JP2556452Y2 - Control mechanism of electric stapler - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an electric stapler having a magazine for punching staples and a clincher having a movable clincher for bending the legs of the staples, and operates the magazine and clincher. It relates to a control mechanism for controlling.

[0002]

2. Description of the Related Art In a conventional electric stapler having a movable clincher, a staple driving side (a magazine side) and a clincher side are integrally attached to a frame, and the movable clincher is driven by a driving mechanism on the driving side. I was

[0003] However, since the magazine section rotates about the fulcrum, the driver plate provided on the magazine section also operates so as to draw an arc when the staple is driven toward the clincher section. Therefore,
When the thickness of the spelling paper is small, the driving angle of the leading end of the plate-shaped driver plate with respect to the surface of the paper is close to a right angle, and the position where the leading end of the driver plate contacts the paper surface is also close to the fulcrum. In contrast,
When the thickness of the paper is large, the driving angle of the driver plate with respect to the surface of the paper is small, and the position where the tip of the driver plate contacts the paper surface is far from the fulcrum.

As described above, in the stapler of the type in which the driving portion is rotated and driven, the penetration of the staple by the driver plate cannot be accurately grasped by the rotation speed of the electric motor. It was easy to get out of order.

[0005]

The object of the present invention is to solve the above-mentioned drawbacks and to accurately spell the sheet by bending the legs of the staple through the sheet by means of a driver plate irrespective of the thickness of the sheet and then bending the legs by a movable clincher. It is an object of the present invention to provide a control mechanism of an electric stapler capable of realizing the following.

[0006]

In order to achieve the above object, a control mechanism for an electric stapler according to the present invention includes a magazine provided with a driver plate for ejecting staples supplied from a staple storing section, and a staple ejected. A separate clincher portion having a movable clincher that bends the leg portion of the magazine portion so that the magazine portion and the clincher portion correspond to up and down so that the lower surface of the magazine portion abuts on the surface of the spelling paper. A driving mechanism for moving and driving the driver plate is provided, and a driving mechanism for bending and driving the movable clincher is provided on the clincher portion side, and a driving mechanism for the movable clincher when the driver plate penetrates the binding paper. And a control means for starting the operation.

[0007]

According to the above construction, the magazine section is operated by the drive mechanism on the magazine section side until the magazine section comes into contact with the surface of the spelling sheet, and the legs of the staples punched out by the driver plate penetrate the spelling sheet. I do. At this time, the drive mechanism of the clincher unit is operated by the control means to operate the movable clincher, and the staple legs are bent to complete the spelling.

As described above, the magazine section and the clincher section are provided with independent drive mechanisms. The magazine section operates, and a signal is output from the control means when the staples pass through the spelling sheet. Since the mechanism operates, the influence of the variation in the number of rotations of the electric motor is small, and good spelling can always be achieved.

[0009]

FIG. 1 shows an electric stapler. The electric stapler is composed of a magazine 1 having a frame 2 supporting a magazine body 1a for punching staples in a staple storage section, and staple legs ejected from the magazine 1. And a clincher part 4 for bending the part.

The frame 2 is provided with a drive mechanism for moving the magazine section 1 so as to make contact with the spelling sheet 5 and driving the driver plate 6 to drive. This drive mechanism fixes a cam 10 to a drive gear 9 linked to an electric motor 7 via a reduction gear 8,
A holder for engaging the rear end of the drive link 11 supported by the support shafts 16 on the left and right side walls of the frame 2 and holding the front end of the drive link 11 via the connection shaft 12 to the forming plate 13 and the driver plate 6 14.

The staples are formed by bonding straight staples in a sheet shape by adhesive bonding, and are stacked and housed in a cartridge 15 mounted on the magazine unit 1. Cartridge 1
The sheet-like staples a in 5 are sent to the front end of the magazine portion 1 in order from the lowest one, are formed into a U-shape by the forming plate 13, and are then punched out from below the front end of the magazine portion 1 by the driver plate 6. It is.

The cartridge 15 and the cartridge 1
The mechanism from staple feeding to staple forming and punching in 5 is the same as the mechanism provided in a known electric stapler, and therefore the description is omitted.

As shown in FIG. 3, vertically long blades 18 are formed on the front and rear sides of both sides of the magazine body 1a of the magazine portion 1, and a convex portion 19 is formed on the side of the blades 18.
Are formed. On the other hand, on both side walls of the frame 2, parallel vertically long guide holes 20 which are long vertically are formed. The convex portion 19 of the magazine portion 1 is slidably engaged with the vertically long guide hole 20 of the frame 2, whereby the magazine body 1 a is vertically movably supported on the frame 2 along the vertically long guide hole 20. You.

Next, the clincher unit 4 is provided with a movable clincher 22 on a binding table 21 on which the leading end of the binding paper 5 is placed. The clincher unit 4 is provided with a drive mechanism for the movable clincher 22. The drive mechanism includes a drive gear 25 linked to an electric motor 23 via a reduction gear 24,
A cam 26 fixed coaxially with the drive gear 25;
4A, the free end of the drive link 27 is disposed opposite to the lower part of the movable clincher 22 as shown in FIG. Thus, when the drive link 27 swings, the movable clincher 22 is turned up and down, and when it is turned up, the staple leg b is bent.

Further, there is provided a control means for starting operation of the drive mechanism of the movable clincher when the leg portion b of the staple has penetrated the spelling sheet 5.

This is configured so that when the drive mechanism of the driver plate 6 is operated and the leg portion of the staple has penetrated the minimum number (two) of the spelling sheets 5, the operation mechanism of the movable clincher 22 starts operating. I have. Driver plate 6
Is determined by the rotation angle of the cam 26 from the initial position, so that a predetermined angle (for example, 120 °)
When a moving clincher 22 is detected,
May be set to operate the electric motor 23.
When the number of sheets of spelling paper 5 is large, as shown in FIG. 4B, the driver plate 6 can penetrate the spelling paper 25 with a smaller moving amount than when the number of sheets is minimum. That is, since the rotation angle of the cam 26 has not reached 120 ° at the time when the staple leg b has penetrated the spelling sheet 5, the movable clincher is moved after a short time has passed (after reaching 120 °). There is no timing problem since 22 will be driven to bend the staple legs.

The magazine section 1 and the clincher section 4
Are configured to be able to move in the horizontal direction with respect to each other, but it is assumed that an alignment mechanism (not shown) that vertically and vertically aligns the magazine unit 1 and the clincher unit 4 is provided.

According to the above configuration, after the spelling paper 5 is inserted between the magazine unit 1 and the clincher unit 4 in a state where the magazine unit 1 and the clincher unit 4 vertically correspond to each other, the driving mechanism on the magazine unit 11 side When the electric motor 7 is operated, the cam 10 rotates together with the reduction gear 8, so that the rear end of the drive link 11 is pushed up by the cam 10 and oscillates about the support shaft 16, and the front portion of the drive link 11 Operates downward, and the connecting shaft 12 is also driven downward (FIGS. 2 and 3).
reference). For this reason, the driver plate 6 of the driving device
Is also driven downward, but since a frictional force acts between the components of these driving devices and the magazine body 1a, the magazine body 1a is
It is guided so as to move downward along the direction 0 in a direction substantially orthogonal to the spelling paper 5.

The magazine main body 1a descends until it comes into contact with the surface of the spelling sheet 5, but the driver plate 6 is further lowered by the drive link 11, so that the staple legs b of the staples struck by the driver plate 6 are used. Penetrate through. At this time, a signal is sent by the control means, and the electric motor 23 of the drive mechanism of the clincher unit 4 is operated, whereby the cam 26 is rotated, the drive link 27 is swung to operate the movable clincher 22, and the staple legs The part b is bent and the spelling is completed.

The spelled paper 5 whose spelling is completed is stored in the magazine 1
It can also be discharged through the space between the and the clincher unit 4. After the spelling operation, the drive link 11 swings in the opposite direction in accordance with the rotation of the cam 10, so that the magazine unit 1 also moves upward.

As described above, the magazine section 1 has the spelling paper 5
, The driver plate 6 can be driven in a direction perpendicular to the binding paper 5 regardless of the thickness of the binding paper 5, and the center position of the staple with respect to the binding paper 5 is Always the same.

In addition, the magazine unit 1 and the clincher unit 4 are provided with mutually independent drive mechanisms, and the magazine unit 1 operates, and when the staples pass through the spelling sheet 5, a signal is output from the control unit, and the clincher unit 4 Since the drive mechanism on the side is operated, the influence of the variation in the number of revolutions of the electric motor 7 is small, and good spelling can be always realized.

The operation control mechanism of the magazine unit 1 and the clincher unit 4 according to the present invention includes the magazine unit 1 and the clincher unit 4.
Can also be applied to an electric stapler having an integral structure.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a state before operation of an electric stapler according to the present invention.

FIG. 2 is an explanatory diagram showing an operation state of the electric stapler.

FIG. 3 is an explanatory diagram of a vertically moving state of the magazine section.

FIGS. 4A and 4B are explanatory diagrams of a spelling state when a spelling sheet is thin and a spelling sheet is thick;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magazine part 4 Clincher part 5 Spelling paper 6 Driver plate 22 Movable clincher

Claims (1)

(57) [Scope of request for utility model registration] 1. A magazine provided with a driver plate for ejecting staples supplied from a staple storage section, and a clincher having a movable clincher for bending a leg of the ejected staple are provided separately. Is provided so that the magazine unit and the clincher unit move up and down so that the lower surface of the magazine unit abuts against the surface of the spelling paper in a state where the magazine unit and the clincher unit correspond to each other up and down, and a driving mechanism for driving and driving a driver plate, A control mechanism for an electric stapler, comprising: a drive mechanism for bending and driving the movable clincher; and control means for starting operation of the drive mechanism for the movable clincher when a leg of the staple penetrates the spelling sheet.