JP3857177B2 - stapler - Google Patents

Description

[0001]
[Industrial application fields]
  The present invention relates to a stapler used for driving a substantially U-shaped staple into a plurality of sheets and binding them.
[0002]
[Prior art]
  Conventionally, a substantially U-shaped staple is driven into a plurality of sheets of paper, and a plurality of sheets of paper are bent by bending the tip end of the staple needle penetrating the plurality of sheets of paper along the back side of the sheet. Many staplers that bind together are known.
[0003]
  However, in these staplers, a number of fairly strong springs are used in the stapler mechanism. For this reason, controlling the elastic force of the spring and pushing down the operation handle is a very difficult work for a weak person, especially women, children, the elderly, etc. The more sheets you can spell, the more force you need.If the stapler is operated dozens or hundreds of times in such a state, there are problems such as damaging muscles and the like, and fatigue, etc., especially with a large stapler.
[0004]
  One of the factors that cause the above problem is that the spring used in the stapler requires a considerably strong elastic force.
  17 has a base spring 43 interposed between a base 41 and a holder 42 and an elasticity of a handle spring 45 interposed between the holder 42 and an operation handle 44. The conventional stapler 40 shown in FIG. Two types of springs having different forces are used, and the handle spring 45 is a spring having a considerably stronger elastic force than the base spring 43.
  here,The reason why a spring having a strong elastic force as described above has to be used is that in a normal binding operation, when a plurality of sheets P, etc. are placed on the upper surface of the base 41 and the operation handle 44 is pressed downward, First, the base spring 43 is gradually crushed to suppress the elastic force of a plurality of sheets of paper P and eliminate the gaps between the plurality of sheets P, so that a plurality of pieces are formed at the tip of the holder 42 or the staple cassette C. A sheet of paper P is pressed against the upper surface of the base 41. Next, when the operating handle 44 is further pushed down from this state with a force greater than the elastic force of the handle spring 45, the blade 46 begins to descend accordingly, and the leading staple in the staple cassette is pushed down. The tip of the leg of the binding needle is bent on the anvil 47 fixed on the upper surface of the base 41 along the back surface of the sheet of paper P through the plurality of sheets of paper P and the like. A sheet of paper P or the like is bound. Here, if there is no gap between the paper sheets P, and the fluffy state is not changed to one solid state, the leg tips of the staples will play with the surface of the paper sheet P not facing the substantially vertical direction. For example, the problem that the needle does not pierce well occurs, and the leg tip of the binding needle does not penetrate perpendicularly to the paper or the like, resulting in a problem that it does not bind well. .
  For these reasons, a spring having a strong elastic force is used because it is necessary to hold a plurality of sheets of paper P or the like in a single mass.
[0005]
[Problems to be solved by the invention]
  In view of the conventional problems as described above, the present invention can firmly press a plurality of sheets of paper or the like on the upper surface of the base even when using a spring having a weak elastic force, and thus is good and stable. An object of the present invention is to provide a stapler excellent in workability and operability that can be easily handled even by a weak woman or child while maintaining the spelling quality. The second problem is to reduce the number of parts and simplify the structure, thereby reducing failures and reducing costs.
[0006]
[Means for Solving the Problems]
  In order to solve this problem, the invention described in claim 1A base provided with an anvil for folding a leg portion of a binding needle penetrating the paper or the like along a back surface of the paper or the like into a substantially flat state on a substantially flat upper surface on which a plurality of paper or the like is supported; A holder that is supported by the base and in which a loading portion for loading the binding needle is formed, and a blade for slidably mounting a leading needle of the binding needle stored in the loading portion; A base spring interposed between the holder and the base; an operation handle that is pivotally supported by the holder and engages with an upper end of the blade to drive the blade; and the operation handle and the holder A handle spring interposed between the holder and the holder so that the holder does not rise in the process of lowering the operation handle and completing the binding of the paper or the like with the binding needle. And locking means to conquer elastic force of the serial base spring locking the holder to the base And a lock release means for automatically releasing the lock means immediately after the paper or the like is bound by the binding needle.
