WO2010010681A1

WO2010010681A1 - Cam for driving knitting needle and weft knitting machine

Info

Publication number: WO2010010681A1
Application number: PCT/JP2009/003391
Authority: WO
Inventors: 有北礼治
Original assignee: 株式会社島精機製作所
Priority date: 2008-07-23
Filing date: 2009-07-18
Publication date: 2010-01-28
Also published as: CN102105628B; EP2336410B1; CN102105628A; EP2336410A1; EP2336410A4; JP5414674B2; JPWO2010010681A1

Abstract

Provided is a cam for driving a knitting needle which can prevent seizure of the knitting needle to a butt, and also provided is a weft knitting machine. A cam member (40) for driving a knitting needle is mounted on a substantially planar carriage reciprocating along the surface of a needle bed (15). A grooved cam (41), having a cam wall face (43) which abuts on and guides a butt (48) projecting from a knitting member (46) contained in the needle groove (18) of the needle bed (15), to the outside of the needle grove (18), is formed in the cam member (40) to face the surface of the needle bed (15). The grooved cam (41) is provided with a chamfer (45), and the edge of the cam wall face (43) on the side of the cam surface (42) is removed. A butt (47) projects from the surface of the needle bed (15) by 2 mm or more. A clearance (S) of 0.2 mm is provided between the surface of the needle bed (15) and the cam surface (42). The edge is removed by the chamfer (45) over a range of 0.2-0.4 mm in the thickness direction from the cam surface of the grooved cam (41).

Description

Knitting needle driving cam and flat knitting machine

The present invention relates to a knitting needle driving cam and a flat knitting machine that are mounted on a carriage that runs along a needle bed and that guides and drives a knitting needle butt protruding from a needle groove of the needle bed.

Conventionally, in a flat knitting machine, a knitting needle is accommodated in a needle groove arranged in parallel to a needle bed, and a hook on the tip side of the knitting needle is advanced and retracted to a mouth formed on the end side of the needle bed to knit the knitted fabric. Is going. The driving for moving the knitting needle back and forth is performed by mounting a knitting needle driving cam on the base plate on the bottom side of the carriage that reciprocates in the direction in which the needle grooves are arranged side by side. The knitting needle driving cam is generally plate-shaped, and the surface formed so as to be cut substantially perpendicularly from the surface facing the needle bed when mounted on the carriage is the cam surface. The cam surface is driven in contact with a bat protruding from the knitting needle toward the carriage. FIG. 2 is a cam layout showing the layout of cams for driving a knitting needle on a base plate of a carriage, and the cam surface is displayed as a contour line including a section inclined with respect to the traveling direction of the carriage (Patent Document 1 and Patent Document 2). reference).

FIG. 6 is a simplified diagram of FIG. 5 of Patent Document 1 and shows an example of the knitting needle 1 as being accommodated in the needle bed. The knitting needle 1 is a latch needle, and a hook 3 at the tip of the needle body 2 is opened and closed by a latch 4. A needle jack 5 is connected to the tail end side of the needle body 2. A transfer piece 6 is attached to one side surface of the needle body 2. The needle jack 5 is provided with a knitting operation bat 7 near the middle of the whole, and a transfer operation bat 8 is provided near the tip. The needle jack 5 has an elastic leg between the knitting operation bat 7 and the tail end, and the selection jack 9 is pressed by the tip where the selection bat 10 is provided near the middle of the elastic leg. The tip of the selector 11 abuts behind the selection bat 10 and can be pushed rightward in the drawing. The selector 11 has a lowering bat 12 that is lowered to the left and a raising bat 13 that is raised to the right, and has a needle selection bat 14 in the middle. One of the plurality of positions of the needle selection bat 14 is assigned to each knitting needle 1.

