JP3646564B2 - Clip machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a clip machine that binds a paper bundle or the like while extruding a clip folded in a folded state, and more specifically, in the clip machine, damage to a leaf spring that spreads the folded ends of the clip. The present invention relates to a clip machine that prevents and increases durability.
[0002]
[Prior art]
Japanese Laid-Open Patent Publication No. 9-99682 and Utility Model Registration No. 2530157 are available for manual clip machines.
[0003]
Japanese Patent Laid-Open No. 9-99682 relates to “a plate spring for expanding a clip to be attached to a clip pinching device”.
[0004]
FIG. 9 shows a “clip clamping device” disclosed in Japanese Patent Laid-Open No. 9-99682, and the clip 3 shown in FIG. 10 can be stored inside the case 2 of the clip clamping device 1. A clip insertion opening 4 is formed at one end of the case 2, and a paper bundle insertion opening 5 is formed at the other end of the case 2. A slider 6 is disposed on the upper portion of the case 2. When the slider 6 is slid from the clip insertion port 4 side toward the paper bundle insertion port 5 side, the clip 3 moves from the clip insertion port 4 to the paper bundle insertion port 5 side. It is like that.
[0005]
Guide grooves for guiding the ears 7 of the clip 3 are formed on the left and right side wall portions of the inner surface of the case 2, and the sideways substantially Y-shaped clip is expanded at the end of the guide groove on the paper bundle insertion port 5 side. A plate spring 8 is provided.
[0006]
When the clip 3 slides inside the guide groove and reaches the bent portion 9 of the leaf spring 8, the edge of the notch 10 near the bent portion 9 enters between the ear portions 7 and 7. When the clip 3 moves to the paper bundle insertion opening 5 side, the clip 3 is expanded by the leaf spring 8 sandwiching the paper bundle, and when the ear portion 7 of the spread clip 3 passes the end of the leaf spring 8, The clip 3 is a bundle of paper.
[0007]
As shown in FIG. 10, the leaf spring 8 is formed by bending a long and narrow metal plate around a fold line extending in the width direction at the center, and then inclining both side portions in the up and down oblique directions, and the side surface is substantially Y. The shape is a letter or a substantially V shape, and the bent portion 9 is bent into a cylindrical shape.
[0008]
FIG. 11 shows an expansion spring of utility model registration No. 2530157, and this expansion spring 11 is provided with a bent portion 12 so as to cross the central portion of the elongated metal plate 11, and a part of the bent portion 12 is shown. The radius of curvature is larger than the apex portion 14 in which 13 is folded flat.
[0009]
[Problems to be solved by the invention]
However, in Japanese Patent Application Laid-Open No. 9-99682, the cylindrical bent portion 9 of the leaf spring 8 secures the elastic force of the leaf spring 8. Therefore, if the width of the leaf spring 8 is reduced, the elastic force is lost and fatigue is accumulated. Easy to damage. Moreover, although the ear | edge parts 7 and 7 of the clip 3 pass the notch 10 side, when the width | variety of the notch 10 is small, the force which elastically deforms the leaf | plate spring 8 will become inadequate, and it will become easy to deform only an edge part. At the same time, the ears 7, 7 may abut against the cylindrical bent part 9 and the clip 3 may not be pushed out.
[0010]
Therefore, the leaf spring 8 is enlarged because the notch 10 has a sufficient width to allow the ears 7 and 7 to pass therethrough and the bent portion 9 needs to have a sufficient width. There's a problem.
[0011]
Further, in the utility model registration No. 253017 of FIG. 11, the bent portion 12 has a portion 13 having a large radius of curvature and a vertex portion 14 folded almost flat, but when the expansion spring 11 is elastically deformed, the bent portion 12 becomes flat. Since stress at the time of deformation of the expansion spring concentrates on the folded vertex portion 14, fatigue damage to the vertex portion 14 cannot be sufficiently prevented.
[0012]
Furthermore, if pressing is performed so that the portion 13 having a large radius of curvature and the flat apex portion 14 coexist in a narrow range such as the bent portion 12, an excessive deformation force acts on the apex portion 14, so that it is easy to bend. There is a problem that processing is difficult and expensive.