[0007]
  According to a second aspect of the present invention, the locking means and the unlocking means according to the first aspect include a rack provided on the base with a plurality of teeth formed at equal intervals on one vertical surface of a substantially rectangular parallelepiped. A hook that engages with the teeth of the rack is formed at one end, a lock release pin is provided in the middle, and the other end is pivotally supported by the holder; A spring supported by the holder so as to be always urged, and an unlocking member having one end portion provided non-rotatably on the operation handle and a projecting piece formed on the other end portion, When the downward pressing force is released at the maximum lowering point of the operation handle after being bound with the binding needle, the unlocking pin is pulled up by the projecting piece, and the rack teeth and the hook engaging claws Is disengaged and waits before operation It is characterized in that it is configured to return to the location.
[0008]
  According to a third aspect of the present invention, the locking means and the unlocking means according to the first aspect include a rack provided on the base with a plurality of teeth formed at equal intervals on one vertical surface of a substantially rectangular parallelepiped. A hook that engages with the teeth of the rack is formed at one end, and the other end is pivotally supported by the holder, and the holder is always biased toward the rack. A spring that is supported and an unlocking member that protrudes downward from the operation handle, and presses the pressing piece of the hook downward at the maximum rising point of the operation handle at the standby position before operation. The engagement between the rack teeth and the hook claw of the hook is released, and when the operation handle is pressed downward, the lock release member of the operation handle is separated from the pressing piece of the hook, so that the hook is moved forward. The hook of the hook is urged by a spring and locked with the teeth of the rack and is locked by the unlocking member when the downward pressing of the operation handle is released after binding the paper or the like with a binding needle. When the pressing piece of the hook is pressed downward, the engagement between the hooking claw of the hook and the teeth of the rack is released, and the hook is returned to the standby position before the operation. .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
[0010]
  In the first embodiment of the present invention shown in FIGS. 1 to 11, reference numeral 1 in the drawings is a stapler, a base 2, a holder 13 supported so as to be swingable on the base 2, and a holder 13. The operation handle 26 is pivotally supported. The base spring 12 is interposed between the base 2 and the holder 13, and the handle spring 24 is interposed between the holder 13 and the operation handle 26. It is disguised. A blade 25 for driving the staple into a sheet or the like is slidably supported on the operation handle 26 and is slidably attached in the vertical direction in the holder 13 to constitute a conventional stapler portion. . In the present invention, a spring having a relatively weak elastic force is used as compared with a base spring and a handle spring of a conventional stapler. The base spring 12 is a spring having a weaker elastic force than the handle spring 24. A rack 8 is fixed to the upper surface of the base 2, which is a mechanism portion of the present invention, and the hooks L, R16, and 16A are pivotally supported on the holder 13 so as to be rotatable. A spring 21 is attached to the holder 13 for urging the hooks L, R16, 16A toward the rack. The rack and hooks L, R16, 16A and the spring 21 constitute the lock means RO. The operation handle 26 is fixedly provided with an unlocking member 28 that is a part of the unlocking means RE. This will be described in more detail below.
[0011]
  Hereinafter, the description will be made with reference to FIG. 1. The base 2 is formed in a flat box shape in which the inside is formed hollow and the lower part is opened. From the center of the base 2 to the upper right side, It is formed substantially flat to support the paper. On the left side are support members 3 and 3 that guide the front and rear wall surfaces of the lower part of the holder 13.Face to faceThus, it is integrally formed on the upper surface of the base 2 (see FIG. 2). A support recess 4 is formed at substantially the center of the support members 3 and 3, and a mounting hole is formed in the bottom (see FIG. 5). A recess for standingly accommodating the base spring 12 is formed adjacent to the right side of the support recess 4. In addition, the shallow concave portion formed in the upper surface plate 7 of the substantially central portion of the base 2 is made of a metal rectangular plate, and the leg portion of the binding needle penetrating a plurality of sheets P or the like is approximately along the back side of the sheet. An anvil 5 in which a folding groove for bending in a flat state is formed is fixed. Then, a plate-like bottom plate 6, which is provided with a slip stopper or the like, is fitted and fixed to the opening on the lower surface of the base 2 by a concave portion and a convex portion formed on the base 2 and the bottom plate 6. Further, on the upper surface of the base 2, a rectangular parallelepiped shape is formed at the right end portions of the support members 3 and 3, and the right vertical surface is equally spaced.toothThe racks 8, 8 formed in a plurality of stages in parallel with each other 9 are erected at opposing positions sandwiching the holder 13 and inserted from below the mounting holes formed in the base plate 2 upper surface plate 7. 8 is fixed to the screw holes of the base plate 2 upper surface plate 7 by screws 31 and 31 through mounting holes 11 and 11 formed in the support pieces 10 and 10 formed to protrude left and right at the lower part of 8 ( 2 and 3).
