JPH0613809Y2 - Crankshaft loading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a loading device for loading and unloading a crankshaft between a pedestal of a transportation device and a jig portion of a machine tool such as an oil drilling machine.

(Prior Art and Problems Thereof) When machining a crankshaft of an internal combustion engine, for example, when an oil hole is to be bored in a shaft portion of a crankshaft of a straight 6 type engine, the crankshaft is dedicated to an oil hole drilling machine by a carrier device. Of the crankshaft by the loading device to move in and out between the pedestal of the transport device and the work mounting jig of each dedicated oil hole drilling machine, and place an oil hole at a predetermined position of each inter-cylinder shaft part of the crankshaft. Has been drilled.

Since it is difficult to machine the oil hole of the crankshaft by drilling a small diameter long hole that penetrates the shaft part by one drilling process, the oil hole is cut from one wall of the shaft part to approximately the center. After processing to position, crankshaft 180
It is rotated to make a hole in the shaft wall on the opposite side to penetrate the oil hole.

By the way, when a work having a shape like a crankshaft is carried in and out by a loading device, it is possible to carry it in and out while supporting either the shaft portion or the pin portion of the crankshaft.

If the method of supporting the shaft portion of the crankshaft to carry in and out is adopted, there are the following problems.

The center of gravity of the crankshaft is on the centerline of the shaft axis, and when gripping the shaft portion near this center of gravity and carrying in and out the crankshaft, a device is required to keep the posture of the work constant when transferring the work. .

In addition, the jig that fixes the crankshaft to the work table (table) of the oil hole drilling machine is a bush plate, clamper,
It is composed of a brush, a money receiver, a rotation positioning reference, etc., and grips the shaft portion of the crankshaft to fix it to the work table.
When adopting the method of supporting the shaft part and carrying in and out, design the loading arm of the loading device in consideration of avoiding interference with the jig parts mentioned above and not hindering the oil hole processing of the shaft part. However, if the oil holes are processed while the shaft portion is supported by the loading arm, there is a possibility that the mounting position of the loading arm will be limited in space and the mechanism will be complicated.

Therefore, if you do not perform the oil hole machining on the shaft part at a time, but divide the process for each shaft part (phase) and process with multiple dedicated machines, arrange the support parts to avoid interference with the work fixing jig. However, a different loading device is required for each dedicated oil drilling machine.

On the other hand, when adopting the method of carrying in and out by supporting the pin portion of the crankshaft, interference with the fixed jig can be avoided, but if the crankshaft is supported by the loading arm of the loading device during oil hole processing, I can't reverse the crankshaft. That is, as described above, it is difficult to form a small-diameter slotted hole that penetrates the shaft portion by a single drilling process using a drill, and the oil hole is formed from one wall of the shaft portion to a substantially central position of the shaft. After processing up to 80 °, the crankshaft is rotated 180 ° and a hole is machined from the shaft wall on the opposite side to penetrate the oil hole, which requires rotation of the crankshaft. The crankshaft cannot be rotated by supporting the pin.

The present invention was made in order to solve such a problem, and there is no interference with a fixed jig, and it is easy to carry in and out a work between a pedestal of a transfer device and a jig part of a machine tool. Even if the machining of each shaft part of the crankshaft is divided for each shaft part and machining is performed by a plurality of machine tools, each machine tool should be provided with a loading device of the same design. It is also an object of the present invention to provide a crankshaft loading device capable of rotating a work on a work table of each machine tool.

