JPH04289251A - Apparatus for transmitting power to fabric-feeding roll of circular knitting machine - Google Patents

Abstract

PURPOSE:To control the rotational speed in high accuracy even if an error is present in the length of a belt between pulleys by using a specific pulley and its fixing means in a rotary speed changer placed in a power-transmission system to a knit fabric feeding roll. CONSTITUTION:A variable diameter pulley is used as a follower pulley 34 of a rotary speed changer 31 placed in a system 22 to transmit power to fabric feeding rolls 13, 14, 15. A belt 35 is extended between the follower pulley 34 and the driving pulley 33. The pulley 33 is rotatably supported on a protrusion 39 of an arm plate 37. When the arm plate is rotated around the center of a circular disk 38 of the plate, the pulley 33 approaches to or separates from the pulley 34. The rotational motion of the arm plate is regulated by the rotational operation of handles 41, 42 screwed to side plate 6 through slits 38a, 38b of the circular disk part 38.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention relates to a knitted fabric feeding roll for feeding a cylindrical knitted fabric knitted from the knitting section of a circular knitting machine to a winding section disposed below the knitting section. The present invention relates to a power transmission device that transmits rotational driving force.

0002

[Prior Art] A circular knitting machine generally has a knitting section having a rotationally driven cylinder base, and is placed below the knitting section, and winds up a cylindrical knitted fabric knitted from the knitting section. The winding section is configured to have a winding section. and,
The winding section is rotatably supported in a suspended state, and
It is connected to the cylinder base via an interlocking mechanism and is driven to rotate at a rotational speed that matches the speed of the knitted fabric knitted from the knitting section.

[0003]The winding section is provided with a fabric feeding roll at a position close to the knitting section for feeding the knitted fabric knitted in the knitting section out of the knitting section and into the winding section. It is being The knitted fabric feeding roll is driven to rotate by transmitting the rotation of the winding section to the roll via a power transmission device. This power transmission device controls the rotational speed of the knitted fabric feeding roll.
A rotary speed change device is incorporated to adjust the knitting speed of different knitted fabrics depending on the knitting structure, etc.

Conventionally, this rotary transmission device passes a belt through a pair of variable diameter pulleys, and adjusts the belt support diameter of both pulleys to adjust the rotational speed of the knitted fabric feed roll. What has been done is known.

[0005]

[Problems to be Solved by the Invention] Generally, in a pulley type rotary transmission device, when changing the speed of the knitted fabric feeding roll, it is necessary to adjust the speed ratio by adjusting the belt support diameter of the pulley and to maintain the belt in an appropriate tension state. However, in the conventional pulley type transmission described above, belt tension adjustment could only be done by adjusting the belt support diameter of both pulleys. However, there is a problem in that the adjustment takes time and effort for an ordinary worker who is not familiar with such complicated compound adjustment work.

[0006] Furthermore, if the belt becomes slightly elongated due to long-term use, the belt will become slack even when the gear ratio is adjusted to a desired gear ratio. If the belt support diameter of the pulley is adjusted to take up this slack, the gear ratio will change. This dilemma arises, and there is also the problem that the speed ratio cannot be adjusted accurately depending on the belt used or its dimensional state.

[0007] The present invention solves the above-mentioned conventional drawbacks, makes it possible to easily adjust the rotational speed of the roll for feeding the knitted fabric, and even when there is an error in the length of the belt. It is an object of the present invention to provide a power transmission device for a knitted fabric feeding roll in a circular knitting machine, which can perform the adjustment with high precision.

