JPS5914149Y2 - Arm engagement structure in a device that marks a point on the floor directly above the ceiling - Google Patents

Description

[Detailed description of the invention] Purpose of the invention The invention aims to provide a structure that is perpendicular to the upper end of a pole that is protruded from the floor.
and an arm is engaged so as to be displaceable in a right angle direction, and both ends of the arm are provided so as to be able to touch the ceiling directly or indirectly, and a marker is provided at the upper end of the pole. The present invention relates to an arm retaining structure in a device for marking a surface.

The purpose of the present invention is to facilitate transportation, storage, etc. by making the arm foldable when not in use.

Conventional technology: An arm is attached to the upper end of a pole so as to be orthogonal to the T-shape, a support for the ceiling is provided at one end of the arm, a rotating member is provided at the other end, and a marker is provided at the upper end of the pole for hitting the ceiling. An example of such a device is described in Japanese Utility Model Application Publication No. 54-40642.

In this device, the arm is fixed to the pole, so
The arm got in the way during transportation and storage, which was inconvenient.

Structure of the invention The present invention enables the arm to be rotated with the rack formed on the arm disengaged from the gear protruding from the upper end of the pole, so that the arm and the pole can be aligned parallel to each other. Examples will be described below.

In FIGS. 1 to 4, a pole 1 has a sharp lower end so as to be protruded from the floor, and a plumb bob 2 as a vertical detection device is installed in the middle.

A scale plate 3 is located close to Th of the plumb bell 2a of this plumb swing 2.
is provided so that the vertical position of the pole 1 is detected by the plumb bob 2.

The hanging bell 2a and the scale plate 3 can be visually seen through the see-through window 4.

A marker 5 for marking the ceiling surface is provided at the upper end of the pole 1 so as to be slidable in the vertical direction.

The marker 5 is slid by operating the operating rod 6 in the vertical direction.

A rotary shaft 7 that is extendable and retractable is supported in parallel with the marker 5, a gear 8 is fixed to the upper end of the rotary shaft 7, and a bevel gear 9 is fixed to the lower end of the rotary shaft 7.

In order to configure the rotating shaft 7 to be expandable and retractable, the upper rotating shaft 7a and the lower rotating shaft 7b are connected by a tubular joint 7e, and the upper rotating shaft 7a is slidable in the axial direction within the tubular joint 7C, and What is necessary is just to insert and fit so that it may rotate integrally with 7 C of tubular joints.

The gear 8 is loaded with JpIO, and the gear 8 is always biased upward.

A roller 11 is rotatably protruded from the outer surface of the upper end of the pole 1.

The arm 12, which is assembled to the upper end of the pole 1 in a substantially T-shape so as to be perpendicular to the pole 1, has a U-shaped cross section with openings at the center of the lower and upper surfaces, and the arm 12 has a U-shaped cross section with openings at the center of the lower and upper surfaces. The roller 11 is fitted along the longitudinal direction of the side wall 12a, which corresponds to the outer width of the inner width pole 1 and is provided so that the pole 1 can be inserted into the arm 12 from the opening on the lower surface side. A guide groove 13 is provided for the purpose.

The distance m from the axis of the roller 11 to the outer surface 1a of the pole 1 is the distance m from the axis of the roller 11 to the top plate portion 12b of the arm 12.''
If the distance to the F plane is greater than n, a wide portion 13a is formed at the end of the guide groove 13, and the wide portion 13 is connected to the roller 1.
1 can be inserted.

When m and n are the same value or when n is larger than m, it is not necessary to provide the wide portion 13a.

The top plate portion 12b of the arm 12 has a long hole 1 along the longitudinal direction.
4, and a rack 15 that meshes with the gear 8 is formed on the inner peripheral edge of one side of the elongated hole 14.

The gear 8 is disengaged from the rack 15 when it is pushed down.

The tip of the marker 5 protrudes from the elongated hole]4.

One end of the arm 12 is open, a concave spherical seat 16 is formed on the upper surface, and a support 17 whose lower surface is formed into a spherical surface corresponding to the spherical seat 16 is mounted so as to be rotatable and slightly tiltable.

