JPH0680802U - Connecting structure of a device for supporting a work air bleeding pin and a moving member for moving the pin - Google Patents

Abstract

(57) [Abstract] [Purpose] To secure the connection between the moving member and the support device, and to easily and reliably center them. [Structure] In the screw hole 20 engraved on the outer surface of the supporting device 1 '
When the screw 21 is screwed and the tip 21a of the screw 21 is locked in the annular groove 19 cut in the outer peripheral surface 6a of the moving member 2, the moving member 2
Since the vertical movement of the two is regulated by the screw 21, the mutual connection is ensured, and the supporting device 1 ′ is not deformed by the tightening of the screw 21, so that the moving member 2 and the supporting device 1 ′ are not deformed. The center will not go mad.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for connecting a support device for an air bleeding pin of a work and a moving member for moving the pin, and particularly to bleeding air inside a plunger of a valve adjuster used for a valve operating mechanism of an automobile engine. TECHNICAL FIELD The present invention relates to a connecting structure of a supporting device that supports a pin for use with a moving member that moves the supporting device.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, for example, as shown in FIGS. 2 and 3, the air bleeding inside the plunger of a valve adjuster used for a valve operating mechanism of an automobile engine is performed by using an air bleeding pin (2) supported by a supporting device (1). The air is extracted by lowering it into the plunger and pressing the tip end (2a) of the air bleeding pin (2) against the air bleeding portion.

The support device (1) comprises an upper support (3) and a lower support (4). The upper support (3) is provided with a disc portion (5) and a fitting hole (7) into which a piston rod (6), which is a moving member in an air cylinder (not shown), is fitted in a substantially central portion of an upper surface thereof. When the piston rod (6) is fitted in the fitting hole (7), the piston rod (6) is tightened. It consists of a pair of opposed rectangular fastening parts (8 '). The tightening portion (8 ') is tightened with the bolt (9) and the nut (10).

The lower support body (4) is integrally formed with a disc portion (11) having the same size as the disc portion (5) of the upper support body (3) and a substantially central portion of the lower surface of the disc portion (11). And a cylindrical portion (12) having an inverted convex shape in vertical cross section, which is composed of an enlarged diameter portion (12a) and a reduced diameter portion (12b).

A fitting hole (13) having the same diameter as that of the fitting hole (7) of the upper support (3) is formed substantially at the center of the upper surface of the disc portion (11) of the lower support (4). Has been drilled.

[0006] Further, at the lower end of the fitting hole (13), a through hole (downward in which the diameter is reduced in two steps so that the head portion (2b) and the shaft portion (2c) of the air bleeding pin can be inserted. 14) are installed in a row.

A screw hole (15) facing the centripetal direction is formed on the outer peripheral surface of the reduced diameter portion (12b) of the lower support (4), and a screw (16) is screwed into the screw hole (15). By doing so, the air bleeding pin (2) is pressed and fixed at its tip. Incidentally, (17) is a bolt for integrally fixing the upper support (3) and the lower support (4), and (18) is a nut.

To connect the support device (1) and the piston rod (6), the air bleeding pin (2) is previously inserted into the fitting hole (14) from above the lower support body (4). After that, the upper support body (3) and the lower support body (4) are tightened by bolts (17) and nuts (18) to be integrated. Next, screw the screw (16) into the screw hole (15) and press the tip of the screw (16) against the air bleeding pin (2) to fix the air bleeding pin (2). .

Further, the piston rod (6) is fitted in the fitting hole (7) and the bolt is
By tightening the tightening part (8 ') with (9) and the nut (10), the piston rod
Connect (6) and the support device (1).

After being connected in this way, the piston rod (6) is lowered and the tip of the piston rod (6) is pressed against the upper end of a check ball (not shown) provided in the plunger. , Air is removed between the bottom of the plunger and the check ball.

[0011]

[Problems to be solved by the device]

 However, in the connection structure of the support device (1) and the piston rod (6) described above, after the piston rod (6) is fitted in the fitting hole (7), the tightening portion (8 ') is When tightened with the bolt (9) and the nut (10), the inner surface of the cylindrical part (8) is elastically deformed and the roundness gradually decreases. Therefore, the tightening of the bolt (9) and the nut (10) may increase or decrease the piston lock. Misalignment occurs between the center of the cable (6) and the support device (1), and it takes time to center them, and if the misalignment is left in the center, the air bleeding work can be done efficiently. There is a problem that it cannot be done.

The present invention has been made to solve the above-mentioned problems, and completely connects the piston rod, which is a moving member, and the support device, and also connects the piston rod center and the support device center. An object of the present invention is to provide a connecting structure of a support device for a work air bleeding pin and a moving member for moving the work, which can perform centering easily and reliably.