[0012]
  Of the rack 8tooth9 is formed at a pitch of about 1 millimeter and is arranged on both sides of the holder 13 in this embodiment (see FIG. 3). By attaching a 0.5 mm spacer between the upper surface of the support pieces 10 and 10 of the rack 8 and the lower surface of the base,toothWhen combined with the above, the pitch becomes 0.5 millimeters, and the interval for pressing the paper P becomes narrow. However, the present invention is not limited to this. Usually, the rack 8 may be attached to only one side and a spacer may be used. You can use it without putting it in. Also,toothIn this embodiment, the pitch is about 1 millimeter pitch, but the pitch is not limited to this.
[0013]
  The holder 13 is integrally formed in a shape in which two substantially rectangular parallelepipeds are arranged horizontally and are connected stepwise in a stepped manner, and the left side portion is opened on the right side, and the binding needle cassette C accommodates it. A loading portion and an insertion port are formed. A support member 14 is integrally formed with the holder 13 so as to protrude in the vertical direction at the bottom of the left portion. Further, the portion on the right side of the holder 13 forms a hollow portion opened upward and is reinforced with a plurality of ribs. Support shafts 15, 15 that pivotably support the operation handle 26 are formed to project at opposing positions above the outer front and rear wall surfaces. Further, a guide member is formed in the right end of the holder 13 in the right side portion to guide the blade 25 slidably moved in the vertical direction so that the upper portion is engaged and supported in the operation handle 26. . At positions facing the lower part of the front and rear wall surfaces of the holder 13 on the right side portion, hooks L, R16, 16A are pivoted by screws 31 through a shaft hole 18 formed in the support piece 17 so as to be rotatable. It is pivotally supported (see FIG. 3). The hooks L, R16, 16A are integrally formed by pressing a steel plate, a stainless steel plate, or the like. In the substantially middle part of the front surface of the hooks L, R16, 16A, a lock release pin 20 having a cylindrical shape and an inclined surface 20a formed in a substantially upper half is press-fitted into an attachment hole formed in the hooks L, R16, 16A. Alternatively, it is fixed by caulking or the like (see FIG. 8). Further, a locking claw 19 having a pointed tip is formed integrally with the hooks L, R16, 16A near the lower end so as to protrude toward the support piece 17 side. Further, springs 21 are attached to the right and left of the hooks L, R16, and 16A on the front and rear wall surfaces of the holder 13, respectively. The spring 21 has a leg portion with an inner angle of about 120 degrees around the winding portion 22 in the released state, and is fixed to the holder 13 with a screw 31 or the like at an inner angle of about 80 to 90 degrees when attached ( (See FIG. 10). This right end portion is locked by a locking pin 30 fixed to the holder 13. Further, the left end portion is formed with a locking portion 23 bent at a substantially right angle, and is locked to the hooks L, R16, 16A, and hooks are provided on the racks 8, 8 side fixed to the base 2. L, R16, 16A is energized, and the locking claws 19, 19 formed on the hooks L, R16, 16A are attached to the rack.toothIt plays a role of pressing and locking the 9, 9 portion (see FIG. 11). Then, the base spring 12 is supported upright in the recess formed in the base 2, and the support member 14 of the holder 13 is inserted into the support recess 4, and supported through the mounting hole drilled in the bottom surface of the support recess 4. The holder 13 is supported by the base 2 by fixing the screws 31 to the screw holes at the bottom of the member 14. The holder 13 is always urged upward on the base 2 by the base spring 12.
[0014]
  The operation handle 26 has a substantially inverted triangular front shape with a lower opening, a substantially rectangular planar shape, and a blind hole shaft hole 27 at a position opposite to the lower front and rear inner wall surfaces on the left side of the central portion having a horizontal plane portion. 27 is formed, and a convex portion for locking the handle spring 24 is formed at the center of the inner surface on the right side. Further, the front and rear inner wall surfaces facing the right side of the convex portion are formed to project from the upper end portion of the blade 25. An engagement member that slidably supports the engagement pieces 25a and 25a thus formed is formed. Unlocking members 28 and 28 as unlocking means RE are attached to the lower portions of the front and rear outer walls on the right side of the shaft holes 27 and 27 by screws 31 and 31 so as not to move. The unlocking member 28 is a small piece having a substantially rectangular front shape integrally formed of a metal or an elastic synthetic resin material. The mounting hole 28a is formed at one end, and a screw 31 and an adhesive are attached to the operation handle 26. It is fixed by using it together. A projecting piece 29 is formed on the rear surface (operation handle side) side of the other end (see FIG. 9). The projecting piece 29 is associated with an unlocking pin fixed to the hook.
[0015]
  The operation handle 26 is engaged with engagement pieces 25 a and 25 a at the upper end of the blade 25 by an engagement member formed to face the front and rear inner wall surfaces of the substantially central portion inside, and the holder 13 on the left side of the blade 25. The handle spring 24 is locked upright on the convex member formed on the inner bottom portion, and is further locked to the convex portion on the inner upper surface on the right side of the operation handle 26, and is formed on the front and rear outer wall surfaces on the right side of the holder 13. The support shafts 15 and 15 are engaged with shaft holes 27 and 27 formed in the front and rear inner wall surfaces on the left side of the operation handle 26 (see FIG. 5). Thus, the operation handle 26 is pivotally supported by the holder 13, and the operation handle 26 is always urged upward on the holder 13 by the handle spring 24.
[0016]
  Here, the staple type cassette C-type conventional stapler is described as an example. However, the labor saving mechanism of the present invention is also applicable to a conventional stapler other than the cassette type, and therefore the staple It is not limited to the cassette C type.
[0017]
  Next, the operation of the stapler 1 according to the configuration of the first embodiment of the present invention will be described.
[0018]
  First, in a standby state before an operation in which no pressure is applied to the operation handle 26 of the stapler 1 configured as described above, the hooks L, R16, which are pivotally supported on the holder 13 by the urging forces of the springs 21 and 21 fixed to the holder 13 are used. The locking claws 19, 19 of 16 A are provided on the racks 8, 8 fixed on the base 2.tooth9 and 9 are always locked (locked) (see FIG. 11A). Next, when a plurality of sheets P or the like are set on the upper surface of the base 2 and the operation handle 26 is pressed downward, the base spring 12 is less elastic than the handle spring 24, so that the holder 13 portion starts to descend (see FIG. 4). As a result, the hooks L, R16, 16A supported by the holder 13 are lowered.toothThe locking position moves below 9, 9 (see FIG. 11B). When the operation handle 26 is further lowered, the right end portion of the staple cassette C mounted on the holder 13 crushes a plurality of sheets of paper P, and further crushes so as to eliminate a gap between the sheets etc. The locking claws 19, 19toothThe base spring 12 and a plurality of sheets of paper P or the like P are blocked by locking (locking) below 9, 9 (see FIG. 4). Further, the operation handle 26 is pressed and lowered with a force exceeding the elastic force of the handle spring 24, whereby the blade 25 with the upper part engaged inside the operation handle 26 is guided by the guide member of the holder 13 and pushed downward. The leading staple in the staple cassette C is pushed out, and the tip of the leg that penetrates the plurality of sheets P is bent on the anvil 5 along the back surface of the sheets P so that the plurality of sheets P are bound. (See FIG. 11D). Immediately before the binding, the tips of the protrusions 29, 29 of the lock release members 28, 28 fixed to the operation handle 26 are inclined to the lock release pins 20, 20 fixed to the hooks L, R16, 16A. The vehicle rides over while being in contact with the surfaces 20a, 20a (see FIG. 11D). When the operation handle 26 is released and released, the operation handle 26 tends to return upward by the urging force of the handle spring 24. At this time, the protrusions 29 and 29 of the lock release members 28 and 28 pull up the lock release pins 20 and 20, so that the locking claws 19 and 19 of the hooks L, R 16 and 16 Atooth9 and 9 (see FIG. 11E), the holder 13 is also returned to the original standby position before the operation by the urging force of the base spring 12 (see FIG. 11F).
