JPS6339022Y2 - - Google Patents

Description

[Detailed description of the invention] This invention stores a row of continuous needle rods in which flat straight needles are arranged side by side in a roll form in a magazine case, bends the continuous straight needles into a downward U-shape, and then drives the needles. The present invention relates to a staple driving device in a staple tacker.

Conventional staple tatchers use a continuous row of downward U-shaped needles arranged side by side in a magazine case, so the number of staples that can be loaded is extremely small, ranging from 100 to 125.

Therefore, the new roll stable is made by arranging the needles in their unbent form, that is, by arranging flat straight needles side by side, and pasting synthetic resin thin film tape on one side of the central part of the needle rod row or on both the front and back sides. Roll up the needle rod row, make it into a roll, and load it into the magazine case. In order to efficiently drive staples continuously in a staple tatker, it is necessary to connect as many staples as possible, bend them in a downward U-shape from a flat straight staple, and feed them into the driving path, thereby making it easier to drive and bend the staples during the driving operation. In addition, the bend must be made at right angles. Furthermore, since bending is performed at the same time as driving, the screwdriver biting in the bent portion impedes smooth operation.

Therefore, the present invention is to easily and reliably form a right angle bend by back-striking a flat straight needle during the driving operation, and to make the driving operation smooth by forcibly returning the drive bit after bending. It is.

Hereinafter, the drawings showing the embodiments of the present invention will be described. Figure 1 is a cross-sectional side view of the staple taker, in which A is the tack car body, and a driver guide plate is attached to the lower front wall. , fixing the side supports 2 on both the left and right sides and incorporating the needle feeding device B between the side supports 2,
The rail 3 of the magazine unit C is slidably and detachably attached to the lower surface of the staple feeding device B to constitute a staple tacker. A driver guide groove and a needle passage groove are vertically continuous on the inner wall surface of the driver guide plate 1, and a notch is cut out on both left and right sides of the front end surface of the rail 3 that faces the needle passage groove, and a groove is cut out at the center of the upper edge. A bending base part 4 is provided leaving a protruding part a little more than one width of the flat straight needle. A feed body 5 fixed to the side support 2 is provided on the upper surface of the rail 3 with a gap between the flat and straight needles, and the front end surface of the body 5 is brought into contact with the driver guide groove.

As shown in the exploded perspective view of FIG. 3, the feed body 5 has a substantially semicircular recess 6 on the upper surface at its front end, and a channel 7 with an L-shaped side surface extending from the front end surface to the lower surface. A shaped back punch 8 is fitted, and the rear end is attached with a pin 9 to allow pendulum movement. The back punch 8 has a front end 8b of a horizontal portion 8a on the bending base portion 4 of the rail 3, and an upper end 8d of the vertical portion 8c slightly protrudes into the recessed portion 6. Reference numeral 10 denotes a guide portion projecting from the edge of the channel 7. Reference numeral 11 denotes a driver piston, which can move the cylinder sleeve 12 in both directions. Reference numeral 13 designates a drive bit which is slidable in the driver guide groove and the needle passage groove of the driver guide plate, and has a bend forming recess 13a having a bending width of a flat straight needle downward from approximately the middle on the rear surface. A protruding driving part 13b having the same width as the bending recess 13a is provided at the lower end. The drive bit 13 is lowered as the bend forming recess 13a fits on the outside of the guide section 10 of the channel 7, and at the bottom dead center of the driver piston 11 fits on both sides of the bend base section 4 of the rail 3, so that both sides Create a needle-thick space between the sides. In FIG. 1, 14 is a damper, and 15 is a damper piston, which is attached to the inner wall of the bottom cover 16 of the Tatsuka body A so as to be vertically slidable by a certain distance. A small diameter convex portion 1 is provided on the lower end surface of the damper piston 15.
5a protrudes from the center hole 16a of the bottom cover 16 into the concave portion 6 of the feed body 5 and faces the upper end 8d of the lower back punch 8.

Next, we will outline the operating mechanism of the staple tatcher.
The needle driving and bending operations with the above configuration will be explained. The vent hole (A) is connected to a separate air operator or a solenoid valve, and inside the cylinder body (A) communicates with the upper chamber (C) of the head valve and the lower chamber (D) of the damper piston. B is an air passage. When the operation signal is set to the normal state, the air in the upper chamber C of the head valve becomes zero, the air pressure in the air chamber E causes the head valve to move upward, and the driver piston 11 suddenly descends.

On the rail 3, the tip portion of the continuous flat straight needle supplied from the magazine case 17 is bent and released.
It is set when it reaches this point. When the driver piston 11 descends, the lower end shoulders 13c of the bending recess 13a of the driver bit 13 abut on both left and right sides of the flat straight needle on the bending table 4 and bend the needle along both sides of the bending table 4. At the same time as the piston 11 descends, since the vent A and the damper piston lower chamber D communicate with each other, the pressure in the vent A becomes zero, and the piston 11 hits the damper 14 at the bottom dead center, and the downward impact force causes the damper piston 15 to will bottom out, and at this time the upper end 8 of the back punch 8
In order to press d, the back (center) of the flat straight needle on the bending table 4 is struck to raise a back spring and form a downward U-shaped driving needle that is bent at right angles from the flat straight needle. When the driver return signal is activated, the needle feeding device operates and the driving needle is sent from the bending table 4 to the driver guide groove, and then pushed into the driving part 13b of the drive bit 13 and driven in when the piston descends next time. . When a driver return signal is sent, air is supplied from the vent port A, the head valve is lowered, and the air in the cylinder sleeve interior 4 is disposed of through the gap between the exhaust valve and the head cover. At the same time as the disposal, the damper piston 15 is forcibly pushed up by the air pressure in the lower chamber of the damper piston. Since the driver piston 11 butts against the damper piston 15, the damper piston 1
5, the driver piston 11 is also pushed up, and the bending forming recess 13 is pushed up from the downward U-shaped driving needle.
Drive bit 1 that occurs during bending operation by pulling up a
Make the initial withdrawal from the bite of 3. Thereafter, the driver piston 11 is raised to the top dead center by the residual air in the air chamber. Note that 18 is a stopper finger that prevents the needle from returning. 19 is a feed piston, 20 is a feed slide, and 21 is a feed finger for feeding the needle.

As described above, in this invention, the flat straight needle at the front end of the rail bends the U-shaped driving needle downward by the bending concave part at the bending table part, and moreover, when bending, the back of the flat straight needle is hit by a back punch. Therefore, at the same time, a complete driving needle bent at right angles is made, the driving part performs the driving operation smoothly and continuously, and the damper piston moves upward at the beginning of the return movement of the piston to forcibly move the piston. Since it is pushed up, the drive bit can be released from biting that occurs during bending operations, allowing for smooth driving operations.

[Brief explanation of the drawing]

FIG. 1 is a side view of the staple tacker with a portion cut away, FIG. 2 is a partial sectional view during driving, and FIG. 3 is an exploded perspective view. A...Tatsuka body, B...Needle feeding device, C
...Magazine unit, 1...Driver guide plate, 3...Rail, 4...Bending base, 5...
Feed body, 8... Back punch, 11...
Driver piston, 12... cylinder sleeve,
13...driver bit, 13a...bending forming recess, 15...damper piston.

Claims (1)

[Scope of utility model registration request] Facing the driver groove of the driver guide plate 1, the rail 3 of the magazine unit C is provided with a bending base portion 4 protruding from the bending width of a flat straight needle, and the feed body 5 of the needle feeder B is provided with an L-shaped bending base portion 4 on the upper surface of the rail. The rear end of the back punch 8 is pivoted so as to be swingable, and the L-shaped front end of the back punch 8 is placed on the bending table 4, and the upper end 8d of the back punch 8 is protruded from the feed body 5 to the lower side of the driver piston 11. Further, the driver bit 13 having a driving part 13b at the lower end and moving backward in the driver groove is provided with a bending forming recess 13a that fits into the bending table part 4 on the upper rear surface of the driving part 13b, and The driver piston 11 is installed at the bottom of the cylinder sleeve 12 on which the driver piston 11 slides.
1. This flat straight needle driving device for a staple tacker is provided with a damper piston 15 that bottoms out the upper end of the back punch 8 at the bottom dead center of the stapler and pushes the piston upward at the beginning of the piston's return movement.