JPH0986088A - Loose-leaf binder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure blocking of binding rings and simplify a structure by forming a pressing section for pressing a circular arc section of a fixed base plate so as to prevent an axis from dislodging from a bearing in a state that the binding rings are blocked each other at a movable member. SOLUTION: A protrusion 17 forming a bearing recess 15 which is opened downward and shaped into an almost semi-circular cylindrical form is formed in a protruding manner to a movable base plate 3 from a fixed base plate 1. At a part of an inlet end part of the semi-circular cylindrical recess 15, a detent 23 of an axis 19 is protruded. The protrusion 17 is shaped like almost a letter U and its outside part forms a circular arc part 26 having a fixed thickness. On the movable base plate 3, the axis 19 to be fitted in the bearing recess 15 and a pressing section 27 which forms a part of the top face of the movable base plate are formed. In between them, a slot for receiving the circular arc section 26 of the protrusion 17 is formed. When the circular arc section 26 is inserted into the slot so as to fit the axis 19 in the recess 15, the pressing section 27 works on an external force to be exerted on the axis 19 vertically so as to dislodge the axis, and the axis 19 is always maintained in a regular position within a predetermined angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loose-leaf binding device, and more particularly, to a shaft provided with a fixed substrate and a movable substrate, each having a plurality of facing binding rings, at inner edges of the substrates facing each other in the longitudinal direction. The present invention relates to an improvement of a loose-leaf binding device of a type that pivots around.

[0002]

2. Description of the Related Art A fixed substrate and a movable substrate, each of which is provided with a plurality of facing binding rings, pivots about axes provided at the inner edges of the substrates facing each other in the longitudinal direction to form a binding ring. Loose-leaf binders of the open / close type are known. This type of binding device is advantageous in that the opening angle of the binding loop is large and loose leafs can be easily bound, and the large closing noise peculiar to the binding device that uses the elastic sheath for restraining the substrate is not generated. However, in general, this type of mechanism is complicated, and the manufacturing process is also complicated. There are some typical examples of this type, one is that a spring is provided on the shaft so as to constantly urge the movable substrate in the opening direction of the binding ring, while the binding ring is locked when the binding ring is closed. In this example, it is necessary to incorporate a spring at the time of assembly, the number of parts is increased, and an extra step is required for assembly, resulting in an increase in cost.
Further, the spring is made of steel, while the main body of the binding tool is made of a plastic material (strong material such as ABS), which makes recycling difficult. On the other hand, in a mold that does not use a spring, a slide bar or a plate having a cam protrusion that can move along the longitudinal direction of the fixed substrate is attached, and a cam groove is formed in a part of the movable substrate shaft to form the cam protrusion. The binding ring is opened and closed by sliding the child and the cam groove. But,
In this structure, since the shaft is thin, the cam action is not sufficient, the force for binding the binding ring is weak, and an extra slide rod is required.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a loose-leaf binding device which does not use a spring as in the prior art, has a small number of parts, is sure to close the binding ring, and has a simple structure. And That is, the loose-leaf binding device of the present invention has a plurality of binding rings formed along the outer edge so as to abut against the fixed substrate in which a plurality of binding rings are erected along the outer edge. A movable substrate, an arcuate portion that forms a substantially semi-cylindrical bearing recess that opens downward at one or more locations along the inner edge of the fixed substrate, and fits on the bearing along the inner edge of the movable substrate. The loose-leaf binding device including a shaft formed so as to fit and lock members provided at both ends in the longitudinal direction of the movable substrate is improved to achieve the above object and solve the above problem. According to the present invention, the movable member is formed with a holding portion for holding the arcuate portion of the fixed substrate so that the shaft does not come off the bearing when the binding rings are closed to each other. And
According to another feature of the present invention, an arcuate slot is formed between the shaft formed along the inner edge of the movable substrate and the holding portion, and thus formed along the inner edge of the fixed substrate. By fitting the arcuate portion formed in the slot into the slot, it is easy to assemble the two substrates, so that the shaft does not come out of the bearing recess in a predetermined pivot range of the movable substrate. According to still another feature of the present invention, a protrusion projecting toward the movable substrate is provided at one or more locations along the inner edge of the fixed substrate, and the movable substrate has a predetermined inner edge. It has a stop portion that abuts against the protrusion at an opening angle, thereby stopping the movable substrate at a predetermined opening angle. According to still another feature of the present invention, a plane facing the movable substrate is formed at one or more locations along the inner edge of the fixed substrate,
The inner edge of the movable substrate has a first surface that comes into contact with the flat surface when the binding ring is in the closed state and a second surface that contacts when the binding ring is in the open state. According to this feature, the movable substrate can be elastically moved to some extent to have a position for substantially maintaining the closed position of the binding ring and a position for substantially maintaining the open state of the predetermined angle, which facilitates replacement of the loose leaf. To do.

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The loose-leaf binding device of the present invention is made of the same strong plastic material such as ABS that does not use a metal spring, has a small number of parts, and has a reliable closure of the binding ring and a simple structure. It is a leaf binding. Referring to FIGS. 1 is a plan view of the loose-leaf binding device of the present invention, FIG. 2 is a side view, FIG. 3 is a bottom view, and FIG. 4 is an end view. The loose-leaf binding device is an elongated fixed substrate 1 in which a plurality of binding rings 5 are erected along the outer edge.
And a slender movable substrate 3 in which a plurality of binding rings 7 are formed along the outer edge so as to abut against the plurality of binding rings 5. Locking and operating members 9 and 11 pivotally attached by shafts 13 are provided at both ends of the movable substrate 3, respectively, and can be locked to the end portions of the fixed substrate 1. At four locations along the inner edge of the fixed substrate 1, there are formed protrusions 17 that project toward the movable substrate and that form a substantially semi-cylindrical bearing recess 15 that opens downward. These bearing recesses 15 are axially aligned. Further, shafts 19 that fit into the bearing recesses 15 are provided at four positions along the inner edge of the movable substrate 3, whereby the movable substrate 3 is pivotally attached to the fixed substrate 1. In the above configuration, in order to open and close the binding rings 5 and 7 with respect to each other, first, in FIG. 1, the lock and operation members 9 and 11 at both ends are pulled outward with fingers and pivoted around the shaft 13 to be fixed. Release the lock from the locking piece 21 at the end of the member to release the lock. Next, the lock / operation member 9 on the front side is rotated to the right around the shaft 19 with a finger to pivot the movable substrate 3 to open the binding ring 7. As mentioned above,
The binding devices of the present invention are all made of the same material and do not use metal springs or cams.

Next, a detailed structure relating to the features of the present invention will be described. 5 is a sectional view taken along the line AA of FIG. 3 showing a portion where the movable substrate 3 is pivotally attached to the fixed substrate 1, and exploded views of the same portion are shown in FIGS. 6, 7, 8 and 9. Since the other three pivotally-attached portions along the inner edge of the fixed substrate 1 have the same dimensions except for the dimension in the longitudinal direction, a description thereof will be omitted. Fixed board 1
A protrusion 17 that forms a substantially semi-cylindrical bearing recess 15 that opens downward is formed so as to project toward the movable substrate 3. A shaft 19 is provided at a part of the inlet end of the semi-cylindrical recess 15.
The detent 23 of is projected. FIG. 7 shows the state where the protrusion 17 is viewed from the right side of FIG. 6, but the notch 25 may be omitted. The protrusion 17 has a substantially U shape as shown in FIG.
The outer portion forms an arcuate portion 26 having a constant wall thickness.
As shown in FIGS. 8 to 9, the bearing recess 1 is formed in the movable substrate 3.
A pressing portion 27 that forms a part of the upper surface of the movable substrate and the shaft 19 that fits into the shaft 5 are formed, and a slot that receives the arc-shaped portion 26 of the protrusion 17 is formed between them. For this reason,
Insert the arc top 26 into this slot to insert the shaft 19 and recess 1
When 5 is fitted, the holding portion 27 acts on the external force applied to remove the shaft perpendicularly to the shaft 19, and the shaft 19 is always held in the regular position within the predetermined pivot angle. You can According to this structure, it is extremely easy to incorporate the movable substrate 3 into the fixed substrate 1. That is, as described above, the arcuate portion 26 of the fixed substrate 1 may be inserted between the shaft 19 and the holding portion 27 of the movable substrate, and the shaft 19 and the bearing recess 16 may be fitted together. When assembled in this manner, when the binding rings 5 and 7 are closed to each other, the shaft 19 and the pressing portion 27 act on the bearing recess 16 and the outer surface of the arc-shaped portion 26 so that the binding rings are perfectly aligned.

Next, FIG. 1 is a sectional view taken along line BB in FIG. 3 showing a stopper structure for stopping the movable substrate at a predetermined angle.
0 to 11 and exploded views of FIGS. 12, 13, 14, 1
5 and 16. The stopper structures 30 are provided at two locations along the inner edges of both substrates, but one or more stopper structures 30 can be used. A stop protrusion 28 protruding toward the movable substrate 3 is provided on the inner edge of the fixed substrate 1, and the stop protrusion 28 is provided on the inner edge of the movable substrate 3 at a predetermined opening angle.
Has a stop portion 29 that abuts against each other, so that the abutment surface 31 of the stop projection 28 and the abutment surface 33 of the stop portion 29 of the movable substrate abut each other at a predetermined opening angle to stop. There is. This opening angle is set to an angle at which the binding ring can be fully opened as shown in FIG. 11 and the loose leaf can be easily inserted or replaced.

Reference is now made to FIGS. 17-18, which is a sectional view taken along the line CC of FIG. 3, showing a mechanism 35 for elastically determining the two preferential positions of the movable substrate. The mechanism 35 is provided at one place along the inner edges of the substrates 1 and 3, but may be provided at a plurality of places. A short rectangular protrusion 37 protrudes from the fixed substrate 1 toward the movable substrate 3 to form a flat surface 38 facing the movable substrate 3. The inner edge of the movable substrate 3 contacts the flat surface 38 when the binding ring is closed. A second surface 43 is formed which is in contact with the first surface 41 when the binding ring is in the open state. According to this feature, when the movable substrate 3 is opened and closed, the movable substrate 3 is elastically moved to some extent to substantially maintain the closed position of the binding ring (FIG. 17).
And a position (FIG. 18) that substantially maintains the open state at a predetermined angle, facilitating replacement of loose leaf. As shown in FIG. 19, this mechanism is formed to be relatively short in the longitudinal direction so that the resistance during opening and closing does not become too large.

Next, the lock / operation member 9 will be described. Since the lock / operation member 11 is formed symmetrically, its description is omitted. Reference is made to FIGS. The locking piece 21 projects from the end of the fixed substrate 1 in the longitudinal direction. The lock / operation member 9 is formed with a recess having a wall 45 that engages with the engagement piece 21, and a finger rest 4 is provided at the end portion in the longitudinal direction.
7 projects upward. A rectangular plate portion 49 projects from the end of the movable substrate 3 in the longitudinal direction, and this plate extends toward the fixed substrate 1. A shaft hole that supports the shaft 13 is formed in the plate portion 49. When the binding ring is closed as indicated by the solid lines in FIGS. 21 to 22, the movable substrate does not move in any direction even when an external force is applied, as described above. To rotate the movable substrate to release the binding ring, in FIG. 21, the lock / operation member 9 is opened with a finger to the chain line position (9 ′), and then the movable substrate 3 is rotated right about the shaft 19.

[0009]

[Operation and Effect] Next, the assembly method will be described. Figure 6
9 to 9, the arcuate portion 26 of the fixed substrate 1 is inserted between the shaft 19 and the holding portion 27 of the movable substrate, and the shaft 19 and the bearing recess 1 are inserted.
Fit 6 together. When assembled in this manner, when the binding rings 5 and 7 are closed to each other, the shaft 19 and the pressing portion 27 act on the bearing recess 16 and the outer surface of the arc-shaped portion 26 so that the binding rings are perfectly aligned. This state is completely maintained from the closed state to the open state where the stopper structure 30 operates. When the lock / operation members 9 and 11 are closed as shown in FIGS. 1 and 21, the closed state of the binding ring is completely maintained. Next, in order to open the binding ring from the closed state, in FIGS. 1 and 21, the finger hook 47 of the locking and operating member 9 is pulled forward to pivot the locking and operating member 9 around the shaft 13. Move it to unlock. Similarly, the lock / operation member 11 is also removed. Then, the lock / operation member 9 is rotated around the shaft 19 in FIG. At that time, as shown in FIGS. 18 to 19, the first surface 41 of the movable substrate 3 is in contact with the flat surface 38 formed on the inner edge portion of the fixed substrate 1, but if it is forcibly rotated, the elasticity of the substrate (the shaft 19 Occurs due to the fact that they are engaged with and constrained in the bearing recess), and elastically moves to the second surface 43, and at that position, as shown in FIGS. Since the abutment surface 31 of the stop portion 29 of 28 and the abutment surface 33 of the stop portion 29 abut each other to stop the movable substrate and stabilize the elastic substrate within the elastic range, the loose leaf can be easily inserted and removed. Become. Even if it is forcibly released, the movable substrate returns to this position due to the elasticity. On the contrary, when the movable substrate 3 is pivoted in the opposite direction, the movable substrate 3 elastically moves to substantially maintain the closed position within the elastic range of the closed position of the binding ring, and the lock / operation members 9 and 11 are not moved. Loose leaf can be temporarily held between closing and locking.

[Brief description of drawings]

FIG. 1 is a plan view of a loose-leaf binding device of the present invention.

FIG. 2 is a side view of the loose-leaf binding device of the present invention.

FIG. 3 is a bottom view of the loose-leaf binding device of the present invention.

FIG. 4 is an end view of the loose-leaf binding device of the present invention.

FIG. 5 is an enlarged sectional view taken along line AA of FIG. 3;

6 is an enlarged cross-sectional view of the fixed substrate of FIG.

FIG. 7 is a right side view of the fixed substrate of FIG.

8 is an enlarged cross-sectional view of the movable member in FIG.

9 is a left side view of the movable member in FIG.

10 is an enlarged cross-sectional view taken along line BB of FIG.

11 is a view in which the binding loop is opened in FIG.

12 is an enlarged cross-sectional view of the fixed substrate of FIG.

13 is a plan view of a protrusion of the fixed substrate shown in FIG.

FIG. 14 is a right side surface portion of a protrusion of the fixed substrate of FIG.

15 is an enlarged cross-sectional view of the movable member in FIG.

16 is a left side view of a stop portion of the movable member in FIG.

17 is an enlarged cross-sectional view taken along the line CC of FIG.

FIG. 18 is a cross-sectional view in which the movable member of FIG. 17 is opened.

FIG. 19 is a right side view of the fixing member of FIG.

FIG. 20 is a plan view of the lower end portion of the binding device.

21 is a right side view of FIG. 20. FIG.

22 is an end view of FIG. 20. FIG.

[Explanation of symbols]

 1: Fixed board 3: Movable board 5, 7: Binding ring 9, 11: Lock and operation member 13: Shaft 15: Bearing recess 17: Projection 19: Shaft 21: Locking piece 23: Detent 25: Notch 26 : Arc-shaped portion 27: Pressing portion 29: Stop portion 30: Stopper structure 29: Stop portion 33, 34: Abutting surface 35: Mechanism for elastically determining two positions 37: Rectangular protrusion 38: Flat surface 41: First Surface 43: Second surface 47: Wall 47: Finger rest 49: Plate part

Claims (4)

[Claims] 1. A fixed substrate having a plurality of binding rings standing upright along an outer edge, a movable substrate having a plurality of binding rings formed along the outer edge so as to abut against the plurality of binding rings, and the fixed member. A protrusion that forms a substantially semi-cylindrical bearing recess that is open downward at one or more locations along the inner edge of the substrate, and is formed to fit the bearing along the inner edge of the movable substrate. In a loose-leaf binding device comprising a shaft and lock members provided at both ends in the longitudinal direction of the movable substrate, the movable member has the binding rings closed to each other,
The loose-leaf binding device is characterized in that a pressing portion that presses the protrusion of the fixed substrate is formed so that the shaft does not come off the bearing. 2. The protrusion formed along the inner edge of the fixed substrate is formed in an arc-shaped slot formed between the shaft formed along the inner edge of the movable substrate and the holding portion. The loose-leaf binding device of claim 1, wherein the loose-leaf binding device has a fitting arcuate shape so that the shaft does not disengage from the bearing recess within a predetermined pivot range of the movable substrate. 3. The movable substrate is formed along the inner edge of the movable substrate and has stop protrusions projecting toward the movable substrate at one or more locations along the inner edge of the fixed substrate. The loose-leaf binding device according to claim 1 or 2, further comprising: a stop portion that abuts against the stop protrusion at an opening angle of, thereby stopping the movable substrate at a predetermined opening angle. 4. A flat surface facing the movable substrate is formed at one or more locations along the inner edge portion of the fixed substrate, and the inner edge of the movable substrate contacts the flat surface when the binding ring is in a closed state. The loose-leaf binding device according to any one of claims 1 to 3, further comprising a second surface that is in contact with the first surface when the binding ring is in an opened state.