JPS5927599B2 - Sewing machine bed opening/closing device - Google Patents

Description

[Detailed Description of the Invention] This invention provides a method for attaching attachments for cutting fabric edges, buttonholes, initial sewing, etc. on the sewing machine bed. This invention relates to a sewing machine bed opening/closing device for opening and closing an opening, and its purpose is to enable a lid plate for opening and closing the opening to be substantially stored in an inclined state into the sewing machine bed by the opening operation. In addition to
An object of the present invention is to provide a novel sewing machine bed opening/closing device capable of connecting constituent members in the sewing machine bed to an attachment without being obstructed by a cover plate.

Below, the configuration of a sewing machine embodying the present invention will be described with reference to the drawings. In the drawing, 1 is a sewing machine arm, and as shown in FIG. 2 and presser foot 3 are attached.

Reference numeral 4 denotes a sewing machine bellet chiara, on which is fixed an upper plate 5 having a throat plate mounting hole 5a as shown in FIGS. 2 and 3, and a hook lid 6 on the left end of the front surface. It is installed so that it can be opened and closed.

Reference numeral 7 denotes a throat plate fitted and fixed in the throat plate attachment hole 5a of the upper plate 50 so as to form a workpiece support surface in cooperation with the upper plate 5, as shown in FIGS. As shown in FIG. 3, a needle hole 7a for zigzag sewing and an open lower lower b for a feed dog are formed on the left side thereof.

Reference numeral 8 denotes a horizontally long mounting opening formed in the front part of the throat plate 7 on the right side, and as shown in FIG. 2, the opening 8 has a pair of fitting holes 8a. A plate portion 8b is formed.

Reference numeral 9 denotes a guide member fixed to the lower surface of the upper plate 5 by a pair of mounting screws 10 in the mounting plate portion 9a so as to be located below the right end opening edge of the mounting opening 8;
As shown in FIG. 4, a contact plate part 11 is formed at the left end of the attachment plate part 9a, and the contact plate part 11 has an inclined contact surface 11a inclined downwardly to the right on the lower surface. A pair of regulating plate portions 12 are bent downward at the front and rear ends at substantially the same distance as the front and rear width of the mounting opening 80, and the lower end edges of the regulating plate portions 12 have the inclined contact surface on the upper surface. 1
Guide plate portions 13 each having an inclined guide surface 13a extending parallel to 1a are bent inward.

Reference numeral 14 denotes a cover plate which is movably arranged between the opposing left and right ends of the opening 80 and covers the mounting opening 8 of the throat plate 1 in an openable and closable manner, and when it is closed, the cover plate is moved as shown in FIG. is supported on the support plate part 8b in the mounting opening 8, and forms a workpiece support surface together with the upper surface of the throat plate 7, and when opened, the right edge of the mounting opening 8 and the right opening edge of the mounting opening 8 are supported, as shown in FIG. Sewing machine bed 4 from between the right edge of support plate portion 8b.
The guide portion body 130 and the inclined guide surface 13
The storage device is stored in an inclined state while its movement in the front and back direction is restricted between the pair of restriction plate portions 12 along the direction a.

15, as shown in FIGS. 2 to 4, a positioning protrusion 15a protruding from the upper surface of the base end is engaged with an engagement recess 16 formed on the lower surface of the right end of the lid plate 14, and the lid plate 1 is fixed with a fixing screw 17.
4 is a leaf spring as an elastic means fixed to the lower surface of the guide body 9, and its free end is provided with the inclined guide surface 13a of the guide body 9,
A pair of engagement pieces 15b that can engage with the inclined contact surface 11a or the lower surface of the mounting plate portion 9a are formed.

