JPS6226473Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tension device for a hand knitting machine.

[Prior Art] Conventionally, for example, as shown in Japanese Utility Model Publication No. 44-3256, there is no tensioning device for applying tension to the knitting yarn and no knitting yarn running through the tensioning device. Tension devices exist that include a moving moving member and a thread break sensing device having a switch actuated by the moving moving member.

[Problems to be Solved by the Invention] According to the conventional method, the yarn breakage sensing device is electrically connected to the power supply and the control device of the knitting machine by an electric wire, and is connected to the base arm together with the tension applying device. Since the base arm is screwed to the knitting machine when starting and finishing knitting, when the base arm is set in a predetermined position on the knitting machine or conversely stored, the electric wire is connected to the thread take-up spring of the tensioning device and the above-mentioned There is a risk that the electric wire may get tangled with the base arm, etc., and the electric wire may get in the way, causing trouble in setting and storing the base arm.

Therefore, the present invention makes it possible to easily attach and detach the yarn breakage sensing device to and from the support member that supports the tensioning device, thereby eliminating the drawbacks of the conventional devices.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention, in particular,
A support member supporting a tension applying device is fitted to the upper end of the column, and a locking piece extending from one side to the other side is fitted to the support member, and a locking piece extending from one side to the other side is fitted to the support member. A locking hole opened across the locking piece and a locking surface formed by notching the hole edge of the locking hole on one side of the locking piece are provided, and the thread breakage sensing device A plurality of locking pieces that fit into the locking hole of the support member are provided, at least one of the locking pieces is bendable in a direction perpendicular to the longitudinal direction of the locking hole, and the locking piece has a A locking step portion that can be engaged with the locking surface is formed.

[Function] When preparing the tension device, in order to support the thread breakage sensing device on the support member, the locking step of the locking piece is locked by simply pushing the locking piece into the locking hole of the support member. When engaged with the stop surface, the thread breakage sensing device is installed in a state where it is prevented from coming off. on the other hand,
To remove the thread breakage sensing device from the support member when storing the tension device, pull out the locking piece from the engagement hole while the locking step of the locking piece is displaced to a position where it is removed from the locking surface. This allows the yarn breakage sensing device to be easily removed.

〔Example〕

A first embodiment embodying the present invention will be described in detail below with reference to FIGS. 1 to 7.

Although not shown, a knitting carriage (not shown) is installed on the upper surface of the horizontally long knitting machine body, which has a needle bed with a large number of knitting needles arranged in rows, so that it can slide left and right in the direction in which the knitting needles are arranged. It will be hung. The carriage is equipped with a pulse motor, its operating circuit, etc., and is configured to slide stepwise. Note that the carriage may be continuously slid by a DC motor.

A column 1 is removably installed on the upper surface of the rear side of the knitting machine body, and the upper peripheral surface of the column 1 has a 180 mm diameter.
Fin-shaped support pieces 2 that are spaced apart from each other and protrude outward from each other.
is formed. Reference numeral 3 denotes an intermediate yarn guide wire whose base is fixed to the upper and lower intermediate portions of the support 1, through which the knitting yarn T paid out from a yarn source such as a yarn ball is inserted and guided to a tension applying device described later.

On the upper side of the support column 1, a tension applying device A composed of the following elements is removably supported.

That is, in the figure, reference numeral 4 denotes a support member integrally formed from a synthetic resin material, which includes a fitting hole 5 that fits into the upper end of the support column 1, and a pair of support pieces 2 that are fitted and supported by the pair of support pieces 2. a support groove 6 and a slit-shaped fitting groove 7
and a locking piece 8 having a rectangular locking hole 8A in the left-right direction. The left rear portion of the locking piece 8 is cut out, thereby forming a locking surface 8B.
Reference numeral 9 denotes a support plate whose base end is fitted and fixed into the fitting groove 7, and a shaft 10 is fixed to the upper side thereof in the left and right directions. Reference numeral 11 denotes a tension applying piece that is supported by the shaft 10 and that clamps the knitting yarn T and applies tension to it. Reference numeral 12 denotes a tension spring whose base end is attached to a support piece 13 supported by the shaft 10.
Reference numeral 14 denotes a thread guide plate whose base end is supported by the shaft 10, and an extension portion 15 extending forward in a vertical state.
, a pair of upright knitting yarn guide pieces 16, a pair of flat knitting yarn support pieces 17 and 18 of large and small sizes, and a gap 19 cut out between both of the knitting yarn support pieces 17 and 18,
The respective knitting yarn supporting pieces 17, 1 are sandwiched between the gaps 19.
A thread regulating piece 20 is formed upwardly projecting from the right side of the knitting thread 8, and a wire-shaped guide 21 for guiding the knitting thread T through the thread is fixed to the front end thereof.

The knitting yarn T is guided to the tension applying device A configured as described above in the following manner. That is, the knitting yarn T that has passed through the intermediate yarn guide wire 3 first passes through the tension applying piece 11, passes between the pair of knitting yarn guide pieces 16, over both the knitting yarn support pieces 17 and 18, and then passes through the guide piece 21. It is hung on the tension spring 12 through
This leads to the clue to the carriage.

The locking piece 8 of the tension applying device A is removably provided with a yarn breakage sensing device B that senses the absence of the knitting yarn T running at the tension applying device A.

The thread breakage detection device B will be explained below. Reference numerals 22 and 23 in the figure are a pair of left and right support boxes respectively made of synthetic resin material, which are butted against each other and connected with screws 24. There is.
The left side surface of the left support box 22 has a groove 25 in the middle, protrudes to the left side, and has a locking hole 8A of the locking piece 8.
Two-pronged locking pieces 26 and 27 that can be fitted are provided on the rear side surface of the rear side locking piece 27, and a locking step portion 27A that can be engaged with the locking surface 8B of the locking hole 8A. is formed, and a notch groove 28 is formed on the lower front side,
Furthermore, a switch support piece 29 is provided on the upper inner surface. The right support box 23 also has an upper base leg 30 of a rotating member 30 formed by bending a round bar into a substantially U-shape.
A is rotatably supported around an axis in the left and right direction, and a cutout groove 31 is provided at the lower front surface, and a switch holding piece 32 is further provided at the upper inner surface. Reference numeral 33 indicates the switch support piece 29 and the switch presser piece 32 inside the support boxes 22 and 23.
This is a normally closed switch that is clamped and fixed between the knitting machine main body side and the carriage operating circuit.
4, whose upper part is fixed to the front surface and whose lower free end is connected to the notched grooves 28, 31.
A switch actuating member 35 made of a leaf spring is provided which projects diagonally forward and downward to the position . The switch operating member 35 is normally placed in an inactive position in which it does not act on the switch 33, and operates the switch 32 by bending backward against its own elasticity.

This embodiment is configured as described above.

When preparing the tensioning device from the stored state, support the tensioning device A at the upper end of the support column 1 erected on the rear upper surface of the knitting machine main body, and insert the tensioning device A into the locking hole 8A of the locking piece 8. By fitting the bifurcated locking pieces 26 and 27 of the thread breakage sensing device B, once the rear side locking piece 27 is slightly bent toward the front side locking piece 26 against its own elasticity. , the locking stepped portion 27A engages with the locking surface 8B of the locking hole 8A, whereby the yarn breakage sensing device B is fixedly supported.

Thus, the knitting yarn T drawn out from the yarn source is stretched over the tension applying device A as described above, and the knitting yarn portion lying on the gap 19 between the pair of knitting yarn support pieces 17 and 18 is The free end 30B of the rotating member 30 is placed on top.

When knitting is started in this state, the switch 33 will remain energized and the carriage motor will not operate normally unless the knitting yarn T is given normal tension and the knitting yarn T is not cut or lost. The knitting action is performed by sliding the carriage.

During this knitting, for example, a knot or tangled part of the knitting yarn T may be caught on the intermediate yarn guide wire 3, etc., and the knitting yarn T may be cut or the knitting yarn T may be cut.
The pair of knitting yarn support pieces 17, 1 may be lost.
When the 6th member was absent at the gap 19 between the 8th
As shown, the free end 3 of the pivot member 30
0B rotates downward due to its own weight, and the notch groove 2
8 and 31 and abuts against the switch operating member 35 in the support boxes 22 and 23, and the switch operating member 35
is moved from the inactive position shown by the solid line to the switch operative position shown by the two-dot chain line in FIG. 3, and the switch 33 is turned off. This action takes place virtually instantaneously. This causes the motor to stop and the carriage to stop automatically.

Note that during knitting, for example, the carriage may be largely slid to the side of the needle bed or to the outside of the needle bed, or the knitting yarn T
By pulling the yarn by mistake, the knitting yarn T
If the free end 3 of the rotating member 30 becomes extremely loose,
0B pivots downwardly as shown in FIG. 7, but its free end 30B remains in the position shown in FIG. 7 or a slightly more downwardly pivoted position. Therefore, the switch actuating member 35 is actuated to close the switch 3.
3 is OFF, it will never work. Even if the free end portion 30B is rotated to a position where it comes into contact with the switch actuating member 35, the resistance of the knitting yarn applied thereto is acting on the free end portion 30B, and the switch actuating member 35 has its own elasticity. Since the switch actuating member 35 is placed in the inactive position by the switch actuator 35, the switch actuating member 35 cannot be actuated.

