JP7115952B2 - stepless adjustment bush - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stepless adjustment bush capable of holding a shelf board and steplessly adjusting its height (position).

Conventional stepless adjustment bushings, as disclosed in Patent Document 1, are hard bushings that are inserted between the inner surface of a receiving hole in a shelf board and the outer surface of a support for a metal pipe that is inserted into the receiving hole. A shelf support bush that is a resin molded part,
The inner peripheral surface of the shelf receiving bushing is provided with a soft resin molded portion that is fixed to the outer surface of the support by frictional force without providing a rib protruding toward the support.

Therefore, according to Patent Document 1, when a shelf board is attached to a post, the post is inserted into the receiving hole of the shelf board, and at that time, the half-divided shelf receiving bush is inserted into the receiving hole of the shelf board. By fitting between the inner surface and the outer surface of the post that is inserted into the receiving hole, the soft resin molded portion of the inner peripheral surface of the shelf receiving bush allows the post to be attached without providing a rib protruding toward the post. It is said to be held fixed against the outer surface by frictional force and is easy to install.

JP 2012-100920 A

However, when the divided shelf support bush is actually used, it is not fixed and held by the soft resin molded portion against the outer surface of the column by frictional force. Since the force in the direction of opening the bushing itself is greater than the frictional force, it is not always possible to stably fix and hold the bushing.

In addition, the divided bushing cannot be easily attached to the soft resin molded part, and structural improvement is absolutely necessary so that it can be attached with one touch.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stepless adjustment bush which is a divided bush, can be stably fixed and held even when a force acts in the opening direction, and can be structurally locked with one touch.

In order to achieve the above object, the present invention
The main body frame and the operation frame that can be locked with respect to the main body frame are provided with a hard resin molded part,
The body frame is
a cylindrical frame supporting the struts in the upper part;
Having a second cylindrical frame that has a larger diameter than the cylindrical frame and supports the support on the lower side,
Having an opening hole on the front side of the second cylindrical frame that opens from the left side of the second cylindrical frame to the right side through the intermediate part,
The operation frame is
A closing body for closing the opening hole is provided, and a lower end portion of the closing body is provided with a pivotal support section for pivotally supporting the closing body so as to be able to open and close. One tongue-shaped portion is provided on the front side of the two operating rods that are pivotally supported by the shaft support portion, and the tongue-shaped portion is pushed downward on the rear side of the operating rod when the opening hole is closed. The second shaft support portion is rotated to move and lock the rear end portion of the operating rod,
The soft resin molded part is
A part is inserted in the second cylindrical frame in the circumferential direction, the remaining part is inserted in the closing body in the circumferential direction, and divided into a part of the soft resin molded part and the remaining part of the soft resin molded part. It is a stepless adjustment bush that becomes a molded soft resin part.

Although the lock is not limited, it is preferable that the rear end portion of the operating rod and the upper wall portion of the second cylindrical frame can be engaged and disengaged.

In addition, although not limited, the rear end of the operation lever is a hook-shaped portion, and this can be achieved by providing a projection on the upper wall portion of the second cylindrical frame with which the hook-shaped portion can be engaged and disengaged.

It is more preferable that the cylindrical frame has a longitudinal slit formed in the wall surface thereof in the axial direction, and that the longitudinal slit has an opening area that increases toward the opening end thereof.

It can be said that it is preferable that the outer peripheral surface of the soft resin molded portion is formed along the uneven cross-sectional shape of the inner side of the second cylindrical frame.

When using the adjusting bush of the present invention, when attaching the support, the support is inserted from the lower opening of the cylindrical frame of the adjusting bush, the second cylindrical frame is led out to the upper opening, and set to an appropriate length. Then, the closing member of the adjustment bush closes the opening hole according to the length thereof, and at the same time, the tongue-shaped portion is pushed downward, so that the rear end portion of the operation rod is moved by the rotation of the second shaft support portion. It can be moved and locked with one touch.

Moreover, in the present adjusting bush, a part of the soft resin molded portion is circumferentially provided inside the second cylindrical frame, and the remaining part of the soft resin molded portion is circumferentially provided inside the closing body, so that it can be divided. Even if the force in the opening direction is applied in the circumferential direction of the adjusting bush, if the rear end portion of the operating rod and the upper wall portion of the second cylindrical frame can be engaged and disengaged, the locking is confirmed. Therefore, it can be stably fixed and held. In this case, the cylindrical frame has a vertical slit in the wall surface in the axial direction. It is positively locked on both sides of the frame and the lower second cylindrical frame.

