JPH018728Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Technical Field of the Invention The present invention relates to an attachment/detachment mechanism for equipment, and particularly to an attachment/detachment device that can be attached and detached quickly and accurately.

(2) Background of the technology In various electronic devices such as ultrasonic diagnostic equipment, the main body of the device is the attached member, and there are cases where an operating arm or a column for supporting other parts is attached and removed as the attached member. There are many. In such locations, in order to increase the operating efficiency of the equipment, it is important not only to securely fix the attachment member to the member to be attached, but also to be able to easily attach and detach the attachment member.

(3) Prior Art and Problems Figures 1 to 5 are diagrams showing attachment/detachment mechanisms for various devices that have been used in the past. Among these, the attachment/detachment mechanism shown in FIG. 1 has a screw hole 3 in the main body of the device, that is, a member to be attached 1, and a screw portion 4 in the attachment member 2 having a shaft structure, and the screw portion 4 is inserted into the screw hole 3. It is made by screwing together. The attachment/detachment mechanism shown in FIG. 2 is provided with a hole 5 in a member 1 to be attached, and a screw hole 6 extending perpendicularly to the axis of the hole 5 and communicating with the hole 5. is inserted and tightened and fixed with the screw 7. The attachment/detachment mechanism shown in FIG.
A locking hole 8 extending perpendicular to the axis of the mounting member 2 and communicating with the hole 5 and having a threaded portion 9 at the proximal opening portion is provided, while a recess 10 is formed in the mounting member 2. is inserted into the hole 5, and a ball 11 that engages with the recess 10 and a spring 12 that biases the ball 11 are installed in the locking hole 8 and are supported by a screw member 13. Furthermore, the fourth
The attachment/detachment mechanism shown in FIG. 5 and FIG.
4, and the holding part 1a is provided with a cut 15 extending radially outward from the hole 5 to the outer periphery, and a stepped notch 16 and a screw hole 17 are formed near this cut 15. The mounting member 2 is inserted into the hole 5 of 1a, the screw 18 is screwed into the screw hole 17, and the mounting member 2 is tightened and fixed.

However, among the various conventional attachment/detachment mechanisms, the attachment/detachment mechanisms shown in FIGS. 1, 2, 4, and 5 are capable of reliably connecting the attached member 1 and the attachment member 2. Although there are advantages, there is a problem in that it is difficult to easily and quickly attach and detach both members. On the other hand, although the attachment/detachment mechanism shown in FIG. 3 is relatively easy to attach and detach, it has a problem in that it cannot be firmly fastened.

(4) Purpose of the invention The present invention was made by focusing on the above-mentioned conventional problems, and its purpose is not only to ensure the connection between the mounting member and the mounted member, but also to connect the mounting member to the mounted member. It is an object of the present invention to solve the above-mentioned conventional problems by providing a device attachment/detachment mechanism that can easily and quickly attach and detach the attachment member of the device.

(5) Structure of the invention In order to achieve the above object, the invention provides an attachment/detachment mechanism for equipment consisting of a member to be attached and a mounting member that is engaged and fixed to the member to be attached. and a locking portion that protrudes radially outward from the intermediate portion of the shaft portion and has an inclined surface with respect to the rotational direction of the shaft portion. A dowel hole through which the stop portion can freely move in and out, a groove portion in which the lock portion fitted into the dowel hole can rotate about an axis while being gradually pressed against the inclined surface thereof, and a mounting member for the dowel hole. A positioning hole is formed into which the shaft portion below the locking portion is inserted when the locking portion is inserted into the alignment hole, and the locking portion and the groove portion are connected to each other when the mounting member is covered with the locking portion inserted into the alignment hole. The gist of the device is that it is locked by a locking force generated by a wedge action between the locking portion and the pressure contact surface of the groove portion when the locking member is rotated relative to the mounting member.

(6) Embodiments of the invention Hereinafter, embodiments of the invention will be described in detail with reference to the attached drawings.

6 to 8 are diagrams showing a first embodiment of the present invention. The attachment/detachment mechanism according to this embodiment includes a member 20 to be attached and a mounting member 21 that is engaged and fixed to the member 20 to be attached. The mounted member 20 corresponds to, for example, a probe of an ultrasonic diagnostic apparatus, and the mounting member 21 corresponds to an arm portion.

The mounting member 21 includes a shaft portion 22 and a pair of mounting members provided at an intermediate portion extending a predetermined height H from the base end 22a of the shaft portion 22 and protruding outward from the shaft portion 22 in radial directions opposite to each other. It has a locking part 23. The locking portion 23 is made of a plate-like member, and the seventh
A tapered structure having a thin plate part 23a and a thick plate part 23b in the width direction as shown in FIG. Molded into a structure.
The thickness of the thin plate parts 23a and 23c is set to t, while the thickness of the thick plate parts 23b and 23d is set to T, and an inclined surface is formed between them.

