Gauge rod coupling tool

Abstract

To provide a gauge rod coupling tool that can prevent generation of rust.SOLUTION: A gauge rod coupling tool 1 comprises a pair of single-side holding bodies 2, 2 in each of which clamping arms 5, 5A slidably clamping a gauge rod are provided on both ends of a metal substrate 3, and the pair of single-side holding bodies 2, 2 is arranged back-to-back and the substrates 3, 3 of the pair of single-side holding bodies 2, 2 are rotatably connected to each other. A synthetic resin disk 51 is arranged between the substrates 3, 3 of the pair of single-side holding bodies 2, 2, and the substrates 3, 3 of the pair of single-side holding bodies 2, 2 are configured to freely rotate in a non-contact state with the use of the disk 51, so as to prevent a situation where sand or water enters between the metal substrates 3, 3 and rust is generated. Since the pair of single-side holding bodies 2, 2 and the disk 51 are configured to be assemblable and disassemblable, they can be disassembled to remove dust and water and can subsequently be assembled to each other.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a scale coupling tool including a pair of single-side holders provided with holding arms for slidably holding a scale at both ends of a substrate, and rotatably connecting the substrates of the pair of single-side holders.

Background Art

[0002] Conventionally, as this type of thing, L-shaped holding edges are provided on both side ends of a polymerization part, a spring piece is attached to the inner central part of one of the holding edges, and two single-side metal fittings provided with a shaft hole at the central part of the polymerization part are placed back to back. A pair of elastic plates provided with a convex part fitting into the shaft hole of the polymerization part at the central part of a disc is covered on both sides of the shaft hole part, and the central parts of both convex parts are pivotally attached with a bolt so that the central parts of both polymerization parts are crimped by both elastic plates (for example, Patent Document 1), or a pair of single-side metal fittings for slidably attaching two scales respectively are superposed back to back, both polymerization parts are rotatably connected, and the scale is held between the holding edges of each single-side metal fitting through the guide grooves of each guide (for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Disclosure of the Invention

Problems to be Solved by the Invention

[0004] In conventional scale couplers such as those in the above-mentioned Patent Documents 1 and 2, since they are mainly used for the inspection of the formed shapes in civil engineering and construction work, there are problems that water and sand enter the gaps of the scale coupler, and the iron-based main body and the rotating shaft are rusted. Furthermore, there is also a problem that the plating peels off due to the rubbing of metals against each other, making it easier for rust to progress. Also, since the main bodies are back-to-back, the entire contact part may rust and cause malfunction, and in some cases, the main body and the shaft may be fixed due to rust and break during rotation.

[0005] Summarizing the causes of rust, since the scale coupler is mainly used for the inspection of the formed shapes in civil engineering and construction work as described above, it is easy for water and sand to adhere. Also, sand and water may enter the gaps of the scale coupler, and due to the small gaps, capillary action may occur. Also, when the scale coupler rotates, the sand that has entered the gaps scrapes the surface of the scale coupler. Or, the plating may peel off because the same material metals rub against each other strongly. In this way, when the plating is scraped off, the main body material is exposed. And when water adheres to the part where the plating has peeled off, rust progresses easily.

[0006] As a result of rusting, when rust progresses, the rotation is inhibited by the rust generated in the gaps. Also, the metal plates are fixed to each other by the generated rust and cannot move. Furthermore, in some cases, the rivet pins of the rotating shaft rust, the main body and the shaft are fixed, and they may break during rotation.

[0007] In conventional scale couplers, since the sand and water that have entered the gaps cannot be wiped off, it is impossible to prevent the plating from being scraped off or the progress of rust caused by water. On the other hand, when sand enters the gaps, it may cause malfunction, so it may be washed away with water, but since the moisture cannot be wiped off after washing, rust progresses easily.

[0008] However, although separate from the problems of the present invention, with conventional scale couplers such as those in Patent Documents 1 and 2 above, to attach a scale, there was no choice but to insert the end portion in the length direction of the scale into the coupler, and after inserting the end portion of the scale, it was necessary to move it to an arbitrary position. Especially when the scale was long, the attachment work and the work when moving it to an arbitrary position became complicated, and the same work was also required when removing it.

[0009] Furthermore, since it was mainly used for the inspection of the formed shapes of civil engineering and construction works, there was also a problem that if sand or the like was caught between the scale coupler and the scale, the scale would be scraped when moving it to an arbitrary position.

[0010] The problem to be solved is to provide a scale coupler capable of preventing the generation of rust, and in addition, to provide a scale coupler that can be disassembled and assembled by the user.

Means for Solving the Problems

[0011] The invention according to claim 1 includes a pair of one-sided holders provided with holding arms for slidably holding a scale at both ends of a metal substrate, the pair of one-sided holders are arranged back to back, and in a scale coupler in which the substrates of the pair of one-sided holders are rotatably connected to each other, a synthetic resin intermediate member is arranged between the substrates of the pair of one-sided holders, and the intermediate member rotatably configures the substrates of the pair of one-sided holders in a non-contact state.

[0012] The invention according to claim 2 is characterized in that the pair of one-sided holders and the intermediate member are configured to be disassembled and assembled.

[0013] The invention according to claim 3 includes positioning means capable of positioning the rotational positions of one of the one-sided holders and the intermediate member, and is characterized in that the other one-sided holder and the intermediate member are configured to rotate integrally.

[0014] The invention according to claim 4 is provided with a rotation connection mechanism capable of rotatably connecting and disconnecting the substrates of the pair of single-sided holders, and the rotation connection mechanism is characterized by including screw means that can be disassembled and assembled to the pair of single-sided holders and the intermediate member.

[0015] The invention according to claim 5 is such that the rotation connection mechanism includes a central hole formed in the substrate of the pair of single-sided holders, one connecting body having one substrate clamping portion disposed on the inner surface side of one of the substrates, the other substrate clamping portion disposed on the inner surface side of the other substrate, and a cylinder body inserted through the central hole of the pair of single-sided holders and the intermediate member. The rotation connection mechanism further includes the other connecting body inserted through the cylinder body in a non-rotatable state with respect to the intermediate member. The one connecting body is connected to the other connecting body from the central hole of the one substrate, and the one and the other connecting bodies are configured to be connectable and disconnectable by the screw means.

Effects of the Invention

[0016] According to the configuration of claim 1, since the substrates of the pair of single-sided holders are configured to be rotatable in a non-contact state, it is possible to prevent sand and water from entering between the metal substrates and rust from occurring.

