A jacquard upper plate needle selection and resetting device and method

Abstract

The present invention relates to the technical field of jacquard machines, and in particular to a device and method for resetting needles on a jacquard upper disc. The device comprises an upper needle disc, a needle selector, a weaving cam, a first resetting cam, and a second resetting cam. The upper needle disc is provided with a plurality of jacquard needles arranged radially along the upper needle disc. The first resetting cam comprises a first inclined surface, which is tilted downward in the opposite direction of the rotation direction of the upper needle disc, so that the jacquard needle is guided and lifted to an upper needle position through the first inclined surface; the second resetting cam comprises a second inclined surface, which is tilted downward radially outward toward the upper needle disc, and the second resetting cam is correspondingly arranged at a position where the jacquard needle performs a needle-closing action. If the jacquard needle performs a needle-closing action and moves downward, it can be guided and lifted back to an upper needle position through the second inclined surface; the second resetting cam can lift and reset the jacquard needle that moves downward, and the extension design of the outer wall of the middle core limits the radial movement of the jacquard needle to avoid the problem of needle collision, thereby realizing an increase in production speed.

Description

Technical Field

[0001] The invention relates to the technical field of jacquard machines, and in particular to a jacquard machine upper plate needle selection and resetting device and method. Background Art

[0002] The production speed of the jacquard machine is largely determined by the rotation speed of the upper needle disc. However, if the rotation speed of the upper needle disc is greatly increased, the jacquard needles may move uncontrollably during operation. When the movement amount is greater than the critical value, the needle collision problem will occur, causing damage to the equipment. Therefore, the existing structure restricts the production speed of the jacquard machine. Summary of the invention

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a jacquard upper plate needle selection and resetting device and method capable of high-speed production.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows: a jacquard upper plate needle selection and resetting device, comprising:

[0005] An upper needle disc, on which a plurality of jacquard needles are arranged radially along the upper needle disc, and the upper needle disc can rotate around its axis;

[0006] The needle selector is fixedly set, and the jacquard needle can be kept in the upper needle position or pressed down to the lower needle position through the needle selector;

[0007] The knitting cam is fixedly arranged, and the jacquard needle at the upper needle position passes through the knitting cam to perform a needle-out action that can extend outward relative to the axis of the upper needle disk, or a needle-retracting action that can retract inward;

[0008] It is characterized by: also including:

[0009] The first reset cam is fixedly arranged and comprises a first inclined surface, wherein the first inclined surface is inclined downward in the opposite direction to the rotation direction of the upper needle disc, so that the jacquard needle is guided by the first inclined surface and lifted to the upper needle position;

[0010] The second reset cam is fixedly arranged and includes a second inclined surface, which is inclined downward radially outwardly toward the upper needle disc. The second reset cam is correspondingly arranged at the position where the jacquard needle performs a needle closing action. If the jacquard needle performs a needle closing action and moves downward, it can be guided by the second inclined surface to be lifted back to the upper needle position;

[0011] The upper needle disc rotates to drive the jacquard needle to pass through the needle selector, the first reset cam, and the second reset cam in sequence.

[0012] Furthermore, the jacquard needle can be in a flat needle position and a knock-off position under the drive of the knitting cam, and the knock-off position is further retracted inwardly relative to the flat needle position; it also includes a middle core, which is fixedly arranged, coaxially arranged with the upper needle disk, and an outer wall surface of the middle core extends to the end of the jacquard needle close to the flat needle position, and an inwardly recessed default portion is also provided on the outer wall surface of the middle core, and the default portion is correspondingly arranged at the position where the knitting cam drives the jacquard needle to enter the knock-off position, so as to form a makeshift space for the jacquard needle to be in the knock-off position.

[0013] Furthermore, the second reset cam is arranged corresponding to the position where the knitting cam drives the jacquard needle to enter the loop knocking position.

[0014] A method for resetting needle selection on a jacquard machine upper plate is characterized in that: each jacquard needle at a lower needle position passes through a first resetting cam and is guided by a first inclined surface to be lifted to an upper needle position; subsequently, each jacquard needle at an upper needle position performs a needle-reducing action to a loop-dropping position under the action of a knitting cam, and if the jacquard needle moves downward during the needle-reducing action, it is guided by a second inclined surface of a second resetting cam to be lifted back to the upper needle position.

[0015] Furthermore, the outer wall surface of the center core extends to the end of the jacquard needle close to the flat needle position, thereby limiting the radial inward movement of the jacquard needle in the flat needle position to avoid the jacquard needle from colliding with the needle selector and the knitting triangle; a default portion recessed inwardly is provided at a corresponding position on the outer wall surface of the center core, and the default portion provides a clearance space for the jacquard needle in the unlooping position to overcome the unlooping blocking problem caused by the extension of the outer wall surface of the center core.

