JPH0616663Y2 - Driving machine - Google Patents

Description

[Detailed Description of the Invention] [Field of Use of the Invention] The present invention relates to a driving machine for driving a connecting stopper in which some stoppers are overlapped.

[Background of the invention]

FIG. 7 shows a conventional driving tool, in which compressed air flows into the upper part of the striking piston 3 which reciprocates in the cylinder 2, whereby the striking piston 3 rapidly descends in the cylinder 2 and the pusher is pushed. The coupling stopper 10 which has been pushed by 12 and already fed into the injection port 5 is driven. As shown in FIG. 8, the connecting stopper 10 used in the present driving machine is connected by a connecting member 21 made of plastic or the like. The connecting stopper 10 is driven into the driven member by the driving machine. In order to store a large amount of connecting stoppers 10 in the magazine 9 at a time, it is desirable that the pitch 22 of the connecting stoppers 10 is smaller. Therefore, in order to make the pitch 22 as small as possible, the connecting stopper 10 in which the rear portion of the head portion 19 of the stopper overlaps the front portion of the head portion 19 of the stopper connected to the rear portion of the stopper is common. . For this reason, as shown in FIGS. 8 and 9, the driver 4 integrally connected to the striking piston 3 drives the head stopper 19 as shown in FIGS. The cross-sectional shape of is usually half-moon shaped. However, since this type of driver 4 has a complicated cross-sectional shape, the number of manufacturing steps is heavy and the productivity is low.
Further, since the overlapping portion of the head portion of the connecting stopper 10 has a half-moon shaped cross section, the sectional area occupied in the same injection port 5 is smaller than that of a driver having a circular cross section, and when the connecting stopper 10 is driven. Since the area of contact with the head portion 19 of the stopper was small, there was a defect that strength and wear resistance were low.

[Purpose of device]

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, improve the strength and wear resistance of the driver of this type of driving machine, and provide an inexpensive driver with good productivity.

[Outline of device]

The present invention is, in a driving machine using a connecting stopper in which part of nail heads are overlapped with each other, in a portion in which the head of the head stopper does not overlap with the next stopper, that is, in the head of the head stopper. Focusing on hitting with a driver with about half of it in the injection port, a stopper that restricts the amount of nail head entering the injection port is provided in the injection port, and the shape of the guide surface that guides the nail head of the injection port Is devised.

[Example of device]

The present invention will be described in detail with reference to an embodiment shown in FIGS. In FIG. 1, a striking piston 3 rotatably supported in a striking cylinder 2 arranged in a housing 1 is integrally connected with a driver 4 having a circular cross-sectional shape. At the lower part of the housing 1, there is installed a fastener driving portion 6 that guides the reciprocating movement of the driver 4 and forms an injection port 5 having a diameter substantially equal to that of the driver 4. The fastener driving portion 6 is a fastener head. A head guiding wall 8 that is inclined toward the center of the ejection port 5 is formed near the entrance 7. The coupling stopper 10 loaded in the magazine 9 is pushed from the rear by the pusher 12 which is constantly pulled toward the ejection port 5 side by utilizing the restoring property of the constant force spring 11.

On the other hand, as shown in FIGS. 2 and 4, a stopper locking member 14 rotatably supported by a pin 13 at a right angle to the traveling direction of the stopper 10 is provided in the stopper pushing-out portion 6. The spring 16 constantly urges the leg portion 16 in the direction of the ejection port 5 from the back portion to project the leg portion 16 into the ejection port 5. Figure 2,
As shown in FIG. 3, the front end stopper 17 of the connecting stopper 10 has its shaft portion locked by the leg portion 16 of the stopper locking member 14, so that the head portion 19 of the second stopper 18 is projected. Do not enter the exit 5. Further, the head portion 19 of the head stopper 17 is locked in a state in which the head portion 19 is approximately in the injection port 5.

In this state, half of the head portion 19 of the head stopper 17 inside the ejection port 5 is hit by the driver 4, and the back surface of the head portion 19 of the head stopper 17 contacts the head guide wall 8, The head stop 17 is guided so as to be perpendicular to the member to be driven and moves to the center of the ejection port 5, and the driver 4 is stopped by the head stop 17
When the tool is driven into the driven member, the leading end stopper 17 is
Since it is completely inside, the driver 4 hits the stopper 17 with the entire surface of its tip. Further, as shown in FIG. 5, the leg portion 16 of the stopper locking member 14 is pushed out of the ejection port 5 by the head 19 of the head stopper 17 and the driver 4 which are descending in the ejection port 5.

Subsequently, as shown in FIG. 6, when the driver 4 hits the head stopper 17 and then returns to the top dead center, first, the stopper engaging member 1
4 is disengaged from the side of the driver 4 and the side surface of the driver 4, and the spring 1
The leg portion 16 of the stopper engaging member 14 is driven by the force of
Project inward. At this time, the head 19 of the second stopper 18 is prevented from entering the injection port 5 by the side surface of the driver 4.

Further, the driver 4 rises, and the head 19 of the second stopper 18
Is disengaged from the side surface of the driver 4 and the second stopper 18 is released.
To enter the injection port 5. Here again the second stop 1
The shaft portion of 8 is locked by the leg portion 16 of the stopper locking member 14 to be in the state shown in FIG.

[Effect of device]

According to the present invention, the advancement position of the leading end stop into the injection opening is restricted by the stop locking member at the time of driving to prevent the head of the second stop from entering the injection opening. A driver having a circular cross-sectional shape having a diameter equal to that of the bore can be employed, and therefore, it is possible to provide a driving machine having a driver which has good productivity but is inexpensive and which has excellent strength and wear resistance.

[Brief description of drawings]

FIG. 1 is a vertical side view showing an embodiment of the driving tool of the present invention, FIG. 2 is an enlarged view of the fastener driving portion of FIG. 1, and FIG. 3 is a sectional view taken along the line AA of FIG. 4 to 6 are sectional views taken along the line BB of FIG. 2, in which FIG. 4 shows a state before the driver drives the fastener, and FIG.
FIG. 6 is a state diagram when the driver is driving the stopper, and FIG. 6 is a state diagram showing an intermediate process in which the driver is driving the stopper and rising. FIG. 7 is a vertical cross-sectional side view of a conventional driving tool, FIG. 8 is an enlarged view of the fastener driving portion of FIG. 7, and FIG. 9 is A- of FIG.
A sectional view taken on line A is shown. In the figure, 1 is a housing, 3 is a striking piston, 5 is an ejection port, 6 is a stopper ejecting portion, 7 is a stopper head inlet, 8 is a head guide wall, 9 is a magazine, 10 is a connecting stopper, Reference numeral 14 is a stopper locking member, 17 is a head stopper, and 19 is a head.

Claims (1)

[Scope of utility model registration request] 1. A head stopper of a plurality of connecting stoppers connected to each other via a connecting member such as plastic so that the stopper heads are partially overlapped with each other, is fed into the injection opening, and reciprocates in the injection opening. It is a driving machine in which the leading stops fed into the injection port by a moving striking piston are struck one by one, and is provided rotatably in a direction substantially perpendicular to the feeding direction of the stops, Protrudes into the ejection port and locks at least the shaft portion of the leading end stop so that a part of the head portion of the leading end stop is located inside the ejection port so that the head portion of the second stopper enters the ejection port. Is provided, and a stopper locking member that is pushed out of the ejection opening during the driving process is provided, and a head guide inclined toward the center of the ejection opening near the entrance of the stopper head near the ejection opening. A driving machine characterized by forming a wall.