(Means for Solving the Problems) According to the present invention in order to achieve the above-mentioned object, a crankshaft for a straight 6 type engine is carried in and out between a pedestal of a conveyor and a jig part of a machine tool. In the loading device, a tip portion of the loading arm moves along a predetermined locus between a position corresponding to the cradle position and a position corresponding to the jig portion position, and the tip end portion of the loading arm always has a horizontal posture. And a support base that is attached so that it can be held, and that supports two in-phase pin portions of the crankshaft at two positions,
During loading, the loading arm follows the predetermined locus from a standby position set at an intermediate position between the cradle and the jig part, and supports the pin part on the cradle position at the cradle position to support the crank. After lifting the shaft and loading and unloading the crankshaft at the jig portion, the jig portion returns to the standby position and stands by, and at the time of unloading, follows the reverse of the predetermined locus from the standby position, and moves the pin portion at the jig portion. A crankshaft loading device is provided, which is supported by the support base, lifts the crankshaft, unloads the crankshaft at the receiving base position, and then returns to the standby position.

(Function) The crankshaft for a straight 6 type engine has pin portions arranged in the circumferential direction with a phase shift of 120 °. When two pin portions having the same phase are supported on the crankshaft, the center of gravity of the crankshaft is below the supporting portion. The crankshaft can be lifted in a good balance because it passes through the center of the left and right in-phase pin parts, and the two in-phase pin parts are supported by the jig part of the machine tool and the pedestal of the transfer device. It stabilizes the posture of the crankshaft when handed over.

Also, when the pin portion is supported, the loading arm does not interfere with these jigs even if the shaft portion at any position of the crankshaft is fixed to the work table (table) by a jig, and therefore,
The pin is supported even if a series of machining of one crankshaft is performed by multiple machine tools.
It makes it possible to apply a loading device of the same design to each machine tool.

Furthermore, when the loading arm is made to stand by at an intermediate position between the pedestal and the jig during machining of the crankshaft and transportation of the crankshaft by the transport device, interference between the machining unit and the transport unit is avoided, and the crank on the worktable is avoided. Even when it is necessary to rotate the shaft around the axis, the shaft can be rotated without any trouble.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

First, a crankshaft loading device according to the present invention will be described with reference to the drawings (FIGS. 1 to 4).
The loading device 1 includes a jig 6 installed on a crankshaft 3 of a direct type 6 internal combustion engine, a pedestal 70 of a transfer device 7, and tables 53 and 54 of a dedicated drilling machine 5 for drilling oil holes.
The loading device 1 supports the central in-phase pin portions (# 3 and # 4 pin portions) 3a of the crankshaft 3 to carry in and out, and the loading device 1 includes a base 10, a moving base 30, and a loading arm.
The base 10 includes a hydraulic cylinder 40, a hydraulic cylinder 40, and the like. And
The base 10 has a substantially U-shape when viewed from the front, and the side plates 10 are formed along both side edges of a rectangular floor plate 10 a fixed to the bed 51.
b and 10b are installed upright. Side plates 10b, 10b
Have a symmetrical shape, and these front parts (conveying device 7 described later)
The side is called the front. The same shall apply hereinafter) each has a step, and a horizontal plate 10c is bridged between the upper surfaces of the steps. A bracket 10d hangs down at the center of the horizontal plate 10c, and a base end 40a of the hydraulic cylinder 40 is rotatably supported by a locking pin 41 on the bracket 10d.

The moving table 20 is provided with a cylinder block 20a, and at four corners of the lower portion of the side wall of the cylinder block 20a, as is apparent from FIGS. 1 and 2, two locking pieces 20g are provided at the front end on the transfer device 7 side. Two locking pieces 20h, 20h are suspended and fixed to the rear end of the dedicated drilling machine 5 side. It should be noted that FIG. 1 shows the locking pieces 20g, 20h on the left side as viewed from the front view of FIG. 2, and FIG. 2 shows the two locking pieces 20g, 20g at the front end of the movable table 20. It has been forgotten. Among these locking pieces, each locking piece 20g at the front end of the movable table 20 is rotatably locked to each side plate 10b of the base 10 via the arm 12. That is, the locking piece 20
g is attached to one end of the arm 12 by the pin 13
The other end of each is rotatably locked to the side plate 10b by a pin 14. And, each locking piece 20h at the rear end of the moving table
Are rotatably locked to the side plates 10b of the base 10 via the arm plates 16, respectively. That is, the arm plate 16 has a substantially triangular shape, and pins 17 to 19 described later are rotatably fitted to the three corners of the arm plate 16. The pin 17 is the locking piece 20h and the arm plate 16, and the pin 18 is the arm plate 16. The side plates 10b are each rotatably locked. The distance between the pins 17 and 18 is set to be the same as the distance between the pins 13 and 14 of the arm 12. The pin 19 rotatably connects the arm plate 16 and the plate 40c fixed to the tip of the piston rod 40b of the hydraulic cylinder 40.

At the base of the cylinder block 20a, a cylinder bore 20b is bored in the front-back direction (direction intersecting at right angles to the carrying direction of the carrying device 7), and a piston 20c is slidably fitted in the cylinder bore 20b. Piston 20
Both end faces of c face hydraulic pressure chambers 20d and 20e defined by the cylinder bore 20b and the piston 20c, respectively.
A rack 20j is formed along the longitudinal direction on the upper outer wall of the piston 20c, and a pinion gear 21 meshes with the rack 20j.

The pinion gear 21 is housed in a gear chamber 20f formed inside the upper portion of the cylinder block 20a.
1 is rotatably supported by the cylinder block 20a by a rotary shaft 21a that rotates integrally with the shaft 1. The rotating shaft 21a projects outward from the left and right side walls of the cylinder block 20a. The loading arm 30 is composed of a pair of left and right first arms 31 and 31 and second arms 32 and 32, and the base ends of the first arms 31 and 31 project from the rotary shaft 21. It is fixed to the end so as to be integrally rotatable.

The above-mentioned second arms 32, 32 are arranged parallel to the first arms 31, 31 and in front of this, that is, on the side of the transfer device 7 described later, and the base end thereof is the side wall of the cylinder block 20a. A pin is rotatably locked by a pin on the front part and immediately above the piston 20c. The respective tip portions of the first and second arms 31 and 32 are rotatably supported by a support base 35 that always maintains a horizontal posture. A substantially U-shaped groove 35a for supporting the pin portion 3a of the crankshaft 3 is formed on the upper wall of the support base 35.
Are formed.

The transfer device 7 includes the shaft portions 3 between the cylinders of the crankshaft 3.
The crankshaft 3 is sequentially conveyed between a plurality of dedicated drilling machines 5 as shown in FIGS. 3 to 4, each of which has an oil hole b, and is installed in parallel to the rows of these dedicated machines. There is. The transfer device 7 includes a pedestal 70 that supports the shaft portion 3b of the crankshaft 3 at appropriate two positions in the longitudinal direction,
Guide rolls 71 that guide the cradle 70 between dedicated machines,
The guide rolls 71 and 72 and the drive device 73 are mounted on a mounting wall 75 which stands upright in parallel with the row of the dedicated machine described above. The base 70a of the cradle 70 has a plate shape having substantially the same length as the crankshaft 3, and is sandwiched by a large number of guide rolls 71, 72 arranged vertically to be guided between dedicated machines.

Two arms 70b are provided horizontally on the side wall of the base body 70a on the side of the dedicated machine at a predetermined interval in the horizontal direction, and are similar to the U-shaped groove 35a of the support base 35 on the upper wall surface of the arm 70b on the tip side. Groove 7
0c is formed, and the shaft portion 3b of the crankshaft 3 is supported in the groove 70c. A rack 70d is attached to the side wall of the base 70a opposite to the dedicated machine. The motor 73a of the drive device 73 is mounted on the wall surface of the mounting wall 75 opposite to the dedicated machine, and the drive shaft 73b thereof penetrates through the mounting wall 75 and projects toward the dedicated machine side. A pinion gear 73c is spline-coupled to the projecting end of the drive shaft 73b, and the rack 70d described above meshes with the pinion gear 73c. By the engagement of the rack 70d and the pinion gear 73c, the rotational movement of the drive shaft 73b of the motor 73a is converted into a translational movement, whereby the cradle 70 is conveyed between the dedicated machines.

Next, the drilling machine 5 to which the loading device 1 is attached
Will be described mainly with reference to FIGS. 3 and 4.

First, the dedicated drilling machine 5 is, for example, the crankshaft 3
The # 2 and # 5 shaft portions 3b (see FIG. 4) and the chamfering processing of the # 2 and # 5 pin portions 3a (see FIG. 4) are simultaneously performed. The crankshaft 3
Is a shaft portion 3b of # to # 7 in order from the right in FIG.
The pin portion 2a includes # 1 to # 6.

On the bed 51 of the dedicated drilling machine 5, the left and right tables 5 are placed.
3, 54 are placed and fixed at a predetermined interval, and the loading device 1 is placed and fixed at a central position between the tables 53, 54. A jig 6 for mounting and fixing the crankshaft 3 is fixed on the tables 53 and 54 so as to straddle the tables 53 and 54.

The jig 6 is placed and fixed on each of the tables 53 and 54, and
And clampers 61a and 62 for gripping the shaft portion 3b of # 6.
Workpiece support 6 for supporting the shaft portions 3b of a and # 7 from below
5, fixed on the tables 53 and 54, # 2 and #
The brushes 63 and 64 (third part) that press the crankshaft 3 from the front to the drill side from the oil hole drilling part of the five shaft parts.
In the figure, the brush 63 and the clamper 61a are shown),
In FIG. 4, a pusher 67 for pressing the left end surface of the crankshaft 3, a crankshaft rotating device 66, and the like are provided, and the clamper 61a has a gripping finger that bends in a hook shape as shown in FIG. Having, hydraulic cylinder 61
C moves vertically to move the crankshaft # 3 to # 3.
The shaft portion 3b is pressed and fixed to the reference stand 61d and the reference wall 61b. The reference base 61d has a horizontal reference plane that can be switched between upper and lower by horizontally moving in the front-rear direction, and the reference wall 61b is vertically fixed in the vertical direction and fixed at a rear reference position (drill of the crankshaft 3). Side reference position). The clamper 62a also has the same configuration as the clamper 61a and presses and fixes the # 6 shaft portion 3b of the crankshaft 3.

The work cradle 65 serves to determine the axial reference position of the crankshaft 3, and the pusher 67 presses the crankshaft 3 toward the work cradle 65. That is, the air cylinder 67a of the pusher 67 is extended to press the crankshaft 3 toward the pedestal 65 side, and the flange portion provided on the shaft portion of the crankshaft 3 is brought into contact with the side wall of the pedestal 65 to move in the axial direction. Determine the reference position.

The crankshaft rotating device 66 is a shift fork 66a.
After axially extending and engaging the crank arm,
It rotates to rotate the crankshaft 3 on the jig 6 by a predetermined angle. When the crankshaft 3 rotates, the pressing force of the clampers 61a, 62a and the pusher 67 is temporarily weakened.

A table 55 is placed and fixed on a base 51 behind each of the tables 53 and 54, and a biaxial slide head 56 is mounted on the table 55 slidably in the front-rear direction. The slide head 56 is driven by a drive unit 56a to move the table 55, and a drill 57 for drilling oil holes and an end mill 58 for chamfering are attached.

Next, the operation will be described.

In the loading device 1, the piston 20c moves in the front-rear direction by selectively supplying hydraulic oil to one of the hydraulic chambers 20d and 20e from a hydraulic oil supply device (not shown), and accordingly, the rack of the piston 20c is moved. The pinion gear 21 meshing with 20j is rotated clockwise or counterclockwise to swing the first and second arms 31 and 32.

On the other hand, when the rod 40b of the hydraulic cylinder 40 expands and contracts, the arm 12 and the arm plate 16 rotate about the pins 14 and 18, respectively, and the movable table 20 keeps a horizontal posture, and is diagonally upward to the left in FIG. Direction or diagonally rightward and downward, the support base 35 follows a locus (A → B → C → D → E → A) indicated by a thick broken line in FIG. 1 in accordance with the movements of the piston 20c and the hydraulic cylinder 40. Move by following or following the opposite trajectory. That is, the locus C-D and the locus E-B are moved by the movement of the piston 20c between the loci B-C and the locus D-.
Between E, the movable table 20 can be moved by expanding and contracting the arm 12 of the hydraulic cylinder 40. It should be noted that the thick broken line shown in FIG. 1 indicates the locus of the center of the rotation axis of the tip portion of the first arm 31.

First, the rod 40b of the hydraulic cylinder 40 is extended, the piston 20c is moved to a predetermined intermediate position, and the support base 35 is made to stand by at a predetermined standby position (position A in FIG. 1). The standby position A is an intermediate position between the receiving table 70 of the transfer device 7 and the jig 6 on the dedicated drilling machine 5 side. At this position, even if the receiving device 70 moves due to the operation of the transfer device 7, the loading device 1 is supported. It is a position where it does not interfere with the table 35 or the loading arm 30. In addition, the clampers 61a, 61 of the fixed jig 6 are
a, the brushes 63, 64, the pusher 67, etc. are in an open state, and are waiting for the loading device 1 to mount the crankshaft 3 on the jig 6.

In this state, the drive device 73 of the transporting device 7 is operated to transport the crankshaft 3 while supporting it on the pedestal 70 and stop it at a predetermined position in front of the dedicated drilling machine 5.
Next, hydraulic oil is supplied from the hydraulic oil supply device to the hydraulic chamber 20e to move the piston 20c rightward to the limit position, and the support base 35 is moved to the position B shown in FIG. When the rod 40b of the hydraulic cylinder 40 is retracted to the position shown by the solid line in FIG. 1, the arm 12 and the arm plate 16 rotate clockwise about the pins 14 and 18, and the movable table 20 moves. Move to position C diagonally above left. At this time, the support base 35 is under the two pin portions 3a of the same phase in the center of the crankshaft 3 and is slightly raised. The pin portion 3a of the crankshaft 3 of the straight 6 type engine is arranged every 120 ° in the circumferential direction, and the pin portions 3a of # 3 and # 4 in the central portion are formed in the same phase. # 3 and # 4 pin portion 3a
When the workpiece is supported, the center of gravity always passes through the center of the shaft portion 3b and is located below the supporting pin portion 3a, so that the balance during work loading is extremely good.

Next, when hydraulic oil is supplied to the hydraulic chamber 20d by the hydraulic oil supply device and the piston 20c is moved to the left limit position, the loading arm 30 swings and the crankshaft 3 supported by the support base 35 is moved to the jig 6 Is carried in to a predetermined position D which is slightly lifted above the hydraulic cylinder 4 from this state.
When the rod 40b of No. 0 is extended (a state in which the rod 40b is extended by an imaginary line is shown in FIG. 1), the arm 12 and the arm plate 16 rotate counterclockwise about the pins 14 and 18, respectively. The crankshaft 3 moves to the jig 6 immediately after the support base 35 starts moving from the position D to the position E.
It is received by and is reloaded from the support base 35 to a predetermined position on the jig 6. Then, again, hydraulic oil is supplied to the hydraulic chamber 20e to return the piston 20c to a predetermined intermediate position between the right limit position and the left limit position, and the support base 35 on which the crankshaft 3 is loaded and unloaded is moved from the predetermined position E to the above predetermined position. It moves to the standby position A and stands by.

When the support base 35 moves to the standby position A, the air cylinder 67a of the jig 6 expands and the pusher 67 pushes the crankshaft 3 in the axial direction to push the collar portion against the side wall of the work receiving base 65 to move in the axial direction. While determining the reference position,
The shift fork 66a of the crankshaft rotating device 66 extends and engages with the # 1 crank arm to rotate the crankshaft 3 to determine the reference position around the axis. next,
The hydraulic cylinder 61c operates to operate the clampers 61a and 62a.
Moves downward and presses and fixes the shaft portions 3b of # 3 and # 6 of the crankshaft 3 to the reference base 61d and the reference wall 61b, and then the brushes 63 and 64 extend to allow the shaft portions 3b of the # 2 and # 5 shafts 3b to extend. The side wall is pressed to prepare for drilling oil holes with the drill 57.

When the fixing of the crankshaft 3 by the fixing jig 6 is completed, the drive unit 56a operates and the slide head 5
As 6 moves forward, drilling and chamfering by the drill 57 and the end mill 58 are started. The drilling of the oil by the drill 57 is carried out so as to penetrate a position slightly eccentric downward from the center of the shaft portion 3b by a predetermined distance l. The drill 57 is fed, and a hole is drilled to a depth approximately at the center of the shaft portion 3b. When drilling to the depth of the approximate center position is finished, the slide head 56 is once retracted, and the drill 57 is pulled out from the oil hole, and then the brushes 63, 6 are removed.
4, the clampers 61a and 62a, and the air cylinder 67a of the pusher 67 are once loosened slightly, and the shift fork 66a rotates the crankshaft 3 around the axis by a predetermined angle (180 °).
Just rotate. At this time, the reference table 61d is moved forward to mount the shaft portion 3b on the lower reference surface, and the crankshaft 3 is lowered in the vertical direction by a predetermined distance 2l.
After determining the position where the traveling direction of the shaft penetrates the upper position by a predetermined distance 1 from the center of the shaft portion 3b, the pusher 67, the clampers 61a and 62a, and the brush 63,
The crankshaft 3 is fixed by 64. In addition, the crankshaft 3 described above is replaced with the crankshaft rotating device 66.
Support 3 of the loading device 1 when it is rotated by
5 is waiting at the waiting position A. The crankshaft cannot be rotated while the pin of the crankshaft is supported by the loading arm of the loading device. However, in this device, since the support base 35 stands by at the standby position A, the loading device 1 There is no interference with this rotation.

After the crankshaft 3 is fixed again by the fixing jig 6, the drive unit 56a is operated to move the slide head 56 forward to restart the drilling and chamfering by the drill 57 and the end mill 58. Drill 57
Digs an oil hole from the shaft wall on the opposite side, and penetrates this oil hole with the oil hole previously drilled at the approximate center position of the shaft portion 3b. In this way, an oil hole is bored through the position eccentric from the center by a predetermined distance l.

When the oil drilling process and the chamfering process by the dedicated drilling machine 5 are completed, the slide head 56 retracts to the predetermined standby position, and at the same time, the support base 35 of the loading device 1 reverses the trajectory when the crankshaft 3 is carried into the jig 6. , That is, the predetermined standby position A is moved to the predetermined position D via the predetermined position E. The operation of the hydraulic cylinder 40 and the piston 20c at the time of unloading the work can be easily inferred from the above description, and thus detailed description will be omitted. By the time the support base 35 reaches the predetermined position D, the brushes 63, 64 of the jig 6 and the clampers 61a, 62
a and the air cylinder 67a of the pusher 67 are opened, the crankshaft 3 is again supported by the support base 35 and lifted from the jig 6, and moves to the predetermined position C by following the locus shown by the thick broken line in FIG. Then, it is carried out from the drilling machine 5 to the cradle 70 of the carrying device 7. When the crankshaft 3 is transferred to the receiving stand 70 of the transfer device 7, the supporting stand 35 of the loading device 1 further returns to the initial standby position A via the predetermined position B.

Next, the transfer device 7 moves the pedestal 70 on which the crankshaft 3 on which the # 2 and # 5 shafts 3b have been drilled and which has been finished is placed toward the dedicated machine for the next step, and The pedestal equipped with such a crankshaft is moved to a predetermined position in front of the dedicated drilling machine 5, and the same operation as described above is repeated.

In the above-described embodiment, the machine tool was described by taking the drilling machine 5 exclusively used for drilling the oil hole in the shaft portion 3b of the crankshaft 3 and chamfering the pin portion 3a as an example. Of course, the machine tool to which the device is preferably applied is not limited to this.

(Effect of the Invention) As described in detail above, according to the crankshaft loading device of the present invention, the tip portion is located between the position corresponding to the position of the pedestal of the transfer device and the position corresponding to the position of the jig portion of the machine tool. The loading arm includes a loading arm that moves along a predetermined locus and a support base that is attached to the tip of the loading arm so that it can always maintain a horizontal posture and that supports two in-phase pin portions of the crankshaft at two positions. At the time of loading, follows the predetermined locus from a standby position set at an intermediate position between the pedestal and the jig portion, and at the pedestal position, the pin portion is supported by the support base to lift the crankshaft, After loading and unloading the crankshaft at the jig part, it returns to the standby position and waits, and at the time of unloading, follows the reverse of the predetermined trajectory from the standby position, Since the pin portion is supported by the support base at the section to lift the crankshaft and the crankshaft is loaded and unloaded at the receiving base position, the crankshaft is returned to the standby position, so that the balance during loading of the work is good, Easy loading and unloading of workpieces. In addition, since the pin is supported, it does not interfere with the jig for fixing the crankshaft, and furthermore, it is possible to reliably avoid interference with the processing part and the transfer part during processing and transfer of the crankshaft, and to ensure that the machine tools are The so-called transfer machine, which conveys the work and sequentially executes a number of machining steps, can be performed without any problems. Moreover, when such a transfer machine is used, the crankshaft can be mounted on each dedicated machine for machining each shaft of the crankshaft. As the loading device for loading and unloading, the method of supporting the pin part that does not interfere with the jig is adopted, so it is possible to apply the loading device that supports the same part (pin part) of the crankshaft, and to manufacture the loading device with the same design. This has various effects that it can be applied to each dedicated machine.

[Brief description of drawings]

FIG. 1 shows an embodiment of a crankshaft loading device according to the present invention, which is a partial cross-sectional side view of the device, FIG. 2 is a front view of the device, and FIG. 3 is a dedicated application of the device. A side view of the drilling machine and FIG. 4 are front views of the drilling machine. 1 ... Loading device, 3 ... Crank shaft, 3a ...
Pin portion, 3b ... Shaft portion, 5 ... Dedicated drilling machine, 6 ... Jig, 7
... conveying device, 10 ... base, 20 ... moving base, 30 ... loading arm, 35 ... supporting base, 70 ... receiving base.

Claims (1)

[Scope of utility model registration request] 1. A loading device for loading and unloading a crankshaft for a straight type 6 engine between a pedestal of a transfer device and a jig part of a machine tool, wherein a tip portion corresponds to the pedestal position and the jig part. A loading arm that moves along a predetermined locus between positions corresponding to the position, and a support that is attached to the tip of the loading arm so that it can always maintain a horizontal posture, and that supports two in-phase pin portions of the crankshaft at two positions. The loading arm, when loading, traces the predetermined locus from a standby position set at an intermediate position between the cradle and the jig portion, and the pin portion is supported by the support pedestal at the cradle position. After supporting and lifting the crankshaft and loading and unloading the crankshaft at the jig part, it returns to the standby position and stands by, and at the time of unloading, the front Following the reverse of the predetermined locus from the standby position, the pin portion is supported by the jig on the support base to lift the crankshaft, and the crankshaft is loaded and unloaded at the cradle position and then moved to the standby position. Crankshaft loading device characterized by returning.