JP2012045653A - Stapler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new stapler that shows an empty state before the next operation by changing a behavior of the stapler after the last staple is punched out for binding.SOLUTION: The stapler A includes a staple magazine 1 for storing ordered staples SO, a driver 2 and a clinch body 3, to bind paper sheets P. In the stapler A, a notification projection 151 is formed on the tip of a pusher 15. The notification projection 151 locks on an elastically returning driver plate 22 after all the single staples S1 are punched out, and prevents upward return of the driver plate 22.

Description

  The present invention relates to a stapler that strikes staples by a finger pressing operation and easily binds sheets such as paper sheets, particularly when the last staple alone in the staple magazine is used up, and this is lost. The present invention relates to a novel stapler mechanism that can change the operational feeling and notify the situation.

Staplers are widely used as instruments for easily binding various paper materials. In this apparatus, a staple alignment body in which a large number of staples are loosely joined is accommodated in a staple magazine, and these are used while being sequentially ejected by a driver.
In this operation, even when all the staples of the staple aligning body are used and the staples of the staple magazine are used up, no special means for notifying this state is taken. When a driver is operated to drive out a pin, a so-called idle driving state is realized, and it is first noticed that there is no single staple.
Of course, the stapling operation is accompanied by the alignment work of the paper sheets to be bound as the previous operation, and the alignment operation was performed by the operator with considerable concentration. If the stapler was later emptied, it would be a psychological disappointment and labor for workers.

  For this reason, the need for a means of actively notifying that staples have been lost is also considered. For example, as an idea, when the staple magazine is empty, as in Japanese Utility Model Publication No. 5-16159, A display has been proposed (Patent Document 1). However, in this method, it is necessary to separately provide a member such as a warning plate, and the current mechanism has to be further greatly modified, and as a result, it has not yet been put into practical use as a product.

Japanese Utility Model Publication No. 5-16159

  The present invention has been made in consideration of these various backgrounds. After the staples are finally driven out and the binding operation is performed, the behavior of the stapler is changed before the next operation is started. This is an attempt to develop a new stapler that recognizes the empty state of staples.

  The stapler according to claim 1, comprising a staple magazine for storing staple alignment bodies, a driver having a driver plate for driving out staples alone, and a clinch body for bending and guiding the pin leg portions of the staples that have been driven out. The staple alignment body stored in alignment in the magazine is urged to the staple magazine tip side by a pusher, the single staple at the foremost part is pressed from above by a driver plate, and is ejected from a launch hole below the staple magazine tip, In the stapler in which the pin leg portion of the single staple that has been punched penetrates a plurality of paper sheets and is then guided and bent by a clinch body to bind the paper sheets, the pusher tip is provided with a notification projection. This notification action protrusion is used for all staples. After the driving is finished, the driver plate is elastically returned to the driver plate and is prevented from returning upward. On the other hand, the driver plate is provided with an engagement receiving portion of the notification action projection, The driver or pusher is provided with a return operation piece that pushes back the pusher locked to the driver plate to release the locked state.

  In addition to the above requirements, the stapler according to claim 2 is configured such that the notification action protrusion is provided on the front end surface of the pusher so as to be opposed to the front end surface, and always presses the pin leg portion of the staple unit at the final portion of the staple alignment body. A driver guide surface tilted rearward is formed on the upper part of the action projection, while the driver has a narrow upper upper portion of the driving end of the driver plate, and this step surface is used as an engagement receiving portion. Is a feature.

  The stapler according to claim 3, in addition to the above requirements, the return operation piece is provided at the center of the front end of the driver cover, and a flexible arm portion is formed in a hanging state downward, and the lower front surface is operated. A pressing projection is formed on the rear surface of the receiving portion, and the pressing projection penetrates the driver plate and pushes back a pusher located behind the driver plate.

  According to the first aspect of the present invention, after the last staple unit is driven out by the driver, the urged pusher moves further forward, and the notification action projection provided on the pusher is moved to the driver in the driver. The plate is pushed down so that it does not return upward, resulting in a notice stroke that is much less than the normal return stroke that the driver returns normally feels, so that the operator is manipulating the difference from the normal state. It is felt at the fingertip and staple replenishment work is performed for subsequent work, so-called idle driving is avoided.

  According to the second aspect of the present invention, the notification action projections are provided symmetrically on both side portions of the pusher, and the driver also makes the trunk portion slender so that the locking step portion is provided. It receives the engaging action of the notification action projection, and can prevent the driver from returning in a well-balanced manner.

  According to the third aspect of the present invention, the return operation piece is provided at such a position as to push the front surface of the pusher, and the return operation of the pusher can be performed in a well-balanced manner.

