JPH0647621Y2 - Large device gripping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention mainly relates to a gripping device for a positioner for large workpieces.

Conventional technology In welding and assembling work, a work piece having a large weight and shape is attached to a positioner. Sixth
The figure is a front view of the positioner 1. A rotary table 3 is provided on the support frame 2. FIG. 7 is a front view showing the conventional gripping device 4. In the figure, 5 is a chuck plate of the gripping device 4, 6 is a claw part, 7 is a holding plate, 8 is a bolt member, 9 is a large member, 10 is a flange part to be gripped by the large member 9, and 11 is a large member 9. It is a stand used when gripping.

Next, the configuration of the conventional gripping device 4 will be described. The chuck plate 5 is provided with a plurality of lead screws (not shown) and claw portions 6 in the radial direction, respectively, and by rotating the lead screws, the claw portions 6 are moved in the axial direction of the lead screw to be large-sized. The chuck device is formed so that the outer peripheral portion of the flange portion 10 of the member 9 can be gripped. And further,
The lower surface side of the flange portion 10 is tightened by the holding plate 7 and the bolt member 8 so that the large member 9 does not fall off.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the gripping device of the prior art, when the large member is gripped, the outer peripheral portion of the flange portion is gripped by the claw body, and the holding plate and the bolt member are prevented from falling off. The flange was tightened. Since the above-mentioned bolt member tightening is manually performed by the operator, the tightening work requires a lot of time and labor.

This invention solves the above-mentioned problem, and when the outer peripheral portion of the flange portion of a large member is grasped by the claw portion of the grasping device, the lower surface side of the flange portion can be automatically tightened by another grasping claw. The purpose is to provide.

Means for Solving the Problems The means of the present invention taken to solve the above problems are as follows. A gripping pin is provided on the lower side of the lead screw of the claw portion so as to be parallel and slidable with the lead screw, and the gripping pin is biased by a spring member toward the center of the chuck. Providing an inclined notch that inclines with respect to the sliding direction, b. On the other hand, a drive pin for a gripping claw is provided in a vertical direction orthogonal to the grip pin, an inclined portion is provided near the center of the drive pin so as to be in contact with the inclined cutout portion, and a spring member is fitted on the upper end side of the drive pin. The drive pin downwardly, and the gripping claw is pivotally supported on the lower end of the drive pin, and the rear end of the gripping claw and the lower end of the claw body are connected via a link plate. When gripping a large member having a flange part, the tip of the grip pin of the claw part can contact the outer periphery of the flange part, and the lower surface of the flange part can be tightened with the grip claw by the upward movement of the drive pin. Set and configured.

Action a. The chuck plate is provided with a plurality of lead screws and claw portions in the radial direction. When gripping a large-sized member, first, the lead screw is rotated to simultaneously move the pawl body toward the chuck center. The claw part moves, and the tip of the gripping pin provided on the claw part abuts the outer periphery of the flange part of the large member. However, even after the gripping pin is stopped, the pawl body continues to move until the stepped shoulder of the gripping pin abuts the stepped portion of the pawl body. Then,
The inclined notch of the gripping pin is moved rearward relative to the claw body. Therefore, the inclined portion of the drive pin that is in contact with the inclined cutout portion of the grip pin is lifted upward.

B. As in the above item (a), the drive pin moves upward against the spring force of the spring member. As a result, the tip of the grip claw portion is rotated upward with the link plate as the fulcrum side.
Here, since the tip of the gripping claw is set in advance so as to abut on the lower surface side of the flange portion of the large member, the gripping claw clamps and fixes that position. As a result, the outer peripheral portion of the flange portion is automatically tightened with the tip of the gripping pin, and the lower surface side is automatically tightened with the gripping claw.

C. When the gripping device is released from the large-sized member, if the operations are performed in the reverse order of the items a and b, the claw body and the gripping pin move backward and the tightening claw also releases the flange lower surface side tightening. .

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing a state in which a large member 9 is gripped by a gripping device 12 according to the present invention. FIG. 2 is a detailed view of essential parts showing a state before the gripping operation of the gripping device 12 is started. In the figure, 5 is a chuck plate, 13 is a base,
14 is a claw body, 15 is a lead screw for moving the claw body 14, 16 is a lead screw 15
A hydraulic motor for driving, 17 is a height positioning block fixed to the chuck plate 5, 18 is a grip pin, and 19 is a grip pin.
Reference numeral 18 is an inclined cutout portion, 20 is a drive pin, 21 is an inclined portion of the drive pin 20, 22 is a grip claw, 23 is a link plate, and 24 and 25 are spring members, respectively. 3 is a side view seen from A in FIG. 2, FIG. 4 is a view seen from B in FIG. 2, and FIG. 5 is a detailed view of a C portion in FIG.