Further, since the pair of knitting yarn support pieces 17 and 18 are arranged close to each other and the gap 19 therebetween is set small, the free end portion 30B of the rotating member 30 is It is generally placed in the upper position. This is because frictional contact between the knitting yarn T and the inner edge of each knitting yarn support piece 17, 18 and a resistance effect against bending of the knitting yarn T occur in the gap 19. The free end 30B is supported on the knitting yarn T. In this case, the narrower the gap 19, that is, the closer it is to the diameter of the free end 30B, the more reliable the supporting action becomes.

In addition, when removing the yarn breakage sensing device B when storing the knitting machine or because it is unnecessary, press and displace the tip of the rear locking piece 27 forward by hand against its retaining elasticity. It is sufficient to remove the locking step portion 27A from the locking surface 8A of the locking piece 8, and in this state, pull out both the locking pieces 26, 27 from the locking hole 8.

[Effect of idea]

As detailed above, the present invention particularly includes a support member that supports a tensioning device fitted to the upper end of the column, and a locking piece extending from one side to the other side. , a locking hole opened from one side to the other side of the locking piece, and a hole edge of the locking hole being cut out on one side of the locking piece. a locking surface, the yarn breakage sensing device is provided with a plurality of locking pieces that fit into the locking hole of the support member, and at least one locking piece is arranged in a direction perpendicular to the longitudinal direction of the locking hole. In addition to being able to bend to
The locking piece is provided with a locking step that can be engaged with the locking surface.

Therefore, when the thread breakage sensing device is supported on the support member when preparing the tension device, the locking piece can be locked by simply inserting the locking piece into the locking hole of the support member and pushing it in. The stop portion can be engaged with the locking surface, thereby making it possible to attach and fix the thread breakage sensing device in a state where it will not come off. Also, when storing the tension device, the thread breakage sensing device can be engaged with the locking surface. To remove it from the support member, the thread breakage sensing device can be easily removed by pulling out the locking piece from the engagement hole while the locking step of the locking piece is displaced to a position where it is removed from the locking surface. Can be removed. Furthermore, since the yarn breakage sensing device can be separated from the support member as described above, there is no possibility that the electric wire connected to the switch of the yarn breakage sensing device will get tangled with the tensioning device etc. when preparing or storing the tensioning device. It has excellent practical effects, such as not causing any trouble in handling the tensioning device, etc.

[Brief explanation of the drawing]

1 to 7 show an embodiment embodying the present invention, in which FIG. 1 is a side view of the tension device, FIG. 2 is an exploded perspective view of the thread breakage sensing device, and FIG.
The figure is a side sectional view of the main part of the thread breakage sensing device, Fig. 4 is a front sectional view of the main part of the thread breakage sensing device, Fig. 5 is a sectional view of the attachment part of the thread breakage sensing device, and Figs. 6 and 7. is an action explanatory diagram. 1... Support column, A... Tension applying device, 4... Support member, 8... Locking piece, 8A... Locking hole, 8B...
Locking surface, T...knitting yarn, B...thread breakage sensing device, 2
6, 27...Locking piece, 27A...Locking step, 30
...Rotating member (moving member), 33...Switch.

Claims (1)

[Claims for Utility Model Registration] 1. A tensioning device for applying tension to the knitting yarn on the upper side of the support column installed on the rear upper surface of the knitting machine main body;
In the tensioning device, the tensioning device comprises a moving member that moves due to the absence of knitting yarn running at the tensioning device, and a yarn breakage sensing device having a switch actuated by the moving moving member. A support member supporting the tension applying device is fitted to the upper end of the column, and a locking piece extending from one side to the other side is fitted to the support member, and a locking piece is attached to the locking piece from one side to the other side. a locking hole opened across the length of the locking piece; and a locking surface formed by cutting out a hole edge of the locking hole on one side of the locking piece; is provided with a plurality of locking pieces that fit into the locking holes of the support member, and at least one
The locking piece is bendable in a direction perpendicular to the longitudinal direction of the locking hole, and the locking piece is formed with a locking step that can engage with the locking surface. Tension device of hand knitting machine. 2. The tension device for a hand knitting machine according to claim 1, wherein the switch of the yarn breakage sensing device is connected to an operating circuit for a power source, a carriage, etc. by an electric wire.