JP4862363B2 - Paper deflection prevention mechanism in paper press processing device - Google Patents

Description

  The present invention relates to a sheet bending prevention mechanism in a sheet pressing apparatus that prevents a sheet from bending during a pressing process such as a binding process or a punching process in a sheet pressing apparatus such as a stapler or a punch.

  For example, a stapler is provided with a clinch groove as a processing unit on a base table on which a plurality of stacked sheets can be placed, and an end portion of the sheet is set on the processing unit and pressed from above the sheet to be bound. It is a paper press processing apparatus provided with the press processing mechanism to process. The press processing mechanism is configured such that a staple storage magazine having a staple launching portion and an inner handle having a driver plate penetrating the launching portion are rotatably attached to a shaft provided on the base table, By rotating the outer handle from top to bottom, the bottom surface of the magazine's leading edge is pressed onto the paper, and the inner handle's driver plate is penetrated from above to the magazine's bottom. The staple located at the launching portion is pushed downward, the leg portion penetrates the paper, and the leg portion protruding below the paper is bent by a clinch groove to bind the paper (see Patent Document 1).

  Similarly, in the punching punch, a blade receiving portion is provided as a processing portion on a base table on which a plurality of stacked sheets can be placed, and an end portion of the paper is set on the processing portion, It is a paper press processing device provided with a press processing mechanism for pressing and punching. In this case, the only difference from the stapler is that a cylindrical drilling blade is provided instead of the driver plate.

By the way, these paper press processing devices are used frequently, although the paper press processing device for processing a large number of papers has a large press processing mechanism itself, so that the entire size is increased accordingly. Since it is not a thing, it is necessary to make it compact so as not to take up space when storing.
JP 2005-138247 A

  However, when processing a large amount of paper at a time, the whole paper is heavy and the rigidity of the paper itself is very low and flexible, so when the paper is set on the processing unit, both sides of the paper are bent and drooped low. May end up. When the processing is performed in a bent state, in the case of a stapler, the bent state is maintained, and thus there is a problem that when the paper is flattened, a part thereof swells or the end face of the paper is displaced. In the case of hole punching, there is a problem in that the punching position is shifted and the upper and lower sheets are not aligned when bound in a folder.

  In any case, it is important that the paper is flat when the paper is placed on the processing unit of the base table and the portion to be processed is set in the processing unit.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet bending prevention mechanism in a sheet pressing apparatus capable of solving the above-described problems and processing the sheet in a flat state during processing.

In order to solve the above-mentioned problem, the invention according to claim 1 provides a processing unit on a base table on which a plurality of stacked sheets can be placed, sets an end of the sheet on the processing unit, and In the paper press processing apparatus having a press processing mechanism that processes by pressing from above, the base can be placed with a part of the edge of the paper when the end of the paper is set on the processing part The edge of the paper protruding from the base table when the paper is placed on the base table can be supported flatly from the lower side in cooperation with the base table. An arm is provided, and the support arm is provided on both sides of the base table so as to be rotatable in the horizontal direction, and is in a closed state along both sides of the base table, and an open state spreading on both sides of the processing unit, It is possible to take .

According to a second aspect of the present invention, an arm receiving portion that receives the support arm is formed on both sides of the base base, the support arm is formed in a U-shaped cross section, and the arm receiving portion is the support According to the cross-sectional shape of the arm, the upper and lower surfaces and the outer surface of the base table are stepped down .

The invention according to claim 3 is characterized in that a click mechanism for positioning at a certain angle is provided in a support arm mounting portion in which the support arm is rotatably mounted on the base table .

The invention according to claim 4 is characterized in that the support arm has a vertically symmetrical structure .

The invention according to claim 5 is characterized in that a space enough to insert a fingertip is formed in a part between the base base and the support arm in the closed state .

According to the present invention, the base is provided with a size that allows the edge of a part of the sheet to be placed when the edge of the sheet is set on the processing unit. Although the sheet is large enough to bend, the base is provided with a support arm, and when the sheet is placed on the base, the edge of the sheet protruding from the base is the support arm. Is supported and held flat from below. Therefore, when the pressing mechanism is operated, the plurality of stacked sheets are uniformly processed from the upper surface side to the lower surface side. For this reason, distortion and deformation do not occur, and the finished processing state is improved.

