JPS6030237B2 - Auxiliary bed device in sewing machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an auxiliary bed device for a sewing machine,
In particular, the present invention relates to an auxiliary bed device in which a space formed inside the auxiliary bed device can be opened wide with a one-touch operation, and which exhibits a good box-shaped bed appearance in the closed state.

In a sewing machine, it is desirable to provide a workpiece support surface of an appropriate size to facilitate sewing work.

Therefore, although the bed of a sewing machine is often of considerable size, there are usually relatively few mechanical parts to be accommodated within the bed. In this sense, the idea of ``using the auxiliary bed and accessory storage box'' as disclosed in Japanese Patent Publication No. 47-17588, Utility Model Publication No. 48-15503, etc. is appropriate. The present invention further develops this idea by making it possible to open and close the auxiliary bed of a sewing machine with one-touch operation, and in the open state, the space inside the auxiliary bed is largely closed, while in the closed state, the bed becomes a good box-shaped bed. This was done with the purpose of creating a similar appearance. In order to achieve the above object, the present invention forms a recess that is open toward the front or rear and upwards in the front or rear part of the bed portion of the sewing machine frame, and also forms a recess that is open toward the front or rear and upward. Or a shielding plate that can be rotated between an upright position that covers the rear and a collapsed position that opens it, and an auxiliary that can be rotated between a cover position that covers the upper part of this recess and an open position that opens it. A support plate and a link mechanism for opening and closing the shielding plate in conjunction with opening and closing of the auxiliary support plate are provided so that the recess can be opened and closed by a simple rotational operation of the auxiliary support plate. In the closed state, the auxiliary support plate and the shielding plate are substantially continuous with other parts, giving a good appearance of a box-shaped bed.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in more detail based on the drawings.

FIG. 1 is a general view of a sewing machine including an embodiment of the present invention, and a sewing machine frame 1 of this sewing machine is provided with a horizontal bracket arm 2. As shown in FIG.

The bracket arm 2 has a head 3 and a pedestal part 4 at both ends, and a lower end of the pedestal part 4 is supported by a base part 5. A bed part 6 extends from the base part 5 in parallel with the bracket arm 2, and a bottom plate part 7 is provided below the base part 5 and the bed part 6, and a base part 6 is provided with the bed part 6 in between. End wall portions 13 are arranged at positions facing each other. As most clearly shown in FIG. 2, a recess 8 that is open upward and forward is formed in the front portion of the sewing machine frame 1, which is generally composed of the above-mentioned parts.

That is, the recess 8 includes the front wall 11 of the bed section 6, the left end wall 12 of the base section 5 adjacent to one end of the front wall 11, the end wall 13 adjacent to the pond end of the front wall 11, and the bottom plate section. The rear, left and right sides, and the lower part are defined by a part of 7, respectively, and the upper and front parts are open. The upper entrance of this recess 8 is covered by an auxiliary support plate 14 .

The auxiliary support plate 14 is provided with mounting projections 15 and 16 on the lower surface near the rear edge of both ends, and these mounting projections 15 and 16 are attached to mounting brackets 21 and 22 fixed to the sewing machine frame 1 through pins 17 and 16, respectively. It is pivoted by a stepped screw 18 so that the auxiliary support plate 14 can be pivoted between the open position shown in FIG. 2 and the covered position shown in FIG. Further, the rotation of the auxiliary support plate 14 to the covering position occurs when the stopper portion 22 formed on the extension of the mounting bracket 22 comes into contact with the lower surface of the auxiliary support plate 14, and the extension of the mounting protrusion 15 is regulated by applying it to the back surface of the upper plate of the bed section 6, and in this state, the first
As shown in the figure, an auxiliary workpiece support surface 25 constituted by the auxiliary support plate 14 is configured to form a substantially continuous plane with a main workpiece support surface 26 constituted by the upper plate of the bed portion 6. Further, the front opening of the recess 8 is formed by a shielding plate 27.
is shielded by