In this embodiment, the fixing screw IT constitutes a means for defining the movement range of the cover plate 14,
As shown in FIG. 9, when the cover plate 14 is pulled out from inside the sewing machine bed 4 to the maximum extent, the head of this fixing screw 17 is attached to the needle plate 1.
The movement of the cover plate 14 in the drawing direction is restricted so that the cover plate 14 does not separate from the guide body 9, and in this state, the plate spring 15 is engaged. The piece 15b engages with the inclined contact surface 11a of the guide body 9 to position the cover plate 14 substantially within a plane including the inclined guide surface 13a of the guide body 9, thereby resisting the elasticity of the leaf spring 15. Subsequent closing rotation of the cover plate 14 is permitted.

Reference numeral 18 denotes a locking member made of an elastic plate fixed to the lower surface of the left end of the cover plate 14 by a mounting screw 19, and the cover plate 14 closes against the elasticity of the plate spring 150 as shown in FIG. When the cover plate 14 is rotated to the closed position, the cover plate 14 is engaged with the left edge of the mounting opening 8 to lock and hold the cover plate 14 in the closed position.

In this embodiment, the locking body 18 also serves as means for defining the movement range of the cover plate 14,
When the cover plate 14 is stored in the sewing machine bed 4 in an inclined state as shown in FIG. The left upper end of the cover plate 14 is held in a state slightly exposed upward from the workpiece support surface, that is, the upper surface of the needle plate I.

20 is a recess formed near the upper end of the front surface of the sewing machine bed 4; 21 is a mounting boss protruding into the sewing machine bed 4 near the inside of the recess 20; 22 is a stepped screw 23 that connects the mounting boss 21; The operating body is swingably supported at the upper end of the operating body, and as shown in FIGS. An operating section 22a is formed that is slightly exposed on the front side, and an operating section 22b is formed at the upper left end that faces the lid plate 14 in the closed position from below.

Reference numeral 24 denotes a washer 25 and a stepped screw 23 on the upper surface of the operating body 22.
A compression spring is interposed between the head of the handle member and the head of the handle member, so that the operating member body 22 is biased and held at the original position shown in FIG. 5 so as to be rotatable.

When the operating unit body 22 is rotated counterclockwise from the state shown in FIG. 5 by pressing the operating unit 22a,
The actuating portion 22b comes into contact with the lower surface of the lid plate 14 in the closed position and provides the lid plate 14 with an upward floating blade so as to release the action of the locking body 18, thereby causing the lid plate 14 to Due to the elastic action of the leaf spring 150, as shown in FIG. and is stored in the sewing machine bed 4.

Next, with the cover plate 14 stored in the sewing machine bed 4 and the attachment opening 8 of the throat plate 7 open, the configuration of the filter fabric edge cutting attachment fixedly arranged near the opening 8 will be explained. To explain, 26 is an attachment frame that is supported on the support plate part 8b in the mounting opening 8 during installation, and as shown in FIG. A pair of positioning pins 2T are provided in a protruding manner to fit into the positioning pins 8a to position the attachment frame 26 at a predetermined position.

Reference numeral 28 denotes a locking lever rotatably attached to the attachment frame 26, and by rotating the locking lever 28, the locking portion 28a at the lower end of the locking lever 28 is released from the locking portion fixed on the upper plate 5. The attachment frame 26 is relatively engaged with the mating shaft 29 from below to fix the attachment frame 26 onto the throat plate I.

Reference numeral 30 denotes a recess formed at the right end of the lower surface of the attachment frame 26, and the upper left end of the cover plate 14 exposed on the upper surface of the throat plate 1 when the cloth edge cutting attachment is fixedly disposed as shown in FIG. It is designed to cover the area.

Reference numeral 31 denotes a protruding arm formed to protrude leftward from the front left side of the attachment frame 26, and as shown in FIG. The fixed blade 32 is attached so as to.

Reference numeral 33 denotes a movable blade attached to the tip of a drive arm 34 extending leftward from the operation mechanism in the attachment frame 26 so as to cooperate with the fixed blade 32 to constitute a cutting operation section. When the cutting attachment is in a fixed position, it is operatively connected to a moving mechanism such as a shuttle drive shaft provided in the sewing machine bed 4, and as the sewing machine is operated, the edge of the workpiece cloth is cut prior to oversewing. ing.

