JPH0630865Y2 - Top arm device of spinning machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a top arm device for a spinning machine in which a pair of top arms of the spinning machine are pivotally attached to a frame so as to be vertically swingable.

2. Description of the Related Art In a conventional top arm device for a spinning machine, a pair of left and right top arms are pivotally attached to a frame so that the top arm can swing up and down. It is configured to apply and press the top roller to the bottom roller. During cleaning and maintenance inspection of each roller bearing, the front side of the pair of top arms is individually lifted to separate the presser from the top roller, and the top arms do not tilt in the upright position when they are lifted to almost vertical positions. As described above, the latching claws are hooked and locked, or held at the same standing position where they are applied to the stopper. However, in the top arm device configured as described above, if the hooking pawl for locking the top arm should come off during the work, the worker is injured and it is very dangerous. Therefore, it has been proposed that a friction plate urged by a spring is pressed against the pivotally connecting portion of each top arm so that even if the top arm is lifted, even if the hand is released, the friction plate is crimped and held stationary. .

Problems to be Solved by the Invention In the top arm device configured by applying frictional force to the pivotal attachment portion of the top arm described above, each top arm is provided with a strong frictional force so as to be stationary at the lifting position. When lifted, the frictional force becomes a great resistance, and a large arm force is required to lift each top arm to a substantially vertical standing position, and also a large arm force is required when lowered to the tilted position, resulting in poor workability. It was An object of the present invention is to solve such a problem.

Means for Solving the Problem A connecting arm that swings integrally with a top arm is provided, and one end of a gas spring is connected to the connecting arm by a pin, and the other end of the gas spring is rotated by the weight of the top arm. The pin is connected to the frame so that it cancels out, and the magnitude of the spring force of the gas spring is set so that the rotation moment due to the gas spring of the top arm becomes smaller than the rotation moment due to its own weight at the tilted position of the top arm and at the standing position. It is characterized in that it is set to be large.

Action When the top arm is erected from the tilted position to the standing position, the rotation moment due to the gas spring becomes larger than the rotation moment due to the weight of the pair of top arms.
A pair of top arms are held stationary in a standing position. When the pair of top arms are erected, the rotational moment by the gas spring acts on the top arms so as to cancel the rotational moment due to the weight of the top arms, so that the pair of top arms can be easily erected with a small force. Also, when the top arm in the standing position is tilted, it can be easily lowered to the tilted position by applying a slight force in the tilting direction by the action of the gas spring.

Embodiment FIG. 1 and FIG. 2 show an embodiment in which the present invention is applied to a drawing machine. It should be noted that the same components that are symmetrical to each other are denoted by the same reference numerals in the following description. Roller holders 4 are provided at the front portions (front side) of the left and right roller stands 3 that form part of the frame.
And the slide metals 5, 6 and 7 are attached to the rear of the roller stand 3, and the bottom rollers 12, 13, 14, between the pair of left and right roller holders 4 and slide metals 5, 6 and 7, respectively. 15 is pivotally supported. Fitting grooves 4a, 5a, 6a, 7a are provided at the upper ends of the roller holder 4 and the slide metals 5, 6, 7 at positions corresponding to the bottom rollers 12, 13, 14, 15 respectively. 4a, 5a, 6a, 7a to the top roller 16,
Bearing parts 16A, 17A, 18A, 1 of 17, 18, 19
9A is fitted. Next, the top rollers 16 and 1
The top arm device 1 arranged above 7, 18, 19 will be described. In FIG. 2, a bracket 21 having a supporting portion 21a and a mounting portion 21b is fixed to the rear portion of the lower roller stand 3 in the drawing, and a bearing member 21c provided on the supporting portion 21a projects to one side of the supporting portion 21a. A pivot 23 is supported, and the top arm 31 is attached to the pivot 23.
A joint portion 31c integrally provided at the rear end portion is screwed 25 together. A bracket 28 having a supporting portion 21a is fixed to the rear portion of the upper roller stand 3 in FIG. 2, and the pivot member 2 is attached to the bearing member 28c provided on the supporting portion 21a.
9 is supported, and the joint portion 32c of the top arm 32 is rotatably attached to the pivot 29 thereof. A plurality of (four in the drawing) pressurizers 35a, 35b, 3 are urged downward by springs 34 on the left and right top arms 31, 32.
5c and 35d are mounted so as to be vertically movable, and locking pins 37 are provided at the front ends of the top arms 31 and 32. A lever 38 is pivotally attached to the roller holder 4 by a pin 39 so as to be swingable, and a locking hook 40 is attached to the lever 38.
Is pin-connected and the handle 41 is fixed. When the locking hook 40 is locked to the locking pin 37 and the handle 41 is moved to the pressurizing position shown in the drawing, each pressurizer 35 is pressed.
a, 35b, 35c, 35d press the respective bearing portions 16A, 17A, 18A, 19A by the elastic force of the spring 34, and the respective top rollers 16, 17, 18, 19 are made to the respective bottom rollers 12, 13, 14, 15 Pressurize. When the handle 41 is rocked upward to release the locking of the locking pin 37 by the locking hook 40, the top arms 31, 32 are released.
Is slightly swung upward by the spring force of the pressers 35a, 35b, 35c, 35d, and the pressers 35a, 35b, 35
Inclination position where c and 35d are in contact with the bearing portions 16A, 17A, 18A and 19A (positions substantially equal to those of the pressurizing device in the figure)
become. A connecting member 44 is attached to the front ends of the top arms 31 and 32 with a mounting screw 36. Axis 2
One end portion of the connecting arm 46 is fixed to one end side of 3 by a fastening screw 47, and a connecting body 48 is slidably attached to a long hole 46b provided at the other end portion. One end of a cylinder body 50b of a gas spring 50 is pin-connected to the connecting body 48, and a tip of a rod 50a of the gas spring 50 is pin-connected to the mounting portion 21b of the bracket 21. The connecting arm 46 may be provided integrally with the top arm 31 instead of being provided separately from the top arms 31 and 32 as in the present embodiment. The gas spring 50 is one in which pressurized gas is sealed in the cylinder body 50b, and is configured to generate a substantially constant thrust force for any protrusion amount of the rod 50a. The connecting positions of both ends of the gas spring 50 are a pair of top arms 31,
It is set so that the stroke of the rod 50a is fully projected when 32 is set to the standing position shown by the phantom line in FIG. Further, the magnitude of the protrusion output of the gas spring 50 is such that the rotational moment of the pair of top arms 31, 32 due to the gas spring 50 is greater than the rotational moment of the pair of top arms 31, 32 due to their own weight.
It is set to be smaller in the tilted position and larger in the standing position. This allows the top arms 31, 3
When 2 is lifted to the standing position, the rod 50a of the gas spring 50 fully extends and functions as a stopper, and the protrusion force of the gas spring 50 causes the top arm 3 to move.
1, 32 are held in the standing position, and the top arm 31,
If 32 is tilted, a pair of top arms 31, 3
The rotation moment due to the weight of 2 becomes larger than the rotation moment due to the gas spring 50, and the top arm 3
1, 32 are held in the tilted position.

