JPH01172609A - Tentative joining device of divided connecting rod - Google Patents

Abstract

PURPOSE:To shorten the length of a transport line by arranging a positioning device, cap clamping device, large edge part side clamping device, and a bolt pressing device onto a turntable for mounting the tentative assembly body of a divided connecting rod and installing a nut fastening device outside the turntable. CONSTITUTION:The tentative assembly body A of a divided rod is revolution- transported by a turntable 10, and the tentative assembly body A is position- fixed by a positioning device 4, and press-fixation onto the rod part 1 of a cap part 2 by a clamping device 5, press-fixation of both sides of a large edge part (a) by a side clamping device 6, and the pressing into the holes of the connecting bolts 3 and 3 by a bolt pressing device 7 are carried out. The bolts 3 and 3 are tentatively joined by using the fastening nuts 9 and 9 by a nut tightening device 8. Therefore, the tentative assembly process of the divided connecting rod and the tentative joining process are divided, and the need of connecting a transport lines, independently by both processes, is obviated, and the length of the transport line can be shortened.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a split connecting rod in which a rod part and a cap part, which are split at the large end, are connected by tightening a nut to a connecting bolt that passes through both. The present invention relates to a coupling device, particularly to a device for temporarily coupling a rod portion and a cap portion in order to finish the circumferential surface of a hole in a large end of a split connecting rod.

(Prior Art) Conventionally, the process of finishing the circumferential surface of the hole at the big end of this type of split connecting rod that connects with the crankshaft was carried out in the eighth step.
As shown in Figure A, first, the joint surfaces of the rod part 1 and the camp part 2, each having a predetermined portion processed, are made to face each other, and the small end of the rod part 1 is positioned and fixed by the positioning device 4. As shown in FIG. 8C, through the idle process shown in FIG.
.

The connecting bolt 3. is inserted into the hole 1a by the bolt pushing device 7.
3, and then, as shown in Figure 8, the cap part 2 is communicated with the connecting bolt 3.3 by the cap clamp device 5 and temporarily assembled with the rod part 1,
Then, as shown in FIG.
are pressed and fixed from both sides, and then the connecting bolt 3.3 is tightened with the nut 9.9 using the device 8 to temporarily connect the split connecting rods, and through the idle process shown in FIG. As shown in Figure G, the processes of finishing the peripheral surface of the large end a and discharging it to the next process as shown in Figure 8H are linearly connected.

However, in the above process, each process from the initial positioning and fixing to the dispensing process is provided independently, and each process is performed continuously, so it is necessary to In order to adjust the timing of continuous conveyance, a standby process, which is an idle process, as shown in FIGS. 8C and F is required, and the conveyance line space has to be lengthened. In addition, the travel time between each process increases, making it difficult to improve work efficiency.Furthermore, since equipment for each process is installed separately, costs increase considerably. there were.

(Problems to be Solved) In order to solve this inconvenience, the present invention requires that the temporary assembly process and the temporary connection process of the split connecting rod be separated, and that the two be independent so that the conveyance line is continuous. Temporary coupling allows the length of the conveyor line to be shortened, and processes from temporary assembly of the split connecting rod to finishing of the circumferential surface of the hole at the large end can be completed in a shorter line space than before, in a shorter time and at lower cost. The purpose is to provide equipment.

(Means for Solving the Problems) In order to achieve the above object, the temporary coupling device according to the present invention connects the rod portion and the cap portion, which are split at the large end, into holes drilled in the ear portions on both sides of the rod portion and the cap portion. a positioning device for positioning the temporarily assembled connecting rod and fixing the rod portion on a turntable on which the temporarily assembled divided connecting rod is placed, the connecting rod being temporarily assembled by communicating the pair of connecting bolts; a cap clamp device that presses and fixes the cap portion to the rod portion after positioning and fixing the temporarily assembled body; a large end side clamp device that presses and fixes the cap portion and the rod portion from both sides; and a bolt pushing device for pushing the connecting bolt into the hole after pressing and fixing the rod part from both sides, respectively arranged at a predetermined angular section in the rotation direction of the table, Furthermore, after the connecting bolt is pushed in by the pushing device, a nut tightening device is provided for tightening the bolt with a nut at a position outside the turntable facing the bolt.

