CN2083991U

CN2083991U - Scissors

Info

Publication number: CN2083991U
Application number: CN 90219911
Authority: CN
Inventors: 任伟民
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-11-09
Filing date: 1990-11-09
Publication date: 1991-09-04

Abstract

The utility model relates to a pair of novel grading advancing scissors, which is a pair of grading advancing scissors for cutting hard plastic pipes in a single direction and belongs to manual cutting tools. The utility model is composed of a handle (1), a handle (2), blades (3), a supporting head (4), a torsional spring (5), a hinge type connecting rod (6) and a retreat stopping sheet (7). The utility model has reasonable lever ratios, light weight, force saving and smooth cut surfaces and is suitable to be operated by a single hand. The utility model is a manual shearing tool for increasing the installation quality and the construction speed of plastic pipelines especially.

Description

Scissors

The utility model belongs to hand cutting tool, is specifically related to a kind of cutting hard plastic tube.Improve plastic conduit and press the light-duty scissors of packing quality and speed of application.

In the prior art, scissors generally realizes cutting purpose with the shearing of relative cutting edge, as be used for shearing hard plastic tube, not only the effort, the pipe easy glide, and because be that cutting edge cuts simultaneously up and down, the cut surface of two cutting edges can not guarantee at grade, and the out-of-flatness of cutting end face has tangible shearing handing-over trace and flattens phenomenon.Can not guarantee that cut surface is axially vertical with pipe, often need cutting part is carried out shaping, file or sand milling etc., the time-consuming material that takes, what influence plastic conduit presses packing quality and speed of application.

The purpose of this utility model provides smooth smooth, the cutting part of a kind of cut surface does not have distortion substantially.Rapid operation is the scissors of the unidirectional cutting hard plastic tube of step-feeding easily.

The design of the utility model Scissors is as described below:

Scissors is as shown in Figure 1: mainly be made up of handle (1), handle (2), blade (3), fastener (4), torsion spring (5), articulated connecting rod (6) and retaining sheet (7).Handle (1) is " Z " shape (seeing accompanying drawing 2), the curved jaw in top.By inclination alpha (α=10 °～25 °) and arc R ₁, R ₂Constitute,, formed and held the pipe condition of self-locking, grip and cut pipe with the bearing-surface C of symmetry, when plastic tube is sheared by blade (3), can slippage and deflection, guaranteed the vertical shear of blade (3) to pipeline.The whole top of handle (1) is the laminated structure of parallel jag, and the groove width of jag is slightly larger than the thickness of blade (3).Blade (3) puts the first edge on a knife or a pair of scissors for " V " shape, and cutting edge is aimed at the center line (seeing that accompanying drawing 1 A-A analyses and observe) of fork pockets.There is a pilot hole (8 ') that matches with the pilot hole (8) of handle (1) at the middle part of blade (3), and Lower Half is shaped on evenly distributed ratchet on the arc that with hole (8 ') is the center of circle.Ratchet has rational inclination angle.Be lined with retaining sheet (7) in blade (3) both sides, with bolt handle (1), blade (3), retaining sheet (7) be assembled into a kind of rotatablely under certain external force effect, and remove after the external force the i.e. progressive rotating mechanism of retaining of location.Retaining sheet (7) adopts the Thin Elastic steel disc to make, and is the wave washer with 2 above crests.

Laborsaving according to compactness, light and handy reasonably design principle, handle (1), handle (2), blade (3), fastener (4), torsion spring (5) have been formed progressive shearing four linkages in light and handy labour-saving by pilot hole (8) (8 '), (9) (9 '), (10), and handle (1), handle (2), blade (3) and articulated connecting rod (6) have been formed easy backing mechanism again by pilot hole (8) (8 '), (9) (9 '), (11), (12) simultaneously.Because the effect of torsion spring (5), fastener (4) is pasting the ratchet of blade (3) bottom, in operation, the perseveration that unclamps along with holding with a firm grip, promptly producing blade (3) is that the ratchet of fulcrum, blade (3) bottom is the progressive unidirectional cutting action in force with hole (8 ').Articulated connecting rod (6) is with 2 sheet metals or plastic sheet is hinged forms.

The utility model Scissors compared with prior art, its advantage is: 1, adopted progressive shearing four linkages in light and handy labour-saving and easy backing mechanism in the design, cutting easily is fit to one-handed performance.2, handle (1) is " Z " shape, and the curved jaw in top is by inclination alpha (α=10 °～25 °) and camber line R ₁, R ₂Constitute.Formed with bearing-surface C and to have held the pipe condition of self-locking, when plastic tube is sheared, by clamping reliably, can slippage and deflection, guaranteed the vertical shear of blade (3) to pipeline, make the cut surface of pipeline smooth smooth indeformable.3, Scissors shearing scope is bigger, can shear the hard plastic tube of Dg15～Dg40, is convenient to on-site construction operations.

Description of drawings:

Fig. 1 is an installation diagram of the present utility model.Handle (1), its porose (8), (9); Handle (2), its porose (9 '), (10), (11); Blade (3), its porose (8 '), (12); Fastener (4); Torsion spring (5), articulated connecting rod (6); Retaining sheet (7).

Fig. 2 is the view of handle (1).

Fig. 3 is the view of retaining sheet (7).

The embodiment of the utility model Scissors such as Fig. 1, Fig. 2, shown in Figure 3.

Claims

1, Scissors is a kind of novel scissors of unidirectional cutting hard plastic tube, mainly form by handle (1), handle (2), blade (3), fastener (4), torsion spring (5), articulated connecting rod (6) and retaining sheet (7), it is characterized in that handle (1) is " Z " shape, the curved jaw in top (as accompanying drawing 2) is by inclination alpha (α=10 °～25 °) and arc R ₁, R ₂Constitute, with the bearing-surface C of symmetry, formed and held the pipe condition of self-locking, when plastic tube was sheared by blade (3), unlikely slippage and deflection had guaranteed the vertical shear of blade (3) to pipeline; Blade (3) both sides are lined with retaining sheet (7), and the Lower Half of blade (3) has the ratchet of curved arrangement; Fastener (4) is pasting the ratchet of blade (3) because of the effect of torsion spring (5); Handle (1), handle (2), blade (3), fastener (4), torsion spring (5) have been formed progressive shearing four linkages in light and handy labour-saving by pilot hole (8) (8 '), (9) (9 '), (10); Handle (1), handle (2), blade (3) and articulated connecting rod (6) have been formed easy backing mechanism again by pilot hole (8) (8 '), (9) (9 '), (11), (12) simultaneously.

2, Scissors according to claim 1 is characterized in that the afterbody of blade (3) is arranged with uniform ratchet, and ratchet cloth has rational inclination angle being on the camber line in the center of circle with hole (8 ').

3, Scissors according to claim 1 is characterized in that the cutting edge of blade (3) puts the first edge on a knife or a pair of scissors for " V " shape.

4, Scissors according to claim 1 is characterized in that articulated connecting rod (6) is with 2 sheet metals or plastic sheet is hinged to form.

5, Scissors according to claim 1.It is characterized in that retaining sheet (7) is the wave washer that adopts the Thin Elastic steel disc to make, and has the crest more than 2.