As shown in FIG. 2, the shielding plate 27 is provided with mounting projections 28 and 29 on the back surface near the lower green end of both ends.
, 29 are pivotally attached to mounting brackets 31, 32 fixed to the sewing machine frame by pins 33, 34, so that the shielding plate 27 can be moved between the collapsed position shown in FIG. 2 and the upright position shown in FIG. It is possible to rotate between The rotation of the shielding plate 27 to the upright position is assisted by the free end of the shielding plate 27 hitting the locking protrusion 35 provided at the free end of the auxiliary support plate 14, as shown in FIG. In this state, the outer surface of the shielding plate 27 is substantially continuous with the outer surface of the base portion 5, as shown in FIG. Further, at the upper end of the shielding plate 27, a recess 37 for placing a finger is formed to operate the auxiliary support plate. The shielding plate 27 is connected to the auxiliary support plate 14 by a link mechanism 36, and both rotate in conjunction with each other.

The link mechanism 36 includes a first link 38 fixed to the auxiliary support plate 14, and a free end of the first link 38 and the shielding plate 2.
7 and a second link 39 connecting the free end portion of the second link 7 with the free end portion of the second link 39 . The first link 38 is fixed to the mounting projection 16 of the auxiliary support plate 14 by a screw 41 and the stepped screw 18 for pivotally mounting the auxiliary support plate 14, and rotates integrally with the auxiliary support plate 14. do. The second link 39 is pivotally connected at one end to the first link 38 by a stepped pin 42 and at the other end to the protrusion 44 of the shielding plate 27 by a stepped screw 48. The hole 45 is an elongated hole, and a degree of freedom is provided between the rotation of the auxiliary support plate 14 and the rotation of the shielding plate 27 by the maximum hole 45. The meaning of this will be explained later. Further, the shielding plate 27 is provided with spring means 46 that always urges it toward the upright position, while the auxiliary support plate 14 is provided with holding means 47 that stably holds it in both the cover position and the open position. With these, the auxiliary bed device of this embodiment is configured to be able to stably maintain both the closed state and the open position.

In this embodiment, the spring means 46 is iron-loaded to the pin 34 for pivotally mounting the shielding plate 27 to the mounting bracket 32, and has both ends engaged with the shielding plate 27 and the mounting bracket 32. It is composed of a coil spring 48. In this embodiment, the holding means 47 includes a cam body 49 formed adjacent to the mounting protrusion 16 of the auxiliary support plate 14 and a leaf spring 52 fixed to the mounting bracket 22 with a screw 51. It is configured. The free end of the leaf spring 52 is always engaged with the cam body 49, and the cam body 49 allows the leaf spring 52 to deflect most when the auxiliary support plate 14 is located in the middle of the rotation range. , the shape is such that the rotation is minimized at both ends of the rotation range. Therefore, the leaf spring 52 has the auxiliary support plate 14 in the third position.
When the cover is in the cover position shown by the solid line in the figure, it is further biased in the closing direction, and when it is in the open position shown by the two-dot chain line, it acts to hold it in that position. The link mechanism 36, spring means 46, holding means 47, etc. described above are covered by a cover 53.

That is, the cover 53 shown in FIG. 2 is fixed to the force bar mounting portion 59 of the mounting bracket 32 with screws 54, thereby covering as much of the above-mentioned movable parts as possible.
This prevents the parts storage box, speed acceleration controller, etc. stored in the recess 8 from interfering with each movable part. Further, ventilation holes 55 and 56 are provided in the left end lid 12 of the base portion 5 and the cover 53 that define the right side of the recess 8, and the upper end of the end wall 13 and the auxiliary support plate 14 facing these are provided. As shown in Fig. 1, an opening □5 for ventilation is formed between the two. This is to help dissipate heat from the sewing machine motor 58 housed within the base portion 5, as shown by the broken line in FIG. That is, the sewing machine motor 58 is equipped with a cooling fan, which sucks air from a ventilation hole (not shown) provided on the right end wall of the base portion 5, and uses this air to cool itself. As a result, the heated air flows into the recess 8 through the ventilation holes 55 and 56 and flows out through the opening 57, and in this embodiment, the recess 8 also serves as an exhaust duct. Further, as shown in FIG. 2, the front wall 11 of the bed portion 6 defining the rear of the recess 8 is provided with a gate 62 for attaching and detaching the bobbin case to the hook 61. An operating knob 64 for raising and lowering the camera (see figure) is arranged.

