right, and a left shaft portion 80a projecting from its left end and a right shaft portion 80b projecting from its right end are rotatable toward the adjacent inclined portion 34. pivoted on. Further, the peripheral surface of each roller portion 80 partially protrudes from the inclined portion 34 as shown in FIG. In this embodiment, the rollers 80 are configured to rotate so as to send out each work in the forward and backward direction, which is the feeding direction, as will be described later, thereby reducing the resistance applied to the work from the inclined portion 34. ing.

[Assembly part]
Here, the inclined portion 34 can be detachably attached to the installation portion 32 via a plurality of attachment portions 36 shown in FIG. Each mounting portion 36 is a hinge-like portion that connects the right edge side of the installation portion 32 and the lower edge side of the inclined portion 34, and is provided at an appropriate interval in the front-rear direction. Since each assembly portion 36 has substantially the same configuration except for the arrangement position, the details of one assembly portion 36 will be described below as an example. Referring to FIG. 7, the mounting portion 36 includes a first mounting portion 36A provided on the right edge side of the upper surface of the installation portion 32 and a second mounting portion 36A provided on the lower edge side of the lower surface of the inclined portion 34. It is formed with the part 36B. The first assembly portion 36A includes a flat plate-shaped first fixing seat 361 fastened to the installation portion 32, a semi-cylindrical shaft fixing portion 362 provided on the front side of the first fixing seat, and a rear portion of the shaft fixing portion 362. and a rotating shaft portion 363 protruding toward the end. The second mounting portion 36B has a flat second fixed seat 364 fastened to the inclined portion 34 and a semi-cylindrical bearing portion 365 fixed to the rear side of the second fixed seat 364. there is A shaft hole 366 into which the rotating shaft portion 363 is rotatably inserted is formed in the bearing portion 365 , and the opening of the shaft hole 366 is provided on the front end surface of the bearing portion 365 .

[Formation of support member (attachment of inclined part to installation part)]
7 and 8, by moving the lower edge of the inclined portion 34 forward while applying it to the right edge of the installation portion 32, the rotating shaft portion 363 of the first assembly portion 36A is moved to the second assembly. It is inserted into the shaft hole 366 of the attaching portion 36B. By assembling the first assembly portion 36A and the second assembly portion 36B so as to be relatively rotatable about the rotating shaft portion 363, the hinge-shaped assembly portion 36 is formed. Then, the inclined portion 34 is detachably attached to the installation portion 32 via the hinge-shaped attachment portion 36, and the inclined portion 34 becomes tiltable. That is, referring to FIG. 3, the slanted portion 34 is gradually upward with respect to the installation portion 32, which is installed on the upper surface 4a of the bed 4, toward the left (separate from the sewing needle) with each assembly portion 36 as a base point. can be tilted to The inclined portion 34 in the assembled state shown in FIG. By positioning the inclined portion 34 with respect to the installation portion 32 in this manner, the first assisting mechanism AT1 can be appropriately arranged with respect to the sewing machine needle 7 and the like (sewing machine main body) during sewing shown in FIG. can be done.

[Position holding part]
The position holding portion 39 shown in FIGS. 4, 7 and 8 is a portion for holding the position of the inclined portion 34 assembled to the installation portion 32. In this embodiment, the position holding portion 39 is located on the right rear side of the upper surface of the installation portion 32. is provided in The position holding portion 39 is provided to restrict the rearward movement of the inclined portion 34 in the assembled state, and is positioned at the rearmost portion of the assembly portion 36 shown in FIGS. It is arranged close to the side assembly 36). The position holding portion 39 has a guide plate portion 39a, a holding bracket 39b, a contact arm portion 39c, an operation lever portion 39d, a slide shaft 39e, and a link arm 39f. Here, the guide plate portion 39a is a plate member fixed to the right edge side of the installation portion 32, and has a rectangular shape that is elongated left and right when viewed from above. Between the guide plate portion 39a and the mounting portion 36 on the rear side, a gap portion 39X is provided to allow insertion of a contact arm portion 39c, which will be described later.

A holding bracket 39b shown in FIG. 7 is a member that holds each member except for the guide plate portion 39a. are placed in The holding bracket 39b is a rectangular plate that is elongated in the left and right direction when viewed from above. ing. A contact arm portion 39c is fixed to the right end side of the slide shaft 39e at a position facing the gap portion 39X. The contact arm portion 39c is a plate-like member elongated in the left-right direction toward the gap portion 39X, and the right end side of the slide shaft 39e is fixed to the standing wall-like portion of the left edge of the contact arm portion 39c. A lever shaft 392 is erected on the left side of the holding bracket 39b, and the operating lever portion 39d is rotatably supported on the lever shaft 392. As shown in FIG. The operation lever portion 39d is a rectangular plate member when viewed from above. can be rotationally displaced.

7 and 8, the operation lever portion 39d is rotationally displaced from the state facing the rear side to the state facing the front side, thereby inserting the contact arm portion 39c into the gap portion 39X. be able to. That is, the pivoting motion of the operating lever portion 39d is converted into lateral motion of the slide shaft 39e and the contact arm portion 39c via the link arm 39f. The link arm 39f is a boomerang-shaped plate material, and its right end is axially connected to the left end of the slide shaft 39e. The left end of the link arm 39f is axially connected to the left side of the base end of the operation lever portion 39d facing rearward. When the operating lever portion 39d faces rearward as shown in FIG. 7, the link arm 39f is arranged on the front side of the lever shaft 392 and the slide shaft 39e is positioned on the left side. In this state, the contact arm portion 39c fixed to the slide shaft 39e is retracted to the left of the gap portion 39X. By rotating the operation lever portion 39d forward as shown in FIG. 8, the link arm 39f gradually moves rightward, and the slide shaft 39e and the contact arm portion 39c move rightward. push in. When the operating lever portion 39d faces rearward, the contact arm portion 39c is inserted into the gap portion 39X between the guide plate portion 39a and the mounting portion 36 on the rear side. The abutment arm portion 39c inserted into the gap portion 39X thus abuts against the rear assembly portion 36, thereby preventing the rearward movement of the inclined portion 34 and holding the position.

