JP2011045894A - Pinch roller device for conveying steel bar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten the overhang part of a roll drive shaft coupled to respective upper and lower rolls in a pinch roller device for conveying a steel bar installed at a conveying line for simultaneously conveying a plurality of steel bar materials and having at least a pair of upper and lower rolls that pinch one steel bar material of an objective conveying line across the other conveying line. <P>SOLUTION: The pinch roller device for conveying the steel bar includes: upper and lower roll drive shafts 113, 114 allowing the respective upper and lower rolls 111, 112 to be coupled to a tip and transmitting a rotational drive force to the respective rolls 111, 112; and upper and lower bearing casings 115, 116 rotatably supporting the respective roll drive shafts 113, 114 by having a bearing 117a at the tip side of the roll drive shaft and a bearing 117b at the base end side of the roll drive shaft and orthogonally crossing the conveying line to extend. The bearing 117a at the tip side of the roll drive shaft of the respective bearing casings 115, 116 is arranged nearer to a roll side than to the position of the other conveying line in a plan view. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention is installed in a steel bar manufacturing facility for manufacturing bar steel (steel wire, bar steel), sandwiches the steel bar with rotating upper and lower rolls, and imparts conveying force to the steel bar cooling floor. The present invention relates to a pinch roller device for steel strip conveyance that performs conveyance to a steel sheet.

  Conventionally, as an example of this type, a wire / bar-shaped material conveying device (hereinafter referred to as a conventional conveying device) described in Japanese Patent Laid-Open No. 9-323114 is known, and this will be described with reference to FIGS. . 8 is a side view of the conventional transfer apparatus, FIG. 9 is a top view of FIG. 8, FIG. 10 is a cross-sectional view taken along line AA in FIG. 8, FIG. 11 is a cross-sectional view taken along line BB in FIG. It is -C sectional drawing.

  The upper and lower rolls 1 and 2 are both attached to rotary shafts (roll drive shafts) 3 and 4, and the rotary shafts 3 and 4 are rotatably attached to cylindrical bearings (bearing casings) 5 and 6. The upper and lower bearings 5, 6 have swing frames 7, 8, adjustment levers 9, 10, and open / close levers 11, 12 attached to the outer periphery of the body, and swing the upper swing frame 7 to the upper side of the frame body 13. The lower swing frame 8 is attached to the lower side of the frame body 13 by using the shaft 14 and swingable in the vertical direction using the swing shaft 15.

  The upper adjustment lever 9 is attached to an upper roll fine adjustment device 16 attached to the frame main body 13, and is moved and adjusted in the vertical direction by operating the upper roll fine adjustment device 16. The upper roll fine adjustment device 16 includes a worm jack 17, an adjustment handle 18 for operating the worm jack 17, and a mounting portion 20 of the upper adjustment lever 9 fixed to the tip of the lifting shaft 19 of the worm jack 17. By rotating the adjustment handle 18, the upper adjustment lever 9 is moved and adjusted in the vertical direction via the worm jack 17.

  The lower adjustment lever 10 is used to regulate the raising / lowering (opening / closing) position of the lower roll 2, and finely adjust the upper limit position of the lower roll 2 attached to the installation frame 21 provided in the vertical direction of the frame body 13. It is provided so as to be positioned between the device 22 and the lower limit stopper 23. The upper limit position fine adjustment device 22 is configured such that a screw shaft 25 having an adjustment handle 24 at the upper end is screwed into a nut portion 26 fixed to the installation frame 21 so as to be movable in the vertical direction. The lower limit stopper 23 is attached to the lower part of the installation frame 21 on the axis of the screw shaft 25 attached to the nut portion 26. It is not always necessary to restrict the raising / lowering (opening / closing) position of the lower roll 2 constituted by the lower adjustment lever 10, the upper limit position fine adjustment device 22 and the lower limit stopper 23. The rising position of the roll 2 can be adjusted according to the size of the line / bar-like material, and can be regulated to the distance between the upper and lower rolls 1 and 2 according to the size of the line / bar-like material. The wire / bar-shaped material can be conveyed with a more reliable reduction force.

