JPS581216B2 - Weft thread passing device in hand knitting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weft loss transfer device in thread knitting of a hand knitting machine.

Conventionally, the weft thread passing technique in thread knitting that has been generally practiced is, for example, as shown in Patent Application Publication No. 17022 of 1960, the weft thread is fed onto front knitting needles that are divided into front and rear sections. After that, the weft is pressed downward with a brush wheel, and the part of the weft corresponding to the rear knitting needle is placed below the rear knitting needle, and the weft is pressed downward in this way. There is one in which the rear knitting needles are advanced above the weft while the knitting needles are in the weft.

However, according to this document, if the tips of the brushes are disturbed due to long-term use of the brush wheel, or if a slight error occurs in the assembly position of the brush wheel, the weft threads may be pressed down more than necessary. The weft may become loose, or conversely, the back knitting needle may not be able to advance above the weft due to insufficient pressing, or the tip of the brush may not be properly applied to the weft. Various drawbacks have been pointed out, such as the inability to engage.

In addition, as another weft thread passing technique in thread knitting, as shown in Utility Model Application Publication No. 6772 of 1972, a vertical difference is applied to the front part of both the front and rear knitting needles, which are divided into front and rear knitting needles. In this state, both knitting needles are aligned in the front-rear direction, and a thread opening is passed through the vertical distance between the two knitting needles to supply the weft yarn between the two knitting needles.

According to this, in order to avoid interference between the yarn opening and both knitting needles, since the weft is supplied by passing the yarn through the vertical interval between the two knitting needles with the above-mentioned vertical difference, It is necessary to make a large vertical difference between the knitting needles, and if this vertical difference is small, the yarn head and both knitting needles may be damaged or broken due to the interference, and furthermore, the shape and structure of the knitting needles may be damaged. , various undesirable points have been pointed out, such as restrictions on manufacturing accuracy, etc.

Furthermore, as shown in Utility Model Application Publication No. 19104 of 1970 and Utility Model Application Publication No. 76044 of 1970, the front part of the rear knitting needle of both the front and rear knitting needles which are divided into front and rear sections is arranged in a raised position. The front parts of both knitting needles are made vertically different from each other, and the weft is supplied to the upper surface of the front part of the front knitting needle, and the front part of the rear knitting needle that has already been raised is advanced above the weft, or There is a knitting machine in which the weft is inserted between the front portions of both the front and rear knitting needles, which have a vertical difference, so that the weft is supplied between the two knitting needles.

However, according to these methods, when raising the front part of the rear knitting needle in order to create a vertical difference between the front parts of both the front and rear knitting needles, special means are required, which is accompanied by difficulty. It is.

That is, when an attempt is made to raise the front part of the rear knitting needles with the front part of the carriage that slides in a direction across the arrayed knitting needle group,
Since the front part of the front knitting needle is already protruding from the movement path of the front part of the carriage, it is necessary to raise the front part of the rear knitting needle without colliding with or interfering with the front part of the front knitting needle. Therefore,
According to the above-mentioned Utility Model Application Publication No. 19104 of 1972, a special horizontal rod is arranged below the needle stems of all knitting needles to act as a fulcrum, and the carriage is equipped with a butt of the rear knitting needles. It has a special configuration in which a needle selection cam has a push-down surface and a bottom butt guide side that advance while pressing down, and according to the above-mentioned Utility Model Application Publication No. 76044 of 1971. , a special knitting needle raising member that penetrates inside the hook tip of the rear knitting needle and gradually lifts it up while hooking the hook is specially provided separately from the high position holding member, and these knitting needle raising members and high position holding member A technically difficult method was used to manufacture and improve the accuracy by hanging the knitting needle, and in addition, hooking it to the hook of the rear knitting needle and raising the hook is difficult. Since it is extremely small and rounded, it has been pointed out that it has various drawbacks, such as being extremely unstable and prone to uncertainty.

