JP2000008694A - Hinge for folding door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a hinge which can be easily assembled or disassembled by providing blades composed of two plates, a cam, a cam receiver, an elastic member, and a cam guide and making detachable a fitting part of the cam guide to one of plates. SOLUTION: A first blade 10 and a second blade 20 constituting the hinge are rotatably connected to each other through a cam receiver 30 and a rivet 70, and attached to a door or an article of furniture or the like to be able to be folded completely or at a specified angle. A cam 40 urged by a spring 50 is detachably fitted to a recess 22 of the second blade 20 through a cam guide 60 to press the cam receiver 30 by the cam 40. The cam guide 60 is attached after connection of the blades 10, 20 so as not to be influenced by the urging force of the spring 50 when connecting the blade, and also it is contrived so that the hinge is not required to disassemble when the spring 50 is replaced, and further, the assembling can be easily corrected even in case of an assembling miss or the like. In this way, assembling, disassembling, and replacement can be easily carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding door used for connecting folding doors having two or more doors connected in a foldable manner, such as a partition for a building interior work or a folding door for furniture. Regarding door hinges, in particular, a cam guide holding a cam that regulates the rotation of two rotatably connected blades and opens a door at a desired angle is detachably attached to the blade side. The present invention relates to a hinge for a folding door, which is configured to be attached so that assembling and disassembling operations of the hinge are facilitated, and an elastic member such as a spring for biasing a cam can be freely attached and detached and replaced.

In addition, the present invention facilitates positioning of a hinge to a digging hole side only by a simple and inexpensive structure when a blade constituting a hinge is engaged with a digging hole on a door body and mounted. The present invention relates to a hinge for a folding door that can be performed, reliably prevent the hinge from being displaced, and can cover and hide a dug hole of a door body without exposing it around the hinge.

[0003]

2. Description of the Related Art In general, two or more doors are foldably connected to each other, such as a folding door used as a partition for building interior work or a folding door provided on the front of furniture. In such a folding door, a hinge for a folding door is used which is capable of connecting a plurality of door bodies and holding each door body in an opened state at a desired angle. Here, such a conventional hinge for a folding door will be described with reference to FIGS. 11 and 12. FIG.

FIG. 11 is an exploded perspective view showing a conventional hinge for a folding door in a state before assembly. FIGS. 12A and 12B are perspective views showing a conventional hinge for a folding door, wherein FIG. 12A shows a state in the middle of assembly, and FIG. 12B shows a state after the assembly is completed. As shown in these figures, a conventional hinge for a folding door that forms a folding door by connecting a door body in a freely foldable manner includes a first blade 110 and a second blade 120 that are foldably connected, and a first blade. 1
10 and the second blade 1
There is a cam 140 attached to the 20 side. Then, the cam 140 is held by a cam guide 160 provided integrally with the second blade 120 side, and abuts against the cam receiver 130 on the first blade 110 side in a press-contact state, so that the two blades 110 and 120 The opening angle is regulated, and the door body to which these two blades 110 and 120 are attached is opened or folded at a desired angle.

The first and second blades 110 and 120 are respectively composed of plate-shaped plate portions 111 and 121. As shown in FIGS. 11 and 12, the plate portion 111 of the first blade 110 has
Tubular curl portions 113, 1 through which rivets 170 can be inserted
13 is provided, and a plate portion 121 of the second blade 120 is provided with a pair of insertion portions 123, 1 located inside the curl portion 113.
23, the curl portion 113 of the first blade 110,
The cam receiver 130 can be disposed at the center of the 113 in the longitudinal direction. And these curl portions 11
By inserting the rivet 170 through the third and insertion portions 123, the first blade 110 and the second blade 120 are foldably connected.

[0008] As shown in FIGS. 11 and 12, the insertion portion 12 of the second blade 120 into which the rivet 170 is inserted.
3 and 123, each side has a plurality of washers 17 respectively.
3 intervenes to reduce the frictional resistance between the two blades 110 and 120 when the hinge is folded.
Prevents the generation of sound. The plate portions 111 and 121 of the first and second blades 110 and 120 are fixed portions fixed to the surface of the door body by screws or the like. A plurality of screw holes 111a and 121a through which the above screws pass are formed at arbitrary positions.

The first and second blades 110, 1
20, a cam receiver 130 is attached to the first blade 110 side, and a cam 140 is attached to a cam guide 160 formed integrally with the second blade 120. First, the first blade 110 includes the curl portion 11
3 is pierced by the rivet 170,
A cam receiver 130 is attached. This cam receiver 130 is, as shown in FIGS.
On the bottom side, the curled portions 113 and 11 of the first blade 110
3, the second blade 120 is engaged and fixed.
The contact portion of the tip of the side cam 40 abuts stepwise to constitute a cam means for regulating the opening angle of the first and second blades 110 and 120.

On the other hand, a cam guide 160 is integrally provided on the second blade 120 side.
At 0, the cam 140 that comes into contact with the cam receiver 130 on the first blade 110 side is movably held. The cam 140 is slidably abutted along the outer periphery of the cam receiver 130 where a plurality of steps are formed, and the leading end that contacts the cam receiver 130 is an abutting part. Guide grooves extending in the contact direction with the cam receiver 130 are formed on both side surfaces of the cam 140 so that the guide projections 162 and 162 on the cam guide 160 side engage.

Further, as shown in FIG. 11, the cam 140 has a spring receiving hole formed at the rear end side so that the spring 150 can be stored therein. Spring 1
Reference numeral 50 denotes an elastic member which constantly urges the cam 140 in the contact direction of the cam receiver 130, and is provided in the cam 140, and is engaged with the spring engagement projection 161 on the cam guide 160 side. Is always biased toward the cam receiver 130 side.

[0010] The cam guide 160 is a frame body in which an end of the second blade 120 on the side of the cam receiver 130 is opened between the insertion portions 123 and 123, and a center portion is cut out to be hollow. And is formed integrally with the second blade 120. At the back end of the notch of this cam guide 160,
A spring locking projection 161 for locking the spring 150 is provided, and the inner surface of the cam guide 160 facing the notch extends toward the cam receiver 130 and moves to the guide groove on the side surface of the cam 140. Guide protrusions 162, 1 that freely engage
62.

By engaging a cam 140 containing a spring 150 with a cam guide 160 provided on the second blade 120, the cam 140 is movably guided along the front and rear directions in which the spring 150 is urged. It is becoming like. Further, by connecting the first blade 110 and the second blade 120 with the rivet 170 with the cam 140 attached to the cam guide 160, the cam 140 is brought into contact with the outer periphery of the cam receiver 130 by the urging force of the spring 150. The two blades 110, which are rotatably connected by the contact between the cam 140 and the cam receiver 130,
The rotation of the shaft 120 is regulated. As a result, the door body to which each of the blades 110 and 120 is attached can be opened or folded at a desired angle, thereby forming a folding door that can be freely opened and closed.

