DE273559C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

Nailing machines are used to nail wood of a certain total thickness so far in the operation of this strength adapted in such a way that the stroke of the punch to the Driving in the nails carrying carriage is set for this purpose. It is coming now in the company it often occurs that the woods do not always have the same thickness. Consequently If the wood is thinner, the nail heads are thinner than for a certain wood thickness The set punch is not completely driven into the wood, while with one the normal thickness exceeding the thickness of the wood, the punches penetrate too far into the top wood, whereby this wood can easily be made to burst.

This drawback is remedied according to the invention in that the stamp carrier with its drive device is connected by a Kupphing, which when it hits the Stamp or a stop seated on the stamp carrier on the wood is released will. As a result, the stamp carrier remains at the moment the clutch is switched off stand in its respective position, so that the stamp attached to it no longer in penetrate the wood, while the drive device for the punch carrier its stroke can accomplish.

The drawing shows an embodiment of the subject matter of the invention with the in Question presented parts of a nailing machine.

Fig. Ι and 2 are sections through part of the nailing machine with the device according to the invention at different positions of the stamp. Fig. 3 is a section on a larger scale through the mounting of the crank pin of the drive device of the stamp carrier in this. 4, 5 and 6 show, in section along the line AB in FIG. 3, various positions of the main parts of the device.

The pieces of wood 2, 3, to be nailed together are on table 1 of the nailing machine. into which the nails 4 are to be driven by the punch 5. The stamps 5 are attached in the guided on the frame 6 of the machine stamp carrier 7, which is through a Driving rod 8 is connected to the pin 9 of a crank 11 seated on the drive shaft 10 is.

The upper pin 12 of the drive rod 8 is eccentrically mounted in two eyes 13, 14 of the stamp carrier 7 with bearing journals 15 and 16, respectively. On the protruding from the eye 13 end 17 of the pin 12 is a washer 18 and next to it a stop 19 is attached, while the other protrudes from the eye 14 End 20 of the pin 12 is surrounded by a coil spring 21, which with her one end in the journal 16 and with

Claims (4)

its other end is fastened in a cap 22 which is firmly seated on the eye 14. The disc 18 has a catch 23 in its surrounding area, into which a nose 24 of a double hebeis 25, 26 engages. With the arm 26 of this double lever, which is rotatable about a journal 27 mounted in the stamp carrier 7, a rod 28 is connected, which lies next to the stamps 5 and in the position of the device shown in full lines in FIG. 1 with its lower end is just as far away from the wood 3 as the lower ends of the punch 5. The stop 19 fastened on the end 17 of the pin 12 cooperates with a further stop 29 which is fastened to the frame of the machine. As soon as initiated by the crank mechanism 8, 9, 10, II, 12 «! Downward movement of the punch carrier 7 hits the lower end of the rod 28 on the upper wood 3, the nose 24 seated on the other end of the double lever 25, 26 is moved out of its detent 23. From the moment in which the nose 24 has completely stepped out of the catch 23 (FIG. 2), the punch carrier 7 is no longer taken along by the drive rod 8 because the pin 12 is decoupled from the punch carrier 7. The downward movement of the pin 12, which is still required up to the end of the stroke of the crank 11, is made possible by the fact that this pin can move on about its eccentric bearings 13, 15 and 14, 16. In this movement, the pin 12 is supported by the spring 21 which acts on rotation and which is fastened in the bearing pin 16. Up to the end of the stroke of the crank 11, the stop 19 moves into the position indicated by dotted lines in FIG. 2, in which it is located in the path of the stop 29 seated on the machine frame 6. This stop holds the stop 19 when the upward movement of the crank pin 9 begins, at the beginning of which the stamp carrier 7 is also lifted up again, until the detent 23 reaches the height of the nose 24 again, so that it is affected by the weight of the End 26 of the lever 25, 26 seated rod 28 \ vieder pressed into the catch 23. As a result, the punch carrier 7 is coupled again with its drive device 8, 9, 10, 11, 12, while at the same time the spring 21 is tensioned again. The spring 21 makes it possible that the eccentricity of the pin 12 against its bearing pin 15, 16, on which of course the permissible margin between the individual thicknesses of the pieces of wood to be nailed on the machine depends, can be given a small value corresponding to the practical needs, by the The rotation of the pin 12 required towards the end of the working stroke is supported in its eccentric bearings.This rotation of the pin 12 would only be possible with a relatively large value of this eccentricity with little friction and with little power loss, if the auxiliary force provided by the spring 21 was not involved. As from the position indicated in dotted lines in Fig. 1, in which the lower ends of the punch 5 and the rod 28 just hit the wood 3, and from the position shown in Fig. 2 with full lines, in which the uncoupling of the punch carrier 7 has just occurred from its drive device and thus its shutdown, the punches 5 have penetrated a small distance into the wood 3 after the rod 28 has been placed. This distance, which is the same for every total thickness of the woods 2, 3, can be changed as desired by making the rod 28 adjustable in length. If the lower end of the rod 28 is allowed to lead the stamps 5 by a certain distance, the penetration of the stamps into the upper wood 3 can be completely avoided. The further movement of the punch 5 after the rod 28 has been placed can also be effectively prevented by arranging a coupling between the punch carrier 7 and its drive device, which is triggered immediately at the moment the rod 28 hits the wood 3. Godfather ν t-An Proverbs: 1. Device for the automatic adjustment of the stamp carrier of nailing machines for wood of different thicknesses, characterized in that the punch carrier with its drive device is connected by a coupling, which is activated when the punch resp. a stop on the wood sitting on the stamp carrier is switched off, so that the stamp carrier with the star pin stops while the drive device completes its working stroke. 2. Apparatus according to claim 1, characterized by a stop (28) connected to the stamp carrier (7) and approximately at the level of the lower ends of the Nail stamp (5) is located and at one end (26) one mounted in the stamp carrier Double lever (25, 26) engages, -Its other end (24, 25) in a detent (23) one with the drive device (8,9,10,11,12) for the stamp carrier connected coupling part (18) engages and through the stop (28) from this Latch is pulled out, whereby the punch carrier and drive device are decoupled will. 3. Apparatus according to claim 1 and 2, characterized in that the completion the working stroke of the drive device (8, 9, 10, 11, 12) thereby made possible that the part (12) of the drive device connected to the coupling part (18) is mounted eccentrically rotatably in the punch carrier. 4. Apparatus according to claim 3, characterized by a rotation of the part (12) of the drive device mounted eccentrically in the punch carrier (7) acting spring (21). 1 sheet of drawings.