However, in order to eliminate the various drawbacks of the conventional knitting needles described above, the present invention has been developed to remove the hook upper end of the front knitting needle of the front knitting needle while keeping the front part of the front and rear knitting needles divided into front and rear sections. At the same time, the weft is placed below the front part of the front knitting needle at a position forward and above the hook of the back knitting needle, and the weft is placed below the front part of the back knitting needle. By arranging the weft sections, the weft threads are laid out in a wavy manner between the two knitting needles, so that no pressing force is applied to the weft threads, and the weft threads are not particularly disturbed by the rear knitting needles. The weft thread can be easily placed in the position, and the weft thread can be easily and accurately passed without creating a particularly large vertical difference between the front portions of the knitting needles.
Furthermore, this can be implemented easily and inexpensively.

An embodiment embodying the present invention will be described in detail below with reference to the accompanying drawings.

In the figure, 1 is a needle bed, and a large number of comb teeth 2 are arranged and fixed at equal intervals on the front edge of the needle bed, and between each of the comb teeth 2, a knitting needle 3 can be moved in the front and back direction, and the front part of each needle can be moved upward. movably supported.

In the figure, reference numeral 4 denotes a carriage mounted so as to be able to reciprocate and slide in the left and right directions on the upper surface of the needle bed, and on the lower surface of the carriage, various cams that operate to guide the butt of the knitting needles 3 are arranged symmetrically around the left and right center. has been done.

That is, to explain the various cams, in the figure, 5 is a rear needle rest passage forming plate, 6 is a front needle rest passage forming plate, and 7 is a pair of cams arranged in an eight-shape between the two plates 5 and 6. Knitting cam 8, a pair of intermediate guide plates installed horizontally between the knitting cam 7 and the front needle resting passage forming plate 6, 9 a central guide cam, and 10 knitting on the front side of the rear needle resting passage. A pair of tact cams that open and close the passage,
11 is a pair of opening/closing cams for opening and closing the entrance of the braided passage, 12 is a pair of movable backward cams, 13 is a pair of front swing cams, 14 is a pair of rear swing cams, and 15 is a pair of rear swing cams. A pair of switching cams 16 are pivotally supported on the outer side, and are a pair of front needle rest passage opening/closing cams.

Incidentally, the outer inclined advancing cam surface 7A of the knitting cam 7 constitutes an inclined advancing member, as will be clear from the explanation of the thread knitting operation below.

Furthermore, a needle selection cam mechanism is provided on each of the left and right outer portions of the cams to divide the butts of the knitting needles 3 into front and rear sections after completion of knitting and to lead them out to the outside of the carriage.

That is, in the figure, reference numeral 17 denotes a pair of left and right fixed guide cams that respectively advance the butts of the knitting needles 3 introduced from outside the carriage to approximately the flat-out position.

Reference numeral 18 denotes a pair of one-way guide cams, which slightly advance the butts of the knitting needles 3 after passing through the rear ends of the knitting cams 7, but are avoided forward by the butts of the knitting needles 3 introduced from the opposite direction. .

Reference numeral 19 denotes a pair of lowering cams that push down the butts of the knitting needles 3 advanced by the one-way guide cams 18 a certain distance downward at the rear side of the fixed guide cams 11, and the lowered knitting needles 3 are pushed down by a needle (not shown). Whether or not it is engaged with the sorting engagement protrusion of the needle selection handle plate in the floor.

Reference numeral 20 denotes a pair of sorting cams arranged at an angle on the outside of each of the rolling down cams 19, which allow the butts of the knitting needles 3 at the rolling down position, which are locked on the screening locking protrusions by the downstream side, to pass through as they are, but are not locked. The butts of the knitting needles 3, which have returned to the upper position without any movement, are moved back and guided to the knitting preparation position A.

Reference numeral 21 denotes a pair of sorting difference enlarging cams which are arranged on the outside of each of the sorting cams 20 at an angle opposite to the sorting cams 20, and each of which slightly advances the butt of the knitting needles 3 that have been sorted forward by the sorting cams 20 to remove the needles. The needle is guided to the previous needle selection position B.

