JPH0730295Y2 - Bar cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cutting device for cutting a rod used for a felt nib, a plastic nib, or the like into a predetermined length.

(Prior Art) Plastic nibs used for felt-tip pens are
A plastic bar A as shown in FIG. 9A is cut into a predetermined size as shown in FIG. 9B, and a tip portion B thereof is, for example, shown in FIG. 9C.
The taper is cut as shown in.

The applicant of the present application previously developed a cutting device for automatically cutting the bar A by a predetermined size and applied for a utility model registration (Actual Application Sho
63-10137, Jitsukai Sho 1-141251).

As shown in FIG. 15, the cutting device is a bar A in a hopper C.
Are agitated by the agitating pulley D and conveyed one by one in the longitudinal direction by the conveyor E, and when the tip end a hits the stopper H through the guide hole G of the guide plate F, the cutter provided on the guide plate F J is automatically lowered so that the bar A is cut into a predetermined length.

(Problems to be solved by the invention) However, the cutting device shown in FIG. 15 can cut the bar A only when the cutter J descends. Moreover, since the guide hole G is closed by the cutter J while the cutter J is descending, the bar A is not sent out first, and the cutter J rises and comes out of the guide hole G for the first time. The material A is fed until it hits the stopper H. Therefore, the cycle time from the first cutting to the next cutting is long and the work efficiency is poor.

(Object of the Invention) An object of the present invention is to provide a bar cutting device which can shorten the cycle time from the first cutting to the next cutting and improve the working efficiency.

(Means for Solving the Problem) The first bar cutting device according to the present invention is, as shown in FIG. 1, a carrier 2 for carrying one by one a bar A in its longitudinal direction.
And the stopper / switch 3 with which the bar A hits,
It is characterized in that it is provided with a cutter 4 having two cutting blades 4a, 4b for reciprocatingly moving and cutting the bar A at the time of going and returning at both sides in the moving direction.

A second bar cutting apparatus according to the present invention is provided with an ejector 5 for reciprocally moving together with the cutter 4 and discharging the cut bar A, as shown in FIG. To do.

(Operation) In the bar cutting apparatus of the present invention, the cutter 4 is reciprocally moved through the bar A as shown in FIGS. When the bar A sent out in the longitudinal direction protrudes by a predetermined length, the tip a of the bar A hits the stopper / switch 3 and the switch 3 is turned on, whereby the cutter 4 moves in the direction of conveyance of the bar A. Moved in one direction to cross. At this time, the cutting blade 4a formed on one side in the moving direction of the cutter 4
Thus, the bar A is cut into a predetermined length. When the cutter 4 passes through the cut surface of the bar A, the carrier 2 sends the bar A until it hits the stopper / switch 3, and when the switch 3 is turned on, the cutter 4 is returned in the opposite direction to the previous one. At this time, the bar A is cut into a predetermined length by the cutting blade 4b formed on the other side surface in the moving direction of the cutter 4. Accordingly, the bar A is cut twice, once each when the cutter 4 moves forward and once when the cutter 4 returns.

Further, the bar material A cut during the forward movement of the cutter 4 is supported by one bar material discharging portion 21a of the discharging body 5 which moves together with the cutter 4 as shown in FIG. And, at the same time when the discharge body 5 is stopped, it falls to the stop end side in the same direction as shown in FIG. Further, the bar material A cut when the cutter 4 is returned is supported by the other bar material discharging portion 21b of the discharging body 5 as shown in FIG. 5, and when it stops, it drops to the return direction stop end side. As a result, the cut bar A is discharged to both ends of the reciprocating movement.

(Embodiment) FIGS. 1 to 8 show an embodiment of the bar A cutting apparatus of the present invention.

In FIG. 1, 1 is a hopper and 2 is a carrier. One side 10 of the hopper 1 is inclined inward from the top to the bottom, and the bottom 11 is made wide enough to accommodate only one bar A, and the bars 11 are aligned vertically in the bottom 11 one by one. So that
In addition, the stacked bar materials A are formed so as to naturally drop one by one from the bottom outlet 12.

A stirring pulley 13 is attached to the hopper 1, so that the bar A in the hopper 1 is agitated to prevent the bar A from clogging the bottom part 11 of the hopper 1, and the bar part A is arranged vertically in a line. I am allowed to do so. This stirring pulley
The same thing as the conventional one may be used for 13.

The carrier 2 conveys the bar A dropped from the hopper 1 by its own weight in the longitudinal direction thereof, and a conventional one may be used. The bar A conveyed by the conveyor 2 passes through the guide hole 16 of the guide bush 15 attached to the attachment block 14. Further, a slide groove 17 is formed on the front surface of the mounting block 14 in a direction intersecting with the transport direction of the bar A.

Reference numeral 3 shown in FIG. 1 denotes a stopper / switch which is turned on when the tip end a of the bar A hits. The stopper / switch 3 is provided in front of the guide bush 15 in the conveying direction of the bar A, and is separated from the bush 15 by a predetermined length of the bar A to be cut.

A cutter 4 shown in FIG. 1 has cutting blades 4a and 4b formed on both side surfaces in the width direction.

Reference numeral 5 shown in FIG. 1 is an ejector. The discharge body 5 is connected to the air cylinder 18. Also, the mounting block
It is arranged in 14 slide grooves 17 and can reciprocate along the groove 17 in a direction intersecting the conveying direction of the bar A by expanding and contracting the rod of the air cylinder 18. This discharger 5 is formed with a cutter mounting portion 20 for mounting the cutter 4, and laterally long openings 19a, 1 through which the bar A is extruded on both sides thereof.
9b is formed, and the inner peripheral surfaces of the openings 19a, 19b on the side of the cutter attachment portion 20 are used as bar material discharging portions 21a, 21b.

The cutter 4 is attached to the back surface of the cutter attachment portion 20 by a fixture such as a screw (not shown) so that the cutter 4 can reciprocate through the rod A. The cutter 4 is in contact with the groove bottom 17a of the slide groove 17 of the mounting block 14.

Further, a waste material feeding box 22 is provided below the guide bush 15 of the mounting block 14, and non-defective item feeding boxes 23a and 23b are provided on both sides of the waste material feeding box 22 in the moving direction of the discharge body 5. .

This cutting device is used, for example, as follows.

First, the bar A conveyed in the longitudinal direction by the conveying body 2 of FIG. 1 has a guide hole of the guide bush 15 as shown in FIG.
It passes through 16 and further projects forward through the opening 19a on the right side of the discharge body 5. When the tip a of the bar A hits the stopper / switch 3, the switch 3 is turned on and the air cylinder 18 of the air cylinder 18 is extended as shown in FIG. It is moved to the right (the direction of arrow z in the figure) intersecting with the transport direction of. As a result, the bar A is cut by the cutting blade 4a on the right side of the cutter 4 attached to the discharge body 5. At this time, since the back surface of the cutter 4 closes the front surface of the guide bush 15, the bar A is not sent any further forward.

The cut bar A is supported by the bar discharging unit 21a on the right side of the discharging body 5 as shown in FIG. 3, and is moved in the moving direction of the discharging body 5, that is, to the right. Eventually the air cylinder
The ejector 5 is also stopped when 18 extends to its forward end.
At this time, the cut bar material A supported by the bar material discharge portion 21a falls into the non-defective product box 23a on the right side as shown in FIG.

At this time, since the cutter 4 is disengaged from the guide hole 16 of the guide bush 15 as shown in FIG. When the switch 3 is turned on, the air cylinder 18 is contracted in the opposite direction to that of the previous time, and the discharge body is discharged. 5 is moved in the left direction (direction of arrow y in the figure) intersecting with the conveying direction of the bar A. As a result, the bar A is cut by the cutting blade 4b on the left side of the cutter 4, and the cut bar A is supported by the left bar discharging section 21b and moved in the moving direction of the discharging body 5, that is, the left direction. To be done. Eventually, when the air cylinder 18 contracts to its retracted end, the discharging body 5 is also stopped, and the cut bar A supported by the bar discharging section 21b is placed in the non-defective box 23b on the left side as shown in FIG. To fall.

By repeating this, the bar A is cut into a predetermined length one after another.

In order to change and adjust the cutting length of the bar A, the position of the stopper / switch 3 may be moved in the conveying direction of the bar A.

Further, when the bar A is successively cut into a predetermined length as described above, the remaining portion of the bar A may not reach the predetermined length. In this embodiment, as shown in FIG. 7, a bar material (waste material L) that is less than the predetermined length is pushed by the next bar material A and passes through the guide hole 16 of the guide bush 15, but the waste material L is a stopper. It does not hit the dual-purpose switch 3 and is eventually extruded to the next bar A, dropped into the waste material box 22 provided in front of the guide bush 15, and separated from the good bar A cut into the predetermined length. To be done.

(Effect of the Invention) The bar cutting device of the present invention has the following effects.

． The tip end a of the bar A, which is conveyed one by one from the hopper 1 by the conveyor 2, is a stopper / switch 3
When the switch 3 is turned on and the cutter 4 is turned on, the cutter 4 is reciprocated in a direction intersecting with the transport direction of the bar A,
By the cutting blades 4a, 4b formed on both sides in the moving direction,
Since the bar A having a predetermined length is cut twice when the cutter 4 moves forward and backward, the cycle time is shortened and workability is improved.

． The bar A cut into a predetermined length by the ejector 5 that reciprocates together with the cutter 4 is ejected to both ends of the reciprocal movement, so that the bar A (waste material L) less than the predetermined length is dropped to the center thereof. By doing so, a good bar A cut into a predetermined length
The workability is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the bar cutting device of the present invention, FIGS. 2 to 6 are front views showing the cutting state of the bar by the cutter of the same device, and FIG. 7 is the same device. A side view showing a processing state of a bar material (waste material) less than a predetermined length, FIG. 8 is a front view of FIG. 7, and FIGS. 9A to 9C are explanatory views of cutting / cutting processing of the bar material, The drawing is a perspective view of a conventional bar cutting device. 1 is a hopper 2 is a carrier 3 is a stopper / switch 4 is a cutter 4a, 4b is a cutting blade 5 is an ejector A is a bar

Claims (2)

[Scope of utility model registration request] 1. A conveyor 2 for conveying the rods A one by one in the longitudinal direction thereof, a stopper / switch 3 against which the rods A abut, and a reciprocating movement to both side faces in the movement direction at the time of forward and backward. A bar cutting device, comprising: a cutter 4 having two cutting blades 4a, 4b for cutting the bar A. 2. A bar material cutting device according to claim 1, further comprising a discharging member 5 which reciprocates together with the cutter 4 and discharges the cut bar material A.