JP2020114627A - Folding ruler - Google Patents

Abstract

To provide a folding ruler capable of measuring an angle formed by intersecting straight lines and continuously drawing lines at corner portions of straight lines intersecting at right angles.SOLUTION: The folding ruler comprises a pair of ruler bodies 10, 10 and a connecting body 20 for connecting one ends of the ruler bodies 10, 10. The connecting body 20 includes a link member 30 having two rotating shafts for rotatably supporting one ends of the ruler bodies 10, 10, and an angle adjusting member 40 capable of adjusting an angle between the ruler bodies 10, 10.SELECTED DRAWING: Figure 1

Description

The present invention relates to a multifunctional folding ruler capable of measuring an angle and drawing a straight line intersecting with it.

As an example of a conventional multifunctional folding ruler, one that can be folded by connecting a pair of straight line rulers has been proposed. In particular, the folding rulers described in Patent Documents 1 and 2 include straight lines. An angle scale is attached to a connecting body that connects the rulers, and the angle of the intersecting straight lines can be measured.

However, while the above-mentioned folding ruler is excellent in portability and can measure the angle of the intersecting straight line, the scale part for measuring the angle projects continuously from the right-angled corner part. It had a drawback that it hinders drawing a line.

Japanese Utility Model Publication No. 09-012027 Registered utility model No. 3004721

An object of the present invention is to provide a folding ruler that can measure an angle formed by intersecting straight lines and can continuously draw a line of a corner portion that intersects at a right angle.

In view of the above problems, the present invention comprises a pair of ruler bodies and a connecting body that connects one end of each of the ruler bodies, and the connecting body rotates each one end of each of the ruler bodies. It is characterized in that it has a link member having two rotating shafts for freely supporting the shaft and an angle adjusting member for adjusting the angle between the ruler bodies.

Further, in addition to the above-mentioned configuration, the pair of ruler bodies has a scale portion in which a scale of length is printed on the edge of a substantially rectangular flat plate, and an insertion portion formed in a concave shape for inserting the angle adjusting member, The insertion portion is formed by cutting out from the center of the lateral side of the ruler body to the longitudinal side surface so that the ruler body can be rotated by sliding contact with the outer peripheral surface of the link member. A first inner peripheral surface which is in sliding contact with the link member, and a second inner peripheral surface which is in sliding contact with the outer peripheral surface of the angle adjusting member formed at a position one step lower than the first inner peripheral surface, It is preferable to have

Further, the link member may have a holding portion for holding the surface of one end of each of the ruler bodies, and a receiving portion arranged on the back surface of the insertion portion of the ruler body for receiving the angle adjusting member. preferable.

Further, it is preferable that the lower end of the side surface of the receiving portion of the link member is fixed so as to be located on the same plane as the lower end of the side surface of the ruler body.

In addition to the above-mentioned configuration, the angle adjusting member is a flat plate that can be inserted into the insertion portion of the ruler body, and both ends of the flat plate are rotatably slidably in contact with the second inner peripheral surface of the insertion portion. Thus, it is preferable to have an outer peripheral surface and a convex portion that projects laterally from the outer peripheral surface and that engages with a concave portion of the second inner peripheral surface of the insertion portion of the ruler body.

It is preferable that the angle adjusting member has a groove portion formed so as to penetrate substantially in an arc shape from the front surface to the back surface of the flat plate so as to elastically deform the vicinity of the convex portion.

According to the invention described in claims 1 to 6, a folding ruler capable of measuring an angle formed by intersecting straight lines and continuously drawing lines at corner portions of straight lines intersecting at right angles. It is possible to provide.

It is the exploded perspective view seen from the back which shows an example of the folding ruler concerning the embodiment of the present invention. It is an exploded perspective view seen from the surface of FIG. It is a front view which shows the closed state of the folding ruler of FIG. It is the sectional view on the AA line of FIG. It is the (a) front view and the (b) rear view of the state which opened the folding ruler of FIG. 1 at right angle. It is the front view and the rear view which show the state which opened the folding ruler of FIG. 1 180 degrees. It is a figure which shows the cross-section of the lock member of FIG. 3, (a) BB line enlarged sectional view, (b) The enlarged sectional view which shows the state which slid the lock member. It is a conceptual diagram which shows the method of drawing the line which intersects at right angle using the folding ruler of FIG.

An embodiment of the present invention will be described in detail with reference to FIGS.