[0008]

[Means for Solving the Problems] To achieve the above object, the present invention provides a power transmission system for a knitted fabric feeding roll that sends a knitted fabric knitted from a knitting section to a winding section, by applying a driving force from a drive source side. A rotary transmission device is provided, which has a drive-side pulley that is rotationally driven by the knitted fabric feeding roll, a driven-side pulley that transmits rotation to the knitted fabric feeding roll, and a rotation transmission belt that is passed between both pulleys. , a power transmission device for a knitted fabric feeding roll in a circular knitting machine, wherein one pulley of the rotary transmission device is constituted by a variable diameter pulley, and both pulleys are configured such that the belt is tensioned. relatively close to each other so that the spacing distance between the rotational axes of the
A knitted fabric feeding roll in a circular knitting machine, characterized in that it is provided with pulley fixing means that is supported in a manner in which the pulleys are moved apart and that maintains a constant distance between the rotational axes of both pulleys when the belt is tensioned. This paper focuses on power transmission devices.

[0009]

[Operation] In the above structure, the rotational speed of the knitted fabric feeding roll is adjusted as follows. That is, the fixed state by the pulley fixing means is released, and the distance between both pulleys can be freely changed. Then, in this state, the belt support diameter of the variable diameter pulley is adjusted so that a predetermined gear ratio is achieved. Thereafter, the pulleys are relatively moved in directions away from each other to tension the belt. Thereafter, in this tensioned state, the pulley is fixed by the pulley fixing means. With the above steps, adjustment of the rotational speed of the feed roll is completed.

0010

Embodiments Below, embodiments of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2 showing the winding section of a circular knitting machine, (1) indicates a fixed frame that supports the knitting section;
(2) is a winding section.

The fixed frame (1) includes a three-sided radial bottom member (3) placed on the floor, and three legs (4) attached to the tip of the bottom member (3) in an upright state. A head (5) is supported at the upper end of the leg (4). A knitting section (not shown) including a cylinder base is disposed above the head (5).

[0013] The winding part (2) has left and right side plates (6) and (7).
It has an upwardly U-shaped rotating frame (9) whose lower ends are connected by a connecting bar (8), and the rotating frame (9) includes:
It is supported in a suspended state within a fixed frame (1). The rotating frame (9) is connected to the cylinder base of the knitting section via an interlocking mechanism (not shown), and in conjunction with the cylinder base, the cylindrical knitted fabric (A) is knitted from the knitting section. It is assumed that the rotation speed is the same as that of the

[0014] Both side plates (6) of the rotating frame (9)
) (7) A reel roll (10) is passed between the lower ends of the reel roll (10) so as to be movable in the vertical direction.
10), the friction roll (1
1) is passed, and by the rotation of this friction roll (11), the knitted fabric (A) is wound onto the reel roll (10), and as the amount of winding of the knitted fabric (A) increases, the reel roll ( 10) is moved upward.

In addition, three knitted fabric feeding rolls (1
3) (14) and (15) have been given. A roll (13) located on one side is a driving roll, and the roll (13)
Due to the rotation of the gear (16), as shown in FIG.
(16) (16) to other two rolls (14) (
15) is rotated at the same speed as a driven roll.

[0016] These three feeding rolls (13) (14)
The support of (15) is based on the following aspect. That is, as shown in FIG. 4, a rocking plate (18) is attached to the inner surface of the upper end of both side plates (6) and (7) so as to be swingable in the vertical direction at an intermediate portion thereof. In this position, a feed drive roll (13) is supported and this drive roll (1
Adjacent to 3) are two other feeding driven rolls (14) (
15) is supported on the rocking plate (18). This rocking plate (18) is supported by a spring (19).
The driven rolls (14) and (15) are urged in a direction to lower them,
Normally, it is held in the abutting position by abutting against the abutting piece (20).

In order to transmit the rotation of the rotating frame (9) to the drive roll (13) for feeding the knitted fabric, the following power transmission device (22) is incorporated.

