JP2002061615A - Fitting device of table leg or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting device used when removably fitting a leg to a top plate of a table. SOLUTION: A projecting shaft part 6 having a cam projection 7 projected from the peripheral surface of the tip part and a return rotation inhibiting locking part 13 is provided on an insert locking means 2 fixed to the end part of a fitting member 1. A locking means 4 fitted to a portion of a main body to be fitted for fitting the fitting member 1 is provided with a shaft hole part 19 for fitting the projecting shaft part 6 of the insert locking means 2, a drawing cam face 21a for drawing the projecting shaft part 6 through the cam projection 7 when the projecting shaft part 6 fitted in the shaft hole part 19 is rotated in the normal direction at a designated angle, a movable locking claw 16 engaged with the return rotation inhibiting locking part 13 when the projecting shaft part 6 fitted in the shaft hole part 19 is rotated in the normal direction at a designated angle, and a spring 17 for energizing the movable locking claw 16 in the direction of engagement. The movable locking claw 16 is provided with an operating part 27 for locking and unlocking operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mounting a table leg or the like which can be used when a leg is removably mounted on a table top plate.

[0002]

2. Description of the Related Art As an attachment device for detachably attaching a leg to a table top plate, a screw shaft portion is fixedly protruded from the upper end of the leg, and the screw shaft portion is attached to a nut fixed to the back surface of the table top. Is generally screwed in and fixed, but the drawback is that a large amount of labor and time is required for attaching and detaching the legs since the screw shaft must be rotated many times while grasping the thick legs.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus for mounting a table leg or the like which can solve the above-mentioned conventional problems. The attachment member 1
And a main body 3 to be attached.
And a locking means 4 attached to a place where the mounting member 1 is attached. The insertion locking tool 2 includes a cam projection 7 protruding from the peripheral surface of the distal end portion and a locking portion 13 for preventing return rotation. A protruding shaft portion 6 provided with
The shaft hole 19 into which the protruding shaft portion 6 of the insertion locking tool 2 is fitted, and the cam protrusion 7 when the protruding shaft portion 6 fitted in the shaft hole portion 19 is rotated forward by a predetermined angle. Cam surface 21a for pulling in the protruding shaft portion 6 by pressing, and the shaft hole portion 1
9, a movable locking claw 16 that engages with the return rotation preventing locking portion 13 when the protruding shaft portion 6 fitted into the rotation shaft 9 is rotated forward by a predetermined angle, and the movable locking claw 16 is attached in the engaging direction. A biasing spring 17 is provided, and the movable locking claw 16 is provided with an operation portion 27 for performing a locking release operation.

In implementing the mounting device having the above-described structure, the cam projections 7 are provided point-symmetrically on both sides in the diametrical direction of the protruding shaft portion 6, and the return rotation preventing locking portion 13 is provided with both cam projections 7. Are formed symmetrically with respect to the peripheral surface of the shaft 2.
0 is formed, the cam surface 21a is continuously provided from the inner end of the concave portion 20 only in the forward rotation direction of the protruding shaft portion 6, and the cam protrusion 7 is formed when the protruding shaft portion 6 is positively rotated by a predetermined angle. The stop surface 21b to be in contact with the cam surface 21a can be provided continuously, and the movable locking claw 16 can be provided on one of the cam surfaces 21a.

In the main body 15 of the locking means 4 having the shaft hole 19 and the cam surface 21a, an inner concave groove 22 formed on the back surface side and a protruding portion provided in the inner concave groove 22 are provided. The movable locking claw 16 is provided with a retaining locking piece 25 for retaining and an outer concave groove 24 formed on the surface side so as to communicate with the outer end of the inner concave groove 22. A locking claw body portion 26 which is reciprocally movable into the inside and an operating portion 27 which protrudes into the outer concave groove portion 24. The locking claw body portion 26 includes the locking piece for retaining. 25 can be provided with a retaining hole 28 for retaining.