[Adjustment member]
The tilted portion 34 can adjust the tilt angle of the tilted portion 34 with respect to the installation portion 32 (upper surface 4a of the bed 4) with the adjustment member 50 shown in FIGS. The adjustment member 50 is a member capable of adjusting the inclination angle of the inclined portion 34 with respect to the installation portion 32 (upper surface 4a of the bed 4), and has a body frame portion 52 and an elevating portion 56 shown in FIGS. ing. The body frame portion 52 is a vertically elongated rectangular frame, and can hold an elevating portion 56 described later so as to be able to ascend and descend. By fastening the lower frame portion 52a of the body frame portion 52 to the installation portion 32 with the bolt material BM, the body frame portion 52 is installed in an upright state on the front left side of the installation portion 32. As shown in FIG. Between the upper frame portion 52b and the lower frame portion 52a of the body frame portion 52, an elevating mechanism 53 and a pair of front and rear support columns 54 and 55 are provided. The elevating mechanism 53 is a screw shaft-shaped member for elevating an elevating unit 56, which will be described later, and is arranged in the front-rear center of the body frame unit 52 while facing in the vertical direction. The elevating mechanism 53 is arranged on the upper frame portion 52b so as to be rotatable about the axis, and a handle-like operation portion 53a is attached to the upper end of the elevating mechanism 53 projecting from the upper frame portion 52b. By rotating or reversely rotating the elevating mechanism 53 using the operating portion 53a as a handle, an elevating portion 56, which will be described later, can be raised and lowered. The pair of front and rear support pillars 54 and 55 are columnar members facing in the vertical direction, and are fixed between the upper frame portion 52b and the lower frame portion 52a. The pair of support columns 54 and 55 are arranged symmetrically with the lifting mechanism 53 interposed therebetween.

4, 9 and 10 is a cubic member that moves up and down between the upper frame portion 52b and the lower frame portion 52a of the body frame portion 52, and is an arm projecting rightward. It has a portion 57 . The elevating section 56 is held by the main body frame section 52 in a state of being oriented in the front-rear direction, and the elevating mechanism 53 is rotatably screwed into a screw hole H1 provided in the center of the elevating section 56 . Corresponding support columns 54 and 55 are slidably inserted through through holes H2 and H3 provided on the front and rear sides of the elevation unit 56. The support columns 54 and 55 determine the posture of the elevation unit 56. is maintained. 4 and 10, the arm part 57 is a rectangular part projecting rightward from the lifting part 56, and bearing parts 57a protruding upward are provided at the front and rear ends of the arm part 57, respectively. . Vertically oriented wheels 58 are rotatably attached to the respective bearing portions 57a via shafts A projecting in the front-rear direction.

Then, as shown in FIG. 10, with the body frame portion 52 installed at the installation portion 32, each wheel 58 provided at the tip of the arm portion 57 is brought into contact with the rear side of the inclined portion 34 to support it. By rotating (reversely rotating) the elevating mechanism 53 in this state to raise (lower) the elevating section 56, the inclination angle of the inclined portion 34 is adjusted. That is, the lifting mechanism 53 is rotated to lift the lifting section 56 together with the wheels 58 . By doing this, the inclined portion 34 supported by each wheel 58 rises from the assembly portion 36, and the inclination angle with respect to the installation portion 32 increases (inclines from θ1 to θ2). Conversely, the elevating mechanism 53 is reversely rotated to lower the elevating section 56 together with the wheels 58 . By doing this, the inclined portion 34 supported by each wheel 58 falls down starting from the assembly portion 36, and the inclination angle with respect to the installation portion 32 decreases (the inclination angle changes from θ2 to θ1).

[Guide member]
The guide member 40 shown in FIGS. 1 to 3 is a member that receives the edge (WE) of each workpiece (W1, W2) in an inclined state. As shown in FIGS. 2 and 3, the guide member 40 has a bottom wall portion 42 and a vertical wall portion 44 forming a main body portion, a hinge plate 45, a plurality of installation plates 46, and a magnet portion 44M which will be described later. ing. Here, the main body portion of the guide member 40 is a plate material extending in the front-rear direction, is formed in a substantially L-shape when viewed from the side, and has a bottom wall portion 42 and an upright wall portion 44 . The bottom wall portion 42 is a flat plate-like portion that is arranged substantially parallel to the base member 20 at the use position described later, and the vertical wall portion 44 is a flat plate-like portion that rises upward from the left end of the bottom wall portion 42 . is. 2 and 12, the bottom wall portion 42 is provided with an escape recess 43 formed by notching the right edge in a substantially rectangular shape. The escape recess 43 is formed at a position substantially aligned with the notch 22 of the base member 20, and is arranged above the hook 5 for the bobbin thread in the retracted position, which will be described later.

2 and 3, the body portions (42, 44) of the guide member 40 are connected to the left side of a pair of front and rear mounting plates 46 via a hinge plate 45. As shown in FIGS. Here, each installation plate 46 is a flat plate material having the same configuration except that the lengths are different, and a fourth insertion hole 46H is provided at a position coinciding with the corresponding guide member insertion hole 24C of the base member 20. there is In this embodiment, installation plates 46 are arranged corresponding to the front right edge portion 20c and the rear right edge portion 20d of the base member 20, respectively. In this state, the bolt member BM is inserted through the insertion hole 24C for the guide member of the base member 20 and the corresponding fourth insertion hole 46H of each installation plate 46 and fastened to the nut N, whereby each installation plate 46 is are placed on the right side of the base member 20 in an overlapping state. A bottom wall portion 42 and a vertical wall portion 44 forming the main body of the guide member 40 are connected to the left side of each installation plate 46 via a hinge plate 45 and installed on the right side of the base member 20 . In this state, the bottom wall portion 42 and the standing wall portion 44 extend linearly forward and backward across the notch portion 22 of the base member 20 and extend to the right side of the sewing needle 7 so as to face the support member 30 . placed.

Then, referring to FIG. 11, the guide member 40 can be displaced between the use position and the retracted position by rotating with each hinge plate 45 as a starting point. As shown in FIG. 3, the guide member 40 at the use position is arranged close to the right side of the sewing needle 7 and the feed leg 8, and is in a state in which it can come into contact with the edge (WE) of each work (W1, W2). It's becoming The bottom wall portion 42 in this position of use is arranged substantially horizontally so as to overlap the base member 20 , and the vertical wall portion 44 is spaced rightward from the sewing machine needle 7 . The left and right separation dimension X1 between the vertical wall portion 44 and the sewing needle 7 can be set in consideration of the dimension of the seam allowance of each work (W1, W2). Then, the guide member 40 can be displaced to a retracted position raised upward and rightward by a clockwise rotation about the hinge plate 45 shown in FIG. The guide member 40 at the retracted position is retracted to the right of the use position by tilting the bottom wall portion 42 to the right. Furthermore, in the guide member 40 at the retracted position, the escape recess 43 of the bottom wall portion 42 shown in FIG. 12 is arranged directly above the slide plate 4c. Therefore, when the sliding plate 4c is slid to the right to expose the hook 5 for the bobbin thread, the hook 5 for the bobbin thread can be exposed from the escape recess 43 of the guide member 40 at the retracted position. Become.

