JP5954813B2 - Parts transfer jig - Google Patents

Description

  The present invention relates to a component transfer jig that holds and transfers a camshaft and a cam cap that are assembled to a cylinder head of an automobile engine.

  The assembly process of the cylinder head of the automobile engine is performed, for example, according to the following procedure.

(1) Assemble the valve mechanism to the cylinder head and attach a dummy lifter to the valve.
(2) Assemble the camshaft and cam cap to the cylinder head.
(3) The valve clearance between the cam and the dummy lifter is measured to determine the lifter class (thickness).
(4) Remove the camshaft and cam cap from the cylinder head.
(5) The lifter of the class determined in the step (3) is attached to the cylinder head.
(6) Reassemble the camshaft and cam cap to the cylinder head.

  Assembling the camshaft and cam cap to the cylinder head performed in the steps (2) and (6) and removing the camshaft and cam cap from the cylinder head in the step (4) are usually performed. Since it is performed manually by an operator, it is very time-consuming. In addition, the cam cap once removed from the cylinder head needs to be assembled at the same location, but if the cam caps are assembled manually one by one, there is a risk of assembly at an incorrect location.

  Thus, for example, Patent Document 1 discloses a component transfer jig that transfers a camshaft and a plurality of cam caps held together. In this component transfer jig, as shown in FIG. 1 of the same document, a plurality of cam caps are pressed from above by the cap pressing portion (13), and the cam shaft is pressed from above by the shaft pressing portion (14). As shown in FIG. 7 of the same document, the hook (32) provided on the opening / closing member (16) by opening the opening / closing member (16) by tilting the manual operation member (17) from the upright position to the horizontal position. The camshaft is supported from below. According to this component transfer jig, the camshaft and the plurality of cam caps can be collectively transferred while being held in the same arrangement as in the assembled state. Attaching mistakes can be prevented.

Japanese Patent Laid-Open No. 9-277128

  In the component transfer jig of Patent Document 1, the manual operation member (17) is tilted from the upright position to the horizontal position to hold the camshaft and the cam cap, and then held from the manual operation member (17) to the handle (19). Instead, the camshaft and the cam cap are transferred by lifting the component transfer jig. As described above, since the holding and transfer of the camshaft and the cam cap are performed by completely separate operations, man-hours are increased and the tact time is increased. Further, when the manual operation member (17) is tilted, there is a possibility that the component transfer jig is inclined and the camshaft and the cam cap are not completely held.

  In addition, the camshaft and the cam cap removed from the cylinder head in the step (4) are temporarily placed on a pallet (parts table) provided in another place. At this time, the mounting surface of the cam cap on the cylinder head faces downward, so if this mounting surface is placed on a pallet, foreign matter may adhere to the mounting surface of the cam cap or the mounting surface may be damaged. There is a fear.

  A first problem to be solved by the present invention is to provide a component transfer jig that can transfer a camshaft and a cam cap in a short time and reliably.

  A second problem to be solved by the present invention is to prevent foreign matter from adhering to the mounting surface of the cam cap and damage to the mounting surface when the cam shaft and the cam cap are temporarily placed on the pallet. .

  A component transfer jig according to the present invention, which has been made to solve the above first problem, transfers a camshaft and a plurality of cam caps mounted on the camshaft in a batch. A main shaft, a plurality of cap pressing portions that are provided below the main body and press a plurality of cam caps from above, a shaft extending in the horizontal direction, and a camshaft that is rotatable about the shaft. A rotating arm having a support portion for supporting the handle from below, a handle that is slidable in the vertical direction with respect to the main body, and the rotary arm and the handle are connected to each other, and the vertical sliding of the handle is used to rotate the rotary arm. A link mechanism for conversion, and by pulling up the handle, the rotating arm is rotated to dispose the support portion below the camshaft.

