CN86206766U - Adjustable t-square for mapping - Google Patents

Abstract

The utility model discloses an adjustable T-square for mapping and is suitable for mapping the mapsheet with various specifications, comprising a square head. A suite of auxiliary square mechanism formed by an auxiliary square perch, an auxiliary square, etc. is arranged on the common T-square formed by a main square; when the mapping the small mapsheet, the auxiliary square and the auxiliary square perch are together pushed in the inner cavity of the main square. When the mapping the large mapsheet, one section or some sections of the auxiliary square are drew out from the inner cavity of the main scale together with the auxiliary square perch according to the requirement. A forced locking device is arranged under the main square; the auxiliary square or the tail part of the auxiliary square perch are both abutted on the tail end of the main square during working.

Description

Adjustable T-square for mapping

The utility model is a kind of improved drawing T-square, the telescopic drawing T-square that specifically a kind of chart board that can cooperate all size is drawn.

Existing drawing T-square mainly is made up of chi head and blade.The specification key of this T-square is the length of blade, and several specifications of length are arranged, with supporting with corresponding chart board.The T-square of selling on the market is exactly this form, and when the big map sheet of drafting adopted trestle board, the user must select the T-square of length for use; When the less map sheet of drafting adopted little chart board, the user selected short T-square again for use, makes drawing instrument various, uses inconvenience.

The purpose of this utility model is to provide a kind of improved drawing T-square, and it can elongate or shorten, to guarantee and the supporting use of various drawing boards.

Task of the present utility model is finished as follows: at blade main scale is arranged partly.A secondary chi bar is installed in the main scale inner chamber, and secondary chi bar can horizontally slip in the main scale inner chamber, and promptly can stretch out also can retraction.The secondary chi of two joints is installed on secondary chi bar, between secondary chi and the secondary chi bar spring body is housed.When drawing big map sheet secondary chi is all extracted out together with secondary chi bar, at this moment the secondary chi of two joints is under the effect of spring body elastic force, and away from secondary chi bar, its working face and main scale working face are formed straight line, and it can draw long lines on drawing; When drawing less map sheet, pin the secondary chi of prosthomere with hand, make it overcome the elastic force of spring body, reduce the width between secondary chi and the secondary chi bar, it is pushed cavity in the main scale, allow the working face and the main scale working face of the secondary chi of a next joint form straight line, it can draw short lines on drawing; When drawing littler map sheet, in kind the back secondary chi of one joint is also pushed the inner chamber of main scale, allow secondary chi bar afterbody near the tail end of main scale, to form a very short blade.The user just can regulate the length of T-square according to the size of chart board like this, need not change T-square.

The utility model cost is low, and is easy to use, only needs a T-square just can replace the T-square of original all size.

Below with reference to embodiment and accompanying drawing thereof the utility model is described in further detail.

Fig. 1 is concrete structure figure of the present utility model.

Fig. 2 is Fig. 1 cutaway view of T-square along the A-A line of drawing.

With reference to Fig. 1, one with the orthogonal chi head of main scale (2) (1) by bonding or be fixed on the stem of main scale (2) with other method, the inner edge of chi head (1) is a working edge, it can slide up and down as the crow flies at the working edge of chart board.There is scale the top of main scale (2), and its limit is a working edge, and the working edge of this edge and chi head (1) is mutually 90 °.Main scale has cavity shown in Figure 1 in (2), and cavity top is shaped as stepped dovetail groove, and the below is a single T groove, and it can be buckled secondary chi mechanism within it, and can horizontally slip within it.When secondary chi was extracted out, the face that main scale, secondary chi contact with drawing all can become a working face.Pair chi mechanism is made up of secondary chi club head (3), secondary chi bar (4), secondary chi bar afterbody (6), secondary chi (5), spring body (7), screw (8), the protruding nail of location eccentricity (12) etc.Secondary chi bar (4) and secondary chi club head (3), secondary chi bar afterbody (6) can directly be processed in aggregates, also can shape the back separately and fix in aggregates with bonding method or other method.Secondary chi bar (4) is between secondary chi club head (3) and secondary chi bar afterbody (6), and its top is lower than secondary chi club head (3) and secondary chi bar afterbody (6).Two joint secondary chis (5) are housed on secondary chi bar (4), its combining form as shown in Figure 2, the top protuberance of secondary chi bar (4) puts in the groove of secondary chi (5) below, secondary chi (5) after the assembling not only can slide up and down on secondary chi bar (4), also move left and right slightly, when secondary chi is worked, because the effect of forced locking device, secondary chi bar afterbody (6) will force secondary chi to lean against the tail end of main scale (2) tightly like this.Under various duties, main scale and secondary chi, secondary chi and secondary chi, main scale tail end and secondary chi bar afterbody, all there are not the gap in secondary chi and secondary chi bar afterbody.Between secondary chi of every joint (5) and secondary chi bar (4) one or many elastomers are housed, present embodiment adopts spring steel plate (7), and is fixed in the groove of secondary chi (5) with screw (8).Have two above rectangular windows in the secondary chi groove of every joint both sides, on the secondary chi bar (4) of relevant position the protruding nail of location eccentricity (12) is housed, protruding nail (12) two ends are eccentric shape, and the centre is cylinder, and it can rotate in the hole of secondary chi bar (4).The installation of protruding nail is to treat that secondary chi (5) is contained in after secondary chi bar (4) goes up, in the hole of secondary chi bar (4), plug cylinder, be stained with eccentric bushing at cylinder two ends again, make it in aggregates, one end of protruding nail (12) also leaves for the notch of adjusting, and the height at the protruding nail two ends after bonding is no more than the outerplanar of secondary chi (5) both sides.The protruding nail of location eccentricity (12) is made with nylon or metal material.When the secondary chi of needs is worked, secondary chi is extracted out in the main scale inner chamber together with secondary chi bar, when saving secondary chi, certain all breaks away from main scale inner chamber top cascaded surface when it is imposed restriction power, certain saves secondary chi just under the effect of spring leaf (7), slide in top to secondary chi bar (4), when secondary chi working face reaches concordant with the main scale working face, when being in alignment, at this moment the protruding nail of location eccentricity (12) will keep off below the spacing window of secondary chi, make it no longer upwards to slide, at this moment secondary chi just can be worked together with main scale.If after secondary chi (5) is located in ejection under the elastic force effect of spring leaf (7) and by protruding nail (12), when its working face is can not be with the main scale working face in alignment, can make it in alignment by rotating eccentric protruding nail (12), generally dispatch from the factory mix up after, do not need to regulate frequently.When secondary chi is all extracted out, secondary chi club head (3) is still stayed in the main scale inner chamber, as shown in Figure 1, the cross section of main scale (2) inner chamber is identical with the cross section of secondary chi club head (3), and coupling mutually, its upper and lower coupling gap should guarantee that secondary chi club head (3) can horizontally slip in the main scale inner chamber, play good guide effect again for secondary chi mechanism, and this gap present embodiment is 0.02～0.05mm.When secondary chi during together with secondary chi bar retraction main scale inner chamber, the cross section that its secondary chi (5) and secondary chi bar (4) are formed and the cross section of main scale inner chamber closely cooperate, and can horizontally slip, and reach flexible purpose.What be worth proposition is, when secondary chi (5) retraction main scale inner chamber, the ladder inclined-plane that ladder inclined-plane that inner chamber is recessed and secondary chi protrude is in contact with one another, force spring steel plate (7) pressurized, leave certain clearance between the working face of secondary chi and the corresponding face of main scale inner chamber, they do not contact during operation, and secondary chi working face is worn.As shown in Figure 1, leave the breach on a band inclined-plane in the right-hand member below of main scale (2), the screw made from metal material (9) is housed in the left side of breach, spring steel plate (10), the roller made from metal material or nylon (11), the forced locking device that metal axle (13) etc. are formed, axle (13) is through roller (11) between two otic placodes of steel disc (12), and the other end of steel disc is fixed on the plane below the main scale (2) with screw (9) or with other method.At secondary chi club head (3), three same breach are left in the relevant position, below of secondary chi bar (4), under various duties, the breach of main scale below will overlap with these three breach respectively, and the inclined-plane on the secondary chi club head (3) and the breach left side, secondary chi bar (4) below always slightly exceeds the inclined-plane on the breach left side, main scale (2) below, present embodiment is 1-2mm, like this when T-square is in a certain duty, the elastic force of spring steel plate (10) will force roller (11) to be pressed in tightly on the inclined-plane on the secondary chi club head or the breach left side, secondary chi bar below, as previously mentioned, the suffered power in inclined-plane, the breach left side will produce a gratifying effect, promptly when secondary chi is worked, secondary chi bar afterbody (6) with a joint or the secondary chi of two joints tightly roof pressure make not have the gap between them at the tail end of main scale (2).If the secondary chi of two joints is not all worked, the pressure that inclined-plane, the breach left side, secondary chi bar below is subjected to will guarantee that secondary chi bar afterbody leans against the tail end of main scale tightly, to form short blade.When stretching operation, secondary chi bar or secondary chi club head lower plane are with roller jack-up, and steel disc has a downwarp, and makes the operator that softer power sense be arranged on hand.

Chi head (1), main scale (2), secondary chi club head (3), secondary chi bar (4), secondary chi bar afterbody (6), secondary chi (5) is lucite and makes.

Claims (4)

1, lucite drawing T-square of being made up of chi head (1), main scale (2), the inner chamber that it is characterized in that main scale (2) be by secondary chi club head (3), secondary chi bar (4), secondary chi bar afterbody (6), the secondary chi mechanism that secondary chi (5), spring body (7), screw (8) are formed.

2, by the described T-square of claim 1, it is characterized in that secondary chi mechanism can be contained on the secondary chi bar by a joint or the secondary chi of more piece, the tight-lipped close fit of emboss pit is arranged between secondary chi and the secondary chi, can slide.

3, by claim 1 or 2 described T-squares, it is characterized in that two above rectangular windows are arranged on the secondary chi of every joint (5), on the secondary chi bar in its relevant position (4), the protruding nail of location eccentricity (12) is housed, one or many spring bodies (7) are housed between secondary chi (5) and the secondary chi bar (4).

4, by claim 1 or 2 described T-squares, it is characterized in that main scale (2) and secondary chi club head (3), the breach by the band inclined-plane is stayed in the relevant position, below of secondary chi bar (4), breach one side is equipped with roller (11) in main scale (2) below, steel disc (10), screw (9), the forced locking device that axle (13) is formed.

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