Note that 35 is a cover that covers the outer surface of the attachment frame 26, and 36 is a protection plate that releasably covers the drive arm 34, the front of the cutting operation section, and the outer periphery of the mounting screw of the sewing machine needle 2.

The operation of the sewing machine constructed as described above will now be described.

Now, FIG. 3 shows a state in which the cover plate 14 is locked and held in a position where the attachment opening 8 of the throat plate 7 is closed by the action of the locking member 18.

In this state, a wide workpiece support surface is formed on the top surface of the upper plate 5, throat plate I, and cover plate 14, so normal sewing operations can be smoothly performed using this workpiece support surface. I can do it.

When opening the mounting opening 8 of the needle plate 7 from this state in order to attach the fabric edge cutting attachment, the operating section 22a of the operating section body 22 exposed on the front surface of the sewing machine bed 4 is pressed down. Then, when the operating body 22 is rotated counterclockwise from the state shown in FIG.
b comes into contact with the lower surface of the lid plate 14 in the closed position, giving the lid plate 14 an upward floating blade, and the locking part body 18 causes the lid plate 1 to
4 is released.

As a result, the cover plate 14 is rotated clockwise to open from the closed position shown in FIG. 3 due to the elastic action of the leaf spring 15, and as shown in FIG. In a state in which the plate spring 15 is in contact with the opening edge and the engagement piece 15b of the leaf spring 15 is engaged with the inclined guide surface 13a of the guide body 9, the opening rotation of the cover plate 14 is prevented, and the cover plate 14 is not guided. It is located approximately within a plane that includes the inclined guide surface 13a of the part body 9.

Thereafter, the cover plate 14 is closed and rotated counterclockwise from the state shown in FIG. 6 due to the reaction of the plate spring 15, and when the engagement piece 15b of the plate spring 15 is disengaged from the inclined guide surface 13a, the cover plate 14 is guided by the inclined guide surface 13a and moved slightly into the sewing machine bed 4.

Then, as shown in FIG. 7, the lower surface of the right end of the cover plate 14 comes into contact with the right end edge of the support plate part 8b in the mounting opening 8, and the engaging piece 15b of the leaf spring 15 comes into contact with the inclined part of the guide body 9. While in contact with the contact surface 11a or the lower surface of the mounting plate portion 9a,
The closing rotation of the cover plate 14 is prevented, and from this state, the cover plate 14 is again rotated clockwise to open due to the elastic action of the plate spring 150, and the engagement piece 15b of the plate spring 15 moves toward the inclined contact surface 1.
1a or the lower surface of the attachment plate portion 9a, the cover plate 14 is moved into the sewing machine bed 4 along the inclined guide surface 13a.

In this way, the cover plate 14 is sequentially moved into the sewing machine bed 4 while being reciprocated clockwise and counterclockwise by the action of the leaf spring 150, and the leaf spring 15 is moved into contact with the guide body 9 as shown in FIG. After separating from the engagement position, the movement inside the sewing machine bed 4 is restricted between the pair of regulating plates 12 along the inclined guide surface 13a of the guide body 9 due to the force and weight of the cover plate 14. It is automatically stored in a tilted position downward to the right.

As shown in FIG.
When the cover plate 14 is still in contact with the upper surface on the right side of b, the storage operation of the cover plate 14 is stopped, and the cover plate 14 is held with its left upper end slightly exposed upward from the workpiece support surface, that is, the upper surface of the throat plate 7. Be it.

Therefore, in this state, the attachment opening 8 of the throat plate 7 is not blocked by the cover plate 14 (it is left wide open, and as shown in FIGS. It is possible to easily fix and arrange the attachment to connect the attachment with the components in the sewing machine bed, and also use the fabric edge cutting attachment to perform overlock stitching while cutting the edge of the work fabric. be able to.

