JP3052049U - Corner connector for picture frame - Google Patents

Abstract

(57) [Problem] To provide a corner connecting tool for connecting a frame of an aluminum picture frame to be able to connect even a frame having a different size and to obtain a desired connection state even when used repeatedly. To be able to An L-shaped connecting plate (7) is inserted under the opposing pieces (11), which face each other across an opening (10) on the back side of the forehead (2, 3, 4, 5). An insertion hole 15 for pivotally mounting the operation lever 8 is formed in 7a. In the insertion hole 15, a partial female screw portion 15a having a female screw and an indentation portion 15b having no female screw are formed by being divided in the circumferential direction. The shaft 8a is inserted. At the lower end of the rotating shaft 8a, a biasing member 9 for biasing the rotating shaft 8a in a direction of pulling the rotating shaft 8a downward under the insertion piece 7a is attached to prevent the rotation shaft 8a from coming off. On the surface,
5b, the insertion is permitted, and a partial male screw portion 20 that is screwed to the partial female screw portion 15a by 90 degrees rotation from the permissible state is formed.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a corner connecting device for a frame that enables the connection between the aluminum frames forming the frame to be made firmly and in a one-touch manner.

[0002]

[Prior art]

 Various methods are used to connect the foreheads, but in the case of aluminum, fixation using screws or press-fitting is adopted. However, fixing with screws is cumbersome, so at least the forehead, which forms one side of the frame, which is attached and detached for putting in and out of exhibits, is fixed by pressure welding. . This fixation is performed by vertically sandwiching the opposing pieces that face each other across the opening on the back of the forehead, or by expanding the lower groove of these opposing pieces vertically. Rotate the lever as much as possible to get over the protrusion (see, for example, Japanese Utility Model Publication No. 2-35353 and Japanese Utility Model Publication No. 2-27825), or tilt the lever to actuate the cam (see Japanese Utility Model Application Publication No. (See -26800) and fix it all at once with a one-touch method.

[0003] However, such fixation cannot be performed by connecting forehead bones of a predetermined size assumed in advance. That is, since a lever is rotated or tilted to apply pressure to a specific portion, a slight dimensional error is not allowed. For this reason, although rare, even in the case of the connection of the forehead of a predetermined size that was assumed in advance, there were cases where the desired connection could not be made due to rattling or excessive tightness. For this reason, there was no sensation about connecting forehead bones of different dimensions.

In addition, in the case of the above-mentioned fixation, since a specific portion of the forehead is strongly contacted, the portion may be worn or clogged by repeated attachment / detachment, and gradually lose a desired connection force. Was.

[0005]

[Problems to be solved and means for solving them]

 Therefore, the main object of the present invention is to provide a method of enabling connection of framed bones having different dimensions, and to provide a corner connecting device having a frame that can obtain a desired connection state even when used repeatedly. .

Means for that purpose is a corner connector of a frame for connecting the ends of the forehead having an opening of a predetermined width on the back surface, and is provided on a lower side of an opposing piece facing the opening with the opening therebetween. A connecting plate having an insertion piece is provided, and at least one insertion piece of the connection plate is formed with an insertion hole for pivotally mounting an operation lever, and a partial female screw having an internal thread in the insertion hole. Part and a sunk part having no female thread are formed in the circumferential direction, and a rotating shaft to be inserted through the insertion hole is vertically provided from a lower surface of one end of the operation lever. Is mounted with an urging member for pulling the rotating shaft, which is inserted through the insertion hole of the connecting plate, downward on the lower surface side of the connecting plate, and the outer peripheral surface of the rotating shaft corresponds to the sunk portion. Insertion is permitted when it is made to rotate, And a corner connector having a frame formed with a partial male screw portion screwed to the partial female screw portion.

[0007] The slack portions of the insertion holes are formed on both sides in the length direction of the insertion piece, and partial female threads are formed on both sides in the width direction of the insertion piece. When the surface shape is formed by cutting the circumferential portions on both front and rear sides of the circular shape and the partial male screw portions are formed on the circumferential portions on both right and left sides, and the operation lever is rotated to follow the insertion piece. Preferably, the partial male screw portion is set so as to screw with the partial female screw portion.

[0010] Furthermore, a regulating protrusion which contacts the upper surface of the opposing piece to increase the contact resistance may be formed in the lower surface of the operating lever near the portion where the rotating shaft is vertically suspended.

Further, it is preferable that the biasing member is formed of a leaf spring, and that the surface of the leaf spring in the insertion / removal direction of the insertion piece has an inclined surface having an inverted C shape.

[0010]

[Action and effect]

 That is, according to the above configuration, when connecting the forehead, first, the insertion piece of the connecting plate having the operation lever is inserted into the forehead. This insertion is performed so that the connecting plate is located below the opposing piece of the forehead and the operating lever is located above the opposing piece. That is, the operation may be performed in a state where the rotating shaft of the operation lever is pushed up against the urging force of the urging member. Then, the operating lever and the insertion piece sandwich the opposing piece of the forehead up and down by the urging force of the urging member, and a tentative connection state is obtained. Then, the operation lever is rotated in the screwing direction (right direction), and the partial male screw portion of the operation lever is screwed into the partial female screw portion formed in the insertion hole of the insertion piece. By this screwing, the operation lever is further moved to the connecting plate side, and sandwiches the opposing piece with a force greater than the urging force of the urging means. In other words, it can be positively compressed and a strong fixed state can be obtained.

[0011] As described above, since the fixing is performed in two stages, which has not been achieved in the past, the above-mentioned extremely fixed state can be obtained, and the rotation of the operation lever is performed by partially rotating the male screw. Since it is performed according to the part and the internal female thread part, it can be operated with a constant force unlike the case where the contact resistance is simply provided by moving over the protrusion or by acting a cam. That is, an extremely large force is not required and the operation is easy. Further, since the partial male screw portion and the partial female screw portion are engaged with each other, the contact area is large and the loosening can be suppressed.

Further, since the partial male screw portion and the partial female screw portion which hold the opposing piece vertically sandwiched for fixing are mutually screwed with a plurality of threads, the thickness of the opposing piece to be held is reduced. Can respond. In other words, even if the opposing pieces have different thicknesses, the connection having desired fixing strength can be achieved by changing the screw positions of the partial male screw portion and the partial female screw portion. In addition, even when the upper surface of the opposing piece is worn due to repeated use, it is possible to cope with a change in the thickness of the opposing piece by changing the screw position of the partial male screw portion and the partial female screw portion. For this reason, high-strength connection is possible as described above.

Further, the number of components is reduced to a minimum of three and inexpensive manufacturing is possible.

According to the second aspect of the present invention, the fixing is completed when the operation lever is rotated along the connecting plate, so that the operation lever becomes an obstacle when holding or hanging the frame. And it is possible to maintain the fixed state because it is prevented from receiving unexpected external force.

In the case where the regulating projection is formed on the lower surface of the operation lever as described in claim 3, accidental rotation of the operation lever can be suppressed by the contact resistance.

When the biasing member is formed of a leaf spring and the inclined surfaces are formed on both sides in the insertion / removal direction, the insertion operation can be easily performed.

[0017]

【Example】

 One embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view of a corner connector 1 of a picture frame. The corner connector 1 is used as shown in FIG. That is, when connecting the four foreheads 2, 3, 4, and 5 to form a rectangular frame 6, it is used by being fixed to both ends of one of the foreheads 2. Are detachably connected.

The configuration is such that an L-shaped connecting plate 7 corresponding to a right-angled corner portion, an operating lever 8 rotatably mounted on one of the insertion pieces 7 a of the connecting plate 7, and a rotating shaft of the operating lever 8. An urging member 9 is attached to the lower end of the rotating shaft 8a for maintaining the mounted state of the operation lever 8 and for urging the rotating shaft 8a downward.

The above-mentioned connecting plate 7 is inserted into the lower sides of the opposing pieces 11, 11 of the forehead bones 2, 3, 4, 5 having an opening 10 of a predetermined width on the back surface with the opening 10 being interposed therebetween. Insertion pieces 7a and 7b to be inserted into and removed from the groove 12 are provided on both sides, and one of the insert pieces 7a holds the operation lever 8 as described above.

The other insertion piece 7 b is formed with two screw holes 13, 13 formed by screwing female threads, and fixing screws 14 are screwed into these screw holes 13, 13. That is, after inserting the insertion piece 7b into the insertion groove 12, when the screw 14 is screwed into the screw holes 13, 13, the insertion piece 7b is drawn upward and pressed against the lower surfaces of the opposing pieces 11, 11, and The lower surface of the head of the screw 14 is pressed against the upper surface of the opposing pieces 11, 11 (see FIG. 4).

As shown in FIG. 3, the one insertion piece 7 a has one insertion hole 15 and two locking holes 16, 16 which sandwich the insertion hole 15 in the length direction of the insertion piece 7 a. Has formed. The insertion hole 15 is formed by dividing a female thread part 15a, 15a having a female thread and a thread part 15b, 15b without a female thread in the circumferential direction. The thread part 15b, 15b is inserted. It is formed on both sides in the length direction of the piece 7a, and partial female screw portions 15a, 15a are formed on both sides in the width direction of the insertion piece 7a.

The locking holes 16 fix the both ends of the urging member 9 at positions equidistant from the insertion hole 15, respectively.

The above-mentioned operation lever 8 is formed in a substantially strip shape, and the rotating shaft 8a is vertically suspended from the lower surface of one end. The rotation shaft 8a is inserted through the insertion hole 15, and the cross-sectional shape of the main body 17 is a shape that can be inserted, that is, an oval shape obtained by cutting the circumferential portions on both front and rear sides of the cylindrical body. Is formed. At the lower end, a disc-shaped small diameter portion 18 and a large diameter portion 19 are sequentially formed. Insertion into the circumferential portions on both the left and right sides of the main body 17 is allowed when corresponding to the slack portions 15b, 15b of the insertion hole 15, and by rotating 90 degrees from the allowable state, the partial female screw portions 15a, 15b are rotated. Partial male screw portions 20 and 20 that are screwed to 15a are formed. The partial male screw portions 20, 20 are screwed so that the partial male screw portions 20, 20 are screwed into the partial female screw portions 15a, 15a when the operation lever 8 is rotated by 90 degrees and along the insertion piece 7a. The operation lever 8 is set to be located on both sides in the width direction.

At the base of the rotating shaft 8 a on the lower surface of the operation lever 8, regulating protrusions 21, 21 are formed which contact the upper surfaces of the opposing pieces 11, 11 of the forehead bones 3, 5 to increase the contact resistance. doing. As shown, it may be formed on both sides of the rotating shaft 8a on the lower surface of the operation lever 8. The cross-sectional shape may be triangular or semicircular.

The urging member 9 is formed of a leaf spring, and has a shape in which both sides of the horizontal portion 22 are raised at a predetermined angle, for example, an angle of 45 degrees. At the center of the horizontal portion 22, an engaging hole 22a having a size that allows the large-diameter portion 19 of the operation lever 8 to be inserted is formed, and an inner peripheral surface of the engaging hole 22a is formed obliquely downward. The locking claws 22b are formed so as to incline toward them. That is, when the urging member 9 is fitted into the lower end of the rotating shaft 8a of the operation lever 8 inserted through the insertion hole 15 of the connecting plate 7 from below, the horizontal portion 22 of the urging member 9 becomes small in diameter. After being fitted to the position of the portion 18, the locking claws 22b are locked to the upper end surface of the large-diameter portion 19 to prevent removal. At the upper ends of the inclined portions 23, 23 rising from both sides of the horizontal portion 22, an engaging piece 23a is vertically raised. The engaging pieces 23a, 23a are engaged with the engaging holes 16, 16 of the connecting plate 7 from below when the above-described retaining is performed (see FIG. 4).

Although FIGS. 1 and 3 show the corner connector 1 attached to one end (the left side in FIG. 1) of the forehead 2 to be detachably connected, the corner connector 1 attached to the other end is upper. It can be manufactured only by changing the same members as the members 7, 8, 9 described above. That is, it is only necessary to use the connecting plate 7 upside down. Therefore, there is an advantage that the manufacturing cost can be reduced.

In order to connect the forehead 2 using the corner connecting tool 1 configured as described above, first, the insertion piece 7 b of the connecting plate 7 on the side having no operation lever 8 is fixed to both ends of the forehead 2. Keep it. Then, the other insertion piece 7a is inserted into the insertion groove 12 of the forehead bones 3 and 5 to be connected. This insertion is performed such that the connecting plate 7 is located below the opposing pieces 11, 11 of the forehead bones 3, 5, and the operation lever 8 is located above the opposing pieces 11, 11. In other words, the operation may be performed in a state where the rotating shaft 8a of the operation lever 8 is pushed up against the urging force of the urging member 9. Since the inclined portions 23, 23 are formed on both surfaces of the urging member 9 in the insertion / removal direction, the insertion operation is easy. Then, by the urging force of the urging member 9, the operation lever 8 and the insertion piece 7 vertically sandwich the opposing pieces 11, 11 of the foreheads 3, 5, and a tentatively connected state is obtained (see FIG. 5). . Then, the operation lever 8 is rotated 90 degrees in the screwing direction (rightward), and the partial male screw portions 20, 20 of the operation lever 8 are partially female screw portions 15a, 15a formed in the insertion holes 15 of the insertion piece 7a. To screw. By this screwing, the operation lever 8 advances to move to the connecting plate 7 side, and sandwiches the opposing pieces 11, 11 with a force greater than the urging force of the urging means 9 (see FIG. 6). In other words, it can be positively compressed and a strong fixed state can be obtained.

As described above, the fixing is performed in two stages, which has not been achieved in the past, so that the above-mentioned extremely fixed state can be obtained. Since the operation is performed in accordance with the portions 20, 20, and the partial female screw portions 15a, 15a, the operation can be performed with a constant force unlike the case where the contact resistance is imparted by simply moving over the protrusion or acting on the cam. In other words, extremely large force is not required and operation is easy. Further, since the partial male screw portions 20, 20 and the partial female screw portions 15a, 15a are engaged with each other, the contact area is large, and loosening can be suppressed. In addition, since the partial male screw portions 20, 20 and the partial female screw portions 15a, 15a are formed in two well-balanced portions, a stable tightening state can be obtained.

Further, the partial male screw portions 20, 20 and the partial female screw portions 15a, 15a, which hold the opposing pieces 11, 11 up and down for fixing, are screwed to each other with a plurality of threads. And the thickness of the opposing pieces 11, 11 to be sandwiched. In other words, even if the opposing pieces 11, 11 have different thicknesses, connection with desired fixing strength is possible. In addition, even when the upper surfaces of the opposing pieces 11, 11 are worn due to repeated use, the screwing positions of the partial male screw portions 20, 20 and the partial female screw portions 15a, 15a are changed, so that the opposing pieces 11, 11 are changed. Can respond to changes in thickness. For this reason, high-strength connection is possible as described above.

Furthermore, only three parts are required, and low-cost manufacturing is possible.

Further, since the fixing is completed when the operation lever 8 is moved along the insertion piece 7a of the connecting plate 8, the operation lever 8 is not in the way when holding or hanging the frame 6. In addition, it is possible to avoid being subject to unexpected external force, and it is possible to maintain the fixed state firmly. This effect is further enhanced by forming the regulating protrusions 21 on the lower surface of the operation lever 8, thereby increasing the contact resistance.

[Brief description of the drawings]

FIG. 1 is a perspective view of a corner connector.

FIG. 2 is a rear view of a picture frame showing a use state of the corner connector.

FIG. 3 is an exploded perspective view of a main part.

FIG. 4 is a partially cutaway sectional view taken along line AA of FIG. 2;

FIG. 5 is a sectional view in an operating state.

FIG. 6 is a sectional view in an operating state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Corner connection tool 2, 3, 4, 5 ... Frame 6 ... Frame 7 ... Connection plate 7a, 7b ... Insertion piece 8a ... Rotating shaft 9 ... Urging member 10 ... Opening 11 ... Opposing piece 15 ... Insertion hole 15a: Partially female screw part 15b: Partially threaded part 20: Partially male screw part 21: Restriction projection

Claims (4)

[Utility model registration claims] 1. A frame corner connector for connecting the ends of a forehead having an opening of a predetermined width on a back surface thereof, wherein the insertion piece is inserted below a facing piece opposing the opening with the opening interposed therebetween. A connecting plate having a female screw is formed in at least one of the insertion pieces of the connecting plate. A slack portion which is not formed is formed by being divided in the circumferential direction, and a rotating shaft to be inserted into the insertion hole is vertically provided from a lower surface of one end of the operation lever, and the rotating shaft is provided with the connecting plate of the connecting plate. An urging member for pulling the rotating shaft in a state of being inserted through the insertion hole downward on the lower surface side of the connection plate is attached, and the outer peripheral surface of the rotating shaft is allowed to be inserted when the rotating shaft corresponds to the slack portion. Then, by rotating at a predetermined angle from the allowable state, Frame corner connector which form part externally threaded portion to be screwed Te. 2. A slack portion of the insertion hole is formed on both sides in a length direction of the insertion piece, and a partial female screw portion is formed.
Formed on both sides of the insertion piece in the width direction, the cross-sectional shape of the rotating shaft is formed by cutting the circumferential parts on both front and rear sides of the circle, and the partial male screw part is formed on the circumferential parts on both right and left sides 2. The corner connector according to claim 1, wherein said partial male screw portion is screwed into said partial female screw portion when said operating lever is rotated along said insertion piece. 3. The corner of a picture frame according to claim 1, wherein a restricting projection is formed in the lower surface of said operating lever near a portion where the rotating shaft is vertically suspended to increase contact resistance by contacting the upper surface of said opposing piece. A coupling tool. 4. The device according to claim 1, wherein the biasing member is formed of a leaf spring, and a surface of the leaf spring in a direction in which the insertion piece is inserted and removed is provided.
The corner connector for a picture frame according to any one of claims 1 to 3, wherein the inclined surface has an inverted C shape.