JP4089232B2 - Electric stapler - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric stapler, and particularly to an electric stapler provided with a stapler rotating mechanism.
[0002]
[Prior art]
The electric stapler built in the copier is configured to staple paper with a driver unit and a clincher unit separated from each other vertically, and multiple sets of driver units and clincher units according to the binding position of the paper. And a movable type in which a pair of driver units and a clincher unit are moved and stapled to a plurality of locations on the paper.
[0003]
In the movable electric stapler, the driver unit and the clincher unit are respectively engaged with the guide shaft and moved in synchronization with the timing belt. The first gear or cam of the drive gear mechanism of the driver unit and the clincher unit is slidably fitted to two drive shafts such as a spline shaft or a D-shaped cross-section shaft installed in parallel with the guide shaft. By rotating the drive shaft, the driver and the clincher are driven via a gear or a cam, and a binding operation is performed. There is also known a mobile electric stapler in which a motor is mounted on each of a driver unit and a clincher unit, and a binding operation is performed by controlling a traveling motor, a driver driving motor, and a clincher driving motor by a control circuit. .
[0004]
[Problems to be solved by the invention]
In addition to the back-stitching function to staple staples at multiple locations on one side of the paper to the mobile electric stapler, add a diagonal corner binding function to strike staples at an angle of approximately 45 degrees to the edges of the paper. A mechanism that rotates the unit and clincher unit horizontally by about 45 degrees is required. In this case, in the conventional power transmission mechanism that drives the driver and the clincher by the drive shaft installed between the frames, the driver unit and the clincher unit cannot be rotated horizontally with respect to the drive shaft. In general, a motor is mounted on each of the motors and the driver and the clincher are driven separately. However, in the above configuration, a horizontal rotation drive mechanism is provided in addition to the driver drive mechanism and the clincher drive mechanism, and the configuration becomes complicated, resulting in an increase in the number of parts, an increase in size, and an increase in cost. Therefore, a technical problem to be solved in order to provide a simpler horizontal rotation mechanism of the driver unit and the clincher unit arises, and the present invention aims to solve the above problem.
[0005]
[Means for Solving the Problems]
The present invention is proposed to achieve the above-described object. A stapler is slidably engaged with a guide shaft and a drive shaft arranged in parallel, and the stapler is moved along the guide shaft by a stapler moving mechanism. At the same time, in the movable electric stapler that drives the stapler by rotationally driving the drive shaft and performs the binding process, the stapler is horizontally attached to the carriage that is slidably engaged with the guide shaft and the drive shaft. A gear shaft that passes through the center of rotation of the stapler and the drive shaft are connected by a bevel gear to form a stapler drive mechanism. Power is transmitted from the drive shaft to the gear shaft to drive the stapler, and the gear shaft is connected to the stapler. A brake for braking is provided, the brake is driven by the brake control means to brake the gear shaft, and Stapler by rotating the shaft is intended to provide an electric stapler which is characterized by being configured to horizontally rotate.
[0006]
Further, the present invention provides an electric stapler provided with a stopper mechanism for stopping and releasing the stopping of the stapler at a predetermined rotational position.
Further, the stapler is provided with a swing lever and lever driving means, and the lever has its tip engaged with the bevel gear of the gear shaft so as to brake the bevel gear and the gear shaft, and the other end of the stapler is rotatable. It can be switched between two positions, the stapler fixing position that engages with stoppers such as holes and claws formed in the carriage and stops the rotation of the stapler. An electric stapler configured to be switched to is provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front sectional view of the left side portion of the electric stapler, in which a clincher portion A composed of a clincher carriage 1 and a clincher unit 2 is disposed above, and below that a driver portion B composed of a driver carriage 3 and a driver unit 4 The clincher part A and the driver part B face each other with a paper table (not shown) arranged in the middle between the upper and lower sides. 2 is a front sectional view showing the clincher part A and the driver part B, and FIG. 3 is a sectional view taken along the line AA in FIG.
[0008]
In the left vertical frame 5 shown in FIG. 1 and the right vertical frame (not shown) facing the left vertical frame 5, two upper and lower guide shafts 6 are installed horizontally and shifted in the front-rear direction. As shown in FIG. 3, a drive shaft 7 having a non-circular cross section in which the outer peripheral surface of a cylinder is cut is disposed between the front and rear guide shafts 6. The two upper and lower drive shafts 7 are rotationally driven in the same direction by a motor 9 via a reduction gear 8 shown in FIG. The upper clincher carriage 1 and the lower driver carriage 3 have the same shape, and two guide shafts 6 pass through the guide holes 11 formed in the left and right side plates 10, and are provided between the two guide holes 11. The drive shaft 7 passes through the hole 12.
