EP3864204A1

EP3864204A1 - Textile machine

Info

Publication number: EP3864204A1
Application number: EP19774075.6A
Authority: EP
Inventors: Jörg Schmitz; Thomas Schmitz
Original assignee: Truetzschler GmbH and Co KG
Current assignee: Truetzschler Group SE
Priority date: 2018-10-12
Filing date: 2019-09-19
Publication date: 2021-08-18
Also published as: CN112955590B; CN112955590A; WO2020074233A4; WO2020074233A1

Abstract

The invention relates to a textile machine (100) having an operating section (103 which is configured to receive and to hold operating elements of the textile machine (100). Furthermore, the textile machine (100) comprises a fixing section (3, 4, 6; 124; 131) and a closing section (120); the closing section (120) covers the operating element towards the outside in reference to the rest of the textile machine (100) when in a closed position and is fitted by one end to the fixing section (3, 4, 6; 124; 131) such that the closing section can be pivoted away freely about an axis of rotation from the closed position into an open position and back. The textile machine (100) additionally comprises gas pressure springs (10), which are attached by one end (11) to a stationary part (131) of the textile machine and by the other end (12) to the closing section (120). The gas pressure springs (10), viewed in the rotational plane transverse to the axis of rotation of the closing section (120), are arranged symmetrically in relation to the closing section (120) such that the gas pressure springs limit pivoting of the closing section (120), such that a centre of gravity of the closing section (120), in the opening direction, is located at least outside the opening position of the closing section (120) in front of the axis of rotation of the closing section (120) and, in the open position, is also located in front of the axis of rotation of the closing section (120) or in the direction of gravity on a line with the axis of rotation of the closing section (120).

Description

Title: Textile Machine

Description The invention relates to a textile machine which has a closing section which covers and can open operating elements.

Such textile machines are known. They are used to process fiber material. Such textile machines comprise an operating section with operating elements, for example intended to process the fiber material. Openable arches as the closing section are provided to cover the operating section to the outside, for example to minimize the risk of injury. Such closing sections are freely rotatably supported at one end and can be swung open accordingly. This is usually done in such a way that the closing section is either swung open beyond an upper dead center position, so that the closing section does not automatically push into the closing direction due to its weight. This has the disadvantage that the closing section has to be pivoted back over this top dead center position, which is energy-intensive. Or this closing section is prevented from closing by an element such as a gas pressure spring. This has the disadvantage that the closing section could twist, since it is usually made of light and inexpensive sheet material. The object of the invention is to counter the aforementioned disadvantages.

This object is solved by the subject matter of the independent claim. Advantageous further developments are given in the subclaims. According to the invention, a textile machine is provided which has an operating section. The operating section is designed to receive or hold operating elements of the textile machine which are used, for example, for processing fiber material. The textile machine further comprises a fastening section and a closing section. In a closed position, the closing section covers the operating elements with respect to the other textile machine and is attached at one end to the fastening section so as to be freely pivotable about an axis of rotation away from the closed position into an open position and back. The textile machine also includes gas pressure springs. The gas pressure springs are articulated at one end to a stationary part of the textile machine and at the other end to the closing section. The gas pressure springs are, seen in a plane of rotation transverse to the axis of rotation of the closing section, symmetrical with respect to the closing section and further arranged such that they limit pivoting of the closing section in such a way that a center of gravity of the closing section, viewed in the opening direction of the closing section , at least outside the opening position of the closing section in front of the axis of rotation of the closing section. It can be provided that the center of gravity of the closing section also lies in its opening position itself in front of the axis of rotation of the closing section. That is, the top dead center position is not reached, so that the closing section is not able to generate any further torque in the opening direction. This reduces the force to close the closing section, which can be supported by the gas pressure spring. Alternatively, it can be provided that the center of gravity in the opening position of the closing section lies in the gravitational direction on a line with the axis of rotation of the closing section, so that in this position the top dead center position is reached but not exceeded. That is, here too, the closing section cannot generate any torque in the opening direction. The symmetrical arrangement of the gas pressure springs has the advantage that a closing section formed from a sheet metal part can be opened and closed almost without torsion, from one side to which the gas pressure springs have different distances. This side usually points in a direction that runs parallel to the axis of rotation of the closing section.

The textile machine is preferably designed as a draw frame (regulated, uncontrolled, integrated, with one or more drafting devices), comber or tape winder, all of which are known to have at least one drafting device. There are numerous closing sections, for example for covering elements of a drafting system drive, such as deflection rollers and drive belts looped around them, or of drafting system rollers of an associated drafting system. The closing section is preferably designed as a drafting hood, so that the aforementioned operating elements accordingly comprise drafting rollers. This hood is very large, relatively heavy and prone to twisting. This improves the handling of such a textile machine.

In each of the aforementioned textile machines, the fastening section preferably has at least one sheet metal element. This leads to a relatively low overall weight. In each of the aforementioned textile machines, at least one of the gas pressure springs in the open position of the closing section can be aligned with its line of action, viewed from one end to the other end, at a right or acute angle to the direction of gravity. The effect of this is that a large Greater force is required than is caused by the center of gravity of the closing section itself. Alternatively or additionally, at least one gas pressure spring is articulated with its other end in such a way that the associated articulation point on the closing section, as seen in the opening direction of the closing section, is behind the axis of rotation of the closing section. This leads to the fact that the closing section generates a closing torque, but this is partially converted into a torque on this gas pressure spring in the closing direction and thus against the action of the gas pressure spring. This reduces the actual force against the action of this gas pressure spring. This means that smaller and consequently cheaper gas pressure springs can be used. Again, additionally or alternatively, the force effect of the closing section, due to the position of its center of gravity in its plane of rotation in the closing direction of the closing section, corresponds to the line of action of the at least one gas pressure spring. A better support effect of the closing movement of the closing section can thereby be achieved.

In each of the aforementioned textile machines, the articulation point of the other end of at least one gas pressure spring in the opening and / or closing position of the closing section, viewed in the direction of gravity, can be arranged in front of the axis of rotation of the closing section. If the floor on which the textile machine is installed is horizontal, ie perpendicular to the gravitational effect, the articulation point of the other end of the gas pressure spring is at a greater distance from the floor than the axis of rotation or the articulation point of the closing section on the fastening section. This also causes the aforementioned generation of a torque in the gas pressure spring, combined with the advantages already stated.

At least one gas pressure spring can be arranged in each of the aforementioned textile machines, in the closed position of the closing section or to have a pressing effect in the opening position of the closing section. In the first case, the gas pressure spring assists in opening the closing section, in the second case in closing. Further features and advantages of the invention result from the following description of preferred embodiments. Show it:

1 shows a drafting arrangement, FIG. 2 shows a detailed view of the drafting system hood with two frame walls according to an embodiment of the invention in the closed position,

Figure 3 is a detailed view analogous to Figure 2 with the rear in Figure 2

Frame wall,

FIG. 4 shows a detailed view of the drafting hood with two frame walls according to the embodiment of the invention with the drafting hood open and

FIG. 5 shows a partial exploded view according to FIG. 3, likewise with the drafting hood open, in section.

1 shows an arrangement 1 with a gate 2 and a downstream section 100 in a conventional arrangement.

The gate 2 is constructed in a known manner and will not be described further. The line 100 has, inter alia, a can depositing device 110 on the output side. In the example shown, the can depositing device 110 comprises a can rail 111 for the full cans and a preferably driven can track 112 which moves empty cans into the actual can changer. In a known manner, the can changer has, for example, a can slide 113. Above the can 5 shown here is a can cover plate (not designated) in which the turntable of the can depositing device 110 is accommodated in a freely rotatable manner. The can cover plate is attached to the other line 100 and is supported at the right end by means of a support (also not shown) on a floor (not shown), preferably adjustable in height.

An operating platform 102 is located to the side of the line 100. An operating terminal 101 is located here at one end of the operating platform 102. Furthermore, a drafting hood 120 can be seen, which covers a stretching section 103 in a known manner. On the long sides of the drafting hood 120 there are two hinged hoods 104, 104 which cover, for example, drive elements such as belts. Below the front cover 104 here is a door 105, behind which, for example, the control electronics of the line 100 are accommodated.

FIG. 2 shows the route 100 within the framework of the drafting hood 120 and a frame 130.

In the example shown, the drafting hood 120 is attached to the frame 130 as a base, which essentially has two sheet metal parts 131 with intermediate elements arranged between them, not shown here. In the example shown, the drafting system hood 120 has a handle 121 on the front long side and a lighting section 122 on an upper side, which serves, for example, to display operating states.

FIG. 3 shows the line 100 in a view analogous to FIG. 2, only without a front sheet metal part 131. This shows how the drafting hood 120 is articulated. Each sheet metal part 131 preferably has a bearing element 4 at the rear end here, which is fastened to the associated sheet metal part 131 by means of, for example, three screws 3. The two bearing elements 4 as a whole define the axis of rotation of the drafting hood 120. A gas pressure spring 10, which is at the rear here, is pivotally articulated at one end 11 at a pivot point 132 of the associated sheet metal part 131 and at the other end 12 at a pivot point 123 of the drafting hood 120 attached or articulated. The articulation point of the end 12 lies in the closed position of the drafting hood 120 shown in FIG. 3, seen in the opening direction of the drafting hood 120 and in the direction of gravity, in front of the axis of rotation of the drafting hood 120.

FIG. 4 shows the route 100 in a view analogous to FIG. 2 in a state in which the drafting hood 120 is open, that is to say in the (maximum) opening position. Since the gas pressure springs 10 are fully extended in the open position of the drafting hood 120, the drafting hood 120 cannot be swung open any further. Furthermore, the almost horizontal alignment of the gas pressure springs 10 (ie perpendicular to the direction of gravity) means that the drafting system hood 120 with its center of gravity can still be on the left side of the bearing elements 4, but the force of the gas pressure springs 10, 10 is sufficient to prevent the drafting hood 120 from closing.

The drafting hood 120 preferably has sheet metal parts 124 which are articulated on the respective sheet metal part 131. The drafting system hood 120 can thus be considerably wider than the distance between the mutually facing outer sides of the sheet metal parts 131, 131 from one another. The drafting hood 120 can thus also cover elements, such as drive rollers, attached to the outside of the sheet metal parts 131, 131.

The articulation points 123 on the drafting system hood 120 are located, seen in the opening direction of the drafting system hood 120 along their rotation plane, behind the articulation point on the sheet metal part 131 (not shown) or behind the axis of rotation of the drafting system hood 120.

FIG. 5 shows an illustration similar to FIG. 4 in section along a line A - A with respect to the sheet metal part 131 in FIG. 4, specifically in the context of the rear articulation of the drafting hood 120, which is shown schematically here only by means of the sheet metal part 124 arranged there is.

Since the gas pressure spring 10, as stated above, hardly rotates in the area of the associated articulation point 132, it can be provided that a projection 13 formed at the lower end 11 of the gas pressure spring 10 is inserted frictionally into the articulation point 132 of the sheet metal part 131 formed by means of a through opening. Since the drafting hood 120 rotates much more strongly with respect to the gas pressure springs 10 when pivoted at the articulation point 123 (formed by means of a through opening), a bearing element 6 is provided between a projection 14 provided at the other end 12 of the gas pressure spring 10 and the articulation point 123 . The projection 14 is preferably inserted non-rotatably into an associated through-opening or recess 6a of the bearing element 6, preferably in a non-positive and / or positive manner. The bearing element 6 has on its side facing away from the gas pressure spring 10 a projection 6b, which is preferably inserted non-positively and / or positively into the associated articulation point 123 of the sheet metal part 124. The projection 6b is designed to be freely rotatable with respect to the recess 6a.

The bearing element 4 has a protruding bearing section 4b on the side facing the outside of the associated sheet metal part 131. The bearing section 4b designed here in a protruding manner is inserted through a through opening 134 formed in the sheet metal part 131 into a receiving section 125 formed in the drafting hood 120 or in the associated sheet metal part 124, in a freely rotatable or non-rotatable manner. In the case of the non-rotatable arrangement, the bearing element 4 with its bearing section 4b is freely rotatable with respect to the associated sheet metal part 131. The projection 4b is preferably inserted non-positively and / or positively into the associated receiving section 125. In the example shown, the projection 4b is molded onto the other bearing element 4. Because of this, the receiving section 125 has an inner bearing, in which the bearing element 4 is inserted in a freely rotatable manner by means of the projection 4b. The bearing element 4 preferably has three through openings 4 a on its right side, which are aligned with associated fastening openings 133 of the sheet metal part 131. A screw 3 is screwed into each of the fastening openings 133 through the through openings 4a. The bearing element 4 is thus securely fixed to the sheet metal part 131. To avoid fiber fly, the projection 4b further comprises a sealing ring 4c.

The invention is not limited to the embodiment described above.

Instead of the bearing element 4, the respective sheet metal part 131 itself can have a molded projection on which the sheet metal part 124 is placed. The bearing element 4 can be designed such that the projection 4b is freely rotatable with respect to the other bearing element 4. As a result, the bottom bracket in the receiving section 125 can be omitted.

Instead of the bearing element 4 or 6, a sliding bearing can also be provided between the projection 13 or 14 and the articulation point 132 or 123.

A bearing can also be provided between the projection 13 and the articulation point 132.

Instead of the sheet metal parts 124, the articulation of the gas pressure springs 10, 10 can be articulated on any suitable section of the drafting hood 120. In particular, the sheet metal parts 124 could be omitted. The alignment of the gas pressure springs 10, 10 can also be such, individually or together, that at least one gas pressure spring 10 in the illustration according to FIG. 4 points obliquely upwards, that is, includes an acute angle, for example, of 80 ° with the direction of gravity. The articulation point 123 on the drafting hood 120 can also be located above or in front of the axis of rotation of the drafting hood 120, as seen in the opening direction of the drafting hood 120 along its rotation plane. In this case, the associated gas pressure spring 10 would have to be made stronger, for example.

Preferably, a force generated in the opening position due to the center of gravity of the drafting hood 120 lies in the closing direction along the line of action (that is, along the current longitudinal extent) of at least one of the gas pressure springs 10. As a result, the entire “closing force” can be n 10 can be accommodated without stresses occurring in particular at the articulation point (s) 132.

The projection 14 of at least one gas pressure spring 10 is preferably in the opening and / or closing position of the drafting hood 120 according to FIG. 3 above the axis of rotation. Seen in the direction of gravity, the respective projection 14 is thus in front of the axis of rotation of the drafting hood 120.

The direction of action of at least one gas pressure spring 10 can also be reversed. That is, it has a pressing effect in the closing direction.

Although the opening has been described with respect to the hood 120 of a drafting system, it is clear that the invention can be applied to any cover which is pivotably articulated. This applies in particular to drafting hoods on a machine such as a belt winder, a comber or an integrated draw frame.

However, the invention can also be applied to flaps and doors as they occur in any type of text machine. In the case of the Door 105 shown in FIG. 1 could include operating elements control and / or filter elements. Other flies, such as the covers 104 according to FIG. 1, can also be equipped with such a swivel mechanism.

As a result, the invention offers a simple and secure possibility of pivotally attaching a closing section such that in the open state it lies with its center of gravity in the direction of the closing movement in front of or above the articulation point of the closing section.

Reference list

1 stretching arrangement

2 gates

3 screw

4 bearing element

4a through opening 4b projection

4c seal

5 jug

6 bearing element

6a recess

6b lead

10 gas pressure spring

1 1 12 end

13, 14 lead

100 route

101 operator terminal

102 platform

103 stretch section

104 cover

105 door

1 10 can deposit device

1 1 1 can rail

1 12 can career

113 can pusher 120 drafting hood

121 handle

122 light section

123 articulation point

124 sheet metal part

125 receiving section

130 frame

131 sheet metal part

132 articulation point

133 mounting hole

134 through opening

A - A line

Claims

1. textile machine (100) having

An operating section (103) designed to hold or hold operating elements of the textile machine (100),

A fastening section (3, 4, 6; 124; 131),

• a closing section (120), the

- In a closed position, covers the operating elements with respect to the other textile machine (100) and - With one end on the fastening section (3, 4, 6; 124; 131) about an axis of rotation away from the closed position into an open position. position and back is freely pivotable,

• Gas pressure springs (10), the

- are hinged at one end (11) to a stationary part (131) of the textile machine (100),

are articulated with the other end (12) on the closing section (120),

- Seen in a plane of rotation transverse to the axis of rotation of the closing section (120), are arranged symmetrically with respect to the closing section (120) and

- are also arranged in such a way that they limit pivoting of the closing section (120) in such a way that a center of gravity of the closing section (120) is seen in the opening direction of the closing section (120),

· At least outside the opening position of the closing section (120) in front of the axis of rotation of the closing section (120) and

in the opening position of the closing section (120)

° also in front of the axis of rotation of the locking

Section (120) lies or _° in the direction of gravity with the axis of rotation of the closing section (120) is in line.

2. Textile machine (100) according to claim 1, designed as

Distance (100),

• tape winder or

• comber.

Textile machine (100) according to claim 2, wherein

• The closing section (120) is designed as a drafting hood (120) and

• The operating elements include drafting rollers.

Textile machine (100) according to one of the preceding claims, wherein the fastening section (3, 4, 6; 124; 131) has at least one sheet metal element (124).

Textile machine (100) according to one of the preceding claims, wherein at least one of the gas pressure springs (10) in the opening position of the closing section (120)

Is oriented with its line of action, from one end (11) to the other end (12), at a right or acute angle to the direction of gravity,

• The other end (12) is articulated in such a way that the associated articulation point (123), viewed in the opening direction of the closing section (120), is behind the axis of rotation of the closing section (120), and / or

• is articulated in such a way that a force effect of the closing section (120) due to the position of its center of gravity in the plane of rotation in the closing direction of the closing section (120) with the Line of action of the at least one gas pressure spring (10) corresponds.

6. textile machine (100) according to any one of the preceding claims, wherein the articulation point (123) of the other end (12) at least one

Gas pressure spring (10) in the opening and / or closing position of the closing section (120), seen in the direction of gravity, is arranged in front of the axis of rotation of the closing section (120). 7. Textile machine (100) according to one of the preceding claims, wherein at least one gas pressure spring (10) is arranged to have a pressing effect in the closed position of the closing section (120) or in the open position of the closing section (120).