JP2019135060A - Roller and traveling carriage - Google Patents

Abstract

To provide a roller preventing derailment from a guide groove when engaged with the guide groove composed of a pair of inclined surfaces formed on the rail and a square groove and rotating, and a traveling carriage fitted with the roller.SOLUTION: A roller A that is engaged with guide grooves 51 composed of square grooves 51b and a pair of inclined surfaces 51a formed on a bottom part and rotates has: a tapered part 2 whose diameter expands as it approaches a center in a thickness direction; and an almost square projection 3 arranged on an end side of the tapered part. An inclination angle of the tapered part is equal to an inclination angle of the inclined surfaces 51a in the guide grooves and width dimension of the projection part is smaller than the width dimension of the square grooves 51b. A traveling carriage B has a driving roller 11 arranged on a carrier body 10 and the roller A arranged on the carrier body.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a roller that prevents a wheel from being removed from a rail having a guide groove, and a traveling carriage to which this roller is attached.

  When cutting or welding workpieces typified by steel plates, run while operating a gas cutting torch, plasma cutting torch, plasma welding torch, carbon dioxide welding torch, etc. (hereinafter referred to as “processing torch”). A traveling cart is generally used. In such a traveling cart, a plurality of hoses and power cords are connected to the mounted processing torch. For example, in the case of a processing torch using gas combustion heat generation, an oxygen gas hose and a fuel gas hose are connected. In the case of a processing torch that uses heat generated by a plasma arc, a plasma gas hose and a cooling water hose are connected. Further, in the case of a processing torch that uses heat generated by an arc, a carbon dioxide hose is connected.

  The hoses connected to the processing torch mounted on the traveling carriage are generally placed on the surface of the workpiece and are pulled by the traveling carriage. For this reason, the friction between the hoses and the workpiece is a great resistance to the traveling of the traveling carriage.

  Some traveling carts are placed on rails installed on the workpiece and perform only linear travel, while others are mounted on rails and can travel linearly and are placed on the workpiece. Some of them are capable of traveling according to the manual guidance of the workers.

  A traveling carriage configured to be able to travel linearly while being mounted on a rail and to be able to travel by guidance of an operator includes at least three driving rollers and at least one free roller. It has a roller. The free rollers are configured so as to be freely rotatable around a rotation shaft arranged in a direction perpendicular to the ground contact surfaces of these rollers and to rotate with the rotation of the drive roller.

  Therefore, the operator grips the guide handle and guides along the target processing line, and operates the mounted processing torch while rotating the driving roller to process the processing line including straight lines and curves. Is possible. In addition, by installing a linear rail with a guide groove on the surface of the workpiece, placing a drive roller on the rail and inserting a free roller into the guide groove while running, operating the mounted processing torch Is possible.

  The rail that guides the straight traveling of the traveling carriage will be described with reference to FIG. As shown in the figure, the rail 50 is formed in a plate shape having a predetermined length, and a pair of guide grooves 51 are formed in parallel at predetermined positions in the width direction. Further, a projection 50a for connecting to another rail is formed at one end in the longitudinal direction, and a recess 50b for receiving the projection 50a is formed at the other end. Therefore, it is possible to form a continuous linear rail by arranging a plurality of rails 50 in series and inserting the projections 50a into the recesses 50b of the other rails 50 adjacent to each other.

  Each guide groove 51 formed in the rail 50 is formed by a pair of opposed inclined surfaces 51a and a square groove 51b connecting the lower ends of the pair of inclined surfaces 51a. That is, the pair of inclined surfaces 51a form a V-shaped groove having a large separation dimension at a portion corresponding to the upper surface of the rail 50 and a small separation dimension at a portion corresponding to the lower portion. Are connected by a square groove 51b. When a pair of inclined surfaces are connected to each other to form a V-shaped groove, it is a common practice to escape the connecting portion with a square groove, and the width and depth dimensions of the square groove are the inclination angle of the inclined surface. It is appropriately set according to the outer shape of the inserted roller.

  Further, as shown in FIG. 6, the roller 56 constituting the free roller provided in the mounting portion 55 of the traveling carriage is an angle corresponding to the angle of the inclined surface 51a of the guide groove 51 formed on both side surfaces in the thickness direction. And a flat surface 56b formed at the center in the thickness direction and connected to the tip end portion of the tapered surface 56a. When the roller 56 is inserted into the guide groove 51 of the rail 50, the pair of tapered surfaces 56a are in contact with the pair of inclined surfaces 51a, and the flat surface 56b is inserted without contacting the bottom surface of the square groove 51b. Has been.

  In particular, the flat surface 56b contacts the surface of the workpiece together with the drive roller and other rollers when the traveling carriage is placed on the workpiece without the rail 50 interposed. The flat surface 56b maintains a contact state with the surface of the workpiece, and the free roller 56 rotates as the traveling carriage travels.

