JPH07317423A - Caster of folding door - Google Patents

Abstract

PURPOSE:To provide a folding door caster in which any gap is not generated and the door caster body is smoothly rotated and transferred and less consumed and hardly broken and further, rotated without troubles even in the case of a thin folding door. CONSTITUTION:A door caster body 2 is installed at the lower end of the fitting axial center rod 1 so as to be horizontally rotatable to form a door caster 3. On the other hand, a large recessed hole 5 is made to contain the door caster body 2 of the door caster 3 at the lower end face near the side edge of the folding door 4 so as to be horizontally rotatable and a small recessed hole is formed to insert and fix the fitting axial center rod 1 of the door caster 3 at the upper face of the inner bottom of the large recessed hole 5. A nearly circular ring-form recessed step 7 in plan view is formed at the opening periphery of the small recessed hole 6. A guide ring 8 fitted in the ring-form recessed step 7 to be freely rotatable is installed at the joint of the fitting axial center rod 1 of the door caster 3 and the door caster body 2 and further, the door caster 3 is fitted to the lower end near the side edge of the folding door 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding door door apparatus which is provided at a lower end near a side end portion of a folding door and movably supports the folding door.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 6 and 7, a door roller device for a folding door, in which a door roller (b) is horizontally rotatably attached to a lower end near a side end portion of the folding door (a), has been used. Are known.

In the folding door door apparatus, a door roller (b) is attached to a mounting shaft core rod (c) and a lower end of the mounting shaft core rod (c) so as to be horizontally rotatable. ) And are formed by. The door shaft (b) is inserted and fixed in the lower hole (e) formed in the lower end surface of the folding door (b) near the side end of the folding door (b), so that It is installed. Also, the door roller body (d) of the door roller (b)
Has a vertically rotatable wheel (f), and the wheel (f) rollably travels on a lower rail (g) fixed to the floor surface. The folding door (a) is a double-folding door, and a pair of panels (h) are foldably connected by a hinge (d). A fixed shaft (nu) is provided at one side end of the folding door (a), the door roller (b) is provided at a lower end near the other side end, and a wheel (f) of the door wheel (b) is provided. ) Rolls along the lower rail (g), the folding door (a) is bent or extended to be opened and closed.

[0004]

However, in the above-mentioned conventional technique, since the door roller main body (d) of the door roller (b) projects from the lower end of the folding door (a), the folding door (a) is There was a problem that a gap was generated below.

In that case, as shown in FIG. 8, a recessed hole (L) is formed in the lower end surface near the side end of the folding door (A), and the door roller (B) of the door roller is installed in the recessed hole (L). It is considered that the main body (d) should be housed so as to be rotatable in the horizontal direction. However, in this case, the door roller main body (d) is apt to swing during its rotation, and the outer wall of the door roller main body (d) may slidably contact the inner wall of the recessed hole (le). The rotation of (d) is not smooth and the drivability is poor, and the door roller body (d) is easily worn and damaged, resulting in a shorter life.

The present invention has been invented to solve the above-mentioned problems in the prior art. That is, the problem is that no gap is formed below the folding door and the door roller body rotates smoothly. It is an object of the present invention to provide a door roller device having a folding door, which has good running property and is hard to be consumed and damaged.

[0007]

According to another aspect of the present invention, there is provided a door roller device for a folding door, wherein a door roller main body is provided at a lower end of a mounting shaft core rod so as to be horizontally rotatable, while the door roller is formed. A large concave hole is formed in the lower end surface near the side end of the folding door to allow the door roller body of the door roller to be rotatably in the horizontal direction, and the axle shaft rod of the door roller is inserted and fixed on the upper surface of the inner bottom of the large concave hole. Is formed, a ring-shaped recessed step portion having a substantially circular shape in plan view is formed at a hole edge portion of the small recessed hole, and a guide ring body rotatably fitted in the ring-shaped recessed step portion is formed. The door roller is provided at the connecting portion of the door shaft mounting rod and the door roller main body, and the door roller is attached to the lower end near the side end portion of the folding door. This configuration solves the above problem.

