JP5272267B2 - Centering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a centering device for determining the center of a hole provided in the ceiling or the like for pipe arrangement and enabling one worker to accurately and easily determine the center of a measuring object hole 3. <P>SOLUTION: The centering device has a body 1, arms 2 whose angle to the body 1 can be changed, and a center display implement 4 showing a position directly below the center of the measuring object hole 3, and is latched to the peripheral part of the measuring object hole 3 by adjusting the opening angle of the arms 2. The arms 2 are set to three, respective arms 2 are provided at equal angle spaces. The centering device further has a vertically extended shaft body 5 formed with thread, a moving body 6 screwed with the thread of the shaft body 5 and moved vertically, and an operating part 7 for rotating the shaft body 5. Connecting pieces 8 are provided between the arms 2 and the moving body 6, and when the shaft body 5 is rotated normally and reversely, the arms 2 can be opened/closed following the vertical movement of the moving body 6. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a centering device for obtaining the center of a hole or the like provided in a ceiling for piping of various pipes.

  Conventionally, in order to obtain the center of a hole provided in the ceiling of a building for piping of various pipes or the like, as described in Non-Patent Document 1, a downward swing that allows a weight to be hung with a wire is used. This downward swing is used by fixing the upper end of the wire with a magnet or the like at a position on the ceiling surface at a predetermined distance from the hole and suspending the weight so as to reach the floor surface. The center of the hole can be obtained by adding the distance from the hole and the radius of the hole based on the position where the tip of the hole points on the floor surface.

  However, if the upper end of the wire cannot be fixed with a magnet, two workers, one who supports the upper end of the wire and one who measures the distance, are required. Also, if the upper end of the wire is supported manually, measurement may not be performed accurately due to camera shake, and errors may occur in the calculation of adding the radius of the hole to the distance from the hole. is there.

Tajima Tool Co., Ltd., “Tajima Mappy Quick Bra”, [Search February 2, 2009], Internet <URL: http://www.kouguya.com/QB.htm>

  Accordingly, an object of the present invention is to provide a centering device that allows one operator to accurately and easily determine the center of the hole to be measured.

  In order to solve the above problems, the present invention takes the following technical means.

The centering device of the present invention is provided with a body 1 and equiangular intervals so that the angle can be changed with respect to the body 1, one end is provided to the body 1 so as to be rotatable, and the other end is angle-changed above the one end. Is composed of a material having a large friction with the contact surface of the hole 3 to be measured and having elasticity, and has a shape in which the vicinity of the other end is bent in a substantially S shape, A shaft 5 having a screw formed thereon, a moving body 6 that is engaged with the screw of the shaft 5 and moved up and down, and is rotatably provided below the main body 1 for rotating the shaft 5. And a center indicator 4 indicating a position immediately below the center of the measurement target hole 3 at a position below the operation unit 7, and a connecting piece 8 provided between the arm 2 and the moving body 6. When the shaft body 5 is rotated forward and backward, the arm 2 opens and closes as the moving body 6 moves up and down. It is obtained as brought hooked around section or the outer peripheral surface of the measurement target hole 3 by adjusting the angle of opening of the arm 2.

The centering device of the present invention is the centering device according to claim 1, wherein the arm 2 is substantially vertical when the movable body 6 reaches the uppermost part of the movable range, and the movable body 6 is placed at the lowermost part of the movable range. The connecting piece 8 is set so that the arm 2 is substantially horizontal when it reaches.

The centering device according to the present invention is the centering device according to claim 1 or 2, wherein the length of the connecting piece 8 and the shaft 1 between the other end 8b of the connecting piece 8 in the arm 2 are connected to the main body 1. The combined length of the distance to the pivot point 1a is substantially the same as the distance from the moving body 6 to the upper end of the main body 1 when the moving body 6 reaches the uppermost part of the movable range.

  The centering device of the present invention has the above-described configuration, and can be hooked around the measurement target hole 3 using the arm 2, and the center indicator 4 is the measurement target hole. Since the position immediately below the center of 3 is indicated, the center of the measurement target hole 3 can be obtained accurately and easily by one operator.

It is explanatory drawing of the state which latched the centering apparatus of embodiment of this invention to the measuring object hole. It is explanatory drawing which showed the partial cross section of the centering apparatus of embodiment of this invention. It is explanatory drawing at the time of looking down from upper direction of the state which opened the arm of the centering apparatus of embodiment of this invention. It is a front view of the state where the arm of the centering device of an embodiment of this invention was closed.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the centering device has a main body 1, an arm 2 that can be changed in angle with respect to the main body 1, and a center indicator 4 that indicates a position immediately below the center of the measurement target hole 3. By adjusting the opening angle of the arm 2, the arm 2 can be hooked around the measurement target hole 3.