  In the traveling carriage as described above, when the roller 56 constituting the free roller is fitted into the guide groove 51 of the rail 50, the tapered surface 56a contacts the inclined surface 51a, and the flat surface 56b enters the square groove 51b. Become. Normally, in this state, as the traveling carriage travels, the roller 56 rotates while maintaining the state of being fitted in the guide groove 51.

  However, when a large resistance force acts on the hoses pulled by the traveling carriage, a force that travels in an arc shape around the point of action of the resistance force acts on the traveling carriage. As a result, a lateral force acts on the roller 56, and the tapered surface 56 a rotates while rising along the inclined surface 51 a of the guide groove 51. If this state continues, there is a possibility that the roller 56 may come out of the guide groove 51.

  It is an object of the present invention to prevent wheel disengagement from a guide groove even when a lateral force is applied when rotating in a guide groove comprising a pair of inclined surfaces and a square groove formed on a rail. Another object is to provide a roller and a traveling carriage to which the roller is attached.

  In order to solve the above-described problems, a roller according to the present invention is a roller that is fitted into a guide groove formed of a square groove formed in a bottom portion and a pair of inclined surfaces connected to an upper end of the square groove and rotates. And having a tapered portion whose diameter increases toward the center in the thickness direction, and a substantially square-shaped protrusion disposed on the tip side of the tapered portion, and the inclination angle of the tapered portion is An angle of inclination of the inclined surface in the guide groove formed by a square groove formed at the bottom and a pair of inclined surfaces connected to the upper end of the angular groove is equal, and the width of the protrusion is the bottom This is smaller than the width dimension of the square groove in the guide groove formed by the square groove formed on the guide groove and a pair of inclined surfaces connected to the upper end of the square groove.

  Further, the traveling carriage according to the present invention includes a traveling carriage having a roller that is fitted into a guide groove formed of a square groove formed in the bottom and a pair of inclined surfaces connected to the upper end of the angular groove and rotates. A driving roller disposed in the cart body, a taper portion disposed in the cart body, the diameter of which increases toward the center in the thickness direction, and a substantially square shape disposed on the tip side of the taper portion. And an inclined surface in a guide groove comprising a square groove formed at the bottom and a pair of inclined surfaces formed connected to the upper end of the angular groove. And the width of the protrusion is equal to the angle of inclination of the angular groove of the guide groove formed by a square groove formed at the bottom and a pair of inclined surfaces connected to the upper end of the angular groove. And a roller smaller than the width dimension.

  In the roller according to the present invention, when fitted into the guide groove, the tapered portion comes into contact with the pair of inclined surfaces, and the substantially square-shaped protrusion is fitted into the square groove. Then, when the taper portion is going to rise along the inclined surface, the side surface of the projection portion is engaged with and locked to the side surface of the square groove. For this reason, it is possible to prevent the roller from being removed from the guide groove.

  Moreover, in the traveling trolley | bogie which concerns on this invention, it can drive | work along a guide groove by rotating a drive roller in the state which fitted the roller to a pair of inclined surface of a guide groove. Then, resistance acts on the hoses pulled by the traveling carriage, and when the taper portion tries to run up along the inclined surface in a direction different from the guide direction by the guide groove, the side surface of the projection portion is angular. Engage with the side surface of the groove to be locked. For this reason, the traveling carriage can travel in the direction along the guide groove.

It is a figure explaining the structure of the roller which concerns on a present Example. It is a top view explaining the structure of the traveling vehicle which concerns on a present Example. It is a side view explaining the structure of the traveling vehicle which concerns on a present Example. It is a front view explaining the structure of the traveling vehicle which concerns on a present Example. It is a figure explaining the structure of a rail, (a) is a front view, (b) is an enlarged side view. It is a figure explaining the structure of the conventional roller.

  Hereinafter, a roller according to the present invention and a traveling carriage having the roller will be described. The roller according to the present invention is disposed in the main body of the traveling carriage, and when the traveling carriage travels along a target processing line including a curve, the traveling direction is changed according to the guidance of the worker, and the traveling carriage When the vehicle travels linearly, it is configured to be fitted into a guide groove formed in the rail and to rotate along the guide groove.

  The roller according to the present invention has a tapered portion and a substantially square-shaped protruding portion disposed on the tip side of the tapered portion. The inclination angle of the taper portion is not limited, and may be any angle that is equal to the inclination angle of the inclined surface that constitutes the guide groove formed in the rail that is generally used at present. Further, the width dimension of the protrusion is not limited, and may be smaller than the width dimension of the square groove formed at the bottom of the pair of inclined surfaces constituting the guide groove. There is no particular limitation on how much the width of the protrusion is smaller than the width of the square groove, and the width may be set in consideration of conditions such as workability.

