JPH0689895B2 - Frame leg device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a leg device for a frame body, which is applied to kotatsu or the like whose legs are freely foldable.

(B) Conventional technology Conventionally, it is known that the legs fixed to the frame can be freely bent. For example, Japanese Utility Model Publication No. 50-44400 and Japanese Utility Model Publication No. 6
Nos. 0-95035 and JP-B-58-46357. In the structure disclosed in the above-mentioned publication, the leg is attached to the shaft of the metal fitting fixed to the frame body directly or via the metal fitting externally attached to the leg so that the leg can be bent.

However, if the legs are made directly on the metal fittings fixed to the frame via the shaft, if resin legs are used,
There is a problem that the strength of the portion of the leg that receives the shaft is reduced. Also, in the case of a configuration in which the metal fittings externally attached to the legs are provided in contact with the metal fittings fixed to the frame, the external metal fittings impair the appearance and
There is a problem that an unpleasant sound is generated due to the contact between the metal fittings.

(C) Problems to be Solved by the Invention In consideration of the above points, the present invention suppresses a decrease in strength of a bearing portion when a supporting leg made of a synthetic resin is used, and produces an unpleasant noise when the leg is rotated. The problem is to suppress the occurrence of backlash and rattling.

(D) Means for Solving the Problems The present invention comprises a plurality of legs that are respectively fixed to a plurality of leg mounting brackets provided on a frame, and each of the legs is bent below the frame. In a freely configured leg device, each leg has a synthetic resin support leg having a hollow interior,
A pair of outer walls that are vertically erected so as to face each other are continuously formed by a front wall, and the pair of outer walls are arranged so as to sandwich the upper end outer wall of the support leg, and the front wall is the leg. An upper hinge body made of metal fixed to a mounting member and a pair of outer walls vertically provided so as to face each other are connected by a front wall, the pair of outer walls being a pair of outer walls of the upper hinge body. Corresponding to the above, the metal lower hinge body is arranged and fixed at the upper end portion inside the support leg, the pair of outer walls of the upper hinge body and the lower hinge body, and the side wall of the support leg. A pair of outer walls of the upper hinge body and the lower hinge, the supporting leg being rotatably supported about the hinge pin with respect to the upper hinge body fixed to the leg mounting bracket. Between the pair of outer walls of the body, the side wall of the synthetic resin support leg is It is obtained by a configuration in which standing.

(E) Action As described above, in the present invention, the metal lower hinge body is arranged and fixed at the upper end of the hollow synthetic resin support leg, and the support leg is rotatable through the lower hinge body. Therefore, the strength of the support leg made of synthetic resin can be increased, and the lower hinge body is arranged in the support leg to improve the appearance.

Further, since the side wall of the synthetic resin support leg is interposed between the pair of outer side walls of the metal upper hinge body and the pair of outer side wall of the metal lower hinge body, when the support leg is rotated, Alternatively, when the user's foot hits the standing support leg, the side walls of the support leg act as cushioning materials to prevent rattling of the upper and lower hinge bodies, and to prevent unpleasant noise from contact between the upper and lower metal hinge bodies. To prevent the occurrence of.

(F) Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an external perspective view of the yagura kotatsu body (1). The rectangular frame that constitutes the upper part of the kotatsu body (1) is formed by crossing and combining a plurality of inner bars (2a) (2b) (2c) (2d).
The outside is surrounded by a plurality of outer rails (3a) (3b) (3c) (3d), and the end portions of the adjacent outer rails are connected to each other as shown in FIG. It is configured to be fixed by screws (5) and (5) via 4a, 4b, 4c and 4d. The leg mounting brackets (4a) ... Are also used for fixing a leg body (8) described later, and as shown in FIG. 3, a fixing bolt (59) for the leg body (8) is inserted in the front surface. A bolt insertion hole (6) is provided, and locking holes (7) and (7) are formed in the lower surface.

At the four corners of the frame body, leg bodies (8a) (8b) (8c) (8d) that can be freely folded as shown in FIGS. 1 and 2 (hereinafter, these are referred to as leg bodies (8)) Is fixed. The schematic structure of the leg (8) will be described below.