The other end of the arm 12 is closed by an end plate 12C, and a rotating body 18 is attached to the end plate 12C so as to be rotatable around a horizontal axis.

When pole 1 is held vertically, arm 12
is perpendicular to the pole 1, and the supporting body 17 and the rotating body 18 can come into contact with the ceiling surface C of the building.

A bevel gear 9 fixed to the lower end of the rotating shaft 7 is rotated by a handle 19 provided outside the pole 1.

Function of the invention In order to fold the device in the operating state shown in FIGS. 1 to 3 and store it in a case, etc., first displace the arm 12 with respect to the pole 1 in the direction of arrow S so that the roller 11 moves to the wide part. 12H (FIG. 4), the gear 8 is then pushed down with fingers to disengage the gear 8 and the rack 15, and the arm 12 is rotated in the direction of the arrow Q.

When the gear 8 and the rack 15 are disengaged, the arm 12 can rotate around the axis of the roller 11.

When the arm 12 is rotated by 90 degrees, the arm 12 is aligned parallel to the pole 1, and the arm 12 is fitted onto the pole 1 as shown in FIG.

At this time, since the roller 11 is interposed in the wide portion 13a and the roller 11 is in contact with a part of the inner peripheral edge of the wide portion 13a, the arm 12 is not displaced in the longitudinal direction.

To return the pole 1 and the arm 12 to their working condition, rotate the arm 12 in the direction of arrow Q', and when the rotation is complete, insert your finger into the arm 12 through the elongated hole 14 and turn the gear 8. By pressing down, gear 8 and rack 15 are prevented from interfering with each other, and when arm 12 is perpendicular to pole 1, gear 8 and rack 15 are engaged, and arm 12 is displaced in the direction of arrow S'. .

Effects of the Invention Although the present invention has the above-mentioned configuration, the arm can be folded when not needed, making it convenient for transportation and storage.

In particular, when the device is housed in a case, the structure of the case becomes simple and it becomes easy to house it in the case.

[Brief explanation of drawings]

FIG. 1 is a front vertical sectional view of an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a front view of the main part, and FIG. 4 is a front view of the main part showing the operation procedure. Explanation of the symbols of the main parts, 1... Paul, 5...
song? -Car 8...Tooth L 11, song, low 7-1
12・Curved・Arm, 12a...Side wall, 12b...Top plate part,
13... Guide groove, 14... Elongated hole, 15... Rack.

Claims (2)

[Scope of utility model registration request] (1) A pole 1 having a reference claw 20 at the lower end is provided, and an arm 12 with both ends capable of directly or indirectly contacting the ceiling surface is provided in a T-shape at the upper end of the pole 1.
A hitting point marker 5 whose axis coincides with the reference claw 20 is provided on the upper part of the pole so as to be movable in the vertical direction, and an operating rod 6 is provided in the middle part of the pole 1 so as to be movable in the vertical direction. In a device for marking a point on the floor directly above the ceiling, the pole 1 is equipped with a vertical detection device for detecting the verticality of the pole 1 in conjunction with the marker 5. A gear 8 is provided rotatably and movable up and down, the gear 8 is connected to a rotating shaft 7 supported on the pole 1, and the rotating shaft 7 is interlocked with an operating handle 19 attached to the lower part of the pole 1,
Further, a roller 11 is provided protruding from the upper side surface of the pole 1, and the arm 2 is formed in a cross-sectional shape with openings at the center portions of the lower surface side and the upper surface side, and the roller 11 is provided on the opposite side wall 12a of the arm 12. A rack 15 with which the gear 8 meshes is provided facing the opening of the top plate portion 12b of the arm 12, in which a guide groove 13 into which the pole 11 is fitted is provided in the form of a long hole along the longitudinal direction. The upper part of the arm 12 is inserted into the lower opening of the arm 12, the roller 11 is fitted into the guide groove 13, and the gear 8 is engaged with the rack 15. Combined structure. (2) An engagement structure of an arm in a device for marking a point on a floor surface to a ceiling surface directly above, as set forth in claim 1 of the Utility Model Registration Claim, in which the gear 8 is given a resilient force upward in the axial direction.