JPH0719364U - Card flat - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a flat in which the needle tip surface of the flat needle group is a flat shape, which improves the carding effect and reduces damage to the flat needle. A dimensional difference h between the toe 22 and heel 23 of the flat 7 guided by the guide surface 5a of the flexible bend is
A point A at which the gap between the needle tip surface 21a of the flat needle group 21 and the tip of the cylinder wire 3 is the minimum is a position rearward in the cylinder rotation direction from the group end of the flat needle group 21 located forward in the cylinder rotation direction. Was set.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present application relates to a flat card having a flat needle group on the bottom surface and performing a carding action with a cylinder wire on the outer circumference of a rotating cylinder.

[0002]

[Prior art]

 As shown in FIG. 4, a needle tip surface 21a of a flat needle group 21 of a conventional card is generally formed into a flat surface, and when performing a carding action, the flat needle tip surface 21a of the flat needle group 21 and the cylinder wire 3 Toe 22 and heel 23 so that the point (minimum gauge portion) A where the gap between the tip and the imaginary circle 3a drawn is the minimum a is located at the front end of the flat needle group 21 in the cylinder rotation direction. The dimensional difference H of the sliding contact surface with respect to the guide surface 5a of the flexible bend is set. However, in the flat 7 as described above, the effective number of needles B in the front portion in the cylinder rotation direction becomes a gap where the tip of the cylinder wire 3 and the needle tip surface 21a of the flat needle group 21 become a particularly effective carding action. The fact is that the carding effect is low and effective carding is not performed. Further, since the minimum gauge portion A is located at the end portion of the flat needle group 21 in the cylinder rotation direction, the load on the needle at that portion during the carding action is large and the flat needle is damaged. There was a problem.

[0003]

[Problems to be solved by the device]

 In order to solve the above problem, there is one disclosed in Japanese Utility Model Publication No. 45-2500 by the applicant of the present invention, which is a flat needle group in which the needle tip surface is formed into an arcuate surface and is flat when performing a carding action. It is formed so that the point where the gap between the flat needle tip surface of the needle group and the tip of the cylinder wire is the minimum is the position behind the group end of the flat needle group located in the front in the cylinder rotation direction and in the cylinder rotation direction. Therefore, the effective number of needles in the front part of the cylinder rotation direction, where the tip of the cylinder wire and the needle tip surface of the flat needle group are close to each other, increases the carding effect and reduces damage to the flat needle group. effective.

However, such flats are usually used for a card as an assembly of a large number of flats, and it is very difficult to form the flat needle tips of all the flats in the same circular arc surface, and at present, the above Such a flat needle having a flat needle tip formed on an arc surface has not been used. From the above, it is an object of the present application to provide a flat needle in which the shape of the tip of the flat needle is flat and the carding effect is improved and damage to the flat needle is minimized.

[0005]

[Means for Solving the Problems]

 In order to provide the flat, in the present application, there is a flat needle group on the bottom surface, and a carding action is performed between the cylinder wire on the outer circumference of the cylinder that runs along the outer circumference of the cylinder guided by the flexible bend above the cylinder. In the flat of the card to perform the above, the flat needle tip surface is formed into a flat surface, and the point where the gap between this flat needle tip surface and the tip of the cylinder wire is the minimum is forward from the center of the flat needle group in the cylinder rotation direction. The dimensional difference between the toe and the heel guided by the flexible bend is set so that the flat needle group is located rearward in the cylinder rotation direction from the front end in the cylinder rotation direction.

[0006]

[Action]

 The effective number of needles in the front portion of the cylinder rotation direction, where the tip of the cylinder wire and the needle tip surface of the flat needle group are close to each other, is increased before and after the minimum gauge portion, and the carding effect is improved. Further, the load on the front portion of the flat needle group in the cylinder rotation direction is reduced, and damage to the flat needles is reduced.

