Metal deforming – By use of non-deforming work-gripping clamp and relatively... – With cutting
Reexamination Certificate
1999-05-25
2001-05-08
Crane, Daniel C. (Department: 3725)
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
With cutting
C030S229000, C083S607000
Reexamination Certificate
active
06227026
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a band-blade cutting tool which is used for cutting a band blade that is a so-called Thomson blade, and also to a band-blade working apparatus having a function of cutting such a band blade into a predetermined shape and like functions.
2. Description of the Prior Art
As shown in
FIGS. 12A and 13
, a band blade
1
which is a so-called Thomson blade has an sharp blade portion
13
in one edge in the width direction of a strip-like ridge portion
12
. The band blade
1
is subjected to necessary workings and then used in, for example, formation of breaks or a fold in a paper piece, a paper sheet, a wood piece, or the like. In addition to working the band blade
1
to form it into a predetermined shape, workings which may be applied to the band blade
1
include: working of punching given portions of the ridge portion
12
of the band blade
1
into a rectangular shape to form bridges
14
in the ridge portion
12
as shown in
FIG. 12B
; and that of cutting away the bridges
14
as shown in FIG.
12
C. The cutting of the bridges
14
may be conducted by, for example, so-called miter cutting in which, as shown in the XIVa portion in FIG.
12
C and in
FIG. 14A
, the blade portion
13
is obliquely crossly cut so that one cut end
13
a
has the same inclination angle &thgr;
2
as the inclination angle &thgr;
1
(see
FIG. 13
) of the side face of the blade portion
13
, or so-called straight cutting in which, as shown in the XIVb portion in FIG.
12
C and in
FIG. 14B
, the blade portion
13
is cut perpendicular to the blade edge so that both cut ends
13
c
have a straight end face. As shown in
FIG. 15
, for example, the band blade
1
which has undergone miter cutting is placed so that the cut end
13
a
of the blade portion
13
is tightly butted against a side face of a blade portion
13
′ of another band blade
1
′ serving as a counter member.
Conventionally, when miter cutting and straight cutting are to be executed, different band-blade cutting tools each having a cutting blade of a shape corresponding to miter cutting or straight cutting are used.
However, execution of miter cutting and straight cutting by using different band-blade cutting tools has a drawback in that different mechanisms for respectively driving the band-blade cutting tools must be separately prepared. When such a band-blade cutting tool is incorporated into a band-blade working apparatus having functions such as that of bending a band blade so that the apparatus is further provided with a cutting function, the number of incorporated band-blade cutting tools is increased, thereby producing a problem in that the increased number of band-blade cutting tools impedes miniaturization of a band-blade working apparatus.
SUMMARY OF THE INVENTION
The present invention is derived from a consideration of the above-discussed circumstances and problems. It is an object of the present invention to provide a band-blade cutting tool which can perform both miter cutting and straight cutting.
It is another object of the present invention to provide a band-blade working apparatus in which, when a long band blade is to be cut so as to produce a band blade of a predetermined length and having ends that are miter-cut, the amount of movement of the long band blade that is required for connecting the front and rear ends of the band blade to each other can be reduced so that production efficiency can be enhanced.
It is a further object of the present invention to provide a band-blade working apparatus in which, when a band blade of a predetermined length is to be produced by bending a long band blade or cutting a bent long band blade, the production steps can be easily automated.
The present invention is directed to a band-blade cutting tool for cutting a band blade.
The band-blade cutting tool comprises: a pair of edged members which are opened and closed; cutting blades which are respectively disposed on the pair of edged members; miter-cutting portions which are respectively disposed on the cutting blades to obliquely crossly cut a blade portion of a band blade; and straight-cut portions which are respectively disposed on the cutting blades to straight cut the blade portion in a width direction of the band blade.
In the band-blade cutting tool, the miter-cutting portions which are respectively disposed on the cutting blades of the pair of edged members are used in miter cutting, and the straight-cut portions are used in straight cutting.
Preferably, in each of the cutting blades, the miter-cutting portion and the straight-cut portion are continuously formed in adjacent places of the cutting blade.
According to this configuration, by adjusting the movement amount of the band-blade cutting tool in remote and close directions with respect to the band blade, it is possible to select whether miter-cut working is conducted by the miter-cutting portions or straight-cut working is conducted by the straight-cut portions.
The band-blade cutting tool of the present invention may be configured so that arm portions are continuously integrated with the pair of edged members, respectively, the arm portions are swingably coupled to each other via a support shaft in places where the arm portions are continuously integrated with the edged members, and a cutting tool driving mechanism which opens and closes the pair of edged members about the support shaft via the arm portions is coupled to a free end portion of each of the arm portions. Preferably, the cutting tool driving mechanism has a rotating cam, and sliding members which are respectively disposed on the free end portions of the arm portions and correspond to the rotating cam.
According to this configuration, the arm portions which are continuously integrated with the pair of edged members, respectively are opened and closed by the cutting tool driving mechanism, whereby the pair of edged members are opened and closed about the support shaft. The cutting tool driving mechanism having the rotating cam has an advantage that the operation is surely conducted.
The present invention is directed also to a band-blade working apparatus which performs bending and cutting of a band blade.
The band-blade working apparatus comprises:
a bending mechanism which bends a band blade;
a band-blade cutting tool which cuts the band blade;
a pair of edged members which are disposed in the band-blade cutting tool and which are opened and closed;
cutting blades which are respectively disposed on the pair of edged members;
miter-cutting portions which are disposed on the cutting blades, respectively, to obliquely crossly cut a blade portion of the band blade and straight cut a ridge portion of the band blade from a root portion of a cut part of the blade portion in a width direction of the band blade; and
straight-cutting portions which are formed continuously with the miter-cutting portions and disposed on the cutting blades, respectively, to straight cut the blade portion and the ridge portion in the width direction.
Preferably, the band-blade working apparatus comprises a pair of band-blade cutting tools, the band-blade cutting tools are distributedly placed in the front and rear sides so that cut parts of the blade portion which is cut by the miter-cutting portions are oppositely inclined, and at least a front one of the front band-blade cutting tools is placed in front of the bending mechanism. In this case, preferably, the pair of band-blade cutting tools are distributedly placed in the front and rear sides of the bending mechanism. According to this configuration, the band-blade working apparatus can be easily miniaturized.
In the band-blade working apparatus of the present invention, a band blade is bent by the bending mechanism, and then cut by one of the pair of band-blade cutting tools which are distributedly placed in the front and rear sides. According to the configuration in which at least the front band-blade cutting tool is placed in front of the bending mechanism, even in the case where, afte
Crane Daniel C.
Jones Tullar & Cooper P.C.
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