JP4272746B2 - sewing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sewing machine, and more particularly to a sewing machine that is rotatably supported with respect to a box-shaped bottom cover.
[0002]
[Prior art]
5 and 6 are diagrams showing a configuration example of a conventional sewing machine, FIG. 5 is a front view showing a state when the sewing machine is operating, and FIG. 6 is a state in which the sewing machine body is tilted in order to bring out the bottom part 6c of the sewing machine body part. FIG.
[0003]
In these figures, a rotating shaft 4 is disposed on the rear end 2a side of the box-shaped bottom cover 2 that opens upward, and a sewing machine body 6 is supported so as to be rotatable about the rotating shaft 4. The rotary shaft 4 is provided below the lower end edge 6b of the rear end portion 6a of the sewing machine body 6. A needle bar 8 is provided on the sewing machine body 6 so as to be movable up and down. A needle 10 is detachably attached to the needle bar 8 with a screw or the like (not shown).
[0004]
The feed base 12 can be moved in an arbitrary direction so as to be able to sew a predetermined shape, and is attached to the sewing machine body 6 so as to be movable at almost right angles to the needle 10 of the sewing machine body 6.
The bottom cover 2 is fixed to the sewing machine table 14 with screws or the like (not shown).
[0005]
In the normal state where the sewing machine main body 6 can be operated, the opening 16 of the bottom cover 2 is closed so as to be horizontal with respect to the sewing machine table 14 as shown in the figure, and the bottom 6c of the sewing machine main body 6 is closed during maintenance or the like. When it is rotated around the rotary shaft 4 for exposure, the state shown in FIG. 2 is obtained, and the opening 16 of the bottom cover 2 is opened.
[0006]
Reference numeral 18 denotes a stopper mechanism. When the sewing machine body 6 is rotated to expose the bottom 6c, the sewing machine body 6 is maintained at a predetermined angle by the stopper mechanism 18.
[0007]
[Problems to be solved by the invention]
In the above-described conventional sewing machine, since the rotary shaft 4 is provided below the lower end edge 6b of the rear end portion 6a of the sewing machine body 6, the sewing machine body 6 so as to open the opening 16 of the bottom cover 2. , The movement locus 7 drawn by the lower end edge 6b of the rear end 6a of the sewing machine body 6 is drawn outside the bottom cover 2 as shown in FIG. That is, the lower end edge 6 b of the rear end portion 6 a of the sewing machine body 6 moves outside the bottom cover 2. Accordingly, in order to move the lower end edge 6b of the rear end portion 6a of the sewing machine body 6 along the locus 7, it is necessary to provide the notch portion 3 in the bottom cover 2. For this reason, the gap 15 is formed between the sewing machine body 6 and the bottom cover 2.
[0008]
Further, as apparent from the movement locus 7, when the sewing machine body 6 rotates so as to open the opening 16 of the bottom cover 2, the lower end edge 6 b of the rear end part 6 a of the sewing machine body 6 is in contact with the bottom cover 2. It moves to approach the upper edge of the rear end 2a.
[0009]
Accordingly, the exterior cover 20 is attached to the bottom cover 2 so as to be rotatable by the hinge 22 so that an object such as a sewing product or an operator's hand does not enter the gap 15 from the A direction. There is also an example in which the exterior cover 20 can be attached to and detached from the bottom cover 2 by screws, springs, magnets or the like instead of the hinge 22.
[0010]
Conventionally, in a sewing machine, when the sewing machine body 6 is rotated with respect to the bottom cover 2 around the rotation shaft 4 so that the opening 16 is opened, the exterior cover 20 that normally covers the gap 15 is As shown in FIG. 6, the sewing machine body 6 is moved from a position covering the gap 15 by being rotated by the hinge 22 so as not to obstruct the opening of the sewing machine body 6. When the exterior cover 20 is detachable from the bottom cover 2 by screws, springs, magnets, or the like, it has been removed.
[0011]
However, when opening and closing the sewing machine main body 6 for maintenance work or the like, the operator mostly performs the work from the direction B, and the exterior cover 20 is returned to the original state as shown in FIG. Even if not, there is no problem in terms of functionality such as sewing work, and therefore the exterior cover 20 is often left in the state shown in FIG. 6 or removed.
[0012]
For this reason, the original function of the exterior cover 20, that is, the function of protecting the machine and ensuring the safety of preventing the entry of an object from the outside or the entry of the operator's hand, has been fulfilled. In particular, there was a problem that the sewing product was broken or the machine was locked due to foreign matter intrusion.
[0013]
Accordingly, an object of the present invention is to provide a sewing machine that does not cause breakage of a sewn product caused by the above-described reason or mechanical lock due to entry of foreign matter.
[0014]
Another object of the present invention is to provide a sewing machine having a simple configuration that does not require an exterior cover for covering the gap formed between the sewing machine main body and the bottom cover.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1
A box-shaped bottom cover that opens upward;
A sewing machine body supported so as to be rotatable about a horizontal axis with respect to the bottom cover so as to open and close the opening of the bottom cover;
A stopper plate (24) whose one end is rotatably attached to the sewing machine body about the shaft (26);
An L-shaped groove (24b) formed on the stopper plate and having a lock position (24d) below;
A guide pin (28) fixed to the bottom cover and disposed in the L-shaped groove;
A spring (32) for urging the stopper plate in one direction, and when the sewing machine body is rotated by a predetermined angle, the guide pin enters the lock position of the L-shaped groove, and the state of the sewing machine body In a sewing machine where
Protruding portions projecting upward from the upper end edges of both end portions of the bottom cover are formed, and the rotation axis of the sewing machine body is disposed on the projecting portions,
The rotational axis of the sewing machine body is
When the sewing machine main body is rotated so as to open the opening, the movement locus of the lower end edge of the sewing machine main body rear end is arranged so as to be drawn inside the bottom cover.
The sewing machine according to claim 2 is provided in addition to the invention according to claim 1,
The rotation axis is arranged above the lower end edge of the rear end of the sewing machine.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
FIG. 1 and FIG. 2 are front views of the sewing machine according to the embodiment of the present invention, with a part of the bottom cover cut away, and FIG. 1 is a diagram during operation of the sewing machine (when the opening of the bottom cover is closed). 2 shows a state in which the sewing machine main body is tilted to expose the bottom of the sewing machine main body (a state in which the opening of the bottom cover is opened). 3 is a view similar to FIG. 2 showing the bottom cover without being cut away, and FIG. 4 is a side view showing only the bottom cover of FIG.
[0020]
In these drawings, a rotary shaft 104 is disposed on a box-shaped bottom cover 102 that opens upward, and a sewing machine body 106 is supported so as to be rotatable about the rotary shaft 104. A needle bar 8 is provided on the sewing machine body 106 so as to be movable up and down. A needle 10 is detachably attached to the needle bar 8 with a screw or the like (not shown).
[0021]
As shown in FIG. 4, the bottom cover 102 is formed with protrusions 108a and 109a that protrude upward from the upper end edges of the side end portions 108 and 109, respectively, and the rotating shaft 104 is disposed on the protrusions 108a and 109a. Has been. The rotating shaft 104 is attached to the rear end portion 106 a of the sewing machine body 106 so as to be positioned above the lower end edge 106 b of the sewing machine body 106.
[0022]
The feed base 12 can be moved in an arbitrary direction so that a predetermined shape can be sewn, and is attached to the sewing machine main body 106 so as to be movable substantially perpendicular to the needle 10 of the sewing machine main body 106.
The bottom cover 102 is fixed to the sewing machine table 14 with screws or the like (not shown).
[0023]
As shown in the figure, the sewing machine main body 106 is horizontal with respect to the sewing machine table 14 and closes the opening 16 of the bottom cover 102 to expose the bottom 106c of the sewing machine main body 106 during maintenance or the like. In order to achieve this, when it is rotated around the rotation shaft 104, the state shown in FIG. 2 is obtained, and the opening 16 of the bottom cover 102 is opened.
[0024]
Reference numeral 18 denotes a stopper mechanism, which includes a stopper plate 24 having one end rotatably attached to the sewing machine body 106 about the shaft 26. On the other end of the stopper plate 24, a spring retaining pin 24a is fixed and an L-shaped groove 24b is formed, and an operation portion 24c is fixed near the center. A guide pin 28 and a spring retaining pin 30 are fixed to the bottom cover 102. A spring 32 is provided between the spring retaining pin 24a of the stopper plate 24 and the spring retaining pin 30 of the bottom cover 102 to urge the stopper plate 24 to the right in the drawing.
[0025]
As shown in FIG. 3, the bottom cover 102 has a window 34 opened at a position where the operator can operate the operation portion 24 c of the stopper plate 24 while the sewing machine body 106 is tilted and the bottom portion 106 c is exposed. Has been. As shown in FIG. 1, when the sewing machine body 106 is horizontal and the opening 16 of the bottom cover 102 is closed, the guide pin 28 of the bottom cover 102 is positioned near the right end in the L-shaped groove 24 b of the stopper plate 24. Yes. When the sewing machine body 106 is rotated, as the inclination increases, the stopper plate 24 connected to the sewing machine body 106 rotates counterclockwise about the shaft 26 and the left end side thereof is moved rightward by the action of the spring 32. Moving.
[0026]
The guide pin 28 fitted in the L-shaped groove 24b of the stopper plate 24 is fixed to the bottom cover 102. However, as a result of the left end side of the stopper plate 24 moving to the right, the L-shaped groove is relatively fixed. As a result, the stopper plate 24 and the sewing machine main body 106 are prevented from moving, as a result of being moved to the left side of 24b and finally entering the most advanced locking position 24d and being maintained by the elastic force of the spring 32, It functions as a stopper, and the sewing machine body 106 is maintained at a predetermined angle.