On the other hand, the mounted member 20 has a surface on which the mounting member 21 is attached, which can be fitted by moving the shaft portion 22 and the locking portion 23 of the mounting member 21 in the direction of the center line of the shaft portion 22. Dowel hole 24 and this dowel hole 2
4 and the groove 25 formed at the inner position of the dowel hole 2
A positioning hole 26 is formed in the bottom surface of the groove portion 25 into which the base end portion 22a of the shaft portion 22 is inserted when the mounting member 21 is inserted into the groove portion 25. Matching hole 24
has a planar structure that is approximately the same as or slightly larger than the planar structure of the locking portion 23 and the portion of the shaft portion 22 to which it is attached, so that the mounting member 21 can be inserted relatively easily. The groove portion 25 is
In FIG. 6, the space is expanded in the horizontal direction somewhat larger than the amount of protrusion of the locking part 23 from the shaft part 22, and is centered around the rear shaft part 22 where the mounting member 21 is fitted into the dowel hole 24. It is designed to be able to rotate. Further, the depth d of the groove portion 25 is the same as that of the thick plate portion 2 of the locking portion 23.
The dimensions are set to be approximately the same as or slightly smaller than the thickness T of 3b and 23d. Further, the depth of the positioning hole 26 is determined by the depth of the positioning hole 26 at the base end 22a of the mounting member 21.
It is set to be approximately the same as, or slightly larger than, the height dimension H from to the attachment position of the locking portion 23. Furthermore, this positioning hole 26 and the mounting member 2
The base end portion 22a of the shaft portion 1 is set in a fit-to-fit relationship, so that when the mounting member 21 is mounted, the shaft precision between the mounting member 21 and the member to be mounted 20 is accurately determined.

With this configuration, when the mounting member 21 is inserted into the mounted member 20 through the alignment hole 26, the mounting member 21 is positioned by the fit between the shaft tip 22a and the positioning hole 26. Thereafter, when the mounting member 21 is rotated relative to the mounted member 20 in the direction indicated by the arrow S in FIG. The thick plate portions 23b and 23d bite into the groove portion 25, whereby the attachment member 21 is firmly attached and fixed to the member to be attached 20.

9 and 10 are diagrams showing a second embodiment of the present invention. In this embodiment, the mounting member 21 has a shaft portion 22 and a small diameter portion 22b integrally formed by cutting the distal end of the shaft portion 22 into a stepped shape, and a stepped portion 22c in the middle portion of the small diameter portion 22b. The locking portion 27 is attached at a predetermined distance h from the holder. The locking portion 27 is the same as the locking portion 23 in the first embodiment.
Almost similarly, it is made of a plate-like member and has a tapered or mountain-shaped structure having a thin plate part and a thick plate part in the width direction.

Further, as in the first embodiment, the mounting member 20 has a mating hole 24 in which the locking portion 27 of the mounting member 21 can be fitted, on the side on which the mounting member 21 is mounted, and It has a groove 25 formed inside the hole 24 and a positioning hole 26 bored approximately in the center of the bottom surface of the groove 25. The matching hole 24 is connected to the locking portion 27 of the shaft small diameter portion 22b.
It has a shape that is almost the same as or slightly larger than the part to which the mounting member 21 is attached, so that the mounting member 21 can be easily inserted into the groove 2.
It is designed so that it can be inserted into 5. Groove 25
The locking portion 27 has a sufficient horizontal expansion space and the locking portion 27 can rotate within the groove portion 25.
It has a depth dimension larger than the thickness dimension of 7. On the other hand, the thickness h ₁ of the eaves portion 20a of the attached member 20 that covers the groove portion 25 from above is approximately the same as or greater than the distance h from the stepped portion 22c of the mounting member 21 to the locking portion 27. It is set to a slightly larger thickness. Further, the depth of the positioning hole 26 is determined by the depth of the shaft small diameter portion 21 when the mounting member 21 is attached to the mounted member 20.
The depth is set to be sufficient so that b does not hit the bottom of the positioning hole 26. Further, the positioning hole 26 and the small diameter portion 22b of the mounting member 21 are set in a fit-to-fit relationship, so that the axial accuracy between the mounting member 21 and the mounted member 20 is accurately determined when the mounting member 21 is mounted. There is.

Therefore, in this embodiment, when the mounting member 21 is inserted into the mounted member 20 through the alignment hole 24, the mounting member 21 is accurately aligned due to the fit between the small diameter portion 22b and the positioning hole 26. At the same time, the stepped portion 22c comes into contact with the mounting surface of the mounted member 20, thereby positioning the mounting member 21 in the vertical direction. In this state, attach the attachment member 21 to the attachment target member 20.
On the other hand, if the mounting member 20 is relatively rotated around the axis, the eaves portion 20a of the mounting member 20 will bite firmly between the step portion 22c and the locking portion 27 of the mounting member 21, and thereby the mounting member 21 will not be mounted. It is fixed to member 20.