[0016] From the above description of the present invention, it can be seen that compared with the prior art, the present invention provides a jacquard upper disk needle selection and resetting device and method, the second resetting triangle can lift and reset the jacquard needle that is moving downward, to ensure the accuracy of the position of the jacquard needle after resetting, and the extension design of the outer wall of the center core limits the radial movement of the jacquard needle to avoid the problem of needle collision; therefore, the jacquard needle is controlled during the entire operation process, which provides an equipment basis for further increasing the rotation speed of the upper needle disk, thereby achieving an increase in production speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure of the needle selection and resetting device of the upper plate of a jacquard machine according to the present invention is shown in FIG. Figure 1 .

[0018] Figure 2 For the present invention Figure 1 A partial enlarged schematic diagram.

[0019] Figure 3 The structure of the needle selection and resetting device of the upper plate of a jacquard machine according to the present invention is shown in FIG. Figure 2 .

[0020] Figure 4This is the front view of the first reset triangle of the present invention.

[0021] Figure 5 It is a side view of the first reset triangle of the present invention.

[0022] Figure 6 This is a top view of the first reset triangle of the present invention.

[0023] Figure 7 This is the front view of the second reset triangle of the present invention.

[0024] Figure 8 This is a top view of the second reset triangle of the present invention.

[0025] The symbols in the figure correspond as follows: 1 upper needle plate, 2 jacquard needle, 3 needle selector, 4 weaving cam, 5 first reset cam, 51 first inclined surface, 6 second reset cam, 61 second inclined surface, 7 center core, 71 outer wall surface, 72 default part. DETAILED DESCRIPTION

[0026] The present invention is further described below through specific implementation modes.

[0027] Reference Figures 1 to 8 As shown, a jacquard upper plate needle selection and resetting device comprises:

[0028] An upper needle disk 1 is provided with a plurality of jacquard needles 2 arranged radially along the upper needle disk 1, and the upper needle disk 1 can rotate around its axis;

[0029] The needle selector 3 is fixedly arranged, and the jacquard needle 2 can be kept in the upper needle position or pressed down to the lower needle position through the needle selector 3;

[0030] The knitting cam 4 is fixedly arranged, and the jacquard needle 2 at the upper needle position passes through the knitting cam 4 to perform a needle-out action that can extend outward relative to the axis of the upper needle disk 1, or a needle-retracting action that can retract inward;

[0031] The first reset cam 5 is fixedly arranged and comprises a first inclined surface 51, which is inclined downward in the opposite direction to the rotation direction of the upper needle plate 1, so that the jacquard needle 2 is guided by the first inclined surface 51 and lifted to the upper needle position;

[0032] The second reset cam 6 is fixedly arranged, and includes a second inclined surface 61, which is inclined downward radially outwardly toward the upper needle plate 1. The second reset cam 6 is correspondingly arranged at the position where the jacquard needle 2 performs a needle closing action. If the jacquard needle 2 performs a needle closing action and moves downward, it can be guided by the second inclined surface 61 to be lifted back to the upper needle position;

[0033] The upper needle disc 1 rotates to drive the jacquard needle 2 to pass through the needle selector 3, the first reset cam 5, and the second reset cam 6 in sequence.

[0034] The jacquard needle 2 can be in the flat needle position and the knock-off position under the drive of the knitting cam 4, and the knock-off position is further retracted inwardly relative to the flat needle position; the jacquard needle 2 also includes a center core 7, which is fixedly arranged and coaxially arranged with the upper needle disk 1. The outer wall surface 71 of the center core 7 extends to the end of the jacquard needle 2 close to the flat needle position. The outer wall surface 71 of the center core 7 is also provided with a default portion 72 recessed inwardly. The default portion 72 is correspondingly arranged at the position where the knitting cam 4 drives the jacquard needle 2 to enter the knock-off position, so as to form a clearance space for the jacquard needle 2 to be in the knock-off position.

[0035] The second reset cam 6 is arranged corresponding to the position where the knitting cam 4 drives the jacquard needle 2 to enter the unlooping position.

[0036] A method for resetting the needle selection on the upper plate of a jacquard machine:

[0037] The upper needle disc 1 rotates to drive the jacquard needle 2 to rotate, and the jacquard needle 2 passes through the two needle selectors 3 in sequence. If the jacquard needle 3 maintains the upper needle position, it is in the working range of the knitting cam 4, and the knitting cam 4 guides the needle-out action or the needle-retracting action; if the jacquard needle 2 is pressed down to the lower needle position, it is not in the working range of the knitting cam 4, so the jacquard needle 2 is not guided to move in the radial direction by the knitting cam 4, but also because the support of the knitting cam 4 is lost, the jacquard needle 2 will move in the radial direction during the high-speed rotation of the upper needle disc 1. When the jacquard needle 2 is in the flat needle position and further moves inward and the amount of movement is too large, it will cause the jacquard needle 2 to collide with the needle selector 3 and the knitting cam 4. Therefore, the outer wall surface 71 of the middle core 7 is extended to the end of the jacquard needle 2 close to the flat needle position, so as to limit the radial inward movement of the jacquard needle 2 in the flat needle position, so as to avoid the jacquard needle 2 from colliding with the needle selector 3 and the knitting cam 4.