The knitting needle 1 is supported on the needle bed 15 side by combining a needle body 2, a needle jack 5, a select jack 9 and a selector 11. In the needle bed 15, needle plates 17 are erected on the substrate 16 at a constant pitch, and the knitting needles 1 are accommodated in the needle grooves 18 formed between the needle plates 17. The hook 3 on the distal end side of the knitting needle 1 moves forward and backward in the tooth opening 19 by the sliding displacement in the lateral direction in the drawing in the needle groove 18 and draws the knitting yarn supplied from the tooth opening 19 toward the needle bed 15 side. Form stitches. In a flat knitting machine having a pair of needle beds 15 on both sides before and after the tooth opening 19, various knitted fabrics are knitted using one or both needle beds 15, and stitches are moved between the needle beds 15. Transfers are also possible.

Note that each needle bed 15 is inclined such that the side of the tooth opening 19 is high and the side away from the tooth opening 19 is low, but for convenience of explanation, only one needle bed 15 is displayed in a horizontal posture. Further, the moving direction of the knitting needle 1 is described with the right direction in the drawing toward the tooth opening 19 ascending, the left direction in the drawing away from the tooth opening 19 descending, and the vertical direction in the drawing as the direction of ups and downs. Furthermore, although the needle plate 17 has a configuration for providing a fixed or movable sinker or the like on the side of the mouth 19, the illustration is omitted.

FIG. 7 shows a schematic configuration of a cam system 20 that can drive the knitting needle 1 as shown in FIG. 6 to perform a knitting operation or a transfer operation. For example, two sets of cam systems 20 are mounted on a carriage that reciprocates in a direction perpendicular to the paper surface along the needle bed 15 of FIG. Each set of cam systems 20 includes a transfer-use transfer cam 21, a fixed needle raising cam 22, a movable needle raising cam 23, a stitch cam 24, a transfer guide cam 25, a needle guide cam 26, a lowering selector guide cam 27, A raising selector guide cam 28 and a selector raising cam 29 are included. These cams are arranged on the base plate 30 of the carriage. As for one of the transfer transfer cam 21 and the movable needle raising cam 23, when the one protrudes from the surface of the main plate 30, the projecting state is alternately switched so that the other is set in the main plate 30.

The cam system 20 disposed on the main plate 30 also includes a needle selection operation unit 31 such as a needle selection actuator. The needle selection operation unit 31 operates on the needle selection bat 14 of the selector 11 of FIG. The needle selection operation is also related to the action of the lowering selector guide cam 27 on the lowering butt 12 of the selector 11 and the action of the raising selector guide cam 28 and the selector raising cam 29 on the raising butt 13. In the needle selection operation, the path of the selection bat 10 of the select jack 9 is switched. A presser 32 is disposed in the path of the selection bat 10.

Patent Document 2 discloses a flat knitting machine using a knitting needle as a knitting needle, which is not a latch needle but a compound needle that opens and closes a hook with a slider that slides against a needle body. In the knitting needle of the flat knitting machine, the knitting operation bat 7 and the transfer operation bat 8 provided in the needle jack 5 connected to the needle body 2 are guided by the cam regardless of the type of the latch needle or the compound needle. Thus, the knitting needle advances and retreats to the tooth opening 19. When forming a stitch such as a knit, the knitting operation bat 7 is guided by the movable needle raising cam 23 through a groove cam 37 formed as a groove-like route sandwiched between the upper and lower sides of the cam surface. At the time of transfer, the transfer needle is guided so that the operation bat 8 passes through the groove cam 38 formed between the upper edge of the transfer transfer cam 21 and the lower edge of the transfer guide cam 25. The The

groove cams

37 and 38 for guiding a single bat are formed so that the groove width is slightly larger than the width of the knitting operation bat 7 and the transfer operation bat 8. In the receiving needle at the time of transfer, the upper edge 39a formed on the inner side of the fixed needle raising cam 22 serves as a cam surface to guide the bat 7 for knitting operation to be pushed up. The edge 39b serves as a cam surface and guides the transfer operation bat 8 to be pushed down. These cam surfaces are wall surfaces formed so as to be cut with a sharp edge in the thickness direction from the surface of the plate-like member, and are indicated by contour lines on the cam layout drawing. In the section where the guide path of the groove cam is inclined with respect to the traveling direction of the carriage, the lower cam surface is mainly guided when the bat is raised, and the upper cam surface is mainly guided when the bat is lowered. .