22 is a pair of fixed guide plates.

The knitting needles 3 sorted forward by the sorting cam 20 are returned to the upper position by appropriate means before reaching the sorting difference enlarging cam 21.

The butts of the knitting needles 3 sorted forward and backward by the needle selection cam mechanism are used for knitting various patterns when the carriage 4 turns back and slides. The cam may be placed at the solid line position shown in FIG. 1, and thereby the butts of the front knitting needles 3B and the rear knitting needles 3A are guided to the paths shown by the dashed lines in FIG.

In the figure, reference numeral 23 denotes a support frame that is removably attached to the front portion of the carriage 4 by a pair of left and right tightening screws 24, and a flat wave-shaped support plate 25 is fixed to the front lower part of the support frame.

In the figure, 26 is a single needle lifting/lowering member integrally formed of a material such as synthetic resin, and a fitting portion 28 that fits into a horizontally long guide groove 27 bored in the support plate 25 allows
It is possible to move left and right within the range of the guide groove 27.

On the upper surface side of the needle elevating member 26, as shown in FIG.
A pair of left and right lifting cam surfaces 29 (
(on the contrary, it also has the effect of lowering it to its original position) and a lifting holding surface located between both lifting cam surfaces 29 and keeping the front part of the front knitting needle 3B raised by this lifting cam surface 29 in the raised position. 30, and the rear knitting needle 3A is placed on the advancing force surface 7 of the knitting cam 7. Between a pair of left and right valley-shaped auxiliary lifting cam surfaces 31 that raise the front part of the knitting needle 3A to the height of the lifting holding surface 30 when it is advanced by a (needle advancing member) and both auxiliary lifting cam surfaces 31. position and weft 3
2 is inserted from below the sliding plane of the knitting needle and is fed out a certain distance above the same plane.
A pair of weft holding surfaces 34 disposed above the hooks of the rear knitting needles 3A in the normal position;
A pair of left and right edge-like knitting yarn advance prevention edges 35 are formed to prevent the upper part of the old stitch suspended from A and 3B from advancing.

The weft supply port 33 provided in the needle elevating member 26 is formed in a part of the needle elevating member 26, but it can be constructed from a separate member (for example, a cylindrical member, etc.) and the needle row It may be fitted or fixed to the lowering member 26.

Furthermore, as is clear from each drawing, the upper edge of the weft supply port 33 and the upper surface of its periphery are located a certain distance below the upper surface of the lifting and holding surface 30, so that the weft thread fed out from the weft supply port 33 is 32 is not pinched between the lower surface of the front knitting needle 3B on the rising holding surface 30 and the upper edge and peripheral upper surface of the weft supply port 33, and the weft 32 can always be smoothly fed out. It is something.

In the figure, reference numeral 36 denotes a knitted fabric advance prevention plate which is fixed to the lower surface of the needle lifting member 26 with a pair of left and right fixing screws 37 on the lower side of the support plate 25, and the rear edge of the part that protrudes diagonally backward and downward. This prevents the stitches suspended from each of the knitting needles 3A and 3B from moving forward, and a circular hole 38 is provided corresponding to and opening below the weft supply port 33.

In the figure, reference numeral 39 denotes an engaging member disposed below the knitted fabric advance prevention plate 36, which is provided within a certain range with respect to the needle lifting member 26 by a long hole 40 that is long in the left and right direction and fits into the pair of fixing screws 37. It is supported so as to be movable from side to side, and has an engaging piece 41 hanging downward on its front edge.
An insertion hole 42 for the weft 32 is provided in the weft 32, and inclined surfaces 43 are provided at the left and right front edges of the upper surface.