[0017] According to the configuration of claim 2, it can be assembled after being disassembled to remove dust and water.

[0018] According to the configuration of claim 3, with respect to one single-sided holder, the other single-sided holder and the intermediate member can be integrally rotated and positioned at the rotation position by the positioning means for use.

[0019] According to the configuration of claim 4, the connection between the substrates of the pair of single-sided holders can be released and disassembled by the screw means of the rotation connection mechanism, and after disassembly, it can be connected for use.

[0020] According to the configuration of claim 5, by releasing the connection between the substrates of the pair of one-sided holders by means of screws, the pair of one-sided holders and the intermediate member can be disassembled. Conversely, when assembled and the connection bodies on one side and the other side are connected by means of screws, the substrates of the pair of one-sided holders are clamped by the substrate clamping portions of the connection bodies on one side and the other side, and the scale coupling tool can be assembled.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Best Mode for Carrying Out the Invention

[0022] A preferred embodiment of the present invention will be described with reference to the accompanying drawings. It should be noted that the embodiments described below do not limit the content of the present invention described in the claims. Also, not all of the configurations described below are essential requirements of the present invention.

Examples

[0023] Example 1 of the present invention will be described with reference to FIGS. 1 to 13. The scale coupling tool 1 includes a pair of one-sided holders 2, 2 that are rotatably connected. Each of these one-sided holders 2 is provided with one-sided and the other-sided clamping arms 5, 5A at both ends in the width direction of a metal substrate 3 for slidably clamping a scale 4 from its width direction, and retaining portions 6, 6A are projectingly provided inwardly at the ends of these clamping arms 5, 5A. Then, the pair of one-sided holders 2, 2 are arranged back to back, and the substrates 3, 3 of the pair of one-sided holders 2, 2 can be rotatably connected and disconnected. Note that the substrate 3 has a square shape in plan view.

[0024] As shown in FIGS. 3 and 4, the one-sided and the other-sided clamping arms 5, 5A include clamping arm main bodies 11, 11A provided by bending both side edges of the metal substrate 3 in a direction intersecting with the substrate 3, and vertical plate portions 12, 12A made of synthetic resin provided on the inner surfaces of the clamping arm main bodies 11, 11A.

[0025] Also, the retaining portions 6, 6A include retaining portion main bodies 13, 13A provided by bending the ends of the clamping arm main bodies 11, 11A inward (toward the center of the substrate 3) and provided substantially parallel to the substrates 3, 3, and upper plate portions 14, 14A made of synthetic resin provided on the inner surfaces of the retaining portion main bodies 13, 13.

[0026] On the inner surface sides of the clamping arms 5 and 5A on the one side and the other side, one-side and other-side guide frame bodies 16 and 16A having a substantially U-shaped cross section are fixed. These guide frame bodies 16 and 16A are made of synthetic resin, and those made of engineering plastics excellent in fatigue resistance, friction resistance, and abrasion resistance such as POM (polyacetal) are used.

[0027] The one-side and other-side guide frame bodies 16 and 16A integrally include an upper plate portion 14 and 14A that constitute the inner surface of the retaining portions 6 and 6A, a lower plate portion 17 and 17A provided on the inner surface of the substrate 3, and vertical plate portions 12 and 12A that connect the outer ends of these upper plate portions 14 and 14A and the lower plate portions 17 and 17A, and form a substantially U-shape.

[0028] As shown in FIG. 4, on the tip side of the upper plate portion 14A of the other-side guide frame body 16A, a protrusion 14T is provided around the outer surface of the upper plate portion 14A. The tip surface of this protrusion 14T is formed as an inclined surface 14K serving as a guide portion that inclines so as to approach one side from the outer surface side toward the inner surface side in the thickness direction of the upper plate portion 14A. This inclined surface 14K is continuous with the upper part of the tip surface 14S of the upper plate portion 14A. Note that the tip surface 14S of the upper plate portion 14A that constitutes a part of the other-side retaining portion 6A is the inner edge portion of the retaining portion 6A.

[0029] Also, as shown in FIG. 3, on the tip side of the upper plate portion 14 of the one-side guide frame body 16, an inclined surface 14U serving as a guide portion is provided at the corner between the tip surface 14S and the inner surface 14N of the upper plate portion 14, and this inclined surface 14U faces the inner surface side of the substrate 3. Also, the interval K (FIG. 9) between the tip portion 15 of the inner surface 14N of the upper plate portion 14 of the one-side retaining portion 6 and the tip portion 15A of the inner surface 14N of the upper plate portion 14A of the other-side retaining portion 6A is narrower than the width W (FIG. 9) of the scale 4 (W>K). Note that the inclined surface 14U is provided between the inner surface 14N of the one-side upper plate portion 14 and the tip surface 14S of the one-side upper plate portion 14.

[0030] Further, the tip surface 14S thereof is provided flush with the tip surface 13S of the retaining portion main body 13 on one side. In the mounted state, one side edge portion 4F in the width direction of the scale 4 is sandwiched and held between the inner surface 14N and the lower plate portion 17 from the thickness direction, and the other side edge portion 4F in the width direction of the scale 4 is sandwiched and held between the inner surface 14N and the lower plate portion 17A from the thickness direction, resulting in a retaining state. In this way, the inner surfaces 14N, 14N of the upper plate portions 14, 14A of the retaining portions 6, 6A can abut against the inner or outer surface of the scale 4, and are abutting and pressing portions that prevent the scale 4 from being pulled out in the thickness direction from the clamping arms 5, 5A. Incidentally, as shown in FIG. 9, the interval between the upper plate portions 14, 14A and the lower plate portions 17, 17A is set slightly wider than the thickness of the scale 4 so that the scale 4 can be easily inserted, and there is a gap of about 0.5 to 2 mm (0.5 mm or more and 2 mm or less) therebetween.

[0031] As shown in the cross-sectional view of FIG. 5, the vertical plate portion 12 of the one-side guide frame body 16 has a substantially flat plate shape, and has obliquely outward inclined surfaces 18, 18 on the inner surfaces at both ends in the length direction. The boss portions 19, 19 protruding from the outer surfaces on both sides in the length direction of the vertical plate portion 12 are fitted into the fitting holes 20, 20 of the clamping arm main body 11 of the one-side clamping arm 5.