(Function) In this means, the temporarily assembled divided connecting rod is rotationally conveyed by the turntable, the positioning device positions and fixes the connecting rod in a predetermined conveyance angle section, and the cap clamp device positions and fixes the connecting rod in the camping section. pressing and fixing both sides of the large end using the side clamp device, and further pushing a connecting bolt into the hole using the bolt pushing device;
Temporary connection is achieved by tightening the bolt with the nut by the nut tightening device.

Furthermore, in a preferred configuration of the means, the turntable is rotatably mounted on a fixed base and is rotatable about a support shaft, and the positioning device, cap clamp device, large end side clamp device, and bolt pushing device are provided. , each of the turntables is provided with the interlocking member, the other end of each interlocking member is provided with a cam roller, and each cam roller is connected to a respective cam groove carved in the base, In each of the devices, the actuating member operates in a predetermined conveyance angle section of the turntable as the table rotates.

(Example) Hereinafter, one example of the apparatus according to the present invention will be described based on the drawings.

FIG. 1 shows a temporary joining device for performing the above-mentioned temporary joining of split connecting rods, machining the circumferential surface of the hole in the large end, and discharging the split connecting rods to the next process on a circular turntable 10.

The temporary connection device connects the temporary assembly A of the divided connecting rods to the first
The rod part 1 and the cap part 2 are placed on the station, and while being rotated 90 degrees and conveyed to the second station, the rod part 1 and the cap part 2 are positioned and fixed by the positioning device 4, the cap clamp device 5, and the large end side clamp device 6. The bolt 3.3 is pushed in by the bolt pushing device 7.

After that, the turntable 1 is placed at the second station.
The bolts 3, 3 are temporarily connected with nuts 9, 9 by the nut tightening device 8, which is provided outside the vehicle.

Next, at the third station where the material was rotated 90 degrees,
The chamfering tool f and the deburring tool g attached to the pedestal d are lowered along the guide e and are brought into contact with the circumferential surface of the hole in the large end a and the oil hole C, respectively, for finishing machining, and then further cut at 90 degrees. At the fourth station where it is rotated and conveyed, it is delivered to the next process.

Next, FIG. 1 shows the configuration of the positioning device 4, cap clamp device 5, large end side clamp device W6, bolt pushing device 7, and nut tightening device 8, which are the main parts of the present invention in this temporary coupling device. ~Details will be explained using Fig. 6.

FIG. 2 shows a temporary assembly A of connecting rods placed on the first station shown in FIG. 1, and 11 is the positioning device 4.
The positioning pin is connected to one end of the first interlocking member S1 that constitutes the positioning pin.

The positioning pin 11 extends vertically from the turntable 10 by a first interlocking member S1 and a first cam mechanism 1 to be described later, and can be freely fitted into and removed from a hole in the small end of the rod portion 1.

Further, 12 is a pressing member connected to one end of the second interlocking member S2 constituting the cap clamp device 5, and the pressing member 12 is connected to the second interlocking member S2 and a second interlocking member S2, which will be described later.
The cam mechanism 2 allows the turntable 10 to freely reciprocate in the radial direction.

Further, 13 is a clamp rod connected to one end of the third interlocking member S3 constituting the large end side clamp device 6, and 13a is a large end portion of the temporary assembly A of the clamp rod 13 and connecting rod. The reference block, which is the support member, is fixed to the turntable 10 that holds the a.

The clamp loft 13 is guided by a guide member 13b by a third interlocking member S3 and a third cam mechanism 3, which will be described later, and is capable of reciprocating toward the reference block 13a.

Further, 14.14 is the bolt pushing rod connected to one end of the fourth interlocking member S4 constituting the bolt pushing device 7 and axially aligned with the bolts 3, 3, respectively. It is guided by a guide groove 14b of the support block 14a by a fourth interlocking member S4 and a fourth cam mechanism 4, which will be described later, and is capable of reciprocating in the radial direction of the turntable 10.

Note that 15 is a jig plate through which the positioning pin 11 is inserted and for attaching the reference block 13a, guide member 13b, support block 142, etc.;
is removably attached to the turntable 10 by an attachment member 15a having an angular cross section as shown in the third figure, and is replaced depending on the shape of the connecting rod temporary assembly A.

Next, the configuration of the positioning device 4 will be further explained.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1 mentioned above,
As shown in the third figure, the upper part of the first interlocking member S1 constituting the positioning device 4 is provided with a groove 16 having a roughly U-shaped cross section, and the lower part of the positioning pin 11 is fitted into the groove 16. are connected.

