JP2009018379A - Chucking device of bar-shaped member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To securely hold a work without center deviation by slidably storing a chucking member in a chuck storage room and making a spring force directly act on the chucking member. <P>SOLUTION: By opening/closing of the chucking members 5a, 5b following vertical movements of a rod member 16, a space between V grooves 6a, 6b is changed to perform chucking action to the work W. In attaching/detaching movements of the work W, when the rod member 16 is lowered by a driving means, the chucking members 5a, 5b move to the outside by wedging action of an operation piece 19 at the tip, and the space between the V grooves 6a, 6b are spread. Then, the work W inserted from below is arranged between the V grooves 6a, 6b. When the driving means pushing the rod member 16 downward is released, the rod member 16 rises and returns to the original position by an action of a compression spring 20. A space between the chucking members 5a, 5b is narrowed by pressing force of springs 9a, 9b and the chucking members grip the work W via the V grooves 6a, 6b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rod-shaped member chuck device for detachably holding the outer periphery of a rod-shaped member such as a long fluorescent lamp.

  For example, Patent Document 1 discloses a holding device in a baking apparatus for a backlight fluorescent tube. In such a structure, there is a problem that the structure becomes complicated and large, and there is a high risk that the work weight is added in the dropping direction with respect to the holding force of the chuck member and the work is detached.

  Further, as a chuck for holding a cylindrical workpiece, a structure as shown in Patent Document 2 is disclosed. In this structure, a plurality of chuck members having V-shaped grooves are held while being shifted to the left and right at a predetermined interval. However, the structure is similarly complicated and an increase in size is inevitable.

JP-A-9-55164 Japanese Utility Model Publication No. 7-7828

  In Patent Documents 1 and 2, a plurality of chuck members each having a V-groove are arranged in the longitudinal direction of the workpiece, and particularly when holding the workpiece vertically, the V-groove surface of the chuck member is high in the vertical direction. If alignment is not performed with accuracy, the workpiece cannot be reliably held in the actual chucking operation, and the holding force is reduced.

  Further, the left and right chuck members move synchronously, and the center of the workpiece that is always held must be constant. However, in the former known example, the structure is complicated due to the link and lever mechanism. Patent Document 2 does not describe the synchronization means for the left and right chuck members, and even if the V-groove portion is formed with high accuracy, the center position may be shifted due to the processing accuracy of the left and right chuck members. is there.

  The object of the present invention is to solve the above-mentioned problems and enable reliable holding without center misalignment during chucking. Therefore, a rod-shaped member that can safely hold even a work that is a fragile rod-shaped member. An object of the present invention is to provide a chuck device.

  In order to achieve the above object, the technical feature of the chuck device for the rod-shaped member according to the present invention is that V-grooves are formed in the longitudinal direction of the opposing end faces, and inclined guide portions are formed in the vicinity of these V-grooves. And a pair of chuck members which are provided with spring accommodating holes on the respective end surfaces opposite to the V-grooves so that the distance between them can be changed by sliding, and a chuck accommodating chamber which accommodates the pair of chuck members. A workpiece insertion hole is provided through the center of the chuck housing chamber to place the workpiece between the V grooves of the chuck member, and communicates with the spring housing hole of the chuck member in the chuck housing chamber from a position opposed to the outer peripheral surface. A fixed cover member having a screw hole, and a compression member that is inserted into the spring accommodating hole of the chuck member through the screw hole of the cover member and presses in a direction to narrow the interval between the chuck members. And a rod member having a wedge-shaped operation piece that fits between the opposing inclined guide portions of the pair of chuck members at one end and opens and closes the chuck member by a wedge action, and has a shaft portion at the other end. And a driving means for driving the rod member in the longitudinal direction of the shaft portion.

  According to the chuck device for the rod-shaped member according to the present invention, the chuck member is slidably accommodated in the chuck accommodating chamber, and a spring force is directly applied to the chuck member, so that it can be applied to a work such as a fragile fluorescent tube. On the other hand, the reliable holding | maintenance without a center shift can be achieved.

  Further, since the wedge action is used as a mechanism for opening and closing the chuck member, it is possible to apply an action force for reliably performing the opening and closing operation, and to make a structure in which a shift of the center position with respect to the workpiece hardly occurs.

  The present invention will be described in detail based on the embodiments shown in the drawings.

