JPS6046644B2 - General purpose measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a general-purpose measuring device that allows a single measuring device to measure various measurement points on a workpiece machined with a machine tool.

In recent years, highly automated machine tools such as machining centers and group control machine tools, in which multiple machine tools are connected by a transfer device and collectively controlled by a computer, have been introduced to automatic workpiece feeding, automatic tool feeding, etc. Therefore, there is a tendency for continuous operation to be carried out unmanned. In order to carry out such unmanned operation smoothly, machining errors that occur due to thermal displacement of the machine tool and wear of the cutting edge must be constantly monitored, and the results fed back to the machine tool to ensure that the tolerance is always within a certain level. need to be kept inside. However, since machining centers and group control machine tools perform many types of machining on many types of workpieces, there are a wide variety of measurement points, and accordingly, many types of measuring instruments are required. A method is adopted in which multiple measurement stations are installed, or a worker measures a workpiece that has been processed and inputs the measurement results into a control device for correction.

Therefore, the former requires a large number of measuring stations, which not only requires a large space, but also has the drawback of requiring a lot of time to change the setup when changing the workpiece.
In the latter case, a worker is involved, making completely unmanned operation impossible and inefficient. The present invention provides a general-purpose measuring device that solves the problems of the conventional measuring devices described above, and its gist is that various types of measuring heads are removably installed at the tip. A plurality of quills are disposed on the frame, each of the quills is supported on the frame so as to be movable back and forth in the axial direction between a standby position and a measurement position, and a first power drive source provided on the frame. an engaging member that is driven by the quill to cause the quill to reciprocate in the axial direction; each of the quills is provided with an engaged member that can selectively engage with the engaging member; A second power drive source for relatively moving the engaged member and the engaging member to selectively engage the engaged member is provided in the frame, and the frame is caused to move relatively by the second power drive source. By providing a calling device that selectively calls the plurality of engaged members and the engaging members to a required engagement position, a measuring bed corresponding to a measuring point is selectively placed at a measuring position from among a plurality of measuring heads. The object of the present invention is to provide a general-purpose measuring device that can measure a wide variety of measurement points with a single measuring device.

An embodiment of the general-purpose measuring device of the present invention will be described in detail below.

The embodiment shown in FIGS. 1 to 7 includes the indexing operation of the indexing table on which the work is placed, the horizontal movement of the column,
The measurement head attached to the tip of the quill is brought to an arbitrary measurement point on the workpiece by a combination of vertical movement of the frame along the column and movement of the quill in a direction perpendicular to and horizontal to the movement direction of the column. It is configured as follows. 1 and 2 are an overall front view and an overall side view showing a first embodiment of a general-purpose measuring device of the present invention.

A circular indexing table 2 is placed on the table base 1 so that it can be rotated and indexed about a vertical rotation center axis, and on the indexing table 2 are two guides for guiding a rectangular pallet 3. Rails 4A, 4B and the guide rail 4A,
A clamp device 5 for clamping the pallet 3 is provided on the pallet 4B. A work W to be measured is fixed on the pallet 3. When the general-purpose measuring device of the present invention is incorporated into a group-controlled machine tool or a group of machine tools arranged in a line, an automatic pallet changer is used to move the workpieces W that have been processed onto the indexing table 2 for each pallet. By carrying the measured workpiece W into the table 2 and carrying it out of the machine from the table 2, the workpiece W can be continuously and automatically measured. Two horizontal guide surfaces 7A are provided on the upper surface of the column base 6 connected to the table base 1.
, 7B are formed, and a column 8 is slidably mounted on the guide surfaces 7A, 7B.

The column 8 is reciprocated by a feed screw rotated by a drive motor 9 attached to the column base 6 and a nut screwed into the feed screw. A box-shaped frame 11 is vertically slidably supported on two vertical guide surfaces 10A and 10B formed on the side surface of the column 8, and is driven by a drive motor 12 attached to the top surface of the column 8. It is vertically reciprocated by a feed screw 13 that rotates and a nut that is screwed into the feed screw 13.

Five quills 14A to 14E are arranged on the frame 11 at equal intervals on a concentric circle, and the quills 14A to 14E are
Each of the columns 8 and the frame 11 is supported by the frame 11 so as to be movable in a direction perpendicular to and horizontal to the movement direction of the frame 11. Furthermore, measurement heads 15A to 15E are detachably attached to the tips of each of the quills 14A to 14E. Next, the detailed structure inside the frame 11 will be explained with reference to FIGS. 3 to 5.

To simplify the explanation, FIGS. 3 and 4 show a cross section of one quill 14C among the five quills 14A to 14E, but the other quills have exactly the same structure. Through hole 16 bored in front wall 11A of frame 11
A bearing sleeve 17C is inserted into C, and a flange 18C of the bearing sleeve 17C is fixed to the front wall 11A with bolts 19C. A hollow quill 14C is fitted into a through hole 20C formed in the bearing sleeve 17C so as to be slidable in the axial direction. Further, a bearing sleeve 22C is inserted into a through hole 21C concentrically bored in the intermediate wall 11B of the frame 11, and the bearing sleeve 22C is inserted into the quill 1.
It slidably supports the middle part of 4C. Quill 14A
As shown in FIGS. 4 and 5, plate-shaped engaged members 23A to 23E are bolted to the rear ends of each of the engaged members 23A to 23E, and the inner ends of the engaged members 23A to 23E are provided with bolts. , bifurcated grooves 24A to 24E that selectively engage with engaging members to be described later.
is formed.

A hollow sleeve 2 is provided in the through hole 25C of the quill 14C.
6C is inserted movably in the axial direction, and the engaged member 2
The sleeve 26C is always urged forward by a spring 27C inserted between the front surface of the sleeve 3C and the stepped surface of the sleeve 26C.

A long groove 28C is cut in the axial direction at the rear of the sleeve 26C, and the tip of a pin 29C inserted toward the axial center of the engaged member 23C fits into the long groove 28C, and the sleeve 28C is connected to the quill 14C. 26C is stopped from rotating.
A cylindrical dog 30C is provided on the outer periphery of the rear end of the sleeve 26C.
are screwed together and secured with a nut 31C.
Therefore, the forward moving end of the sleeve 26C is connected to the dog 3.
The front end of 0C is regulated by coming into contact with the rear surface of the engaged member 23C. As shown in FIGS. 4 and 5, quills 14B and 14 are provided on the upper wall 11C of the frame 11.
A clearance groove 32 is provided directly above C and 14D parallel to the axis of the quill.
B, 32C, 32D are formed, and on the lower wall 11D,
Similarly, relief grooves 32A and 3 are provided directly below the quills 14A and 14E.
2E is formed.

Relief grooves 32A to 32 are provided in the upper wall 11C and the lower wall 11D.
A pair of guide plates 33A to 33E are bolted along both sides of the quills 14A to 14E, and a pair of rollers 34A to 34E attached to the outer ends of the engaged members 23A to 23E move the quills 14A to 14E in the axial direction. As the quills 14A to 14E move, they move along the guide plates 33A to 33E, and prevent the quills 14A to 14E from rotating relative to the frame 11. As shown in FIG. 3, a bearing sleeve 35C is inserted into the front side of the through hole 25C of the quill 14C, and a flange 36C of the bearing sleeve 35C is attached to the front end of the quill 14C with bolts.

A shank 37C of the measuring head 15C is inserted into the bearing sleeve 35C so as to be movable in the axial direction.
The rear end of the sleeve 26C is inserted into the front end of the sleeve 26C. A pin 38C is driven into the outer periphery of the front end of the sleeve 26C in the radial direction, and the pin 38C is fitted into a long groove 39C formed in the axial direction at the rear end of the shank 37C to prevent the shank 37C from rotating relative to the sleeve 26C. ing. shank 3
7C is inserted from the front with the bearing sleeve 35C removed, then the bearing sleeve 35C is inserted and bolted. A retaining ring 40 is attached to the outer circumference of the rear end of the shank 37C.
C is attached, and the retaining ring 40C is attached to the bearing sleeve 3.
It comes into contact with the rear end surface of 5C to prevent the shank 37C from coming off. Various measuring heads are attached to the tip of the shank 37C depending on the measurement site, and Fig. 3 shows a head for measuring the inner diameter, Fig. 6 shows a head for measuring the outer diameter, and Fig. 7 shows a head for measuring the depth. This shows an example of how it is installed.

To explain the measurement head 15C (for inner diameter measurement) in FIG. 3, a hollow cylindrical body 41 is bolted to the front end of the shank 37C, and an axial through hole 4 of the body 41
A shaft 43 is loosely inserted into 2. Between the front end flange 43A of the shaft 43 and the front end surface of the body 41, and the shaft 43
a collar 45 pressed against the rear end by a nut 44;
Ball bearings 46A and 46B are respectively inserted between the body 41 and the shaft 43 to allow the shaft 43 to move lightly in the radial direction relative to the axial through hole 42 of the body 41. A bolt 47 protruding into the axial through hole 42 is screwed into the body 41 , and the tip of the bolt 47 is fitted into a hole 48 on the outer periphery of the shaft 43 to prevent the shaft 43 from rotating relative to the body 41 .
Three radial holes 49 are bored in the body 41 at 120 degree intervals and communicate with the axial through hole 42, and the springs 50 inserted into the radial holes 49 are inserted in three directions by screws 51. The shaft 43 is held in the center of the axial through-hole 42 by evenly pressing the shaft 43 against the shaft 43 . An inner diameter measuring head 5 is attached to the front end flange 43A of the shaft 43.
2 is bolted.

The inner diameter measuring head 52 is composed of a small diameter measuring section 52A on the tip side and a large diameter measuring section 52B on the rear side, and can measure two types of diameters with one head. Of course, two or more types of measurement units can be provided in one head. The small diameter measuring section 52A and the large diameter measuring section 52B each have an air outlet 53.
A, 53B are bored, and communication holes 54A, 54B bored in the axial direction of the shaft 43 communicate with air jet ports 53A, 53B, respectively. Hoses 55A and 55B for the air supply 7 are connected to the communication holes 54A and 54B, respectively, and the hoses 55A and 55B are connected to the shank 37C and the sleeve 26C.
It projects outward from the rear end of the sleeve 26C through the axial through hole, and is connected to an air supply source as described below.
As mentioned above, since the inner diameter measuring head 52 is able to float relative to the body 41, when the inner diameter measuring head 52 is inserted into the measuring hole during measurement, even if the measuring hole is slightly deviated from the predetermined position, the inner diameter By floating the measurement head 52 along the measurement hole, it can be inserted without impact. A cylindrical cover 56 that covers the body 41 is attached to the outer periphery of the shaft 43 to prevent chips and dust from entering the ball bearing 46A. The outer diameter measuring head shown in FIG. 6 has almost the same structure as the inner diameter measuring head 15C described above, and differs only in the measuring head at the tip. That is, the tip of the shaft 43 is a bifurcated outer diameter measuring head 57 that sandwiches the workpiece W, and the air jet ports 58A, 58B that open inside the tips of the bifurcated portions 57A, 57B connect the communication holes 59A, 59B. It communicates with the communication hole 60 of the shaft 43 via the shaft 43 . The communication hole 60 is provided with the inner diameter measuring head 15.
Similarly to C, a hose 61 is connected. The measuring method of the outer diameter measuring head is the same as that of the inner diameter measuring head 15C. The depth measuring head shown in FIG.
3, a flange 62 at the tip of the shaft 43, and a measuring head 63 protruding forward from the flange 62. The diameter and length of the measuring head 63 are changed depending on the diameter and depth of the hole to be measured. A spring 64 is inserted between the rear end surface of the flange 62 and the front end surface of the body 41, and constantly urges the shaft 43 forward. A collar 65 that contacts the rear end surface of the body 41 is attached to the rear end of the shaft 43 with a nut 66 to restrict the forward end of the shaft 43. Measuring head 6
An air outlet 67 is formed on the front end surface of the shaft 43 and communicates with a communication hole 68 bored in the axial center of the shaft 43 . Communication hole 6
8 is connected to a hose 69, similar to the inner diameter measuring head 15C. When measuring the depth, since there are variations in the position of the measurement reference surface Wa of the work W, the quill 14C is moved forward so that after the front end surface of the flange 62 contacts the measurement reference surface Wa, the quill 14C is pushed in a little further. Control quantity. Therefore, the flange 62 moves back slightly while compressing the spring 64, so that the flange 62 is always in front of the flange 62. The end surface comes into close contact with the measurement reference surface Wa, allowing accurate depth measurement. In the embodiments of the present invention, all measurement heads are of the air micro type, but an electric type measurement head may also be used. Next, an explanation will be given of an engaging member that selectively takes out and takes out the quills 14A to 14E, and a means for reciprocating the engaging member. As shown in FIGS. 3 and 4, below the frame 11, a screw 70 is attached to the front wall 11A, parallel to the axes of the quills 14A to 14E. It is rotatably supported on the rear wall 11E by bearings 71A, 71B, 71C, and 71D. A gear 72 is keyed to the rear end of the screw 70. A motor (first power drive source) is located below the gear box 73 attached to the rear wall 11E.
A gear 75 , which is keyed to the output shaft 74</b>A of the motor 74 , meshes with the gear 72 and transmits the rotation of the motor 74 to the screw 70 . ) As shown in FIGS. 3, 4, and 5, a nut 76 is screwed onto the screw 70, and as the screw 70 rotates, it reciprocates in parallel with the axes of the quills 14A to 14E.

A thick plate-shaped reciprocating member 77 is bolted to the nut 76. Approximately midway between the quill 14C and the screw 70, and at the center of the concentric circle in which the quills 14A to 14E are arranged, a spline shaft 78 is parallel to the axis of the quill 14C, and a bearing 79A is mounted on the front wall 11A and the rear wall 11E.
It is rotatably supported by shafts 79B and 79C.
A spline cylinder 80 is fitted into the spline shaft 78 so as to be engaged with the spline shaft 78 and to be slidable along the spline shaft 78 . Spline tube 80
The reciprocating member 77 is provided with bearings 81A, 81B,
81C, and is prevented from moving in the axial direction with respect to the reciprocating member 77 by a nut 82 and a collar 83. Splat. On the rear end surface of the in-tube 80,
Engaged members 23A to 23E of the quills 14A to 14E
A plate-shaped engagement member 84 whose one end can be selectively engaged with the bifurcated grooves 24A to 24E is bolted.

Further, a cup-shaped holding member 85 is keyed to the right side of the spline shaft 78, and a flange 86 on the front outer periphery of the holding member 85 has the same thickness as the engaging member 84,
Bifurcated grooves 24A, 24B, 24D, 24E of the engaged members of the quills 14A, 14B, 14D, and 14E in the standby position (excluding the quill 14C engaged by the engagement member 84)
The quills 14A, 14B, 14D, and 14E are held in the standby position. An engaging member 84 is provided on the outer periphery of the front end of the holding member 85 in order to allow the engaging member 84 to move backward until it enters the holding member 85 and move to a standby position where the position in the axial direction coincides with the flange 86. A recess 85A is formed which is slightly wider than the width of the recess 85A. Next, the spline shaft 78 is rotated to move the engaging member 84 to the engaged member 23.
A calling device that calls to a rotational position that selectively engages A to 23E will be described.

As shown in FIG. 4, a gear 87 is keyed to the rear end of the spline shaft 78, and a motor (second power drive source) 88 is attached to the gear box 73 as shown by the two-dot chain line.
The gear 89 keyed to the output shaft 88A of the gear 87
The rotation of the motor 88 is transmitted to the spline shaft 78. The gear box 73 also includes a bearing casing 9.
0 is bolted to the bearing casing 90, and the bearing 91A is attached to the bearing casing 90.
, 91B, a gear 93 having the same number of teeth as the gear 87 is keyed to the front side of the rotating shaft 92 rotatably supported by the gear 87, and meshes with the gear 87 to rotate synchronously. A cylindrical drum 94 is keyed to the rear side of the rotating shaft 92, and each quill is positioned on the outer periphery of the drum 94 at the same angular intervals as the arrangement of the quills 14A to 14E in a binary w-adic system. A dog 95 is provided to display the following. When the dog 95 depresses the multi-limit switch 96 attached to the gear box 73, an electric signal is sent to indicate that the engaging member 84 has rotated to the angular position where it engages with the required engaged members 23A to 23E of the quill. is detected and the motor 88 is stopped. As shown in FIGS. 4 and 5, a dog 97 is attached to the lower surface of the reciprocating member 71, and when the engaging member 84 is retreated to the standby position where it matches the flange 86, a limit switch 98 is depressed. , the rotation of the motor 74 is stopped, and the reciprocating member 77 is positioned. Further, the dog 97 is connected to the limit switch 9 at the forward end of the reciprocating member 77, as shown by the two-dot chain line in FIG.
9 to stop the rotation of the motor 74 and prevent the reciprocating member 77 from overrunning. Next, a safety device for preventing accidents such as loss of precision or damage of the measuring head when a large load is applied to the measuring head during measurement will be explained.

As shown in FIGS. 4 and 5, engaged members 23B, 2
3C, the rear surface of the upper wall 11C side of 23D, and the engaged member 2
A stay 1 is provided on the rear surface of the lower wall 11D side of 3A and 23E.
00A to 100E are installed, and stays 100A to 1
Limit switches 101A to 101E are fixed to each of 00E. Quill 14C shown in Figures 3 and 4
To explain the operation of the safety device when measuring the hole diameter using the measuring head 15C at the tip, if the axis of the machined hole does not match the axis of the quill 14C, or if the machined hole diameter is different from that of the measuring head. When the quill 14C is sent out toward the measurement hole by the rotation of the motor 74 when the finished product is smaller than the outer diameter, the front end surface of the measurement head hits the front surface Wb of the workpiece W, and if the quill 14C is continued to advance after that, , the measuring head 15C and the sleeve 26C move backward relative to the quill 14C while compressing the spring 27C, and the dog 30C depresses the limit switch 101C. If the motor 74 is stopped by this electric signal,
It is possible to prevent an excessive load from acting on the measurement head 15C. Next, a guide device that smoothly guides the hose that supplies air to the measurement head while the quills 14A to 14E are moving will be described.

As shown in FIGS. 4 and 5, engaged members 23B, 2
3C, the rear surface of the upper wall 110 side of 23D, and the engaged member 2
L-shaped stays 102A to 102E are bolted to the rear surfaces of 3A and 23E on the lower wall 11D side. Also,
Box-shaped housings 103 and 104 are attached to the upper wall 11C and lower wall 11D of the frame 11 with bolts over almost the entire length of the frame 11, and between the housing 103 and the stays 102B, 102C, 102D, and the housing Between 104 and stays 102A and 102E,
Steel belts 105A-105E are bent into a U-shape and bolted at both ends. Air supply hoses 55 are attached to the steel belts 105A to 105E.
A and 55B, and limit switches 101A to 101E
Electric wires 55C for use are held together in a bundle by a band 106. One end of the air supply hoses 55A and 55B is guided by L-shaped guide plates 107A to 107E bolted to the stays 102A to 102E, and is guided to the sleeve 26A.
~26E. In addition, the other ends of air supply hoofs 55A and 55B are connected to an air micrometer (not shown) having an air switch, and depending on the magnitude of back pressure during measurement, the measured value is within the tolerance. It extracts whether or not it is in the form of an electrical signal. The general-purpose measuring device of the present invention is constructed as described above and operates as follows.

The general-purpose measuring device of the present invention is numerically controlled, and selects the required measuring head according to a preprogrammed operation sequence depending on the work to be measured, and numerically controls the motors 9, 12, and 74 to set the required measurement position. Position the measuring head and take measurements. In other words, the workpiece W that has been processed is placed on the pallet 3.
Either the workpiece W is placed on the indexing table 2 using an automatic pallet changing device and clamped thereon, or the workpiece W is lifted by a crane or the like and placed on the pallet 3.
When it is attached to the top, a measurement operation corresponding to the workpiece W is started.

First, the dog 97 of the reciprocating member 77 steps on the limit switch 98 to confirm that the engaging member 84 is in the standby position, and then the motor 88 rotates to rotate the spline shaft 78. If the engaging member 84 is not in the standby position, the motor 74 is rotated to move the reciprocating member 77 backward until the dog 97 depresses the limit switch 98. As described above, when the spline shaft 78 rotates, the engaging member 84 and the holding member 85 rotate, and the calling drum 94 also rotates in synchronization with the engaging member 84 and the holding member 85.

For example, when using the measuring head 15A for the quill 14A, when the dog corresponding to the quill 14A on the drum 94 is read by the multi-limit switch 96, the drive of the motor 88 is stopped in response to this reading sorting signal. For example, the engaging member 84 is the engaged member 23A of the quill 14A.
It engages with the bifurcated groove 24A. The flange 86 of the holding member 85 engages with the other bifurcated grooves 24B to 24E to hold the quills 14B to 14E that are not used for measurement in the standby position. Next, the motors 9 and 12 are driven to position the column 8 in the horizontal direction and the frame 11 in the vertical direction according to the measurement site, and then the motor 74 is driven to move the reciprocating member 77. The quill 14A engaged with the engaging member 84 is moved forward to a position corresponding to the measurement part of the workpiece W, and the measurement is performed.

During measurement, as described above, when a force greater than the spring force of the spring 27A acts on the measuring head 15A and the measuring head is pushed in, the dog 30A moves to the limit switch 10.
1A to stop driving the motor 74 and protect the measurement head 15A from overload. When the measurement by the measuring head 15A is completed, the motor 74 is driven in the reverse direction to move the reciprocating member 77 back to the standby position where the dog 97 depresses the limit switch 98, and the next measuring head is called up again as described above to start the measurement. continue. The measurement values measured in this way are fed back to the control device of the machine tool, and the cutting depth of the machine tool can be corrected to keep it within the tolerance range, or it can also be used to easily adjust the entrance and exit of the cutter. . In the first embodiment described above, by rotating the engaging member at the center position of the circle in which the quill is arranged, the engaged member of the quill is selectively engaged with the engaging member, and the required measurement is performed. This is a method in which a quill with a head is brought to a measurement position, but as another embodiment, there is a method shown in FIG.

That is, in the second embodiment shown in FIG. 8, the entire drum on which the quill is arranged is rotated to selectively engage the engaging member provided at the center of the drum and the engaged member of the quill. In other words, in the frame 11,
A hollow drum 108 is rotatably supported by a drive source (not shown), and eight quills 109A to 109H are arranged on the same circumference at equal angular intervals on the drum 108. 109H is supported on the drum 108 so as to be slidable in a direction perpendicular to the plane of the paper.

Various measurement heads are attached to the tips of each of the quills 109A to 109H, as in the first embodiment.
Each quill 109A to 109H has an engaged member 1 extending toward the center of the drum 108 as in the first embodiment.
10A to 110H are attached. Also drum 1
08 is formed with a groove corresponding to the moving distance of the quill to allow the engaged members 110A to 110H to move in the axial direction together with the quill. Engaged members 110A to 110
Similar to the first embodiment, H has a bifurcated tip, and at the retreating end of the quill, an engaged member of the quill other than that used for measurement (in FIG. 8, engaged member 110
The engaged members (excluding G) engage with the disk-shaped holding member 111 to hold the quill that is not used for measurement in a standby position at the rearward end. Further, a reciprocating member 113 is screwed into a screw 112 which is disposed at the center of the drum 108 in a direction perpendicular to the plane of the paper and is rotationally driven by a drive source. Move back and forth. The tip of the reciprocating member 113 extending in the 3 o'clock direction has an engagement member that selectively engages with the bifurcated grooves of the engaged members 110A to 110H at the 3 o'clock position when the drum 108 is rotationally indexed. A member 114 is formed. Therefore, by rotationally driving the drum 108 and indexing a quill to be used for measurement at the 3 o'clock position using a calling device (not shown), the engaged member of the desired quill is engaged with the engaging member 114. Therefore, by rotationally driving the screw 112, the reciprocating member 113 is advanced by a required amount, and measurement using the required measuring head can be performed. When performing measurement with another measuring head, after retracting the quill of the measuring head just used to the standby position at the retreating end, the drum 108 is driven to rotate, and the desired quill is placed at the 3 o'clock position again. Just put it out. Figure 9-
A to FIG. 9-C show a third embodiment of the present invention, and show an embodiment in which a plurality of quills are arranged in a straight line. That is, the frame 11 has two rows of quills 115A to 115D on the left and right, four on the left and five on the right.
5E to 115I are supported so as to be slidable in a direction perpendicular to the plane of the paper. The quills 115A to 1151 are arranged vertically at equal pitch intervals, and the left and right quills are arranged offset from each other by one or two pitches. Quill 115A~1
A measurement head is attached to the tip of 151 as in the first embodiment. Also quill 115A~115
1 is prevented from rotating relative to the frame 11 by a key. Racks 116A to 1161 are formed on the quills 115A to 1151 by approximately the distance traveled by the quills,
It can selectively engage with a pinion 117, which will be described later. In the frame 11, bearings 118A to 118A are provided at the intermediate portions of the left and right quills, and at the upper wall 11C and lower wall 11D of the frame 11.
A spline shaft 119 is rotatably supported by the spline shaft 118C, and a pinion 117 is engaged with the spline shaft 119 so as to be slidable up and down along the spline shaft 119.

A gear 120 is keyed to the upper end of the spline shaft 119, and a gear box 12 is mounted on the upper wall 11C.
A motor 122 is attached to the gear 12, and a gear 123 keyed to the output shaft 122A of the motor 122 is attached to the gear 12.
0, and the rotation of the motor 122 is controlled by the spline shaft 11.
9 to rotate the pinion 117. As shown in FIG. 9-B, the frame 1 is parallel to the spline axis 119.
Bearings 124A to 124 are mounted on the upper wall 11C and lower wall 11D of 1.
A screw 125 is rotatably supported by C.

A nut 126 is screwed onto the screw 125, and a thick plate-shaped reciprocating member 127 is bolted to the nut 126.
A bearing 128A is attached to the shaft portion 117A of the pinion 117.
, 128B, and fixed in the axial direction by a nut 129. A gear 130 is keyed to the upper end of the screw 125, and the gear 130 meshes with a gear 132 keyed to the output shaft 131A of the motor 131 attached to the gear box 121.
The rotation of the reciprocating member 127 is transmitted to the screw 125.
The pinion 117 is moved up and down via.

In addition, as shown by the two-dot chain line in FIG. 9-B, the gear box 121 includes a calling device (pulse generator) 13.
3 is attached to the output shaft 133 of the calling device 133.
The gear 134 keyed at A meshes with the gear 130, transmits the rotation of the screw 125 to the calling device 133, and counts the pulses, thereby turning the pinion 117.
It is possible to select a position where the racks engage with each of the racks 116A to 1161. The frame 11 has a notch 135A with a semicircular cross section and a diameter slightly larger than the diameter of the pinion 117.
135B are formed on the left and right sides, allowing the pinion 117 to move up and down and selectively engage with the racks 116A to 1161. To explain the operation of the third embodiment of the present invention, the motor 131 is driven, the pinion 117 is moved up and down, and the calling device 133 engages the desired quill rack.

When the engagement is completed, the motor 122 is driven to rotate the pinion 117, and the measurement head of the selected quill is sent to a desired measurement position to perform measurement. The amount of movement of the quill in and out is controlled by counting the pulses of a pulse generator (not shown) that meshes with the gear 120. When the measurement is completed and the next measurement head is to be selected, the motor 122 is driven to rotate the pinion 117,
After retracting the quill to the predetermined standby position at the retracting end, the motor 131 is driven as described above, and the pinion 1
17 can be moved up and down to engage the rack of the desired quill. By repeating the above-described operations, it becomes possible to select a desired measurement head from among the plurality of measurement heads and bring it to the measurement position. In the embodiment of the present invention, a drive source for protruding a quill used for measurement from among a plurality of quills and a drive source for moving the protruded quill in the axial direction to a required measurement position are shared. As another example, the desired quill is projected to a fixed protruding position by a driving source such as a cylinder, and the axial positioning to the measurement position is performed by moving the indexing table 2 or the entire frame 11 parallel to the axis of the quill. It is also possible to position by As described above, the present invention is not limited to the configurations shown in the embodiments, and modifications are expected without departing from the technical idea of the present invention as described in the claims.

[Brief explanation of the drawing]

FIG. 1 is an overall front view of a first embodiment of the general-purpose measuring device of the present invention; FIG. 2 is an overall side view; FIG. 3 is an enlarged vertical sectional view showing the front part of the frame; FIG. FIG. 5 is an enlarged vertical cross-sectional view showing the rear part of the frame, FIG. 5 is a view taken along the line A-A in FIG. 8 is a partial front view showing a second embodiment of the general-purpose measuring device of the present invention, and FIGS. 9-A to 9-C show a third embodiment, FIG. 9-A is a longitudinal sectional view, and is a BB sectional view of FIG. 9-B. Figure 9-B is a sectional view of Figure 9-A (7) C-C, Figure 9-
C is a sectional view taken along line A-D in FIG. 9-A (7). In the figure, 1...table base, 2...index table, 6...◆●column base, 8...◆
...Column, 11...Frame, 14A-14
E...Quill, 15A-15E...Measuring head, 23A-23E...Engaged member, 2
4A to 24E...Bifurcated groove, 52...Inner diameter measuring head, 57...Outer diameter measuring head, 70
...Screw, 74 ...Motor, 76
... Nut, 77 ... Reciprocating member, 78
... Spline shaft, 80 ... Spline tube, 8
4... Engaging member, 85... Holding member, 8
6...Flange, 88...Motor, 9
4...Drum, 95...Dog, 96...
...Multi limit switch.

Claims (1)

[Claims] 1 A column that moves on a base to the left and right with respect to the workpiece, a frame that moves in the vertical direction on the column, and a frame that is provided on the frame and is capable of reciprocating in the axial direction between the coordinate position of the measurement point of the workpiece. a plurality of quills, a measuring head removably provided at the tip of the quill, a spline shaft rotatably supported on the frame parallel to the axial direction of the quill, and reciprocating the quill in the axial direction. a first power drive source provided on the frame to
an engaging member provided in the vicinity of the plurality of quills to cause the quills to reciprocate in the axial direction on the spline shaft by the first power drive source; an engaged member that is selectively engageable with the engaging member; and a second member that is provided on the frame and rotates the spline shaft so as to selectively engage the plurality of engaged members and the engaging member. and a power drive source, which moves the selected quill perpendicularly to the plane by rotating the spline shaft at a point on the plane coordinate determined by the movement of the column and frame, and at the same time moves the quill specified by the movement of the column and frame. A general-purpose measuring device characterized by positioning at the coordinate position of a measurement point on a workpiece.