Further, the intermediate portion of the positioning pin 11 is slidably inserted into a cylindrical support member 17 that communicates the quotient of the turntable 10 and the jig plate 15 in the vertical direction.

Further, an intermediate portion of the first interlocking member S1 is slidably inserted into a vertical cylindrical guide portion 10a provided on the turntable 10, and furthermore, a lower portion of the member S1 is provided with the first cam roller 18. is attached.

The first cam roller 18 is integrally attached to the base B,
It is connected to a first cam groove 20 carved in a cylindrical cam block 19 coaxial with the support shaft C of the turntable 10 .

Therefore, the first cam mechanism described above is comprised of the first cam groove 20 and the first cam roller 18.

Further, the base B is fixed and bearings 21.21
The turntable 10 is slidably supported through the .

Therefore, while being supported by the base B, the turntable 10 is rotated around the support shaft C via the bearings 21 and 21 by a drive device (not shown).

Therefore, when the turntable 10 rotates around the support shaft C, the positioning pin 11 and the first interlocking member S1 rotate together with the table 10, and the first interlocking member S1 at the lower end of the member S1 rotates.
A cam roller 18 moves up and down along a first cam groove 20 provided in a block 19 that is integral with the base B that is fixed on the side.

Therefore, while rotating together with the turntable 10, the positioning pin 11 moves up and down according to the cam profile of the first cam groove 20 via the cam roller 18 and the first interlocking member S1 in a predetermined rotation angle section of the table 10. , from the table 10.

Next, the configuration of the cap clamp device 5 will be explained.

In FIG. 4, the second interlocking member S2 constituting the cap clamp device 5 meshes with a rotating arm 22 connected to the lower part of the pressing member 12 and a binion part 22a provided at the lower part of the arm 22. The sliding member 23 has a rack portion 23a that has a rack portion 23a.

Further, the second cam roller 24 is connected to the other end of the sliding member 23, and the cam roller 24 is connected to the upper base B.
The second cam groove 26 is connected to the second cam groove 26 formed in a hollow disk-shaped cam block 25 coaxial with the support shaft C of the turntable 10 that is integrally attached to the turntable 10 .

Therefore, the second cam mechanism 2 described above is composed of the second cam roller 24 and the first cam groove 2.6.

Furthermore, the intermediate portion of the sliding member 23 is slidably guided by a cylindrical guide portion 10c extending in the radial direction of the table 10 at the peripheral edge 10b of the turntable 10.

Therefore, when the turntable 10 rotates around the support shaft C, the rotating arm 22 and the sliding member 23, which constitute the pressing member 2 and the second interlocking member S2, rotate together.
Further, the second cam roller 24 at the end of the interlocking member S2 is reciprocated in the radial direction of the turntable 10 along a second cam groove 26 provided in a cam block 25 that is integral with the fixed base B. .

As a result, the sliding member 23 reciprocates with the movement of the second cam roller 24, and the pinion portion 22a meshes with the rack portion 23a of the sliding member 23, and the center axis of the pinion portion 22a is rotated. rotate around.

Therefore, while rotating together with the turntable 10, the pressing member 12 moves through the second cam roller 24 and the second interlocking member S2 according to the cam profile of the second cam groove 26 in a predetermined rotation angle section of the table 10. The turntable 10 reciprocates in the radial direction.

Next, the configuration of the large end side clamp device 6 will be explained.

In FIG. 2, the third interlocking member S3 constituting the large end side clamp device 6 is a clamp arm 27 whose one end is connected to the end of the clamp rod 13 on the opposite side to the side where the reference block 13a exists. , a rotation shaft 28 that pivotally supports the other end of the clamp arm 27 and is vertically inserted through the turntable 10 , and another rotation shaft 28 that has one end pivotally supported on the lower end of the rotation shaft 28 . It is composed of an arm 29.

Further, the third cam roller 30 is connected to the lower part of the other end of the rotating arm 29 as shown in FIG.
0 is the cam block 2 integrally attached to the base B.
The third cam groove 31 is connected to the third cam groove 31 carved in the groove 5.

Therefore, the third cam mechanism 3 described above is composed of the third cam roller 30 and the third cam groove 31.

Therefore, when the turntable 10 rotates around the support shaft C, the clamp rod 13 and the third interlocking member S3 rotate together, and the third cam roller 30 connected to the end of the interlocking member S3 is fixed. It is guided along the cam profile of the third cam groove 31 provided in the cam block 25 which is integrated with the base B.

