JPH0542276A - sewing machine - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a low-cost fall prevention device that can prevent the attachment for embroidery sewing that is detachably attached to the sewing machine bed from falling off while the sewing machine is being carried. [Structure] One end of a lock member 20 formed of an elastic plate is fixed to the lower surface of an attachment 1 for embroidery sewing, a locking claw portion 20a is formed at the tip thereof, and a protrusion 2 is formed at an intermediate portion.
0b is formed. When the attachment is placed on the desk, the lock member 2 resists elasticity through the protrusion 20b.
When the sewing machine is lifted with this attachment attached, the lock member 20 is lowered by elasticity and the locking claw portion 20a at the front end of the sewing machine body 2 is lifted. Locked claw portion 23a
To prevent the attachment from falling off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine in which an attachment is detachably attached to a sewing machine main body.

[0002]

2. Description of the Related Art Some of recent desk-top sewing machines are designed to be able to perform embroidery sewing by attaching a dedicated attachment for embroidery sewing to the main body of the sewing machine. This attachment for embroidery sewing has an embroidery frame for holding the cloth,
Since this embroidery frame is equipped with various parts such as an X-axis feed motor and a Y-axis feed motor for moving the embroidery frame in the X-axis direction and the Y-axis direction, it is very heavy. It is easy to break down.

Therefore, as described in the operating instructions in the instruction manual, when carrying the sewing machine body, the attachment for embroidery sewing must be removed from the sewing machine body in order to prevent the attachment for the embroidery sewing from coming off. It is supposed to be.

[0004]

However, some users do not perform the proper handling described in the instruction manual and sometimes accidentally lift the sewing machine body with the attachment for embroidery sewing attached. is there. In this case, even if the lifted sewing machine body is slightly inclined, the embroidery attachment may fall out of the sewing machine body due to its own weight, and may be damaged or broken due to the impact of the drop. Moreover, even if it falls on the user's foot, there is a risk of injury.

The present invention has been made in consideration of the above circumstances. Therefore, the object of the present invention is to prevent the attachment from falling off without fail even if the attachment is lifted while being attached to the sewing machine main body, and the attachment is damaged. -To provide a sewing machine capable of preventing failure and improving safety.

[0006]

A sewing machine according to the present invention is such that an attachment is removably attached to a sewing machine main body, and a lock member for locking the attachment to the sewing machine main body is provided, and the locking member is elastic. It is characterized in that it is made of a material and is held in a locked state by its elasticity.

[0007]

According to the above construction, the attachment is locked to the sewing machine main body by the lock member and the locked state is held by the elasticity of the locking member. Therefore, even if the attachment is carried on the sewing machine main body, the attachment is not There is no worry of falling out of the main body.

Moreover, since the lock member is made of an elastic material and is held in the locked state by its own elastic force, it is not necessary to provide a spring or the like to hold the locked state. As a result, the number of parts can be reduced and the assembling efficiency can be improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, a schematic configuration of the sewing machine main body 2 to which the embroidery sewing attachment 1 is attached will be described with reference to FIG. The sewing machine main body 2 is composed of a bed portion 3 and an arm portion 4 extending upward and leftward from a right end portion of the bed portion 3. A needle bar 6 having a sewing needle 5 is provided below the tip of the arm 4. The needle bar 6 is moved up and down by a driving force of a sewing machine motor (not shown) provided in the sewing machine main body 2.

A presser bar 7 is provided immediately behind the needle bar 6 in the lower part of the tip of the arm section 4 so as to switch the position between an upper position and a lower position. A cloth retainer 8 is detachably attached to the portion. Also,
A sewing machine handle 9 is provided on the upper surface of the arm portion 4, and the sewing machine main body 2 is carried by the sewing machine handle 9.

A cylindrical free arm bed 3a is provided on the bed portion 3 so as to project leftward, and a needle plate 10 is provided on the free arm bed 3a. For normal sewing, the free arm bed 3
Attach an auxiliary table (not shown) to a. And if this auxiliary table is removed, the free arm bed 3a
It is possible to sew through a bag or a cylinder, and when performing embroidery sewing, the attachment 1 for embroidery sewing is attached to the free arm bed 3a.

Next, a schematic structure of the attachment 1 for embroidery sewing will be described. The attachment 1 for embroidery sewing is
An embroidery frame 11 for holding a work cloth is provided on the needle plate 10. The embroidery frame 11 is horizontally movable by a horizontal movement mechanism 12. The horizontal movement mechanism 12 moves the X-axis direction moving body 13 in the X-axis direction (horizontal direction) by an X-axis feed motor (not shown) incorporated in the embroidery sewing attachment 1.
The Y-axis direction moving body 14 supporting the embroidery frame 11 is moved in the Y-axis direction (front-back direction) along the X-axis direction moving body 13 by a Y-axis feed motor (not shown) also incorporated therein.

When the embroidery sewing attachment 1 is attached to the free arm bed 3a, the bottom plate portion 15 of the embroidery sewing attachment 1 is attached to the free arm bed 3a.
The free arm bed 3a is inserted into the gap 17 between the lower surface of a and the bottom plate portion 16 of the sewing machine main body 2, and the free arm bed 3a is fitted into the recess 18 formed in the attachment 1 for embroidery sewing. In this state, the connector (not shown) on the right side surface of the attachment 1 for embroidery sewing is inserted into the connector 19 (see FIG. 5) on the left side surface of the bed 3,
As a result, the embroidery sewing attachment 1 and the sewing machine body 2 are also electrically connected.

On the other hand, a lock member 20 is attached to the lower surface of the bottom plate portion 15 of the attachment 1 for embroidery sewing. The lock member 20 automatically locks the embroidery sewing attachment 1 on the sewing machine body 2 as described later when the sewing machine body 2 is lifted while the embroidery sewing attachment 1 is mounted. The lock member 20 will be described in detail.

The lock member 20 is made of an elastic material, for example, a spring material, and the elasticity of the lock member 20 holds the lock state between the embroidery sewing attachment 1 and the sewing machine body 2. A screw insertion hole 21 (see FIGS. 6 and 7) is provided at the base end portion (the right end portion in the drawing) of the lock member 20, and the two tapping screws 22 inserted into the screw insertion hole 21 lock the lock member 20. The member 20 is fixed to the lower surface of the bottom plate portion 15 of the attachment 1 for embroidery sewing. A locking claw portion 20a is bent downward at the tip of the lock member 20.

Corresponding to the locking claw portion 20a of the lock member 20, a locked claw portion 23a is formed by bending upward on the reinforcing plate 23 in the bottom plate portion 16 of the sewing machine main body 2. Then, as shown in FIG. 3, when the sewing machine main body 2 is lifted together with the embroidery sewing attachment 1, the lock member 2
The locking claw portion 20a is automatically locked by the locked claw portion 23a of the reinforcing plate 23 due to the elasticity of 0 itself to be in the locked state.

Further, in the central portion of the lock member 20,
When a protrusion 20b protruding downward is formed and the attachment 1 for embroidery sewing is placed on the desk top surface 24, the protrusion 20b abuts the desk top surface 24 and resists the elasticity of the lock member 20 itself. The stop claw portion 20a is removed upward from the locked claw portion 23a so that the lock is released. An escape hole 25 is formed in a portion corresponding to the lock member 20 on the lower surface of the bottom plate portion 15 of the attachment 1 for embroidery sewing, and the lock member 20 is escaped in the unlock direction in the escape hole 25. ing.

Next, the operation of the above configuration will be described.
When performing embroidery sewing, first, after removing the auxiliary table from the free arm bed 3a of the sewing machine main body 2, as shown in FIG. 5, the embroidery sewing attachment 1 is temporarily placed on the left side of the free arm bed 3a. In this state,
Due to the weight of the attachment 1 for embroidery sewing, the lock member 20 is pushed upward against the elasticity of the lock member 20 in a state where the protrusion 20b of the attachment 20 is in contact with the desk top surface 24, and is held at the unlocked position. It

In this state, the attachment 1 for embroidery sewing
Is slid rightward along the desk top surface 24, and the bottom plate portion 15 of the attachment 1 for embroidery sewing is inserted into the gap 17 between the bottom surface of the free arm bed 3a and the bottom plate portion 16 of the sewing machine main body 2. Attach the attachment 1 for embroidery sewing to the free arm bed 3a. By this attachment, the recess 18 of the attachment 1 for embroidery sewing fits into the free arm bed 3a, and the connector (not shown) on the right side surface of the attachment 1 for embroidery sewing
Is inserted in the connector 19 on the left side surface of the bed 3. As a result, the attachment 1 for embroidery sewing
Is also electrically connected to the sewing machine main body 2, so that after that, it will function as an embroidery sewing machine.