[0012] Examples of such conventional hinges for folding doors include, for example, "Hinges" of JP-A-7-233669, "Hinges" of JP-A-8-270308, and JP-B-6-3089. "Hinges for closet doors", "Hinges" of Japanese Utility Model Application Laid-Open No. 6-56427, 4-35506
Japanese Patent Publication No. 5-184475 proposes a "hinge" of Japanese Utility Model Publication No. 5-18475, and a "door apparatus" of Japanese Utility Model Publication No. 5-18474.

[0013]

However, such conventional hinges for folding doors, including those disclosed in the above-mentioned publications, all have a cam guide means for attaching a cam to one blade side. It is provided integrally on one blade side. This makes it extremely difficult to assemble the entire hinge, and it is also extremely difficult to disassemble the hinge once assembled. In particular, there is a problem that the spring for biasing the cam cannot be attached or detached or replaced.

That is, as shown in FIGS. 11 and 12, a conventional hinge for a folding door in which a cam guide and a blade are integrated with each other is constructed by first mounting a cam receiver 1 on one first blade 110 side.
30 and a spring 15 on the other second blade 120 side.
0 is stored in the state where it is attached to the cam guide 160, and the cam 140 is brought into contact with the cam receiver 130 side, and the spring 150 is compressed while resisting the elastic force of the spring 150. Then, the second blade 120 is moved to the first blade 110 side, and the first and second blades 110 and 120 are kept in a state where the spring 150 is kept compressed.
The rivet 170 is aligned with the curl portion 113 and the insertion portion 123 while the rivet 170 is kept as it is.
And work to insert it into the insertion portion 123, and thereafter,
The procedure is such that the end of the rivet 170 is caulked and fixed.

For this reason, in the conventional hinge for a folding door, the assembling operation of the hinge is always performed in a state where it is resisted against the elastic force of the spring 150. In particular, the spring 150 of the hinge for the folding door is used. In general, it has a very high resilience,
Assembly work has been extremely difficult. Moreover,
The hinge completed through such a difficult assembling operation has the two blades 110 and 120 and the cam 140 which are firmly integrated by the urging force of the spring 150, and the rivet 170.
After caulking and fixing, it is no longer possible to disassemble, and it is not possible to respond to the need to disassemble the hinge after assembly, such as an assembly error or a change in the biasing force of the spring. There was no other way to replace springs than to make a new hinge.

In Japanese Utility Model Registration No. 2550991, for the purpose of easily assembling such a hinge for a folding door, two hinges are connected by rivets, and then the hinges are attached to the back side of one hinge. A "hinge" has been proposed which has an opening which allows a ball and a spring to be inserted in a compressed state in a provided storage portion. However, in the hinge described in this publication, an opening for inserting the spring is provided with a length that is slightly shorter than the spring, so that the opening exists as a large escape space against the urging force of the spring. However, there has been a problem that the biasing force of the spring is not uniformly transmitted to the ball and cam receiving side.

Therefore, in the hinge described in this publication, the urging force of the spring is dispersed to the opening side, so that the opening and closing of the door body via the hinge cannot be performed smoothly, and in particular, the urging force,
When the present invention is applied to a hinge for a folding door that requires a spring having a high elasticity, the spring may fall off from the opening of the storage section.
Furthermore, in this hinge, there is no particular reference to the replacement of the spring after the assembly is completed.If the spring is to be removed after the assembly in the hinge described in this publication, a method other than pulling out the spring from the opening of the storage section is a method. However, in the method of taking out the spring by pulling out from such an opening, the spring is damaged at the time of drawing out, and the drawn out spring cannot be reused, so it is necessary to actually replace the spring. Was extremely difficult.

The present invention has been proposed in order to solve the problems of the prior art, and restricts the rotation of two pivotally connected blades in a hinge for a folding door. A cam guide holding a cam for opening the door body at a desired angle is detachably attached to the blade side, thereby facilitating assembly and disassembly of the hinge and biasing the cam. It is an object of the present invention to provide a hinge for a folding door that allows a flexible member such as a spring to be freely attached and detached and replaced.

Further, according to the present invention, even when the blade constituting the hinge is engaged with the digging hole on the door body and attached, the positioning of the hinge on the digging hole side is facilitated only by a simple and inexpensive structure. It is an object of the present invention to provide a hinge for a folding door, which can prevent the hinge from being displaced in a reliable manner, and can cover and hide a dug hole of a door body without exposing it around the hinge.

[0020]

In order to achieve the above object, a hinge for a folding door which comprises a folding door by connecting two or more doors according to claim 1 of the present invention in a foldable manner is provided. A blade, which is attached to each door body constituting the door and is composed of two foldably connected plate portions, a cam receiver disposed on one plate side of the blade, and an outer periphery of the cam receiver. A cam that slidably abuts along, an elastic member that constantly urges the cam in the contact direction of the cam receiver, and a guide that movably guides the cam along the urging direction of the elastic member, A cam guide attached to the other plate portion side of the blade in a state where the cam is in contact with the outer periphery of the cam receiver, and the cam guide and the attachment portion on the other plate portion side,
It is configured to be removable.

Specifically, in the second aspect, the cam guide includes a claw portion projecting in a hook shape toward the other plate portion of the blade at a tip end side of the cam in the cam receiving contact direction. The other plate portion is provided with a locking hole in which the claw portion of the cam guide is detachably locked. Further, in the third aspect, the cam guide includes an engagement protrusion that engages with the other plate portion side of the blade at a rear end side of the cam in the cam receiving contact direction, and the other plate portion. Further, there is provided a structure having an engaging portion with which the engaging protrusion is detachably engaged.

According to the hinge for a folding door of the present invention having such a configuration, the mounting portion of the cam guide and the plate portion forming the blade is made detachable, so that when connecting the two blades, It is not necessary to mount the cam, the cam guide and the elastic member. Thus, the two blades can be connected without any influence of the biasing force of the elastic member such as the spring, and the blade assembling operation can be performed extremely easily and quickly.

According to the present invention, the cam,
Before attaching the cam guide and the elastic member, the hinge can be managed and stored in a state where the two blades are connected, and the cam and the elastic member can be easily removed simply by removing the cam guide from the blade side. Can be removed from the hinge side, so even if it is necessary to change the biasing force of the elastic member, only the elastic member can be easily removed without disassembling the entire hinge and without damaging the elastic member or each part. The hinge can be replaced, and the design of the hinge can be changed very easily. Furthermore, before the rivet connecting the two blades is swaged, there may be mistakes in the assembling work, for example, when the washer was attached or the cam receiver was attached with the position shifted. At times, it can be easily reassembled.