As a result, the rotary link 29 is moved to the third cam roller 30.
rotates around the rotating wheel 28 with the movement of the
Further, the clamp arm 27 rotates together with the rotating wheel.

Along with this, the clamp rod 13 is supported by the support block 13b fixed on the jig plate 15 according to the rotation of one end of the clamp arm 27, and the large end a of the connecting rod is held together with the reference block 13a. grasp.

Next, the configuration of the bolt pushing device 7 will be explained.

The fourth interlocking member S4 constituting the bolt pushing device 7 is connected to the bolt press-fitting rod 14 as shown in FIGS. 5 and 6.
, 14 respectively.
It is composed of a sliding plate 32 having a shape, and a connecting member 34 connected to the lower part of the sliding plate 32.

Further, the sliding plate 32 forms a space 15b between the jig plate 15 and the guide rail 15 inside the space 15b.
Slide on c.

Further, the fourth cam roller 3 is provided at the bottom of the connecting member 34.
5 are connected, and the cam roller 35 is connected to the fourth
It is connected to the cam groove 36.

Therefore, the aforementioned fourth cam mechanism 4 consists of the fourth cam roller 35 and the fourth cam groove 36.

Therefore, when the turntable 10 rotates around the support shaft C, the bolt press-fit rods 14, 14 and the fourth interlocking member S4 rotate together, and the fourth cam roller 35 at the end of the interlocking member S4 is fixed. It is guided along the cam profile of the fourth cam groove 36 provided in the cam block 25 which is integrated with the base B.

As a result, as the fourth cam roller 35 moves, the sliding plate 32 moves to the jig plate 15 via the connecting member 34.
The turntable 10 reciprocates in the radial direction of the turntable 10 while being guided by a guide rail 15c through a space 15b provided therein.

Along with this, the bolt press-fitting rod 14°14 is guided through the support portion 32a of the sliding plate 32 into the guide hole of the support block 14a attached to the jig plate 15 in the radial direction of the turntable IO. It moves back and forth.

Further, the nut tightening device 8 is disposed on the circumferential side of the turntable 10 at the second station shown in the first figure,
Rotating rods 8a, 8a each having a nut 9.9 at its tip, which is screwed into the tip of the bolts 3, 3, extend toward the tip of the bolts 3, 3 in the radial direction of the turntable 10. .

Next, in this temporary coupling device, the positioning device 4, the cap clamp device 5, the large end side clamp device W6,
The operation of the bolt pushing device 7 will be explained in detail with reference to FIG.

FIG. 7 shows the first to fourth cam grooves 20 in each of the above devices.
．． The positioning pin 11.degree. pressing member 12.26, 31.36 moves by the first to fourth cam rollers 18.24.degree.30.35 via the first to fourth interlocking members 81.about.S4, respectively. Clamp rod 1
3 and bolt press-fit rods 14, 14 are shown in order from the inside.

Further, in FIG. 7, the angle shown at the outermost circumference of the circumference indicates the rotation angle of the turntable 10, particularly 0 degrees, 9 degrees,
The positions at 0 degrees, 180 degrees, and 270 degrees are the first station, second station, third station, and fourth station in the temporary coupling device shown in the first diagram, and each station is a temporary assembly of split connecting rods. A is placed on the jig plate 15, positioned and fixed, the bolt 3.3 is temporarily connected at the nut 9°9 by the nut tightening device 8, and then the circumferential surface of the hole in the large end a is finishing processing,
Furthermore, delivery to the next process is performed.

First, the positioning pin 11 of the positioning device 4 is divided from the jig plate 15 at the 0 degree rotation angle position of the turntable 10, and has already been raised to the uppermost position and protruded by the cam profile of the cam groove 20. Position and fix by fitting the hole in the small end of the connecting rod to the temporarily assembled body.

At this time, the pushing member 12 in the cap clamp device 5 is moving toward the cap portion 2 by the cam profile of the cam groove 26, and the clamp rod 13 of the large end side clamp device 6 and the bolt pushing device 7
The bolt pressing rod 14.14 of is inactive.

Thereafter, the positioning pin 11 rotates up to 240 degrees together with the turntable 10 while maintaining the positioning and fixing of the small end of the assembly A.