Next, the configuration of the gripping device 12 according to the present invention will be described with reference to FIG. On the lower side of the lead screw 15 of the claw body 14, the lead screw
A gripping pin 18 is provided so as to be parallel to and slidable with 15, and the gripping pin 18 is biased by a spring member 24 in the chuck center direction, and the gripping pin 18 is inclined with respect to the sliding direction of the gripping pin 18. The inclined notch portion 19 is provided. On the other hand, a drive pin 20 is provided in a vertical direction orthogonal to the grip pin 18, an inclined portion 21 that contacts the inclined cutout portion 19 is provided near the center of the drive pin 20, and a spring is provided on the upper end side of the drive pin 20. Member 25
To urge the drive pin 20 downward, and the grip claw 22 is pivotally supported by the pivot pin 26 at the lower end of the drive pin 20.
The rear end portion of the grip claw 22 and the lower end portion of the claw portion body 14 were connected via a link plate 23. When the large member 9 having the flange portion 10 is held, the holding pin 18 of the claw portion body 14 is held.
The tip (a) can be brought into contact with the outer peripheral portion (b) of the flange portion (10), and the flange portion is moved by the upward movement of the drive pin (20).
The lower surface side C of 10 was set so that it can be tightened by the grip claws 22.

Next, the function and function of the gripping device 12 according to the present invention will be described. The chuck plate 5 is provided with a plurality of lead screws 15 and claw portions 14 in the radial direction.
When gripping the large member 9, first, the lead screw 15 is rotated to simultaneously move the claw portion 14 toward the chuck center. The claw body 14 moves and the gripping pin 18 provided on the claw body 14 is moved.
The tip a of the above-mentioned contact with the outer peripheral portion b of the flange portion 10 of the large member 9. However, even after the grasping pin 18 is stopped, the claw portion body 14 continues to move until the stepped shoulder d of the grasping pin 18 contacts the stepped portion e of the claw portion body 14. Then, the grip pin 18
The inclined notch portion 19 is moved rearward relative to the claw portion body 14. Therefore, the inclined notch of the grip pin 18
Since the inclined portion 21 of the drive pin 20 that is in contact with 19 is lifted upward, the drive pin 20 moves upward against the spring force of the spring member 25. As a result, the link plate 23 is pivoted upward to the tip of the grip claw 22 with the link plate 23 as the fulcrum side. Here, since the tip of the grip claw 22 is preset so as to abut on the lower surface side position c of the flange portion 10 of the large member 9, the grip claw 22 fixes the position by tightening. As a result, as shown in FIG. 5, the outer peripheral portion of the flange portion 10 is automatically tightened by the tip a of the gripping pin 18 and the lower surface side c thereof is automatically tightened by the gripping claw 22.

When the gripping device 12 is released from the large-sized member 9, if the gripping operation is performed in the reverse order, the claw portion 14 and the gripping pin 18 move backward and the gripping claw is moved.
Tightening of the lower surface of the flange portion 10 by 22 is also released.

Effect of the Invention In the gripping device of the prior art, when gripping a large-sized member, the outer periphery of the flange is gripped by the claw body, and the flange is secured by the holding plate and the bolt member so that the large-sized member does not fall off. I was tightening. Since the above-mentioned bolt member tightening is manually performed by the operator, the tightening work requires a lot of time and labor.

However, in the gripping device according to the present invention, the claw part is provided with the gripping pin having the inclined notch, the drive pin having the inclined part facing the inclined notch, and the gripping claw for tightening the lower surface side of the flange part. When the outer peripheral portion of the flange portion of the large member is gripped by the claw portion of the apparatus, the grip claw automatically clamps and fixes the lower surface side of the flange portion.

Therefore, the gripping device for a large member according to the present invention does not require manual tightening work by an operator, so that labor saving of the work is realized and the time required for the gripping work is shortened. Enables improvement and cost reduction.

[Brief description of drawings]

FIG. 1 is a front view showing a gripping device according to the present invention, and FIG.
FIG. 3 is a detailed view of the main part of the gripping device of the present invention, FIG. 3 is a side view as seen from A of FIG. 2, and FIG. 4 is a view as seen from B of FIG.
FIG. 5 is a detailed view of portion C of FIG. 1, FIG. 6 is a front view of the positioner, and FIG. 7 is a front view showing a conventional gripping device. 4,12 …… Grip device 5 …… Chuck plate 6,14 …… Claw body 9 …… Large member 10 …… Flange 15 …… Lead screw 18 …… Grip pin 19 …… Inclined notch 20 …… Drive Pin 21 …… Inclined part 22 …… Grip claw 23 …… Link plate

Claims (1)

[Scope of utility model registration request] 1. A chuck plate is provided with a plurality of lead screws and claw portions respectively in a radial direction, and the lead screws are rotated to move the claw portions in the axial direction of the lead screw. In a chuck device configured to grip the outer peripheral portion of the flange portion of, the gripping pin is provided below the lead screw of the claw portion so as to be slidable in parallel with the lead screw, and the gripping pin springs in the chuck center direction. The gripping pin is biased by a member, and the gripping pin is provided with an inclined notch inclined with respect to the sliding direction of the gripping pin, while the gripping claw drive pin is provided in the vertical direction orthogonal to the gripping pin. An inclined portion facing the inclined notch is provided near the center of the drive pin, and a spring member is fitted on the upper end side of the drive pin to urge the drive pin downward, and the lower end of the drive pin is grasped. Nail When supporting a large member having a flange portion by connecting the rear end portion of the grasping nail and the lower end portion of the nail portion body via a link plate, the tip of the grasping pin of the nail portion body is connected to the outer peripheral portion of the flange portion. A gripping device for a large member, characterized in that the gripping claw is set so that the lower surface side of the flange portion can be tightened by upward movement of the drive pin.