JPH0633400Y2 - Wrap type grip - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a wrapping type gripping tool capable of automatically chucking a filamentous specimen.

B. Conventional Technology As a gripping device for the filamentous specimen, the one shown in Fig. 4 is known. In this, the filamentous sample TP is inserted and gripped between the pair of chuck teeth 1A and 1B, but the sample TP may be cut near the chuck teeth 1A and 1B and an accurate test may not be possible. Therefore, conventionally, as shown in FIG. 5, a wrapping type gripping tool for gripping the sample TP between the chuck teeth 2A and 2B and winding the sample TP around one chuck tooth 2B has been adopted. There is.

C. Problems to be solved by the invention With this winding type gripping tool, conventionally, an operator manually winds the filamentous sample TP around one of the chuck teeth (winding drum) 2A every time the test is performed. ing. Recently, there is a demand to automatically attach this filamentous sample to the gripping tool, but the work process of inserting the sample TP between the pair of chuck teeth 2A and 2B and winding it around the chuck tooth 2B is automated by a simple transport mechanism. It was difficult.

An object of the present invention is to provide a wrapping type gripping tool which can automatically mount a filamentous sample by a simple transport mechanism.

D. Means for Solving the Problems The winding type gripping tool according to the present invention is a winding body around which a holding body rotated by a rotation driving means and an end portion of a filamentous sample arranged on the holding body are wound. A mounting drum, a tightening tooth arranged on the holding body so as to face the winding drum, and a contacting / disconnecting means for separating and contacting the winding drum and the tightening tooth so as to grip and release the filamentous specimen between them. The thread-shaped sample is wound around the winding drum by rotating the holder while the thread-shaped sample is inserted between the winding drum and the tightening teeth.

E. Action Insert the filamentous specimen gripped by the transport mechanism into the gap between the winding drum and the tightening teeth. After gripping the filamentous specimen between the winding drum and the clamping teeth, or before gripping them, they are rotated so that the filamentous specimen winds around the winding drum.
As a result, it can be automatically attached to the winding type gripping tool,
The transport mechanism is simply a linear movement in which the filamentous sample is inserted between the winding drum and the tightening teeth, and automation can be easily achieved.

F. Embodiment An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 (a) is a front view showing a part of the upper grip 10 in a cross section, and FIG. 1 (b) is a right side view of the same, and a part thereof is shown in a cross section.

The upper grip 10 has an outer ring 11 and an inner ring 12 (holding body) rotatably held inside thereof, and a shaft of a hydraulic motor (rotational drive means) 14 screwed to the outer ring 11 with a bolt 13. 14a and the inner ring 12 are connected by a key 15. A sample winding drum 16 is screwed to the inner ring 12 with bolts 17, and a flat hydraulic cylinder (separation / contact means) 18 is screwed to bolts 19. The tightening teeth 20 are connected to the piston 18a of the hydraulic cylinder 18, and the tightening teeth 2 are extended by extending the piston 18a.
0 is pressed against the chuck surface 16a of the winding drum 16,
TP can be gripped. An oil passage 21 is formed in the side surface of the outer ring 11, and an oil groove 22 communicating with the oil passage 21 is formed in the entire circumference of the inner peripheral surface of the outer ring 11. In addition, the inner ring 12 has an oil groove
An oil passage 23 that connects the hydraulic cylinder 18 and the hydraulic cylinder 18 is formed,
As a result, pressure oil can be supplied from the oil passage 21 of the outer ring 11 to the hydraulic cylinder 18. The oil passage shown in FIG. 1 (b)
21 and 23 are shown at positions shifted by 90 degrees from the actual position for ease of explanation. The outer ring 11 is also provided with a screw hole 11a for connecting to the load shaft or the fixed shaft of the tester. Reference numeral 24 is an O-ring that seals the oil groove 22, and 25 is an O-ring that seals the connection between the hydraulic cylinder 18 and the oil passage 23.

In contrast to the upper grip 10 configured as described above, the lower grip 30 includes an inner ring 12, a winding drum 16 screwed to the inner ring 12, a hydraulic cylinder 18, and a tightening tooth 20, as shown in FIG. Other than the difference, the structure is exactly the same as the upper grip 10.

The automatic mounting of the filamentous sample TP will be described with reference to FIGS. 2 and 3.

As shown in FIG. 2, the upper grip 10 is screwed to the load shaft 41, and the lower grip 30 is screwed to the fixed shaft 42 so as to face each other.
The upper part of the filamentous sample TP is gripped by a transport mechanism (not shown) and inserted into the gap between the chuck surface 16a of the winding drum 16 and the tightening tooth 20. At the lower end of the filamentous specimen TP, the filamentous specimen TP is
A weight 43 which gives a predetermined tension to the is hung.

This state is shown in FIG. 2. First, pressure oil is supplied to the hydraulic cylinder 18 of the upper grip 10 to extend the piston 18a, and between the winding drum chuck surface 16a and the tightening tooth 20, the filamentous sample T
Hold P. Next, after the transport mechanism (not shown) releases the filamentous sample TP, the hydraulic motor 14 is rotated to move the inner ring 12
Is rotated counterclockwise in the drawing to bring it to the state shown by the chain double-dashed line in FIG. At this time, the filamentous sample TP becomes as shown by the chain double-dashed line.

The inner ring 12 of the lower grip 30 is rotated 180 degrees in the clockwise direction C from the state of the two-dot chain line in FIG. 2 to the position of FIG. 3, and pressure oil is applied to the hydraulic cylinder 18 of the lower grip 30 at that position. The filamentous sample TP is supplied and clamped between the tightening teeth 20 and the winding drum chuck surface 16a. This is the state shown in FIG.
At this time, the filamentous sample TP passes through the axes of the load shaft 41 and the fixed shaft 42, so that the eccentric load does not act on the filamentous sample TP during loading, and an accurate tensile test can be performed.

The present invention is not limited to the configuration of the embodiment as long as the winding drum and the tightening teeth that are in contact with each other are rotatable.
Therefore, instead of pressing the winding drum 20 with the hydraulic cylinder 18 against the chuck surface 16a of the winding drum 16, the winding drum 20 may be pressed with pneumatic pressure or spring force. Further, instead of the hydraulic motor 14, a rotary cylinder may be used, or an actuator that moves linearly may be used to convert the motion into rotary motion.

G. Effect of the Invention As described above, since the present invention is configured so that the winding drum and the tightening teeth that are in contact with each other can be rotated, the thread-like specimen is automatically attached to the winding gripping tool by using a simple transport mechanism. It becomes possible to do.

[Brief description of drawings]

1 (a) and 1 (b) show a winding type gripping tool according to the present invention, (a) is a front view showing a part in section, (b) is a side view showing a part in section, FIG. 2 is a front view showing a state in which the thread sample is inserted between the winding drum and the tightening teeth, and FIG. 3 is a view showing a state in which the thread sample is attached to the winding type gripping tool. 4 and 5 are diagrams for explaining a conventional example. 10: Upper grip, 11: Outer ring 12: Inner ring, 14: Hydraulic motor 14a: Motor output shaft 15: Key, 16: Winding drum 18: Hydraulic cylinder, 18a: Piston 20: Tightening tooth, 30: Lower grip 41 : Load axis, 42: Fixed axis

Claims (1)

[Scope of utility model registration request] 1. A holding body which is rotated by a rotation driving means, a winding drum which is arranged on the holding body and around which an end portion of a filamentous sample is wound, and a holding body which is opposed to the winding drum. Between the winding drum and the tightening tooth, and a tightening / disconnecting means for separating and contacting the winding drum and the tightening tooth with each other to grip and release the filamentous specimen between them. A winding type gripping tool, characterized in that the holding body rotates and the filamentous sample is wound around the winding drum in a state where the filamentous sample is inserted through.