JPH0641044B2 - Bar material steady rest - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar material steady rest, and more particularly to a device for preventing rotational runout of a bar material supplied from a bar material feeder to a bar material processing machine.

(Prior Art) When a bar material is processed by a bar material processing machine, the bar material is rotated at a considerably high rotational speed, so that a rotational runout occurs once especially in the case of a large diameter bar material having a large weight. Therefore, the processing accuracy of the product is deteriorated, and the bar material processing machine and the bar material supply machine are damaged or a worker is in danger. Therefore, the bar material must be effectively supported so as to prevent vibration as much as possible.

Japanese Patent Application No. 60-213383 proposes a bar material steady rest device for effectively preventing rotational runout of the bar material. This bar material steady rest has a vibration absorbing effect by forming the outer periphery of the bar material supporting roller with an elastic member, and also supports an arm for supporting the bar material supporting roller via the elastic member. The bar supporting roller is provided with a mechanism capable of obtaining an independent vibration absorbing effect.

(Problems to be Solved by the Invention) However, this conventional bar material steady rest is not configured to receive the bar material only in the axial direction in which the bar material is passed, that is, the vertical direction. The bar material could not be received in the vertical plane of the direction.
For this reason, this bar material steady rest device can be attached only to the tip of the bar material feeder so as not to be an obstacle when supplying the bar material to the bar material feeder. As a result, it has not been possible to sufficiently prevent the rotational runout of the bar material, particularly in the area of the bar material feeder.

Therefore, in addition to the structure having the vibration absorbing effect as in the conventional case, the object of the present invention is to receive the bar material from the upper direction and to effectively rotate the bar material in the area of the bar material feeder. It is an object of the present invention to provide a bar material steady rest that can prevent such a situation.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention provides a fixed substrate,
A movable substrate that is rotatably attached to the fixed substrate, a first cylinder that rotates the movable substrate with respect to the fixed substrate to bring it to the release position, and a plurality of shafts that are rotatably attached to the fixed substrate and the movable substrate. , An arm fixed to each shaft, a bar supporting roller rotatably attached to the tip of the arm, a connecting rod for connecting the shafts, and one of the connecting rods. A second cylinder for rotating each bar material supporting roller from a bar material releasing position where the bar material supporting roller does not contact the outer circumference of the bar material to a bar material supporting position where the bar material supporting roller contacts the outer circumference of the bar material; A bar material steady rest device characterized by having is adopted.

(Example) Next, this invention is demonstrated with reference to drawings.

FIG. 1 is a front view of a bar material steady rest. FIG. 2 is a side view of the bar material steady rest. FIG. 3 is a front view showing a state in which the bar material steady rest is released. FIG. 4 is a front view showing a state of a bar material supporting position in which the bar material supporting roller of the bar material steady rest is closed. FIG. 5 is a schematic perspective view showing a state in which the bar material steady rest is attached to the bar material feeder.

The bar material steady rest device of the present invention is described in the above-mentioned Japanese Patent Application No. 60-2.
With the bar material steady rest device described in the specification of 13383,
"In addition to the vibration absorbing effect of the outer circumference of the bar supporting roller made of an elastic member, each bar supporting roller independently vibrates by supporting the arm for supporting the bar supporting roller via the elastic member. The details are omitted in the present specification and the drawings since they are the same in that they have a mechanism "which can also obtain an absorption effect".

Referring first to FIGS. 1 and 2, the bar stock steady rest 10 is mounted on the frame 12 of the bar stock feeder. The bar material steady rest 10 includes a fixed substrate 14
And a movable substrate 16 rotatably attached to the fixed substrate 14. Specifically, the fixed substrate 1
The four leg portions 14a are fixed to the frame 12, and the arm portion 16a of the movable substrate 16 is rotatably attached to the forked portion 14b of the fixed substrate 14 through the pivot pin 18. The cylinder 2 is provided at the lower end of the arm portion 16a.
Two pistons 24 are attached via pivot pins 20. Therefore, when the cylinder 22 is actuated, the piston 24 is extended, and the movable substrate 16 is configured to rotate clockwise around the pivot pin 18 as viewed in FIG.

A plurality of shafts 26 (2
6a, 26b, 26c, 26d) are rotatably attached (in this embodiment, the fixed substrate 14 has two
The movable substrate 1 has two shafts 26a and 26b attached thereto.
6 has two shafts 26c and 26d attached thereto. The shafts 26a and 26b mounted on the fixed substrate 14
Have a vertical positional relationship, and the shafts 26c and 26d attached to the movable substrate 16 also have a vertical positional relationship. Further, the lengths of the axes are alternately different. An arm 28 is fixed to each shaft 26, and a bar material supporting roller 30 is rotatably supported at the tip of the arm 28. As described above, since the lengths of the respective axes are alternately different, the adjacent arms 2
8 and the bar material supporting roller 30 are configured so as not to interfere with each other.

A bracket 32 is fixed to the shaft 26 at a position adjacent to the base plate (fixed base plate and movable base plate) of each shaft 26. The bracket 32 is fixed except between the brackets fixed to the upper two shafts 26a and 26b. Are the connecting rods 34 (34a, 34b, 34) that are adjacent to each other.
It is connected via a pivot pin by c). The bracket 32 and the connecting rod 3 are fixed to the shaft 26c.
The pivot pin connecting 4b is shown at 35. The axis of the pivot pin 35 is in a position substantially aligned with the axis of the pivot pin 18. Therefore, when the movable substrate 16 rotates about the pivot pin 18 with respect to the fixed substrate 14, the bracket 32 fixed to the shaft 26c also pivots the pivot pin 35 that is coaxial with the connecting rod 34b with the axis of the pivot pin 18. Since it rotates around the center, so-called "twisting" does not occur.

The upper two brackets 32 each have one protrusion for connecting with the connecting rod 34a or 34c, and the lower two brackets 32 have the connecting rod 34a or 34c.
Each has two protrusions for connecting with a, 34b or connecting rods 34b, 34c. Also the shaft 26b
One protrusion of the bracket 32 fixed to is longer than the other protrusion and is connected to the piston 38 of the cylinder (second cylinder) via the pivot pin 40.

Next, referring to FIG. 3, the movable substrate 16 is fixed to the fixed substrate 1.
4 shows a state in which the upper portion is rotated with respect to No. 4 and is held in the released position where the upper portion is released. This is done as follows. That is, when the cylinder 22 is actuated and its piston 24 moves in the direction of arrow A, the movable substrate 16 connected to the piston 24 rotates in the direction of arrow B around the pivot pin 18 (see FIG. 2)). It is done by In this release position, the bar material supporting roller 30 is retracted when the bar material is supplied from above, and the bar material steady rest 10 can receive the bar material from above without disturbing. Further, when the feeding bar moves forward or backward, the bar material steadying device 10 may be released so that the blades of the feeding bar can pass through the bar material steadying device 10 only while passing through the bar material steadying device 10. it can.

The movable substrate 16 can be returned to its original position (the position shown in FIG. 1) by simply stopping the operation of the cylinder 22.

Next, referring to FIG. 4, there is shown a state where the bar material supporting roller 30 is rotated from the bar material releasing position (the position shown in FIG. 1) to the bar material supporting position. This is done as follows. That is, when the cylinder 36 is actuated and its piston 38 moves downward as shown by arrow C, the bracket 32 fixed to the shaft 26b rotates counterclockwise, and the connecting rod 34a connected to the bracket 32 is rotated. Moves downward, and the connecting rod 34b connected to the bracket 32 moves rightward. At the same time, the bracket 32 of the shaft 26c connected to the connecting rod 34b is rotated counterclockwise, and further the connecting rod 34c connected to the bracket 32 is moved upward, so that the connecting rod 34c is connected. The bracket 32 of the shaft 26d also rotates counterclockwise. With rotation of all the brackets 32 in the counterclockwise direction, all the shafts 26 (26a to 26d)
Rotate counterclockwise, and their arms 28 rotate counterclockwise as indicated by arrow D, so that the bar supporting roller 3 is rotated.
0 is moved inward and held in the bar support position. In this position, the bar material is the bar material steady rest 1
When it is received within 0, the bar member supporting roller 30 elastically supports the bar member and prevents the bar member from rotating and swinging.

In order to return the bar material steady rest 10 to the bar material release position, the operation of the cylinder 36 is stopped.

Next, with reference to FIG. 5, the usage mode of the bar material steady rest 10 of the present invention for the bar material feeder will be described. Fifth
In the figure, for example, two bar material steady rests 10 according to the present invention are provided on the upper portion of the frame 12 of the bar material feeder 50.
And one conventional bar material steady rest 10a is attached. One or both of the bar stock steady rests 10 according to the present invention are located at positions where bar stock is supplied from a bar stock supply shelf (not shown). Reference numeral 60 is a bar material processing machine. When the bar material is supplied, the bar material steadying device 10 is released by opening the movable substrate, so that the bar material is received from above the bar material steadying device. Also, when the feed bar is advanced, the bar stock rest is released so that the vanes of the feed bar can pass through.

(Effects of the Invention) As described in detail above, the present invention configures the bar material steady rest so as to receive the bar material from above, so that the rotational runout of the bar material within the area of the bar material feeder is effective. Can be prevented.

[Brief description of drawings]

FIG. 1 is a front view of a bar material steady rest. FIG. 2 is a side view of the bar material steady rest. FIG. 3 is a front view showing a state in which the bar material steady rest is released. FIG. 4 is a front view showing a state of a bar material supporting position in which the bar material supporting roller of the bar material steady rest is closed. FIG. 5 is a schematic perspective view showing a state in which the bar material steady rest is attached to the bar material feeder. 10 ... Bar material steady rest device, 12 ... Frame, 14 ... Fixed substrate, 16 ... Movable substrate, 22 ... First cylinder, 26 ... Shaft, 30 ... Bar material supporting roller, 32 ... Bracket , 34 ... connecting rod, 36 ... second cylinder, 50 ... bar material feeder, 60 ... bar material processing machine.

Claims (3)

[Claims] 1. A fixed substrate, a movable substrate rotatably attached to the fixed substrate, a first cylinder for rotating the movable substrate with respect to the fixed substrate to bring it to a release position, and a fixed substrate and a movable substrate. A plurality of pivotally mounted shafts, an arm fixed to each shaft, a bar support roller rotatably mounted at the tip of the arm, a connecting rod for connecting the shafts, and a connecting rod. Then, by driving the connecting rod, each bar material supporting roller is moved from the bar material releasing position where the bar material supporting roller does not contact the outer circumference of the bar material to the bar material supporting position where the bar material supporting roller contacts the outer circumference of the bar material. A bar material steady rest, comprising: a second cylinder that rotates. 2. The bar material steady rest device according to claim 1, wherein the shaft and the connecting rod are connected via a bracket. 3. The rotation axis of the movable substrate with respect to the fixed substrate is
Claims: Approximately aligned with a rotation axis attached with a connecting rod from a bracket fixed to a shaft attached to a fixed base plate with respect to a bracket fixed to a shaft attached to a rotation base plate. The bar material steady rest device according to item 2.