JPH0663344U - Staple feeding device for electric stapler - Google Patents

Abstract

(57) [Summary] [Structure] The feed roller 3 is attached to the magazine unit 1 so as to come into pressure contact with the lower surface of the sheet-like staple from the cartridge 13.
2 is arranged, a rack is formed on the side of the supporting means of the magazine unit 1, and the feed roller 32 is operatively connected to the magazine unit 1 side via a one-way clutch gear 34 that meshes with the rack 33. The one-way clutch gear 34 rotates and the feed roller 32 rotates in the supply direction only when the clincher portion 4 moves away from the clincher portion 4. [Effect] Since the movement amount of the feed roller 32 can be adjusted by the meshing ratio of the one-way clutch gear 34 and the rack 33, a sufficient feed amount can be obtained. Further, the feed roller 32 is rotated by using the approaching / separating motion of the magazine section 1 with respect to the clincher section 4.
No special rotation drive means is required.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, a cartridge in which sheet-like staples are stacked and accommodated is detachably provided on the magazine section, and the movement of the magazine section and the clincher section at the time of driving is used to move the cartridge away from and to the cartridge section. The present invention relates to a staple feeding device for an electric stapler that feeds paper forward.

[0002]

[Prior art and its problems]

 A cartridge that stacks and stores sheet-shaped staples that are formed by adhesively connecting unformed staples in a sheet shape is detachably installed on the magazine part, and the lowermost sheet-shaped staples in the cartridge are fed forward when driving. Known feed mechanisms are those disclosed in Japanese Utility Model Laid-Open No. 1-156880 and Japanese Patent Laid-Open No. 4-129679.

The former is one in which a feed belt is arranged at the bottom of a cartridge, and the feed belt is brought into contact with the sheet-like staple in the lowermost layer, and the feed belt is moved to feed out the sheet-like staple. The latter is for feeding sheet-like staples by rotating the feed roller instead of the feed belt.

However, in any of the feeding mechanisms, the feeding force depends on the contact friction between the feeding means and the lowermost sheet-shaped staple, and therefore the feeding of the sheet-shaped staple is likely to be unstable. In particular, the lowermost sheet-like staple in the cartridge was in contact with the upper sheet-like staple with a strong frictional force, so that the feeding was insufficient.

[0005]

[The purpose of the device]

 SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks, and particularly to provide a staple feeding device in an electric stapler capable of ensuring the delivery of the lowermost sheet-like staple in a cartridge.

[0006]

[Means for achieving the purpose]

 In order to achieve the above object, a staple supplying device for an electric stapler according to the present invention is configured such that a cartridge in which sheet staples formed by adhering unformed staples in a sheet form are stacked and accommodated is detachably mounted on a magazine section. It is provided and the magazine part is supported by the supporting means so as to relatively move toward and away from the clincher part at the time of driving, and the sheet-like staple of the lowermost layer in the cartridge is sent forward and at the same time, the frontmost sent out. In the electric stapler for forming the unformed staples of the sheet portion and punching them toward the clincher portion, the magazine portion is pressed against the lower surface of the sheet-like staple of the lowermost layer sent out from the cartridge at the front position of the cartridge. While the feed roller is arranged on the side of the support means or the clincher, Formed, and the feed roller is operatively connected via the one-way clutch gear that meshes with the rack, and the one-way clutch gear rotates only when the magazine part separates from the clincher part, and the feed roller moves the sheet staple forward. It is characterized by rotating in the direction of supply.

[0007]

[Function and effect of the device]

 According to the above configuration, when the magazine part separates from the clincher part, the one-way clutch gear rotates and the feed roller rotates the sheet-like staples in the direction to be fed forward. On the other hand, when the magazine section moves close to the clincher section, the one-way clutch gear does not rotate, so the feed roller does not rotate.

As described above, the feed roller always rotates only in the feeding direction of the sheet-shaped staple by the one-way clutch gear, and the backward movement of the sheet-shaped staple is prevented, so that the sheet-shaped staple is smoothly fed. You can

Further, the rotation of the feed roller is obtained by the rotation of the one-way clutch gear, and the rotation amount of the one-way clutch gear can be adjusted by the meshing ratio with the rack, so that a sufficient feed amount can be obtained.

