JP4555708B2 - Roller guide device - Google Patents

Description

  The present invention relates to a roller guide device that guides a rolled material to a rolling mill. More specifically, the present invention is installed in the vicinity of a rolling mill that rolls the rolled material into a product having a predetermined shape and size. The present invention relates to a roller guide device that guides to a roller.

  In a rolling mill that rolls a rolled material into a product having a predetermined shape and size, the rolled material must be accurately centered and fed into the rolling mill. Therefore, conventionally, a roller guide device for guiding the rolled material is provided near the entrance of the rolling mill. These roller guide devices are usually centered by supporting the rolled material from three points by three roller holders.

  The roller holder has a lever-like shape and is supported by a cylindrical box-like frame so as to be swingable by a rotation support shaft. Each roller holder is concentrically arranged around the rolled material to be guided at intervals of 120 degrees. Has been. A rotatable guide roller is provided at the tip of the roller holder. Accordingly, the rolled material is supported from three directions by the guide roller provided at the tip of the roller holder, and is guided to the roll of the rolling mill while being positioned.

  By the way, when the thickness of the rolling material to guide, a cross-sectional shape, etc. differ, a roller guide apparatus needs to adjust the space | interval which each guide roller opposes widen or narrows. Conventionally, this guide roller center adjustment is performed by bringing a pressure screw into contact with the rear end of each roller holder and turning the pressure screw to rotate the roller holder around the rotation support shaft. To adjust the distance between the cores of the guide rollers (see, for example, Patent Document 1).

  However, if the center adjustment is performed by rotating the pressure screw independently for each roller holder, it is not easy to precisely adjust the center distance between all the roller holders, which is extremely laborious. For this reason, means for adjusting all the roller holders by the same amount at a time has been proposed (see, for example, Patent Documents 2 and 3). That is, in each of these prior arts, a pressure screw composed of a bolt and a lock nut is screwed at the rear end of the roller holder, and the top of the pressure screw is brought into contact with an inter-center adjusting member or the like. Yes.

And by moving this center adjustment member etc. in the guide axis direction of the rolled material, the tops of all the pressure screws are moved in the same axial direction, thereby adjusting the intervals between all the roller holders at the same time. Yes. On the other hand, when adjusting the center of the core for a specific roller holder, the pressure screw of that roller holder is screwed in or unscrewed, and the top position of this pressure screw is moved in the direction of the guide axis of the rolling material. ing.
Japanese Utility Model Publication No. 5-70707 (page 1-2, FIG. 1) JP-A-10-180336 (page 1-4, FIG. 1) JP 2004-90019 A (page 1-10, FIG. 1)

  However, with the means of Patent Document 2 and Patent Document 3 described above, it is possible to adjust the distance between the cores of all the roller holders at the same time, but when adjusting the distance between the cores for a specific roller holder alone. It is necessary to screw in or unscrew the pressure screw of the roller holder. However, since the pressure screw is located inside the box-shaped frame, the workability is poor, and it takes time to loosen the lock nut, turn the bolt, and tighten the lock nut again.

  In addition, since the workability is poor, the lock nut is not sufficiently tightened, and the lock nut is loosened during use or the like, and the gap between the roller cores is out of order, which may adversely affect the product accuracy. Further, when the lock nut is tightened during the adjustment between the cores, the distance between the cores is also moved, so that the high-precision adjustment cannot be performed and the product accuracy may be adversely affected.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a roller guide device that can easily and quickly adjust a plurality of guide rollers as a whole and a single center distance and improve the center distance adjustment accuracy.

  The roller guide device according to the present invention is characterized in that the setting position of the guide roller is adjusted by the rotation shaft, a driven gear is provided on the rotation shaft, and a plurality of the driven gears are simultaneously rotated by the driving gear. By rotating the gear through the adjusting gear and enabling the transmission of the mutual rotational force between the rotating shaft and the driven gear to be interrupted by the clutch means, the entire plurality of guide rollers can be viewed from the outside of the frame. In addition, the distance between the cores can be adjusted individually.

  That is, the inventor of the present invention has proposed means capable of adjusting the distance between the cores for each of the plurality of guide rollers as a whole and in each of Patent Documents 2 and 3 described above. As described above, each of these means includes a plurality of rollers by bringing a center adjustment member or the like capable of moving back and forth in the guide direction of the rolled material into contact with the top of the pressure screw provided at the rear end of the roller holder. The setting position of the holder is adjusted at the same time by the same amount. Then, the setting position of the roller holder is adjusted independently by rotating the pressure screw and moving the top position back and forth.

  However, in such a structure, the top portion of the pressure screw is covered by an inter-core adjusting member that abuts the pressure screw, so that the top portion of the pressure screw is exposed to the outside of the frame, for example, at the outer position of the frame, It becomes difficult to adopt a configuration in which the pressure screw is rotated. Therefore, as a result of the inventive idea, the inventor adjusts the setting position of the roller holder with the rotation shaft provided with the driven gear, rotates the driven gear with the driving gear, and the rotation shaft and the driven gear. By providing the clutch means in between, it is possible to rotate all the driven gears simultaneously with the driving gears, and to make the rotation shaft all and independently rotatable at the outer position of the frame. I found out that I can do it.

  That is, the roller guide device according to the present invention is a guide device that guides the rolling material to the rolling mill, and includes a frame, a plurality of roller holders, and a center adjustment unit that adjusts the center of the roller holder. . The roller holder is swingably supported by the frame, and a guide roller is rotatably provided at one end thereof. The roller holder is urged in the swinging direction by an elastic member. The inter-center adjustment means meshes with the driven gear, a roller holder adjusting mechanism that adjusts the setting position of the guide roller, a rotating shaft that moves the roller holder adjusting mechanism, a driven gear provided on the rotating shaft, and the driven gear. A drive gear, an adjustment gear meshing with the drive gear, and drive means for rotating the adjustment gear are provided. The rotary shaft and the driven gear are capable of intermittently transmitting the mutual rotational force by the clutch means.

  Here, “between cores” means a distance between a center position surrounded by each guide roller provided at one end of a plurality of roller holders and the guide roller. The “elastic member” is not limited to a coil spring, which will be described later, but also includes other members such as a leaf spring and a torsion bar, and includes not only a member that pushes up the roller holder but also a member that pulls up. Further, the “swinging direction” includes not only the direction of opening the core but also the direction of narrowing. The “set position of the roller holder” means a swing angle of the roller holder such that the center distance becomes a target set value. The “roller holder adjustment mechanism” includes all mechanisms that can change the “setting position of the roller holder”, and is not limited to a mechanism using a gear and a rack, which will be described later. A mechanism for adjusting the setting position of the roller holder by pressing is also included.

  As will be described later, the “rotary axis” is not limited to the case of being provided horizontally in the guide direction of the rolled material, that is, the longitudinal direction, and includes cases in which it is provided in a direction perpendicular to the guide direction or at other angles. Further, the “driven gear” and the “driving gear” provided on the “rotating shaft” are not limited to spur gears as described later, but also include bevel gears. That is, when the “rotating shaft” is provided in a direction crossing the guide direction of the rolled material, the “driven gear” can be formed by using the “driven gear” as a bevel gear and the “drive gear” as a bevel gear. Thus, all “driven gears” can be rotated simultaneously. The “drive gear” is not limited to a ring-shaped internal gear as will be described later, but also includes a ring-shaped or solid external gear.

  The “clutch means” includes all means capable of transmitting or separating the mutual rotational force between the “rotating shaft” and the “driven gear”. Means by mating pins and engagement splines are also included.

  The roller holder adjusting mechanism includes a gear provided on the roller holder and a rack meshing with the gear. The rotating shaft is screwed into the rack, and the rack moves forward and backward by the rotation of the rotating shaft. It is desirable to configure as follows. Here, the “gear provided on the roller holder” is not limited to the case where the “roller holder” and the “gear” are coupled by bolt coupling or fitting as described later, but the “roller holder” and the “gear”. And the case where they are integrally formed.

  The clutch means includes an expandable / contractible ring member having a wedge-shaped cross section, and the ring member is inserted between the outer periphery of the rotating shaft and the inner periphery of a central hole provided in the driven gear. It is desirable to configure as follows. Then, by moving the ring member in the axial direction, the outer periphery of the rotating shaft and the inner periphery of the center hole of the driven gear are coupled or separated. Here, the “expandable ring member having a wedge-shaped cross section” is not limited to the case where there are two “ring members” as will be described later. By moving in the axial direction, the wedge-shaped cross-section bites in and out between the outer periphery of the rotating shaft and the inner periphery of the center hole provided in the driven gear, thereby coupling the rotating shaft and the driven gear. Including those to be separated.

  The driven gear is preferably a spur gear, and the driving gear is preferably a ring-shaped internal gear. Further, the drive means includes an adjustment shaft that protrudes outside the frame, a worm provided on the adjustment shaft, a pinion that meshes with the worm, and a shaft that supports the pinion, and the adjustment gear includes the shaft. It is desirable to be provided.

  Since the distance between the cores can be adjusted from the outside of the frame for each of the plurality of guide rollers and for each individual, the workability of these distance adjustments is greatly improved. Therefore, not only the whole guide rollers but also the single inter-center adjustment can be performed easily and quickly, and the inter-center adjustment accuracy can be improved. By urging the roller holder in the swinging direction by the elastic member, it is possible to absorb backlash, play, etc., such as the gears and the abutting portions, so that accurate and reliable center adjustment can be performed. Further, since the drive gear is rotatably supported by a plurality of driven gears, it is not necessary to provide a separate rotation support shaft for the drive gear, and the structure is simplified.

  As an adjustment mechanism that adjusts the distance between the cores of each roller holder, by providing a gear to the roller holder, meshing the rack with this gear, rotating the rotating shaft that is screwed into this rack, and moving this rack back and forth, As in the conventional example, wear of the contact surface, which is a problem when the center adjustment member is brought into contact with the top of the pressure screw, or another member is interposed on the contact surface to prevent this wear, etc. It is possible to avoid the complexity of the structure.

  By adopting a structure in which the expandable / retractable ring member having a wedge-shaped cross-sectional shape is taken in and out as the clutch means between the outer periphery of the rotary shaft and the inner periphery of the center hole provided in the spur gear, the structure can be simplified. The rotating shaft and the driven gear can be connected or separated easily and reliably.

  By making the driven gear into a spur gear and the driving gear into a ring-shaped internal gear, for example, the end of the rotary shaft on which the driven gear is provided is surrounded by the blade edge of the ring-shaped internal gear. It is easy to expose to the outside of the frame through the internal opening hole. For this reason, each rotating shaft can be easily and accurately rotated from the outside. Further, by driving the adjustment gear that rotates the drive gear by the adjustment shaft that protrudes to the outside of the frame, it is possible to simultaneously adjust the centers of all the plurality of roller holders from the outside.

  With reference to FIGS. 1-8, the structure of the roller guide apparatus by this invention, etc. are demonstrated. First, as shown in FIG. 1, a roller guide device 1 according to the present invention is installed on the entry side of a rolling mill C that rolls a rolled material A into a product B having a predetermined shape and size. Along with this, it is guided accurately to this rolling mill. Note that the roller guide device 1 may be installed on the exit side of the rolling mill C in order to prevent the swing of the product B after rolling.

  Now, as shown in FIGS. 2 and 3, the main components of the roller guide device 1 according to the present invention are a frame 2 formed of a substantially cylindrical housing, three roller holders 3 arranged at axially symmetric positions, and The center adjustment means 4 for adjusting the center of the roller holder is provided. The roller holder 3 is formed in a lever shape having a leading end bent toward the central axis, and is supported on the frame 2 by a rotation support shaft 5 so as to be swingable at a portion close to the rear end. A guide roller 31 is rotatably provided at the tip of the roller holder 3. The roller holder 3 is pushed up by the coil spring 21 between the tip portion and the rotation support shaft 5 in the direction in which the center of the guide roller 31 is opened.

  That is, the three roller holders 3 support the outer periphery of the rolled material A from three directions by a rotatable guide roller 31 provided at the tip, and the rolled material is passed along the pass line L to the rolling mill C. invite. The roller holders 3 are preferably arranged at three equiangular intervals in a concentric circle centered on the pass line L, but may be four or more as required, and the swinging direction is As long as both are directed toward the pass line L, they may be arranged at non-equal angular intervals.

  The center-to-core adjusting means 4 is a driven unit comprising a roller holder adjusting mechanism 41 for adjusting the setting position of the roller holder 3, a rotating shaft 42 for moving the roller holder adjusting mechanism, and a spur gear provided on the rotating shaft. A gear 43; a drive gear 44 comprising a ring-shaped internal spur gear meshing with the driven gear; an adjustment gear 45 comprising a spur gear meshing with the drive gear; and drive means 46 for rotating the adjustment gear. Yes. The rotating shaft 42 and the driven gear 43 can be intermittently engaged with each other by the clutch means 47. In addition, since other components are generally used in a known roller guide device, description thereof is omitted.

  Next, the inter-center adjusting means 4 will be described in detail. As described above, the center-to-center adjustment unit 4 includes three sets of roller holder adjustment mechanisms 41 that adjust the setting position of the roller holder 3. As shown in FIG. 2, the roller holder adjusting mechanism 41 includes a gear 411 provided in the roller holder 3 and a rack 412 that meshes with the gear. Further details will be described with reference to FIG. That is, the gear 411 has a fan-shaped gear portion 411a formed on the upper portion, and flange portions 411b project from both sides on the opposite side of the gear portion, and this flange portion is a screw (not shown). To the upper surface of the roller holder 3. The fan-shaped gear portion 411a provided in the gear 411 is engaged with a horizontal gear portion 412a formed at the lower end of the rack 412, and the gear 411 is rotated by moving the rack forward and backward along the path line L, The roller holder 3 is swung around the rotation support shaft 5 as an axis.

  Next, a configuration for moving the rack 412 back and forth along the pass line L will be described. That is, as shown in FIG. 4, the rack 412 is formed in a substantially rectangular cross-sectional shape, and a female screw hole 412b is formed through the center. On the other hand, the rotary shaft 42 has a flanged bolt shape, and has a slightly larger diameter as viewed from the tip, a cylindrical tip shaft portion 42a, a male screw 42c, and a circular flange portion 42b provided at a substantially central portion. A rear shaft portion 42d having a circular cross section and a cylindrical clutch receiving portion 42e are formed in this order. The male screw 42c is threaded through a female screw hole 412b provided in the rack 412, and the distal end shaft portion 42a is slidably inserted into an opening hole 413a provided in the holder 413.

  In addition, a rectangular groove 413b having a substantially rectangular cross-sectional shape is formed in the holder 413, and a flange portion 413c provided on the opposite side of the rectangular groove is fixed to the frame 2 by screws (not shown). A rack 412 having a substantially rectangular cross-sectional shape is inserted into the rectangular groove 413b of the holder 413. Therefore, the rack 412 can move only in the front-rear direction within the rectangular groove 413b, but cannot rotate. Therefore, when the rotating shaft 42 rotates, the male screw 42c formed on the rotating shaft moves the rack 412 in the front-rear direction via the female screw 412b screwed to the rotating screw 42c.

  As described above, the roller holder 3 is pushed up by the coil spring 21 in the direction in which the core is opened, so that the gear 411 is urged to rotate clockwise in FIG. For this reason, the rack 412 meshing with the gear 411 and the rotating shaft 42 engaged with the rack are always urged to the right. Therefore, even when the rotation shaft 42 is turned to adjust the center distance, the circular flange portion 42b provided at the substantially central portion of the rotation shaft presses the side surface of the insertion groove of the circular flange portion provided in the frame 2 in the right direction. Therefore, the rotating shaft does not move in the axial direction, and at the same time, backlash, play, and the like of the gear 411 and the rack 412 and the rotating shaft can be eliminated.

  Next, a configuration for rotating the rotating shaft 42 will be described. As shown in FIGS. 2 and 5, the rotating shaft 42 is arranged in parallel to the pass line L at a position separated by 120 degrees, and the front end shaft portion 42 a and the rear side shaft portion 42 d are respectively connected to the holder 413. And an opening hole 413 a provided in the frame 2 and an opening hole 2 a provided in the frame 2. The rear end of the clutch receiving portion 42e of the rotating shaft 42 is exposed to the outside on the front side of the frame 2, and as shown in FIG. 4, a hexagonal hole 42f for tool insertion is provided at the center of the rear end surface of the clutch receiving portion. Is provided. Instead of the hexagonal hole 42f, the rear end of the clutch receiving portion 42e of the rotating shaft 42 may protrude from the front side surface of the frame 2, and a hexagon or serration on which a tool can be attached is formed on the protruding outer periphery. Good.

  The clutch receiving portion 42e of the rotary shaft 42 is fitted with driven gears 43 each consisting of a spur gear with a clutch means 47 to be described later interposed therebetween. Ring-shaped inner planes are attached to the three driven gears. A drive gear 44 made of a gear is engaged. As shown in FIG. 5, the drive gear 44 is engaged with an adjustment gear 45 made of a spur gear that rotates the drive gear.

  Therefore, if the engagement between the driven gear 43 and the rotating shaft 42 is released by the clutch means 47, an Allen wrench or the like is inserted into the hexagonal hole 42f provided at the center of the rear end surface of the rotating shaft, and the rotating shaft is moved. Each can be rotated independently. In this way, the setting position for each roller holder 3 can be adjusted easily and quickly from the outside of the frame 2. On the other hand, if the driven gear 43 and the rotary shaft 42 are engaged by the clutch means 47, all the rotary shafts are simultaneously set to the same amount by the rotation of the drive gear 44 via the driven gear meshing with the driven gear 44. Can be rotated. Therefore, if the adjusting gear 45 meshing with the driving gear 44 is rotated by the driving means 46 described later, the setting positions of all the roller holders 3 can be easily and quickly adjusted simultaneously from the outside of the frame 2.

  Next, the drive means 46 that rotates the adjustment gear 45 from the outside of the frame 2 will be described. As shown in FIGS. 6 and 7, the driving means 46 includes an adjustment shaft 461 that protrudes laterally outside the frame 2, a worm 462 provided on the adjustment shaft, a pinion 463 that meshes with the worm at a right angle, and the pinion And a shaft 464 for supporting the motor. The shaft 464 is provided in the guide direction of the rolled material, and an adjustment gear 45 that rotates the drive gear 44 is formed at one end of the shaft. The protruding adjustment shaft 461 is formed on the hexagonal head. The adjustment shaft 461 and the worm 462, the pinion 463, the adjustment gear 45, and the shaft 464 may be integrally formed, or may be combined as separate components. Further, the adjusting shaft 461 is not limited to the hexagonal head shape, but may be another tool mounting shape such as a hexagonal hole.

Next, the clutch means 47 will be described. As shown in FIG. 8, the clutch means 47 has an outer ring 471, an inner ring 472, and a nut 473. The outer ring 471 and the inner ring 472 have a wedge-shaped cross-sectional shape in which the tapered surfaces 471a and 472a face each other. The outer ring 471 is divided into four portions of 90 degrees, while the inner ring 472 has six axial slits, leaving a slight length at one end. The nut 473 is screwed into a screw 472b provided on the outer periphery of one end of the inner ring 472, and a locking portion 473a provided on one end of the nut is a circle provided on the inner periphery of one end of the outer ring 471. It is engaged with the circumferential groove 471b.

  The outer ring 471 and the inner ring 472 are inserted between the outer periphery of the clutch receiving portion 42 e of the rotating shaft 42 and the inner periphery of the center hole 43 a provided in the driven gear 43. Therefore, when the nut 473 is rotated, the outer ring 471 and the inner ring 472 approach each other in the axial direction, and the respective tapered surfaces 471a and 472a bite into each other like a wedge, pushing out the outer shape of the outer ring, The inner diameter of the inner ring is reduced. Therefore, the outer ring 471 and the inner ring 472 press the outer periphery of the clutch receiving portion 42e of the rotating shaft 42 and the inner periphery of the center hole 43a provided in the driven gear 43 with a strong force. And the driven gear are interconnected.

  On the other hand, when the nut 473 is rotated in the reverse direction, the outer ring 471 and the inner ring 472 are separated in the axial direction, and the coupling between the respective tapered surfaces 471a and 472a is released. As described above, transmission of mutual rotation between the rotating shaft 42 and the driven gear 43 can be interrupted easily and quickly simply by turning the nut 473 or turning it back.

  Since the roller guide device of the present invention can be widely applied in various types of rolling in which a raw material needs to be accurately fed, it can be widely used in industries related to the roller guide device in these rolling.

It is a schematic block diagram of the rolling line which guides a rolling material to a rolling mill with a roller guide apparatus. It is a cross-sectional view of a roller guide device. It is a rear view of a roller guide apparatus. It is a component diagram of a roller holder adjustment mechanism. It is a front view of a roller guide device. It is sectional drawing of a drive means. It is a component diagram of a drive means. It is a cross-sectional view of a clutch means.

Explanation of symbols

1 Roller guide device 2 Frame 21 Coil spring (elastic member)
DESCRIPTION OF SYMBOLS 3 Roller holder 31 Guide roller 4 Center-to-center adjustment means 41 Roller holder adjustment mechanism 411 Gear 412 Rack 42 Rotating shaft 43 Driven gear 43a Center hole 44 Drive gear 45 Adjustment gear 46 Drive means 461 Adjustment shaft 462 Warm 463 Pinion 464 Shaft 47 Clutch Means 471 Outer ring (ring member)
472 Inner ring (ring member)
5 Rotating support shaft

Claims (5)

A guide device for guiding a rolling material to a rolling mill,
A frame (2), a plurality of roller holders (3), and an inter-center adjusting means (4) for adjusting the inter-core intervals of the roller holders;
The roller holder (3) is swingably supported by the frame (2), and a guide roller (31) is rotatably provided at one end thereof.
The roller holder (3) is urged in the swinging direction by the elastic member (21),
The inter-center adjusting means (4) is provided on a roller holder adjusting mechanism (41) for adjusting the setting position of the roller holder (3), a rotating shaft (42) for moving the roller holder adjusting mechanism, and the rotating shaft. A driven gear (43), a driving gear (44) meshing with the driven gear, an adjusting gear (45) meshing with the driving gear, and a driving means (46) for rotating the adjusting gear,
The roller guide device, wherein the rotation shaft (42) and the driven gear (43) can be intermittently transmitted with each other by a clutch means (47). In Claim 1, the roller holder adjusting mechanism (41) includes a gear (411) provided on the roller holder (3) and a rack (412) meshing with the gear,
The roller guide device, wherein the rotating shaft (42) is screwed into the rack (412), and the rack moves forward and backward by rotation of the rotating shaft. The clutch means (47) according to any one of claims 1 and 2, comprising an expandable / contractible ring member (471, 472) having a wedge-shaped cross section,
The ring member (471, 472) is inserted between the outer periphery of the rotating shaft (42) and the inner periphery of the center hole (43a) provided in the driven gear (43),
By moving the ring members (471, 472) in the axial direction, the outer periphery of the rotating shaft (42) and the inner periphery of the center hole (43a) of the driven gear (43) are coupled or separated. A featured roller guide device.       The roller guide device according to any one of claims 1 to 3, wherein the driven gear (43) is a spur gear, and the driving gear (44) is a ring-shaped internal gear. The drive means (46) according to any one of claims 1 to 4, wherein the drive means (46) includes an adjustment shaft (461) protruding outside the frame (2), a worm (462) provided on the adjustment shaft, A pinion (463) that meshes with the worm, and a shaft (464) that supports the pinion,
The adjustment gear (45) is provided on the shaft (464).