JPH0653036U - S-spring chuck device - Google Patents

Abstract

(57) [Summary] [Purpose] S spring 100 is chucked to frame 101
In the device to be assembled into, it is possible to handle a plurality of types of S spring chucks having different lengths. [Structure] A structure is employed in which a plurality of proximity switches detect the movement position of a pair of claw members 11 and 12 that chuck an S spring by pulling it in the extension direction and stop the claw members 11.
Since the claw member 11 can be arbitrarily stopped and positioned, a plurality of types of S springs having different lengths can be chucked.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an S-spring chuck device used for automatic assembly of an S-spring to a frame.

[0002]

[Prior art]

 For example, in a seat mounted on a passenger car, a so-called S spring is stretched around a seat frame arranged inside, so that a seated person is elastically supported and a comfortable sitting feeling is provided.

In the process of manufacturing such a seat, the work of assembling the S spring to the seat frame is automatically performed by an assembling robot (industrial robot).

That is, an S-spring chuck device is attached to the tip of the operating arm of the assembling robot, and one S-spring is chucked from the S-spring supply unit by this chuck device and assembled to the seat frame. I am trying.

The structure of this conventional S spring chuck device will be described in detail. This S spring chuck device includes a pair of claw members that engage with both ends of the S spring and pull the S spring in the extension direction. The claw member is moved by, for example, an air cylinder device to check the S spring, and the S spring is carried to the seat frame by an assembling robot, and the hook between the hook pieces fixed to both sides of the seat frame. It is operated so as to be mounted in a stretched manner on the.

[0006]

[Problems to be solved by the device]

 In this conventional S-spring chuck device, the moving position of the claw member for chucking the S-spring is defined in advance, so that it cannot handle a plurality of types of S-springs of different lengths, that is, one type of S-spring. Only the S spring can be chucked.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a chuck device that can handle a plurality of types of S springs.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, a chuck device for an S spring according to the present invention operates a pair of claw members that engage with both ends of the S spring and pull the S spring in an extension direction to chuck the claw members. The motor is provided as a drive source, and a plurality of detecting means (proximity switch) for detecting the moving position of at least one of the pair of claw members and defining the stop position of the claw members.

[0009]

[Action]

 In the device of the present invention configured as described above, the stop position of the claw member can be arbitrarily determined, so that it can be applied to chucks of a plurality of types of S springs having different lengths.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 shows the chuck device for an S spring according to the present invention as a whole. This chuck device 1 for an S spring has a rotating mechanism portion at the tip of an operating arm 2 of an assembly robot (industrial robot). It is rotatably attached via the. Reference numeral 3 denotes a base frame body of the S spring chuck device 1. The base frame body 3 includes a top plate 4 and side plates 5 and 6 vertically fixed to both end portions of the top plate 4.

Between the side plates 5 and 6 on both sides, two upper and lower guide shafts 7 and 8 are horizontally fixed in parallel, and a movable plate 9 is movably movable along the guide shafts 7 and 8. It is supported. Further, one end of each of the guide shafts 7 and 8 is projected to the outside of the side plate 6, and the moving plate 10 is movably supported by the protruding portion in the same manner as the moving plate 9.

Claw members 11 and 12 for chucking the S spring are symmetrically attached to the moving plates 9 and 10, respectively, that is, formed at the tips of the claw members 11 and 12 as will be described later. The S spring is chucked by engaging the engaging portions 11a and 12a with both ends of the S spring.

The pair of claw members 11 and 12 are adapted to be operated by separate driving mechanisms, that is, first, the driving mechanism of one claw member 11 will be described. Between the side plates 5 and 6 on both sides. A screw shaft 14 is rotatably supported between the upper and lower guide shafts 7 and 8, and a nut portion 15 provided on the moving plate 9 is screwed onto the screw shaft 14. One end of the screw shaft 14 is connected to a motor 16 fixed to the side plate 5, that is, the screw shaft 14 is rotated by the forward and reverse rotation driving of the motor 16, and the moving plate 9 (the claw member 11) is accordingly rotated. Is moved in the directions of arrows a ₁ and a ₂ . On the other hand, the drive mechanism of the other side claw member 12 has an air cylinder device 17 disposed between the side plate 6 and the moving plate 10, that is, the operation of the air cylinder device 17 causes the moving plate 10 (the claw member) to move. 12) has a structure in which it is moved in the directions of arrows b ₁ and b ₂ . The motor 16 and the air cylinder device 17 are operated by a control signal from a control unit (not shown).

