JPS6140864Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device that can freely adjust the backward biasing force of a sliding door that is designed to self-close using the restoring force of a known constant force spring (hereinafter referred to as a constant force spring).

Conventionally, when a sliding door is equipped with a self-closing device, the accelerating force accumulates as it approaches full closure, and if there is no shock absorber, it will collide with the side pillars, causing unexpected damage to people and property passing around the sliding door and pillars. Therefore, the acceleration force was adjusted using a shock absorber or a governor using electricity, hydraulic pressure, pneumatics, etc., but the installation cost increased due to the troublesome daily maintenance and complicated mechanism. This resulted in a high burden on the operator, making it unsuitable for simple sliding doors that can be opened with bare hands.

In addition, there are some sliding doors that attempt to close themselves simply by using the restoring force of the bullet, but since there is no shock absorber, the rapid biasing speed when closing poses a risk of collision.

Therefore, for simple sliding doors that are often used as partitions in homes, factories, and offices, it is small, lightweight, and inexpensive, and can be automatically closed, and with a shock absorbing device, can be installed at any time, regardless of whether it is an existing or new installation. There was a demand for the development of an ultra-compact self-closed speed governor.

This idea was devised to solve the above-mentioned difficulties and meet the development demands mentioned above, and does not rely on energy such as electricity, hydraulics, or pneumatics, which can cause unexpected failures, and exclusively uses the characteristics of known constant force springs. Take advantage of
When manually opening the door, the door can be opened with a constant force while accumulating the restoring force of the constant force spring, while when closing the door, it is automatically and safely closed with speed regulation. The purpose is to obtain a speed governor.

Examples will be described below with reference to the drawings.
As shown in the first diagram, inside the box A with the lid C opened, a small gear 10 meshing with the large gear 3 on the upper flange of the winding drum and a sub reel 6 around which a constant force spring B is wound are arranged.
The structure of the lower part is shown in detail in the second diagram, which is a sectional view taken along the center line XX, and shows that on the left and right sides of the bottom of the box A there are shaft cylinders 7 and 8 that come into contact with the lid C, and in the middle there is a boss part 9B. A shaft cylinder 9 is provided upright, which protrudes outside A and has a three-stage hole in which both ends of the hole are circular and the middle part is a polygonal column shape. A drum-shaped winding drum 1 with a small gear 2 on the lower flange and a large gear 3 on the upper flange is rotatably fitted onto the shaft tube 7, and a wire 20 with one end attached to the upper side member of the sliding door D is attached. It is concentrated in the narrow diameter part at the center along the drum-shaped body of the winding drum 1, and is devised so that rotation of the winding drum is not hindered by excessive deviation, and its tip is connected to the large gear and the body. It is inserted into the corner hole where it touches and is tied down. The auxiliary reel 6 has both flanges on the shaft cylinder 8.
is rotatably fitted on the outside, and a known constant force spring B is wound around the body of the spring B in a state in which one end is not fixed and is wound naturally in many layers to a length that is sufficiently larger than the travel distance of the sliding door D. , since the other end is stretched and wound upside down and fixed to the body of the main reel (described later), the constant force spring is attached to the winding rack (the third
Figure)

Next, on the shaft cylinder 9, a large gear 4 that meshes with the small gear 2 of the winding drum 1 is formed on the lower flange, and a flange is formed on the other side at a position equal to the spacing between the flange of the sub reel 6. The reel 5 is rotatably fitted on the outside, and the end of the constant force spring B, which is turned over from the side of the sub-reel 6 and stretched in an S-shape, is fixed to the flat part cut into the body diameter part (as shown in the third figure).
Another small gear 10 that meshes with the large gear 3 of the winding drum 1 is rotatably fitted into the circular hole above the shaft cylinder 9, and its upper surface 10B
A base shaft 10A having a threaded portion on the lower side is vertically disposed so that the base shaft 10A can come into pressure contact with the lid C to perform a braking role, and another polygonal nut 11 is screwed into the threaded portion, and A crown stopper 10C is fixed to the end of the barrel 9 as shown in FIG.
A speed regulating mechanism G, which is essential to this invention, is provided, in which a bullet 12 is interposed between the bottom recess and the horizontal bearing 13.

In other words, the inside of the shaft cylinder 9 has a three-stage shape as shown in the fourth diagram, in which the upper L1 part is circular and the small gear 10 for braking is rotatably fitted therein, and the lower L2 part is circular. The part is also circular, the same as the L1 part, and is the part where the nut 11 idles, and the middle part S of the upper and lower circular holes is formed into a similar polygonal hole 9A that is slightly larger than the outer contour of the nut 11, and the lower circular part L2
A slope 9C is cut at the boundary with the hole so that the nut 11 can be smoothly inserted into the nut 11 when rotating. Another cap body 14 is attached to the boss portion 9B protruding from the bottom surface of the box A so that it can move forward and backward by using a screwdriver from the outside using a plurality of screws 15, 15, and is attached to the boss portion 9B protruding from the bottom surface of the box A. The bullet 12 placed on the shaft presses the horizontal bearing 13 in contact with the nut 11 so that when the base shaft 10A of the small gear 10 rotates, the nut smoothly fits into and rises from the slope 9C of the polygonal hole 9A. The cap body 1
The pressing force of the ammunition 12 can be changed arbitrarily by adjusting the screws 15 of 4.

This invention has the above-mentioned structure, and the operational state of each part during use is as follows.

(When opening) Sliding door D is pushed by hand (manual horizontal pull) to the fifth position.
When moving forward in the opening direction as shown in the figure, the sliding door D
The wire 20, one end of which is fixed to a cable stop installed on the upper side member, is unwound (unwound) from the winding drum 1 in the box A, which has been wound in advance for a longer distance than the traveling distance of the sliding door. As the winding drum 1 starts rotating in the indexing direction (leftward direction) of the wire 20, the small gear 2 formed on the lower flange of the winding drum 1 engages with the main reel 5.
The large gear 4 on the side rotates clockwise while decelerating, and at the same time, the constant force spring B, which is extended in an S-shape from the side of the sub-reel 6 whose one end is fixed to the flat part of the body diameter of the main reel 5, is naturally wound. From this state, it is wound onto the main reel 5 side and the restoring force is built up to move the sliding door backward (closed).On the other hand, the speed regulating mechanism meshes with the large gear 3 formed on the upper flange of the winding drum 1. Small gear 1 in G
0 is a state in which slight pressure is applied to the lid C side between the brim surface of the main reel 5 and the lid C (the strength of the pressure contact depends on the cap body 14).
(can be adjusted by advancing and retreating), the nut 11 screwed onto the base shaft 10A vertically installed on the small gear 10 starts to rotate at an increased speed. Since it is pressed by the bullet 12, it easily slides into the polygonal columnar hole 9A with the help of the guidance of the slope 9C, and the small gear 10
While the nut is rotating, that is, while the door opening movement continues, the nut, which is polygonal, will move rapidly within the polygonal columnar hole 9A due to the principle of thread pairing between the base thread and the polygonal columnar hole. Since the pressure contact by the lower bullet 12 suddenly disappears, the small gear 10 continues to idle without being in pressure contact with the lid C. Therefore, the large gear 3 and small gear 2 on the winding drum side The load from the pinion does not affect the rotation of the main reel 5.
Since it rotates extremely smoothly and a constant load spring can be wound from the sub-reel side, the door opens easily with a constant tensile load maintained regardless of the traveling distance due to the characteristics of the constant force spring. It progresses to

(When the door is closed) Next, if the manual operation for opening the sliding door is stopped, or if it is locked (not shown) and stopped when it is fully opened, the index of the wire 20 is also stopped, and at the same time, the index between the winding drum and the main reel is stopped. The deceleration rotation between the gears at the bottom and the speed-up rotation occurring between the gears at the top stop all at once. In such a case, until then, the auxiliary reel 6 is wound onto the main reel 5 side to store the corresponding return force to its original shape. The constant force spring B immediately starts urging the original sub reel 6 side to return to its original shape (rewinding), and the door closing action begins. Therefore, since the main reel 5 changes to reverse rotation, the lower gear transmission is also reversed and the winding drum is rotated at an increased speed, causing the sliding door to rapidly start its closing movement, but on the other hand, above the winding drum, The large gear increases the speed of the small gear and rotates it to the left (the opposite when opening the door).
Nut 11 screwed onto the base shaft of this small gear
As in the case when the door is opened, the projector 12 rapidly descends inside the polygonal columnar hole 9A of the shaft cylinder 9 according to the principle of pairing screws and comes into contact with the horizontal bearing 13, and then gradually pressurizes the projectile 12 from the polygonal columnar hole. As it descends into the circular hole of the L2 part which escapes and becomes idling, at this point the degree of pressurization of the bullet by the nut reaches its maximum, and the restoring force of the bullet 12 causes the nut, the base shaft, and the small gear 10 to The upper surface 10B of the small gear strongly presses against the lid C and generates a frictional force, so the closing speed of the sliding door D is damped by braking as it approaches fully closed, and the sudden side Collision with pillars can be reliably avoided even when the door is fully closed, so the door can be closed extremely safely.

