JPH07110202A - Three-dimensional shape measuring instrument - Google Patents

Abstract

PURPOSE:To enable a three-dimensional shape measuring instrument to measure both surfaces of an object to be measured which is carried by a mounting device on rails and is larger than the original measurable extent of the instrument in the carrying direction while the object is mounted on the mounting device without requiring any replacing work. CONSTITUTION:A mounting device 9 onto which such an object to be measured as the automobile is carried by rails 1 laid on a floor is provided in parallel with the main body of a three-dimensional shape measuring instrument which can measure three-dimensional shapes. The device 9 is equipped with a rotary surface plate 45 which supports rails 51 on it and a sliding surface plate 35 which is slid in the direction opposite to the carrying direction of the object by the distance which can expand the original measurable extent of the measuring instrument. Mobile rails 21 equipped with a driving mechanism which moves the rails 21 to retreated positions from normal positions so that the rails 21 can cope with the rotation and sliding of the rails 51 by means of the surface plates 45 and 35 are provided between the rails 1 and 51.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional shape measuring apparatus main body for measuring a three-dimensional shape, and a placing apparatus on which a measuring object is carried alongside a carrier laid on the floor. Accordingly, the present invention relates to a three-dimensional shape measuring device that measures the three-dimensional shape of a measurement object such as an automobile body that has been brought in.

[0002]

2. Description of the Related Art The three-dimensional shape of an automobile body can be measured by placing it on a surface plate by a three-dimensional shape measuring device having a measuring range of a corresponding size, and when measuring the opposite side, It is placed again so that the position on the board is reversed. Further, according to Japanese Utility Model Laid-Open No. 62-75411, the measurement target is mounted on the rotary table mounted on the slidable X-axis drive mechanism only once, and is rotated while being moved in the X-axis direction. A three-dimensional laser measuring device capable of measuring all its dimensions is well known.

[0003]

According to this latter device, the re-mounting work on the rotary table is unnecessary, but the measuring object has to be moved along the main body of the three-dimensional shape measuring device at the time of measurement. Moreover, the object to be measured is not placed at a fixed position as it is from a carrier such as a rail laid on the floor. Further, in the case of a large measuring object such as an automobile body, there is a problem that measuring while rotating causes interference with the main body of the three-dimensional shape measuring apparatus.

In view of the above points, the present invention is more suitable than the measuring range of the main body of the three-dimensional shape measuring apparatus in a state where it is placed on the placing apparatus along the floor by a carrier such as a rail or a conveyor. It is an object of the present invention to provide a three-dimensional shape measuring apparatus that can measure both sides of a measurement object that is large in the transport direction without requiring a re-mounting operation.

[0005]

In order to achieve this object, the present invention carries a measurement object into a main body of a three-dimensional shape measuring device for measuring a three-dimensional shape along a carrier laid on the floor. In the three-dimensional shape measuring apparatus, which is brought in and measures the three-dimensional shape of the measurement object that is faced by the placing apparatuses being arranged side by side, the placing apparatus is a conveyance body laid on the floor. A rotating platen for supporting the carrier separated from the upper part, a rotating mechanism for rotating the rotating platen, and at least a distance for expanding the original measuring range of the three-dimensional shape measuring apparatus main body in the direction opposite to the conveying direction. A drive for moving from the normal position to the escape position so as to allow rotation and sliding of the carrier of the mounting device by the rotating platen between the floor and the carrier of the mounting device. Equipped with a mechanism Characterized in that the movable carrier is interposed a.

According to a second aspect of the present invention, the mounting device is at least in the normal position when the carrier is rotated by the rotary platen so that the carrier of the mounting device can be rotated without letting the movable carrier escape. To avoid interference with the movable carrier,
A lifting mechanism for lifting the carrier is provided.

[0007]

When the object to be measured is carried into the carrier of the mounting device from the carrier laid on the floor via the movable carrier,
The main body of the three-dimensional shape measuring device measures the three-dimensional shape on one side thereof. When the movable platen is moved from the normal position to the escape position and the rotating platen is rotated by the rotating mechanism,
The carrier of the placement device rotates without interfering with the movable carrier, and measurement on the opposite side is possible. Further, when the carrier of the mounting device is slid to the normal position of the movable carrier by the slide mechanism, it is possible to measure a wider range in the carrying direction than the original measuring range of the main body of the three-dimensional shape measuring apparatus.

When the mounting device is provided with an elevating mechanism for elevating and lowering the carrier, by raising or lowering the carrier while the movable carrier is at the normal position, interference with the movable carrier is prevented. It avoids and rotation is performed.

[0009]

1 and 2 show a three-dimensional shape measuring apparatus suitable for three-dimensional shape measurement of an automobile body or the like according to an embodiment of the present invention.

In FIG. 2, reference numeral 10 denotes a three-dimensional shape measuring apparatus main body (hereinafter referred to as a measuring apparatus main body), which is placed on a trolley 5 traveling on a rail 1 of a carrier 1a laid on the floor to face each other. For example, the measurement target object of the automobile body 3 that has been conveyed to the measurement location is measured. This measuring device main body is arranged in a conveyance direction A between gates constituted by side frames 11 and 12 on both sides and a roof frame 13 which are erected on a base portion.
A slider 15 movable along (X-axis direction),
An arm 16 slidable in the Y-axis direction orthogonal to the transport direction A and in the upper and lower Z-axis directions is supported by this slider, and a contactor 16a is provided at the tip thereof. At the measurement location, a placing device 9 (FIG. 2) provided with a carrier 50 on which rails 51 are laid so that the carriage 5 can be loaded is arranged, and between the carrier and the carrier 1a, the carrier direction A is set. There is a movable carrier 20 slidable in the orthogonal direction B with respect to and having rails 21 installed.

As shown in FIG. 1, the mounting device 9 includes a surface plate 3
Guided by rail 32 installed at 0, stopper 33
Slide surface plate 3 driven by hydraulic cylinder 34
5 and a slide shaft 37 which is guided up and down at the four corners of the slide platen, and the central portion of which is the cylinder 3
8, an elevating platen 40 that is driven in the vertical direction, and a rotating platen 45 that is rotatably supported at its four corners by ball support legs 42 and has its central portion rotationally driven by a motor 41. Is equipped with.

The rotating platen is guided by guide rods 49 provided upright at its four corners, and cylinders 53 are provided on both sides of the central portion.
The carrier 50 that is driven up and down is placed by the rails, and a rail 51 laid on the surface of the carrier 50 can move up and down between a measurement position indicated by a solid line and a standby position indicated by a two-dot chain line. A pin 52a protruding from the cylinder rod 52 is engaged with an elongated hole formed at one end of the doglegged lever 54. The intermediate position is the pin 5 supported by the rotary platen 45.
A roller 52c hinged by 2b and projecting from the other end is engaged with a long groove 55 provided on the back surface of the carrier 50. As a result, when the cylinder rod 52 is projected, the roller 52c is rotated upward in the long groove 55, and the carrier 50 is raised.

At the upper end of the guide rod 49, mounting surfaces 49b at the four corners of the carriage 5 are formed and guide pins 49a are formed.
Is projected. Therefore, when the carriage 5 descends as the carrier 50 descends, its guide hole 5a
The carriage 5 is positioned by engaging the guide pin 49a in (FIG. 2) and supporting the peripheral surface of the guide pin 49a from below by the mounting surface 49b.

The movable carrier 20 can travel along rails 24 laid on the base portion 23 by wheels 25 driven by a motor 26, and slides by a stroke slightly wider than the lateral width of the carrier 50. Then move to the escape position. The lifting and lowering surface plate 40 is used when the carrier 50 rotates.
So as not to interfere with the movable carrier 20 in the normal position, and leave a space also in the contactor 16a in the original position of the measuring device body 10 (downward position in the Z-axis direction in FIG. 2). The rotary platen 45 is raised.

The slide mechanism 32 having the above structure
35, rotation mechanisms 41, 42, 45 and lifting mechanisms 37, 3
8, 40, 49, 52 to 54 are provided with control circuits for driving and controlling the associated cylinders or motors so as to move them by a predetermined stroke or rotation angle. In addition, this control circuit, each drive operation independently by external operation,
Alternatively, it is configured such that a partial or whole measurement process is sequence-controlled.

The operation of the thus-configured three-dimensional shape measuring apparatus will be described with reference to FIG.

In the standby state of the mounting device 9, the rail 51 of the carrier 50 occupies the raised position shown by the chain double-dashed line in FIG. 1, and therefore is continuous with the rail 21 of the movable carrier 20 and the rail 1 of the floor. There is. The automobile body 3 is placed on the carriage 5 and is carried into the carrier 50 from the carrier 1a on the floor via the movable carrier 20. The car body 3 comes into contact with a stopper 58 provided upright at the tip thereof to stop. (FIG. 3A).

At the time of measurement, when the carrier 50 is lowered by the cylinder 53, the guide hole 5a of the carriage 5 is engaged with the guide pin 49a and is mounted on the mounting surface 49b around the guide pin 49a to be positioned at the reference position. (Fig. B). The measuring device body 10 measures the three-dimensional shape of one side surface of the automobile body 3 by moving the contactor 16a in the three-dimensional direction.

Next, the rotary platen 45 is raised to a position slightly lower than the roof frame 13 of the measuring device body 10 so that the carrier 50 does not interfere with the movable carrier 20 (FIG. 7C). It is rotated and lowered to the measurement position (D in the figure). In this state, the other side surface of the automobile body 3 is measured. When the measurement is completed, the carrier 50 is raised to the standby position and the carriage 5 is carried out along the rails 51, 21, 1.

FIG. 4 shows an automobile body 3 having a longer vehicle length.
An example of measurement when a is placed on a trolley 5b having a correspondingly long length and carried in is shown. 3A and 3B, the front portion of the vehicle body 3a is out of the measurement range when the carriage 5b is loaded and the carriage 5b is restricted by the stopper 58. Therefore, leave this portion and measure one side surface. Next, the rotary platen 45 is raised and the movable carrier 20 is slid in the orthogonal direction (FIG. 4A). Then, the slide platen 35 is moved backward in the direction opposite to the transport direction A so that it does not interfere with the base portion 23 of the movable transporter 20 and is retracted only by the stroke regulated by the stopper 33 that is slightly shorter than half the width ( 4B), and further descending to measure the remaining front part.

When the measurement of one side surface is completed, the rotary platen 45 is raised and rotated (FIG. 4C). At this time, the contact 1 of the carriage 5b is rotated by the rotation of the rotation path D at the retracted position.
Interference with 6a is avoided. Incidentally, if it does not move backward, the rotation on the rotation path C interferes with the probe 16a. Then, it is lowered to the measurement position and the car body 3
The side surface opposite to a is measured, leaving the front part. further,
The rotary platen 45 is raised to engage with and disengage from the guide pin 49a, and is slid in the carrying direction A to return the movable carrier 20 to the original position and lower it to measure the remaining front portion. When the measurement is completed, it is carried out in the inverted state (FIG. 4D).

In the above-mentioned embodiment, if there is no problem in terms of interference, it is possible to eliminate the elevating device and rotate the movable carrier 20 in a released state. In some cases, if it can be lowered to avoid interference with the movable carrier 20, the lifting device is lowered during rotation. The raising and lowering by the cylinder 53 can be abolished by raising and lowering the raising and lowering platen 40 in two steps, and also when it is measured while being conveyed along the rail 51.
The present invention is also applied to the case where the carrier is configured as a conveyor instead of a rail, and the movable carrier and the carrier of the mounting device are also provided with a continuous conveyor. The present invention can be applied to the case of a non-contact laser type main body of the three-dimensional shape measuring apparatus.

[0023]

As described above, according to the first aspect of the present invention, both sides of the object to be measured can be quickly measured because the placing device can be inverted while the movable carrier is allowed to escape, and at the escaped position. Since the mounting device can be slid, measurement outside the measurement range along the transport direction can be efficiently performed. Therefore, it is not necessary to increase the measurement range of the three-dimensional shape measuring apparatus in accordance with the measurement object, which is advantageous in terms of cost.

According to the second aspect of the present invention, the movable platen can be rotated without moving the movable carrier by raising or lowering the rotary platen. In addition, depending on the shape of the three-dimensional shape measuring apparatus main body or the mounting apparatus, even when interference occurs during rotation,
It is also possible to avoid the interference by moving the rotating surface in the vertical direction.

[Brief description of drawings]

FIG. 1 is a side view of a mounting device of a three-dimensional shape measuring apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of the same three-dimensional shape measuring apparatus.

FIG. 3 is a schematic side view explaining the operation of the same three-dimensional shape measuring apparatus.

FIG. 4 is a diagram illustrating an operation of the same three-dimensional shape measuring apparatus when measuring a long measurement object.

[Explanation of symbols]

 1, 21, 51 Rail 1a, 50 Conveyor 3, 3a Car body 5, 5b Cargo 9 Mounting device 10 Three-dimensional shape measuring device main body 20 Movable conveyer 35 Sliding surface plate 40 Lifting surface plate 45 Rotating surface plate

Claims (2)

[Claims] 1. A three-dimensional shape measuring apparatus main body for measuring a three-dimensional shape is placed side by side with a placing apparatus for carrying an object to be measured along a carrier laid on the floor so as to be brought in and faced. In the three-dimensional shape measuring device adapted to measure the three-dimensional shape of a measurement target, the placing device has a rotating surface plate that supports a carrier separated from a carrier laid on the floor upward, And a slide mechanism for sliding the rotary platen in a direction opposite to the conveying direction by a distance that expands at least the original measurement range of the main body of the three-dimensional shape measuring apparatus. A movable carrier provided with a drive mechanism for moving the carrier from the normal position to the escape position so as to allow the rotation and the slide of the carrier of the placing device by the rotating platen between the carriers of the device. To Three-dimensional shape measuring apparatus, characterized in that allowed Zaisa. 2. The mounting device includes an elevating mechanism for raising and lowering the carrier so as to avoid interference with at least a movable carrier at a normal position when the carrier is rotated by a rotary platen. The three-dimensional shape measuring device according to claim 1.