JP2006224355A - Breaking unit of nail driving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the braking unit for a nail driving machine capable of performing the driving test of a punch rod. <P>SOLUTION: The braking unit of the nail driving machine is composed of a front blocking part 24, a first cam 25, a second cam 26 and a handle part. The first cam is meshed with a safety slide rod 3 to suppress the slide rod while the second cam is inserted in a punch passage to come into contact with the nail entering the punch passage. When a nail cartridge is filled with nails, a retaining unit 2 is detached from the safety slide rod and a trigger for driving the nail 4 can be pulled. When it is detected that the cartridge becomes empty, the slide rod is suppressed to obstruct the pulling of the trigger. When the handle part is pushed, the first and second cams are rotated to the outside of the punch passage and the nail driving test can be performed even if the nail cartridge is empty. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a braking unit of a nailing machine, and more particularly, to a rotary retainer that can detect whether or not a nail is present in a nailing machine and whether a safety slide rod is locked or disconnected. The present invention relates to a braking unit using a ning unit.

Prior art nailing machine braking unit disables nailing machine trigger when nail cartridge is empty, user is reminded to reload nail in puncher .
A number of nails as described above are aligned and inserted into the nail cartridge. These nails are pushed one by one into the punch passage by a nail pusher. When the user pulls the trigger, the nail of the punch passage is struck by the punch rod and embedded in the workpiece. The trigger has an inner plate and a trigger stem, and the trigger stem is controlled by a safety slide rod having a lateral piece. One end of the safety slide rod is outside the nail outlet and is connected to a fastener guide that holds the surface of the workpiece when the nail is driven into the workpiece. The safety slide rod is tilted with respect to the inner plate so as to push the trigger stem.

  A conventional punch stop is basically a braking unit attached to a nail pusher and a safety slide rod so that when all the nail is consumed, the nail pusher is a safety slide rod. The safety slide rod cannot touch the inner plate in the trigger. Since the trigger becomes invalid, the user is reminded to refill the nail. However, this technique cannot detect whether there are any nails remaining in the puncher. In addition, the operation of the nail pusher is difficult to control and there is a problem that the nail gets tangled.

  Further, the invention disclosed in US Pat. No. 6,267,284 utilizes a latch having a main cam and a second cam, where the second cam holds the fastener guide when there is no nail in the punch passage. The punch rod and punching function can be disabled. The main cam is pushed by the nail of the punch passage and rotates the latch to a position where the punch rod can be operated.

However, the invention has the following drawbacks.
1. The swing latch does not have a flexible part and a manual control part for the swing position of the latch. Since there are no flexible parts, there is a shortage of precision mechanisms to return the latch to its original position. When the punch passage is empty and the fastener guide is not engaged with the workpiece, the latch swings and cannot show the braking state. When the punch passage is empty, it is impossible to remove the punch rod and perform the nail driving test.
2. The cross section of the main cam is triangular, and high-accuracy swing is required so that the punch rod does not interfere with the punch passage. After a long period of use, the main cam is easily hit by the punch rod.
3. The swing latch is in the nose portion to hold the fastener guide and the arcuate second cam. The nose and the second cam are used to hold the fastener guide instead of the safety slide rod, which is a conventional nailer with a safety slide rod with a bent transverse piece connected to the fastener guide Is different. Therefore, it is not easy to use the invention for the structure of an ordinary nailer.
US Pat. No. 6,267,284

The main object of the present invention is to provide a braking unit for a nailing machine with a safety slide rod with a transverse piece, so that when the nail cartridge is empty, the nail is removed. The striking mechanism is stopped. The braking unit can detect if there is a nail in the nailing machine, and can stop and remove the safety slide rod.
The second object of the present invention is to provide a nailing machine braking unit that can remove the function of stopping the safety slide rod so that the punch rod can be tested along the punch passage. That is.

