JPH0462423B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a novel guide member support device.
Specifically, it is an object of the present invention to provide a new guide member support device that facilitates work for supporting the guide member, does not damage the support shaft extending from the guide member, and allows accurate position adjustment. It is something to do.

2. Description of the Related Art Guide members for guiding guided members such as magnetic tapes are used in many devices such as video tape recorders (hereinafter referred to as "VTR"). In order to correctly guide the guided member, the guide portion of these guide members needs to be set in a correct positional relationship with respect to the device.

However, it is almost impossible for these guide members to be installed in a device with the correct positional relationship from the beginning, and post-manufacturing adjustment work is required.

Therefore, these guide members are usually supported so that the position of the guide portion can be adjusted. FIG. 1 shows an example of a conventional guide member support device configured to be able to adjust the position of such a guide portion.

A is a support portion fixedly provided on the chassis, and a support hole b open at the upper end is formed.
The upper end of the support hole b is enlarged in diameter and has a threaded groove formed on its inner peripheral surface to form a threaded hole c. Reference numeral d denotes a screw hole formed perpendicular to the axial direction of the support hole b, the outer end of which opens on the outer surface of the support portion a, and the inner end communicating with the support hole b.

e is a tape guide, in which a guide roller i is rotatably supported between flanges g and h fixed to one end of the support shaft f and an intermediate portion;
The portion of the intermediate flange h that is in contact with the opposite side of the roller is made thicker and has a helical groove formed on its outer circumferential surface to form a helical shaft portion j.

Thus, the support shaft f of the tape guide e is fitted into the support hole b formed in the support part a, and the screw shaft part j of the tape guide e is fitted into the screw hole c formed at the upper end of the support hole b. is screwed into the Then, the height of the guide roller i is adjusted by screwing in or unscrewing the screw shaft part j into the screw hole c, and when it reaches a predetermined height, the fastener screwed into the screw hole d is screwed into the screw hole c. The screw k is further screwed in so that its tip is brought into pressure contact with the outer surface of the support shaft f, thereby locking the guide roller i at a predetermined height. still,
The rear end of the fastening screw k has a hexagonal hole l in cross section.
is provided, and the tip of a hexagonal wrench is inserted into this hole l to rotate it.

Problems to be Solved by the Invention In the conventional guide member support device described above, since the screw hole d into which the fastening screw k is screwed is provided in a direction perpendicular to the support hole b, the fastening screw The base of k (the part where the hole l is provided) is the support part a
This makes it extremely difficult to find its position or insert the tip of a wrench into the hole in equipment such as VCRs, which are assembled with various parts in a complicated manner. There's a problem.

In addition, since the tip of the fastening screw k is pressed directly against the support shaft f, the outer surface of the support shaft f is easily scratched, and if the support shaft f is scratched, for some reason the tape guide e may be There is also the problem that the support shaft f cannot be removed from the support hole b when it becomes necessary to remove it from the support hole b.

In addition, there is some play in the axial and radial directions between the support shaft f and the support hole b, and between the screw shaft part j and the screw hole c. There is a problem in that the height and inclination change when tightened at k.

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned problems with the conventional guide member supporting device.
It is an object of the present invention to provide a new guide member support device that does not damage a support shaft extending from a guide member and can further precisely adjust the position.

Summary of the Invention In order to achieve the above-mentioned object, the guide member supporting device of the present invention forms a support hole through which a support shaft extending from the guide portion of the guide member is inserted, and has a support hole that is oblique to the axis of the support hole. a threaded hole extending into the threaded hole is formed, and a thin walled portion capable of elastic deformation is formed between the tip of the threaded hole and the support hole, and the tip of the fastening screw threaded into the threaded hole is inserted through the thin walled portion. It is characterized in that the support shaft inserted into the support hole is pressed.

Therefore, according to the present invention, the screw hole into which the fastening screw is screwed is formed diagonally with respect to the support hole, so that the outer end of the screw hole can be placed at a position where it is easy to operate the fastening screw. This makes it possible to significantly improve work efficiency. In addition, since the tip of the fastening screw indirectly presses against the support shaft through the thin wall part, the fastening screw does not damage the support shaft, and after completing the position adjustment of the guide member, the fastening screw can be removed. It has many advantages, such as eliminating the risk of damaging the adjusted state when tightening.

Embodiments Hereinafter, details of the guide member supporting device of the present invention will be explained according to illustrated embodiments.

1 in the figure is a tape guide support device according to the present invention applied to a VTR.

2 is a tape guide for guiding a magnetic tape (not shown) as a guided member, and a support shaft 3
flanges 4, 5 fixed to one end and the middle part;
A guide roller 6 is rotatably supported between the flange 5 and the flange 5 at the intermediate portion in contact with the side opposite to the roller. ing.

A base 8 is made of die-cast aluminum and is fixed to a chassis (not shown).

Reference numeral 9 denotes a support section erected from the base 8. A press-fit hole 10 is formed in the support portion 9, passing vertically through the support portion 9 and opening at the upper end. Reference numeral 11 denotes an inclined surface formed on one side of the upper end of the support portion 9, and is inclined at an angle of about 45° with respect to the upper end surface of the support portion 9. Reference numeral 12 denotes a screw hole, which is inclined at an angle of about 45° with respect to the press-fit hole 10, its outer end opens into the inclined surface 11, and its inner end opens into the press-fit hole 1.
It communicates with 0.

