JP3201693U - measurement tool - Google Patents

Abstract

To provide a measuring instrument in which the length measurement dimension is made variable in a relatively easy and universal manner. In order to be able to make the measurement length variable, it is a specification that includes a highly accurate expansion and contraction mechanism on both the left and right ends of the measuring tool, and further, a measurement instrument that directly measures the length measurement value, A slide part 2 including a slidable body 9 that expands and contracts in multiple stages and is slidable on the stretchable body 9, and when the slide part 2 slides, the stretchable body 9 expands and contracts when the slide part 2 is in the initial state. It includes a display unit 4 that displays the sum of a predetermined length of the measuring instrument corresponding to the expansion / contraction state of the body 9 and the length of sliding of the slide unit 2. [Selection] Figure 1

Description

  The present invention relates to a measuring instrument for measuring a dimension of an object or a certain area.

  As a measuring instrument having a relatively large size and good accuracy to some extent, a measurement tool called a long caliper or a bar gauge is first imaged.

JP 2006-112883 PR

Long calipers cannot measure more than the longest measurement capability of calipers themselves, and must use a different model for measuring longer lengths. Moreover, as is the case with all long calipers, it is quite expensive in terms of price. Also, when measuring a dimension that is not as long as the left, there is a problem in having the long caliper always work with the hand. In addition to the weight, it is expensive and sometimes inconvenient for measurement. Of course, in practice, it is general to prepare various types of measuring instruments having an appropriate length. Also, the bar gauge described later has the same measurement ability range as that of the gauge, and it is the same in that a length measuring device suitable for each measurement object must be prepared. An object of the present invention is to provide a measuring instrument in which the length measurement dimensions can be changed relatively easily with respect to these problems.

  Adopting a mechanism that makes the measuring length ability variable in the short measuring instrument body, specifically, incorporating a mechanism that enables the specified dimensions to be expanded and contracted accurately in the mechanism part that constitutes the measuring element, It is also a proposal that devised a method that allows direct reading of measurement dimensions regardless of the presence or absence of expansion and contraction. Although the details will be described later, this method makes it possible to hold the capability of several times the measurement length.

  The measuring element expansion / contraction method itself is a method that can be conceived relatively easily, and such products already exist. For example, as a tool for measuring the height from the floor to the ceiling, there is a product called a major pole, but this product can read the measured value directly, but the accuracy of the left is not good in terms of measurement accuracy The accuracy is at most ± several millimeters. In that respect, the method of the present invention is characterized by applying a high-precision expansion / contraction mechanism as a method for improving accuracy, and making it possible to directly read measurement values regardless of whether there is expansion / contraction. . The analog caliper method (= the method using the main and vernier scales) is capable of high-precision measurement and direct reading of 0.1 mm or less only with respect to the length where the scale exists. In order to expand the area, even if a probe as an attachment is added, it is necessary to mentally add the extension length of the attachments to the reading of the measurement dimension value, that is, direct reading is not possible There was a drawback of end. The trade name “inner bar gauge” or “inside vernier caliper” is exactly the same as the prior art, but the present invention devised a method for clearing this point. Details will be described later.

The measuring instrument of the present invention is a length measuring instrument,
A short scale with a measurement function is used as the main body of the measurement function unit.
By combining the scale and the elastic function member of the mechanism having high rigidity and high accuracy,
It is possible to cope with the object to be measured that exceeds the effective measurement length of the scale by appropriately extending and contracting the contraction mechanism, and then operating according to the measurement rules. As a result, the measurement value itself can be directly read as a result.

The present invention
Includes an elastic body that expands and contracts in multiple stages,
A slide part slidably provided on the stretchable body;
When the slide part slides, there is a first mode in which the elastic body expands and contracts,
The stretchable body has a mounting portion on which a long body of a predetermined length can be mounted,
A first sum of a length of a predetermined portion of the measuring instrument according to a stretched state of the stretchable body when the slide portion is in an initial state and a length of sliding of the slide portion, and a length according to the first sum And a display unit for displaying a second sum of the length of the elongated body.

In the present invention,
There is a second mode in which the elastic body does not expand or contract even when the slide part slides,
The first mode and the second mode can be switched.

In the present invention,
The display unit is an analog scale,
When the slide portion is in an initial state, the analog scale displays the length of a predetermined portion of the measurement instrument in the initial state,
When the slide part slides, the analog scale can display the sum of the length of the predetermined part of the measurement instrument in the initial state and the length of the slide part slid.

In the present invention,
The display unit is a digital scale,
When the slide unit is in an initial state, an input unit for inputting a length of a predetermined portion of the measurement instrument in the initial state is provided for the digital scale.
When the slide part slides, the digital scale can display the sum of the length of the predetermined part of the measurement instrument in the initial state and the length of the slide part slid.

  It is possible to provide a measuring tool that can be highly accurate and the measurement length can be varied and the measurement value can be directly read. Because it is an expansion and contraction system, it can measure even long objects to be measured, and at the same time, it can be compact in the storage package at the end of measurement, and should be light in weight. I can do it. Depending on the shape of the probe, in addition to the usage limited to the length measurement, for example, a usage such as a compass is possible.

Image of measuring tool when the outline of the present invention is applied to an analog inside length measuring instrument Fig. 1 Image of actual measurement in the method In the system shown in Fig. 1, the image when the right end of the measuring tool is extended In the system shown in Fig. 1, when the telescopic attachment is attached to the left end of the measuring tool Illustration of scale printing surface of square pipe Example of main scale scale printing layout design Image of the essence of the present invention applied to an inside length measuring instrument using a digital linear scale Image diagram when the outline of the present invention is applied to a normal M-type caliper In the image device of FIG. 8, the image when the telescopic part is extended

First, the images shown in FIGS. 1 to 7 are drawings in which the present invention is imaged mainly for measuring the inside dimension. Drawings 8 and 9 are explanations of application examples when applied to a normal known M-type caliper as another application. I will refuse that first.
Referring to FIG. Reference numeral 1 denotes a short length measuring device main body. In FIG. 1, it is explanatory drawing at the time of employ | adopting the length measurement reading system similar to the technique of analog calipers which has a main scale and a subscale. However, a known M-type caliper external measuring jaw or internal measuring beak type measuring element is not provided, but if necessary, a member as a measuring element of the same purpose can be arranged. This is omitted in the description of FIG. The description when the present invention is applied to the caliper will be described later with reference to FIGS. Reference numeral 2 is a slider portion, reference numeral 3 is a main scale, and a member of reference numeral 3 is assumed to be a square pipe. The reason will be described later. Reference numeral 4 corresponds to a vernier measurement part (vernier), and is attached to the slider part of reference numeral 2 integrally. The slider and the vernier part become the reading part of the measured value. Since the resolution of the vernier part is assumed to be at least about 50 microns, as a result, a highly accurate measuring instrument can be obtained.

  Reference numeral 5 denotes an internal measuring probe at the right end, which has a structure that moves in conjunction with the slider during measurement. Reference numeral 7 denotes a member for connecting the slider (reference numeral 2) and the rightmost contact of reference numeral 5 through a block indicated by reference numeral 8. In FIG. As shown in the figure. Reference numeral 6 denotes an inner measurement probe at the left end, and the size is measured by bringing these two measurement probes into contact with the internal measurement site of the object to be measured. Since both contacts 5 and 6 can be measured with respect to the measuring tool having a length equal to or greater than the Min length (L1 size), it is desirable to finish the contact as short as possible. (The length described as L1 described below is intended to represent the length of the measuring tool when the slider is in a non-moving state.) However, on the other hand, the measured length of Max is sacrificed. It will end up. This is because the movable area (L2 dimension) of the slider is related to the measurement capability dimension. Therefore, the origin of the idea of the present invention as a method to compensate for both of these drawbacks will be described below.

  The main mechanism contents of the present invention are described below. FIG. 1 is a simplified diagram showing an overall image of the apparatus. It is preferable that the rightmost measuring element (reference numeral 5) has a structure that can be expanded and contracted when necessary. In FIG. 1, the expansion / contraction mechanism portion is simply illustrated by reference numeral 9, but, of course, a specified dimension (although L <b> 2 = L <b> 4) is extended with accuracy when extended. In this structure, the device is provided at the inner diameter portion of the pipe 3. The slide Max dimension (L2) is determined by the initial design length of the measuring tool. FIG. 2 is an image diagram when the slider is moved by a predetermined amount, and the L3 dimension is the amount of movement of the slider. The actual measurement actual size is LS (measured value) = L1 + L3. In FIG. 2, the reference numeral 5 is a measurement example in a state where the right end extension portion is not extended.

  FIG. 3 is an image diagram when the contact of reference numeral 5 is expanded by a specified amount. Starting from this state, the measured value is read by moving the slider. In FIG. 3, the slider is in the initial state of non-moving which is positioned at the left end, and the length of the measuring instrument is L1 + L4. (Extension amount). Although it is a point of L4 dimension, there is no way of defeating in terms of structure that it becomes a value shorter than L1 dimension. This is because it is convenient to provide the telescopic structure inside the pipe scale as the main scale. In practice, it is determined that it is appropriate to make the length 200 mm shorter than the L1 dimension. Moreover, although it is not a mast matter in design, it is determined that it is realistic to set the L1 dimension to a length that is an integral multiple of 100 mm. This is because it is judged that it is convenient to process the reading dimensions by making the L1 and L4 dimensions an integral multiple of 100 mm. (Details will be described later.)

  The expansion / contraction mechanism portion entangled with reference numeral 5 is preferably treated as a standard product of the measuring instrument of the present invention. On the premise of this, when summarizing what has been described above, L1 + L2 + L4 (= L2), that is, L1 + 2 × L2 dimension is the maximum measurement dimension of the measuring instrument of the present invention. In this explanation, an attachment is not used at the left end, and a user may desire a longer measurement capability depending on the user. The countermeasure is to improve the function of the measuring range by using an attachment at the left end.

  The contents described above with reference to FIG. 1 are based on the assumption that the leftmost probe (reference numeral 6) is not removed. However, if the member 6 is replaced with a telescopic extension rod or a fixed length extension rod, the maximum length measurement can be further expanded. The idea is to change the L1 dimension by extending the probe on both sides. There are two types of extension rod attachments for this part: a telescopic type and a fixed length type. An image diagram when the telescopic attachment (reference numeral 6-1) is introduced is shown in FIG. The actual structure should be judged to be similar to the image at the right end of FIG. However, since the reference numeral 6 or the attachments (reference numeral 6-1) to be replaced with it is of a nature that is integrally fixed to the square pipe of the reference numeral 3, it has a characteristic that does not contribute to the movement of the slurder of the reference numeral 2. It is. There are appropriate options for its utility and usage. The specific introduction explanation will be described later.

  However, in order to prevent the package size at the time of contraction from increasing by the length of the attachment that is added to the right side, it is preferable that the attachment can be removed with one touch at the end of the measurement.

  The above explanation was centered on the mechanical contents of the measuring tool, but the following details the method of reading dimensional measurement values when actually measuring and including the method at the time of introducing the attachment. I want to state. The actual measurement of the present invention is of a property that can be utilized for a dimension larger than the L1 dimension of the measuring tool, and the measurement origin of the slider portion (reference numeral 2) shown in FIG. 1 is from the length of the L1 dimension. Starting from the scale size (see Fig. 1). In the use example in which the right end code 5 is not expanded, the dimension L1 + L2 is read at the end position of the slider. The conventional measurement principle can be applied to the idea so far. However, in the case of the measuring device of the present invention, the measurement length is variable. That is, the right end probe (symbol 5) can be moved (L1 increases when there is no slide). Therefore, when the stylus is moved by a specified amount at the right end, it is necessary to devise a way to read the measured value by direct reading. This will be described below.

  Please refer to FIG. The portion on which the scale is printed is a square pipe of reference numeral 3. This figure is a view from the direction of the arrow A (see Fig. 1) of the measuring tool. I would like to express each surface as A, B, C, and D in the clockwise direction. In FIG. 1, it was set as the figure which provided the scale of 1 line on the A surface. However, in this scale, when the contraction portion is expanded, the L4 dimension (although this L4 dimension is the same as the L2 dimension) must be added to the reading value to perform mental calculation. However, even if the L2 dimension is set to an integer multiple of 100 mm, mental arithmetic errors can sometimes occur. The following is a description of methods and countermeasures that eliminate the need for mental arithmetic.

  Although it is determined that several scale printing methods exist, FIG. 6 will be described as an example. In FIG. 6A, the upper and lower scales are printed on the A surface of the square pipe (reference numeral 3). The display in FIG. 6A is a display when L1 is 500 mm and the L2 dimension is 300 mm. The upper scale is a scale on which 500 mm to 800 mm is printed, and the lower scale is a scale on which 800 mm to 1100 mm is printed. In this method, even when the probe (reference numeral 5) is extended, the lower scale may be read directly. However, it is preferable to provide a vernier (symbol 4) at the top and bottom in the slider portion of reference numeral 2. (In FIG. 1, it is refused that the main and sub-scales are shown as only one.)

  Next, as described above, as a countermeasure for a longer object to be measured, there is a means for introducing an attachment to the left end of the measuring tool. I would like to explain that case. The contact 6 is replaced with an attachment of another shape. Several types of thinking can be applied to this attachment.

  First, I would like to explain the case of introducing a telescopic attachment (reference numeral 6-1) to be introduced at the left end (see FIG. 4). Although this attachment is positioned as an optional part, it should be prepared as a semi-standard product in the measuring instrument body, and it should be a one-stage extension / contraction method. The reason for this is to make it easy to apply an algorithm for direct reading, as well as a complicated structure. The expansion mechanism at the right end is also a one-stage expansion / contraction method, for exactly the same reason. The total length of this is the same as the L2 dimension for which accuracy is ensured. When extended, the L2 dimension is twice as long as accuracy is ensured. FIG. 4 is an image diagram when the attachment (reference numeral 6-1) is attached in a state where the expansion and contraction is extended at the right end and not extended at the left end. Measurement is performed with this state as the initial time. Reference numeral 6-1 can be extended because it is a telescopic type, but the drawing in that state is omitted. Next, the reading of the measured value in this state will be described below.

  A method for directly reading the measurement value when the attachment 6-1 is introduced at the left end will be described. First, the L1 dimension is not 500 mm at the time of the initial design because the attachment 6-1 is attached later, and is longer. Although it is the description regarding it, the contact of the code | symbol 5 is extended at the right end. Then, the attachment 6-1 is attached to the left end. Then, the dimension when the changed L1 dimension is changed, that is, the L1-2 dimension is 500 mm + 300 mm + 300 mm = 1100 mm. With this state as the initial state, the slider is moved and measured. In this case, the initial measurement value of the measuring tool starts from 1100 mm and reaches 1400 mm. As an example of the measurement value direct reading scale at that time, a method of reading the upper printing scale of the C surface in FIG. 6 can be considered.

  Next, when the telescopic mechanism at the left end is extended, the changed L1 dimension is L1-3 (not shown in FIG. 4), but 500 mm + 300 mm + 600 mm = 1400 mm, and the reading scale is C plane. The bottom row will be read.

  In FIG. 1, the bottom surface of the slider (reference numeral 2) has a bottom plate, and the C-plane scale cannot be read with this as it is, but it is only necessary to make it possible. It is better to read the measuring instrument with the back side reversed. By doing so, the measuring ability of the measuring tool can be from 500 mm to 1700 mm. The front and back sides of the measuring tool are read on a case-by-case basis. I would like to add that when using the C-plane as a dimension reading location, a vernier portion is also necessary for this part.

  The case where attachment 6-1 at the left end is not a telescopic type but a fixed length type will be described. The reason for using this fixed length method is that the limit is 600 mm for the contraction type, but it is for the purpose of making the length even longer, and the measurement length should be compatible with lengths of 1700 mm or more. It is a countermeasure when required. In this case, I want to apply a fixed length of 1 meter or more.

  I would like to explain the reading dimensions in this case. First, the case where a fixed length of 1 meter is applied will be described. The premise must be able to measure continuously without interruption. Since it was possible to measure continuously up to 1700 mm, the target must be 1700 mm or more. This 1 meter long fixing rod is used at the left end by replacing it with a contact 6. In that case, at the right end, the contact 5 is not stretched. In this case, the changed L1 dimension of the measuring tool is 500 mm + 1000 mm = 1500 mm. The reading scale surface is plus 1000 mm by mental calculation with respect to the reading size of the upper scale of A. (The drawing illustrating the fixed-length attachment is omitted.)

  Next, when extended at the right end, the changed L1 dimension is 500 mm + 1000 mm + 300 mm = 1800 mm. In this case, the reading scale is plus 1000 mm to the reading of the scale on the lower side of the A plane. In this case, it is possible to measure from 1800 mm to 2100 mm.

  Furthermore, it is possible to cope with longer length measurement dimensions. In that case, if the length of the fixed dimension extension rod at the left end is replaced with a 1300 mm or 1600 mm length, continuous measurement numerical value reading is possible, and if the 1600 mm one is applied, a maximum of 2700 mm can be measured. . The reading scale is the upper scale of the C plane or the lower scale of the C plane. However, similarly, a numerical value of 1000 mm needs to be added to the dimension value of the reading scale. By taking the above measures, it is possible to obtain an article having a measuring ability from a minimum of 500 mm to a maximum of 2700 mm.

  There is also a measure in case you don't want to add 1000mmm mental arithmetic. In that case, an appropriate dimension scale may be printed on the B surface and D surface of the square pipe in the same manner as the A surface and C surface. In that case, it is necessary to disassemble the device so that the B side and D side can be directly read and reassembled. It is judged that it should be avoided to make the structure that can always read the A side, B, C, and D side without recombination, because it is considered to be not compact in design. The method of recombination and direct reading, or the method of adding and calculating 1000 mm plus can be arbitrarily selected.

If the measurement length is classified into items and classified in the case described above, the case is 1: 500 to 800 mm. No right end expansion (L1 = 500 mm), A-side upper scale Direct reading 2: 800 to 1100 mm Right end contact With 300 mm extension (L1 = 800 mm), A side lower scale Direct reading 3: 1100 mm 1400 mm Right end contact 300 mm extension, left end 300 mm attachment (L1 = 1100 m
c) Upper scale on the C plane Direct reading 4: From 1400 to 1700 mm The right end contact extends 300 mm, and the attachment extends to the left end 600 mm (L1 =
C-plane lower scale direct reading 5: 1500 to 1800 mm No right end extension, left end Fixed length 1000 mm attachment used (L1 = 1500 mm)
A side upper scale reading + 1000mm
6: 1800 to 2100mm Right end contact 300mm extension, left end 1000mm fixed attachment used (L1 =
1800mm) A side lower scale reading + 1000mm
7: In the case of 2100 to 2400 mm The right end contact is 300 mm extended, and the left end 1300 mm fixed attachment is used (L1 =
2100mm) C surface upper scale reading +1000
8: In the case of 2400 to 2700 mm The right end contact is 300 mm extended, and the left end 1600 mm fixed attachment is used (L1 =
2400mm) C-plane lower scale reading +1000
It turns out that.

  In the case of the length measuring cases from No. 6 to No. 8, if the added numerical values are all 1000 mm, the burden on the user is reduced. I would like to explain the following countermeasure plan as a measure for extending the measurement length of 1700 mm or more.

  In the measuring instrument described above, the shortest Min contraction dimension (L1 dimension) is set to a small dimension of 500 mm. If this is somewhat large, for example 700 mm, L2 is set to 500 mm. Even if a fixed length attachment is not used (only a telescopic attachment equivalent to the reference numeral 6-1), a maximum length measurement of 2700 mm is possible. I would like to list the relations such as the L1 dimension for each measurement length below.

Measurement length 1: 700 to 1200 mm No right end expansion, A side upper scale direct reading 2: 1200 to 1700 mm Right end contact 500 mm extension, A side lower scale direct reading 3: 1700 mm 2200 mm Right end contact 500 mm extension, left end 500mm attachment attachment (no expansion / contraction)
C-plane upper scale direct reading 4: From 2200 to 2700 mm The right end contact is extended by 500 mm, and the attachment is extended at the left end of 1000 mm.

As described above, it is possible to measure the internal measurement dimension having a length close to 3 meters relatively easily.
Even in this case, the fixed-length attachment is applicable. From the above explanation, a plan to make about two models would be effective.

  In the mechanical image diagram described above, the scale is printed on each side of the pipe. When the scale printed on the B side and D side is used with respect to the positional relationship with the slider, the part is read with one touch. Cannot be used for scale. In one example of the solution, the scale scale as an individual part separated from the element part of the measuring tool main body may be configured to be recombined with one touch each time.

  The measurement length reading method described so far is based on the analog caliper method main and sub measure, but of course, it can also be applied to the case of the digital length measurement method. In this case as well, it is possible to reflect the concept of improving the length measurement capability by making it possible to use the expansion and contraction mechanism, which is one point of the present invention, at both ends of the length measuring tool. In this case, a technique for printing the scale on each surface of the square pipe is not necessary, and the digital measuring scale is the main role in the length measurement principle (reference numeral 12). And the change of the L1 dimension by extension and the addition attachment can be easily reflected on the display. That is, the electronic processing function of the display device may be expressed as an offset function or a reset function, but an appropriate L1 dimension value may be recognized in each case. It will be very easy. This is the merit of the digital length measuring device.

