JPH0418755Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a nut feeding device for a nut runner that supplies nuts to a nut runner.

(Conventional technology) Automatic nut tightening machine (hereinafter referred to as nut runner)
When attaching a predetermined workpiece to an assembly, the problem is how to supply nuts to this nut runner.

As a conventional device for supplying nuts to a nut runner, one disclosed in Japanese Utility Model Application Laid-open No. 61-89473 is known. This is shown in FIGS. 14 to 16, in which a guide member 210 is pivotally supported on a support shaft 201 of a base 200 via a spring member 202.
and a fourteenth one disposed along the guide member 210.
The nut runner 220 is movable vertically in the figure. A nut conveying path 211 and a nut holding part 212 are provided at the upper part of the guide member 210 that protrudes above the nut runner 220, and a guide groove 214 is provided at the lower part of the nut holding part 212. That is, when the rod 221 of the nut runner 220 is inserted through the guide groove 214 into the threaded hole of the nut N of the nut holding part 212, the tip of the socket part 222 pushes the slope 210a of the guide member 210, so that the guide member 210 As shown in the figure, the arms 213, 213 of the nut holding section 212, which are elastically biased inward by the spring member, open as shown in Fig. 16, and the nut N
is supplied to the nut runner 220.

(Problems to be Solved by the Invention) In the above conventional technology, the guide member 2 that is paired with the nut runner 220 is provided in the vicinity of the nut runner 220.
10 etc., therefore, when a plurality of nut runners are arranged in the head of the workpiece assembly jig, the device becomes larger and the guide member 21
There was a problem in that the nut runner 220 could not be placed in the required position of the assembly jig head because the nut runner 220 was an obstacle.

The present invention has been developed to solve the above-mentioned problems.The purpose of the present invention is to make the nut supplying device rotatable, so that it can be disposed near the nut runner only when necessary, and can be used to supply nuts to the nut runner. To provide a nut feeding device for a nut runner, which increases the degree of freedom in arranging a nut runner by eliminating interference between devices, and also reduces the size of the device.

(Means for solving the problem) A means for solving the above problem is to have a socket part that can move back and forth freely, and a slidable rod is biased to protrude from the tip of the socket part. A nut supply device that supplies nuts to a plurality of nut runners includes a main body in which a nut conveyance path for holding and moving nuts is formed, and an end portion of the main body that is provided so as to be openable and closable, and is elastically biased in the closing direction by a spring member. a plurality of nut cartridges each having an opening/closing member that forms a narrow width portion in the nut conveyance path; and rotating the nut cartridges forward and backward of the nut runner to open and close the nuts in the opening/closing member of the nut cartridge. The nut supply device of the nut runner is constituted by a rotating device which opens and closes the opening/closing member by engaging the rod of the nut runner to supply nuts to the nut runner.

(Function) By rotating the opening/closing member of the nut cartridge in front of the nut runner and moving the nut runner toward the opening/closing member, the nut runner can be moved to the nut positioned in the narrow width part of the nut conveyance path of the opening/closing member. The rod can be engaged. Next, by rotating the nut cartridge to the rear of the nut runner, the opening/closing member is pressed by the nut engaged with the rod of the nut runner and opens against the elastic force of the spring member, so that the nut can be removed from the nut runner. It can be taken out.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the attached FIGS. 1 to 13.

FIG. 1 is a perspective view showing the entire automatic assembly device for an exhaust manifold W (hereinafter referred to as a work), and C is an assembly and conveyance line for an engine E mounted and fixed on a pallet Pa. A workpiece W is positioned and fixed at a predetermined position on this assembly conveyance line C for assembly. Reference numeral 1 denotes an automatic workpiece assembling device of a jig head exchange type, and the main body of this device is fixed on a base 3 that was previously disposed facing the engine E. The main body of the apparatus includes a workpiece gripping station _S1 that grips a workpiece W positioned at a predetermined position on a workpiece delivery line F;
An assembly station _S2 is provided for assembling the gripped workpiece W onto the engine E in front.
The two stations S ₁ and S ₂ are continuously connected by upper and lower annular rails 4, 4.

