JPH07121482B2 - Pipe surface grinding equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe surface grinding apparatus for grinding a pipe surface, mainly a resin pipe surface, for welding a resin saddle or the like. And a holder that is rotatably mounted on the pipe by closing it in two parts that can be opened and closed.
An automatic tool for grinding a required width of a pipe surface by screwing a holder attached with a scraper for grinding a portion.

[0002]

2. Description of the Related Art In order to weld a saddle for a branch pipe to the surface of a pipe used for a gas pipe, a water pipe or the like, mainly to the surface of a resin pipe, the surface skin of the pipe must be prepared to be suitable for welding. Conventionally, a ring-shaped manual holder that allows the outer circumference of the pipe to be rotated manually was equipped with a scraper, and the mud and oxide film covering the pipe surface were cleaned by grinding. Since it needs to be welded to an arbitrary place on the surface and is often welded to a pipe such as a resin pipe buried in the ground, it is not suitable for manual work in a narrow hole dug from the ground.

[0003]

Whether it is a new resin pipe or a buried and soiled resin pipe,
Stable welding strength cannot be obtained unless the oxide film formed on the surface during manufacturing is scraped off. SUMMARY OF THE INVENTION It is an object of the present invention to solve the problem of developing a pipe surface grinding device that can be easily used without human power as long as it has an appropriate rotation control member such as an electric drill.

[0004]

The pipe surface grinding apparatus of the present invention meets the above-mentioned object and can be opened and closed freely.
It consists of a clamp that is split into two parts and is wound around the pipe to be fixed by closing, and a holder that is openable and closable and is rotatably attached to the pipe when it is closed. A pinion is fixed to the tip of the clamp. A screw rod that rotates with an appropriate rotation control member is screwed, a scraper that grinds a thin portion of the pipe surface and grinds the entire circumference by rotation with the holder, and a scraper that is attached over the entire circumference and meshes with the pinion. A pair of matching circular teeth are mounted, and the rotation of the screw rod is controlled by a rotation control member so that the holder is screwed on the outer periphery of the pipe following the screw pitch of the screw rod. It is a thing.

[0005]

Operation: As described in the examples below, the pipe P
On the other hand, the clamp 1 is non-rotatably fixed, the holder 2 is rotatably mounted, the scraper 34 is set so as to be thinly cut into the surface of the pipe P, and the screw rod 17 is provided with a rotation control member 20 such as an electric drill. Connect and rotate. The threaded rod 17 is one in which a screw is carved with a fine pitch, and this rotation causes the holder 2 to rotate via the pinion 18, the circular teeth 38, 39 of the large gear, etc., so that the scraper 34 rotates and the surface of the pipe P is rotated. At the same time as grinding, the screw rod 17 is screwed with respect to the clamp 1, so that the holder 2 and the scraper 34 are screwed on the surface of the pipe P in accordance with the pitch of the screw rod 17, and are ground to the width required for welding. Finish to a suitable width.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The attached drawings show an embodiment of the present invention. FIG. 1 is a partially cutaway side view of a state of use, FIG. 2 is a front view of the clamp 1 seen from the right side of FIG. 1, and FIG. The holder 2 is shown in FIG.
1 is a partially cutaway front view seen from the right side of FIG.
Is a partially cutaway front view seen from the left of FIG. 5, FIG. 5 is a plan view of the holder 2, and FIG. 6 is a front view of a split gear or the like mounted on the holder.

In FIG. 1, P is a resin pipe, 1 is a clamp that is non-rotatably wound around the outer periphery of the pipe P, and 2 is a holder that is rotatably mounted on the outer periphery of the pipe P. The clamp 1 is composed of an upper piece 3 and a lower piece 4 as shown in FIG.
A screw rod in which one end of each of the pieces 3 and 4 is openably and closably connected by shafts 6 and 7 at both ends of a link 5, and a protrusion piece 4a provided at the other end of the lower piece 4 is rotatable by a shaft 8. 9 and screw rod 9
The tightening nut 10 is screwed on. The projecting piece 3a projecting from the other end of the upper piece 3 is provided with a groove 11 through which the screw rod 9 is inserted. The upper piece 3 is provided with a protruding piece 12 projecting upward, and the spring 1
An arc-shaped partial female screw 15 is provided in front of the shaft of the lever 13 pushed by the lever 4, and a slot 16 having the lever 13 and the spring 14 therein is formed. The lever 13 is provided with a handle 13a protruding outside the slot 16.

The clamp 1 is opened by the shafts 6 and 7 of the link 5 as shown by the chain line in FIG. Further, as shown by the solid line in FIG. 2, the upper piece 3 and the lower piece 4 are wound around the tightening pipe P by the tightening nut 10.

Reference numeral 17 denotes a screw rod having a pinion 18 fixed to one end thereof. The screw rod 17 is passed through the groove hole 16 and the partial female screw 15 of the lever 13 is elastically contacted with the spring 14 for screwing. The screw rod 17 is provided with a circular end surface 19 for fitting a main shaft of an electric drill or the like into a rotation control member. When the rotation control member 20 is an electric drill spindle, the circular end face 1 is used.
The standard of No. 9 is the same as that of the circular end surface of the drill fitted in the chuck of the main shaft.

The holder 2 has a large diameter portion 2 as shown in FIG.
1 and a small-diameter portion 22 which are divided into an upper piece 23 and a lower piece 24. The upper piece 23 and the lower piece 2
Arms 26 and 27 protruding from one side of each small diameter portion 21 of No. 4
3 are connected by a shaft 28 so that they can be opened and closed as shown by a chain line and a solid line in FIG. 3, and a protrusion 24a protruding from the other end of the small diameter portion 22 of the lower piece 24 is rotated by a shaft 25. 29, and a tightening nut 3 screwed to the screw rod 29
0 is provided, and a groove 31 through which the screw rod 29 is inserted is formed in a protruding piece 23a protruding from the other end of the small diameter portion 22 of the upper piece 23.

The holder 2 has a small-diameter portion 2 of an upper piece 23.
2 is a direction of a straight line and tangential to the pipe P is a straight cutout 32, and a blade-shaped scraper 34 having a small blade width is inclined to the surface of the pipe P and slightly contacts the surface. The support piece 33 so that the support piece 33 is notched 3
It is attached to one side of No. 2 with the attaching screw 35. Scraper 3
The blade mouth piece 36 is made to face 4 and is attached to the other side of the cutout portion 32 by a mounting screw 37. In addition, the pinion 18 is inserted into the large-diameter portion 21, and the circular teeth 38 and 39 that are split in half and mesh with the pinion 18 are fitted to the upper piece 23 and the lower piece 24,
The end plates 42 and 43 that prevent the pinion 18 from moving in the escape direction are fixed to the upper piece 23 and the lower piece 24 of the large diameter portion 21 with screws. Rolls 40 and 40 are in contact with the pipe P together with the scraper 34.

The holder 2 is opened by the shaft 28 as shown by the chain line in FIG. 3 to engage with and disengage from the pipe P.
Is closed and tightened with a tightening nut 30 so as to be rotatably mounted on the pipe P, the holder 2 is connected with a screw rod 17, and a circular tooth 38 composed of a large gear,
39 and the end plates 42 and 43 are circularly connected.

[0013]

According to the present invention, the holder 1 is divided into two parts which can be opened and closed, and the clamp 1 which is wound and fixed to the pipe P by closing and the two parts which can be opened and closed and which is rotatably mounted on the pipe P by being closed. 2, a pinion 18 is fixed to the tip of the clamp 1, and a screw rod 17 that is rotated by an appropriate rotation control member 20 is screwed into the clamp 1, and one portion of the surface of the pipe P is thinly attached to the holder 2. The scraper 34, which grinds and rotates the entire circumference by rotation, and the circular teeth 38 and 39, which are mounted on the entire circumference and which mesh with the pinion 18 and which are made up of two large gears, are mounted to rotate the screw rod 17. Is controlled by the rotation control member 20 to move the holder 2 around the pipe P along the screw pitch of the screw rod 17 so that the holder 2 can be fixed to the clamp 1 and fixed. The rotatably mounting of the dar 2 on the pipe P is easy because the clamp 1 and the holder 2 and the circular teeth 38 and 39 can be split into two, respectively. In order to proceed, the screw rod 17 connecting the clamp 1 and the holder 2 is implemented by the rotation control member 20 such as an electric drill with almost no labor, and the implementation is dug down from the ground to expose the underground resin pipe P. It can be performed even in a narrow work hole, and has the effect of automating the removal of the pipe oxide film for welding the saddle, etc., or the adhering mud and oxide film by grinding.

[Brief description of drawings]

 The accompanying drawings show an embodiment of the present invention.

1] Partially cutaway side view in use

FIG. 2 is a front view of the clamp 1 seen from the right side of FIG.

FIG. 3 is a partially cutaway front view of the holder 2 seen from the right side of FIG. 1.

FIG. 4 is a partially cutaway front view of the holder 2 as seen from the left in FIG.

FIG. 5 is a plan view of the holder 2.

[FIG. 6] Circular teeth 38, 3 divided into two to be attached to the holder
Front view of 9

[Explanation of symbols]

P pipe, 1 clamp, 2 holders, 3
Upper piece, 3a protruding piece, 4 Lower piece, 4a protruding piece, 5
Link, 6, 7, 8 axis, 9 screw rod, 10 tightening nut, 11 groove, 12 protruding piece, 13 lever, 13a handle, 14 spring, 15 partial female thread, 16 groove hole, 17 screw rod, 18 pinion, 19 Circular end face, 20 rotation control member, 21
Large diameter part, 22 small diameter part, 23 upper piece, 23a protruding piece, 24 lower piece, 24a protruding piece, 25, 26, 2
7 arms, 28 shafts, 29 screw rods, 30 tightening nuts, 31 notches, 32 notches, 33 support pieces,
34 scraper, 35 mounting screw, 36 blade piece, 37 mounting screw, 38, 39 circular tooth, 40
Roll, 42, 43 End plate

Claims (1)

[Claims] 1. A clamp comprising an openable / closable two-piece clamp that is fixed to a pipe by closing it, and a openable / closable holder that is rotatably attached to the pipe by closing the clamp. A pinion is fixed to the tip of the pipe, and a screw rod rotated by an appropriate rotation control member is screwed into the holder.
A scraper that grinds a thin portion and grinds the entire circumference by rotation, and a two-part circular tooth that is attached over the entire circumference and meshes with the pinion are attached, and the rotation of the screw rod is controlled by a rotation control member. A pipe surface grinding apparatus, characterized in that the holder is screwed along the outer periphery of the pipe following the screw pitch of the screw rod.