JPS5821919Y2 - Roll screen hoisting braking device - Google Patents

Description

[Detailed description of the invention] This invention mainly involves the following:
To suppress the rapid rotation of the screen winding cylinder near the end of winding, to enable quiet and smooth winding operation of the screen, and to stop the winding screen at a preset position as necessary. This invention relates to a winding braking device for a roll screen that performs braking.

That is, the gist of this is that there is a stationary bolt arranged and fixed on the rotating shaft of the winding tube of the screen, a stationary bolt that is screwed onto the stationary bolt and can freely move forward and backward in the axial direction of the stationary bolt, and A moving piece connected to a cylinder and rotating according to the winding cylinder, a brake plate mounted on a stationary bolt and pressed against the moving piece, and arranged so as to overlap with the brake plate on the axis of the stationary bolt. The brake plate is constituted by a press-contact member that elastically biases and presses the brake plate in the direction of the moving piece.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, in the present invention, as shown in FIG. The screen S is rotated by the elastic restoring force of the spring R built into the screen S, and a well-known clutch/twisting mechanism is provided for locking the screen S when it is pulled down.

In FIG. 1, a bearing 1 fitted into a winding tube P has a maximum diameter equal to the inner diameter of the winding tube P, and has a shaft hole 2 approximately in the center whose axis is the same as that of the winding tube P. .

One end of a stationary bolt 4 with threaded portions 3 extending from the center in the longitudinal direction to the vicinity of both ends is inserted into the shaft hole 2, and the bearing 1 and the winding tube P are connected to the bolt 4. It is rotatable around the axis.

A part of the circumferential surface of the stationary bolt 4 in the vicinity of the bearing 1 is cut out in a planar shape to form a locking surface 5, and the locking surface 5 is
A brake plate 11 that moves slightly on the axis of the stationary bolt 4 is locked.

The other end of the stationary bolt 4 passes through a shaft support tube 6 fitted to the open end of the winding tube P, and the flat end 7 formed at the tip of the stationary bolt 4 is connected to a connector C with a bracket B. is fixed.

A washer 8 is mounted on the stationary bolt 4 near the bearing 1.

Coaxially with the washer 8, a disc spring, which is a pressure contact body 9 that resiliently biases and presses the brake plate 11, is arranged, which is a disc spring made of a plurality of disc-shaped spring members connected together.

At the end of the press-fitting body 9, a braking plate 11 is formed by cutting out an appropriate number of places on the surface facing the flat end 7 in an abbreviated shape, and forming an engaging part 10 by cutting and raising the notches. , adjacent to
The braking plate 11 is fitted onto the locking surface 5 of the stationary bolt 4, and is pushed against the stationary bolt 4 by the resilient restoring force of the pressure contact body 9.
It is possible to move only slightly elastically in the axial direction.

A movable piece 12 whose side surface is approximately gourd-shaped is screwed onto the threaded portion 3 of the stationary bolt 4, and an end plate 13 of this movable piece 12 formed on the brake plate 11 side is connected to the inner circumferential surface of the winding cylinder P. is closely related to

That is, the moving piece 12 is driven by the winding tube P and the stationary bolt 4
At the same time, the screw rotates around the periphery of the stationary bolt 4, and at the same time, the screw moves in the direction of the brake plate 11 due to the action of the feed screw in combination with the threaded portion 3 of the stationary bolt 4.

Next, another embodiment shown in FIG. 3 will be described.

Its structure is substantially the same as that of the embodiment described above, and the same members are given the same names and symbols, and detailed description thereof will be omitted.

What is different from the previous embodiment is the guide tube 21 fitted between the bearing 1 and the shaft support tube 6. and a movable piece 22 which is fixed to this 21.

The guide tube 21 is fixed at both ends in the longitudinal direction by the bearing 1 on the inner circumferential surface of the shaft support tube 6, and surrounds the threaded portion 3 of the stationary bolt 4, the washer 8, the press member 9, the brake plate 11, and the moving piece 22. It has a pair of guide strips 23 erected at opposing positions on its inner peripheral surface over its entire length in the longitudinal direction.

This guide tube 21 rotates integrally with the winding tube P, the bearing 1, and the shaft support tube 6.

The movable piece 22 has a semicircular guide notch 2 that engages the inner line 23 at the opposing circumferential end of an end plate 24 whose side surface is approximately disc-shaped.
5, and by the engagement between the notch 25 and the guide strip 23, the guide tube 21. That is, it rotates around the stationary pole 14 following the rotation of the winding cylinder P.

As described above, the movable piece 22 is screwed onto the threaded portion 3, so that when the screen S is wound up and the winding tube P is rotated, the moving piece 22 is screwed in the direction of the brake plate 11 by the action of the feed screw.

This effect will be described below.

First, when the lower end of the screen S, which has been pulled down and locked by the clutch/twisting mechanism, is pulled with a finger, the lock is released and the winding tube P rotates due to the elastic restoring force of the spring R, and the screen Winding of S begins.

As the winding tube P rotates, the bearing 1 and the shaft support tube 6 shown in FIG. 1 are driven and rotated.

At the same time, the moving piece 1 stored in close proximity to the winding tube P
2 rotates, and since the flat end 7 of the movable piece 12 is screwed into the threaded part 3 of the stationary bolt 4 fixed to the connector C, the screw to be fed as the moving piece 12 rotates. Due to this action, it spirals in the direction of the brake plate 11.

Therefore, when the screen S is rolled up to a certain extent,
The moving piece 12 spirals and approaches the brake plate 11, and finally collides with the surface of the brake plate 11.

As mentioned above, the brake plate 11 is locked to the stationary bolt 4 and cannot rotate, but the brake plate 11 resists the elastic restoring force of the pressure contact body 9 interposed between it and the washer 8 near the bearing 1. too,
Since the stationary bolt 4 is movable in the axial direction, the brake plate 11 that is pressed against the moving piece 12 that is about to be screwed moves slightly.

At the same time, the brake plate 11 compresses the pressing body 9 by its movement, receives the elastic restoring force of the pressing body 9, presses the movable piece 12, and suppresses its spiral movement and rotation.

Therefore, the rotation of the winding tube P, which is in close contact with the movable top 12 and rotates substantially integrally with the movable top 12, is also suppressed, thereby braking the winding of the screen S.

Furthermore, as described above, a suitable number of portions of the contact surface of the brake plate 11 with the movable piece 12 are notched and raised in the shape of an abbreviated letter.
Since the movable piece 12 is shaped like a biting part 10, the movable piece 12 presses against the biting part 10 without rotating.
0, that is, it is captured by the brake plate 11 and its rotation is suppressed, and the elastic restoring force of the pressure contact body 9 is efficiently transmitted to the movable piece 12 via the brake plate 11, greatly contributing to the braking of the winding cylinder P. It can be done.

In the structure shown in Fig. 3, the rotation of the winding tube P is caused by the bearing 1.
The point transmitted to the moving piece 22 by the guide tube 21 fitted between the shaft supporting tube 6 and the moving piece 22
Its operational feature is that it locks onto the guide line 23 on the inner circumferential surface of the guide tube 21 with its own guide notch 25 and spirals in the direction of the brake plate 11 along this guide line 23. The process until the rotation of the winding tube P is suppressed by the collision between the top 22 and the brake plate 11 is the same as described above, and therefore a detailed description thereof will be omitted.

To place the present invention in the winding cylinder P, move the moving piece 1 in advance.
2.22 is rotated and screwed with fingers or the like, pressed fully against the brake plate 11, and then inserted into the winding cylinder P of the screen S that has been rolled up to the upper end.

As a result, when the screen S that has been pulled down is wound up to its upper end, the movable pieces 12, 22, the brake plate 11.
Braking is performed by the pressure contact body 9 and the like.

At this time, by appropriately selecting the pressing member 9, for example, a disc spring having a specific spring constant, the braking section, that is, the movable pieces 12, 22, and the winding tube P are braked and stopped.
The rotation speed can be freely determined, and this pressure contact body 9
By selecting , it is also possible to select the mode of braking.

The braking section also changes depending on the distance between the movable piece 12.degree. 22 and the braking plate 11 when the screen S is fully pulled down, the pitch of the threaded portion 3 of the stationary bolt 4, etc.

The movable piece 12.22 bites into the brake plate 11 by cutting out and raising an appropriate number of places on the contact surface with the movable piece 12.22 of the brake plate 11 to form the engaging part 10. Since the winding tube P that is in close contact with the moving piece 12, 22 is suppressed from rotating more strongly, the winding tube P that is in close contact with the moving piece 12, 22 is suppressed even more strongly because the winding cylinder P is in close contact with the moving piece 12, 22 and is securely captured.

A guide tube 21 is fitted between the bearing 1 and the shaft support tube 6, and the moving piece 22 is guided through the guide groove 23 provided on the inner peripheral surface of the guide tube 21.
5, the winding tube P and the moving piece 22 are tightly connected when both P and 22 rotate.
The rotational movement of the winding tube P is transmitted to the moving piece 22, and the braking force received by the moving piece 22 is transmitted to the winding tube P, respectively, efficiently.

In addition, since the inner circumferential surface of the winding tube P and the end plate 24 of the moving piece 22 do not come into sliding contact, there is no possibility that the power transmission efficiency will decrease due to wear of the outer circumferential surface of the end plate 24.

Furthermore, the stationary bolt 4, washer 8, disc spring 9, brake plate 11 . By housing the movable piece 22 and the like, the entire body can be substantially integrated into a cylindrical shape and made into a unit, so that attachment/detachment to the winding tube P, replacement, and inspection are easy.

In addition, the present invention can be easily inserted and installed at the end of the conventional winding tube P, and there is no need to replace or partially modify the winding tube P during use. do not have.

゛Therefore, according to the present invention,
The rotating moving piece 12.22 driven by the winding cylinder P spirals in the direction of the brake plate 11 by the action of the feed screw, and after colliding with the brake plate 11, is resiliently biased by the pressure contact body 9. Since the brake plate 11 presses against the movable piece 12.22 and prevents it from rotating or spiraling, the rotation of the winding tube P or the guide tube 21 connected to the movable piece 12.22 is suppressed. Winding up of the screen S can be braked.

As a result, the winding speed increases as the weight of the remaining part of the screen S to be wound decreases near the end of winding.
This increase in speed completely eliminates the inconvenience of the end of the screen S colliding with the already rolled up screen S, the ceiling surface, the bracket B, etc. and damaging the screen S etc.

In addition, the screen S can be rolled up quietly and smoothly without any unpleasant noises caused by such a collision.

In addition, the pressure contact body 9, the movable piece 12, 22 and the brake plate 11
By selecting and changing the interval between the screen S and
Partial light shielding, etc., is possible.

Moving pieces 12, 22, brake plate 11. Since the disc spring 9 and the like can be disposed coaxially with the stationary bolt 4 as the center, there is an advantage that the narrow space at the end of the winding tube P can be effectively used for disposing the disc spring 9 and the like.

In addition, since it has a very simple structure with a small number of components, it is easy to assemble and disassemble for inspection and repair.

As described above, the present invention suppresses the rapid rotation of the screen winding cylinder near the end of winding, mainly when winding up a roll screen, etc., and enables quiet and smooth winding operation of the Sufunone. Accordingly, the screen can be stopped at a preset position, the structure is simple, the desired braking action can be obtained, and mass production is possible. .

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a central vertical cross-sectional view, FIG. 2 is a cross-sectional view of the whole in FIG. 1, and FIG. 3 is a vertical cross-sectional view showing another embodiment. 4 is a YY sectional view of the entire device in FIG. 3, and FIG. 5 is a schematic view of the device in use. 1...Bearing, 2...Shaft hole, 3...
...Threaded part, 4...Stationary bolt, 5...
- Locking surface, 6... Pivot support cylinder, 7... Flat end, 8... Washer, 9... Belleville spring, 10... ... occlusion part, 11 ... brake plate,
12...Moving piece, 13...End plate, 2
1... Guide tube, 22... Moving piece,
23... Guide strip, 24... End plate, 25
...Guide notch, B...Bracket, C
...Connection tool, D...Clutch/twisting mechanism, P...Take-up tube, R...Spring, S...Screen.

Claims (1)

[Scope of utility model registration request] A stationary bolt arranged and fixed on the rotating shaft of the winding tube of the screen, and a stationary bolt screwed onto the stationary bolt that can move forward and backward in the axial direction, and connected to the winding tube and attached to the winding tube. A moving piece that rotates as a result of rotation, a brake plate that is mounted on a stationary bolt and presses against the moving piece, and a brake plate that is arranged so as to overlap the brake plate on the axis of the stationary bolt, and that moves the brake plate in the direction of the moving piece. A winding braking device for a roll screen, characterized in that it is comprised of a pressing body elastically biased and pressed into contact with the roll screen.