Further, the insertion and locking member 2 has a tapered shaft hole 12 whose inner diameter becomes smaller toward the distal end, and is configured to be able to expand in diameter by an axial slit 10. A mounting cylindrical shaft portion 8 provided on the surface is provided, and a pin 14 is inserted into the tapered shaft hole 12 in a state where the mounting cylindrical shaft portion 8 is inserted into a mounting hole 9 drilled from an end surface of the mounting member 1. By press-fitting, the diameter of the mounting cylinder shaft portion 8 is expanded by the pin 14 so that the retaining ridge 11 bites into the inner peripheral surface of the mounting hole 9, and is inserted into the mounting member 1 to fix the locking member 2. You can do it.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.
Is a mounting member such as a table leg, and the insertion locking tool 2 is mounted on the upper end thereof. Reference numeral 3 denotes a body to be mounted, such as a table top plate, on which a locking means 4 is mounted at a position where the mounting member 1 is mounted (in the vicinity of four corners on the bottom surface, etc.).

As shown in FIGS. 3 and 4, the insertion locking device 2 includes a flange portion 5 that contacts the upper end surface of the mounting member 1, and a projecting shaft portion 6 that projects upward from the flange portion 5.
And two arc-shaped cam projections 7 projecting symmetrically on both sides in the diameter direction from the outer peripheral surface of the upper end of the protruding shaft portion 6, and connected integrally downward from the flange portion 5 concentrically with the protruding shaft portion 6. And a mounting cylinder shaft portion 8 provided. Mounting shaft 8
Can be inserted into a mounting hole 9 drilled from the upper end surface of the mounting member 1 and, as shown in FIG. 4, can be expanded in diameter by axial slits 10 formed at a plurality of positions in the circumferential direction. On the outer peripheral surface of the formed tapered lower half portion 8a, circumferential retaining ridges 11 are integrally formed in a plurality of steps in the vertical direction, and the lower half portion is formed in a tapered shape in which the inner diameter becomes smaller toward the tip. The shaft hole 12 penetrates between the upper and lower ends of the insertion locking tool 2. The lower ends 7a of the two arc-shaped cam projections 7 of the insertion locking device 2 are spirally inclined, and a return rotation preventing locking portion 13 is provided at a substantially central position on the outer peripheral surface. It is carved in point symmetry.

[0011] As shown in FIG. 4, the insertion locking tool 2 having the above-described structure includes a mounting hole 9 formed from the upper end surface of the mounting member 1.
The fixing pin 1 having a diameter slightly smaller than the maximum diameter of the shaft hole 12 in a state where the lower mounting cylindrical shaft portion 8 is inserted from the flange portion 5 therein.
By tapping and press-fitting 4 into the shaft hole 12 from the upper end thereof, the tapered lower half portion 8a having the slit 10 of the mounting cylinder shaft portion 8 is expanded by the fixing pin 14 and expanded. The retaining ridges 11 on the outer peripheral surface bite into the inner peripheral surface of the mounting hole 9 and are fixed to the mounting member 1. Of course, instead of the fixing method using the fixing pin 14, the flange 5 is fixed to the upper end surface of the mounting member 1 with a plurality of wood screws, and the insertion and locking member 2 is inserted by another method.
Can be attached to the upper end of the attachment member 1.

The locking means 4 includes a main body 15 shown in FIGS. 6A, 7A, 8 and 9A, and a main body 15 shown in FIGS. 6B, 7B and 9A.
B includes a movable locking claw 16 and a spring 17. The main body 15 has an oblong plane shape in which the thickness direction is stepped so that the front (lower side) side is slightly larger. An oval recess 18 is formed at a depth to which the flange portion 5 can just fit. A shaft having a diameter at which one end of the oval recess 18 can just fit the protruding shaft portion 6 of the insertion locking tool 2. The hole 19 is formed so as to penetrate in the thickness direction. The shaft hole 19 is provided with a plurality of cutout recesses 20 into which the two arc-shaped cam protrusions 7 projecting from the protruding shaft portion 6 can be just fitted. Lateral groove portions 21 are continuously provided in the circumferential direction from the ends on the same side in the direction, and the bottom surfaces of the respective lateral groove portions 21 are formed as spirally inclined retraction cam surfaces 21a.

