JPS5932623Y2 - Opening amount adjustment mechanism in passive opening device - Google Patents

Description

[Detailed explanation of the invention] This invention uses the restoring force of a spring to create a passive spring machine.
The present invention relates to an opening amount adjustment mechanism in a passive shedding device such as a passive cam type shedding device.

Conventionally, this type of opening adjustment mechanism includes, for example, the one shown in FIG.
As shown in Fig. 4, the structure consists of a shedding lever a, an adjustment piece B, and a joint bar C for a passive dobby machine, and a rope or the like connected to the heald frame is attached to the tip of the shedding lever so as to pull it to the right. The adjustment piece is vertically adjustable with respect to the shedding lever a, and is formed to be fixed by a set screw, and the joint bar C is formed in a bifurcated shape so as to sandwich the adjustment piece. The joint bar C was pivotally connected to the adjustment piece so as to apply tension to the joint bar C.

However, in a shedding device, particularly in a dobby machine, the distance between the front and rear heald frames is limited, so the outer dimension W of the joint bar C in FIG. 4 is also limited.

Therefore, the sum of the thickness of the shedding lever a and the total thickness of the joint bar C becomes the value obtained by subtracting the total thickness of the adjustment piece b, and the jetting lever property 1
Both bar c are thin and strong,
There were also problems in manufacturing, and it was also inconvenient to operate the set screw for fixing the adjustment piece b.

In view of the above, the object of this invention is to provide an opening amount adjusting mechanism that has sufficient strength, is easy to manufacture, and is easy to operate with a push screw.

The structure of this invention will be described in detail below with reference to the illustrated embodiments.

In FIGS. 1 and 2, the shedding lever 1 is formed in an inverted bifurcated shape, and its base is pivoted to the machine frame, and is carved on the lower right side of the hanging second lever 5. A rope (tension transmitting member) 4 that is linked to a heald frame (not shown) is connected to the notch 3.

An adjustment piece 6 is fitted into the second lever 5 which extends in the horizontal direction and is formed in an arc shape having a center downward, and the adjustment piece 6 is provided with a through hole 7 through which the second lever 5 passes. The adjustment piece 6 can be fixed at a desired position on the second lever 5 by a set screw 8 screwed onto the upper surface, and a semicircular bearing portion 9 is formed on the lower surface.

10 is a joint bar as a pressure transmission member,
A shaft portion 11 corresponding to the bearing portion 9 is formed at its upper end, and guide portions 12 are formed on both sides of the shaft portion 11 so as to come into sliding contact with both side surfaces of the bearing portion 9.

The lower end of the joint bar 10 is vertically symmetrical to the upper end.

13 is a jack lever, which is formed in an inverted T shape,
A joint bar 10 is connected to its left end, its right end is pivotally connected to the machine frame, a known hammer 14 is pivotally attached to its upper end, and hooks 15 are pivotally attached to both upper and lower ends of the hammer 14. , the hooks 15 are selectively pulled by knives 16 which are provided correspondingly to each other and which reciprocate in opposite directions to actively rotate the jack lever 13 clockwise,
An opening drive mechanism 17 including a jack lever 13 is configured such that the return in the counterclockwise direction is effected by the tension of a spring acting on the heald.

Next, the operation of this invention will be explained.

As mentioned above, when the jack lever 13 rotates clockwise, the tension from the spring acting on the heald frame is applied to the lobe 3, so the jetting lever 1 has a clockwise rotational force, so that the jack lever 13 rotates clockwise. The lever 10 receives a compressive force, and the shaft portions 11 at both ends thereof receive pressure.

Since a spring force always acts on the heald frame, the joint bar 10 is always compressed.

Therefore, even if the bearing 9 is semicircular, the joint bar 1
0 never leaves the adjustment piece 6.

If you want to increase (decrease) the stroke of the heald frame to adjust the opening amount, you can loosen the set screw 8 once, move the adjustment piece 6 to the left (right), and then tighten the set screw 8 to fix it. .

According to this invention, as described above, the transmission mechanism between the jetting lever and the joint bar is such that the joint bar operates as a pressure transmitting member, and the adjustment piece is fitted into the second lever of the jetting lever and is positioned so that the joint bar operates as a pressure transmitting member. The lever is adjustable and is configured to be pivoted to the joint lever with the side facing away from the joint lever, so the thickness of the second lever and the joint bar can be made sufficiently thick, and the strength is also increased. This makes it easier to manufacture, and the set screw is on the opposite side of the joint bar, making adjustment work easier.

[Brief explanation of drawings]

Fig. 1 and Fig. 2 show an embodiment of this invention, Fig. 1 is a partially sectional front view, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 shows the prior art. The explanatory diagram, FIG. 4, is a sectional view taken along the line BB in FIG. 3. 1... jetting lever 2... 4th lever...
Rope (tension transmission member), 5... second lever, 6...
-Adjustment piece, 7...Through hole, 8...Press screw, 9...Bearing, 10...Joint bar (pressure transmission member), 11...Shaft portion.

Claims (1)

[Scope of utility model registration request] A tension transmission member linked to the heald frame is connected to the first lever of the bifurcated shedding lever, and a pressure transmission member linked to the opening drive mechanism is connected to the second lever of the shedding lever via an adjustment piece. , the adjustment piece is fixed to a second lever passing through a through hole formed in the adjustment piece so as to be adjustable in position, and is pivotally connected to an end of the pressure transmission member on the side of the second lever facing the pressure transmission member. An opening amount adjustment mechanism in a passive opening device, characterized in that: