JPH0570836U - Chuck unit - Google Patents

Abstract

(57) [Abstract] [Purpose] A coil unit is used as an elastically urging means of a supply pipe, and a chuck unit having a simple structure and an inexpensive structure is provided. [Structure] A pair of chuck claws 5 and 5 elastically biased in a direction in which the tip is always closed is assembled to a chuck body 2 in which a rotating driver bit 11 is inserted so that the chuck claws 5 and 5 swing. An automatic fastener component fastening machine in which a hose mounting bracket 7 is fixed perpendicular to the moving surface and obliquely rearward, and a supply pipe 8 is swingably arranged between the hose mounting bracket 7 and the chuck claw 5. A chuck unit 1 in which a coil spring 10 is fitted along the supply pipe 8 between the rear of the supply pipe 8 and the chuck body 2 in the chuck unit. [Effect] A general coil spring can be used, the machining of the chuck body is simplified, and the chuck can be provided at a low cost. Since the spring does not come out of the chuck, no object is hit or caught, the spring is not damaged during handling, and the appearance is good.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is an automatic fastener parts fastening machine for fastening fastener parts such as screws, rivets, and bolts supplied from a parts feeder to a work, and a chuck unit for holding the fastener parts in front of a driver member for each work cycle. Regarding

[0002]

[Prior Art]

 As shown in FIGS. 3 and 4, the conventional chuck unit has a pair of chuck claws 22, 22 elastically biased in a direction in which the tip is always closed, is attached to a chuck body 21 in which a driver bit 11 is inserted. A hose mounting bracket 23 is fixed in a direction perpendicular to the swinging surface of the chuck claws 22 and diagonally rearward, and is connected to the hose mounting bracket 23 in front of the hose mounting bracket 23 so that the hose mounting bracket 23 can swing freely. The supply pipe 24 is assembled, and a holding spring 25 as shown in FIG. 5 is assembled to the chuck body 21 so that the tip of the supply pipe 24 is always located in the chuck body 21, and is elastically biased.

[0003]

[Problems to be solved by the device]

 Since this conventional chuck unit is configured by using the above-mentioned pressing spring, not only the shape of the spring is complicated, but also the processing of the chuck body for mounting the spring is complicated and the chuck unit becomes expensive. .. Furthermore, with this configuration, since the presser spring is located outside the chuck, it is easy for external objects to hit or get caught, and especially in the case of a handy type fastener fastener, the presser spring is easily deformed and damaged during handling. It is also aesthetically unpleasant. The present invention has been devised for the purpose of solving these problems.

[0004]

[Means for Solving the Problems]

 In order to achieve this purpose, a chuck body 2 having a driver bit 11 which is rotated by the rotation of a motor and which is freely inserted therein is provided, and a pair of the chuck body 2 is elastically biased in a direction in which its tip is normally closed. These chuck claws 5 and 5 are arranged, and the hose mounting bracket 7 is fixed perpendicularly to the swinging surface of the chuck claws 5 and 5 and obliquely rearward. In a chuck unit of an automatic fastener component fastening machine in which a supply pipe 8 is swingably arranged, a coil spring 10 is fitted along the supply pipe 8 between the rear of the supply pipe 8 and the chuck body 2. This is the chuck unit 1.

[0005]

[Action]

