JPH0529905Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present application relates to a paper clipper for holding documents and the like.

BACKGROUND ART Conventionally, a lower arm and a front arm of a crankshaft are inclined downward and parallel to each other at a slight angle with respect to the horizontal plane of a base plate, and the front arm is penetrated through a side wall of a holding member. At the same time, a shaft is cut and raised between the claw plate and the wall plate at the center of the base plate, and the base end of the handle is rotatably attached to this shaft, and a torsion coil spring is inserted into the shaft, and one end of this coil spring The other end of the coil spring is bent into a crank shape, and the tip extending outward from the middle arm of the crank part is attached to the presser member, and the handle is fixed to the coil spring. In a paper clamp configured to sandwich paper between a base plate and a holding member by pushing down against The front arm is tilted downward at a slight angle, and the lower edge of the outer wall of the presser member is slightly lower than the lower edge of the inner wall by penetrating the front arm through the side wall of the presser member. A structure in which paper sheets are more strongly clamped by the lower edge of the wall is known, for example, from Utility Model Showa No. 59-25679.

Problems to be Solved by the Invention By the way, in the conventionally known configuration described above, when the handle is rotated, the lower edge of the outer wall of the presser member first comes into pressure contact with the paper sheet, and then the lower edge of the inner wall comes into pressure contact with the paper sheet, but since the axis of the coil spring, the middle arm, and the front arm are on the same plane, a torsional force is applied to the middle arm of the coil spring as the presser member presses, and this torsional force This tends to weaken the pressing force on the lower edge of the outer wall of the pressing member because the tip of the forearm lifts up, and this tendency increases as the thickness of the sheet to be gripped increases. There was an inconvenience that the power was reduced.

Furthermore, with the conventional configuration, when the middle arm is raised to clamp a piece of paper and the pressure member is raised, and an external force is applied, such as by a hand touching it, the middle arm of the coil spring, which is in an unloaded state, can easily fall down due to the weight of the pressure member, causing the pressure member to drop inadvertently, making it difficult to handle.

Means for Solving the Problems Accordingly, the present invention provides a method in which, by rotating a handle, a presser member having a downward U-shaped cross section supported by a crankshaft is lowered against a coil spring, and the base plate and the presser member are separated from each other. In the paper clipping tool configured to hold a paper sheet between the coil springs, when the middle arm of the coil spring is in an upright state, the front arm thereof is tilted in the front direction of the pressing member;
In addition, the above-mentioned disadvantages of the conventional paper clipping tool are solved by providing a paper clipping tool in which the hole through which the front arm of the holding member is inserted is elongated in the longitudinal direction of the holding member.

Function When holding a sheet of paper, as in the past, place the sheet on the base plate and then rotate the handle in the direction in which the presser member descends.
The presser member descends together with the front arm as the middle arm of the coil spring is tilted, and the lower edge of the presser member comes into contact with the upper surface of the sheet of paper. Then, by operating the handle, a torsional force is applied to the coil spring to strongly press the upper surface of the sheet of paper. do. In the above, when the lower edge of the presser member comes into pressure contact with the sheet surface, the plane formed by the middle arm and the front arm tilts the front arm forward with respect to the plane formed between the axis of the coil spring and the middle arm. tilts downward corresponding to the angle. In other words, the front arm, which is tilted forward when the middle arm is in an upright state, changes its inclination downward as the presser member descends, and this change is regulated by the elongated hole, so that the outer wall of the presser member A strong twisting force acts on the lower edge via the middle arm. As a result, the torsional force of the coil spring and the inclination angle of the fore arm make it possible to grip the paper sheet more strongly.

In addition, in the above case, even if an external force is inadvertently applied to the middle arm of the coil spring in an upright state and the middle arm tries to fall down, as already mentioned, the bending of the middle arm causes the front arm to move forward. The inclination changes to a downward inclination, and a load is applied between the front arm and the elongated hole.As a result, the middle arm is prevented from falling down, and the holding member is able to resist the external force during handling. It will not fall in a disorderly manner.

Example Embodiments of the present application will be described in detail below with reference to the drawings.

1 is the base plate, one side stock edge is bent at right angle,
A wall plate 2 is formed, and nail plates 3 are provided in parallel to the wall plate 2 by cutting and bending at three locations on the base plate 1 in the longitudinal direction. A shaft 4 passes through between the central nail plate 3a of these nail plates 3 and the wall plate 2, and the front end of this shaft 4 has a large diameter head, and the rear end has a head with a large diameter. A stop portion 5 is formed to prevent the shaft 4 from being pulled out. The base end of a handle 6 is rotatably attached to the shaft 4, and a conical torsion coil spring 7, which is formed so that its diameter gradually decreases in the distal direction, is rotatably fitted to the shaft by the small diameter portion of the conical torsion coil spring 7. The large diameter end of the coil spring 7 is extended and locked in the groove of the handle 6, and the small diameter end of the coil spring 7 is extended to form a middle arm 8. , this middle arm 8 is L
The front arm 9 is bent into a letter shape, and as shown in FIG. 2, the front arm 9 is tilted forward (downward in FIG. 2) when the middle arm 8 is in an erect state. The lower arms 11 of the crankshaft 10 made of metal rods are passed through the two front and rear claw plates 3b and 3c provided on the base plate 1 and the wall plate 2, respectively, and the ends are crushed to form a stop. In addition, the lower arm 11 has a middle arm 12 bent into an L shape and a middle arm 12 extending from the tip thereof.
1 and a forearm 13 bent in the opposite direction. Reference numeral 14 denotes a holding member consisting of a frame with a downward U-shaped cross section, and shaft holes 15, 15 penetrating in a direction orthogonal to the longitudinal direction are formed in the front and rear positions of the inner and outer wall plates 14a and 14b. ，
A long hole 16 slightly offset in the longitudinal direction is passed through the central position of 14b. The front arms 9 of the coil springs 7 are inserted through the coil springs 7 so as to be rotatable and movable back and forth, and the tips of the front arms 13 that protrude outward from the presser member 14 of the crankshaft 10 form a stop portion 17 by being pressed. are doing. Reference numeral 18 indicates an engagement hole that engages with a locking piece 6a provided at the free end of the handle 6 when the handle 6 is laid down, and maintains the press member 14 in pressure contact with the base plate 1. Reference numeral 19 fixes the base plate 1. Showing the cover plate.

When a sheet of paper is to be clamped, the sheet of paper P is placed on the base plate 1 as in the conventional case, and then the handle 6 is rotated in the direction in which the presser member 14 descends. Then, the coil spring 7 rotates around the shaft 4, and as the middle arm 8 of the coil spring 7 tilts, the presser member 14 descends together with the front arm 9, and its lower edge comes into contact with the upper surface of the sheet. When the handle 6 is further rotated against the torsional force of the coil spring 7, the lower edge of the outer wall of the presser member 14 is strongly pressed, and the lower edge of the inner wall is also pressed, and the locking piece 6a is engaged. By being locked in the matching hole 18, the sheet of paper is pressed and held between the base plate 1 and the holding member 14.

In the above, when the lower edge of the presser member 14 is in pressure contact with the top surface of the paper sheet, the plane formed by the middle arm 8 and the front arm 9 is different from the plane formed by the middle arm 8 at the axis of the coil spring 7. 9 is tilted downward corresponding to the angle of tilting forward.

That is, the front arm 9, which is tilted forward when the middle arm 8 is in an upright state, changes to a downward tilt as the presser member 14 descends, and this change is regulated by the elongated hole 16. A strong twisting force acts on the lower edge of the outer wall 14a of the holding member 14 via the forearm 9. As a result, the torsional force of the coil spring 7 and the inclination angle of the forearm 9 make it possible to more strongly grip the paper sheet P.

Furthermore, in the above, when the middle arm 8 of the coil spring 7 is erected and the presser member 14 is raised, for example, when an external force is inadvertently applied during the stacking operation of paper sheets P, the middle arm 8 is moved to the presser member 14. 14 tries to fall down due to its own weight, as mentioned above, as the middle arm 8 falls down, the forward inclination of the fore arm 9 changes to a downward inclination, and the connection between the fore arm 9 and the elongated hole 16 changes. Since a load is applied between them, the middle arm 8 is prevented from falling down, and the presser member 14 will not descend unnaturally due to external force.

Effects of the Invention As described above, according to the present application, when the middle arm of the coil spring is in the upright state, the front arm is in a state inclined in the front direction of the presser member. Due to the twisting force and the inclination angle of the front arm, it is possible to grip the paper extremely firmly, and when the middle arm is in the upright position,
Since the presser member does not descend erratically due to the action of an external force, it has the advantage of being convenient for stacking paper sheets.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, in which Fig. 1 is an overall perspective view with some parts omitted, Fig. 2 is a partially cutaway plan view showing the presser member in an elevated state, and Fig. 3 is a partially cutaway plan view showing the presser member in a lowered state. FIG. 2 is an enlarged vertical cross-sectional view with some parts omitted, showing a state in which it has been removed. In the figure, 1 is the base plate, 6 is the handle, 7 is the coil spring, 8 is the middle arm, 9 is the front arm, 10 is the crankshaft, 1
4 is a holding member, and 16 is a long hole.

Claims (1)

[Scope of utility model registration request] By rotating the handle, a holding member with a downward U-shaped cross section supported by the crankshaft is lowered against a coil spring, and the sheet of paper is held between the base plate and the holding member. In the paper clamp, when the middle arm of the coil spring is in an upright state, the front arm is inclined in the front direction of the holding member, and the hole through which the front arm of the holding member is inserted is formed into a long hole in the longitudinal direction of the holding member. A paper clip that is characterized by: