JPH05231805A - Planimeter - Google Patents

Abstract

PURPOSE:To obtain a planimeter which is compact as a whole, has a large measuring extent, and can be easily assembled by attaching its main frame to an axle supporting body supporting a wheel for measuring distances in X-axis direction in a state where the main frame can swing in Y-axis direction. CONSTITUTION:Firstly, an input button 22 is pressed after aligning the aiming point 21 of a lens 20 with a measuring point in a drawing to be measured by moving a measuring rod 4. As a result, the coordinates of the measuring point are inputted as a measuring origin. Then, after aligning the aiming point 21 with the next measuring point by swinging a main frame 3 and rod 4 in Y-axis direction while a supporting body 2 is rolled in X-axis direction, the button 22 is again pressed. When the button 22 is pressed, encoders 5 and 7 respectively measure the moved amounts of the supporting body 2 in X- and Y-axis directions from the rotational angle of a wheel 1 and from the swung angle of the main body 3 and a microcomputer 9 calculates the coordinates from the measured results. Thus the coordinates of measuring points are successively inputted. When an end button 23 is finally pressed, the computer 9 calculates the outline length, area, etc., of a picture and displays the calculated results in a displaying section 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planimeter for measuring an area or a distance while tracing a figure.

[0002]

2. Description of the Related Art In general, a punilater is used to measure the area and line length of a figure. This planimator has a measuring rod swingably attached to a body containing a battery, an encoder, various switches and the like. Along with this, wheels are provided on both sides of the body, the swing angle of the wheel and the measuring rod with respect to the body is measured through an encoder to measure the coordinates of a predetermined point of the figure, and the outer line length of the figure is based on these coordinates. And the area etc. are measured.

An apparatus of this type is disclosed in Japanese Patent Laid-Open No. 60-135.
There is a planimeter disclosed in No. 802.

[0004]

However, in this planimeter, the wheels are mounted on both sides of the body, and most of the necessary components such as a battery for measurement, an encoder, a counter, and a display device are loaded in the body. Since the measuring rod is extended from the body, the body becomes large, and if the length of the measuring rod is large, the whole body will be large due to the large body, and precision is required for the body. It is necessary to attach the wheels to be processed, and the processing and assembling are complicated.

In view of the above points, the present invention has an object to provide a planimeter which is compact in size, has a wide measurement range, and is easy to assemble.

[0006]

According to the present invention, there is provided a car bearing body supporting a wheel for measuring a distance in the X-axis direction, and a main body frame attached to the car bearing body so as to be swingable in the Y-axis direction. When,
A measuring rod attached to the main body frame, and a lock device provided at a connecting portion between the car bearing body and the main body frame for fixing the main body frame to the car bearing body or allowing the body frame to swing. did.

[0007]

A car bearing body having wheels on both sides and a body frame having a measuring rod are separately provided, and the body frame is swingably attached to the car bearing body through a locking device. At the time of use, the lock device is released to allow the body frame to swing freely with respect to the car bearing body,
The aiming point of the measuring rod is set to a predetermined position on the figure, and its coordinates are calculated by calculating the rotation angle of the wheel of the car bearing body and the swinging angle of the main body frame including the measuring rod. Based on each coordinate point, the outline length and area of the figure are calculated.

[0008]

1 and 2 for explaining an embodiment of the present invention with reference to the drawings, a planimeter M of the present invention comprises a car bearing body 2 having wheels 1 and 1 rotatably held at both ends. The main body frame 3 is swingably connected to the receiving body 2 in the axial direction thereof, and the measuring rod 4 is extended to the main body frame 3 in the axial direction of the main body frame 3.

An encoder 5 for detecting the rotation angle of the wheel 1 of the car bearing body 2 is housed. Further, non-slip rings 6 and 6 are provided around the wheels 1 and 1 to prevent slipping. The car bearing body 2
Rotatably supports an axle (not shown) having wheels 1 and 1 on both sides.

The main body frame 3 has a substantially rectangular box shape, and the main body frame 3 for the car bearing body 2 is formed therein.
An encoder 7, a battery 8, a microcomputer 9 and the like for detecting the swing angle of the device are housed, and various mode buttons 10, 10, ... Is provided.

An aiming lens 20 is provided at the tip of the measuring rod 4, an aiming point 21 is displayed at the center thereof, and the aiming point 21 is aligned with a predetermined measuring point of a figure to be measured, and the coordinates of the measuring point are set. Is calculated. In the vicinity of the aiming lens 20,
The input button 22 for inputting the calculation result of the coordinates of the measurement point into the calculation device, and after calculating the coordinates of the predetermined measurement point of the figure to be measured, the length and area of the outline of the figure are calculated. An end button 23 is provided for this purpose.

A joint portion J between the car bearing body 2 and the body frame 3
Is fixed to the car bearing body 21 as shown in FIGS.
A joint substrate 30 extending in a direction orthogonal to the vehicle bearing body 2 is provided, and a lower end of an encoder shaft 31 of the encoder 7 housed in the main body frame 3 is fixed to the tip of the joint substrate 30. The main body frame 3 swings around. In the vicinity of the car bearing body 2 of the combined substrate 30,
A lock hole 32 for locking the main body frame 3 with respect to the combined substrate 30 is formed, and tapered ends of adjusting screws 33, 33 are exposed from the left and right of the lock hole 32. It is screwed into 31 and rotated by a tool 34 so that the amount of projection into the lock hole 32 can be adjusted.