[0038] After completing the first stage of the jacquard process, the jacquard needles 2 need to be reset. Each jacquard needle 2 in the lower needle position passes through the first reset cam 5 and is guided by the first inclined surface 51 to be lifted to the upper needle position; then, the jacquard needle 2 originally in the upper needle position 1 and the jacquard needle 2 guided to the upper needle position by the first reset cam 5 are both narrowed to the loop-off position under the action of the knitting cam 4. If the jacquard needle 2 moves downward during the narrowing action, it is guided and lifted back to the upper needle position by the second inclined surface 61 of the second reset cam 6.

[0039] The second reset cam 6 is arranged corresponding to the position where the knitting cam 4 drives the jacquard needle 2 to enter the unlooping position, and the corresponding position on the outer wall surface 71 of the center core is provided with a default portion 72 recessed inwardly, and the default portion 72 is arranged corresponding to the position where the knitting cam 4 drives the jacquard needle 2 to enter the unlooping position. The default portion 72 provides a make way space for the jacquard needle 2 in the unlooping position to overcome the unlooping blocking problem caused by the extension of the outer wall surface 71 of the center core 7.

[0040] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A jacquard upper plate needle selection and resetting device, comprising: An upper needle disc, on which a plurality of jacquard needles are arranged radially along the upper needle disc, and the upper needle disc can rotate around its axis; The needle selector is fixedly set, and the jacquard needle can be kept in the upper needle position or pressed down to the lower needle position through the needle selector; The knitting cam is fixedly arranged, and the jacquard needle at the upper needle position passes through the knitting cam to perform a needle-out action that can extend outward relative to the axis of the upper needle disk, or a needle-retracting action that can retract inward; It is characterized by: also including: The first reset cam is fixedly arranged and comprises a first inclined surface, wherein the first inclined surface is inclined downward in the opposite direction to the rotation direction of the upper needle disc, so that the jacquard needle is guided by the first inclined surface and lifted to the upper needle position; The second reset cam is fixedly arranged and includes a second inclined surface, which is inclined downward radially outwardly toward the upper needle disc. The second reset cam is correspondingly arranged at the position where the jacquard needle performs a needle closing action. If the jacquard needle performs a needle closing action and moves downward, it can be guided by the second inclined surface to be lifted back to the upper needle position; The upper needle disc rotates to drive the jacquard needle to pass through the needle selector, the first reset cam, and the second reset cam in sequence; The jacquard needle can be in a flat needle position and a knock-off position driven by the knitting cam, and the knock-off position is further contracted inwardly relative to the flat needle position; the jacquard needle also includes a middle core, which is fixedly arranged and coaxially arranged with the upper needle disc, and the outer wall surface of the middle core extends to the end of the jacquard needle close to the flat needle position, and an inwardly recessed default portion is also provided on the outer wall surface of the middle core, and the default portion is correspondingly arranged at the position where the knitting cam drives the jacquard needle to enter the knock-off position, so as to form a make way space for the jacquard needle to be in the knock-off position.

2. According to claim 1, a jacquard upper plate needle selection and resetting device is characterized in that: The second reset cam is arranged corresponding to the position where the knitting cam drives the jacquard needle to enter the loop knocking position.

3. A method for resetting the needle selection of the upper plate of a jacquard machine, characterized in that: Based on the needle selection and resetting device for the upper plate of a jacquard machine as described in any one of claims 1-2, each jacquard needle in the lower needle position passes through the first resetting cam and is guided and lifted to the upper needle position by the first inclined surface; then, each jacquard needle in the upper needle position performs a needle closing action to the loop undoing position under the action of the knitting cam, and if the jacquard needle moves downward during the needle closing action, it is guided and lifted back to the upper needle position by the second inclined surface of the second resetting cam.

4. According to claim 3, a method for resetting needle selection on the upper plate of a jacquard machine is characterized in that: The outer wall surface of the center core extends to the end of the jacquard needle close to the flat needle position, so that the radial inward movement of the jacquard needle in the flat needle position can be limited to avoid the jacquard needle from colliding with the needle selector and the knitting cam; a default portion recessed inwardly is provided at a corresponding position on the outer wall surface of the center core, and the default portion provides a clearance space for the jacquard needle in the unlooping position to overcome the unlooping blocking problem caused by the extension of the outer wall surface of the center core.

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