[0009]
The clincher part A and the driver part B are moved left and right by a known movement mechanism using a timing belt. Although not shown, gear pulleys are arranged in the vicinity of the left and right ends of the guide shaft 6, the timing belt is hung around the left and right gear pulleys, and one timing belt is fastened to the clincher carriage 1 and the driver carriage 2. By being rotationally driven by the stapler moving motor, the clincher part A and the driver part B travel to the left or right in synchronization.
[0010]
The clincher part A and the driver part B have the same mechanical structure for driving and rotating, the following is a description of the clincher part A, and for the driver part B, the same reference numerals are given to the same constituent parts as the clincher part A, and the explanation is made. Is omitted. As shown in FIGS. 2 and 3, the clincher carriage 1 and the clincher unit 2 attached to the lower surface of the clincher carriage 1 are connected by a hollow flange shaft 13 and a bush 14, and the clincher unit 2 is supported so as to be rotatable in the horizontal direction. ing. Bevel gears b and c are attached to both ends of a gear shaft 15 that passes through the center hole of the flange shaft 14, and the bevel gear b on the clincher carriage 1 side is a first-stage bevel gear a that is attached to the internal bearing portion 16. The bevel gear c on the clincher unit 2 side is meshed with the final large-diameter bevel gear d attached to the shaft 18 of the clincher cam 17. The first stage bevel gear a is slidably fitted to the drive shaft 7, and the clincher carriage 1 and the clincher unit 2 can move left and right along the guide shaft 6 and the drive shaft 7.
[0011]
A brake lever 19 is disposed in the vicinity of the bevel gear c in the clincher unit 2, and a brake lever rotating means (not shown) such as a solenoid is provided to rotate the brake lever 19. The tip of the brake lever 19 faces the tooth surface of the bevel gear c, and the other end enters a slot 21 formed in the bottom plate of the clincher carriage 1 through a hole 20 formed in the frame of the clincher unit 2.
[0012]
FIG. 4 shows the shape of the slot 21 of the clincher carriage 1, which is a 45-degree arc-shaped slot centered on the shaft hole through which the flange shaft 13 passes, with recesses 21a and 21b directed toward the center formed at both ends. Yes. As shown in FIG. 2, the brake lever 19 is initially separated from the teeth of the bevel gear c in the initial state, and the other end is engaged with the 0-degree recess 21a of the slot 21, and the clincher unit 2 is the clincher carriage 1 However, the rotation is fixed at 0 degree and cannot be rotated. Further, when the brake lever rotating means is driven and the brake lever 19 is rotated clockwise in FIG. 2, the tip of the brake lever 19 meshes with the teeth of the bevel gear c, and the other end is a recess of the slot 21. The clincher unit 2 can rotate out of the position 21a.
[0013]
Next, the operation of the electric stapler will be described. The electric stapler is controlled by the control unit of the copying machine to perform back binding that binds two places on one side of the paper, or oblique binding that places staples at a 45 degree angle to the corner of the paper. When one copy set of paper is fed from the copying mechanism to the paper table, staples are driven at the left end position shown in FIG. 1 in the back binding mode, and the clincher unit A and the driver unit B are moved to a predetermined position on the right by the stapler moving mechanism. Move to and staple.
[0014]
In the back binding mode, the brake lever 19 is maintained in the initial state shown in the figure, and the clincher unit 2 and the driver unit 4 are fixed at the 0-degree rotation position. When the motor 9 is driven at the predetermined left and right binding positions, the rotation of the drive shaft 7 is transmitted to the clincher cam 17 and the driver cam 22 via the bevel gears a, b, c, d, and the clincher unit 2 descends and presses the paper, the driver 23 of the driver unit 4 rises and ejects staples, and the clincher 24 of the clincher unit 2 descends and bends the legs of the staples. It is bound.