  As described above, the component transfer jig according to the present invention rotates the rotating arm by pulling the handle upward to arrange the support portion below the camshaft, and the camshaft from below is supported by this support portion. It is something to support. Therefore, after pulling up the handle, the camshaft is supported from below by the support part of the rotating arm, the camshaft and cam cap are held together by the component transfer jig, and then the handle is further lifted to cam together with the component transfer jig. The shaft and cam cap can be lifted and transferred. As described above, the camshaft and the cam cap can be held and transferred by the same operation (the operation of pulling up the handle), so that the man-hours can be reduced and the tact time can be reduced as compared with the case where these operations are performed separately. Shortened. In addition, since the camshaft and cam cap can be held by the component transfer jig simply by sliding the handle upward, the component transfer jig is less likely to tilt than when the handle is tilted from the upright position to the horizontal position. The camshaft and the cam cup can be securely held.

  For example, if the rotary arm can be slid in the vertical direction only when the support portion is disposed below the camshaft, the support portion can be slid upward from directly below the camshaft and brought into contact with the camshaft. Therefore, for example, even when the outer diameter of the camshaft is different, the camshaft can be reliably supported by the support portion.

  Specifically, for example, a bearing that rotatably supports the shaft is provided, and a cylindrical surface and a flat cutout portion in which a part of the cylindrical surface is cut out are provided on the outer peripheral surface of the shaft. A cylindrical bearing surface for slidingly supporting the cylindrical surface and a pair of flat surfaces extending upward from the bearing surface are provided, and the distance between the pair of flat surfaces is smaller than the outer diameter of the cylindrical surface and the minimum of the shaft What is necessary is just to make it slightly larger than an outer diameter.

  Thus, when the distance between the pair of flat surfaces is smaller than the outer diameter of the cylindrical surface of the shaft, the vertical sliding of the shaft is restricted, and the shaft is held on the bearing surface. When the distance between the pair of flat surfaces is slightly larger than the minimum outer diameter of the shaft, and the notch portion of the shaft is parallel to the vertical direction, the minimum outer diameter of the shaft is fitted between the pair of flat surfaces. However, sliding upward of the shaft and the rotating arm is allowed. At this time, since the shaft is fitted between the pair of flat surfaces, the notch portion of the shaft and the flat surface are engaged with each other in the rotation direction, so that the rotation of the shaft and the rotary arm is restricted. Thus, when the component is transferred while the camshaft is supported by the rotating arm, the rotating arm can be prevented from rotating and the component falling. Therefore, according to the above configuration, after the rotating arm is rotated and the support portion is disposed below the camshaft, the rotating arm is slid upward to bring the support portion into contact with the camshaft from below. A series of operations of locking the rotating arm can be performed simply by pulling up the handle and rotating the shaft. In addition, according to the above configuration, the mechanism that restricts the vertical sliding of the shaft, the mechanism that allows the vertical sliding of the shaft, and the mechanism that restricts the rotation of the shaft and the rotating arm are all configured as a shaft and a bearing. Therefore, the structure of the component transfer jig can be simplified.

  In addition, a pallet according to the present invention, which has been made to solve the above second problem, temporarily places a camshaft and a plurality of cam caps mounted on the camshaft in a state similar to the assembled state. A shaft support base for supporting the camshaft from below and a cap support base for supporting the cam cap from below, the cap support base of the cam cap being attached to the cylinder head And supporting the shoulder surface provided through the step.

  In this way, the cam cap can be supported in a state of non-contact with the mounting surface by supporting the cam cap mounting surface and the shoulder surface provided through the step, so that foreign matter adheres to the mounting surface and the mounting surface. Damage can be avoided.

  As described above, according to the component transfer jig of the present invention, the camshaft and the cam cap can be collectively transferred in a short time and surely.

  In addition, according to the pallet of the present invention, when the camshaft and the cam cap are temporarily placed on the pallet, it is possible to prevent foreign matter from adhering to the mounting surface of the cam cap and damage to the mounting surface.

