JPH0361000A - Drill for two holes - Google Patents

Abstract

PURPOSE:To improve a drilling function by providing a rotary mechanism which exerts a rotation action on a drill blade body when an operation member is lowered. CONSTITUTION:When an operation member 13 is inclined downward against the force of a spring 17 in order to effect drilling, a drilling blade body 3 is lowered. Along with lowering of the drilling blade body 3, the one end part of a support pin 20 extending through the blade body and the other end thereof are guided in a direction, in which the end parts are positioned opposite to each other, by means of a frontward downward inclined guide hole 11a and a rearward downward inclined guide hole 11b, respectively, the support pin 20 is horizontally rotated in the range of a laterally long coupling hole 16, and this constitution causes lowering of the drilling blade body 3 as it is rotated.

Description

[Detailed description of the invention] Industrial applications The present application relates to a two-hole punch with improved drilling capabilities.

Conventional technology Conventionally, at the rear of the top surface, a ridge with a height that allows the intervention of the paper to be perforated is provided, and at the front thereof, a perforation hole through which a rod-shaped perforation blade described later is inserted is provided. The rear part is fixed to the left and right ridges to form a paper intervention part between the front part and the upper surface of the table, and a guide hole is formed in the bottom of the front part, and a guide hole is formed in the upper part of the table. A pair of left and right support members each having a support hole with a support hole that supports the upper part of the perforating blade body in the front and back direction, and a pair of left and right support members each having an upwardly facing U-shaped cross section and provided at the front of the left and right side plates of this support member. A pair of left and right rod-shaped drilling blades are supported by support pins that pass through an arc-shaped guide hole and move up and down between the support hole, the guide hole, and the drilling hole, and a downward U-shape is provided at the front left and right positions. a shape of a connecting part, and this connecting part is attached to the front part of the left and right supporting members so as to be tiltable with one pin,
and an operating member in which both ends of the support pin are connected to the connecting portion, and an operating member that is interposed between the connecting portion of the operating member and the left and right support members to always pressurize the operating member in an open direction. A two-hole perforator is known that perforates paper or the like by tilting an operating member downward against a pair of left and right springs.

Problems to be Solved by the Invention However, all of the above-mentioned conventional devices are configured to perforate only by the downward pressing action of the perforating blade, which is particularly difficult when perforating thick documents or hard paper. Ta.

Means for Solving the Problems Therefore, in order to solve the above-mentioned difficulties and improve the drilling function, the present application proposes a method in which an operating member that is tiltably attached to a device stand is tilted downward against a spring. As a result, in a 26-purpose puncher that drills by lowering the punching blade,
When the operating member is lowered, the drilling blade is rotated; 1
It is characterized by being equipped with a rotation mechanism that gives
Specifically, the two-hole perforator has supporting members each having an upwardly facing U-shaped cross section attached to the left and right positions of the top surface of the device stand, and to these supporting members having an upwardly facing U-shaped cross section provided at the left and right positions of the operating member. The connecting portion is pivotally connected so as to be tiltable downward against a spring,
and a support pin passing through the perforating blade by inserting the perforating blade into a support hole provided at the upper part of the support member and a guide hole provided at the bottom thereof, and inserting a support pin penetrating the perforating blade into the guide hole provided in the side plate of the support member. is engaged so that it can be moved up and down, and its both ends are connected to the connection part of the operating member, and the rotation mechanism tilts one of the guide holes provided in the side plate of the support member downward and forward, and the other Insert the support pins into these guide holes with the side tilted downward and backward, and then connect them to the horizontally long connecting holes provided on the side of the connecting part of the operating member, or use the two-hole holes described above. In the device, an engagement protrusion is provided in the support hole of the branch, and an inclined cam groove is provided in the upper part of the punching blade supported by the support hole, and the engagement protrusion is engaged with this. In addition, the through hole is formed so that the punching blade can rotate relative to the support pin.

Function: When the operating member is tilted upward by the spring, the drilling blade is in the upward movement position and
The support pin is located at the upper end of the guide hole.

From this state, when the operating member is tilted downward against the spring in order to drill a hole, the operating blade is lowered. According to claim 2, as the drilling blade descends, one end of the support pin passing through it is formed by a guide hole that slopes downward and forward, and the other end of the support pin is formed by a guide hole that slopes downward and rearward. Since they are guided in opposite directions, the support pin horizontally pivots in the area of the oblong connecting hole, whereby the punching blade descends in a pivoting manner.

Further, in claim 3, as the perforating blade descends, a rotational action is imparted to the perforating blade due to the engagement between the engaging protrusion and the cam groove, and the perforating blade rotates horizontally with respect to the support pin. do.

Therefore, drilling is performed by the pressing action and rotational action caused by the lowering of the drilling blade.

EXAMPLE To explain the drawings in detail below, FIG. 1 shows a partially cutaway plan view of the perforator of the present application, and FIG. 2 shows a sectional view thereof, and (1) shows the left and right positions of the upper surface. At the rear, there is a ridge (2) with a height that allows the insertion of the paper to be punched, and at the front there is a punching hole (4) into which the rod-shaped punching blade (3) is inserted.
A utensil stand (5) has a rear part fixed to the ridge part (2) by a stopper (6), and a paper intervening part between the front part and the utensil stand (1). (7), and a guide hole (8) is formed on the bottom of the front part, and the perforating blade body (3) is formed on the top of the guide hole (8).
) supporting piece (10) having a support hole (9) for supporting the upper part of the
It is a support member that is horizontally bent and has an upwardly U-shaped cross section and is long in the front and back direction.As shown in FIG.
However, there is also a guide hole (1
1)b are respectively provided, and furthermore, a notch recess (12) is provided at the front end.

(13) is a downward U-shaped connecting part (1
4), and an operating member (17) having a pivot hole (15) and a horizontally elongated connecting hole (16) in its side pieces, respectively.
is a coil spring, and this coil spring (17)
is held in the connecting portion (14) of the operating member (13) by being engaged with the pivot pin (18) inserted into the connecting hole (15), and in this state, the pivot pin (18) is inserted into the support member. (5) engages with the notch recess (12). On the other hand, insert the perforation blade (3) into the support hole (9), the guide hole (8) and the perforation hole (4),
In this state, the operating member (13) is moved downward by one turn against the spring (17), and the connecting hole (16), the guide holes (11) a, (11) b, and the drilling blade are opened. (3)
A through hole (]9) provided orthogonally to the support pin (2o)
It is meant to be inserted through. (21) is a back cover that prevents synthetic resin from being fitted onto the bottom surface of the table (1).

Therefore, the spring (17) causes the operation member (13
) is tilted upward, as shown in FIG. It is located at the upper end of b.

In order to drill a hole from this state, when the operating member (13) is tilted downward against the spring (17), the operating blade (3) is tilted downward against the spring (17).
) is lowered, and as the support pin (20) passes through it, the front end of the guide hole (11) a slopes downward and forward, and the other end of the support pin (20) slopes downward and rearward. Since the support pins (20) are guided in opposite directions by the holes (11) b, the support pins (20) horizontally rotate within the range of the horizontally long connecting holes (20), thereby causing the drilling blade (3) to rotate while rotating. descend.

That is, drilling is performed by the rotation action and the pressing action by descending.

In the above, as a rotating mechanism, both ends of a support pin (20) that supports the punching blade (3) through the guide hole (11) a which is inclined in the relative direction are provided in the left and right side plates of the actuating member (5), respectively.
, (11)b and the connecting part (14) of the operating member (13)
Figs. 7 to 9 show the case in which the support holes (9) of the support piece (10) are inserted through the horizontally elongated connection holes (16) provided in the support pieces (10).
As shown in FIG. 7, an inclined cam groove (26) is formed in the upper part of the punching blade (3) supported in the support hole (9). At the same time, the through hole (19)' provided in the support pin (20) is shaped so as to be horizontally rotatable relative to the support pin (20), as shown in FIG. The section is the same as before,
This shows another embodiment in which the support member (5) is inserted through an arc-shaped guide hole provided in the left and right side plates and a connecting hole of a circular hole provided in the connecting portion of the operating member. When the drilling blade (3) descends, the engaging protrusion (25
) and the cam groove (26), the perforating blade (3) is given rotational action, and thereby the perforating blade (3) is rotated from the position shown by the solid line in FIG. 8 to the position shown by the imaginary line. move.

