JPH04146253A - Roller traverse type embroidery machine - Google Patents

Abstract

PURPOSE:To enable prevention of an overlapped embroidery pattern by holding a base fabric through an intermediate roller on the outer periphery of feed rollers of a roller traverser and a tension roller in a strongly pressed state and suppressing slippage of the base fabric. CONSTITUTION:In a roller traverse type embroidery machine, a base fabric (K) stretched between a pair of feed rollers 40 of a roller traverser 30 arranged under a sewing machine head is led to the outer periphery of an intermediate roller 60 interposingly installed between the feed rollers 40 and a tension roller 50 so as to enable contact and separation therefrom. The base fabric is then turned over, passed through the outer periphery of the above-mentioned tension roller 50 and wound around the outer periphery of a tie rod 34. A constant tension in the direction (Y) is always applied to the base fabric stretched over the feed rollers 40 with the tension roller 50 and the intermediate roller 60 is pressed to the outer peripheries of the feed rollers 40 and the tension roller 50 by the tension. As a result, the base fabric (K) is kept in a state thereof strongly pressed to both the rollers 40 and 50 at places (a) and (b) to suppress the slippage thereof.

Description

[Detailed Description of the Invention] 1. Field of Industrial Application] The present invention provides a roller traverse type embroidery machine for continuously embroidering a long original fabric (base fabric roll) wound into a roll. It is related to.

[Conventional technology]

A roller traverser in this type of embroidery machine (embroidery sewing machine) is disposed below the sewing machine head so as to be able to reciprocate. The roller traverser is provided with a pair of feed rollers that are arranged at a predetermined interval in a direction perpendicular to the reciprocating direction of the roller traverser and can rotate forward and backward in synchronization in the same direction. A base fabric unwound from a predetermined roll of base fabric is set in both of these feed rows in a stretched state. Based on the control for embroidery sewing, the base fabric is moved in the X direction by reciprocating the roller traverser, and the base fabric is moved in the X direction by synchronously rotating both feed rollers in the same direction. .

FIG. 7 schematically shows one feed roller side of a conventional roller traverser 130.

As is clear from FIG. 7, a tension roller 150 is disposed at a position closer to the outer side of the feed roller 140 and slightly lowered. Then, the base fabric is wound from the outer periphery of the feed roller 140 to the lower outer periphery of the tension roller 150, reversed, and then guided to the tie rod 134. Also, a pair of feed rollers 14 are provided for this base fabric K.
In order to apply tension in the X direction between 0 and 0, a rotational force in the direction of the arrow in FIG. 7 is always applied to the tension roller 150.

[Invention or problem to be solved]

In the roller traverser 130 shown in FIG. 7, the function of preventing the base fabric from slipping against the feed roller 140 is entrusted only to the tension applied to the base fabric K by the rotational force of the tension roller 150. For this reason, when the feed roller 140 rotates, especially when changing the rotational direction, the base fabric K cannot follow the feed roller 140, causing slippage between the feed roller 140 and the outer periphery of the feed roller 140, which may cause misalignment of the embroidered pattern.

Therefore, it is recommended to adopt a nip roller for pressing the base fabric K onto the outer periphery of the feed roller 140, or to change the arrangement of the tension roller 150 diagonally to the lower right in FIG. One possibility is to increase the area. However, when a nip roller is used, due to the limit of the rigidity of this roller, the pressing force in the axial direction of the nip roller becomes uneven, which may also result in misalignment of the embroidery pattern. Also, tension roller 1
When changing the arrangement of the tension roller 15,
0 is undesirable because it becomes a hindrance to ancillary work for sewing (such as replacing the bobbin thread bobbin in the hook).

A technical problem of the present invention is to use the tension of the base fabric stretched between the feed rollers to press the base fabric against the outer periphery of the feed roller and the tension roller, thereby preventing slippage between the feed roller and the base fabric. To provide a roller traverse type embroidery machine that can solve the problem.

[Means to solve the problem]

In order to solve the above problems, the present invention is configured as follows.

That is, in the roller traverse type embroidery machine of the present invention, the roller traverser is arranged below the sewing machine head so as to be able to reciprocate, and the roller traversers are arranged at predetermined intervals in a direction perpendicular to the direction of the reciprocating operation. A pair of feed rollers are provided to be able to rotate forward and backward in synchronization in the same direction, and a roller traverser is used with a long base fabric drawn out from a predetermined base fabric roll being stretched between these feed rollers. The base fabric is moved in the X direction by reciprocating, and the base fabric is moved in the X direction by rotating both feed rollers in forward and reverse directions, thereby creating continuous embroidery on the base fabric. There is.

In the above configuration, a pair of tension rollers are arranged adjacent to each feed roller and receive rotational forces in mutually opposite directions in order to apply tension in the X direction to the base fabric stretched between both feed rollers. and an intermediate roller disposed between the feed roller and the tension roller so as to be able to move toward and away from both of these rollers. Then, the base fabric stretched between both feed rollers is guided from the outer periphery of each feed roller to the intermediate roller,
The structure is such that it is wound around the outer periphery of the tension roller, reversed, and then guided to the outer periphery of the tension roller.

3. Effect] According to the above configuration, tension in the X direction is applied to the base fabric stretched between both feed rollers of the roller traverser by the rotational force of the tension roller. This tension presses each intermediate roller or the outer periphery of each feed roller and tension roller.

The force of this pressing is independent of the rigidity of the intermediate roller.
It becomes almost uniform in the axial direction. In this way, by pressing each intermediate roller against its corresponding feed roller and tension roller, the base fabric is also kept strongly pressed against the outer periphery of these rollers, and the contact between each feed roller and the base fabric is maintained. The slippage between them is eliminated.

〔Example〕

Next, one embodiment of the present invention will be described with reference to FIGS. 1 to 6. The following examples are roller traverse type multi-head,
This invention is applied to a multi-needle embroidery machine.

First, Fig. 4 shows a side view of the embroidery machine in a state of embroidery work on a rolled base fabric, Fig. 5 shows a front view of the embroidery machine as seen from the left side of Fig. 4, and Fig. 6 shows a front view of the embroidery machine as seen from the left side of Fig. 4. The figure also shows a plan view of the embroidery machine.

First, as is clear from FIG. 4, on the right side of the drawing of the embroidery machine 20, a supply unit 12 for the base fabric roll Ko is arranged, and on the left side of the drawing, the base fabric K after being sewn is wound into a roll and collected. A collection section I4 is arranged for this purpose. That is, supply part I
2, the base fabric roll K is placed on the rollers 13 arranged at an angle of 211 degrees. The embroidery machine 20 is listed here.
The base fabric K is rolled out one after another. and embroidery machine 20
After the embroidery is done, there is a step stool 16 for the worker.
is guided to the collection section 14 through the bottom of the collection section 14.
It is sequentially wound up into a roll on rollers 15 arranged in two rows and collected.

Regarding the embroidery machine 20, as is clear from FIGS. 5 and 6, a head frame 26 is provided above the bed 22. A plurality of sewing machine heads 28 are arranged on this head frame 26 along the left-right direction in FIG. Further, hook bases 23 are arranged at lower positions corresponding to these sewing machine heads 28.

A pair of rails 24 are provided on both left and right sides of the upper surface of the bed 22 in FIGS. 5 and 6, respectively. Roller traversers 30 are mounted on these rails 24.
It is assembled so as to be movable along each rail 24 in the X direction (width direction of the base fabric) shown in FIGS. 5 and 6. This roller traverser 30 includes roller frames 32 and 33 arranged on both left and right sides of FIGS. 5 and 6.
has. The roller frames 32 and 33 are connected to each other by tie rods 34 on the sides facing the supply section 12 and the recovery section 14, respectively.

A ball nut (not shown) is fixed to the roller frame 33, and a ball screw 36 rotatably supported by a part of the bed 22 is screwed into the ball nut (not shown).

The ball screw 36 rotates about its axis in response to a rotational force from a reversible motor 38 shown in FIG. That is, by the forward and reverse rotation of the ball screw 36, the roller traverser 30 moves against the rail 24 on the bed 22.
The base cloth K is reciprocated along the X direction, thereby controlling the movement of the base cloth K in the X direction.

Further, between the roller frames 32 and 33, feed rollers 40 are rotatably provided on both sides of the sewing machine head 28. Further, a reversible motor 42 assembled to the roller frame 33 on the right side in FIGS. 5 and 6 causes the pair of feed rollers 40 to rotate forward and reverse in synchronization in the same direction. That is, the reversible motor 42 rotates both feed rollers 40 in forward and reverse directions, thereby controlling the movement of the base fabric K in the Y direction. In addition, on the outer side adjacent to each feed roller 40, there is a tension roller 50.
are placed respectively.

FIG. 2 shows the configuration of the roller traverser 30 in an enlarged sectional view taken along the line A-A in FIG. 6, and FIG. has been done. As is clear from these drawings, both ends of the roller shaft 41 of each of the feed rollers 40 are rotatably supported by bearings 48 on the roller frames 32 and 33 (see especially FIG. 3). Further, both ends of the roller shaft 51 of each tension roller 50 are rotatably supported by bearings 59 on support plates P attached to the front and rear positions (left and right positions in FIG. 2) of both roller frames 32 and 33. ing.

An air motor 54 is attached to each support plate P of one roller frame 32, respectively.

A driving gear 58 fixed to the motor shaft 56 of both air motors 54 is connected to a large-diameter driven gear 52 fixed to the roller shaft 51 at the end of each tension roller 50.
are interlocked with each other.

By these air motors 54, each tension roller 5
0, rotational forces in opposite directions (directions of arrows in FIG. 2) are applied.

Note that each of the above-mentioned support plates P has a roller frame 32.
33 so as to be slidable in the front-rear direction (for example, the left-right direction in FIG. 2), and can be slid by an actuator such as an air cylinder (not shown). As a result, when setting on the base fabric, the support plate P can be slid to widen the distance between the feed roller 40 and the tension roller 50, making it easy to set on the base fabric.

Now, in each of the aforementioned feed rollers 40, an end of a support arm 44 is mounted on the roller shaft 4I on the outer side of both ends thereof so as to be rotatable about the axis of the roller shaft 41, respectively. In its free state, each support arm 44 is connected to each roller shaft 44 as shown by imaginary lines in FIG.
1 and extends directly below, each tip (lower end)
A vertically long shaft support hole 46 is formed in the shaft support hole 46 .

Both ends of a roller shaft 62 of an intermediate roller 60 are rotatably supported in the shaft support holes 46 of the support arms 44 facing each other on the left and right sides of FIG. In other words, the intermediate roller 60 is disposed below each feed roller 40 on the left and right sides of FIG. 2, as shown by imaginary lines. When tension in the base fabric acts on the rain intermediate roller 60 as described later, the corresponding rotation of each support arm 44 around the roller shaft 41 and the pivot holes 4 of these support arms 44 occur.
6, each intermediate roller 60 can be moved to a position where it contacts the respective outer peripheries of the feed roller 40 and the tension roller 50, as shown by solid lines in FIG. be.

FIG. 1 shows a schematic enlarged view of the left-hand portion of FIG. As clearly illustrated in FIG. The tension roller 50 is wound and reversed.
guided by the outer periphery of The base fabric pulled out from the tension roller 50 is wound around the outer periphery of the tie rod 34, and then guided to the supply section 12 or the recovery section 14 shown in FIG. 4, respectively.

In the embroidery machine having the above configuration, as described above, rotational forces in opposite directions are applied to each tension roller 50 by the air motor 54.

As a result, the base fabric K stretched across both feed rollers 40
is always given a constant tension in the X direction. Due to this tension, each intermediate roller 60 is pressed against the outer periphery of the respective feed roller 40 and tension roller 50 as described above. Note that the force of this pressing is substantially uniform in the axial direction, regardless of the rigidity of the intermediate roller 60. And each intermediate roller 60 or the corresponding feed roller 40 and tension roller 5
These rollers 40,
The base fabric K is kept strongly pressed against the outer periphery of the base fabric K, for example, at locations a and b in FIG.

Now, roller frame 3 in roller traverser 30
When the roller traverser 3 is rotated in forward and reverse directions by the ball screw 36 screwed into the pole nut of 3 or driven by the reversible motor 38 based on a control signal for embroidery, the roller traverser 3
0 moves along the rail 24 of the bed 22, and the movement of the base fabric K in the X direction is controlled. Also, each feed roller 40 or the reversible motor 4 which is also based on a control signal for embroidery.
When both are driven in the same direction in synchronized forward and reverse rotations, the base fabric is controlled to move in the X direction between both feed rollers 40. In this way, by controlling the movement of the base cloth K in the X direction and the X direction with respect to the needle head of the sewing machine head 28,
A predetermined embroidery pattern is sewn onto the base cloth K.

When controlling the movement of the base fabric, as described above, the base fabric K is strongly pressed against the outer circumferences of the feed roller 40 and the tension roller 50, so the rotation of the feed roller 40, especially in the rotational direction. The occurrence of slippage between each feed roller 40 and the base fabric during conversion is eliminated.

〔Effect of the invention〕

In this way, the present invention can hold the base fabric firmly pressed against the outer periphery of the feed roller and tension roller of the roller traverser, thereby suppressing slippage between each feed roller and the base fabric and preventing pattern misalignment in embroidery. It is possible to resolve this.

[Brief explanation of drawings]

1 to 6 show embodiments of the present invention, FIG. 1 is an enlarged schematic diagram of a part of the roller traverser, and FIG. 2 is an enlarged sectional view taken along the line A-A in FIG. 6. , Figure 3 is an enlarged sectional view taken along the line B-B in Figure 6, Figure 4 is a side view of the embroidery machine in the embroidery work state, and Figure 5 is a front view of the embroidery machine seen from the left side of Figure 4. FIG. 6 is a plan view of the embroidery machine. FIG. 7 is a schematic diagram showing a part of a conventional roller traverser in correspondence with FIG. 1. 20...Embroidery machine 28...Sewing machine head 30...Roller traverser 40...Feed roller 50...Tension roller 60...Intermediate roller K...Base fabric Applicant Tokai Kogyo Sewing Machine Co., Ltd. Agent Person Patent Attorney Oka 1) Hidehiko (3 others) Rat traverser...Feed roller 50...Tension roller...Base fabric diagram

Claims (1)

[Claims] A roller traverser is disposed below the sewing machine head so as to be able to reciprocate, and this roller traverser has a pair of feed rollers arranged at a predetermined interval in a direction perpendicular to the reciprocating direction of the roller traverser, both in the same direction. The roller traverser is provided to be able to rotate forward and backward in synchronization with the feed rollers, and with a long base fabric drawn out from a predetermined base fabric roll being stretched between these feed rollers, the base fabric is moved back and forth by a roller traverser. In a roller traverse type embroidery machine that moves the base fabric in the X direction and rotates both feed rollers in forward and reverse directions to move the base fabric in the Y direction, thereby applying continuous embroidery to the base fabric, each of the feed rollers is a pair of tension rollers that are arranged adjacent to each other and receive rotational forces in opposite directions to apply tension in the Y direction to the base fabric stretched between both feed rollers; The intermediate roller is arranged between the rollers and can freely move towards and away from both of the rollers, and the base fabric stretched between the two feed rollers is passed from the outer periphery of each feed roller to the intermediate roller. A roller traverse type embroidery machine characterized in that the roller traverse type embroidery machine is configured to guide the tension roller to the outer circumference of the tension roller, wrap the tension roller around the outer circumference of the tension roller, invert the tension roller, and then guide the tension roller to the outer circumference of the tension roller.