JP2673220B2 - Bar feeder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bar material feeder for continuously supplying a bar material to a machine tool such as a lathe.

(Prior Art) In this type of conventional bar feeder, a bar-shaped feed member (hereinafter referred to as a "feed arrow") is usually arranged to grip a bar and feed the bar toward a machine tool. ing. Further, the feed arrows are arranged coaxially with the bar material, that is, in a column so as to grip the bar material. Therefore,
The above-mentioned conventional bar material feeder has a problem that the total length thereof is equal to or more than the sum of the length of the bar material and the length of the feed arrow, and the installation space thereof is significantly increased.

Further, in order to solve this problem, a bar material feeder including a guide rail for primary feed in which a feed arrow is housed and a guide rail for secondary feed arranged in parallel,
It has already been proposed by the applicant (for example, Japanese Patent Application No. 63
-42927).

(Problems to be Solved by the Invention) However, the bar feeder proposed by the present applicant needs to provide two guide rails for primary feeding and secondary feeding, and both guide rails are provided.
Since a device for moving between a position coinciding with the spindle center of a lathe or the like and a retracted position deviated from the center is required, the mechanism of the bar feeder as a whole becomes complicated, and
Along with this, there was room for improvement in terms of increased manufacturing costs.

The present invention was made in order to solve the problems of the above-mentioned conventional techniques, and while realizing the reduction of the total machine length,
An object of the present invention is to provide a bar feeder that can simplify the mechanism of the entire machine by simplifying the mechanism for the primary and secondary feeds of the bar.

(Means for achieving the object) The present invention, in order to achieve the above object, a frame provided with a guide member for supplying a bar material to a processing machine, and arranged movably along the guide member, Performs a primary feeding operation for feeding the bar material supplied into the guide member toward the processing machine by a predetermined amount, and a secondary feeding operation for supplying the bar material fed by the primary feeding operation to the processing machine. The feeding member and a rod member engaging member that is provided integrally with the feeding member and that engages with the rear end portion of the rod member during the primary feeding operation are provided.

(Operation) Since the rear end portion of the rod is engaged with the rod engaging member during the primary feeding operation, the primary feeding operation of the rod can be performed in this state, and at this time, the rear end portion of the rod is Need not be placed before the front end of the feed arrow.

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

1 to 3 show plan views of a bar feeder according to the present invention in different operating states. Reference numeral 2 in these drawings indicates a bar material feeder, and the bar material feeder 2 is a stand 8 which is vertically expandable and contractable, and the stand 8
And a frame 6 supported in the direction of the water supply to the lathe 4 and extending substantially in the aqueous direction. A guide member, that is, a guide rail 12 extending along the longitudinal direction of the frame 6 is fixed to one side surface of the frame 6 via a bracket 10. Inside the guide rail 12, a feed arrow 14 that holds the rear end of the bar W supplied to the lathe 4 and presses the bar W toward the lathe 4 is movably arranged along the guide rail 12. Has been done. At the front end of the feed arrow 14, the bar W
A chucking member 15 having an inner diameter substantially the same as the outer diameter of the chuck is provided.

An engagement member 16 that engages with the guide rail 12 is fixed to the rear end of the feed arrow 14. One end of a rope 18 is connected to the engaging member 16. The other end of the rope 18 is wound around a pulley 22 arranged at the front end of the frame 6, and a weight 20 is connected to the other end of the rope 18. Therefore, the feed arrow 14 moves along the guide rail 12 as the weight 20 moves up and down.

To the other side surface of the frame 6, one end of a plurality of brackets 24 (six in the embodiment) extending in the width direction of the frame 6 is fixed. A screw member 26 having a spiral groove formed on the surface is formed at an intermediate portion of each of the plurality of brackets 24.
Are rotatably supported. The width of this spiral groove is
The outer diameter of the rod W is slightly larger than that of the rod W so that the rod W can be held therein. Also, the screw member 26
Has one end located above the guide rail 12 and the other end integrally provided with a helical gear 27.

A rotary shaft 28 extending along the longitudinal direction of the frame 6 is rotatably supported at the other end of the bracket 24.
The rotating shaft 28 is driven by a driving means (not shown). A helical gear (not shown) is fixed to the rotary shaft 28 at a position facing the helical gear 27 of the screw member 26, and the helical gear meshes with the helical gear 27. Therefore, as the rotary shaft 28 rotates due to the operation of the driving means, the plurality of screw members 26 simultaneously rotate.

A first clamp member 30 is arranged at an intermediate portion in the longitudinal direction of the frame 6. This first clamp member 30
Is the clamp member 30a and the rear clamp member 30b.
Both clamp members 30a and 30b are
The rod W put into the inside is gripped at a timing described later. Further, the first clamp member 30 is configured to perform an opening / closing operation and a minute movement operation in the longitudinal direction of the guide rail 12 by a cam mechanism (not shown).