In the top arm device 1 configured as described above, if one top arm 31 or 32 or the connecting member 44 is lifted, the other top arm 32 or 31 is also lifted together, and the top arms 31, 32 are individually lifted. There is no need to lift it and you can save time. Even when the two top arms 31 and 32 are lifted together, when the top arms 31 and 32 are lifted from the tilted position, the rotational moment of the gas spring 50 acts so as to cancel out most of the rotational moment due to its own weight. Because it can be lifted easily with a small force. When the top arms 31 and 32 are lifted until the rod 50a is fully extended, in this state, the gas spring 50
The rotation moment due to is larger than the rotation moment due to the weight of the top arms 31 and 32, and the top arm 3
1, 32 are held stationary in the standing position. Therefore, the bearing portions 16A, 17 of the top rollers 16, 17, 18, 19 are
The maintenance work of A, 18A and 19A can be safely performed. When tilting the top arms 31 and 32 in the standing position, the top arms 31 and 32 can be easily tilted by pulling them toward you with a small force, and the rotation moment due to the weight of the top arms 31 and 32 on the way to the tilt position. Since it becomes larger, it can be swung to a tilted position with a lighter force thereafter, and in the tilted position, the top arms 31 and 32 are held stationary by their own weight.

According to the present invention, one end of the gas spring is connected to the connecting member of the top arm and the other end is connected to the frame by a pin, and the magnitude of the spring force of the gas spring is determined by a pair of top moments due to the rotational moment of the gas spring. The top arm is set to be smaller in the tilted position and larger in the standing position with respect to the rotation moment due to the weight of the arm, so that the left and right top arms can be raised and lowered with a small amount of force and in one operation. The workability can be improved and the burden on the operator can be reduced. In addition, by simply waiting for the top arm to stand up, the top arm can be held stationary at the stand up position due to the rotation moment of the gas spring.
This eliminates the need for the operation of hooking the top arm in the standing position and the hooking device for the top arm, and prevents the top arm from rapidly descending even when external force is applied to the top arm in the standing position. It can be prevented and safety can be improved.

[Brief description of drawings]

FIG. 1 is a side view of a top arm device showing a top arm in a partial cross section, and FIG. 2 is a plan view of the top arm in a partial cross section. 1 ... Top arm device, 3 ... Roller stand, 1
2, 13, 14, 15 ... Bottomula, 16, 1
7, 18, 19 ... Top roller, 31, 32 ... Top arm, 35a, 35b, 35c, 35d ... Pressurizer, 44 ... Connecting member, 46 ... Connecting arm, 50 ... Gas spring

Claims (1)

[Scope of utility model registration request] 1. A top arm device comprising a pair of top arms having a presser for pressing a top roller against a bottom roller and pivotally mounted on a frame so as to be vertically swingable. An arm is provided, and one end of the gas spring is pin-connected to the connecting arm, and the other end of the gas spring is pin-connected to the frame so as to cancel the rotation moment due to the weight of the top arm. The top arm device of the spinning machine is configured such that the rotation moment due to the gas spring of the top arm is smaller than the rotation moment due to its own weight at the tilted position of the top arm and larger at the standing position.