DE2038151C3 - Device for punching plastic drainage pipes - Google Patents

Description

The invention relates to a device for perforating drainage pipes made of plastic according to the Preamble of claim 1.

It is a device / to i.ochen of existing plastic drainage pipes known (SlI-PS 1 93 045).

Oie.se known facility contains a working device, which forms a milling device designed in the form of a disk and mounted on a shaft of an electric motor. This milling disc is set in a pendulum motion by a cam gear, in which the Washer for cutting out cfcs / u in the wall Longitudinal slit / .en to be arranged perforated pipe approximate these and then back to the starting position is returned.

However, such a known device has the disadvantage. that this arranged in the tube Slots have the shape of elongated holes, so that the pipe perforated in this way only has a low strength and has poor performance. Such an execution is also known in its structural form Complicated design.

A device for punching pipes made of plastic is also known (FR-PS I 5 78 5bb), in which one during the perforation process rotating sleeve with pins guided on cams stopped for a short period of time must be when Jas's pipe is pushed forward, so that the punch pin or the hole produced is not damaged.

However, such a known device has the disadvantage that this by the necessary wedge the implementation of the step-by-step reverberation of the ge entire device one only on uneconomical Wci se has a complicated structural design that can be produced.

It is also a device for piercing from Clay existing drainage pipes were bckanntgewor den (DS PS: iK2 (ι)!), With wek-lur the pipe kontiiui ierlich vorgi "> chob <'n will. I. > n ίο device v. ice a perforation stick, which is moved along with the pipe during the perforation. The punch pin is closed for this purpose articulated and is brought into the starting position by a spring after punching.

However, the known device has the disadvantage that the entire arrangement by the need the lateral cushioning is structurally extremely complicated.

The invention is based on the object of a device for punching holes made of plastic To create drainage pipes that should be structurally simple and uncomplicated.

The object is achieved in that the dimensions of the piercing pin in terms of its length and

its cross-section and its material is selected in this way are that by its corresponding to the entrainment path through the pipe to be punched during the punching Tensions caused by the steerability are within iles elastic range.

It is advantageous if the perforation is round the ratio of the length to the diameter of the piercing pin is between 30: 1 and 50: 1.

According to the invention, the advantageous mode of action results that the facility operates in a continuous workflow without the need for a gradual Inhaliens perforated workpieces of high strength capable of producing, the entire device being an uncomplicated one that can be produced in an economical manner and has a simple structural design.

In the drawing is an embodiment of the subject of the invention shown. It shows

F i g. I the device for punching out of plastic existing drainage pipes in axial longitudinal section,

F i g. 2 the working tool on a larger scale in longitudinal section,

F i g. 3 shows a section along the line II-II according to FIG. 1.

The device for punching existing plastic drainage pipes has a single or more than perforated pins 1 (Fig. 1) designed Work tools on. the working end of which faces the pipe 2 to be punched.

Leder Lochungssiift I is fastened in a sliding piece .3 (F i g- I '"' d 2), which runs in a radial direction Groove of the stationary on a support 5 (F i g. I) arranged housing 4 is arranged. On one cylindrical projection of the slider J, a roller 6 is mounted, which in a face jaw 8 arranged profile groove 7 engages. The centering of the front jaw 8 with the stationary housing 5 (F i g. I) takes place by means of a socket 9, through the central opening of which the pipe to be perforated is passed. In the walls of the socket 9 are the respective perforation pin 1 arranged opposite openings intended for the perforation pin 1 to pass through.

The front jaw 8 is a shaft 13 via belt pulleys II and 12 of a V-belt drive device as well as via gears 14 and 15 from an Elcktromo-

(: o tor IO driven. The gear 15 is rigidly attached to the Slirnbacke 8.

The device for moving the pipe 2 to be perforated in the longitudinal direction consists of two entrainment rollers 16, the drive device of which can be kinematically connected to the electric motor IO. Will the device in a plant for the production of development tubes used, so can be used as a device / to move the pipe to be punched in

Längrichiung the per se known driver devices of the system can be used.

The Loehungsstift I is made of spring wire in such a way that Then wipe the ratio of the length / to the diameter of the perforation pin 1 / with a round punch 30: I and 50: I lies. When punching smooth-walled pipes, the working end of the punch pin 1 designed in a cylindrical shape; When punching corrugated tubes, the working end of the Punch pin, as in F i g. 2 shown, rounded.

The mode of operation of the device for punching plastic drainage pipes is as follows: The Tube 2 to be perforated (FIG. 1) is pushed through the central opening by means of the driver rollers 16 in the longitudinal direction the socket 9 moved therethrough. The front jaw 8 is driven by the electric motor 10 via pulleys 11 and 12 of a V-belt drive device via the shaft 13 and the gears 14 and 15 are driven.

Due to the cam-like interaction of the l'rofil- »1.1t 7/1 ^ ■ tT t \ rrttt .ig» * jn di '^it; The sliding piece 3 is displaced back and forth in the radial groove of the housing 4 with a ^{1 * re!} In the process, the punching pin 1 periodically approaches the punching tube 2, punches a hole through it and is then returned to the starting position.

During the period in which, · the Lucliurius pin 1 is in contact with the longitudinally displaced pipe 2 to be punched, the Lo chungsstift I deformed as a result of the entrainment movement of the KoIi res, as a result of the selected dimensions and its material only in the Llusii / .i ity range and a value that corresponds to the path which the tube 2 mn during its entrainment contact the punching pin 1 passes through, corresponds to. Through this

ίο will be the execution of round holes in the walls of the pipe to be punched guaranteed.

When perforating corrugated drainage pipes, it is useful to use the working end of the perforation style I round off, which leads to inaccuracies in the states of the waves forming the pipe wall. C-speed error the longitudinal bracing of the pipe as well as the rotational speed error of the front jaw 8 to be balanced. Such errors to be compensated arise if the perforation, pin at the Auitref-

Vl /. .11 ..! L.

the recess / wipe two waves slides off.

The setup is extremely simple straightforward structural design and does not require any specially trained operators to operate.

For this purpose 2 sheets of Zeiclmuneen

Claims (2)

Patent claims: 1. Device for punching drainage pipes made of plastic with at least one means a drive against the wall of the pipe to be punched and back to the starting position displaceable piercing pin, the tube also moving in the axial direction during piercing and the piercing end of the piercing pin during the piercing in the direction of movement of the Pipe around the movement distance of which is taken, characterized in that, that the dimensions of the piercing pin in terms of its length and cross-section as well whose material are chosen so that the by its the entrainment path through the hole to be punched Tube during the punching corresponding deflection caused stresses within of the elastic range. 2. Device according to claim!, Characterized characterized in that the ratio of the length to the diameter of the round perforated pins Perforation pin is between 30: 1 and 50: 1.