Sewing – Special machines – Embroidering
Reexamination Certificate
2000-03-29
2001-08-28
Nerbun, Peter (Department: 3741)
Sewing
Special machines
Embroidering
Reexamination Certificate
active
06279498
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a headgear frame apparatus of a sewing machine for embroidering a headgear.
2. Description of the Related Art
As shown in
FIG. 6
, a conventional headgear frame apparatus
105
is provided with a cylindrical rotary drive frame
106
for turning a headgear
1
in front of a sewing machine frame in the circumferential direction of the circumferential portion
5
of the headgear
1
, and a headgear frame
100
detachably attached to the rotary drive frame
106
.
On the outer circumference of the rotary drive frame
106
, there are disposed three holding rollers
107
which are equidistantly spaced in the circumferential direction for fixing the headgear frame
100
. These holding rollers
107
are biased by (not-shown) springs to hold the outer circumference of the rotary drive frame
106
.
A receiving frame
101
of the headgear frame
100
is provided with three engaging holes
108
corresponding to the individual holding rollers
107
. When this headgear frame
100
is to be attached to the rotary drive frame
106
, its receiving frame
101
is fitted and forced on the rotary drive frame
106
. Then, the individual holding rollers
107
come into engagement with the engaging holes
108
so that the headgear frame
100
is fixed. When the headgear frame
100
is detached, on the other hand, it is forcibly pulled from the rotary drive frame
106
. Then, the individual holding rollers
107
are disengaged from the engaging holes
108
.
Here, in order to fixing the headgear frame
100
on the rotary drive frame
106
without any chatter, it is necessary to intensify the pushing forces of the holding rollers
107
. Then, the headgear frame
100
has to be pushed or pulled by accordingly strong forces for bringing the holding rollers
107
into or out of engagement with the engaging holes
108
when the headgear frame
100
is to be attached or detached. This makes these attaching and detaching works difficult for the powerless worker.
When the headgear frame
100
is to be removed, on the other hand, the strong pulling force is required till the holding rollers
107
and the engaging holes
108
come out of engagement. After this disengagement, however, the receiving frame
101
of the headgear frame
100
is just fitted on the rotary drive frame
106
so that the headgear frame
100
can be easily removed by a weak force. If the headgear frame
100
is pulled extensively strongly, therefore, the holding rollers
107
and the engaging holes
108
are disengaged, but simultaneously with this, the headgear frame
100
may entirely come out from the rotary drive frame
106
. This makes it difficult to moderate the force for pulling the headgear frame
100
.
In order to ensure the attachment of the headgear frame
100
, moreover, the engagement between the holding rollers
107
and the engaging holes
108
has to be visually confirmed, and this confirmation is troublesome.
Thus, it is not efficient to attach and detach the headgear frame
100
to and from the rotary drive frame
106
which is disposed on the sewing machine side.
SUMMARY OF THE INVENTION
An object of the invention is to provide a headgear frame apparatus which facilitates attachment and detachment of a headgear frame to and from a rotary drive frame.
In the invention, therefore, there are taken the following means, as will be individually described with reference to
FIGS. 1
to
5
.
According to an aspect of the invention, there is provided a headgear frame apparatus
9
comprising: a headgear frame
10
for clamping a headgear
1
; and a rotary drive frame
30
for fitting said headgear frame
10
replaceably thereon on the side of a sewing machine (e.g., an embroidering machine), characterized:
in that the headgear frame
10
is provided at its outer circumference with a brim
23
which is further projected outward;
in that on the outer circumference of the rotary drive frame
30
, there are tiltably hinged at axes
33
levers
32
which have hook pawls
31
projected toward the rotary drive frame
30
and which are biased by springs
34
in the direction where the hook pawls
31
approach the rotary drive frame
30
; and
in that when the headgear frame
10
is fitted on the rotary drive frame
30
, the brim
23
once raises the hook pawls
31
in the direction away from the rotary drive frame
30
, and thereafter the hook pawls
31
ride over the brim
23
, the hook pawls
31
being hooked on the brim
23
by the biasing forces of the springs
34
.
In the shown embodiment, the aforementioned members
23
,
31
,
32
,
33
and
34
are provided transversely symmetrically at the headgear frame
10
and the rotary drive frame
30
.
The headgear
1
includes a cap, a hat, a beret and any others which can be embroidered and worn on the head.
As in the shown embodiment, it is preferable that the rotary drive frame
30
is provided with abutting projections
35
which come, just before the levers
32
abut against the brim
23
when the hook pawls
31
are hooked on the brim
23
, into abutment against said levers
32
to generate abutting sounds and to stop said levers
32
.
As in the shown embodiment, it is preferable that the rotary drive frame
30
is provided with spring plungers
36
for pushing the brim
23
in the direction to release the headgear frame
10
from the rotary drive frame
30
when the levers
32
are tilted to unhook the hook pawls
31
from the brim
23
.
As in the shown embodiment, it is preferable that the spring plungers
36
push the brim
23
so that the headgear frame
10
may stop when the hook pawls
31
ride over the outer periphery
23
a
of the brim
23
.
In this headgear frame apparatus
9
, the headgear frame
10
is attached to the rotary drive frame
30
in the following manner:
The headgear frame
10
with the headgear
1
is fitted on (the outer circumference) of the rotary drive frame
30
disposed on the sewing machine side;
As the headgear frame
10
is inserted deeply, the brim
23
once raises the hook pawls
31
in the direction away from the rotary drive frame
30
. After the hook pawls
31
ride over the brim
23
, the hook pawls
31
are hooked on the brim
23
by the biasing forces of the springs
34
; and
Just before the levers
32
abut against the brim
23
when the hook pawls
31
are hooked on the brim
23
, the abutting projections
35
abut against the levers
32
to generate the abutting sounds (such as clicks), and the hooking can be confirmed.
On the other hand, the headgear frame
10
is removed from the rotary drive frame
30
in the following manner:
While holding the headgear frame
10
between the two hands, the levers
32
are tilted by pushing the action ends
32
a
of the left and-right levers
32
with the hand fingers;
When the hook pawls
31
at the leading ends of the levers
32
are unhooked from the brim
23
, the spring plungers
36
push the brim
23
in the direction to release the headgear frame
10
from the rotary drive frame
30
of the headgear frame
10
, and then they stop the headgear frame
10
when the hook pawls
31
ride over the outer periphery
23
a
of the brim
23
; and
At this stage, the levers
32
need not be continuously pushed any more but can be easily removed from the rotary drive frame
30
merely by pulling the headgear frame
10
lightly.
The following effects can be achieved according to this headgear frame apparatus
9
:
The headgear frame
10
can be attached or detached by the single action;
The hook pawls
31
are hooked on the brim
23
which is further projected outward from the outer circumference of the headgear frame
10
so that the leading ends of the hook pawls
31
do not probably pierce through the inner circumference of the headgear frame
10
;
The brim
23
to be hooked by the hook pawls
31
can be made so sufficiently thick that it can be prevented from being miss-hooked due to wear; and
Further objects of this invention will become evident upon an understanding of the illustrative embodiments described below. Vari
Hattori Osamu
Ozeki Masahiko
Kabushiki Kaisha Barudan
Nerbun Peter
Pillsbury & Winthrop LLP
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