Two assembly jig heads ₂ , 2 having exactly the same function of positioning, gripping and assembling the work W are supported on the outer peripheral sides of the annular rails 4, 4 of each of the stations S1, _S2 , respectively. The assembly jig heads 2, 2 are slid on annular rails 4, 4 by an indexing device 5, and are freely movable alternately between a workpiece gripping station _S1 and a workpiece assembly station _S2 . In this embodiment, the assembly jig heads 2 and 2 have exactly the same function, but it goes without saying that one of the assembly jig heads may have a different function.

The annular rails 4, 4 in the workpiece assembly station _S2 are movable rails 4a, 4a, and the rails 7, 4 of the base 3 are moved by a moving device (not shown).
Together with the slide base 6 sliding on the workpiece assembly station _S2 , the assembly jig head 2 located at the workpiece assembly station S2 can be moved toward the engine E in front.

In addition, the workpiece W consists of a flange part WF to be attached to the engine E, a stay part WS, a tubular part WP, etc. In this workpiece W, the flange part WF is divided into two parts, and three pieces are attached around each side, for a total of six pieces. bolt holes WF-1, WF-2, WF-3... are formed, and bolt holes WS-1, WS-2 for mounting are formed in the stay part WS.

This workpiece W is fixed with its flange portion WF and stay portion WS placed on a pallet P as shown in FIGS. 4 to 6. The part of this pallet P on which the flange part WF is placed has a thick wall that partially stands up, and its both sides are slightly thinner to create gaps PS, PS between it and the flange part WF of the workpiece W. is forming.

Incidentally, the front mounting bolts B, B are inserted into the stay part bolt holes WS-1, WS-2, and the heads of the mounting bolts B, B are supported by the stay part WS.

Next, the basic structure of the assembly jig head 2 will be explained with reference to FIGS. 2 to 4.

The assembly jig head 2 consists of a support frame 10, a tilting cylinder 11, a flange part nut runner 50, a stay part nut runner 70, a jig body 14, a clamp holding device 20 for the workpiece W, etc. Upper and lower back brackets 10 supported by the upper and lower annular rails 4, 4 are provided on the rear surface of 10a.
f, 10g are fixed. Guide rollers 12, . . . guided to both sides of the annular rails 4, 4 are attached to the back brackets 10f, 10g, and support rollers 13, . installed,
The entire assembly jig head 2 is supported slidably along annular rails 4, 4.

The support frame 10 has upper and lower support plates 1 on its front side.
A fixing plate 10b is provided via 0c and 10d, and the fixing plate 10b has a workpiece flange portion WF.
Six flange nut runners 50a for tightening;
50b, 50c, ... and the nut supply device 60 that supplies nuts to these, and the work stay section WS.
Three stay nut runners 70a, 7 for tightening
The respective drive units 72, 0b, 70c, . . . are fixed. Further, tilting cylinders 11, 11 are pivotally supported on the support frame 10, and the rods 11
The tip of a, 11a is the rear arm 1 of the jig main body 14
4e and 14e.

The jig main body 14 has approximately L-shaped left and right side plates 14a,
14a, an upper plate 14c connecting between the side plates 14a, 14a, a connecting plate 14b, etc.
a, left and right bearings 14d fixed to the lower part of 14a,
Lower support plate 1 of the support frame 10 via 14d
It is pivotally supported by a fixed shaft 15 installed and fixed between 0d and 10d. The bearings 14d, 14d are provided with rods 11a, 11a of the tilting cylinders 11, 11.
Since the arms 14e and 14e to which the jig is pivoted are fixed, by pulling in the rod 11a of the tilting cylinder 11, the jig main body 14 is rotated from the vertical state shown in FIG. 2 to the horizontal state shown in FIG. be able to. In this case, the socket portions 71, . . . of the stay portion nut runner 70 are separated from the driving portions 72, .