According to a second aspect of the present invention, a folding door door roller device is characterized in that, in the folding door door roller device according to claim 1), the guide wheel is fixed to the door roller main body side. .

According to a third aspect of the present invention, a folding door door roller device is characterized in that, in the folding door door roller device according to claim 1), the guide wheel is formed by a bearing.

According to a fourth aspect of the present invention, there is provided a folding door door roller device in the folding door door roller device according to the first aspect, in which the door roller body is elastically struck downward with respect to the mounting shaft core rod. It is characterized by making it project.

According to a fifth aspect of the present invention, there is provided a folding door door roller device, wherein in the folding door door roller device according to the fourth aspect, the vertical height dimension of the annular concave step portion is the vertical height of the guide wheel body. It is characterized in that it is formed larger than the size.

[0012]

In the door roller device for a folding door according to claim 1) of the present invention, the mounting shaft core rod of the door roller is inserted and fixed in a small recessed hole formed in the upper surface of the inner bottom of the large recessed hole, and the mounting shaft core. Since the door wheel main body, which is provided at the lower end of the rod so as to be horizontally rotatable, is housed in the large recessed hole, the door wheel main body is prevented from protruding from the lower end of the folding door, and a large gap is formed below the folding door. Does not occur. Moreover, the guide ring body provided at the connecting portion between the mounting shaft core rod and the door roller main body is rotatably fitted in the ring-shaped concave step portion formed in the hole edge portion of the small recessed hole and having a substantially circular shape in plan view. Therefore, the swinging movement of the door roller main body during the rotation in the large concave hole is prevented, the door roller main body rotates smoothly, its running property is good, and it is hard to be consumed or damaged.

In a folding door door apparatus according to a second aspect of the present invention, in particular, since the guide wheel body is fixed to the door wheel body side of the door wheel, the door wheel body rotates integrally with the guide wheel body. Then, the swinging movement is surely prevented.

In the folding door door apparatus according to the third aspect of the present invention, particularly, since the guide wheel body is formed of the bearing, the door wheel body and the door wheel body can be rotated more smoothly.

In the folding door door apparatus according to claim 4 of the present invention, in particular, since the door roller main body of the door roller is elastically urged and projected downward with respect to the mounting shaft core rod, the folding door door is folded. The shock caused by the vertical movement during opening and closing travel is buffered by the resilience of the main body of the door car.

According to a fifth aspect of the present invention, in the folding door door apparatus, in particular, when the folding door is moved up and down during the cushioning action, the vertical height of the annular concave step portion is the vertical height of the guide ring. Since it is formed larger than the size,
It is difficult for the guide wheel body to come off from the ring-shaped recessed step portion, so that the door wheel body can be smoothly rotated.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A folding door door roller device shown in FIGS. 1, 2, 3 and 4 is an embodiment of the present invention, in which a door roller main body 2 is provided at a lower end of a mounting shaft core rod 1 so as to be horizontally rotatable. To form the door roller 3, while the door roller 3 is formed on the lower end surface near the side edge of the folding door 4.
Large concave hole 5 in which the door roller main body 2 is housed so as to be horizontally rotatable.
And a small concave hole 6 into which the mounting shaft rod 1 of the door roller 3 is inserted and fixed is formed on the inner bottom surface of the large concave hole 5, and the hole edge portion of the small concave hole 6 has a substantially circular shape in plan view. A ring-shaped recessed step portion 7 is formed, and a guide wheel body 8 rotatably fitted in the ring-shaped recessed step portion 7 is provided at a connecting portion between the mounting shaft core rod 1 of the door roller 3 and the door roller main body 2. The door roller 3 is attached to the lower end near the side edge of the folding door 1.