FIG. 11 is a diagram showing a third embodiment of the present invention. The attachment/detachment device according to this embodiment includes a shaft portion 22 having a small diameter portion 22b at the tip side portion, and a shaft portion 22 having a small diameter portion 22b at the tip side portion.
A mounting member 20 consisting of a locking portion 27 attached to the
, the alignment hole 24 , the groove 25 , and the positioning hole 26
This is similar to the second embodiment described above in that it is engaged with and attached to the attached member 20 formed with the above-described second embodiment. but,
Unlike the second embodiment, when the spring 28 is loaded into the bottom of the positioning hole 26 and the attachment member 21 is attached to the attached member 20, the shaft portion 22 is attached to the small diameter portion 20.
The spring 28 is brought into contact and compressed at the tip of b. As a result, when attaching the attaching member 21 to the attached member 20, the impact between the two members due to the weight of the attaching member 21 is softened, while the spring 28 works to push up the attaching member 21 during removal work. Work efficiency can be improved.

Furthermore, in this embodiment, the shaft portion 2 of the mounting member 21 is
A protrusion 29 extending radially outward is provided on the side surface of 2, and locking holes 30 and 31 are opened from this protrusion 29 to the member to be attached 20.
The mounting member 21 and the member to be mounted are locked together in the rotational direction by pins 32 inserted into the holes 0 and 31. The pin 32 is disposed in the locking hole 31 and is connected to the lever 3 provided outside the protrusion 29.
3 via a pin rod 34. A spring 3 is inserted between the pin 32 and the upper surface of the locking hole 31.
5 is interposed to press the pin 32 downward at all times.

Therefore, when the mounting member 21 is inserted into the mounted member 20 through the alignment hole 24, the mounting member 2
1 is inserted into the mounted member 20 in a state in which the axis is accurately aligned in the horizontal direction by the fit between the small diameter portion 22b and the positioning hole 26, and the stepped portion 22c is inserted into the mounted member 20 when the mounted member 20 is attached. abutting and mounting member 21
Performs vertical positioning. In this state, if the mounting member 21 is rotated relative to the mounted member 20 around the axis, the eaves portion 2 of the mounted member 20
0a becomes firmly wedged between the step portion 22c of the mounting member and the locking portion. Then, when the two members are rotated by the optimum amount to connect the two members, the locking hole 31 becomes the locking hole 30.
, the pin 32 is lowered to the boundary between the locking holes 30 and 31 by the action of the spring 35, and fixes the mounting member 21 and the mounted member 20 in the rotational direction. This restricts relative rotation between the mounting member 21 and the mounted member 22, and it is possible to maintain an accurate rotation angle relationship at all times.

(7) Effects of the invention As explained above, according to the invention, a locking part is provided on the mounting member, and a mating hole through which the locking part can freely move in and out and a locking part are press-contacted with the mounted member. When the mounting member is rotated relative to the mounted member with the locking portion inserted into the alignment hole, the locking portion and the groove portion are locked. Since the part is configured to be locked in the groove by a wedge action, the attachment member can be quickly and accurately attached to and detached from the attached member, and the attachment member and the attached member can be firmly connected. Various effects can be obtained.

Further, according to the present invention, the locking portion of the mounting member is provided in the middle portion of the shaft portion, and the mounting member is provided with a positioning hole into which the shaft portion below the locking portion is inserted. When the shaft is installed, the shaft fits into the positioning hole, which increases the stability of the shaft and increases the mounting accuracy.

[Brief explanation of drawings]

Figure 1 is a diagram showing a conventional example of a device attachment/detachment mechanism;
Figure 2 is a diagram showing a second conventional example of a device attachment/detaching mechanism, Figure 3 is a diagram showing a third conventional example of a device attachment/detachment mechanism, and Figure 4 is a fourth conventional example of a device attachment/detachment structure. 5 is a sectional view of the conventional example shown in FIG. 4, FIG. 6 is an exploded perspective view showing the attachment and detachment structure of the device according to the first embodiment of the present invention, and FIG. 7 is a sectional view of the conventional example shown in FIG. FIG. 8 is a diagram showing the cross-sectional structure of the locking portion in Example 1.
9 is a perspective view of the mounting member used in the second embodiment of the present invention, FIG. 10 is a coupling diagram of the second embodiment, and FIG. 11 is a combination diagram of a third embodiment of the present invention. 1, 20... Attached member, 2, 21... Attaching member,
22...Shaft part, 23, 27...Locking part, 24...Matching hole, 25...Groove part, 26...Positioning hole.

Claims (1)

[Claims for Utility Model Registration] In an attachment/detachment mechanism for equipment consisting of a member to be attached and a mounting member that is engaged and fixed to the member to be attached, the attachment member includes a shaft portion and an intermediate portion of the shaft portion. A locking portion that protrudes outward in the radial direction and has an inclined surface with respect to the rotational direction of the shaft portion is formed, and a fitting portion is formed on the attached member through which the locking portion of the mounting member can freely move in and out. a hole, and a groove portion in which a locking portion fitted into the mating hole can rotate about an axis while being gradually pressed into contact with the inclined surface thereof;
When the mounting member is inserted into the dowel hole, a positioning hole is formed into which the shaft portion below the locking portion is fitted, and the locking portion and groove are connected to each other when the locking portion is inserted into the dowel hole. When the mounting member is rotated relative to the mounted member, the device is locked by a locking force generated by a wedge action between the locking portion and the pressure contact surface of the groove portion. Attachment and detachment device.