JPH08170901A - Right angle measuring instrument - Google Patents

Abstract

PURPOSE: To obtain a portable right angle measuring instrument requiring no assembling work at site. CONSTITUTION: The right angle measuring instrument 11 comprises two arm members 12, 13 hinged at one ends thereof, and a flexible member 22, e.g. a wire, having opposite ends fixed to the other ends of the arm members 12, 13 at predetermined positions thereof. The length and fixing position of the flexible member 22 are adjusted such that the base lines 23, 24 on the arm members 12, 13 substantially make a right angle when the flexible member 22 is stretched.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a right angle measuring tool for determining a right angle at a construction site, and more particularly to a right angle measuring tool used at a site such as a house.

[0002]

2. Description of the Related Art The so-called "Ogane", which is one of the carpentry tools, is a tool for determining a right angle in a horizontal plane, and is a relatively small-scale construction that does not use angle-measuring instruments such as transit. It is widely used in the field, for example, in the construction site such as a wooden house, to determine the right angle of the water thread of the earthwork.

FIG. 8 is a perspective view showing a conventional large rectangle 1. As can be seen in the figure, the length of the three sides of the large rectangle 1 is 3:
A right-angled triangle having a longest side of 4: 5 is formed.

In order to determine a right angle using the above-mentioned large rectangle 1,
First, such a large rectangle 1 is manufactured on the spot using a good material with little deviation, and then one of the two sides sandwiching a right angle is matched with a reference water thread. Then, by drawing a line of water along the other side and drawing out the black ink, it is possible to draw the black inks orthogonal to each other.

[0005]

However, in order to manufacture such a large rectangle in the field, it is usually necessary to have two workers, a worker who measures the size and a worker who holds the end portion. This caused the problem. In addition, it is inconvenient to manufacture on site, and there is a problem in terms of accuracy.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a portable right-angle measuring instrument which does not need to be manufactured on site.

[0007]

In order to achieve the above object, the right angle measuring tool of the present invention has the following features.
A state in which the two arm members hinge-joined at the ends and a flexible member such as a wire having both ends attached to predetermined positions of the other end of each arm member are stretched. In the above, the length of the flexible member or the mounting position thereof is adjusted so that the reference line on each of the arm members forms a substantially right angle.

Further, as described in claim 2, the right angle measuring tool of the present invention is such that two arm members hingedly joined at their ends and one arm member of the arm members can be pulled out to the other end. A reference line on each arm member in a state in which the flexible member such as a wire attached to the arm member is pulled out and the end portion is attached to the other end of the other arm member and extended. Is adjusted such that the length of the flexible member or the mounting position thereof is adjusted so as to form a substantially right angle.

Further, as described in claim 3, the right angle measuring tool of the present invention comprises two arm members hinge-joined at the ends and a predetermined mounting portion provided at the other end of each arm member. A diagonal member having both ends detachably attachable, and the length of the diagonal member such that the reference line on each of the arm members forms a substantially right angle in a state where the diagonal member is attached to the mounting portion and extended. Alternatively, the arrangement position of the mounting portion is adjusted.

Further, the right angle measuring tool of the present invention comprises the diagonal member of claim 3 made of a flexible member such as a wire.

Further, the right angle measuring tool of the present invention comprises the arm member according to any one of claims 1 to 3 so as to be extendable and contractible.

Further, the right angle measuring tool of the present invention comprises the arm member according to any one of claims 1 to 3 so as to be foldable, and has a locking mechanism capable of linearly locking the arm member. It is provided.

[0013]

In the right angle measuring tool according to the first aspect of the present invention, first, one of the two arm members is aligned with the reference black ink or water thread. Next, the other arm member is opened like a compass, and the flexible member is stretched straight without sagging. Next, a black thread is stretched in line with the other arm member to produce black ink, which is orthogonal to the reference black ink. After work,
The arm member is closed, and the flexible member is stored, for example, wrapped around the arm member or appropriately bundled, and is ready for the next use or carrying.

Here, when the arm member is configured to be extendable and contractible, it is used in a stretched state and stored or transported in a contracted state.

Further, in the right angle measuring tool according to the second aspect of the present invention, first, the flexible member is pulled out from one of the arm members, and its end is attached to the other arm member.
Next, one of the two arm members is fitted to the reference black ink or water thread. Hereinafter, similar to the invention according to claim 1, the other arm member is opened in a compass shape, the flexible member is extended straight without sagging, and a water thread is stretched to match the other arm member to produce the ink. , Black ink that is orthogonal to the reference black ink. Do the same after completing the work. The same applies to the case where the arm member is configured to be expandable and contractible.

In the right angle measuring tool according to the third aspect of the present invention, first, one of the two arm members is fitted to the reference black ink or water thread. Next, the other arm member is opened in a compass shape, and both ends of the diagonal member are attached to the attachment portions of the respective arm members. Here, when the diagonal member is formed of a flexible member, the diagonal member is straightened without sagging. When the diagonal member is made of a member that does not easily bend, such as an aluminum shaft, both ends are attached to the attachment portion while adjusting the opening angles of the two arm members. Next, a line of water is stretched in line with the other arm member to produce black ink, which is orthogonal to the reference black ink. After the work is completed, the diagonal member is removed from the arm member and the arm member is closed. On the other hand, when the detached diagonal member is made of a flexible member, it is wrapped around an arm member, for example, as in the invention according to claim 1, and is housed. When it is made of a member such as an aluminum shaft, the arm member is It is stored together with the members and prepared for the next use or transportation.

Here, when the arm member is configured to be extendable and contractible, it is used in a stretched state and is stored or transported in a contracted state.

When the arm member is constructed so as to be foldable, it is used in an expanded state. At that time, the arm member is held in a straight line by using a locking mechanism. After work,
Fold it back and store or transport it.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a right angle measuring tool of the present invention will be described below with reference to the accompanying drawings. It should be noted that parts and the like which are substantially the same as those of the conventional technique are designated by the same reference numerals and the description thereof will be omitted.

(First Embodiment) FIG. 1 is a view showing a right angle measuring tool according to the first embodiment. As can be seen from the figure, the right angle measuring tool 11 of the present embodiment has an arm member 12 and an arm member 13 hingedly joined at their respective ends so that they can be opened and closed centering on the rotary shaft 10. There is. The arm member 12 is configured such that the hollow boxes 14 to 17 are sequentially fitted into each other in a nested shape, and can be expanded and contracted. Similarly, the arm member 13
The hollow box bodies 18 to 21 are sequentially fitted in a nested manner so that they can be expanded and contracted.

A hollow box body 17 located at the other end of the arm member 12
A wire 22 as a flexible member is attached to the, and the other end of the wire 22 is attached to the hollow box body 21 located at the other end of the arm member 13.

With respect to the length of the wire 22 and its mounting position, the reference line 23 on the arm member 12 and the reference line 24 on the arm member 13 in a state where the arm members 12 and 13 are fully extended and the wire 22 is extended. It is adjusted so that and form an almost right angle.

That is, when the intersections of the reference line 23 and the reference line 24, the intersections of the reference line 23 and the wire 22, and the intersections of the reference line 24 and the wire 22 are A, B and C, respectively,
The length of the wire 22 and its mounting position are adjusted so that the square of the length of the line segment BC becomes equal to the sum of the square of the line segment AB and the square of the line segment AC. For example, the lengths of AB, AC, and BC may be 3 m, 4 m, and 5 m, respectively.

Next, the operation of the right angle measuring tool 11 of this embodiment will be described.

FIG. 2 shows a water thread 3 using a right angle measuring tool 11.
It is the perspective view which showed a mode that the right angle of 1 and 32 was measured.
As can be seen in the figure, in the right angle measuring tool 11 according to the present embodiment, first, the arm members 12 and 13 are extended,
One of the arm members 12 and 13, for example, the arm member 12 is fitted to the water thread 31 serving as a reference. That is, the reference line 23 of the arm member 12 and the water thread 31 are matched. Next, the other arm member 13 is opened in a compass shape around the rotating shaft 10 and the wire 22 is straightened without slackening. next,
The water thread 32 is stretched so as to coincide with the reference line 24 of the other arm member 13 and is made orthogonal to the water thread 31 serving as the reference, and ink is drawn out.

