JP7437587B2 - Burring device and burring method - Google Patents

Description

The present disclosure relates to a burring device and a burring method.

BACKGROUND ART Conventionally, a technique (burring) is known in which a structure is pulled out of a hole drilled in a tube such as a metal tube to raise up the end of the hole. Regarding a burring device that performs such burring, for example, Patent Document 1 discloses that the burring device includes a steel ball, a mold that comes into close contact with a pipe (metal pipe), and a traction device provided above the mold. , A traction tool hanging down from a traction device is locked to a steel ball placed directly below the hole in the pipe, the traction tool is raised to pull up the steel ball, and the steel ball is forcibly pulled out of the pipe. , it is disclosed that a flange that stands up with a gently curved surface is formed around the position where the hole was provided.

Japanese Patent Application Publication No. 8-20674

However, in the configuration disclosed in Patent Document 1, in order to perform burring at a desired position of the pipe (the part where the hole is made), the burring device must be brought close to or separated from the pipe (proximity, etc.), or the pipe must be burred. It is necessary to place it close to the equipment. If the burring device is to be placed close to the pipe, it is necessary to lift and move the burring device using a crane or the like, which is troublesome, takes time, costs, and the like. On the other hand, when moving a tube close to a burring device, for example, depending on the size and length of the tube, it may be difficult to move the tube.

The present disclosure is a technology completed based on the above circumstances, and aims to facilitate burring.

The present disclosure includes: a base capable of holding a tube provided with a hole; an upper portion disposed above the base; and a first displacement mechanism that vertically displaces the upper portion relative to the base. , an extension part extending downward from the upper part, a pull-out part that is removable from the extension part and has a diameter larger than the hole part, and a pull-out part arranged below the base part and capable of moving the base part. wheels, wherein the pull-out section is attached to the extension section from inside the tube through the hole section, the base section presses the tube, and the first displacement mechanism moves the upper section relative to the base section. The burring device is configured such that the pull-out portion can be pulled out from the hole when the burring device is displaced upward.

According to such a burring device, by pulling out the pull-out portion having a larger diameter than the hole portion from the hole portion, the end portion of the hole portion can be raised in the pulling direction to perform burring. In addition, since the burring device is equipped with wheels that allow the base to be moved, in order to attach the extension part to the extension part of the extraction part, for example, the extension part is positioned above the extraction part arranged below the hole part. In this manner, the base can be smoothly brought close to the tube by rotating the wheel. Moreover, after the extraction part is pulled out from the hole, the base part can be smoothly moved away from the tube by rotating the wheels. Thereby, the base can be brought close to and separated from the pipe without using a crane or the like, and burring can be easily performed.

The burring device may include a second displacement mechanism that vertically displaces the base relative to the wheel based on displacement of the upper portion by the first displacement mechanism.

According to such a burring device, the power related to the first displacement mechanism for pulling out the extraction part from the hole can be used for the second displacement mechanism for displacing the relative vertical position of the base with respect to the wheel. Thereby, it is possible to provide a burring device that can be made more compact and can move more smoothly and can realize cost savings.

The burring device includes a leg portion to which the wheel is attached, a second displacement mechanism that vertically displaces the base portion relative to the leg portion based on displacement of the upper portion by the first displacement mechanism; The second displacement mechanism includes a lever portion and a wire connectable to the lever portion and the upper portion, and the lever portion is connectable to a fulcrum portion connected to the leg portion and the wire. and a point of action connected to the base.

According to such a burring device, the power of the first displacement mechanism can be easily switched to be transmitted to the second displacement mechanism by connecting the wire to the lever part and the upper part. Further, when a force is applied from the upper part to the force point part through the wire, the force can be effectively transmitted to the action point part using the fulcrum part as a fulcrum. Thereby, the base can be smoothly displaced up and down with respect to the legs.

In the above configuration, the base portion may include an opening located below the extension portion, and the force point portion may be located closer to the opening than the fulcrum portion and the action point portion. According to such a configuration, the power of the first displacement mechanism can be effectively transmitted to the second displacement mechanism, and a practical burring device can be provided.

In the above configuration, the action point portion may be located closer to the opening than the fulcrum portion. According to such a burring device, the power of the first displacement mechanism can be transmitted to the second displacement mechanism more effectively, and a more practical burring device can be provided.

In the above configuration, the second displacement mechanism may include at least one pair of the lever parts, and the wire may have a central part connected to the upper part and both end parts connectable to the pair of lever parts. good. According to such a burring device, the power of the first displacement mechanism can be equally transmitted to the pair of levers via one wire, and a more practical burring device can be provided.

The burring device includes a leg portion to which the wheel is attached, a second displacement mechanism that vertically displaces the base portion relative to the leg portion based on displacement of the upper portion by the first displacement mechanism; It may also include a fixing part that can fix the position of the base with respect to the leg. According to such a burring device, the position of the base displaced by the second displacement mechanism can be fixed by the fixing part, so there is no need to continue generating power from the first displacement mechanism to fix the position of the base. , is suitable.

In the above configuration, a connecting pin may be inserted into the pull-out part and the extension part, so that the pull-out part is attached to the extension part through the hole. According to such a burring device, the extraction portion and the extension portion can be smoothly attached and detached using the connecting pin, which is preferable.

The present disclosure also provides a base that can make a hole in a tube and hold the tube, an upper portion disposed above the base, and a base portion that is capable of vertically displacing the upper portion relative to the base. 1 a displacement mechanism, an extension part extending downward from the upper part, a pull-out part that is attachable to and detachable from the extension part and has a larger diameter than the hole part, and the base part disposed below the base part; a burring device is prepared, comprising: wheels that allow movement of the burring device; the pulling section is placed inside the tube so as to be located below the hole, and the extension section is located above the hole. move the base part as shown in FIG. This is a burring method in which the pull-out part is pulled out from the hole by displacing it upward.

According to such a burring method, by pulling out the pull-out part having a larger diameter than the hole part from the hole part, the end of the hole part can be raised in the pulling direction, and burring can be performed. Furthermore, the wheels that allow the base to move allow the base to be smoothly moved toward and away from the pipe, making it possible to easily perform burring without using a crane or the like to move the base.

According to the present disclosure, it becomes possible to perform burring easily.

An explanatory diagram showing a burring device and a metal pipe according to an embodiment Front view of main unit View of the main unit from the left View of the main unit from above Front view showing the main unit moved to the left side of the metal tube Front view showing the cylinder extended with the wire attached Front view showing the main unit moved so that the base is located on the metal tube Front view showing the cylinder retracted A front view showing a state in which the wire is removed and the pull-out part is connected to the extension part via the connection part. Front view showing how the cylinder is extended and the hole is raised An enlarged sectional view showing how the pull-out part is pulled out and the end of the hole rises up. Front view showing the main unit separated from the metal tube

<Embodiment>
Embodiments of the present disclosure will be described with reference to FIGS. 1 to 12. In this embodiment, the burring device 1 raises the end 7A1 (see FIG. 11) of the hole 7A upward (performs burring) by pulling out the pull-out portion 67 from the hole 7A provided in the metal tube 7. I will explain about it. In each figure, arrow direction F is forward (front side), arrow direction B is backward (back side), arrow direction U is upward, arrow direction B is downward, arrow direction L is leftward, and arrow direction R is rightward. Explain. In addition, in FIG. 1, the main body unit 2 of the burring device 1 is shown in a rear view seen from the rear, and the pump unit 3 is shown in a perspective view seen from above (the arrow direction corresponds to the direction of the main body unit 2). are doing). In the figures after FIG. 2, illustration of the pump unit 3 of the burring device 1 is omitted. The metal tube 7 is assumed to have a cylindrical shape extending in the left-right direction when viewed from the front.

As shown in FIG. 1, the burring device 1 includes a main unit 2 and a pump unit (hydraulic unit) 3 connected to the main unit 2 via two hydraulic hoses 4. The pump unit 3 includes a pump body 80 that pressurizes oil, a plurality of wheels 81 attached to the lower side of the pump body 80, a control section 82 attached to the upper side of the pump body 80, and a plurality of wheels 81 extending from the control section 82. A hand-operated button 83 is provided. The pump unit 3 is movable on the floor G together with the main body unit 2 by rotation of the plurality of wheels 81. The pump main body 80 is capable of sending pressurized oil to (or returning from the cylinder 40) the cylinder (first displacement mechanism) 40 of the main body unit 2 via the hydraulic hose 4. The control unit 82 can control the expansion and contraction of the cylinder 40 by changing the pressure of oil sent from the pump body 80 to the body unit 2 based on the operation of the hand-operated button 83 by the operator.