  Here, the staple staple cassette C type conventional stapler is described as an example, but the present invention is also applicable to a conventional stapler other than the cassette type, and in this case, the holder The paper 13 or the like P is pressed by the tip portion 13 but operates in the same manner as described above.
[0019]
Different Embodiments of the Invention
  Next, different embodiments of the present invention shown in FIGS. 12 to 16 will be described. In the description of the different embodiments of the present invention, the same components as those in the first embodiment of the present invention are denoted by the same reference numerals, and redundant description is omitted.
[0020]
  In the second embodiment of the present invention shown in FIGS. 12 to 16, the main difference from the first embodiment of the present invention is an unlocking member 26a which is the unlocking means RO, and the operation handle 26A. Accordingly, the support pins 17A are elongated by eliminating the release pins of the hooks L, R16B, and 16C attached to the holder 13A. Thus, the stapler 1A configured to use such unlocking members 26a, 26a and hooks L, R16B, 16C is formed in that the pressing piece 17a is formed by bending the upper end of the tip forward and projecting. In this case, the same effect as that of the first embodiment of the present invention can be obtained.
[0021]
  Next, the operation of the stapler according to the configuration of the second embodiment of the present invention will be described.
[0022]
  First, in the stapler 1A having the above-described configuration, in a standby state where the operation handle 26A is not pressed, the lock release members 26a and 26a formed to protrude downward from the lower front and rear wall surfaces of the operation handle 26A are provided on the front and rear outer wall surfaces of the holder 13. Since the pressing pieces 17a, 17a of the hooks L, R16B, 16C supported on the shaft are set to be pushed down slightly, the locking claws 19, 19 of the hooks L, R16B, 16C are in a standby state before the operation. Is the rack 8,8tooth9 and 9 (see FIG. 16A and FIG. 12). Next, when a plurality of sheets P or the like are set on the upper surface of the base 2 and the operation handle 26A is pressed downward, the base spring 12 is weaker in elasticity than the handle spring 24, but the operation is only a few millimeters. The handle 26A is also lowered. As a result, the unlocking members 26a, 26a of the operation handle 26A are separated from the pressing pieces of the hooks L, R16B, 16C, so that the hook 13A is held by the urging force of the spring 21 supported by the holder. The locking claws 19 of the hooks L, R16B, 16C pivotally supported on the rack 8 are fixed to the racks 8, 8 fixed on the base 2.tooth9 and 9 (see FIG. 16B). When the operation handle 26A is further lowered, the hooks L, R16B, 16C supported by the holder 13A are lowered.toothThe locking position moves below 9, 9 (see FIG. 16C). When the operation handle 26A is further lowered, the right end portion of the binding needle cassette C mounted on the holder 13 crushes a plurality of sheets of paper P, and further crushes so as to eliminate the gap between the sheets of paper P and the holder. 13 is not lowered, and at this time, the locking claws 19, 19 are attached to the racks 8, 8.toothThe base spring 12 and the repulsive force of a plurality of sheets of paper P are blocked by being locked below 9, 9 (see FIGS. 13 and 16C). Further, when the operating handle 26A is pressed and lowered with a force exceeding the elastic force of the handle spring 24, the blade 25 engaged at the upper part of the operating handle 26A is pushed down, and the leading staple in the staple cassette C is moved. The tip of the leg that is pushed down and penetrates the plurality of sheets P or the like is bent on the anvil 5 along the back surface of the sheet P or the like, and the plurality of sheets P or the like are bound. When the hand is released from the operation handle 26A after binding, the operation handle 26A first returns to a position in the middle of operation by the urging force of the handle spring 24 (see FIG. 16D). As a result, the unlocking members 26a and 26a of the operation handle 26A are pushed down by the pressing pieces 17a and 17a of the hooks L, R16B and 16C, and the locking claws 19 and 19 are attached to the racks 8 and 8, respectively.tooth9, the holder 13 is instantaneously returned to the original standby position before the operation by the biasing force of the base spring 12 (see FIG. 16 (e)).
