DE262039C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- Ju. 262039 CLASS 71c. GROUP

and other machines.

Patented in the German Empire on April 27, 1912.

The present invention relates to a machine for trimming the heels of Boots or shoes in which the knife when reaching a certain point is automatically prevented from further forward movement. They are already machines known of this type, in which a stop moving with the knife at his Impact on the sole, that is, when the heel is trimmed, by means of further devices the knife is decoupled from the drive mechanism. For example, a machine is known in which the The knife is decoupled from the drive shaft in the following way. The one operating the knife Rod consists of two parts, one of which engages in a curve guide, the is assigned to the stop touching the sole. Is the paragraph trimmed and accordingly, if the stop touches the sole, the part of the rod engaging in the curved guide moves in the latter upwards that the drive rod has its stroke corresponding to the deflection of the driving rod Eccentric ο. Like. Can complete without moving the knife further. This method however, it is imprecise in practice and also requires the upward movement to begin of the limb in the curve slit a considerable force, which increases all the more, the further the wear that occurs after a while on the slot and the guide pins progresses. With the Increasing demands on the machine naturally also increase the wear and tear on it Divide faster and faster until finally the connecting rod kinks down and the further operation of the machine becomes impossible. The pressure exerted on the shoe is also very considerable and in the case just considered would grow so much that the shoe would be cut through.

The machine according to the invention has the advantage that it is extremely efficient in its operation reliable and of a very simple design. Essential for this are the means through which, when the stop hits the shoe, the instantaneous Decoupling of the knife from the drive mechanism is brought about.

According to the invention and as applied to a heel trimming machine in which the automatic decoupling of the knife from the drive mechanism at the moment must be effected, in which the knife reaches the height of the sole, becomes a

Stop provided which is in connection with a rack. This rack when the stop hits the sole, a toothed segment rotates, which by means of a second tooth segment and a further rack a horizontal rod confirmed, the movement of which disengages the levers that hold the knife with the drive mechanism associate. The application of such a

ίο The arrangement is except for heel trimming machines also advantageous in other work machines in which the tool is at a certain given point on the workpiece is to be switched off, and the invention is accordingly not applicable to heel trimming machines limited.

In the drawing is the new device, in one embodiment in a machine shown for trimming paragraphs.

Fig. Ι is a front view - where the

front cover plate is thought to be removed - the head part of a heel trimming machine, Fig. 2 is a side view, namely the

left side of Fig. 1, ·

3 is a vertical section along line 3-3 of FIGS. 2 and 4,

FIG. 4 is a vertical section along line 4-4 of FIG. 3.

α is the upper part or head of the frame of a machine for trimming the paragraphs in which the subject of the invention is to be used, b is the plate used to hold the paragraph and c (shown in dashed lines in Fig. ι and 2) is the paragraph to be trimmed Boot, which is shown below the knife d used for trimming in the working position.

Inside the head of the frame α a slide e movable in the vertical direction is provided. Axes f are rotatably mounted in tabs β ¹ , e ^{2 thereof.} A lever arm f ¹ , f ^{2 is} wedged onto each of these and, together with the axes f, form a swinging angle lever. The free end of the lever arms f ¹ has a shoulder, and these shoulders occur when the parts of the • in Fig occupy the position shown. 3, g with corresponding shoulders, g ¹ of a knife carrier g ² engages the inside of the carriage e in is guided movable in the vertical direction. The knife is attached to the lower end of the knife carrier g ² with the help of two wedges d ¹ , d ² , one of which d ¹ engages in the lower part of the knife carrier, while the other wedge d ^{2 with} the lower end screwed into it Threaded rod d ³ carries, which receives a nut d * on its upper part. Tightening this nut causes the knife d to be firmly wedged in the knife carrier g ² by lifting the wedge d ² along the wedge surface of the wedge d ¹ , as can be easily seen from FIG.

On the rod b ¹ , which carries the plate b depressing the shoulder and is guided in a guide of the carriage or knife carrier g ² , a toothed rack b ^{2 is} cut into which a gear h engages. This is on the other hand in engagement with another gear h ¹ , which in turn teeth with a rack k ^2. This rack is provided in the upper part of a rod h ³ , which is connected at the lower end by means of an elastic arrangement with a foot lever (not shown in the drawing). An angle lever i, i ¹ is loosely arranged on the axis h ^{l of} the gear wheel h. The axis A ⁴ and that of the gear h ¹ are mounted in the frame α. The upper arm i of said angle lever is constantly pressed to the right by a compression spring i ² (Fig. 4), while a pawl i ^{l is} articulated on the free end of the lower arm i ¹ in i ³ , which is connected to the teeth of a ratchet wheel i ⁵ can come into engagement, which is keyed ^{on the axis ä 4 of} the gear h. A spring i ⁶ keeps the pawl ⁴ in engagement with the ratchet wheel i ⁵ . However, this pawl comes out of engagement with this ratchet wheel in the rest position of the machine (Fig. 4), as a result of the contact of a roller i ¹ , which is arranged at the end of the ^{arm carrying the pawl i 4} , with a fixed stop i ⁸ , which is stuck on the frame α and has two ramp surfaces i ⁹ and i ¹⁰ , of which the former is arranged ^{concentrically to the axis A 4.} The angled lever i, i ^{1 also} has a.die i ¹¹ which, by the action of the spring i ^2, rests against a stop e ^{3 of} the slide e .

On the back of the carriage e a rack e ^{l is} provided, in which a gear e ⁶ engages, which itself is ^{in engagement with a gear £ 6} , which in turn teeth with a rack e ^7. This is arranged on a rod e ^s which is moved up and down by an eccentric (not shown in the drawing) that is set in motion by the drive of the machine. The axes of the gears e ⁵ and e ⁶ are carried by the frame α .

In the slide β can slide in the vertical direction another slide j , which carries an adjustable stop j ¹ at its lower end and is pressed down by a spring k , which is supported with its upper end against a tab e ⁹ , which is at the top Part of a plate is provided. the one firmly connected to the slide e

Cover e ¹⁰ forms. The lower end of the spring, on the other hand, acts on a tab y ^{2 of} the slide j in order to usually press it against the stop e ^{11 of} the cover e ^10.

At the free ends of the arms f ^{2 of} the angle levers f, f ¹ , f ² , sliding blocks I are articulated, which slide in inclined or appropriately curved scenes m , which are in a horizontally lying rod m ¹

ίο are provided. A toothed rack m ^{2 is} cut into the underside of this rod, with which a toothed sector η Tn is engaged, which is loosely arranged on an axis n ¹ which is carried by the cover e ¹⁰ . A toothed sector n ² is also loosely arranged on the axis n ¹ and engages in a toothed rack y ^s provided on the slide j. The toothed sector n ² has an arm n ^s , the end of which is in engagement with the end of the lever 0 of an angle lever 0, o ¹ , which is rotatably arranged at the point o ² on the sector η . This engagement is achieved by a spring ο ³ , one of the ends of which acts on the arm 0 and the other on the sector η. The spring o ³ usually presses the arm ^{o 1} against a stop o ⁴ which is arranged on the sector η (cf. FIG. 3). The sector n ² carries a stop << ⁴ , which is intended to act on the left side surface of the sector η (FIG. 3) in order to return it, as will be seen further below. On the cover e ¹⁰ firmly connected to the slide e, a stop o ^{5 is} provided, the purpose of which will be seen below.

The mode of action is as follows:
If, for the purpose of using the machine, the foot lever (not shown in the drawing) connected to the rod h ^{3 is} acted on, the toothed rack h ² causes the gear h ^{1 to} rotate in the direction of the arrow as it moves downwards. This transmits the movement through the gear h to the rack b ² , whereby the rod b ¹ moves downwards - and the plate b is pressed down on the shoulder c in order to hold it. The further depression of the foot lever, which is possible due to the elastic connection between this and the rod h ³ , causes the coupling of the eccentric shaft, not shown in the drawing, for the drive after the plate b has come into contact with the shoulder c of the shoe the rod e ⁸ , as has already been mentioned above. The so set in motion eccentric shaft causes a downward movement of the rod e ^s , so that its rack e ⁷ causes a rotation of the gear e ⁶ 'in the direction of the arrow, which then ^{acts through the intermediary of the gear e 5} on the rack e ⁴ to a To cause downward movement of the carriage β.

As soon as the downward movement of the carriage e has been initiated, the stop e ³ enables, with the simultaneous downward movement, a downward movement of the thumb i ¹¹ under the action of the spring i ² acting on the arm i of the angle lever i, i ¹ . This angle lever then rotates about the axis k * in the direction of the arrow w in Fig. 4 and takes the pawl j ⁴ with it. During this movement, the roller rolls i ¹ along the concentric part of the ramp surface i ⁹ up to the time point at which enters the roller for on the tread i ^'10 and allows spring i ^6, the pawl i ⁴ with the ratchet i ⁵ in To bring intervention. From this point on, the rod b ¹ can no longer move upwards, and the plate b is held in the depressed position and holds the paragraph c.

Through the mediation of the lever arms f ¹ , the free ends (Fig. 3) of which are ^{in contact with the shoulders g, g 1 of} the knife carrier g ⁸ , the carriage e takes the knife carrier with it during its downward movement, so that the knife d during its downward movement Front edge of paragraph c trimmed.

As soon as the stop j ¹ comes into contact with the surface of the sole of the shoe during the downward movement of the carriage e and the knife d , this stop can no longer move downwards, so that the further downward movement of the carriage e the Spring k between the tab j ^{3 of} the carriage y and the tab e ^{9 of} the cover e ^{10 is} compressed. At the same time, the sector turns n ² when rolling on the currently detected rack j ³ on its axis n ^l in the direction of the arrow χ in Fig. 3. In this movement causes the end of the arm n ³ by it from right to left on the The end of the arm 0 of the angle lever 0, o ¹ presses (Fig. 3), a rotation of the sector η about its axis η ¹ in the direction of the arrow y, which has the consequence that the rod m ^{x is moved} from right to left ( Fig. 3). In this movement, cause the curved scenes m by acting on the sliding blocks I of the arms f ² , a swing of the arms f ¹ in the direction of the arrows z, z ¹ in Fig. 3, so that the free ends of these arms are from the Free shoulders g, g ¹ of knife carrier g ² and do not take it with you any more.

The curved scenes m make it possible to obtain a small angle of attack for the sliding blocks / at the beginning, and ensure a quick disengagement due to the increasing enlargement of this angle. You can use 12g

in this way, without changing the dimensions of the lever arms f ² , lift the levers f ¹ at the points f ^s by a distance which is greater than the simultaneous downward movement of the carriage e. This is how you get a. quick release.

As soon as the disengagement has taken place, the knife is immediately stopped, whereby the sledge is required to have all of its

ίο continues downward movement alone and causes a stronger compression of the spring k , until the end of the stroke of the eccentric ^{8 driving the rod.}

The eccentric then causes the rod e ^s to move upwards, which moves the slide e upwards through the intermediary of the gears e ⁶ , e ⁵ and the rack e ^l. During the upward movement, this causes the knife carrier g ^{2 to} rise again with the aid of a catch e ¹² , which is provided on its lower part . During the upward movement of the slide e , the spring k presses the slide / and the stop j ¹ arranged on it upwards as it relaxes in order to bring these parts back into the rest position shown in the drawing. At the same time, the sector n ² rotates by rolling on the rack j ^z opposite to the arrow direction χ (Fig. 3) and acts through its stop m ⁴ on the sector η to rotate it opposite to the arrow direction y. As a result, the rod m ^{1 is moved back} from left to right (Fig. 3), and the curved scenes m of this rod lead through their action on the sliding blocks I, the arms f ^l in the position shown in Fig. 3, where they with the shoulders g .-g ^{1 of} the knife carrier g ^{2 are} in engagement.

As soon as the carriage e and the knife carrier are in their highest position shown in the drawing in the uppermost position of the eccentric, the eccentric used to drive the rod e ^{8 is} decoupled from the motor shaft of the machine with the aid of a known device, and the parts are stopped in the position shown in the drawing.

During the upward movement of the carriage e , the stop e ³ rotates the angle lever i, i ¹ about its axis h ^l opposite to the direction of the arrow w in FIG. 4, while at the same time tensioning the spring i ² , in that it rests against the thumb i ¹¹ . As a result, the roller i ^{1 is returned} from the ramp surface i ¹⁰ to the ^{ramp surface i 9 of} the stop i ⁸ and the pawl i ^{A is} disengaged from the ratchet wheel i ⁵ , so that the plate b holding the shoulder is released. As soon as you release the foot lever (not shown in the drawing) to drive the rod h ^a , this rod goes back under the action of the spring and, through the intermediary of the gears h ¹ , h and the rack b ^2, lifts the plate b into the rest position shown in the drawing, so that the footwear, the heel of which has just been trimmed, can be removed and replaced with a new one in order to start the work described above again.

If, during the movement of the sector η in the direction of the PMIeS y, the arm o ^{1 of} the angle lever 0, o ¹ encounters the stop o ⁵ , this results in a rotation of this angle lever counterclockwise around the shaft o ² , whereby the arm 0 of this angle lever from the arm n ^{s of} the sector n ^{2 is} free. As a result, the latter can move on on its own without taking the sector η with it. This prevents the movement imparted to sector n ² by the rack j ^{z from} transmitting a much greater movement to the rod ^ ¹ and consequently to the arms f ¹ than would be required to disengage said arms from the shoulders g, g ^{1 of} the knife carrier g is required.

It is easy to understand that according to the preceding description it is easy to use the adjustable stop j ^{1 to determine} exactly the point in time at which the knife should be stopped in its downward movement, regardless of the thickness of the sole of the shoe .

It is understood that the invention does not apply to those described and illustrated Limited versions; because you could change the structural details without to deviate from the inventive idea, according to the requirements made in practice orders.

The invention can of course also be used in other machines, wherever are tools that work in a similar way. ·

Claims (4)

Patent-to sayings: i. Furnishings . for stopping the diameter of paragraph · * Beschneidmaschinen and other machines, characterized in that the knife (A), the downward movement is imparted by a carriage (e) defined by the drive motor of the machine is driven (e ^8, e ^e, e ⁵⁾ and the knife carrier (g ² ) is moved with the help of coupling levers (f ¹ ) , which, as soon as the knife (A) is at the level of the sole, comes into contact with an adjustable stop (j ¹ J with the sole or the like. be disengaged by the called stop (j ¹ ) acts by means of racks (j ^z , m ² ) and tooth sectors (j » ² , n) on a rod (m}) which controls the disengagement movement of the clutch lever (f ¹ ) . 2. Device according to claim i, characterized in that the adjustable stop (J ₁ ) with respect to the carriage (e) of the action of a spring (k) is movable against and carries a rack (j ^s ) which, as soon as the stop is inhibited in its downward movement by the contact with the shoe sole or the like, rotates a tooth sector (n ² ) which sits on an axis (n ¹ ) arranged on the carriage (e) and in turn engages with another tooth sector (n) that goes into the rack (m ^% ). which engages the clutch lever (f ¹ ) controlling rod (m ¹ ). 3. Device according to claim 1 and 2, characterized in that the movement of the release rod (m ¹ ) on the clutch lever (f ¹ ) takes place with the help of scenes (m) which act on sliding blocks (I) which are connected to the clutch levers connected arms (f ² ) are provided. 4. Device according to claim 1 to 3, characterized in that the movement of the sector (n ² ) driven by a movable stop (j ¹ ) with the aid of a coupling device (ο, ο ¹ , ο ² , ό ³ , ο *) the sector (η) for driving the release rod (m ¹ ) is transmitted, and that the two sectors are decoupled from each other by means of a stop (o ^B ) as soon as the carriage (e) moves further downwards after the knife carrier has been disengaged. For this purpose 2 sheets of drawings.