JPH0655972B2 - Apron equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of an apron device used for drafting a spinning machine.

(Prior Art) Generally, a drafting device used in a spinning machine, particularly a roving machine, a spinning machine, or the like is composed of a front roller, a middle roller, a back roller, and the like, and the top roller of each roller is centered around a top arm. It is installed on both sides. Then, in order to perform the draft more uniformly, an apron is mainly attached to the middle roller which is the main draft area. The middle roller to which the apron is attached is a top arm that supports a shaft body having top rollers at both ends, and an apron ring that is engaged with the shaft body and whose both ends are suspended by the top roller. And an apron tensor for restricting the traveling position and a pressure member such as a spring installed between the top arm and the apron tensor, and the apron tensor has a protrusion for controlling the traveling position. An inverted U-shaped groove for engaging with a shaft at a position close to each tongue on the center side of the main body part, the main body part having a tongue part abutting on the inner surface of the apron And a locking portion for holding the apron tensor at a predetermined interval in a state substantially parallel to the shaft body is integrally formed.

As an apron device having such a structure, for example, Japanese Patent Publication No.
7-56569.

(Problems to be Solved by the Invention) In the configuration of the apron tensor having the two engaging portions having the inverted U-shaped groove as described above, the apron tensor can freely rotate around the shaft body. However, it is almost impossible to move freely in the horizontal and vertical directions. On the other hand, when observing the apron microscopically, there are thickness unevenness, hardness unevenness, rigidity unevenness, etc. in the circumferential direction even within one apron, so the nip state at the tip of the apron is delicate during one rotation of the apron. The state of the change also changes according to the apron. for that reason,
If two top rollers for one spindle are attached to one top arm, support the pressing force at the four apron parts on both sides and the two engaging parts that engage with the shaft. Therefore, the uniform contact pressure cannot be obtained due to the processing accuracy of the apron tensor, the thickness unevenness of the apron, the hardness unevenness or the thickness unevenness of the fiber bundle, and the vibration of the apron of one of the weights remains as it is through the apron tensor. It is transmitted to the apron of the other weight, and the contact pressure of the apron cannot always be made uniform, which causes draft spots. Also, by pressing the apron tensor, tension is generated in the aprons attached to the top roller and apron tensor, so uniform tension cannot be applied to the left and right aprons. , The apron on one side slips and causes draft spots. Furthermore, when the top arm is rotated upward to temporarily stop the draft process, there is nothing that supports the pressing force that is constantly acting on the apron tensor, so the apron tensor engages with the shaft body of the top roller. Rotate downward with the mating locking portion as a fulcrum. Therefore, to perform draft processing,
When the top arm was rotated downward, the apron tensor abutted against the apron mounted on the bottom roller with the apron tensor facing downward, and there was a problem that each top roller could not abut the bottom roller. .

(Purpose) The present invention solves the above-mentioned problems and enables vertical and horizontal movements of left and right aprons in an almost independent state so that the contact pressure of each apron is always uniform. At the same time, it was obtained as a result of examination for the purpose of preventing the apron tensor from rotating even when the top arm is rotated upward.

(Means for Solving the Problem) That is, the present invention relates to a top arm that supports a shaft body having top rollers at both ends, and an apron that is engaged with the shaft body and has both ends thereof suspended by the top roller. An apron tensor that is located in the ring and regulates the traveling position,
In a device constituted by a pressure member installed between the top arm and an apron tensor, the apron tensor is formed with a tongue portion at both ends which has a protrusion for restricting a traveling position and is in contact with an inner surface of the ring of the apron. A main body portion, a locking portion that is located substantially in the center of the main body portion and that engages with the shaft body to regulate the vertical position, and is located approximately in the middle of the locking portion and the tongue portion. The apron tensor rotates by contacting the abutting part that holds the apron tensor at a predetermined interval in a state substantially parallel to the shaft, and the abutting top roller shaft that is substantially concentric with the engaging part and adjacent to the top roller shaft. (EN) Provided is an apron device which is formed by a claw portion which prevents movement and which has a spring for tensioning an apron attached to a corresponding contact portion.

(Embodiment) The construction of one embodiment of the draft mechanism in which the apron device of the present invention is mounted will be described based on the drawings.

1 is a front bottom roller, 2 is a middle bottom roller,
Reference numeral 3 denotes a back bottom roller, which is fixed to each shaft rotatably mounted on a machine frame (not shown). A front top roller 4 is rotatably mounted on both sides of the shaft body 5. Reference numeral 6 denotes a middle top roller rotatably mounted on both sides of the shaft body 7. Reference numeral 8 denotes back top rollers rotatably mounted on both sides of the shaft body 9. These shafts 5, 7, 9 are attached to a top arm 10 rotatably mounted on a machine frame (not shown), and each top roller 4,
The rollers 6 and 8 are brought into contact with the bottom rollers 1, 2 and 3 with a predetermined surface pressure. Reference numeral 11 denotes a bottom apron suspended from the middle bottom roller 2, which is tensioned by the ten server 12. Reference numeral 13 denotes a top apron suspended from the middle top roller 6, which is tensioned by an apron tensor 14. The apron tensor 14
Is a tongue piece 14b for tensioning the top apron 13 from both ends of the body 14a and the top apron 1
3 is formed with a projection 14c for restricting the traveling position, and locking portions 14d for contacting the upper surface of the shaft body 7 at substantially the central portion and for controlling the vertical position are provided on both sides of the locking portion 14d. An abutting portion 14e for making the apron tensor 14 parallel to the shaft body 7 is formed. Also, the locking portion 1
4d has substantially the same shaft center, and on the opposite side thereof, a claw portion 14f is integrally formed to prevent the apron tensor 14 from rotating around the shaft 7 as a fulcrum. The claw portion 14f
Is made of different parts from the apron tensor 14, screws,
Alternatively, they can be integrally attached with an adhesive or the like.
The above-mentioned locking portion 14d is formed so as to contact the upper surface of the shaft 7 when the thin plate-like object is horizontal as shown in FIG. 3, or when the thin plate-like object is vertical as shown in FIG. The reverse U-shaped groove is formed so as to engage with the shaft 7, and the range in which the apron tensor 14 can be rotated with the locking portion 14d as a fulcrum is increased. It is necessary to set it to 1/10 or less of the width of 10, and it is preferable to set it as narrow as possible so as to make point contact.

Further, the contact portion 14e is formed by a rod-shaped object as shown in FIG. 3 so that it can be attached and replaced by a screw, or a thin plate-shaped object as shown in FIG. 4 and formed integrally with the apron tensor. To do. Reference numeral 15 is a pressurizing spring mounted between the top arm 10 and the apron tensor 14, and presses the apron tensor 14 through the rod 16 to tension the top apron 13, and the tip of the apron 13 is bottomed. The tip of the apron 11 is pressed into contact. The spring 15 is installed at one place in the substantially central portion of the apron tensor 14 or at two places so as to sandwich the locking portion. Reference numeral 17 denotes a spring mounted on the abutting portion 14e of the apron tensor 14 so that a pressing force acts in a direction in which the apron tensor 14 separates from the top roller, and each apron 13 is tensioned with a constant force. ing.

The shaft 7 of the middle top roller 6 is pressed by the pressing member 18 and is brought into pressure contact with the middle bottom roller 2.

(Effects of the Invention) The present invention has a top arm for supporting a shaft body having top rollers at both ends as described above, and an apron ring engaged with the shaft body and having both ends thereof suspended by the top roller. And an apron tensor that regulates the traveling position,
In the device configured by the above-mentioned top arm and a pressure member installed between the apron tensor, the apron tensor has a tongue portion that has a protrusion for traveling position regulation and abuts against the inner surface of the ring of the apron at both ends. Formed body part,
An engaging portion located substantially in the central portion of the main body portion and engaging with the shaft body to regulate the vertical position, and an apron tensor located at an approximately intermediate portion between the engaging portion and the tongue portion on the shaft body. The apron tensor is prevented from rotating by abutting portions for holding a predetermined distance in a substantially parallel state and abutting the top roller shaft body that is substantially concentric with the engaging portion and adjacent to the top roller shaft body. The following effects can be obtained by forming the springs for tensioning the apron at the corresponding contact portions while being formed by the claw portions.

(1) As in the conventional case, the apron tensor is not subjected to the pressing force of the pressure member at the two positions of the shaft body and the two positions of the left and right aprons, and the apron tensor is in contact with the upper surface of the shaft body and the left and right locking parts. Since the pressing force of the pressing member is received at three points on the tip of the apron, the apron can move freely in the vertical and horizontal directions with the locking portion as a fulcrum. Therefore, even if one apron side vibrates, only one apron side moves up and down with the other apron as it is, with the locking part as the fulcrum of the apron tensor.
The influence of one apron does not act on the other apron, and the contact pressure of the apron can always be kept constant.

(2) Since the aprons are tensioned with a constant force by the springs attached to the abutting portions, uniform drafting can be performed without producing slits or the like.

(3) Since the drafting process is temporarily stopped, even if the top arm is rotated upward, the claw portion formed on the apron tensor is brought into contact with the upper surface of the shaft of the adjacent top roller to rotate it. Instead, when the top arm is rotated downward to perform the draft process, the top roller and the top apron can be brought into contact with the bottom roller and the bottom apron.

(4) If the contact portion is made replaceable, even if the apron length is changed, it can be easily dealt with by simply changing the contact portion.

[Brief description of drawings]

FIG. 1 is a schematic view showing one embodiment of the apron device of the present invention. FIG. 2 is a schematic perspective view showing the apron tensor mounting portion in FIG. FIG. 3 is a schematic perspective view showing one embodiment of the apron tensor of the present invention. FIG. 4 is a schematic perspective view showing another embodiment of the apron tensor of the present invention. 2: Middle bottom roller, 6: Middle top roller, 7: Shaft body, 10: Top arm, 11: Bottom apron, 12: Ten apron, 13: Top apron, 14: Apron tensor, 14a: Body part, 14b: Tongue Part, 14d: locking part, 14e: contact part, 14f: claw part, 15, 17: spring,

 ─────────────────────────────────────────────────── ─── Continuation of the front page Examiner Hiroyuki Sugino (56) References JP-A-64-20330 (JP, A)

Claims (1)

[Claims] 1. A top arm for supporting a shaft body having top rollers at both ends, and a running position which is engaged with the shaft body and whose both ends are located in a ring of an apron suspended by the top roller. In a device constituted by an apron tensor for regulating the apron tensor and a pressure member installed between the top arm and the apron tensor, the apron tensor has a protrusion for traveling position regulation and abuts against the inner surface of the apron ring. A main body portion having tongue portions formed at both end portions; a locking portion located substantially in the center of the main body portion and engaging with the shaft body to regulate the vertical position; and the locking portion and the tongue portion. Of the apron tensor, which is located approximately in the middle part of the apron tensor and which holds the apron tensor at a predetermined interval in a state substantially parallel to the shaft body, and the top roller shaft body, which is substantially concentric with the locking portion and is adjacent to the abutting portion. Apron tensor turns when abutting Together allowed to form by a claw portion for preventing the apron device being characterized in that allowed mounting a spring for apron tension abutting portion.