A work clamp holding device 20 consisting of a backup plate cylinder 22, a backup plate 21, a clamp device 30, a positioning device 40, etc. is assembled on the top of the jig main body 14.
The workpiece W can be positioned and held on the backup plate 21. The backup plate cylinder 22 is fixed to the upper plate 14c of the jig main body 14, and the tip of the rod 22a is a movable member 2 that is installed and fixed between the guide members 23, 23.
It is connected to the central part of 5. Note that the guide member 23 includes the upper plate 14c and the side plate 14 of the jig main body 14.
It is slidably fitted into guide bars 24, 24 fixed vertically via support members 14f, 14f of a, 14a.

Further, the moving member 25 is connected to the backup plate 21 via a support shaft 26, rotating plates 27, 27, etc.
The clamp device 30 and the positioning device 40 are fixed to the backup plate 21.

Here, the procedure for assembling the workpiece W onto the jig main body 14 will be explained. When the workpiece W fixed on the pallet P is positioned on the workpiece gripping station _S1 , the jig main body 14 is moved by the tilting cylinders 11, 11.
horizontally above the workpiece W as shown in Figure 4,
After that, the workpiece W is raised together with the pallet P, and the socket part 7 of the stay part nut runner 70a, 70a is
1,71 is the tightening bolt B of the work stay part WS,
At the same time, both ends of the backup plate 21 are slid into a predetermined position and inserted into the gaps PS, PS between the work W and the pallet P via the backup plate cylinder 22. Next, the workpiece W is positioned on the backup plate 21 by the positioning device 40, and the workpiece W is gripped and positioned on the jig main body 14 by pressing the workpiece flange portion WF against the backup plate 21 using the clamping device 30. be able to. In this case, the back-up plate 21 is provided with a rectangular notch 21a at the central end of the workpiece W side so as not to cover the bolt holes WF-1, . Notches 21b, 21b are provided.

When the pallet P and workpiece W are engaged in the above state, the jig main body 14 is moved by the tilting cylinders 11, 11.
Then, the workpiece W may be moved vertically toward the engine E for assembly as shown in FIG.

Next, the flange nut runner 50 according to the present invention
7 to 1 regarding the nut supply device 60
This will be explained in detail with reference to FIG.

Six flange nut runners 50 are installed 50a, 50b, 50c, . . . at positions facing the six bolt holes WF-1, .
The workpiece flange portion WF is tightened with a nut N to the mounting bolt of the engine E which is positioned and fixed on the front pallet Pa. The nut supply device 60 supplies tightening nuts N to these flange nut runners 50.

The flange nut runner 50 consists of a front socket part 51 and a rear power transmission part 52 for rotating the socket part 51. Power transmission section 52
The front fixing part 53 is fixed to the movable plate 57 and the rear fixing part 5 is fixed to the fixing plate 10b of the support frame 10.
A sliding part 54a that can freely slide inside the front part fixing part 53 is connected to the rear part fixing part 54. Since a spring member 55 is installed between the front and rear fixing parts 53 and 54, the front fixing part 5
3 and a socket portion 5 rotatably connected thereto.
1 is elastically biased to the left in FIG. 7 together with the moving plate 57.

The socket portion 51 is provided with a rod 56, a nut engaging portion 51a, etc., and the rod 56 can be inserted into the screw hole of the tightening nut N.
The socket portion 51 is elastically biased in the axial direction by a spring member (not shown) so as to protrude forward. The movable plate 57 is movable back and forth by a movable cylinder 58 and guide members 59, 59 (only the front view of which is shown in FIG. 8) attached to the fixed plate 10b, and is connected to the six flange nut runners 50a. ，
Drive section 52 of..., front fixing section 53 of...
By moving back and forth, these socket portions 51, . . . can be moved forward and backward at the same time.

The nut supplying device 60 is composed of a rotating cylinder 61, arm members 62, 62, a nut cartridge 64, etc. The rotating cylinder 61 is arranged so that its rod 61a is tilted forward and upward to the support frame 1, as shown in FIG.
It is attached to the fixed plate 10b of the rod 6.
The tip of 1a is pivotally attached to the lower end of one of arm members 62, 62 arranged as a pair on the left and right. The arm member 62 has a substantially doglegged shape and is tilted upward rearward, and the corners of the doglegged shape are pivotally supported on the fixed plate 10b via the support pin 63a and the support member 63, so that the rotation cylinder The upper portions of the arm members 62, 62 swing back and forth around the support pin 63 as the rod 61a of the arm member 61 moves forward and backward.

The nut cartridge 64 holds a plurality of tightening nuts N, and is horizontally attached to the connecting member 65 fixed between the arm members 62, 62 by the number (6) of the flange nut runners 50a, . . . It is being As the arm member 62 swings to the left in FIG.
As shown in FIG. 9, the lengths of the six nut cartridges 64a, 64b, . . . from the connecting member 65 are adjusted according to the positions of 0a, .
Therefore, for example, the nut cartridge 64a is inserted into the bolt hole WF-1 or WF-3 of the workpiece flange portion WF.
The nut cartridge 64b has a bolt hole.
This is for WF-2.

A nut conveying hole 101 passes through the main body 100 of the nut cartridge 64, and the nut conveying hole 101 is connected to a nut take-out part 110. 101a. The nut extraction part 110 is connected to the support pins 111, 1 of the main body bottom plate 100a.
11, and a closing spring 113 that biases the opening/closing member 102 in the closing direction. The opening/closing members 112, 112 form the nut conveying hole 101 and the narrow width part 101a in the closed state, and also insert the socket rod of the flange nut runner 50 into the threaded hole of the nut N engaged with the narrow width part 101a. 56 can be inserted through the engagement hole 114
is formed. Note that a semicircular groove is also formed in the main body bottom plate 100a facing the engagement hole 114.

Natsu N to Natsu cart cartridge 64a,...
Although the supply means for the nuts is not shown, a predetermined nut supply tube or the like is connected to each nut cartridge 6.
4a, . . ., and the nuts N, .

Here, the action of the nut supply device 60 on the flange nut runner 50 will be explained. Since the nut supply device 60 rotates from the standby position T to the front of the flange nut runner 50, it must be activated when the jig main body 14 is in a horizontal position where it is not disposed in front of the flange nut runner 50.

First, by pulling in the rod of the movable cylinder 58 and moving the movable plate 57 toward the fixed plate 10b of the support frame 10, the socket portion 51 of the flange portion nut runner 50 is slightly retracted. And the rod 61a of the rotation cylinder 61 of the nut supply device 60
is pulled in, the nut cartridge 64 is turned 90 degrees, and the nut take-out part 110 is positioned just in front of the socket part 51 of the flange part nut runner 50. After that, the moving plate 5 is moved by the moving cylinder 58.
7 to its original position, the socket rod 56 of the flange nut runner 50 is inserted into the engagement hole 114 of the nut take-out portion 110 of the nut cartridge 64 and the threaded hole of the nut N. Next, the rod 61a of the rotary cylinder 61 is moved forward to return the nut cartridge 64 to the standby position T.
In this case, nut N has flange part nut runner 5.
Since the rod 56 of 0 is engaged, the opening/closing members 112, 112 of the nut take-out part 110 are closed and the spring 11 is closed.
The nut supplying device 60 returns to the standby position T with the open nut N remaining in the rod 56 against the elastic force of 3. In this state, the nut N has been supplied to the flange nut runner 50.

Next, the overall operation of the device will be explained.

First, the workpiece W positioned at the workpiece gripping station S1 shown in FIG. ₁ is positioned and gripped by the jig main body 14 of the assembly jig head 2. In this case, it is necessary to rotate the jig main body 14 to a horizontal position as shown in Fig. 4, but for this purpose, it is necessary to separate the connecting part 73 of the stay part nut runner 70 using a predetermined device. At the same time, it is necessary to supply the tightening nuts N, .

