FR2706931A1 - - Google Patents

Abstract

Telescopic string support ruler made up of square telescopic tubes whose female part is split along its length and at an angle to allow the maneuver shape of the male part to pass. Each end is fitted with a synthetic rubber tip into which the cord support hooks are inserted; these have the following features: - not to project from the profile of the rule, - to be able to use the rule indifferently in re-entrant or salient angles. - To leave a space receiving the cords produced by the converging faces and vis-à-vis the end piece and the hooks, this convergence ensures effective wedging of the cords.

Description

1-f 2706931

  TELESCOPIC RULES CORDEAUX SUPPORTS

  Many models of rules, extensible or not, exist on the market and allow the craftsman plasterer to maintain a horizontal line between two rules positioned at

  ends of a partition to be made; this cord serves as a guide for laying bricks.

  Some rules consist of one-piece elements and, therefore, must be at the desired length. They are held between the ceiling and the ground by a screw device called cylinder. Others are telescopic and adapt to a greater or lesser height of rooms. The telescopic part, immobilized in its sheath, the rule is

  blocked between the floor and the ceiling thanks to the pressure of a precompressed spring.

  The lower and upper end of these rules have ears or hooks that allow to vertically tighten a cord, it being used to support, all-in-long

  of the evolution of the construction, the horizontal cord guiding the laying of bricks

  building blocks. These hooks or ears are arranged on two perpendicular faces of the rule. This does not allow the proper positioning of the cords for so-called protruding angles. On the other hand, the current telescopic rules do not allow a very large room dimension, the operator must have access, simultaneously, to the extensible part to raise it, the foot located on a pedal at the bottom part exerts the pressure serving compressing the spring required for locking between the floor and the partition, and the other hand positioned in front of the blocking in order to immobilize the desired dimension. It is clear that the dimensions of the rules must be

  concordance with the average heights of the operators who use them.

  The document FR. 2,507,653 discloses a telescopic ruler.

  The present invention aims to overcome the above disadvantages.

  In order to allow the operator, whatever his size, to be able to reach and act on the telescopic part of the ruler, the latter consists, for its female part, of square tubes split at an angle, which thus allows the passage of a form of grasping

  integral with the male part sliding inside the female part.

2 2706931

  This form of gripping is located in the lower part of the male part and is secured to it, so it is easy for the operator, after unlocking the two parts, to raise the male part by lifting this form of grip, the operator having the foot pressed against a horizontal form secured to the female part and compressing the spring cylinder located in the lower part of the same female part. It will suffice, when the desired size is reached, that the operator blocks the male part relative to the female part through the eccentric device located in the upper part of the female part. This eccentric device, by action on a lever, allows either to separate or bring closer the two faces located on either side of the vertical slot of the female part. The integral gripping form of the male part also serves as a limit limiter fmin of stroke in the upper part abutting against the eccentric locking device, this ensures a minimum grip inside the female part and thus avoids same, a bending of the male element by

relative to the female element.

  On the other hand, this rule is equipped with two rubber tips located at each end; on the male part with regard to the upper part, and on the spring cylinder, in the lower part. These tips have recessed shapes on three vertical edges. In these hollows, there appear metal parts serving as hooking ears or hooks for cords. These provisions make it possible, on the one hand, not to have the hooks or ears protruding from the general profile of the rule, thus eliminating the fragility of the latter, on the other hand, to allow effective blocking of the cords. in these forms since a part is metallic and therefore rigid; the other part, that is to say, the tip being a plastic or flexible element synthetic rubber type. These tips also serve to protect the high and low bearing surfaces when using the rules in constructions already completed and finished, for example during

renovation, extension.

  The present invention is represented by the various views below: Figure 1: perspective view of a telescopic ruler on the locking side, guide slot

and support corner.

3 2706931

  55. Figure 2: perspective view of a telescopic ruler, view side hooks or ears for cords.

  Figure 3: sectional view of a telescopic ruler.

  Figure 4: eccentric blocking cut.

  Figure 5: Perspective showing a rule in situation when executing an angle

salient wall.

  Figure 6: cross-section at the tip showing the position of the cord

for the salient angles.

  Figure 7: Perspective showing a telescopic ruler in use for a re-entrant angle. 65. Figure 8 cut at the tip showing the position of the cord for the re-entrant angles. Figure 9 Longitudinal section of a mouthpiece showing hollow forms and ears

  or metal hooks embedded inside.

