# US 8,770,079 B2 · Sheet hole punching device

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- Number: US 8,770,079 B2
- Document ID: US8770079B2
- Status: Granted
- Kind: B2
- Application number: 13/483,821
- Filed: 2012-05-30
- Published: 2012-11-29
- Granted: 2014-07-08
- Earliest claimed: 2006-03-31
- Assignees: Seiko Corp.
- Applicants: Kenji Baba; Yuji Hasebe; Yoshinori Hoshino
- Inventors: Kenji Baba; Yuji Hasebe; Yoshinori Hoshino
- Web page: https://patentgrep.com/patent/US8770079B2

## CPC

- B26F 1/04: with selectively-operable punches
- B26D 5/16: Cam means
- B26D 7/1818: {by pushing out}
- B26F 1/14: Punching tools; Punching dies
- B26F 1/16: Perforating by tool or tools of the drill type
- G03G 15/6582: {Special processing for irreversibly adding or changing the sheet copy material characteristics or its appearance, e.g. stamping, annotation printing, punching}
- G03G 2215/00818: Punch device
- Y10T 83/8828: Plural tools with same drive means
- Y10T 83/8843: Cam or eccentric revolving about fixed axis
- Y10T 83/943: Multiple punchings
- Y10T 408/858: Moving means including wedge, screw or cam
- B26F: PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING (marking-out, perforating or making buttonholes A41H25/00; shoemaking A43D; surgery A61B; punching metal B21D; drilling metal B23B; cutting of metal by applying heat locally, e.g. flame cutting, B23K; cutting by abrasive fluid jets B24C5/02; details common to machines for severing B26D; drilling wood B27C; drilling stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; of glass C03B; of leather C14B; of textile materials D06H; for light guides G02B6/25; of tickets G07B)
- B26D: CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING (for growing crops or plants A01D, A01G; for fodder or straw A01F; for bulk butter A01J; for dough A21C; slaughtering A22B; for tobacco, cigars or cigarettes A24; marking-out, perforating or making buttonholes A41H25/00; manufacturing footwear A43D; brushmaking A46D; surgery A61B; disintegrating, mincing or shredding in general B02C; cutting wire, making pins or nails B21F, B21G; of the kind used formetal B23; cutting by abrasive fluid jets B24C5/02; hand-held cutting tools B26B; perforating, cutting-out, stamping-out or punching, or severing by means other than cutting B26F; for wood B27; for stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; article or web delivery apparatus incorporating cutting or line-perforating devices B65H35/00; for leather or upholstery B68, C14B; for glass C03B; making matches C06F; for peat C10F; for sugar C13B45/00; for textile materials D06H; civil engineering, building, mining, see Section E; for light guides G02B6/25; cutting processed photographic material G03D15/04)
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A sheet hole punching device has a device frame; a plurality of punching members arranged in first and second groups, and arranged linearly on the device frame; a driving rotation shaft; a driving motor reciprocally rotating the driving rotation shaft; a gear mechanism transmitting a rotation of the driving rotation shaft; cam mechanisms converting the rotational movement; and a motor control device. The gearing mechanism includes drive gears disposed on the drive rotational shaft, and receiving gears disposed on the punching members to engage with the drive gears. The cam mechanisms include cam followers and cylindrical cams. The cylindrical cam has a V-shaped groove cam to reciprocate each of the punching members between an upper dead point and a lower dead point. The punching members are rotated in one direction to punch holes in first sheets, and subsequently rotated in a reverse direction to punch holes in following sheets.

## Claims

### Claim 1

A sheet hole punching device comprising:
a plurality of punching members having first and second groups;
a device frame bearing-supporting the plurality of punching members to vertically move the punching members in a hole punching direction, the plurality of punching members being arranged linearly on the device frame;
a driving rotation shaft disposed in a direction crossing the punching members;
a driving motor reciprocally rotating the driving rotation shaft within a predetermined angular range;
a gear mechanism transmitting a rotation of the driving rotation shaft as a rotational movement to each of the punching members;
cam mechanisms converting the rotational movement of each of the punching members into a vertical movement in the punching direction at a same time of the rotation; and
a motor control device to control the drive motor,
wherein the gearing mechanism includes drive gears fixed on the drive rotational shaft, and receiving gears disposed on the punching members to engage with the drive gears, each receiving gear engaging each punching member so that the punching member slides in the punching direction and rotates, and
each cam mechanism includes a cam follower formed integrally with the punching member, and a cylindrical cam fixed to the device frame, the cylindrical cam having a V-shaped groove cam to reciprocate each punching member between an upper dead point and a lower dead point with respect to the rotation within the predetermined angular range.

### Claim 2 (depends on 1)

A hold punching device according to claim 1, wherein the motor control device is arranged to continuously punch holes by forward and reverse rotations of the driving rotation shaft, the punching members are rotated in one direction to punch holes in a sheet, and subsequently rotated in a reverse direction to punch holes in a following sheet, and
the first group of the punching members punches holes in the sheet by rotating the driving rotation shaft in one direction, and the second group of punching members punches holes by the rotation in the reverse direction of the driving rotation shaft.

### Claim 3 (depends on 1)

A sheet hole punching device according to claim 1, wherein the device frame comprises an upper frame and a lower frame with a predetermined interval,
each of the punching members is slidably supported between the upper frame and the lower frame,
the cylindrical cam is disposed between the upper frame and the lower frame,
the driving rotation shaft is spaced apart from the upper frame and is positioned above the upper frame, and
the receiving gear is disposed between the driving rotation shaft and the upper frame.

### Claim 4 (depends on 1)

A sheet hole punching device according to claim 1, wherein each of the drive gears and each of the receiving gears comprise bevel gears engaging with each other,
each of the drive gears is fixed integrally on the drive rotating shaft rotatably supported to the device frame, and
each of the receiving gears is held between the drive gear and the upper frame.

### Claim 5 (depends on 1)

A sheet hole punching device according to claim 1, wherein the driving rotation shaft is set with a first hole punching stroke for reciprocating in a first rotation angular range, and with a second punching stroke for reciprocating in a different second rotation angular range, and
the first hole punching stroke and the second hole punching stroke are set within ranges where the first and second hole punching strokes rotate in opposite directions each other at predetermined standard points in the driving rotation shaft.

### Claim 6 (depends on 5)

A sheet hole punching device according to claim 5, wherein the first hole punching stroke and the second hole punching stroke have different stroke lengths in response to number of holes to be punched, and
the length of the stroke with more hole punching numbers is longer than the length of the stroke with less hole punching numbers.

### Claim 7 (depends on 1)

A sheet hole punching device according to claim 1, wherein a gear engaging portion between each of the receiving gears and each of the drive gears, and a cam engaging portion between the groove cam and the cam follower, are positioned at an angular position facing relative to a center of a rotating axis of each of the punching members or within an angle range of 45 degrees.