The two lateral grooves 21 are provided so as to oppose each other in the longitudinal direction of the main body 15, and from the central position of the lateral groove 21 on the side closer to the longitudinal central position of the main body 15,
The inner concave groove 22 for the interior of the movable locking claw exposed on the back surface (upper side surface) of the inner groove 5 is connected to the outer end (the end farther from the lateral groove 21) of the inner concave groove 22 in the thickness direction. Communication hole 2
An outer concave groove 24 communicating with the base 3 is formed in the main body 15 so as to be exposed on the surface (lower side) of the main body 15, that is, in the oval concave portion 18. Thus, the inner groove 2
2. The communication hole 23 and the outer concave groove 24 constitute a movable locking claw interior hole which is parallel to the longitudinal direction of the main body 15 and whose vertical cross-sectional shape (see FIG. 7A) is continuous in a stepwise manner. Further, a pair of left and right retaining locking pieces 25 is protruded at a position closer to the outer end (the end farther from the lateral groove 21) of the inner concave groove 22, and the inner end (the side communicating with the lateral groove 21). A small width portion 22a is formed at the end).

The movable locking claw 16 has a locking claw body portion 26 which is loosely fitted into the inner concave groove portion 22 so as to be reciprocally movable, and an operation of projecting into the outer concave groove portion 24 via the communication hole 23. The locking claw body 26 includes a locking claw 26a protruding into the lateral groove 21 through the inner end narrow portion 22a of the inner concave groove 22, and the pair of left and right stoppers. A locking hole 28 for retaining which the locking piece 25 engages, and a spring receiving hole 29 formed from the end face opposite to the side where the locking claw portion 26a is provided.

An example of a method of assembling the movable locking claw 16 having the above configuration will be described.
The main body 15 is fitted in the spring receiving hole 29 of the main body.
The movable locking claw 16 is
About half of the length from above or below, and a pair of left and right retaining locking pieces 25 on the main body 15 side are fitted into retaining locking holes 28 of the locking claw main body 26. The movable locking claw 16 is rotated so as to perform the operation. As a result, in the state where the pair of left and right retaining locking pieces 25 on the main body 15 side are deformed so as to approach each other against elasticity, the locking claw main body 2
6 through the inside of the retaining hole 28 for retaining, and by the elastic return of the retaining piece 25 for retaining, each upper retaining claw portion is formed on both sides of the upper end of the retaining hole 28 for retaining. Engage,
The movable locking claw 16 is assembled to the main body 15.

In the assembled movable locking claw 16, the locking claw 26 a of the locking claw body 26 protrudes into the lateral groove 21 through the inner end narrow portion 22 a of the inner concave groove 22. The operating portion 27 is loosely fitted in the outer groove 24, and the inner groove 22 and the outer groove 24 are within the range of movement of the retaining piece 25 for retaining in the retaining hole 28 for retaining. The locking claw portion 26a is reciprocally movable in the longitudinal direction, and is interposed in a compressed state between the outer end surface of the inner concave groove portion 22 (outer surface of the communication hole portion 23) and the locking claw portion 26a. Part 2
1 and is biased and held at an advance limit position protruding into the inside of the housing 1.

The locking means 4 assembled as described above
As shown in FIG. 1, is fitted into an embedding recess formed in advance at a predetermined position on the bottom surface of the attached main body 3 so that the surface (lower side surface) of the main body 15 is flush. FIG.
As shown in (1), using a plurality of mounting holes 30 provided around the main body 15, the main body 15 is fixed with wood screws or the like.

When the mounting member 1 is mounted on the bottom of the main body 3 to be mounted, the projecting shaft 6 of the insertion locking device 2 on the mounting member 1 side projects into the shaft hole 19 on the main body 15 side of the locking means 4. The two arc-shaped cam protrusions 7 on the shaft portion 6 are inserted so as to fit into the cutout recesses 20 on the shaft hole portion 19 side. When the insertion locking member 2 is integrally rotated with the mounting member 1 in the screwing direction around the protruding shaft portion 6, the two arc-shaped cam projections 7 on the protruding shaft portion 6 side are formed on the shaft hole portion 19 side. Notch recess 20
, Into the lateral groove portion 21 in the circumferential direction, and in this process, the lower end surface 7 a of the arc-shaped cam projection 7 is pushed up in the axial direction of the projecting shaft portion 6 by the retraction cam surface 21 a of the lateral groove portion 21. The shaft 6 is drawn into the shaft hole 19.

