JPS6039764Y2 - room dimension measuring device - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a room dimension measuring device.

The actual dimensions of the rooms where tatami mats are laid are not necessarily the same even if the tatami flooring is the same, so we measure the actual dimensions of each room and manufacture tatami mats with dimensions that match the measurement results. There is.

Conventionally, as a dimension measuring instrument for measuring the actual dimensions of a room, four telescopic scales were attached to a base in a cross shape, and the base was fixed in the center of the room, and the four telescopic scales were attached in all directions. There is a known method in which the actual dimensions of the room are measured based on the stretched scale (see Japanese Utility Model Publication No. 3202 of 1983).

However, in the above-mentioned conventional room dimension measuring instrument, the extension scale is formed by telescopically combining a plurality of chevron-shaped pieces with lips whose cross-sectional dimensions are successively reduced. The straightness of the expansion scale is likely to be distorted due to the play in the moving surface,
If you make the individual chevron legs longer to make the linearity of this extension scale accurate, or if you increase the number of chevron legs combined to measure a large room, the entire measuring instrument will become larger and heavier. The disadvantage was that it was difficult to transport.

This invention provides a room size measuring instrument that is small, easy to transport, has little deviation, and can accurately measure the dimensions of the room regardless of its size.

Examples of this invention will be described below with reference to the drawings.

In FIG. 1, the room dimension measuring device A is a disc-shaped base 1.
, legs 2 that support the pedestal 1 horizontally, a laser projector 4 that is fixed on the pedestal 1 with a mounting bracket 3 and emits a laser beam vertically downward, a cover 5 of the laser projector 4, and a lower surface of the pedestal 1. It is composed of an outer cylinder 6 fixed at the center, a rotating cylinder 7 rotatably fitted into the outer cylinder 6, and the like.

As shown in FIGS. 2 and 3, the pedestal 1 has a central hole 1a at its center and an arcuate slot 1 near its periphery.
b are bored respectively, a ring-shaped projection 1c into which the lower end of the cover 5 is fitted and supported is formed on the upper surface of the pedestal 1, and a semicircular projection into which the flange 7a on the upper part of the rotating cylinder 7 is fitted into the lower surface. 1d are provided protrudingly from each other.

The above laser projector 4 is mounted so that the linear laser beam passes vertically downward through the center of the center hole 1a of the base 1.

As shown in FIG. 4, the outer cylinder 6 attached to the lower surface of the pedestal 1 has a flange 6a at its upper end, and four rectangular windows 6b bored at equal intervals of 90 degrees at its lower end. The flange 6a is fixed to the lower surface of the semicircular projection 1d of the base 1.

The rotating cylinder 7 that is fitted into the outer cylinder 6 has the flange 7a near its upper end, and two vertical slits 7b facing each other in the lower part of the cylinder.
When the rotary cylinder 7 is inserted into the outer cylinder 6 and rotated, the slit 7b overlaps and communicates with the window 6b of the outer cylinder 6 every time it rotates 90 degrees.

A lens holder 8 is fixed to the upper end of the rotating cylinder 7, and a cylindrical lens 9 is installed horizontally in a center hole 8a extending through the lens holder 8 so as to be perpendicular to the laser beam.

Furthermore, in the stepped portion 7c formed on the lower inner surface of the rotating cylinder 7,
A reflector 10 formed in a chevron-shaped cross section with an apex angle of 90 degrees is fixed via a circular base plate 11, and the laser beam is expanded by a cylindrical lens 9 only in a direction perpendicular to the axis of the cylindrical lens 9. The light beams S, S pass through the slit 7b and the window 6b. so that they move horizontally in opposite directions.

Note that a plumb-shaped tip 12 is fitted into the lower hole 7d of the rotary cylinder 7 so as to be vertically slidable.

As shown in FIGS. 3 and 4, a first arm 13 is fixed to the upper flange 7a of the rotating cylinder 7, and the first arm 13 is arranged so as to overlap the upper surface of the first arm 13.
A second arm 14, which is slightly wider than the second arm 14, is rotatably attached to the rotating cylinder 7.