On the other hand, in the hinge for a folding door according to claim 4,
Each of the two plate portions constituting the blade is provided with a concave portion that forms a space when the plate portion is folded, and these concave portions have a depth capable of storing the cam receiver and the cam guide, When each of these concave portions is engaged with a dug hole formed in the door body, the outer peripheral edge of each concave portion is configured to contact the inner wall of the dug hole at at least two places. In particular, in claim 5, at least one of the recesses is formed in a quadrangular shape at four locations on the outer peripheral edge to abut against the inner wall of the dug hole. According to a sixth aspect of the present invention, at least one of the plate portions constituting the blade is provided with a protruding portion that comes into contact with an inner wall of a dug hole of the door body.

According to the hinge for a folding door of the present invention having such a configuration, the concave portion formed in the plate portion constituting the blade is
By making the outer peripheral edge a rectangular shape that abuts against the inner wall of the dug hole, the concave portion slightly bites into the inner wall of the dug hole at the corner of the rectangular shape, so that the positioning of the concave portion can be performed very easily, and The recess does not rotate or displace in the dug hole.

In the hinge for a folding door according to the seventh aspect, at least one of the plate portions constituting the blade is formed so as to cover the entire outer periphery of the digging hole of the door body. In particular, in the eighth aspect, in a state in which the cam guide is engaged with the engagement portion on the other plate portion side constituting the blade, the cam guide conceals the dug hole of the door together with the other plate portion. There is. Further, in the ninth aspect, at least a part of the cam guide is located on the same plane as the other plate portion when the cam guide is engaged with the engaging portion on the other plate portion side constituting the blade. There is.

According to the hinge for a folding door of the present invention having such a configuration, each plate portion constituting the blade and the cam guide attached to the plate portion respectively hide the entire outer periphery of the dug hole of the door body. Because it is formed to the size, the digging hole is not exposed around the hinge, and especially the beauty of furniture etc. is not damaged by the digging hole, and the digging hole is freely designed and formed It is possible to do.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hinge for a folding door according to the present invention will be described below with reference to the drawings. First Embodiment First, a first embodiment of a hinge for a folding door according to the present invention will be described with reference to FIGS. FIG.
1 is an exploded perspective view showing a state before assembly of a hinge for a folding door according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view showing a cam and a spring of the hinge for the folding door according to the embodiment shown in FIG. FIG. 3 is a view showing the folding door hinge according to the present embodiment shown in FIG.
(A) is a perspective view, (b) is an AA cross-sectional side view of (a). 4A and 4B are views showing a state after the assembly of the hinge for the folding door according to the present embodiment, wherein FIG. 4A is a perspective view, FIG. 4B is a cross-sectional side view taken along line BB of FIG. (C) is C
FIG. 4 is a cross-sectional side view taken along line C.

FIGS. 5A and 5B are views showing the assembled state of the hinge for the folding door according to the present embodiment, wherein FIG. 5A is a plan view and FIG. 5B is a bottom view. FIG. 6 is an enlarged cross-sectional view of a main part in a state in which the hinge of the folding door according to the present embodiment is in contact with a digging hole of a door body. 7A and 7B are explanatory diagrams of the hinge for the folding door according to the present embodiment as viewed from below the door body, wherein FIG. 7A illustrates a state where the door body is opened, and FIG. 7B illustrates a state where the door body is folded. Is shown.

As shown in these figures, the present embodiment
Two or more doors 1,2. . . Are hinges for folding doors (see FIG. 7), which are foldably connected to each other. The first and second blades 10 and 20 are foldably connected to each other.
The cam guide 6 includes a cam receiver 30 attached to the first blade 10 side and a cam 40 attached to the second blade 20 side. The cam guide 6 attaches the cam 40 to the second blade 20 side.
0 is detachably attached to the second blade 20.

Each of the first and second blades 10 and 20 is a plate-like member attached to each of the doors 1 and 2 constituting a folding door.
0 is inserted and foldably connected. The connection between the first and second blades 10, 20 is shown in FIG.
As shown in FIG. 2, the first blade 10 is provided with a tubular curl portion 13 through which the rivet 70 can be inserted.
Is formed with a pair of insertion portions 23, 23 having through holes located at both ends of the curl portion 13.

As shown in FIG. 1, the curl portion 13 has a pair of two curl portions 13 and 13 at the substantially center in the longitudinal direction so that a cam receiver 30 described later can be disposed.
Is formed upward from the end of the. On the other hand, the insertion portion 23 is located at both ends of the curl portion 13 and
As shown in FIG. 1, the first blade 10
The second blade 20 is formed upward from an end of the second blade 20 facing the second blade 20.

The curl portion 13 and the insertion portion 23
Constitutes the same plane when the two blades 10, 20 are opened in a state where the first and second blades 10, 20 are connected (see FIG. 7A), and is folded. Sometimes, the upper surfaces of the two blades 10 and 20 are configured to be overlapped in a surface-contact state (see FIG. 7B), and the first and second blades 10 and 20 have opposite ends. The rivet 70 is disposed at a position above the center where the rivet 70 is inserted.

The curl portion 13 and the insertion portion 2
3 through the rivet 70, the first blade 1
The 0 and the second blades 20 are foldably connected. As shown in FIG. 1, washers 73, 73 are provided between the curl portions 13, 13 inside the insertion portions 23, 23 of the second blade 20 through which the rivet 70 is inserted.
Is provided to reduce the frictional resistance between the two blades 10 and 20 during the folding operation of the hinge and to prevent the generation of sound.

In the present embodiment, the two plate-like members constituting the first and second blades 10 and 20 which are foldably connected via the rivets 70 in this embodiment each have a substantially central portion at the door 1. , 2 are formed so as to protrude in a concave shape on the side thereof, and the concave portions are bent so as to form the same plane and function as flanges fixed to the door bodies 1, 21. And a concave portion at the center is formed with a concave portion 12, which forms a space between both plate members when the first and second blades 10, 20 are folded.
22.

First, the respective plate portions 11 and 21 of the first and second blades 10 and 20 are located in a plate shape on both sides of the concave portions 12 and 22 formed at the center, and are screwed to the surface of the door body. It functions as a flange fixed by the like. Each of the plate portions 11 and 21 has a plurality of screw holes 11a and 21a through which fixing screws penetrate.
It can be screwed with a fixing screw arbitrarily.

Each of the plate portions 11 and 21 is formed with a digging hole 1a,
2a is formed in a size to cover the entire outer periphery. More specifically, the plate portions 11 and 12 of the present embodiment are formed by rectangular plate members, respectively.
However, as shown in FIG. 5 (b), it is configured to be larger than the entire circumference of the dug holes 1a and 2a formed on the door bodies 1 and 2 side. However, the plate portions 11 and 12 are not particularly limited to a rectangular shape, and may have any external shape as long as the plate members have an area capable of covering the dug holes 1a and 2a. It is possible. Further, in the present embodiment, the two plate portions 11 and 12 are both sized to cover the dug holes 1a and 2a, but at least one of the plate portions 1 and 12a.
Only 1 or 12 may cover the dug hole 1a or 2a.

As will be described later, the engaging portion 25 with which the engaging protrusion 65 provided on the rear end side of the cam guide 60 engages with the plate portion 21 of the second blade 20. The opening is provided at the rear end edge, and the outer edge of the digging hole 2a is exposed at the engagement portion 25 as shown in FIG. 5B. However, in the present embodiment, the dug hole 2a is hidden in a state where the engaging projection 65 of the cam guide 60 is engaged with the engaging portion 25, and the dug hole 2a is hidden in a state where the cam guide 60 is attached. 2a is not exposed.

Further, the plate portion 21 of the second blade 20 is formed with a digging hole 2a
Projecting portions 26, 26 abutting on the inner wall of the first member are formed. As shown in FIG. 6, the projecting portions 26, 26 project a part of the plate portion 21 toward the door body by cutting and bending, and contact the inner wall of the digging hole 2 a formed in the door body 2. It comes into contact. Here, in the present embodiment, the projecting portion 26 is brought into contact with two places on the inner wall of the digging hole 2a.
Although it is provided at two places of the plate portion 21, it can be provided at two or more places of the plate portion 21. Further, in the present embodiment, the protruding portion 26 is provided only on the second blade 20 side, but it may be provided on the first blade 10 side.

On the other hand, the concave portions 12 and 22 formed in the substantially central portions of the plate portions 11 and 12 of the first and second blades 10 and 20 are formed continuously with the plate portions 11 and 21 described above. In the state where the first and second blades 10 and 20 are folded and overlapped, a space is formed facing each other. Then, the two concave portions 1
The space formed by the camshafts 2 and 22 has a depth in which the cam receiver 30 and the cam guide 60 holding the cam 40 described later are housed between the two plate members (FIGS. 7A and 7B). reference).

The recesses 12 and 22 may have any depth as long as the space to be formed is accommodated between the two plate members with the cam receiver 30 and the cam guide 60. Instead of the bottomed concave portion in the embodiment, the plate portion 11,
A space may be formed by a hole penetrating through 12. Further, in the present embodiment, the concave portions 12 and 22 are provided with the plate portions 11 and 1.
2 are provided integrally by bending, and the concave portions 12 and 22 formed separately from the plate portions 11 and 12 are
It is also possible to constitute one blade by fixing to the periphery of the holes formed on the sides 1 and 12.

The recesses 12 and 22 engage with the digging holes 1a and 2a on the doors 1 and 2 when the blades 10 and 20 are attached to the door. When the recesses 12 and 22 are engaged with the digging holes 1a and 2a, the outer peripheral edge of each of the recesses 12 and 22 is formed so as to contact the inner wall of the digging hole at at least two places. is there.

That is, first, the concave portion 1 on the first blade 10 side
2, three rising surfaces 12a, 12b, and 12c are formed by bending three sides of the plate portion 11 except for the side on which the curl portion 13 is provided, as shown in FIG. A substantially rectangular quadrangular concave portion 12 is formed, and three end surfaces of the rising surfaces 12a, 12b, and 12c form a plate portion 11 that forms the same plane. Then, FIG.
As shown in FIG. 5, the four corners of the outer periphery of the rectangular concave portion 12 are formed to have a size in contact with the inner wall of the dug hole 1a.

On the other hand, the concave portion 22 on the second blade 20 side
As shown in FIG. 5, two sides excluding the side where the insertion portion 23 of the plate portion 21 is provided and the side opposite to this side are formed as a substantially square concave portion 22 having two raised surfaces 22a and 22b formed by bending. Yes, these two rising surfaces 22a, 22
The end surface of b constitutes the plate portion 21 on the same plane. The side of the recess 22 facing the insertion portion 23 is an opening without a rising surface, and the outer edge of the bottom of the recess has a circular arc shape corresponding to the circular shape of the digging hole 2a. Side 2
2c is formed.

Then, as described above, one side of the arc-shaped side 22c
As shown in FIG. 5 (b), the rectangular concave portion 22 provided with an outer peripheral edge of the arc-shaped side 22c comes into contact with the inner wall of the dug hole 2a. Here, in the present embodiment, as for the concave portion 22 on the second blade 20 side, the arc-shaped side 22c is brought into contact with the digging hole 2a.
Instead of this arc-shaped side 22c, the concave portion 1 on the first blade 10 side
As in the case of 2, the square portion may be brought into contact with the inner wall of the dug hole 2a at at least two of the four corners, preferably at the four corners. In this case, the head of the rivet 70 is formed in a dish shape so that the head of the rivet 70 does not interfere with the folding of the two blades 10 and 20, and the insertion portion 23 of the second blade 20 is so-called It is preferable to process it. The opening of the concave portion 22 without the rising surface constitutes an engaging portion 25 with which an engaging protrusion 65 of a cam guide 60 described later removably engages.

Thus, the first and second blades 10, 20
The recesses 12 and 22 formed at the outer peripheral edge
When the first and second blades 10 and 20 are attached to the doors 1 and 2 by contacting the inner walls of the two dug holes 1a and 2a, the dug holes 1a and 2a of the concave portions 12 and 22 are attached. Positioning can be easily performed, and a circular dug hole 1
The recesses 12 and 22 do not rotate or shift in the circumferential direction in the portions a and 2a. Here, from the viewpoint of facilitating positioning with respect to the dug holes 1a and 2a and effectively preventing displacement, the concave portions 12 and 2 are used.
2 is a dug hole 1 in at least two places on the outer peripheral edge.
It is preferable to form so as to be in contact with the inner walls of a and 2a.

In this embodiment, each of the plate portions 11 and 21 and the concave portions 12 and 22 constituting the first blade 10 and the second blade 20 described above, and the curl portions 13 and All of the insertion portions 23 are formed integrally by punching and bending a plate-like member constituting the first and second blades 10 and 20. Thus, the hinge of the present embodiment can realize a simple, inexpensive, and highly durable hinge for a folding door by bending a plate-shaped member. However, a part or all of each part constituting the hinge of the present embodiment may be replaced with, for example, the first blade 10 described above.
The plate portion 11 (21) of the (second blade 20) and the concave portion 12 (2
2) and the like can be separately constructed and assembled.

A cam receiver 30 is mounted on the first blade 10 and a cam guide 60 holding the cam 40 is mounted on the second blade 20, respectively. It is supposed to be. First,
The cam receiver 30 is attached to the first blade 10 through a rivet 70 inserted through the curl portion 13. As shown in FIG. 1, the cam receiver 30 has a curl portion 1 of the first blade 10 on the bottom surface side.
The rivet 70 penetrates and is fixed to the first blade 10 side so as not to fall off, engaging between the bottom 3 and 13 and the bottom end of the concave portion 12. Then, a contact portion 41 of a cam 40 attached to the second blade 20, which will be described later, comes into contact in a stepwise manner, and constitutes a cam means for regulating an opening angle of the first and second blades 10 and 20.

A through hole through which the rivet 70 penetrates is formed substantially at the center of the cam receiver 30, and the cam receiver 30 has a through hole.
Is disposed between the two curled portions 13, 13 so that the through hole communicates with the curled portion 13 so that the rivet 70 can be integrally inserted. Also, cam receiver 3
0 is in the direction around the axis of the rivet 70, that is,
A curved surface is formed along the folding rotation direction of the two blades 10 and 20, and a plurality of steps to which the cam 40 abuts are formed on the outer peripheral surface at predetermined intervals and heights.

Further, the periphery of the through hole of the cam receiver 30 is formed such that the outer peripheral edge protrudes toward the outer peripheral side of the end of the curl portion 13 so that the end of the curl portion 13 of the first blade 10 can be engaged. I have. When the cam receiver 30 is disposed between the two curled portions 13, the rivets 70 inserted through the curled portions 13 pass through the through holes of the cam receiver 30, and move toward the first blade 10. The cam receiver 30 is attached,
It is fixed.

On the other hand, on the second blade 20 side, the first blade 10
The cam 40 in contact with the cam receiver 30 on the side
It is designed to be attached while being held at zero. The cam 40 is slidably abutted along the outer periphery of the cam receiver 30 formed with the plurality of steps.
A contact portion 41 is on the leading end side that comes into contact with 0. Also,
Guide grooves 42, 42 extending in the contact direction with the cam receiver 30 are formed on both side surfaces of the cam 40, and guide protrusions 62, 62 of a cam guide 60, which will be described later, engage with the guide grooves. I have.

Further, as shown in FIG. 2, the cam 40 is formed with a spring housing hole 43 which is opened at the rear end side opposite to the contact portion 41. This spring storage hole 43 is
The cam 50 is open at the rear end side, and the inside of the cam extends in the cam receiving contact direction to form a hole closed at the front end side, so that the spring 50 can be housed inside.

The spring 50 keeps the cam 40 in the cam receiver 30 at all times.
Is provided in the spring accommodating hole 43 of the cam 40, so that the spring engaging projection 61 at the back end of the notch of the cam guide 60 is provided as described later.
And the cam 40 is constantly urged toward the cam receiver 30 side. The spring 50 is usually an elastic member composed of the coil spring shown in the present embodiment, but has a certain resilient force, and always urges the cam 40 toward the cam receiver 30 to form two springs. Any means may be used as long as the opening angle of the blades 10 and 20 can be regulated.

As shown in FIG. 1, the cam guide 60 is a guide member which is open at the tip end side of the cam receiver 30 and has a hollow frame with a center portion cut out. It is configured separately from the two blades 20 and is detachably attached to the second blade 20 as described later. The cam guide 60 has a spring locking projection 61 for locking the spring 50 at the back end of the notch, and the opposing inner surface of the notch is formed in a protruding shape extending toward the cam receiver 30. And the above-mentioned cam 4
The guide protrusions 62 engage with the guide grooves 42 provided on the side surface of the zero.

As shown in FIG. 1, hooks 64, 64 projecting in a hook shape toward the second blade 20 are formed on the tip end side of the cam guide 60 in the cam receiving contact direction. The claws 64, 64 protrude toward the second blade 20, and, as shown in FIGS. 1 and 3B, the tips of the hooks bend toward the side opposite to the cam receiving contact direction. It has a shape. On the other hand, on the second blade 20 side, the claw portions 64 of the cam guide 60,
Lock holes 24, 24 for detachably locking the holes 64 are formed. As shown in FIG. 3B, the locking holes 24, 24 have a shape in which the hole wall is inclined toward the side opposite to the cam receiving contact direction, corresponding to the shape of the claw portion 64. I have. As a result, when the cam guide 60 is urged by the spring 50 in the opposite direction to the cam receiver 30, the claw portion 64 and the locking hole 24
Are locked to each other and firmly fixed.

Further, on the rear end side of the cam guide 60 in the cam receiving contact direction, an engaging projection 65 engaging with the second blade 20 side is provided.
Is provided. The engagement protrusion 65 is formed in a flat plate shape that is the same plane as the plate portion 21 on the second blade 20 side, and has stepped portions 65a, 65a that protrude toward both side surfaces of the cam guide 60.
Is formed.

As described above, the second blade 20 has an opening on one side of the concave portion 22 without a rising surface, so that the engaging projection 65 of the cam guide 60 can be freely attached and detached. And an engaging portion 25 that engages with. That is, as shown in FIG. 1, the engaging portion 25 is an opening having a width capable of engaging with the flat plate portion of the engaging protrusion 65, and both step portions 65 a, 65 a of the engaging protrusion 65. The stopper portions 25a, 25a to which are locked extend from the plate portion 21 toward the inside of the concave portion 22. The width of the opening of the engaging portion 25 is
As shown in FIG. 3A, the second blade 20 is preferably formed to be at least larger than the width direction of the cam guide 60 so that the cam guide 60 can pass and be inserted from the rear end direction.

The engaging projection 65 is connected to the cam guide 60
, The two steps 65a are connected to the stopper 2
5a, the engagement protrusion 65 removably engages with the engagement portion 25, and as shown in FIG. When engaged with the engagement portion 25, the second blade 20 is located on the same plane as the plate portion 21.

In the second blade 20, FIG.
As shown in (a) and (b), when the cam guide 60 is attached to the second blade 20 and the engagement protrusion 65 is engaged with the engagement portion 25, the engagement protrusion 65 and the plate portion 21 are engaged. Are integrated to hide the digging hole 2a of the door body 2 described above. Thus, in the present embodiment, even if an opening is formed in the plate portion 21 to provide the engaging portion 25 on the second blade 20 side to which the cam guide 60 is detachably engaged, the cam guide 60 forms the digging hole. Since the hole 2a can be concealed, it is not necessary to provide another component or the like to cover and hide the digging hole 2a.

As described above, the plate portion 21 of the second blade 20
The cam guide 60, which forms the same surface integrally with the digging hole 2a and conceals the outer edge of the digging hole 2a, is sufficient. In the present embodiment, the cam guide 60 shown in FIGS.
As shown in (a), at least a part (engaging protrusion 65) of the cam guide 60 is located on the same plane as the plate portion 21 in a state of being engaged with the engaging portion 25 of the second blade 20. It is configured in. However, the entirety of the cam guide 60 is
2 to form the same plane as the plate portion 21 of the second blade 20.

The cam guide 60 having the above configuration
Then, by engaging the cam 40 containing the spring 50, the cam 40 is guided so as to be movable along the front and rear directions in which the spring 50 is urged. Then, the cam guide 60 is attached to the second blade 20 side by engaging the claw portion 64 with the engaging hole 24 and engaging the engaging protrusion 65 with the engaging portion 25, thereby attaching the cam 40 to the second blade 20 side. Cam receiver 3
It can be attached to the second blade 20 side so as not to fall off while being in contact with the outer periphery of the zero. In addition, as described later, the cam guide 60 is pressed and moved forward to release the engagement between the claw portion 64 and the engagement hole 24 and the engagement between the engagement protrusion 65 and the engagement portion 25, so that The cam guide 60 is the second blade 20
Can be easily removed from the side. Thus, in the present embodiment, the mounting portion between the cam guide 60 and the second blade 20 is configured to be detachable.

