JPS60235004A - Automatic external dimension measuring apparatus - Google Patents

Abstract

PURPOSE:To improve working efficiency, by installing light source and light receiving element forming an optical axis between travelling spindle and fixed piece and an apparatus detecting existence of an object subject to be measured between travelling spindle and fixed piece by interruption of the optical axis. CONSTITUTION:The output signal of a dimension detector 28 detecting an external dimension of an object to be measured (not illustrated) held squeezed between travelling spindle and fixed spindle as that travelling with the travelling spindle is count-controlled by a counter-controlling circuit 60 for digital display on a display apparatus 50. Further, a detector 43 of the object to be measured detects interruption by the object of the optical axis, issues a travelling command to a motor driving circuit 65 from the main controlling circuit 58 and allows starting of measurement of the external dimension of the object to be measured. Further, an outside condition controlling circuit 63, controlling such outside conditions as temperature or source voltage, etc., removes influences of temperature or voltage, etc. affecting a display value.

Description

[Detailed description of the invention]

[Technical field to which the invention pertains] The present invention relates to an automatic outer dimension measuring device for automatically measuring outer dimensions of objects to be measured such as various machined parts. [Prior Art and its Problems] Generally, micrometers are widely used to precisely measure the outer dimension (outer diameter dimension) of an object to be measured. Manually measuring and inspecting a large number of objects individually using this micrometer is laborious, takes a long time, and is inefficient. Therefore, in most cases, a sampling inspection is sufficient. but,
Assembling precision machinery is expected to improve the precision of individual parts even more. Automation of measuring equipment has long been desired in order to quickly and accurately obtain results on the side of the object to be measured, but the higher the quality, the higher the price, and it was necessary to create a measuring equipment suitable for on-site inspection. there were. [Object of the Invention] In view of the above-mentioned points, the present invention effectively solves the problems and provides an automatic outer dimension measuring device that is easy to handle, has quick operation, and has improved measurement performance. With the goal. [Summary of the Invention] In order to achieve such an object, the present invention provides a light source and a light receiving element that form an optical axis between a movable spindle and a fixed spindle, and blocks the optical axis. The present invention is characterized by comprising a measured object detection device that detects that a measured object is interposed between the movable spindle and the stator. According to one embodiment of the present invention, the movable spindle and the stator have a planar contact end at the distal end, and the optical axis is provided on the axis of the movable spindle and the stator. According to another embodiment of the present invention, the movable spindle and the stator have a contact end having an arcuate cross section, and the optical axis is disposed along the axis of the movable spindle and the stator. According to yet another embodiment of the present invention, a sent member company,
A shielding plate formed parallel to the moving spindle is provided, and a plurality of sets of emitting elements and light receiving elements are arranged at required intervals in the axial direction of the moving spindle by sandwiching both sides of the shielding plate.

A measuring pressure selection device is provided, and by selecting any one of the light emitting element and the light receiving element, the measuring pressure applied by the elastic member to the object to be measured via the moving spindle is selected. According to still another embodiment of the present invention, the control arithmetic processing section selects and processes the return amount of the moving spindle. According to yet another embodiment of the present invention, the control arithmetic processing section determines whether the outer dimensions of the object to be measured are within upper and lower tolerance limits. [Embodiments of the invention]

Next, embodiments of the present invention will be described in detail based on the drawings. FIG. 1 shows a schematic configuration diagram of an embodiment of the present invention, (4)
is a front view thereof, (B) Fi is a plan view thereof, C1t;t is a side view thereof, and FIG. 2 is an enlarged view in the direction of the arrow A-A in FIG.
FIG. 3 is an enlarged view taken in the direction of the arrow B-H in FIG. 1; In Figures 1 to 3, the automatic outside dimension measuring device l
The main components are a base 2, a measuring unit box 3 having a mounting frame 5 provided on the base 2, an anvil 4, and a cover 3.
#I is formed from A etc. A guide plate 6 is fixed to the upper end of this mounting frame 5. The guide plate 6 is provided with a member to be sent 7 and a rotation stopper member 8 . As shown in FIGS. 2 and 4, the member 7 to be fed is attached to a feed nut 9, a ball holder 11 fixed to the feed nut 9 by a mounting screw 10, and held on the side surface of the guide plate 6 by the ball holder 11. It consists of a ball 12 and the like, and is provided so as to be movable in the front and back direction along the guide plate 6. Further, the feed nut 9 is provided with a female thread 13 and a small through hole 14. The rotation preventing member 8 includes a rotation preventing piece 15 shown in FIG. It can be moved freely in the front and rear directions. In addition, there is a company on the rotation stopper piece 15.
A through hole 16, a screw hole 17, etc. are provided. [Moving spindle] 8 has a through hole 1 with a rotation stopper piece 15 at one end.
6 and is fixed, and the other end is extended forward and pivotally supported by a bearing portion 19 of the mounting frame 5. Feed screw 20
has one end fixed to the h1 pulley 22 which is pivotally supported by the bearing part 21 of the mounting frame 5, and the other end is inserted into the movable spindle 18 formed in the shape of a vibrator. A belt 25 is stretched between the boo 922 and the pulley 24 of the drive motor 23, and transmits the rotation of the drive motor 23 to the feed screw 20. In addition, the stepped portion 26 of the moving spindle 18 and the member to be fed 7
An elastic member, in this example, a coil spring 2
7 intervenes. The dimension detection device 28 includes a scale plate 2 as shown in FIG.
9. Consists of a slit 30 provided close to the scale plate 29, a light emitting element plate 31, a light receiving element plate 32, etc. provided above the scale plate 29 and the slit 30. The scale plate 29 is usually made of organic resin glass and has a large number of checkered stripes arranged at equal intervals. One end is glued to the mounting piece 29A fixed to the rotation stopper 8, and the other end is attached as shown in FIG. Attach the mounting screw 33 to the moving spindle 18 as shown.
The main holder 34 is fixed to the main holder 34, and the arm part of the school holder 35 is fixed to the main holder 34 with the mounting screw 35A. It is fixed with the mounting screw 36, and the scale plate 2
9 and the slit 30tl - supports a light emitting element plate 31 and a light receiving element plate 32 which are arranged vertically facing each other. The slit plate 30 is provided with four lattice stripes whose phase is shifted by 1/4 step from that of the scale plate 29. Leaf spring 3
7A maintains contact between the slit plate 30 and the scale plate 29. The measuring soil selection device 38 includes a shielding plate 39 fixed to the side surface of the member to be sent 7 and forming a plane parallel to the moving spindle 18, a light emitting element plate 40 and a receiving plate sandwiching both sides of the shielding plate 390. It consists of an optical element plate 41. The light-emitting element plate 40 and the light-receiving element plate 41 include a plurality of sets, in this embodiment, three sets of light-emitting elements 4OA and light-receiving elements 41A (FIG. 2) facing each other with the shielding plate 39 in between. These light emitting elements 40A and light receiving elements 41A are connected to the moving spindle 1.
They are arranged 6 at a required interval in the axial direction of 8. The object detection device 43 includes a light source 44 installed within the anvil portion 4 and a light receiving element 45 installed within the movable spindle 18. The light source 44 and the light receiving element 45 form an optical axis on the axis of the fixed spindle 42 and the movable spindle 18. Therefore, when the object to be measured is inserted between the fixed spindle 42 and the movable spindle 18, the original shaft is interrupted. The mounting table 45 has an adjustment screw 45A that adjusts the height when placing the object to be measured. 47 is a power transformer for the drive motor 23 and other electrical equipment. , and 48 is a handle for transporting the measuring device 1. In addition, 49 is inserted into the small through hole 14 of the feed nut 9 with a connecting screw,
It is screwed into the screw hole 17 of the rotation stopper piece 15 to connect the sent member 7 and the rotation stopper member 8 . Next, FIG. 7 shows a cover display and an arrangement diagram of operating equipment. In the figure, the surface of the cover 3A includes a digital dimension indicator 50.1l111I fixed earth indicator lamp 51, return amount indicator lamp 52, upper/lower limit tolerance setting device 53, 54, indicator lamp 55, operation switch 56, and power switch 57.
etc. are arranged. Next, FIG. 8 is a block diagram of the control calculation processing section of this measuring device. In the drawings, parts having the same functions as those in FIGS. 1 to 7 are designated by the same reference numerals. The control arithmetic processing section includes a main control circuit 58, an arithmetic circuit 59, a counting control circuit 60, an external output circuit 61. It consists of a dimension detection device 28, a measurement pressure selection device 3B, a measured object detection device 43, a return amount selection device 64, a display device 50, a tolerance alarm device 62,
External condition control circuit 63 and motor drive device 65 are connected. Of these, the dimension detection device 28 detects the outer dimensions of the object to be measured held between the movable spindle 18 and the fixed spindle 420 as the amount of movement of the scale plate 29 that moves together with the movable spindle 18 through the slit 30 and the light emitting element plate 3.
1 and the light receiving element plate 32, and the counting control circuit 6
The count is controlled at 0 and digitally displayed on the display device 50. At this time, the external condition control circuit 63 controls external conditions such as changes in temperature or power supply voltage to eliminate the influence of temperature, voltage, etc. on the display value of the display device 50. The object detection device 43 has a flat contact surface at the tips of the movable spindle lfj and the fixed spindle 42, so when the optical axis is set on the axis and this optical axis is blocked by the object, the object to be measured is detected. Intervention is detected. The main control circuit 58 issues a movement command to the motor drive device 65 to measure the entire outer dimension of the moving spindle 18i and the object to be measured. Therefore, the measurement of the outer dimension of the object to be measured by the measuring device fiitl starts. Further, the measurement pressure selection device 38 can arbitrarily select a measurement ratio depending on the type of the object to be measured. That is, accurate dimensional measurement is possible by applying arbitrary contact pressure to the object to be measured by the moving spindle 18. Therefore, since the light emitting element plate 40 and the light receiving element plate 41 provided with the shielding plate 39 in between are provided with three sets of light emitting elements 40A and light receiving elements 41A arranged at predetermined intervals in the axial direction, for example, the shielding plate 39 1 closest to
When one set is selected and activated and the remaining two sets are deactivated, the member 7 to be sent after the moving spindle 1B contacts the object to be measured is the one set of light emitting elements 4 whose shielding plate 39 is closest.
It stops at the position where the OA and the light receiving element 41A are cut off. Therefore, the pressing force of the spring 27 is the smallest. On the other hand, if the set furthest from the shielding plate 39 is selected, the pressing force of the spring 27 will be the largest. This measurement pressure selection is displayed on the display lamp 51 by operating a push button switch 56 provided on the cover 3A. In this example, the measurement pressure was 200g, 500g, and 100100O.
Stocks. Next, when the return amount selection device 64 finishes measuring the outer dimensions of the object to be measured, it must immediately return the movable spring 18 to prepare for the measurement of the next object to be measured. At this time, in order to continuously measure objects of the same size, by arbitrarily selecting the return amount of the moving spring 18, it is possible to avoid wasteful reciprocating motion and shorten the measurement time. Therefore, in this embodiment, the return amount displayed by the return amount display lamp 52 is 100 ozm, 5 oW + ioo theory, or 150 min.
m, and the return time of the moving spindle 18 from the zero position is processed by the main control circuit 58 and the arithmetic circuit 59. Note that the tolerance alarm device 62 includes upper and lower limit setters 53 and 51.
The upper and lower limit tolerances for the standard dimensions of the object to be measured are set using C, and a complete judgment is made as to whether or not the outer dimensions of the object to be measured with respect to these set values fall within the upper and lower limit tolerances. When this occurs, processing is performed by the main control circuit 58 and the arithmetic circuit 59 so that the upper/lower limit alarm lamp 5+5 is displayed. Furthermore, the external output circuit 61 is connected to a digital recording device (not shown) to create measurement data. Furthermore, in this measuring device 1, since the feed screw 20 is inserted into the pipe-shaped movable spindle 18, there is room inside the measuring unit box 3, and the power transformer 49 can be accommodated, allowing direct connection to a commercial power source. (It is easy to handle.) Next, Fig. 9 shows a schematic configuration diagram of another embodiment of the present invention, [with] is the movable spindle side, and (6) is the fixed spindle side. In the figure, the tips of the movable spindle 18 and the fixed spindle 42 each have a contact end 66 having an arcuate cross section.
．． 67 is installed. At this time, the optical axis consisting of the light source 44 and the light-receiving element 45 is on the axis of the moving spindle 18 and the fixed spindle 42, or is slightly deviated from the axis, but is formed by the small holes 68 and 69 bored along this axis. Ru. Therefore, the thickness dimension of the object to be measured having parallel surfaces can be measured using the contact surfaces 66 and 67, and in this case, the presence or absence of the object to be measured can be reliably detected. [Effects of the Invention] As explained above, according to the present invention, a light source and a light receiving element are provided on the movable spindle and the fixed spindle, and the optical axis between the light source and the light receiving element is blocked. By providing a measurement object detection device for detecting the presence of an object, and further providing a measurement pressure selection device, a return amount selection device, and a tolerance alarm device, the configuration is simple, automated, and easy to handle. The effects are extremely large, such as speed, labor savings, and improved measurement performance.

[Brief explanation of drawings]

FIG. 1 shows a schematic configuration diagram of an embodiment of the present invention, (4)
is a front view thereof, ω) is a plan view thereof, (C) is a side view thereof, Fig. 2 is an enlarged view in the direction of the arrow A-A in Fig. 1, and Fig. 3 is an enlarged view in the direction of the arrow B-B in Fig. 1. Figure 4 shows a schematic diagram of the feed nut, Figure 4 shows its front view, Hitoshi's side view, Figure 5 shows a schematic diagram of the rotation stopper, and Figure 4 shows its front view. (Figure 6 is a side view, Figure 6 is a perspective view of the scale plate assembly, Figure 7 is a diagram of the cover display and operating equipment arrangement,
FIG. 8 is a block diagram of the control calculation processing section of the present side leg device, and FIG. 9 is a schematic configuration diagram of another embodiment of the present invention, (4)
03) is the moving spindle side, and 03) is the fixed spindle side. l: Automatic outer dimension measuring device, 3: Measuring part box, 4: Anobil part, 5: Mounting frame, 6: Guide plate, 7: Sent member,
8: Rotation preventing member, 18: Moving spindle, 20: Feed screw, 27: Coil spring, 28 Two dimension detection device, 2
9 Niskool plate, 38: Measurement pressure selection cylinder, 42: Fixed spindle, 43: Measured object detection device, 58: Main control circuit, 59: Arithmetic circuit, 60: External output circuit, 62: Tolerance alarm device, 64 : Return amount selection device, 66.67: Contact end with arcuate cross section. Pamela 4th Figure 5 (B) (A) Floor 9! Weak No. 6 1-g (

Claims (1)

[Scope of Claims] l) A measuring unit box, a feed screw provided in the measuring unit box and rotated in forward and reverse directions by a drive motor, and a feed screw provided in the measuring unit box and screwed with the feed screw; An elastic member is interposed between the to-be-fed member that moves in the front-back direction due to the rotation of the feed screw, and the to-be-fed member moves forward through the elastic member when the to-be-fed member moves forward. A stator provided on the axis of the movable spindle facing the tip of the movable spindle, and detecting the outer dimensions of the object to be measured, which is disposed inside the measuring unit box and is held between the movable spindle and the stator. In the measuring device, the measuring device includes a dimension detecting device that performs control and arithmetic processing on a detection signal of the dimension detecting device, and a control calculation processing unit that performs control calculation processing on a detection signal of the dimension detection device. ! ! 1
A light source and a light-receiving element are provided to form an original axis between the foot and the foot,
An automatic outer dimension measuring device characterized in that a device to be measured detects that the object to be measured is interposed between the movable spindle and the stator by blocking the optical axis. 2. The automatic outside dimension measuring device according to claim 1, wherein the feed screw is inserted into a moving spindle formed in a pipe shape. 3) Permissible scope of claim 1, wherein the movable spindle has a planar contact end with the stator, and an optical axis is provided on the axis of the movable spindle and the stator. External dimension measuring device. 4) In the description of claim 1, the movable spindle has a contact end having an arcuate cross section along with the stator;
An automatic outer dimension measuring device characterized in that an optical axis is provided along the axis of the movable spindle and the stator. 5) In the description of claim 1, the member to be sent is provided with a lotus plate formed parallel to the moving spindle, and a plurality of sets of light emitting elements and light receiving elements are arranged between both sides of the plate. A measuring pressure selection device is provided which is arranged at a required interval in the axial direction of the moving spindle, and by selecting the force of the light emitting element and the light receiving element, the elastic member is moved through the moving spindle to the measuring force to be measured. The automatic outer calculation processing section is characterized in that it selects the measurement pressure to be applied to the object.The automatic outer calculation processing section is characterized in that it selects the measurement pressure to be applied to the object. An automatic outside dimension measuring device whose percentage is to judge and process.