To achieve the above object, the present invention provides a braking unit for a nailing machine with a safety slide rod having a transverse piece. The braking unit is a rotary retaining unit that is mounted for rotation on the side of the punch passage of the nailing machine and includes the following. A front blocking portion capable of meshing with a lateral piece of the safety slide rod; and a first cam connected to the front blocking portion through the inclined surface, the inclined surface comprising the retaining unit A first cam that can be engaged with a lateral piece of the safety slide rod to move away from the punch passage; and a second cam connected to the first cam through a recess, the second cam being A second cam that can be inserted into the punch passage so as to contact a number of nails and can be pushed by the nail to promote rotation of the first cam and the front blocking portion; A handle portion formed at the lateral end of the retainer is pushed to rotate the first cam and the second cam of the retaining unit outside the punch passage.
The various objects and advantages of the present invention may be further understood with reference to the accompanying drawings and the following detailed description.

  The braking unit of the present invention stops the nail driving mechanism when the nail cartridge is empty. The braking unit can detect if there is a nail in the nailing machine, and can stop and remove the safety slide rod. In addition, a punch rod hammering test was made possible.

  FIG. 1 shows a preferred embodiment of the present invention as a braking unit of a nailing machine. It includes a retaining slot 17 formed on the cover plate 11 attached outside the punch passage 13 and an outer cover attached on the cover plate 11 to protect the retaining slot 17. 18 and a retaining unit 2 rotatably connected to the outer cover 18 by a shaft 22 through a pair of rotating shaft holes 181 provided on both sides of the outer cover 18. As a result, the retaining unit 2 can rotate so that one end thereof is inserted into the punch passage 13. At the same time, both side walls of the outer cover 18 are provided with a passage slot 19 so that the transverse piece 33 of the bent safety slide rod 3 passes through.

  The safety slide rod 3 of the nailing machine 1 described above has a meshing portion 32 at one end, and can push the inner plate 101 of the trigger 10. The other end of the safety slide rod 3 is connected to a pressing rod 34 through a knob 31 for adjusting the depth of the nail. The end of the pressing rod 34 forms a fastener guide 35, which is outward from the bottom side of the nail outlet 15, as shown in FIG. In order to hit the nail, as shown in FIG. 6, the fastener guide 35 operates to press the workpiece 5, the pressing rod 34 moves the lateral piece 33 of the safety slide rod 3, and the engagement portion 32 is raised. . In the reverse process, as shown in FIG. 1, the fastener guide 35 is separated from the surface of the workpiece 5, and the lateral piece 33 of the safety slide rod 3 and the meshing portion 32 are returned to the initial state. The transverse piece 33 is an intermediate bent portion of the safety slide rod 3 and is inserted through the passage slots 19 in the walls on both sides of the cover plate 11. Since the fastener guide 35 is connected to the safety slide rod 3, the lateral piece 33 can move together along the passage slot 19.

  As shown in FIG. 2, the retaining unit 2 includes a front blocking unit 24, a first cam 25, and a second cam 26. There is a recess 27 between the first cam 25 and the second cam 26. The first cam 25 is connected to the front blocking part 24 through the slope 252, and the lateral piece 33 moving upward in the passage slot 19 is connected to the slope 252 or the front surface as shown in FIGS. 3 and 4. The blocking part 24 is pushed.

The front end of the second cam 26 is a contact surface 261, which can be inserted into the punch passage 13 in order to detect the nail 41 remaining unused as shown in FIG. Therefore, the retaining unit 2 rotates by an angle corresponding to the thickness of one nail. Furthermore, the second cam 26 can detect whether there are still nails in the punch passage 13. If there is no nail, the retaining unit 2 does not rotate.
The retaining unit 2 further includes a protrusion 23 on which a spring 21 is provided. The spring 21 is sandwiched between the retaining unit 2 and the outer cover 18 (as shown in FIG. 3) so that the retaining unit 2 can be returned to the initial position. Furthermore, the spring 21 can be replaced by a torsion spring, an inner plate or other flexible unit that can provide the restoring force. Among them, the protrusion 23 of the retaining unit 2 is replaced with another holding structure such as a slot, a hook, or a rib with a protrusion according to the structure of the selected flexible unit. Furthermore, in a preferred embodiment, a torsion spring is selected and provided on the shaft 22 as a flexible unit attached to the retaining unit 2. Therefore, any flexible unit (and associated structure) is within the technical field of the present invention as long as it has the function of turning the retaining unit 2 to the initial position.

Next, the application of the present invention will be described as a nailing machine braking unit.
As shown in FIG. 3, when the nail cartridge 14 of the nailing machine 1 does not contain the nail 4, the elastic nail pusher 16 has not yet touched the nail 4. In other words, there is no nail 4 in the nail cartridge 14 and no nail 41 in the punch passage 13. The retaining unit 2 moved by the spring 21 pushes the contact surface 261 of the second cam 26 so as to touch the bottom wall of the punch passage 13. That is, the retaining unit 2 rotates and the front blocking portion 24 comes to a position above the lateral piece 33 to prevent the safety slide rod 3 from rising. As a result, the fastener guide 35 cannot move even if it is pressed against the surface, so that the engaging portion 32 of the safety slide rod 3 does not touch the inner plate 101. Thus, when the user pulls the trigger 10, the inner plate 101 does not move the trigger stem 102 for initiating nail driving, so the user is aware of refilling the nail 4.

  When the plurality of nails 4 are filled in the nail cartridge 14, the nails 4 are guided to the punch passage 13 by the nail pusher 16 as shown in FIG. 4. The nail 41 in the punch passage 13 pushes the contact surface 261 of the second cam 26 of the retaining unit 2 and rotates the retaining unit 2 by an angle corresponding to the thickness of the nail. As a result, the slope 252 of the first cam 25 of the retaining unit 2 comes on the safety slide rod 3 so that the safety slide rod 3 can contact it. As shown in FIG. 5, when the user lightly presses the fastener guide 35 against the surface of the workpiece 5, the pressing rod 34 connected to the fastener guide 35 moves the lateral piece 33 of the safety slide rod 3, and the first cam 25, the retaining unit 2 moves, and the second cam 26 moves away from the punch passage 13. When the user strongly presses the fastener guide 35 against the surface of the workpiece 5, the lateral piece 33 of the safety slide rod 3 moves from the slope 252 of the first cam 25 to the recess 27 (as shown in FIG. 6). As the spinning unit 2 turns further, the second cam 26 moves away from the punch passage 13, and the second cam 26 no longer obstructs the movement of the punch rod 12. At the same time, the meshing portion 32 of the safety slide rod 3 meshes with the inner plate 101 in the trigger 10 and moves upward. As a result, the user can pull the trigger 10, the trigger stem 102 is activated, and then the punch rod 12 is moved to strike the nail 4.

  In other words, when the nail 4 and the nail 41 are used up, the retaining unit 2 moved by the spring 21 returns to its original shape as shown in FIG. In this form, the safety slide rod 3 does not touch the inner plate 101 in the trigger 10, and the user cannot pull the trigger 10 for moving the inner plate 101. Of course, the trigger stem 102 does not start. This makes the user aware of the refill.

  Furthermore, in another preferred embodiment (shown in FIG. 7), there is a handle portion 28 on one side of the retaining unit 2 and projects out through the slot 182 of the outer cover 18 so that the user can remove the retaining unit 2. It can be turned around the axis 22. Therefore, the first cam 25 and the second cam 26 of the retaining unit 2 move and leave the punch passage 13 as shown in FIG. Thus, the user can pull the safety slide rod 3 and the trigger 10, move the punch rod 12 along the punch passage 13, and perform a punch test.

So far, we have specifically described the technique of using a retaining unit to detect nails in nailers. The nailing function is automatically limited when the punch passage is empty. Furthermore, such a braking function is also limited.
Furthermore, the outer cover 18 of the retaining unit 2 is not a necessary part of the present invention. The rotating shaft of the retaining unit 2 according to the present invention may be installed on support portions formed on both sides of the cover plate 11. In this case, the retaining spring 21 is installed on the support portion in order to achieve the return.

  Obviously, there are many variations to the invention described herein. Such modifications do not depart from the spirit and scope of the present invention, and all such modifications by those skilled in the art are within the scope of the following claims.

It is a side view of the nailing machine by this invention for demonstrating the position of a trigger, a safety slide rod, a retaining unit, and an exterior. 1 is a perspective view of a braking unit of a nailing machine according to the present invention. FIG. 6 is a partial cross-sectional view for explaining the position of a braking unit in a nailing machine according to the present invention, and when the nail cartridge is empty, the second cam of the retaining unit is located at the bottom of the punch passage. It is the figure which has touched the wall and has stopped the blocking part of the front of a retaining unit so that a safety slide rod may not raise. In another partial cross-sectional view according to the present invention, the nail cartridge is loaded, the nail is pushed into the punch passage by the nail extruder, and the second cam of the retaining unit moves up to rotate the retaining unit. FIG. 5 is a diagram in which the inclined surface of the first cam is engaged with the lateral piece of the safety slide rod. In another partial cross-sectional view according to the present invention, the fastener guide is lightly pressed against the surface of the workpiece, the lateral piece of the safety slide rod touches the inclined surface of the retaining unit, and the second cam is out of the punch passage. FIG. In another partial cross-sectional view according to the present invention, the fastener guide is pressed strongly against the surface of the workpiece, the retaining unit is subjected to considerable swinging, and the second cam is moved away from the punch passage so that the safety slide rod FIG. 4 is a diagram for operating the nail driving by pushing the inner plate in the trigger. FIG. 6 is another partial cross-sectional view according to the present invention, in which a handle portion is formed on one lateral side of the retaining unit. FIG. 8 is another sectional view according to FIG. 7 in which the handle portion is pulled and the second cam of the retaining unit is separated from the punch passage.

Explanation of symbols

2 Retaining unit 3 Safety slide rod 4 Nail 10 Trigger 13 Punch passage 14 Nail cartridge 19 Passing slot 21 Spring 24 Front blocking part 25 First cam 26 Second cam 26
27 Concave portion 32 Engagement portion 32
33 Horizontal Fragment 33
34 Push rod 34
101 Inner plate 252 Slope 261 Contact surface

Claims (7)

A braking unit as a rotary retaining unit provided to rotate to the side of the punch passage of the nailing machine.
A blocking part on the front surface which can be engaged with a lateral piece of the safety slide rod;
A first cam connected to the blocking portion of the front surface through an inclined surface having an inclined surface capable of meshing with a lateral piece of the safety slide rod so as to separate the retaining unit from the punch passage;
It is connected to the first cam through the recess and can be inserted into the punch passage so as to touch the plurality of nails of the punch passage, and is pushed by the nail to rotate the first cam and the front blocking portion. A second cam to be activated;
A handle portion that is formed at one end of the retaining unit and pushes the first and second cams of the retaining unit to rotate out of the punch passage;
A nailing machine braking unit characterized by having a safety slide rod with a horizontal piece. The braking unit for a nailing machine according to claim 1, wherein the retaining unit is rotatably attached to an outer cover outside the punch passage. 3. The nailing machine braking unit according to claim 2, wherein the exterior cover is attached to a cover plate on one side of the punch passage. 4. A nailing machine braking unit according to claim 3, wherein a cover plate is provided with a retaining slot for guiding a second cam of the retaining unit entering the punch passage. 4. The nailing machine braking unit according to claim 3, wherein the walls on both sides of the outer cover are each provided with a passing slot so as to accept the movement of the transverse piece of the safety slide rod. 4. The nailing machine braking unit according to claim 3, wherein a tip of a wall of the exterior cover is provided with a slot for passing a handle portion. 2. The nailing machine braking unit according to claim 1, wherein the concave portion can accommodate a lateral piece of the safety slide rod.