It is a perspective view of the components transfer jig concerning one embodiment of the present invention. It is a front view of the said component transfer jig. It is a top view of the said component transfer jig. It is a side view of the said component transfer jig. (A)-(c) is sectional drawing of the bearing and axis | shaft of the said component transfer jig | tool. It is a side view of the link mechanism and rotation arm of the said component transfer jig, (a) shows the state which closed a pair of rotation arm, (b) shows the open state. It is a perspective view of the pallet which concerns on one Embodiment of this invention. (A) is a perspective view of the cap support base and cam cap of the pallet, and (b) is a side view of a state where the cam cap is placed on the cap support base. (C) is a top view of a cam cap. (A)-(c) is a side view which shows the procedure which transfers the cam shaft and cam cap which were mounted in the said pallet using the said component transfer jig. It is a side view of the shaft support part and cap support part of the pallet which concern on other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  A component transfer jig 1 according to an embodiment of the present invention includes a pair of camshafts arranged in parallel, and a plurality of (for example, four, four in total) cam caps mounted on each camshaft. It is intended for batch transfer. As shown in FIGS. 1 to 4, the component transfer jig 1 includes a main body portion 2, a cap pressing portion 3, a shaft pressing portion 4, a shaft 5, a bearing 6, a rotating arm 7, and a link mechanism 8. And a handle 9 are mainly provided. In the following description, the longitudinal direction of the main body 2 (the left-right direction in FIGS. 2 and 3), that is, the axial direction of the camshaft held by the component transfer jig 1 is referred to as “longitudinal direction”. A lateral direction 2 (vertical direction in FIG. 3, horizontal direction in FIG. 4), that is, a horizontal direction orthogonal to the axial direction of the camshaft is referred to as a “width direction”.

  The main body 2 has a rectangular plate shape substantially the same as that of a cylinder head (not shown). On the lower surface of the main body 2, a cap pressing portion 3, a shaft pressing portion 4, and a rough guide 10 are provided so as to protrude downward. The rough guide 10 is provided at a position corresponding to the plug hole of the cylinder head, and is provided at two locations in the illustrated example. A pair of bearings 6 are provided on the upper surface of the main body 2, and the shaft 5 is rotatably attached to the bearings 6. A pair of handles 11 are provided at both longitudinal ends of the upper surface of the main body 2.

  The cap pressing part 3 is provided at a position where a plurality of cam caps can be pressed together from above. In the illustrated example, a total of eight cap pressing portions 3 are provided, four each along the long side of the main body portion 2. At the tip of the cap pressing part 3, a pressing member 3a formed of urethane or the like is provided. A spring 3b is disposed above the pressing member 3a, and the pressing member 3a is movable upward while compressing the spring 3b.

  The shaft pressing portion 4 is provided at a position where the camshaft can be pressed from above. In the illustrated example, a total of four shaft pressing portions 4 are provided, two for each camshaft. The lower end of the shaft pressing portion 4 has a shape that can be fitted to the outer peripheral surface of the camshaft, and in the illustrated example, has an arc shape that follows the outer peripheral surface of the camshaft (see FIG. 4).

  The shaft 5 extends in the horizontal direction, specifically in the horizontal direction intersecting the width direction, in the illustrated example in the longitudinal direction, and is provided at the center in the width direction of the main body 2. In this embodiment, the vicinity of both ends of the shaft 5 is rotatably supported by the pair of bearings 6. As shown in FIG. 5, a region of the shaft 5 that is supported by the bearing 6 is provided with a cylindrical surface 5a and a cutout portion 5b in which a part of the cylindrical surface 5a in the circumferential direction is cut out. The notch 5b is a flat surface parallel to the axial direction. In the example of illustration, a pair of parallel notch parts 5b which oppose a diameter direction are provided.

  The bearing 6 has a cylindrical bearing surface 6a and a lock hole 6b provided continuously above the bearing surface 6a. The bearing surface 6a has an inner diameter slightly larger than the outer diameter D of the cylindrical surface 5a of the shaft 5 (see FIG. 5A). The lock hole 6b has a pair of flat surfaces 6b1 extending in the vertical direction. The distance L between the pair of flat surfaces 6b1 is smaller than the outer diameter D of the cylindrical surface 5a of the shaft 5, and is slightly larger than the minimum outer diameter of the shaft 5, that is, the distance Dmin between the pair of notches 5b in the illustrated example. (Dmin <L <D1).

  As shown in FIG. 6, the rotary arm 7 is rotatable about the shaft 5, and is provided with a hook 7 a as a support portion that supports the camshaft S from below. In the present embodiment, a pair of rotating arms 7 are provided apart in the axial direction (see FIG. 2). One rotating arm 7 is provided to be rotatable relative to the shaft 5, and the other rotating arm 7 is fixed to the shaft 5. The pair of rotating arms 7 are opened and closed symmetrically in the width direction via a link mechanism 8 described later, and a hook 7 a is provided on the outer side in the width direction of each rotating arm 7.

  The link mechanism 8 converts a vertical slide of the handle 9 into a rotational motion (opening / closing operation) of the pair of rotating arms 7. As shown in FIG. 6A, the link mechanism 8 of the present embodiment includes a first link 8a and a second link 8b that are rotatably provided around the shaft 5, and a first link 8a and a second link 8b. The third link 8c and the fourth link 8d are rotatably connected to the upper end of each. The upper end of the third link 8c and the upper end of the fourth link 8d are rotatably connected, and the handle 9 is attached to this connecting portion. The main body portion 2 is provided with a guide portion 12 for guiding the handle 9 in the vertical direction (see FIG. 4).

  The first link 8a is provided so as to be relatively rotatable with respect to the shaft 5, and has one rotating arm 7 integrally therewith. The second link 8 b is fixed to the shaft 5 and rotates together with the shaft 5 and the other rotary arm 7. When the handle 9 is slid upward, the pair of rotating arms 7 are rotated in the opening direction via the link mechanism 8 (see FIG. 6B). On the other hand, when the handle 9 is slid downward, the pair of rotating arms 7 rotate in the closing direction via the link mechanism 8 (see FIG. 6A).

  Next, the structure of the pallet 20 which concerns on one Embodiment of this invention is demonstrated. The pallet 20 temporarily places the camshaft and the cam cap in a state similar to the assembled state to the cylinder head. As shown in FIG. 7, a shaft support 21 for supporting the camshaft from below, a cam A cap support base 22 for supporting the cap from below and a guide cylinder 23 into which the rough guide 10 of the component transfer jig 1 is inserted into the inner periphery are provided.

  The shaft support 21 is provided in the vicinity of both axial ends of each camshaft S, and has a cylindrical support surface 21a that follows the outer peripheral surface of the camshaft.

  The cap support base 22 supports the plurality of cam caps C at the same positions as in the assembled state. As shown in FIG. 8 (a), the cap support base 22 of the present embodiment has a base portion 22a and a pair of support portions 22b protruding upward from both ends in the width direction of the base portion 22a. Form a letter shape. The upper surface 22b1 of the support portion 22b serves as a support surface that supports the cam cap C. A concave portion 22b2 is provided on the inner side surface of the support portion 22b in order to avoid interference with the cam cap C and the bolt B placed on the upper surface 22b1. Thus, by making the cap support base 22 substantially U-shaped, a sufficient space can be formed below the bearing surface C1 of the cam cap C, and the camshaft S can be disposed in this space. The camshaft S and the cam cap C can be temporarily placed in the same state as the assembled state to the cylinder head (see FIG. 8B).

  The cam cap C has a mounting surface C2 and a shoulder surface C3 provided through a step. In the illustrated example, a flange portion C4 protruding outward from the four corners in a plan view of the cam cap C is provided (see FIG. 8C), and the lower surface of the flange portion C4 constitutes the shoulder surface C3 (FIG. 8 ( b)). By supporting the shoulder surface C3 of the cam cap C with the upper surface 22b1 of the support portion 22b of the cap support base 22, the cam cap C can be supported without the cap support base 22 and the attachment face C2 being in contact with each other. It is possible to prevent foreign matter from adhering to the surface or damage to the mounting surface C2. When the cam cap C is removed from the cylinder head during engine maintenance or the like, the cam cap C can be easily removed using the shoulder surface C3.

