JPH0240461B2 - SHIRINDAHETSUDOKUMITSUKEYOHETSUDOBORUTONOWARIDASHISOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention is an assembling machine that automatically assembles a cylinder head to a cylinder block. This invention relates to an indexing device that automatically distributes and indexes to a corresponding position.

Conventional technology Conventionally, a cylinder block and a cylinder head are assembled by stacking a connecting flange formed at the upper peripheral edge of the cylinder block and a connecting flange formed at the lower peripheral edge of the cylinder head with a gasket in between. Then, a head bolt is inserted into the bolt hole formed in both coupling flanges, and a nut is tightened to the inserted head bolt to assemble. Conventionally, an operator manually inserts the head bolts one by one in order to insert the head bolts into each bolt hole of the cylinder head.

Problems to be Solved by the Invention Conventionally, when assembling a cylinder head, an operator had to insert the head bolts into the cylinder head one by one, resulting in very poor work efficiency. Further, since the head bolts are inserted one by one and the operator visually checks whether or not the head bolts are inserted, reliability is poor, and the head bolts may be forgotten to be inserted, resulting in assembly failures.

Therefore, it has been desired to develop an assembling machine that automatically assembles the head bolt to the cylinder head in order to improve the assembling work efficiency. However, when developing an automatic assembly machine, there was a need for a device for automatically distributing and indexing head bolts to positions corresponding to the respective head bolt assembly positions on the cylinder head.

Means for Solving the Problems The present invention is used in a cylinder head assembling machine, and is a rectangular cylinder having a plurality of U-grooves for holding head bolts formed at predetermined intervals along the longitudinal direction on opposing long sides. An index plate, a hydraulic cylinder that moves the index plate in the longitudinal direction and allows the index plate to move slightly back and forth at the stop position, a plurality of limit switches that set the stop position of the index plate, and a head bolt. Two rows of transport chute transport the bolts to predetermined positions on both sides of the index plate, and the two head bolts transported by the transport chute are pushed into a pair of opposing U grooves formed on both sides of the index plate. The pushing means constitutes an indexing device.

Function This invention simultaneously pushes the head bolts that are continuously fed by a conveying chute into the U groove of the index plate from both sides of the index plate one by one using a pushing means, and each time the pushing of one head bolt is completed, the head bolts are split by a hydraulic cylinder. By moving the indexing plate by a predetermined distance and pushing the head bolts into all the U grooves of the indexing plate, the head bolts are distributed to positions corresponding to the bolt holes of the cylinder head and indexed.

Embodiment An assembly machine equipped with an indexing device according to the present invention includes:
Head bolts for assembling the cylinder head sent from a parts feeder etc. are placed in a predetermined number, for example 8 to 4 to 2, so that they match all the bolt holes formed in the cylinder head at a separate location from the cylinder head.
Distribute the bolts into rows and index their positions. After indexing, check all the head bolts so that they do not shift, move them onto the cylinder head combined with the cylinder block, and insert the cylinder head and cylinder block from above. The device of the present invention distributes and indexes the head bolts.

As shown in FIG. 6, the head bolt 1 has a hexagonal part 3 formed at the upper end of a shaft 2 of a predetermined length, and a male thread 5 of a predetermined size cut from the lower end.
is incorporated.

The indexing device has a structure shown in FIGS. 1 to 5. In the figure, reference numeral 10 denotes an indexing plate for indexing the position of the head bolt 1, which is a long rectangle in the front-rear direction, and has U grooves 11a, 11b, 1 for holding the head bolt at predetermined intervals on the opposing long sides.
1c, 11d, 12a, 12b, 12c, 12d
It has been formed into 4 pieces. Said U grooves 11a to 11
d, 12a to 12d are formed to have a width slightly wider than the diameter of the shaft portion 2 of the head bolt 1 and narrower than the diameter of the flange 4, and the U grooves 11a, 11b, 11
The head bolts 1, 1, . . ., which are pushed into the innermost parts of the cylinder heads 1, 11d, 11d, 12a, 12b, 12c, and 12d are arranged so as to correspond to bolt holes formed in the cylinder head (not shown). The index plate 10 is supported on a support frame 13 so as to be movable back and forth.

An indexing cylinder 14 moves the indexing plate 10 back and forth, and is attached to the front end of the support frame 13, and the piston rod 14a is connected to the connecting plate 1.
It is connected to the front end portion of the index plate 10 via 3a, and moves the index plate 10 back and forth along the support frame 13 by expanding and contracting. Further, the hydraulic pressure supply circuit 15 that supplies hydraulic pressure to the index cylinder 14 is provided with an ABR-connected 4-port/3-position switching valve 16, and by switching the switching valve 16, the piston front chamber of the index cylinder 14 is Alternatively, hydraulic pressure is supplied to the piston back chamber to expand and contract the cylinder 14 to move the index plate 10 back and forth, and at the neutral position, only the pump port is closed, and the index cylinder 14 is made freely expandable and retractable through the other ABR ports. The ejection plate 10 can be freely moved back and forth.

17a, 17b, 17c, and 17d are mounting brackets 18 fixed to the front end of the support frame 13.
The limit switches are arranged in a stepped manner in the front and back direction on the side of the hydraulic pressure supply circuit 1.
The switching valve 16 of No. 5 is switched to the neutral position to stop the operation of the indexing cylinder 14, and the indexing plate 10 is stopped.
to stop. 19a, 19b, 19c, 19d
Limit switches 17a to 17a are mounted on the side of the mounting plate 20 fixed to the front end of the index plate 10.
The dog is arranged in a step-like manner symmetrical to 17d, and moves back and forth integrally with the index plate 10, and limit switches 17a and 17 correspond to each other when moving forward.
Kick b, 17c, and 17d to turn it on. The dog 19a turns on the limit switch 17d, the dog 19b turns on the limit switch 17c, the dog 19c turns on the limit switch 17b, and the dog 19d turns on the limit switch 17a. In addition, each dog 1
9a, 19b, 19c, and 19d are U grooves 11a, 11a, and 19d formed in the index plate 10 from the tip side, respectively.
12a, 11b, 12b, 11c, 12c, 11
d and 12d, and the U groove 11 at the forefront
When a and 12a are in the bolt pushing position, each limit switch 17a, 17b, 17c, 17d
is not turned on, and the second U groove 11b, 12
When b is cut to the bolt pushing position, the frontmost dog 19
a turns on the rearmost limit switch 17d,
When the third U-groove 11c, 12c reaches the bolt pushing position, the second dog 19b turns on the third limit switch 17c, and the fourth U-groove 11d,
When 12d reaches the bolt pushing position, the third dog 19c turns on the second limit switch 17b.
However, when the fourth U grooves 11d and 12d pass through the bolt pushing position and the index plate 10 reaches the forward end, the fourth dog 19d turns on the frontmost limit switch 17a.

Guide plates 21 and 22 are arranged on both sides of the upper surface of the support frame 13 along the front-rear direction from the forward end to the backward end of the index plate 10, with a slight gap between both sides of the index plate 10 that moves back and forth. This prevents the head bolts 1, 1... pushed into the U grooves 11a to 11d, 12a to 12d of the advancing index plate 10 from falling off. Further, guide grooves 23 and 24 for holding and guiding the head bolt 1 in the left-right direction are formed at the bolt pushing positions at the rear ends of the guide plates 21 and 22.

Reference numeral 25 denotes a conveyance chute that guides the head bolts 1 continuously fed from a parts feeder (not shown) etc. to the bolt pushing positions on both sides of the index plate 10, and has two rows of conveyance grooves 26 and 27 formed therein. The conveying grooves 26 and 27 are divided into two systems at the rear, with the rear ends facing the outer ends of the guide grooves 23 and 24 formed in the guide plates 21 and 22, so that the head bolts 1 and 1 that have been conveyed are Feed into the guide grooves 23 and 24 for one piece. the conveyance groove 26,
27 is formed to have a width slightly wider than the shaft portion 2 of the head bolt 1 and narrower than the flange 4, and the head bolt 1 is transported while being supported by the flange 4 (see FIGS. 4 and 5).

28 is the guide groove 2 of the guide plates 21 and 22
3, 24, and insert the head bolts 1, 1 into the U grooves 11a to 11d, 12a of the index plate 10.
~ 12d with the pushing means to push the support frame 1
A support block 29 is provided at the center of the rear part of the support block 29, and a pinion gear 30 is rotatably mounted on the center part of the support block 29 via a bearing 31, and the front and rear portions of the pinion gear 30 are provided at the center of the support block 29 so as to sandwich the pinion gear 30 from the front and back directions. A pair of slide shafts 32 and 33 are slidably passed through the slide shafts, and racks 34 and 35 are carved with appropriate dimensions on the surfaces facing the pinion gear 30 at the center of both slide shafts 32 and 33, respectively.
4 and 35 are meshed with the pinion gear 30.
The front part of a rectangular parallelepiped pressing block 36 is fitted and connected to one end of the front sliding shaft 32, and the rear sliding shaft 35 is connected to the rear of the pressing block 36.
One end of the two is slidably fitted. Further, the rear part of a rectangular parallelepiped pressing block 37 is fitted and connected to the other end of the rear sliding shaft 35, and the other end of the front sliding shaft 32 is slidably fitted to the front part of the pressing block 37. be. A pressing body 38,
39 is attached, and the pressing bodies 38, 39 are inserted into the guide grooves 23, 24 formed in the guide plates 21, 22.
They are arranged facing outward on the extension line of . 40 is a pushing cylinder provided on the lower surface of the support block 29, and its piston rod 40a is connected to one of the pushing blocks 36. Therefore, when the pushing cylinder 40 performs an expansion/contraction operation, for example, a shortening operation, one of the pushing blocks 36 moves inward (towards the index plate), and the front slide shaft 32 moves along with this.
This also moves the rear slide shaft 33 through the rack 34, pinion gear 30, and rack 35.
moves to the side opposite to the front slider shaft 32, moves the other pressing block 37 inward (towards the index plate), brings the pressing bodies 38, 39 attached to both pressing blocks 36, 37 closer to each other, and guides them. Groove 2
Push the head bolts 1, 1 in 3, 24 into the U grooves 11a to 11d, 12a to 12d of the index plate 10. Conversely, when the pushing cylinder 40 is extended, it performs the opposite operation to the above and causes the pressing blocks 36, 37 and the pressing bodies 38, 39 to separate from each other.

Reference numeral 41 denotes a push-up mechanism for pushing up the head bolts 1, 1, whose positions are indexed by the index plate 10, so that the head bolts 1, 1... can be chucked.
1d, 12a to 12d, respectively, are erected with push-up rods 43, 43...
A piston rod 44a of a thrust cylinder 44 provided on the lower surface of the cylinder 3 is connected to the lifting plate 42. Therefore, when the thrust cylinder 44 extends, the lifting plate 42 and the thrust rods 43, 43
... has risen and the head bolts 1, 1 are held on the index plate 10 by the thrusting rods 43, 43...
... is pushed up by a predetermined distance. Reference numerals 45 and 45 denote guide rods attached to the elevating plate 42, which horizontally move the elevating plate 42 up and down.

In the above configuration, the operation will be explained. First, the index cylinder 14 extends and moves the index plate 10 backward, and the U grooves 11a and 12 at the frontmost part
a to match the guide grooves 23 and 24 formed in the guide plates 21 and 22. Further, the pushing cylinder 40 is extended and the pushing bodies 38 and 39 are separated from each other and placed outside the guide plates 21 and 22. In this state, the head bolts 1, 1 are moved from the parts feeder to the conveying groove 2 of the conveying chute 25.
6 and 27 to the bolt pushing position, and the guide grooves 2 of the guide plates 21 and 22, respectively.
When one cylinder is inserted into 3 and 24, the push cylinder 4
0 moves a pair of pressing bodies 38 and 39 disposed outside the guide plates 21 and 22 to approach each other, and the pressing bodies 38 and 39 compress the head bolts 1 and 2.
1 in the frontmost U groove 11a of the index plate 10,
Push it into 12a. When the pushing of the head bolts 1, 1 is completed, the pushing cylinder 40 is extended to separate the pressing bodies 38, 39, and the subsequent head bolts 1, 1 are inserted into the guide grooves 23, 24 one by one. After this, the indexing cylinder 14 performs a shortening operation to advance the indexing plate 10, and the frontmost dog 19
a turns on the rearmost limit switch 17a,
Second U groove 11b, 12 of index plate 10
b coincide with the guide grooves 23 and 24. Next, the pushing cylinder 40 is shortened again, and the pushing bodies 38, 3 are compressed.
9 close to each other, and the head bolts 1 and 1 in the guide grooves 23 and 24 are inserted into the U groove 11 of the index plate 10.
b, push into 12b. When the pushing of the head bolts 1, 1 is completed, the pushing cylinder 40 is extended and the pushing bodies 38, 39 are separated from each other and retracted to the outside of the guide grooves 23, 24, and then the indexing cylinder 14 is shortened. to advance the index plate 10, the second dog 19b turns on the third limit switch 17c, and the third U groove 11
c, 12c are aligned with the guide grooves 23, 24. Thereafter, as described above, the pressing bodies 38, 39 approach each other and push the head bolts 1, 1 in the guide grooves 23, 24 into the U grooves 11c, 12c. When the pushing of the head bolts 1, 1 is completed, the pressing bodies 38, 39
is retracted outward, and then the indexing cylinder 14 is shortened to move the indexing plate 10 forward, and the third dog 19c turns on the second dog 17b.
The fourth U grooves 11d and 12d are connected to the guide grooves 23 and 24.
match. After this, the pressing bodies 38 and 39 approach each other, and the head bolts 1 and 1 in the guide grooves 23 and 24
1 into the U grooves 11d and 12d. When the pressing of the head bolts 1, 1 is completed, the pressing body 3
8 and 39 are retracted outward, and then the index cylinder 14 is shortened to move the index plate 10 forward, and the dog 19d at the rear turns on the limit switch 17a at the front, and the index plate 10 moves forward. When it reaches the end, the push-up cylinder 44 of the push-up mechanism 41 is extended to raise the push-up rods 43, 43..., and the push-up rods 43, 43... 11d, 12a
The head bolts 1, 1... held at positions 12d and 12d are pushed up by an appropriate amount, and then the indexed head bolts 1, 1... are chucked using an appropriate chuck mechanism (not shown) so that the head bolts 1, 1... are not displaced. It is taken out from the index plate 10 and supplied to the cylinder head.
When the head bolts 1, 1, . . . are taken out from the index plate 10, the index cylinder 14 is extended to move the index plate 10 backward, so that the U-grooves 11a, 12a at the forefront are aligned with the guide grooves 23, 24. . Thereafter, the above-described operation is repeated to remove each U groove 11a to 11d, 12a to 12 of the index plate 10.
Distribute the head bolts 1, 1... and index their positions by pushing the head bolts 1, 1... into the head d.

Note that when the head bolts 1, 1... are pushed in, the guide grooves 23, 24 formed in the guide plate 10 and the U
Even if the grooves 11a and 12a do not match exactly and are misaligned, when the head bolts 1 and 1 are pushed in, the switching valve 16 of the hydraulic pressure supply circuit 15 for supplying pressure oil to the index cylinder 14 is in the neutral position. The index cylinder 14 is held in position and is freely expandable and retractable, so when the head bolts 1, 1 are pushed in, the index plate 10 moves back and forth following it, so the head bolts 1, 1 move into the U grooves 11a, 12a.
It is pushed firmly inside.

Effects of the Invention This invention allows the head bolts to be pushed and supported into each U-groove of the indexing plate, thereby distributing the head bolts to match the bolt holes of the cylinder head and indexing their positions, thereby making it possible to automate the supply of head bolts. It becomes possible. In addition, when pushing in the head bolt, the index plate can be moved freely back and forth, so even if the U groove of the index plate and the guide groove of the guide plate do not match exactly, the head bolt can be pushed in reliably. ,
The index plate can be roughly positioned and the structure can be simplified.

[Brief explanation of drawings]

FIG. 1 is a plan view of an indexing device according to the present invention, FIG. 2 is a longitudinal cross-sectional view of the indexing device, FIG. 3 is a cross-sectional view of the indexing device, and FIG. 4 is a cross-sectional view taken along the line taken from FIG. 1. ,
FIG. 5 is a sectional view taken along the line of FIG. 1, and FIG. 6 is a front view of the head bolt. 1... Head bolt, 10... Index table, 11a to 11d, 12a to 12d... U groove,
14... Index cylinder, 16... Switching valve, 17
a~17d...Limit switch, 19a~19
d...Dog, 21, 22...Guide plate, 2
3, 24... Guide groove, 28... Pushing means.

Claims (1)

[Claims] 1. A rectangular indexing plate with a plurality of U-grooves for holding head bolts formed at predetermined intervals along the lengthwise direction on opposing long sides, and a rectangular indexing plate that is moved longitudinally and indexed at each stop position. A hydraulic cylinder that allows the extraction plate to move back and forth, a plurality of limit switches that set the stop position of the index plate, and two rows of transport chutes that transport the head bolts to predetermined positions on both sides of the index plate.
A head bolt for assembling a cylinder head, comprising a pushing means for pushing the two head bolts transported by the transport chute into a pair of opposing U grooves formed on both sides of the index plate. Indexing device.