JP2001272229A - T-bar type supporting device for pipe laser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a T-bar type support device for a pipe laser, capable of easily performing work of elevating and lowering the pipe laser in a manhole. SOLUTION: The T-bar type supporting device for a pipe laser is provided with a T-bar to be fixed as a support in a horizontal direction in a vertical pipe, approximately columnar-shaped pipe laser to emit laser light, to indicate the direction of laying of a pipe member connected to the vertical pipe, pipe laser support base to support the pipe laser, elevating/lowering rod connected to the pipe laser support base, and elevating/lowering mechanism to elevate and lower the elevating/lowering rod with respect to the T-bar. The elevating/ lowering rod and pipe laser support base of the elevating/lowering mechanism are supported on the T-bar, in such a way that the axis of the elevating/ lowering rod passes through the approximate center of the pipe laser.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports a pipe laser which emits a laser beam for indicating a laying direction of a pipe member connected to a vertical pipe on a T-bar which is laterally stretched and fixed in a vertical pipe such as a manhole in pipe work. Related to the device.

[0002]

2. Description of the Related Art As a means for installing a pipe laser in a manhole (vertical tube), there are a mode in which the pipe laser is supported on a tripod placed at the bottom of the manhole, and a T-bar which is laterally stretched and fixed in the manhole vertical tube. There is a mode to support. However, the tripod is limited to the case where the bottom of the manhole is shallow, and when the bottom is deep, the T-bar type support device must be used.

In a conventional T-bar type supporting device, an intermediate supporting member called a trivet stand is interposed between a T-bar and a pipe laser. The trivet stand attached to and detached from the T-bar is provided with an arm which can be moved up and down by rotating a handle, and a coupling mechanism using a dovetail groove is provided between the arm and the pipe laser. However, in the conventional T-bar type support device, the weight balance between the T-bar and the pipe laser with the trivet stand interposed therebetween is poor, and it is difficult to perform the lifting operation performed by rotating the handle. In particular, during work in a narrow manhole, there is a possibility that the pipe laser may fall, which may cause breakage or failure. There is a similar problem when it is desired to change the laser emission direction of the pipe laser in the manhole.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pipe laser T-bar supporting apparatus which can easily perform a pipe laser ascent / descent operation based on the above awareness of the problem of the pipe laser T-bar supporting apparatus. I do. Another object of the present invention is to provide a T-bar type support device that can easily change the position of a pipe laser and the emission direction of laser light in a narrow vertical tube.

[0005]

SUMMARY OF THE INVENTION A T-bar type support device for a pipe laser according to the present invention is a T-bar that is fixedly stretched laterally in a vertical tube; A pipe laser support for supporting the pipe laser; an elevating rod coupled to the pipe laser support;
An elevating mechanism for elevating and lowering the bar, wherein the elevating rod and the pipe laser support of the elevating mechanism are supported on the T-bar such that the axis of the elevating rod passes substantially through the center of the pipe laser. And When the axis of the lifting rod passes through the center of the pipe laser in this way, the pipe laser can be raised and lowered without causing any moment between the lifting rod and the pipe laser, and a stable lifting operation can be performed. .

The elevating mechanism is, for example, a guide tube that restrains rotation of an elevating rod and is movably supported in the axial direction, and an elevating device that is restrained in the axial direction and is rotatably supported by the guide tube. When an operation screw shaft is provided and this elevating rod and the elevating operation screw shaft are screwed together, a device which is small and has excellent workability in a narrow vertical pipe can be obtained.

In order to support the pipe laser on its support, it is preferable to provide a shoe on the outer surface of the pipe laser and to provide a support groove for attaching and detaching the shoe to the pipe laser support. The shoe of the pipe laser has, for example, a trapezoidal section having a uniform cross section to form a pair of retaining grooves on both sides, and the supporting groove of the pipe laser support has, for example, A retaining projection corresponding to one of the retaining grooves can be provided, and a fixing screw engaging and disengaging with the other of the retaining grooves can be provided on the other. According to this attachment / detachment structure, the movable portion can attach / detach the pipe laser to / from the support groove from a direction orthogonal to the axis thereof only by the fixing screw.