[0032] A spring piece 21 as a biasing means is attached to the inner surface of the vertical plate portion 12. This spring piece 21 is formed by bending a strip-shaped spring material to form arc-shaped portions 22, 22 on both sides, and a flat mounting portion 23 is formed between these arc-shaped portions 22, 22. A clamping pin 24 is inserted through the mounting portion 23 and the through hole 24H (FIG. 5) of the one-side clamping arm 5, and is clamped by the head portion 25 of the pin 24 and the clamping portion 26 on the outer surface of the clamping arm main body 11, so that the one-side guide frame body 16 and the spring piece 21 are attached to the inner surface of the clamping arm main body 11. Incidentally, the spring piece 21 is heat-treated so that no plastic deformation occurs when it is crushed.

[0033] The end portions 22T, 22T of the arc-shaped portions 22, 22 of the spring piece 21 are free ends, and the end portions 22T, 22T are oriented in substantially the same direction as the inclined surfaces 18, 18. It is preferable to attach them so that a gap of 1 mm or less is formed between the end portions 22T, 22T and the inclined surfaces 18, 18 of the vertical plate portion 12, but the gap is not essential.

[0034] In this case, due to dimensional errors or the like, if the end portions 22T, 22T of the arcuate portions 22, 22 are attached in a state of being pressed against the inclined surfaces 18, 18 of the vertical plate portion 12, and the spring pieces 21 are elastically deformed before a load is applied, there is a risk of impairing the predetermined performance as a spring. Therefore, the gap is provided so as not to deform in the attached state. Although it is preferable to provide the gap in this way, if the amount of deformation of the spring pieces 21 is slight, one or both of the end portions 22T, 22T may be in contact with the inclined surfaces 18, 18 of the vertical plate portion 12. Even when in contact, when being crushed by the scale 4, the end portions 22T, 22T can smoothly deform along the inclined surfaces 18, 18 inclined in the same direction as the end portions 22T, 22T so as to spread to both sides in the length direction. Also, in the attached state, as shown in FIG. 6, since a part of the arcuate portions 22, 22 protrudes inward from the front end surface 14S of the one-side guide frame body 16, it is easy to visually confirm the positions of the arcuate portions 22, 22 of the spring pieces 21, but it is not necessary for them to protrude.

[0035] As shown in FIG. 5, the vertical plate portion 12A of the other-side guide frame body 16A has a substantially flat plate shape, has obliquely outward inclined surfaces 18A, 18A on the inner surfaces at both ends in the length direction, and has boss portions 19A, 19A protruding from the outer surfaces on both sides in the length direction of the vertical plate portion 12A, which are fitted into the fitting holes 20A of the sandwiching arm main body 11A. Also, a flat mounting portion 23A recessed toward the vertical plate portion 12A side is provided at the center of the vertical plate portion 12A, and edge contact surfaces 28, 28 serving as edge contact portions where the edge portions 4F, 4F of the scale 4 abut are provided between the mounting portion 23A and the inclined surfaces 18A, 18A.

[0036] In addition, the inner surfaces of the sandwiching arm main bodies 11, 11A, the inner surface of the vertical plate portion 12, and the edge contact surfaces 28, 28 are parallel, and both edge contact surfaces 28, 28 are located on the same plane.

[0037] Then, the pin 24 for caulking is inserted through the mounting portion 23A, the vertical plate portion 12A, and the through hole 24H of the sandwiching arm main body 11A, and the other-side guide frame body 16A is attached to the inner surface of the sandwiching arm main body 11A by sandwiching it between the head portion 25 of the pin 24 and the caulking portion 26 on the outer surface of the sandwiching arm main body 11.

[0038] Next, a method for attaching the scale 4 to the one-sided holder 2 will be described. As shown in FIG. 9, one side edge 4F of the scale 4 (the right side when viewed in accordance with the direction of the reference numerals in FIG. 9) is inclined with respect to the substrate 3 so as to approach the substrate 3 from the other side edge 4F of the scale 4. By pushing the spring piece 21 to one side by one side edge 4F of the inclined scale 4, the distance K between the spring piece 21 and the tip surface 14S which is the inner edge of the retaining portion 6A on the other side is made equal to or greater than the width W of the scale 4. The spring piece 21 is deformed, and by pushing the other side edge 4F (the left side when viewed in accordance with the direction of the reference numerals in FIG. 9) toward the substrate 3 along the inclined surface 14K, the spring piece 21 is further deformed. As shown by the solid line in FIG. 9, the middle of the length direction of the scale 4 can be inserted between the retaining portions 6 and 6A on one side and the other side and the substrate 3.

[0039] Also, from the state shown by the solid line in FIG. 9, by pushing the spring piece 21 to one side by the edge 4F on one side of the scale 4 in the reverse procedure of the above-described attachment, the edge 4F on the other side can be removed through the tip surface 14S on the other side. At this time, since the inclined surface 14U serving as a guide portion is provided at the corner between the tip surface 14S and the inner surface 14N of the upper plate portion 14, the edge 4F side on the other side can be smoothly removed without hitting the corner.

[0040] Note that the upper spring piece 21 in FIG. 9 can be elastically deformed until the edge 4F of the scale 4 hits the head 25 of the pin 24, and the scale 4 can be pushed in further by this amount.

[0041] By providing the inclined surface 14K at the tip of the upper plate portion 14A of the other-side guide frame body 16A which is a component with less elasticity in this way, the scale 4 can be attached smoothly. In addition, since the one-sided holder 2 can be attached at a desired position of the scale 4, the amount of sliding of the one-sided holder 2 can be reduced for alignment after attachment, and it becomes excellent in usability.

[0042] Next, a rotation connection mechanism 41 that rotatably connects and disconnects the substrates 3, 3 of a pair of one-sided holders 2, 2 will be described below. In order to provide this rotation connection mechanism 41, a central hole 42 (FIG. 2), which is a rotation center hole, is formed in the center of the substrates 3, 3.

[0043] Further, on the substrate 3 of one of the one-sided holders 2, circular click positioning protrusions 43 are provided on the outer surface side at four positions at equal intervals in the circumferential direction on a virtual circle centered on the central hole 42. These four positioning protrusions 43 are arranged at equal intervals in the width direction and the length direction of the substrate 3, and adjacent positioning protrusions 43 are arranged at an angular position of 90 degrees centered on the central hole 42.