Next, the procedure for assembling the hinge for a folding door according to this embodiment having the above-described configuration will be described. First, the first blade 10 and the second blade 20 are connected while attaching the cam receiver 30. First, as shown in FIG. 1, the cam receiver 30 is engaged between the two curled portions 13 of the first blade 10, and washers 73, 73 are provided between both ends of the curled portion 13 and the inside of the insertion portion 23. Intervene. And
In this state, the rivet 70 is integrally inserted into each part from the one insertion part 23 side. After the rivet 70 is inserted, the end of the rivet 70 is swaged so that the first blade 10
And the second blade 20 and the cam receiver 30 are irremovably connected (the state shown in FIG. 3).

As described above, the first blade 10 and the second blade 2
Since the cam 40 and the cam guide 60 are not attached at the time of connection of the first and second blades 10, the connection work of the first and second blades 10 and 20 is extremely easy without being affected by the urging force of the spring 50 at all. Can be done. The first and second blades 1 before attaching the cam guide 60 in this manner.
Since the two blades 10 and 20 and the cam guide 60 can be separately managed and stored in a state where 0 and 20 are connected, even when the urging force of the spring 50 needs to be changed, the hinges can be used. The spring 50 alone can be replaced easily and quickly without disassembling, and the spring 50 and each part of the hinge are not damaged or broken at all. further,
Before caulking the rivet 70, for example, the washer 7
Even when there is a mistake in the assembling work, such as when the attachment of the cam receiver 30 is forgotten or when the cam receiver 30 is attached out of position, reassembly can be easily performed.

Next, a cam guide 60 for holding the cam 40 is attached to the side of the second blade 20 connected to the first blade 10, thereby finally completing the assembly of the hinge.
To attach the cam guide 60 to the second blade 20, first, as shown in FIGS. 1 and 2, the spring 50 is housed in the spring housing hole 43 of the cam 40, and in that state, the cam 40 is 60. At this time,
The cam 40 is inserted from the distal end opening of the cam guide 60 on the cam receiver 30 side with the spring 50 facing the cam guide 60 side, and the guide protrusions on the cam guide 60 side are inserted into the guide grooves 42 on both sides of the cam 40. While engaging the parts 62, 62,
The spring locking projection 61 at the back end of the cam guide 60 is inserted into the end of the spring 50. Thereby, the assembly of the cam guide 60, the cam 40, and the spring 50 is completed.

In this state, the cam guide 60 is connected to the second blade 2
Attach it to the 0 side. First, as shown in FIG. 3, the cam guide 60 is disposed from above the rear end side of the engaging portion 25 of the second blade 20, and the front end side where the claw portion 64 of the cam guide 60 is provided in the concave portion 22. Insert while pointing. In this state, the cam guide 60 is pressed from the rear side on the engagement protrusion 65 side,
0 is moved forward in a state of contact with the cam receiver 30 side. At this time, the cam guide 60 is urged rearward by the elastic force of the spring 50, but further moves the cam guide 60 forward in the recess 22 against the urging force of the spring 50. . Since the engaging portion 25 is open at the rear end side of the second blade 20, the cam guide 60 can be pressed forward and moved forward by using this opening. At this time, the cam guide 60
The operation can be easily performed by using a pressing jig or the like.

The cam guide 6 having moved forward in the recess 22
In FIG. 4, as shown in FIG. 4, at the same time as the claw portions 64 on the front end side fall into the locking holes 24 on the concave portion 22, the engagement protrusion 65 on the rear end side is opened by the rear opening of the plate portion 21. It fits into the configured engaging portion 25. When the pressing of the cam guide 60 is released in this state, the cam guide 60 is urged rearward by the urging force of the spring 50, so that the claw portion 64 and the locking hole 24 are firmly engaged, and the engagement protrusion 65 And the stopper portion 25a of the engaging portion 25 abuts and locks. At this time, the claw portion 64 and the locking hole 24 are respectively
0, the engagement is not loosened as long as there is a biasing force of the spring 50, and the cam guide 60 is firmly attached to the second blade 20 side, so that the cam guide 60 does not fall off. Absent. This completes the hinge assembly (state shown in FIG. 4).

The hinge that has been assembled is attached to the doors 1 and 2 and used as a hinge for a folding door. When hinges are attached to the doors 1 and 2, the first blade 10 is attached to one door 1, and the second blade 2 is attached to the other door 2.
0 is attached and both door bodies 1 and 2 are connected. Since the door bodies 1 and 2 have the dug holes 1a and 2a formed at the corresponding positions, respectively, the dug holes 1a and 2a are respectively provided with the concave portions 12 and 12 of the first and second blades 10 and 20. 22 is engaged.

At this time, the concave portion 12 of the first blade 10 is formed with
5B, it can be easily positioned as shown in FIG. 5B, and the concave portions 1 are formed at four contact portions.
Since the recesses 2 slightly bite into the inner wall of the digging hole 1a, the concave portion 12 does not displace in the digging hole 1a. Similarly, the concave portion 22 of the second blade 20 has an arcuate side 22
c abuts on the inner wall of the digging hole 2a at the outer peripheral edge, and the projection 26 cut and bent on the plate portion 21 abuts on the digging hole 2a at two places. Positioning is possible, and the concave portion 22 and the protruding portion 26 slightly bite into the inner wall of the digging hole 2a,
The concave portion 22 does not shift.

In this state, the first and second blades 10, 20
Are in surface contact with the surfaces of the door bodies 1 and 2 around the dug holes 1a and 2a.
The plate portions 11 and 21 and the door bodies 1 and 2 can be fixed by driving a fixing screw into the 21 through the screw holes 11a and 21a. This completes the installation of the hinges on the doors 1 and 2 (the state shown in FIG. 7).

In this state, as shown in FIG.
Since the cam 40 of the second blade 20 is in contact with the cam receiver 30 of the first blade 10 by the urging force of the spring 50, the first and second blades 10, 20 rotatably connected to each other.
Is restricted, and the door can be opened or folded at a desired angle (see FIG. 7). In addition, the respective plate portions 11 and 21 of the first and second blades 10 and 20 are respectively provided with doors 1 and 2.
2 are formed so as to cover the entire outer periphery of the digging holes 1a and 2a, and as shown in FIG.
a and 2a are not exposed around the hinge.