[0013]
The present invention has been made paying attention to such a problem, and when binding a paper bundle or the like with a clip, the width of the bent portion of the leaf spring for expanding the clip can be formed small, It is an object of the present invention to provide a clip machine that is durable and resistant to damage due to fatigue accumulation of elastic deformation, is easy to process a leaf spring, is not expensive, and is advantageous for downsizing.
[0014]
[Means for Solving the Problems]
In order to solve the above-described problem, a clip machine according to claim 1 of the present invention provides:
It is a clip machine that sends out clips for binding paper bundles, etc.
In the clip, the center part of the elongated metal piece in which small protrusions are formed on the long side of the four corners, the edge parts on the short side of the metal piece and the small protrusions overlap, and the short side Are bent so that the edge portions of each other and the small protrusions are pressed against each other,
The cylindrical case for storing the clip has a paper bundle insertion port for inserting the paper bundle in the left and right side wall portions at one end, and the longitudinal direction of the case on the inner wall of the left and right side wall portions of the case And a guide groove for guiding the small protrusion of the clip is formed, and an end portion of the guide groove on the paper bundle insertion port side is an enlarged portion that extends above and below the paper bundle insertion port,
A leaf spring that is inserted between a pair of upper and lower small protrusions of the clip and pushes end edges on the short side of the clip to the enlarged portion is disposed,
The leaf spring includes a flat portion disposed on the enlargement start portion side by overlapping a pair of elongated elastic pieces on two sheets so as to be inserted between the pair of small protrusions of the clip, and the paper bundle insertion port. In a clip machine composed of a flexible piece portion that extends along the enlarged portion from the enlargement start portion so as to be disposed on the side and sandwich the paper bundle,
The leaf spring is connected to the connecting portion such that one end portions of a pair of elongated elastic pieces arranged in parallel are connected by a connecting portion extending in the longitudinal direction of the elastic piece, and the pair of elastic pieces overlap each other. Formed by folding along,
The connecting portion side is the flat portion fixed to the expansion start portion, and a portion extending from the connecting portion along the expanding portion is the flexible piece portion.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a clip machine according to an embodiment of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 conceptually shows an arrangement state of leaf springs and clips in a clip machine according to an embodiment of the present invention, and FIG. 2 shows an unfolded shape of the leaf spring of FIG. 1 before bending. 3 to 7 schematically show the configuration of the clip machine of FIG. 1, and FIG. 8 shows a developed shape of the clip stored in the clip machine.
[0017]
As shown in FIG. 8, the clip 20 is formed with small protrusions 22 for locking on the long sides of the four corners of the elongated rectangular metal piece 21, and the central portion of the rectangular metal piece 21 is connected to the upper and lower small protrusions 22, The folds are folded around a fold line 24 extending in the width direction so that the 22 overlap each other and the edge portions 23 near the short sides are pressed against each other. In the end edge 23, a bent ridge line portion 25 extending in the width direction of the rectangular metal piece 21 is formed at the center of the pair of small protrusions 22, and the bent ridge line portions 25 are pressed against each other so as to grip the paper bundle. To touch. In the present invention, the end edge portion 23 includes a pair of small protrusions 22 and a bent ridge line portion 25 in addition to the short side.
[0018]
As shown in FIG. 4, the clip machine 26 has a cylindrical case 27 in which a plurality of clips 20 are accommodated, and an opening 28 is formed in the upper surface portion 27 </ b> A of the case 27. A slider 29 is attached to the opening 28, and the slider 29 pushes the clip 20 accommodated in the case 27 toward the paper bundle insertion port 30 (see FIG. 5).
[0019]
As shown in FIGS. 5 and 6, the slider 29 has an extrusion portion 32 that pushes out the rear portion of the clip 20 at the lower portion of the plate-like base 31, and an input portion 33 that presses with a finger on the upper portion of the base 31. Is formed. Horizontal wings 34 are respectively formed on the left and right of the rear part of the base 31, and the horizontal wings 34 are guided by an upper surface part 27A of the case 27 and a guide plate part 35 formed on the upper part of the inner surfaces of the left and right side walls. Further, the extrusion portion 32 is formed in a substantially wedge shape, and horizontal wing portions 36 are respectively formed at the lower portions of the left and right side portions of the extrusion portion 32. The horizontal wing portion 36 is located below the guide plate portion 35 and can lift the extrusion portion 32 side of the base 31. When the pushing portion 32 of the base 31 is lifted, the slider 29 can move over the triangular bent portion of the clip 20 and move backward.
