JPH086055Y2 - Active cam leveling device - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] This invention is to remove the cam lever from the cam and to adjust the height of each heddle frame when repairing when the warp thread of the loom is broken or when replacing the cam that commands the movement of the heddle frame. More specifically, the present invention relates to a leveling device for a positive cam machine, in which a leveling shaft that is rotated to be placed at a predetermined leveling position is rotated by an air cylinder.

[0002]

2. Description of the Related Art Conventionally, as a leveling device for a positive cam machine, an automatic leveling device utilizing an air cylinder is known.

In this automatic leveling device, the leveling shaft can be rotated between a leveling position where the heights of the heddle frames are matched and a normal position where weaving is possible.
An air cylinder for leveling operation is connected to the leveling shaft.

However, during weaving at the normal position, if a woven fabric having a load is woven, the air cylinder may not be able to hold the leveling shaft at the normal position, which may affect the weaving operation.

In this case, it is conceivable to replace the air cylinder with a large one having a large diameter, but it may not be possible to secure a space for arrangement in the air cylinder having a large diameter.

This invention solves the above-mentioned problems.
When performing the leveling operation with an air cylinder, when the leveling shaft is placed in the normal position where weaving is possible, the leveling shaft can be locked so that it does not rotate at that position, and the locking mechanism can be handled in a small space. An object is to provide a leveling device.

[0007]

A leveling device for a positive cam machine according to the present invention comprises a leveling shaft supported by a cam box, a leveling position where the height of each heddle frame is matched, and a normal position where weaving is possible. To, a leveling device for a positive cam machine, comprising a rotatable air cylinder for leveling operation, and a lock mechanism for restricting rotation of the leveling shaft from a normal position to a leveling position, wherein the lock mechanism is The bracket is fixed to the leveling shaft so as to extend outward in the radial direction of the leveling shaft, a lock lever, and a lock air cylinder. The base side of the lock lever is the bracket. It is held rotatably with respect to the cam box outside the locus from its normal position to the leveling position. , The tip end of the locking lever,
The lock air cylinder is extended from the base portion side so as to be orthogonal to the bracket in the normal position so that the bracket in the normal position can be locked by restricting the movement to the leveling position side, and the lock air cylinder is The piston rod is connected to the lock lever and is held by the cam box so that the tip end side thereof can be arranged / disengaged in the locus of the bracket.

[0008]

In the leveling device according to the present invention, the air cylinder for the leveling operation is operated, the leveling shaft is rotated to the leveling position, and then the predetermined warp thread is repaired and the cam is replaced. afterwards,
The air cylinder for leveling operation is returned to return the leveling shaft to the normal position where weaving is possible. Then, activate the lock cylinder in the lock mechanism,
Rotate the lock lever and lock the bracket at the tip of the lock lever to start weaving.

At this time, since the lock lever is arranged in the direction orthogonal to the bracket at the normal position, the base side is held by the cam box and the tip side is held by the bracket without affecting the operating force of the lock air cylinder. The movement of the bracket can be reliably regulated by opposing the axial compression force or the tensile force of the lock lever locked to. Therefore, as the lock air cylinder, a small one that can rotate only the lock lever can be used.

After that, when the leveling operation is performed again, the lock air cylinder is restored, the lock lever is disengaged from the locus of the bracket, the bracket is unlocked, and the leveling operation air cylinder is operated. Just go.

Therefore, in the leveling device according to the present invention, even when the leveling operation is performed by the air cylinder for leveling operation, when the leveling shaft is placed at the normal position where weaving is possible, the predetermined position is set at that position. You can lock the leveling shaft so that it does not rotate by the lock mechanism, and the lock mechanism also has a bracket,
A lock lever and a lock air cylinder that is small and can use the same working fluid as the air cylinder used for leveling operation can be used, and a small space can be dealt with.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Leveling device M of the positive cam machine of the embodiment
As shown in FIGS. 1 to 3, it includes one leveling shaft 20, two rods 22, two arms 23, an air cylinder 30 for leveling operation, and a lock mechanism R.

The leveling shaft 20 has leveling cams 21 fixed near both ends thereof and both ends thereof are held by the cam box 1. The leveling cams 21 are rotatably fitted on the rods 22 near the left and right sides of the cam box 1, respectively.

Each rod 22 has its tip end pivotally supporting both ends of a lever shaft 4 which rotatably holds a plurality of, for example, ten cam levers 5.

Each arm 23 pivotally supports both ends of the lever shaft 4 and is fixed to arm shafts 24 arranged near both left and right sides of the cam box 1. The arm shafts 24 are arranged so as to be held near the left and right sides of the cam box 1 at positions apart from the left and right sides of the plurality of cam levers 5 fixed to the lever shaft 4.

At a portion of one end of the leveling shaft 20 projecting from the cam box 1, as shown in FIGS.
The bracket 27 and the connecting lever 28 are fixed to each other.

A stopper 26 for stopping further movement of the bracket 27 is fixed to the cam box 1 around the bracket 27 when the leveling shaft 20 is placed at a normal position where weaving is possible. There is.

A piston rod 30a of an air cylinder 30 for leveling operation is connected to the tip of the connecting lever 28, and the air cylinder 30 is held by a base 29 fixed to the cam box 1 near the stopper 26. In the case of the embodiment, the air cylinder 30 has the piston rod 30a.
Is extended, the leveling shaft 20 is placed at the leveling position (the position where the bracket 27 is at the L position),
When the air cylinder 30 contracts the piston rod 30a,
The leveling shaft 20 is arranged at the normal position (the position where the bracket 27 is at the N position).

Above the bracket 27, a lock lever 32 is provided, which is rotatably held on the base portion 32a side by a pin 31 with respect to the cam box 1. The position of the pin 31 is the leveling position L of the bracket 27.
Is outside the movement locus between the normal position N and the normal position N.

The lock lever 32 regulates its movement toward the leveling position L on the side of the tip portion 32b so as to restrict the movement to the normal position N.
The bracket 27 is extendable from the base portion 32a side so as to be orthogonal to the bracket 27 at the normal position N so that the bracket 27 can be locked.

On the right side of the lock lever 32, a lock air cylinder 33 held by the cam box 1 via the base 29 is arranged. As for the piston rod 34 of the air cylinder 33, the tip end 32b side of the lock lever 32 is arranged in the movement path of the bracket 27.
It is detachably connected to the lock lever 32.

Next, the usage of the leveling device M will be described.

First, at the time of leveling operation, the air cylinder 33 is operated to contract the piston rod 34 to disengage the tip portion 32a of the lock lever 32 from the movement path of the bracket 27 (see the chain double-dashed line in FIG. 1).

The air cylinder 3 for leveling operation
0 is operated, the piston rod 30a is extended, and the leveling shaft 20 is rotated counterclockwise in FIG.

Then, the leveling cam 21 rotates,
The arm 23 moves to the left, and the cam lever 5 moves together with the lever shaft 4 around the arm shaft 24, contacts the stopper 25, and moves to the leveling position (see FIG. 4).

At this leveling position, the cam follower 6
6 is separated from the cam 2 fixed to the camshaft 3, and each heald frame 21 is connected via a joint lever 7, an adjustment piece 8, a jack lever 9, a connection rod 10 and a joint rod 11 connected to each cam lever 5. However, they are stopped at the intermediate position in the vertical direction.

Each connection rod 10 is connected to a plurality of jack levers 9 located below each heald frame 12, and these jack levers 9 are connected to the lower part of the heald frame 12 via a connection rod 11. The heald frames 12 are arranged so that they can be moved up and down while maintaining a horizontal state.

Then, after each cam lever 5 is placed at the leveling position, repairing when the warp thread of the loom is broken or replacement work of the cam 2 for instructing the movement of the heddle frame 12 is performed.

After that, when the weaving operation is restarted, the leveling operation air cylinder 30 is operated, the piston rod 30a is contracted, the leveling shaft 20 is returned to the normal position where the weaving is possible, and the bracket 27 is moved to the normal position N. To place.

Then, the lock cylinder 33 in the lock mechanism R is actuated, the piston rod 34 is extended, the lock lever 32 is rotated, and the end face of the tip portion 32a is locked so as to press the upper surface of the bracket 27. Just start weaving.

At this time, the lock lever 32 is in the normal position N.
Since the bracket 27 is arranged in the direction orthogonal to the bracket 27, the operating force of the lock air cylinder 33 is not affected and the base portion 32 is not affected.
The movement of the bracket 27 can be reliably regulated by opposing the axial compression force of the lock lever 32 that holds the side a on the cam box 1 (base 29) and contacts the side 32b on the bracket 27. Becomes Therefore, as the lock air cylinder 33, a small one that can rotate only the lock lever 32 can be used.

Therefore, in the leveling device M of the embodiment, the leveling operation is performed by the air cylinder 3 for leveling operation.
The leveling shaft 20
When it is placed in a normal position where weaving can be performed, the leveling shaft 20 can be locked at that position so as not to rotate by the lock mechanism R. The lock air cylinder 33 that can use the same working fluid as the air cylinder 30 used for the operation can be used, and the effect that it can be dealt with in a small space is achieved.

In the embodiment, when the rotation of the bracket 27 is restricted, a compression force is applied to the lock lever 32. However, as shown in FIG. 5, the lock lever 32 is configured to apply a tensile force when locked. May be. This lock lever 4
2 is disposed below the bracket 27 and has a tip portion 42.
b extends upward from the base portion 42a side, and a hook portion 42c capable of locking the tip portion of the bracket 27 is formed at the tip portion 42b.

[Brief description of drawings]

FIG. 1 is a view showing a leveling device according to an embodiment of the present invention.

FIG. 2 is a partial plan view of the embodiment.

FIG. 3 is a view seen from the direction III in FIG.

FIG. 4 is a diagram showing a leveling operation of the same embodiment.

FIG. 5 is a diagram showing another embodiment.

[Explanation of symbols]

 20 ... Leveling shaft, 27 ... Bracket, 30 ... Air cylinder for leveling operation, 32.42 ... Lock lever, 32a. 42a ... Base part, 32b. 42b ... Tip part, 33 ... Locking air cylinder, 34 ... Piston rod, N ... Normal position, L ... Leveling position, M ... Leveling device, R ... Lock mechanism.

Claims (1)

[Scope of utility model registration request] 1. A leveling shaft supported by a cam box is provided with an air cylinder for leveling operation, which is rotatable between a leveling position where the height of each heald frame is matched and a normal position where weaving is possible, A leveling device for a positive cam machine, comprising a lock mechanism for restricting rotation of a leveling shaft from a normal position to a leveling position, wherein the lock mechanism extends radially outward of the leveling shaft with respect to the leveling shaft. And a lock lever, and a lock air cylinder.The base side of the lock lever is outside the locus from the normal position of the bracket to the leveling position, and the cam It is rotatably held with respect to the box, and the tip side of the lock lever moves to the leveling position side. To lock the bracket in the normal position so as to be able to lock, and extend from the base side so as to be orthogonal to the bracket in the normal position, and the lock air cylinder is configured to lock the tip side of the lock lever with the lock lever. A leveling device for a positive cam machine, characterized in that the piston rod is connected to the lock lever and is held by the cam box so that the piston rod can be arranged / disengaged in the trajectory of the bracket.