Further, in the present embodiment, when the two blades 10 and 20 are folded, the cam receiver 30 and the cam guide 60 are moved by the concave portions 12 and 22 of the first and second blades 10 and 20. , 22 are accommodated in the space formed by the first and second blades 10 and 20 as shown in FIG. 7B. Therefore, the door bodies 1 and 2 can be folded to a state where there is no gap between them, and when folded, it is less likely that a user or the like will pinch a hand or finger.

On the other hand, when the cam guide 60 is to be removed from the hinge that has been assembled, it can be performed in a procedure reverse to the above-described assembly procedure. That is, first, the second blade 2
The cam guide 60 attached to the cam holder 30 is pressed and moved forward in the recess 22 toward the cam receiver 30 using a jig or the like. At this time, since the rear end side of the cam guide 60 can be pressed from the engaging portion 25 opened to the rear end side of the second blade 20, the cam guide 60 can be easily moved forward. When the cam guide 60 moves forward, the engagement between the claw portion 64 and the locking hole 24 is released. Similarly, the engagement between the engagement protrusion 65 and the engagement portion 25 is released. Therefore, by raising the cam guide 60 upward in this state, the cam guide 60 can be removed from the second blade 20 side.

As described above, according to the hinge for a folding door according to the present embodiment, the mounting portion of the cam guide 60 and the second blade 20 is made detachable, so that the two blades 10, 2
At the time of connection of 0, there is no need to mount the cam 40 and the cam guide 60. Thereby, the two blades 10 and 20 are not affected by the biasing force of the spring 50 at all.
And the hinge assembly operation can be performed extremely easily and quickly.

According to the hinge of this embodiment, the cam 4
Before attaching the cam guide 60 and the cam guide 60, the two blades 1
It is possible to manage and keep the cam guide 60 separately from the cam guide 60 in a state in which the cam 40 and the spring 20 are connected. Further, even after the completion of the butterfly program, the cam 40 and the spring can be easily removed simply by removing the cam guide 60 from the blade side. 50 can be removed from the hinge side. As a result, even when the urging force of the spring 50 needs to be changed, the spring 5 is not disassembled and the spring 50 and each part are not damaged.
Only 0 can be easily replaced, and the design of the hinge can be changed very easily. Further, before caulking the rivet 70 connecting the two blades 10 and 20, for example, forgetting to attach the washer 73 or the like,
Even when there is a mistake in the assembling work, such as when the cam receiver 30 is mounted in a displaced position, the reassembly can be easily performed.

[Second Embodiment] Next, a second embodiment of the hinge for a folding door according to the present invention will be described with reference to FIGS. FIG. 8 is an exploded perspective view showing the hinge for the folding door according to the second embodiment of the present invention before assembly. FIG.
Is a perspective view of the hinge for the folding door according to the present embodiment,
(A) shows a state during assembly, and (b) shows a state after assembly is completed. FIG. 10 is a sectional side view of the hinge for the folding door according to the present embodiment, taken along the line DD in FIG. 9.

As shown in these figures, the hinge for a folding door according to the present embodiment is an embodiment in which the concave portions provided in the first and second blades in the above-described first embodiment are omitted, and the other parts are the same. , And has almost the same configuration as the hinge for the folding door according to the first embodiment. Therefore, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

That is, in the present embodiment, the first and second blades 10 and 20 are provided with the concave portions 12 and 2 in the first embodiment.
It is composed of flat plate portions 11 and 21 without 2. Each of the plate portions 11 and 21 is provided with a curl portion 13, an insertion portion 23, and screw holes 11a and 21a similar to those in the first embodiment.

Further, in the present embodiment, the locking hole 24 in which the claw portion 64 of the cam guide 60 provided on the second blade 20 is locked.
Are formed directly on the plate portion 21. Further, in the present embodiment, the engaging protrusion 65 on the cam guide 60 side has, in this embodiment, a stepped portion that is orthogonally engaged with the plate portion 21 side and protrudes downward from both side surfaces of the cam guide 60. The engaging portion 25 on the 21 side also has a groove in which the engaging protrusion 65 can be orthogonally locked.
Are formed in parallel with the rear edge. Other components are the same as those of the hinge of the first embodiment, and the procedure for assembling the hinge and the method of attaching the hinge to the door are the same as those of the first embodiment.

With the hinge for a folding door according to the present embodiment having such a structure, assembling and disassembling operations of the hinge can be performed very easily, as well as the hinge of the first embodiment. The attachment and detachment and replacement work can be performed freely. Further, in the present embodiment, the plate portions 11 and 21 constituting the first and second blades 10 and 20 have no portions to be bent and punched except for the curl portion 13 and the insertion portion 23, so There is also an effect that the structure is simplified and the number of manufacturing steps is reduced as compared with the embodiment. In particular, in the present embodiment, since the first and second blades 10 and 20 are not provided with a concave portion, a folding door that does not need to provide a digging hole in the door body, or a folding door in which the digging hole cannot be formed. Suitable for connecting doors.

[0080]

As described above, according to the hinge for a folding door of the present invention, the cam for opening the door at a desired angle by restricting the rotation of the two blades rotatably connected to each other. The cam guide holding the cam is detachably attached to the blade side, thereby facilitating the assembly and disassembly of the hinge, and also allows the elastic member such as a spring for biasing the cam to be freely attached and detached and replaced. be able to.

Further, according to the present invention, even when the blade constituting the hinge is engaged with the digging hole on the door body and mounted, the hinge is positioned on the digging hole side only by a simple and inexpensive structure. Can be easily performed, the displacement of the hinge can be reliably prevented, and the dug hole of the door body can be covered without being exposed around the hinge.

[Brief description of the drawings]

FIG. 1 shows a hinge for a folding door according to a first embodiment of the present invention;
FIG. 3 is an exploded perspective view showing a state before assembly.

FIG. 2 is an exploded perspective view showing a cam and a spring of the hinge for the folding door according to the first embodiment of the present invention.

FIG. 3 shows a hinge for a folding door according to the first embodiment of the present invention;
It is a figure which shows the state in the middle of an assembly, (a) is a perspective view,
(B) is a sectional side view taken along the line AA of (a).

FIG. 4 shows the hinge for a folding door according to the first embodiment of the present invention.
It is a figure which shows the state after assembly completion, (a) is a perspective view,
(B) is a cross-sectional side view taken along the line BB of (a), and (c) is a cross-sectional side view taken along the line CC.

FIG. 5 shows the hinge for the folding door according to the first embodiment of the present invention.
It is a figure which shows the state after assembly completion, (a) is a top view,
(B) is a bottom view.

FIG. 6 is an enlarged sectional view of a main part in a state in which the hinge for a folding door according to the first embodiment of the present invention is in contact with a digging hole of a door body, showing a protruding part.

FIGS. 7A and 7B are explanatory views of the folding door hinge according to the first embodiment of the present invention as viewed from below the door body, where FIG. 7A is a state where the door body is opened, and FIG. 7B is a state where the door body is folded. It shows the state of the error.