That is, in this power transmission device (22), as shown in FIG. 1, an immovable sun bevel gear (23
) is attached, while the rotary shaft (24
) is protruded, and a planetary bevel gear (25) provided at the tip of the shaft (24) is connected to the sun bevel gear (
23). As shown in FIG. 3, a vertical gear train (26) is provided on the outer surface of the lower half of the side plate (6), and the lowest input gear (26a) is provided on the outer surface of the lower half of the side plate (6).
) is connected to the base end of the rotating shaft (24). As a result, as the rotating frame (9) rotates, the planetary bevel gear (25) revolves around the sun bevel gear (23) on the fixed frame (1) side and rotates, thereby rotating the rotating shaft (24). The rotation is transmitted from the input gear (26a) of the gear train (26) to the output gear (26a) located at the top of the gear train (26).
6b).

On the other hand, as shown in FIGS. 3, 4, and 6, at the end of the knitted fabric feeding drive roll (13), there is a worm wheel (28 ) is connected to the worm wheel (28), a worm (29) is meshed with the worm wheel (28), and the rotation of the worm (29) drives the feed rolls (13, 14, and 15) to rotate. .

As shown in FIG. 3, in order to transmit the rotation of the output gear (26b) at the top of the gear train (26) to the worm (29),
) (29) is provided with a pulley type transmission (31).

This pulley type transmission (31) includes a drive pulley (33) which is rotated by the rotation of the topmost gear (26b) of the gear train (26), and a worm (29).
) and a belt (35) wound around the driven pulley (34).

[0022] As the drive side pulley (33),
A non-variable diameter pulley whose belt support diameter cannot be adjusted is used, and a variable diameter pulley whose belt support diameter can be adjusted is used as the driven pulley (34), and the driving pulley (33) is a driven pulley. Side pulley (34)
The belt (35) is supported so as to be able to move toward and away from the belt, and the belt (35) can be adjusted to a tensioned state by moving the drive pulley (33).

The movement of the driving pulley (33) towards and away from the belt for adjusting the belt is realized by the following structure. That is, as shown in FIG. 3, the output gear (26b) is attached to the rear surface of the output gear (26b) of the gear train (26) with the rotation axis of the gear (26b) as the rotation axis. A pulley moving arm plate (37) is supported which can be rotated independently of the pulley. This arm plate (37) includes a disc part (38) and a disc part (
38), and a protrusion (39) integrally protruding outward from one side of the circumferential end of the protrusion (38). The arm plate (37) has the output gear (26) with the center of the disc portion (38) as the axis.
b), and a driving pulley (33) is rotatably supported on the protrusion (39). As a result, by rotating the arm plate (37), the driving pulley (33) approaches and approaches the driven pulley (34) about the rotation axis of the arm plate (37). Will be moved away. An operating lever (40) is attached to the tip of the protrusion (39) for rotating the arm plate (37).

As a pulley fixing means, an arm plate (37) is used to fix the driving pulley (33) at a predetermined position where the belt (35) is tensioned.
) is provided with an arc-shaped slit (38a) having a predetermined length along the circumferential direction on one side of the circumferential end of the disc portion (38),
A fastening handle (41) is screwed onto the side plate (6) through the slit (38a), and by rotating the handle (41), the arm plate (37) is fastened to the side plate (6) and rotated. It is supposed to be fixed in an impossible state. That is, by loosening the fastening handle (41), the arm plate (37) can be freely rotated, and the pulley interval can be adjusted. Also,
By tightening the handle (41), rotation of the arm plate (37) is restricted and the distance between the pulleys is maintained constant. In addition, the disc part (38) of the arm plate (37)
) is also provided with an arcuate slit (38b) of a predetermined length along the circumferential direction on the other side of the peripheral end of the slit (38b).
b) A fastening bolt (42) is screwed into the side plate (6). As a result, with the driving pulley (33) positioned and the fastening handle (41) tightened,
By tightening the fastening bolt (42), the arm plate (38
), and the movement of the drive pulley (33) can be controlled stably and firmly.

In order to transmit the rotation of the output gear (26b) at the top of the gear train (26) to the drive pulley (33) whose position is changed as described above, the following structure is adopted. ing. That is, as shown in FIG. 3, at the tip of the protrusion (39) of the arm plate (37),
The transmission gear (43) is concentric with the drive pulley (33).
is attached in such a manner that it rotates together with the pulley (33). This transmission gear (43) is meshed with the output gear (26b). This allows the driving pulley (33) to be connected to the driven pulley (34).
When the transmission gear (43
) revolves around the output gear (26b) as a sun gear in the form of a planetary gear, so no matter where the drive pulley (33) is stopped, the transmission gear (43)
is always kept in mesh with the output gear (26b), and when adjusting the pulley interval, the gear train (26b)
) and the drive-side pulley (33) without having to modify the transmission system.

On the other hand, the variable diameter pulley (34) on the driven side
As shown in FIG.
A plurality of belt support pieces (47) are disposed in the circumferential direction between a disk (45) having a groove (5a) and a disk (46) having a plurality of grooves (46a) extending in the radial direction on the inner surface. and pins (47) attached to each belt support piece (47).
a) is arranged in both grooves (45a) and (46a), and by relatively rotating both disks (45) and (46), all belt support pieces (47) are radially moved simultaneously. The belt support diameter is thereby adjusted. In addition, (48) is a fastening handle, and by rotating this handle and fastening both discs (45) and (46) with the support piece (47) in between, both discs (45) The relative rotation of (46) is regulated and the belt support diameter is fixed.

The driven pulley (34) is connected to the swing plate (1) as shown in FIGS. 3 and 4.
8), a driven roller for feeding (14
) (15) is rotatably supported at the end opposite to (15). The reason why the driven pulley (34) is supported by the rocking plate (18) in this way is that the knitting speed of the knitted fabric (A) is higher than the feeding speed of the rolls (13), (14), and (15). When the speed is slightly slow, the tension generated in the knitted fabric (A) causes the rocking plate (18) to rock against the biasing force of the spring (19), and thereby the driven pulley (34) is moved closer to the drive pulley (33), the belt (35) is slipped, and the drive pulley (33) is moved closer to the drive pulley (33).
This is to prevent the rotation of the pulley (33) from being transmitted to the driven pulley (34). And the driven side pulley (
34) to the worm (29), between them, as shown in FIGS. 3, 4, and 6,
A gear box (49) is provided supported on the rocking plate (18) side. This gearbox (49)
Inside, a bevel gear (49a) connected to the driven pulley (34) and a bevel gear (49b) provided on the worm (29) side are accommodated in a mutually meshed state. That is, the rotation of the driven pulley (34) is transmitted to the worm (29) via both bevel gears in the gear box (49). The gear box (49) is rotatably supported together with the worm (29), and is configured so that it can be disengaged from the worm wheel (28), but it can be kept in the engaged state by the stopper (50). It is designed to maintain its position.

Note that (52) is the feed roll (13) (
14) This is a lever that adjusts the knitted fabric clamping force between (15). In addition, as shown in FIG. 1, in order to rotationally drive the friction roll (11), the other side plate (7) has a
A pair of upper and lower sprockets (55) (56) are provided,
The upper sprocket (55) is the feeding drive roll (13)
At the same time, the lower sprocket (56) is connected to the traction roll (11), and both sprockets (
A chain (57) is passed between 55 and 56.

In the above-mentioned circular knitting machine, the cylinder base cylinder is rotationally driven in the knitting section and the knitted fabric (A) is knitted, so that the rotation of the cylinder base cylinder is caused by the rotating frame (9
), planetary bevel gear (25), rotating shaft (24)
, gear train (26), drive pulley (33), belt (
35), driven side pulley (34), gear box (
The knitted fabric feeding roll (13) (
14) and (15), and this knitted fabric feeding roll (1
3) Through (14) and (15), the knitted fabric from the knitting section is sent out and sent toward the reel roll (10) in the winding section (2).

When the knitting speed of the knitted fabric (A) from the knitting section changes by changing the network structure etc. of the knitted fabric (A) to be knitted, as shown in FIG. By adjusting the device (31), the feeding roll (1
3) Change the rotational speed transmitted to (14) and (15). That is, the fastening operation handle (41) and the fastening bolt (
42) are loosened, thereby allowing the driving pulley (33) to freely move toward and away from the driven pulley (34). Then, the belt support diameter of the driven pulley (34) is determined by the knitting speed of the knitted fabric (A) to be knitted next and the feed roll (13) (
14) Set the diameter to match the rotation speed in (15). Subsequently, the driving pulley (33) is moved in a direction away from the driven pulley (34) using the operating lever (40) to tension the belt (35). Finally, the fastening handle (41) and fastening bolt (42) are tightened to fix the drive pulley (33) in that position. By the above adjustment work, the feed roll (13
) (14) and (15) are adjusted to match the knitting speed of the next knitted fabric.

[0031] Also, feeding rolls (13) (14) (1
If it is necessary to greatly change the rotational speed of gear train (2) beyond the adjustment range of the transmission (31),
This can be easily handled by rearranging the gears in step 6).

[0032]

[Effects of the Invention] As described above, in the power transmission device for the knitted fabric feeding roll in a circular knitting machine according to the present invention, one pulley in the rotary transmission device provided therein is constituted by a variable diameter pulley. At the same time, both pulleys are supported in such a manner that they can be relatively moved toward and away from each other so that the distance between their rotational axes can be adjusted in order to tension the belt, and when the belt is tensioned, both pulleys A pulley fixing means is provided to maintain a constant distance between the rotational axes of the two.

Therefore, in the work of adjusting the rotational speed of the knitted fabric feeding roll, belt tension after adjusting the gear ratio using the variable diameter pulley is achieved by a simple operation of adjusting the distance between the pulleys, and the knitted fabric is The rotational speed of the feed roll can be easily adjusted without any skill.

Moreover, since the belt tension in gear ratio adjustment is performed by changing the distance between the pulleys as described above, the gear ratio does not change accordingly. Therefore, even if the belt has elongated due to long-term use, or if the belt length has a certain degree of error, the rotational speed of the rolls can be adjusted with high precision.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the overall structure of a circular knitting machine with the knitting section omitted.

FIG. 2 is a perspective view of a winding section.

FIG. 3 is an overall front view of the side plate of the rotating frame on which the power transmission device is assembled.

FIG. 4 is an overall rear view of the side plate of the rotating frame on which the power transmission device is assembled.

FIG. 5 is an exploded perspective view showing the structure of the variable diameter pulley.

FIG. 6 is a perspective view showing a transmission system that transmits rotation from the driven pulley to the feed roll.

FIG. 7 is a front view showing a method of adjusting the transmission.

[Explanation of symbols]

A...Knitted fabric 2... Winding section 13, 14, 15...Knitted fabric feeding roll 22...Power transmission device 31...Transmission device 33...Drive side pulley 34...Driven side pulley 35...Rotation transmission belt 41, 42...Pulley fixing means

Claims (1)

[Claims] 1. A drive-side pulley that is rotationally driven by receiving a driving force from a drive source in a power transmission system to a fabric feeding roll that sends the knitted fabric knitted from the knitting section to the winding section;
A circular knitting machine equipped with a rotary transmission device having a driven pulley that transmits rotation to the knitted fabric feed roll and a rotation transmission belt passed between both pulleys. In the power transmission device, one pulley of the rotary transmission device is configured with a variable diameter pulley, and the distance between the rotation axes of both pulleys can be adjusted to keep the belt in tension. A circular knitting machine characterized by being equipped with a pulley fixing means that is supported in such a manner that the pulleys are moved relatively toward and away from each other, and that maintains a constant distance between the rotation axes of both pulleys when the belt is tensioned. A power transmission device for knitted fabric feeding rolls.