KR19990025812A - V-Cal's Drum Base Clamp Jig - Google Patents

Abstract

The present invention is equipped with a simple structure to reduce the manufacturing cost, by achieving a uniform fixed operation using the rotational operation and the elastic force of the spring to effectively prevent the shaking or shaking during the base processing improved V to achieve precise processing of the base Clamp jig for processing drum base of seed (VCR)

The present invention has a cylindrical body fixed to the front block of the base machine, respectively, the rear side of the body casing is formed with a guide groove in the longitudinal direction; The rod has a circular rod-shaped push rod which is slidably mounted inside the casing, and a jaw is mounted at the tip of the push rod, and a length adjusting nut is mounted at the rear end of the push rod, while the rear end of the push rod is the A clamp rod pushed forward by a rod; And a push pin and a front block fitted to the front end of the jaw by being inserted between the front block and the twist bearing of the length adjusting nut on the outer side of the casing and the clamp rod, and supporting the length adjusting nut to the rear side at all times with respect to the front block. It provides a clamp jig for processing a drum base of a V-C (VCR) comprising; elastic spring to be fixed between the fixing pins mounted on the base. The present invention has a clamp rod that is rotatable by a guide groove formed by the casing while moving back and forth by the elastic cylinder and the pusher cylinder to be fixed by the spring of the same elastic force.

Description

V-Cal's Drum Base Clamp Jig

The present invention relates to a clamp jig for processing a base drum for supporting upper and lower drums of a VCR, and more particularly, has a simple structure to reduce manufacturing costs, and uniformity using a rotational operation and elasticity of a spring. The clamping jig for drum base machining of VCR (VCR) is improved to achieve the precise machining of the base by effectively preventing the shaking or shaking during the base machining by performing a fixed operation.

Generally, the base for fixing the upper and lower drums of the VCR is mounted to the drum assembly 100, as shown in FIG. 6, and the drum assembly 100 is used for image tracking of videotape. Rotatable through the bearing 124 to the upper drum 110, which is rotated by a drum motor (not shown), and the shaft 130 press-assembled through the center of the upper drum 110; The lower drum 120 is assembled, and the upper and lower drums 110 and 120 are mounted on the drum base 150 to be assembled with a predetermined inclination angle at the drum receiving portion of the deck plate 160.

In addition, a plurality of heads 112 protrude to the outer circumferential surface of the lower surface of the upper drum 110, and a rotary transformer rotor 141 electrically connected to the head 112 is installed below the center. The lower drum 120 is provided with a rotary transformer stator 142 having a predetermined distance from the rotary transformer rotor 141, and a flexible printed circuit board (not shown) is provided at the rotary transformer stator 142. And are electrically bonded and connected. In addition, the lower side of the through-assembled shaft 130 is provided with a preload boss 123 for applying a predetermined preload to the built-in bearing member 124 to perform a stable one-way rotation of the upper drum 110 do.

The base 150 used in the drum assembly 100 as described above should be accurately processed into a desired shape through a base processing machine, but the base mounting clamp jig used in a conventional base processing machine has a structure for mounting the base 150. Complicated, because it does not achieve a uniform fixing operation when mounting the base 150, vibration or shaking occurs during the machining of the base 150, the precision processing of the base 150 can not be achieved, resulting in a large number of defective products, etc. It was to have a problem.

The present invention has been made to solve the above problems, the object of the present invention is to provide a simple structure to reduce the production cost, and to stably fix the base on the processing machine to effectively prevent shaking or shaking during the base processing base It is to provide a clamp jig for drum base processing of VCR (VCR) improved to achieve the precise processing of, to improve the work productivity accordingly, and to prevent the occurrence of defective products.

1 is a plan view showing a drum base processing machine equipped with a clamp jig according to the present invention;

Figure 2 is a cross-sectional view showing a drum base machine equipped with a clamp jig according to the present invention;

3 is a side view of a clamp jig for machining a drum base according to the present invention;

4 is a detailed cross-sectional view of a clamp jig for machining a drum base according to the present invention;

Figure 5 is a side view showing the operating state of the clamp jig for machining the drum base according to the present invention;

Figure 6 is a cross-sectional view showing a coupling structure of the upper, lower drum and the base of a typical VCR (VCR).

Explanation of symbols for main parts of the drawings

10 ..... Casing 16 .....