[0020]
A clip storage opening 36 for storing the clip 20 is formed at the rear of the upper surface of the case 27, and a clip insertion guide plate 37 for guiding the clip 20 is formed at the rear edge of the clip storage opening 36. Has been.
[0021]
The inside of the case 27 is formed in a cylindrical shape so as to accommodate the clip 20, and the paper bundle insertion port 30 is formed horizontally at the front end portion of the case 27. A guide groove 38 is formed on each of the left and right inner wall surfaces of the case 27. The guide groove 38 guides the clip 20 to move horizontally by positioning the small protrusions 22 on the left, right, top, and bottom of the clip 20 in the guide groove 38.
[0022]
As shown in FIG. 5, the guide groove 38 is formed so that the clip housing opening 27 becomes narrower toward the bottom side of the case 27. Further, an enlarged portion 39 that gradually widens toward the paper bundle insertion port 30 is formed in the vicinity of the paper bundle insertion port 30 in the guide groove 38. In the vicinity of the expansion start portion 40 of the expansion portion 39, the guide groove 38 rises from the case 27 bottom side. The rising taper portion 41 immediately before the expansion start portion 40 lifts the end edge portion 23 of the tip of the clip 20, and the front end portion 43 of the leaf spring 42 of the expansion portion 39 is located between the upper and lower small protrusions 22, 22. To position.
[0023]
As shown in FIG. 1, the leaf spring 42 is formed by connecting a pair of elongated rectangular elastic pieces 43, 43 made of metal at a connecting portion 44. That is, as shown in FIG. 2, the leaf spring 42 has a developed shape in which one end portions on the long side of the pair of elongated rectangular elastic pieces 43, 43 are connected by the connecting portion 44.
[0024]
The leaf spring 42 is folded at the connecting portion 44 so that the pair of rectangular elastic pieces 43, 43 overlap each other to form a flat portion 45, and the end on the opposite side of the connecting portion 44 is used as a guide surface of the enlarged portion 39. A flexible piece 46 is formed so as to extend along.
[0025]
When the leaf spring 42 is folded, the center line 44A along the longitudinal direction of the connecting portion 44 is the folding center. In the folding of the connecting portion 44, the thickness of the connecting portion 44 when folded is formed to be thicker than the flat portion 45 obtained by adding the thicknesses of the two rectangular elastic pieces 43. For example, it is set to about 2.5 to 5 times.
[0026]
The leaf spring 42 is fixed by the connecting portion 44 being embedded in the bottom of the guide groove 38. A locking hole 47 for fixing the leaf spring 42 is opened in the flat portion 45. In the deformed portion 45, a mounting groove (not shown) having a width corresponding to the thickness of the two elastic pieces 43 formed in the guide groove 38 is press-fitted and fixed, and a hook-shaped protrusion (not shown) in the mounting groove is inserted into the locking hole. Is permanently locked. When the leaf spring 42 is inserted into the narrow mounting groove, the flat spring portion 45 is thicker than the two elastic pieces 43, 43, so that the leaf spring 42 is press-fitted into the mounting groove. An adhesive capable of bonding plastic and metal may be used when the connecting portion 44 of the leaf spring 42 is mounted. The leaf spring 42 and the case 27 may be integrally formed by insert molding.
[0027]
Since the end portions of the elastic pieces 43, 43 that are folded and overlapped with each other protrude from the center portion of the expansion start portion 40, the flat spring 42 is flattened when the clip 20 is pushed by the slider 29 and moves forward. 44 enters the pair of end portions 23, 23.
[0028]
Further, since the paper bundle insertion port 30 is positioned between the end portions of the leaf spring 42 on the paper bundle insertion port 30 side, the clip 20 is further fed from the enlargement start unit 40 to the paper with the paper bundle 48 inserted. When slid toward the bundle insertion opening 30, the leaf spring 42 bends with the paper bundle 48 sandwiched by the elastic force of the flexible piece portions 46, 46 of the clip 20.
[0029]
Further, when the small protrusion 22 passes through the end portions of the flexible piece portions 46 and 46 of the leaf spring 42, the flexible piece portions 46 and 46 of the leaf spring 42 return to the original shape along the guide surface 39A of the enlarged portion 39, The edge portion 23 of the clip 20 sandwiches the paper bundle 48.
[0030]
According to the clip machine 26 of this embodiment, the leaf spring 42 is connected to one end portions of a pair of elongated rectangular elastic pieces 43 arranged in parallel by the connecting portion 44 extending in the longitudinal direction of the rectangular elastic pieces 43. The pair of rectangular elastic pieces 43 are formed by folding along the connecting portion 44 so that the pair of rectangular elastic pieces 43 and 43 overlap each other. The pair of leaf springs 42 are expanded to the left and right guide grooves 38 because the connection portion 44 is expanded toward the other end portion of the rectangular elastic piece 46 so as to spread from the start portion 40 side to the paper bundle insertion port 30. In the case of arranging and fixing to the portion 39, if the connecting portions 44 are arranged facing each other, the small protrusion 22 of the clip 20 fed to the paper bundle insertion port 30 side causes the connecting portions 44 of the pair of leaf springs 42 to be connected. Pass the paper bundle 48 The bunch.
[0031]
Further, when the pair of leaf springs 42 are arranged so that the connecting portion 44 is positioned outside the pair of guide grooves 38, the small protrusion 22 of the clip 20 fed to the paper bundle insertion port 30 side is connected to the connecting portion 44. It passes through the free end side located on the opposite side of.
[0032]
When the pair of upper and lower small protrusions 22 and 22 of the clip 20 pass through the leaf spring 42 while sandwiching the paper bundle 38, the connecting portion 44 of the leaf spring 42 generates stress at the time of deformation. 44 extends in the longitudinal direction of the leaf spring 42, so that a region subjected to stress can be set large without increasing the width of the leaf spring 42, durability against deformation fatigue accumulation is improved, and fatigue damage is sufficient. Can be prevented.
[0033]
Further, since the thickness of the leaf spring 42 is substantially the thickness of two leaf springs over the entire width of the leaf spring 42, when the pair of small protrusions 22, 22 sandwich the leaf spring 42, The passage area in the width direction of the protrusions 22 and 22 can be widened.
[0034]
Therefore, the positional accuracy of the clip 20 in the left-right direction is relaxed, the slide resistance of the clip 20 is reduced, and the clip 20 can be sent out to the paper bundle insertion port 30 with a light force.
[0035]
This is because, in order for the small protrusions 22 and 22 on the left and right and top and bottom of the clip 20 to pinch the leaf spring 42 accurately, it is necessary to match the passage area of the small protrusions 22 and 22 of the clip 20 with the passage area of the leaf spring 42 with high accuracy. However, if this is made highly accurate, the catch when the small protrusion of the clip 20 comes into sliding contact with the bottom of the guide groove 38 becomes large.
[0036]
However, in this embodiment, since the positional accuracy of the clip 20 in the left-right direction is relaxed, the catch of the clip 20 is reduced, and the processing of the leaf spring 42 is easy.
[0037]
Since the connecting portion 44 of the leaf spring 42 is bent so as to have a thickness larger than the thickness of the flat portion 45 in which the two rectangular elastic pieces 35 are overlapped, the stress at the time of deformation of the leaf spring 42 is a specific narrowness. It does not concentrate on the region, and damage due to fatigue accumulation of the leaf spring 42 is less likely to occur and durability is improved.
[0038]
Since the connecting portion 44 of the leaf spring 42 is fixed to the bottom side of the guide groove 38, when the upper and lower small protrusions 22 and 22 sandwich the leaf spring, the leaf spring 42 is easily sandwiched. Since the force between the two members 22 sandwiching the leaf spring 42 is not directly input to the connecting portion 44, a large deformation force does not act on the connecting portion 44, and the durability of the leaf spring 42 is improved.