  According to FIG. 1, the telescopic rule consists of a female part 1 in which a male part 2 slides. This female part comprises a blocking element 4 situated at its upper part and at its lower part with a support wedge. 5. Still according to Figure 1, the female part i is equipped with a tip 3 at its lower part, the part

  male 2, meanwhile, is equipped with a tip 3 at its upper part.

  In Figure 1, we can see the vertical slot 6 made in an angle of the female part 1. In this slot, can move the gripping form 7 integral with the

sliding part 2.

  Figure 2 shows the position of the hooks or ears receiving the cords arranged

  following three vertical edges of the tips 3 located at each end of this rule.

  Figure 3 shows in longitudinal section all the main elements of this rule. The male part 2 slides in the female part 1 and comes at the end of the low stroke to bear on a stop 8, this stop 8 being secured to the support wedge 5. The bearing wedge 5, integral with the female part 1, allows the operator, by exerting a foot pressure down, to compress the spring 9. This spring, while relaxing, will ensure, by

  pressure, blocking the ruler between the floor and the ceiling.

4 2706931

  FIG. 4 shows in section, the male part in the female part locked by an eccentric device 4, this device serving to bring the faces 1a and 1b closer to the male part 2, this approximation being possible thanks to the slot 6 made in the angle of this female part. Still according to this view 4, we clearly see the gripping form 7 integral with the male part 2 coming into abutment at the top on the locking device 4. This arrangement ensures, as previously described, a minimum fitting of the male part 2 by report the female part 1 of the rule; on the other hand, avoids the male part

  to escape unexpectedly to the female part during transport or handling.

  FIG. 5 shows the position of the ruler for the execution of a salient angle and clearly indicates the use of the hooks or ears located in the end pieces 3 at each end of

this same rule.

  FIG. 6 shows, in section, the end piece 3 highlighting the hooks or lugs 10, 11, 12 emerging from the recessed shapes 13 formed in this same end piece 3. These hooks or ears do not exceed the outer profile of this endpiece 3. The position of the hooks or lugs 10, 1, 12, inside the end piece 3 thus allows a position of the vertical cord 16 always offset with respect to the outline of the partition, this offset between the horizontal cord 17 and the partition bricks being necessary to the operator for good

align its construction.

  Figure 7 shows the use of a telescopic ruler when constructing a partition at a re-entrant angle. At this moment, the user uses the hooks or ears, pins 10, 11, 12 to fix his vertical cords 16 supporting the cord

  horizontal 17 allowing straightness of construction.

  FIG. 8 clearly shows, in the cut of the tip 3, the position of the cord on the hooks 11 and 12, and it is also clearly seen that the hooks 11 and 12 allow the cord to be offset by a few millimeters from the line theoretical of the partition,

  which facilitates the placement of the brick elements and their alignment.

2706931

  Figures 6, 8 and 9 show the blocking principle of the vertical cord 16 between the hooks 10, 11 and 12 and the tip 3. This tip 3 is made of soft materials synthetic rubber type or the like. The hooks are metallic so offer a rigid part. These same hooks have an inclined face 15 whose inclination is different from that 14 of the buffer 3. These inclinations 14 - 15 will, by moving towards the bottom or towards the axis of the hooks 10, 11 and 12. These two inclinations concurrently allow to wedge well the vertical cord 16 since pulling on it, it is automatically caught between the flexible part of the tip 3 and the rigid part of the

hook 10, 11, or 12.

6 2706931

Claims (3)

  1. Telescopic ruler consisting of a male part 2, of square section sliding and lockable in a female part 1 tubular, also square, characterized in that the female part 1 constituting the lower part of the rule is slotted over any length in an angle; this slot passing the gripping form 7 of the male tube 2 sliding inside. This form of grip 7 serving to slide the part   male relative to the female part.   This telescopic rule comprises, at each end, a tip 3 of synthetic rubber in which are inserted the metal hooks 10, 11 and 12, supports of   vertical line and creating no protrusion with respect to the profile of the rule.   2. telescopic rule according to claim 1, characterized in that the ends 3 of synthetic rubber each have three hooks 10, 11 and 12 supports vertical cord to be arranged indifferently in the re-entrant angles and in the salient angles.   3. Telescopic ruler according to claims 1 and 2 characterized in that the faces   inclined hooks 10,11 and 12 have a different inclination of the inclined faces 14 of the buffer 3 receiving these hooks. These inclinations are concurrent in order to allow   a wedging of the vertical chalk 16.