[Front side guide part, rear side guide part]
2 and 18, the guide member 40 can be divided into a front side guide portion 40A and a rear side guide portion 40B with the rear end 8E of the feed leg 8 as a reference. The front side guide portion 40A is a portion arranged in the pre-sewing area FA of the upper surface 4a of the bed 4, and extends linearly from the front edge 20a of the base member 20 to the rear end 8E of the feed leg 8. As shown in FIG. As will be described later, the front side guide portion 40A enables positioning of the work portion before sewing, which is about to rotate about the sewing needle 7. As shown in FIG. The rear side guide portion 40B is a portion arranged in the post-sewing area BA of the upper surface 4a of the bed 4, and extends linearly from the rear end 8E of the feed leg 8 to the rear edge 20b of the base member 20. there is The rear side guide portion 40B enables positioning of the work portion after sewing. The guide member 40 of this embodiment is a long guide in which the front side guide portion 40A and the rear side guide portion 40B are integrated (integrated), and each work can be stably fed.

[Auxiliary member]
Here, an auxiliary member 49 shown in FIGS. 13 and 14 can be attached to the guide member 40 as required. The auxiliary member 49 is a plate-shaped member having vertical and longitudinal dimensions following the vertical wall portion 44 of the guide member 40, and has a predetermined thickness dimension 49T (horizontal dimension). When the work has a short seam allowance, the auxiliary member 49 is attached to the left surface of the vertical wall portion 44 of the guide member 40 facing the sewing needle. By thus shortening the distance between the guide member 40 and the sewing needle 7 by the thickness dimension 49T of the auxiliary member 49, it is possible to perform appropriate sewing even when the workpiece has a short seam allowance.

An auxiliary member 49 shown in FIGS. 13 and 14 can be detachably attached to the guide member 40, and the vertical wall portion 44 is provided with a circular hole penetrating the vertical wall portion 44 to the left and right as a configuration that enables attachment and detachment. A shaped adjustment hole 44H and a magnet portion 44M are provided. Here, the magnet portion 44M is a plate-like member fixed to the right surface of the standing wall portion 44 with screws BS, and is exposed on the bottom side of the adjustment hole 44H. Further, the auxiliary member 49 is provided with a suction protrusion 49M that can be inserted into the adjustment hole 44H. The attraction convex portion 49M is a cylindrical portion that can be magnetically attracted to the magnet portion 44M. A plurality of the attraction protrusions 49M are provided at appropriate positions on the auxiliary member 49 according to the number and positions of the adjustment holes 44H and the magnet portions 44M. When the auxiliary member 49 is attached, the attracting convex portion 49M is inserted into the adjustment hole 44H and attracted to the magnet portion 44M, so that the auxiliary member 49 can be stably attached to the left surface of the standing wall portion 44. can. Further, the auxiliary member 49 can be removed from the standing wall portion 44 by manually pulling the auxiliary member 49 to the left to release the magnetic attraction between the attraction convex portion 49M and the magnet portion 44M.

In this embodiment, referring to FIG. 2, a magnet portion (44M) and an adjustment hole (not shown) are provided at the front end side and the rear end side of the vertical wall portion 44, so that the auxiliary member shown in FIG. 49 can be attached to the vertical wall portion 44 with good balance in the front and rear direction. 2 and 18, an adjusting hole (not shown) and a magnet portion 44M are also provided at a position near the sewing needle 7 of the standing wall portion 44. As shown in FIG. Therefore, the auxiliary member portion disposed near the sewing needle 7 is stably attached to the standing wall portion 44, and relatively short seam allowances can be properly sewn.

[Work for arranging the installation portion with respect to the base member (adjustment mechanism for support member)]
Then, referring to FIGS. 1 to 4, the installation portion 32 of the support member 30 is installed on the base member 20. As shown in FIG. At this time, the installation portion 32 can be detachably attached to the base member 20 by the support member adjustment mechanism 37 shown in FIG. This support member adjustment mechanism 37 is a mechanism capable of adjusting the position of the installation portion 32 with respect to the base member 20, and is configured to adjust the position of the first insertion hole 24A of the base member 20 and the first insertion window portion 32A of the installation portion 32 described above. and a bolt-shaped first insert BM1. When installing the installation portion 32, while adjusting the left and right positions of the installation portion 32 with respect to the base member 20, the first insertion holes 24A are arranged at appropriate positions of the long hole-shaped first insertion windows 32A. Keep In this state, each first insertion tool BM1 is fastened to the corresponding first insertion hole 24A through each first insertion window portion 32A, so that the installation portion 32 is attached to the base member 20 by the adjustment mechanism 37 for the support member. It can be installed so that the position can be adjusted. Further, since the installation part 32 can be removed from the base member 20 by removing the first insertion tool BM1 from each first insertion hole 24A, the installation part 32 is installed in the base member 20 in a detachable state. be able to.

[Installation work of base member for bed (adjustment mechanism for base member)]
1 to 4, the base member 20 is installed on the upper surface 4a side of the bed 4. As shown in FIG. At this time, the base member 20 can be detachably attached to the upper surface 4a of the bed 4 by means of the base member adjusting mechanism 27 shown in FIGS. This base member adjustment mechanism 27 is a mechanism capable of adjusting the position of the base member 20 with respect to the upper surface of the bed 4. 32B, a fastening hole SBH of the bed 4, and a second bolt-shaped insert BM2. Here, on the upper surface of the sewing table SB, which is on the side of the upper surface 4a of the bed 4, a circular fastening hole SBH is provided at a position corresponding to the second insertion hole 24B of the base member 20. is fitted with a helisert. When installing the base member 20, while adjusting the left and right positions of the base member 20 with respect to the upper surface 4a of the bed 4, the long hole-shaped second insertion holes 24B and the second insertion window portion 32B are appropriately positioned. , the fastening hole SBH is arranged in advance. In this state, each second insertion tool BM2 is fastened to the corresponding fastening hole SBH through each second insertion hole 24B and second insertion window portion 32B, whereby the base member 20 is adjusted by the adjustment mechanism 27 for the base member. It can be mounted on the upper surface 4a side of the bed 4 in a position-adjustable state. Further, since the base member 20 can be removed from the bed 4 by removing the second insert BM2 from the fastening hole SBH, the base member 20 can be detachably installed on the upper surface 4a of the bed 4. can.