  Further, the traveling carriage according to the present invention is used when a processing torch such as a cutting torch or a welding torch is mounted and intended processing is performed on a workpiece typified by a steel plate. In particular, it is possible to process a workpiece along a processing line including a curve by being manually guided by an operator, and to be able to process the workpiece in a straight line by being guided by a rail. It is configured.

  Hereinafter, the configuration of the roller A according to the present embodiment and the traveling carriage B using the roller A will be described with reference to the drawings. First, the overall configuration of the traveling carriage B will be briefly described. As shown in FIGS. 2 to 4, the traveling carriage B has a carriage main body 10 in which a drive motor and a clutch mechanism (not shown) are accommodated. The driving roller 11 and the driven roller 12 are arranged on one end side (the end side in the direction of arrow a) of the cart body 10, and the roller A is arranged on the other end side (the end side in the direction of arrow b). Has been.

  A stand 13 for mounting a torch holder (not shown) configured to hold the machining torch and adjust the height and inclination angle of the machining torch from the workpiece is disposed on the upper surface of the carriage body 10. Yes. A connector 14 for connecting a power cord, a switch 15 for setting a traveling direction, a clutch lever 16 and a speed adjustment dial 17 are arranged on the upper surface of the cart body 10.

  In particular, the other end side (the end side in the direction of arrow b) of the cart body 10 is provided with a guide handle 18 that is used when an operator guides the travel direction of the travel cart B by manual operation. .

  Further, a shielding plate 19 for shielding a flame, heat or spatter generated when the workpiece is processed is detachably attached to the side surface of the cart body 10.

  In the traveling carriage B configured as described above, the drive roller 11 is configured to have a large diameter portion 11a and a small diameter portion 11b, and when the linear machining is performed using the rail 50, the small diameter portion 11b is configured as the rail 50. The large diameter portion 11a rotates without contacting the rail 50. And when it is mounted on a workpiece without using the rail 50 and is guided by a worker and travels along a machining line including a curve, the large diameter portion 11a rotates in contact with the workpiece. It is configured as follows.

  The driven roller 12 includes a tapered portion 12a whose diameter increases toward the center in the thickness direction, and a flat surface 12b formed by connecting the tip end side of the tapered portion 12a. When the workpiece is linearly processed using the rail 50, the workpiece 50 is inserted into the guide groove 51 of the rail 50 and rotated. In addition, when the vehicle is placed on the workpiece without using the rail 50 and travels along a processing line including a curve guided by an operator, the flat surface 12b contacts the workpiece, and the drive roller 11 And the driven rotation corresponding to the induced traveling direction.

  A bracket 20 that rotatably supports the roller A is disposed on the guide handle 18 side of the carriage body 10, and the bracket 20 is attached to an attachment portion 21 that is a hole formed in the carriage body 10 in a vertical direction. .

  The bracket 20 includes a shaft member 20a that fits into a hole in the mounting portion 21 and serves as a vertical shaft, a rotation shaft 20b that is attached to the shaft member 20a and rotates around the shaft member 20a in a horizontal plane, and a rotating shaft 20b. And a support member 20c attached to the lower end of the moving shaft 20b. The roller A is arranged at a predetermined distance from the shaft member 20a in the support member 20c, and is configured to be able to rotate in a vertical plane around the horizontal axis. Such a bracket 20 has the same structure as that conventionally used.

  Further, when the bracket 20 to which the roller A is attached is attached to the attachment portion 21, the line connecting the driven roller 12 disposed on the carriage body 10 and the shaft member 20 a coincides with the guide groove 51 formed on the rail 50. Yes.

  The roller A has a disc-shaped main body 1, a tapered portion 2 whose diameter increases toward the center in the thickness direction on the outer peripheral surface of the main body 1, and a distal end disposed on the distal end side of the tapered portion 2. It has a substantially square-shaped protrusion 3 composed of a surface 3a and both side surfaces 3b. The taper part 2 has an inclination angle equal to the angle of the pair of inclined surfaces 51a constituting the guide groove 51 formed in the rail 50, and can contact the entire surface in the depth direction of the inclined surface 51a. It is configured.

  The substantially square-shaped protrusion 3 of the roller A has a side surface of the square groove 51b formed at the bottom of the guide groove 51 formed on the rail 50 when the lateral force is applied to the roller A. And has a function of preventing the rising. For this reason, the shape of the front end surface 3a is not particularly limited, and may be formed by a flat surface, or may be formed as a concave surface or a protruding surface.

