JPS643656Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a staple supply device, more specifically, a staple hopper is integrally provided in the magazine of a nailing machine, and the staples in the hopper are delivered along the magazine to the injection port of the nailing machine. The present invention relates to a staple supply device that supplies the staples in the hopper to the ejection port by providing two staple pushers facing each other and moving the staple pushers alternately.

Generally, the staples used in a nailer for driving staples are made by connecting multiple staples in a series with adhesive.When driving, a series of staples is loaded into the magazine of the nailer and then , the staples are pressurized and fed toward the ejection port of the nailing machine by a staple pusher, and the staples supplied to the ejection port are ejected one by one by a drive driver until there are no staples in the magazine. When this occurs, the staple pusher is returned to its original position, new staples are supplied, and then the staple pusher is again pressed and fed.

On the other hand, with the recent automation of machine processing tools, it is desired that staple driving devices be automated and speeded up. However, in the conventional staple feeding method, as mentioned above, the staple pusher is The pressing action continues until the staples run out, and then the staple pusher returns to its original position when replenishing the subsequent staples. During this time, the staples are not supplied to the ejection port, so the stapling work is temporarily suspended. I had no choice but to do it.

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned drawbacks and, in particular, to propose a staple supply device that can continuously supply staples to the ejection port and perform nailing operations continuously without interruption.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1a and 1b, reference numeral 1 indicates the nailer main body. A magazine 2 is connected to the injection port 10 of the nailer main body 1, and a staple passage 11 into which a series or a plurality of staples 8 can be loaded is formed in the magazine 2. A staple hopper 3 is integrally connected to one side. The lower part of the staple hopper 3 is opened and faces the staple passage 11. Further, the rear end of the hopper 3 is formed to be openable and closable by a lid member 13, and a series of connected staples 8 are fed into the hopper 3 in a stacked state with the crown portion up and the foot portion down. After that, it is closed by the lid member 13. Further, among the staples 8 in the hopper 3, the lowest staple 8a is arranged on the staple passage 11 at the rear end of the magazine 2. Then, when this staple 8a moves along the staple path 11 to the injection port 10 side of the nailing machine and exits the hopper 3, the next stage staple 8b falls onto the staple path 11. The structure for supplying staples from the hopper 3 to the staple path is not limited to the above-mentioned natural fall type, as long as the staples can be automatically fed into the staple path, and may be fed by being pushed out using spring pressure or the like, for example. It may be hot.

Next, first and second staple pushers 4, 5 and cylinder devices a, a for driving the staple pushers 4, 5 are provided on both sides of the staple passage 11, respectively. This cylinder device a
consists of an air cylinder 15 and a piston rod 16, and each staple pusher 4, 5 is connected to the piston rod 1.
It is rotatably attached to the shaft pin 17 at the tip of 6,
The shaft pin 17 is biased toward the staple path 11 by a spring 21, and is rotated in a direction away from the staple path 11 by an external force opposite to the spring force of the spring 21. By driving the cylinder device a, the piston rod 16 expands and contracts, and the staple pushers 4 and 5 reciprocate. The overall stroke of the staple pushers 4 and 5 is divided into two parts, front and rear, with the first staple pusher 4 having a rear stroke and the second staple pusher 5 having a front stroke. , 5 alternately reciprocate along the staple path 11, respectively. Further, each of the staple pushers 4 and 5 is formed with an engaging protrusion 20 that engages with the rear end portion of the staple 8a.
An inclined surface 19 is formed from 0 to the rear end side.

The cylinder device a that drives the staple pushers 4 and 5 has first and second detection means ( (not shown)
It is activated by an activation signal from. These detection parts 6a and 6b are installed in the staple passage 11 near the front end of the operating range of each staple pusher 4 and 5, as shown in FIG. 1b. The first and second detection means detect the remaining amount when a predetermined number of staples 8 in the magazine 2 that have come out of the staple hopper 3 have been consumed, and detect the incident light when the staples 8 move and pass. The staple 8 depends on what is detected and the position of the staple pushers 4 and 5.
Any suitable known detection means may be used as required, such as one for detecting the remaining amount of . The detection means and the cylinder device a of each staple pusher 4, 5
After the rear end of the staple 8 in the staple passage 11 passes through each detection section 6a, 6b and the remaining amount of the staple 8 is detected, the detection means detects the one cylinder device a. A signal is sent to activate the cylinder device a.
is actuated, the staple pushers 4 and 5 with the piston rod 16 in the contracted state are driven to move backward while extending, and at the same time, the staple pushers 4 and 5 with the piston rod 16 in the extended state move forward while contracting. do. At this time, the subsequent staple 8 is fed toward the exit 10.