1, 15 and 16, the position of the base member 20 with respect to the upper surface 4a of the bed 4 can be determined by an alignment mechanism 28 provided on the right edge thereof. The alignment mechanism 28 has a plate-like substrate portion 28a projecting rightward from the installation plate 46 of the base member 20, and a fixed-side convex portion 28b and a movable cap portion 28c provided on the substrate portion 28a. . The fixed-side convex portion 28b is a columnar portion fixed to the right side of the upper surface of the substrate portion 28a, and the movable cap portion 28c is a member that is attached to the fixed-side convex portion 28b so as to be vertically movable. The movable cap portion 28c is formed in a hollow cylindrical shape with an open bottom, and is fitted so as to cover the upper portion 281 side of the fixed side convex portion 28b in the lowered state. An insertion shaft 28d that protrudes downward is provided on the lower surface of the movable cap portion 28c, and the insertion shaft 28d is inserted through a hole (reference numeral omitted) that vertically penetrates the fixed-side convex portion 28b. The upper portion 281 of the fixed-side convex portion 28b is formed to have a U-shaped cross section, and the inner surface shape of the movable cap portion 28c follows the shape of the upper portion of the fixed-side convex portion 28b.

When the movable cap portion 28c is lowered, the insertion shaft 28d is passed through the hole 4H of the fixed plate 28e fixed to the upper surface 4a of the bed 4 (sewing table SB) through the fixed convex portion 28b. By inserting the insertion shaft 28d through the hole 4H of the fixing plate 28e in this manner, the position of the base member 20 with respect to the bed 4 is determined. The fixing plate 28e is retrofitted at an appropriate position on the upper surface 4a side of the bed 4 (sewing table SB) in consideration of the left and right positions of the base member 20. As shown in FIG. Relative movement between the base member 20 and the bed 4 is enabled by pulling up the movable cap portion 28c and removing the insertion shaft 28d from the hole 4H of the fixed plate 28e. The movable cap portion 28c is urged in the closing direction by an urging member (not shown), and is rotatable about the insertion shaft 28d with respect to the fixed-side convex portion 28b. Therefore, by rotating the movable cap portion 28c in an appropriate direction after raising it, it can be held on the upper end of the upper portion 281 of the fixed-side convex portion 28b.

[Accommodation part]
1 and 3, in the installed base member 20, the support member 30 and the guide member 40 are installed with an appropriate spacing in the left-right direction. A housing portion 60 is provided between them. The housing portion 60 is a rectangular space in a side view surrounded by the support member 30, the guide member 40, and the base member 20, and is formed continuously in the front-rear direction. As shown in FIG. 19, an accessory member WX sewn to the seam allowance of one work can be placed in the accommodating portion 60 as required. Examples of this type of attached member WX include a belt-like cloth material and a resin plate such as a bead.

[Detection member]
A detection member 70 shown in FIG. 1 is a part for detecting that the sewing end points of the plurality of works (W1, W2) have reached the sewing machine needle 7. As shown in FIG. As this type of detection member 70, a control unit of the sewing machine body (4, 6) that calculates the pitch number of the sewing thread (needle thread or bobbin thread) and a sewing end point of each work (W1, W2) can be detected. It is possible to use a sensor member. For example, in the present embodiment, a sensor member as the detection member 70 is installed on the left side (left surface, etc.) of the head 6 so as to be able to detect the vicinity of the front edge of each work (W1, W2) where sewing ends. Keep By transmitting the detection information of the detection member 70 to a control unit (not shown), it is possible to stop the work sewing operation at an appropriate timing. By controlling the sewing machine main bodies (4, 6) by the control unit, it is also possible to perform backstitching on the front edge side of each work (W1, W2) at the timing of the end of sewing, or to cut the sewing thread with a thread cutting member. can.

[Sewing example (1) with a flat sewing machine]
The flat sewing machine 2 shown in FIGS. 1 and 3 can sew, for example, a work forming part of the seat cover SC shown in FIG. 17. In the sewing example (1) shown in FIG. A case of sewing will be explained. Both the first work W1 and the second work W2 are substantially rectangular cloth materials, and constitute the top plate main portion S1 of the seat cover SC of the vehicle seat shown in FIG. The top plate main portion S1 constitutes a substantially flat central portion of the seat cover SC, and the works W1 and W2 are arranged substantially flat. When sewing by the flat sewing machine 2 shown in FIG. 18, the first work W1 and the second work W2 are overlapped and arranged on the upper surface 4a side of the bed 4. As shown in FIG. In each of the works W1 and W2 in this state, the right edge WE, which serves as a seam allowance, extends substantially linearly in the front-rear direction. .

In the sewing operation of the works W1 and W2 shown in FIG. 18, a sewing line Y (needle thread and bobbin thread) for sewing each right edge WE should be formed linearly in the front-rear direction. Care must be taken not to bend in an unintended direction. For example, if the works W1 and W2 are not positioned relative to each other, the works W1 and W2 may rotate about the sewing needle 7 and the sewing line Y may bend in an unintended direction. For this reason, in the flat sewing machine 2, the workpieces W1 and W2 are tilted to the left and right for positioning. At this time, excessive burden on the sewing machine body (4, 6) and the operator should be avoided as much as possible.

[Action of Positioning Mechanism (Inclined Portion)]
Therefore, in this embodiment, the positioning mechanism 10 is installed on the upper surface 4a of the bed 4, so that the supporting member 30 is installed on the left side (one side) of the sewing needle 7 when viewed in the horizontal direction, and the supporting member 30 is installed on the right side of the sewing needle 7. A guide member 40 is installed on the (other side). The support member 30 has an inclined portion 34 which can be gradually inclined upward with respect to the upper surface 4a of the bed 4 as the distance from the sewing needle 7 increases. , and the right edge WE of each work is positioned in contact with the guide member 40 . Furthermore, in the present embodiment, the lifting section 56 of the adjustment member 50 is lifted to raise the inclined portion 34, taking into consideration physical properties such as the weight and coefficient of friction of the respective works W1 and W2. In this way, as shown in FIG. 18, the inclined portion 34 is inclined at an appropriate inclination angle θ1 with respect to the installation portion 32, and the workpieces W1 and W2 are laid on the inclined portion 34. As shown in FIG. By bringing the right edge WE of each work into contact with the guide member 40, each of the works W1 and W2 can be positioned while tilted to the left and right.

Then, referring to FIG. 18, the works W1 and W2 positioned as described above are sent out from the front to the rear, and the right edge WE of each work is sewn with the sewing machine needle 7. As shown in FIG. At this time, the front side guide portion 40A of the guide member 40 is arranged in the pre-sewing area FA so as to abut on the work portion before sewing. Therefore, even if the works W1 and W2 try to rotate around the sewing needle 7, the front guide portion 40A can receive the rotational moment of the works W1 and W2, so that the work portions before sewing can be positioned more reliably. By preventing the rotation of the works W1 and W2 about the sewing needle 7 as much as possible, the sewing line Y can be neatly formed along the right edge WE of each work. Further, the rear side guide portion 40B of the guide member 40 is arranged in the post-sewing area BA so as to come into contact with the work portion after sewing. Therefore, the rear side guide portion 40B can position the work portion after sewing and smoothly feed it rearward.

