JPH0344406Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a bar feeder for sequentially feeding bars to a bar processing machine, and in particular allows the bars to rotate smoothly and quietly within a guide member. The present invention relates to a bar feeder that supplies oil into a guide member in order to achieve this.

BACKGROUND ART When a bar material is subjected to machining such as cutting with a bar processing machine, the bar material is rotated at a considerably high speed. Therefore, since the bar is rotated at high speed within the guide member of the bar feeder, it is likely to cause vibration and noise due to contact with the guide member, or damage to both the bar and the guide member. Ta.

In order to solve this problem, we have developed a bar feeder that supplies oil into the guide member and forms an oil film between the bar and the guide member to avoid direct contact between the two. has also been developed.

With this type of bar feeder, for example,
What is disclosed in Publication No. 71102 will be explained based on FIG.

As shown in FIG. 3a, the bar feeder 1 is equipped with a hollow cylindrical guide tube 2, into which oil 3 (FIG. 3b) is supplied.
The rod 4 inserted into the guide tube 2 and the guide tube 2 are designed not to come into direct contact with each other. In this bar feeder 1, the guide tube 2 is configured as one hollow cylindrical body, so when inserting the bar 4 into the guide tube 2,
As shown by the dashed line in FIG. 3c, the guide tube 2 had to be rotated around the pivot 5 and then inserted from the direction indicated by the arrow A. That is, when attempting to insert the bar 4 while the guide tube 2 is fixed at the machining position shown by the solid line in FIG. This is impossible because the bar processing machine 6 gets in the way, so in the process of inserting the bar 4, the guide tube 2 is temporarily moved to the position shown by the dashed line.
After inserting it, it was necessary to return it to the processing position shown by the solid line. Of course, the rotation operation of the guide tube 2 and the insertion operation of the bar 4 are all performed manually, and even if it were attempted to automate these operations, not only would it require a large amount of equipment, but it would also require a large amount of equipment. As a practical matter, this was not possible, as the installation space for this would have to be considered.

Another prior art bar feeder that supplies oil into the guide member to avoid direct contact between the bar and the guide member is disclosed in Japanese Patent Application Laid-Open No. 60-6301. This bar feeder is manufactured by the above-mentioned Japanese Patent Publication No.
Unlike the bar feeder disclosed in Japanese Patent No. 60-71102, a guide tube formed as an integral hollow cylinder is not used, but a guide member divided into upper and lower parts is used. Therefore, the upper member functions as a lid that can be opened and closed with respect to the lower guide member. For this reason, even when inserting a bar into the guide member, it is necessary to
It is not necessary to rotate the guide tube once and insert it from the front like the bar feeder disclosed in Publication No. 71102, but instead of opening the lid and inserting the guide tube as in the conventional oil-free bar feeder. The rod can be rolled and dropped into the groove of the member from the side of the guide member.

However, this bar feeder is
Similar to the bar feeder disclosed in No. 60-71102,
As the drive device for moving the bar forward toward the bar processing machine, we use a method in which the piston of a hydraulic (or air) cylinder device is used to move the bar stock.
There is a problem in that the overall length of the bar feeder becomes long and a large installation space is required.

Problems to be solved by the present invention As described above, in a bar feeder that supplies oil into the guide member to avoid direct contact between the bar and the guide member, oil is not leaked from the guide member. From this point of view, it is best to use a guide tube as a guide member, which is an integral hollow cylinder, as in the bar feeder disclosed in Japanese Patent Application Laid-Open No. 60-71102, but it is also possible to automate the bar insertion work. Because of this difficulty, it is not possible to create a bar feeder that can handle continuous automatic operation day and night, in line with recent NC automation of bar processing machines.

In addition, in the bar feeder disclosed in JP-A-60-6301, the guide member is divided into two parts in the vertical direction, so the bar loading work is different from that of the conventional oil-free method. Although it is possible to do this simply as with the feeder, the structure uses a cylinder device as the forward drive device for the bar and moves the piston to move the bar forward, so the overall length of the bar feeder is lengthened,
This hinders efficient consideration of factory layout.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a bar feeder that overcomes the drawbacks of conventional bar feeders.

In order to achieve this purpose, the bar feeder of the present invention has a guide member divided into two parts (this point is similar to the bar feeder disclosed in JP-A No. 60-6301). In addition, the chain drive device used in conventional oil-free bar feeders is used as the drive device to advance the bar material. The biggest problem with making it possible to shorten the overall length of the feeder and adopting a chain drive device for a lubricated bar feeder is that the feed bar, which makes reciprocating motion within the guide member, and the guide member This is due to oil leakage due to the need to provide a gap in the guide member through which a connecting member (commonly called a "vane") for connecting to the chain drive device installed outside the guide member can pass. It is characterized in that this gap is filled with a filling member that moves together with the connecting member.

Embodiments Hereinafter, embodiments of the bar feeder of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of the main parts of the bar feeder 10 of the present invention, centering on a guide member 12 supported by a frame 11 attached to the upper part of a support leg (not shown) and a chain drive device 14.

The guide member 12 is a long member extending in the longitudinal direction of the bar feeder 10 (in the direction perpendicular to the paper surface of FIG. 1), and has a groove 12a that is open at the top. A bar and a feed bar for feeding the bar toward the bar processing machine are housed in the groove 12a so as to be able to reciprocate. FIG. 1 shows a state in which the feed bar slider 16 at the rear end of the feed bar is accommodated. The guide member 12 is further provided with an oil supply port 12b for supplying oil into the groove 12a. The supplied oil is discharged from the rear end of the guide member 12 and the lower hole immediately after the tip oil separator (not shown) and returned to the reservoir (not shown), and from the reservoir is pumped to the guide member by a pump (not shown). The oil is circulated to the 12 oil supply ports 12b.

Next, the chain drive device 14 for driving the feed bar will be explained with reference to FIGS. 1 and 2. Figure 2 is for clarity of drawing.
This figure shows a state in which the guide member 12 and other components are omitted, and the chain drive device 14 is mainly extracted. Further, the chain drive device itself is widely used in conventional bar feeders and is well known. Of the shafts 14b and 14b' rotatably attached to the front and rear ends of the frame 11 of the bar feeder 1, one of the shafts (shaft 14b' attached to the rear end in the drawing) is It is driven by a motor 14a. A sprocket 14c' is integrally fixed to the shaft 14b';
is rotatably mounted. A chain 14d is stretched between the sprockets 14c, 14c', and a slider 14e is provided in the middle of the chain 14d. This slider 14e
is designed to be able to slide on a rail 17 (Fig. 1) attached to the frame 11 parallel to the guide member 12 along the longitudinal direction of the bar feeder 1, and is connected by a connection usually called a "vane". The infeed bar slider 16 at the rear end of the infeed bar is driven via the member 18. As described above, the chain drive device 14 consists of each component 14a to 14e.

The bar feeder 1 of the present invention includes a lid 2 that can cover the groove 12a that is open at the top of the guide member 12.
0 is set. This lid 20 is pivotally supported by a shaft 22, and can be opened when inserting the bar 25 placed on the bar supply shelf 23 into the groove 12a of the guide member 12. It can be closed when being processed by a processing machine. Therefore, unlike the conventional bar feeder described in FIG. 3, there is no need to insert the bar from the tip of the guide tube, and there is no need to rotate the guide tube for this purpose.

On the other hand, while the bar material is being processed by the bar processing machine, the bar material must be sequentially advanced toward the bar processing machine, and this forward movement is performed by an infeed bar driven by the chain drive device 14. It is done. In the present invention, in order to shorten the overall length of the bar feeder 1, the mechanism for advancing the bar by moving the piston of the cylinder device, as in conventional bar feeders, is avoided, and the feed bar is moved by the chain drive device 14. For this purpose, a connecting member 18 for connecting the chain drive device 14 and the feed bar is provided between the guide member 12 and the lid 20 to advance the bar by driving the bar. Provision must be made that a gap d is formed which can be moved along the length of the feeder 1.

Providing such a gap d means that the guide member 1
Especially when the rod rotates, the oil supplied into the space 2 may leak out from the gap d. Therefore, in the present invention, a mechanism for filling the gap d is provided to prevent oil from leaking from the gap d, and this mechanism will be explained below.

In particular, as best shown in FIG.
Pulleys 30, 30' are attached to the tips of the shafts 14b, 14b' that support c'. Pulley 3
0' rotates integrally with the shaft 14b'.
b', but the pulley 30 is mounted so as to be freely rotatable relative to the shaft 14b.
A belt 32 made of a suitable material capable of preventing leakage of oil from the gap d is stretched between the two pulleys 30, 30'. The belt 32 is preferably made of, for example, a core made of nylon or the like with excellent tensile strength and flexibility, and whose outer surface is coated with urethane resin or the like with excellent sealing properties. The belt 32 must be configured to travel at the same speed as the connecting member 18. Therefore, chain 14
The pulleys 30, 30' and the sprocket 14c,
Determine the pitch circle diameter of 14c'. At the intersection of the belt 32 and the connecting member 18, a belt notch is provided with dimensions equal to the width and thickness of the connecting member 18, so that the connecting member 18 fits into this notch. Although the belt 32 is shown as a flat belt in FIGS. 1 and 2, a round belt may also be used.

In addition, in the embodiment shown in FIGS. 1 and 2,
The belt 32 is connected to the shaft 14b of the chain drive device 14,
Although the belt 32 is configured to be driven by the pulleys 30, 30' attached to the belt 14b', it is not necessary to configure it in this way, and the belt 32 may be driven using an independent motor or the like. You can. In short, the belt 32 may be configured to be driven such that the moving speed of the connecting member 18 and the moving speed of the belt 32 are equal.

Effects of the invention Since the present invention is configured as described above, even if it is a bar feeder that supplies oil into the guide member, the bar feeder will be able to produce more bar material than the conventional bar feeder of the same type. Because it is easy to install, it is possible to perform automation that can be adapted to the automation of bar processing machines using NC control, and the overall length of the bar feeder can be shortened.
It also has advantages such as being able to prevent leakage of oil supplied into the guide member.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main parts of the bar feeder according to the present invention. FIG. 2 is a perspective view showing only the main parts, including the chain drive device, of the bar feeder according to the present invention. FIG. 3 is a schematic explanatory diagram showing a conventional bar feeder. 12... Guide member, 18... Connection member, 20
...Lid, 30, 30'...Pulley, 32...Belt.

Claims (1)

[Claims for Utility Model Registration] A guide member having a groove with an open upper part for slidably holding the bar material to be supplied and the feed bar, and a chain drive for reciprocating the feed bar. and a connecting member for connecting the chain drive device and the feed bar, wherein the guide member has an openable and closable groove that can cover the groove that is open at the top. A lid and an oil supply port for supplying oil into the groove are provided, and when the lid is closed, a gap is formed between the guide member and the lid through which the connecting member can pass,
A bar feeder characterized in that the gap is configured to be filled with a filling member that moves together with the connecting member.