  1 is a longitudinal sectional view of the first embodiment, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB. The fixed cover member 1 includes a chuck accommodating chamber 2 that opens upward, a workpiece insertion hole 3 that penetrates from below to the center of the chuck accommodating chamber 2, and a position in the chuck accommodating chamber 2 that faces the outer peripheral surface. Screw holes 4a and 4b penetrating in the horizontal direction are provided.

  In the chuck housing chamber 2 of the cover member 1, a pair of chuck members 5 a and 5 b made of a substantially rectangular parallelepiped are housed so as to be slidable in the horizontal direction with the distance between them being variable. V-grooves 6a and 6b are formed in the vertical direction on opposite parallel inner surfaces of the chuck members 5a and 5b, respectively, and the joint of the V-grooves 6a and 6b is made to coincide with the central axis of the workpiece insertion hole 3. ing.

  Inclined guide portions 7a and 7b are formed on both sides of each of the V-grooves 6a and 6b, and the inclined guide portions 7a and 7b are inclined so as to increase the distance between the chuck members 5a and 5b. Further, dead end spring accommodating holes 8a and 8b are provided on the outer surfaces of the chuck members 5a and 5b, and these spring accommodating holes 8a and 8b communicate with screw holes 4a and 4b provided in the cover member 1, respectively. Yes. Compression springs 9a and 9b are inserted into the spring accommodating holes 8a and 8b through screw holes 4a and 4b, and are sealed with set screws 10a and 10b. The set screws 10a and 10b can adjust the pressing force of the compression springs 9a and 9b according to their screwing positions.

  A thick cylindrical guide body 11 is mounted on the open end of the chuck housing chamber 2 of the cover member 1, and guide grooves 12 a and 12 b for horizontally moving the chuck members 5 a and 5 b are mounted on the guide body 11. Is formed. Further, a cylindrical rod holding portion 13 is provided on the upper portion of the guide body 11, and a rod member 16 is fitted in a through hole 14 of the rod holding portion 13 through a bearing 15 so as to be movable up and down.

  An upper portion of the rod member 16 is a hollow shaft portion 17 protruding upward from the rod holding portion 13, and a stopper 18 is fixed to the upper portion. Two operation pieces 19 are provided at the lower end of the hollow shaft portion 17, and these operation pieces 19 are fitted to the inclined guide portions 7a and 7b of the chuck members 5a and 5b, respectively. That is, the operation piece 19 is formed in a wedge-like substantially triangular shape having a tapered tip, and the chuck member 5a, 5b pressed by the compression springs 9a, 9b in the normally closing direction is opened and closed by the wedge action by the vertical movement thereof. Has been.

  A compression spring 20 is wound around the hollow shaft portion 17 between the upper end of the rod holding portion 13 and the stopper 18 of the rod member 16, and the rod member 16 is always pushed upward by the urging force of the compression spring 20.

  FIG. 4 is a perspective view of the engagement state between the chuck members 5a and 5b and the operation piece 19 of the rod member 16, and the chuck members 5a and 5b open and close in the horizontal direction following the movement of the rod member 16 in the vertical direction. As a result, the V-grooves 6a and 6b in the center portion perform a chucking action on the workpiece W.

  The rod-shaped member chuck device configured as described above is used by being incorporated into, for example, a hand portion of a transport mechanism of various manufacturing apparatuses in actual use. For example, in the attaching / detaching operation when the work W is a fluorescent lamp, first, when the rod member 16 is lowered by the driving means (not shown) based on the driving signal on the apparatus side, the tilt guide portion 7a by the operating piece 19 at the tip, By the wedge action on 7b, the chuck members 5a and 5b move outward, and the space between the V grooves 6a and 6b is expanded. And the upper end part or intermediate part of the workpiece | work W inserted from the downward direction through the workpiece | work penetration hole 3 is arrange | positioned between V groove | channels 6a and 6b.

  When the driving means that pushes the rod member 16 downward is released, the rod member 16 and the operation piece 19 are raised by the action of the compression spring 20, and the chuck members 5a and 5b are narrowed by the pressing force of the compression springs 9a and 9b. The workpiece W is gripped through the V grooves 6a and 6b. At this time, the pressing forces of the compression springs 9a and 9b are appropriately adjusted according to the positions of the set screws 10a and 10b.

  Then, when the predetermined work is completed, the rod member 16 is driven downward based on a signal on the apparatus side, and the chuck members 5a and 5b are expanded to release the workpiece W.

  FIG. 5 is a configuration diagram of the second embodiment, and the action of the compression spring 20 that drives the rod member 16 is opposite to that of the first embodiment. That is, the structure of the first embodiment is always the chuck closing method, and the structure of the second embodiment is always the chuck opening method.