  The diameter of the substantially square protrusion 3 (the diameter of the tip surface 3a), which is the outer diameter of the roller A, is smaller than the outer diameter of the driven roller 12, and the traveling carriage B is directly placed on the workpiece. The large-diameter portion 11a of the driving roller 11, the flat surface 12b of the driven roller 12, and the tip surface 3a of the roller A may be configured so as to uniformly contact the surface.

  Further, the dimension in the thickness direction of the protrusion 3 (the dimension between both side surfaces 3b) is smaller than the width dimension of the square groove 51b formed at the bottom of the guide groove 51 formed in the rail 50. . Therefore, when the driven carriage 12 travels along the rail 50 and the driven roller 12 and the roller A are inserted into the guide groove 51, the protrusion 3 of the roller A is inserted into the angular groove 51 b of the guide groove 51.

  In the roller A configured as described above, when a lateral force acts on the roller A in a state where the roller A is fitted in the guide groove 51, the roller A attempts to rise up along the inclined surface 51a. The side surface 3b of the protrusion 3 can counter the lateral force acting in contact with the side surface of the square groove 51b of the guide groove 51. For this reason, even if some resistance force acts on the hoses pulled by the traveling carriage B and the traveling carriage B is restrained so as to travel in an arc shape, it is possible to resist this force and prevent derailment. Is possible.

  It is not limited how much the width dimension of the protrusion part 3 of the roller A is made smaller than the width dimension of the guide groove 51 b constituting the rail 50. For example, when the width dimension of the square groove 51b of the guide groove 51 is 5 mm, it is preferable that the width dimension of the protrusion 3 (the distance between the side surfaces 3b) is about 4.5 mm. In the case of such dimensions, the clearance between the side wall of the square groove 51b of the guide groove 51 and the side surface 3b of the protrusion 3 is about 0.25 mm.

  In the experiments of the present inventors, when a traveling carriage using a conventional roller is used and a lateral force is applied while the roller is inserted into the guide groove of the rail and traveled, derailment occurs at about 0.5 kgf. It was. In the traveling carriage B using the roller A according to the present embodiment, the wheel removal occurred when a force of about 15 kgf was applied. This is apparently because the side surface 3b of the protrusion 3 of the roller A is in contact with the side surface of the square groove 51 of the rail 50 and restricts the lateral movement.

  The roller and the traveling carriage according to the present invention can be used as a processing apparatus that processes a processing line including a curve by guidance of an operator and places the processing line on a rail to perform a linear processing.

A Roller B Traveling Car 1 Main Body 2 Tapered Part 3 Protruding Part 3a Tip Face 3b Side 10 Car Body 11 Driving Roller 11a Large Diameter Part 11b Small Diameter Part 12 Followed Roller 12a Tapered Part 12b Flat Surface 13 Stand 14 Connector 15 Switch 16 Clutch Lever 17 Speed adjustment dial 18 Guide handle 19 Shield plate 20 Bracket 20a Shaft member 20b Rotating shaft 20c Support member 21 Mounting portion 50 Rail 51 Guide groove 51a Inclined surface 51b Square groove

Claims (3)

A roller that is inserted into a guide groove formed of a square groove formed in the bottom and a pair of inclined surfaces connected to the upper end of the square groove and rotates.
A tapered portion whose diameter increases toward the center in the thickness direction, and a substantially square-shaped protrusion disposed on the tip side of the tapered portion,
The inclination angle of the tapered portion is equal to the inclination angle of the inclined surface in the guide groove composed of a square groove formed at the bottom and a pair of inclined surfaces formed connected to the upper end of the angular groove,
In addition, the width dimension of the protrusion is smaller than the width dimension of the square groove in the guide groove including the square groove formed at the bottom and a pair of inclined surfaces connected to the upper end of the square groove. A roller characterized by. A traveling carriage having a roller that fits and rotates in a guide groove formed by a square groove formed in the bottom and a pair of inclined surfaces connected to the upper end of the square groove,
A driving roller arranged in the cart body;
A taper portion that is disposed on the main body of the carriage and has a diameter that increases toward the center in the thickness direction; and a substantially square-shaped protrusion portion that is disposed on a tip side of the taper portion, and the inclination angle of the taper portion Is equal to the inclination angle of the inclined surface in the guide groove composed of a square groove formed in the bottom and a pair of inclined surfaces connected to the upper end of the angular groove, and the width dimension of the projection is A roller smaller than the width of the square groove in the guide groove comprising a square groove formed at the bottom and a pair of inclined surfaces formed connected to the upper end of the square groove, A traveling trolley.   The drive roller is disposed on one side in the traveling direction of the carriage body, and the roller is rotatably attached to a vertical shaft disposed on the other side in the traveling direction of the carriage body and perpendicular to the guide groove. The traveling vehicle according to claim 2, wherein the vehicle is a traveling vehicle.

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