ES2956740B2 - Object transport device - Google Patents

Description

DESCRIPTION

Object transport device

Technical sector.

The present invention relates to an object transport device, in particular suitable for the transport of spinning cans, comprising: at least one transport track provided with fixed plates for the static support of the objects to be moved and plates mobile that move longitudinally alternatively and at different heights in: an operative forward direction in which the objects to be transported are moved by said moving plates and an inoperative backward direction in which said moving plates are located below a plane of the fixed plates and the objects to be transported remain supported on said fixed plates.

State of the prior art.

In the textile industry, the card slivers are transported in spinning boats that are moved by a transport device from or to the roving frames or spinning machines.

Document EP 0423519 describes a transport device for the advancement of spinning cans that comprises a surface for supporting the base of the cans, said transport track longitudinally having a longitudinal slot through which some towing hooks protrude. interspaced and acting laterally against a ring or lower end of the spinning cans causing their movement along the transport device.

This transportation route has various drawbacks that are listed below.

The spinning boats remain permanently in contact with the fixed surface of the transport track, which causes, due to friction, wear to the bottom of the spinning boat, which also suffers lateral deformations due to the knocking of the drag hooks against it. the spinning boat.

Currently there is a tendency to manufacture spinning machines of great length, and the friction force produced during the advance of the cans on the transport track significantly increases the energy consumption necessary to simultaneously move an indeterminate number of spinning cans that, full of product, they can reach a weight between 30 and 80 kilos each.

An additional problem with this transport route is that the tow hooks protrude from the support surface of the boats through the slot defined in said transport route, which on the one hand poses a risk of injury to workers and On the other hand, the access of dirt through said slot towards an inaccessible area, through which the hook driving means circulate.

Document EP 0612871 describes a transport device for this type of spinning cans that solves part of the problems mentioned above.

In this document, the transport device comprises a transport track composed of support blocks with at least two slots in the shape of a primitive circle, which are arranged in parallel and extend in the longitudinal direction of the transport track, being arranged in said slots have cylindrical drag bars provided along their entire length with flattenings.

Said drag bars extend in the longitudinal direction of the transport track and describe a reciprocating or reciprocating movement by means of a drive and can be rotated for the transport of the objects to such an extent that said drag bars enter, with their round side surfaces, in contact with the underside or base of the objects to be transported.

In this transport device there is no continuous friction between the bottom of the boats and the transport track, since during their movement the boats remain supported only on the drag bars; However, the problem of friction between the bars and the slots of the support blocks remains, both during the rotation movement and the longitudinal displacement movement, under load or without load, of said bars.

As in the document mentioned above, this friction is associated with a significant increase in the energy consumption necessary to move the spinning boats along the transport device, and the company can access by gravity the interior of the slots in which they are The tow bars are arranged, which can make the movement of said tow bars difficult and complicate cleaning tasks.

An important problem with this transport device is determined by the long length of the bars which, during their rotary operation, are subjected to a high torsional stress, which can cause their deformation in the long run and that the planes defined in the They do not remain coplanar along the entire length of the bars.

Therefore, the technical problem that arises is the development of an object transport device, suitable for the transport of spinning cans, which has technical characteristics aimed at minimizing the energy consumption necessary for its operation and facilitating cleaning tasks. and maintenance of the transport device.

Explanation of the invention

The transport device object of this invention, suitable for the transport of spinning cans, comprises at least one transport track provided with fixed plates that form a support surface for the objects to be transported in a static position, that is, while remain immobile, and moving plates mounted on a longitudinal beam capable of movement in a vertical direction and connected to driving means that transmit an alternative longitudinal movement of forward and backward along the transport track.

The aforementioned longitudinal beam is mounted on support carriages provided with support and displacement bearings on longitudinal raceways of the transport track during its alternative longitudinal movement.

These bearings significantly reduce the friction between the support carriages and the transport track and consequently the energy consumption necessary to cause the forward and backward movements of the mobile plates which, as will be explained later, are responsible for supporting the objects or spinning boats in a forward direction along the transport track.

The aforementioned support carriages comprise a transverse axis of rotation with respect to the beam and rotate with respect to said axis of rotation between: - an operative forward position, - an inoperative reverse position and - extreme positions for changing position, from operative to inoperative, and vice versa.

In the forward operating position, the longitudinal beam rests on a rear end, of greater height, of the support carriage and said longitudinal beam is located in a superior position and the mobile plates mounted on said longitudinal beam protrude superiorly from the plane defined by the fixed plates, said moving plates forming a support surface for the objects to be transported during their forward movement.

In the inoperative retracting position, the longitudinal beam rests on a front end, of lower height, of said support carriage, so that the beam is located in a lower position and the moving plates are arranged below the plane of the fixed plates, without contact with the objects to be transported.

During the backward movement of the moving plates, the objects to be transported remain in a static position, resting on the fixed plates of the transport track.

In the extreme position change positions, the carriage bearings are housed in windows or recesses defined at the respective ends of the raceways and descend below a plane defined by the raceways.

Said rolling tracks have a length slightly less than the length of the forward and backward movements of the carriages, so that the ends of said windows or recesses form stops that automatically cause the change of position of the carriages, operational position. to inoperative or vice versa, when the direction of advance of the support carriages is reversed.

When the support cars reach one end of their travel, the bearings of the support cars are housed in the aforementioned windows, leaving said cars suspended from the longitudinal beam by means of the corresponding transverse axis of rotation.

When changing the direction of advance, the carriage bearings contact the stop formed by the end of the corresponding recess or window, automatically changing their position with respect to the previous travel, that is, from the operative forward position to the inoperative reverse position. , or vice versa.

According to the invention, the longitudinal beam has support blocks at the bottom on the raceways in the extreme forward and backward positions of the carriages. Said support blocks limit the descent of said longitudinal beam since in said extreme positions the bearings are not supported on the raceways.

Advantageously, the transport track comprises two lateral rows of fixed plates and a longitudinal channel, arranged between said rows and with a width slightly greater than the mobile plates, the spar and the movable carriages being housed in said longitudinal channel of the transport track. .

The moving plates are simply supported on the beam, and can be extracted manually by means of an upward movement; For this purpose, said mobile plates comprise lower tabs housed vertically in slots defined in a support fixed to said longitudinal beam.

Removing the aforementioned mobile plates allows easy access to the longitudinal channel for cleaning or maintenance tasks on the mobile elements that move inside.

The driving means responsible for causing the alternating forward and backward movements comprise a transmission element connected to the longitudinal beam and a linear or rotary motion generator.

Brief description of the content of the drawings.

To complement the description that is being made and in order to facilitate the understanding of the characteristics of the invention, this descriptive report is accompanied by a set of drawings in which, for illustrative and non-limiting purposes, the following has been represented:

- Figure 1 shows a perspective view of a section of the object transport device, according to the invention, in which two objects have been represented, specifically two spinning cans, located on said transport device.

- Figure 2 shows a perspective view of the section of the transport device of the previous figure, in which the moving plates have been removed to allow observation of the interior of the longitudinal channel of the transport track.

- Figure 3 shows a perspective view of one of the support cars.

- Figure 4 shows a perspective view of the support carriage of the previous figure sectioned by a vertical median plane.

- Figure 5 shows a side view of the transport device, longitudinally sectioned by a vertical plane, in an advanced operating position.

- Figure 6 shows a front view of the transport device in the forward operating position of Figure 5, and in which one of the objects to be transported has been represented resting on the mobile plates responsible for moving it longitudinally.

- Figure 7 shows a section analogous to that of Figure 5, with the support carriage in an extreme position change position.

- Figure 8 shows a view analogous to Figure 7, during the movement of the carriage in an inoperative reverse position, in which the moving plates are located below the plane defined by the fixed plates.

- Figure 9 shows a front view of the transport device in the inoperative reverse position of Figure 8, in which the moving plates located below the fixed plates can be observed, and in which an object has been represented. transport supported in a static position on the fixed plates of the transport track.

Detailed presentation of embodiments of the invention.

As shown in Figure 1, the object transport device comprises a transport track (10) that comprises: fixed plates (20) forming two parallel longitudinal alignments, a longitudinal channel (21) defined between the fixed plates (20) ), and some mobile plates (30) forming an alignment in correspondence with the longitudinal channel (21).

The fixed plates (20) and the mobile plates (30) define surfaces for the alternative support of the objects (60) to be transported, represented in Figure 1 by means of two spinning boats.

As shown in Figure 2, inside the channel (21) there is a longitudinal beam (40) mounted on carriages (50) provided with bearings (51) for its alternative longitudinal movement on rolling tracks ( 22) that end in recesses or windows (23) whose ends define stops for changing the position of the carriages (50) when their direction of movement is reversed.

Figure 1 shows schematically the driving means (43) responsible for causing the alternative linear displacement of the carriages (50) and the beam (40) that supports the mobile plates (30). These driving means (43) are schematically represented by a chain driven by a reduction motor (not shown).

As shown in Figures 3 and 4, the carriages (50) comprise bearings (51) mounted on a body that has a lower front end (53) and a higher rear end (54), being mounted said carriages (50) with the possibility of rotation and by means of a transverse axis (52) in the spar (40).

As shown in Figures 5 and 6, when the carriages (50) move in the direction of advance (towards the right of the drawing), said carriages (50) are supported with the bearings (51) on the raceways ( 22) and the beam (40) rests on the rear end (54) of greater height of the carriages (50), said beam being located in a higher position and the mobile plates (30) above the plane defined by the fixed plates (20), as shown in Figure 6.

In this position, the objects (60) to be transported rest on the moving plates (30) and are moved by said moving plates (30) in the direction of advance.

When the extreme forward position shown in Figure 7 is reached, the bearings (51) surpass the corresponding end of the raceway (22), reaching a position change area in which the bearings (51) access the interior. of the respective windows (23) and descend to a plane located below the plane defined by the rolling tracks (22), leaving the carriages (50) suspended from the beam (40) by means of the corresponding transverse axis (52).

In this position, the descent of the stringer (40) is limited by the contact of some support blocks (41), fixed below said stringer (4), with the raceways (22) or with the bottom of the channel (21). . In this position, due to the lowering of the beam (40), the moving plates (30) are located below the plane defined by the fixed plates (20), so that the objects (60) to be transported are supported on the fixed plates. (twenty).

Starting from the position shown in Figure 7, when the reverse movement begins, the carriages (50) automatically move to an inoperative reverse position because the bearings (51) collide frontally against the stop defined by the end of the windows (23) shown in Figure 2, or against the end of the raceway (22).

This stop causes the carriages (50) to rotate on the corresponding transverse axis (52) towards an inoperative return position, represented in Figures 8 and 9, in which said carriages (50) are supported again by the bearings (51). on the raceways (22), and the spar (40) rests on the front end (53), of lower height, of the carriages (50).

In this position, the beam (40) is maintained in a lower position and the moving plates (30) are located below the plane defined by the fixed plates (20), with the objects (60) remaining, during this recoil movement, supported on a static position on the fixed plates (20) of the transport track (10), as shown in Figure 9.

When the carriages (50) reach the extreme position of the reverse movement, they are automatically placed in a position change position, analogous to that described above but at the opposite end of the rolling tracks (22), returning again to the position forward operating direction, represented in figures 5 and 6. When the movement of the carriages (50) begins in the forward operating direction and the bearings (52) collide with the stop defined by the end of the corresponding window (23) and they are placed again on the raceways (23).

Therefore, during both forward and reverse movements, the carriages (50) move on the bearings (51), eliminating friction problems and reducing the energy consumption necessary for the operation of the transport device.

The mobile plates (30) are manually removable to facilitate the cleaning of the channel (21) and the maintenance of the mobile elements housed in said channel.

In this embodiment, the mobile plates (30) have tabs (31), oriented towards the lower area, which are housed vertically in slots (42) defined in a support integral with the beam (40) and which can be observed with clarity in figure 2.

Once the nature of the invention has been sufficiently described, as well as an example of a preferred embodiment, it is stated for the appropriate purposes that the materials, shape, size and arrangement of the described elements may be modified, as long as this does not entail an alteration. of the essential characteristics of the invention claimed below.

Claims (8)

1. Object transport device, suitable for the transport of spinning cans, comprising at least one transport track (10) provided with fixed plates (20) that form a support surface for the objects (60) to be transported. in a static position; characterized by: - the transport track (10) comprises moving plates (30) mounted on a longitudinal beam (40) housed in a channel (21) of the transport track (10) and capable of movement in a vertical direction; - said beam (40) is connected to driving means (43) that transmit an alternative longitudinal movement of advance and retreat along the transport track (10) and is mounted on support carriages (50); - said carriages (50) comprise a rear end (54) of greater height, a front end (53) of lower height, bearings (51) for support and movement on longitudinal rolling tracks (22) of the transport track. (10) during its alternative longitudinal movement, and a transverse axis (52) of rotation with respect to the spar (40) between: • a forward operating position, in which the beam (40) rests on the rear end (54), of greater height, of the carriages (50) and the mobile plates (30) protrude above the plane of the fixed plates (20) and form a support surface for the objects (60) to be transported during their forward movement; • an inoperative reverse position, in which the beam (40) rests on the front end (53), of lower height, of the carriages (50) and the mobile plates are arranged below the plane of the fixed plates ( 20) and without contact with the objects (60) to be transported and; • extreme position change positions, in which the bearings (51) are housed in position change recesses or windows (23) and descend to a plane located below the raceways (22). 2. Device according to claim 1, characterized in that the rolling tracks (22) have a length slightly less than the length of the forward and backward movements of the mobile plates (30); and the recesses or windows (23) for changing the position, operational or inoperative, of the carriages (50) are arranged at the opposite ends of said rolling tracks (22). 3. - Device, according to claim 2, characterized in that the recesses or windows (23) have ends that form stops for changing the position of the carriages (50) during the change in the direction of movement of said carriages. 4. - Device, according to claim 3, characterized in that the beam (40) has support blocks (41) on the rolling tracks (22) in the extreme forward and backward positions of the carriages (50). . 5. Device, according to any previous claim, characterized in that the transport track (10) comprises two lateral rows of fixed plates (20) and a longitudinal channel (21) defined between the two rows of fixed plates (20) and a width slightly larger than the moving plates (30). 6. Device, according to claim 5, characterized in that the beam (40) and the carriages (50) are housed in the longitudinal channel (21) of the transport track (10). 7. - Device, according to any previous claim, characterized in that the mobile plates (30) are supported on the beam (40) and comprise lower tabs (31) housed vertically in slots (42) defined in a support fixed to said spar (40). 8. Device, according to any preceding claim; characterized in that the driving means (43) comprises a transmission element connected to the beam (40) and a linear or rotary motion generator.