  The configuration other than the rod member 16 and the rod holding portion 13 is substantially the same as that of the embodiment of FIG. 1, the spring accommodating chamber 22 is provided between the hollow shaft portions 17 of the rod member 16, and the compression spring 23 is the hollow shaft portion 17. Is housed to wind. The compression spring 23 constantly presses the rod member 16 downward through the stopper 21 in the rod holding portion 13, and the chuck members 5a and 5b are in an expanded state against the pressing force of the compression springs 9a and 9b. ing.

  With such a configuration, when the rod member 16 is pulled upward by the driving means, the interval between the chuck members 5a and 5b is narrowed, and the workpiece W is gripped by the V grooves 6a and 6b. It becomes.

  For convenience of explanation, in the embodiment, the rod member 16 is moved up and down. However, the rod member 16 is not limited to up and down, and may be moved in the horizontal direction to insert the workpiece W in the horizontal direction. .

  FIG. 6 is a longitudinal sectional view of an essential part of the third embodiment. Adjustment of the pressing force of the compression springs 9a and 9b in the first and second embodiments is performed by the set screws 10a and 10b. In the third embodiment, instead of the set screws 10a and 10b, spacers 31 and 32 having a predetermined plate thickness are fixed by a retaining ring 33 in a hole portion 4 'penetrating in the chuck housing chamber 2 in the horizontal direction. The pressing force of the spring 9b is adjusted via the spring stopper 34. A similar mechanism is provided for the compression spring 9a.

  The pressing force of the compression springs 9a and 9b can be adjusted by preparing spacers 31 and 32 having a predetermined thickness and replacing them as necessary. Further, the spacers 31 and 32 may be one instead of two. Thus, a means for adjusting and fixing the pressing force of the compression springs 9a and 9b that press the chuck members 5a and 5b is obtained.

1 is a longitudinal sectional view of Example 1. FIG. It is sectional drawing along the AA line of FIG. It is sectional drawing along the BB line of FIG. It is a principal part perspective view. 6 is a longitudinal sectional view of Example 2. FIG. 10 is a longitudinal sectional view of a main part of Example 3. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cover member 2 Chuck accommodation chamber 3 Workpiece insertion hole 4a, 4b Screw hole 5a, 5b Chuck member 6a, 6b V groove 7a, 7b Inclination guide part 8a, 8b Spring accommodation hole 9a, 9b, 20, 23 Compression spring 10a, 10b Set screw 11 Guide body 12a, 12b Guide groove 13 Rod holding portion 14 Through hole 16 Rod member 19 Operation piece 22 Spring accommodating chamber 31, 32 Spacer 33 Retaining ring 34 Spring stopper

Claims (5)

  V-grooves are formed in the longitudinal direction of the opposite end faces, inclined guide portions are formed in the vicinity of these V-grooves, spring accommodating holes are provided on the respective end faces opposite to the V-grooves, and sliding is performed. A pair of chuck members that can change the distance between each other and a chuck housing chamber that houses the pair of chuck members, and the workpiece is positioned between the V grooves of the chuck member through the center of the chuck housing chamber. A fixed cover member having a screw hole communicating with a spring accommodating hole of the chuck member in the chuck accommodating chamber from a position opposed to the outer peripheral surface, and a screw hole of the cover member through the screw hole of the cover member. Fitted between a compression spring that is inserted into each spring accommodating hole and pressed in a direction to narrow the gap between the chuck members, and the inclined guide portions facing the pair of chuck members at one end. A rod member having a wedge-shaped operation piece for opening and closing the chuck member and having a shaft portion at the other end, and a driving means for driving the rod member in the longitudinal direction of the shaft portion. A chuck device for rod-shaped members.   The guide body having a through hole is attached to the opening end of the chuck housing chamber of the cover member, and the shaft portion of the rod member is inserted into the through hole so as to be movable up and down. A chuck device for the bar-shaped member as described.   The chuck device for a rod-shaped member according to claim 2, wherein the chuck member accommodated in the accommodation chamber is guided by a guide portion of the guide body and slides in the accommodation chamber.   The rod-shaped member chuck device according to claim 1, further comprising an urging unit that urges the rod member in one direction at all times.   2. The chuck apparatus for a bar-shaped member according to claim 1, wherein means for applying a predetermined pressing force to the compression spring and detachably fixing the compression spring is provided on the cover member.

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