At the front end of the frame 6, as will be described later, a feed arrow 14
The second clamp member 40 is arranged to grip the bar W sent by the primary feeding operation at a predetermined timing. The second clamp member 40 includes a pair of claws that are opened and closed by, for example, a solenoid plunger.

As shown in FIG. 4, the engaging member 16 is provided with a bar member engaging member 50 having a slope portion 50a and a locking plate portion 50b. Above the slope 50a, the corresponding screw member 2
6 tips are located.

 Next, the operation of the bar feeder having the above structure will be described.

First, a plurality of rods W to be supplied to the lathe 4 are engaged with the spiral grooves of the screw member 26 so that the plurality of rods W are arranged on the screw member 26 at a predetermined pitch. Further, at this time, the feed arrow 14 is, as shown in FIG. 1, a guide rail.
It is stationary at the end of twelve. In this state, by operating the driving means, the plurality of screw members 26 rotate, whereby the bar W held in the groove of the screw member 26 moves from the other end side of the screw member 26 to the one end side. It moves and falls in the guide rail 12 in sequence. At this time, one end of the bar W falls onto the slope 50a of the bar engaging member 50,
It slides down along this, and is engaged with the bar engaging member 50 by being stopped by the locking plate portion 50b.

Next, as the weight 20 descends, the feed arrow 14 advances toward the lathe 4, and the bar W is pressed by the bar engaging member 50 and advances as shown in FIG. By doing so, the primary feeding operation of the bar W is performed. In this state, the other end of the bar W is located inside the guide rail 12 and substantially coaxial with the spindle center of the lathe 4 (not shown), while one end of the bar W has a bar engaging member 50. Since the outer diameter of the bar W is remarkably smaller than the length thereof, the bar W is sufficiently bent in the vertical direction. be able to. Therefore, the primary feeding operation can be performed while the bar W is engaged with the bar engaging member 50, and the rear end of the bar W is arranged before the front end of the feed arrow 14. In comparison with the front end portion of the feed arrow 14 and the bar material W in the bar material engaging member 50,
The length of the guide rail 12, that is, the length of the bar feeder 2 can be shortened by the distance from the rear end portion.

Then, for example, when the engagement member 16 reaches the arrangement position of the first clamp member 30, the second clamp member 40 closes and grips the bar W (see FIG. 2). After that, send arrow
14 retreats to the rearmost end of the guide rail 12 while leaving the bar W in the guide rail 12.

Then, the feed arrow 14 advances again. Then, when the chucking member 15 of the feed arrow 14 reaches the position where the first clamp member 30 is arranged, the front clamp member 30a of the first clamp members 30 grips one end of the bar W. ,
The axis of the rod W is aligned with the center of the spindle of the lathe 4.
At this time, the clamp member 30b on the rear side of the first clamp member 30 grips the chucking member 15 of the feed arrow 14 to align the axis of the feed arrow 14 with the spindle center of the lathe 4. . Then, in this state, the rod members W are mounted on the feed arrow 14 by bringing the clamp members 30a and 30b close to each other. After this, the second clamp member 40 is opened (see FIG. 3).

Next, when the weight 20 is lowered, the bar W is pressed by the feed arrow 1 and is fed toward the lathe 4, whereby the secondary feeding operation is performed, and at the same time, the lathe 4 is moved.
The bar W is processed by.

(Effects of the Invention) As described in detail above, according to the present invention, in the state where one end of the rod is engaged with the rod engaging member provided on the feeding member, the primary feeding operation of the rod is performed by the feeding member. Since it is possible to reduce the total length of the bar feeder, a single guide member is sufficient, and the mechanism for the primary and secondary feeds of the bar is greatly simplified. This has an effect that the mechanism can be simplified.

[Brief description of the drawings]

1 to 3 are plan views showing the bar material feeder according to the present invention in different operating states, and FIG. 4 is a perspective view showing a bar material engaging member. 2 …… Bar material feeder 4 …… Lathe (processing machine) 6 …… Frame 12 …… Guide rail (guide member) 14 …… Feeding arrow (feeding member) 50 …… Bar material engaging member W …… Bar material .

Claims (1)

(57) [Claims] 1. A frame provided with a guide member for supplying a bar material to a processing machine, and a frame movably arranged along the guide member, wherein the bar material supplied into the guide member is processed by the processing machine. A primary feed operation for feeding a predetermined amount toward, and a secondary feed operation for feeding the bar fed by the primary feed operation to the processing machine; and a feed member integrally provided with the feed member, A bar material feeder, comprising a bar material engaging member with which a rear end portion of the bar material is engaged during a primary feeding operation.