The folding door 4 is a double folding door, and is formed by a pair of wooden panels 9 which are hingedly connected by a hinge 10. Guide runners 11 project from the upper ends of both ends of the folding door 4, and the door rollers 3 are provided at the lower ends of both ends of the folding door 4. Wheels 12 provided on the door roller main body 2 of the door roller 3 are rotatably engaged and mounted on lower rails 13 fixed to the floor surface, and the guide runners 11 are fixed to the ceiling surface. By being slidably engaged with the upper rails 14, respectively, the folding door 4 is load-supported on the lower side and can be folded and traveled. A latch 15 detachably locked to the upper rail 14 is provided at the upper end near the panel connecting portion of the folding door 4, and the lower end of the latch 15 is detachably attached to the lower rail 13 so as to be vertically moved. Lock to be locked
16 is provided vertically, and the latch 15 or the lock 16 is locked to the upper rail 14 and the lower rail 13, whereby the closed and extended state of the folding door 4 is maintained.

A large concave hole 5, a ring-shaped concave stepped portion 7 and a small concave hole 6 are formed at the lower ends of both ends of the folding door 4 so as to have three sizes of inner diameters of large, medium and small. A mounting shaft core rod 1 is inserted into and fixed to the shaft 6. The mounting shaft core rod 1 is formed as a cylindrical body 17, and a tapered ridge 20 is provided on the outer periphery of the cylindrical body 17 so that the tapered ridge 20 is formed on the inner peripheral surface of the small recess hole 6. By being locked, the mounting shaft core rod 1 is firmly fixed so as not to come off. A collar-shaped portion 21 is projectingly provided on the outer peripheral portion of the lower end of the cylindrical body 17, and the collar-shaped portion 21 is housed and fitted inside the upper bottom of the ring-shaped concave step portion 7. Same mounting shaft core rod 1
A spring 18 is housed in a cylindrical body 17 that serves as a core. The elastic body 18 elastically restores a shaft 19 that serves as a rotational axis of the door roller main body 2 from the lower end of the cylindrical body 17. It is installed vertically. A door roller main body 2 is rotatably fixed to a lower end of the shaft body 19, and a guide wheel body 8 formed of a bearing is integrally attached to an upper side of the door roller main body 2. In this case, the guide ring body 8 is fixed so as not to move upward by the collar-shaped piece 22 integrally provided on the outer periphery of the shaft body 19 so as to project. Further, the shock caused by the vertical movement of the folding door 4 when the folding door is opened / closed is buffered by the spring 18, and at this time, the guide wheel 8 moves up and down in the annular concave step portion 7 of the folding door 4. Can be accommodated freely. The guide wheel body 8 is rotatably fitted in the ring-shaped concave step portion 7, whereby the swinging movement of the shaft body 19 and the door roller main body 2 is reliably prevented.

A door block that constitutes the main body of the door roller main body 2
23 is integrally molded of synthetic resin or metal, and is formed in a bottomed cylindrical shape that opens downward. A mounting metal fitting 24 having a substantially hat-shaped cross section is housed and fixed in the door roller block 23, and the wheel 12 is axially fixed to the mounting metal fitting 24. In this case, a screw 25 that is inserted into the lower piece portion of the mounting bracket 24 from below is integrally built up on the inner circumference of the door roller block 23, and is built up.
By being screwed into the lower end of 26, the mounting bracket 24
Is housed and fixed in the door block 23. The outer peripheral diameter of the door roller main body 2 formed by the door roller block 23 is formed slightly smaller than the inner peripheral diameter of the large recessed hole 5, and the guide wheel body 8 is formed.
The outer peripheral diameter of is slightly smaller than the inner peripheral diameter of the annular recessed step portion 7.

Therefore, in the folding door door apparatus of this embodiment, the cylindrical body 17 which serves as the mounting shaft core rod 1 of the door wheel 3 is inserted and fixed in the small concave hole 6 formed on the upper surface of the inner bottom of the large concave hole 5. Since the door wheel main body 2 that is horizontally rotatably provided at the lower end of the shaft body 19 that projects downward from the cylindrical body 17 is accommodated in the large recessed hole 5, the folding door 4 of the door wheel main body 2 is accommodated. Is prevented from protruding from the lower end, and a large gap does not occur below the folding door 4. Moreover, the guide ring body 8 provided at the connecting portion of the mounting shaft core rod 1 of the door roller 3 and the door roller body 2 is formed in the hole edge portion of the small recessed hole 6 and has a substantially circular ring shape in plan view. Since it is rotatably fitted in the door 7, the door roller main body 2
The swing motion during rotation in the large recessed hole 5 is prevented, the door roller main body 2 smoothly rotates, its running property is good, and it is hard to be worn or damaged.

Further, in the folding door door roller device of the embodiment, since the guide wheel body 8 is fixed to the door wheel body 2 side of the door roller 3, the door wheel body 2 is integrally formed with the guide wheel body 8. The swinging motion is surely prevented. Further, since the guide wheel 8 is formed by the bearing, the door wheel body 2 and the door wheel main body 2 can be rotated more smoothly together with the guide wheel 8. Further, since the door roller main body 2 of the door roller 3 is elastically urged and protruded downward with respect to the mounting shaft core rod 1, the impact due to the vertical movement of the folding door 4 when the folding door 4 is opened and closed is repulsed by the door roller main body 2. Buffered by force. Further, when the folding door 4 moves up and down during the same cushioning action, the vertical height dimension of the annular recessed step portion 7 is formed to be slightly larger than the vertical height dimension of the guide wheel body 8, so that the guide wheel body 8 is It is difficult to disengage from the ring-shaped recessed step portion 7, and smooth rotation of the door roller main body 2 is ensured.

Further, the folding door door device shown in FIG.
In another embodiment of the present invention, in the folding door door apparatus of the embodiment, the tip end portion of the nail-shaped body 27 that serves as the mounting shaft core rod 1 of the door roller 3 is inserted and fixed in the small recessed hole 6. When nails
The nail-shaped body 27 is firmly fixed so as not to come off by locking the taper-shaped ridge 20 projecting on the outer periphery of the 27 on the inner peripheral surface of the small recess hole 6, The door roller main body 2 of the door roller 3 is rotatably held on the lower end head portion 28 of the 27 through a washer 29. The door roller main body 2 is integrally formed with a small-diameter guide wheel 8 provided on the upper side of the door roller main body 2, and is formed in a two-stage tubular shape that opens vertically. The nail-shaped body 27 is inserted from below the door roller main body 2 and The head portion 28 is locked to the lower end portion of the guide ring 8 via a washer 29. Further, the wheel 12 is accommodated and held in the door roller main body 2 by the door wheel shaft 30 fixed in a erected manner so as to be vertically rotatable in the door roller main body 2.

In the folding door door roller device of the embodiment, the mounting shaft core rod 1 of the door roller 3 is inserted and fixed in the small recess hole 6 formed in the upper surface of the inner bottom of the large recess hole 5, and the mounting shaft core rod is attached. Since the door roller main body 2 provided at the lower end of the door 1 is rotatably provided in the horizontal direction in the same large recessed hole 5, the folding door 4 of the door roller main body 2 is prevented from projecting from the lower end thereof, and the door door main body 2 is prevented from protruding. There is no large gap below. Moreover, the guide ring body 8 provided at the connecting portion of the mounting shaft core rod 1 and the door roller body 2 is provided in the ring-shaped concave step portion 7 formed in the hole edge portion of the small concave hole 6 and having a substantially circular shape in plan view. Since the sliding contact is rotatably fitted, the swinging movement at the time of turning in the large concave hole 5 of the door roller main body 2 is prevented,
The door roller main body 2 rotates smoothly, its running property is good, and it is hard to be consumed or damaged. Further, since the guide wheel body 8 is formed integrally with the door wheel body 2 of the door wheel 3, the door wheel body 2 rotates integrally with the guide wheel body 8 and its swinging movement is reliably prevented.

[0025]

As described above, in the folding door door roller device according to the first aspect of the present invention, the door roller main body, which is horizontally rotatably provided at the lower end of the mounting shaft rod, is housed in the large recessed hole. Therefore, the protrusion of the door roller body from the lower end of the folding door is prevented, a large gap does not occur below the folding door, and the guide wheel provided at the connecting portion between the mounting shaft core rod and the door roller body. Since the body is rotatably fitted in the annular concave step portion that is formed in the hole edge portion of the small recess hole and has a substantially circular shape in plan view, the swing motion during rotation in the large recess hole of the door wheel body is prevented. Therefore, the door roller body rotates smoothly, its running property is good, and it is hard to be consumed and damaged.

Further, in the folding door door apparatus according to claim 2 of the present invention, particularly, since the guide wheel body is fixed to the door wheel body side of the door wheel, the door wheel body is integrally formed with the guide wheel body. The swinging motion is surely prevented.

In the folding door door apparatus according to the third aspect of the present invention, particularly, since the guide wheel body is formed by the bearing, the rotation of the guide wheel body and the door wheel body becomes smoother. Become.

Further, in the folding door door apparatus according to claim 4) of the present invention, in particular, since the door roller body of the door roller is elastically urged and projected downward with respect to the mounting shaft core rod, the folding door is provided. The shock caused by the vertical movement when the vehicle is opened and closed is buffered by the resilience of the door car body.

According to a fifth aspect of the present invention, in the folding door door apparatus, in particular, when the folding door is moved up and down during the cushioning action, the vertical height of the annular concave step portion is set to the guide wheel body. Since the guide wheel is formed larger than the vertical height, it is difficult for the guide wheel to come off the annular concave step portion, and smooth rotation of the door wheel main body is ensured.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a door roller device for a folding door according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing the door roller device of the folding door in different directions.

FIG. 3 is a bottom view showing the door roller device of the folding door.

FIG. 4 is a front view showing the entire folding door in which the door roller device of the folding door is used.

FIG. 5 is a vertical cross-sectional view showing a folding door door apparatus according to another embodiment.

FIG. 6 is a vertical cross-sectional view showing a folding door door apparatus according to a conventional example of the present invention.

FIG. 7 is a schematic plan view showing an operation state of the folding door using the door roller device of the folding door.

FIG. 8 is a vertical cross-sectional view illustrating a conventional improved form.

[Explanation of symbols]

 1 Mounting shaft core rod 2 Door roller main body 3 Door roller 4 Folding door 5 Large concave hole 6 Small concave hole 7 Ring concave stepped portion 8 Guide ring

Claims (5)

[Claims] 1. A door roller main body is provided at a lower end of a mounting shaft core rod so as to be rotatable in a horizontal direction to form a door roller. On the other hand, a door roller main body of the door roller horizontally rotates on a lower end surface near a side end portion of a folding door. A large recessed hole that can be freely accommodated is formed, and a small recessed hole into which the mounting shaft core rod of the door roller is inserted and fixed is formed on the upper surface of the inner bottom of the large recessed hole, and the hole edge portion of the small recessed hole is viewed in plan view. A ring-shaped concave step portion having a substantially circular shape is formed, and a guide wheel body that is rotatably fitted in the ring-shaped concave step portion is provided at a connecting portion between the mounting shaft core rod of the door roller and the door roller main body.
A folding door door device in which the door roller is attached to the lower end near the side edge of the folding door. 2. The door roller device for a folding door according to claim 1, wherein the guide wheel is fixed to the door roller main body side of the door roller. 3. The folding door door apparatus according to claim 1, wherein the guide wheel is formed of a bearing. 4. The door roller device for a folding door according to claim 1, wherein the door roller main body of the door roller is elastically urged and projected downward with respect to the mounting shaft core rod. 5. The door roller device for a folding door according to claim 4, wherein the vertical height dimension of the annular concave step portion is formed larger than the vertical height dimension of the guide wheel.