When the presser 32 presses the selection bat 10 from above in FIG. 6, the tip of the select jack 9 presses the needle jack 5 and sinks the knitting operation bat 7 in the needle groove 18. Therefore, even if the knitting operation bat 7 is guided by the groove cam 37, if the path is switched to the path where the presser 32 presses the selection bat 10, the knitting operation bat 7 is caused to escape from the groove cam 37 halfway, The operation can be switched from to tack.
International Publication No. 07/074944 Pamphlet (Figs. 1 and 6) Japanese Patent No. 2917146 (FIGS. 1 and 33)

The knitting operation bat 7 and the transfer operation bat 8 which are guided by the

groove cams

37 and 38 in FIG. 7 and the upper edge 39a inside the fixed needle raising cam 22 and the lower edge 39b of the transfer and transfer transfer cam 21 are as follows. Since it receives an action from the cam surface on one side, a force is applied in the direction of defeating the bat. Further, when the bat starts to rise or descend, the bats collide when coming into contact with the

groove cams

37, 38 and the cam surfaces of the upper edge 39a and the lower edge 39b. Even during these collisions, force is applied in the direction of defeating the bat. In order to increase productivity with a flat knitting machine, it is necessary to increase the speed of knitting. In particular, when knitting at high speed, the tip edge of the cam surface bites into the falling bat, which may cause seizure.

In order to prevent seizure, even if oil is supplied to the cam surface, if a plurality of bats pass, the oil on the cam surface may be cut out and burnt out. If the angle at which the cam surface is inclined with respect to the traveling direction of the carriage is reduced, it is considered that the force for defeating the bat is reduced and the occurrence of seizure can be suppressed. However, the cam and carriage are increased in size. When the carriage is enlarged, the travel stroke necessary for knitting a knitted fabric having the same knitting width increases, which is an obstacle to increase productivity.

An object of the present invention is to provide a knitting needle driving cam and a flat knitting machine capable of preventing seizure of a knitting needle to a bat with a simple configuration.

The present invention is used by being mounted on a base plate of a carriage that reciprocates along a needle bed of a flat knitting machine, is generally plate-shaped, and is formed so as to be cut in a thickness direction from a plate-shaped surface. On the cam surface, a knitting needle driving cam that is driven in contact with a bat protruding from a knitting needle accommodated in the needle groove of the needle bed,
In the section where the cam surface is inclined with respect to the traveling direction of the carriage and the knitting needle is driven to move forward and backward, the edge of the corner of the cross section is the part where the plate-shaped surface transitions to the cam surface. A cam for driving a knitting needle including a section that has been removed.

Further, in the present invention, the butt that contacts the cam surface protrudes from the upper edge of the needle groove by 2 mm or more,
When mounted on the carriage, a 0.2 mm gap is provided between the plate-shaped surface and the upper edge of the needle groove,
The range where the edge is removed is 0.2 to 0.4 mm from the plate-like surface.

Further, in the present invention, the edge is removed in a section where the angle at which the cam surface is inclined with respect to the traveling direction of the carriage is at least 45 degrees or more.

Furthermore, the present invention is a flat knitting machine characterized in that any one of the aforementioned knitting needle driving cams is mounted on a carriage.

According to the present invention, the knitting needle driving cam is mounted on the base plate of the carriage that reciprocates along the surface of the needle bed. The cam for driving the knitting needle is formed such that a cam surface that contacts and drives a bat protruding from the knitting needle housed in the needle groove of the needle bed is cut from the plate-like surface in the thickness direction. The section where the cam surface is formed includes the section where the edge of the transition from the plate-shaped surface to the cam surface is removed, so even if the bat falls down during knitting at high speed, the tip of the cam surface Is difficult to bite. Moreover, it becomes easy to hold | maintain lubricating oil between a cam surface and a bat. As described above, the knitting needle driving cam of the flat knitting machine of the present invention can prevent seizure of the knitting needle to the bat with a simple configuration in which the edge of the cam surface is removed.

Further, according to the present invention, the bat that is guided in contact with the cam surface protrudes 2 mm or more from the upper edge of the needle groove, and is 0.2 mm between the upper edge of the needle groove and the surface of the knitting needle driving cam. The edge is removed in a range of 0.2 to 0.4 mm from the surface of the groove cam. The range where the edge is removed on the cam surface remains on the base side of the bat protruding from the upper edge of the needle groove, so that the cam surface that contacts the bat does not increase the moment of defeating the bat and ensure sufficient allowance. Can do.

Further, according to the present invention, the edge is removed in a section where the angle at which the cam surface is inclined with respect to the traveling direction of the carriage is at least 45 degrees or more. Can be prevented.

Furthermore, according to the present invention, it is possible to prevent seizure of the knitting needles on the bat even when the carriage runs at a high speed, so that the knitting productivity can be increased.

FIG. 1 is a simplified cross-sectional view showing a configuration of a main part of a cam member 40 according to an embodiment of the present invention. FIG. 2 is a partial cam arrangement diagram showing a configuration of a cam system 50 in which the concept of the cam member 40 of FIG. 1 is applied to the cam system 20 of FIG. FIG. 3 is a cross-sectional view schematically showing the effect of chamfering 45 on the cam surface 42 side of the cam wall surface 43 of the groove cam 41 with the cam member 40 of FIG. 4 is a cross-sectional view showing a configuration in which edge removal is performed at a portion where the cam wall surfaces 73 and 83 are cut from the cam surfaces 72 and 82 of the

other cam members

70 and 80 together with the chamfer 45 in the cam member 40 of FIG. FIG. FIG. 5 is a cross-sectional view showing the effect of preventing oil shortage by providing a chamfer 45 on the cam member 40 of FIG. 1 in comparison with a conventional cam member 60 without chamfering. FIG. 6 is a side view showing a configuration of a conventional knitting needle 1. FIG. 7 is a cam layout diagram showing a schematic configuration of a cam system 20 that can drive the knitting needle 1 of FIG. 6 to perform a knitting operation or a transfer operation.

DESCRIPTION OF SYMBOLS 1 Knitting needle 2 Needle body 5 Needle jack 7 Bat for knitting operation 8 Bat for transfer operation 15 Needle bed 17 Needle plate 18 Needle groove 19

Tooth mouth

40, 70, 80

Cam member

41, 57, 58 Groove cam 42 Cam surface 43 Cam Wall surface 45, 51a, 53a, 53b, 55a, 75, 85 Chamfer 46 Knitting member 47 Butt 50 Cam system 51 Transfer double-use transfer cam 51b, 51c, 52a, 57a, 57b, 58a, 58b Inclined section 52 Fixed needle raising cam 53 Movable needle raising cam 54 Stitch cam 55 Transfer guide cam 59a Upper edge 59b Lower edge

1 (a) and 1 (b) show a main part of a cam member 40 according to an embodiment of the present invention as a simplified cross-sectional configuration. In particular, FIG. 1 (a) shows a cross section viewed from the section line aa of FIG. 1 (b). In the following description, portions corresponding to the portions described in advance are denoted by the same reference numerals, and redundant description may be omitted.

