JPS6022930Y2 - Auxiliary floor mounting device for free arm sewing machines - Google Patents

Description

[Detailed description of the invention] (Technical field) The present invention relates to an auxiliary floor mounting device for a free arm sewing machine that is provided with a cylindrical bed section, a so-called free arm section. is pivotally mounted, and the base is stably held in two positions with respect to the free arm part by the positioning means, thereby adapting to the bed form adapted to the border of a flat border, that is, the flat bed form and the border of a cylindrical seam. The present invention relates to an auxiliary floor mounting device for a free-arm sewing machine that can be switched to an appropriate bed configuration, that is, a free-arm configuration.

(Prior Art) A free-arm sewing machine or a free-arm sewing machine that can be switched to a flatbed state by cooperation with an auxiliary bed (hereinafter, these free-arm sewing machines are referred to as "free-arm sewing machines").

), as shown in FIG. 1, a gap C is generally provided between the free arm section 1 and the base 2 for passing the cloth when in the free arm configuration, and the space C is provided between the free arm section 1 and the base 2 to allow the cloth to pass through the sewing machine mounting surface, e.g. The height from the work table surface S to the sewing machine work surface, that is, the top surface 1a of the free arm portion 1, is hereinafter referred to as the "working height of the sewing machine."

) becomes Hl, and this amount is the minimum required for this type of sewing machine.

Reference numeral 3 denotes an auxiliary bed, and when the auxiliary bed is attached to the sewing machine as a flat bed as shown in the figure, its top surface 3a is on the same plane as the top surface 1a of the free arm portion 1, and forms part of the sewing machine work surface. However, it must be removed when in free arm form.

When performing sewing work with a sewing machine placed on the work table surface S, the lower the working height of the sewing machine, the smoother the work can be, and the less fatigue caused by the sewing machine work.

That is, the height of the work table surface S is generally set or standardized to be optimal for placing objects there and working there.

Therefore, if the working height of the sewing machine is raised above the working table surface S, the height of the sewing machine working surface will deviate from the optimum value accordingly.

Figure 2 shows an example in which the lower part of the free arm part 1 is removed from the base 4. According to this example, the working height H2 of the sewing machine is lower than in the case of Figure 1, but due to its structure, the free arm part 1 is removed. Since it is not possible to provide a support leg below the tip of the section 1, and the stability of the sewing machine deteriorates in both the free arm and flatbed configurations, it is necessary to provide an auxiliary leg 5 at a projecting position in front of the sewing machine.

Reference numeral 6 denotes an auxiliary floor, which has the same function as the one 3 in FIG.

As mentioned above, in conventional free arm sewing machines,
The minimum working height of the sewing machine is the sum of the thickness of the free arm and the gap between the free arm and the work table surface in the free arm mode to allow the fabric to pass through. However, in sewing operations using free-arm sewing machines, the flatbed mode is used most of the time, and the free-arm mode is rarely used.

Therefore, when performing seam allowance work on a free-arm sewing machine, it is necessary to place emphasis on workability in the flatbed configuration.

However, in the conventional example described above, even in the flatbed configuration, there is a gap below the free arm that is required when switching to the free arm configuration, so the working height of the sewing machine and the overall height of the sewing machine are This increases the height of the sewing machine, and the flatbed design has poor workability, making it difficult to perform smooth sewing operations, and the overall height of the sewing machine increases, which requires a large amount of storage space.

(Purpose) The present invention has been devised to eliminate the above-mentioned drawbacks of the conventional sewing machine. By stably holding the part in two positions, it is possible to easily switch between the flat bed form and the free arm form.In the frequently used flat bed form, the work table surface and the bottom of the free arm are To provide a compact free arm sewing machine which eliminates gaps and lowers the working height of the sewing machine, enables smooth work with the sewing machine, and reduces the overall height of the sewing machine.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 10 denotes a sewing machine body, and the main body includes a base 11 as an upright part, and an upper arm that can horizontally protrude forward from the upper and lower parts of the base. 12 and a free arm portion 13 which is a lower arm.

Reference numeral 14 denotes an L-shaped base consisting of a base 14a and a horizontal piece 14b that is perpendicular to the base and narrower than the base. It is pivoted by a pivot 17.

lla is a groove formed in the base 11 of the sewing machine main body 1o so as not to impede the swinging motion of the leg portion 15 at the front of the base 14.