As shown in FIGS. 1 to 4, the main body unit 2 includes a base 10 having a plate-shaped main body 10A whose plate surface as a whole extends in the left-right and front-back directions, and an upper part 30 disposed above the main body 10A. , two cylinders 40 arranged between the main body part 10A and the upper part 30. Further, the main body unit 2 includes four wheels 70 disposed below the main body 10A, and four legs 71 to which each of the four wheels 70 is attached. The four wheels 70 make it possible to move the base 10 in the left-right and front-back directions by rotating while contacting the floor surface G.

As shown in FIG. 4, the base portion 10 is located below an extension portion 60, which will be described later, and has an opening 11 in the shape of a circular hole penetrating vertically in the center portion of the main body portion 10A in the front-rear direction and left-right direction. , a long plate-shaped hydraulic connection portion 12 that is disposed behind the opening 11 and rises from the upper surface of the main body portion 10A. The diameter of the circular hole of the opening 11 is larger than the diameter of the cylindrical part 67B (see FIG. 10) of the pull-out part 67, and is large enough for the pull-out part 67 to pass through. As shown in FIGS. 1 and 4, two hydraulic hoses 4 extending from the pump body 80 and four hydraulic hoses 5 connected to two cylinders 40 each are attached to the hydraulic connection part 12. There is. The hydraulic hose 5 is capable of sending oil sent from the pump body 80 via the hydraulic hose 4 to the cylinder 40 and returning the oil sent to the cylinder 40 to the pump body 80 via the hydraulic hose 4. can.

As shown in FIGS. 2 to 4, the base 10 includes four cylindrical portions 16 extending downward from the back (lower surface) sides of the four corner portions 10A1, 10A2, 10A3, and 10A4 of the main body portion 10A. , two holding parts 14 attached to the left and right sides of the opening 11 on the back side of the main body 10A, and legs 71 that hang down from the four corners 10A1, 10A2, 10A3, and 10A4 of the main body 10A, respectively. It includes four lock pins (fixing parts) 15 that can fix the position of the base 10 relative to the base part 10. A part of the leg part 71 is inserted into the cylindrical part 16, and the position of the cylindrical part 16 can be moved up and down with respect to the leg part 71. Thereby, the base 10 can be vertically displaced relative to the wheels 70 and the legs 71. The cylindrical portion 16 is provided with one hole 16A on its side surface. The leg portion 71 is provided with a plurality of holes 71A arranged vertically on its side surface.

When the lock pin 15 is inserted into only one of the plurality of holes 71A of the leg portion 71, the lower end portion 16B of the cylindrical portion 16 is caught on the inserted lock pin 15 (see FIGS. (See Figure 3). Thereby, the main unit 2 fixes (maintains) the height (relative position in the vertical direction) of the base 10 with respect to the leg 71, while the leg 71 and the wheels 70 move in the vertical direction of the cylindrical part 16. It becomes rotatable around the extending axis. On the other hand, when the lock pin 15 is inserted into both the hole 16A of the cylindrical part 16 and any one of the plurality of holes 71A of the leg part 71, the main body unit 2 While the height of the base portion 10 is fixed (maintained), the leg portions 71 and the wheels 70 become unrotatable around the axis extending in the vertical direction of the cylindrical portion 16. Note that in any of the above states, the wheels 70 can rotate with the rotation axis in the front-rear direction, so the main unit 2 can move at least in the left-right direction.

As shown in FIG. 3, the holding portion 14 includes a recessed portion 14A having a half-moon-shaped lower portion. The holding part 14 is prepared in a plurality of types with different sizes of the recessed part 14A, and is provided with an arbitrary shape with respect to the main body part 10A so that the recessed part 14A fits into the side surface of the desired metal tube 7 to be burred. The holding portion 14 of different types can be attached and detached. As shown in FIG. 8 etc., the height of the base 10 is adjusted by a second displacement mechanism 50, which will be described later, and the metal tube 7 is moved by fitting the recess 14A of the holding portion 14 into the metal tube 7. can be held down from above by the holding part 14.

As shown in FIGS. 2 and 3, the cylinder 40 is a hydraulic cylinder that can be expanded and contracted up and down by the pressure of oil sent from the pump body 80, and the upper part 30 is moved relative to the base 10 (main body 10A). It is possible to displace it up and down. A total of two cylinders 40 are disposed, one on each side of the left and right sides of the opening 11 (see FIG. 4), and each has a cylindrical shape extending vertically. The cylinder 40 has a lower end 40A attached to the main body 10A, and an upper end 40B attached to the upper part 30. When the cylinder 40 extends in the vertical direction, the space between the base 10 and the upper part 30 widens, and the upper part 30 is displaced upward with respect to the base 10 (see FIGS. 2 and 3, etc.). On the other hand, when the cylinder 40 contracts in the vertical direction, the space between the base 10 and the upper part 30 narrows, and the upper part 30 is displaced downward with respect to the base 10 (see FIG. 8, etc.).

As shown in FIGS. 2 to 4, the upper portion 30 has a prismatic shape with long sides extending in the left-right direction. The upper part 30 includes two annular bodies 31 attached to its upper surface side. The main unit 2 also includes an extension part 60 extending downward from the lower surface of the upper part 30, and a pull-out part (pull-out ball) that can be attached to and detached from the lower part of the extension part 60 via a connection part 68 and a connection pin 69. 67. The extension part 60 is located between the two cylinders 40, and its upper part is a rod-shaped body extending in the vertical direction, and its lower part is a square-shaped structure. The extension portion 60 includes a connecting hole portion 60A in its lower portion, in which a circular hole through which a connecting pin 69 (described later) can be inserted is formed.

As shown in FIGS. 9 to 11, the pull-out portion 67 includes a tapered portion 67A whose diameter (diameter in the horizontal direction) becomes wider as it goes downward, and a cylindrical columnar portion 67B located below the tapered portion 67A. , is provided. The lower part of the tapered part 67A and the cylindrical part 67B have a diameter larger than that of the hole 7A pre-drilled in the metal tube 7. A hole-shaped screwed portion having a groove into which the connecting portion 68 is screwed is provided on the upper surface side of the tapered portion 67A.

As shown in FIGS. 2 to 4, the main unit 2 includes two second displacement mechanisms 50 that vertically displace the base 10 relative to the legs 71 based on the displacement of the upper part 30 by the cylinder 40. . The two second displacement mechanisms 50 include four levers 52 and two wires 51 that can connect two of the four levers 52 arranged in the front and back (a pair of levers 52) to the upper part 30. , is provided. As shown in FIG. 4, the four lever portions 52 are respectively disposed between the opening portion 11 and the four corner portions 10A1, 10A2, 10A3, and 10A4 of the main body portion 10A, and are symmetrical with respect to each other. It is set up in a certain way.

The wire 51 is a metal string-like body, and its central part 51B is connected by being caught in a groove (not shown) provided on the upper surface of the upper part 30, and its both ends 51A are connected to a pair of lever parts 52. , 52, and can be connected. The wire 51 is provided on the upper surface of the upper part 30 so that the center part 51B is located between the extension part 60 and the cylinder 40 when viewed from above, and both end parts 51A are located on the ends of the opening part 11. It is caught in the groove where it is cut.

As shown in FIGS. 2 to 4, the lever portion 52 includes a rod-shaped rod portion 54 and a hook portion 53 that is rotatably attached to the rod portion 54 and can be connected by hooking both ends 51A of the wire 51. , is provided. The rod portion 54 includes a fulcrum portion 57 connected to a protruding portion 71B of the leg portion 71 that extends above the main body portion 10A, and an action point portion connected to the upright portion 13 rising upward from the upper surface of the main body portion 10A. 56, and a force point portion 55 connectable to both ends 51A of the wire 51 via the hook portion 53. The action point portion 56 is located closer to the opening 11 than the fulcrum portion 57 is. The force point portion 55 is located closer to the opening 11 than the fulcrum portion 57 and the action point portion 56 . In the lever portion 52, the action point portion 56 and the force point portion 55 (on the opening 11 side) are vertically rotatable about a fulcrum portion 57 as a rotation axis. When the force point part 55 is displaced upward about the fulcrum part 57, the action point part 56 is also displaced upward, and the base part 10 is raised. When the force point part 55 is displaced downward about the fulcrum part 57, the action point part 56 is also displaced downward, and the base part 10 is lowered.