[0044] Furthermore, four circular fixing holes 44 are formed in the substrate 3 of the other one-sided holder 2 at positions corresponding to the positioning protrusions 43. These four fixing holes 44 are arranged at equal intervals in the width direction and the length direction of the substrate 3.

[0045] The rotation connection mechanism 41 includes a disk 51 that is an intermediate member disposed between the two substrates 3, 3. This disk 51 is made of synthetic resin and is made of the engineering plastic, which is a rigid member without elasticity. As shown in FIG. 12 and the like, on the other surface 51B of the disk 51, circular fixing protrusions 53 that fit into the fixing holes 44 are provided. Therefore, when the fixing protrusions 53 fit into the fixing holes 44, the other one-sided holder 2 and the disk 51 rotate integrally.

[0046] Also, since the intermediate member is a circular disk 51, in the same quadrilateral as the substrate 3, when the one-sided holders 2, 2 are rotated, for example, to an angle of 45 degrees between them, the corners of the quadrilateral are likely to be exposed. On the contrary, an intermediate member having a large area without being exposed can be obtained. By making it larger, the length from the outer peripheral position of the disk 51 to the end of the substrate 3 is shortened, and the force applied to the end of the substrate 3 is dispersed to the disk 51, so that the substrate 3 can be reinforced.

[0047] Also, as shown in FIG. 10, a circular positioning recess 52 into which the positioning projection 43 is fitted is formed on one surface 51A of the disk 51. The positioning projection 43 is fitted into the positioning recess 52. When the other one-sided holder 2 and the disk 51 are rotated 90 degrees with respect to one one-sided holder 2 from the state where the one-sided holders 2 on one side and the other side shown in FIG. 1 face in the same direction, the one-sided holders 2 on one side and the other side are positioned at a position where they intersect at 90 degrees.

[0048] In this way, the positioning projection 43 and the positioning recess 52 constitute a positioning means 45 (FIG. 6) capable of positioning the rotational positions of the one-sided holder 2 and the disk 51.

[0049] A substantially rectangular central cylindrical portion 54 is provided at the center of the disk 51, and this central cylindrical portion 54 corresponds to the central hole 42. Further, as shown in FIG. 2, etc., the rotation coupling mechanism 41 includes one coupling body 60 inserted into the central hole 42 of the one-sided holder 2 from the inner surface side of the substrate 3, and the other coupling body 70 inserted into the central hole 42 of the other one-sided holder 2 from the inner surface side of the substrate 3. These coupling bodies 60 and 70 are made of synthetic resin, and those made of the engineering plastic are used.

[0050] As shown in FIG. 7, the one coupling body 60 includes a polygonal square tube main body 61, a flange portion 62 serving as a substrate sandwiching portion that abuts against and holds the inner surface of the one substrate 3, and a stepped hole 63 having a stepped hole portion 63A formed through the center. A screw portion 64A of a screw 64 serving as screw means is inserted into the stepped hole 63, and the head 64B of the screw 64 is accommodated in the stepped portion 63A having a larger diameter.

[0051] In the assembled state, the substrate 3 of the other one-sided holder 2 and the disk 51 are connected in a non-rotatable state by the fitting of the fixing hole 44 of the other substrate 3 and the fixing projection 53 of the disk 51. By inserting the square tube body 71 of the other connecting body 70 into the central tube portion 54 of the disk 51, the other connecting body 70 is connected to the disk 51 in a non-rotatable state. By inserting the square tube body 61 of the one connecting body 60 into the stepped hole portion 73A of the other connecting body 70, the one connecting body 60 is connected to the other connecting body 70 in a non-rotatable state. The scale coupling tool 1 is assembled by screwing the screw 64 inserted through the stepped hole 63 of the one connecting body 60 and the double-stepped holes 73 of the other connecting body 70 into the nut 74 fixed to the other connecting body 70.

[0052] Therefore, even if the one-sided holder 2 is rotated with respect to the other one-sided holder 2, no force is applied to loosen the screw 64 by this rotation operation, and the screw 64 does not loosen during normal use. Supplementary, if the one connecting body 60 is missing, when the head 64B of the screw 64 is in pressure contact with the inner surface of the one substrate 3, or when a washer (not shown) is sandwiched between the head 64B and the one substrate 3, etc., a force to loosen the screw 64 is applied when the one-sided holders 2, 2 are rotated. Similarly, when the other connecting body 60 is rotatable with respect to the other connecting body 70, a force to loosen the screw 64 is applied when the one-sided holders 2, 2 are rotated. However, in the rotation connection mechanism 41 having the above configuration, no force to loosen the screw 64 is applied by the rotation operation of the one-sided holders 2, 2.

[0053] In addition, a cross groove 64C, which is a tool engagement portion, is formed in the head 64B of the screw 64, and a minus driver (not shown) is engaged therewith.

[0054] As shown in FIGS. 2 and 7, the other connecting body 70 includes a polygonal square tube main body 71, a flange portion 72 serving as a substrate sandwiching portion that abuts against and holds the inner surface of the other substrate 3, and a double stepped hole 73 having stepped hole portions 73A and 73B with steps at both ends formed through the center. The stepped portions 73A and 73B at both ends have a larger opening area than the central portion of the double stepped hole 73. A nut 74 into which the screw 64 is screwed is fixed in a non-rotatable state to the other stepped portion 73B on the other substrate 3 side of the double stepped hole 73. In this case, the stepped portion 73B has a polygonal shape corresponding to the nut 74, and the nut 74 is stored and fixed in the stepped portion 73B in a non-rotatable state.

[0055] Further, the square tube main body 61 of the one connecting body 60 is inserted into and removed from one stepped portion 73A on the one substrate 3 side of the double stepped hole 73. The stepped portion 73A has a polygonal shape corresponding to the square tube main body 61 of the one connecting body 60. The square tube main body 61 is inserted into and removed from one stepped portion 73A, and in the inserted state, the square tube main body 61 of the one connecting body 60 and the stepped portion 73A of the other connecting body 70 are connected in a non-rotatable state.

[0056] Therefore, by fitting the fixing hole 44 and the fixing projection 53, the disc 51 is connected to the substrate 3 of the other one-sided holder 2 in a non-rotatable state. The other connecting body 70 is connected to the disc 51 in a non-rotatable state, and the one connecting body 60 is connected to the other connecting body 70 in a non-rotatable state.