1 is a perspective view of an unlocked state showing an embodiment of the present invention; FIG. FIG. 2 is a perspective view of the same embodiment in FIG. 1 in a locked state; It is a left side view showing the same embodiment in a locked state. It is a front view which shows the same embodiment in a locked state. It is a right side view showing the same embodiment in a locked state. It is a top view which shows the same embodiment in a locked state. It is a bottom view which shows the same embodiment in a locked state. It is a rear view which shows the same embodiment in a locked state. It is a left view which shows the same embodiment of the main body frame in the state which removed the operation frame. It is a front view which shows the same embodiment. It is a right view which shows the same embodiment. It is a top view which shows the same embodiment. It is a bottom view which shows the same embodiment. It is a rear view which shows the same embodiment. It is a top view which shows the same embodiment which comprises a part of soft resin molding part inserted in the 2nd cylindrical frame. It is a bottom view which shows the same embodiment of the same soft resin molded part. It is a rear view which shows the same embodiment of the soft resin molding part. It is a top view which shows the same embodiment which comprises the remainder of the same soft resin molding part which comprises the inside of a closure. It is a rear view which shows the same embodiment.

FIG. 1 is a perspective view of an unlocked state in one embodiment of the stepless adjustment bushing of the present invention. FIG. 2 is a perspective view of the same embodiment in FIG. 1 in a locked state.
1 and 2, 1 is a body frame, and 2 is an operation frame that can be locked with respect to the body frame 1. As shown in FIG. Both are made of hard resin molded parts.

The body frame 1 has a cylindrical frame 10 and a second cylindrical frame 100 . The cylindrical frame 10 supports columns on its upper side, while the second cylindrical frame 100 supports columns on its lower side. The second cylindrical frame 100 has a larger diameter than the cylindrical frame 10 .

1 and 2 and FIGS. 4-1 to 4-6, the front side of the second cylindrical frame 100 is opened from the left side 101 of the second cylindrical frame 100 to the right side 103 via the intermediate portion 102. It has an open hole 104 .

On the other hand, in FIGS. 1 and 2 and FIGS. 3-1 to 3-6, the operation frame 2 has a closing member 200 that closes the opening hole 104 of the second cylindrical frame 100. The closing member 200 A lower end portion 201 has a shaft support portion 202 that supports the closing member so as to be openable and closable. The right side 203 and the left side 204 of the closing member 200 have two operating rods 205 and 206 supported by a second support 208, respectively, and a tongue 207 is provided on the front side thereof. At the rear side of the operating rods 205 and 206, the tongue-shaped portion 207 is pushed downward when the opening hole 104 is closed, so that the rear ends of the operating rods 205 and 206 are moved by the rotation of the second shaft support portion 208. It is configured to move and lock the parts 209 and 210 .

The lock is engaged between the rear ends 209, 210 of the operating rods 205, 206 and the upper wall 105 of the second cylindrical frame 100 in FIGS. 1 and 2 and FIGS. 3-1 to 3-6. Detachably achieved. Specifically, rear end portions 209 and 210 of the operating rods 205 and 206 are hook-shaped portions 211 and 212, and the cylindrical frame 10 has axial longitudinal slits 11 and 12 formed in the wall surface thereof. The opening areas of the vertical slits 11 and 12 increase from the lower open end 13 to the upper open end 14 . Moreover, the vertical slits 11 and 12 are provided facing each other by 180°.

On the other hand, as shown in FIGS. 3-1 to 3-5, the soft resin molded portion 300 has a portion 301 inserted in the second cylindrical frame 100 in the circumferential direction of the cross section, and a remaining portion 302 in the circumferential direction. are interposed within the closure 200 . Therefore, the soft resin is divided into a part 301 of the soft resin molded part 300 and a remaining part 302 of the soft resin molded part 300 .

Therefore, when the adjusting bush of the present invention is used, when attaching the support, the support is inserted through the lower opening 1A of the second cylindrical frame 100 of the adjusting bush, as shown in FIGS. 10 from the upper opening 1B and set to an appropriate length, the closing body 200 of the adjustment bush is closed in the opening hole 104 according to the length, and the tongue 207 is directed downward. By pushing away, the rear end portions 209 and 210 of the operation rods 205 and 206 can be moved by the rotation of the second shaft support portion 208 and locked with one touch.

Therefore, in this adjusting bush, a part 301 of the soft resin molded portion is provided inside the second cylindrical frame 100 in the circumferential direction, and the remaining portion 302 of the soft resin molded portion is provided in the closing body 200 in the circumferential direction. Since it is internally installed, even if a force in the opening direction is applied in the circumferential direction by the divided adjusting bushes, the rear end portions 209 and 210 of the operating rods 205 and 206 and the second cylindrical frame 100 will not be closed. When the wall portion 105 can be engaged and disengaged, the lock is confirmed, so that it can be stably fixed and held. In this case, the cylindrical frame 10 has axial vertical slits 11 and 12 formed in the wall surface, and the vertical slits 11 and 12 have opening areas that increase from the lower open end 13 to the upper open end 14 . With this configuration, the adjusting bush is reliably locked on both sides of the upper cylindrical frame 10 and the second cylindrical frame 100 on the lower side.