Also, during this sewing process, as shown in FIG. A portion of the attachment frame 26 is located in the recess 30 on the lower surface of the attachment frame 26 and is covered by the attachment frame 26, so there is no fear that the cover plate 14 will get in the way and interfere with the sewing work, and the overall appearance of the sewing machine is improved. There is no harm to it.

Next, when removing the cloth edge cutting attachment from the state shown in FIG. 2 and closing the attachment opening 8 of the throat plate 7,
When the exposed end of the cover plate 14 is grasped and the cover plate 14 is pulled out from inside the sewing machine bed 4 to the upper left side, the head of the fixing screw 17 provided on the lower surface of the right end of the cover plate 14 as shown in FIG. engages with the right edge of the support plate portion 8b of the throat plate I, the pull-out operation is blocked, and in this state, the right edge of the cover plate 14 faces the right edge of the mounting opening 8, and the leaf spring The 15 engaging pieces 15b engage with the inclined contact surface 11a of the guide body 9, and the cover plate 14 is placed approximately within a plane including the inclined guide surface 13a of the guide body 9 at the maximum pulled out position. be done.

Thereafter, when the cover plate 14 is closed and rotated counterclockwise in FIG. 9 against the elasticity of the leaf spring 150, the locking body 18 is attached to the left end opening edge of the mounting opening 8 as shown in FIG. Upon engagement, the lid plate 14 is fixedly held in the closed position.

Note that this invention is not limited to the configuration of the above-mentioned embodiments, and the configurations of the cover plate, the guide body, the elastic means, the locking means, the operating body, etc. may be changed as desired without departing from the spirit of the invention. It is also possible to embody the sewing machine bed opening/closing device of the present invention by changing it to the above embodiment, and it is also possible to embody the sewing machine bed opening/closing device of the present invention for uses other than attachment of the cloth edge cutting attachment of the above embodiment.

As detailed above, the present invention provides a cover plate for opening and closing an opening formed in a part of the workpiece support surface of a sewing machine bed.
By opening the lid, the long cover plate can be stored in an inclined position within the sewing machine bed, so even though there is no large space in the height direction within the sewing machine bed, the long cover plate can be stored in an inclined position within the sewing machine bed. The sewing machine bed can be easily and sufficiently stored, and the workpiece supporting surface of the sewing machine bed can be sufficiently opened by storing the long cover plate.
The fabric edge cutting attachment can be easily attached, connected, etc., and there is no fear that the lid plate will interfere with sewing work, etc. in the open state, and this is an excellent effect.

Furthermore, if the elastic means and the operating body are provided as in the second invention of this application, the cover plate can be automatically stored in the sewing machine bed simply by operating the operating body when the cover plate is opened. This makes it extremely easy to open and close the lid plate.

[Brief explanation of the drawing]

Fig. 1 is a partial perspective view showing a sewing machine embodying the present invention in which a part of the opening on the workpiece support surface is opened and a fabric edge cutting attachment is attached, and Fig. 2 is a partially enlarged vertical sectional view. , FIG. 3 is a partial sectional view showing the state in which the fabric edge cutting attachment is removed and the lid plate is locked in the closed position, FIG. 4 is a partial sectional view taken along line 4-4 in FIG. 3, and FIG. 5 is a partial sectional view taken along line 5-5 in Fig. 3, and Fig. 6~
FIG. 8 is a partial cross-sectional view for explaining the process of storing the lid plate;
FIG. 9 is a partial sectional view showing a state in which the lid plate is pulled out to the maximum extent from the stored state. Sewing machine bed 4, upper plate 5, throat plate T1 attachment opening 8, guide body 9, inclined guide surface 13a, cover plate 14, leaf spring 15, fixing screw 17, locking body 18, operating body 22°

Claims (1)