It is a perspective view which shows the stapler of this invention, and shows the side view explaining an operation state. It is a side view which decomposes | disassembles and shows the structural member of a stapler same as the above. It is a side view which decomposes | disassembles and shows the part of the driver plate of a stapler same as the above. It is a top view same as the above. It is a side view which shows the operation state at the time of steady of a stapler same as the above. It is a side view which shows the notification effect in the staple use state of the stapler same as the above.

  The mode for carrying out the present invention includes an embodiment described below, and includes various improved embodiments based on this technical idea.

Hereinafter, the stapler A of the present invention will be specifically described based on the illustrated embodiment.
The stapler A includes a staple magazine 1 that stores the staples S, a driver 2 that pushes out the staples S, a clinch body 3 that bends the pushed-out staples S, and a single pivot base 4 that pivotally connects them. Is the main member.

First, the staple S to be operated will be described. When used, the staple S is configured as a staple alignment body S0 in which a plurality of single staples S1 are loosely joined to each other, and the staple alignment body S0 is used when the staple magazine 1 is set.
Each of the staples S1 has a horizontal U-shaped form and has a dimension conforming to an appropriate standard. The central plane portion is a crown portion SC, and the portions that descend from both ends of the crown portion SC are pin legs. The part SP.
In the present specification, when there is no need to separately describe the staple alignment body S0 or the staple unit S1, they will be collectively referred to as the staple S.

Next, each main member will be described.
First, the staple magazine 1 has a trough rail 11 serving as a main body. For example, a metal material is bent into a channel shape, and the inside becomes a magazine trough 11A, and the staple alignment body S0 is stored. Is done.
A front end restricting plate 12 is provided at the front end of the trough rail 11, and the front end restricting plate 12 includes a front end slit 12A extending in the longitudinal direction at the center, as the left and right side plates of the trough rail 11 are bent. Further, a punching hole 13 is formed on the leading end side of the trough rail 11 of the staple magazine 1 so as to face the lower end portion of the leading end regulating plate 12.

  In the following description, regarding the definition of the direction of the front end, the front end, the front or rear end, and the rear, in the stapler A, the side on which the staple S is ejected is referred to as the front end, the front end, and the front, and the opposite side portion is the rear. Described as end, rear. As for the vertical direction, the standby state side of the driver 2 for driving out staples is defined as the upper side, and the side for driving out is defined as the lower side.

Next, the biasing structure of the staple S in the staple magazine 1 will be described.
In the staple magazine 1, various structures are employed for urging the stored staple S toward the ejection hole 13. As an example, a structure using a relatively simple pusher guide rod 14 is used. The configuration will be exemplified. That is, the pusher guide rod 14 is provided along the longitudinal direction at the center of the magazine trough 11A of the trough rail 11, and supports the pusher 15 so as to be slidable. The pusher spring 16 is contracted between the pusher 15 and the rear of the pusher guide rod 14, and the bias of the pusher spring 16 biases the staple S stored in the magazine trough 11A.
In the present invention, the pusher 15 and the driver 2 have characteristic structures. First, the overall stapler A will be described prior to these characteristic structures.

Next, the driver 2 will be described.
The driver 2 includes a driver arm 21. The driver arm 21 is provided in such a length as to cover the trough rail 11 as an example, and a driver plate 22 is provided at the tip thereof. The driver arm 21 is covered with a resin driver cover 23 to improve the feeling of use. Further, the driver 2 is provided with a presser arm 24, and the presser arm 24 presses the upper side of the staple S in the magazine trough 11 </ b> A, and staples S by a return spring 26 between the presser arm 24 and the driver arm 21. The driver 2 is prompted to return after launching.

On the other hand, a clinching body 3 is provided below the staple magazine 1. The clinching body 3 has a length dimension substantially close to the longitudinal direction of the staple magazine 1, and a clinching groove 31 is formed at a front end portion thereof, while a pivot support portion 32 is provided at the other end (rear side). Is provided in a standing state on both sides. The clinch body 3 is provided with a leaf spring-shaped magazine set spring 33 slightly rearward so that the clinch body 3 and the staple magazine 1 are always separated from each other, and the paper sheet P bound between them is always received. . The clinch body 3 is also covered with a resin-made lower cover 34 in order to improve the usability like the driver 2.
All of these members are integrally connected to the rotation base shaft 4 so as to freely rotate.