  Next, a procedure for transferring the camshaft S and the cam cap C at once using the component transfer jig 1 will be described. In this embodiment, as shown to Fig.9 (a), the case where the camshaft S and the cam cap C which were temporarily placed on the pallet 20 are transferred to a cylinder head is shown.

  First, as shown in FIG. 9A, the component transfer jig 1 is lowered from above the camshaft S and the cam cap C temporarily placed on the pallet 20. Specifically, the handle 9 of the component transfer jig 1 is set at the lower end position to close the pair of rotating arms 7 (see FIG. 4), and the operator holds the handle 11 and lowers the pallet 20 from above. Then, the rough guide 10 of the component transfer jig 1 is fitted and inserted into the inner periphery of the guide cylinder 23 of the pallet 20, and the pressing member 3a of the cap pressing portion 3 is brought into contact with the cam cap C from above. When the component transfer jig 1 is further lowered, the spring 3b of the cap pressing portion 3 is compressed, and the cam cap C is urged downward. When the lower end of the shaft pressing portion 4 comes into contact with the camshaft S, the component transfer jig 1 is placed on the camshaft S and the cam cap C (see FIG. 9B).

  Thereafter, the operator pulls the handle 9 upward. Thereby, in a state where the component transfer jig 1 is placed on the pallet 20, the shaft 5 rotates via the link mechanism 8 (see FIG. 5), and the pair of rotating arms 7 opens (FIG. 6 ( b)). Specifically, when the notch 5b of the shaft 5 intersects the vertical direction, the vertical sliding of the shaft 5 is restricted, and the cylindrical surface 5a of the shaft 5 is slidably supported by the bearing surface 6a. (See FIGS. 5A and 5B). At this time, the hook 7a of each rotary arm 7 does not reach directly below the camshaft S. And as shown in FIG.5 (c), if the notch part 5b of the axis | shaft 5 becomes parallel to an up-down direction, a pair of notch part 5b will fit between a pair of flat surfaces 6b1 of the lock hole 6b simultaneously. The shaft 5 slides upward. At this time, the hook 7a of each rotary arm 7 is disposed below the camshaft S (see the solid line in FIG. 6B). In this way, the pair of rotating arms 7 is allowed to slide in the vertical direction only when the hook 7a is arranged directly below the camshaft S.

  As the shaft 5 slides upward in this manner, the shaft 5, the rotating arm 7, the link mechanism 8, and the handle 9 slide together upward, and the hook 7a of the rotating arm 7 contacts the camshaft S from below (see FIG. 6 (b) (see chain line). Accordingly, the camshaft S is supported from above and below by the shaft pressing portion 4 and the rotating arm 7, and the cam cap C is supported from above and below by the cap pressing portion 3 and the camshaft S. The camshaft S and the cam cap C are components. It is integrally held by the transfer jig 1 (see FIG. 9C). At this time, the shaft 5 of the component transfer jig 1 is fitted into the lock hole 6b of the bearing 6, and the notch portion 5b of the shaft 5 and the pair of flat surfaces 6b1 are engaged in the rotation direction. 5 is restricted, and the rotary arm 7 is locked in a state where the camshaft S and the cam cap are held (see FIG. 5C).

  Thereafter, by further lifting the handle 9, the camshaft S and the cam cap C can be lifted from the pallet 20 and transferred to the cylinder head. At this time, since the rotary arm 7 is locked by the engagement between the notch portion 5b of the shaft 5 and the pair of flat surfaces 6b1 of the bearing 6, the rotary arm 7 rotates during the transfer and the camshaft S and the cam The cap C itself can be prevented from falling.

  In this way, the operator only needs to pull up the handle 9 to integrate the camshaft S and cam cap C and the component transfer jig 1 and lift these components from the pallet 20. Can do. Thereby, the man-hour required for transfer of the camshaft S and the cam cap C is reduced, and the tact time is shortened. Further, in the present embodiment, since the rotary arm 7 can be locked by the pulling operation of the handle 9, the tact time is further shortened.

  Further, as described above, after opening the pair of rotating arms 7 and arranging the hooks 7a below the camshaft S, the pair of rotating arms 7 is slid upward and brought into contact with the camshaft S, so that the hooks 7a can be brought into contact with the camshaft S from directly below, so that the camshaft S can be supported without problems even when the outer diameter of the camshaft S is different. In particular, in the present embodiment, the hook 7a of the rotary arm 7 has an open V-groove shape with the cam shaft S disposed below the camshaft S. It can be supported stably.

  In the above embodiment, the case where the camshaft S and the cam cap C are transferred from the pallet 20 to the cylinder head is shown, but the case where the camshaft S and the cam cap C are transferred from the cylinder head to the pallet 20 is similarly performed.

  When the camshaft S and the cam cap C held by the component transfer jig 1 are placed on the pallet 20, impact due to the placement is applied to the contact portion between the camshaft S and the shaft support 21, and the camshaft S may be damaged. Therefore, as shown in FIG. 10, the shaft support 21 and the cap are formed so that a vertical gap M is formed between the cam cap C placed on the pallet 20 and the camshaft S (see the dotted line). It is preferable to set the height of the support base 22. When the camshaft S and the cam cap C held by the component transfer jig are placed on the pallet 20, the cam cap C is first supported by the cap support 22. At this time, an impact at the time of placement is applied to the contact portion between the cam cap C and the cap support base 22, but the mounting surface C2 is not damaged because the cam cap C is supported by the shoulder surface C3. . Thereafter, the camshaft S is placed on the shaft support 21 by depressing the handle 9 and sliding the rotary arm 7 downward to lower the camshaft S. In this case, since only the load due to the weight of the camshaft S is applied to the contact portion between the camshaft S and the shaft support 21, the camshaft S can be prevented from being damaged.

DESCRIPTION OF SYMBOLS 1 Component transfer jig | tool 2 Main-body part 3 Cap support part 4 Shaft holding | suppressing part 5 Shaft 5a Cylindrical surface 5b Notch part 6 Bearing 6a Bearing surface 6b Lock hole 6b1 Flat surface 7 Rotating arm 7a Hook (support part)
8 Link mechanism 9 Handle 20 Pallet 21 Shaft support 22 Cap support 23 Guide tube C Cam cap C1 Bearing surface C2 Mounting surface C3 Shoulder surface S Camshaft

Claims (3)

A component transfer jig for holding and transferring a camshaft and a plurality of cam caps mounted on the camshaft in a lump,
A main body portion, a plurality of cap pressing portions provided below the main body portion for pressing the plurality of cam caps from above, a shaft extending in a horizontal direction, and rotatable about the shaft; A rotary arm having a support portion for supporting the handle from below, a handle that is slidable in the vertical direction with respect to the main body, and the rotary arm and the handle that are connected to the rotary arm to rotate the slide in the vertical direction. A link mechanism that converts the rotational movement of the arm,
By pulling the handle, the by rotating the rotary arm via the link mechanism without lifting the main body portion, supporting said cam shaft from below by the support portion,
A component transfer jig for lifting the camshaft and the plurality of cam caps together with the main body by further lifting the handle . Said rotary arm is rotated et which the support portion is arranged beneath the cam shaft, part of claim 1, wherein the rotary arm is the support unit to slide directly above abuts from below the cam shaft Transfer jig. A bearing for rotatably supporting the shaft; a cylindrical surface on the outer peripheral surface of the shaft; and a flat cutout portion obtained by notching a part of the cylindrical surface; and the cylindrical surface on the bearing And a pair of flat surfaces extending upward from the bearing surface,
The component transfer jig according to claim 2, wherein a distance between the pair of flat surfaces is smaller than an outer diameter of the cylindrical surface and slightly larger than a minimum outer diameter of the shaft.

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