[Action of the first promoting mechanism]
By the way, referring to FIG. 18, when the right edge WE of each work is straight-sewn, the works W1 and W2 receive little resistance from the inclined portion 34 when moving in the forward and backward direction, which is the feed direction. is desirable. Therefore, the inclined portion 34 of the present embodiment is provided with a first assisting mechanism AT1 that reduces the resistance received by the works from the inclined portion 34 and assists the movement of the works W1 and W2. The first assisting mechanism AT1 assists the movement of the works W1 and W2 in the feed direction, making it possible to sew a wide variety of works. That is, the positioned works W1 and W2 are in contact with the rollers 80 forming the first assisting mechanisms AT1. By rotating the rollers 80 so as to send out the works W1 and W2 forward, the resistance applied to the works from the inclined portion 34 can be reduced. For this reason, in the present embodiment, the resistance received by the work from the inclined portion 34 during the rotation of the rollers 80 forming the first assisting mechanism AT1 is more reliably reduced, so that the right edges of the works W1 and W2 are reduced. WE can be smoothly sewn in a straight line.

As described above, in this embodiment, during the sewing operation shown in FIG. is supported by By doing so, the workpieces W1 and W2 can be positioned so as not to rotate as much as possible during the sewing operation, thereby contributing to the reduction of the load on the sewing machine main body. Further, the rotation of the rollers 80 forming the first assisting mechanism AT1 makes it possible to more reliably reduce the resistance received by the work from the inclined portion 34, thereby contributing to the reduction of the burden on the operator. Since the positioning mechanism 10 can be designed separately from the sewing machine main body (4, 6), it has a high degree of freedom in design. In this way, according to the flat sewing machine 2 of this embodiment, it is possible to sew a wide variety of works without requiring a large change in the sewing machine main body (4, 6) or the sewing table SB. In addition, once the sewing machine 2 is started, the sewing work can be performed substantially automatically. Therefore, the quality and workability can be stabilized regardless of the skill level of the operator. Are suitable.

Then, when the sewing work is nearing the end, the detection member 70 shown in FIG. Finish the sewing work with . In this way, the detection member 70 automatically detects the timing at which the sewing of each of the works W1 and W2 ends, thereby contributing to the reduction of the burden on the operator. When the bobbin for the bobbin thread is to be replaced after the sewing work is completed, the sliding plate 4c is slid to the right as shown in FIG. to the retracted position. By exposing the hook 5 for the bobbin thread to the upper surface 4a of the bed 4 through the escape recess 43 of the guide member 40, it is possible to replace the bobbin for the bobbin thread without being disturbed by the guide member 40 as much as possible. becomes.

[Sewing example (2) using a flat sewing machine]
In the sewing example (2) shown in FIG. 19, the case where the first work W1 and the second work W2 are sewn will be described. A belt-like attached member WX is attached to the right edge side of the first work W1 as a seam allowance. ing. When the works W1 and W2 are used as a seat cover, the attached member WX is used to pull the seam allowances of the works W1 and W2 into the seat, and extends along the right edge of the first work W1 in the front-rear direction. extends to In such a case, the first work W1 is laid down on the second work W2, and the accessory member WX is arranged in the housing portion 60 provided between the support member 30 and the guide member 40. As shown in FIG. By doing so, it is possible to sew the first work W1 and the second work W2 without being disturbed by the attached member WX as much as possible.

In this embodiment, the mounting portion 32 of the support member 30 is mounted in a position-adjustable state with respect to the base member 20 by the support member adjustment mechanism 37 shown in FIG. Therefore, if the attachment member has a large lateral dimension, the lateral dimension of the housing portion 60 can be widened by arranging the installation portion 32 on the left side of the base member 20 shown in FIG. Further, when the lateral dimension of the attached member is small, the lateral dimension of the accommodating portion 60 can be narrowed by arranging the installation portion 32 on the right side of the base member 20 . Therefore, according to this embodiment, it is possible to form the accommodating portion 60 corresponding to the dimensions of the attached member, and to appropriately sew various works.

[Sewing example (3) with a flat sewing machine]
In the sewing example (3) shown in FIG. 20, the case of sewing the third work W3 and the fourth work W4 will be described. The third work W3 and the fourth work W4 are vertically elongated rectangular cloth materials, and constitute the top plate side portion S2 of the seat cover SC of the vehicle seat shown in FIG. The top plate side portion S2 constitutes a side portion of the top plate main portion in the seat width direction. Become. The third work W3 and the fourth work W4 have different shapes, and the lower right edges WE of the works W3 and W4 are arc-shaped. When the works W3 and W4 are to be sewn together as shown in FIG. 20, the guide member 40 is moved while moving the works W3 and W4 in the lateral direction of the support member 30 to appropriately align the seam allowances of the works. must be kept in contact with That is, when the right edge WE of each work is arc-shaped, the works W3 and W4 are rotated so that the right edge WE of each work is sequentially directed toward the sewing needle 7, and curved stitching is performed. When the right edge WE of each work is curvedly sewn in this manner, it is desirable that the works W3 and W4 receive less resistance from the inclined portion when moving in the horizontal direction, which is the direction perpendicular to the feeding direction. .

[Another slanted part (second slanted part)]
Therefore, referring to FIGS. 5 and 21, another inclined portion 34A is assembled to the installation portion 32 in place of the inclined portion 34. As shown in FIG. This other inclined portion 34A corresponds to the second inclined portion of the present invention, and is provided with a plurality of second assisting mechanisms AT2 in an arrangement different from that of the inclined portion 34 (first inclined portion). At another inclined portion 34A, as shown in FIG. 21, the second assisting mechanisms AT2 are provided in parallel so as to form a line in the front-rear direction. Each of these second assisting mechanisms AT2 has a generally rectangular shape elongated in the left-right direction in a plan view of the separate inclined portion 34A, and can assist movement in the left-right direction, which is a direction perpendicular to the feeding direction. can. Since each of the second assisting mechanisms AT2 has substantially the same basic configuration except for the arrangement position, the details of the second assisting mechanism AT2 arranged on the left side will be described below as an example.

The second assisting mechanism AT2 shown in FIG. 22 is formed by arranging a plurality of different roller portions 82 having the same configuration on the left and right. pivoted on. That is, each separate roller portion 82 is formed in a cylindrical shape facing forward and backward. It is rotatably supported by the 34A portion. Further, as shown in FIG. 23, the peripheral surface of each separate roller portion 82 partially protrudes from another inclined portion 34A, and is in a state in which it can come into contact with a work (such as W3) on another inclined portion 34A. It's becoming In this embodiment, the separate roller portions 82 are configured to rotate so as to send out the works W3 and W4 in the left-right direction, thereby reducing the resistance applied to the works from the separate inclined portions 34A. there is

In the sewing example (3) shown in FIG. 20, the movement of the workpieces W3 and W4 in the horizontal direction can be promoted by the second assisting mechanism AT2. That is, the separate roller portions 82 forming the respective second assisting mechanisms AT2 rotate so as to send out the works W3 and W4 in the horizontal direction, thereby reducing the resistance applied to the works from the separate inclined portion 34A. be able to. The works W3 and W4 in the pre-sewing area FA can be smoothly moved rightward toward the sewing needle 7 by rotating the respective rollers 82 so as to feed them rightward. . Further, each of the works W3 and W4 in the post-sewing area BA can be smoothly moved leftward away from the sewing needle 7 by rotating the separate roller portion 82 so as to send it out leftward. In this way, the rotation of each of the separate rollers 82 forming the second assisting mechanism AT2 more reliably reduces the resistance received by the work from the separate inclined portion 34A, so that the right edge WE of each of the works W3 and W4 is Curve sewing can be performed smoothly.

Here, in the sewing example (3) shown in FIGS. 20 and 23, by increasing the inclination angle of the separate inclined portion 34A with respect to the installation portion 32, there occurs between the separate inclined portion 34A and the works W3 and W4. Low friction is desirable. 10 and 20, the elevating portion 56 of the adjusting member 50 is further raised to increase the inclination angle of the other inclined portion 34A with respect to the installation portion 32 (from θ1 to θ2). In this way, by greatly inclining the separate inclined portion 34A to reduce the friction generated between the works W3 and W4, the works W3 and W4 can be sewn while smoothly moving left and right. . By the way, the third work W3 and the fourth work W4 after sewing have a three-dimensional shape following the side portions of the top plate, and tend to shift rightward in the post-sewing area BA of the bed 4 . Therefore, in the present embodiment, the rear guide portion 40B is arranged in the post-sewing area BA, so that the three-dimensional work portion after sewing can be smoothly forwarded rearward by the rear guide portion 40B, thereby enabling the work to be performed. It is a configuration that further contributes to the reduction of the burden on people.

As described above, in this embodiment, the positioning mechanism 10, which is separate from the sewing machine body (4, 6), is installed on the upper surface 4a side of the bed 4, and the support member 30 and the guide member 40 of the positioning mechanism 10 Each workpiece is tilted and positioned. Therefore, in this embodiment, the workpieces can be positioned and sewn without tilting the sewing machine main bodies (4, 6), so that the burden on the sewing machine main bodies (4, 6) can be reduced. The assisting mechanisms (AT1, AT2) facilitate the movement of each work (for example, movement in the feed direction or in a direction orthogonal to the feed direction), thereby making it possible to sew a wide variety of works. It is possible. In particular, in this embodiment, the rotation of the rollers (80, 82) forming the assisting mechanisms (AT1, AT2) makes it possible to more reliably reduce the resistance received by the work from the inclined portions (34, 34A). The configuration is conducive to sewing a wide variety of works. Therefore, according to the present embodiment, it is possible to perform sewing by tilting and positioning the works with good performance while reducing the resistance received by the works in accordance with the moving direction.

Furthermore, in this embodiment, a plurality of types of inclined portions (34, 34A) can be selectively used by the installation portion 32 and the mounting portion 36. FIG. Therefore, the configuration of the assisting mechanism (AT1, AT2) can be changed according to the movement direction of each work, and it is possible to appropriately handle sewing of a wide variety of works. Further, in this embodiment, the position holding portion 39 positions the inclined portions (34, 34A) with respect to the installation portion 32, so that the assisting mechanisms (AT1, AT2) are appropriately attached to the sewing machine main bodies (4, 6). It is possible to place it. Further, in this embodiment, the position of the base member 20 with respect to the upper surface 4a of the bed 4 and the position of the support member 30 with respect to the base member 20 can be adjusted by the adjustment mechanisms 27, 37, so that a wide variety of workpieces can be handled. It is possible to cope with sewing more appropriately. In addition, in this embodiment, the distance between the guide member 40 and the sewing machine needle 7 can be adjusted by the auxiliary member 49 according to the length of the seam allowance of the work, so that a wide variety of works can be sewn more reliably. It is possible to

[Modification 1]
Here, the positioning mechanism (inclined portion, promotion mechanism, etc.) can have various configurations in addition to the configurations described above. For example, the inclined portion 34B of Modification 1 shown in FIG. 24 has both the first assisting mechanism AT1 and the second assisting mechanism AT2. In this modified example, assuming that the edge of each work has an arc shape, the edge of each work is smoothly smoothed by providing a plurality of second assisting mechanisms AT2 on the front side of the inclined portion 34B. You can sew curved lines. Further, by providing a plurality of first assisting mechanisms AT1 on the rear side of the inclined portion 34B, the sewn works can be smoothly sent rearward by the respective first assisting mechanisms AT1.

[Modification 2]
Further, in the inclined portion 34C of Modified Example 2 shown in FIG. A second assisting mechanism AT2 is provided in the lower section. In this modified example, the work on the inclined portion 34C linearly contacts the peripheral surface of the roller portion forming each of the assisting mechanisms AT1 and AT2, thereby reducing resistance compared to the case where the work is in surface contact. can be reduced. Further, by providing the first assisting mechanism AT1 and the second assisting mechanism AT2 adjacent to each other, unintended excessive movement of each work can be avoided as much as possible. In addition, in this modification, when four sections are made into one group, a plurality or a single group of the sections can be provided in the inclined portion 34C. In addition, in this modified example, a plurality of types of promoting mechanisms may be arranged with a certain regularity, or may be arranged at random.

[Modification 3]
In addition, the inclined portion 34D of the third modification shown in FIG. 26 is subjected to punching processing such as punching metal processing, and the promoting mechanisms AT3 as holes are formed at equal intervals (in FIG. 26, one Only the assisting mechanism is numbered, the other assisting mechanisms are circled). As described above, in the inclined portion 34D of the present modified example, the resistance received by the work can be reduced by reducing the contact area with the work by the promotion mechanism AT3 as the hole. In this modified example, the resistance received by the work can be relatively easily adjusted by setting the number of the assisting mechanisms AT3 formed as holes, the separation distance, the arrangement position, and the like.

[Modification 4]
Further, the inclined portion 34E of Modified Example 4 shown in FIGS. 27 and 28 has a mesh-like (mesh-like) promoting mechanism AT4. The promoting mechanism AT4 is formed by arranging a first wire rod ATx extending in the front-rear direction and a second wire rod ATy extending in the left-right direction below the first wire rod ATx in a grid pattern. In this modified example, the work on the inclined portion 34E linearly contacts the first wire ATx forming the promoting mechanism AT4, thereby reducing the resistance in the front-rear direction compared to the case where the work is in surface contact. It becomes possible to Further, in this modified example, the inclined portion 34E can be used upside down. In such a case, the workpiece on the inclined portion 34E linearly contacts the second wire ATy forming the promoting mechanism AT4, thereby reducing lateral resistance compared to the case where the workpiece is in surface contact. can be reduced.

[Modification 5]
Further, an inclined portion 34F of Modified Example 5 shown in FIG. 29 is subjected to uneven processing such as knurling, and the promoting mechanism AT5 as a convex portion is formed with a certain regularity. As described above, in the inclined portion 34F of this modified example, the contact area with the work is reduced (substantially point or line contact) by the promotion mechanism AT5 as a convex portion, so that when the work is in planar contact, It is possible to reduce the resistance as compared to In addition, the promoting mechanism as the convex portion may have various shapes such as a rectangular cross section, a chevron shape, a semicircular shape, and the like. Further, the promoting mechanisms as the convex portions may be formed independently, or may be formed substantially continuously like a wave shape.

[Modification 6]
Further, an inclined portion 34G of Modified Example 6 shown in FIG. Only the assisting mechanism is denoted by AT6). As described above, even in the inclined portion 34G of this modified example, by reducing the contact area with the work by the promotion mechanism AT6 as a convex portion, it is possible to reduce the resistance compared to the case where the work is in surface contact. It becomes possible.

The flat sewing machine 2 of this embodiment is not limited to the embodiment described above, and can take various other embodiments. In the present embodiment, the configuration (shape, size, installation position, constituent members, etc.) of the positioning mechanism 10 has been exemplified, but the configuration of the positioning mechanism is not intended to be limited. For example, the positioning mechanism can be configured such that the support member and the guide member are directly installed on the upper surface of the bed, in which case the base member can be omitted. Moreover, the essential components of the positioning mechanism are the support member and the guide member, and the base member, the adjusting member, the accommodating portion, and the like can be omitted as necessary. Further, the detection member can be installed in the positioning mechanism instead of being installed in the sewing machine main body. For example, a contact-type or non-contact-type detection member using infrared rays, such as a limit switch, may be installed on the support member or the guide member. Note that the detection member can be omitted from the flat sewing machine if necessary. The position of the base member with respect to the upper surface of the bed can also be fixed, in which case the adjustment mechanism for the base member can be omitted. Also, the position of the support member with respect to the base member can be fixed, and in this case, the adjusting mechanism for the support member and the position holding section can be omitted. The adjustment mechanism for the base member and the adjustment mechanism for the support member can adopt various configurations such as a rail structure in addition to the configurations illustrated in the embodiments.

Further, although the configuration of the support member 30 is illustrated in this embodiment, the configuration of the support member is not intended to be limited. For example, the support member may have an inclined portion, and the inclined portion may be directly installed on the upper surface of the bed or the base member by omitting the installation portion. The inclined portion and the installation portion (or the base member) can also be made of a resin plate, and an integral hinge can be provided as a hinge portion between them. The structure of the adjustment member can also be changed as appropriate, and members such as air cylinders and hydraulic cylinders, link mechanisms, and the like can also be used. Note that the adjustment member can be installed at an appropriate position on the support member, the base member, or the sewing machine body according to its configuration.
Note that the installation portion can be attached in a state in which the front-rear or left-right position can be adjusted with respect to the base member. Also, as an alignment mechanism, a configuration such as a clip or a clamp can be used, and a plurality of holes can be provided in the fixing plate in the front and rear or left and right.

Further, as the configuration of the promotion mechanism, the configuration of the embodiment and the configuration of each modified example can be appropriately combined and used. Further, the inclined portion can be formed in a belt shape or a caterpillar shape, and an appropriate portion of the inclined portion can be pulled out and arranged at a position facing the sewing needle. In such a case, it is also possible to provide a plurality of types of promoting mechanisms in the inclined portion and use each of the promoting mechanisms properly by adjusting the amount of withdrawal of the inclined portion. Further, it is also possible to form a belt-roller-like promoting mechanism by winding a belt around each roller portion, so that each roller portion indirectly abuts the work through the belt. In addition to the roller part, the promotion mechanism can be formed by attaching a spherical part, a bead (abacus bead) part, or a prism part to the inclined part so as to be able to rotate (roll). can be collectively called

Further, although the configuration of the guide member 40 is illustrated in this embodiment, it is not intended to limit the configuration of the guide member. For example, the front end of the guide member can be rotatably attached to a shaft protruding from the upper surface of the bed, and can be displaced between the use position and the retracted position by rotating around the shaft. Further, the guide member can be attached to the base member in a vertically movable state, and in this case, can be displaced between the use position and the retracted position by the vertical movement. The guide member may be of any shape as long as it can receive the edge of each workpiece, and may be L-shaped, cubic, or any other shape, and may be fixed at the position of use. Further, the guide member can have a front side guide portion and a rear side guide portion in series, or each guide portion can be divided. The guide member has a front side guide portion as an essential component, and it is possible to omit the rear side guide portion as necessary. Auxiliary members can be attached to the guide member as necessary, and the configuration for attaching the auxiliary members can be various, such as attachment tools such as tape, adhesives, and joining members such as clips and clamps, in addition to the magnet part. It is also possible to assemble the auxiliary member and the standing wall by means of a rail structure (grooves extending back and forth and projections that fit into the grooves). Alternatively, the auxiliary member may be formed to have a U-shaped cross section and be fitted to the standing wall portion of the guide member from above. Also, in a configuration that does not use an auxiliary member, it is possible to omit a configuration such as a magnet portion from the guide member. The guide member can be attached to the base member in such a manner that the front-rear or left-right position can be adjusted in the same manner as the installation site.

Further, in the present embodiment, the configurations of the sewing machine main bodies (4, 6) and the sewing table SB are exemplified, but the configurations of the sewing machine main bodies and the sewing table are not intended to be limited. The sliding plate can be attached to the bed so as to be slidable and tiltable, or can be attached to the bed in a detachable manner. Examples of bobbin thread members include bobbin thread hooks (horizontal hooks and vertical hooks), their attachments, and various members such as thread cutting members. In addition to this, maintenance and replacement work of the hook itself and attached members can be exemplified. In addition to fabric and leather works, various types of works that can be sewn, such as resin plates, which are exemplified as attached members, can be exemplified as works. Various uses such as can be assumed.