A sleeve 13 is made of brass. A support hole 14 is formed through the center of the sleeve 13, and the upper end of the support hole 14 is enlarged in diameter and has a threaded groove formed on its inner peripheral surface to form a threaded hole 15. . This sleeve 13
The outer diameter of the support portion 9 is approximately equal to the inner diameter of the press-fit hole 10 formed in the support portion 9, but the middle portion of the outer periphery is shaved off to form a substantially pestle shape, thereby forming the thin wall portion 16. is formed, and the thin part 16
is designed to be elastically deformable. Therefore, the thickness of this thin portion 16 is approximately 0.2 mm.

Therefore, the sleeve 13 is
It is press-fitted and fixed into a press-fit hole 10 formed in .

Reference numeral 17 denotes a fastening screw, which is provided with an engagement hole 18 with a regular hexagonal cross section that opens on the base end surface, and the peripheral edge of the tip is chamfered at an angle of approximately 45°, and has an annular inclined surface 19. It is formed. The fastening screw 17 is screwed into the screw hole 12 formed in the support portion 9, and the inclined surface 19 formed at the tip thereof is brought into contact with the outer peripheral surface of the thin wall portion 16 provided on the sleeve 13. It's getting old.

Thus, the support shaft 3 of the tape guide 2 is fitted into the support hole 14 of the sleeve 13, and the screw shaft portion 7 of the tape guide 2 is screwed into the screw hole 15 provided at the upper end of the support hole 14. Ru. Then, the height of the guide roller 6 is adjusted by screwing in or unscrewing the screw shaft portion 7 into the screw hole 15. When the height of the guide roller 6 reaches a predetermined height, the screw shaft 7 screwed into the screw hole 12 is Further screw in the screw 17 so that its tip (slanted surface 19) is pressed against the outer surface of the thin walled portion 16 of the sleeve 13,
The thin wall portion 16 is elastically deformed, whereby the support shaft 3 is held under pressure on the inner surface of the thin wall portion 16, thereby locking the guide roller 6 at a predetermined height.

In the tape guide support device 1 described above,
Since the fastening screw 17 is provided at an angle with respect to the support hole 14, its base end can be seen from above, which has the advantage that fastening work is extremely easy to perform.

In addition, the fastening screw 17 has its tip directly connected to the support shaft 3.
Because it is not pressed against the support shaft 3 through the thin wall part provided in the sleeve 13,
There is no risk of damaging the support shaft 3, and furthermore, the moment in the rotational direction of the support shaft 3 that appears at the tip of the fastening screw 17 when tightening the fastening screw 17 is not transmitted to the support shaft 3. This state will not be disturbed when tightening the fastening screw 17, and extremely accurate adjustment can be performed.

As shown in the figure, an inclined surface 19 is formed at the tip of the fastening screw 17, and the inclined surface 19
When it comes into pressure contact with the outer peripheral surface of the thin wall portion 16,
The state of contact between the tip of the fastening screw 17 and the outer peripheral surface of the thin wall portion 16 is a line contact, and the fastening screw 17 is in contact with the thin wall portion 16.
The support shaft 3 can be held more reliably by reducing the surface pressure applied to the thin part 16.
This has the effect of preventing plastic deformation and increasing the durability of the device.

Effects of the Invention As is clear from the above description, the guide member supporting device of the present invention forms a support hole through which the support shaft extending from the guide portion of the guide member is inserted, and A threaded hole extending diagonally is formed, a thin part capable of elastic deformation is formed between the tip of the threaded hole and the support hole, and the tip of the fastening screw threaded into the threaded hole is inserted through the thin part. It is characterized in that the support shaft inserted through the support hole is pressed by the support shaft.

Therefore, according to the present invention, since the screw hole into which the fastening screw is screwed is formed diagonally with respect to the support hole, it is possible to arrange the outer end of the screw hole at a position where it is easy to operate the fastening screw. This greatly improves work efficiency. In addition, since the tip of the fastening screw indirectly presses against the support shaft through the thin wall part, the fastening screw does not damage the support shaft, and after completing the position adjustment of the guide member, the fastening screw can be removed. It has many advantages, such as eliminating the risk of damaging the adjusted state when tightening.

In the above embodiment, a sleeve is used and a thin wall portion is provided on the sleeve, but it is not necessarily necessary to have such a structure, and as a result, there is a thin wall between the tip of the fastening screw and the support shaft It suffices if a thin walled portion that can be elastically deformed is provided.
Further, even when a sleeve is used, as described above, it is not necessary to form the thin wall portion over the entire circumference, and the thin wall portion may be formed only at the portion where the fastening screw comes into contact.

Further, in the above description, an embodiment has been shown in which the present invention is applied to a support device for a tape guide, but the present invention is not limited to this, but can be applied to a support device for various guide members that require position adjustment in the axial direction. It can be applied as

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an example of a conventional guide member supporting device, and FIG. 2 is a longitudinal sectional view showing an example of an implementation of the guide member supporting device of the present invention. Explanation of symbols, 1... Guide member support device, 2...
...Guide member, 3...Support shaft, 6...Guide part,
12...Threaded hole, 14...Support hole, 16...Thin wall portion, 17...Fastening screw.

Claims (1)

[Claims] 1. Forming a support hole through which a support shaft extending from the guide portion of the guide member is inserted, forming a screw hole extending obliquely to the axis of the support hole, and connecting the tip of the screw hole with the support hole. A thin wall portion capable of elastic deformation is formed in between, and the tip of the fastening screw screwed into the screw hole presses the support shaft inserted into the support hole through the thin wall portion. Guide member support device.