In this state, the lock member 20 is shown in FIG.
As shown in FIG. 5, the protrusion 20b abuts the desk top surface 24, and the lock member 20 is held at the unlocked position. Therefore, the locking claw portion 20a of the lock member 20 is the locked claw of the reinforcing plate 23. It is in a state of being disengaged upward from the portion 23a (unlocked state). Therefore, when removing the embroidery sewing attachment 1 from the sewing machine main body 2, the embroidery sewing attachment 1 may be pulled out to the left as it is while sliding on the desk top surface 24.

Here, for example, when the user accidentally holds the sewing machine handle 9 while holding the attachment 1 for embroidery sewing on the sewing machine main body and lifts the sewing machine, the attachment 1 for embroidery sewing is displayed as shown in FIG. Since it moves away from the desk top surface 24, the force pushing the lock member 20 upward is released. As a result, the lock member 23 returns downward due to its elasticity, and the locking claw portion 20a thereof is reinforced.
Since the embroidery sewing attachment 1 is locked to the locked claw portion 3a of the sewing machine 3, the embroidery sewing attachment 1 is automatically locked to the sewing machine main body 2 and the embroidery sewing attachment 1 is reliably prevented from falling off. For this reason, damage and failure due to the drop of the embroidery sewing attachment 1 are prevented, and safety is also improved.

Moreover, the lock member 20 in the present embodiment.
Is designed to automatically lock the embroidery sewing attachment 1 on the sewing machine body 2 only when the sewing machine body 2 is lifted while the embroidery sewing attachment 1 is mounted, and these are placed on the desk top surface 24. In this state, the protrusion 20b of the lock member 20 is in contact with the desk top surface 24 to hold the lock member 20 in the unlocked position, so that the user need not operate the lock member 20 at all. The attachment / detachment work of the attachment 1 for embroidery sewing can be performed very easily with a so-called one-touch operation, and the usability is not impaired.

Further, since the lock member 20 is made of an elastic material and the elasticity thereof holds the locked state between the embroidery sewing attachment 1 and the sewing machine main body 2, a special spring or the like is provided to hold the locked state. Therefore, the number of parts can be reduced, the assembly efficiency can be improved, and the cost can be reduced.

In this embodiment, the lock member 20 is provided on the side of the attachment 1 for embroidery sewing, but conversely, the lock member 20 may be provided on the side of the sewing machine main body 2. In this case, a locking claw portion for locking the lock member may be provided on the side of the attachment 1 for embroidery sewing.

In addition, according to the present invention, various modifications can be made without departing from the spirit of the present invention, for example, the auxiliary table mounting structure may be provided with a lock member similar to that of this embodiment.

[0026]

As is apparent from the above description, the sewing machine of the present invention is provided with a lock member for locking the attachment to the sewing machine main body, and the lock member is formed of an elastic material, and the elasticity holds the locked state. Therefore, even if the attachment is lifted while being attached to the sewing machine body, the attachment can be reliably prevented from falling off the sewing machine body, and the attachment can be prevented from being damaged or broken and the safety can be improved.

Moreover, since the lock member is made of an elastic material and is held in the locked state by its own elastic force, it is not necessary to provide a spring or the like to hold the locked state. Therefore, it is possible to reduce the number of parts and improve the assembly efficiency.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional rear view of an essential part showing an embodiment of the present invention.

FIG. 2 is a partially cutaway rear view showing a state in which an attachment for embroidery sewing is attached to a sewing machine main body.

FIG. 3 is a view corresponding to FIG. 1 when the attachment for embroidery sewing is lifted while being attached to the sewing machine main body.

FIG. 4 is an overall perspective view of a sewing machine equipped with an attachment for embroidery sewing.

FIG. 5 is a partially cutaway perspective view showing a state before the embroidery sewing attachment is attached to the sewing machine main body.

FIG. 6 is a plan view of a lock member.

FIG. 7 is a rear view of the lock member.

[Explanation of symbols]

1 is an attachment for embroidery sewing (attachment), 2
Is a sewing machine main body, 3a is a free arm bed, 9 is a sewing machine handle, 11 is an embroidery frame, 12 is a horizontal movement mechanism, 19 is a connector, 20 is a locking member, 20a is a locking claw portion, 20
Reference numeral b is a protrusion, 23 is a reinforcing plate, 23a is a locked claw, and 24 is a desk top surface.

Claims (1)

[Claims] 1. A sewing machine in which an attachment is removably attached to a sewing machine main body, and a lock member for locking the attachment to the sewing machine main body is provided, and the lock member is formed of an elastic material and locked by the elasticity. A sewing machine characterized in that it retains its state.