Further, since the feed roller is rotated by using the approaching / separating movement of the magazine part with respect to the clincher part, no special rotation driving means is required, so that the structure is simple and the failure rate is reduced. You can

[0011]

【Example】

 FIG. 1 shows an electric stapler. The electric stapler has a frame 2 (supporting means) slidably supporting a magazine unit 1 equipped with a striking device for striking the staples in a staple storage unit up and down. Below the magazine unit 1, a clincher unit 4 for bending the legs of staples ejected from the ejection device 3 at the front end of the magazine unit 1 is arranged.

An electric motor 5 and a reduction gear 6 linked to the electric motor 5 are arranged on the frame 2. An intermediate portion of a drive link 7 is rotatably supported on both left and right side walls of the frame 2, and a rear end of the drive link 7 is engaged with a cam 8 integrally formed with a final control gear of a reduction gear 6. However, the front end is linked to the launching device 3 provided at the front end of the magazine unit 1. A support shaft 9 is provided at an intermediate portion of the drive link 7, and the support shaft 9 is supported by a long hole vertically formed in the frame 2.

Further, the magazine unit 1 is provided with a staple storage unit and a hitting device 3 in a box-shaped magazine unit body 1a. The staple storage portion is composed of a removable cartridge 13. The staples are formed by adhering and connecting straight unformed staple materials into a sheet shape, and these sheet-shaped staples a are stacked and stored in the cartridge 13. The lowermost sheet-like staple a1 is supported by a staple guide 10 shown in FIG. 5, and is sequentially sent to the ejection device 3 side at the front end by a staple supply mechanism described later. The ejecting device 3 is arranged in the magazine unit main body 1a, and a holder 16 for connecting a forming plate 12 for forming staples in a U shape in order and a driver plate 11 for ejecting the formed staple a is provided in front of the magazine unit main body 1a. It is configured by penetrating a slit formed in the wall so as to project forward, and connecting a front end 7a of the drive link 7 to a connecting shaft 17 penetrating the holder 16. When the connecting shaft 17 moves, the driver plate 11 and the forming plate 12 operate along the inner surface of the front wall of the magazine main body 1a.

The mechanism for carrying the staples 13 and for feeding the staples in the cartridge 13, forming the staples, and ejecting the staples is the same as the mechanism provided in the known electric stapler, and the description thereof is omitted.

Next, as shown in detail in FIG. 3, a sliding protrusion 18 is formed on the outer side of the magazine main body 1 a, and the sliding protrusion 18 is engaged with a vertically elongated guide groove 19 formed in the frame 2. By combining them, the sliding protrusion 18 is supported so as to be movable up and down with respect to the frame 2 within the movable range. Therefore, at the time of driving, the magazine unit body 1a relatively moves toward and away from the clincher unit 4. A feeding mechanism is provided for feeding the lowermost sheet-like staple a1 in the cartridge 13 from the front side of the cartridge 13 and supplying it to the driving section at the front end of the magazine section by utilizing this approaching / separating operation.

This supply mechanism is configured so that the sheet-like staple a1 in the lowermost layer in the cartridge 13 is sent out by a predetermined amount, and the sheet-like staples sent out from the sending-out device 20 are further fed into the driving section at the front end of the magazine section. And a supply device 21 for supplying the

As shown in FIGS. 6 (a) and 6 (b), the delivery device 20 includes a plate-shaped pusher member 22 facing the rear end surface of the sheet-like staple a 1 in the lowermost layer, and a pressure contact with the surface of the pusher member 22. Then, it is composed of a roller 23 for advancing and retracting the pusher member 22, a gear 24 for giving rotation to the roller 23, and a rack 29a.

That is, behind the cartridge 13 of the magazine unit 1, a support surface 25 extending rearward of the staple guide 10 that guides and supports the lower surface of the lowermost sheet-like staple a 1 is formed, and the pusher member 22 is It is slidably arranged along the upper part. The front end of the pusher member 22 faces the rear end surface of the lowermost sheet-like staple a1 in the cartridge 13.