When the insertion locking member 2 is rotated by 90 degrees in the screwing direction about the protruding shaft portion 6 integrally with the mounting member 1, the end surfaces 7 on the screwing direction of the two arc-shaped cam projections 7.
b comes into contact with a stop surface 21b (see FIGS. 6 and 8) at one end in the circumferential direction of each lateral groove portion 21, and at the same time, is pushed away in the retreating direction against the spring 17 by one of the arc-shaped cam projections 7. Locking claw portion 26a at the tip of movable locking claw 16
When the movable locking claw 16 is returned by the urging force of the spring 17, the movable locking claw 16 is fitted to the return rotation preventing locking portion 13 of the arcuate cam projection 7. As a result, the rotation of the mounting member 1 (insertion locking member 2) in the direction opposite to the screwing direction around the protruding shaft portion 6 causes the locking claw portion 26a at the tip of the movable locking claw 16 and the arc to rotate. It is prevented by the engagement of the cam projection 7 with the return rotation preventing locking portion 13. In other words, the locking claw 26a and the locking member 13 for preventing rotation are formed in an anti-back shape so that such a rotation preventing function is performed.

As described above, the mounting member 1 can be mounted at a predetermined position on the main body 3 to be mounted by one-touch operation by using the insertion locking device 2 and the locking means 4. When the mounting member 1 is to be removed from the body 3 to be mounted, the movable locking claw 16 of the locking means 1 is exposed to the surface (lower side) of the locking means 1 at a lateral side position of the mounting member 1. The operating portion 27 in the outer concave groove portion 24 is moved backward with the fingertip in a direction away from the mounting member 1 against the spring 17, and the locking claw portion 26 a at the tip of the movable locking claw 16 is moved.
Is detached from the return rotation preventing locking portion 13 on the protruding shaft portion 6 side, the insertion locking tool 2 (protruding shaft portion 6) on the mounting member 1 side is rotatable in a direction opposite to the screwing direction. Therefore, the projecting shaft portion 6 is integrally rotated with the mounting member 1 by 90 degrees in the direction opposite to the screwing direction, and the two arc-shaped cam projections 7 are inserted into the two cutout recesses 20 of the shaft hole portion 19. By returning to, the locking member 2 (projecting shaft portion 6) can be detached from the locking means 4 of the mounted main body 3 by being inserted integrally with the mounting member 1.

[0019]

The mounting device for a table leg or the like of the present invention can be implemented and used as described above. According to the mounting device of the present invention, the mounting device is mounted on the end of the mounting member. By simply inserting the protruding shaft portion of the insertion locking tool into the shaft hole of the locking means on the attached body side and rotating it forward by a predetermined angle, the cam projection on the protruding shaft portion and the retraction on the locking means side The mounting member can be pulled into and fixed to the body to be mounted with the cam surface, and this fixed state is determined by the relationship between the return rotation preventing locking portion on the protruding shaft portion side and the movable locking claw on the locking means side. In some cases, it can be automatically held.
When the mounting member is to be removed from the body to be mounted, the movable locking claw is unlocked by the operation portion thereof to disengage the movable locking claw from the return rotation preventing locking portion on the protruding shaft portion side. At the same time, after the attachment member (projection shaft) is rotated by a predetermined angle in the return rotation direction, the projection shaft may be pulled out from the shaft hole of the locking means.

That is, according to the mounting device of the present invention, as described above, the mounting member such as the table leg is inserted into the mounting body such as the table top plate and one-touch operation by only a slight rotation operation at a predetermined angle. It can be easily attached and detached with simple operation. Compared with the conventional screw shaft type, the attachment and detachment operation can be done very easily and quickly, and the coupling state by vibration etc. There is no risk of accidental loosening, and it can be used as a highly secure mounting device.

According to the second aspect of the present invention, the protruding shaft on the mounting member side can be stably formed by the retracting action of the two point-symmetrical cam projections and the two corresponding retraction cam surfaces. And it can be firmly pulled in and fixed. In addition, the rotation of the mounting member (projecting shaft) is about 90 degrees, and it is not necessary to insert one of the two cam projections at a predetermined position. Can be done.

According to the third aspect of the present invention, the movable locking claw is locked to the main body of the locking means by the locking piece for retaining, so that the movable locking claw is fixed to the body to be mounted before the locking means is mounted. The handling of the locking means is facilitated.

Further, according to the configuration of the fourth aspect, the insertion locking member can be easily and firmly attached simply by forming an attachment hole in the attachment member.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a state immediately before a mounting member is mounted on a body to be mounted.

FIG. 2 is a longitudinal sectional side view showing a state in which an attachment member is attached to an attached body.

FIG. 3A is a plan view of the insertion locking device, and FIG. 3B is a side view of the relevant part.

FIG. 4 is a partially longitudinal side view illustrating a method of attaching the insertion locking tool to the mounting member.

FIG. 5 is a bottom view of the main body of the locking means attached to the attached main body.

FIG. 6A is a plan view of a main body of the locking means,
FIG. B is a plan view of a movable locking claw incorporated in the main body.

FIG. 7A is a central longitudinal side view of a main body of the locking means, and FIG. B is a central vertical side view of a movable locking claw incorporated in the main body.

FIG. 8 is a sectional view taken along line AA of FIG. 6;

FIG. 9 is a sectional view taken along line BB of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Attachment member, such as a table leg, 2 Insertion and locking tool 3 Attachment main body, such as a table top plate 4 Locking means 6 Projection shaft part 7 Arc-shaped cam protrusion 7a Cam surface 8 Mounting cylinder shaft part 9 Mounting hole 10 Axial slit 11 Retaining ridge 12 Shaft hole 13 Return rotation preventing locking part 14 Fixing pin 15 Main body of locking means 16 Movable locking claw 17 Spring 19 Shaft hole part 20 Notch concave part 21 Lateral groove part 21a Retracting cam surface 21b Stopping surface 22 Inner groove 23 Communication hole 24 Outer groove 25 Locking piece for retaining 26 Locking claw main body 26a Locking claw 27 Operating section 28 Locking hole for locking

Claims (4)

[Claims] 1. An insertion locking device fixed to an end of a mounting member, and locking means mounted on a portion of the main body to be mounted on which the mounting member is mounted. A protrusion provided with a cam protrusion protruding from the peripheral surface and a locking portion for preventing return rotation, wherein the locking means includes a shaft hole into which the projection shaft of the insertion locking tool is fitted; When the protruding shaft portion fitted in the shaft hole is rotated forward by a predetermined angle, the cam surface for pulling in the protruding shaft portion via the cam protrusion, and the protruding shaft portion fitted in the shaft hole portion, A movable locking claw that engages with the return rotation preventing locking portion when rotated forward by an angle; and a spring that biases the movable locking claw in the engagement direction. A mounting device such as a table leg, which is provided with an operation unit for unlocking operation. 2. The cam projections are projected point-symmetrically on both sides in the diameter direction of the protruding shaft portion, and the return rotation preventing locking portions are formed point-symmetrically on the peripheral surfaces of both cam projections. In the hole,
A concave portion into which each of the cam protrusions is fitted is formed on both sides in the diametrical direction, and the cam surface is continuously provided only from the inner end of the concave portion in the forward rotation direction of the protruding shaft portion. The mounting device for a table leg or the like according to claim 1, wherein a stop surface that comes into contact with the cam projection when the cam protrusion is provided is connected to the cam surface, and the movable locking claw is provided on one of the cam surfaces. 3. A main body of the locking means having the shaft hole and the cam surface, an inner concave groove formed on the back surface side, and a retaining lock projected in the inner concave groove. A piece and an outer concave groove formed on the surface side so as to communicate with the outer end of the inner concave groove, wherein the movable locking claw loosely fits reciprocally in the inner concave groove. A locking claw main body, and an operating portion protruding into the outer concave groove portion, wherein the locking claw main body is provided with a locking hole for locking with which the locking piece for locking is engaged. The mounting device for a table leg or the like according to claim 1 or 2, wherein 4. The mounting device according to claim 1, wherein the insertion locking member has a tapered shaft hole whose inner diameter becomes smaller toward the distal end, and is configured to be able to be expanded by an axial slit, and is provided with a retaining ridge on an outer peripheral surface. Having a mounting cylinder shaft portion, in a state where the mounting cylinder shaft portion is inserted into a mounting hole drilled from an end surface of the mounting member,
By press-fitting a pin into the tapered shaft hole, the pin is used to expand the diameter of the mounting cylindrical shaft portion so that the retaining ridge bites into the inner peripheral surface of the mounting hole. The mounting device for a table leg or the like according to claim 1, wherein the mounting device is fixed.