Next, a burring method for burring the metal tube 7 using the burring device 1 will be described. In the following description, the main unit 2 of the burring device 1 will be mainly described. It is assumed that the pump unit 3 has been moved so as to be located near the main unit 2. As shown in FIG. 5, first, a hole 7A is made at a desired position in the side wall of the metal tube 7. The method for making the hole 7A is not particularly limited, and can be performed by, for example, plasma cutting, gas cutting, laser cutting, or the like. The shape of the hole portion 7A may be such that it has at least a portion with a smaller diameter than the maximum diameter of the pull-out portion 67 (the diameter of the cylindrical portion 67B), for example, it may be circular when viewed from above, or the long side may be in the left-right direction. It may be elliptical or the like. Next, the restrictor 6 is placed on the floor surface G, and the metal tube 7 is placed on the restrictor 6 so that the hole 7A faces upward. The restrictor 6 has a concave upper surface and is a member that restricts the metal tube 7 from rolling or otherwise moving on the floor surface G. Subsequently, the pull-out portion 67 is inserted into the metal tube 7 from the left end (or right end) so as to be located below the hole portion 7A.

Next, the burring device 1 is prepared, and the main unit 2 is moved to the side (left side) of the metal tube 7. Then, the upper part 30 and the lever part 52 are connected by a wire 51 to create an interlocking state in which the expansion and contraction of the cylinder 40 and the displacement of the base part 10 by the second displacement mechanism 50 are linked. At this time, the lock pin 15 is removed from the hole 16A of the cylindrical portion 16 and the plurality of holes 71A of the leg portion 71, and left hanging from the main body portion 10A in an unfixed state. As shown in FIG. 5, when the recess 14A of the holding part 14 is lower than the upper surface of the metal tube 7, the cylinder 40 is extended in the vertical direction to displace the upper part 30 upward. Then, as shown in FIG. 6, as the upper part 30 is displaced upward, the wire 51 lifts up the force point part 55 via the hook part 53, and the rod part 54 rotates upward about the fulcrum part 57, The base 10 is displaced upward relative to the legs 71. Then, the cylinder 40 is extended in the vertical direction until the concave portion 14A of the holding portion 14 is higher than the upper surface of the metal tube 7. After that, the lock pin 15 was inserted into the hole 71A located directly below the lower end 16B of the cylindrical part 16 among the plurality of holes 71A of the leg 71 (or the hole 16A of the cylindrical part 16 and the leg 71 so as to communicate with the hole 71A).

Subsequently, as shown in FIG. 7, by moving the main unit 2 to the right, the base 10 is moved so that the extension part 60 is located above the hole part 7A. Then, the connecting portion 68 is inserted into the hole 7A from above, and the connecting portion 68 is attached to the threaded portion provided on the upper surface side of the tapered portion 67A of the pull-out portion 67 inside the metal tube 7. .

Next, as shown in FIG. 8, the lock pin 15 is brought into a non-fixed state, the cylinder 40 is contracted up and down, and the upper part 30 is displaced downward. Then, as the upper part 30 is displaced downward, the wire 51 lowers the force point part 55 via the hook part 53 of the lever part 52, the rod part 54 rotates downward about the fulcrum part 57, and the base part 10 is displaced downward relative to the leg portion 71. Then, the concave portion 14A of the holding portion 14 comes into contact with the side wall of the metal tube 7 from above, so that the base portion 10 presses the metal tube 7 from above. This restricts upward movement of the metal tube 7.

Next, the operator lifts up the connecting part 68 and the pull-out part 67, and as shown in FIG. By inserting the pull-out portion 67 through the connecting portion 68, the pull-out portion 67 becomes attached to the extension portion 60. At this time, the pull-out portion 67 is attached from the inside of the metal tube 7 through the hole 7A to the extension portion 60 located outside the metal tube 7 via the connecting portion 68. At this time, the wire 51 is removed from the upper part 30 and the hook part 53, and the expansion and contraction of the cylinder 40 and the displacement of the base part 10 by the second displacement mechanism 50 are in a non-interlocked state, and then the cylinder 40 is expanded and contracted. By doing so, the connecting portion 68 may be inserted through the pull-out portion 67 and the extending portion 60 while adjusting the position of the extending portion 60 up and down. Note that the connecting portion 68 and the pull-out portion 67 may be lifted by attaching an auxiliary wire (not shown) extending from the extending portion 60 to the connecting portion 68 and contracting the cylinder 40. Further, after lifting the connecting part 68 and the pull-out part 67, an auxiliary tool, which is a U-shaped plate member, is inserted into the connecting part 68 from the side outside the metal tube 7, and the auxiliary tool is inserted into the hole 7A. The positions of the connecting portion 68 and the pull-out portion 67 may be temporarily held in a hanging manner, and then the connecting portion 68 may be inserted through the pull-out portion 67 and the extension portion 60.

