JP2954484B2 - Pallet for cylinder head assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet for assembling a cylinder head (hereinafter simply referred to as a pallet). More specifically, intake and exhaust valves (hereinafter, simply referred to as valves)
The present invention relates to a pallet for holding a cylinder head in a predetermined posture when a cylinder head is conveyed to each of the assembling stations by a conveyor to incorporate components such as a spring and a spring.

[0002]

2. Description of the Related Art Conventionally, motorcycle engines and the like are products of various kinds (for example, 30 to 100 models) in small quantities, so that valves, valve springs, stem seal rings, etc. In general, for example, a cylinder head is placed on a workbench, and the necessary components are arranged around the cylinder and then sequentially incorporated. Related prior art is, for example, Japanese Utility Model Laid-Open No. 1-10.
The thing described in 6135 gazette is known.

On the other hand, even in that case, the valve must be inserted into the valve guide hole from inside the cylinder head, while the valve spring and the stem seal ring must be mounted from outside the cylinder head. Therefore, when assembling the valve, it is necessary to rotate the cylinder head by approximately 180 ° to reverse the front and back, and it is very troublesome to manually perform this operation frequently because of the large number and heavy weight.

In addition, it is extremely difficult to incorporate necessary parts into cylinder heads of various engines of various types as described above, for example, by an assembly robot in one production line.

SUMMARY OF THE INVENTION The present invention has been made to solve such inconveniences. The cylinder head can be firmly grasped, the cylinder head can be attached and detached with almost one touch, and the cylinder head can be accurately positioned. It aims to provide a possible pallet.

[0006]

A pallet according to the present invention has a base for mounting a cylinder head, and is pushed into the base.
And a holding mechanism for holding the clamp bar formed at both ends on the base, thereby holding the cylinder head with the base. Has an opening penetrating the front and back and has positioning means for the cylinder head, and the clamp bar has a length corresponding to the length of the cylinder head.
And close to both ends of the clamp bar.
An engaging portion disposed at a portion corresponding to the holding mechanism, the holding mechanism including an engaging member urged in an engaging direction with the engaging portion and the engaging member. It has a lock release mechanism for moving to a non-engagement position.

[0007] Another pallet of the present invention is a cylinder head.
A mounting base, and the base is pressed and gripped by the base.
Clamp bar for each and both ends on the base
Holding mechanism for holding the clamp bar formed in the
And the base penetrates the front and back.
It has an opening and has positioning means for the cylinder head.
And the clamp bar has a predetermined position with respect to the base.
Engagement that can be engaged and held by the holding mechanism in a height range
And the holding mechanism engages with the engaging portion.
Member urged in the direction and the engaging member
Location has a lock release mechanism of the order to move to, the clamping engagement of the bar are a number a rod member having a ratchet teeth of the present, the engaging member, the substantially middle portion of the holding mechanism And a ratchet pawl which can be pivotally supported by the main body of the main body and which can engage with an arbitrary portion of the plurality of ratchet teeth at one end thereof, and an engaging member at the other end of the engaging member. the is swung ratchet pawl and the unlocking mechanism that can operate so as to disengage with the ratchet teeth that are connected.

Further, the lock release mechanism urges the engaging member in the engaging direction of the ratchet pawl by means of the resilient means, and lifts the engaging member against the resilient means so that the engaging member is lifted. It is preferable to be configured to be able to move to the disengaged position of the ratchet pawl.

[0009] Still another pallet of the present invention comprises a cylinder.
A head mounting base and a cylinder head sandwiched between the base.
Clamp bar for pressure gripping, and both ends on the base
Retainers for holding the clamp bar formed on each
And the base supports the front and back.
Positioning hand having an opening through which the cylinder head passes
A step having a step, wherein the clamp bar is
In the predetermined height range.
And the holding mechanism is provided with the engaging portion.
The engaging member urged in the engaging direction and the engaging member
It has a lock release mechanism for moving to the engagement position.
Ri, the positioning means may correspond to a plurality of types of the cylinder head, that is composed from the positioning pin detachably attached to a plurality of locations.

[0010] Still another pallet of the present invention is a cylinder.
A head mounting base and a cylinder head sandwiched between the base.
Clamp bar for pressure gripping, and both ends on the base
Retainers for holding the clamp bar formed on each
And the base supports the front and back.
Positioning hand having an opening through which the cylinder head passes
A step having a step, wherein the clamp bar is
In the predetermined height range.
It has Rukakarigo portion, the holding mechanism, a front Kigakarigo portion
The engaging member urged in the engaging direction and the engaging member
It has a lock release mechanism for moving to the engagement position.
The holding mechanism further includes an unlock holding mechanism for holding the lock release mechanism in the unlocked state and releasing the lock, and the unlock holding mechanism is configured to lock the lock in the unlocked state. the engagement hole of the release mechanism that has a stop pin which can resiliently engage.

[0011] Still another pallet of the present invention is a cylinder.
A head mounting base and a cylinder head sandwiched between the base.
Clamp bar for pressure gripping, and both ends on the base
Retainers for holding the clamp bar formed on each
And the base supports the front and back.
Positioning hand having an opening through which the cylinder head passes
A step having a step, wherein the clamp bar is
In the predetermined height range.
And the holding mechanism is provided with the engaging portion.
The engaging member urged in the engaging direction and the engaging member
It has a lock release mechanism for moving to the engagement position.
Preferably, the base or the holding mechanism is provided with a memory in which the type of the cylinder head to be mounted or the corresponding identification symbol and / or the work content can be written and erased.

[0012]

According to the pallet of the present invention, by matching the cylinder head positioning means of the pallet upon which is placed on the path Re' bets, as the clamp bar, the engaging portion is held by the holding mechanism Simply by setting from above the cylinder head, the engagement portion of the clamp bar and the engagement member of the holding mechanism engage, so that the cylinder head is firmly fixed to the pallet without being displaced or dropped. Therefore, the components are transferred to the waiting stations by the conveyer robot by the conveyor, and the robot enables an accurate assembling operation without any trouble. Also, since the clamp bar can be held at any height, different shapes,
Cylinder heads of different sizes can be held. Further, when the valve is assembled, the cylinder head can be easily and accurately inverted using a reversing table or the like, and the valve can be assembled from the back side of the pallet through the opening thereof.

When the cylinder head after assembly is removed, the engagement between the engaging portion of the clamp bar and the engaging member of the holding mechanism is released only by operating the lock release mechanism.
The cylinder head can be easily removed.

In the case where the clamp bar is held by the ratchet teeth and the ratchet pawl, the one-touch operation is further facilitated, and the mounting of the cylinder head is further strengthened.

An unlocking mechanism urges the engaging member in the direction of engagement of the ratchet pawl by its resilient means, and lifts the engaging member against the ratchet pawl to lift the engaging member against the ratchet pawl. In a configuration in which the clamp bar can be moved to the non-engagement position, the removal of the clamp bar is further facilitated.

In a pallet provided with a plurality of positioning pins, accurate positioning can be performed by using a concave portion such as a bolt hole originally formed in the cylinder head. It is convenient and economical because there is no need for processing.

In the apparatus having the unlock holding mechanism, it is not necessary to hold the lock release mechanism by the operator's hand when removing the clamp bar, so that the handling is easy.

As described above, if the pallet of the present invention is used, even if the cylinder head is of a different type, it can be firmly attached with one-touch accurate positioning, and can be easily removed.

Model code of cylinder head to be assembled and / or
Alternatively, a pallet having a memory in which the contents of work can be written and erased is most suitable for automatically assembling a plurality of types of cylinder heads sequentially while carrying them on a conveyor or the like.

[0020]

Next, an embodiment of a pallet according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the pallet of the present invention, FIG. 2 is a partially cutaway perspective view showing a main part of the pallet of FIG. 1, and FIG. 3 is a sectional view taken along line III-III of FIG. , FIG.
FIG. 4 is a sectional view taken along line IV-IV of FIG. 3.

In FIG. 1, reference numeral 1 denotes a pallet, on a base 2 of which a cylinder head H of a motorcycle engine is mounted.
(See the two-dot chain line). The clamp bar 3 is attached so as to clamp the cylinder head H with the base 2 from above. The clamp bar 3 is a long member exceeding the entire length of the cylinder head H, and the engaging rods 4 and 5 are provided at both ends thereof in the same direction (FIG. 1).
In other words, it protrudes downward from the lower surface of the clamp bar. A number of ratchet teeth 6 are engraved on each of the engagement rods 4 and 5 along the axial direction thereof. The ratchet teeth 6 are for engaging with ratchet claws 17 (see FIG. 3) of the holding mechanism 7 described later. An elastic member 3a such as urethane rubber is partially attached to the lower surface of the clamp bar 3 (see FIG. 3). The elastic member 3a is provided so as not to damage the cylinder head and to absorb the movement of the clamp bar at a fixed pitch (about 1 mm in the present embodiment) due to the engagement of the ratchet.

On the other hand, a holding mechanism 7 capable of firmly holding the clamp bar 3 is provided at both ends of the upper surface of the base 2. A plurality of positioning pins 8 are further provided on the upper surface of the base 2 so as to be detachable so as to position the attached cylinder head H. These positioning pins 8 are provided at positions where they can be fitted into recesses such as bolt holes originally formed in the cylinder head H. Therefore, it is not necessary to take special measures for positioning the work to be placed. The reason why the number of pins is plural and the pins are detachable is that different types of cylinder heads can be mounted on the same pallet. Of course, two or more positioning pins are required for each cylinder head at the same time.

On the other hand, the base 2 is formed with an opening 9 near the center thereof, penetrating the front and back. The opening 9 is for incorporating a part (particularly, a valve) from the lower surface side of the cylinder head H. In such a case, this pallet 1
When the cylinder head is mounted on a reversing table or the like, the valve can be rotated substantially 180 °, and the valve can be assembled from above like other parts.

An ID chip stand 10 for storing the type and / or work contents of a cylinder head to be mounted on a pallet is provided outside one holding mechanism 7 (the one on the left side in the figure). In general, the order of assembling each type of engine over a certain period is determined based on a production plan of a motorcycle engine and the like. Prior to the cylinder head assembling operation, the ID chip (memory) embedded in the ID chip stand 10 is stored in the main sequencer provided in the control station of the assembly line based on the assembling order. The type of cylinder head to be assembled, or the corresponding symbols and work contents are written.

Notches 1a formed on four sides of base 2
Is a space for a stopper when the pallets are continuous, and is also used as a positioning assisting means when the pallets are fixed to a tilt table or the like.

In the drawing, reference numeral 1b also denotes a gripper by a chuck.
This grip portion 1b is formed on both the upper and lower surfaces of the pallet, and the upper surface side lifts the pallet on the conveyor and carries it to the reversing table in an automatic assembly line, for example.
The lower surface is used to fix the pallet to a tilt table or the like. The grip 1b is provided so that a ball lock type chuck can be used.

Next, the holding mechanism 7 will be described with reference to FIG. In this drawing, the engaging rod 4 of the clamp bar 3 is
The state where the holding mechanism 7 is fitted in the fitting hole 11 formed in the main body 7a is shown. A so-called linear ball bearing 12 is mounted in the fitting hole 11 so that the engagement rod 4 can enter and exit smoothly. A receiving member 14 in which a coil spring 13 is inserted is provided in a deep portion of the fitting hole 11, and urges the engaging rod 4 to be pushed upward although the force is not large. This facilitates removal of the clamp bar 3 prior to removal of the cylinder head.

An engaging member 15 for locking the engaging rod 4 at a predetermined position is pivotally supported on the main body 7a by a pin 16 so as to be swingable. A ratchet pawl 17 (see FIG. 3) that can be engaged with the ratchet teeth 6 of the engaging rod 4 is formed at the tip of the engaging member 15. The rear end of the engaging member 15 is connected to an unlocking bar 18 for releasing the engagement of the ratchet pawl 17 with the ratchet teeth 6. The concatenation is
A pin 20 penetrating through a long hole 19 of the engaging member 15 and a hole (not shown) of the unlocking bar 18 allows the engaging member 15 to swing. The unlocking rod 18 is fitted into the hole 21 of the main body 7a, and is mounted between the large-diameter portion 18a at the lower end thereof (see also FIG. 3) and the intermediate step portion 21a of the hole 21 of the main body 7a. Coil spring 2
2 downward. Thereby, normally, the unlocking rod 18 is at the lowermost position, that is, the engaging member 15.
The ratchet pawl 17 is biased so as to be at a position where it can be engaged with the ratchet teeth 6 (shown by a solid line in the figure).

As shown in FIG. 3, the operation of the holding mechanism 7 is such that the ratchet pawl is inserted by inserting the engaging rod 4 into the fitting hole 11 so as to press the cylinder head on the mounted cylinder head with a clamp bar. 17 engages with the ratchet teeth 6 (shown by solid lines in the figure). Although a reaction force (force for pulling up the engaging rod 4) occurs when the cylinder head is pressed by the clamp bar 3, the ratchet pawl 17 comes into strong contact with the ratchet teeth 6 in a direction of being engaged with the ratchet teeth 6 (that is, the engaging member). Fifteen
Strongly presses the engaging rod 4 rightward in the figure).
As shown by a dashed line in the figure, the lower end of the engaging member 15 abuts the horizontal step 7b of the main body 7a at the position A, so that the ratchet pawl 17 does not move upward, so that the lock is released. Never.

Next, to release the locking, the unlocking rod 18 may be pulled up, and the engaging member 15 is greatly inclined and the ratchet pawl 17 is tilted as shown by a two-dot chain line in FIG. Escapes from ratchet teeth 6 and escapes downward B
In the position, the clamp bar 3 is
It can be easily removed upward because it is pushed up.

In FIG. 2, reference numeral 23 denotes an unlocking mechanism. That is, in FIG. 3, this is for stopping the unlocking bar 18 in a state where the unlocking bar 18 is pulled up (a state where the ratchet pawl 17 has escaped downward). When the unlocking bar 18 is pulled up, the through hole 24 formed in the unlocking bar 18 and the guide hole 2 formed in the main body 7a are formed.
5 is horizontal, so the unlocking mechanism 2
3 can be pushed into the main body 7a. That is, FIG.
Also, as shown in FIG. 4, the guide pin 26 of the unlocking mechanism 23 is inserted into the guide hole 25, and at the same time, the stop pin 27 is inserted into the through hole 24 of the unlocking bar 18, so that the unlocking bar 18 is in the unlocked position. Can be held. Actually, the guide pin 26 is urged by the coil spring 28 so as to be elastically inserted into the guide hole 25 in the main body 7a (see FIG. 4). The lock rod 18 is inserted and held in the through hole 24. When releasing the holding of the unlock position, the unlock release mechanism 23 is used.
When the knob 29 is pulled, the unlocking bar 18 moves downward by the elastic force of the coil spring and reaches a position where the clamp bar 3 waits for locking.

When a pallet configured as described above is used, automatic assembly of the cylinder head is also facilitated, and the number of assembling steps and work time of a small number of various types of cylinder heads can be greatly reduced. For example, the corresponding cylinder head is automatically or manually attached to the pallet according to the type of the cylinder head written on the ID chip each time (in the case of manual operation, the type written on the ID chip is transmitted via the detector. The corresponding type and number of parts are arranged and assembled in the assembling station based on instructions from the main sequencer at the assembling station of each part. .

[0034]

According to the present invention, even if the cylinder head is of a different type, it can be accurately positioned with one touch, and firmly attached, and can be easily removed. Therefore, it can be easily adapted to automatic assembly.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a pallet of the present invention.

FIG. 2 is a partially cutaway perspective view showing a main part of the pallet of FIG. 1;

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pallet 2 ... Base 3 ... Clamp bar 4, 5 ... Engagement rod 7 ... Holding mechanism 8 ... Positioning pin 9 ... Opening 15 ... Engagement Member 18 ・ ・ ・ Unlock bar H ・ ・ ・ Cylinder head

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-41828 (JP, A) JP-A-2-262920 (JP, A) JP-A-4-132933 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) B23P 19/00 302 B23P 21/00 303 B23Q 3/06

Claims (6)

(57) [Claims] 1. A base for mounting a cylinder head, and the base
And a holding mechanism for holding the clamp bar formed at each of both ends on the base, by clamping the cylinder head with the base by pushing toward the base. The base has an opening penetrating the front and back sides thereof and has positioning means for a cylinder head, and the clamp bar has a length exceeding the cylinder head.
And the holding machine near both ends of the clamp bar
An engagement portion disposed at a portion corresponding to the structure , wherein the holding mechanism disengages the engagement member biased in the engagement direction with the engagement portion and the engagement member. A pallet for assembling a cylinder head having a lock release mechanism for moving to a position. 2. A base for mounting a cylinder head, and the base.
Clamp bar for clamping the cylinder head
And clamps formed at both ends on the base, respectively.
A holding mechanism for holding the bar, wherein the base has an opening penetrating the front and back sides thereof, and
A positioning means for the damper;
The bar is held at a predetermined height range with respect to the base.
An engagement portion that can be engaged and held by the holding mechanism;
An engagement portion in which a holding mechanism is urged in an engagement direction with the engagement portion
And a lock for moving the engaging member to the disengaged position.
Has a click release mechanism, a rod member the engaging portion of the clamping bar has a large number of ratchet teeth of the engaging member is swingably its substantially middle portion to the main body of said holding mechanism A ratchet pawl, which is rotatably supported and can be engaged with an arbitrary portion of the plurality of ratchet teeth at one end thereof, is provided at the other end of the engaging member by swinging the engaging member. the ratchet teeth and the lock release mechanism is coupled with a Resid Linda head assembly pallet that can be manipulated to disengage the. 3. The lock release mechanism urges the engaging member in the direction of engagement of the ratchet pawl by means of the resilient means, and lifts the engaging member against the resilient means to relieve the engaging member. The pallet for assembling a cylinder head according to claim 2, wherein the pallet is configured to be movable to a position where the ratchet pawl is not engaged. 4. A base for mounting a cylinder head, and the base
Clamp bar for clamping the cylinder head
And clamps formed at both ends on the base, respectively.
A holding mechanism for holding the bar, wherein the base has an opening penetrating the front and back sides thereof, and
A positioning means for the damper;
The bar is held at a predetermined height range with respect to the base.
An engagement portion that can be engaged and held by the holding mechanism;
An engagement portion in which a holding mechanism is urged in an engagement direction with the engagement portion
And a lock for moving the engaging member to the disengaged position.
Unlocking mechanism has said positioning means, a plurality of types of may correspond to the cylinder head, pallets for assembly of has been such Resid cylinder head consists positioning pin detachably attached to a plurality of locations. 5. A base for mounting a cylinder head, and the base.
Clamp bar for clamping the cylinder head
And clamps formed at both ends on the base, respectively.
A holding mechanism for holding the bar, wherein the base has an opening penetrating the front and back sides thereof, and
A positioning means for the damper;
The bar is held at a predetermined height range with respect to the base.
An engagement portion that can be engaged and held by the holding mechanism;
An engagement portion in which a holding mechanism is urged in an engagement direction with the engagement portion
And a lock for moving the engaging member to the disengaged position.
A lock release mechanism, wherein the holding mechanism includes an unlock holding mechanism for holding the lock release mechanism in its unlocked state and releasing the lock. , the unlocking mechanism of the engaging hole to resiliently pallets for assembly of Resid Linda head has a stop pin capable of being engaged in the unlocked state. 6. A base for mounting a cylinder head, and the base.
Clamp bar for clamping the cylinder head
And clamps formed at both ends on the base, respectively.
A holding mechanism for holding the bar, wherein the base has an opening penetrating the front and back sides thereof, and
A positioning means for the damper;
The bar is held at a predetermined height range with respect to the base.
An engagement portion that can be engaged and held by the holding mechanism;
An engagement portion in which a holding mechanism is urged in an engagement direction with the engagement portion
And a lock for moving the engaging member to the disengaged position.
Unlocking mechanism has a type of cylinder to be mounted head or identification mark and / or work is written and an erasable memory comprising been in such Resid Linda head assembly pallet in the corresponding.