CN2109545U

CN2109545U - Perimeter measuring rule

Info

Publication number: CN2109545U
Application number: CN 92200738
Authority: CN
Inventors: 李希平
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-01-18
Filing date: 1992-01-18
Publication date: 1992-07-08

Abstract

The utility model discloses a perimeter measuring rule which is a measuring instrument used to measure the perimeter and the diameter of a cylindrical object, comprising a mother rule and a vernier. The mother rule is a flexible rule which can be curved, and the upper and the lower sides of the mother rule are provided with a perimeter rule and a diameter rule which have the metric graduation. The vernier is in a plate shape, the upper and the lower sides of the vernier are respectively provided with the vernier graduations with different precision. The zero points of the perimeter rule and the diameter rule and the start point of the vernier graduation are all positioned at the connection point of the mother rule and the vernier, and the verniers at the left and the right side of the vernier graduation are respectively provided with a penetrating-in hole and a penetrating-out hole of the mother rule which are mutually in parallel. The utility model has the advantages of artful structure, convenient operation, little error and high precision. The utility model is particularly suitable for measuring the perimeter of a bigger cylindrical object.

Description

Perimeter measuring rule

The utility model relates to a kind of be used to the measure girth of cylindrical object and the measurer of diameter.

In producing and living, often running into needs to measure the girth of cylindrical object and the situation of diameter, particularly in the processing and checkout procedure of product, often need the girth of the larger-diameter cylindrical work of duplicate measurements (as gas cylinder) and diameter and require certain measuring accuracy.In the prior art, measurement is adopted the ordinary steel tape measure than the girth and the diameter of large diameter cylinder type object more, the both sides of this steel tape have girth chi and diameter chi respectively, though also can directly measure the girth and the diameter of object, but girth chi and diameter chi must misplace during owing to measurement, cause system errors for measurement very big, precision also can not get guaranteeing.In addition, the ordinary steel tape measure uses also convenient inadequately, is difficult to measure the actual diameter or the girth of cylindrical object.

The purpose of this utility model is the circumferential measurements chi of a kind of easy to use, measuring error is little, precision is high cylindrical object of design.

To achieve these goals, the utility model adopts the flexible mother chi and the rigidity vernier of working in coordination to constitute a kind of circumferential measurements chi, on vernier, have with the wide female chi of female chi and penetrate the hole and pass the hole, during measurement female chi passed successively and penetrate the hole and pass the hole, make girth chi and the unlikely dislocation of diameter chi, thereby conveniently use and reduce systematic error; Meanwhile, utilize the principle of vernier caliper, be carved with the vernier graduation of different accuracy, thereby improved the measuring accuracy of circumferential measurements chi in the both sides of vernier.Be described in further detail below in conjunction with the technical characterictic of specific embodiment the utility model circumferential measurements chi.

Accompanying drawing 1 is the structural representation of the utility model circumferential measurements chi.

With reference to the accompanying drawings 1, the utility model circumferential measurements chi mainly is made of female chi 1 and vernier 2.The tape of female chi 1 for curling, the one end is connected in the central authorities of vernier 2 bottoms, and the other end is a free end.The both sides up and down of female chi 1 end face have girth chi 3 and the diameter chi 4 by the metric system scale respectively, are the tie point 5 of female chi 1 and vernier 2 zero point of girth chi 3 and diameter chi 4.Vernier 2 is plate shaped, its width is greater than female chi width, both sides have the vernier graduation 6 and the vernier graduation 7 of different accuracy respectively about its end face, the tie point 5 of the starting point of vernier graduation that is female chi 1 and vernier 2, the left and right sides of vernier graduation has female chi parallel to each other and penetrates hole 8 and pass hole 9, and the width that penetrates hole 8 and pass hole 9 equals the width of female chi 1.

Free end with female chi during use penetrates penetrating the hole and passing the hole on the vernier successively, make the circumferential measurements chi circularize and be inserted in the measuring point of measured object, strain outer wall that the free end of female chi makes female chi be close to measured object and can directly read the girth and the diameter of measured object, the method of reading is identical with the number reading method of common calliper, at the girth of duplicate measurements like product and diameter and when requiring the tension condition of female chi identical, can set up a spring balance that is easy to dismantle at the free end of female chi, for the convenience of reading, also can be at the subsidiary lighting device that can local illuminate scale of vernier end face.

The utility model structure is ingenious, easy to use, and measuring error is little, precision is high, is particularly suitable for measuring the girth and the diameter of the bigger cylindrical object of diameter.

Claims

1, a kind ofly is used to measure the girth of cylindrical object and the measurer of diameter, it is characterized in that it is to be made of the female chi and the vernier of working in coordination, the tape of described female chi for curling, the one end is connected in the bottom center of vernier, the other end is a free end, the both sides up and down of tape end face have respectively by the girth chi of metric system scale and diameter chi, the tie point that is female chi and vernier zero point of girth chi and diameter chi; Described vernier is plate shaped, its width is greater than female chi width, both sides have the vernier graduation of different accuracy respectively about its end face, the starting point of scale is the girth chi on female chi and the zero point of diameter chi, the left and right sides of vernier graduation has female chi parallel to each other and penetrates the hole and pass the hole, and the width that penetrates the hole and pass the hole equals the width of female chi.