Next, as shown in FIG. 10, in a non-interlocked state where the cylinder 40 and the second displacement mechanism 50 are not interlocked, the cylinder 40 is extended vertically to displace the upper part 30 upward with respect to the base 10, Pull out the pull-out portion 67 upward from the hole portion 7A. Then, as the tapered part 67A of the pull-out part 67 slides on the end 7A1 of the hole 7A, the diameter of the hole 7A expands, and as shown in FIG. 11, the end 7A1 rises upward. becomes. By joining a tube different from the metal tube 7 by welding or the like to the raised end portion 7A1, a branching process can be performed in which the metal side tube 7 is branched. As a result, the metal tube 7 can be branched without using, for example, a T-shaped branch tube, so the number of joints can be reduced and the metal tube 7 can be branched quickly.

After that, the upper part 30 and the lever part 52 are connected with the wire 51, and the expansion and contraction of the cylinder 40 and the displacement of the base part 10 by the second displacement mechanism 50 are linked, and the cylinder 40 is extended up and down, and the upper part 30 and the base part 10 are connected. is displaced upwardly relative to the leg portion 71. Then, after the concave portion 14A of the holding portion 14 is displaced above the end portion 7A1 of the metal tube 7, the main unit 2 is moved to the side (left side) of the metal tube 7 (see FIG. 12). At this time, the main unit 2 may be moved with the lock pin 15 in a fixed state.

Next, the effects of this embodiment will be explained. In this embodiment, a base 10 capable of holding a metal tube 7 provided with a hole 7A, an upper part 30 disposed above the base 10, and an upper part 30 that is vertically displaced relative to the base 10. a cylinder 40 that extends downward from the upper part 30; a pull-out part 67 that is removable from the extension part 60 and has a larger diameter than the hole part 7A; Wheels 70 that allow the base 10 to move The burring device 1 is shown having a configuration in which the pull-out portion 67 can be pulled out from the hole portion 7A when the burring device 30 is displaced upward with respect to the base portion 10.

According to such a burring device 1, by pulling out the pull-out portion 67, which has a larger diameter than the hole portion 7A, from the hole portion 7A, the end of the hole portion 7A is raised in the pulling direction (upward) to perform burring. be able to. Furthermore, since the burring device 1 is equipped with wheels 70 that allow the base 10 to be moved, in order to attach the pull-out portion 67 to the extension portion 60, for example, the pull-out portion 67 disposed below the hole portion 7A can be attached to the extension portion 60. By rotating the wheels 70, the base 10 can be smoothly brought close to the metal tube 7 so that the extension part 60 is located above. Further, after the pull-out portion 67 is pulled out from the hole portion 7A, the base portion 10 can be smoothly moved away from the metal tube 7 by rotating the wheels 70. Thereby, the base 10 can be brought close to and separated from the metal tube 7 without using a crane or the like, and burring can be easily performed.

The burring device 1 includes a second displacement mechanism 50 that vertically displaces the base 10 relative to the wheels 70 based on the displacement of the upper portion 30 by the cylinder 40.

According to such a burring device 1, the power related to the cylinder 40 for pulling out the extraction part 67 from the hole part 7A is also used for the second displacement mechanism 50 that displaces the vertical position of the base part 10 relative to the wheel 70. be able to. Thereby, it is possible to provide the burring device 1 which can be made compact and move more smoothly and can realize cost savings.

The burring device 1 includes a leg portion 71 to which a wheel 70 is attached, and a second displacement mechanism 50 that vertically displaces the base portion 10 relative to the leg portion 71 based on the displacement of the upper portion 30 by the cylinder 40. , the second displacement mechanism 50 includes a lever part 52 and a wire 51 that can connect the lever part 52 and the upper part 30, and the lever part 52 has a fulcrum part 57 connected to the leg part 71 and It includes a connectable force point part 55 and an action point part 56 connected to the base 10.