[0015]
When the diagonal binding is set, the clincher part A and the driver part B are moved to the rightmost diagonal binding position by the stapler moving mechanism, the brake lever 19 is rotationally driven from the initial state, and the tip is moved to the teeth of the bevel gear c. The meshing bevel gears b, c, d are fixed to the clincher unit 2 and the driver unit 4 so as not to rotate, and the other end of the brake lever 19 is disengaged from the recess 21a of the slot 21 so that the clincher unit 2 The driver unit 4 can rotate with respect to the carriages 1 and 3, respectively. When the drive shaft 7 is rotationally driven in this state, the clincher unit 2 and the driver unit 4 rotate integrally with the bevel gears b and c, and when rotated 45 degrees, the other end of the brake lever 19 has an arc shape shown in FIG. The clincher unit 2 and the driver unit 4 stop rotating at the 45 ° end position of the slot 21. At this time, when the drive of the brake lever 19 is released, the brake lever 19 returns to the initial position, the tip is disengaged from the bevel gear c, and the other end is engaged with the 45-degree recess 21b of the arc-shaped slot 21 to be the clincher unit. 2 and the driver unit 4 are fixed at a 45 degree rotation position. Thereafter, the drive shaft 7 is rotationally driven by the motor 9, and the rotation of the drive shaft 7 is transmitted to the clincher cam 17 and the driver cam 22 via the bevel gears a, b, c, d, and the driver 23 and the clincher 24 are activated. The binding process is performed.
[0016]
After the binding process is completed, the brake lever 19 is rotated again from the initial state, the tip is meshed with the bevel gear c, the clincher unit 2 and the driver unit 4 are rotatable, the drive shaft 7 is rotated in the reverse direction, and the clincher unit 2 is rotated. The driver unit 4 is returned to the 0 degree rotation position, the brake lever 19 is returned to the initial state to fix the clincher unit 2 and the driver unit 4 to the 0 degree rotation position, and the clincher part A and the driver part B are fixed by the stapler moving mechanism. To the left and return to the left end initial position.
[0017]
As described above, the configuration in which the clincher unit 2 and the driver unit 4 are driven and rotated by one motor 9 has been described. However, the present invention is not limited to the above-described embodiment. For example, the arc angle of the arc-shaped slot 21 is set to 90 °. The clincher unit 2 and the driver are controlled by controlling the amount of rotation of the motor 9 and the brake lever rotating means by providing recesses for engaging the brake lever 19 at 0 degree rotation position, 45 degree rotation position, and 90 degree rotation position. Various modifications can be made within the technical scope of the present invention, such as allowing the unit 4 to rotate to a 0 degree rotation position, a 45 degree rotation position, and a 90 degree rotation position. It goes without saying.
[0018]
【The invention's effect】
As described above, the electric stapler according to the present invention has a simple configuration in which the movable stapler is driven and rotated by a single motor arranged on the frame side. Therefore, the driving and rotating motor is mounted on the movable stapler. Compared to an electric stapler configured as described above, the number of parts is reduced, which is effective in reducing the size and weight and reducing the cost.
[Brief description of the drawings]
FIG. 1 is a front sectional view of an electric stapler according to an embodiment of the present invention.
FIG. 2 is a front sectional view of a clincher part A and a driver part B.
3 is a cross-sectional view taken along line AA in FIG.
FIG. 4 is a bottom view of the clincher carriage.
[Explanation of symbols]
A clincher club
B Driver section
1 Clincher carriage
2 Clincher unit
3 Driver carriage
4 Driver unit
6 Guide shaft
7 Drive shaft
8 Reduction gear
9 Motor
15 Gear shaft
19 Brake lever
21 slot
21a 0 degree recess
21b 45 degree recess
abc d bevel gear

Claims (3)

The stapler is slidably engaged with the guide shaft and the drive shaft arranged in parallel, the stapler is moved along the guide shaft by the stapler moving mechanism, and the stapler is driven by rotating the drive shaft to bind the stapler. In the mobile electric stapler that performs
A stapler is horizontally mounted on a carriage that is slidably engaged with a guide shaft and a drive shaft, and a staple shaft drive mechanism is configured by connecting the drive shaft with a gear shaft passing through the rotation center of the stapler and the drive shaft. In addition to driving the stapler by transmitting power from the drive shaft to the gear shaft, the stapler is provided with a brake for braking the gear shaft and a brake control means, and the brake control means drives the brake to brake and drive the gear shaft. An electric stapler characterized in that the shaft is rotated horizontally by rotating the shaft. 2. The electric stapler according to claim 1, further comprising a stopper mechanism that stops and releases the stapler at a predetermined rotational position. The stapler is provided with an oscillating lever and lever driving means. The lever is engaged with the bevel gear of the gear shaft so that the bevel gear and the gear shaft can be braked. It can be switched to two positions, the stapler fixing position that engages with the formed stoppers such as holes and claws to stop the rotation of the stapler, and the lever is switched between the stapler rotatable position and the stapler fixed position by the lever driving means. 2. The electric stapler according to claim 1, configured as described above.

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