JPH08258992A - Screw feeder - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate the bridging condition of chips and to convey chips smoothly. [Structure] A cutter 4 for cutting the chips fed into a hopper 5, and a bucket 6 for receiving the chips cut by the cutter 4.
And the discharge unit 11 provided in the bucket 6, and the discharge unit 11
The bridge removing mechanism is provided with a screw 7 that sends out cutting chips, and a cylinder 19 that swings a breaker body 18 provided with a hook 24 and a buckle 23 between the cutter 4 and the bucket 6. When the cylinder 19 is expanded or contracted, the breaker body 18 swings to break the pile of chips cut by the cutter 4, and the chips 7 are smoothly transferred by the screw 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip bridge eliminating mechanism in a screw feeder for crushing, collecting and conveying chips generated during machining.

[0002]

2. Description of the Related Art Conventionally, chips and the like produced by machining or cutting are finely cut by a screw feeder as shown in FIG. 3 and collected and conveyed.

To explain this, the screw feeder 1
A cutter 4 is provided on a pedestal 3 on the upper part of the main body 2, and the cutter 4 finely cuts chips and the like generated by machining and cutting, and a hopper 5 for introducing chips and the like is provided above the cutter 4. It is attached. A screw 7 is rotatably supported on a bottom portion of a bucket 6 of the main body 2 via a bearing 8, and is rotated by a rotation drive mechanism including a motor 9 and a gear 10 to transfer chips and the like.

A discharge recess 11 is formed at the end of the bucket 6.
Is provided, and chips and the like are sent from the discharge recess 11 to the discharge pipe 12.

Therefore, the chips generated in the hopper 5 by machining or cutting are finely cut by the cutter 4 and then fall into the bucket 6. Then, when the screw 7 provided in the bucket 6 rotates, the chips are pushed out by the screw 7 and sent from the discharge recess 11 to the discharge pipe 12, and are transferred by a transfer device (not shown) using negative pressure. There is.

[0006]

However, in this case, the chips that are finely cut by the cutter 4 and fall into the bucket 6 may pile up on the screw 7 and become entangled and accumulated in a bridge state.

[0007] One of the causes is that the shape of the cutting chips after cutting is a special shape depending on the material of the member to be cut, so that the chips easily get entangled, and the cutting oil used during cutting is used. For example, the chips may stick to each other due to the adsorption of chips, and in other cases, the amount of chips generated differs depending on the machine tool model. The screw feeder 1 may be intermittently operated after the water is accumulated in the bucket 6. However, due to the convenience of temporarily stacking the chips in the bucket 6, it is possible to cut the piled chips during this period. There is a case where the powder is entangled with each other to form a bridge.

When the chips are piled up in this way and become entangled with each other to form a bridge state, the chips do not collapse even when the screw 7 rotates, and the chips are simply idled to smoothly convey the chips. In addition to that, the chips are not conveyed, so that the chips sometimes overflow from the bucket 6 and are scattered around.

For this reason, it is necessary to constantly pay attention to when the pile of chips is destroyed by hand or when the bridge state occurs, which requires manpower, is very troublesome, and has a problem of poor work efficiency. there were .

The present invention aims to solve such a problem.

[0011]

A first aspect of the present invention is directed to a cutter for cutting the chips to be put into a hopper, a bucket for receiving the chips cut by the cutter, a discharging section provided in the bucket, and a discharging unit. In a screw feeder provided with a screw for sending the cutting chips to the section and a rotation driving mechanism for rotating the screw, a bridge eliminating mechanism for breaking down the pile of cutting chips is provided between the cutter and the bucket.

In a second aspect based on the first aspect, the bridge eliminating mechanism comprises a breaker body provided with an agitating member and a drive means for swinging the breaker body.

In a third aspect based on the second aspect, the drive means is composed of a cylinder, a solenoid, a motor or the like.

In a fourth aspect based on the second aspect, the stirring member and the breaker body are made of a non-magnetic material.

[0015]

Therefore, in the first aspect of the invention, even if the chips finely cut by the cutter and dropped are piled up on the feeder in the bucket, the bridge eliminating mechanism in the middle scrapes the piles of chips, It is possible to prevent the chips from being entangled with each other to be accumulated in a bridge state, and the screw can smoothly send the cutting chips to the discharge portion.

In the second aspect of the invention, the bridge eliminating mechanism is composed of the breaker body provided with the stirring member and the driving means for swinging the breaker body. Can be easily installed without modification.

In the third invention, the driving means is a cylinder,
You can select the most suitable one, such as a solenoid or motor, as needed.

In the fourth aspect of the invention, the stirring member and the breaker body are made of non-magnetic material, so that the cutting chips of the steel material do not adhere,
There is nothing to do with these.

[0019]

1 and 2 show an embodiment of the present invention.

FIG. 1 is an overall front view of the present invention, and FIG. 2 is a side view thereof. A pedestal 3 above the main body 2 of the screw feeder 1 is provided with a cutter 4 for finely cutting chips and the like. The cutter 4 is provided with a hopper 5 for injecting chips and the like produced by machining or cutting. Body 2
A screw 7 is provided at the bottom of the bucket 6 via a bearing 8 and is rotated by a rotation drive mechanism including a motor 9 and a gear 10 to transfer chips and the like. A discharge recess 11 is provided at one end of the bucket 6, and a discharge pipe 12 is connected to the discharge recess 11.

A bridge eliminating mechanism 15 is provided between the cutter 4 and the bucket 6 to break up the accumulation of chips in the pile.
Is provided. The bridge eliminating mechanism 15 is composed of a breaker body 18 linked to the side plate 16 of the main body 2 and the pedestal 3, and a cylinder 19 for swinging the breaker body 18.

A rod 25 is provided at one end of the breaker body 18.
This rod 25 is inserted and locked in a hole 17 provided in the side plate 16 of the main body 2, and the other end of the rod 25 is attached to the cylinder 19 attached to the mount 3 via the bracket 20. It is engaged with the yoke 21 through the pin 22. A universal joint or the like may be used for linking the side plate 16 and the breaker body 18.

The breaker body 18 moves up and down by the expansion and contraction of the cylinder 19, and swings about the hole 17 of the side plate 16 as a fulcrum.

On the side surface of the breaker body 18, a plurality of rod-shaped buckles 23 are provided in the horizontal direction and a plurality of hooks 24 are provided in the downward direction as a stirring member for breaking down the pile of chips.
Are attached at a predetermined interval.

The cylinder 19 expands and contracts by controlling the supply pressure through a solenoid valve that opens and closes in response to a signal from a control device (not shown), and rocks the breaker body 18. This rocking mechanism as,
Not only the cylinder but also other driving means such as a solenoid or a motor can be used.

Further, the buckle 23 and the hook 24 provided on the breaker body 18 are threaded with a round bar or a pipe so as to be detachably attached, or depending on the characteristics of the material of the chips, the breaker body 18 and the buckle. 23, hook 2
The material such as 4 may be a non-magnetic material, and the shape and the number of attachments may be changed as necessary.

With the above construction, the operation will be described.

The chips put into the hopper 5 are finely cut by the cutter 4 and fall into the lower bucket 6. On the other hand, the breaker body 1 having the buckle 23 and the hook 24
8 is a side plate 16 due to expansion and contraction of the cylinder 19.
The hole 17 of FIG. For this reason, the chips that have fallen hit the buckle 23 and the hooks 24 and scatter in a wide range within the bucket 6, and do not accumulate like a mountain in a part.

When the screw 7 is rotated by the rotary drive mechanism composed of the motor 9 and the gear 10 in conjunction with the swinging motion of the breaker body 18, the rotation of the screw 7 causes the chips to reach the discharge recess 11 of the bucket 6. The sent chips are smoothly conveyed toward the discharge pipe 12 without accumulating.

Further, even when chips are piled up on the screw 7 in the bucket 6 while the swing of the breaker body 18 is stopped, the swing motion of the breaker body 18 is started, so that the breaker body 18 is started. The buckle 23 and the hook 24 of the device scrape the pile of chips, and the pile of chips collapses,
The chips are not piled up as in the conventional case and are not entangled with each other to form a bridge state, and the chips are smoothly conveyed to the discharge recess 11 by the screw 7.

[0031]

As described above, according to the first aspect of the present invention, the cutter for cutting the chips to be put into the hopper, the bucket for receiving the chips cut by the cutter, and the discharging portion provided in the bucket. In a screw feeder having a screw for sending chips to the discharge part and a rotation drive mechanism for rotating the screw, a bridge eliminating mechanism for breaking down the pile of chips between the cutter and the bucket is provided. , The chips that are cut by the cutter and fall are scraped by the action of the bridge elimination mechanism, so that the chips are not piled up in a bridge shape, and therefore the chips overflow from the bucket, Smoothly and efficiently transporting chips without cluttering the surroundings and without requiring human attention to constantly monitor when the bridge state occurs. There is an effect that kill.

According to the second aspect of the invention, the bridge eliminating mechanism is composed of the breaker body provided with the stirring member and the drive means for swinging the breaker body. Therefore, the structure is simple, the cost can be reduced, and the cutting mechanism can be cut. It can be easily installed on existing equipment that does not have a powder bridge elimination mechanism without major modification.

According to the third invention, the driving means may be any one of a cylinder, a solenoid, a motor, etc., and an optimum driving means can be set according to the application and purpose.

According to the fourth aspect of the invention, the stirring member and the breaker body are made of non-magnetic material, so that the cutting chips made of steel do not adhere to the stirring member and the breaker body, and Entanglement can be prevented more reliably.

[Brief description of drawings]

FIG. 1 is an overall front view showing an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Screw feeder 4 Cutter 5 Hopper 6 Bucket 7 Screw 11 Discharge recess 15 Bridge elimination mechanism 18 Breaker body 19 Cylinder 23 Buckle 24 Hook

Claims (4)

[Claims] 1. A cutter for cutting chips to be fed to a hopper, a bucket for receiving the chips cut by the cutter, a discharge unit provided in the bucket, a screw for discharging chips to the discharge unit, and a screw. A screw feeder having a rotation drive mechanism for rotating the screw feeder, comprising a bridge elimination mechanism for breaking up a pile of chips between the cutter and the bucket. 2. The screw feeder according to claim 1, wherein the bridge eliminating mechanism includes a breaker body provided with a stirring member, and a drive means for swinging the breaker body. 3. The screw feeder according to claim 2, wherein the driving means is a cylinder, a solenoid, a motor, or the like. 4. The stirring member and the breaker body,
The screw feeder according to claim 2, which is made of a non-magnetic material.