In the figure, 44 indicates the guide groove 2 on the lower surface of the support plate 25.
A holding member disposed on the front side of the holding member 7, in which a single through hole 45 slightly elongated in the front-rear direction is provided in the center thereof, and the holding member is screwed and fixed to the support plate 25 into the through hole 45. A screw shaft 46 is fitted, thereby making it possible to rotate around the screw shaft 46 and to move slightly back and forth.

The left and right rear edges of the holding member 44 are engaged with the left and right front corners of the knitted fabric advancing prevention plate 36, and the needle elevating member 26
A pair of left and right hook-shaped holding parts 47 are provided for holding the parts at the ends of the guide groove 27, and open ends of the holding members 44 are provided at the left and right front edges of the holding members 44, respectively. A ball 48 is fixed thereto which engages the retaining member 44 and normally holds the retaining member 44 in its forward and backward movement position.

In the figure, reference numeral 49 denotes a thread guide rod whose both ends are fixed to the lower surface of the support plate 25, whose middle part projects forward, and at the left and right ends of the projecting part there are approximately U-shaped regulations that project further forward. A knitting yarn take-up device (not shown) and the insertion hole 42 of the engaging member 39 are provided between the two regulating portions 50.
This prevents the weft 32 from moving inadvertently between the weft and the weft.

In the figure, reference numeral 51 denotes a center yarn opening fixed to the lower surface of the upper center of the support frame 23, and after the weft yarn 32 is wrapped around both the knitting needles 3A and 3B, the base yarn for plain knitting is supplied to the two knitting needles 3A and 3B. do.

The left and right sides of the central thread opening 51 are provided with projecting obliquely forwards, respectively, and the two knitting needles 3A and 3B are provided at both the left and right sides of the center yarn opening 51, respectively.
A generally whisker-shaped latch control piece 52 is secured to maintain the latch in the open state.

In the figure, 53 indicates the support frame 2 corresponding to the front of each knitting cam I.
3, each of which is rotatably supported on a mounting plate 54 fixed to the support frame 23 on the periphery of a shaft 55 inclined diagonally rearward and diagonally outward from the left and right. knitting needle 3
After A dives under the weft 32, each knitting needle 3 at the back and front
When the knitting needles A and 3B are advanced by the advancing cam surface 7A of the knitting cam T, they engage the upper part of the old stitches on the two knitting needles 3A and 3B as well as the weft thread 32 diagonally and downwardly from above, and rotate while rotating. The advance of the upper part of the old stitch and the weft yarn 32 is suppressed, and rather, the upper part of the old stitch and the weft yarn 32 are caused to retreat slightly and fall out.

Reference numerals 56A and 56B in the figure represent a pair of left and right one-way operating members used to change the position of the left and right moving end positions of the needle elevating member 26, and as shown in FIGS. 8a and 3, respectively, the needle bed 1 The comb is supported by a pair of substantially L-shaped joining rods 57 that are joined to the front lower surface and front surface of the comb, and a supporting rod 58 that is joined to and supported by the approximately dogleg-shaped bent portions of several of the comb teeth 2. tooth 2
It is supported by the comb teeth 2 at arbitrary positions on the needle bed 1 in relation to the arrangement pitch of the needle bed 1 so as to be freely inserted and removed.

On the front lower surface of each one-way operating member 56A, 56B,
There are actuating pieces 60A and 60B made of thin bullet plates each having one end fixed by a screw 59, and each actuating piece 60A, 6
The swingable open end of 0B has operating surfaces 61A and 61B (facing each other) that protrude in a direction substantially perpendicular to the side edge of the engaging piece 41 of the engaging member 39 at a position where it can engage with the side edge of the engaging piece 41 of the engaging member 39. The actuating surfaces 61A, 61B are oppositely inclined outwardly inclined surfaces 62A, 62B (facing each other outwardly).

This embodiment is configured as described above.

The thread knitting method will be explained below.

That is, if the weft yarn 32 is inserted in advance between both regulating portions 50 of the yarn guide rod 49, through the insertion hole 42 of the engaging member 39, the circular hole 38 of the knitted fabric advance prevention plate 36, and the weft yarn supply port 33, both K1 The base thread is inserted into the center thread port 51, the various cams on the lower surface of the carriage are arranged at the solid line positions shown in FIG. It is held at the moving end, and a pair of one-way operating members 56A and 56B are set on the left and right outside of the active knitting needle section.

When the carriage 4 reaches the active knitting needle section by sliding the carrier 4, the butts of the front and rear knitting needles 38, 3A, which are divided in advance into the front and back, are moved to each other as shown in FIG. First, the front knitting needle 3B is advanced by the fixed guide cam 17 to a substantially flat-out position, and the front part thereof is moved to the lifting cam surface 2 of the needle lifting member 26.
9, the rear knitting needle 3A is raised above the hook upper end of the rear knitting needle 3A, and is held at the raised position by the raising holding surface 30 (see FIG. 7a).

Subsequently, the rear knitting needles 3A begin to be gradually advanced from the knitting preparation position A by the opening/closing cam 11 and the subsequent advancing force surface 7A of the knitting cam 7.

As the front part of the front knitting needle 3B that has been raised passes above the weft supply port 33, the front part of the front knitting needle 3B passes above the weft supply port 33, and the front part of the front knitting needle 3B is located below the front part of the front knitting needle 3B and in front of the hook of the back knitting needle 3A. The weft 32 fed out from the weft supply port 33 is placed in the upper position (see Figures 1b and 3).
(see figure).

Subsequently, the rear knitting needles 3A, which have already moved forward, are still moved forward by the advancing cam surface 1 (needle advancing member).
As its front portion begins to be raised by the auxiliary raising cam surface 31, its hook passes under the weft thread 32 at the aforementioned position and projects forward thereof.

(See Figure Ib and Figure IC). Therefore, the rear knitting needle 3
When the front part of A is lifted onto the lifting holding surface 30, the knitting needles 3A and front knitting needles 3B join together and are further advanced by the advancing cam surface 7A. The wheel 53 acts to prevent the weft yarn 32 and the old stitches from advancing, and in particular, the weft yarn 32 is retreated until it comes off completely (see FIG. 7C), so that the weft yarn 32
is laid out in a wavy manner on the needle stems behind the latches of both knitting needles 3A and 3B (see Fig. 7d).

Furthermore, the front portions of both knitting needles 3A, 3B are lowered to their normal original positions by the lifting cam surface 29 on the opposite side.

Thereafter, both knitting needles 3A and 3B are supplied with ground yarn from the center yarn opening 51 at the center of the carriage, and further knit stitches under the action of the knitting cam γ on the opposite side.

As a result, the weft yarn 32 is inserted into the knitting stitch and is locked therein.

Furthermore, both the knitting needles 3A, 3 that have been subjected to the action of the knitting cam I
B is selectively guided to knitting preparation position A or needle selection position B for thread knitting of the next course under the action of the needle selection cam mechanism.

In this way, when knitting of one course of the working knitting needle section is completed and the carriage 4 is slid outside the working knitting needle section, the knitting of the eighth course is completed.
As shown in Figures a and b, when the engaging piece 41 of the engaging member 39 engages with the operating surface 61A of the operating piece 60A of the one-way operating member 56A on the sliding direction side, the engagement Since the engaging piece 41 of the mating member 39 will be pushed in the direction opposite to the sliding direction relative to the carriage 4, first,
The inclined surface 43 of the engaging member 39 engages with the holding member 44 and rotates the holding member 44 as shown in the figure.
The needle elevating member 26 is then moved to the opposite side of the sliding direction relative to the carriage 4.

This state continues thereafter, but when the needle elevating member 26 reaches the other end of the guide groove 27, the relative movement of the needle elevating member 26 with respect to the carriage 4 is stopped, and as shown in FIG.
As shown in FIG. 2, in this position, the needle elevating member 26 is held again by the holding member 44, and the actuating piece 60A of the one-way actuating member 56A resists its own elasticity to engage the engaging member 39. Avoid the piece 41 and pass through this position.