According to such a burring device 1, by connecting the wire 51 to the lever portion 52 and the upper portion 30, switching to transmit the power of the cylinder 40 to the second displacement mechanism 50 can be facilitated. Further, when a force is applied from the upper part 30 to the force point part 55 via the wire 51, the force can be effectively transmitted to the action point part 56 using the fulcrum part 57 as a fulcrum. Thereby, the base portion 10 can be smoothly displaced up and down with respect to the leg portions 71.

The base portion 10 includes an opening portion 11 located below the extension portion 60 , and the force point portion 55 is located closer to the opening portion 11 than the fulcrum portion 57 and the action point portion 56 . According to such a configuration, the power of the cylinder 40 can be effectively transmitted to the second displacement mechanism 50, and a practical burring device 1 can be provided.

The action point portion 56 is located closer to the opening 11 than the fulcrum portion 57 is. According to such a burring device 1, the power of the cylinder 40 can be transmitted to the second displacement mechanism 50 more effectively, and a more practical burring device 1 can be provided.

The second displacement mechanism 50 includes a pair of lever portions 52, and the wire 51 has a central portion 51B connected to the upper portion 30 and both end portions 51A connectable to the pair of lever portions 52, respectively. According to such a burring device 1, the power of the cylinder 40 can be equally transmitted to the pair of lever portions 52 via one wire 51, and a more practical burring device 1 can be provided.

The burring device 1 includes a leg portion 71 to which a wheel 70 is attached, a second displacement mechanism 50 that vertically displaces the base portion 10 relative to the leg portion 71 based on displacement of the upper portion 30 by the cylinder 40, and a leg portion 71. A lock pin 15 that can fix the position of the base 10 with respect to the portion 71 is provided. According to such a burring device 1, the position of the base 10 displaced by the second displacement mechanism 50 can be fixed by the lock pin 15, so that the position of the base 10 can be fixed by continuing to generate power from the cylinder 40. This is not necessary and is preferable.

By inserting the connecting pin 69 into the pull-out portion 67 and the extension portion 60, the pull-out portion 67 is attached to the extension portion 60 through the hole portion 7A. According to such a burring device 1, the extraction portion 67 and the extension portion 60 can be smoothly attached and detached using the connecting pin 69, which is preferable.

In addition, in this embodiment, a hole 7A is made in the metal tube 7, a base 10 that can hold the metal tube 7, an upper part 30 disposed above the base 10, and an upper part 30 relative to the base 10. a cylinder 40 that can be vertically displaced vertically, an extending portion 60 extending downward from the upper portion 30, a pull-out portion 67 that is removable from the extending portion 60 and has a larger diameter than the hole 7A, and a base portion 10. A burring device 1 is prepared, which includes wheels 70 arranged below the base 10 to make the base 10 movable, and the extraction part 67 is placed inside the metal tube 7 so as to be located below the hole 7A, and the extension part 60 is positioned above the hole 7A, the pull-out part 67 is attached to the extension part 60 from inside the metal tube 7 through the hole 7A, the metal tube 7 is held down by the base 10, and the cylinder is closed. A burring method is shown in which the pull-out part 67 is pulled out from the hole part 7A by displacing the upper part 30 upwardly with respect to the base part 10 by using the screw 40.

According to such a burring method, by pulling out the pull-out part 67, which has a larger diameter than the hole part 7A, from the hole part 7A, the end of the hole part 7A can be raised in the pulling direction, and burring can be performed. Furthermore, the wheels 70 that allow the base 10 to be moved allow the base 10 to be smoothly moved toward and away from the metal tube 7, and there is no need to use a crane or the like to move the base 10, making it easy to burr. can.

<Other embodiments>
The present disclosure is not limited to the embodiments described above and illustrated in the drawings; for example, the following embodiments are also included within the technical scope of the present disclosure, and various modifications other than those described below may be made without departing from the spirit of the disclosure. It can be implemented by

(1) The mounting structure of the pull-out part and the extension part can be changed as appropriate. In the above embodiment, the pull-out part and the extension part are attached via the connecting part, but the present invention is not limited to this. For example, the pull-out portion may be directly attached, such as by hooking onto the extension portion. Moreover, when the pull-out part is attached to the extension part through the hole of the tube, the pull-out part may be inserted into the hole, or the extension part may be inserted into the hole. Attachment of the withdrawal part and the extension part may take place inside the tube.

(2) In the above embodiment, the first displacement mechanism is a hydraulic cylinder, but the first displacement mechanism is not limited to this. For example, the first displacement mechanism may be an electric cylinder. In that case, the burring device may not include a pump unit, but may have a control unit and a hand-operated button at the base, and may be configured to directly energize the first displacement mechanism.

(3) The process of the base holding down the tube from above and the process of attaching the pull-out part to the extension part may be performed in reverse order. That is, after the extraction part is attached to the extension part, the base part may be lowered so that it presses the tube.

(4) The shape of the pulled-out portion is not particularly limited. The drawing part may have any shape as long as it can be pulled out from the inside of the tube through the hole to the outside of the tube, thereby raising the end of the hole in the drawing direction.

DESCRIPTION OF SYMBOLS 1... Burring device, 5... Hydraulic hose, 7... Metal tube (pipe), 7A... Hole part, 10... Base part, 11... Opening part, 15... Lock pin (fixed part), 30... Upper part, 40... Cylinder (first part) 1 displacement mechanism), 50... Second displacement mechanism, 51... Wire, 51A... Both ends, 51B... Center part, 52... Lever part, 55... Force point part, 56... Action point part, 57... Fulcrum part, 60... Extension Existing part, 67... Pulling part, 69... Connection pin, 70... Wheel, 71... Leg part

Claims (9)

a base capable of holding a tube provided with a hole;
an upper part disposed above the base;
a first displacement mechanism that vertically displaces the upper part relative to the base;
an extension part extending downward from the upper part;
a pull-out part that is attachable to and detachable from the extension part and has a larger diameter than the hole part;
wheels arranged below the base to make the base movable;
When the pull-out part is attached to the extension part from the inside of the tube through the hole part, the base part presses the pipe, and the first displacement mechanism displaces the upper part upward with respect to the base part. , a burring device configured to allow the pull-out portion to be pulled out from the hole portion. The burring device according to claim 1, further comprising a second displacement mechanism that vertically displaces the base portion relative to the wheel based on the displacement of the upper portion by the first displacement mechanism. a leg to which the wheel is attached;
a second displacement mechanism for vertically displacing the base portion relative to the leg portions based on the displacement of the upper portion by the first displacement mechanism;
The second displacement mechanism is
The lever part and
A wire capable of connecting the lever part and the upper part,
The lever part is
a fulcrum connected to the leg;
a force point portion connectable to the wire;
The burring device according to claim 1 or 2, further comprising an action point portion connected to the base portion. The base includes an opening located below the extension,
The burring device according to claim 3, wherein the force point portion is located closer to the opening than the fulcrum portion and the action point portion. The burring device according to claim 4, wherein the action point portion is located closer to the opening than the fulcrum portion. The second displacement mechanism includes at least one pair of the lever parts,
The burring device according to any one of claims 3 to 5, wherein the wire has a central portion connected to the upper portion and both end portions connectable to the pair of lever portions. a leg to which the wheel is attached;
a second displacement mechanism that vertically displaces the base relative to the legs based on the displacement of the upper part by the first displacement mechanism;
The burring device according to any one of claims 1 to 6, further comprising a fixing part that can fix the position of the base with respect to the leg. Any one of claims 1 to 7, wherein a connecting pin is inserted into the pull-out part and the extension part, so that the pull-out part is attached to the extension part through the hole part. The burring device described in Section. Make a hole in the tube,
a base capable of holding the tube; an upper part disposed above the base; a first displacement mechanism that vertically displaces the upper part relative to the base; and a first displacement mechanism extending downward from the upper part. A burring device comprising an extension part, a pull-out part that is detachable from the extension part and has a diameter larger than the hole part, and wheels arranged below the base part to make the base part movable. prepare,
inserting the pull-out part into the tube so as to be located below the hole;
moving the base so that the extending portion is located above the hole;
attaching the pull-out part to the extension part from inside the tube through the hole part;
holding the tube at the base;
A burring method, wherein the first displacement mechanism displaces the upper part upward with respect to the base, thereby pulling out the pull-out part from the hole.

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