In addition , when not in use, the whole can be accommodated within the width of the base stand so that it can be made compact.

  FIG. 1 is a perspective view of a stapler according to the present invention, and FIG. 2 is a longitudinal sectional view of the stapler. In the figure, reference numeral 1 denotes a base table. A paper placement surface 1a for placing paper is formed on one side of the base 1 and a clinch groove (processing portion) 2 is provided near the center, and a first support is provided at the other end. A plate 3 and a second support plate 4 are formed upright, and a magazine 6 and an inner handle 7 are rotatable on a first support shaft 5 provided on the first support plate 3 as a pressing mechanism. An outer handle 10 for driving the inner handle 7 is rotatably provided on the second support shaft 8 provided on the second support plate 4.

  The magazine 6 has a space for storing staples 11 connected to the inside thereof, and a punching portion 12 is formed at the tip thereof. A staple pusher 13 that presses the linked staple 11 toward the launching portion 12 is disposed inside the magazine 6.

  A driver plate 14 is held at the tip of the inner handle 7. The front end of the driver plate 14 is engaged with the upper end of the launching portion 12 of the magazine 6.

  The outer handle 10 drives the inner handle 7, and the outer handle 10 is formed by integrally joining two handle materials 10a and 10b, and the outside is covered with a resin cover 10c. A guide groove 15 curved in a gentle S-shape is formed on the side surface of the shorter handle member 10b, and the drive shaft 16 protruding from both sides of the inner handle 7 is engaged with the guide groove 15 as described above. The booster mechanism is configured by increasing the ratio of the distance between the action point (q) and the force point (r) with respect to the fulcrum (p) of the outer handle 10.

  When the outer handle 10 is pushed downward from above and rotated, the inner handle 7 and the driver plate 14 are driven downward together with the drive shaft 16 engaged with the guide groove 15, and the launching portion 12 at the tip of the magazine 6 is driven. Is pressed onto the paper a, and the driver plate 14 of the inner handle 7 is passed from the top to the bottom of the punching portion 12, whereby the leading staple 11 a supplied to the leading end of the magazine 6 is punched from the punching portion 12. It is. The staple leg can pass through the paper a placed on the paper placement surface 1a, and can be bound to the clinch groove 2 and bent to bind the paper a. When the binding is completed, the magazine 6, the inner handle 7, and the outer handle 10 are returned to the initial state of FIG. Only the book is sent and the next spell is prepared.

  According to the stapler configured as described above, by adopting the boosting mechanism, even if the force to push down the outer handle 10 is light, a driving force far greater than pushing down the driver plate 14 directly with the inner handle 7 can be obtained. A large number of sheets a can be bound.

  The base table 1 is formed in such a size that a part of the edge of the paper a can be placed when the end of the paper a is set on the processing section. This is to make the base 1 compact so that it does not get in the way when the stapler is not used.

  Next, as shown in FIG. 1, when the paper a is placed on the base stand 1, the edge of the paper a can be supported flatly from the lower side in cooperation with the base stand 1. A support arm 20 is provided. In other words, support arms 20 are attached to both sides of the sheet placement surface 1a of the base 1 so as to be freely opened and closed. As shown in FIG. 3, the support arm 20 is formed in a U-shaped cross section, and engaging projections 22 are formed at the ends of both side pieces 20a, 20b facing each other, and the base is a circular hinge. Parts 23 and 24 are formed, and both the hinge parts 23 and 24 are formed with a central rotation shaft 25 and a protrusion 26 provided near the periphery at positions facing each other. On the other hand, arm receiving portions 27 of the support arm 20 are formed on both sides of the sheet placing surface 1a of the base table 1. The arm receiving portion 27 has a shape in which the upper and lower surfaces and the outer surface of the base 1 are stepped down in accordance with the cross section of the support arm 20, and engagement concave portions 28 and 29 are formed on the upper and lower surfaces of the tip portion. The support arm mounting portion 30 formed on the upper surface of the support arm 30 is formed in an arc shape, a bearing portion 32 is formed at the center thereof, and a small hole 21 is formed on the circumference centering on the bearing portion 32. On the other hand, as shown in FIG. 4, a bearing portion 33 is formed at the center of the support arm attachment portion 31 formed on the lower surface of the base portion, but in the circumferential direction corresponding to the small hole 21, the bearing portion 33 is formed. An annular groove 35 for accommodating the protrusion 26 is formed.

  In the above configuration, when the support arm 20 is attached to the base base 1, the upper and lower hinge parts 23, 24 of the base part of the support arm 20 are pressed against the base part of the arm receiving part 27, so that the rotary shaft 25 is attached to the base base 1. The upper and lower support arm attachment portions 30 and 31 are engaged with the bearing portions 32 and 33 so as to be fitted into the arm receiving portion 27 from the outside. As a result, the support arm 20 is in a closed state, and the engagement protrusion 22 at the tip of the support arm 20 is engaged with the engagement recesses 28 and 29 of the arm receiving portion 27 so as not to be freely opened. When closed, the upper and lower surfaces 20a and 20b and the outer surface of the support arm 20 are flush with the upper and lower surfaces and the outer surface of the base 1 respectively. Further, in the closed state, a space 36 is formed between the tip of the support arm 20 and the arm receiving portion 27 so that a fingertip can be inserted. The support arm 20 can be opened and closed in the horizontal direction about the rotation shaft 25, and spreads at 180 ° on both sides of the clinch groove 2 when opened.

  In addition, positioning is performed at a certain angle by a click mechanism that engages and disengages the protrusion 26 on the upper surface side and the small hole 21 during rotation.

  According to the above configuration, when binding the paper a, as shown in FIG. 5, the support arm 20 is rotated to open at 180 °. As a result, a part of the surface expands on both the left and right sides of the clinching groove 2, so that when the paper a is placed on the binding stand, both sides of the clinching groove 2 are held flat without being bent. In this state, when the outer handle 10 is pushed down and the binding operation is performed, the paper a is uniformly bound from the upper end to the lower end by the staple. For this reason, there is no distortion or deformation, and the finish is good.

  The support arm 20 that prevents the bending of the paper a has a vertically symmetrical structure of the hinge portions 23 and 24. Accordingly, there is an advantage that the left and right support arms 20 can be used in common by using the support arm 20 upside down.

  On the other hand, the structure of the attachment parts 30 and 31 of the support arm 20 is vertically asymmetric. Small holes 21 are formed in the upper support arm mounting portion 30 at regular intervals in the circumferential direction, but an annular groove 35 is formed in the lower support arm mounting portion 31 instead of the small holes 21.

  According to the above configuration, when the stapler is installed on the upper surface of an office desk or the like, the hinge portion 24 on the lower side of the support arm 20 is supported so that the opened support arm 20 is supported by the installation surface 37 (see FIG. 4). Since the lower surface constitutes the lower end surface of the base base 1, the lower surface of the lower hinge portion 24 contacts the installation surface 37. In this case, since the protrusion 26 of the lower hinge portion 24 of the support arm 20 is accommodated in the annular groove 35 of the lower support arm 20 mounting portion, the rotation center is maintained when the support arm 20 is opened and closed. Accordingly, the hinge portion 24 below the support arm 20 does not bend up and down while operating smoothly.

  On the other hand, the upper hinge portion 23 of the support arm 20 moves upward each time the protrusion 26 gets over the small hole 21. As a result, the support arm 20 is positioned at a certain angle. However, if the same mechanism is adopted for the lower support arm 20, the protrusion 26 of the hinge portion 24 on the lower side of the support arm 20 moves down the small hole 21. And the resistance increases due to interference with the installation surface. Therefore, there is a possibility that the opening and closing operation of the support arm 20 cannot be performed smoothly. For this reason, an annular groove 35 is formed instead of the small hole 21 in the support arm mounting portion 31 on the lower surface side of the base base 1, and the protrusion 26 moves along the annular groove 35 when the support arm 20 rotates, thereby supporting arm. The 20 rotation shafts 25 are held at the rotation center. Therefore, the lower support arm mounting portion structure can always rotate smoothly, and the upper support arm mounting portion can be positioned at a certain angle by the click mechanism.

  As shown in FIG. 1, a positioning member 45 is provided on the base table 1 so as to be slidable along the longitudinal direction thereof, and positions a sheet end position when the sheet a is pressed and processed. The positioning member 45 is formed with an opening 46 at the portion corresponding to the processing portion of the base 1 so that the upper portion is opened and the corner portion of the sheet can be inserted.

