JPS6341714B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a driving machine for fastening parts, which is provided with a shaft, comprising: a discharge passage for movably guiding a power-driven driving rod between a rest position and a driving position; The present invention relates to a type having a dividing mechanism which engages between an opening magazine and a shaft in a locking position and releases said shaft in a release position, and a holding device arranged in a discharge passage.

A driving machine of the type mentioned above is used for driving loose fixing elements such as nails, screws, pins, etc., which are prepared in a magazine connected to the driving machine. Furthermore, it is known to provide a dividing mechanism near the discharge passage, said dividing mechanism engaging between the shafts of the first and second securing elements and after driving the first securing element. to release the second fixing member,
Said second fixing member can reach into the discharge passage.

However, since the heads of the fixing members have different diameters, the shaft spacing may also vary. Therefore, in extremely unfavorable cases, the dividing mechanism can come into contact with the shaft of the fixing member.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a dividing mechanism which allows reliable division of the securing element even if the heads of the securing element have different diameters.

This problem is solved according to the invention in that the dividing mechanism has a dividing tip, and the distance between the dividing tip and the discharge channel is variable.

Advantageous embodiments of the invention are defined in the second patent claim.
and Section 3.

Furthermore, by virtue of the fact that the dividing mechanism can be held in its released position, it is also possible to drive in fastening elements, such as nail strips or screw strips, in the form of connected fastening element strips, by means of the driving machine.

The driving machine according to the invention can therefore be used not only for separate fastening elements with different head diameters, but also for fastening elements that are connected to form a fastening element strip.

The invention will now be explained with reference to the illustrated embodiment.

As illustrated in FIG.
A cylinder 2 is arranged therein, in which a percussion piston 3 driven by compressed air is slidably mounted. The percussion piston 3 is held in its rest position, which is illustrated in dashed lines in FIG. 1, by a rubber-elastic locking device 4. A connecting hose 5 as well as a hollow grip 6 of the casing 1 are used to supply pressurized air from a pressurized air source (not shown).

The release valve 7 is operated only when the trigger lever 8 as well as the workpiece detection element are moved from the rest position to the working position. A tube slide 9, arranged concentrically with respect to the cylinder 2 in a known manner by means of a release valve 7, allows pressurized air to reach the percussion piston 3.
reaches into the cylinder 2 above the striking piston 3
is moved to the working position shown in dashed lines or the compressed air is then discharged from the cylinder chamber again.

Cylinder 2 for the return stroke of the striking piston 3
An air reservoir 10 is provided which surrounds the percussion piston 3 and is filled with pressurized air during the working stroke via a bore 11 provided in the cylinder 2, the pressurized air being directed above the percussion piston 3. After the pressurized air has been discharged from the cylinder chamber present in the cylinder chamber, it reaches through the hole 12 beneath the percussion piston 3 and returns it to its rest position.

A cylinder leg 13 with a discharge channel 14 is connected to the housing 1 by means of a screw, in which a driving rod 15 connected to a percussion piston 3 is movably mounted.

As also illustrated in FIG.
4 is connected to a guide slit 16 into which a guide hole 17 of the magazine connected to the cylinder leg 13 and the grip 6 opens. In this case, the central plane of the guide hole 17 extends through the longitudinal axis of the discharge channel 14.

Inside the magazine 18, the shaft 20 is connected to the guide hole 1.
A loose nail 19 is provided which is guided in 7 and which contacts two bearing surfaces 22 located opposite each other, the head 21 of which is inclined with respect to the longitudinal axis of the discharge channel 14. The guide hole 17 is open at the rear.

2 and 4 illustrate a forwardly pointed dividing mechanism 23, which guides the discharge passageway 14 in the locked position illustrated in FIGS. 2 and 4. It engages within the guide slit so as to separate it from the hole 17. The dividing mechanism 23 is coupled to a dividing piston 24, and the dividing piston 24
is movably supported in the split cylinder 25 and is pushed into the locking position by a compression spring 26. As shown in FIG. 2, the cylinder chamber 27 is connected to the air storage 10 by a connecting hole 28. As shown in FIG.

The divided cylinder 25 has a tapered additional portion 3 at the rear end.
It forms a sleeve which is open to the front and has an end wall 29 with a diameter of 0. There are 2 parts in the additional part 30.
There are two deep grooves 31, 32 and a shallow groove 33 at right angles to the grooves 31, 32 (see also FIG. 3).

Guide rod 34 connected to split piston 24
is guided in the hole 35 of the tapered extension 30 and is provided with a guide pin 36 at its end. The guide pin 36 engages in the groove 31 in the position shown in FIGS. 2 and 4.

The end of the dividing mechanism has a wedge-shaped slope so that a dividing tip 37 is formed, and the dividing tip 3
7 is arranged offset with respect to the vertical axis of the dividing mechanism 23.

That is, the splitting point 37 has a predetermined spacing with respect to the center of the discharge passage 14 such that the splitting mechanism 180 as shown in FIG. If it is rotated by .degree., the distance is reduced.

As shown in FIG.
When locked in, the splitting mechanism 23 remains in the released position during the entire nailing process. This makes it possible to use fastening element strips 38 in which fastening elements 39 are connected to one another by means of plastic belts 40.

In order to operate the driving machine according to the invention, first of all a feed machine (not shown) is used, in which the nails are sorted and suspended in the head and prepared for delivery.
The open rear end of the guide hole 17 of the magazine 18 is connected to the magazine 18. Nails, screw nails, which naturally have a rifled shaft instead of a smooth shaft nail,
A screw or similar can be driven in. After removing the driving machine from the feeding machine, the nail 19 is suspended in the head and slid under the influence of gravity in the guide hole 17 to the dividing mechanism 23 and then to a spring-loaded magazine slider (not shown). In the direction of the discharge passage under the action of the nail splitting mechanism 23
is pushed until it touches the

A driving machine is connected to a workpiece 41 (first
(see figure), the trigger lever 8
After actuation, the percussion stroke of the percussion piston 3 is started in a known manner. The striking piston 3 is the fourth
Reach the working position as shown in the figure, but do not drive the nail. This is because the nail is not yet located within the discharge passage 14. However, in this position of the percussion piston 3, the pressurized air also flows through the bore 11 in the cylinder 2 into the air reservoir 1.
0 and furthermore through the hole 28 into the dividing cylinder 25, in which case the pressurized air moves the dividing piston 24 together with the dividing mechanism 23 against the action of the compression spring 26 outwards into the position shown in dashed lines. slide it. The dividing mechanism now opens the guide slit 16 in which the nails are already present and removes the first nail 42 of said nails.
is pushed in the direction of the discharge passage 14 until the head of the nail 42 contacts the driving rod 15.

When the trigger lever is released, the cylinder chamber of the cylinder 2 is disconnected from the source of compressed air and at the same time compressed air is discharged from the cylinder chamber in a known manner. As a result, the pressurized air stored in the air reservoir sends the percussion piston 3 into a rearward resting position in which the percussion piston 3 is secured by the locking device 4 . In the case of the return stroke movement, the driving rod 15
on the basis of frictional forces and supported by transverse grooves in the driving rod to pivot the nail shaft 20 in a clockwise direction until the nail 42 is brought into contact with the discharge channel wall opposite the guide slit 16. , acts on the head of the first nail 42. At the discharge channel wall the nail 42 is held in place by a permanent magnet. Now, as already described, when the next blow is started, the driving rod 15 drives the nail 42 into the workpiece 41. The pressurized air from the air reservoir 10 again slides the dividing mechanism 23 so that the next nail is pressed against the driving rod 15 occupying the driving position. After the return stroke of the driving rod, the next nail reaches the discharge channel again and the driving machine is ready for the next blow.

In order for the dividing mechanism 23 according to the invention to function satisfactorily, after driving the first nail 42, while the driving rod 15 still occupies the driving position, said dividing mechanism 23 must The engagement between the shafts 20 of the nails 19 is important. This means that after releasing the trigger lever 8, the dividing mechanism 23 must reach the locking position before the driving rod 15 can be returned to its rest position. This means that the compression spring 2
6 and, in the release position of the dividing piston 24 , a section 43 tapering towards the dividing mechanism 23 , which projects from the seal 44 and throttles the pressurized air from the cylinder chamber 27 .
, so that after releasing the trigger lever 8 the split piston 24 is returned to the locking position without delay.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, in which FIG. 1 shows a partially sectioned driving machine according to the invention, FIG. 2 is a sectional view along the line of FIG. 1, and FIG. The figure is a view seen in the direction of Figure 2, Figure 4 is a sectional view taken along the line of Figure 2, and Figure 5 is a view showing the splitting mechanism rotated by 180° compared to Figure 4.
Fig. 6 is a sectional view taken along the line, Fig. 6 shows the dividing mechanism rotated by 90° compared to Fig. 4, Fig. 2 -
It is a sectional view along a line. DESCRIPTION OF SYMBOLS 1... Casing, 2... Cylinder, 3... Strike piston, 4... Locking device, 5... Connection hose, 6... Grip, 7... Release valve, 8...
Trigger lever, 9... tube slider, 10... air storage section, 11, 12, 35... hole, 13... cylinder leg, 14... discharge passage, 15... driving rod, 16... guide slit , 17... Guide hole, 1
8... Magazine, 19, 42... Nail, 20... Shaft, 21... Head, 22... Support surface, 23
...Divided mechanism, 24...Divided piston, 25...
Divided cylinder, 26... compression spring, 27... cylinder chamber, 28... connection hole, 29... end wall, 30...
...Additional part, 31, 32, 33...Groove, 34...Guide rod, 36...Guide pin, 37...Divided tip, 38...Fixing member strip, 39...Fixing member, 40...Plastic belt, 41...workpiece, 43...classification, 44...sticker.

Claims (1)

[Scope of Claims] 1. A driving machine for fixed members equipped with a shaft, comprising: a discharge passage for movably guiding a power-driven driving rod between a stationary position and a driving position; and a magazine opening into the discharge passage. , a splitting mechanism that engages between the shafts in the locking position and releases the shaft in the release position, and a holding device disposed in the discharge passage, wherein the splitting mechanism 23 has a splitting tip. 37, with a dividing mechanism characterized in that the distance between the dividing tip 37 and the discharge channel 14 is variable. 2. A patent in which the dividing mechanism 23 is rotatably supported within the casing 1 about the vertical axis of the dividing mechanism 23, and the dividing tip 37 is arranged offset with respect to the vertical axis of the dividing mechanism 23. A driving machine according to claim 1. 3. A guide pin 36 is provided at the end of the dividing mechanism 23 opposite to the dividing tip 37, and the guide pin 36 is connected to the guide groove 31, which is connected to the casing 1.
3. A driving machine as claimed in claim 2, wherein the driving machine is replaceably and slidably mounted in 32, 33.