The invention is not limited to the above examples. For example, the rear end portions 209 and 210 of the operating rods 205 and 206 are hook-shaped portions 211 and 212, and the hook-shaped portions 211 and 212 are provided with projections 213 and 214 that can be engaged and disengaged from the upper wall of the second cylindrical frame 100. As for the configuration provided in the portion 105, in short, there is no problem as long as the rear end portions 209 and 210 of the operating lever 205 and the upper wall portion 105 of the second cylindrical frame 100 can be engaged and disengaged.

Further, for example, the cylindrical frame 10 has axial vertical slits 11 and 12 in the wall surface, but the vertical slits 11 and 12 may not be formed. Further, it is not necessary to increase the opening area from the lower opening end of the vertical slits 11 and 12 to the upper opening end.

The rear side of the second cylindrical frame 100 has an uneven cross-sectional shape, and the outer peripheral surface of the soft resin molding part is formed along the uneven cross-sectional shape. There is no problem even if the cross-sectional uneven shape portion is not used. However, if the rear side of the second cylindrical frame 100 is formed as a concave-convex cross-sectional portion, the soft resin molded portion 300 is fixed at a fixed position even if a force acts in the circumferential direction.

In the adjustment bushing of the present invention, when the post is attached, the post is inserted from the lower opening of the cylindrical frame of the adjustment bush, the second cylindrical frame is led out to the upper opening, and set to an appropriate length. By closing the opening hole with the closing body of the main adjusting bush according to its length and simultaneously pushing the tongue-shaped portion downward, the rear end portion of the operating rod is moved by the rotation of the second shaft support portion. can be locked with a single touch.

Moreover, in the present adjusting bush, a part of the soft resin molded portion is circumferentially provided inside the second cylindrical frame, and the remaining part of the soft resin molded portion is circumferentially provided inside the closing body, so that it can be divided. Even if the force in the opening direction is applied in the circumferential direction of the adjusting bush, if the rear end portion of the operating rod and the upper wall portion of the second cylindrical frame can be engaged and disengaged, the locking is confirmed. Therefore, it can be stably fixed and held. In this case, the cylindrical frame has a vertical slit in the wall surface in the axial direction. It is securely locked on both sides of the frame and the lower second cylindrical frame.

1 Body Frame 10 Cylindrical Frame 11 Vertical Slit 12 Vertical Slit 13 Lower Opening End 14 Upper Opening End 100 Second Cylindrical Frame 101 Left Side Part 102 Middle Part 103 Right Side Part 104 Opening Hole 105 Upper Wall Part 200 Closing Body 201 Lower Side End 202 Shaft 205 Operating rod 206 Operating rod 207 Tongue 208 Second shaft 209 Rear end 210 Rear end 211 Hook 212 Hook 300 Soft resin molding 301 Part 302 Remainder

Claims (5)

The main body frame and the operation frame that can be locked with respect to the main body frame are provided with a hard resin molded part,
The body frame is
a cylindrical frame supporting the struts in the upper part;
A second cylindrical frame, which has a diameter larger than that of the cylindrical frame and supports a support column on the lower side, is connected to the frame,
Having an opening hole on the front side of the second cylindrical frame that opens from the left side of the second cylindrical frame to the right side through the middle part,
The operation frame is
A closing body for closing the opening hole is provided, and a lower end portion of the closing body is provided with a pivotal support section for pivotally supporting the closing body so as to be able to open and close. A tongue-shaped portion is provided on the front side of the two operating rods that are pivotally supported by the shaft support portion, and the tongue-shaped portion is pushed downward on the rear side of the operating rod when the opening hole is closed, so that the second operating rod is pushed downward. It is configured to move and lock the rear end of the operation lever by rotating the two-shaft support,
A part of the soft resin molded part is inserted in the second cylindrical frame in the circumferential direction, and the remaining part is inserted in the closed body in the circumferential direction. A stepless adjustment bush that becomes a soft resin molded part divided by the resin molded part. 2. The stepless adjustment bushing according to claim 1, wherein said lock is such that a rear end portion of said operating rod and an upper wall portion of said second cylindrical frame can be engaged and disengaged. 3. The stepless adjustment bushing according to claim 2, wherein the rear end portion of said operating rod is a hook-shaped portion, and a projection with which said hook-shaped portion can be engaged and disengaged is provided on said upper wall portion of said second cylindrical frame. 4. The stepless step according to any one of claims 1 to 3, wherein the cylindrical frame has an axial longitudinal slit in the wall surface, and the longitudinal slit has an opening area that increases from the lower opening end to the upper opening end. adjustment bush. 5. The apparatus according to any one of claims 1 to 4, wherein the rear side of the second cylindrical frame has an uneven cross-sectional shape, and the outer peripheral surface of the soft resin molding part is formed along the uneven cross-sectional shape. Stepless adjustment bush.

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