DE4445456A1 - Marking line equipment for setting out - Google Patents

Abstract

The equipment has a reel (2) for a marking line, which is mounted in a longitudinally divided casing (1). The reel has a rotary drive, which may be operated by a hand crank (7), and which has a rotating planet wheel carrier (4) on the driven side. The carrier has at least one planet gear. The gear engages with inner gearing (12) on the casing, and with a sun gear (21) on the reel. Both the sun gear and the reel may be formed as a one piece component made from a synthetic material, and the reel may also be mounted on the spigot (43) of the drive shaft (5).

Description

The invention relates to a chalk line device, according to the note specified in the preamble of claim 1 to paint.

Devices of this type are in the patents such. B.
DE 24 45 610 C2
DE 19 47 889
DE 21 01 521
made known, the versions differ essentially in the shape of the housing and material.

A Schnurrol is rotatable in a longitudinally divided housing le stored, the betä by a laterally arranged crank is done. A special cord up to a length of approx. 30 m is placed on the String roll wound up.

The housing has a closable opening for filling Color powder. When unrolling, the cord will color with the paint powder. By striking the cord straight lines can be marked on flat surfaces.

With the appropriate design, the device can also be used as Plumb bob can be used.

The disadvantage of these devices is the long roll-up time. So you need to roll up an approximately 30 m long cord over 200 crank turns, corresponding time expenditure approx. 2 minutes.

The devices are approx. 120 mm long, 70 mm wide and 30 mm thick.

The invention relates to a generic device ( Fig. 1 + 2) in which a planetary preamplifier, preferably with the gear ratio i = 4: 1, is integrated without any significant change in the usual dimensions and without any appreciable increase in price.

This reduces the reeling time to 1/4.

Chalk line devices with laterally arranged spur gear Lege are known, but expensive.

With approximately the same overall length, the housing thickness is approximately 45 mm and becomes very unwieldy.

The gear ratio of a planetary preliminary stage is calculated derived from the following equation:

The spur gear version therefore has the same toothing dimension lower by a factor of 1.

Exemplary embodiments of the invention are shown in the drawings shown.

Show it:

Figure 1 shows the longitudinal section through the device on an enlarged scale.

Figure 2 shows the cross section on the original scale.

Fig. 3 Fig. 1 with centrifugal ribs.

Fig. 1 shows in axial section a chalk line device on an enlarged scale.

The line roller ( 2 ) is rotatably supported on a housing pin ( 11 ) in the longitudinally divided housing ( 1 ). Opposite is the sun gear ( 21 ), which meshes with the planet pinion ( 3 ). The planet pinion ( 3 ) is rotatably mounted on a pin ( 41 ) which is attached to the planet carrier ( 4 ).

The planet carrier ( 4 ) with the planet pinion ( 3 ) and the drive shaft ( 5 ) is mounted in the housing ( 1 ) and has a pin ( 43 ) via which the line roller ( 2 ) is additionally supported.

This prevents the line roller ( 2 ) from tilting. On the drive shaft ( 5 ) the crank ( 7 ) is pivotally fastened.

The internal toothing ( 12 ), which meshes with the planet pinion ( 3 ), is located in the housing ( 1 ).

A sealing washer ( 6 ) arranged in the housing ( 1 ) prevents the penetration of colored powder into the gear chamber.

In the case of the gear geometry shown here, this is Gear ratio i = 4: 1.

With one turn of the crank 4 turns of the line roller ( 2 ) are generated in the same direction.

Since after each line marking the cord for color pick-up When you roll it up again, you get a considerable amount of time saving.

It can be seen in the illustration according to Fig. 1, that the filling space for the paint powder through the transmission is hardly Untitled beeinträch.

In FIG. 2 is a longitudinal section of Fig. Shown to scale. 1

The filling opening ( 13 ) is arranged laterally in the housing ( 1 ) and is closed by a slide ( 14 ).

The planet pinion ( 3 ) meshes with the sun gear teeth ( 21 ) and the internal teeth ( 12 ).

The direction of rotation of the planet carrier ( 4 ) - line roller ( 2 ) and crank ( 7 ) is in the same direction.

Fig. 3 shows identical to Fig. 1, laterally on the cord roll ( 2 ), however, about 8 radial centrifugal ribs ( 22 ) are arranged.

Due to the lay-up, the speed of the line reel ( 2 ) is n ∼ 10 s ^-1 , which creates a small pressure difference of approx. 0.02 bar, which on the one hand relieves the sealing washer ( 6 ) and at the same time improves the coloring of the line by mixing .

Claims (5)

1. chalk line device with a longitudinally divided housing ( 1 ) in which a line roller ( 2 ) is rotatably mounted, characterized in that on the drive side a planetary gear with rotatable planet carrier ( 4 , 41 ) with at least one planet pinion ( 3 ) is arranged, that meshes with the internal teeth ( 12 ) in the housing ( 1 ) and the sun teeth ( 21 ) of the line roller. 2. chalk line device according to claim 1, characterized in that the internal toothing ( 12 ) without cutting in the housing ( 1 ) is introduced. 3. chalk line device according to claim 1 + 2, characterized in that the advantageously made of plastic material line roller ( 2 ) and the sun gear ( 21 ) are made in one piece. 4. chalk line device according to claim 1, characterized in that the line roller ( 2 ) is additionally mounted on the pin ( 43 ) of the drive shaft ( 5 ). 5. chalk line device according to claim 1-4, characterized in that on the line roller ( 2 ) on one or both sides radial centrifugal ribs ( 22 ) are arranged.