[0027]
In order to return the sewing machine body 106 to the original state from the state shown in FIG. 2 or FIG. 3 and close the opening 16 of the bottom cover 102, the operating portion 24c is operated to resist the elastic force of the spring 32. The stopper plate 24 is rotated counterclockwise about the shaft 26 to remove the guide pin 28 from the lock position 24d of the L-shaped groove 24b, thereby enabling the sewing machine body 106 to be rotated counterclockwise and then in the same direction. Rotate to
[0028]
In the sewing machine according to the above-described embodiment, when the sewing machine body 106 rotates so as to open the opening 16 of the bottom cover 102, the lower end edge 106b of the rear end part of the sewing machine body 106 is traced as shown in FIG. Move along 107. The trajectory 107 is drawn inside the bottom cover 102. For this reason, unlike the conventional sewing machine, it is not necessary to provide a notch in the bottom cover 102 in order to allow the lower end edge 106b of the rear end portion 106a of the sewing machine body 106 to move along the trajectory 107. Accordingly, there is no gap between the sewing machine main body 106 and the bottom cover 102, so that it is not necessary to provide a conventional exterior cover. Therefore, the configuration of the sewing machine is simplified. Further, there is no danger that the operator is damaged or objects such as sewing products are dragged by the movement of the lower end edge 106b of the rear end portion 106a of the sewing machine body 106.
[0029]
Further, as is clear from the locus 107, when the sewing machine body 106 rotates so as to open the opening 16 of the bottom cover 102, the lower end edge 106b of the rear end part 106a of the sewing machine body 106 is It moves away from the upper edge of the rear end 102a. Therefore, there is no danger that the operator will be injured by the movement of the lower end edge 106b of the rear end portion 106a of the sewing machine body 106 or an object such as a sewing product will be dragged. Further, since it is not necessary to provide a conventional exterior cover, the configuration of the sewing machine is simplified.
[0030]
【The invention's effect】
According to the present invention, when the sewing machine main body is rotated so that the rotation axis of the sewing machine main body opens the opening of the bottom cover, the movement locus of the lower end edge of the sewing machine main body rear end is drawn inside the bottom cover. Therefore, no gap is generated between the sewing machine main body and the bottom cover. Therefore, it is not necessary to provide an exterior cover so that an object such as a sewing product or an operator's hand does not enter as in the conventional case, and the configuration of the sewing machine becomes simple. Further, there is no danger that the operator will be damaged or objects such as sewing products will be dragged by the movement of the lower end edge of the rear end of the sewing machine body.
[Brief description of the drawings]
FIG. 1 is a front view illustrating a state in which a part of a bottom cover is cut away in a state during operation of a sewing machine according to an embodiment of the present invention.
2 is a front view showing a state in which the bottom of the sewing machine main body is exposed by tilting the sewing machine main body of FIG. 1; FIG.
3 is a view similar to FIG. 1 showing the bottom cover without being cut away. FIG.
4 is a side view showing only the bottom cover of FIG. 1; FIG.
FIG. 5 is a front view showing a state of a conventional sewing machine during operation.
FIG. 6 is a front view showing a state in which a sewing machine body of a conventional sewing machine is tilted.
[Explanation of symbols]
2 Bottom cover 2a Bottom end of bottom cover 3 Notch 4 Rotating shaft 6 Sewing machine body 6a Rear end 6b Bottom edge 6c Bottom 7 Movement locus 8 Needle bar 10 Needle 12 Feeding base 14 Sewing table 15 Gap 16 Opening 18 Stopper mechanism 20 Exterior cover 22 Hinge 24 Stopper plate 24a Spring stop pin 24b Shaped groove 24c Operation part 24d Lock position 26 Shaft 28 Guide pin 30 Spring stop pin 32 Spring 34 Window part 102 Bottom cover 102a Rear end 104 Rotating shaft 106 Sewing machine body 106a Rear end 106b Bottom edge 106c Bottom 107 Movement trajectory 108, 109 Side edge 108a, 109a of the bottom cover Projection

Claims (2)

A box-shaped bottom cover that opens upward;
A sewing machine body supported so as to be rotatable about a horizontal axis with respect to the bottom cover so as to open and close the opening of the bottom cover;
A stopper plate (24) whose one end is rotatably attached to the sewing machine body about the shaft (26);
An L-shaped groove (24b) formed on the stopper plate and having a lock position (24d) below;
A guide pin (28) fixed to the bottom cover and disposed in the L-shaped groove;
A spring (32) for urging the stopper plate in one direction, and when the sewing machine body is rotated by a predetermined angle, the guide pin enters the lock position of the L-shaped groove, and the state of the sewing machine body In a sewing machine where
Protruding portions projecting upward from the upper end edges of both end portions of the bottom cover are formed, and the rotation axis of the sewing machine body is disposed on the projecting portions,
The rotational axis of the sewing machine body is
When the sewing machine main body is rotated so as to open the opening, the movement trajectory of the lower end edge of the sewing machine main body rear end is arranged so as to be drawn inside the bottom cover. sewing machine. The sewing machine according to claim 1, wherein
The sewing machine characterized in that the rotation axis is disposed above a lower end edge of a rear end portion of the sewing machine.

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