The rear legs [6] of the base 14 are exposed outside the base 11.

When the base 14 is in the upright position as shown in FIGS. It is arranged so that it is on the same plane as the

Further, the horizontal piece 14b of the base 14 is arranged with a constant gap from the side of the free arm portion 13.

When the base 14 is in the laid down position as shown in FIGS. 4 and 6, the base 14a is located below the base 11,
are arranged below the free arm part 13, and the base 11 and the leg part 16 are provided with shaped holes 1, respectively.
By inserting fixing pins 18 into 1b and 16a, the base 14 is stably maintained in its laid down position.

Reference numeral 19 denotes an anti-slip piece made of a rubber material or the like having a high coefficient of friction, which is attached to the base 14.

20 is an auxiliary floor pivotally connected to the horizontal piece 14b of the base 14;
When the base 14 is in the upright position as shown in FIG. 3 and FIG. The top surface 20b of the auxiliary floor 20 is set to be continuous with and on the same plane as the top surface 13b of the free arm portion 13.

When the base 14 is in the laid down position as shown in FIGS. 4 and 6, the bottom surface of the auxiliary floor 20 is
It is arranged so that it is on the same plane as the bottom surface of.

(Effects) The present invention is constructed as described above, and as shown in Figures 3 and 5.
When the base 14 is in the upright position as shown in the figure, the sewing machine is in a flatbed configuration, and the lower end surface of the base 14 and the bottom surface of the free arm section 13 are disposed on the same plane, and the lower end surface of the free arm section 13 is located below the free arm section 13. Since there is no gap between the sewing machine and the work table surface S, the working height of the sewing machine can be minimized.

Since this configuration is stably held by the weight of the sewing machine main body 10 applied to the base 14, there is no risk of the sewing machine shaking during operation.

Further, when the base 14 is in the laid down position as shown in FIGS. 4 and 6, the sewing machine is in a free arm configuration, and in this configuration, the fixing pin 18, which is a positioning means, is attached to the sewing machine main body 10.
The holes 11b, 1 in the base 11 and the legs 16 of the base 14
It is stably held by inserting it into 6a.

Since the base 14 is formed in an L-shape, the stability of the sewing machine is good.

As described above, according to the present invention, the auxiliary bed is pivotally connected to the base of the sewing machine body, and the positioning means stably holds the base in the two-state position with respect to the sewing machine body. The sewing machine can be easily switched between the flatbed mode and the free arm mode, and in the frequently used flatbed mode, the gap between the work table surface and the lower part of the free arm is eliminated, and the working height of the sewing machine is lowered. The present invention provides an auxiliary floor mounting device for a free arm sewing machine which enables smooth operation of the sewing machine and which has a compact and low overall height, and its effects are remarkable.

[Brief explanation of drawings]

Figure 1 is a side view of a conventional free arm sewing machine, Figure 2 is a side view of a conventional free arm sewing machine different from Figure 1, and Figures 3 to 6 are a side view of a conventional free arm sewing machine. 3 is a perspective view showing a flat bed configuration of the sewing machine, FIG. 4 is a perspective view showing a free arm configuration of the sewing machine, FIG. 5 is a side view of FIG. 3, and FIG. FIG. 5 is a side view of FIG. 4; In the figure, 11 is a base, 12 is an upper arm, 13 is a free arm portion, 13b is the top surface, 14 is a base, 18 is a fixing pin as a positioning means, 20 is an auxiliary floor, and 20b is the top surface.

Claims (1)

[Scope of utility model registration request] In a free arm sewing machine comprising a base 11, an upper arm 12 and a free arm part 13 that can protrude horizontally from the upper and lower parts of the base, the free arm part 13 is pivoted to the base 11 and is in an upright position. It is arranged with a certain gap from the side, and is arranged with a certain gap from the bottom of the base 11 and the free arm part 13 in the laid down position so that the lower end surface is on the same plane as the bottom surface of the free arm part 13. a base 14, and a positioning means 1 for stably maintaining the position of the base in the laid down position.
8, which is pivotally connected to the base 14 so that when the base is in the upright position, the top surface 20b is the top surface 13 of the free arm portion 13.
An auxiliary bed mounting device for a free arm sewing machine, which is provided with a compensating bed 20 set to be on the same plane as b.