CN86206400U - Double-sawblade saw with both coarse and fine teeth - Google Patents

Abstract

The utility model relates to a double-sawblade saw with both coarse and fine teeth. The double-sawblade saw with both coarse and fine teeth is provided with two sawblades with coarse and fine teeth in different sizes. While in use, the fine teeth part of the sawblade makes the cutting accurate, smooth and flat when sawing begins and stops. An appropriate sawblade on the double-sawblade saw with both coarse and fine teeth can be used for sawing wood with different sizes. Compared with an ordinary saw, the double-sawblade saw with both coarse and fine teeth has the advantages of easy use, convenient carrying can conveniently storing.

Description

Double-sawblade saw with both coarse and fine teeth

The utility model is to wood working tool---the improvement of carpenter's hand saws, title are two saw blade thickness tooth carpenter's saws, and this saw is by two saw beams, saw post, saw blade, box and a saw screw be combined into.

Use common hand saws sawmilling material, often beat when driving saw, depart from the line of original picture sometimes, influence the accuracy of blanking because of sawtooth causes saw blade more greatly.When timber soon cuts, also can because of sawtooth more greatly next fritter of timber marginal belt.Therefore, the carpenter slows down the speed of dragsaw with being careful or uses small size saw instead when driving saw and receiving saw, in order to avoid incision position is smooth inadequately smooth, the woodenware of particularly doing exquisiteness is particularly like this.Common carpenter's saw is only installed a saw blade, has only a kind of sawtooth on the saw blade, disconnect the timber that varies in size, and will use several different saws of thickness, and this is carrying, depositing and is using not very convenient.

The purpose of this utility model provides a kind of convenient and practical carpenter's hand saws, on sawing two different thickness rack saw bars of big trumpet is installed owing to one, and making has four kinds of sawtooth that vary in size on this saw, in use can select for use arbitrarily as required.

Its concrete grammar is:

Symmetric figure is made in the both sides of every saw beam, in the both sides of saw post two different thickness rack saw bars of big trumpet is installed respectively, two mutual tensionings of saw blade, the wherein saw blade of the side effect of tensioning opposite side saw blade of having held concurrently.This saw is installed, except using three boxs, also will be used box and the conjunction of sawing screw in the common saw.Promptly be that a top is saw screw shape, the bottom is the screw of box shape.This part in use, its top play a part the saw screw; Rotatablely make the saw blade tensioning; The box effect is played in the bottom, can insert saw blade in the slit, and not tightly card is not firm with nail.

Thickness rack saw bar is when producing saw blade, and a saw blade is made two kinds of teeth.Promptly the head saw tooth of bastard (canine tooth) as normal use, account for 3/4ths or 4/5ths of saw blade total length, this part sawtooth is in the middle and lower part of saw blade, above one section account for 1/4th or 1/5th of saw blade total length, make the serration (promptly than bastard part little No. one tooth) all different with bastard part tooth depth tooth pitch.Produce this saw blade, the different several kinds of big trumpet can be arranged, in each kind, can have bastard and serration on saw blade, to account for several different sizes of different length ratio again.

Use this saw, opening when saw can be with the top thin tooth part of saw blade, wait to leave an osculum after, again saw is drawn back downwards significantly.When soon receiving saw, again saw is pushed to thin tooth part, make blanking accurate, smooth, smooth, meet the timber that varies in size, the gap of saw difformity size can be selected certain section suitable saw blade on the saw arbitrarily for use turning over about saw.When cutting down a certain saw blade, the toothed one side of another root saw blade is then turned in the inboard, and when carrying and depositing, the flank of tooth of two saw blades all is turned to the inboard, and sawtooth is not exposed, and has avoided damaging and has pointed or hang bad clothing.This saw is given and to be used, to carry, deposit and all brought convenience, one saw has been played many effects of sawing.

Accompanying drawing has been described an embodiment of the present utility model.

Accompanying drawing is the front view of this saw.1. sequence number is the conjunction of box and saw screw among the figure, can be described as the box screw.2. and 8. sequence number is two saw beams.7. and 9. 3. sequence number be three boxs.4. sequence number is small size thickness rack saw bar, and wherein A section sawtooth is the minimum tooth on this saw, and the B section is slightly bigger tooth.5. sequence number is the saw post, and 6. sequence number is large size thickness rack saw bar, and wherein C section sawtooth is more bigger tooth on this saw, and the D section is a maximum tooth.

Claims (2)

1, carpenter's hand saws, by two saw beams, saw post, saw blade, box and a saw screw be combined into, it is characterized in that: the bilateral symmetry of every saw beam, saw the conjunction that three boxs and a box is housed on the beams and saws screw for two, on box and this conjunction, two not thickness rack saw bars of jack per line are housed, the tooth depth difference is all arranged on the every saw blade.Two kinds of sawtooth that tooth pitch is also different.

2, according to carpenter's hand saws of claim 1, it is characterized in that: the bastard of every saw blade accounts for 3/4ths or 4/5ths of length of saw blade, and serration accounts for 1/4th or 1/5th of length of saw blade.

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