(Embodiment)
The folding ruler of the present invention includes a pair of ruler main bodies 10 and 10 and a connecting body 20 that connects one end of each of the ruler main bodies 10 and 10. The connecting body 20 includes the ruler main bodies 10 and 10. A link member 30 having two rotary shafts 21, 21 for pivotally supporting each at one end of the base, and an angle adjusting member 40 capable of adjusting the angle between the ruler bodies 10, 10. is there.

The ruler bodies 10 and 10 have graduation portions 11 and 11 having graduations printed on the edges of a substantially rectangular flat plate, and insertion portions 12 and 12 into which the angle adjusting member 40 is inserted.

The insertion part 12 can slide the ruler bodies 10, 10 from 0 degree to 90 degrees by slidingly contacting the recesses formed on the back surfaces of the ruler bodies 10, 10 and the outer peripheral surfaces 32b, 32b of the link member 30. As described above, the first inner peripheral surfaces 13 and 13 formed by cutting out in a substantially semicircular shape from the center of the side surfaces in the lateral direction of the ruler main bodies 10 to the side surfaces in the longitudinal direction, and the first inner peripheral surface 13 , 13 and second inner peripheral surfaces 14, 14 formed with a diameter smaller than that of the first inner peripheral surfaces 13, 13. Further, the insertion portion 12 has opening portions 15 and 15 for inserting first shaft portions 31a and 31a of the link member 30 described later.

The second inner peripheral surfaces 14, 14 have a plurality of recesses 14a, 14a that engage with projections 41a, 41a of the angle adjusting member 40 described later, and the recesses 14a, 14a have a substantially triangular cross section. It is formed in a shape and is arranged such that the apexes of a substantially triangular shape are located at intervals of about 15 degrees between 0 and 90 degrees.

The link member 30 constituting the connecting body 20 is provided with a holding portion 31 for holding the surface of one end of each of the ruler bodies 10 and 10 and an angle adjusting member 40 arranged on the back surface of each of the ruler bodies 10, 10. The receiving portion 32 and the ruler body by fitting the first shaft portions 31a and 31a of the pressing portion 31 and the second shaft portions 32a and 32a of the receiving portion 32, which will be described later, to each other. It has two rotation shafts 21 and 21 which rotatably support one ends of the respective 10, 10.

The pressing portion 31 is a thin plate and has two first shaft portions 31a, 31a formed so as to project from the surface of the thin plate. The tip ends of the first shaft portions 31a, 31a are bifurcated like a split pin, and by providing locking pawls 31b, 31b at the tip ends, the second shaft portion 32a of the receiving portion 32, which will be described later, is provided. The one end of each of the pair of ruler bodies 10 and 10 is rotatably connected by fitting and fixing to the formed fitted portion 32c.

The receiving portion 32 is a thin plate that covers a state in which at least the angle adjusting member 40 is inserted into the insertion portions 12, 12 of the ruler main bodies 10, 10, and both ends of the thin plate have a first inner circumference of the insertion portions 12, 12. It has a substantially circular arc shape so as to be in sliding contact with the surfaces 13 and 13, and has second shaft portions 32a and 32a formed so as to project from the surface thereof. The second shaft portions 32a, 32a have a substantially cylindrical shape with an open upper surface, and the inner peripheral surface into which the second shaft portions 32a, 32a are fitted and fixed with the engaging claws 31b of the first shaft portions 31a, 31a of the pressing portion 31. It has a fitted portion 32c in the shape of a protrusion along the.

In addition, the receiving portion 32 has the lower end of the side surface of the receiving portion 32 on the side surface of the ruler body 10 and 10 so that a straight line can be drawn without rattling when the folding ruler is installed on a flat surface. It is fixed to the insertion parts 12 and 12 so as to be located on the same plane as the lower end of the.

The angle adjusting member 40 is a flat plate that can be inserted into the insertion portions 12 and 12 of the ruler bodies 10 and 10. The angle adjustment member 40 rotates with the second inner peripheral surfaces 14 and 14 of the insertion portions 12 and 12 at both ends of the flat plate. The outer peripheral surfaces 41, 41 are formed in a substantially semicircular shape so as to freely slidably contact with each other, and the recesses 14a, 14a of the insertion portions 12, 12 formed so as to project laterally from the outer peripheral surfaces 41, 41 are engaged with each other. It has two convex portions 41a, 41a which fit together. Further, it has two opening portions 43, 43 for inserting and fixing into the second shaft portions 32a, 32a of the receiving portion 32.