Here, the manner of use of the staple supply device having the above configuration will be explained.

First, the first staple pusher 4 is extended to remove the staple 8a at the bottom of the staple hopper 3.
The staple 8a is inserted into the injection port 1 by engaging the rear end of the staple 8a.
When the staple 8a is pressed and fed to the 0 side and enters the contracted state, the second staple pusher 5, which has been in the extended state, engages with the rear end of the staple 8a, causing the first staple pusher 4 to take its place. Then, the staple 8a is pressed and fed toward the injection port 10.

Next, when the first staple pusher 4 reaches the front end of its operating range, the detection means of the first detection section 6a detects the state and the cylinder device of the first staple pusher 4 is activated. drive a,
The staple pusher 4 moves backward, and after the previous staple 8a comes out of the hopper 3, it engages again with the rear end of the subsequent staple 8b that has fallen from the hopper 3 onto the staple path 11, and feeds the staple 8. The staple 8a continues to the rear end of the previous staple 8a. On the other hand, when a predetermined number of the staples 8 are driven, the second detection means detects the remaining amount of the staples 8 and
The cylinder device a of the staple pusher 5 is driven, and the staple pusher 5 is moved backward. At this time, the front end of the staple 8 fed by the first staple pusher 4 immediately connects to the rear end of the front staple 8, and both staples 8a, 8b
is continuously pressed by the first staple pusher 4. Then, the first staple pusher 4
reaches the front end of its operating range, the retracted second staple pusher 5 engages the rear end of the succeeding staple 8b, presses and feeds it instead of the first staple pusher 4, and When the actuation signal of the first detection means causes the first staple pusher 4 to
retreats again. Thereafter, the staples 8 in the hopper are sequentially fed to the exit port 10 in the same manner.

In particular, when the second staple pusher 5 is retracted, the oblique surface 19 of the engaging protrusion 20 engages with the side surface of the following staple 8b, and the spring 21 of the shaft pin 17
It rotates in the retreating direction to retreat from the staple passage 11 against the spring force of.

In this way, according to the staple supply device, the first staple pusher 4 and the second staple pusher 5 alternately reciprocate and move while complementing each other in one stroke. The operation is linked from the second staple pusher 4 to the second staple pusher 5, so that the same staple 8 can always be pressed and fed toward the ejection port 10.

It should be noted that the staple passage is not limited to being simply formed in a concave shape as in the example illustrated above.
For example, as in the example shown in FIG. 2, a staple guide 18 may be provided along the center of the concave staple passage 11. In the case of the example shown in FIG. 2, the staples are mounted across the staple guide 18.

Next, another example of the staple supply device will be described.

FIG. 3 shows an example in which first and second staple pushers 4 and 5 with the same stroke are provided at the same position on both sides of the staple passage 11. In this example, the first staple pusher 4 and the second staple pusher The pushers 5 are configured to be driven by cylinder devices a and a, similar to the staple pushers 4 and 5 described above, but each staple pusher 4 and 5 is driven from the front end to the rear end of the staple hopper 3. move, each moving approximately in opposite directions. In addition, each of the staple pushers 4 and 5 is
The detection means of the staple detection section 6 provided near the front of the hopper is activated by a signal issued when the rear end of the staple 8 is detected.

With the above configuration, the staples first supplied from the staple hopper 3 into the staple passage 11 are pressed by the first staple pusher 4 and fed toward the injection port 10 of the nailing machine. At this time, the second staple pusher 5 moves backward. When the first staple pusher 4 moves forward and the rear end of the staple is detected by the detection means of the detection unit 6, the first staple pusher 4 moves forward and is located at the rear end of the subsequent staple supplied from the staple hopper 3. The second staple pusher 5, which has been previously attached, moves forward to force feed the staple and connect it to the rear end of the front staple, and both the front and rear staples are pushed by the second staple pusher 5. In addition, in order to prevent the pressing of the staple on the injection port 10 side from being momentarily interrupted due to switching of the moving direction of the first and second staple pushers 4 and 5, both pushers 4 and 5 are moved before switching. It is preferable to set the actuation timing of the cylinder devices a, a so that the cylinder devices 5 and 5 move overlappingly in the direction of the injection port 10.

Next, the staple supply device shown in FIGS. 4a and 4b has first and second staple pushers 4 and 5 disposed opposite to each other on both sides of the staple passage 11, and these staple pushers 4 and 5 are pushed respectively. While connected to the springs 26, 26, the pushers 4, 5 are actuated alternately against the pusher springs 26, 26 by a common cylinder device a disposed in the intermediate portion. That is, the first
An engaging portion 27 is formed protrudingly below the second staple pushers 4 and 5, and an engaging pin 28 and the pin 2 are provided at the rear end of the cylinder device a.
Solenoid 2 that controls the movement of 8 alternately in the left and right direction.
9 is provided. The solenoid 29 and the cylinder device a are activated by an activation signal from the detection means of the detection unit 6.

According to the staple supply device described above, first, one staple pusher 5 is connected to the pusher spring 26.
When the rear end of the staple is detected by the detection section 6, the detection section 6 outputs an activation signal for the cylinder device a, and the staple pusher 5 is driven by the spring force of the staple pusher 5. retracts to engage the trailing edge of the trailing staple. The subsequent staple is pushed and fed toward the injection port 10 by the spring force of the pusher spring 26. While the staple pusher 5 is retracting, the staple pusher 4 continues to be urged toward the exit port 10 by the pusher spring 26. When a subsequent staple is detected by the detecting section 6, an activation signal for the cylinder device a is issued again, and the staple pusher 5 moves backward to carry out a staple replenishment operation. When the cylinder device a operates, the solenoid 29 causes the engagement pin 28 to protrude to either the left or right and engage the engagement portion 27 of the staple pusher 4 or 5 on the protrusion side, These staple pushers 4 and 5 are alternately driven backward. Note that the means for alternately driving the first and second staple pushers 4 and 5 by the common cylinder device a is not necessarily limited to using the solenoid 29. Other known alternate protrusion mechanisms may also be used. In this example as well, in order to prevent the pressing of the staple 8 on the injection port 10 side from being momentarily interrupted by switching the moving directions of the first and second staple pushers 4 and 5, the switching is performed. It is preferable to set the actuation timing of the cylinder device a so that both pushers 4 and 5 move in the direction of the injection port 10 in an overlapping manner.

As explained in detail above, the staple supply device according to the present invention includes a staple hopper that automatically supplies staples sequentially to the rear end side of the staple passage whose front end is connected to the injection port of the nailing machine, and The staple hopper is provided along both sides of the staple hopper and the ejection port so as to be reciprocally movable, and has an engaging protrusion that engages with the rear end of the staple, and is rotatable in the direction of retraction from the staple passage. The staple pusher is provided with two staple pushers, a remaining amount detection means provided at a predetermined position in the staple passage, and a cylinder device that reciprocates the staple pusher, the remaining amount detection means and With the cylinder device, while the one staple pusher is operating to press the staples toward the ejection port side, the other staple pusher is positioned at the rear end side of the operation that receives the supply of staples from the hopper, and the one By detecting that a predetermined remaining amount of staples fed by the staple pusher has reached a predetermined level, the other staple pusher starts pressing operation, and the one staple pusher starts its operation. This feature is characterized in that the operation is controlled so that it is positioned on the rear end side. Therefore, the operation of the staples automatically supplied from the hopper to the rear end side of the staple passage must be controlled by the remaining amount detection means and the cylinder device so that the two staple pushers alternately press the staples. This allows the staples to be fed one after another to the exit port of the nail gun. Therefore, the staple driving work is not interrupted, and work efficiency can be greatly improved.

[Brief explanation of the drawing]

FIG. 1a is a side view of a nailing machine including a staple feeding device according to the present invention, FIG. 1b is a sectional view taken along line A-A in FIG. 1, and FIGS. It is a sectional view showing another example in the same section as FIG. 1b, and similarly, FIGS. 4a and 4b are a sectional view and a side view of still another example. Code 1...Nailer main body, 2...Magazine, 4,
5... Staple hopper, 6a, 6b... Detection section, 8... Staple, 10... Injection port, 11...
... Staple passage, 15 ... Air cylinder, 16
...Piston rod.

Claims (1)

[Claims for Utility Model Registration] A staple hopper that automatically supplies staples sequentially to the rear end side of a staple passage whose front end is connected to an injection port of a nailing machine; Two screws are provided between the stapler and the ejection port so as to be reciprocally movable, have an engaging protrusion that engages with the rear end of the staple, and are rotatably disposed in the direction of retraction from the staple passage. comprising a staple pusher, a remaining staple amount detection means provided at a predetermined position of the staple passage, and a cylinder device that reciprocates the staple pusher; the remaining amount detection means and the cylinder device;
While the one staple pusher is pressing the staples toward the ejection port, the other staple pusher is positioned at the rear end of the operation that receives staples from the hopper, and By detecting that a predetermined remaining amount of staples that have been press-fed has reached a predetermined remaining amount, the other staple pusher is caused to start a pressing operation, and the one staple pusher is positioned at the rear end of the operation. A staple feeding device characterized in that the operation is controlled so as to cause the staple feeding to occur.