Selective cutting (e.g. – punching) – With specific means to select a plurality of tools – Coded interposer
Reexamination Certificate
2001-01-19
2003-09-23
Shoap, Allan N. (Department: 3724)
Selective cutting (e.g., punching)
With specific means to select a plurality of tools
Coded interposer
C083S549000, C083S687000
Reexamination Certificate
active
06622908
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to punch machine for punching a hole out of material to be punched, such as a sheet by engaging a punch and a die with each other, and relates to punch machine equipped with a copying machine, a printer, a facsimile machine and a main body of an image forming unit of apparatus combining these machines, or a printing machine, for instance.
As shown in
FIG. 13
, in this kind of conventional punch machine, a pair of decentering cams
23
,
23
are unitedly provided with a rotating shaft
22
rotating by a motor
21
, and both ends of a punch holding member
25
having predetermined number of punches, for instance three punches
24
, are supported by a pair of decentering cams
23
,
23
.
When the decentering cams
23
,
23
are rotated, the punch
24
goes up and down by guiding by a guide hole
26
. On this occasion, the punch
24
is inserted in and engaged with the die
27
so as to punch a hole out of sheet P, which is stopping material to be punched, such as paper.
The going up and down distance of the punch
24
of the conventional punch machine
20
is set rather long in comparison with thickness of a sheet. This distance is extremely shorter than the length of a sheet.
For this reason, when the punch
24
of the conventional punch machine
20
is continuously moved up and down, the punch may descend again before taking the sheet already punched out of the punch machine
20
. So, there is a danger of punching the same sheet again. Therefore, the punch
24
is stopped at a waiting position away from a sheet until the sheet is taken out after punching a hole out of the sheet and a next sheet is set.
And, the punch
24
is provided with punch holding member
25
, going up and down by transmitting the rotational force of the motor
21
to the decentering cams
23
through reducing gear mechanism
28
and the rotating shaft
22
. Then, even if a motor
21
is stopped so as to try to stop the punch
24
at the utmost upper position, it is difficult to stop the punch
24
at the utmost upper position by inertia force, such as the motor
21
and the punch holding member
25
.
Besides, when the motor
21
is rotated at high speed so as to move the punch
24
up and down at high speed in order to improve machining efficiency of punching machining, the inertia force becomes to be further bigger. Then, it is much difficult to correctly stop the punch
24
at the utmost upper position.
Furthermore, the conventional punch machine
20
has the structure that the position and the number of the punches
24
can not be changed. Then, the position and the number of the hole to be punched out of a sheet can not be changed.
OBJECT OF THE INVENTION
The object of the present invention is to provide punch machine wherein the punches can be certainly waited at waiting positions so as not to give the punches the influence of the inertia force of the rotating driving means for moving the punch even if the punches are moved at high speed, and the position and number of holes to be punched out of a sheet can be changed.
SUMMARY OF THE INVENTION
A punch machine comprises a plurality of punches and dies for punching holes out of material. Driving means for reciprocating in first and second directions intersecting with respect to the punches by a driving force of a driving source is provided. The punch machine also has a cam mechanism for changing the reciprocating motion of the driving direction into a direction moving the punch and transmitting it to the punch; the cam mechanism is provided between each punch and the driving means.
The plurality of punches is divided into a first group and a second group. The cam mechanism is located between each punch of the first group and the driving means. The cam mechanism moves each punch by movement operation of the driving means in the first direction. The cam mechanism located between each punch of the second group and the driving means moves each punch by movement operation of the driving means in the second direction.
When the driving means is actuated, the motion of the driving means is changed into the moving direction of the punch by the cam mechanism. As a result, the punch punches a hole out of a sheet while advancing it into the die. In this case, the first group of the punch punches a hole out of the sheet and the second group of the punch punches a hole out of the sheet when the driving means is moved in the first and second directions, respectively.
Because the first group of the punch and the second group of the punch are located at positions different from each other, the positions of the holes to be punched out of the sheet by the first and second groups are also different from each other; the position of the holes to be punched out of a sheet can be changed by the movement direction of the driving means. The number of the holes to be punched out of a sheet also can be changed if the number of punches of the first group and the second group differ. Therefore, the punch machine of the present invention is a single machine that performs the functions of two machines.
The punch machine can prevent the punch from driving in the direction of the material to be punched even if the driving means overruns by the influence of inertia by driving the punch through use of the cam mechanism. The position of the punch can be easily controlled without greatly affecting the accuracy and positioning of the driving source.
Optionally, the punch machine can have a cam mechanism that has a cam slot and a cam-follower engaging with the cam slot. Energizing means, for energizing the punch in a direction approaching the material to be punched, can also be provided with the punch.
The punch machine may incorporate a cam mechanism so that each punch moves with a predetermined phase difference among the punches comprising each group.
The punch machine may also incorporate driving means having a plate member being free to reciprocate and drive by the driving source, wherein the cam slot is formed on the plate member, and the cam-follower is provided with the punch. In this structure, the cam slot can be easily formed, corresponding to each punch, and the driving mechanism can be made simple.
The punch machine may incorporate driving means having a plate member being free to reciprocate and drive by the driving source, wherein the cam follower is formed on the plate member, and the cam slot may be formed on the punch side.
The punch machine may incorporate driving means having a belt member being free to reciprocate and drive by the driving source and a plurality of cam cylinders for reciprocally rotating and driving in predetermined angular bounds by the belt member; the cam cylinders are respectively provided, corresponding to each punch, and the cam mechanism is provided between the cam cylinder and the punch. Because the flexible belt member can be used as the driving means, the freedom of the arrangement of the driving source and the punches is increased and functional design is possible.
The punch machine may incorporate cam mechanisms provided for respective punches. By providing the cam mechanism for each punch, independent motion can be added to each punch and the complex motion patterns of the punch can be actualized. Additionally, the punch machine provides for a cam mechanism to be used for two or more punches.
The structure can be made simple by using the cam mechanism. For example, the arrangement interval among the punches can be made narrower and a punch arrangement having various intervals can be obtained.
The punch machine may also incorporate driving means having a plate member comprised of a single plate member; the plate member can be free to reciprocate and drive by the driving source, and the cam mechanism can be respectively provided between the plate member and the punch. All of the punches can be reciprocated and driven through the plate member by reciprocating the plate member. Additionally, all of the punches can be driven with a single plate member, and the mechanism for driving the punches ca
Fukumoto Hiroshi
Taga Masanori
Daido-Kogyo Kabushiki Kaisha
Gilly, Esquire Richard P.
Prone Jason
Shoap Allan N.
Wolf Block Schorr and Solis-Cohen LLP
LandOfFree
Punch machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Punch machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Punch machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3045490