On the other hand, on the side wall of the main body frame 3 on the side of the car bearing 2, a support plate 40 extends above the combined substrate 30, and the main body frame 3 is fixed to the combined substrate 30 on the combined substrate 30. A locking device L is provided for this purpose. As shown in FIG. 6, the lock device L includes a lock bar 41. The lock bar 41 is urged downward by a coil spring 42 provided around the lock bar 41, and the lower end of the lock bar 41 is 30 degrees.
The main body frame 3 is locked on the combined substrate 30 by engaging with the lock holes 32 of 1.

As shown in FIGS. 4 and 5, on the support plate 40, the lock bar 41 is disengaged from the lock position where the lock bar 41 is coupled with the lock hole 32 and the body frame 3 is swingable. A restriction tube 43 is provided to restrict the open position of the cylinder. The restriction cylinder 43 is provided with slits 44, 44 at positions corresponding to the diameter line thereof, and shallow recesses 45, 45 are provided on the diameter line substantially orthogonal to the diameter line.

On the other hand, a knob 50 is provided at the upper end of the lock bar 41, and two engaging projections 5 that engage with the slit 44 and the recess 45 are provided at the lower end of the knob 50.
1, 51 are formed. Then, the main body frame 3 is locked by gripping the knob 50 and engaging the projection 51 in the slit 44 and lowering the lock bar 41, and the knob 50 is lifted and the projection 51 is taken out from the slit 44 to 90 degrees. When the lock bar 41 is rotated and engaged with the recess 45, the lower end of the lock bar 41 comes out of the lock hole 32, and the main body frame 3 can swing.

Hexagonal tool receivers 33a, 33a are formed at the rear end of the adjusting screw 33. A tool 34 is inserted into the hexagonal tool receivers 33a, 33a to rotate the adjusting screw 33 to rotate the adjusting bar 33.
The position for holding the lower end of the main frame 3 is moved slightly.
The lock position for locking the position, that is, the position (origin) of the aiming point of the aiming lens 21 at the tip of the measuring rod 4 is adjusted (FIGS. 7 and 8). That is, these adjusting screws 33 cooperate with the lock bar 41 of the lock device L to form the origin fine adjustment device A for adjusting the origin in the axial direction.

Next, the operation of the planimeter of the present invention will be described. As shown in FIG. 9, when measuring a modified pentagon, the measurement is started from the fulcrum A and the measurement points B, C, and D are measured.
The coordinates of E and E can be obtained, and the length and area of the outline can be obtained.

First, fine adjustment of the origin in the Y-axis direction is performed based on the test chart. When the planimeter is not used, the body frame 3 is locked on the coupling substrate 30 with the origin finely adjusted.
Is gripped and rotated to release the main body frame 3. At this time,
The power is turned on and the device is ready for measurement. In this state, the aiming point 21 of the lens is aimed at the measuring point A of the measurement pattern with the measuring rod, and the input button 22 is pressed. As a result, the coordinates of the measurement point A are input as the measurement origin. Then, the receiver 2
While rolling on the right side in the figure (X-axis direction), the body frame 3 and the measuring rod 4 are swung in the Y-axis direction to aim the aiming point 21 at the measuring point B and press the input button 22. At this time, X
For the amount of movement in the axial direction, the rotation angle (number) of the wheel 1 is measured by the engoder 5, and for the amount of movement in the Y-axis direction, the swing angle is measured by the encoder 7 in the main body frame 3. The microcomputer calculates from the measured distance between the encoder shaft 31 and the aiming point 21. Thereby, the coordinates of the measurement point B are obtained and input into the arithmetic unit, and the coordinates of the measurement points C and D are sequentially input in this manner. When the end button 23 is pressed after finally inputting the coordinates of the measurement point E, the microcomputer calculates the outline length, area, etc. according to the mode selected by the mode button, and displays the calculation result on the display unit 11.

[0019]

According to the present invention, the vehicle bearing body 2 provided with wheels and the main frame 3 having the measuring rod 4 on which various components are loaded are molded separately, and are locked at the connecting portion. Since the main body frame 3 also has a function as a measuring rod by being freely combined, the measurement range in the Y-axis direction is widened, and the entire apparatus can be configured compactly and the molding process is easy.

[Brief description of drawings]

FIG. 1 is a plan view of a planimeter of the present invention.

FIG. 2 is a side view of the planimeter of the present invention.

FIG. 3 is a perspective view of a connecting portion between a car bearing body and a main body frame.

FIG. 4 is a partial perspective view of a connecting portion between a car bearing body and a main body frame.

FIG. 5 is a perspective view of a restriction cylinder of the coupling portion of FIG.

FIG. 6 is a perspective view of a lock bar.

FIG. 7 is a structural diagram of an origin fine adjustment mechanism.

FIG. 8 is an explanatory diagram of an adjusting action of the origin fine adjusting mechanism.

FIG. 9 is an operation explanatory view of the planimeter of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wheel 2 ... Car bearing body 3 ... Main body frame 4 ... Measuring rod 20 ... Aiming lens 21 ... Aiming point 30 ... Coupling substrate 32 ... Lock hole 41 ... Lock bar

Claims (2)

[Claims] 1. A car bearing body supporting a wheel for measuring a distance in the X-axis direction, a main body frame attached to the car bearing body so as to be swingable in the Y-axis direction, and attached to the main body frame. A planimeter comprising: a measuring rod; and a lock device that is provided at a connecting portion between the car bearing body and the main body frame, and that locks the main body frame with respect to the car bearing body so as to be swingable. .. 2. An origin fine adjustment device for finely adjusting the origin in the Y-axis direction of the measuring rod in cooperation with the lock device is provided at the joint between the vehicle bearing body and the main body frame. The planimeter according to claim 1, wherein: