JPH0721584Y2 - Loom heald frame leveling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a leveling device for a heald frame of a loom.

[Prior Art] Generally, in a warp shedding device of a loom, adjustment of shedding amount,
Leveling of the heald frame is required during parts replacement or maintenance. Conventionally, as a leveling device, for example, a device shown in FIG. 4 has been disclosed in Japanese Utility Model Publication No. 59-31719. In this device, a lever 32, which is hooked at one end of a rope 31 connected to a heald frame (not shown), and a cam lever 34, which is connected by a link 33, are leveled at the end of a support shaft 35 that is swingably supported. A lever 36 is rotatably supported, and a worm wheel portion 37 is formed on the upper end of the leveling lever 36 and a pressing rod 38 extending parallel to the support shaft 35 is attached. Then, the leveling lever 36 is rotated clockwise in FIG. 4 by rotating the handle 41 which is detachably attached to the end of the rotary shaft 40 on which the worm 39 that meshes with the worm wheel 37 is formed. At the same time, the pressing rod 38 rotates each cam lever 34 in the clockwise direction so that all the cam levers 34 are arranged at the leveling position shown by the chain line in FIG. There is.

Further, in JP-A-59-43145, instead of the structure in which the leveling lever is rotated by a worm and a worm wheel, a hydraulic cylinder is pin-connected to the end of the leveling lever and the leveling lever is rotated by the action of the hydraulic cylinder. Devices have been proposed which are adapted to move.

[Problems to be solved by the invention] However, in order to rotate the leveling lever during the leveling work, it is necessary to rotate the heald frame against the spring force biasing in a predetermined direction. The worm is operated by the turning operation of the handle 41 disclosed in Japanese Patent No. 31719.
In the configuration of rotating the leveling lever 36 via 39,
There is a problem in that not only a very large force is required to operate the handle 41, but also a large number of rotations of the worm 39 are required and the leveling work takes time. On the other hand,
In the device disclosed in Japanese Patent No. 59-43145, since a hydraulic cylinder is used, the operator is not required to have a large operating force, but the pressing force of the hydraulic cylinder acts on the end of the leveling lever to cause the leveling lever to move. A large twisting force will act on. Therefore, it is necessary to manufacture the leveling lever so as to have a large torsional rigidity, and there is a problem that the leveling lever and a support shaft and a bearing for supporting the leveling lever are increased in size.

The present invention has been made in view of the above problems,
It is an object of the present invention to provide a leveling device for a heald frame of a loom, which does not require the torsional rigidity of the leveling lever to be so large during the leveling operation.

[Means for Solving the Problems] In order to achieve the above-mentioned object, in the present invention, a plurality of cam levers interlocking with a heald frame extend in parallel with a support shaft supported swingably, and the cam lever is provided. A leveling lever having a pressing portion that can be engaged with is rotatably supported by arm portions provided on both sides of the leveling lever, and arc-shaped tooth portions centering on a support shaft are provided on the substantially central outer surface of the pressing portion, A driven shaft extending in parallel to the support shaft is provided outside the pressing portion with one end protruding outside the tappet box, and a gear that meshes with the tooth portion is fixed to the driven shaft so as to rotate integrally with the driven shaft. A drive mechanism for driving the driven shaft is provided on the protruding end side of the.

[Operation] When the force of the drive mechanism is not applied to the driven shaft, the leveling lever is held at the standby position where the engagement with the cam lever is released. In this state, the cam lever is swung as the cam rotates, and the heald frame performs a predetermined opening motion.

