JPH0691560A - Power stapler - Google Patents

Abstract

PURPOSE: To provide a power stapler simple in structure and capable of stable operation control. CONSTITUTION: This power stapler is provided with a head section 26 vertically moved by at least one drive arm 21 having a driven cam groove 22a, a rotary type drive gear 16, and a pin 16p provided on the drive gear 16 and controlled along the groove in the driven cam groove. The drive arm 21 turns around a spring urging shaft 40. While the drive pin 16p makes a turn, the head section 26 and a blade 32 are lowered to stop the stapler so as to be controlled and erected to make the stapler standby.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power stapler having a compact gear arm.

[0002]

2. Description of the Related Art Conventionally, a power stapler (U.S. Pat. No. 4,720,033, 4,844,319) to which a crank having an arm attached to the crank is applied has been proposed and used.

[0003]

However, such a stapler lacks a stable operation and simplification, and the drive control of the head and the blade for fastening the stapler is not specified.

[0004]

SUMMARY OF THE INVENTION The present invention comprises a power stapler having a drive blade and head having a blade holder controlled by at least one arm pivotally mounted on a spring shaft. ing. The arm is engaged with the blade holder via the correction groove on the front part of the arm. The arm is also provided at the rear of the arm with a matching cam groove for engaging a motor driven bull gear provided on a drive pin that drives with the bull gear in the annular passage. During one revolution of the drive pin, the head and blade are controllably lowered to staple and then stand to wait the stapler for subsequent cycles.

The arm shaft is spring-biased to compensate for the stapler deposited density.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A power stapler according to an embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 to 3, the power stapler 10 includes a base plate 11a and right and left frame plates 11 which are perpendicular to the base plate and are separated from each other by a predetermined distance.
A frame 11 having b and 11c is provided. The motor 12 provided between the right frame plate 11b and the left frame plate 11c is provided with a motor shaft 12a protruding through the left frame plate 11c and having a drive spur 12b mounted at its end. The drive spur 12b drives the first reduction gear 13a to sequentially drive the second reduction gear 13b and the third reduction gear 13c, and as a result, the bull gear 16 is driven counterclockwise. . Drive spur 12b and first to third reduction gears 13a to 13c
Are arranged in substantially the same plane. Bull gear 16
The bull shaft 17 is supported by a driven shaft 18 (see FIG. 2).
When the bull gear 16 rotates, the driven gear 18
Rotates.

Left drive arm 21 and right drive arm 22
Rotates about an arm shaft 40 fitted with a horizontal spring. These drive arms 21 and 22 are provided with left and right driven cam grooves 21a and 22a extended at their rear ends, and left and right correction grooves 21b and 22b at their front ends.
Is equipped with. Such arms 21 and 22 include a bull gear drive pin 16p attached to the bull gear 16, and
It is driven by a driven gear drive pin 18p attached to the driven gear 18. These pins 16p, 18p move along an annular passage during the stapler cycle. Therefore, the pins 16p, 18p, the left and right drive arms 2
1, 22 are almost in balance of force. It is anticipated that the central single drive arm may be applied alternatively.

A pivot stapler head 26 is also pivotally arranged about a pivot pin 27 provided on the frame 11. The upper end of the blade 32 is supported by a blade T-section holder 34 having a cross piece 36. The cross piece 36 includes the left end pin 36a inserted into the left correction groove 21b and the right correction groove 2
2b and the right end pin 36b inserted in 2b. Further, the T-section holder 34 includes an extension portion 34a having a hole 34b.
Is equipped with. The hole 34b has a function of guiding the holder 34 while the holder 34 moves up and down via the column 33 to which the head is mounted. Due to the fact that the head 26 vibrates around the pivot pin 27, the entire part of the head 26 provided with the blade 32 is extended to prevent jamming.
It vibrates in an arc shape including the T-section holder 34 provided with b and 22b.

1 and 2, an anvil 37, a head left stop pin 38a and a head right stop pin 38b are shown.
Pins 38a, 38b extend through the inside of the frame plates 11b, 11c and extend therethrough, during the upward movement of the head 26 after stapler fastening, the right and left stops 35a on the head 26. , 35b (see FIG. 4).

As shown in FIGS. 4 and 5, the arm shaft 40 is mounted together with the springs 41 and 42 in the openings 40a and 40b formed in the frame plates 11b and 11c in a state of being orthogonal to the frame plates. There is. In FIG. 4, only the frame plate 11c is shown, and the frame plate 11b is
It is partially shown in FIG. The openings 40a and 40b are
The cross section of the shaft 40 is sufficiently expanded. The springs 41 and 42 include upper hooks 41a and 42a, lower hooks 41b and 42b, and elastic portions 41c and 42c. The springs 41 and 42 are sized so that the lower hook is attached to the fixed frame shafts 43 and 44 in a tensioned state, and the shafts are pressed downward to be seated on the lower end of the opening 40a. . For example, when ten stacked laminated sheets 46 are engaged by the blade 32, the arm shaft 40 is erected on the lower end of the opening 40 a that corrects the thickness of the laminated sheets 46.

6, 7, 8, 9, and 10, the stapler head 26 is shown in FIG. 6 in an intermediate position where it can be raised as high as possible corresponding to the stops 35a, 35b. It is shown. When the drive pin 16p rotates clockwise, this drive pin engages with the correction groove 22a, moves downward along the lower wall LW, and raises the blade 32 to the upper position (see FIG. 7). Drive pin 16p
When engaged with the bent wall portion of the lower wall LW, the drive pin 16
p applies a small rotational moment to the drive arm 22 (see FIG. 8). Drive pin 16p is upward (see FIG. 1)
When the drive arm 22 is started to, the drive arm 22 rotates clockwise and is pressed downward. Following this rotation, the head 26 is moved downward against the laminated sheet 46 (see FIG. 9). By such rotation of the drive arm 22, the blade 26 is moved downward, and the stapler is driven (see FIG. 10).

[Brief description of drawings]

FIG. 1 is a side view of a power stapler according to an embodiment of the present invention.

FIG. 2 is a right side view of the power stapler shown in FIG.

3 is a top view of the power stapler shown in FIG. 1. FIG.

FIG. 4 is a partial cross-sectional side view showing a spring mounted on an arm pivot shaft at any position of the stapling cycle.

FIG. 5 is a partial cross-sectional view showing a state where the driving blade engages with the thickly stacked sheets and the pivot shaft stands up against the spring tension.

FIG. 6 is a side view showing the drive pin of the bull gear at a selected position of the adaptive arm driven cam groove.

FIG. 7 is a side view showing the drive pin of the bull gear at another position of the adaptive arm driven cam groove.

FIG. 8 is a side view showing the drive pin of the bull gear at another position of the adaptive arm driven cam groove.

FIG. 9 is a side view showing the drive pin of the bull gear at another position of the adaptive arm driven cam groove.

FIG. 10 is a side view showing the drive pin of the bull gear at another position of the adaptive arm driven cam groove.

[Explanation of symbols]

16p ... pin, 21 ... drive arm, 22a ... driven cam groove, 26 ... head.

Claims (3)

[Claims] 1. A driven cam groove provided in a power stapler having a frame for controlling and driving a driving blade, a head, and one or more pivot arms, and an extended shape driven cam groove in the pivot arm; A rotary drive gear provided on a rotary shaft, and a rotary drive gear provided on the drive gear and rotated together with the drive gear to stand up in and along the driven cam groove for turning the pivot arm. Stapler having a pin to be driven. 2. When engaging the drive blades with the stacked sheets, the arm shafts inserted into the frame grooves that are sufficiently enlarged can be moved upward, and two pivot arms are respectively provided on the arm shafts. The power stapler according to claim 1, wherein the power stapler is provided. 3. The power stapler according to claim 1, wherein the spur gear and the reduction gear are provided in substantially the same plane, and the spur gear and the reduction gear are driven by a motor shaft.