FIG. 8 shows a hinge for a folding door according to a second embodiment of the present invention.
FIG. 3 is an exploded perspective view showing a state before assembly.

9A and 9B are perspective views of a hinge for a folding door according to a second embodiment of the present invention, wherein FIG. 9A shows a state in the middle of assembly, and FIG. 9B shows a state after assembly is completed.

FIG. 10 is a cross-sectional side view of the hinge for a folding door according to the second embodiment of the present invention, taken along line DD in FIG. 9;

FIG. 11 is an exploded perspective view showing a conventional hinge for a folding door in a state before assembly.

FIG. 12 is a perspective view showing a conventional hinge for a folding door;
(A) shows a state during assembly, and (b) shows a state after assembly is completed.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 door body 1a dug hole 2 door body 2a dug hole 10 first blade 11 plate portion 12 concave portion 20 second blade 21 plate portion 22 concave portion 24 locking hole 25 engaging portion 26 projecting portion 30 cam receiver 40 cam 50 spring 60 cam guide 64 pawl 65 engaging projection 70 rivet

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[Procedure amendment]

[Submission date] June 26, 1998 (1998.6.2
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

By engaging a cam 140 containing a spring 150 with a cam guide 160 provided on the second blade 120, the cam 140 is movably guided along the front and rear directions in which the spring 150 is urged. It turned so that
I have . Further, by connecting the first blade 110 and the second blade 120 with the rivet 170 with the cam 140 attached to the cam guide 160, the cam 140 is brought into contact with the outer periphery of the cam receiver 130 by the urging force of the spring 150. The two blades 11 rotatably connected by the contact between the cam 140 and the cam receiver 130
The rotation of 0, 120 is regulated. Thus, the door body to which each of the blades 110 and 120 is attached can be opened or folded at a desired angle, thereby forming a folding door that can be opened and closed.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0037

[Correction method] Change

[Correction contents]

Each of the plate portions 11 and 21 is formed with a digging hole 1a,
2a is formed in a size to cover the entire outer periphery. Specifically, the plate portion 11, 21 of the present embodiment, Yes formed by the plate member of each square shape, of the rectangular plate portion 11, 21
However, as shown in FIG. 5 (b), it is configured to be larger than the entire circumference of the dug holes 1a and 2a formed on the door bodies 1 and 2 side. However, the plate portions 11 and 21 are not particularly limited to a rectangular shape, and may have any external shape as long as the plate members have an area capable of covering the dug holes 1a and 2a. It is possible. Further, in the present embodiment, the two plate portions 11 and 21 are both sized to cover the dug holes 1a and 2a.
Only the hole 1 or 21 may cover the dug hole 1a or 2a.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction contents]

Further, the plate portion 21 of the second blade 20 is formed with a digging hole 2a
Projecting portions 26, 26 abutting on the inner wall of the first member are formed. As shown in FIG. 6, the projecting portions 26, 26 project a part of the plate portion 21 toward the door body by cutting and bending, and contact the inner wall of the digging hole 2 a formed in the door body 2. It comes into contact. Here, in the present embodiment, the projecting portion 26 is brought into contact with two places on the inner wall of the digging hole 2a.
Although it is provided at two places of the plate portion 21, it can be provided at two or more places of the plate portion 21. In addition, the protrusion 26
Is provided only on the second blade 20 side in the present embodiment, but may be provided on the first blade 10 side.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction contents]

On the other hand, the concave portions 12 and 22 formed in the substantially central portions of the plate portions 11 and 21 of the first and second blades 10 and 20 are formed continuously with the plate portions 11 and 21 described above. In the state where the first and second blades 10 and 20 are folded and overlapped, a space is formed facing each other. Then, the two concave portions 1
The space formed by the camshafts 2 and 22 has a depth in which the cam receiver 30 and the cam guide 60 holding the cam 40 described later are housed between the two plate members (FIGS. 7A and 7B). reference).

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction contents]

The recesses 12 and 22 may have any depth as long as the space to be formed is accommodated between the two plate members with the cam receiver 30 and the cam guide 60. Instead of the bottomed concave portion in the embodiment, the plate portion 11,
A space may be formed by a hole passing through 21 . Further, in the present embodiment, the concave portions 12 and 22 are formed by the plate portions 11 and 2.
1 are provided integrally by bending, and the concave portions 12 and 22 formed separately from the plate portions 11 and 21 are formed in the plate portion 1.
It is also possible to form one blade by fixing to the peripheral edge of the hole formed on the side of the first and the 21st .

Claims (9)

[Claims] 1. A hinge for a folding door constituting a folding door by connecting two or more doors in a foldable manner, wherein the hinge is attached to each of the doors constituting the folding door, and is foldably connected. A blade comprising two plate portions, a cam receiver disposed on one plate side of the blade, a cam slidably contacting the outer periphery of the cam receiver, and An elastic member that urges the blade in the contact direction of the receiving member; and a guide that movably guides the cam along the direction of urging of the elastic member, while the cam is in contact with the outer periphery of the cam receiver. A hinge for a folding door, comprising: a cam guide attached to the other plate portion side; and the cam guide and the attachment portion on the other plate portion side are configured to be detachable. 2. The cam guide further includes a claw projecting in a hook shape toward the other plate portion of the blade on a tip end side of the cam in the cam receiving contact direction, and the other plate portion includes The hinge for a folding door according to claim 1, further comprising a locking hole in which the claw portion of the cam guide is detachably locked. 3. The cam guide further includes an engaging protrusion on the rear end side of the cam in the cam receiving contact direction, the engaging protrusion engaging with the other plate portion of the blade. The hinge for a folding door according to claim 1 or 2, further comprising an engagement portion with which the engagement protrusion is detachably engaged. 4. A recess which forms a space when the plate is folded when each of the two plates constituting the blade is provided, and these recesses can accommodate the cam receiver and the cam guide. The outer peripheral edge of each of the recesses abuts at least two places on the inner wall of the recess when the recesses are engaged with the recesses formed in the door body. , 2 or 3, hinge for a folding door. 5. The hinge for a folding door according to claim 4, wherein at least one of the recesses is formed in a quadrangular shape at four locations on the outer peripheral edge to abut against the inner wall of the dug hole. 6. The hinge for a folding door according to claim 4, wherein at least one of the plate portions constituting the blade has a protruding portion which is in contact with an inner wall of a dug hole of the door body. 7. The hinge for a folding door according to claim 4, wherein at least one of the plate portions constituting the blade is formed so as to cover the entire outer periphery of the dug hole of the door body. 8. The digging hole of the door body together with the other plate portion when the cam guide is engaged with the engaging portion on the other plate portion side constituting the blade. , 5, 6 or 7. 9. The cam guide according to claim 4, wherein at least a portion of said cam guide is located on the same plane as said other plate portion when said cam guide is engaged with said engaging portion on said other plate portion side. , 5, 6, 7 or 8 hinges for folding doors.