[0013]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a top end of a rod-shaped movable member that can move in the vertical direction and an upper surface of a support device that supports a rod-shaped air bleeding pin for bleeding air inside a workpiece on the lower surface. The air-releasing pin supported by the supporting device is moved into the work, and the tip of the air-releasing pin pushes the inner part of the work to push the inner part of the work. In the connecting structure of the device for supporting the air bleeding pin of the work for bleeding the work and the moving member for moving it, an annular groove is cut in the outer peripheral surface of the tip end of the moving member, and This is intended to solve the above-mentioned problems by featuring that the tip of a screw screwed into a screw hole formed on the side surface is engaged with the annular groove.

[0014]

[Action]

 When a screw is screwed into the screw hole formed in the outer surface of the support device and the tip of the screw is locked in the annular groove cut in the outer peripheral surface of the moving member, the moving member moves vertically. Since it is regulated by the screw, the mutual connection is ensured, and the support device is not deformed by tightening the screw, so that the center of the moving member and the support device is not deviated.

[0015]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. The same members as those described in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

In the present invention, the connecting structure of the device (1 ′) for supporting the work air bleeding pin and the piston rod (6) which is the moving member has a rod-shaped piston rod (moving member) (6) outer periphery of the lower end. An annular groove (19) is cut in the surface (6a), and a fitting hole (7) provided in the upper support (3) is formed in the outer surface (8a) of the cylindrical portion (8) of the supporting device (1 '). ), Two opposing screw holes (20) communicating with the inside of the ring groove are formed, and the tips (21 a) of the screws (21) screwed into the screw holes (20) are connected to the annular groove. It is characterized by being engaged with (19).

With the above-mentioned structure, the piston rod (6) and the supporting device (1 ') are securely connected, and the tip (21a) of the screw (21) is inserted into the annular groove (19). Because of the engagement, the piston rod (6) is firmly fixed to the supporting device (1 '), and there is no risk that the piston rod (6) will come out of the supporting device (1'). Further, the piston rod (6) can be easily pulled out from the fitting hole (7) of the supporting device (1 ') by simply tightening the screw (21), which is convenient.

Further, in a state in which the tips (21a) of the two screws (21) are engaged with the annular groove (19) of the piston rod (6), the center of the piston rod (6) and the support device (1 ′). If the settings are made in advance so that the centers of the above) coincide with each other, it is not necessary to align the centers with each other as in the conventional case, and the efficiency of the air bleeding work is improved.

[0019]

[Effect of device]

 The present invention has the following effects. (a) By locking the tip of the screw in the annular groove of the moving member, the moving member and the supporting device are reliably connected. Therefore, there is no risk of the moving member falling out. Further, by releasing the engagement between the tip of the screw and the annular groove, the moving member can be easily separated from the supporting device, so that the supporting device can be easily replaced.

(B) By engaging the tip of the screw with the annular groove of the moving member so that the center of the moving member and the center of the supporting device are aligned with each other, centering is easier than ever before. In addition, it can be performed reliably. Further, since the supporting device is not deformed by tightening the screw, the center between the moving member and the supporting device is not deviated.

[Brief description of drawings]

FIG. 1 is a vertical side view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a conventional connecting structure.

FIG. 3 is a vertical sectional view taken along line III-III in FIG.

[Explanation of symbols]

(1 ') Support device (2) Air bleeding pin (moving member) (2a) Tip (2b) Head (2c) Shaft (3) Upper support (4) Lower support (5) Disc ( 6) Piston rod (moving member) (6a) Outer peripheral surface (7) Fitting hole (8) Cylindrical part (8a) Outer surface (11) Disc part (12) Cylindrical part (12a) Expanding part (12b) Shrinking Diameter (13) Fitting hole (14) Through hole (15) Screw hole (16) Screw (17) Bolt (18) Nut (19) Annular groove (20) Screw hole (21) Screw (21a) Tip

Claims (1)

[Scope of utility model registration request] 1. A front end of a rod-shaped moving member that can move in the vertical direction is fitted into a fitting hole provided on the upper surface of a supporting device that supports a rod-shaped air bleeding pin for bleeding air inside the workpiece on the lower surface. The air bleeding pin supported by the support device is moved into the work, and the tip of the air bleeding pin presses the points inside the work to bleed the work. In a connecting structure of a pin supporting device and a moving member for moving the pin, an annular groove is cut in an outer peripheral surface of a tip end portion of the moving member, and the pin is screwed into a screw hole engraved on an outer surface of the supporting device. A connecting structure for a support device for a work air bleeding pin and a moving member for moving the work, wherein the tip of the screw is engaged with the annular groove.