[0057] As a result, the one connecting body 60, the other connecting body 70, the disc 51, and the other one-sided holder 2 can rotate integrally. Further, by tightening the screw 64, the substrates 3, 3 and the disc 51 are sandwiched between the flange portions 62, 72 serving as substrate holding portions, and the flange portions 62, 72 are pressed against the inner surfaces of the substrates 3, 3.

[0058] Then, as shown in FIG. 2, a screw 64 is inserted into the stepped hole 63 from one side of the substrate 3, and the screw 64 is screwed into the nut 74 (FIG. 8), whereby the one-side holders 2, 2 are rotatably connected. In this state, the fixing projection 53 (FIG. 12) of the disk 51 is fitted into the fixing hole 44 of the other one-side holder 2, and the other one-side holder 2 and the disk 51 rotate integrally. Further, the other connecting body 70 fitted into the polygonal central cylindrical portion 54 of the disk 51 and the one connecting body 60 that rotates integrally with the other connecting body 70 rotate integrally with each other.

[0059] Therefore, when the other one-side holder 2 is rotated with respect to the one one-side holder 2, the other one-side holder 2, the disk 51, the one and the other connecting bodies 60, 70, and the screw 64 screwed into the nut 74 of the connecting body 70 rotate integrally. Further, since the one one-side holder 2 rotates with respect to the square cylindrical main body 71 of the other connecting body 70, no loosening force is applied to the screw 64 due to the rotation of the other one-side holder 2 with respect to the one one-side holder 2. Further, the portions in contact with the substrate 3 are the flange portions 62, 72 made of synthetic resin and the outer periphery of the square cylindrical main body 71, and in the rotation connection mechanism 41, no metal member contacts the metal substrates 3, 3.

[0060] Further, as shown in FIG. 13, on the inner periphery of the central cylindrical portion 54, four arc-shaped portions 54E, 54E, 54E, 54E are provided at equal intervals in the circumferential direction, and a linear flat portion 54H is provided between adjacent arc-shaped portions 54E, 54E. The four arc-shaped portions 54E, 54E, 54E, 54E are located on a virtual circle centered on the center of the central cylindrical portion 54.

[0061] Furthermore, the outer peripheral shape of the square cylindrical main body 71 corresponds to the inner peripheral shape of the central cylindrical portion 54. On the outer periphery of the square cylindrical main body 71, four arc-shaped portions 71E, 71E, 71E, 71E are provided at equal intervals in the circumferential direction, and a linear flat portion 71H is provided between adjacent arc-shaped portions 71E, 71E. The four arc-shaped portions 71E, 71E, 71E, 71E are located on a virtual circle centered on the double stepped holes 73 of the square cylindrical main body 71.

[0062] Therefore, when the square tube body 71 is inserted into the central tube portion 54, the disk 51 and the other connecting body 70 are connected in a non-rotatable state by the flat portions 54H and 71H.

[0063] On the other hand, as shown in FIG. 8, the square tube body 71 of the other connecting body 70 is loosely inserted into the central hole 42 of one side holder 2. Since the circular central hole 42 made of metal rotates with respect to the plurality of arc-shaped surfaces 71E, 71E, 71E, 71E made of plastic, the one side holder 2 can rotate smoothly about the square tube body 71. Incidentally, during rotation, the flange portion 62 slides on the inner surface of the substrate 3.

[0064] Incidentally, the inner peripheral surface of one stepped portion 73A and the outer peripheral surface of the square tube body 61 inserted into this inner peripheral surface are not formed with arc-shaped surfaces but are formed in a square tube shape.

[0065] When the one side holders 2, 2 rotate, one surface 51A of the disk 51 slides on the outer surface of the one substrate 3. On this one surface 51A, there are provided a side edge surface 54A of one side of the central tube portion 54 that is parallel to and located on the same plane as the other surface 51B of the disk 51, a sliding surface 55A of an annular portion 55 that is wider than the side edge surface 54A and centered on the central tube portion 54 and that connects the four positioning recesses 52, 52, 52, 52, a side edge surface 56A of a radial central side rib portion 56 that connects the sliding surface 55A and the side edge surface 54A, a side edge surface 57A of a cylindrical outer peripheral portion 57 provided at the outer peripheral edge of the disk 51, and a side edge surface 58A of a radial outer peripheral side rib portion 58 that connects the side edge surface 57A and the sliding surface 55A.

[0066] Incidentally, the rib portions 56 and 58 are arranged side by side on a virtual line (not shown) provided radially from the center of the central tube portion 54, and a plurality of them are provided at equal intervals in the circumferential direction.

[0067] Between the central cylindrical portion 54, the annular portion 55, and the central side rib portions 56, 56 adjacent to each other in the circumferential direction of the disk 51, a substantially fan-shaped central side recess 81 is formed by cutting out a small sector from a sector having a fan-shaped planar shape. An arcuate outer peripheral side recess 82 is formed between the sliding surface 55A, the outer peripheral portion 57, and the adjacent outer peripheral side rib portions 58, 58.

[0068] Further, on one side edge surface 54A of the central cylindrical portion 54, a groove portion 54M recessed in a semicircular shape is provided radially. On the sliding surface 55A of the annular portion 55, a groove portion 55M recessed in a semicircular shape is provided radially. On one side edge surface 57A of the outer peripheral portion 57, a groove portion 57M recessed in a semicircular shape is provided radially. As shown in FIG. 11, these groove portions 54M, 55M, 57M are arranged on a virtual line (not shown) provided radially from the center of the central cylindrical portion 54 and a plurality of them are provided at equal intervals in the circumferential direction.

[0069] The positioning recess 52 on the one surface 51A and the fixing protrusion 53 on the other surface 51B of the disk 51 are provided at the same planar position of the disk 51, and a through hole 83 is formed at the tip of the fixing protrusion 53 and opening into the positioning recess 52. In the assembled state, since the through hole 83 of the fixing protrusion 53 fitted into the fixing hole 44 opens to the inner surface of the substrate 3, dust in the positioning recess 52 can be discharged to the outside.

[0070] As shown in FIG. 12, on the other surface 51B of the disk 51, a circular recess 84 having a circular shape in plan view is formed so as to connect the fixing protrusions 53, and this circular recess 84 is provided corresponding to the annular portion 55 on the one surface 51A.

[0071] By providing the circular recess 84 corresponding to the annular portion 55 in this way, sink marks on the sliding surface 55A of the annular portion 55 during molding of the synthetic resin disk 51 can be prevented, the sliding surface 55A can be molded flat, and the positioning protrusion 43 can slide smoothly with respect to the sliding surface 55A.

[0072] Next, the assembly method will be described. Fit the fixing projection 53 into the fixing hole 44, and stack the other surface 51B of the disk 51 on the outer surface of the other substrate 3. Insert the square tube main body 71 of the other connecting body 70 into the central hole 42 of the substrate 3 and the central cylindrical portion 54 of the disk 51 from the inner surface side of the substrate 3, and bring the flange portion 72 into contact with the inner surface of the substrate 3.

[0073] Then, by inserting the square tube main body 61 into the square central cylindrical portion 54, the disk 51 and the other connecting body 70 are connected in a non-rotatable state and rotate integrally.

[0074] Stack the outer surface of one substrate 3 on one surface 51A of the disk 51, and insert the tip of the square tube main body 61 into the central hole 42 of one substrate 3. With the flange portion 72 of the other connecting body 70 in contact with the inner surface of the other substrate 3, the tip surface of the square tube main body 71 is flush with or lower than the inner surface of one substrate 3 and the tip of the square tube main body 71 is located within the central hole 42 of one substrate 3.

[0075] Insert the square tube main body 61 of one connecting body 60 from the inner surface side of one substrate 3 into one stepped portion 73A of the stepped hole 73 of the other connecting body 70. Insert screws 64 into the stepped holes 63 and 73, and screw the screws 64 into nuts 74 and tighten them. Thereby, the substrates 3, the disk 51, and the substrate 3 are clamped between the flange portions 62 and 72 and assembled. Also, in the reverse procedure of assembly, the screws 64 can be removed for disassembly.

[0076] Next, the usage method of the scale coupling tool 1 will be described. As described above, attach the one-sided holder 2 to a desired position in the longitudinal direction of the scale 4 and adjust the position. Then, when using the scales 4, 4 in the crossing direction, rotate one-sided holder 2 with respect to the other one-sided holder 2. The positioning projection 43 fits into the positioning recess 52 at the position where the scales 4, 4 cross, and is positioned and fixed at 90-degree intervals.

[0077] During rotation, the tip surface of the positioning projection 43 that has come out of the positioning recess 52 rides onto the sliding surface 55A and makes surface contact to slide. Since the substrate 3 and one surface 51A of the disk 51 are separated by the height of the projection 43, when the disk 51 rotates, sand or the like is not pinched between the portion of the substrate 3 other than the positioning projection 43 and the one surface 51A, and the outer surface of the substrate 3 is not scraped.

[0078] Also, even if sand or the like is pinched between the fixing projection 53 and the sliding surface 55A of the annular portion 55, the sand moves as the disk 51 rotates, and this sand fits into the groove portion 55M and is removed from the fixing projection 53.

[0079] When rotating the single-sided holders 2, 2 in this way, the tip surface of the positioning projection 43 of one substrate 3 only slides on the sliding surface 55A of the disk 51, and the substrates 3 do not slide against each other, preventing the generation of rust on the substrate 3 due to sliding of sand or the like.

[0080] Also, even if dust enters between the outer surface of the substrate 3 and one surface 51A of the disk 51 when the tip surface of the positioning projection 43 of one substrate 3 rides onto the sliding surface 55A of the disk 51, for example, the dust on the outer surface of the substrate 3 facing the sliding surface 55A accumulates in the groove portion 55M due to the rotation of the disk 51, and for example, the dust on the outer surface of the substrate 3 corresponding to the central rib portion 56 is scraped off by the central rib portion 56 as the disk 51 rotates and accumulates in the central recess 81. This can prevent dust from being pinched between the one surface 51A and the outer surface of the substrate 3 and rotating.

[0081] Also, when water accumulates in the central recess 81 and the outer peripheral recess 82, it can be discharged to the outside through the groove portions 54M, 55M, 57M.

[0082] And the dust accumulated in the groove portions 54M, 55M, 57M, the recesses 81, 82, and the positioning recess 52 can be easily removed by removing the single-sided holders 2, 2 to make the disk 51 a single body.

[0083] Also, if the screw 64 is loosened and removed, the pair of one-sided holders 2, 2, the disc 51, and the connecting bodies 60, 70 can be disassembled to remove internal dust and moisture.

[0084] Thus, in this embodiment, corresponding to claim 1, a pair of one-sided holders 2, 2 are provided, which have clamping arms 5, 5A for slidably clamping the scales 4 at both ends of the metal substrate 3. The pair of one-sided holders 2, 2 are arranged back to back, and in the scale coupler 1 where the substrates 3, 3 of the pair of one-sided holders 2, 2 are rotatably connected to each other, a disc 51, which is an intermediate member made of synthetic resin, is arranged between the substrates 3, 3 of the pair of one-sided holders 2, 2. Since the substrates 3, 3 of the pair of one-sided holders 2, 2 are configured to be rotatable in a non-contact state by this disc 51, it is possible to prevent sand or water from entering between the metal substrates 3, 3 and rust from occurring.

[0085] Thus, in this embodiment, corresponding to claim 2, since the pair of one-sided holders 2, 2 and the disc 51, which is an intermediate member, are configured to be disassemblable and assemblable, after disassembling to remove dust and water, they can be assembled. Note that disassemblable and assemblable means that in the case of caulking and fixing, the caulking member is broken for disassembly and thus cannot be assembled, but it means that it can be disassembled and assembled by a general tool such as a driver.

[0086] Thus, in this embodiment, corresponding to claim 3, since a positioning means 45 capable of positioning the rotational positions of one of the one-sided holders 2 and the disc 51, which is an intermediate member, is provided, and the other one-sided holder 2 and the disc 51, which is an intermediate member, are configured to rotate integrally, with respect to one of the one-sided holders 2, the other one-sided holder 2 and the disc 51 can be rotated integrally, and can be used by being positioned at the rotational position by the positioning means 45.

[0087] Thus, in this embodiment, corresponding to claim 4, a rotation connection mechanism 41 is provided for rotatably connecting and disconnecting the substrates 3, 3 of the pair of one-sided holders 2, 2. Since the rotation connection mechanism 41 includes a screw 64, which is a screw means that can be disassembled and assembled with the pair of one-sided holders 2, 2 and the disk 51 serving as an intermediate member, the connection between the substrates 3, 3 of the pair of one-sided holders 2, 2 can be released and disassembled by the screw 64 of the rotation connection mechanism 41, and after disassembly, they can be connected and used.