As shown in FIG. 2, the leg body (8) is formed by covering the upper end portion of a bendable hollow support leg (50) with an upper hinge cover (16). Then, the upper hinge cover (1
An upper hinge body (9) made of metal and having a substantially U-shaped cross section as shown in FIG. 3 is disposed in the inside of the supporting leg (50), and a crossing shown in the same figure is provided in the supporting leg (50). A metal lower hinge body (34) having a substantially U-shaped surface and a fixing base (38) fixed to the upper ends of the supporting legs (50) are arranged together with the lower hinge body (34).

Then, the support leg (50) has an upper end portion, in which the lower hinge body (34) is arranged and fixed, disposed between a pair of outer walls (9a) (9a) of the upper hinge body (9), and a hinge pin ( 32) is an outer side wall (9a) (9a) of the upper hinge body (9), upper side end side walls (50a) (50a) of the support leg (50), and an outer side wall (34a) of the lower hinge body (34) ( By arranging 34a) through, it is pivotally attached to the upper hinge body (9).

As a result, as shown in FIG. 8 and FIG. 11, the upper side both side walls (50a) (50a) of the support leg (50) are formed inside the outer side walls (9a) (9a) of the upper hinge body (9). The outside walls (34a) (34a) of the lower hinge body (34) are arranged inside thereof, and the fixing base (38) is further arranged inside thereof. That is, the outer walls (9a) of the upper and lower hinge bodies made of metal
(34a) is a resin-made supporting leg (50).
It is configured to sandwich. With this configuration,
The lower metal hinge body (34) is arranged in the support leg (50),
Since the portion exposed to the outside is reduced, the appearance can be improved.

Further, since the side wall (50a) of the synthetic resin support leg is interposed between the outer side wall (9a) of the metal upper hinge body (9) and the outer side wall (34a) of the metal lower hinge body (34), When the support leg (50) is rotated, or when the user's foot hits the support leg (50) in the upright state, the side wall (50a) of the support leg acts as a cushioning material, and the upper and lower hinge bodies ( It is possible to prevent rattling of (9) and (34), and to prevent unpleasant sound due to contact between the upper and lower metal hinge bodies (9) and (34).

Next, the detailed structure of the leg (8) will be described. The upper hinge body (9) is formed of a thick metal plate,
Outer wall (9a) vertically laid facing each other with a space (S) in between.
(9a), a front side wall (9
c) and has a substantially U-shaped cross section. Outer wall (9
Pin holes (14) and (14) for penetrating the hinge pin (32) are formed in the lower part of a) (9a). A bolt hole (12) into which a bolt (59) inserted through the bolt insertion hole (6) is screwed is formed at the center of the front side wall (9c), and a leg is formed. A plurality of locking claws (13) (1) that engage with the locking holes (7) (7) of the mounting bracket (4a).
3) is provided so as to project to the front side of the lower end, and the upper end is integrally provided with a bent upper surface wall (9d) extending toward the upper end side of the outer side walls (9a) (9a).

On the upper wall (9d), stopper claws (11) (11) provided with the inclined portions (10) (10) for locking the support legs (50).
Is integrally formed by bending downward on the center side. Further, guide pieces (15) (15) bent outward are provided at lower portions of the outer walls (9a) (9a).

The upper hinge cover (16) is capped on the upper ends of the support legs so as to cover the periphery of the upper hinge body (9), and has a storage space (upper part) having bearing grooves (17) (17). 18) and square holes (19) (19) are formed, and mounting step portions (20) (20) for mounting the crosspieces are formed on both sides, and engaging holes are provided near the mounting step portions. (21) forms (21).

A button (22) for unlocking the support leg (50) is arranged in the storage space (18). In this button (22), the shaft pin (23) (23) provided on one side of the button (22) is connected to the bearing groove (17) (17).
The other side provided with a plurality of pressing claws (24) (24) is constantly pushed upward by a spring (25). Square holes (19) (19) of the upper hinge cover (16)
A rubber seat (26) for slipping prevention of the top plate (T) is inserted through the above.

At the lower surface opening of the upper hinge cover (16), decorative covers (27) and (27) covering a part thereof are arranged. This cosmetic cover (27) (27) has a protrusion (28) on one of the opposite sides.
Structure in which elastic pieces (29) and (29) having (28) are provided, and engaging pieces (31) and (31) are provided adjacent to the elastic pieces and having hooking claws (30) and (30) formed at upper ends. I am trying.

(33) is an E-ring for preventing the hinge pin (32) from coming off.

The lower hinge body (3) disposed inside the support leg (50).
4) is a traverse formed by a thick metal plate, having outer walls (34a) (34a) vertically laid facing each other, and a front side wall (34c) connecting one of these vertical sides. It has a roughly U-shaped surface. The outer side walls (34a) (34a) are provided with pin holes (35) (35) on the front side thereof, and a screw insertion hole (36) is provided in the lower part.
Seat plates (37) and (37) are formed by drilling (36).

The fixed base (38), which is arranged inside the support leg (50) together with the lower hinge body (34), is provided with a guide space (39) on the front surface for arranging the lock actuator (44). , A pair of vertically long ribs (40) (40) and stopper rib (41) are formed on the inner wall of this guide space, and screw holes (42) (4
The fixed step portions (43) and (43) are formed by drilling 2).
The actuator (44) arranged in the guide space (39).
Is constantly pushed up by the spring (45). The operator rib (44) includes the stopper rib (41).
Stopper (4
6), retaining claws (48) each having an inclined portion (47) (47)
(48) and hook-shaped pressing pieces (49) (49) are formed.

The supporting leg (50) made of synthetic resin and having an inner cavity (K)
The lower hinge cover (54) that constitutes the upper part of this support leg
The leg portion (55) that constitutes the lower part of the support leg is integrally formed.

The lower hinge cover (54) has a plurality of long holes (5
1) (51) (51) (51) is provided and both side walls (50a) (50a)
The mounting step portions (53) (53) with the screw insertion holes (52) (52) are formed at the lower part of the. Lower hinge cover (54)
A leg cap (56) is fitted and fixed to the lower end of the leg portion (55) integrally provided in the lower part of the.

Next, the assembly sequence will be described.

First, the lower hinge body (34) is inserted from the lower part of the leg (55), and the pin holes (35) (35) are provided on both sides of the mounting steps (53) (53) of the lower hinge cover (54). Exposed through the notches (57) (57) and the seat plates (37) (37) overlap the undersides of the mounting steps (53) (53) of the lower hinge cover (54) to screw through holes (36).
Align (36) with the screw insertion holes (42) (42). In this state, the pin holes (14) (14) of the upper hinge body (9) and the pin holes (35) (35) of the lower hinge body (54) are aligned with each other and the hinge pin (32) is inserted therethrough to insert the E ring (33). ) To prevent it from coming off.

Then, the actuator (44) and the spring (45) are housed in the guide space (39) of the fixed base (38), and the stopper (46).
With the stopper rib (41) in contact, the fixing base (38) is inserted from the lower part of the leg (55), and the upper surface of the fixed step (43) (43) is inserted with the seat plate (37) (37) interposed. And lower hinge cover (54)
The lower surface of the mounting step (53) (53) is overlapped with the screw (58)
(58) screw through hole (52) (52) and screw through hole (36)
After screwing the screw holes (42) and (42) of the fixing base (38) through the (36) to integrate the leg portion (55), the lower hinge body (34) and the fixing base (38), the leg cap. Fit (56) the lower end of leg (55) and fix. At this time, the hooks (48) (4) of the actuator (44)
8) and the long holes (51) (51) (5) of the pressing pieces (49) (49), respectively.
1) Go to (51).

At this time, the outer side walls (34a) (34a) of the lower hinge body (34) and the side walls (50a) (50a) of the lower hinge cover (54) are vertically overlapped with each other to form the side walls of the lower hinge cover (54). (50a) (50
a) is located outside the outer walls (34a) (34a) of the lower hinge body (34).

Then, insert the rubber seat (26) into the square holes (19) and (19) of the upper hinge cover (16), and the front side is the spring (25).
The lock release button (22) is housed in the housing space (18) and the upper hinge body (9) is housed in the upper hinge cover (16) while being urged to be constantly pushed upward by.
At this time, the rubber seat (26) is sandwiched and fixed between the inner wall of the upper hinge cover (16) and the upper surface of the upper hinge body (9).

Then the elastic pieces (29) (29) of the makeup cover (27) (27)
Is fitted inside the guide pieces (15) (15), and the engaging pieces (31)
When the (31) is pushed along the outer wall surface of the upper hinge body (9), the hooking pieces (30) (30) engage with the engaging holes (21) (21) of the upper hinge cover (16) and the elastic pieces. (29) (29) protrusion (2
8) (28) is the mounting step (53) (5) of the lower hinge cover (54).
It is pressed against the outer wall located above 3).

In the support leg (50) assembled in this manner, the stopper claws (13) (13) of the upper hinge body (9) are attached to the leg mounting bracket (4).
It is locked in the locking holes (7) and (7) of a) and the bolt (59) is inserted into the insertion hole (6) of the leg mounting bracket (4a), and is inserted into the bolt hole (12) of the upper hinge body (9). It is pivotally attached to the kotatsu body (1) so as to be bendable by being screwed and fixed.

Thus, when the support leg (50) is to be erected, as shown in FIGS. 4 and 7, when the support leg (50) is pulled outward from the bent state to the erected state, the support leg (50) is rotated. The projections (28) and (28) are brought into sliding contact with both side walls (50a) and (50a) of the lower hinge cover (54) (see projections (28) and (2) in FIG. 7).
(Refer to the locus of the chain double-dashed line in 8)) The support leg (50) gradually rotates without rattling. When the support leg (50) is further rotated, the upper ends of the latching claws (48) (48) of the actuator (44) cause the upper hinge body (9) to have inclined portions (1) of the stopper pieces (11) (11).
(0) (10) slidingly contacts the actuator (4
4) descends against the spring (45).

When the support leg (50) is completely erected, the lower hinge body (3) located above the support leg (50) as shown in FIG.
The upper part of the assembly of 4), the fixed base (38) and the lower hinge cover (54) is housed in the space (S), and the outer wall (9a) of each of the upper hinge body (9) and the lower hinge body (34). ) (9a) (34a) (3
The side walls (50a) (50a) of the lower hinge cover (54) are interposed between the four (4a) and the hooks (48) of the actuator (14) are arranged.
(48) is a stopper piece (11) (11) of the upper hinge body (9)
It will be caught in the front side of the and locked.

Thus, when the support leg (50) is erected, most of the lower end of the upper hinge body (9) is (indirectly) connected to the lower hinge via a part of the decorative covers (27) and (27) as shown in FIG. Even if the support legs (50) are pulled in the direction of arrow A in FIG. 4 by hitting the mounting step portions (53) (53) of the cover (54), most of the load is placed on the lower hinge cover (54). It is transmitted from the stepped portions (53) (53) to the upper hinge body (9), and further transmitted to the leg mounting fittings (4a) by the stopper claws (13) (13) and dispersed.

Then, the support leg (5
(0) swings to the left and right, the lower hinge body (34) and the fixed base (3
The assembly of 8) and the lower hinge cover (54) swings left and right, but the outer walls (34a) (34a) of the lower hinge body (34)
Since the side walls (50a) (50a) of the lower hinge cover (54), which is a part of the support leg (50), are disposed between the upper hinge body (9a) and the upper hinge body (9a), the side walls are arranged in the left-right direction. To prevent rattling and metallic noise (because the lower hinge body and the upper hinge body do not hit each other).

Usually, the hinge mechanism pivotally supports two hinge bodies by hinge pins, but each hinge body has a gap between the outer walls of the respective hinge bodies so that the hinge bodies can be rotated smoothly after being connected by the hinge pins. At the same time, the pin holes through which the hinge pins of the respective hinge bodies are inserted also form gaps between them so that the hinge pins can be smoothly inserted. For this reason, when nothing is interposed between the outer walls of the respective hinge bodies, the left and right movements of the support legs cause the outer walls of the respective hinge bodies to come into contact with each other to generate an ear or a metallic sound. Although the hinge body moves to the left and right through the gap, causing backlash, which is inconvenient, but according to the present embodiment, this can be prevented.

Further, the load applied to the hinge pin (32) is transmitted to the upper hinge body (9) and is transmitted to the leg fittings by the stopper claws (13) (13) to be dispersed.

When the support leg (50) is pulled in the direction of arrow B in FIG. 4, almost all the load is pulled in the direction of arrow A, as in the case of pulling in the direction of arrow A. It is transmitted from 53) to the upper hinge body (9) and stopper claws (13) (13)
Dispersed in the leg mounting bracket (4a) via the actuator (44)
It is restrained by the engagement of the latching claws (48) (48) of the above and the stopper claws (11) (11) of the upper hinge body (9).

Then, when the top plate (T) is placed on the upper surface of the kotatsu body (1) as shown in FIG. 4 and a person rides on the top plate (T), the rubber seat (26) The weight is applied to the upper hinge body (9) through the lower hinge body (9), but is transmitted to the mounting step portions (53) (53) through the lower end of the upper hinge body (9) and is directly transmitted to the support leg (50). .

When the support leg (50) is in a bent state, pressing the lock release button (22) as shown by the arrow in FIG. 5 causes the pressing claws (24) (24) to press the pressing pieces (49) (49). ) To disengage the latching claws (48) (48) and the stopper claws (11) (11), and press the lower part of the support leg (50) in the direction of the arrow in FIG. 5 to bend it. In this way four support legs (50) (50) (50)
The state in which (50) is bent is shown in FIG.

FIG. 9 shows another embodiment of the upper hinge body (9), which has flat plate portions (60) (60) bent in the horizontal direction at the lower end, and the flat plate portion is provided as shown in FIG. The lower hinge cover (54) is mounted directly on the mounting step portions (53) (53). In this case, the lower surface of the decorative covers (61) (61) becomes smaller.

(G) Effect of the Invention As described above, according to the present invention, the metal lower hinge body is arranged and fixed to the upper end inside the synthetic resin support leg having a hollow interior, and the support leg is freely rotatable through the lower hinge body. Therefore, the strength of the synthetic resin support leg can be increased, and the lower hinge body can be disposed in the support leg to improve the appearance.

Further, since the side wall of the synthetic resin support leg is interposed between the pair of outer side walls of the metal upper hinge body and the pair of outer side wall of the metal lower hinge body, when the support leg is rotated, Alternatively, when the user's foot hits the upright support leg, the side walls of the support leg act as a cushioning material to prevent rattling of the upper and lower hinge bodies, and to prevent contact between the upper and lower metal hinge bodies. It is possible to prevent an unpleasant sound from being generated.

[Brief description of drawings]

FIG. 1 is a perspective view of a kotatsu body provided with a leg device of the present invention, FIG. 2 is a perspective view when the legs are folded, FIG. 3 is an exploded perspective view of the essential parts of FIG. 1, and FIG. FIG. 5 is an enlarged cross-sectional view of the main part when the top plate is placed, FIG. 5 is an enlarged cross-sectional view of the main part before the legs are folded, FIG. 6 is an enlarged cross-sectional view of the main part of the leg, and FIG. FIG. 8 is an explanatory view of an operation when folding, FIG. 8 is an enlarged cross-sectional view of a main part of a leg body, and FIG. 9 is a perspective view showing another embodiment of the upper hinge body.
FIG. 10 is an enlarged sectional view of a main part of a leg body showing another embodiment, and FIG. 11 is a sectional view taken along the line IV-IV in FIG. (1) ... Kotatsu body, (2a) (2b) (2c) (2d) ... inner rail, (3a) (3b) (3c) (3d) ... outer rail, (4a) (4b)
(4c) (4d) ... leg mounting bracket, (8a) (8b) (8c) (8d)
... legs, (9) ... upper hinges, (32) ... hinge pins,
(34)… Lower hinge body, (50)… Support legs.

Claims (1)

[Claims] 1. A leg device comprising a plurality of legs each fixed to a plurality of leg mounting fittings provided on a frame, each leg being configured to be bendable downward of the frame. , Each of the legs is a synthetic resin support leg having a hollow inside,
A pair of outer walls that are vertically erected so as to face each other are continuously formed by a front wall, and the pair of outer walls are arranged so as to sandwich the upper end outer wall of the support leg, and the front wall is the leg. An upper hinge body made of metal fixed to a mounting member and a pair of outer walls vertically provided so as to face each other are connected by a front wall, the pair of outer walls being a pair of outer walls of the upper hinge body. A metal lower hinge body arranged and fixed at an upper end portion inside the support leg corresponding to the above, and a hinge pin arranged to penetrate through the pair of outer walls of the upper hinge body and the lower hinge body and a side wall of the support leg. And supporting the support leg rotatably around the hinge pin with respect to the upper hinge body fixed to the leg mounting bracket, and further comprising a pair of outer walls of the upper hinge body and the lower hinge body. The side wall of the synthetic resin support leg is interposed between the pair of outer walls. Leg apparatus frame, characterized in that a configuration in which.