After the work is completed, the arm members 12 and 13 are respectively contracted, and the arm members 12 and 13 are rotated about the rotation axis to be closed. In addition, the wire 22 is wrapped around the arm members 12 and 13, for example, or bundled appropriately to be housed and prepared for the next use or carrying.

As described above, according to the right angle measuring tool of this embodiment, it is not necessary to manufacture a large rectangle at each site, and the burden on the worker is reduced. In addition, since the two arm members are hinge-joined and each arm member is configured to be expandable and contractible, the arm members are closed to make the whole slender when not in use, and the length is shortened by contracting each arm member. This makes it easy to store and carry. Also, when using the arm member, for example, a few meters
Since it can be extended up to, it is possible to secure sufficient accuracy.

In the present embodiment, the arm member can be expanded and contracted, but the arm member does not necessarily have to be expandable. Even in the case of such a configuration, if it is closed in a compass shape, it becomes an elongated shape as a whole, and storage and transportation are facilitated.

Further, although the present embodiment has been described as an example in which the right angle measuring tool of the present invention is applied to measure a right angle in a horizontal plane, it may be used to measure a right angle in a vertical plane.

(Second Embodiment) Next, a right angle measuring tool according to a second embodiment will be described. Note that the same reference numerals are given to components and the like that are substantially the same as those in the above-described embodiment, and description thereof will be omitted.

FIG. 3 shows a right angle measuring tool 41 according to the second embodiment.
It is the figure which showed. As can be seen from the figure, the right angle measuring tool 41 of the present embodiment has the arm member 12 and the arm member 13 hingedly joined to each other at their end portions so that they can be opened and closed about the rotation shaft 10. There is.

A hollow box body 17 located at the other end of the arm member 12
Has a built-in reel 42 for winding the wire 22, and when the arm member 12 and the arm member 13 are opened, the wire 22 is pulled out from the reel 42, and conversely, both members 12,
When closing 13, the wire 22 is automatically wound by the action of the spring in the reel 42. Also,
The other end of the wire 22 is attached to the hollow box body 21 located at the other end of the arm member 13.

The length of the wire 22 pulled out and its mounting position are set so that the arm members 12 and 13 are fully extended and the wire 22 is pulled out to the limit, and the reference line 23 on the arm member 12 and the arm member 13 are pulled out. Reference line 2
It is adjusted so that 4 and 4 form an almost right angle.

In the right angle measuring tool 41 according to the present embodiment, as with the right angle measuring tool 11 described in FIG. 2, first, the arm members 12 and 13 are fully extended and the arm member 1
Water thread 3 with one of 2, 13 as the reference, for example, the arm member 12
Set to 1. Next, while pulling out the wire 22 from the reel 42, the arm member 13 is opened in a compass shape around the rotating shaft 10. Next, when the wire 22 does not come out of the reel 42, the water thread 32 is made to coincide with the reference line 24 of the other arm member 13 and is orthogonal to the water thread 31 serving as the reference, and the black ink is ejected.

After the work is completed, while automatically winding the wire 22 around the reel 42, the arm members 12 and 13 are closed, and the arm members 12 and 13 are respectively retracted and stored for the next use or carrying.

As explained above, according to the right angle measuring tool of this embodiment, it is not necessary to manufacture a large rectangle at each site, and the burden on the worker is reduced. In addition, since the two arm members are hinge-joined and each arm member is configured to be expandable and contractible, the arm members are closed to make the whole slender when not in use, and the length is shortened by contracting each arm member. This makes it easy to store and carry. Also, when using the arm member, for example, a few meters
Since it can be extended up to, it is possible to secure sufficient accuracy.

Further, since the wire is wound on the reel, there is an effect that it does not get in the way when it is stored or carried.

In the present embodiment, the arm member is extendable and contractible, but the arm member need not necessarily be extendable. Even in the case of such a configuration, if it is closed in a compass shape, it becomes an elongated shape as a whole, and storage and transportation are facilitated.

(Third Embodiment) Next, a right angle measuring tool according to a third embodiment will be described. Note that the same reference numerals are given to components and the like that are substantially the same as those in the above-described embodiment, and description thereof will be omitted.

FIG. 4 shows a right angle measuring tool 51 according to the third embodiment.
It is the figure which showed. As can be seen from the figure, the right-angle measuring tool 51 of this embodiment also has the arm member 12 and the arm member 13 hingedly joined at their respective ends similarly to the above-described embodiments, and the rotary shaft 10 is centered. It can be opened and closed.

A hollow box body 17 located at the other end of the arm member 12
Is provided with a mounting portion 53 for mounting the wire 22 as a diagonal member, and the ring-shaped end portion 52 of the wire 22 can be hooked and fixed. Similarly, the hollow box body 21 located at the other end of the arm member 13 is provided with a mounting portion 53 for hooking and fixing the ring-shaped end portion 52 of the wire 22. The attachment portion 53 may have any structure or shape, but the wire 22
It is preferable that the arm members 12 and 13 are easily attached and detached, and that the arm members 12 and 13 are not easily detached when opening, for example, a hook shape.

The length of the wire 22 and its mounting position are such that the arm members 12 and 13 are fully extended and the wire member 22 is extended without sagging.
The upper reference line 23 and the reference line 24 on the arm member 13 are adjusted so as to form a substantially right angle.

In the right angle measuring tool 51 according to the present embodiment, as with the right angle measuring tool 11 described with reference to FIG. 2, first, the arm members 12 and 13 are fully extended and the arm member 1 is extended.
Water thread 3 with one of 2, 13 as the reference, for example, the arm member 12
Set to 1. Next, both ends 52, 52 of the wire 22 are hooked so as not to come off to the attachment portions 53, 53 provided on the arm members 12, 13, and the arm member 13 is centered around the rotating shaft 10 so that the wire 22 does not sag. Open in a compass shape. Next, the water thread 32 is made to coincide with the reference line 24 of the other arm member 13 and is orthogonal to the water thread 31 serving as the reference, and the black ink is drawn out.

After the work is completed, the wire 22 is removed from the mounting portion 53. In addition, the arm members 12 and 13 are closed, and the arm members 12 and 13 are respectively retracted and stored for the next use or carrying.

As described above, according to the right angle measuring tool of this embodiment, it is not necessary to manufacture a large rectangle at each site, and the burden on the worker is reduced. In addition, since the two arm members are hinge-joined and each arm member is configured to be expandable and contractible, the arm members are closed to make the whole slender when not in use, and the length is shortened by contracting each arm member. This makes it easy to store and carry. Also, when using the arm member, for example, a few meters
Since it can be extended up to, it is possible to secure sufficient accuracy.

In this embodiment, the arm member is made extendable and contractible, but the arm member does not necessarily have to be extendable. Even in the case of such a configuration, if it is closed in a compass shape, it becomes an elongated shape as a whole, and storage and transportation are facilitated.

Further, in this embodiment, the wire which is a flexible member is used as the diagonal member, but it is not always necessary to use the flexible member and the flexible member may be replaced with an easy material such as an aluminum shaft. It may be made of a member that does not bend. In that case, the shaft member may be configured to be expandable and contractible.

When the diagonal member is formed of such a shaft member, both ends of the diagonal member may be attached to the mounting portions while adjusting the opening angles of the two arm members. The removed diagonal member may be stored or carried together with the closed arm member.

(Fourth Embodiment) Next, a right angle measuring tool according to a fourth embodiment will be described. Note that the same reference numerals are given to components and the like that are substantially the same as those in the above-described embodiment, and description thereof will be omitted.