The cam member 40 has a groove cam 41 in the same manner as the movable needle raising cam 23 used in the cam system 20 of FIG. The cam member 40 is generally plate-shaped, and is mounted on the base plate on the bottom surface side of the carriage of the flat knitting machine. The cam surface 42 of the cam member 40 faces the surface of the needle bed 15 with a gap S when mounted on the carriage. The gap S is, for example, 0.2 mm. The groove cam 41 has a cam wall surface 43 that is cut vertically from the cam surface 42 and formed in the thickness direction as a cam surface. When the groove cam 41 is formed on a single cam member, the groove cam 41 has a cam bottom surface 44. The groove cam 41 is not limited to that provided on the single cam member 40, and the groove cam 38 between the upper edge of the transfer transfer cam 21 and the lower edge of the transfer guide cam 25 in FIG. The cam may be such that the upper edge 39 a formed inside the fixed needle raising cam 22 and the lower edge 39 b of the transfer transfer cam 21 correspond to the cam wall surface 43. In this case, the main plate 30 corresponds to the cam bottom surface 44. In the grooved cam 41, the cam wall 42 side edge of the cam wall surface 43 is removed by providing an inclined surface chamfer 45 having an angle of 45 degrees, for example.

The removal of the edge by the chamfer 45 is performed in a range C that is 0.2 to 0.4 mm in the thickness direction as the cam member 40 from the cam surface 42 of the groove cam 41. The groove cam 41 guides a butt 47 of a knitting member 46 such as the needle jack 5 of FIG. The knitting member 46 protrudes from the upper edge of the needle groove 18 which becomes the surface of the needle bed 15 with a protrusion H while floating in the needle groove 18. The upper edge of the needle groove 18 is formed by the upper edge of the needle plate 17. The allowance H is about 2 to 3 mm. The range in which the edge is removed by the chamfering 45 on the cam wall surface 43 serving as the cam surface remains on the base side of the bat 47 protruding from the upper edge of the needle groove 18, so that the moment of the cam wall surface 43 contacting the bat 47 tilts the bat 47. A sufficient allowance can be secured without increasing the value.

In FIG. 1, the carriage travels in a direction perpendicular to the paper surface, and the cam member 40 mounted on the carriage also moves. In FIG. 1 (a), the cam wall surface 43 serving as the cam surface of the groove cam 41 is shown as being parallel and not inclined with respect to the traveling direction. That is, the cam wall surface 43 needs to be inclined with respect to the traveling direction in a portion that is driven to slide in a direction that advances and retreats with respect to the tooth opening. Even if the cam wall surface 43 shown in FIG. 1A is inclined with respect to the traveling direction, a chamfer 48 is also provided on the cross-sectional side of the bat 47 so that the bat 47 can be guided smoothly, and the inclined cam surface. The part which becomes an edge is removed.

FIG. 2 shows a configuration of a main part of a cam system 50 formed by applying the concept of the groove cam 41 in the cam member 40 of FIG. 1 to the cam system 20 of FIG. The cam system 50 includes a transfer transfer cam 51, a fixed needle raising cam 52, a movable needle raising cam 53, a stitch cam 54, a transfer guide cam 55, and a needle guide cam 56. Other configurations are the same as those in FIG. In the transfer transfer cam 51, the fixed needle raising cam 52, the movable needle raising cam 53, and the transfer guide cam 55, the

groove cams

37 and 38 shown in FIG. 7 and the groove cams corresponding to the upper edge 39a and the lower edge 39b, respectively. 57, 58, upper edge 59a, and lower edge 59b are formed with cam surfaces in the thickness direction perpendicular to the surface. Since the carriage on which the cam system 50 is mounted travels to the left and right in the figure, the inclined cam surfaces used to drive the bat when traveling in the left and right directions are arranged in line symmetry. The cam surface including the inclined section and continuing in line symmetry is removed by forming the chamfers 53a, 53b, 55a, 51a similar to the chamfer 45 in the same manner as the cam surface 42 side of the cam member 40 in FIG. Yes. Also, the entire upper edge 59a of the fixed needle raising cam 52 and the lower edge 59b of the transfer transfer cam 51 are chamfered as a whole.