  FIG. 7 is an image diagram of the specification of the present invention when a digital scale is applied. In this figure, it is the image figure which assumed the state which is not made to elongate in the right end part, and the time of attaching the attachment (code | symbol 6-1, length Lx) which is not made | formed in the left end part. Reference numeral 11 denotes a digital measurement value display (indicator). Reference numeral 12 denotes a scale. The illustrated method in this figure is a method in which the reference numeral 12 is slid. Reference numeral 13 denotes a connecting block A that slides on the surface of reference numeral 7-1 and is integrated with the scale. Reference numeral 14 denotes a connection block B for fixing the pipe and the indicator of reference 7-1 to the pipe. Reference numerals 5-1 and 6-1 have substantially the same properties as reference numerals 5 and 6 in FIG. 1, and these have a telescopic function. In FIG. 1, the member denoted by reference numeral 7 is a square pipe, but the reference numeral 7-1 has a pipe shape in order to have a structure that can accommodate the sign 5-1 therein, but may be a square pipe or a round pipe.

  Although it is safe to apply the same idea as the case of FIG. 1 to the L2 dimension regarding the length of the code | symbols 5-1 and 6-1, it is not necessarily restricted to it. This is because the input numerical value of the offset may be controlled even if it is shorter than the L2 dimension. However, if the length is longer than the L2 dimension, there is a problem that the continuity of the measured value is impaired. That point needs attention. Although the description of the product is limited to this level, the digital measuring system still has various advantages.

  The contents described above have been illustrated with an image of the measuring element itself in a shape suitable for measuring the inside dimension, but the measuring method of the present invention is of a property that can be used only for limited applications. It can also be applied to outside dimension measurement. As an example, I would like to explain using an ordinary M-type caliper as an example.

  FIG. 8 will be described. The measurement length of a normal known caliper is not variable, and the instrument itself can measure dimensions within a limited range related to the length of the length measuring device. However, if the present invention is applied, the measurement length can be made variable. FIG. 8 shows a case where the present invention is applied to a well-known analog M-type caliper and the expansion / contraction part provided in itself is used without being expanded. Reference numeral 15 denotes a main scale portion. A scale is printed on this upper surface, which is also a two-stage scale (reference numeral 16). Reference numeral 17 denotes a slider unit, which is a measurement numerical value interpretation unit (in the case of digital, a numerical value display). In this part, the right jaw and beak are integrated. Since FIG. 8 is an image of analog calipers, verniers (reference numerals 18 and 18-1) are installed at two places in the numerical value interpretation unit. Reference numeral 19 denotes a pair of left and right external measurement jaws, and reference numeral 20 denotes an internal measurement beak.

  Reference numeral 21 denotes a rigid body integrated with the left outer measurement and inner measurement jaws and beaks, and this part is the expansion / contraction body itself (expansion / contraction unit). Reference numeral 22 is a guide for a stretchable body integrated with the main scale of reference numeral 15. The full length dimension of the instrument in a state where the measurement instrument is not extended is L1. The dimension described as L2 is a slidable Max measurement dimension. When the scale is not expanded, the upper scale printed on the reference numeral 15 is read. For example, assuming a caliper with a nominal size of 200 mm, the upper scale starts printing from 0 mm and has a reading length of 200 mm + vernier. In the measuring instrument when the stretchable part is not extended, the relative relationship between the reference numerals 15 and 21 is a unitary object. That is, the movable part is only the numerical value interpretation part of the code | symbol 18 in the state mutually fixed.

  Next, FIG. 9 shows an image diagram when the stretchable part is extended. The portion of reference numeral 21 is extended to the left by a specified amount, and in that state, is fixed so as to be integrated with the main scale (reference numeral 15). The length of the instrument at that time is L1-5. In this state, a long object can be measured. Since it was called 200 mm vernier caliper earlier, in this case, a measurement capability of Max 400 mm is provided. In the extended state, the measuring ability of the measuring instrument is discontinuous, that is, measurement from 0 mm cannot be performed. The measurement range is 200 mm to 400 mm. Reading of the measured value is performed by reading the lower scale printed on the reference numeral 15. The lower scale starts from 200mm and is 400mm + Vernier reading length.

