JPH05111728A - Device for restricting rod like stock - Google Patents

Abstract

PURPOSE:To always restrict a rod like stock in the same feeding level. CONSTITUTION:A table 18 is arranged freely movable upward and downward between a pair of fixed frames 20, 20 through an elevating and lowering device 28. The table 18 is moved up and down in an allowable range of a hydraulic cylinder 42. Supporting levers 48, 48 being mutually approaching and separating following to the upward and downward movement of the above table 18 are supported with pivot to the table 18. Restricting walls 44, 44 are arranged parallel inserting a stock feeding line at end parts of the supporting levers 48, 48 facing to the upper direction of the table 18. The rod like stock 12 mounted with feeding rollers 14 is elevated with the table 18 and restricted by mutually approaching the opposing restricting walls 44, 44 due to the elevation of the table 18 from the waiting position to the restricting position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is based on the rotation of a rod-shaped material when the rod-shaped material is bent by a straightening machine in a subsequent process to prevent the bending which is inevitable when the rod-shaped material is rolled to a required diameter in a rolling process. The present invention relates to a rod-shaped material restraining device capable of effectively restraining the tail end swinging and suppressing the generation of noise and flaws during straightening.

[0002]

2. Description of the Related Art A long round bar steel material having a circular cut surface (hereinafter referred to as "bar-shaped material") is a bar having a required diameter obtained by sequentially passing the material through a number of rolling rolls in a rolling process and gradually converging its diameter. It is a material. However, the obtained rod-shaped material inevitably causes bending such as warpage due to plastic deformation during rolling, and in many cases cannot be put to practical use as it is. Therefore, in order to straighten this rod-shaped material into a straight bar, it is passed through a straightening machine arranged downstream of the rolling process. As this straightening machine, various types have been proposed according to the purpose of straightening, but in order to straighten the bending of the round bar, generally an inclined roll straightening machine with the axial centers intersecting at a required angle is often used. There is. In this case, since the object to be straightened is a long rod-shaped material, conventionally, a multi-stage inclined roll type straightening machine in which a large number of staggered rolls are arranged vertically is preferably used.

[0003]

As described above, when a rod-shaped material having a bend in the rolling step is passed through the straightening machine to straighten and remove the bend, the following problems have been encountered. Was there. That is, when the rod-shaped materials are fed to the straightening machine one by one and the feed-side end is gripped by the straightening roll, the rod-shaped materials are given rotation in the circumferential direction. At this time, since the rod-shaped material is long, the trailing end of the rod-shaped material largely swirls as the material rotates (so-called tail swing phenomenon). As a result, the tail end of the rod-shaped material is
This may hit the conveying roller irregularly to generate a large amount of noise and cause a flaw on the surface of the material.

Further, since the tail swing phenomenon becomes greater as the material to be straightened is supplied to the straightening machine at a high speed, the material can inevitably be supplied at a low speed. Moreover, if the rod-like material is left unrestrained without being restrained, the bending cannot be sufficiently corrected by passing the rod-shaped material through the straightening machine only once. Therefore, using a multi-stage inclined roll type straightener equipped with a pair of upper and lower straightening rolls in multiple stages, straightening is performed step by step. This means that the production time is reduced due to an increase in loss time in the straightening process. Means In addition, this multi-roll type straightening machine requires an independent rotary drive device for each pair of straightening rolls, and thus has a drawback of increasing manufacturing costs and running costs.

In order to deal with this, for example, the invention "constraint device for rod-shaped material" proposed by the applicant of the present application (Japanese Patent Application No. Sho 6).
0-266573). This device has opposing walls having a pair of walls sandwiching a transportation path of a rod-shaped material that is transported toward a straightening machine, and restraining claws are alternately extended to face the lower portions of the respective walls. .. Then, by moving the pair of walls close to each other at the timing when the rod-shaped materials enter the straightening machine, the rod-shaped materials can be restrained to prevent the tail swinging phenomenon, which can be highly evaluated as such. Is.

However, in the restraint device, when the diameter of the rod-shaped material is changed due to order change or the like, the feeding level of the material restrained by the restraining claws changes. That is, when there is a difference between the material feeding level that allows smooth feeding to the straightening machine and the material feeding level of the material that is restrained by the restraining claws, especially when the material diameter changes significantly, There is a risk that smooth feeding of the rod-shaped material to the straightener may be hindered. Further, since the restraining claws are provided at a predetermined distance in the material feeding direction, a gap is inevitably formed between the restraining claws adjacent to each other. For this reason, when the trailing end of the rotating rod-shaped material hits the end of the restraining claw, the trailing end may enter the gap and be greatly bent, which may make correction impossible.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned drawbacks inherent in the above-mentioned restraint device, and is proposed in order to solve the above-mentioned drawbacks.
An object of the present invention is to provide a restraint device capable of preventing the bending of the trailing end of a rod-shaped material without changing the material feeding level to the straightening machine.

[0008]

[Means for Solving the Problems] Overcoming the above-mentioned problems,
In order to preferably solve the intended purpose, the present invention provides a device for restraining a rod-shaped material fed to a straightening machine, which is parallel along a feeding line toward the straightening machine of the rod-shaped material. And is moved up and down by the required drive means,
A table that can be selectively positioned between a restraining position that coincides with the material feeding level and a standby position below the feeding level, and a table that is pivotally supported to face the table while sandwiching the table, and as the table moves up and down. Support levers that move toward and away from each other, and a pair of constraining walls that are disposed along the table at the end portions of the respective support levers that face above the table and that face each other across the feeding line. It is composed of an opening adjustment device connected to the other end of each of the support levers and adjusting the opening between the two restraint walls. By moving the pair of restraint walls closer to each other by moving upward toward the feeding level, the rod-shaped material is restrained by the raised table and the pair of restraint walls that have moved closer together. To.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a rod-shaped material restraining device according to the present invention will be described in detail below with reference to the accompanying drawings, with reference to preferred embodiments. FIG. 1 is a vertical sectional front view showing the main configuration of a restraint device according to an embodiment, and FIG. 4 is an explanatory plan view showing a state in which a plurality of restraint devices are arranged on the upstream side of a straightening machine.

In FIG. 4, reference numeral 10 is a rod-shaped material 1.
2 shows a straightening machine for straightening two bends, and preferably an inclined two-roll straightening machine is used. Upstream of the straightening machine 10, a plurality of feeding rollers 14 in a zigzag shape are arranged at a predetermined interval in the material feeding direction. For example, one rod-shaped material 12 carried out from a rolling process (not shown) is fed to the feeding rollers 14. They are carried one by one and transported toward the straightening machine 10. The restraint device 16 according to the embodiment is arranged between the transport rollers 14 and 14 and operates at the timing when the tip of the rod-shaped material 12 is inserted into the straightening machine 10 to restrain the rod-shaped material 12. To be done. The number of the restraint devices 16 (5 in the embodiment) is set according to the length of the rod-shaped material 12 to be straightened.

(Regarding Table) As shown in FIG. 1, a pair of supporting tables 18 in a restraint device 16 as a single unit are provided on the left and right sides of the feeding line for the rod-shaped material 12 conveyed by the conveying rollers 14. The fixed frames 20, 20 are arranged opposite to each other. As shown in FIG. 2, the table 18 includes a support plate 22 that supports the rod-shaped material 12 and a plurality of (five in the embodiment) vertically provided on the lower surface of the support plate 22 at a predetermined distance in the feeding line direction. The stay 24 and the bottom plate 26 arranged at the lower end of the stay 24 are basically configured. Then, the table 18 is moved up and down in parallel by an elevating device 28 (described later) connected to the bottom plate 26, and the support plate 22 is moved to a restraining position above the carrying surface of the transport roller 14 and a standby position below the carrying surface. It is designed to be selectively positioned. The support plate 22 is
Conveying rollers 14 and 1 located on both sides of the restraint device 16
The length is set so as not to interfere with No. 4.

(Regarding Table Elevating Device) As shown in FIG. 2, a pair of fixed shafts 30, 30 are arranged in parallel with each other in the fixed frame 20, 20 at a predetermined interval in the feeding line direction. An elevating lever 32 having a V shape is rotatably supported on the fixed shaft 30. As shown in FIG. 1, one arm portion 32a pointing upward of each lifting lever 32 is
It is rotatably connected to a pair of brackets 34, 34 hung on the bottom plate 26 of the table 18 via pins 36. Further, the arm portions 32b, 32b pointing downward of the elevating levers 32, 32 are commonly pivotally supported by a connecting rod 40 via pins 38, respectively. Further, a piston rod 42a of a hydraulic cylinder 42 arranged between the fixed frames 20, 20 is connected to one end of the connecting rod 40 in the longitudinal direction. Therefore, by urging the hydraulic cylinder 42 in the forward and reverse directions, the pair of elevating levers 32, 32 rotate in the forward and reverse directions via the connecting rod 40, and the table 18 moves up and down while maintaining the horizontal state. ..

The table 18 moves up and down within an allowable stroke of the hydraulic cylinder 42, and unless the stroke is changed, the table 18 is at the highest position.
(Restriction position) does not change. As a result, as will be described later,
Even if the diameter of the rod-shaped material 12 is changed,
The feeding level of the rod-shaped material 12 placed on the table 18 is kept constant. As mentioned above, Table 1
The material support surface of the support plate 22 in FIG.
The restraining position (FIG. 1) above the carrying surface and the standby position (FIG. 5) below the carrying surface are selectively positioned. Then, in the process in which the support plate 22 rises from the standby position to the restrained position, the rod-shaped material 12 carried by the carrying roller 14 is lifted upward from the carrying surface.

Here, the hydraulic cylinder 42 of each restraint device 16 arranged upstream of the straightening machine 10 has a rod-shaped material 12
Are transported by the transport roller 14 and are operated synchronously when the tip of the transport roller 14 enters the straightening machine 10 to raise the table 18 from the standby position to the restraining position. Further, when the rod-shaped material 12 is fed to the straightening machine 10 and its tail end is separated from the restraint device 16, the restraint device 1 concerned.
Only the hydraulic cylinder 42 of No. 6 operates to lower the table 18 from the restrained position to the standby position. It should be noted that the lifting / lowering drive means for the table 18 is not limited to the hydraulic cylinder 42, and an air cylinder, a motor, or the like can be appropriately adopted.

(Regarding Restraint Wall) Above the support plate 22 of the table 18, as shown in FIGS. 1 and 3,
A pair of restraint walls 44, 4 at left and right positions sandwiching the material feeding line
4 face each other, and both restraint walls 44, 44 are the table 18
It is configured to move close to and away from each other as it moves up and down. The configurations related to the restraint walls 44, 44 arranged on the left and right sides of the table 18 are almost the same, so that only the structure relating to the restraint wall 44 on the left side in FIG. Corresponding parts include
The same reference numerals are given and detailed description is omitted.

As shown in FIG. 2, four openings 46 intersecting with the feeding line are formed between the five stays 24 arranged between the support plate 22 and the bottom plate 26 in the table 18, as shown in FIG. The left restraint wall 44 and the right restraint wall 4 are provided in the opening 46.
4 support levers 48 are alternately inserted, and the central portion thereof is rotatably supported by a support pin 50. Then, the restraining wall 4 is attached to the supporting levers 48, 48 forming a set with two pieces.
4 are arranged.

That is, the arm portions 48a, 4 extending upward
8a is a support lever 48, 48 facing the left side of the table 18.
At the ends of the arms 48a, 48a that face the support plate 22, a restraint wall 44 is provided along the support plate 22 as shown in FIG. Then, the constraining walls 44, 44 facing each other
The support plate 22 restrains the tail end swinging of the rod-shaped material 12. In addition, each support lever 48
The arm portion 48b extending downward is pivotally supported by a positioning pin 54 of an opening adjustment device 52 described later.

As described above, the intermediate point of the support lever 48 on the restraint wall 44 is pivotally supported on the table 18 via the support pin 50, and the arm portion 48b extending downward is pivotally supported on the positioning pin 54. As the table 18 moves up and down, the support lever 48 rotates in the forward and reverse directions about the support pin 50 (see FIGS. 1 and 5). As a result, the pair of restraint walls 44, 4 facing above the support plate 22.
Reference numeral 4 is for moving close to and away from each other. Then, when the table 18 reaches the restraining position, the restraining walls 44, 44 come close to each other and restrain the rod-shaped material 12.
(See FIGS. 9 and 11).

As shown in FIG. 1, one restraint wall 44 is provided with an upper restraint plate 56 which covers an upper part of a space defined by the restraint walls 44, 44 when the table 18 reaches the restraint position. It is arranged. This upper regulation plate 56 is shown in FIG.
As shown in Fig. 5, five restraint devices 1 arranged in the material feeding direction
6, the installation side (left restraint wall 44 or right restraint wall 44)
Are set to appear alternately.

(Regarding Opening Adjusting Device of Restraining Wall) An opening adjusting device 52 of each restraining wall 44 is arranged outside the fixed frames 20 and 20, and the position of the positioning pin 54 is adjusted by the adjusting device 52. By adjusting the elevation of the table 18, both the restraint walls 44, 4 when the table 18 reaches the restraint position.
It is configured so that the interval (opening) of 4 can be adjusted. Further, since the configurations of the opening degree adjusting devices 52, 52 arranged on the left and right are the same, only the adjusting device 52 of the left restraint wall 44 will be described, and the other adjusting device 52 will be denoted by the same reference numeral. The description is omitted.

As shown in FIG. 6, a common shaft 60 is pivotally supported on the fixed frame 20 through a bearing 58, and the common shaft 60 is supported by all the restraint devices 16 arranged upstream of the straightening machine 10. It extends along and functions to adjust the opening of all the restraint walls 44 on the corresponding side (for example, the left side). An adjusting lever 62 is integrally rotatably arranged on the common shaft 60, and the lower end of the first movable member 64 is pin-connected to the end of the lever 62 that faces the table 18. The lower arm portion 48b of the support lever 48 is pivotally supported on the upper end portion of the first movable member 64 via a positioning pin 54.

The outside of the adjusting lever 62 (table 18
The upper end of the second movable member 66 is pin-connected to the other end of the second movable member 66, and the lower end of the movable member 66 is pin-connected to the upper end of the elevating shaft 68.
Further, a gear box 72 is arranged on a support base 70 arranged outside the fixed frame 20, and a worm wheel 74 is rotatably arranged in the gear box 72 in a state where the worm wheel 74 is restricted from moving up and down. Center hole of this worm wheel 74
A female screw (not shown) is formed, and a male screw 68a formed on the elevating shaft 68 is screwed and inserted into the female screw hole.

Further, a worm 76 meshing with the worm wheel 74 is rotatably supported by the gear box 72,
The worm 76 is rotationally driven by a motor 78 in forward and reverse directions. That is, when the motor 78 is driven to rotate the worm wheel 74 in either forward or reverse directions, the female screw hole and the male screw 68a are screwed together,
The elevating shaft 68 moves up and down. As a result, the adjusting lever 62 rotates about the common shaft 60, and the positioning pin 54 moves up and down. Then, by changing the position of the positioning pin 54, as shown in FIGS. 9 and 11, the rotation angle of the support lever 48 is changed, and the opening degrees of both the restraint walls 44, 44 are adjusted. Is. Since the common shaft 60 also rotates integrally with the rotation of the adjustment lever 62, the restraint walls 4 in all the restraint devices 16 are not rotated.
The opening degree of 4,44 is adjusted synchronously.

(Regarding the degree of opening setting means) In the restraint device 16 according to the embodiment, the degree of opening of the restraint walls 44, 44 can be adjusted in four steps according to the diameter of the rod-shaped material 12. That is, as shown in FIGS. 6 and 7, four dogs 80 are arranged in parallel at appropriate positions on the elevating shaft 68 via brackets 84, and the respective lower ends of the dogs 80 are set so as to have different lower end levels. There is. Further, four detecting means 82 capable of detecting the lower end of each dog 80 are arranged at the same horizontal level, and drive the motor 78 when each detecting means 82 detects the lower end of the corresponding dog 80. It is set to stop. That is, by operating only the detection means 82 at the predetermined position, the motor 78 is stopped and controlled when the detection means 82 detects the corresponding dog 80, and the opening degrees of the restraint walls 44, 44 are set.

Since the dog 80 is constructed so that it can be finely adjusted in the vertical direction with respect to the bracket 84, the optimum opening can be set according to the diameter of the rod-shaped material 12. In addition, by increasing the number of dogs 80 and the number of detecting means 82 provided, it is possible to make the opening setting interval finer. A rotation detector such as an encoder for detecting the rotation of the motor 78 is provided in place of the opening setting means by the dog 80 and the detection means 82, and the positioning pin 54 is based on the rotation signal from the rotation detector. May be positioned (opening degree adjustment).

[0026]

Next, the operation of the rod-shaped material restraining device thus constructed will be described. A rod-shaped material 12 which is sequentially rolled in a rolling process (not shown) to form a round bar having a predetermined diameter.
Are fed one by one onto the straightening machine 10 shown in FIG. 4 through a feeding device such as a walking beam and on the transport rollers 14. At this time, the five restraint devices 16 arranged upstream of the straightening machine 10 make the support plate 22 of the table 18 face the standby position below the carrying surface of the transport roller 14 as shown in FIG. , 44 are opened to allow the conveyance roller 14 to convey the rod-shaped material 12.

The rod-shaped material 12 that is straightened by the straightening machine 10 has various diameters depending on the application. Therefore, before using the restraint device 16, it is necessary to adjust the opening degree of the restraint walls 44, 44 according to the diameter peculiar to the rod-shaped material 12. That is, by driving the motor 78,
The common shaft 60 is rotated in a required direction, and the positioning pin 54 pivotally supported on the first movable member 64 is moved up and down via an adjusting lever 62 that is integrally rotatably arranged on the common shaft 60. When the preset arbitrary detecting means 82 detects the corresponding dog 80, the motor 78 is stopped and the positioning pin 54 is positioned. As a result, the opening degree of the restraint walls 44, 44 is adjusted. It For example, rod-shaped material 12
If the diameter is small, the positioning pin 54
Are positioned close to the common axis 60. As a result, when the table 18 is raised, as shown in FIG.
The opening degree of the constraining walls 44, 44 facing each other is set to be narrow. When the rod-shaped material 12 has a large diameter, as shown in FIG.
The positioning pin 54 is positioned at a position spaced upward from the common shaft 60. As a result, when the table 18 is raised, as shown in FIG.
The opening degree of is set wide.

The timing at which the rod-shaped material 12 is fed to the upper and lower straightening rolls provided in the straightening machine 10 is detected by a photoelectric detector (not shown) composed of, for example, a photocell,
An operation command is given to the hydraulic cylinder 42 of each restraint device 16 described above via an electric control circuit system. As a result, the hydraulic cylinder 42 is pressure-biased, and the piston rod 42a
Is pulled into the barrel, and the raising and lowering levers 32, 32 are rotated counterclockwise via the connecting rod 40 (see FIG. 2) to move the table 18 upward while maintaining the horizontal posture.

As the table 18 is lifted, the rod-shaped material 12 carried on the conveying rollers 14 is transferred to the support plate 22 of the table 18 and reaches a restraining position slightly above, as shown in FIG. 9 or 11. To be lifted. Further, as the table 18 rises, the support levers 48, 48 of the restraint walls 44, 44 rotate in opposite directions about the support pins 50, 50, and the rod-shaped material 12 transferred to the support plate 22 is moved. The restraining walls 44, 44 restrain the same from both sides. At this time, since the rod-shaped material 12 is not fixedly held by the both constraining walls 44, 44, the rod-shaped material 12 is
The straightening machine 1 is gripped by a straightening roll (not shown).
It is drawn in and supplied as it is. Also, table 18
The highest position, that is, the restraint position, is shown in FIG. 9 and FIG.
Since it is always constant as shown in FIG. 4, the feeding level of the rod-shaped material 12 does not change each time the diameter of the rod-shaped material 12 is changed, and thus smooth feeding to the straightening device 10 can be achieved. ..

When the rod-shaped material 12 is supplied to the straightening machine 10 and its trailing end is separated from each restraint device 16, an appropriate detecting means (not shown) arranged in each restraint device 16 is provided.
The table 18 is lowered to detect the
4, 44 are opened to allow the next rod-shaped material 12 to be carried in. That is, in the state where the rod-shaped material 12 is being fed to the straightening machine 10, the restraint device 16 on the upstream side sequentially holds the restraint wall 4.
Since 4, 44 are opened, it is not necessary to wait for the next rod-shaped material 12 to be loaded until the rod-shaped material 12 being straightened passes through the straightening machine 10, and the material loading interval can be set short.

[0031]

As described above, according to the rod-shaped material restraint device of the present invention, the rod-shaped material is rotated in the circumferential direction at the moment it is fed into the straightening machine, and due to its bending, the material is bent. Although the trailing end of the trailing edge of the table swings, the turning range of the trailing edge is significantly restricted due to the rising of the table and the mutual proximity of the pair of restraining walls. As a result, the tail swing phenomenon is reliably suppressed, and the occurrence of noise and flaws is significantly reduced. Further, the tail swing impact force can be reduced, so that the machine life can be extended. Moreover, since the table and the constraining wall extend over a predetermined length in the longitudinal direction of the rod-shaped material, it is possible to effectively prevent the tail end of the rod-shaped material from bending as in the conventional case.

Further, since the table is always positioned at the same position even when the diameter of the rod-shaped material is changed, the feeding level of the rod-shaped material is always constant, and the table is straightened to the straightener. It is possible to achieve smooth feeding.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a state in which a table in a restraint device according to an embodiment faces a restrained position.

2 is a side view of the restraint device shown in FIG. 1. FIG.

FIG. 3 is a plan view of the restraint device shown in FIG.

FIG. 4 is an explanatory plan view showing a state in which a plurality of restraint devices are arranged upstream of the straightening machine.

FIG. 5 is a vertical cross-sectional front view showing a state in which the table of the restraint device according to the embodiment faces the standby position.

FIG. 6 is a vertical cross-sectional front view of essential parts showing a device for adjusting the opening degree of a restraint wall.

FIG. 7 is an explanatory view showing a means for setting the opening degree of the restraint wall.

FIG. 8 is an explanatory diagram showing a state before a rod-shaped material having a relatively small diameter is restrained by a table and a restraining wall.

FIG. 9 is an explanatory diagram showing a state in which a rod-shaped material having a relatively small diameter is constrained by a table and a constraining wall.

FIG. 10 is an explanatory diagram showing a state before a rod-shaped material having a relatively large diameter is restrained by a table and a restraining wall.

FIG. 11 is an explanatory diagram showing a state in which a rod-shaped material having a relatively large diameter is constrained by a table and a constraining wall.

[Explanation of symbols]

 10 Straightening Machine 12 Rod-shaped Material 18 Table 42 Hydraulic Cylinder 44 Restraint Wall 48 Support Lever 52 Opening Adjustment Device

Claims (1)

[Claims] 1. A rod-shaped material fed toward a straightening machine (10).
A device for restraining (12), which extends in parallel along a feed line of the rod-shaped material (12) toward the straightening machine (10), and is vertically moved by a required driving means (42). Table (18) capable of selectively positioning between a restrained position corresponding to the material feeding level and a standby position below the feeding level, and a table (18) opposed to the table (18) with the table (18) interposed therebetween. And the supporting levers (48, 48) that move toward and away from each other as the table (18) moves up and down, and the table at the end of each of the supporting levers (48) facing above the table (18). A pair of constraining walls (44, 44) arranged along (18) and facing each other across the feeding line, and connected to the other end of each of the support levers (48), and both constraining walls An opening adjustment device (52) for adjusting the opening between (44, 44), and the tape-shaped material (12) is inserted into the straightening machine (10) at the timing. By moving the bull (18) upward toward the material feeding level, the pair of restraint walls (44, 44) are moved closer to each other, and the raised table (18) and the pair of restraint walls (44) moved closer to each other. , 44) for restraining the rod-shaped material (12).