JPH0721994Y2 - Stand head angle adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a device for adjusting the angle of the head of a music stand, a microphone stand, a musical instrument stand, or the like.

<Prior art> Conventionally, in order to adjust the angle of the head of a music stand, microphone stand, musical instrument stand, etc. according to the usage condition, a support member for supporting the music rest part, etc., and a mounting member for attaching to the stand Was set to a desired angle, both members were tightened with screws or the like, and both were locked only by the friction of the contact surface between the mounting member and the supporting member.

<Problems to be Solved by the Invention> However, if the both are locked only by the friction between the contact surfaces of the supporting member and the mounting member as in the prior art, the weight of the supporting member is limited.

In other words, in the music stand, if a large amount of music is placed on the music rest mounted on the support member, the music rest will rotate due to the weight of the music, and the music rest will not function as a music stand. It was Further, in order to lock the music sheet placing portion to the mounting member, it is necessary to firmly tighten the screws and the like, and a considerable force is required at the time of tightening and loosening.

Further, since the rotation range of the support member is not regulated at all, when the screw loosens and the support member rotates, the music score placement part also rotates, and the placed music score falls.

This was also the case with microphone stands, musical instrument stands, and the like.

In order to eliminate such drawbacks, a musical instrument support using a lock nut is described in Japanese Utility Model Publication No. 56-164290. However, since this support tool also utilizes only the fastening force of the nut, sufficient strength cannot be guaranteed. Also, an angle adjusting device for a stand that uses ring-shaped teeth is described in the publication of Kokai Kai 60-145490, but a tension adjusting device that uses a buffer spring is required, and the adjustment angle is fixed. Can not.

Therefore, there is a demand for an angle adjusting device that has an extremely simple structure, can easily regulate the rotation range, and can increase the fastening force extremely.

<Means for Solving the Problems> The present invention has been proposed in order to solve the above-mentioned conventional drawbacks and to satisfy the conventional demands.
At least an attachment member for rotatably attaching the support member and a screw rod for connecting the support member and the attachment member are provided, and the support member has an open side of a bowl-shaped fastening portion extending from the substrate. First locking groove is provided in the
And a circular arc-shaped restricting projection centered on the first screw insertion hole is provided on the inner peripheral surface of the inner periphery of the mounting member, and the mounting member is a disk-shaped engagement provided on the stand mounting portion. A second screw insertion hole is opened in the center of the portion, and a cylindrical connecting portion having a notch on a part of the tip side is formed on the inner surface so as to be located outside the second screw insertion hole. A second engaging groove is provided so as to be located outside the connecting portion, and a spring is fitted inside the connecting portion so that the restricting protrusion is within the range of the cutout portion. It is characterized in that the support member and the mounting member are connected to each other by being inserted into the fastening portion and inserting a screw rod in series into the first screw insertion hole and the second screw insertion hole. .

<Operation> The angle of the support member can be set within the range between the restricting protrusion and the notch, and the support member is extremely strong due to the engagement between the first locking groove and the second locking groove. Can be held at.

<Example> An example of using the angle adjusting device of the present invention for a music stand will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the angle adjusting device 1 of the present invention includes a support member 3 for mounting the music score placement portion 2 and a support member 3.
It includes a mounting member 4 for mounting and a screw rod 5 for connecting the mounting member 3 and the mounting member 4.

The supporting member 3 has a substrate 6 as shown in FIGS.
And a fastening portion 7 provided upright from the back surface of the substrate 6.

The board 6 is for mounting the music sheet placing section 2, and has mounting holes 8 at four corners. To mount the music sheet placing portion 2 on the board 6, insert the screws into the attachment holes 8 provided at the four corners and screw the above-mentioned screws into the music sheet placing portion 2, or insert the rivets into the attachment holes 8. Then, it is attached to the music rest part 2 by caulking or the like.

The fastening portion 7 is composed of a bowl-shaped member extending from the substrate 6. A plurality of radial first engaging grooves 9 are provided on the open end surface of the fastening portion 7, and a first screw insertion hole 10 is opened at the center of the closed end surface. Further, a spring mounting groove 11 is provided inside the first screw insertion hole 10 on the closed side, and the inner peripheral surface on the closed end side is regulated for about a quarter round (about 90 degrees). Protrusions 12 are provided.

As shown in FIGS. 2 and 4, the mounting member 4 includes a stand mounting portion 13 and an engaging portion that stands from one end of the stand mounting portion 13.
It consists of 14.

The stand attachment portion 13 is a tubular member having one end closed, and has a screw hole 15 on its side surface.

The engaging portion 14 is made of a disk-shaped member that is erected from the closed end of the stand attaching portion 13. A second screw insertion hole 16 is formed at the center of the engaging portion 14, and a female screw portion 17 is provided on the inner peripheral surface of the second screw insertion hole 16. Further, on the inner side surface of the engaging portion 14, so as to be located outside the second screw insertion hole 16,
A cylindrical connecting portion 18 is provided upright. The outer diameter of the connecting portion 18 is slightly smaller than the inner diameter of the fastening portion 7 described above,
The inner diameter of 18 is slightly larger than the outer diameter of spring 19. The length of the connecting portion 18 is slightly shorter than the depth inside the fastening portion 7 described above. Further, a cutout portion 20 is provided on the tip end side of the connecting portion 18 over about one half round (about 180 degrees). Engagement part 1
On the inner surface of 4, a plurality of radial second locking grooves 21 are provided from the outer circumference of the connecting portion 18 toward the outside, at the same pitch as the first locking grooves 9 provided in the fastening portion 7. There is.

Therefore, in order to mount the support member 3 on the mounting member 4,
The spring 19 is fitted into the inside of the connecting portion 18 so that the restriction projection 12 of the fastening portion 7 is within the range of the notch 20 of the connecting portion 18, and the connecting portion 18 is inserted into the fastening portion 7. And the fastening portion 7
The screw rod 5 is inserted into the first screw insertion hole 10 from the end face on the closed side of the, and the tip of the screw rod 5 is inserted into the second screw insertion hole of the mounting member 4.
It may be screwed to the female screw portion 17 provided on the 16.

In order to mount the angle adjusting device 1 including the mounting member 4 and the supporting member 3 on the stand, the pole 22 of the stand is inserted from the open end side of the stand mounting portion 13 and the screw hole 15 is formed on the side surface. Screw in the screw and use the tip of the screw to pole
Tighten 22.

Also, to adjust the angle of the stand head,
Loosen the screw rod 5 screwed to the support member 3 and separate the support member 3 from the mounting member 4 by the urging force of the spring 19 so that the first locking groove 9 and the second locking groove 21 do not mesh with each other. The angle is set (Fig. 5B). Then, tighten the screw rod 5 again,
It suffices to engage both locking grooves 9 and 21 (Fig. 5A). When the support member 3 is rotated, the restriction protrusion 12 can rotate within the range of the cutout 20. Thereby, the rotation angle of the support member 3 can be regulated, and the angle can be adjusted within this range. The angle of the notch 20 or the restriction protrusion 12
By changing the angle of, the range of adjustable rotation angles can be changed.

In the present invention, the substrate 6 of the support member 3 is rotated from a substantially vertical state to a substantially horizontal state.
A notch 20 and a restricting protrusion 12 are provided. Therefore, the musical score placement portion 2 attached to the substrate 6 of the support member 3 also rotates within a range of about 90 degrees from a substantially vertical state to a substantially horizontal state.

Further, when the screw rod 5 is further loosened from the above-described restricted rotation state, the support member 3 is further separated from the mounting member 4 by the urging force of the spring 19, and the restriction protrusion 12 does not engage with the connecting portion 18. (FIG. 5C). In this state, since the rotation range of the support member 3 is not restricted at all, the rotation of the support member 3 is free and the support member 3 can be folded. Therefore, since the music score placement portion 2 attached to the support member 3 can be folded in parallel with the pole 22 of the stand, it is not bulky to carry and move.