When implementing the sliding door, there is a difference in the weight of the sliding door (metal and wooden), and it is necessary to increase or decrease the above frictional force. Since the pressure applied to the bullet can be easily changed by tightening and loosening as appropriate, the degree of pressure contact between the small gear 10 and the lid C can be arbitrarily changed as described above, so that the closing and retracting speed of the sliding door can be appropriately buffered. It is convenient because it can be done.

Therefore, the actions of each component when the sliding door opens and closes are briefly as follows.

(a) Open door (manual) → Speed up pinion gear rotation (right) → Nut enters polygonal columnar hole and rises → Pinion cover and no load → Constant load spring deceleration winding → Open with constant force (b) Close door (automatic) ) → Increased speed of pinion (left) rotation → Lowering of the nut polygonal columnar hole → Accumulated pressurization of the nut's bullet → Pressure contact with the pinion cover to generate frictional force → Buffering the returning biasing force of the constant force spring → Deceleration closing. When the sliding door is opened, there is no load from the gear mechanism, and the load is simply from winding up the constant force spring. Due to the characteristics of the spring, the force is always constant no matter how far the sliding door is moved forward, so it opens easily and smoothly. A door is made.

On the other hand, when closing the door, the return biasing force of the constant force spring (quick return movement) is buffered by the frictional force created by the pressure contact between the small gear and the lid, which gradually pressurizes the bullet, so the door can be closed safely. will be held.

The self-closing door speed control device invented by this invention opens the door under a constant load by manual operation when opening, and as soon as the opening operation (hand push) is stopped, the sliding door closes automatically and silently while controlling the speed. Therefore, it is extremely safe, and since the energy source for self-closing is the simplest but unique ammunition, it is less expensive than conventional complex devices in terms of failure, manufacturing, handling cost, volume, etc. It has extremely high practicality because it is highly effective in determining the accuracy.

[Brief explanation of the drawing]

Fig. 1 is a front view of the product with the lid opened, Fig. 2 is an end view taken along line X-X of the same as above, Fig. 3 is a partially cutaway cross-sectional view showing the state of the bullet rack, and Fig. 4 is a main view of the product. Fig. 5 is an overall view showing the installed state of the proposed product, and Fig. 6 is a diagram showing the relative relationship between the bullet and the frictional force. 1... Winding drum, 2... Small gear, 3... Large gear, 4
...Large gear, 5...Main reel, 6...Sub-reel,
7, 8, 9...Shaft cylinder, 9A...Polygonal columnar hole, 10
...Small gear, 10A...base shaft, 11...nut,
12... Bullet, 14... Cap body, 15... Screw,
20...Wire, D...Sliding door, B...Constant force spring.

Claims (1)

[Scope of utility model registration request] Wire 2 with one end attached to the upper side member of sliding door D
A drum-shaped winding drum 1 that rotates at an index of 0, and another large gear 4 that meshes with a small gear 2 formed on the lower flange of this winding drum.
A main reel 5 with a lower flange shaped as a spring, and an auxiliary reel 6 on which the winding end of another constant force spring B is fixed in an S-shape are installed upright on the bottom side of the box A. A small gear 10 is rotatably fitted onto each of the shaft cylinders 7, 8, and 9 and meshes with a large gear 3 formed on the upper flange of the winding drum 1, and a base shaft vertically attached to the small gear. A horizontal bearing 13 that is screwed into the shaft bearing 10A and comes into contact with the nut 11 that moves up and down inside the polygonal columnar hole 9a of the shaft tube 9.
A speed governor for a self-closing door, characterized in that a bullet 12 inside a cap body 14 which can be moved forward and backward from the outside of the box A by a screw 15 is pressed into contact.