  According to this positioning configuration, the positioning member 45 can be slid to make the processing position of the paper a accurate, and the corner of the paper a1 is inserted into the opening 46 and pressed against the corner of the paper a1. The support arm 20 is provided so as to be rotatable in the horizontal direction even when the loading posture of the sheets a and a1 changes, such as when processing (stapling, punching). Therefore, by arbitrarily selecting the rotation angle of the support arm 20 in accordance with the change in the mounting posture of the sheets a and a1, the edges of the sheets a and a1 can always be supported satisfactorily.

  As shown in FIGS. 1 and 5, by forming a plurality of mark grooves 47a, 47b, 47c on the support arm 20, the mark grooves 47a, 47b, 47c are used as alignment marks when the paper a is placed. Can be used.

  By the way, the structure of the support arm 20 is not limited to the above-mentioned embodiment. For example, as shown in FIG. 6 (a), it is possible to adopt a configuration that is usually stored in the base 1 and pulled out and stretched during binding. For example, by using a rack and pinion mechanism, a rack 39 is formed on opposite sides of the two support arms 38, and both racks 39 are engaged with a common pinion 40, whereby one support arm 38 is clinched. 2 may be automatically moved to the other side of the clinch groove 2 and the paper a may be supported from the lower side by the drawn support arm 38. When not in use, one support arm 38 may be pushed into the base table 1 so that the other is accommodated in the base table 1 or slightly exposed to the outside.

  Further, as shown in FIG. 6 (b), the support arm 41 is attached so as to be able to move in and out of the base table 1 by using a pantograph mechanism, and is reduced in size when not in use and stored in the base table 1, and extended when used. The sheet a may be supported from below.

  Further, as shown in FIG. 6 (c), the support arm 42 is formed by a belt-like spring plate material used for a convex (measure) or the like, and is housed in the base table 1 in a coiled state. The configuration may be such that one end is pulled out and straightened during use.

  Further, the above-described sheet bending prevention mechanism is not limited to the stapler. The present invention can also be applied to a paper pressing device that prevents the paper from being bent at the time of punching processing by a punch.

It is a perspective view of one embodiment of a stapler concerning the present invention. It is a longitudinal cross-sectional view of the said stapler. It is a disassembled perspective view of a base stand and a support arm. It is sectional drawing of the hinge part of a support arm. It is a perspective view of a stapler which shows the state where a support arm was opened. (A) (b) (c) is the top view which showed the other example of the support arm simply.

a Paper 1 Base stand 2 Clinch groove (Processing part)
21 support arm 23 opening

Claims (5)

A sheet provided with a processing unit on a base table on which a plurality of stacked sheets can be placed, a processing unit that sets an end of the sheet on the processing unit, and presses and processes the sheet from above the sheet In the pressing device,
The base table is provided with a size that allows an edge of a part of the paper to be placed when the edge of the paper is set on the processing unit.
A support arm capable of supporting the edge of the paper protruding from the base table in a flat manner from the lower side in cooperation with the base table when the paper is placed on the base table ;
The support arm is provided on both sides of the base table so as to be rotatable in a horizontal direction, and can take a closed state along both sides of the base table and an open state spreading on both sides of the processing unit. A sheet bending prevention mechanism in the sheet pressing apparatus.   Arm receiving portions for receiving the support arms are formed on both sides of the base table,
  The support arm has a U-shaped cross section,
  2. The sheet press processing apparatus according to claim 1, wherein the arm receiving portion has a shape in which an upper and lower surfaces and an outer surface of a base table are stepped down in accordance with a cross-sectional shape of the support arm. Anti-bending mechanism.   The paper pressing mechanism according to claim 1 or 2, wherein a click mechanism for positioning at a predetermined angle is provided in a support arm mounting portion in which the support arm is rotatably mounted on the base table. A sheet bending prevention mechanism in a processing apparatus.   The sheet bending prevention mechanism in the sheet pressing apparatus according to claim 1, wherein the support arm has a vertically symmetrical structure.   The sheet according to any one of claims 1 to 4, wherein a space between the base table and the support arm in the closed state is formed so that a fingertip can be inserted. A mechanism for preventing sheet deflection in the press processing device.

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