<Effect of the Invention> As described above, according to the present invention, at least the supporting member, the mounting member for rotatably mounting the supporting member, and the screw rod for connecting the supporting member and the mounting member are provided. The supporting member is provided with a first locking groove on the open side of the bowl-shaped fastening portion extending from the substrate, and a first screw insertion hole at the center of the end on the closed side. A circular arc-shaped restricting protrusion centering on the first screw insertion hole is provided on the peripheral surface, and the mounting member has a second screw insertion hole at the center of a disk-shaped engaging portion provided on the stand mounting portion. A cylindrical connecting portion, which is opened and has a notch formed in a part on the tip side, is provided on the inner side surface so as to be located outside the second screw insertion hole, and is located outside the connecting portion. Second locking groove,
Insert the connecting part into the fastening part so that the restriction projection part fits within the cutout part by fitting a spring inside the connecting part,
It is characterized in that a screw rod is inserted in series through the first screw insertion hole and the second screw insertion hole to connect the support member and the attachment member. Therefore, since the support member and the mounting member are firmly locked by the engagement of both locking grooves, the support member does not rotate even if the screw rod is loosened a little, and a heavy musical score or musical instrument is supported by the support member. It can be firmly and securely supported, and will not tilt or drop due to its own weight during a performance. Further, the screw rod may be tightened relatively gently because the locking groove may be engaged. Therefore, no unnecessary force is needed when tightening or loosening the screw rod to adjust the angle. Furthermore, in the restricted rotation state,
Since the music rest portion attached to the base plate of the support member rotates at an angle in a range from a substantially vertical state to a substantially horizontal state, if the screw rod loosens, the support member rotates. However, since the music rest part does not rotate more than in the horizontal state, the placed music score will not fall, and both locking grooves will come out when the screw rod is sufficiently loosened, so it can be folded compactly. It is possible to achieve high practical value.

[Brief description of drawings]

The drawings show an embodiment in which the present invention is applied to a music stand. FIG. 1 is a front view of the music stand attached to the music stand, FIG. 2 is an exploded perspective view of FIG. 3, and FIG. 3A is a partially cutaway rear view, FIG. 3B is a bottom view, FIG. 3C is a side view,
FIG. 4 is a mounting member, FIG. 4A is a side view, FIG. 4B is a sectional view, and FIG. 5 is a partially cutaway rear view of a state in which a supporting member and a mounting member are combined. Figure A shows the locked state, Figure 5B
Is a restricted rotation state, and FIG. 5C is a free rotation state. In the figure, 1 is an angle adjusting device, 3 is a supporting member, 4 is a mounting member, 5 is a screw rod, 9 is a first locking groove, 10 is a first screw insertion hole, 12 is a restricting protrusion, and 14 is An engaging portion, 16 is a second screw insertion hole, 18 is a connecting portion, 20 is a cutout portion, and 21 is a second locking groove.

Claims (1)

[Scope of utility model registration request] 1. A support member, a mounting member for rotatably mounting the support member, and a screw rod connecting the support member and the mounting member, the support member extending from a substrate. A first locking groove is provided on the open side of the bowl-shaped fastening portion, a first screw insertion hole is opened at the center of the end on the closed side, and the first screw insertion hole is formed on the inner peripheral surface of the inside. A circular arc-shaped restricting protrusion is provided as a center, and the mounting member has a second screw insertion hole formed at the center of a disk-shaped engaging portion provided on the stand mounting portion, and an inner side surface of the tip side of the tip side. A cylindrical connecting portion with a notch formed in a part thereof is provided outside the second screw insertion hole, and a second locking groove is provided outside the connecting portion. Stop the connecting part by fitting a spring inside the connecting part so that the regulation projection part is within the range of the cutout part. It was inserted into the part,
An angle adjusting device for a stand head, characterized in that a screw rod is inserted in series into the first screw insertion hole and the second screw insertion hole to connect the support member and the mounting member.