[Scope of Claims] 1. A cover plate 14 for coverably opening and closing an opening 8 formed in a part of the workpiece support surface of the sewing machine bed 4, and the cover plate 1
'4 is mounted within the sewing machine bed 4 adjacent to one end of said opening 80 to guide and support the cover plate 14 so that said opening 80 can move between opposite ends thereof. an inclined guide surface 13a for storing and guiding the cover plate 14 in an inclined state within the sewing machine bed 4 when the cover plate 14 is opened;
a guide body 9 having: a means 17, 18 for defining a movement range of the cover plate 14 guided by the guide body 90 so that the cover plate 14 does not separate from the guide body 9; means 15 for allowing rotation of the cover plate 14 to close the workpiece support surface at a position where the cover plate 14 is guided by the guide body 9 and pulled out to the maximum extent from inside the sewing machine bed 4; 14 for immovably holding the cover plate 14 in the closed position, and when the opening 8 is opened by movement of the cover plate 14, the cover plate 14 is substantially retracted within the sewing machine bed 4. A sewing machine bed opening/closing device characterized in that the sewing machine bed is opened and closed. 2. The defining means 18 is configured to hold the upper end of the cover plate 14 in a state slightly exposed upward from the workpiece support surface when the cover plate 14 is stored in the sewing machine bed 4. A sewing machine bed opening/closing device according to claim 1. 3. A cover plate 14 formed in a part of the workpiece support surface of the sewing machine bed 4 to cover the opening 8 in an openable and closable manner, and a cover plate 14 so as to be movable between the opposite ends of the opening 80. In order to guide and support the cover plate 14, the cover plate 14 is mounted in the sewing machine bed 4 adjacent to one of its both ends, and when the opening 8 is opened, the cover plate 14 is tilted into the sewing machine bed 4. Is there an inclined guide for storing it in a closed state? ff113a; means 17.18 for defining a range of movement of the cover plate 14 guided by the guide body 90 so that the cover plate 14 does not separate from the guide body 9; means 15 for allowing rotation of the cover plate 14 to close the workpiece support surface at a position where the cover plate 14 is guided by the guide body 9 and pulled out to the maximum extent from inside the sewing machine bed 4; an elastic means 15 provided on the cover plate 14 and acting to position the cover plate 14 substantially within a plane including the inclined guide surface 13a of the guide body 9 in the maximally drawn out position; When the cover plate 14 is rotated to the closed position against the action of the elastic means 150, a locking means 18 is provided for holding the cover plate 14 in the closed position without being able to freely move, and the action of the locking means 18 is activated. It comprises an operating part body 22 that can be operated from the outside of the sewing machine bed 4 in order to release the sewing machine bed. When the operating part body 22 is operated, the cover plate 14 floats up by the action of the elastic means 150, and then the guide part body A sewing machine bed opening/closing device characterized in that it is guided by a sewing machine bed 9 and stored in a sewing machine bed 4. 4. The defining means 18 is fixed to the cover plate 14, and when the cover plate 14 is pulled out from inside the sewing machine bed 4 to the maximum extent, a part of the sewing machine bed 4 or the sewing machine bed 4 is
The sewing machine bed opening/closing device according to claim 3, further comprising a fixing screw 17 that abuts a member fixed to the sewing machine bed. 5. The elastic means 15 is fixed at its base end to one end of the cover plate 14 by a fixing screw 17, and in a position where the cover plate 14 is pulled out to the maximum extent from inside the sewing machine bed 4,
The sewing machine bed opening/closing device according to claim 3 or 4, comprising a leaf spring (15) whose free end engages with the guide body (9). 6. The operating part body 22 has one end facing the cover plate 14 in the closed position from below, and is manually operated so as to be able to engage the cover plate 14 upwardly against the action of the locking means 18. The sewing machine bed opening/closing device 17 according to any one of claims 3 to 5, which is configured to provide a floating blade to the sewing machine bed 4. When stored, the upper end of the cover plate 14 is held in a state slightly exposed upward from the workpiece support surface, and the exposed end of the cover plate 14 is disposed near the opening 8. Sewing machine attachment 2
6. The sewing machine bed opening/closing device according to any one of claims 3 to 6, which can be covered by a sewing machine bed.