30 ..... clamp rod 32 ..... Jaw

36 ..... Push rod 40 ..... Length adjusting nut

45 ..... thrust bearing 150 .... base

212 .... Front Block

In order to achieve the above object, the present invention, in the clamp jig (Clamp Jig) for fixing the base for supporting the upper and lower drums of the VCR on the base machine, respectively fixed to the front block of the base machine A casing having a cylindrical body, the rear side of the body having guide grooves formed in a longitudinal direction; The rod has a circular rod-shaped push rod which is slidably mounted inside the casing, and the jaw is mounted on the tip of the push rod to form an a-shaped structure, and a screw portion is formed at the rear end of the push rod, and the length adjusting nut is provided on the screw portion. A clamp rod, on which the rear end of the push rod is pushed forward by a rod of the pusher cylinder; And a push pin and a front block fitted to the front end of the jaw by being inserted between the front block and the twist bearing of the length adjusting nut on the outer side of the casing and the clamp rod, and supporting the length adjusting nut to the rear side at all times with respect to the front block. By providing a clamp jig for processing the drum base of the VCR (VCR), characterized in that it comprises; elastic spring to be fixed between the fixing pins mounted on the base.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The drum base processing clamp jig 1 according to the present invention is used to fix the base 150 supporting the upper and lower drums of the V-Cal on the base machine 200. The base machine 200 on which the clamp jig 1 of the present invention is mounted will be described first with reference to FIGS. 1 and 2. The base machine 200 is mounted on the upper side of the turntable 210 a plurality of n-shaped cross-section front block 212 at regular intervals in the circumferential direction, the rear block 215 is paired with the front block 212 To be mounted. Further, on the outside of the turntable 210, various processing devices 220 for processing the base 150 mounted on the front block 212 into a desired shape, for example, a drill processing device, a tapping processing device, and a safer. Various devices such as a shaper device are positioned to surround the base table, and the turntable 210 rotates at an angle to process the base 150 fixed to the front block 212 into a desired shape.

As shown in FIG. 3, the clamp jig 1 of the present invention mounted on such a base processing machine 200 has two upper and one lower sides on the front block 212 of the base processing machine 200, respectively. It has a structure that is fixed at, the front block 212 is fixed to the cylindrical casing 10, respectively, the inside of the casing 10, the clamp rod 30 is mounted to be slidable, the clamp rod ( A jaw 32 is attached to the front end of the 30 to closely contact the base 150 to the front block 212, and an elastic spring 50 which always supports the clamp rod 30 to the rear side with respect to the casing 10. Equipped) In addition, one pusher cylinder 70 is mounted to the rear block 215 paired with the front block 212 and mounted on the turntable 210, for each clamp jig 1 of the present invention. The cylinder 70 does not constitute the present invention but is used as a power source for operating the clamp jig 1 of the present invention.

The clamp jig 1 of the present invention has a cylindrical body 12 in which the casing 10 is fixed to the front block 212 of the base machine 200, respectively, as shown in FIG. The guide groove 14 of the die | dye is formed in the longitudinal direction at the back side of 12. As shown in FIG. In addition, the body 12 has an annular stepped portion 16 formed on the front side of the outer circumferential surface, and a male threaded portion 18 is formed on the outer circumferential surface on the rear side of the stepped portion 16, and the male screwed portion 18 The fixing nut 20 is screwed, and thus the casing 10 is the front block 212 is positioned and fixed between the step 16 and the fixing nut 20.

On the other hand, the guide groove 14 of the type is that one side end and the other end has a torsion angle θ of approximately 40 to 60 ° in the circumferential direction of the casing 10 will be described later in the guide groove 14 It has a structure in which the guide protrusion 35 of the clamp rod 30 is inserted.

In addition, the clamp rod 30 mounted to the inside of the casing 10 to be slidable has a circular rod-shaped rod 33, and a jaw 32 is mounted on the tip of the rod 33 to form a-shaped structure. Equipped with. The jaw 32 has an upper end portion fixed to the push rod 33 as a screw 32a, and a lower end portion is heat-treated toward the front block 212 side to integrally mount a push pin 36 having a strong material. The push pin 36 has a conical cross-sectional structure, which corresponds to a fixed pin 212a mounted on the front block 212 to press the base 150. In addition, a screw portion 38 is formed at the rear end of the push rod 33, and the length adjusting nut 40 is screwed to the screw portion 38, while the length adjusting nut 40 is a set screw 42. It is fixed by, and has a structure in which the thrust bearing 45 is mounted on the front outer peripheral surface of the length adjusting nut (40). In addition, a guide protrusion 35 into which the head portion 35a is inserted into the shape guide groove 14 of the casing 10 is mounted at the center portion of the push rod 33, and the guide protrusion 35 is a push rod. It consists of a screw member screwed to the center of the 33, the head portion 35a is fitted into the guide groove 14 and movable along the guide groove 14, the clamp rod 30 is casing When the guide rod 35 moves forward and backward within the guide groove 14, the clamp rod 30 rotates about 40 to 60 ° in the circumferential direction of the casing 10. will be.

In addition, by pressing the length adjustment nut 40 with respect to the front block 212 always to the rear side push pin 36 mounted on the front end of the jaw 32 and the fixing pin mounted to the front block (212) ( The elastic spring 50 for fixing the base 150 between the 212a is casing between the fixing nut 20 in close contact with the front block 212 and the twist bearing 45 of the length adjusting nut 40. 10 and the outside of the clamp rod 30, the front end is supported on the rear side of the fixing nut 20, the rear end is in close contact with the front race of the thrust bearing 45, the clamp rod against the casing 10 The support 30 is always elastically supported to the rear side. In this state, the elastic spring 50 supports the clamp rod 30 by pushing it to the rear side, so that the free rotation of the clamp rod 30 is possible due to the thrust bearing 45.

When the clamp jig 1 of the present invention configured as described above is intended to mount the base 150 to the front block 212 using the same, as shown in FIG. 5, the jaw 32 of the clamp rod 30 ) Is in the state shown by the dotted line. In this case, the clamp rod 30 is maintained in an advanced state with respect to the casing 10, which is operated by the pusher cylinders 70 respectively positioned on the rear side of the clamp jig 1 of the present invention to operate the rod ( When 72 respectively pushes the rear end of the push rod 33 to the front side, the length adjusting nut 40 of the push rod 33 pushes the elastic spring 50 through the thrust bearing 45, the elastic spring 50 The compression rod 30 is advanced in the casing 10 while being compressed, and the head portion 35a of the guide protrusion 35 is the guide groove 14 of the casing 10 during the advancement of the clamp rod 30. Guided by the clamp rod 30 is to advance while rotating 40 to 60 ° in the casing (10). Accordingly, the jaw 32 is also rotated by the rotation of the clamp rod 30 to maintain the rotated state as shown by the dotted line in FIG.

And, as described above, when the jaw 32 is rotated and the fixing pins 212a of the front block 212 are exposed, the worker is respectively attached to the three fixing pins 212a (two upper and one lower side). Insert the base 150 to be processed, it is fixed to the front block (212). In this case, the rods 72 of the plurality of pusher cylinders 70 mounted on the rear block 215 are operated to retreat. When the rod 72 is retracted, the jaws 32 are elastic springs 50. As the restoring force of the clamp rod 30 is reversed in the casing 10 and rotates at the same time, the pressing pin 36 is firmly mounted between the base 150 and the fixing pin 212a. In this process, the clamp rod 30 is rotated while reversing the inside of the casing 10, and at this time, the head 35a of the guide protrusion 35 is guided by the guide groove 14 of the casing 10, thereby clamping the clamp rod ( The rotation of the 30 is induced, and the clamp rod 30 is freely rotated by the thrust bearing 45, of course.

On the other hand, if you want to adjust the tension of the elastic spring 50 in the fixing process of the base 150 as described above, the position of the length adjusting nut 40 is screwed to the rear end of the clamp rod 30 The tension of the elastic spring 50 can be adjusted appropriately by moving on the threaded portion 38.

Therefore, as described above, when the jaws 32 of the clamp rod 30 fix the base 150 at three places, respectively, the restoring force of the elastic spring 50 is fixed to the jaws 32 through the clamp rod 30. This is delivered and simultaneously presses three places with uniform pressure. This allows the three elastic springs 50 to have the same elastic modulus so that the base 150 can be uniformly in close contact with the fixing pin 212a side of the front block 212.

According to the present invention as described above, the elastic spring for moving while rotating the clamp rod 30 and the clamp rod 30, which is movable in the casing 10 and the casing 10 mounted on the front block 212. By reducing the manufacturing cost by having a simple structure consisting of (50) and the like, by fixing the base 150 on the front block 212 of the machine 200 as a uniform elastic restoring force by the three elastic springs (50) When the base 150 is processed, shaking or shaking is effectively prevented to achieve precise processing of the base 150. Therefore, it is possible to prevent the occurrence of defective products and thereby to obtain the effect of improving the work productivity.

Claims (3)

In the clamp jig for fixing the base 150 supporting the upper and lower drums 110 and 120 of the VCR on the base machine 200, the front block of the base machine 200 ( A casing 10 having cylindrical bodies 12 fixed to 212, respectively, and having a guide groove 14 shaped in a longitudinal direction at a rear side of the body 12; The rod 10 has a circular rod-shaped push rod 33 mounted on the inside of the casing 10 so as to be slidable, and a jaw 32 is attached to the tip of the push rod 33 to have an a-shaped cross-sectional structure, and the push rod ( A screw 38 is formed at the rear end of the rod 33, and the length adjusting nut 40 is mounted on the screw 38, while the rear end of the push rod 33 is attached to the rod 72 of the pusher cylinder 70. A clamp rod (30) installed in front of the pusher cylinder to be driven forward by the front side; And, between the front block 212 and the length adjustment nut 40 is fitted to the outside of the casing 10 and the clamp rod 30, the length adjustment nut 40 to the front block 212 is always rear Elastic spring 50 to secure the base 150 between the pressing pin 36 mounted on the tip of the jaw 32 and the fixing pin 212a mounted on the front block 212 by elastically supporting the side. Clamp jig for processing drum base VRC (VCR) characterized in that it comprises a. According to claim 1, wherein the thrust bearing 45 is mounted on the front outer peripheral surface of the length adjustment nut 40 for the drum base processing of the VCR (VCR), characterized in that configured to enable free rotation of the clamp rod (30) Clamp jig. According to claim 1, wherein the jaw 32 is formed at the lower end of the front block 212 toward the side of the high-pressure push pin 36 integrally formed, the push pin 36 has a conical cross-sectional structure Clamp jig for drum base processing of V-C (VCR), characterized in that the tip is configured to press the base 150 corresponding to the fixing pin (212a) mounted to the front block (212).