The cam surfaces on both sides of the

groove cams

57 and 58 to which the chamfers 53a and 53b; 55a and 51a are applied are formed on the knitting operation bat 7 and the transfer operation bat 8 in accordance with the traveling direction of the carriage to the left and right in the drawing. It is necessary to switch the acting cam surface. Since the carriage is reciprocated, the cam surface in the inclined section is chamfered for both reciprocal use. For example, the upper cam surface of the groove cam 57 to which the chamfer 53a is provided includes an inclined section 57a that forms an angle of about 53 ° with respect to the traveling direction of the carriage. The lower cam surface of the groove cam 57 to which the chamfer 53b is applied also includes an inclined section 57b that forms an angle of about 53 ° with respect to the traveling direction. The upper and lower cam surfaces of the groove cam 58 to which the chamfers 55a and 51a are applied include inclined sections 58a and 58b that form an angle of about 53 ° with respect to the traveling direction, respectively. The upper edge 59a formed inside the fixed needle raising cam 52 also includes an inclined section 52a that forms an angle of about 50 ° with respect to the traveling direction. The lower edge 59b of the transfer-use transfer cam 51 that chamfers the entire surface includes inclined sections 51b and 51c that form angles of about 50 ° and about 45 ° with respect to the traveling direction. It is possible to prevent seizure by chamfering at least the inclined sections 57a, 57b, 58a, 58b, 52a, 51b, and 51c inclined at 45 ° or more with respect to the traveling direction. Even in the horizontal portion connecting these sections, continuous chamfering is performed for the convenience of processing. Further, a chamfer 54a similar to the chamfer 45 shown in FIG. 1 can be applied to the inclined cam surface where the knitting needle is retracted by the stitch cam 54, thereby preventing seizure.

When the knitting operation bat 7 is guided by the groove cam 57 of the movable needle raising cam 53 in a protruding state, a locus 7a is drawn between the cam surfaces to be chamfered 53a, 53b. Since the transfer-use transfer cam 51 is in a sunk state, the transfer operation bat 8 draws a locus 8a. Such an operation corresponds to knit, and the stitch cam 54 also guides the knitting operation bat 7. When the transfer operation bat 8 is guided by the groove cam 58 between the upper edge of the transfer-use transfer cam 51 in the protruding state and the lower edge of the transfer guide cam 55, the cam is chamfered 55a, 51a. A trajectory 8b is drawn between the surfaces. Since the movable needle raising cam 53 is in the submerged state, the knitting operation bat 7 draws a locus 7b. Such an operation corresponds to a transfer needle. The movement of the receiving needle is performed along the section that guides the knitting operation bat 7 with the upper edge 59 a formed inside the fixed needle raising cam 52 as a cam surface, and the lower edge 59 b of the transfer receiving and transferring cam 51. The knitting operation bat 7 and the transfer operation bat 8 bat are drawn so as to draw a trajectory 7c and a trajectory 8c, respectively, in combination with the section for guiding the transfer bat 8.

FIG. 3 schematically shows the effect of chamfering 45 on the cam surface 42 side of the cam wall surface 43 of the groove cam 41 with the cam member 40 of FIG. As shown on the left side, when the cam wall 43 contacts and guides the bat 47, the edge 45a of the contact portion has an obtuse angle greater than 90 degrees even if the butt 47 is slightly tilted and inclined. , Can be difficult to bite. As shown on the right side of the conventional cam member 60, the cam wall surface 63 formed by cutting from the cam surface 62 of the groove cam 61 has a sharp edge 65 whose boundary with the cam surface 62 forms an angle of about 90 degrees. It has become. The edge 65 is in a range sufficiently smaller than 0.2 mm even though it may be softened by polishing such as barrel finishing. In the cam member 40, by providing a chamfer 45 in a range of 0.2 mm or more, it is difficult to damage the bat 47 such as wrinkles. In addition, by setting the upper limit of the chamfer 45 to 0.4 mm, it is possible to prevent the position where the edge 45 a comes into contact with the bat 47 from being far from the surface of the needle bed 17. As a result, it is possible to prevent the moment for tilting the bat 47 from being increased, and it is possible to maintain an engagement margin that is a range that substantially acts on the bat 47 as a cam.