Next, the assembly jig head 2, which has positioned and gripped the workpiece W, is rotated along the annular rails 4, 4 to the workpiece assembly station _S2 by the indexing device 5. The assembly jig head ₂ supported by the movable rails 4a, 4a of the workpiece assembly station S2 is moved together with the slide base 6 toward the front engine E, and is moved to the bolt hole of the workpiece flange portion WF.
Workpiece W is supported by engine E by partially inserting WF-1, ... into the mounting bolt of engine E.

Next, the clamping of the work W by the clamp device 30 and the positioning of the work W by the positioning device 40 are released, and the backup plate 21 is moved from the work W by the backup plate cylinder 22. When the mounting jig head 2 is further moved toward the engine E, the rods 56 of the flange nut runners 50a, . , socket member 5
The tightening nuts N held in the lower right engaging portions 51a, . . 1, . . . are pressed against the mounting bolts of the engine E. Also, at this time, it is assembled to the work stay part WS, and the stay part nut runners 70a, 70
The mounting bolts B and B, whose heads are engaged with the bolts B, are pressed into the mounting screw holes of the engine E.

Then, when the flange part nut runners 50a, . . . and the stay part nut runners 70a, 70b are rotated and the workpiece W is attached to the engine E, the assembly jig head 2 is moved backward, and the workpiece gripping station _S1 is moved again and the same operation is performed. repeat. There are two assembly jig heads 2, so while one is positioning and gripping the workpiece W at the workpiece gripping station _S1 , the other one is positioning and gripping the workpiece W at the workpiece assembly station _S2 . It can be assembled to engine E.

(Effects of the invention) Since the nut cartridge of the nut supply device is rotatably supported forward and backward relative to the nut runner, the nut supply device does not become an obstacle to the nut runner, and the head of the workpiece assembly jig is A plurality of nut runners can be freely disposed on such a nut runner mounting device. Furthermore, since nuts can be automatically supplied to the nut runner by the rotation of the nut cartridge, there is no need for a device such as a nut supply tube that guides the nuts to the socket of the nut runner, and the device can be made smaller and more compact. .

[Brief explanation of drawings]

Fig. 1 is a perspective view of the automatic exhaust manifold assembly device, Fig. 2 is a side view showing the main structure of the assembly jig head, Fig. 3 is a front view of Fig. 2, and Fig. 4 is Fig. 2 5 and 6 are a plan view and a side view of the exhaust manifold placed on a pallet, and FIG. 7 is a partially detailed side view of the assembly jig head. Fig. 8 is a front view of Fig. 7, Fig. 9 is a front view of the nut cartridge, Figs.
The sectional views taken along the line CC in the figure and FIGS. 14 to 16 are diagrams showing the prior art. In the drawing, 2 is an assembly jig head, 50 is a flange nut runner, 51 is a socket, 56 is a rod, 60 is a nut supply device, 61 is a rotating cylinder, 64 is a nut cartridge, and 100 is a nut cartridge. The main body, 101 is a conveyance path, 101a is a narrow width part, 112 is an opening/closing member, 113 is a spring member,
N is Natsuto.

Claims (1)

[Scope of Claim for Utility Model Registration] A nut feeding device that supplies nuts to a plurality of nut runners having a socket portion that can move forward and backward, and having a slidable rod protrudingly biased from the tip of the socket portion. a main body in which a nut conveyance path for holding and moving the nut is formed;
a plurality of nut cartridges each having an opening/closing member that forms a narrow width portion in the nut conveyance path by elastic biasing in a closing direction by a spring member; A nut feeding device for a nut runner, characterized in that it has a rotation device that opens and closes the opening/closing member by engaging the rod of the nut runner with the nut in the opening/closing member of the cartridge, thereby supplying nuts to the nut runner. .