JPS6320534Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a polishing device used for polishing the inner surface of pipes such as gas pipes and water pipes.

When repairing steel pipes, cast iron pipes, etc. from the inside, it is necessary to polish the surfaces to which adhesives, paints, etc. are applied, or the areas to be welded to remove rust and other stains. Conventionally, workers enter the pipe and perform manual polishing using tools such as hand grinders, but manual work inside the dark pipe requires a great deal of effort and takes a long time. Therefore, there was a demand for mechanization of polishing work to reduce labor and increase efficiency.

Furthermore, as seen in Japanese Patent Application Laid-Open No. 52-112193, an apparatus has been proposed which polishes the inner surface of a tube by running a traveling carriage equipped with an abrasive member inside the tube. However, in the case of this prior art, the entire large and heavy cart is moved forward little by little using wheels, and polishing is progressed little by little. This makes it difficult to move the cart during polishing, and for example, if the cart is If the pipe slips and does not move smoothly, or if the pipe is slanted, the cart will not move forward properly. As a result, the polishing member cannot move accurately in the tube axis direction, which not only hinders the polishing operation but also causes polishing defects. In addition, in the above-mentioned prior art, an extremely complicated mechanism using sliding cones, links, restoring springs, etc. is used to press the abrasive member against the inner surface of the tube and to pull it away from the inner surface of the tube, so the entire device is In addition to being large in size, it also has drawbacks such as not being easy to control its operation.

The present invention was developed based on the above circumstances, and its purpose is to reduce the labor of workers and improve work efficiency, and to polish while smoothly and accurately moving the polishing member in the direction of the tube axis. To provide a tube inner surface polishing device which can perform work reliably and can have a relatively compact structure as a whole.

In order to achieve the above object, the present invention provides a polishing device having the following configuration. That is, the polishing device of the present invention includes a traveling carriage 1 housed inside a pipe A to be polished, and a machine installed on the traveling carriage 1 and supported so as to be slidable in the axial direction of the pipe A with respect to the traveling carriage 1. It is equipped with a sliding body 4, an operating mechanism 5 capable of reciprocating the sliding body 4 in the above-mentioned direction, and an arm 52 movable in the radial direction of the tube A, and capable of pressing the arm 52 against the inner surface of the tube A. Therefore, a truck fixing mechanism 50 capable of fixing the traveling truck 1 to the pipe A is provided. Further, the sliding body 4 is provided with a revolving body 11 having a revolving body body 14 rotatably provided around a revolving shaft 13 and a swinging arm 16 rotatably attached to the revolving body body 14. The swing arm 16 is provided with a polishing member 31 that rotates around a drive shaft 32 . This abrasive member 31 is
It is rotated around the drive shaft 32 by the rotation mechanism 41 . In addition, the rotating body body 14 is connected to the rotating shaft 1.
A rotating mechanism 25 that rotates around the pivot arm 16, a member 17 on the swing arm 16 side, and a member 19 on the swing body main body 14 side, and a swing mechanism 25 that rotates the swing arm 16 outward from the neutral position. When the swing arm 16 is tilted inward, the abrasive member 31 is biased in a direction to press it against the inner surface of the tube A, and when the swing arm 16 is tilted inward, the abrasive member 31 is biased in a direction away from the inner surface of the tube A. It is equipped with a tension spring 20.

When polishing is performed using the polishing apparatus configured as described above, the traveling truck 1 is fixed by the truck fixing mechanism 50, and the sliding body 4 is moved in the tube axis direction by the operating mechanism 5. In this case, when the swing arm 16 is tilted outward, the polishing member 31 is pressed against the inner surface of the tube by the elasticity of the tension spring 20. Furthermore, when the swing arm 16 is tilted inward, the abrasive member 31 is held at a position away from the inner surface of the tube by the elasticity of the tension spring 20. It doesn't get in the way.

An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 is a running trolley, and this running trolley 1 is equipped with wheels 2 and 3 at the front and rear.
It is designed to be able to run inside the tube A to be polished.

A sliding body 4 is provided on the traveling carriage 1. This sliding body 4 can be slid in the front-rear direction, that is, in the axial direction of the pipe A, with respect to the traveling carriage 1 by means of an operating mechanism 5. In this embodiment, the operating mechanism 5 employs a screw feeding mechanism using a lead screw 6, and by rotating the lead screw 6 with a handle 7, the sliding body 4 can be moved. It is configured. 8 is a protective net.

Further, a rotating body support 10 is attached to the sliding body 4, and a rotating body 11 is rotatably supported by the rotating body support 10 in a direction around the axis of the tube A. This revolving body 11 includes a revolving shaft 13 supported by the revolving body support 10 by a bearing 12, a revolving body main body 14 fixed to the revolving shaft 13, and a revolving body main body 14 connected to the revolving body main body 14 by a pivot shaft 15. It is composed of a swing arm 16 that is rotatably attached to a shaft. A tension spring 20 is stretched between a pin 17 provided on the swing arm 16 and a pin 19 fixed to a member 18 on the pivot shaft 13 side. Therefore, as shown in Figure 5A and B,
The swing arm 16 is biased in either direction f ₁ or f ₂ depending on the rotational position of the swing arm 16 . Also, a shock absorber 2 for preventing rebound is provided approximately parallel to the tension spring 20.
1 is provided.

The rotating body 11 is rotated by a rotating mechanism 25. This turning mechanism 25
These include a revolving body driving motor 26 attached to the traveling truck 1, a driving sprocket 27 attached to the output shaft of this motor, a driven sprocket 28 fixed to the rotating shaft 13, and these sprockets 27, It is composed of a chain 29 stretched between 28 and the like. Therefore, if the motor 26 is rotated, its rotational force will be transferred to the sprocket 27→
It is transmitted from the chain 29 to the sprocket 28, and the pivot shaft 13 is rotated.

Further, a grinding wheel 31 as an example of a polishing member is provided on the swing arm 16 of the rotating body 11. A pulley 33 is attached to the drive shaft 32 of this grinding wheel 31.
is fixed, and a drive belt 35 is stretched across this pulley 33 and intermediate pulley 34. Note that the intermediate pulley 34 is connected to the pivot shaft 15.
It is installed coaxially with. The intermediate pulley 34 is interlocked with a driving pulley 37 via a belt 36. This driving pulley 37
is attached to a grinding wheel drive shaft 38 which is inserted concentrically into the inside of the pivot shaft 13. This grinding wheel drive shaft 38 is connected to the output shaft of a grinding wheel rotation motor 40 via a coupling 39. Therefore, when the motor 40 rotates, its rotational force is transmitted to the grinding wheel drive shaft 38, and each pulley 33, 34, 37
The drive shaft 32 is rotated via the belts 35 and 36, and the grinding wheel 31 is rotationally driven as a unit. That is, these motor 40 and pulley 33,
34, 37, belts 35, 36, drive shaft 32, etc., constitute a rotation mechanism 41 for rotating the grinding wheel 31.

Note that 45 in FIG. 3 is a first balancer, and this balancer 45 is connected to the grinding wheel 31 and the drive shaft 3.
2. It is designed to balance the weight of the pulley 33, etc. Further, a second balancer 46 (a first
(see figure) is attached to balance the weight of the revolving body 11 as a whole. Also, the second
In the figure, 47 indicates a switch box.

Further, a truck fixing mechanism 50 for fixing the traveling truck 1 to the pipe A is provided. This truck fixing mechanism 50 includes a pair of lower arms 51, 51 that support the lower side of the traveling truck 1, and an upper arm 52 that fixes the upper side of the traveling truck 1. The lower arms 51, 51 have pivots 53, 53, respectively.
The lower arms 51, 5 can be rotated in the _three directions of the arrow f in Fig. 2 about the center.
1 can support the bottom wall of the tube A in a mutually open state. On the other hand, the upper arm 52
adopts a screw feeding mechanism using a lead screw, and can be moved up and down by rotating the handle 54, and can approach and separate from the ceiling wall of the pipe A. 55 is the base of the arm.

The polishing device configured as described above is used to remove rust and other deposits from the inner surface of the tube, for example, when repairing the tube A from the inner surface.
First, the apparatus of this embodiment is placed in a pipe A, and is moved to a destination while running on wheels 2 and 3. At this time, the swinging arm 16 of the revolving body 11 is rotated and retracted to the position shown in FIG. 5B, that is, the position shown by the imaginary line p in FIG. Therefore, it is possible to prevent the grinding wheel 31 from coming into contact with the inner surface of the tube during travel.

Once it has been moved to the desired location, expand the lower arms 51, 51 and extend the upper arm 52 so that it is in close contact with the inner surface of the tube A, and align the center C of the pivot shaft 13 on the central axis of the tube A (see Figure 1). The traveling trolley 1 is fixed so that it is located. Further, the swing arm 16 is rotated in the direction shown in FIG. 5A, and the grinding wheel 31 is brought into sliding contact with the inner surface of the tube A by the elastic force of the tension spring 20.

Then, when the grinding wheel rotation motor 40 is driven to rotate the grinding wheel 31 and the turning motor 26 is driven, the turning shaft 13 is rotated, and the turning body 11 is driven.
rotates in the circumferential direction of tube A. Therefore, grinding wheel 3
1 revolves along the inner surface of the tube A while rotating on its own axis, and can polish the inner surface of the tube over its entire circumference. Furthermore, the grinding wheel 31 can be moved in the tube axis direction by rotating the handle 7 to rotate the lead screw 6 and moving the sliding body 4 in the tube axis direction.
A wide range can be polished in the axial direction of the tube while the traveling cart 1 is fixed to the tube A.

Moreover, since the grinding wheel 31 of the above embodiment is elastically pressed against the inner surface of the tube by the elastic force of the spring 20, even if there is some unevenness on the inner surface of the tube, it can be absorbed. Even if the grinding wheel 31 becomes smaller due to wear, it can always be pressed correctly against the inner surface of the tube with a predetermined pressure, so the grinding effect is excellent and the grinding wheel 31 has the advantage of being less frequently replaced due to grinding.

Moreover, when the grinding wheel 31 is not used for polishing, the grinding wheel 31 is
Since it can be retracted to a certain position, it does not get in the way of driving and can be moved smoothly.

Note that a wire brush, buff, or other abrasive member may be used instead of the grinding wheel 31, and in short, the most suitable abrasive member may be used depending on the degree of polishing, purpose, etc.

In addition, although this embodiment is constructed as described above, when implementing the present invention, the specific configurations and shapes of the traveling truck, revolving body, abrasive member, rotation mechanism, turning mechanism, etc. may be modified without departing from the gist of the present invention. Of course, the embodiments can be modified and implemented in various ways.

Since the present invention is constructed as described above, the abrasive member can rotate (rotate) in rotation and sliding contact with the inner surface of the tube, rotate (revolution) around the axis of the tube, and move in the axial direction of the tube. Therefore, the entire circumference of the inner surface of the tube can be polished automatically over a wide range.
Compared to conventional manual polishing, the labor required for polishing work can be significantly reduced, and the work can be done more efficiently in a short time, which is a great effect.

In addition, the polishing device of the present invention allows only the sliding body to slide in the tube axis direction with respect to the traveling carriage that can be fixed to the inner surface of the tube. ,
The polishing member can be accurately and smoothly advanced in the tube axis direction. The elasticity of the tension spring makes it possible to press the abrasive member against the inner surface of the pipe, and when not polishing, such as when moving a traveling cart, the same tension spring is used to hold the abrasive member against the moving trolley. It can be moved to a position where it will not cause friction. That is, this tension spring has both the function of pressing the polishing member against the inner surface of the tube and the function of separating it from the inner surface of the tube, so that it can contribute to simplifying and compacting the structure of the entire apparatus. When moving the device of the present invention, it can be quickly moved within a pipe using a cart.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the polishing device, Fig. 2 is a rear view, and Fig. 3 is a front view.
FIG. 4 is a sectional view of the revolving body part, and FIGS. 5A and 5B are schematic diagrams showing the operation of the swing arm. DESCRIPTION OF SYMBOLS 1... Traveling trolley, 5... Operating mechanism, 11... Swivel body, 25... Turning mechanism, 31... Grinding wheel (polishing member), 41... Rotating mechanism, A... Pipe.

Claims (1)

[Scope of utility model registration request] Traveling trolley 1 accommodated inside the pipe A to be polished
a sliding body 4 provided on the traveling carriage 1 and slidably supported in the axial direction of the pipe A with respect to the traveling carriage 1; an operating mechanism 5 capable of reciprocating the sliding body 4 in the above direction; The arm 52 is movable in the radial direction of the tube A.
By pressing the traveling trolley 1 against the inner surface of the pipe A
A rotating body body 14 is provided on the sliding body 4 so as to be rotatable about a pivot shaft 13, and a swing arm 16 is rotatably attached to the rotating body body 14. A revolving body 11,
The drive shaft 32 is attached to the swing arm 16 and
a polishing member 31 that rotates around a drive shaft 32; and a rotation mechanism 4 that rotates this polishing member 31 around a drive shaft 32.
1, a swing mechanism 25 for rotating the swing body body 14 around the swing shaft 13, and a swing arm 16.
The swing arm 1 is stretched between the member 17 on the side and the member 19 on the side of the rotating body 14, and the swing arm 1
When the swing arm 16 is tilted outward, the swinging arm 16 is biased in the direction of pressing the polishing member 31 against the inner surface of the tube A. When the swing arm 16 is tilted inward, the polishing member 31 is pushed against the inner surface of the tube A. A device for polishing the inner surface of a tube, comprising a tension spring 20 that urges the swing arm 16 in a direction away from the inner surface.