attachment

Abstract

The objective is to create an attachment for fixing a marker when measuring the three-dimensional shape of an object using an optical scanner, which does not rely on magnets, improves the ability to fix the marker to the three-dimensional structure of the object being measured, prevents displacement of the marker during measurement, and facilitates attachment and detachment from the object being measured. [Solution] The device comprises a main shaft portion, a reciprocating shaft portion inserted into the main shaft portion and moving back and forth from the main shaft portion, a hook portion connected to the reciprocating shaft portion and engaging with the object to be measured, and a marker plate portion that extends in a direction perpendicular to the axial direction of the main shaft portion and has a marker portion attached to it. A base portion is provided on the main shaft portion at a position on the inner side of the shaft end for clamping the object to be measured together with the hook portion, and a mounting shaft portion is provided on the main shaft portion for housing the hook portion, and the connecting shaft between the reciprocating shaft portion and the hook portion is inserted at a position eccentric from the axial center of the mounting shaft portion.

Description

Technical Field

[0001] The present invention relates to an attachment, and particularly to an attachment for fixing a marker when measuring the three-dimensional shape of a measurement object using an optical scanner.

Background Art

[0002] When measuring the three-dimensional shape of a three-dimensional structure, recently, it is imaged using a portable optical scanner such as a handy scanner, and the image data after imaging is combined to generate digital data of the three-dimensional shape of the three-dimensional structure to be measured. In this case, a marker for alignment for combining the image data is installed on the surface of the three-dimensional structure to be measured.

[0003] Normally, the marker is attached to the surface of the three-dimensional structure to be measured by a magnet and its position is fixed. Since the magnet is detachable, it is convenient to handle. However, when the measurement object is a non-magnetic metal, resin, or the like, the marker cannot be fixed by a magnet.

[0004] Therefore, an attachment for fixing the marker by inserting it into a hole existing in the three-dimensional structure to be measured has been proposed (see Patent Document 1). According to the attachment disclosed in Patent Document 1, if there is a hole in the three-dimensional structure to be measured, it is easy to fix the marker by inserting it into the hole.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Subsequently, by further improving the structure of the attachment disclosed in Patent Document 1, it became possible to enhance its ability to fix to holes in the three-dimensional structure being measured.

[0007] Therefore, the present invention aims to provide an attachment for fixing a marker when measuring the three-dimensional shape of a measurement target using an optical scanner, which does not rely on magnets, improves the ability to fix to the three-dimensional structure of the measurement target, prevents displacement of the marker during measurement, and facilitates attachment and detachment from the measurement target. [Means for solving the problem]

[0008] In other words, the attachment of the embodiment is characterized by comprising a main shaft portion, a reciprocating shaft portion inserted into the main shaft portion and moving back and forth from the main shaft portion, a hook portion connected to the reciprocating shaft portion and engaging with the object to be measured, and a marker plate portion that extends in a direction perpendicular to the axial direction of the main shaft portion and has a marker portion attached to it.

[0009] Furthermore, the attachment may be provided with a base portion on the main shaft portion for clamping the object to be measured together with the hook portion.

[0010] Furthermore, in the attachment, the base portion may be provided on the main body shaft portion at a position outside the marker plate portion.

[0011] Furthermore, the attachment may be provided with a mounting shaft portion that houses the hook portion on the main shaft portion.

[0012] Furthermore, the attachment may have a recess formed in the mounting shaft portion for accommodating the hook portion.

[0013] Furthermore, in the attachment, the connecting shaft between the reciprocating shaft portion and the hook portion may be inserted at an eccentric position from the axial center of the mounting shaft portion.

[0014] Furthermore, the attachment may be provided with a spring material on the main shaft portion that biases the forward / backward shaft portion in the backward direction.

[0015] Furthermore, in the attachment, the main shaft portion may be formed from a first main shaft and a second main shaft, the first main shaft and the second main shaft may be connected by a screw, and the biasing force of the spring material may be adjusted by the forward or backward movement of the screw between the first main shaft and the second main shaft.

[0016] Furthermore, the attachment may be provided with a knob at the rear end of the reciprocating shaft. [Effects of the Invention]

[0017] The attachment according to the present invention comprises a main shaft portion, a reciprocating shaft portion inserted into the main shaft portion and moving back and forth from the main shaft portion, a hook portion connected to the reciprocating shaft portion and engaging with the object to be measured, and a marker plate portion that extends in a direction perpendicular to the axial direction of the main shaft portion and has a marker portion attached to it. Therefore, it is possible to improve the fixation to the three-dimensional structure of the object to be measured without relying on a magnet, prevent displacement of the marker during measurement, and facilitate attachment and detachment to the object to be measured. [Brief explanation of the drawing]

[0018] [Figure 1] This is a first cross-sectional view of the attachment of the embodiment. [Figure 2] This is a plan view of the attachment. [Figure 3] (A) First perspective view, (B) Second perspective view, and (C) Third perspective view of the vicinity of the hook portion of the attachment. [Figure 4] (A) A bottom view of the attachment, and (B) A schematic cross-sectional view of the attachment before engagement with the object to be measured. [Figure 5] (A) A schematic cross-sectional view of the attachment while it is engaged with the object being measured, and (B) A schematic cross-sectional view of the attachment when engagement with the object being measured is complete. [Modes for carrying out the invention]

[0019] The attachment of the embodiment is a connecting jig for installing a marker used for three-dimensional shape measurement on the surface of a measurement object. When measuring the surface shape of a three-dimensional structure with a complex shape such as a passenger car body or an instrument panel and generating digital data, currently, the surface of the measurement object is imaged using a portable optical scanner such as a handy scanner. Then, images taken from various directions are integrated to generate three-dimensional digital data. At this time, the marker is photographed together with the measurement object as a reference for the position, direction, etc. during photography. Therefore, image correction is performed based on the positional relationship of the marker in the image.

[0020] In the case of a passenger car body, if it is made of ferritic or martensitic stainless steel, it is easy to install the marker with a magnet as it is. However, in the case of an aluminum or carbon fiber - resin material body, the magnet will not stick. Also, the use of an adhesive such as double-sided tape may stain the vehicle body surface. Due to these circumstances, the attachment of the embodiment is adopted as a jig that can be firmly fixed for marker installation regardless of the material of the measurement object.

[0021] FIG. 1 is an overall cross-sectional view of the attachment 1 of the embodiment. In particular, FIG. 1 shows the normal state before being fixed to the measurement object. The attachment 1 includes a main body shaft portion 2 and a marker plate portion 20 provided on the main body shaft portion 2 to which a marker 21 (see FIG. 2) is attached. A forward and backward shaft portion 10 is inserted through the main body shaft portion 2. The forward and backward shaft portion 10 is capable of forward and backward movement (movement forward and backward in the axial direction) with respect to the main body shaft portion 2.

[0022] A hook portion 15 (see FIG. 4 etc.) is provided at the shaft end portion 11 of the forward and backward shaft portion 10. The hook portion 15 is connected to the forward and backward shaft portion 10 by a connection shaft 16. The hook portion 15 is used for fixing to a hole 55 formed in the measurement object 50. The marker plate portion 20 extends in a direction (lateral direction) perpendicular to the axial direction (vertical direction in the figure) of the main body shaft portion 2 (see FIG. 2). Also, a knob portion 13 is provided at the rear end portion 12 of the forward and backward shaft portion 10. The provision of the knob portion 13 makes it easier for the user of the attachment 1 to move when performing forward and backward movement and rotational movement with respect to the forward and backward shaft portion 10.

[0023] In the main shaft portion 2, a base portion 25 is provided at a position inside the shaft end portion 11, which holds the object to be measured 50 (see Figures 4 and 5) together with the hook portion 15. The base portion 25 is located inside the shaft end portion 11 and outside the marker plate portion 20 on the main shaft portion 2. As can be understood from the cross-sectional view in Figure 1, "inside the shaft end portion 11" refers to the direction returning upward from the position of the shaft end portion 11 (the lower end position of the second main shaft 2b of the main shaft portion 2) in the vertical direction of the illustrated paper (the longitudinal direction of the main shaft portion 2). Also, "outside the marker plate portion 20" refers to the downward direction from the marker plate portion 20 toward the shaft end portion 11 in the vertical direction of the illustrated paper (the longitudinal direction of the main shaft portion 2). Further below the base portion 25 (towards the tip), a mounting shaft portion 26 is provided. The mounting shaft portion 26 houses the hook portion 15 and is inserted into a hole 55 formed in the object to be measured 50. The mounting shaft portion 26 is responsible for positioning the attachment 1.