Since the auxiliary bed device of this embodiment is configured as described above, when the sewing machine is not in use, the parts storage box, the controller, etc. are stored in the recess 8, and the auxiliary support plate 14 and the shielding plate 27 are It can be contracted in the closed state as shown in Figure 1.

Furthermore, when the sewing machine is used, when the sewing machine itself is carried to the place of use, necessary accessories such as a parts storage box and a controller are also carried with it, making it convenient to carry and without fear of forgetting to carry them. Once the sewing machine is installed at the place of use, open the auxiliary bed device and take out the parts storage box, controls, etc. in the recess 8.

The opening operation of this auxiliary bed device is extremely simple, and it is sufficient to simply rotate the auxiliary support plate 4 to the open position. When the auxiliary support plate 14 is rotated to the open position, the first link 38 fixed thereto is rotated clockwise in FIG. 3, and the second link 39 is moved to the right. As a result, the shielding plate 27 is rotated clockwise against the elastic force of the torsion coil spring 48. In the first half of the encyclical operation of the auxiliary support plate 14, the leaf spring 52 is
, the leaf spring 52 acts in a direction that resists the rotational operation, but after the cam body 49 passes the point where the leaf spring 52 is operated the most, the rotational operation is reversed. It will act in a way that will help you. After the auxiliary support plate 14 is rotated to the open position where the rear surface 65 of the cam body 49 is in close contact with the upper surface of the leaf spring 52, it is stably held at this position, and is held in this position by the link mechanism 36. The connected shielding plate 27 is also stably held in the position shown by the two-dot chain line in FIG. Note that the torsion coil spring 48 acts in the direction against the rotational operation as described above until the first link 38 and the second link 39 are in a straight line as shown by the dashed line in FIG. , after passing the line state, it acts in the opposite direction to assist the rotation operation. In this way, the auxiliary support plate 14 and the shield plate 27 can be opened simultaneously by a one-touch operation, and are housed in the recess 8 in order to stably maintain the wide open state as shown in FIG. 2 even when the hand is released. The parts storage boxes, controllers, etc. that are stored can be taken out very easily.

After these are taken out, the bobbin case can be easily attached to and removed from the hook 61 located at the back of the recess 8, and the operation knob 64 can be operated easily. Close the auxiliary bed device when performing sewing work. The operation for closing the auxiliary bed device is also a one-touch operation of simply rotating the auxiliary support plate 14 downward.
At the beginning of this rotation operation, the leaf spring 52 and the torsion coil spring 48 act in a direction that resists the rotation operation, but in the latter half, both act in a direction that supports the rotation operation, and the auxiliary support plate 14 If it is rotated against the spring force, then the auxiliary support plate 14 and the shielding plate 27 will actively rotate. The rotated auxiliary support plate 14 is moved to the third position by the elastic force of the leaf spring 52.
As shown in the figure, the shielding plate 27 stops while being pressed against the stopper portion 23, and the shielding plate 27 stops while being pressed against the locking protrusion 35 of the auxiliary support plate 14 due to the elastic force of the torsion coil spring 48. The auxiliary support plate 14 and the shielding plate 27 are well closed together, giving a beautiful appearance, and preventing the shielding plate 27 etc. from resonating with the vibrations of the sewing machine and producing abnormal noise. The pin hole 45 for the stepped pin 42 that connects the two links 39 is an elongated hole as described above. This is to ensure that the cover is in close contact with the cover at the position.

That is, it is of course possible not to make the pin hole 45 a long hole, but in this case, the link mechanism 36, the auxiliary support plate 14, the shielding plate 27, etc. must be manufactured with high precision to prevent the auxiliary support plate 14 and the shielding. The plate 27 does not come into close contact with the cover at the cover position, and a good closing cannot be obtained.
5 is an elongated hole, since the manufacturing error can be absorbed by this hole, the manufacturing accuracy of the link mechanism 36 etc. can be made relatively low, and a good closing can be obtained while reducing the manufacturing cost. be. When the auxiliary support plate 14 and the shielding plate 27 are closed together, the recess 8, the hook 61 and the operation knob 64 disposed inside the recess 8 are completely covered, as shown in FIG. A good box-shaped bed appearance is created, and the recess 8 is used as an exhaust duct for hot air discharged from the sewing machine motor 58, which is extremely rational.

This embodiment has many features as detailed above, and is one of the preferred embodiments of the present invention, but the present invention is not limited thereto. For example, the link mechanism connecting the auxiliary support plate 14 and the shielding plate 27 is preferably a simple combination of the first link 38 and the second link 39, but various other mechanisms can be adopted. In other words, when the auxiliary support plate 14 is rotated between the cover position and the open position, the shield plate 27 is rotated in conjunction with the operation.
It is sufficient if the two can be connected so that they can be rotated between the upright position and the collapsed position.

Furthermore, the holding means for holding the auxiliary support plate 14 in the open position has a simple structure, and the combination of the leaf spring 52 and the cam body 49 prevents the auxiliary support plate 14 from vibrating in the covered position. Although this is preferable because of its effectiveness, it is of course also possible to use a conventional locking device such as a combination of a pin that rotates together with the auxiliary support plate 14 and a locking spring that elastically grips the pin at a predetermined position. It is.

Further, if the pin hole 45 of the link mechanism 36 is not made into an elongated hole, it is possible to have the same effect as the spring means 46 holding device 47, and conversely, it is also possible to omit the binding means 46. However, it is also possible to omit the spring means 46. Furthermore, if the auxiliary support plate 14 is held in the open position by hand to take out the parts storage box, etc., both the holding device 47 and the spring device 48 can be omitted. Further, if the cover position of the auxiliary support plate 14 is regulated by supporting the auxiliary support plate 14 at the upper end of the shielding plate 27, it is also possible to omit the stopper means such as the stopper portion 23.

In addition, it is also possible to arrange various operating parts in addition to the operating knob 64 for raising and lowering the feed dog in the recess 8. In this case, the appearance becomes simple and convenient for storage, and when carrying the sewing machine. It is possible to enjoy the advantage that there is no fear that these operating parts will be caught on surrounding objects and damaged.

Further, in the embodiment described above, the lower part of the bed section 6 of the sewing machine frame 1 is open and the open section is covered by the bottom plate section 7. It is also possible to use a cylindrical bed portion 6'.

However, if the bed part is cylindrical, it is recommended to provide an auxiliary partition wall 66 vertically rising from the bottom plate part 7 in order to prevent parts from entering between the bed part 6' and the bottom plate part 7. desirable. Further, in the above embodiment, since the recessed portion was provided in the front part of the bed portion 6, a unique effect was produced in that the bobbin case could be easily attached to and removed from the hook 61 by opening the recessed portion 8. The object of the present invention can also be achieved by providing a recess in the rear part of the bed part 6. In this case, an opening/closing lid similar to the follower button may be provided in the front part of the bed part 6.

Since the present invention is as described in detail above, it is possible to store not only a parts storage box but also a controller etc. inside the auxiliary bed device, and it is also possible to open the auxiliary bed device wide with an extremely simple one-touch operation. It becomes possible to easily take out or store the parts storage box from inside.

Also, after these are removed, there will be a large empty space that can be closed, so if you place various operation handles, knobs, dials, buttons, etc. inside this empty space, it will be easier to close the auxiliary bed device. In this state, these do not appear on the surface, giving a simple and good box-shaped bed appearance, and these operations can be performed extremely easily from the wide opening. In particular, when the auxiliary bed device is installed at the front of the bed, it has great value as an auxiliary bed that constitutes the workpiece support surface, and it also has a sufficiently large opening for attaching and detaching the bobbin case to and from the hook. An excellent effect is produced which is considerably easier to carry out through the process.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a sewing machine including an auxiliary bed device according to an embodiment of the present invention. FIG. 2 is a perspective view showing the auxiliary bed device in the sewing machine shown in FIG. 1 in an open state. FIG. 3 is a perspective view of FIG. 2. 1: Sewing machine frame, 2: Bracket arm, 3: Head, 4: Pillar section, 5: Base section, 6,
6': Bed section, 7: Bottom plate section, 8: Recess, 11: Front wall of bed section, 12: Left end wall of base section, 13: Edge trimming section,
14: Auxiliary support plate, 27: Shielding plate, 36: Link mechanism,
38: first link, 39: second link, 46: spring means, 47: holding means, 48: torsion coil spring, 49: cam body, 52: leaf spring. Figure 1 Figure N Ship Figure 3