SB Sewing table SBH Fastening hole 2 Flat sewing machine 4 Bed 4a Upper surface of bed 4b Needle plate 4c Slide plate 5 Bobbin thread hook 6 Head 7 Sewing needle 8 Feeding leg 8E Rear end of feeding leg 8H Through hole FA Pre-sewing area BA Post-sewn region 10 Positioning mechanism 20 Base member 20a Front edge 20b Rear edge 20c Base member front right edge 20d Base member rear right edge 20e Base member left edge 22 Notch 24A First Insertion hole 24B Second insertion hole 24C Insertion hole 27 for guide member Adjustment mechanism 28 for base member Alignment mechanism 28a Base plate portion 28b Fixed-side convex portion 281 Upper portion 28c of fixed-side convex portion Movable cap portion 28d Insertion shaft 28e Fixed plate 4H fixing plate hole 30 support member 32 installation portion 32A first insertion window portion 32B second insertion window portion 34 inclined portion (first inclined portion of the present invention)
34A Another angled portion (second angled portion of the present invention)
36 Mounting portion 36A First mounting portion 361 First fixed seat 362 Shaft fixing portion 363 Rotating shaft portion 36B Second mounting portion 364 Second fixed seat 365 Bearing portion 366 Shaft hole 37 Adjusting mechanism 39 for support member Position holding Portion 39a Guide plate portion 39b Holding bracket 39c Contact arm portion 39d Operation lever portion 39e Slide shaft 39f Link arm 39X Gap portion 391 Cylindrical portion 392 Lever shaft 40 Guide member 40A Front side guide portion 40B Rear side guide portion 42 Bottom wall portion 43 Relief Recessed portion 44 Standing wall portion 44M Magnet portion 44H Adjustment hole 45 Hinge plate 46 Each installation plate 46 Installation plate 46H Fourth insertion hole 49M Adsorption convex portion 49 Auxiliary member 50 Adjustment member 52 Body frame portion 52a Lower frame portion 52b Upper frame portion 53 Lifting mechanism 53a Operation part 54, 55 Support column 56 Lifting part 57 Arm part 57a Bearing part 58 Wheel A Axis H1 Screw holes H2, H3 Through hole 60 Storage part 70 Detection member AT1 First promotion mechanism 80 Roller part 80a Left shaft of roller part Part 80b Right shaft portion AT2 of roller portion Second promoting mechanism 82 Another roller portion 82a Front shaft portion 82b of another roller portion Rear shaft portion BM Bolt material BM1 First insert BM2 Second insert Equipment BS Screw N Nut SC Seat cover S1 Top plate main part S2 Top plate side part W1 First work W2 Second work W3 Third work W4 Fourth work WE Right edge WX of each work Attachment Y Sewing line 34B Deformation Inclined portion 34C of example 1 Inclined portion 34D of modified example 2 Inclined portion AT3 of modified example 3 Promotion mechanism 34E of modified example 3 Inclined portion AT4 of modified example 4 Promotion mechanism of modified example 4 ATx First wire ATY Second wire 34F Deformation Inclined portion AT5 of example 5 Accelerating mechanism 34G of modified example 5 Inclined portion AT6 of modified example 6 Accelerating mechanism of modified example 6

Claims (6)

A flat sewing machine comprising a bed forming a sewing machine body and a head, wherein a plurality of works arranged on the upper surface of the bed are sewn by sewing needles of the head while being fed in a predetermined direction,
A positioning mechanism for each work is installed on the upper surface of the bed, and the positioning mechanism includes a support member arranged on one side of the sewing needle when viewed in a direction orthogonal to the feeding direction of the work, a guide member disposed on the other side of the sewing needle opposite to the
The support member has an inclined portion that can be gradually inclined upward with respect to the upper surface of the bed as the distance from the sewing needle increases. The end is configured to be positioned in contact with the guide member,
The inclined portion is provided with an assisting mechanism that reduces the resistance received by the work from the inclined portion and assists the movement of each work,
The head has a feed leg for feeding the plurality of works in a predetermined direction, and the sewing machine needle is pierced through each work through a through-hole portion of the feed leg. When the upper surface is divided into a pre-sewing area in which a work portion before sewing is arranged and a post-sewing area in which a work portion after sewing is arranged with reference to the end of the feed leg on the delivery side,
The guide member is formed linearly so as to cover the entire length of the inclined portion in the feeding direction of the work, and is arranged opposite to the support member so as to contact the work portion before sewing. A flat sewing machine, wherein a front side guide part arranged in a front area and a rear side guide part arranged in the post-sewing area so as to abut against the work part after sewing are continuously provided. A flat sewing machine comprising a bed forming a sewing machine body and a head, wherein a plurality of works arranged on the upper surface of the bed are sewn by sewing needles of the head while being fed in a predetermined direction,
A positioning mechanism for each work is installed on the upper surface of the bed, and the positioning mechanism includes a support member arranged on one side of the sewing needle when viewed in a direction orthogonal to the feeding direction of the work, a guide member disposed on the other side of the sewing needle opposite to the
The support member has an inclined portion that can be gradually inclined upward with respect to the upper surface of the bed as the distance from the sewing needle increases. The end is configured to be positioned in contact with the guide member,
The inclined portion is provided with an assisting mechanism that reduces the resistance received by the work from the inclined portion and assists the movement of each work,
The support member has an installation portion on which the inclined portion is installed, and an assembly portion for detachably attaching the inclined portion to the installation portion,
Either a first inclined portion provided with the promoting mechanism in a predetermined arrangement or a second inclined portion provided with the promoting mechanism arranged in a different arrangement from the first inclined portion is used as the inclined portion. A flat sewing machine arranged at the installation site via an assembly section . The assisting mechanism is formed by a plurality of roller portions attached to the inclined portion in a state capable of coming into contact with the work on the inclined portion, and each roller portion directs the respective work in its moving direction. 3. A flat sewing machine according to claim 1 or 2, wherein the work is rotated so as to send out the work by reducing the resistance applied to the work from the inclined portion. 3. The flat sewing machine according to claim 2 , wherein said support member has a position holding portion for holding the position of said inclined portion assembled to said installation portion. The positioning mechanism includes a base member that supports the support member while being installed on the upper surface side of the bed,
2. A base member adjusting mechanism capable of adjusting the position of said base member with respect to the upper surface of said bed, and a supporting member adjusting mechanism capable of adjusting the position of said supporting member with respect to said base member. 5. The flat sewing machine according to any one of -4. The flat sewing machine according to any one of claims 1 to 5, wherein a plate-like auxiliary member is detachably attached to a surface of the guide member facing the sewing needle.

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