[0007]

【Example】

 In FIG. 1, a cylinder wire 3 rotatably supported by a machine base 1 has a cylinder wire 3 (shown in FIG. 2) wound around the outer peripheral surface thereof. Cylinder bends 4 are fixed to the machine base 1 on both sides of the cylinder 2 in the rotation axis direction (machine width direction), and the cylinder bends 4 are radially adjusted by an adjusting mechanism (not shown). A flexible semi-circular bend 5 is fixed. A large number of flats 7, which will be described later, are connected via a chain 8 to form a flat group 9, and the flat group 9 is supported by a plurality of sprockets 11 so as to be rotatable along the outer peripheral surface of the cylinder. Both ends of the flat 7 in the cylinder rotation axis direction, which are close to the outer peripheral surface of the cylinder in the flat group 9, are slidably guided by the guide surface 5a on the upper surface of the flexible bend 5.

Next, the flat 7 will be described with reference to FIG. The flat 7 is attached to the bottom surface of the flat bar 20 and a flat bar 20 extending over the entire length in the direction of the cylinder rotation axis, and a flat needle group for combing fibers between the cylinder wire 3 of the cylinder 2. 21. The needle tip surface 21a of the flat needle group 21 is formed in a flat shape. A toe 22 and a heel 23 guided by the inner surface 5 a of the flexible bend 5 are formed at both ends of the flat bar 20 in the cylinder rotation axis direction. The dimensional difference h between the toe 22 and the heel 23 is that the gap between the flat needle tip surface of the flat needle group 21 and the virtual circle 3a drawn by the tip of the cylinder wire becomes a minimum when performing carding action. The (minimum gauge portion) A is set so as to be located in the cylinder rotation direction position from the center of the flat needle group 21 and in the cylinder rotation direction rear position from the cylinder rotation direction front end of the flat needle group 21.

In the flat 7 configured as described above, the number of effective needles b in the cylinder rotation direction between the needle tip surface 21a of the flat needle group 21 and the tip of the cylinder wire is the same as the conventional effective number of needles B (see FIG. 4). Compared to the above (1), the cardboard effect is present before and after the minimum gauge section A, and the carding effect is improved. Further, since the load on the front end portion of the flat needle group 21 in the cylinder rotation direction is reduced, it is possible to reduce the damage to the flat needle at that portion. In the flat 7 shown in FIG. 2, the opening amount d behind the cylinder rotation direction is smaller than the conventional opening amount D (shown in FIG. 4), but if the opening amount is insufficient in this way, As shown in FIG. 3, if the length in the cylinder rotation direction of the flat bar 20 and the flat needle group 21 provided on the bottom surface of the flat bar 20 is set to a large value, a sufficient opening amount e can be obtained as compared with the conventional case.

[0010]

[Effect of device]

 As described above, according to the present invention, the flat needle group is provided on the bottom surface, and the card is acted on by the flexible bend above the cylinder to run along the outer circumference of the cylinder and to have a carding action with the rotating cylinder wire on the outer circumference of the cylinder. In the flat of the card to be performed, the above-mentioned flat needle tip surface is formed into a flat surface, and the point where the gap between this flat needle tip surface and the tip of the cylinder wire is the minimum is forward of the center of the flat needle group in the cylinder rotation direction. Since the toe and heel size differences guided by the flexible bend are set so that the flat needle group is located rearward in the cylinder rotational direction from the cylinder rotational direction front end, the needle tip of the flat needle group is simple. It is a flat shape that can be formed into a flat shape, and can provide a flat that improves the carding effect and reduces damage to the flat needle.

[Brief description of drawings]

FIG. 1 is an overall view of a card.

FIG. 2 is a front view of a flat of this embodiment.

FIG. 3 is a front view of a flat of another embodiment.

FIG. 4 is a front view of a conventional flat.

[Explanation of symbols]

2 cylinders, 3 cylinder wires, 5a guide surface for cylinder bend, 7 flats, 22 toe, 2
3 heels

Claims (1)

[Scope of utility model registration request] 1. A flat card which has a group of flat needles on its bottom surface, runs along the outer circumference of the cylinder guided by a flexible bend above the cylinder, and performs a carding action with a rotating cylinder wire on the outer circumference of the cylinder. In the above, the flat needle tip surface is formed into a flat surface, and the point where the gap between the flat needle tip surface and the tip of the cylinder wire is the minimum is the front of the center of the flat needle group in the cylinder rotation direction. The flat of the card, wherein the dimensional difference between the toe and heel guided by the flexible bend is set so that the flat needle group is located at the rear position in the cylinder rotation direction from the front end in the cylinder rotation direction.