  An opening / closing (elevating / lowering) cylinder 27 is attached between the opening / closing levers 11 and 12, and the lower swinging frame 8 swings up and down around the swinging shaft 15 by expansion and contraction of the opening / closing cylinder (pneumatic cylinder) 27. The lower roll 2 opens and closes (lifts) with respect to the upper roll 1. The open / close cylinder 27 is attached to the open / close levers 11 and 12 by pin-connecting the upper end of the cylinder rod 28 to the tip of the upper open / close lever 11 and provided on the outer bottom of the cylinder body 30 at the tip of the lower open / close lever 12. The bracket 31 is attached with a pin connection 32. Since the upper roll 1 is adjusted in position by the upper roll fine adjustment device 16 and is fixed in that position, the lower roll 2 is pivoted with respect to the upper roll 1 by extending the opening / closing cylinder 27. The lower roll 2 is lowered and opened around the center 15, and conversely contracted, whereby the lower roll 2 is lifted and closed with respect to the upper roll 1 around the swing shaft 15, and the lower roll 2 is opened and closed with respect to the upper roll 1. In the closing operation, the wire / rod-like material is transported by being sandwiched between the upper and lower rolls 1 and 2. In addition, 33 is an inlet guide provided on the entry side of the upper and lower rolls 1 and 2, and 34 is an outlet guide provided on the exit side of the upper and lower rolls 1 and 2.

  A drive unit 36 is attached to the ends of the rotary shafts 3 and 4 opposite to the upper and lower rolls 1 and 2 with universal spindles 35 and 35 interposed therebetween, respectively. The drive unit 36 is configured by connecting the output shaft of the drive motor 37 and the input shaft of the speed increaser 38 by a coupling 39, and the universal spindles 35, 35 are connected to the output shaft of the speed increaser 38. .

  The conveyance of the wire / bar-shaped material by the conveying apparatus configured as described above is performed as follows. That is, the level of the upper roll 1 is fixed by adjusting the level of the upper roll fine adjustment device 16 so that the conveyed wire / rod-like material passes through the position of the central axis of the entry / exit guides 33 and 34 (worm jack 17). The lower roll 2 is closed by reducing the opening / closing cylinder 27 and the hydraulic circuit is adjusted so that the rolling force of the lower roll 2 becomes a predetermined pressure. In addition, the upper limit position of the lower roll 2 is set by operating the upper limit position fine adjustment device 22 so as to be sandwiched with a predetermined margin. Next, the lower cylinder 2 is lowered by extending the open / close cylinder 27. Thereafter, in operation, when the wire / bar-shaped material passes through the entry / exit guides 33, 34, the open / close cylinder 27 is contracted to raise the lower roll 2, and the wire / bar-shaped material is sandwiched between the upper roll 1 from the bottom to the top. Wire and rod-shaped materials are transported. Note that, as described in the prior art section of Japanese Patent Laid-Open No. 9-323114, in general, in a transport device, the lower roll is fixed and the position of the upper roll is adjusted.

JP 9-323114 A

  In the case of a conveying line (conveying line is a single conveying line facility) for conveying a steel bar material when conveying the steel bar material with a steel bar conveying pinch roller device (hereinafter also simply referred to as a pinch roller device), As in the conventional conveying device, one single pinch roller device having a pair of upper and lower rolls for sandwiching and conveying a single steel strip may be installed.

  However, there is a transfer line (two transfer lines or four transfer line facilities) that simultaneously conveys two or four strips that have been slit-rolled, such as two-slit rolling or four-slit rolling. In such a case, as one of countermeasures, a plurality of single-pinch roller devices are arranged in tandem. For example, when two strip steel materials are conveyed simultaneously, two pinch roller devices 51 and 52 for a single strip are arranged in tandem as shown in FIG.

  In this case, as shown in FIG. 13, in the upstream pinch roller device 51, other strips pinched by the downstream pinch roller device 52 (sandwiched and imparted with conveying force) can pass. Therefore, the part (overhang part) from the roll drive shaft front end side bearing position to the roll in each of the upper and lower roll drive shafts connected to the upper and lower rolls becomes long. When the overhang portion is lengthened, it is necessary to make the roll drive shaft thick in order to ensure strength, and there is a disadvantage that the pinch roller device itself becomes large. Although it is conceivable to install the drive device on the opposite side of the steel bar in order to avoid lengthening the overhang portion, there are many disadvantages in terms of operability and roll exchange workability.

  Then, the subject of this invention is installed in the conveyance line which conveys several strips simultaneously, and makes a pair for carrying | intersecting and transporting one strip of the target conveyance line across other conveyance lines. In a pinch roller device for conveying steel bars having at least upper and lower rolls, a portion (overhang portion) from the roll drive shaft tip side bearing position to the roll in the roll drive shaft connected to each of the upper and lower rolls is to secure strength. A pinch roller device for conveying steel bars, which can be shortened so that the roll drive shaft does not need to be thickened, and the device can be avoided from becoming large due to the increase in diameter of the roll drive shaft. It is to provide.

  In order to solve the above problems, the present invention takes the following technical means.

  The invention of claim 1 is installed in a conveyance line that conveys a plurality of steel strips at the same time, and forms a pair of upper and lower for sandwiching and conveying one strip of the target conveyance line across the other conveyance lines The upper and lower roll drive shafts for transmitting the rotational driving force from the drive source to each of the rolls, wherein each of the upper and lower rolls is connected to the tip, and the roll An upper and lower bearing casing that includes a drive shaft front end side bearing and a roll drive shaft base end side bearing and rotatably supports each of the roll drive shafts, and extends perpendicularly to the other transport line; The roll drive shaft tip side bearing of each bearing casing is provided on the roll side with respect to the position of the other transport line in a plan view. It is.

  According to a second aspect of the present invention, there is provided the notch portion for securing a space for the conveyance line in the bearing casing so as not to interfere with the other conveyance line. Is provided on the side opposite to the roll from the position of the roll drive shaft tip side bearing of the bearing casing.

  The invention of claim 3 has a pair of upper and lower rolls in addition to the pair of upper and lower rolls, in addition to the pair of upper and lower rolls. Each of the upper and lower rolls includes a drive shaft unit for transmitting a driving force to each of the upper and lower rolls, and these two sets of drive shaft units are installed on one base frame, and further, the two sets of upper and lower rolls A swing shaft for raising and lowering each upper roll is shared by one, and a swing shaft for raising and lowering each lower roll is shared by one. .

  According to a fourth aspect of the present invention, there is provided the pinch roller device for conveying a steel bar according to the third aspect, wherein one motor as a drive source and a pinion that distributes the rotational driving force of the motor and transmits it to the two sets of drive shaft units. And a stand.

  The pinch roller device for conveying steel bars according to claim 1 is installed in a conveying line that conveys a plurality of steel bars simultaneously, and sandwiches and conveys one steel bar of the target conveying line across other conveying lines. In the pinch roller device for conveying steel bar having at least upper and lower rolls forming a pair of, a roll drive shaft front end side bearing and a roll drive shaft base end side bearing are provided, and a front end portion is connected to each of the upper and lower rolls. The upper and lower bearing casings rotatably support the upper and lower roll drive shafts, and the roll drive shaft tip side bearings of the respective bearing casings are provided on the roll side with respect to the positions of the other transport lines in plan view. ing. Accordingly, the portion (overhang portion) from the roll drive shaft tip side bearing position to the roll in each of the upper and lower roll drive shafts can be shortened so that the roll drive shaft does not need to be thickened to secure the strength. It can be avoided that the apparatus becomes large due to the increase in the diameter of the drive shaft.

  The pinch roller apparatus for conveying steel bars according to claim 2 is characterized in that a notch for securing a space for the conveying line in each bearing casing so as not to interfere with the other conveying line is provided on the roll of the bearing casing. It is provided on the side opposite to the roll from the position of the drive shaft tip side bearing. Therefore, in addition to the above-described effects, a space for the transport line can be secured so as not to interfere with the other transport lines without increasing the roll diameter of the upper and lower rolls.

  The pinch roller device for conveying steel bars according to claim 3 includes a drive shaft unit for transmitting a driving force to each of the upper and lower rolls for each of the two sets of upper and lower rolls. The swing shaft is installed on the base frame, and the swing shaft for raising and lowering the upper rolls of the two sets of upper and lower rolls is shared by one, and the lower rolls of the two sets of upper and lower rolls are raised and lowered. One swinging shaft is commonly used. Therefore, in the pinch roller device for transporting steel bars having two sets of upper and lower rolls, space saving of the device can be achieved.

  According to a fourth aspect of the present invention, the pinch roller device for conveying the steel bar is configured such that two sets of upper and lower rolls are simultaneously driven to rotate by using one motor as a drive source. Therefore, the device cost can be reduced.

