JPH0650157Y2 - 2-hole punch - Google Patents

Description

FIELD OF THE INVENTION The present application relates to a two-hole punch.

2. Description of the Related Art Conventionally, a ridge having a height that allows the intervention of a paper to be punched is provided at the rear of the left and right positions of the upper surface, and a hole for inserting a rod-shaped punching blade described later is provided at the front thereof. The installed base and the rear parts are fixed to the left and right hills to form a paper intervening part between the front part and the top surface of the base, and a guide hole on the bottom surface of the front part. A pair of left and right support members, each having a horizontal support piece having a support hole for supporting the upper part of the punched blade body in the front-rear direction and having an upward U-shaped cross section, and front and rear parts of the left and right side plates of the support member. A pair of left and right rod-shaped perforating blades which are supported by a support pin penetrating an arc-shaped guide hole provided and move up and down between the support hole, the guide hole, and the drilling hole, and a downwardly facing front and left position. Forming a letter-shaped connecting portion, the connecting portion is attached to the front portions of the left and right supporting members so as to be tiltable by a pivot pin, Further, the operating member having both ends of the support pin connected to the connecting portion, and the operating member is interposed between the connecting portion of the operating member and the left and right support members, respectively, and elastically biases the operating member in the opening direction. A two-hole perforator having a pair of left and right springs and a back cover detachably attached to the lower portion of the base for receiving the perforated paper pieces is known.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, in the known perforator, in general, a pivot pin is inserted into the left and right connecting portions of the operating member with respect to the instrument base in which the rear portion of the supporting member is fixed to the left and right ridges, , With the spring inserted thereinto, the pivot pin is engaged with the notch recess provided in the front edge of the support member to assemble the operating member, and then the drilling blade is provided on the support piece from above. The support hole, the guide hole provided in the support member, and the hole formed in the instrument base, and then the operation member is assembled against the urging force of the spring with the operation member assembled to the instrument base. While tilted downwards, it is supported from the side by a hole provided in the side plate of the connecting portion, an arcuate guide hole provided in the front side plate of the support member, and a through hole penetrating in the orthogonal direction provided in the drilling blade body. The pin is inserted and the production is completed.

That is, the support pin that supports the drilling blade is inserted into the through hole from the side in the final step of manufacturing, and the drilling blade is located in the support member. The holes are difficult to see because they are hidden in the support member, so that it is extremely troublesome to align the direction of the through holes with the holes of the connecting portion and the guide holes of the support member and insert the support pins into the holes.

Means for Solving the Problems Therefore, in order to solve the above-mentioned conventional problems, the present application provides
In the above-described two-hole punch, when the operating member is tilted to a position facing the drilled hole on the inner surface of the back cover, a projection for regulating the position which faces the end of the valley of the blade of the drilling blade. Preferably, the upper surface of the projecting piece is formed in a curved shape in conformity with the shape of the valley portion, and the back cover and the projecting piece are made of synthetic resin.

Function In the process of manufacturing a punch, however, when the punching blade is dropped into a hole through which it can be moved vertically, part of the blade edge comes into contact with the upper surface of the projecting piece and then the punching blade is cut. While being guided by the curved shape of the blade, the body descends by its own weight and is guided to the most physically stable valley portion, whereby the position of the punched blade body that is dropped is automatically regulated by the projecting piece.

Therefore, in order to support the punching blade body by the support pin, in accordance with the direction of the through hole provided in this, the direction of the valley of the blade,
By providing the projection piece on the inner surface of the back cover, the insertion direction of the support pin into the through hole can be automatically set.