FIG. 4 shows the edge removal at the portion where the cam wall surfaces 73 and 83 are cut from the cam surfaces 72 and 82 of the

cam members

70 and 80 at the middle and the right side, similar to the chamfer 45 on the cam member 40 shown on the left side. The cross-sectional structure of the other chamfering which performs is shown. In the cam member 70, edge removal is performed by a curved chamfer 75. The curved chamfer 75 can be less likely to bite at the abutting edge than the inclined chamfer 45 in the cam member 40 of FIG. 3, for example. A chamfer 85 of the cam member 80 shown on the right side of FIG. 4 is formed in a stepped shape by combining an inclined chamfer 86 similar to the chamfer 45 of the cam member 40 and an intermediate groove 87. Since the chamfer 85 provided with such a groove 87 particularly increases the space for storing the lubricating oil, it is effective for preventing oil shortage described below.

FIG. 5 shows the effect of preventing oil shortage by providing the cam member 40 with the chamfer 45 in comparison with the conventional cam member 60 without the chamfer. The chamfers 75 and 85 of the

cam members

70 and 80 in FIG. 4 basically have the same effect, but in the following description, the chamfer 45 of the cam member 40 is representatively shown.

When the bat 47 is slidably guided to the surface on which the oil film 91 is formed by supplying lubricating oil to the cam surface from the oil supply device 90, which is simplified by an arrow, the oil film 91 is brought into contact with the butt 47. Will be temporarily removed. If the chamfer 45 is provided, a stagnant oil 92 is generated as a space for storing the lubricating oil, and at least a part of the oil film 91 removed from the stagnant oil 92 returns, so the oil film 91 is considered to be easily recovered. . On the other hand, in the cam member 60 without chamfering, when the oil film 91 is temporarily removed, the recovery of the oil film 91 proceeds only from the oil supply device 90 side. For this reason, recovery of the oil film 91 takes time, and when a plurality of bats 47 are continuously guided, there is a possibility that seizure to the bat 47 by the edge may occur. Further, when the butt 47 is inclined as shown in FIG. 3, even if the oil film 91 is temporarily removed by the sliding contact of the bat 47 near the edge 45 a of the cam member 40, the lubricating oil is present near the chamfer 45. The oil film 91 is likely to recover after the bat 47 passes.

As described above, the chamfer 45 is provided on the cam surface 42 side of the cam wall surface 43 of the groove cam 41 that guides the butt 47 of the knitting member 46, and seizure is prevented even when the knitting speed is increased. be able to. The cam surfaces to be chamfered 45 do not necessarily have to be on both sides of the groove cam 41. The chamfers 51b on the lower edge side of the transfer transfer cam 51 in FIG. 2 and the chamfers 52a on the upper edge side of the fixed needle raising cam 52 are not required. Alternatively, only one side may be used. Further, a chamfer 54 a may be provided on the inclined cam surface of the stitch cam 54.

Claims

A cam surface that is used by being mounted on a base plate of a carriage that reciprocates along a needle bed of a flat knitting machine, is generally plate-like, and is formed so as to be cut in the thickness direction from the plate-like surface. In a knitting needle driving cam that is driven in contact with a bat protruding from a knitting needle housed in a needle groove of a needle bed,
In the section where the cam surface is inclined with respect to the traveling direction of the carriage and the knitting needle is driven to move forward and backward, the edge of the corner of the cross section is the part where the plate-shaped surface transitions to the cam surface. A knitting needle driving cam including a removed section.
The butt that comes into contact with the cam surface protrudes 2 mm or more from the upper edge of the needle groove,
When mounted on the carriage, a 0.2 mm gap is provided between the plate-shaped surface and the upper edge of the needle groove,
The knitting needle driving cam according to claim 1, wherein a range in which the edge is removed is 0.2 to 0.4 mm from the plate-like surface.
The knitting needle driving cam according to claim 1 or 2, wherein the edge is removed in a section where an angle at which the cam surface is inclined with respect to the carriage traveling direction is at least 45 degrees or more.
A flat knitting machine, wherein the knitting needle driving cam according to any one of claims 1 to 3 is mounted on a carriage.