[0023]
【The invention's effect】
  As is clear from the above description, the present invention has the following effects.
[0024]
  According to the first and second aspects of the present invention, as described above, instead of the base spring and the handle spring having the strong elastic force of the conventional stapler, a spring having a low elastic force is used, and a substantially rectangular parallelepiped is used. Multiple equally spaced vertical surfacestoothAnd a rack fixed upright on the upper surface of the substantially middle part of the base, andtoothAnd a hook that is pivotally supported by the holder and has an unlocking pin fixed to a substantially middle portion thereof, and urges the hook toward the rack side. In this way, a stapler is configured by a spring supported by the holder and a lock release member having one end fixed to the operation handle so as not to rotate and a projecting piece formed at the other end. When the downward pressing is released at the maximum lowering point of the operation handle after the binding needles are bound by the binding needle, the unlocking pin fixed to the hook is pulled up by the protruding piece formed on the unlocking member, and the rack oftoothSince the engagement between the hook and the hook claw is released, it is possible to press multiple sheets firmly on the top surface of the base with a considerably weaker force compared to the conventional stapler operation. It is possible to provide a stapler excellent in workability and operability that can be easily operated even by a weak woman or child while maintaining good and stable spelling quality.
[0025]
  According to the invention of claim 3, the point that the lock release member is formed as a lock release member that protrudes downward from the lower part of the front and rear wall surfaces to the left of the shaft hole of the operation handle, and the hook release pin is eliminated, Since the supporting piece of the hook is extended and the upper end of the hook is bent forward to form the protruding piece, the same effect as the structure of the first and second aspects can be obtained, and the number of parts can be reduced. Since the structure is reduced and the structure is simplified, the failure is reduced and the cost can be further reduced.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view showing a first embodiment of the present invention.
FIG. 2 is a plan view showing a main part in which a part of the embodiment is omitted.
FIG. 3 is a right side view of the same embodiment.
FIG. 4 is a front view illustrating a use state in which a sheet is pressed by the cassette front end according to the embodiment;
FIG. 5 is an exploded explanatory view of main members of the embodiment.
FIG. 6 is an explanatory diagram of a rack.
  a Front view
  b Plan view
7 is an explanatory diagram of a hook L. FIG.
  a Front view
  b Right side view
FIG. 8 is an explanatory diagram in which a part of the hook R is enlarged.
  a Front view
  b Left side view
FIG. 9 is an explanatory diagram of a lock release member.
  a Plan view
  b Front view
  c Left side view
FIG. 10 is an explanatory diagram of a spring.
  a Front view
  b Right side view
FIG. 11 is an explanatory diagram of a lock unit and a lock release unit according to the embodiment.
  (a) Standby state
  (b) A state where paper is pressed by the holder tip (cassette tip)
  (c) State where the operation handle is further pushed down from the state of (b)
  (d) When the operation handle is further pushed down and the projecting piece of the unlocking member gets over the unlocking pin of the hook just before the end of the spelling operation of the paper, etc.
  (e) The state where the spelling operation is finished and the operation handle is released, the protrusion of the unlocking member pulls up the unlocking pin of the hook, and the engagement between the rack and the hook is released
  (f) The state where the engagement between the rack and the hook is released and the holder and the operation handle are returning to the standby position.
FIG. 12 is a partially cutaway front view of a second embodiment of the present invention.
FIG. 13 is a front view illustrating a state where a sheet is pressed by the cassette front end according to the embodiment;
14 is an explanatory diagram of a hook L. FIG.
  a Plan view
  b Front view
  c Right side view
15 is an explanatory diagram of a hook R. FIG.
  a Plan view
  b Front view
  c Right side view
FIG. 16 is an explanatory diagram of a lock unit and a lock release unit according to the embodiment;
  (a) Standby state
  (b) The operation handle is slightly pushed down, the unlocking member of the operation handle is separated from the hook pressing piece, and the hook claw of the hook is engaged with the rack gear.