[0024] In the attachment 1 of this embodiment, the main shaft portion 2 is provided with a spring material 30 that biases the reciprocating shaft portion 10 in the retracting direction. In this embodiment, the spring material 30 is a helical coil spring. The reciprocating shaft portion 10 is provided with a projection 19, and the projection 19 is partially sandwiched between the spring material 30. Of course, the arrangement of the spring material 30 between the main shaft portion 2 and the reciprocating shaft portion 10 is not limited to the illustrated form.

[0025] Furthermore, in the attachment 1 of the embodiment, the main shaft portion 2 is formed from a first main shaft 2a and a second main shaft 2b. The first main shaft 2a and the second main shaft 2b, which constitute the main shaft portion 2, are connected to each other by screwing. The biasing force of the spring material 30 is adjusted by the forward (downward in the plane of Figure 1) or backward (upward in the plane of Figure 1) screwing of the first main shaft 2a and the second main shaft 2b. In the illustrated example, as the first main shaft 2a rotates and moves toward the second main shaft 2b side by screwing, the spring material 30 is compressed and the spring elastic force increases. Conversely, as the first main shaft 2a rotates and moves away from the second main shaft 2b side, the compressive force on the spring material 30 is weakened and the spring elastic force decreases.

[0026] Figure 2 is a plan view of the attachment 1 of the embodiment. That is, it shows the orientation in which the attachment 1 is fixed to the object to be measured and imaged using a portable optical scanner. In the illustrated embodiment, markers 21 are attached to the four corners of the marker plate portion 20. The size, shape, and color of the markers 21 are appropriate as long as they are optically detectable.

[0027] In Figure 2, the reciprocating shaft portion 10 is shown as a dashed circle within the circle of the knob portion 13. The mounting shaft portion 26 is shown as a dashed circle within the circle of the reciprocating shaft portion 10. And the connecting shaft 16 is shown as a dashed circle within the circle of the mounting shaft portion 26. The dashed line outside the circle of the knob portion 13 is a circle representing the base portion 25. As can be understood from the arrangement shown in the figure, the connecting shaft 16 that connects the reciprocating shaft portion 10 and the hook portion 15 is inserted at an eccentric position from the axis center of the mounting shaft portion 26. As will be described later, this is so that the hook portion 15 can be rotated around the axis center of the connecting shaft 16, causing the tip of the hook portion 15 to protrude from the mounting shaft portion 26. For this reason, the connecting shaft 16 is set at a position that is intentionally offset from the axis center of the mounting shaft portion 26. Note that the axis center of the connecting shaft 16 coincides with that of the reciprocating shaft portion 10, and the movement of the reciprocating shaft portion 10 can be directly transmitted.

[0028] Figures 3(A), (B), and (C) are perspective views of the vicinity of the hook portion 15 of the attachment 1 of the embodiment, taken from different directions. In Figure 3(A), the hook portion 15 is protruding from the mounting shaft portion 26 as the reciprocating shaft portion 10 moves forward. In Figure 3(B), the reciprocating shaft portion 10 has moved further forward, and the hook portion 15 has moved away from the mounting shaft portion 26. This is the state just before the object to be measured 50 (see Figures 4 and 5) is fixed by the hook portion 15.

[0029] As shown in the figure, the mounting shaft portion 26 has a recess 27 for accommodating the hook portion 15. Therefore, when inserting the mounting shaft portion 26 into the hole 55 of the object to be measured 50, collision between the hook portion 15 and the object to be measured 50 is avoided, and damage to both is suppressed.

[0030] Figure 3(C) shows the attachment 1 fixed to the hole 55 of the object to be measured 50. Compared to Figure 3(B), the orientation of the claws 17 of the hook portion 15 has rotated, so that the claws 17 protrude from the mounting shaft portion 26. In this way, the claws 17 of the hook portion 15 abut against the surface around the hole 55 of the object to be measured 50, and the object to be measured 50 is clamped between the claws 17 of the hook portion 15 and the base portion 25.

[0031] Figures 4 and 5 illustrate how attachment 1 is fixed to the object to be measured 50. Figure 4(A) is a bottom view of attachment 1 as seen from the hook portion 15 side. As can be seen from this figure, the connecting shaft 16 of the hook portion 15 is located eccentrically from the axial center of the mounting shaft portion 26. Figure 4(B) shows the state in which the mounting shaft portion 26 of attachment 1 is about to be inserted into the hole 55 of the object to be measured 50. The hook portion 15 is housed on the mounting shaft portion 26 side (recess 27), and no protrusion of the hook portion 15 from the mounting shaft portion 26 is observed.

[0032] Figure 5(A) shows the state in which the mounting shaft portion 26 of attachment 1 has passed through the hole 55 of the object to be measured 50. Even at this stage, the hook portion 15 is housed on the side of the mounting shaft portion 26 (recess 27), and no protrusion of the hook portion 15 from the mounting shaft portion 26 is observed. Figure 5(B) shows the state in which the mounting shaft portion 26 of attachment 1 has finished passing through the hole 55 of the object to be measured 50. As the mounting shaft portion 26 passes through the hole 55 of the object to be measured 50 and the base portion 25 comes into contact with the surface of the object to be measured 50, the movement of attachment 1 stops. At this point, the forward / backward shaft portion 10 is pushed in the forward direction (downward in the plane of the paper). Then, the hook portion 15 is rotated approximately 180°. As shown in the figure, the claws 17 of the hook portion 15, which were housed in the mounting shaft portion 26, protrude outwards from the mounting shaft portion 26, and the front and back surfaces of the object to be measured 50 are held by the attachment 1, sandwiched between the claws 17 and the base portion 25. In this way, the attachment 1 can be firmly fixed into the hole 55 of the object to be measured 50.

[0033] In addition, the biasing force of the spring material 30 in Figure 1 acts in a direction that pulls the hook portion 15 upward (lifts it upward on the paper). Therefore, the clamping force between the hook portion 15 (claw 17) and the base portion 25 is strengthened due to the biasing force of the spring material 30. [Explanation of Symbols]

[0034] 1 Attachment 2 Main shaft 2a First main axis 2b 2nd body axis 10 Advance / retract shaft part 11 Shaft end 12 Rear end 13. Knob section 15 Hook part 16 connecting shafts 17 Nails 19 Protrusion 20 Marker plate section 21 Marker 25 base 26 Mounting shaft 27 recess 30 spring material 50 Objects to be measured 55 holes

Claims

1. The main shaft and, A reciprocating shaft portion is inserted into the main body shaft portion and moves back and forth from the main body shaft portion, A hook portion connected to the aforementioned reciprocating shaft portion and engaging with the object to be measured, The marker plate portion extends in a direction perpendicular to the axial direction of the main body shaft portion and has a marker portion attached to it. An attachment characterized by the following:

2. The attachment according to claim 1, wherein the main body shaft is provided with a base portion for clamping an object to be measured together with the hook portion.

3. The attachment according to claim 2, wherein the base portion is provided on the main body shaft portion at a position outside the marker plate portion.

4. The attachment according to claim 1, wherein the main body shaft is provided with a mounting shaft portion for housing the hook portion.

5. The attachment according to claim 4, wherein a recess for accommodating the hook portion is formed in the mounting shaft portion.

6. The attachment according to claim 4, wherein the connecting shaft between the forward / backward shaft portion and the hook portion is inserted at an eccentric position from the axial center of the mounting shaft portion.

7. The attachment according to claim 1, wherein the main body shaft is provided with a spring material that biases the forward / backward shaft portion in the backward direction.

8. The attachment according to claim 7, wherein the main body shaft portion is formed from a first main body shaft and a second main body shaft, the first main body shaft and the second main body shaft are connected by a screw, and the biasing force of the spring material is adjusted by the forward or backward movement of the screw between the first main body shaft and the second main body shaft.

9. The attachment according to claim 1, wherein a knob is provided at the rear end of the forward / backward shaft portion.

Images