Claims (1)

[Scope of Claims] 1. A base part that supports a bracket arm, a bed part that extends horizontally from the base part and whose upper surface constitutes a main workpiece support surface, and a base part that is connected to the base part with the bed part in between. a sewing machine frame including opposing end wall portions and a bottom plate portion located below the base portion and the bed portion;
In a sewing machine in which a recess defined by the front side wall or rear side wall of the bed part, one end wall of the base part adjacent to the side wall, the end wall part and the bottom plate part is formed, the upper part of the recess is It is rotatably attached to the sewing machine frame so that it can take a cover position to cover and an open position to open the cover, and in the cover position, the upper surface constitutes an auxiliary workpiece support surface that is substantially continuous with the main workpiece support surface. The auxiliary support plate is rotatably attached to the sewing machine frame so as to be able to take an upright position covering the front or rear of the recess and a down position opening it, and in the upright position, the outer surface thereof is attached to the outer surface of the base portion. a shielding plate that is substantially continuous with the shielding plate, and operatively connects the shielding plate and the auxiliary support plate, and when the auxiliary support plate is rotated between the cover position and the open position, the operation is interlocked with the rotation operation. and a link mechanism for rotating the shield plate between the upright position and the collapsed position, and the recess is opened and closed by rotating the auxiliary support plate. Auxiliary bed device. 2. The link mechanism includes a first link that rotates integrally with the auxiliary support plate, one end of which is pivotally connected to the shielding plate, and the other end of which is rotatably connected to the first link. An auxiliary bed device according to claim 1, comprising a second link. 3. A base part that supports the bracket arm, a bed part that extends horizontally from the base part and whose upper surface constitutes the main workpiece support surface, and an end wall part that faces the base part with the bed part in between; It has a sewing machine frame consisting of the base part and a bottom plate part located below the bed part, the front side wall or rear side wall of the bed part, one end wall of the base part adjacent to the side wall, the end wall part and In a sewing machine in which a recess defined by a bottom plate is formed, the cover is rotatably attached to the sewing machine frame so as to be able to take a cover position that covers the upper part of the recess and an open position that opens the recess. an auxiliary support plate constituting an auxiliary workpiece support surface whose upper surface is substantially continuous with the main workpiece support surface at a position;
a shield that is rotatably attached to the sewing machine frame so as to be able to assume an upright position that covers the front or rear of the recess and a down position that opens the recess, and whose outer surface is substantially continuous with the outer surface of the base portion in the upright position; A plate, the shielding plate, and the auxiliary support plate are operatively connected, and when the auxiliary support plate is rotated between the cover position and the open position, the shielding plate is rotated in conjunction with the operation. a link mechanism for rotating the shield plate between an upright position and a collapsed position; a spring means for biasing the shielding plate from its collapsed position toward an upright position; holding means for holding the auxiliary support plate in the open position, the recess is opened and closed by rotational operation of the auxiliary support plate, and the auxiliary support plate and the shielding plate are An auxiliary bed device characterized by being stably held in each position. 4. The auxiliary device according to claim 3, wherein the holding means comprises a cam body fixed to the auxiliary support plate, and a leaf spring fixed to the sewing machine frame and engaged with the cam body. Bed device. 5. The link mechanism includes a first link that rotates integrally with the auxiliary support plate, one end of which is pivotally connected to the shielding plate, and the other end of which is rotatably connected to the first link. and a second link, and when the auxiliary support plate is rotated from the cover position to the open position, both links correspondingly move from the first position to the second position, and the second link moves from the first position to the second position. 5. The auxiliary bed device according to claim 3, wherein there is a position intermediate between the first and second positions where both links are substantially in line.