  (c) The state before and after the end of the spelling operation by further depressing the operation handle
  (d) State in which the spelling operation is completed and the operation handle is released, and the lock release member of the operation handle depresses the pressing piece of the hook to release the engagement between the rack and the hook.
  (e) When the rack and hook are disengaged, the holder and the operating handle are returned to the standby position.
FIG. 17 is a front view illustrating a conventional example.
[Explanation of symbols]
  1,1A stapler
  2 base
  3 Support members
  4 Support recess
  5 Anvil
  7 Top plate
  8 racks
  9 tooth
  10 Support piece
  11 Mounting hole
  12 Base spring
  13, 13A holder
  14 Support member
  15 Support shaft
  16, 16B hook L
  16A, 16C Hook R
  17, 17A support piece
  17a Pressing piece
  18 shaft hole
  19 Locking claw
  20 Unlocking pin
  20a inclined surface
  21 Spring
  22 winding part
  23 Locking part
  24 Handle spring
  25 blades
  25a Locking piece
  26, 26A Operation handle
  26a Unlocking member
  27 Shaft hole
  28 Unlocking member
  28a Mounting hole
  29 Projection
  30 Locking pin
  RO lock means
  RE unlocking means
  C Binding needle cassette
  P paper, etc.
  D Lowering of operation handle (pressed state)
  U Operation handle raised (pressing force released)

Claims (3)

A base provided with an anvil for folding a leg portion of a binding needle penetrating the paper or the like along a back surface of the paper or the like into a substantially flat state on a substantially flat upper surface on which a plurality of paper or the like is supported; A holder that is supported by the base and in which a loading portion for loading the binding needle is formed, and a blade for slidably mounting a leading needle of the binding needle stored in the loading portion; A base spring interposed between the holder and the base; an operation handle that is pivotally supported by the holder and engages with an upper end of the blade to drive the blade; and the operation handle and the holder A stapler having a handle spring interposed therebetween,
The elastic force of the base spring is suppressed and the holder is locked to the base so that the holder does not rise in the process of lowering the operation handle and completing the binding of the paper or the like with the staple. A stapler comprising: a lock unit; and a lock release unit that automatically releases the lock unit immediately after binding the paper or the like with the staple. The lock means and the lock release means have one end portion of a rack provided on the base having a plurality of teeth formed at equal intervals on one vertical surface of a substantially rectangular parallelepiped, and a locking claw meshing with the teeth of the rack. The hook is formed in the middle part and the other end is pivotally supported by the holder so that the other end is pivotally supported, and the hook is supported by the holder so as to always urge the hook toward the rack side. A spring and a lock release member having one end portion non-rotatably provided on the operation handle and a protruding piece formed on the other end portion, and the operation handle being fully lowered after binding the paper or the like with a binding needle When the downward pressing force is released at the point, the unlocking pin is pulled up by the projecting piece to release the engagement between the rack teeth and the hook claw, and return to the standby position before operation. Is configured to Stapler according to claim 1, characterized in that. The lock means and the lock release means have one end portion of a rack provided on the base having a plurality of teeth formed at equal intervals on one vertical surface of a substantially rectangular parallelepiped, and a locking claw meshing with the teeth of the rack. The other end of which is pivotally supported by the holder, a spring supported by the holder so as to constantly bias the hook toward the rack, and a lower part of the operation handle. An unlocking member formed at the same time, and at the maximum rising point of the operation handle at the standby position before the operation, the pressing piece of the hook is pressed downward, and the rack tooth and the hooking claw of the hook When the operation handle is pressed downward, the lock release member of the operation handle is separated from the pressing piece of the hook, so that the hook is urged by the spring and the hook is released. The hook of the hook engages with the teeth of the rack and is locked, and when the downward pressing of the operation handle is released after binding the paper or the like with the binding needle, the pressing piece of the hook is released by the unlocking member. 2. The structure according to claim 1, wherein when pressed downward, the engagement between the hooking claw of the hook and the teeth of the rack is released and the standby position before the operation is restored. stapler.

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