Further, in the angle adjusting member 40, when the ruler bodies 10 and 10 are rotated, the convex portions 41a and 41a are slidably contacted between the concave portions 14a and 14a of the insertion portions 12 and 12, while the convex portions 41a and 41a are in the vicinity. In order to elastically deform and to easily pass over the recesses 14a, 14a, there are provided groove portions 42, 42 formed so as to penetrate from the front surface to the back surface of the flat plate in a substantially arc shape.

Further, as shown in FIG. 7, the other end of the ruler bodies 10 and 10 on the opposite side of the insertion portion is engaged with a lock member 50 that slides vertically to the longitudinal direction of the ruler bodies 10 and 10. The engaging portions 16 and 16 have a thickness smaller than that of the ruler bodies 10 and 10, and the cross sections of the engaging portions 16 and 16 are substantially U-shaped. It has a plurality of protrusions 16a, 16a that engage with the recessed portion 51 provided inside the V-shaped lock member 50.

FIG. 8 shows the vicinity of the folded ruler connected body when a line intersecting at right angles is drawn using the folding ruler of the above embodiment. The pair of ruler bodies 10 and 10 are at right angles. At this time, the side surface of one ruler body 10 and the side surface of the receiving portion 32 of the link member 30 become a continuous plane, and the side surface of the other ruler body 10 is arranged vertically from the side surface of the receiving portion 32. You can Moreover, since the lower end of the side surface of the ruler bodies 10 and 10 and the lower end of the side surface of the receiving portion 32 of the link member 30 are located on the same plane, it is possible to continuously draw the corner portion of the line L intersecting at a right angle. ..

Therefore, the folding ruler of the above-described embodiment is excellent in portability, can measure the angle of the intersecting straight lines easily, and can continuously draw the lines of the corners of the intersecting straight lines. It is possible to provide a tatami ruler.

10... Ruler body, 11... Scale part, 12... Insertion part, 13... First inner peripheral surface, 14... Second inner peripheral surface, 14a... Recessed part, 15... Opening part, 16... Engaging part, 16a...protrusion,
20...Coupling body, 21...Rotating shaft,
30... Link member,
31... Pressing part, 31a... First shaft part, 31b... Engaging claw,
32... Receiving part, 32a... Second shaft part, 32b... Outer peripheral surface, 32c... Fitted part,
40... Angle adjusting member, 41... Outer peripheral surface, 41a... Convex portion, 42... Groove portion, 43... Opening portion,
50...Lock member, 51...Dent part,
L... A line that intersects at a right angle.

Claims (6)

It comprises a pair of ruler bodies and a connecting body for connecting one end of each of the ruler bodies, and the connecting body has two ends for pivotally supporting each one end of the ruler body. A folding ruler comprising: a link member having a rotation axis; and an angle adjusting member for adjusting an angle between the ruler bodies. The pair of ruler bodies are provided with a scale portion in which a length scale is printed on the edge of a substantially rectangular flat plate, and an insertion portion formed in a concave shape for inserting the angle adjusting member. The portion is in sliding contact with the link member formed by cutting out from the center of the side surface in the lateral direction of the ruler body to the side surface in the longitudinal direction so that the ruler body can be rotated by slidingly contacting the outer peripheral surface of the link member. It has a 1st inner peripheral surface and a 2nd inner peripheral surface which slides in contact with the outer peripheral surface of the said angle adjustment member formed in the position one step lower than this 1st inner peripheral surface, It is characterized by the above-mentioned. The folding ruler according to Item 1. The link member has a holding portion for holding the surface of one end of each of the ruler body, and a receiving portion for receiving the angle adjusting member arranged on the back surface of the insertion portion of the ruler body. The folding ruler according to any one of claims 1 and 2. The folding ruler according to claim 3, wherein the lower end of the side surface of the receiving portion of the link member is fixed so as to be located on the same plane as the lower end of the side surface of the ruler body. The angle adjusting member is a flat plate that can be inserted into the insertion portion of the ruler body, and both ends of the flat plate have an outer peripheral surface so as to rotatably slidably contact the second inner peripheral surface of the insertion portion, and the outer peripheral surface. It has a convex part which protrudes laterally from the surface and which engages with the concave part of the second inner peripheral surface of the said insertion part of the said ruler main body, Either of Claim 1 or 2 characterized by the above-mentioned. Folding ruler described in. The angle adjusting member has a groove portion formed so as to penetrate substantially in an arc shape from the front surface to the back surface of the flat plate so as to elastically deform the vicinity of the convex portion. Folding ruler described in.

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