[0039]
In the above embodiment, the manual operation type clip machine 26 has been described. However, such a clip machine 26 is provided, for example, in a sorter of a copying machine, a tray of a facsimile, or a tray of a printer, and a predetermined number of copies are completed. Alternatively, it may be bound by the clip 20 every time a fax is received or every time a predetermined number of prints are completed by the printer. In that case, the actuator is driven based on the signals of copy completion, reception completion, and printing completion so that the slider 23 of the clip machine 26 is driven by an actuator such as a motor or an air cylinder, and the paper bundle 38 is bound by the clip 20. .
[0040]
【The invention's effect】
According to the clip machine of the clip machine of claim 1 of the present invention, when the pair of upper and lower small protrusions of the clip pass through the leaf spring with the sheet bundle interposed therebetween, the connection portion of the leaf spring is not deformed. However, since the connecting part extends in the longitudinal direction of the leaf spring, it is possible to set a large area to receive the stress without increasing the width of the leaf spring, improving durability against fatigue accumulation of deformation. In addition, fatigue damage can be sufficiently prevented.
[0041]
Further, since the thickness of the leaf spring is the thickness of two elastic pieces over almost the entire width of the leaf spring itself, when the pair of small protrusions sandwich the leaf spring, the pair of small protrusions sandwich the leaf spring. Since the attachment area can be widened, the positional accuracy of the clip in the left-right direction is relaxed, the catching resistance of the clip is reduced, and the clip can be sent out with a light force.
[0042]
Further, the leaf spring connects a pair of elongated elastic pieces arranged in parallel to each other by a connecting portion extending in the longitudinal direction of the elastic pieces, and the pair of elastic pieces overlap each other. Is folded along the connecting portion, so that processing of the leaf spring is easy.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing an arrangement state of leaf springs of a clip machine according to an embodiment of the present invention. FIG. 2 is a development view showing an unfolded shape of the leaf spring of FIG. 1 before bending. FIG. 4 is a plan view of a clip machine having a leaf spring. FIG. 4 is a plan view of the clip machine of FIG. 1. FIG. 5 is a longitudinal sectional view of the clip machine having the leaf spring of FIG. 6 is a plan view of the slider of the clip machine. FIG. 7 is a view of the clip machine when viewed from the front side. FIG. 8 is a developed view showing the developed shape of the clip. FIG. 10 is a view showing a positional relationship between a leaf spring provided in the clip machine of FIG. 9 and a clip. FIG. 11 is a view of another conventional leaf spring.
20 Clip 22 Small protrusion 23 Edge portion 29 Slider 30 Paper bundle insertion port 38 Guide groove 39 Enlarged portion 42 Leaf spring 44 Connecting portion 45 Flat portion 46 Flexible piece portion

Claims (1)

It is a clip machine that sends out clips for binding paper bundles, etc.
In the clip, the center part of the elongated metal piece in which small protrusions are formed on the long side of the four corners, the edge parts on the short side of the metal piece and the small protrusions overlap, and the short side Are bent so that the edge portions of each other and the small protrusions are pressed against each other,
The cylindrical case for storing the clip has a paper bundle insertion port for inserting the paper bundle in the left and right side wall portions at one end, and the longitudinal direction of the case on the inner wall of the left and right side wall portions of the case And a guide groove for guiding the small protrusion of the clip is formed, and an end portion of the guide groove on the paper bundle insertion port side is an enlarged portion that extends above and below the paper bundle insertion port,
A leaf spring that is inserted between a pair of upper and lower small protrusions of the clip and pushes end edges on the short side of the clip to the enlarged portion is disposed,
The leaf spring includes a flat portion disposed on the enlargement start portion side by overlapping a pair of elongated elastic pieces on two sheets so as to be inserted between the pair of small protrusions of the clip, and the paper bundle insertion port. In a clip machine composed of a flexible piece portion that extends along the enlarged portion from the enlargement start portion so as to be disposed on the side and sandwich the paper bundle,
The leaf spring is connected to the connecting portion such that one end portions of a pair of elongated elastic pieces arranged in parallel are connected by a connecting portion extending in the longitudinal direction of the elastic piece, and the pair of elastic pieces overlap each other. Formed by folding along,
The clip machine, wherein the connecting portion side is the flat portion fixed to the expansion start portion, and a portion extending from the connecting portion along the expanding portion is the flexible piece portion.

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