FIG. 5 shows a right angle measuring tool 61 according to the fourth embodiment.
It is the figure which showed. As can be seen from the figure, the right-angle measuring tool 61 of this embodiment also has the arm member 62 and the arm member 63 hinge-joined at their respective ends similarly to the above-described embodiments, and the rotary shaft 10 is centered. Although it can be opened and closed, unlike the first to third embodiments, each arm member 62, 63 is configured to be foldable. That is,
In the arm member 62, the member 64, the member 68, the member 69, and the member 70 are sequentially joined via the joint portion 71, and the arm member 63 similarly similarly connects the member 65, the member 66, and the member 67 via the joint portion 71. Are sequentially joined.

The wire 22 as a flexible member is fixed to the member 70 located at the other end of the arm member 62.
Similarly, the other end of the wire 22 is fixed to the member 63 located at the other end of the arm member 63.

As shown in FIG. 6, the length of the wire 22 and the mounting position thereof are such that the arm members 62 and 63 are fully expanded and the wire 22 is extended without sagging. 24 and the reference line 23 on the arm member 63 are adjusted so as to form a substantially right angle. For example, each member length of the members 64 to 70 (distance between rotation axes)
When the length is 1 m, the length of the wire 22 may be 5 m.

FIG. 7 shows the structure of the joint 71 as an example of the joint for joining the members 66 and 67, and a recess 81 is formed on the side of the member 66 facing the member 67.
On the side of the member 67 facing the member 66.
The protrusions 82 to be fitted to the arm members 6 are formed respectively.
When arms 2 and 63 are folded (Fig. (B))
When 2, 63 are opened (Fig. (C)), the adjacent member 6
6 and 67 are locked in a state where they are aligned in a straight line. That is, the concave portion 81 and the convex portion 82 are
It acts as a locking mechanism that locks adjacent members arranged in a straight line.

In the right angle measuring tool 61 according to the present embodiment, first, the folded arm members 62 and 63 are fully expanded and the convex portion 82 of the joint portion 71 is provided, similarly to the right angle measuring tool 11 described in FIG. Is fitted into the recess 81 and the arm members 62 and 63 are linearly locked. Next, one of the arm members 62 and 63, for example, the arm member 62 is fitted to the water thread 31 serving as a reference. Next, the arm member 63 is opened in a compass shape around the rotating shaft 10 so that the wire 22 does not sag. Next, the water thread 32 is attached to the reference line 24 of the other arm member 13.
Then, the ink is put out after the ink is stretched so as to be orthogonal to the reference water thread 31.

After the work is completed, the arm members 62 and 63 are closed, and the arm members 62 and 63 are folded to prepare for the next use or carrying.

As described above, according to the right angle measuring tool of this embodiment, it is not necessary to manufacture a large rectangle at each site, and the burden on the worker is reduced. In addition, since the two arm members are hinge-joined and each arm member is configured to be foldable, when not in use, each arm member is closed to elongate the whole, and each arm member is folded to shorten its length. This makes it easy to store and carry. In addition, since the arm member can be extended to several meters, for example, when used, sufficient accuracy can be ensured.

In this embodiment, the wire is fixed to the end of each arm member, but a reel may be used as in the second embodiment, or it may be detachable as in the third embodiment. It may be configured to be attached to. Further, instead of a flexible member such as a wire, a member such as an aluminum shaft may be detachably attached,
In that case, the shaft member may be configured to be expandable and contractible.

[0058]

As described above, according to the right angle measuring tool of the present invention, as described in claim 1, two arm members hingedly joined at their ends and a predetermined position of the other end of each arm member. A flexible member such as a wire with both ends attached to the length of the flexible member such that the reference line on each of the arm members is substantially perpendicular when the flexible member is extended. Since the mounting position is adjusted, a sufficient arm length can be secured during use to improve the accuracy of the right angle measurement, and portability can be improved during storage and transportation.

Further, as described in claim 2, the right angle measuring tool of the present invention is capable of being drawn out to two arm members hingedly joined at their ends and to the other end of one of the arm members. A reference line on each arm member in a state in which the flexible member such as a wire attached to the arm member is pulled out and the end portion is attached to the other end of the other arm member and extended. Since the length of the flexible member or the position where the flexible member is attached is adjusted so as to form a substantially right angle, a sufficient arm length is secured during use to improve the accuracy of the right angle measurement, and at the time of storage. It is possible to improve portability during transportation.