The roller 23 is for pressing the surface of the pusher member 22 and moving the pusher member 22 back and forth. The roller 23 is made of a rubber ring and is formed on the same rotary shaft 26 as the gear 24. Is supported by both side walls of the magazine body 1a. A rack member 29 that meshes with the gear 24 is arranged at the rear of the magazine unit 1. The rack member 29 is integrally formed with a bush 31 which supports the support shaft 28 of the cam 8, one end of which is engaged with the frame 2 so as not to move, and the other end of which is formed a rack 29a which meshes with the gear 24. ing.

Next, as shown in detail in FIGS. 4 and 5, the staple supply device 21 is configured to operatively connect the feed roller 32 and the rack 33 via a one-way clutch gear 34.

That is, the feed roller 32 is arranged in the vicinity of the staple outlet on the front wall of the cartridge 13 mounted in the magazine unit 1, is rotatably supported by the support shaft 36 fixed to the side wall of the magazine unit 1, and the upper surface is It faces the staple guide 10.

A drive gear 37 is fixed to one side of the support shaft 36 of the feed roller 32, and the drive gear 37 is rotatably supported by another support shaft 38 fixed to the side wall of the magazine section 1. It meshes with the one-way clutch gear 34. The one-way clutch gear 34 is composed of a first gear 34a, a second gear 34b, and a coil-shaped one-way clutch spring 34c, which face each other and are supported by a support shaft. A tubular portion 39 is integrally formed with a, and a one-way clutch spring 34 c is wound around the tubular portion 39. One end of the one-way clutch spring 34c is engaged with the convex portion 40 formed on the side surface of the second gear 34b. As a result, when the one end of the one-way clutch spring 34c tries to rotate the first gear 34a in a direction in which the one end of the one-way clutch spring 34c presses the convex portion 40, the one-way clutch spring 34c is closed and the first gear 34a and the one-way clutch spring 34c are integrated. From this, the rotational force of the first gear 34a is transmitted to the second gear 34b via the one-way clutch spring 34c, and the second gear 34b also rotates in the same direction. On the contrary, when the first gear 34a is rotated in the direction in which the one end of the one-way clutch spring 34c is separated from the convex portion 40, the one-wake latch spring 34c is loosened and the second gear 34b has the first gear 34a of the first gear 34a. The rotational force is not transmitted, the first gear 34a only idles, and the second gear 34b does not rotate.

The drive gear 37 coaxial with the feed roller 32 is meshed with the second gear 34b of the one-way clutch gear 34, and the drive gear 37 is integrally provided with a rotary body 41 for manual rotational operation. Is formed in.

The rack 33 is formed along the side of the vertically elongated guide groove 19 of the frame 2. The rack 33 is meshed with the first gear 34a of the one-way clutch gear 34.

Next, as shown in FIG. 1, the clincher unit 4 is for activating the movable clincher 44 on the binding table 43 on which the front end of the binding sheet 42 is placed by the drive mechanism after penetrating the binding sheet 42. is there. Of course, the clincher may be fixed.

According to the above configuration, after inserting the binding paper 42 between the magazine unit 1 and the clincher unit 4, the electric motor 5 of the magazine unit 1 is operated, whereby the cam 8 together with the reduction gear 6 is operated. Since it rotates, the rear end of the drive link 7 is pushed up by the cam 8 and swings around the support shaft 9, and the front portion of the drive link 7 operates downward, so that the connecting shaft 17 is also driven downward. (See Figure 2). Therefore, the driver plate 11 of the driving device is also driven downward, but since a frictional force acts between the components of these driving devices and the magazine main body 1a, the magazine main body 1a is spelled. It moves downward in a direction substantially orthogonal to the paper 42.

By the way, during the binding operation as described above, since the front end 7a of the drive link 7 swings downward in accordance with the rotation of the cam 8, the magazine section 1 also moves downward and moves closer to the clincher section 4. To do. Therefore, the gear 24 meshed with the rack 29a of the rack member 29 also rotates in the direction of the arrow in FIG. 6A, so that the roller 23 is also driven to rotate in the same direction. When the roller 23 rotates, the pusher member 22 in pressure contact with the roller 23 is moved rearward, so that the rear end of the pusher member 22 engages with the stopper 28 and stops.