In a preferred embodiment of the T-bar type supporting device of the present invention, a slider is supported on the T-bar so as to be movable, and the slider has a center on an axis perpendicular to a plane parallel to the moving direction of the slider. It is practical to support a rotatable table so as to be rotatable, and to support a lifting mechanism on the rotatable table. According to this configuration, the pipe laser can be set at any position and in any direction.

[0009]

FIG. 1 shows an example of a mode of use of a pipe laser 30 by a T-bar type support device 10. T
The bar-type support device 10 has a T-bar 11 that is stretched and fixed in a manhole (vertical tube) V, and a pipe laser 30 is supported on the T-bar 11. The cylindrical pipe laser 30 emits a laser beam L for indicating the direction (gradient) of the pipe member H connected to the vertical pipe V. T bar 11
Has a T-shape having a vertical arm 11V vertically extending along the wall surface of the vertical pipe V and a horizontal arm 11H connected perpendicularly to the middle of the vertical arm 11V. Further, a strut 11P for applying a strut to the inner wall of the vertical tube V by a spring force, a screw force or the like.

The lateral arm 11H of the T-bar 11 has a square cross section as shown in FIG.
A slider 12 is slidably fitted. The slider 12 is provided with a fixing screw 13 for fixing the slider 12 at an arbitrary position on the horizontal arm 11H.

A rotary table 15 is supported on the slider 12 so as to be rotatable about a rotation center axis (vertical axis) 14. A bubble tube 16 is provided on the turntable 15 for viewing the horizontal of the table. The slider 12 is provided with a fixing screw 17 for fixing the turntable 15 to the slider 12 after adjusting the rotation of the turntable 15.

A guide tube 18 parallel to the rotation center shaft 14 is fixed to the rotation table 15. Inside the guide tube 18, as shown in FIG. The screw shaft 19 is rotatably inserted while restricting axial movement. An operation knob 20 that is exposed at the lower end of the guide tube 18 is fixed to the lower end of the elevating operation screw shaft 19, and the elevating operation screw shaft 19 can be turned from outside.
An elevating rod 21 screwed into the elevating operation screw shaft 19 is inserted into the upper part of the guide cylinder 18, and a pipe laser support 22 is fixed to the upper end of the elevating rod 21. The elevating rod 21 includes a linear guide groove 21 a formed on the outer peripheral surface thereof in parallel with the axis, and a guide cylinder 18.
And only the axial movement is allowed by the guide projection 18a fitted in the straight guide groove 21a, and the rotation is restricted. Therefore, when the elevating operation screw shaft 19 is rotated through the operation knob 20, the elevating rod 21 moves straight and moves up and down. The guide cylinder 18, the elevating operation screw shaft 19, the operation knob 20, and the elevating rod 21 constitute an elevating mechanism that elevates the pipe laser support 22. 23
Is a rotation set screw of the operation knob 20 (elevation operation screw shaft 19), and 24 is an elevation set screw of the elevation rod 21. It is obvious that the lifting rod 21 may be provided with a straight guide groove in the guide cylinder and provided with a guide projection fitted in the groove, and may be guided in a straight line, contrary to the illustrated example.

The pipe laser support base 22 is formed with a pipe laser support groove 25 for attaching and detaching a shoe 31 fixed to the outer peripheral surface of the pipe laser 30. Shoe 3
1 is a cylindrical pipe laser 3 as is apparent from FIG.
0 and a pipe laser 3 whose width increases radially outward of the pipe laser 30.
Trapezoidal section 3 having a uniform cross section in a direction parallel to the axis 0
The trapezoidal section 33 forms a pair of retaining grooves 33a. This shoe 31
Are fixed to the pipe laser 30 by fixing screws 34, and a pair is provided at diametrically opposed positions of the pipe laser 30 as shown in FIG. Further, a stopper pin 35 is protruded from the outer surface of the shoe 31.