Further, as described in claim 3, the right angle measuring tool of the present invention has two arm members hinged at the ends and a predetermined mounting portion provided at the other end of each arm member. A diagonal member having both ends detachably attachable, and the length of the diagonal member such that the reference line on each of the arm members forms a substantially right angle in a state where the diagonal member is attached to the mounting portion and extended. Alternatively, since the mounting position of the mounting portion is adjusted, it is possible to secure a sufficient arm length during use to improve the accuracy of the right angle measurement and to improve portability during storage and transportation. it can.

[0061]

[Brief description of drawings]

FIG. 1 is a plan view of a right angle measuring tool according to a first embodiment,
FIG. 5A is a diagram showing a state in which the arm member is contracted, FIG. 9B is a state in which the arm member is extended, and FIG. 9C is a diagram showing a state in which the arm member is further opened.

FIG. 2 is a perspective view illustrating the operation of the right angle measuring tool according to the first embodiment.

FIG. 3 is a plan view of a right angle measuring tool according to a second embodiment,
FIG. 5A is a diagram showing a state in which the arm member is contracted, FIG. 9B is a state in which the arm member is extended, and FIG. 9C is a diagram showing a state in which the arm member is further opened.

FIG. 4 is a plan view of a right angle measuring tool according to a third embodiment,
FIG. 5A is a diagram showing a state in which the arm member is contracted, FIG. 9B is a state in which the arm member is extended, and FIG. 9C is a diagram showing a state in which the arm member is further opened.

FIG. 5 (a) is a side view of a right angle measuring tool according to a fourth embodiment,
(b) is also a plan view.

FIG. 6 is a plan view showing a state in which an arm member of a right angle measuring tool according to a fourth embodiment is expanded and opened.

FIG. 7A is an exploded cross-sectional view showing a joint portion of members constituting an arm member according to a fourth embodiment, FIG. 7B is a sectional view of the joint portion when the arm member is folded, and FIG. FIG. 4 is a cross-sectional view of the joint when the arm member is expanded.

FIG. 8 is a perspective view showing a conventional right angle measuring tool.

[Explanation of symbols]

 11, 41, 51, 61 Right angle measuring tool 12, 13, 62, 63 Arm member 22 Wire (flexible member, diagonal member) 53 Mounting portion 81 Recessed portion (locking mechanism) 82 Convex portion (locking mechanism) 23, 24 reference line

Claims (6)

[Claims] 1. A flexible member such as two arm members hingedly joined at their ends, and a flexible member such as a wire having both ends attached to a predetermined position of the other end of each arm member. A right-angle measuring tool characterized in that the length of the flexible member or the mounting position thereof is adjusted so that the reference line on each arm member is substantially right angle in the extended state. 2. An arm member comprising two arm members hingedly joined to each other and a flexible member such as a wire attached to the other end of one of the arm members so as to be freely drawn out. The length of the flexible member or the length of the flexible member such that the reference line on each of the arm members is substantially perpendicular when the flexible member is pulled out and its end is attached to the other end of the other arm member and extended. A right angle measuring instrument characterized in that its mounting position is adjusted. 3. An arm member comprising two arm members hingedly joined at their ends and a diagonal member whose both ends are detachably attachable to a predetermined attaching portion provided at the other end of each arm member. The length of the diagonal member or the mounting position of the mounting portion is adjusted so that the reference line on each of the arm members forms a substantially right angle when the material is attached to the mounting portion and extended. Right angle measuring tool. 4. The right angle measuring tool according to claim 3, wherein the diagonal member is made of a flexible member such as a wire. 5. The right angle measuring tool according to claim 1, wherein the arm member is configured to be extendable and retractable. 6. The right angle measuring tool according to claim 1, wherein the arm member is configured to be foldable, and a locking mechanism capable of linearly locking the arm member is provided.