After the stapling operation, the magazine section 1 also moves upward in accordance with the rotation of the cam 8 and separates from the clincher section 4, and the drive gear 24 meshed with the rack member 29 moves in the direction of the arrow in FIG. Since it rotates, the pusher member 22 is moved forward, and its front end engages with the rear end surface of the sheet-like staple a1 in the lowermost layer of the cartridge 13, and the sheet-like staple a1 moves along the staple guide 10. It is supplied to the front supply device 21.

In the supply device 21, as shown in FIGS. 4 and 5, since the first gear 34 a of the one-way clutch gear 34 of the magazine unit 1 meshes with the rack 33 of the frame, the magazine unit 1 The first gear 34a rotates when the gear moves upward, and the second gear 34b rotates in cooperation with the first gear 34a, and the drive gear 37 also rotates. Since the feed roller 32 rotates in accordance with the rotation of the driving gear 37, the sheet-shaped staple a1 on the staple guide 10 is supplied by the feed roller 32 to the front ejection device 3. The supplied sheet-shaped staple a is formed in a U shape by the forming plate 12 and is ejected downward by the driver plate 11. After the leg portions of the formed staple ejected by the driver plate 11 in this way penetrate the binding paper 42, the drive mechanism of the clincher portion 4 is actuated and bent, and the binding is completed.

Also in the staple supply device 21, the first gear 34 a of the one-way clutch gear 34 rotates in the opposite direction when the magazine unit 1 moves downward. However, in this case, since the rotational force of the first gear 34a is not transmitted to the second gear 34b, the drive gear 37 does not rotate. Therefore, the feed roller 32 does not rotate in the opposite direction.

As described above, according to the staple supply device 21, the feed roller 32 is always rotated only in the feeding direction of the sheet-like staple by the one-way clutch gear 34, and the backward movement of the sheet-like staple is prevented. The sheet-like staple can be smoothly supplied.

The rotation of the feed roller 32 is obtained by the rotation of the one-way clutch gear 34, and the rotation amount of the one-way clutch gear 34 can be adjusted by the meshing ratio with the rack 33. The amount is obtained.

Further, the feed roller 32 is rotated by using the approaching / separating movement of the magazine section 1 with respect to the clincher section, and since no special rotation driving means is required, the structure is simple and the failure rate is reduced. Can be made.

The drive gear 37 may be meshed with the rack 33, while the one-way clutch gear 34 may be fixed coaxially with the feed roller 32.

The rack 33 may be formed as a member that moves relative to the magazine unit 1, and is not limited to a frame (supporting unit) that supports the magazine unit 1, but may be formed on the clincher unit side. Good.

Further, in the staple feeding device having the above-described configuration, the electric stapler configured to rotatably connect the respective bases of the magazine unit 1 and the clincher unit 4, or the magazine unit 1 and the clincher unit 4 are not separated, It can also be applied to an integrally formed electric stapler.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of an electric stapler according to the present invention.

FIG. 2 is an explanatory view of an operating state of the electric stapler.

FIG. 3 is an explanatory view of an operating state of a magazine portion of the electric stapler.

FIG. 4 is a side view of the staple feeding device for the electric stapler.

FIG. 5 is an explanatory view from the front of the staple feeding device.

6 (a) and 6 (b) are operation explanatory views of the staple feeding mechanism.

[Explanation of symbols]

 a sheet-like staple 1 magazine part 2 frame 4 clincher part 13 cartridge 32 feed roller 33 rack 34 one-way clutch gear

Claims (1)

[Scope of utility model registration request] 1. A cartridge containing a stack of sheet-shaped staples obtained by adhesively connecting unformed staples in a sheet form is detachably provided on a magazine part, and the magazine part is relatively positioned with respect to the clincher part when driving. In an electric stapler that is supported by a supporting means so as to be moved toward and away from each other, and sends out the sheet-like staple in the lowermost layer in the cartridge to the front, and forms the sent out unformed staple at the foremost part toward the clincher part. In the magazine part, a feed roller is arranged so as to come into pressure contact with the lower surface of the lowermost sheet-like staple fed from the cartridge at the front position of the cartridge, while a rack is provided on the support means or clincher part side. Formed and fed through the one-way clutch gear that meshes with the rack. The stapler in the electric stapler characterized in that the one-way clutch gear rotates and the feed roller rotates in the direction for feeding the sheet-like staples forward only when the magazine portion separates from the clincher portion. apparatus.