The configuration described above is the basic configuration of the stapler A, but the following characteristic configuration is employed in the present invention.
First, the pusher 15 in the staple magazine 1 is provided with a notification action projection 151 at the front end with respect to the pusher main body 150. For example, as shown in FIG. 1, the notification projections 151 are formed so as to project in a rib shape in the longitudinal direction on both sides of the front end surface of the pusher main body 150, and the lower ends thereof serve as locking step portions 152. On the other hand, the upper part is formed so as to incline backward toward the upper end, and this is used as a driver guide surface 153. In addition, the pusher main body 150 is formed with an operation projection 154 on its upper surface so that a finger hook can be obtained sufficiently in preparation for setting the staple alignment body S0 by pushing it back in the magazine trough 11A by manual operation. ing.

On the other hand, the driver plate 22 in the corresponding driver 2 has a somewhat narrower upper body than the driving end 22A, and the resulting step is used as the engagement receiving portion 22B. . As will be described later, the notification action projection 151 of the pusher 15 is locked to this portion. Further, the driver plate 22 is provided with a release hole 22C in the center somewhat above the engagement receiving portion 22B, and is configured so that the return operation piece 25 described below can be released through the release hole 22C. Yes.
That is, the return operation piece 25 is integrated with the driver cover 23 and includes an arm portion 251 that extends downward at the center of the front end thereof. The lower end portion of the return operation piece 25 serves as an operation receiving portion 252 and is opposite to the operation receiving portion 252. On the rear surface, a pressing protrusion 253 protrudes in a pin shape in a state facing rearward.

The present invention has the configuration as described above, and operates as follows to notify that the staple S has become empty when the last staple S1 of the staple S is used. .
First, in normal use, the staple alignment body S0 is accommodated in the staple magazine 1 according to a conventional method, and the paper sheet P to be bound between the staple magazine 1 and the clinch body 3 is positioned in that state. Then, a manual operation is performed in which the driver 2 is gripped so as to be driven into the clinch body 3 side.
As a result, the leading edge staple S1 of the staple aligning body S0 that has been urged in contact with the front end regulating plate 12 in the magazine trough 11A of the staple magazine 1 is pressed from above by the driver plate 22 of the driver 2. The loose joint with the staple aligning body S0 is released, the pin leg SP penetrates the paper sheet P, further reaches the clinch body 3, and is plastically deformed according to the curved guide shape of the clinch groove 31, and most of the pin legs The sheets SP are bent so that their tips approach each other, and the sheets P are bound.

  Then, after such a binding operation is completed, the operator releases the driver 2 while being almost unconscious in preparation for the next operation. As a result of such release of pressure, the staple magazine 1 and the clinch body 3 are separated from each other by the magazine set spring 33, and the staple magazine 1 and the driver 2 are driven by the return spring 26. As a result, as shown in FIGS. 1, 5, and 6, the dimension from the clinch body 3 to the upper end of the driver 2 ensures a steady return stroke H0.

Such an operation is continued, and the empty state notification state when the staple S is not used up is performed as follows. That is, the last staple S1 is in a state where the pin leg SP on both sides thereof is pushed out by the notification projections 151 of the pusher 15 and is pressed against the leading end regulating plate 12, and waits above the punching hole 13. It becomes a state.
At this time, if the driver 2 is driven in accordance with the normal use state, the last staple unit S1 penetrates the paper sheet P through the pin leg SP and is bent by the clinch body 3 in the same manner as the previous operation. The binding operation is completed. At this time, when the driver plate 22 in the driver 2 approaches the clinching body 3 while pushing the last staple unit S1, the driving end 22A comes to the bottom dead center as shown in FIG. 6B. Incidentally, at this time, the driver guide surface 153 is formed on the notification operation projection 151 of the pusher 15 so that the driver plate 22 is smoothly moved downward.

At this time, since the pusher 15 is always urged toward the front end restricting plate 12 by the action of the pusher spring 16, the staple unit S1 pushed by the pusher 15 disappears, and at the same time, the notification operation projection 151 is moved to the front end restricting plate 12. Advance until it touches the side. Naturally, this position is on the vertical movement trajectory of the driver plate 22 of the driver 2, and the driver plate 22 has the engagement receiving portions 22 </ b> B on both sides above the driving end 22 </ b> A of the notification action protrusion 151 in the pusher 15. It is located below the locking step portion 152.
In this state, the operator loosens the force pushing the driver 2 almost unconsciously and restores it. However, the driver plate 22 in the driver 2 has a projection projection on the pusher 15 above the engagement receiving portion 22B. Since 151 is located, the state where the locking step portion 152 prevents the driver plate 22 from returning upward is revealed.
As a result, the driver 2 cannot obtain a normal return stroke, and the change to the notification stroke H1 is felt very clearly when manually operated, and the operator feels uncomfortable with the binding completion operation. It is possible to recognize that the last staple unit S1 has been pushed out.
In such a case, the user recognizes the empty state of the staple S without being surprised, and moves to a replenishment operation of the staple aligning body S0.

By the way, in such replenishment of the staple S, it is needless to say that the movement preventing state of the driver plate 22 by the notification action protrusion 151 must be cancelled. The cancellation of the end notification state by the return operation piece 25 for this purpose will be described.
The end notification state is a state in which the notification action protrusion 151 of the pusher 15 is engaged above the engagement receiving portion 22B of the driver plate 22. This state is released by pressing the operation receiving portion 252 of the return operation piece 25 formed so as to be lowered from the center of the front end of the driver cover 23 of the driver 2.
By this operation, the pressing protrusion 253 of the return operation piece 25 passes through the release hole 22C provided in the center of the driver plate 22, and further pushes back the front end central portion of the pusher 15 located behind it. Incidentally, at this time, the operation receiving part 252 has a wedge shape such that the upper part protrudes somewhat in a side view. This is because the operation of the finger operated as shown by the arrow in FIG. It works to be near.
As a result, the pusher 15 is pushed back, the engagement between the locking step portion 152 of the notification projection 151 and the engagement receiving portion 22B of the driver plate 22 is released, and the driver plate 22 operates the return spring 26. In response, it returns to the upper steady position.
In such a state, the driver 2 side can be released upward and away from the staple magazine 1, and the staple alignment body S0 is set in the magazine trough 11A of the staple magazine 1 by performing a normal operation, and the subsequent staples are stapled. A binding operation by S is performed.

[Other Embodiments]
The present invention is based on the embodiment described above as one basic technical idea, but the point is that when the last staple unit S1 is pushed out, the return of the driver 2 may be prevented. The configuration is not limited as long as the object is achieved. In short, any configuration that can prevent the driver 2 from returning by the movement of the pusher 15 to the foremost end may be used.
When releasing the engagement between the pusher 15 and the driver plate 22 in a state where the staple empty state is notified, the side surface of the trough rail 11 of the staple magazine 1 storing the pusher 15 is partially opened by a slit or the like. As a matter of course, the pusher 15 may be returned to the straight rear side so that the side body surface of the pusher 15 can be manually picked.

A Stapler S Staple 1 Staple magazine 2 Driver 3 Clinch body 4 Rotation basic shaft

DESCRIPTION OF SYMBOLS 1 Staple magazine 11 Trough rail 11A Magazine trough 12 Tip restriction board 12A Tip slit 13 Launch hole 14 Pusher guide rod 15 Pusher 150 Pusher body part 151 Notification action protrusion 152 Locking step part 153 Driver guide surface 154 Operation protrusion 16 Pusher spring 2 Driver 21 driver arm 22 driver plate 22A driving end 22B engagement receiving portion 22C release hole 23 driver cover 24 presser arm 25 return operation piece 251 arm portion 252 operation receiving portion 253 pressing projection 26 return spring 3 clinch body 31 clinch groove 32 pivot support Part 33 Magazine set spring 34 Lower cover 4 Rotating basic shaft S Staple SC Crown part SP Pin leg part S0 Staple alignment body S1 Staple unit P Paper H0 steady return stroke H1 announcement stroke

Claims (3)

A staple magazine for storing staple alignment bodies, a driver having a driver plate for driving out staples alone, and a clinching body for bending and guiding the pin leg portions of the staples that have been driven out are arranged and stored in the magazine. The staple aligning body is urged toward the front end of the staple magazine by the pusher, the single staple at the foremost portion is pressed from above by the driver plate, and the staple is ejected from the ejection hole below the front end of the staple magazine. In the stapler where the leg portion penetrates a plurality of paper sheets, and is guided and bent by the clinch body to bind the paper sheets,
The pusher tip is provided with a notification action projection, which is locked to the elastically returning driver plate after all staples have been driven out and returned upward. On the other hand, the driver plate is provided with an engagement receiving portion for the notification action projection, and the driver or pusher is pushed back by pushing the pusher locked to the driver plate to release the locked state. A stapler characterized in that a return operation piece is provided.
The notification action protrusions are provided on the front end surface of the pusher so as to be opposed to each other, always pressing the pin legs of the staple unit at the end of the staple aligning body, and a driver guide surface inclined backward is formed on the upper part of the notification action protrusion. On the other hand, in the driver, the upper body portion of the driving end of the driver plate is configured to be narrow, and the stepped surface is used as an engagement receiving portion.
  The return operation piece is provided at the center of the front end of the driver cover, and a flexible arm portion is formed in a hanging state downward. 3. The stapler according to claim 1, wherein the pressing projection is configured to penetrate the driver plate and push back the pusher located behind the driver plate.

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