[0088] Thus, in this embodiment, corresponding to claim 5, the rotation connection mechanism 41 includes central holes 42, 42 formed in the substrates 3, 3 of the pair of one-sided holders 2, 2, one connection body 60 serving as one substrate clamping portion disposed on the inner surface side of one substrate 3 and having a flange portion 62, a flange portion 72 serving as the other substrate clamping portion disposed on the inner surface side of the other substrate 3, and a square tube body 71 serving as a cylinder body inserted through the central holes 42, 42 of the pair of one-sided holders 2, 2 and the disk 51 serving as an intermediate member. The rotation connection mechanism 41 further includes the other connection body 70 in which the square tube body 71 is inserted into the disk 51 in a non-rotatable state. One connection body 60 is connected from the central hole 42 of one substrate 3 to the other connection body 70, and the screw 64, which is a screw means, is configured to connect and disconnect the one and the other connection bodies 60, 70. Therefore, by releasing the connection between the substrates 3, 3 of the pair of one-sided holders 2, 2 with the screw 64, the pair of one-sided holders 2 and the disk 51 can be disassembled. Conversely, when assembled and the one and the other connection bodies 60, 70 are connected by the screw 64, the substrates 3, 3 of the pair of one-sided holders 2, 2 are clamped by the flange portions 62, 72 serving as the substrate clamping portions of the one and the other connection bodies 60, 70, and the scale coupler 1 can be assembled.

[0089] As an effect in the following embodiments, holding arms 5 and 5A for slidably clamping a scale 4 from the width direction of the scale 4 are provided on both ends of a substrate 3, and stopper portions 6 and 6A on one side and the other side for preventing the scale 4 from coming out are provided on the ends of these holding arms 5 and 5A on one side and the other side toward the center side of the substrate 3. A pair of single-side holders 2 and 2 for slidably holding the scale 4 from the thickness direction of the scale 4 are provided between the stopper portions 6 and 6A on one side and the other side and the substrate 3. The pair of single-side holders 2 and 2 are arranged back to back, and the substrates 3 of the pair of single-side holders 2 and 2 are rotatably connected to each other. In a scale coupling tool 1 provided with a spring piece 21 as biasing means for biasing one side edge portion 4F in the width direction of the scale 4 to the other side on the inner surface of the holding arm 5 on one side, the scale 4 is inclined with respect to the substrate 3 such that one side edge portion 4F of the scale 4 approaches the substrate 3 more closely than the other side edge portion 4F of the scale 4. By pushing the spring piece 21 to one side by the one side edge portion 4F of the inclined scale 4, the spring piece 21 is deformable such that the distance K between the spring piece 21 and the tip surface 14S which is the inner edge portion of the stopper portion 6A on the other side becomes equal to or greater than the width W of the scale 4. Therefore, by pushing the spring piece 21 to one side by the one side edge portion 4F of the inclined scale 4, when the distance K between the spring piece 21 and the tip surface 14S of the stopper portion 6A on the other side becomes equal to or greater than the width W of the scale 4, the other side edge portion 4F can be fitted into the holding arm 5A on the other side, and thereby the single-side holder 2 can be attached to a desired position of the scale 4.

[0090] Further, since an inclined surface 14K as a guiding portion for guiding the other side edge portion 4F of the scale 4 to one side is provided on the inner end side of the stopper portion 6A on the other side, the other side edge portion 4F of the scale 4 can be smoothly fitted into the holding arm 5A on the other side by the inclined surface 14K.

[0091] Also, an edge contact surface 28 as an edge contact portion where the other side edge portion 4F of the scale 4 abuts is provided on the inner surface of the holding arm 5A on the other side, and the tip surface 14S which is the inner edge portion of the stopper portion 6A on the other side is located closer to the center side of the substrate 3 than the edge contact surface 28 which is the edge contact portion. Therefore, the fitted other side edge portion 4F abuts against the edge contact surface 28, and the other side edge portion 4F side is held in a state of being sandwiched from the thickness direction between the stopper portion 6A on the other side and the substrate 3 side.

[0092] Also, as an effect in the embodiment, the spring piece 21 is attached such that the end portions 22T, 22T of the arc-shaped portions 22, 22 on both sides are free ends, and a gap is formed between these end portions 22T, 22T and the inclined surfaces 18, 18 of the vertical plate portion 12. Therefore, it is attached in a state before deformation, without losing its spring property. Moreover, when being crushed by the scale 4, the end portions 22T, 22T can smoothly deform along the inclined surfaces 18, 18 inclined in the same direction as the end portions 22T, 22T so as to spread to both sides in the length direction.

[0093] Also, when removing the scale 4, since the inclined surface 14U serving as a guide portion is provided at the corner portion between the front end surface 14S and the inner surface 14N of the upper plate portion 14, the other edge portion 4F side can be smoothly removed without hitting the corner portion.

[0094] The rotation connection mechanism 41 can insert the square tube main body 71 of the other connecting body 70 into the central tube portion 54 of the disc 51, thereby connecting the other connecting body 70 to the disc 51 in a non-rotatable state. Also, the square tube main body 61 of the one connecting body 60 is inserted and removed from one step portion 73A on the substrate 3 side of the double-step hole 73. In the inserted state, the square tube main body 61 of the one connecting body 60 and the step portion 73A of the other connecting body 70 are connected in a non-rotatable state. Further, by fitting the fixing hole 44 and the fixing protrusion 53, the disc 51 is connected to the substrate 3 of the other one-sided holder 2 in a non-rotatable state. Furthermore, by connecting the connecting bodies 60, 70 with screws 64, a pair of substrates 3, 3 and the disc 51 can be sandwiched between the flange portions 62, 72. Moreover, the square tube main body 71 of the other connecting body 70 is loosely inserted into the central hole 42 of the one-sided holder 2. Since the circular central hole 42 rotates with respect to the plurality of arc-shaped surface portions 71E, 71E, 71E, 71E made of synthetic resin, the one-sided holder 2 can rotate smoothly around the square tube main body 71.