The pipe laser support groove 25 of the pipe laser support base 22 has a shape that allows the shoe 31 of the pipe laser 30 to be detachable from a direction perpendicular to the axis of the pipe laser 30 (a direction perpendicular to the laser beam L emitted by the pipe laser 30). I have. That is, the pipe laser support groove 25 has a box-shaped concave shape for receiving the shoe 31, and one of the pair of opposing wall surfaces has one of the retaining grooves 3 of the shoe 31.
A retaining projection 25a having a uniform cross section corresponding to 3a is formed. On the other hand, the other of the opposing wall surfaces of the support groove 25 is a vertical wall 25b which does not include such a retaining projection 25a and is parallel to the axis of the lifting rod 21.

On the pipe laser support 22, instead of the retaining projection 25 a, a fixing screw 2 is provided on the vertical wall 25 b side.
6 is screwed. That is, the tip lock portion 26a of the fixing screw 26 can advance and retreat into the pipe laser support groove 25. As shown in FIG. 5, at the retreat position of the fixing screw 26, the shoe 31 enters the pipe laser support groove 25. be able to. On the other hand, after the shoe 31 is fitted into the pipe laser support groove 25, the fixing screw 26 is tightened to cause the tip locking portion 26 a to enter the retaining groove 33 a of the shoe 31.
a can be engaged with the pair of retaining grooves 33a to prevent the shoe 31 from being removed (FIGS. 5 and 6). In the state shown in FIG. 6, the shoe 31 is connected to the pipe laser support groove 25 by slightly loosening the fixing screw 26.
Can be slid within the stopper pin 35
Can be positioned in contact with the end of the pipe laser support 22.

The axis of the elevating rod 21 for raising and lowering the pipe laser support 22 passes through the axis of the cylindrical pipe laser 30 supported by the support groove 25 of the pipe laser support 22. That is, the axis of (the extension of) the lifting rod 21 and the axis of the pipe laser 30 intersect at right angles.

The present apparatus having the above configuration can be used in the following manner. The T-bar type support device 10 is set in the vertical pipe V in a state where the fixing screw 26 is loosened and the pipe laser 30 is detached from the pipe laser support 22. During this setting, the horizontal arm 11H of the T-bar 11 is oriented in an appropriate direction, and the vertical arm 11H and the projecting portion 11P are brought into close contact with the diametrically opposed portion of the vertical tube V. The pipe laser support 22 of the T-bar support device 10 set in the vertical tube V in this manner.
, The pipe laser 30 is set. That is, the shoe 31 of the pipe laser 30 is fitted into the pipe laser support groove 25 from a direction perpendicular to the emission direction of the laser beam L (a direction perpendicular to the axial direction of the pipe laser 30), and the fixing screw 26 is temporarily tightened in the fitted state to fall off. (FIG. 5). Next, the shoe 31 is slid, the stopper pin 35 is brought into contact with the end of the pipe laser support base 22 and positioned, and the fixing screw 26 is fully tightened (FIG. 6). In the above mounting operation, the operation required on the T-bar type support device side is the fixing screw 2
Only the rotation operation of No. 6 allows easy operation even in a narrow vertical pipe.

The direction of the pipe laser 30 (the pipe laser 3
The direction of the laser beam L emitted from 0 can be adjusted by rotating the rotation table 15 about the rotation center axis 14, and the height can be adjusted by rotating the operation knob 20 to raise and lower the rod 21 (pipe laser). The height can be adjusted by adjusting the height of the support base 22). The horizontal position in the vertical pipe V can be adjusted by sliding the slider 12 on the horizontal arm 11H.

In particular, since the vertical adjustment performed against the weight of the pipe laser 30 is performed by the lifting and lowering operation of the lifting rod 21 which directly receives the weight of the pipe laser 30 on the center thereof, a harmful moment which impairs operability and strength is generated. You can do it without letting it go. Since the elevating rod 21 can be raised and lowered only by rotating the elevating operation screw shaft 19 coaxial with the rod 21 via the operation knob 20, the operability is excellent and the elevating mechanism itself is small. Suitable for working in narrow vertical pipes.

When removing the pipe laser 30, the fixing screw 26 may be loosened in the reverse of the above operation. The attachment / detachment operation of the pipe laser 30 to / from the pipe laser support base 22 can be performed not in the sliding operation of the shoe 31 with respect to the pipe laser support groove 25 but in the operation perpendicular to the emission direction of the laser light L. Work becomes easier, and the risk of damage and breakage can be reduced. In the illustrated embodiment, since the pipe laser 30 is provided with a pair of shoes 31 at diametrically opposed positions, the pipe laser 30 can be mounted on the pipe laser support 22 with the direction of the pipe laser 30 reversed by 180 °. is there.

The pipe laser 30 is mounted on the pipe laser support 22 from above as in the embodiment shown in FIGS. 1 to 7, and as in the embodiment shown in FIG. It is also possible to use it hanging on the rod 21).

[0022]

According to the present invention, the pipe laser supported on the T-bar can be moved up and down through the elevating rod whose axis passes through the approximate center of the pipe laser. Does not occur. Therefore, a stable lifting operation can be performed in a narrow vertical pipe.

[Brief description of the drawings]

FIG. 1 is an underground sectional view showing an example of a usage mode of a pipe laser supported by a T-bar type support device according to the present invention.

FIG. 2 is a perspective view of an embodiment of a T-bar support device and a pipe laser supported by the T-bar support device according to the present invention.

FIG. 3 is a longitudinal sectional view of one embodiment of a T-bar support device according to the present invention.

FIG. 4 is a perspective view showing the relationship between a support base on the T-bar type support device side and a shoe on the pipe laser side.

FIG. 5 is a sectional view showing an example of a procedure for attaching a shoe on the pipe laser side to a support base on the T-bar type support device side.

FIG. 6 is a cross-sectional view of the attachment completed state.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

FIG. 8 is a perspective view showing another T-bar type support device according to the present invention and another aspect of supporting a T-bar of a pipe laser supported by the T-bar type support device.

[Explanation of symbols]

 V Vertical pipe (manhole) H pipe member 10 T-bar type support device 11 T-bar 11H Lateral arm 11V Vertical arm 11P Stretching part 12 Slider 14 Rotation center axis (vertical axis) 15 Rotation table 18 Guide cylinder 19 Lifting operation screw shaft REFERENCE SIGNS LIST 20 operation knob 21 elevating rod 22 pipe laser support 25 pipe laser support groove 25 a retaining protrusion 25 b vertical wall 26 fixing screw 26 a distal end lock portion 30 pipe laser 31 shoe 32 concave cylindrical surface 33 trapezoidal section 33 a retaining groove

Claims (5)

[Claims] 1. A T which is laterally fixed in a vertical pipe
Bar; a substantially cylindrical pipe laser that emits a laser beam that indicates a direction in which a pipe member connected to the vertical pipe is laid; a pipe laser support that supports the pipe laser; an elevating rod coupled to the pipe laser support; An elevating mechanism for elevating and lowering the T-bar; and an elevating rod and a pipe laser support of the elevating mechanism,
A T-bar type support apparatus for a pipe laser, wherein an axis of the lifting rod is supported on a T-bar so as to pass through a substantially center of the pipe laser. 2. The T-bar type support device according to claim 1, wherein the lifting mechanism restrains rotation of the lifting rod and supports the lifting rod so that it can move in the axial direction. A pipe laser T-bar type support device comprising a lifting operation screw shaft which is constrained and rotatably supported, and wherein the lifting rod and the lifting operation screw shaft are screwed together. 3. The T-bar type support device for a pipe laser according to claim 1, wherein the pipe laser has a shoe on an outer surface, and the pipe laser support has a support groove for attaching and detaching the shoe. . 4. The T-bar type support device according to claim 3, wherein the shoe of the pipe laser has a trapezoidal section having a uniform cross section forming a pair of retaining grooves on both sides, and the support groove of the pipe laser support. Has a retaining projection corresponding to one of the pair of retaining grooves of the shoe on one of the opposing wall surfaces, and a fixing screw engaging and disengaging with the other of the retaining grooves on the other. T-bar support device. 5. The T-bar type supporting device according to claim 1, wherein a slider is supported on the T-bar so as to be movable, and the slider has a moving direction and a moving direction. A rotary table is supported so as to be rotatable around an axis perpendicular to a parallel plane, and the lifting table is supported by the rotary table.
Bar-type support device.