In parallel with this, the pushing member 12 is connected to the turntable 1.
The rod portion 1 of the cap portion 2 continues to move toward the cap portion 2 while rotating with 0 degrees, and by the time the rod portion 1 of the cap portion 2 rotates 20 degrees
After the pressing is completed, the cap part 2 and the rod part 1 are separated by the positioning pin 11 fitted into the hole in the small end part.
are clamped together, and this cap clamped state is maintained up to a rotation angle of 225 degrees.

Further, the clamp rod 13 of the large end side clamp device 6 continues to be inoperative until the rotation angle is 25 degrees, and then
The reference block 13a is laterally moved toward the reference block 13a by the cam profile of the cam groove 31.
Start clamping the large end a of the connecting rod from both sides with
The clamping is completed at a rotation angle of 45 degrees, and the state of the side clamp at the large end is maintained up to a rotation angle of 250 degrees.

Also, the bolt pushing rod 14 of the bolt pushing device 7.
14 continues to be inactive until 45 degrees, and then from 45 degrees, the turntable 1 is rotated by the cam profile of the cam groove 36.
The rod portion 1 and camp portion of the bolts 3, 3 begin to move toward the outer circumferential side in the radial direction of the bolt 3, and while the base ends 3a, 3a of the bolts 3, 3 are pushed and rotated to 90 degrees, the rod portion 1 and the camp portion of the bolts 3, 3 are Pushing of the ears la and 2a of No. 2 into the holes is completed.

Then, at a rotation angle of 90 degrees, the nut tightening device 8
Tighten the bolt 3.3 with the nut 9.9,
The temporary connection between the cap part 2 and the rod part 1 is completed.

After the temporary connection is completed, the bolt pressing rod 1 is rotated up to 135 degrees.
The bolt 3.3 is kept pressed by 4.14, and then the rod 14.14 is retracted from 135 degrees and reaches the most retracted position at 180 degrees, and the bolts 3, 3 are completely released from being pressed.

Thereafter, at the position of the rotation angle of 180 degrees, the hole in the large end part a of the connecting rod temporary assembly A is machined on its circumferential surface.

Then, when the rotation reaches 225 degrees, the pressing member 12 begins to be retracted by the cam profile, and at 270 degrees, the cap clamp is completely released.

Parallel to this release of the cap clamp, the positioning pin 11 is moved 240 by the corresponding cam profile.
It started to descend from 270 degrees and reached its lowest point,
The positioning and fixing of the small end portion is also released.

Furthermore, the big end side clamp is also completely released while the clamp rod 13 is rotated from 250 degrees to 270 degrees to be retracted by the cam profile.

Thereafter, at 270 degrees, the connecting rod assembly A is delivered to the next process.

When this dispensing is completed, the positioning pin 11 is moved to 27
It rises again to the highest position between 0 degrees and 315 degrees and enters the standby state.

Thereafter, when it rotates to 335 degrees, the pressing member 12 of the cap clamp device 5 begins to move toward the camp 2 side again, and the connecting rod temporary assembly A is placed on the jig plate 15 at the 360 degree position after one rotation. Ru.

Thereafter, the above operation is repeated.

Therefore, according to the above embodiment, the positioning pin 11 of the positioning device 4 and the pressing member 12 of the cap clamp device 5
, the clamp rod 13 of the big end side clamp device 6 and the bolt press-fitting rod 14.14 of the bolt-push device 7,
Each cam groove 20, 26 rotates together with the turntable 10 and is further carved in the base B.
, 31° 36, the positioning and fixing of the small end hole of the rod portion 1 and the cap portion 2 to the rod part 1, gripping and fixing both sides of the large end a, and further pushing the bolt 3.3 into the holes of the ears 1a and 2a of the rod part 1 and cap part 2. As a result, the length of the conveyance line for the temporary joining process of the split connecting rods can be shortened, and furthermore, the line space required for temporarily assembling the split connecting rods and finishing the circumferential surface of the large end hole is shorter than before. Therefore, it is possible to provide a temporary bonding device that can perform processing in a short time and at low cost.

(Effects) Therefore, according to the present invention, the turntable can rotationally transport the temporarily assembled divided connecting rod, and the positioning device positions and fixes the connecting rod in a predetermined transport angle section, and the cap clamp device the cap portion to the rod portion by pressing, the side clamp device to press and fix both sides of the large end, the bolt pushing device to push the connecting bolt into the hole, and the nut tightening device to push the connecting bolt into the hole. Since bolts can be tightened with nuts, the temporary assembly process and the temporary connection process of the split conloft can be separated, and both can be made independent, eliminating the need for a continuous conveyance line and reducing the length of the conveyance line. To provide a temporary coupling device which can shorten the time required for connecting the connecting rods, and can process the process from temporary assembly of the split connecting rods to finishing of the circumferential surface of the hole at the large end in a shorter line space than before, in a short time and at low cost. be able to.

[Brief explanation of the drawing]

FIG. 1 is a plan view of one embodiment of the device according to the present invention, FIG. 2 is a partially enlarged view of FIG. 1, FIG. 3 is a sectional view taken along line mm in FIG. Partial cross-sectional view on the mV-IV line in the figure, No. 5
The figure is a sectional view taken along the line V-V in Figure 2, and Figure 6 is a cross-sectional view taken along the line ■-v in Figure 5.
The sectional view taken along the line R and FIG. 7 are explanatory views of the operation of the apparatus shown in FIG. 1, and FIG. 8 is a schematic process diagram illustrating the conventional apparatus. 1...Rod part 2...Cap part la, 2a...
・Ear portion 3...Pol) 3a...Bolt base end 1゛-ξ゛1゛, - 4...Positioning device 5...Cap clamp device 6...Big end side clamp device 7 ... Bolt pushing device 8... Nut tightening device 9... Nut 10... Turntable 11... Positioning pin 12... Pressing member 13... Clamp rod 14... Bolt press fitting rod 18... First cam roller 20... First cam groove 24... Second cam roller 26... Second cam groove 30... Third cam roller 31... Third cam groove 35... Fourth cam roller 36...Fourth cam groove Sl...First interlocking member S2...Second interlocking member S3...Third interlocking member S4...Fourth interlocking member A...Split connecting rod temporary Assembly B...Base C...Spindle a...Big end b...Small end #I! J2 Figure 3 Figure 5 Figure 6 ■ τn E F Anti-8 Figure (3H 66-

Claims (1)

[Claims] 1. A split connecting rod that is temporarily assembled by communicating a pair of connecting bolts through holes drilled in the ears on both sides of the rod part and the cap part, which are split at the large end. A positioning device that positions the temporarily assembled connecting rod assembly and fixes the rod part on a turntable on which the temporarily assembled assembly is placed; and a positioning device that positions the temporarily assembled connecting rod assembly and fixes the rod part; a large end side clamp device that presses and fixes the cap portion and the rod portion from both sides; and after the cap portion and the rod portion are press-fixed from both sides, the connecting bolt is fixed. A plurality of temporary coupling units each consisting of a bolt pushing device for pushing into the hole are arranged at a predetermined angular section in the rotational direction of the table, and further, after the coupling bolt is pushed by the pushing device, the bolt is inserted into the nut. A temporary connecting device 2 for split connecting rods, characterized in that a nut tightening device for tightening the turntable is provided at a position facing the bolt outside the turntable, and the turntable is rotated by a support shaft on a base fixed to the turntable. The positioning device is provided at one end with a positioning pin that can be freely fitted into and removed from a hole in the small end of the connecting rod, and has a first cam roller at the other end, and is further mounted through the turntable. The first interlocking member includes a first interlocking member that moves with the rotation of the turntable, and a first cam groove that is provided on the base and guides and moves the positioning pin in the vertical direction via the first cam roller and the first interlocking member. ,
The cap clamp device includes a pressing member that presses the cap portion at one end, a second cam roller at the other end, and a second interlocking member that is inserted through the turntable and moves with rotation of the turntable. and a second cam groove that is provided on the base and guides and moves the pressing member toward the cap side via the second interlocking member and the second cam roller, and the large end side clamp device, A clamp rod is provided at one end for pressing the large end in a direction perpendicular to the moving direction of the pressing member, a third cam roller is provided at the other end, and the rod is inserted through the turntable and rotates as the turntable rotates. a third interlocking member that moves; a support member that clamps the large end portion together with the third interlocking member; The bolt pushing device includes a third cam groove that guides and moves toward the end, and the bolt pushing device further includes a bolt pushing rod that presses the base end of the connecting bolt at one end, and a fourth cam roller at the other end. Further, a fourth interlocking member is installed in the turntable and moves with the rotation of the turntable; A temporary connecting device for split connecting rods according to claim 1, characterized in that the device comprises a fourth cam groove that guides and moves toward the base end of the connecting bolt.