[0095] In addition, in the assembled state, since the through hole 83 of the fixing projection 53 fitted into the fixing hole 44 of the disk 51 opens to the inner surface of the substrate 3, dust in the positioning recess 52 can be discharged to the outside. Further, during rotation, the tip surface of the positioning projection 43 that has come off the positioning recess 52 rides on the sliding surface 55A and makes surface contact and slides, and since one surface 51A of the substrate 3 and the disk 51 are separated by the height of the projection 43, when the disk 51 rotates, sand or the like is not pinched between the portion of the substrate 3 other than the positioning projection 43 and one surface 51A, and the outer surface of the substrate 3 is not scraped.

[0096] Also, when water accumulates in the central concave portion 81 and the outer peripheral concave portion 82, it can be discharged to the outside through the groove portions 54M, 55M, 57M. Further, even if sand or the like is pinched between the fixing projection 53 and the sliding surface 55A of the annular portion 55, the sand moves as the disk 51 rotates, and this sand fits into the groove portion 55M and is removed from the fixing projection 53.

[0097] Furthermore, even if dust enters between the outer surface of the substrate 3 and one surface 51A of the disk 51, for example, the dust on the outer surface of the substrate 3 facing the sliding surface 55A accumulates in the groove portion 55M due to the rotation of the disk 51. For example, the dust on the outer surface of the substrate 3 corresponding to the central rib portion 56 is scraped off by the central rib portion 56 as the disk 51 rotates and accumulates in the central concave portion 81. Thereby, it is possible to prevent dust from being pinched between one surface 51A and the outer surface of the substrate 3 and rotating. Also, when water accumulates in the central concave portion 81 and the outer peripheral concave portion 82, it can be discharged to the outside through the groove portions 54M, 55M, 57M.

[0098] In addition, since the lower plate portion 17 is wider than the upper plate portion 14, when the scale 4 is inserted obliquely, it is possible to prevent the edge portion 4F from hitting the outer surface of the substrate 3.

[0099] Also, since the intermediate member is a circular disc 51, in the case of a rectangle same as the substrate 3, when the one-side holders 2, 2 are rotated, for example, to an angle of 45 degrees between them, the corners are likely to be exposed. On the other hand, an intermediate member having a large area without being exposed can be obtained. By making it larger, the length from the outer peripheral position of the disc 51 to the end of the substrate 3 becomes shorter, the force applied to the end of the substrate 3 is dispersed to the disc 51, and the substrate 3 can be reinforced.

Embodiment

[0100] FIG. 14 shows a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted and will be described in detail. This figure shows a modified example of a guiding portion that guides the other side edge portion 4F of the scale 4 to one side.

[0101] As shown in this figure, the inclined surface 14K is formed as a convex curved surface 14W serving as a guiding portion. This curved surface 14W is curved so as to approach one side from the outer surface side toward the inner surface side in the thickness direction of the upper plate portion 14A.

[0102] Thus, in this embodiment, since the curved surface 14W serving as a guiding portion that guides the other side edge portion 4F of the scale 4 to one side is provided on the inner end side of the other-side retaining portion 6A, corresponding to the above-described respective claims, the same operations and effects as those in the first embodiment are achieved.

[0103] Furthermore, the present invention is not limited to the present embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, the guiding portion provided on the upper plate portion 14A may be a combination of an inclined surface 14K and a curved surface 14W. Also, in the embodiment, the inclined surface 14K, which is a guiding portion, is provided on the upper plate portion that constitutes a part of the retaining portion. However, a guiding portion may be provided on the retaining portion main body that constitutes a part of the retaining portion, or a guiding portion may be provided so as to straddle both the upper plate portion and the retaining portion. Furthermore, in the embodiment, a disc is exemplified as the intermediate member, but a rectangular plate may also be used. Also, in the embodiment, a screw having a plus groove is shown as the screw means, but a screw having a minus groove, a screw that is turned by a hexagonal wrench, or even a screw that is screwed into the other connecting body without using a nut may be used. Also, the combination of the members of the rotation connection mechanism is not limited to the embodiment, and various mechanisms can be used.

Explanation of Signs

[0104] 1 Scale Coupling Tool 2 One-Side Retaining Body 3 Substrate 4 Scale 4F Edge 5 One-Side Clamping Arm 5A Other-Side Clamping Arm 6,6 Retaining Portion 14K Inclined Surface (Guiding Portion) 14N Inner Surface (Contact Pressing Portion) 14S Tip Surface (Inner Edge Portion) 14W Curved Surface (Guiding Portion) 21 Spring Piece (Biasing Means) 28 Edge Contact Surface (Edge Contact Portion) 51 Disc (Intermediate Member) 60 One Connecting Body 61 Square Tube Body (Tube Body) 62 Flange Portion (Substrate Clamping Portion) 70 Other Connecting Body 71 Square Tube Body (Tube Body) 72 Flange Portion (Substrate Clamping Portion)

Claims

1. A pair of one-sided holders are provided with clamping arms that slidably clamp a scale at both ends of a metal substrate, In the scale coupler in which the pair of one-sided holders are arranged back to back and the substrates of the pair of one-sided holders are rotatably connected to each other, An intermediate member made of synthetic resin is disposed between the substrates of the pair of one-sided holders, and the substrates of the pair of one-sided holders are rotatably configured in a non-contact state by this intermediate member. A scale coupler characterized by this.

2. The scale coupler according to claim 1, characterized in that the pair of one-sided holders and the intermediate member are configured to be disassemblable and assemblable.

3. Positioning means capable of positioning the rotational positions of one of the one-sided holders and the intermediate member is provided, The scale coupler according to claim 1, characterized in that the other one-sided holder and the intermediate member are configured to rotate integrally.

4. A rotation connection mechanism capable of rotatably connecting and disconnecting the substrates of the pair of one-sided holders is provided, The rotation connection mechanism of the scale coupler according to claim 1, characterized in that it includes screw means that can be disassembled and assembled to the pair of one-sided holders and the intermediate member.

5. The rotation connection mechanism is A central hole drilled in the substrate of the pair of one-sided holders, One connecting body having one substrate clamping portion disposed on the inner surface side of one of the substrates, The other substrate clamping portion disposed on the inner surface side of the other substrate, and a cylindrical body inserted through the central hole of the pair of one-sided holders and the intermediate member. And a connecting body inserted through the intermediate member in a non-rotatable state, The one connecting body is connected from the central hole of the one substrate to the other connecting body, The scale coupler according to claim 4, characterized in that the one and the other connecting bodies are configured to be connectable and disconnectable by the screw means.

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