A bolt hole 13a is formed at the tip of the first arm 13, and an elongated hole 14a which is long in the length direction of the second arm 14 is formed at the tip of the second arm 14. An eccentric cam 15 with a knob 15a is rotatably inserted into the arcuate slot 1b of the eccentric cam 15.
A bolt 16 is inserted from below into the shaft hole 15b bored in the shaft hole 15b and the bolt hole 13a of the first arm 13, and the head of the bolt 16 is fixed to the first arm 13 and projects above the eccentric cam 15. A locking nut 17 is screwed onto the tip of the bolt 16.

In FIG. 2, 18a and 18b are magnetic stoppers fixed to the lower surface of the pedestal 1, and the second arm 1 is
4, the rotation angle of the second arm 14 is 90 degrees.
and the second arm 14 is fixed by magnetic force.

In the above structure, when the dimension measuring device A is installed on the floor board so that the pedestal 1 is horizontal and the power supply circuit of the laser projector 4 is closed, a beam of light S, S that spreads in the width in the vertical direction is transmitted to the rotating cylinder 7. Light beams are horizontally projected from two opposing slits 7b, 7b in opposite directions through windows 6b, 6b of the outer cylinder 6 overlapping with the slits 7b, 7b, and this light beam S,
When S hits an object, for example, the straight scale 19 in Fig. 5, a mark M is projected in a straight line in the vertical direction on the hit area, so
Using this mark M, it is possible to measure the distance between the light beams S, S and the threshold 20 at an arbitrary distance from the dimension measuring device A.

Note that 21 is a floor plate.

At this time, the first arm 1 fixed to the upper part of the rotating cylinder 7
3 is integrally connected to the second arm 14 by screwing a locking nut 17 into the bolt 16. Since the second arm 14 is attracted to the magnetic stopper 18a, the mark M is not moved by vibration or the like. The position will not slip.

Then, when the locking nut 17 is loosened and the eccentric cam 15 is rotated using the knob 15a, the shaft hole 15b of the eccentric cam 15 is rotated.
Since the bolt 16 is inserted through the bolt 16 and the bolt 16 is fixed to the first arm 13, the first arm 13 and the first arm 13 are connected to each other while the second arm 14 is fixed to the magnet stopper 18a. The integral rotating cylinder 7 is slightly rotated, and the mark M is slightly moved horizontally on the straight scale 19.

Also, the second arm 14 is connected to the magnetic stopper 1.
The second arm 1 moves in the direction of arrow P in FIG. 2 against the gravitational force of 8a.
4 rotates until it hits the other magnetic stopper 18b, the rotating cylinder 7 is rotated by exactly 90 degrees, and the second arm 14 is attracted to the magnetic stopper 18b, so that the rotating cylinder 7 is brought to the above-mentioned rotational position. fixed, and the light beams S, S are projected in a direction perpendicular to the initial direction.

Moreover, since the laser projector 4 is used as the light source, the directivity of the beam S is good, and even if the position of the straight scale 19 is far away, the mark M is maintained in a thin straight line, making it easy to read the scale of the straight scale. It is easy and causes almost no errors.

Next, how to use the apparatus of the above embodiment will be explained with reference to FIG.

In FIG. 6, 20at 20bt 20c and 20d are thresholds around the room, and the above-mentioned dimension measuring device A is installed at an arbitrary position near the center of the room, and the threshold 2
0b and 20d, projecting the light beams S and S to project marks M and M2 onto the thresholds 20a and 20c;
The distance between this mark M19M2 and both ends of the threshold 20b is 1.
．． After finely adjusting the direction of the rotating cylinder 7 using the eccentric cam 15 so that 12 are equal, the above marks M, , M
Distance between 2 and both ends of threshold 2nd + 3. ]4 and the distance between the above mark Ml9M2 and the tip of the chip 12 under the pedestal 116. ] 6 are each measured using a straight scale 19.

Next, the second arm 14 is rotated 90 degrees to open the threshold 20b,
20d and mark M3. Reflect M, , threshold 2
0b, 20d mark M3. The distance between M and the chip 12 under the pedestal 1 is 17, 18, and the distance between the above mark M39M4 and the corner of the room is 19, 1□.

When measuring w '1N''12, the threshold 20a.20
Since the shape of the room surrounded by b, 20 C, and 20d is specified, it is possible to design a tatami mat to be laid in this room.

In addition, marks M,, M2. By selecting one or more points between M3°Ml and the corner of the room and measuring the distance between this point and the reference line M1M2 or M3M4, the shape of the room can be determined more accurately.

In the above embodiment, in its use distances 11 and 1□
Since it is possible to measure the actual size of the room even if the dimensions are not equal, the fine adjustment device consisting of the second arm 14, the eccentric cam 15, etc. may be omitted.

However, if the second arm 14 is omitted, the first arm 13 will of course come into contact with the magnetic stoppers 18a and 18b.

Note that a semi-cylindrical lens can be used instead of the cylindrical lens 9.

Note that since the slit 7b of the rotating cylinder 7 does not require an aperture function, an aperture of any shape such as a circle or a square may be provided in place of the slit 7b of a size that allows the beam S to pass through.

As explained above, in this invention, a laser projector is fixed above a horizontal pedestal with a center hole in such a way that its linear projected light beam passes vertically downward through the center hole. At the center of the lower surface, a rotary cylinder with two opposing openings perforated at the bottom is vertically and rotatably mounted, an arm is fixed to the upper part of the rotary cylinder, and the arm and the arm are fixed to the lower surface of the pedestal. The rotation angle of the rotating cylinder is 9 when in contact.
A magnetic stopper is provided to regulate the angle to 0 degrees, and a cylindrical lens and a reflector with a chevron-shaped cross section with an apex angle of 90 degrees are placed in order from top to bottom along the center line of the rotating cylinder, and this reflector is at the same height as the opening. Since the above-mentioned two apertures are located so that a beam of light with a width spread in the vertical direction is projected in two opposite horizontal directions, there is a straight line in the vertical direction on the left and right walls. After projecting the shaped mark, the rotating cylinder can be rotated 90 degrees to project the above linear mark on the wall in the front and rear directions, and when projecting, the arm can be fixed by suction with a magnetic stopper, and the above linear mark can be projected. Shaking can be prevented, and therefore the actual dimensions of a room can be accurately measured using these linear marks as a reference, regardless of the size of the room. Moreover, it is small and easy to transport.

[Brief explanation of drawings]

Fig. 1 is a front view of the embodiment of this invention, Fig. 2 is a plan view of the pedestal, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 2, and Fig. 4 is an exploded perspective view of the fine adjustment mechanism of the rotating cylinder. 5 is a vertical sectional view of the threshold of the room for explaining the usage, and FIG. 6 is a plan view of the room. 1: Pedestal, 1a: Center hole, 4: Floodlight, 7: Rotating cylinder,
7b = slit (aperture), 9: cylindrical lens, 10: reflector, 14 near-11, 18a, 18b: magnet stopper, L: laser beam (projection beam), S: beam bundle.

Claims (1)

[Scope of utility model registration request] A laser projector is fixed to the upper surface of a horizontal pedestal with a center hole bored in it so that its linear projected light beam passes vertically downward through the center hole, and two
A rotating cylinder with opposing openings is installed vertically and rotatably, an arm is fixed to the upper part of the rotating cylinder, and the arm contacts the bottom surface of the pedestal to rotate the rotating cylinder. A magnetic stopper is provided to regulate the angle to 90 degrees, and a cylindrical lens and a reflector with a chevron-shaped cross section with an apex angle of 90 degrees are placed in order from top to bottom along the center line of the rotating cylinder, and this reflector is the same as the opening described above. A room dimension measuring instrument, characterized in that the two openings are located at a height and emit a beam of light having a vertical width in two opposite horizontal directions.