 The fastener parts, which are supplied one by one from the parts supply machine through the hose fitting 7 and the supply pipe 8 for each work cycle, are guided to the holding holes 6 of the chuck claws 5 and 5, and then the driver bit 11 is inserted into the through holes 3. When advancing inside, the tip of the supply pipe 8 is pushed outward by the driver bit 11. When the fastening is completed and the driver bit 11 retracts, the elasticity of the coil spring 10 immediately restores the original state. In this way, a simple and reliable structure can be obtained with one general coil spring.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 is a chuck unit attached to an automatic screw tightener (not shown), which has a through hole 3 through which a driver bit 11 which is rotated by the rotation of a motor (not shown) is inserted. It has a body 2. The chuck body 2 and the driver bit 11 are integrally advanced to a predetermined position by the operation of an ascending / descending drive source (not shown), the chuck body 2 is stopped at the predetermined position, and then the driver bit 11 is inserted into the through hole 3. It is configured to pass through the inside and advance independently. A pair of chuck claws 5, 5 are opposed to each other on the chuck body 2 and are elastically urged by a spring (not shown) so as to close the tip of the driver bit 11 at a position where the moving path of the driver bit 11 is closed. It can be opened and closed by moving the driver bit 11 forward and backward. Holding holes 6 are formed at the tips of the chuck claws 5 to allow the legs of the screws to be fastened to pass through, so that the screws can be held on the moving path of the driver bit 11. On the other hand, the chuck body 2 has a hose mounting member 7 fixed perpendicularly to the swinging surfaces of the chuck claws 5, 5 and obliquely rearward, and connected by a hose to a component feeder (not shown). It is supposed to do. A supply pipe 8 is arranged in front of the hose fitting 7 so as to communicate with the hose fitting 7 and obliquely intersect the axis of the driver bit 11. The rear end of the supply pipe 8 is axially supported by the chuck body 2. It is freely swingable. Then, between the rear side of the supply pipe 8 and the chuck body 2, spring accommodating holes 4 and 9 are provided along the supply pipe 8 and a coil spring 10 is fitted, and the tip of the supply pipe 8 is always chucked. It is elastically biased so as to be located inside the main body 2. Thereby, the screw supplied through the hose fitting 7 is guided to the holding holes 6 of the chuck claws 5, 5.

The chuck unit 1 is always in the state shown in FIG. 1, and the screws, which are supplied one by one from the component supply machine through the hose mounting bracket 7 and the supply pipe 8 at each work cycle, are chucked by the chuck claws 5, 5. When the driver bit 11 advances in the through hole 3 next, the tip of the supply pipe 8 is pushed outward by the driver bit 11. When the screw tightening is completed and the driver bit 11 retreats, the elasticity of the coil spring 10 immediately restores the state of FIG. Thus, the structure is simpler and more reliable than one general coil spring.

[0008]

[Effect of the device]

 As is apparent from the above-described embodiments, the present invention has a chuck body in which a driver bit that is rotated by the rotation of a motor is inserted so that the driver body is elastically urged in a direction in which the front end is always closed. A pair of chuck claws that are connected to each other, fix the hose mounting bracket perpendicular to the swinging surface of the chuck claw and obliquely rearward, and swing the supply pipe between the hose mounting bracket and the chuck claw. In a chuck unit of an automatic fastener component fastener that is movably arranged, a chuck unit in which a coil spring is fitted along the supply pipe between the rear of the supply pipe and the chuck body. According to this invention, the conventional pressing spring having a complicated shape is not required, and a general coil spring can be used, and the chuck body for mounting the pressing spring can be easily processed and the chuck unit can be inexpensive. Furthermore, since this spring does not protrude outside the chuck, external objects do not hit or get caught, and the spring is not deformed or damaged during handling. It also has the effect of improving the appearance.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view showing a tip portion of an automatic fastener component fastening machine to which a chuck unit of the present invention is attached.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front sectional view showing a front end portion of an automatic fastener component fastening machine to which a conventional chuck unit is attached.

FIG. 4 is a plan view of FIG.

FIG. 5 is a plan view of a conventional presser spring.

[Explanation of symbols]

 1 Chuck Unit 2 Chuck Body 3 Through Hole 4 Spring Storage Hole 5 Chuck Claw 6 Holding Hole 7 Hose Mounting Bracket 8 Supply Pipe 9 Spring Storage Hole 10 Coil Spring 11 Driver Bit

Claims (1)

[Scope of utility model registration request] 1. A chuck body having a driver bit, which is rotated by the rotation of a motor, and is inserted through the chuck body, wherein a pair of chuck claws are elastically biased in a direction in which a tip is always closed. At the same time, the hose mounting bracket is fixed perpendicular to the swinging surface of the chuck claw and diagonally backward, and the supply pipe is swingably arranged between the hose mounting bracket and the chuck claw to fasten fastener parts. A chuck unit of a machine, wherein a coil spring is fitted along the supply pipe between the rear of the supply pipe and the chuck body.