Embodiments Referring to the drawings in detail, FIG. 1 is a plan view in which a part of the perforator of the present application is cut away, and FIG. 2 is a longitudinal sectional view thereof, respectively. A ridge (2) at the rear that is high enough to allow the intervention of the paper to be drilled,
A device stand having a hole (4) for inserting a rod-shaped punching blade (3) in its front part, and (5) has a rear part by means of a stopper (6) on the ridge (2). It is fastened to form a paper intervening part (7) between the front part and the table (1), and has a guide hole (8) at the bottom of the front part and the punching blade at the upper part thereof. A supporting member (10) having a supporting hole (9) for supporting the upper part of the body (3) is provided horizontally by bending, and is a support member (5) having an upwardly U-shaped cross section and long in the front-rear direction. ) Support pins inserted in circular arc-shaped guide holes (12) provided in the front part of the side plate and through holes (13) provided orthogonally to the punching blade body (3), and (14) is directed to the front left and right positions downward. U-shaped connection (1
5) is formed, and the connecting portion (15) is connected to the supporting member (3).
The operation member is fitted to the front part of the, and is tiltably attached by the pivot pin (16), and both ends of the support pin (11) are connected to the connection part (15), and (17) is the operation member. A spring (18) interposed between the connecting portion (15) of (14) and the support member (5) for elastically biasing the operating member (14) in a direction to always open the operating member (14) is the base (1). Is a back cover made of synthetic resin fitted to the lower surface of the.

Further, the present application is characterized in that, in the above-mentioned configuration, the back cover (18) is provided on the inner surface thereof with a protruding piece (20) for position regulation facing the end position of the valley portion a of the blade of the punching blade body (3). It is what

That is, as is well known, the blade of the perforated blade body (3) is recessed in a mountain shape as shown in FIGS.
This valley portion a reaches the lower surface position of the equipment base (1) in a normally perforated state, and at this time, the projecting piece (20) has a valley portion a.
The end surface of the protrusion (20) is slightly contacted or slightly separated, and the upper surface of the projecting piece (20) is preferably formed in a curved shape in conformity with the shape of the valley a.

Then, in the final step of manufacturing the punch, the punch blade (3) is dropped into the support hole (9), the guide hole (8) and the drill hole (4) from above the support piece (10).

Then, a part of the peripheral edge of the perforated blade body (3) is changed to the protruding piece (20).
After coming into contact with the upper surface of the blade, the punching blade (3) descends by its own weight while being guided by the curved shape of the blade, and the protruding piece (20).
Is guided to the most physically stable trough a, and the position of the punching blade (3) dropped by this is automatically regulated by the projecting piece (20).

Therefore, by providing the projecting piece (20) on the inner surface of the back cover (18) so as to match the direction of the trough a provided on the punching blade body (3) and the through hole (13), the through hole (13) is formed. The insertion direction of the support pin (11) with respect to is automatically set.

EFFECTS OF THE INVENTION Since the present application is configured as described above, it has an advantage that the support pin can be easily inserted into the through hole provided in the drilling blade body and is extremely convenient for manufacturing.

[Brief description of drawings]

The drawings show an embodiment of the present application. Fig. 1 is a partially cutaway plan view, Fig. 2 is a vertical sectional side view of an essential part, and Fig. 3 is an enlarged front view of the essential part during perforation. Is an enlarged side view of the same. In the figure, (1) is a device frame, (3) is a drilling blade, (4) is a through hole, (5) is a support member, (9) is a support hole, (11) is a support pin, and (12) is Guide hole, (13) through hole, (14) operating member, (17) spring, (18) back cover, (20)
Is a protrusion and a is a valley.

Claims (3)

[Scope of utility model registration request] 1. A rear portion of a support member is attached to rear portions of left and right positions on an upper surface of an instrument stand, and a hole and a guide hole are provided on a surface facing the instrument stand and a front portion of the support member. An operating member is pivotally connected to the member so as to be tiltable, and a supporting pin penetrating an arcuate guide hole provided in the supporting member is pivotally attached to the operating member, and the support pin is provided with the drilling hole and When a drilling blade that can be inserted into the guide hole is pivotally attached and the operating member is tilted against the spring interposed between the device base and the operating member, the lower parts of the pair of left and right drilling blades are used as the device base. A two-hole perforator configured to move down to a position penetrating a provided perforation hole, and detachably attached to a lower surface of a base for storing a cut piece after perforation. When the operating member is tilted to a position facing the drilled hole on the inner surface of the back cover, the drilling blade Perforator for 2 hole made by providing a projecting piece for position regulation facing the the end of the valley of the blade. 2. The perforator for two holes according to claim 1, wherein the upper surface of the projecting piece is formed in a curved shape in conformity with the shape of the valley. 3. The two-hole puncher according to claim 1, wherein the back cover and the protrusion are made of synthetic resin.