FIG. 9 shows another embodiment of the perforating blade (3),
The upper shaft part (3)a having the cam groove (26) and the through hole (19)' is made of hard synthetic resin or ceramics that are easy to process, and the blade part (3)b is made of steel. A case is shown in which these are fixed by a fastener (28).

Effects of the Invention As mentioned above, since the present application performs drilling by the pressing action and rotation action of the drilling blade, it has the advantage that it can provide a product with extremely excellent drilling function.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a partially cutaway plan view, FIG. 2 is a sectional view taken along line I-1, and FIG.
Figure 4 is a sectional view of the drilling state corresponding to Figure 2, Figure 5 is a side view of the support member, Figure 6 is a side view of the operating member, Figure 7 is a sectional view of the other A side view of the punching blade in the embodiment, FIG. 8 is a cross-sectional view thereof, FIG. 9 is a cross-sectional view showing the relationship between the punching blade and the support hole, and FIG. 10 corresponds to FIG. 7. FIG. 3 is a side view of the embodiment. In the figure, (1) is the device stand, (3) is the punching blade, (5) is the support member, (11)a, (11)b are the guide holes, (13)
is the operating member, (14) is the connecting portion, (16) is the connecting hole, (
17) is a spring, (18) is a pivot pin, (19),
(19)″ is a through hole, (20) is a support pin, (25
) is an engaging protrusion, and (26) is a cam groove.

Claims (4)

[Claims] (1) The operating member is attached to the instrument stand so that it can be tilted freely.
A two-hole puncher that lowers the punching blade to drill holes by tilting downward against a spring, and is equipped with a rotation mechanism that gives rotational action to the punching blade when the operating member is lowered. A two-hole perforator characterized by the following. (2) The two-hole perforator has supporting members each having an upwardly facing U-shaped cross section attached to the left and right positions of the top surface of the instrument stand, and to these supporting members each having a downwardly facing U-shaped cross section provided at the left and right positions of the operating member. are pivotally connected so that they can freely tilt downward against a spring, and
Insert the perforating blade into the support hole provided at the top of the support member and the guide hole provided at the bottom of the support member, and insert the support pin penetrating the perforation blade into the guide hole provided in the side plate of the support member up and down. The rotating mechanism tilts one of the guide holes provided in the side plate of the support member downward and forward, and tilts the other one downward and forward. Insert the support pins into these guide holes by tilting downward and backward,
The two-hole perforator according to claim 1, further connected to a horizontally elongated connecting hole provided on a side surface of the connecting portion of the operating member. (3) The two-hole perforator has supporting members each having an upwardly facing U-shaped cross section attached to the left and right positions of the top surface of the instrument stand, and to these supporting members each having a downwardly facing U-shaped cross section provided at the left and right positions of the operating member. are pivotally connected so that they can freely tilt downward against a spring, and
Insert the perforating blade into the support hole provided at the top of the support member and the guide hole provided at the bottom of the support member, and insert the support pin penetrating the perforation blade into the guide hole provided in the side plate of the support member up and down. The rotating mechanism is configured to be movably engaged, and its both ends are connected to the connecting portion of the operating member, and the rotation mechanism is provided with an engaging protrusion in the support hole of the branch, and the rotation mechanism is provided with an engaging protrusion in the support hole of the drilling blade. Claim 1: An inclined cam groove is provided in the upper part supported by the cam groove, and the engaging protrusion is engaged with the cam groove, and a through hole is formed so that the punching blade can rotate with respect to the support pin. The two-hole punch described. (4) The two-hole punch according to claim 3, wherein the cam groove of the punching blade and the upper part having the through hole are made of an easily processable material such as hard synthetic resin or ceramics.