It is a plane explanatory view for explaining the case where the pinch roller device for steel bar conveyance of the present invention is installed in the conveyance line of a plurality of bar steel materials, and (a) is installed in the conveyance line of two steel bars It is plane explanatory drawing in the case of being done, (b) is a plane explanatory drawing in the case of being installed in the conveyance line of 4 bars steel materials. It is a partial cross section top view which shows the pinch roller apparatus for a steel strip conveyance by one Embodiment of this invention, Comprising: It is a figure in the case of installing in the conveyance line of 2 bars | rods. FIG. 3 is a front view of the pinch roller device for conveying steel bars of FIG. 2. FIG. 3 is a partially cutaway side view of the steel bar conveying pinch roller device of FIG. 2. It is side surface sectional drawing which shows the principal part of the 1st upper and lower roll drive shaft and bearing casing in the pinch roller apparatus for a steel bar conveyance of FIG. It is a partial cross section top view which shows the case where the pinch roller apparatus for steel bar conveyance of FIG. 2 is installed in the conveyance line of 4 steel bars. It is side surface sectional drawing which shows the principal part of the 1st upper and lower roll drive shaft in FIG. 6, and a bearing casing. It is a side view of the conventional conveying apparatus. FIG. 9 is a top view of FIG. 8. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is plane explanatory drawing for demonstrating a prior art.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an explanatory plan view for explaining a case where the pinch roller device for conveying a steel bar of the present invention is installed in a conveying line for a plurality of bar steel materials, and (a) shows the conveyance of two steel bars. It is plane explanatory drawing in the case of installing in a line, The (b) is a plane explanatory drawing in the case of being installed in the conveyance line of 4 steel bars.

  In the embodiment described below, the pinch roller device 100 for conveying a steel bar of the present invention is a steel bar material as a steel bar material, and is installed in a two-line conveying line as shown in FIG. As a pair of upper and lower rolls for sandwiching and transporting one bar steel material so that two strips can be transported simultaneously, the first upper and lower rolls 111 and 112 and the second upper and lower roll 121 , 122 and two sets. In addition, as shown in FIG. 1B, two pinch roller devices 100 are arranged in tandem when installed on a four-line conveying line that simultaneously conveys four steel bars.

  FIG. 2 is a partial cross-sectional plan view showing a steel bar conveying pinch roller device according to an embodiment of the present invention. FIG. 3 shows a case where the steel bar is installed in a steel bar conveying line, and FIG. 4 is a front view of the conveying pinch roller device, and FIG. 4 is a partially cutaway side view of the steel bar conveying pinch roller device of FIG. In FIG. 4, the first upper and lower rolls, the lifting air cylinder, the stopper device, etc. in FIG. 2 are not shown.

  Reference numeral 101 denotes a base frame, and a single drive motor 102 as a drive source is mounted on a motor mounting frame 103 fixed to the upper surface of the base frame 101. Reference numeral 105 denotes a pinion stand fixed to the upper surface of the base frame 101. The pinion stand 105 has one drive-side pinion having an input shaft and four driven-side pinions each having an output shaft, and distributes the rotational driving force of the drive motor 102 to the four output shafts. To do. The input shaft of the pinion stand 105 is connected to the output shaft of the drive motor 102 by a coupling 104. Of the four output shafts of the pinion stand 105, two output shafts are connected to the first universal spindles 106 and 106, respectively, and the other two output shafts are respectively connected to the second universal shaft. It is connected to the spindles 107 and 107.

  The ends of the first universal spindles 106 and 106 on the side opposite to the pinion stand are respectively connected to the base ends of the first upper and lower roll drive shafts 113 and 114, and the first upper and lower roll drive shafts. The first upper and lower rolls 111 and 112 are attached to the tip portions of 113 and 114. Similarly, the end portions on the side opposite to the pinion stand of the second universal spindles 107 and 107 are connected to the base end portions of the second upper and lower roll drive shafts 123 and 124, respectively. Second upper and lower rolls 121 and 122 are attached to the tip ends of the roll drive shafts 123 and 124.