  L2 is the dimension that is normally extended, and in the case of a nominal 200 mm vernier caliper, it is exactly 200 mm. LS is an actual measurement dimension value, L3 is a slide amount, and LS = L3 + 200 mm. Since the slide amount of Max is 200 mm, that is, the Max measurement value is 400 mm. This idea is an embodiment of a caliper that can double the measurement length.

  The case where the present invention is applied to vernier calipers has been described above, and the expansion / contraction mechanism is provided as one element member of the vernier caliper itself, but this idea is applied to models of a certain length according to the policy. can do. However, the idea of retrofitting an expansion / contraction mechanism when necessary is also effective for long ones of 1M or more. In a state where the expansion / contraction mechanism is always held in the abdomen of the caliper body, the weight and the mechanism are not necessarily better. If this is taken into consideration, the telescopic portion may be retrofitted when necessary. In other words, it is a method of treating it as an option as an attachment part. I want to add that this method also exists.

  Although the case where the present invention is applied to the analog caliper has been described in FIG. 8, the present invention can of course be applied to a digital caliper. The printing method for the main scale unit described in analog is naturally irrelevant in the case of digital. When the expansion / contraction part is extended, the idea of offset (or preset) is introduced into the display method of the measured value. This is the same description as when it is described in detail when this plan is applied to a digital inside length measuring device.

  This embodiment has the following effects. Since the base member is composed of a short high-precision scale as the length measurement function unit main body and the high-precision and high-rigidity expansion and contraction mechanism unit, the first advantage is As described above, it is possible to provide a measuring tool that can be highly accurate, have a variable measurement length, and can directly read a measurement value. Secondly, because it is a telescopic method, it has the ability to measure even long objects to be measured, and at the same time it can be compacted in its stored packaging at the end of measurement, and light in weight. Can be. Thirdly, depending on the shape of the probe, in addition to the usage limited to the length measurement, for example, it is possible to use it like a compass.

  There are many cases where a relatively large size and high-accuracy measurement is required at various sites. In such a case, the measuring instrument according to the present invention greatly expands the place of operation. There is a merit that it can be transformed into a wide range of objects with high-precision measuring capability, and at the same time it can be stored in a compact package when stored.

Code 1 Analog length measuring instrument (with main and vernier)
Code 2 Slider code 3 Scale scale code 4 Vernier code 5 Right end probe code 6 Left end probe code 7 Linking bar code 8 Slider connection block code 9 Right end contact extension / contraction mechanism code 11 Digital indicator code 12 Digital scale (main scale)
Reference 15 vernier caliper main scale (analog caliper)
Reference numeral 16 Print scale mark 17 Measured value reading section = Slider code 18 Vernier code 19 Jaw code 20 Beak code 21 Telescopic unit code 22 Scale unit guide

Claims (4)

Includes an elastic body that expands and contracts in multiple stages,
A slide part slidably provided on the stretchable body;
When the slide part slides, there is a first mode in which the elastic body expands and contracts,
The stretchable body has a mounting portion on which a long body of a predetermined length can be mounted,
A first sum of a length of a predetermined portion of the measuring instrument according to a stretched state of the stretchable body when the slide portion is in an initial state and a length of sliding of the slide portion, and a length according to the first sum And a display unit for displaying a second sum of the length of the elongated body. In claim 1,
There is a second mode in which the elastic body does not expand or contract even when the slide part slides,
A measuring instrument capable of switching between the first aspect and the second aspect. In claim 1 or 2,
The display unit is an analog scale,
When the slide portion is in an initial state, the analog scale displays the length of a predetermined portion of the measurement instrument in the initial state,
When the slide part slides, the analog scale relates to a first sum of a length of a predetermined portion of the measurement instrument in the initial state and a length of the slide part slide, and the first sum. A measuring instrument for displaying a second sum of the length and the length of the elongated body. In claim 1 or 2,
The display unit is a digital scale,
When the slide unit is in an initial state, an input unit for inputting a length of a predetermined portion of the measurement instrument in the initial state is provided for the digital scale.
When the slide portion slides, the digital scale relates to a first sum of a length of a predetermined portion of the measuring instrument in the initial state and a length of the slide portion slid, and the first sum. A measuring instrument for displaying a second sum of the length and the length of the elongated body.

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