The automatic assembly operation of the S spring to the seat frame by the chuck device 1 of the S spring configured as described above will be described. First, the chuck device 1 starts from the S spring supply portion (not shown) Chuck the S spring 100. The chucking operation of the S spring 100 is performed by the robot by engaging the respective engaging portions 11a and 12a of the claw members 11 and 12 of the chuck device 1 with both end portions of the S spring 100 (straight portions inside the terminal portions 100a and 100b). In this state, the motor 16 and the air cylinder device 17 are actuated to move the claw members 11 and 12 in the directions of arrows a ₁ and b ₁ (outward direction), respectively. The portions 11a and 12a are engaged with the both ends of the S spring 100 so as to be hooked to pull the S spring 100 in the extending direction, whereby the S spring 100 is chucked.

With the S spring 100 thus chucked, the chuck device 1 is moved to a predetermined S spring mounting portion of the seat frame 101 by the operation of the robot (the condition shown in FIG. 1). The device 1 is lowered as a whole so that both end portions 100a and 100b of the S spring 100 are hooked on hook pieces 102a and 102b fixed to both sides of the seat frame 101, respectively, and then the motor 16 and the air cylinder device 17 are attached. The S spring 100 is actuated to move the claw members 11 and 12 in the directions of the arrows a ₂ and b ₂ (inward direction) to disengage the engaging portions 11a and 12a from both ends of the S spring 100. It is assembled in a state of being stretched between the pieces 102a and 102b.

In the S-spring chuck device 1 operated as described above, the positioning stroke of the claw member 12 is fixed, while the claw member 11 can select an arbitrary movement stop position and has a length. Different types of S springs can be used.

That is, in this chuck device 1, a plurality of (six in this example) proximity switches 19 a, 19 b, 19 c, 19 d, and 19 d are mounted on a mounting plate 18 fixed across both side plates 5 and 6. 19e and 19f are mounted at predetermined intervals in the moving direction of the moving plate 9, and a dock 20 is provided at the edge of the moving plate 9 so as to face the detection surfaces of the proximity switches 19a to 19f. The dock 20 is configured to detect the moving position of the claw member 11 by being detected by one of the proximity switches 19a to 19f.

The proximity switches 19a to 19f are connected to the control unit, and the movement stop position of the claw member 11 is defined by any two proximity switches set in the control unit according to the length of the S spring 100. To be done.

That is, for example, in the case of a short S spring, the control unit is set to stop the motor 16 when the moving position of the claw member 11 is detected by the two proximity switches 19a and 19b close to the claw member 12. By doing so, the claw member 12 is moved between the two proximity switches 19a and 19b, and a short S spring can be dealt with. In the case of a long S spring, the control unit should be set to stop the motor 16 when the moving position of the claw member 11 is detected by the two proximity switches 19e and 19f separated from the claw member 12. As a result, the claw member 12 is moved between the two proximity switches 19e and 19f, and a long S spring can be accommodated. As described above, in the configuration of the apparatus of this example, five proximity switches 19a to 19f can chuck five types of S springs having different lengths.

The number of proximity switches is not limited to six as shown in this example, and it goes without saying that additional switches may be added depending on the type of S spring.

[0022]

[Effect of device]

 As described above, according to the S-spring chuck device of the present invention, since the claw member for chucking the S-spring can be arbitrarily stopped and positioned, it corresponds to a plurality of types of S-springs having different lengths. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view of an example device.

FIG. 2 is a partially exploded perspective view of the apparatus of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chuck device 11, 12 Claw member 16 Motor 17 Air cylinder device 19a-19f Proximity switch (detection means) 100 S spring 101 Seat frame

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Takagi 3-2-12 Matsubara-cho, Akishima-shi, Tokyo Inside Tachi-S Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A chuck device for an S spring used for automatic assembly of an S spring to a frame, comprising a pair of claw members that engage with both ends of the S spring and pull the S spring in an extension direction for chucking. A chuck device for an S spring, comprising: a drive source for operating the claw member; and a plurality of detecting means for detecting a moving position of at least one of the pair of claw members and defining a stop position of the claw member.