Next, when the carriage 4 is turned back and slid to start the next course of thread knitting, as shown in FIG. However, in this case, since it abuts against the inclined surface 62A of the operating piece 60A, the operating piece 60A is separated from the engaging piece 41 by the so-called cam action of the inclined surface 62A. Therefore, the arrangement of the needle elevating member 26 is not changed.

Thereafter, by continuing to slide the carriage 4, thread knitting is performed within the active knitting needle section, and arrangement switching of the needle lifting member 26 outside the same section is performed in the same manner as in the previous course.

As described in detail above, the present invention includes arranging the front portions of the front knitting needles above the upper ends of the hooks of the rear knitting needles by means of the needle elevating member while keeping the front portions of both the front and rear knitting needles divided into front and back sections. A weft is supplied to a position below the front part of the front knitting needle and in front and above the hook of the back knitting needle through a weft supply port, and then the front part of the back knitting needle is placed under the weft. The knitting needles are advanced and arranged by a needle advance cam, so that the weft yarn is passed between the two knitting needles in a wavy manner.

Therefore, when placing the weft thread at the position, there is no rear knitting needle at that position, and no pressing force is applied to the weft thread as in conventional knitting needles, so the weft thread is placed at the position. In addition, since the rear knitting needle is moved forward and submerged under the weft while the weft remains in the position, the knitting needles can be easily placed under the weft. By simply advancing only the rear knitting needle without making a particularly large vertical difference in the front part, the weft can be accurately and easily passed between the two knitting needles.

Furthermore, a needle elevating member is mounted on the carriage mounted on the needle bed, and a needle elevating member that engages with the lower surface of the front part of the front knitting needle to raise the front part in order to control the weft threading action, and a needle lifting member that lifts the front part of the front knitting needle by engaging with the lower surface of the front part of the front knitting needle in order to control the weft thread wrapping action. A weft supply port for supplying the yarn to a position in front of and above the hook of the rear knitting needle on the side, and a needle advance member for advancing the front part of the rear knitting needle forward from behind the lower knitting needle of the weft are installed together. Therefore, the above-mentioned weft thread passing action can be performed automatically and accurately by a simple sliding operation of the carriage, and furthermore, the raising of the front part of the front knitting needles is not hindered by the rear knitting needles or the weft threads. It can be easily and reliably carried out on the underside without any problems, and has excellent effects such as being able to obtain related structures extremely simply and at low cost.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway bottom view of the carriage;
The figure is a rear view of the front part of the carriage, Figure 3 is an enlarged side view of the main parts of the needle bed and the front parts of the carriage, Figure 4 is an enlarged perspective view of the needle lifting member, and Figure 5 is part 1 of Figure 2. FIG. 6 is an enlarged front view of a portion of the needle bed, and FIGS. 7 a - d and 8 axd are action explanatory views. 1...needle bed, 3A...rear knitting needle, 3B
...Front knitting needle, 4...Carriage, 7A
... Advance cam surface, 26 ... Needle lifting member, 32 ... Weft, 33 ... Weft supply port.

Claims (1)

[Claims] 1 A carriage that is slidably mounted on the needle bed engages with the lower surface of the front part of the front knitting needle, which is divided into front and rear sections, and holds the front part in a raised position above the upper end of the hook of the rear knitting needle for a certain period of time. When the front part of the front knitting needle is raised and arranged by the needle elevating member that is lowered after being placed, and the front part of the front knitting needle is raised by the needle elevating member, the needle is lowered at a position below the front part and in front and above the hook of the rear knitting needle. a weft supply port for supplying and arranging the weft; and a needle advance force mechanism that advances the front portion of the rear knitting needle forward from behind the weft while the weft is being supplied and arranged at the position. A weft passing device for thread knitting of a hand knitting machine, characterized by comprising: