JPH01281802A - Bar material feeding device for automatic bar material supplying machine - Google Patents

Abstract

PURPOSE:To restrict deviation resulted from the rotation of a nonregular shape material such as an oval-shaped bar material by installing a bush which holds a bar material elastically inside a rotation supporting frame which is installed so that a rotating axial line on a stand which moves the bar material toward direction of feeding coincides with the axis of the bar material. CONSTITUTION:A rail 13 arranged along the direction of bar material feed is fixed on a base stand 12. A stand 15 is fixed on the upper surface of a slide block 14 which is guided by the rail 13, inside a hollow space 15, a bearing 16 is set so that its setting and removal can be easily carried out by using a locking means 18 such as a ring clip or the like. An outer sleeve 17b and a bush 17 which consists of a hollow elastic body 17a made of urethane rubber or the like fixed inside the sleeve 17b are fixed inside the bearing 16. As an oval-shaped bar material 8 is inserted in the hollow inside the space of a hollow elastic body 17a under the condition of partial tight fit, it is held elastically by proper gripping power and any deviation due to rotation is properly restricted.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a bar feeding device in an automatic bar feeding machine.
More specifically, the present invention relates to a bar feeding device that grips the rear end of a bar and feeds the bar to a bar processing machine in an automatic bar feeding machine that automatically feeds the bar sequentially in the length direction.

(Prior Art) In order to feed bars from an automatic bar feeder to a bar processing machine, a method has been proposed that uses a roller steadying device instead of a finger chuck on the feeding bar ( Special request 1976
1-221549). The roller steady rest device is configured to elastically grip the periphery of the bar using four rollers arranged at equal intervals, and an appropriate number of roller steady rest devices are installed on the automatic bar feeder or around the bar. It is appropriately placed between the automatic material feeder and the bar processing machine to suppress runout that occurs as the bar rotates during bar processing. The device disclosed in the above-mentioned Japanese Patent Application No. 61-221549 takes advantage of the ability of this roller steady rest device to grip the bar material, and allows machining without using the normally used finger chuck of the feed bar. The structure is such that the bar is automatically fed to the processing machine while the deflection of the bar is suppressed.

(Problem to be Solved by the Invention) However, this roller steady rest device cannot handle relatively polyhedral rods (hereinafter referred to as round rods, etc.) such as round rods or hexagonal rods.
Although it can be held elastically by two rollers,
It was not possible to properly grip irregularly shaped materials such as rods (approximately elliptical in cross section) or rectangular rods. For example, with irregularly shaped materials such as slender bars, the longer diameter part is located between the rollers, while the shorter diameter part and other rollers are left with a considerable gap. This is because it becomes impossible to grasp it. For this reason, when machining irregularly shaped materials such as rod-shaped bars, the roller steady rest device has not been able to suppress the runout that accompanies the rotation of such irregularly shaped materials.

Therefore, an object of the present invention is to provide a bar feeding device that can elastically grip an irregularly shaped material such as a cylindrical bar, thereby appropriately suppressing the shake caused by the rotation of the irregularly shaped material. .

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a bar feeding device for an automatic bar feeder, which includes a frame movably mounted in the direction of feeding the bar, and a rotation axis. A bar feeder comprising: a rotary support mounted on a frame so that the axis coincides with the axis of the bar; and a bushing attached to the inside of the rotary support for elastically gripping the bar. Provide equipment.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a partially cutaway cross-sectional side view of a bar feeder according to a first embodiment of the present invention (air cylinder omitted), and FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. 3 is a partially cutaway cross-sectional side view of the bar feeding device according to the second embodiment of the present invention (air cylinder omitted), and FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. FIG. 5 is a front view showing the roller steadying device of the bar feeding device.

Referring first to FIGS. 1 and 2, a bar feeder 10 is slidably mounted on a base 12 of an automatic bar feeder.
It is shown. A rail 13 arranged in the bar feeding direction is fixed to the upper surface of the base 12, and a mount 15 of the bar feeding device 10 is mounted on the upper surface of a slide block 14 that is guided by the rail 13 and slides on the rail 13. is fixed. The upper part of the pedestal 15 is formed into a hollow cylindrical shape, and a rotation support, for example, a bearing 16 is attached inside the hollow 15a. The bearing 16 is attached to the pedestal 15 by a suitable locking means 18 such as a ring-shaped clip or a key so that it can be easily attached and detached. Therefore, when sending an irregularly shaped material, for example, the cylindrical bar 8 illustrated in this embodiment, the bearing 16 (and the bushing integrally with this) can be easily attached to the frame, and the irregularly shaped material such as the cylindrical bar 8 can be When feeding other bar materials, such as round bars or hexagonal wires, the bearing 16 is easily removed from the pedestal 15.

A bush 17 is fixed inside the bearing 16, and the bush 17 includes an outer sleeve 17b and a hollow elastic body 17a made of, for example, urethane rubber, fixed inside the sleeve 17b. The inner diameter of the hollow elastic body 17a is formed to be shorter than the long axis of the cylindrical rod 8 to be machined, so that the cylindrical rod 8 is partially tight-fitted into the hollow elastic body 17H. Since it is inserted into the hollow interior of the elastic body 17a, the hollow elastic body 17
a can elastically grip the bar-shaped bar 8 with an appropriate gripping force (see especially FIG. 2).

With this configuration, this bar feeder 10
During processing in the bar processing machine, the rotation of the bar 8 given by the bar processing machine grips the bar 8 and sends it to the bar processing machine. The rotating bush 17 can be supported by the rotating bearing 16, and the vibration caused by the rotation of the rod 8 can be appropriately suppressed.

The bar feeding device 10 of the present invention may further be provided with a roller steadying device 20.

By providing the roller steadying device 20, it is possible to suppress not only irregularly shaped materials such as the cylindrical bar 8 but also selectively the deflection caused by rotation of a round bar or the like. Incidentally, when feeding the irregularly shaped material, the rollers 24 of the roller steadying device 20 are opened and in the retracted position so as not to interfere. This roller steady rest device 20 is disclosed in the above-mentioned Japanese Patent Application No. 61-22154.
Since it is substantially the same as that described in No. 9, it will be summarized later with reference to FIG.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4. The second embodiment uses a roller 11 in place of the bearing 16 used as a rotating support in the first embodiment.

The upper part of the pedestal 15 is formed into a U shape, and the leg part 1
A plurality of roller shafts 19 (in this embodiment, one roller shaft arranged at equal intervals) are attached to 5b and 15C, and a roller 11 is rotatably attached to this roller shaft 19 via a collar 11a and a bearing llb. (See especially Figure 4). A bush 17 consisting of a hollow elastic body 17a and a sleeve 17b is rotatably supported inside the four rollers 11. The scorched bar 8 is held by a bush 17 in the same manner as in the first embodiment.

With this configuration, like the first embodiment,
It is possible to appropriately suppress the vibration caused by the rotation of the bar-shaped bar 8 supplied to the bar processing machine.

Next, referring to FIG. 5, a roller steadying device 20 for gripping a round bar or the like provided in a bar feeding device will be described.

A hole 22 through which the rod 8a can pass is provided in the center of the rotational steady rest device 20 attached to the front surface of the pedestal 15, and roller support arms 23a are provided at four locations surrounding the hole 22.
, 23b, 23c, and 23d are pivotally attached to the substrate 21. The pedestal 15 is fixed to the slide block 14. At the tip of each roller support arm is a roller 24a,
24b, 24c.

24d is rotatably supported. Further, levers 25a and 25b are provided on the pivot shaft of each roller support arm.

25C, 25d are fixed, L/bar 25a and 2
5b, between levers 25b and 25c, and between levers 25b and 25c.
There are tie bars 26a and 26 between c and 25clO, respectively.
b and 26c are pivotally connected.

One lever 25a is connected to 27 spin rods 27a. Therefore, when the spin rod 27a is extended, the lever 25a and the roller support arm 23a are rotated in the direction shown by arrow A (the direction in which the roller 24a is directed toward the center of the hole 22), and at the same time, the other roller support arm 23b is rotated.
, 23C and 23d are also driven via tie bars 26a, 26b and 26c, which causes all rollers 2
4a, 24b, 24C, and 24d are simultaneously rotated toward the center of the hole 22. Therefore, the outer peripheral surface of the bar 8a passing through the hole 22 is gripped by each roller. 1 lever 2
5b is provided with a stopper 25b+, which stops the balancing piece 2 of the adjusting screw 28 as shown by the dashed line when each roller closes toward the center of the hole 22.
8a, the hole 22 of each roller support arm can limit the rotational movement (closed amount) toward the center of the hole 22.

Therefore, when changing the diameter of the bar 8a to be processed,
By adjusting the amount of closing of each of the support arms using the adjustment screw 28, it is possible to obtain the optimum support condition according to the diameter of each bar material.

The operation of feeding the bar by the bar feeding device 10 is substantially the same as that described in the aforementioned Japanese Patent Application No. 61-221549, so details can be found in the aforementioned Japanese Patent Application No. 61-221
See No. 549.

(Effects of the Invention) The bar feeding device according to the present invention has a bushing that grips the irregularly shaped material and is configured to rotatably support the bushing, so that it can elastically grip the irregularly shaped material. , it is possible to effectively suppress the run-out caused by the rotation of the irregularly shaped material during processing.

Furthermore, when a roller steady rest device is attached to the above-mentioned bar feeding device, it is possible to suppress the deflection caused by rotation when processing not only irregularly shaped materials but also round bars and the like.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a bar feeding device according to a first embodiment of the present invention in a partially cutaway cross-sectional view, with an air cylinder omitted. FIG. 2 is a cross-sectional view taken along line 2--2 in FIG. FIG. 3 is a side view showing a bar feeding device according to a second embodiment of the present invention in a partially cutaway cross-section, with the air cylinder omitted. FIG. 4 is a cross-sectional view taken along line 4--4 in FIG. FIG. 5 is a front view showing the roller steadying device of the bar feeding device. 8... Bar material, 10... Bar material feeding device, 12
...Base, 13...Rail, 14...
・Slide block, 15... Frame, 16...
Bearing, 17... Bush, 17a...
- Elastic body, 17b...Sleeve, 19...Roller shaft, 11...Roller. Figure 2 Figure 4

Claims (2)

[Claims] (1) In a bar feeding device in an automatic bar feeding machine,
A frame is attached to be movable in the direction in which the bar is fed, a rotating support is attached to the frame so that the axis of rotation coincides with the axis of the bar, and a rotating support is attached to the inside of the rotating support to move the bar elastically. A bar feeding device characterized by having a bush that grips the bar material. (2) The bar feeding device according to claim (1), wherein the rotating support is a bearing or a roller.