  The main body 1, the arm 2, the center indicator 4, and other constituent members can be made of metal, plastic, or other appropriate material. The main body 1 has a cylindrical shape, and is provided with a shaft body 5 extending in the vertical direction in which a screw is formed, a moving body 6 screwed into the screw of the shaft body 5, and an operation unit 7 for rotating the shaft body 5. ing.

  The shaft body 5 is a rod-shaped member that protrudes upward from the main body 1 along the center line (not shown) extending in the longitudinal direction of the main body 1. A screw is formed on the outer periphery of the shaft body 5 over almost the entire length. The length of the shaft body 5 may be set so that the upper end of the shaft body 5 and the upper end of a connecting piece 8 to be described later have substantially the same height when the arm 2 is closed substantially vertically (see FIG. 4).

  The moving body 6 has a cylindrical shape in which a screw to be screwed with the screw of the shaft body 5 is formed on the inner peripheral surface, and has a flange portion 6a with an enlarged upper end portion. A shaft attachment portion 6b for attaching one end of the connecting piece 8 connected to the arm 2 is provided.

  The operation unit 7 has a cylindrical shape having the same diameter as that of the main body 1 and is rotatable around the center line of the main body 1. A lower end portion of the shaft body 5 is fixed to the operation unit 7, and the shaft body 5 is also rotated when the operation unit 7 is rotated.

  As shown in FIG. 2, a winding device 9 for winding a wire 4 a of the center indicator 4 described later is provided inside the operation unit 7. The winding device 9 is configured such that a wire 4a is wound around the center line of the main body 1, and a wire threading portion 10 is provided below the winding wire 9a.

  The wire passing part 10 is formed with a through hole 10a into which the wire 4a extending in the longitudinal direction of the main body 1 can be inserted, and a recess 10b crossing the through hole 10a. The tool 11 is inserted and fitted into the recess 10b, and the wire 4a is sandwiched between the tip of the stopper 11 and the recess 10b. So that it can be maintained.

  A level 12 is provided on the outer periphery of the main body 1 so that it can be confirmed whether or not the main body 1 is inclined during measurement. In this embodiment, the level 12 is of the bubble cup type.

  The main body 1 is provided with three arms 2 via shaft mounting portions 1a. Each arm 2 is a rod-shaped member having a length of about several tens of centimeters. One end of the arm 2 is pivotally mounted on the pivoting portion 1a and can be raised and lowered. Although the number of arms 2 is not limited to three, it is desirable that each arm 2 be provided at equiangular intervals with respect to the center line of the main body 1. In the case of three arms 2, it is preferable to provide them at intervals of 120 degrees (see FIG. 3). Each arm 2 may be given a different color or pattern so that it can be distinguished from the other arms 2.

  The other end 2a of each arm 2 has a spherical shape, so that the arm 2 comes into contact with the peripheral portion of the measurement target hole 3 such as the inner peripheral surface 3a of the measurement target hole 3 provided on the ceiling and the upper peripheral surface 3b. I have to. The spherical other end 2a of the arm 2 can be made of a material such as rubber that has a large friction with the contact surface and is elastic. In addition, the vicinity of the other end 2a of each arm 2 is bent in two steps in a substantially S shape so that the other end 2a has a position and an angle at which it is easily caught around the measurement target hole 3. .

  A connecting piece 8 is provided between each arm 2 and the moving body 6. The connecting piece 8 has a rod shape, and its one end 8a and the other end 8b are rotatably attached to the moving body 6 and the arm 2, respectively. The one end 8a and the other end 8b can be pivotally attached to each other. The other end 8 b of the connecting piece 8 is attached to a position closer to the one end 1 a side than the center of the arm 2.

  When the shaft body 5 is rotated forward and backward, the moving body 6 moves up and down. That is, when the shaft body 5 is rotated in the forward direction (for example, clockwise when viewed from above), the shaft body 5 and the moving body 6 rotate relative to each other and the moving body 6 rises, and the shaft body 5 moves in the reverse direction. Is rotated in the opposite direction to that described above, and the moving body 6 is lowered. The connecting piece 8 moves up and down as the movable body 6 moves up and down, and the arm 2 can be opened and closed by raising and lowering the arm 2.

  The length of the connecting piece 8 and the attachment position of the other end 8b to the arm 2 are such that when the moving body 6 reaches the top of the movable range, the arm 2 becomes almost vertical, and the moving body 6 reaches the bottom. The arm 2 may be appropriately set so that the arm 2 opens almost horizontally. In this embodiment, as can be seen from FIG. 4, the length obtained by combining the length of the connecting piece 8 and the distance from the shaft attachment point of the arm 2 to the other end 8b of the connection piece 8 to the shaft attachment point 1a of the main body 1. However, the distance from the moving body 6 to the upper end of the main body 1 when the moving body 6 reaches the uppermost part of the movable range is substantially the same.

  The center indicator 4 has a configuration basically similar to that of the conventional downward swing composed of the wire 4a and the weight 4b, and is positioned below the main body 1. The wire 4a and the weight 4b are provided so as to be positioned on the extension of the center line of the main body 1. The center indicator 4 may be configured to indicate the center of the measurement target hole 3 on the floor surface by laser irradiation.

  In order to use this centering device, first, the main body 1 is lifted, and the other end 2a of each arm 2 is positioned in the vicinity of the circumference of the hole 3 to be measured.

  Then, each arm 2 is opened by rotating the operation unit 7. When the other end 2a of each arm 2 comes into contact with the peripheral portion of the measurement target hole 3, such as the inner peripheral surface 3a of the measurement target hole 3 of the measurement target hole 3 provided on the ceiling, or the upper peripheral surface 3b, etc. The centering device is hooked around the measurement target hole 3.

  Next, while looking at the level 12 of the main body 1, the angle of the main body 1 is adjusted so that the longitudinal direction of the main body 1 coincides with the vertical direction. Then, by releasing the stopper 11, the wire 4a of the center indicator 4 (down swing) is pulled out, and the weight 4b is lowered to the vicinity of the floor surface. The position of the floor surface directly below the weight 4 b is directly below the center of the measurement target hole 3.

  Since this centering device is attached as described above, the position directly above the position indicated by the center indicator 4 becomes the center position of the measurement target hole 3 as it is. Therefore, it is possible to measure the center of the measurement target hole 3 without requiring skill.

  The measurement target hole 3 may be a through hole or not, and is not limited to a hole provided in the ceiling, and may be a hole of a pipe arranged in the vertical direction near the ceiling. In this case, the other end 2a of the arm 2 can be brought into contact with the outer peripheral surface of the pipe and can be hooked. When the diameter of the pipe is relatively large, the arm 2 can be inserted inside the pipe, the arm 2 can be opened, and the other end 2a can be brought into contact with the inner peripheral surface of the pipe to be hooked.

  The above is a preferred embodiment of the present invention, but the present invention is not limited to the configuration of the above-described embodiment, and can be implemented by appropriately changing the material, shape, dimensions, and the like.

DESCRIPTION OF SYMBOLS 1 Main body 2 Arm 3 Measuring object hole 4 Center indicator 5 Shaft body 6 Moving body 8 Connection piece

Claims (3)

The body (1),
The main body (1) is provided at equiangular intervals so that the angle can be changed, and one end is rotatably provided on the main body (1), and the other end whose angle is changed above the one end is the measurement target hole (3). An arm (2) which is made of a material having a large friction with the contact surface and having elasticity, and has a shape in which the vicinity of the other end is bent in a substantially S shape;
A shaft (5) protruding upward from the body (1) and having a screw formed thereon;
A movable body (6) that is engaged with a screw of the shaft body (5) and moves up and down;
An operating portion (7) rotatably provided below the main body (1) for rotating the shaft body (5);
A center indicator (4) indicating a position immediately below the center of the measurement target hole (3) at a position below the operation unit (7);
A connecting piece (8) provided between the arm (2) and the moving body (6);
When the shaft (5) is rotated forward and backward, the arm (2) opens and closes as the moving body (6) moves up and down,
A centering device adapted to be hooked on the peripheral portion or the outer peripheral surface of the measurement target hole (3) by adjusting the opening angle of the arm (2). The arm (2) is substantially vertical when the movable body (6) reaches the top of the movable range, and the arm (2) is substantially horizontal when the movable body (6) reaches the bottom of the movable range. The centering device according to claim 1, wherein the connecting piece (8) is set. The length of the length of the connecting piece (8) and the distance from the axially attached portion of the arm (2) to the other end (8b) of the connecting piece (8) to the axially attached portion (1a) of the main body (1) The centering according to claim 1 or 2, wherein the distance from the movable body (6) to the upper end of the main body (1) when the movable body (6) reaches the uppermost part of the movable range is substantially the same. apparatus.

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