When the drive mechanism is driven during the leveling work, the driven shaft is rotated and the leveling lever is rotated through the gear to the side that engages with the cam lever, and the pressing portion engages with the cam lever and the heald frame while rotating. The cam lever is rotated in the direction away from the cam against the pulling force of the rope connected to. Then, when the leveling lever is rotated to a predetermined position, all the cam levers are arranged at positions separated from the cam, and the heald frames are aligned at a constant height.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a rotary shaft 2 that is driven in synchronization with the rotation of the machine base is provided in the tappet box 1, and a plurality of cams (tappets) 3 are integrally rotatable on the rotary shaft 2. It is fixed. A cam lever 5 is rotatably supported at a position corresponding to each cam 3 on a support shaft 4 arranged in parallel with the rotary shaft 2. A cam follower 5a that engages with the cam 3 is provided at one end of the cam lever 5, and a hooking member 6 is hooked at the other end. The other end of a rope 7 connected to a heald frame (not shown) is attached to the latch member 6, and the cam lever 5 is always held in a state where the cam follower 5a is in contact with the cam 3.

Below each cam lever 5, a leveling lever 8 having a pressing portion 8a extending orthogonally to the cam lever 5 is supported at both ends of the support shaft 4 by arm portions 8b formed at both ends thereof. A driven shaft 9 is rotatably disposed in front of the leveling lever 8 with one end thereof protruding outside the tappet box 1. A gear 10 is integrally rotatably fixed to the driven shaft 9 at a position corresponding to the center of the leveling lever 8, and the gear 10 is attached to the outer surface of the central portion of the leveling lever 8.
A tooth portion 11 that meshes with is formed so as to extend in an arc shape centered on the support shaft 4. A pinion is provided on the protruding end of the driven shaft 9.
12 is fixed so as to be integrally rotatable. A rack 13 that meshes with the pinion 12 is arranged on the outside of the tappet box 1 so as to be horizontally reciprocable along a guide 14 in a state orthogonal to the driven shaft 9. A pair of rollers 15 are provided that are in contact with each other and guide the movement of the rack 13. Locking pin 16 protruding from the outer surface of the rack 13
And between the latch pin 17 protruding from the guide 14,
A spring 18 for urging the rack 13 to a standby position, that is, a position side where the engagement between the leveling lever 8 and the cam lever 5 is released.
Is hung.

A cylinder holder 19 is provided at the rear of the rack 13 (to the left in FIG. 1).
Is fixed. The cylinder holder 19 has a hydraulic cylinder
20 can be mounted so as to extend coaxially with the rack 13 while being sandwiched between the front and rear ends thereof. Hydraulic cylinder
In the state where 20 is attached to the cylinder holder 19, the front end of the piston rod 20a comes into contact with the rear end of the rack 13. The hydraulic cylinder 20 is connected to a foot-operated hydraulic pump 22 via a hose 21, and a check valve 23 is provided in the middle of the hose 21. The pinion 12, the rack 13,
A drive mechanism for the driven shaft 9 is constituted by the hydraulic cylinder 20 and the like.

Next, the operation of the device configured as described above will be described.

When the force of the piston rod 20a of the hydraulic cylinder 20 is not acting on the rack 13, the rack 13 is placed in the standby position by the action of the spring 18, and in this state, the leveling lever 8 engages with each cam lever 5. It is placed in the standby device released from the state. Therefore, the cam lever 5 is swung along with the rotation of the cam 3, and the heald frame performs a predetermined opening movement via the rope 7.

When performing the leveling work, the hydraulic cylinder 20 is attached to the cylinder holder 19. By fitting the hydraulic cylinder 20 so that both front and rear ends thereof are clamped by the cylinder holder 19, the piston rod 20a is positioned and arranged at a predetermined position where it abuts on the rear end of the rack 13. Next, when the operation lever 22a of the hydraulic pump 22 is stepped on, pressure oil is supplied from the hydraulic pump 22 to the hydraulic cylinder 20 via the hose 21, and the piston rod 20a protrudes to move 13 forward. With the forward movement of the rack 13, the pinion 12 is rotated together with the driven shaft 9 in the clockwise direction in FIG. 1, and the gear 10 is also rotated in the same direction. Tooth that meshes with the gear 10 as the gear 10 rotates
By the action of 11, the leveling lever 8 is rotated upward (counterclockwise). The pressing portion 8a engages with the lower surface of the cam lever 5 during the rotation of the leveling lever 8 and rotates the cam lever 5 in the direction in which the cam follower 5a separates from the cam 3 against the pulling force of the rope 7. Piston rod 20a
When the rack 13 is moved to a predetermined position after the projection of the above is completed, all the cam levers 5a are arranged at the positions where the cam followers 5a are separated from the cams 3 as shown by the chain line in FIG. Are aligned with.

The pulling force of the rod 7 acting on the cam lever 5 is large,
Although the leveling lever 8 is rotated against the force, unlike the prior art, the force for rotating the leveling lever 8 acts on the center of the leveling lever 8, so that the leveling lever 8 is required to be used in the conventional device. Even if the leveling lever 8 does not have a large torsional rigidity, the leveling lever 8 can be rotated without any trouble as the gear 10 rotates. Further, since the leveling lever 8 is driven by the hydraulic pressure, the operator is not required to have a large operating force.

When the pressure oil is returned to the hydraulic pump 22 and the piston rod 20a is pulled in after the leveling work is completed, the pulling force of the rope 7 rotates the cam levers 5 in the clockwise direction in FIG. The leveling lever 8 is also rotated together with the cam lever 5 in the same direction. This allows teeth
The pinion 12 is rotated counterclockwise in FIG. 1 integrally with the driven shaft 9 via the gear 11 and the gear 10, and the rack 13 is moved to the hydraulic cylinder.
Moved to side 20. After the rotation of the cam lever 5 is stopped, the rack 13 is moved to the standby position by the urging force of the spring 18, and the leveling lever 8 is also separated from the cam lever 5 via the pinion 12, the driven shaft 9, the gear 10 and the tooth portion 11. Is rotated to the standby position.

Since the pressing force of the piston rod 20a acts on the rack 13 in parallel with its moving direction, the hydraulic cylinder 20 may be arranged at a position where the end of the piston rod 20a abuts the end of the rack 13, Since the positioning of the mounting position of the hydraulic cylinder 20 does not have to be very accurate, the structure of this embodiment in which the hydraulic cylinder 20 is detachably mounted does not cause any problem. Further, when the hydraulic cylinder 20 is configured to be detachable as in this embodiment, it is not necessary to equip each machine base with the hydraulic cylinder 20, so that the cost of mounting the leveling is reduced.

The present invention is not limited to the above embodiment,
For example, the hydraulic cylinder 20 may be permanently attached, or the hydraulic pump 22 may be removable from the hydraulic cylinder 20. Further, a structure in which the driven shaft 9 is driven by a motor may be adopted.

[Effect of the Invention] As described in detail above, according to the present invention, since the driving force for the leveling lever acts on the center of the leveling lever, unlike the conventional device, the leveling lever is not required to have a large torsional rigidity, and the leveling lever and It is possible to downsize the support shaft and the bearing that support the leveling lever.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of an embodiment embodying the present invention, FIG. 2 is a schematic plan view, FIG. 3 is a schematic side view showing the operation, and FIG. 4 is a side view of a conventional device. Tappet box 1, cam (tappet) 3, support shaft 14, cam lever 5, leveling lever 8, pressing portion 8a, arm portion 8b,
A driven shaft 9, a gear 10, a tooth portion 11, a pinion 12 that constitutes a drive mechanism, a rack 13, a cylinder holder 19, a hydraulic cylinder 20, and a hydraulic pump 22.

Claims (1)

[Scope of utility model registration request] 1. A leveling lever is provided on both sides of the support shaft, wherein a plurality of cam levers interlocking with a heald frame extend parallel to a support shaft swingably supported and have pressing portions engageable with the cam lever. The rotatably supported arm portion is provided, and an arc-shaped tooth portion centering on the support shaft is provided on the substantially central outer surface of the pressing portion, and a driven shaft extending parallel to the support shaft is provided outside the pressing portion at one end. A gear that meshes with the teeth is fixed to the driven shaft so as to rotate integrally with the driven shaft, and a drive mechanism that drives the driven shaft is provided on the protruding end side of the driven shaft. Led frame leveling device for loom.