  The first upper and lower roll drive shafts 113 and 114 can be rotated by cylindrical first upper and lower bearing casings 115 and 116 having a roll drive shaft distal end side bearing 117a and a roll drive shaft proximal end bearing 117b, respectively. It is supported by. Similarly, the second upper and lower roll drive shafts 123 and 124 are respectively cylindrical second upper and lower bearing casings 125 and 126 each having a roll drive shaft distal end side bearing 127a and a roll drive shaft proximal end bearing 127b. Is supported rotatably. The first upper and lower bearing casings 115 and 116 and the second upper and lower bearing casings 125 and 126 are fixed to a roll drive shaft mounting frame 131 fixed to the upper surface of the base frame 101.

  The first universal spindles 106 and 106, the first upper and lower roll drive shafts 113 and 114, and the first upper and lower bearing casings 115 and 116 provide driving force to the first upper and lower rolls 111 and 112, respectively. A first drive shaft unit for transmission is configured. Similarly, the second universal spindles 107 and 107, the second upper and lower roll drive shafts 123 and 124, and the second upper and lower bearing casings 125 and 126 are connected to the second upper and lower rolls 121 and 122, respectively. A second drive shaft unit for transmitting the drive force is configured.

  An upper swing shaft 132 and a lower swing shaft 133 are rotatably supported on the roll drive shaft mounting frame 131. A swing frame attached to the first upper bearing casing 115 and a swing frame attached to the second upper bearing casing 125 are fixed to the upper swing shaft 132, and the first swing bearing 132 is fixed to the first swing bearing casing 115. This is a shaft that is the center of swinging of each swinging frame for moving up and down the upper roll 111 and the second upper roll 121. Similarly, a swing frame attached to the first lower bearing casing 116 and a swing frame attached to the second lower bearing casing 126 are fixed to the lower swing shaft 133, and This is a shaft that is the center of swing of each swing frame for moving the first lower roll 112 and the second lower roll 122 up and down.

  Reference numeral 118 denotes a first stopper device for setting the lower limit of the first upper roll 111 and the upper limit of the lower roll 112 so that the steel bar is clamped at a predetermined clamping margin. Reference numeral 119 denotes a first lifting / lowering air cylinder for raising the lower roll 112 relative to the first upper roll 111 to sandwich the bar steel material.

  Similarly, 128 is a second stopper device for setting the lowering limit of the second upper roll 121 and the rising limit of the lower roll 122 so that the bar steel material is clamped at a predetermined clamping margin. Reference numeral 129 denotes a second lifting / lowering air cylinder for raising the lower roll 122 relative to the second upper roll 121 to sandwich the steel bar material. The first stopper device 118 and the first lifting / lowering air cylinder 119 and the second stopper device 128 and the second lifting / lowering air cylinder 129 are installed opposite to each other as shown in FIG. (The first stopper device 118 and the lifting air cylinder 119 are disposed upstream of the roll drive shafts 113 and 114, while the second stopper device 128 and the lifting air cylinder 129 are driven by a roll. (It is arrange | positioned downstream with respect to the axis | shafts 123 and 124. That is, it arrange | positions left-right symmetrically by front view (FIG. 3).).

  Reference numeral 141 denotes a guide pipe that constitutes the transport line. The steel bar is guided through the guide pipe 141 disposed on the entry side (upstream side) of the first upper and lower rolls 111 and 112, and is pinched (sandwiched) by the rolls 111 and 112. Is provided) and is conveyed downstream in the next guide pipe 141 disposed on the outlet side (downstream side). Similarly, 142 is a guide pipe constituting another (another) transport line. The steel bar is guided through the guide pipe 142 disposed on the entry side of the second upper and lower rolls 121 and 122, pinched by the rolls 121 and 122, and the next guide pipe 142 disposed on the exit side. The inside is conveyed downstream. As shown in FIG. 2 and FIG. 5 to be described later, the distance between the two transport lines is 280 mm in this embodiment.

  In the rolling production of steel bars, generally, in the production of thick steel bars, productivity is good. Therefore, “one pass” is performed to roll only one thick steel bar. In the manufacture of steel bars, in order to increase productivity, “two-line” is performed in which a thin steel bar is rolled into a plurality of strips, such as two strips and four strips, for example, two strips simultaneously. The steel bar conveying pinch roller device 100 of this embodiment can be used for the “single thread”, and the guide pipe 142 is for the case of the “single thread”. . The induction pipe is exchanged according to the thickness of the steel bar.

  FIG. 5 is a side cross-sectional view showing the main parts of the first upper and lower roll drive shafts and the bearing casing in the steel bar conveying pinch roller device of FIG. 2.

  As shown in FIG. 5, an inner cylinder 111 a for roll attachment is fixed to the first upper roll 111 integrally with the upper roll 111 by cold fitting. The first upper roll 111 is fixed to the tip end portion of the first upper roll drive shaft 113 by a key 113b with a taper sleeve 113a for roll centering interposed therebetween. Similarly, an inner cylindrical body 112a for roll attachment is fixed to the first lower roll 112 integrally with the lower roll 112 by cold fitting. The first lower roll 112 is fixed to the tip of the first lower roll drive shaft 114 by a key 114b through a taper sleeve 114a for roll centering.

  Then, the first upper and lower roll drive shafts 113 and 114 have the position of the roll drive shaft tip side bearing 117a in the plan view as the position of the other transport line by the guide pipe 142 (the second upper and lower rolls 121 and 114). The position of the overhang portion OH, which is a portion from the front end side bearing 117a to each of the rolls 111 and 112, is secured by moving closer to the first upper and lower rolls 111 and 112 side than the position 122) (see FIG. 2). Therefore, the roll drive shafts 113 and 114 are shortened so as not to be thickened.

  In this case, when the length of the overhang portion OH is shortened, the thick pipe guide pipe 142 used for the “one pass” is used for the steel bar material conveying line by the second upper and lower rolls 121 and 122. If it tries to arrange | position, the 1st upper and lower bearing casings 115 and 116 and the said induction pipe 142 will interfere, and the said induction pipe 142 cannot be arrange | positioned.

  Therefore, a space for the conveying line, in this embodiment, the guide pipe so as not to interfere with the conveying line of the steel bar material conveyed by the second upper and lower rolls 121 and 122 to the first upper and lower bearing casings 115 and 116. As shown in FIG. 5, notches 115a and 116a for securing a space for arranging 142 are provided on the side opposite to the roll from the roll drive shaft front end side bearing 117a. As a result, the notches 115a and 116a can be made large without being restricted by the outer diameter of the roll drive shaft front end bearing 117a. In addition, the cutout portions 115a and 116a are formed by cutting out a part (about 1/6 to 1/5) of the outer circumference of the upper and lower bearing casings 115 and 116, and the thickness of the cutout portions 115a and 116a is reduced. The strength of the upper and lower bearing casings 115 and 116 is not adversely affected. In FIG. 5, S indicates the size (outer diameter) of the steel bar guided inside the guide pipe 141, and S ′ indicates the size (outer diameter) of the steel bar guided inside the guide pipe 142. Yes.

  As described above, the pinch roller device 100 for conveying the steel bar of the present embodiment is installed in the conveying line that simultaneously conveys the two steel bars, and extends over the other conveying line by the guide pipe 142. It has at least a pair of upper and lower rolls 111 and 112 for sandwiching and conveying a steel bar material, and has a roll drive shaft distal end side bearing 117a and a roll drive shaft proximal end bearing 117b, Upper and lower bearing casings 115 and 116 rotatably supporting upper and lower roll drive shafts 113 and 114 having tips connected to the rolls 111 and 112, and the roll drive shaft tips of the bearing casings 115 and 116, respectively. The side bearing 117a is provided on the roll side with respect to the position of the other transport line in plan view.

  Therefore, the overhang portion OH from the position of the roll drive shaft tip side bearing 117a to the rolls 111 and 112 in the upper and lower roll drive shafts 113 and 114 is shortened so that the roll drive shaft does not need to be thickened to ensure strength. It is possible to avoid the fact that the apparatus becomes large due to the increase in diameter of the roll drive shaft.

  Further, the steel bar conveying pinch roller device 100 of the present embodiment rotatably supports the roll drive shafts 113 and 114, and the upper and lower bearing casings 115 and 116 extending perpendicularly to the other conveying lines Notches 115a and 116a are provided for securing a space for other transport lines. Therefore, in addition to the above-described effects, a space for the transport line can be secured so as not to interfere with the other transport lines without increasing the roll diameter of the upper and lower rolls 111 and 112.

  Moreover, the pinch roller device 100 for conveying steel bars according to the present embodiment includes the drive shaft unit for transmitting the driving force to the upper and lower rolls for the two upper and lower rolls 111, 112 and 121, 122, respectively. These two sets of the drive shaft units are installed on one base frame 101, and the swing shaft 132 for raising and lowering the upper rolls 111 and 121 of the two sets of upper and lower rolls is shared by one. In addition, the swing shaft 133 for raising and lowering the lower rolls 112 and 122 of the two sets of upper and lower rolls is shared by one. Therefore, in the pinch roller device for transporting steel bars having the two sets of upper and lower rolls, space saving of the device can be achieved.

  Furthermore, the strip conveying pinch roller device 100 of the present embodiment is configured to simultaneously drive the two sets of upper and lower rolls by using one drive motor 102 as a drive source. Therefore, the device cost can be reduced.

  FIG. 6 is a partial cross-sectional plan view showing a case where the steel bar conveying pinch roller device of FIG. 2 is installed in a steel bar material conveying line of four steel bars, and FIG. 7 is a schematic diagram of the first upper and lower roll drive shafts in FIG. It is side surface sectional drawing which shows a part.

  As shown in FIGS. 6 and 7, in order from the left side in both figures, a steel steel material conveying line pinched by the first upper and lower rolls 111, 112, a conveying line constituted by a guide pipe 143, the second In this embodiment, a conveying line composed of a steel bar material pinched by the upper and lower rolls 121 and 122 and a conveying line composed of a guide pipe 144 are provided at intervals of 140 mm. As described above, when the bar steel conveying pinch roller device 100 according to the present embodiment is installed in a four-line conveying line that simultaneously conveys four steel bars, two units are arranged in tandem. (See FIG. 1 (b)).

DESCRIPTION OF SYMBOLS 100 ... Pinch roller apparatus for steel strip conveyance 101 ... Base frame 102 ... Drive motor 103 ... Motor mounting frame 104 ... Coupling 105 ... Pinion stand 106 ... First universal spindle 107 ... Second universal spindle 111, 112 ... First Upper and lower rolls 111a, 112a ... inner cylinders 113, 114 ... first upper and lower roll drive shafts 113a, 114a ... taper sleeves 113b, 114b ... keys 115, 116 ... first upper and lower bearing casings 117a ... tip of the roll drive shaft Side bearing 117b ... Roll drive shaft proximal end bearing 118 ... First stopper device 119 ... First lifting air cylinder 121, 122 ... Second upper and lower rolls 123, 124 ... Second upper and lower roll drive shaft 125 126, second upper and lower bearing casings 127a ... Roll drive shaft tip side bearing 127b ... Roll drive shaft base end side bearing 128 ... Second stopper device 129 ... Second lift air cylinder 131 ... Roll drive shaft mounting frame 132 ... Upper swing shaft 133 ... Downward swing Driving shaft 141-144 ... induction pipe

Claims (4)

A steel bar transport that is installed in a transport line that transports a plurality of steel strips simultaneously and has at least a pair of upper and lower rolls for sandwiching and transporting one steel bar of the target transport line across another transport line. In the pinch roller device for
Each of the upper and lower rolls is connected to the tip, and the upper and lower roll drive shafts that transmit the rotational driving force from the drive source to each of the rolls, the roll drive shaft tip side bearing and the roll drive shaft base end side bearing And each of the roll drive shafts is rotatably supported, and includes upper and lower bearing casings extending perpendicularly to the other transport lines, and the roll drive shaft front end side bearings of the respective bearing casings, A pinch roller device for conveying steel bars, which is provided on the roll side with respect to the position of the other conveying line in a plan view.   In each bearing casing, a notch for securing a space for the transfer line so as not to interfere with the other transfer line is located on the side opposite to the roll than the position of the roll drive shaft tip side bearing of the bearing casing. The pinch roller device for transporting steel bars according to claim 1, wherein the pinch roller device is provided on the bar.   In addition to the pair of upper and lower rolls, there is a pair of upper and lower rolls, and for these two sets of upper and lower rolls, a drive shaft unit for transmitting driving force to the upper and lower rolls, respectively. These two sets of drive shaft units are installed in one base frame, and the swing shaft for raising and lowering the upper rolls of the two sets of upper and lower rolls is shared by one, 3. A pinch roller device for conveying steel bars according to claim 1 or 2, wherein a single pivot shaft for raising and lowering each lower roll is shared.   The steel bar conveying pinch according to claim 3, comprising a motor as a driving source and a pinion stand that distributes the rotational driving force of the motor and transmits it to the two sets of driving shaft units. Roller device.

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