JPH0436381Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a closer for automatically closing a sliding door.

[Conventional technology]

Conventionally, in the above-mentioned closer, the drive belt type, in which one end of the drive belt is fixedly wound around the outer periphery of the drum, which is equipped with a mainspring spring that stores the sliding door closing force in the rotating direction, has been proposed by the applicant. Kimiaki
This is known from, for example, what is disclosed in Japanese Patent No. 57-7737.

The above conventional example is effective in that it can automatically close both the left and right sliding doors with a single closer, but the structure is such that the braking part and the driving part are supported on a fixed shaft fixed to the sliding door. However, there is a problem in that it cannot be used for large and heavy sliding doors, which limits its range of use.

[Problem that the invention attempts to solve]

In this invention, a hydraulic braking part is interposed in the housing to support a rotary shaft so that the rotation can be braked, and a drum is fixed to the rotary shaft, and the drum is separated from the drum with a built-in mainspring spring for accumulating force for closing the door. By fixedly winding one end of each of the drive belt and the driven belt in opposite directions and extending the other ends symmetrically, the drive belt and the driven belt, which are fixed so as to be able to mutually adjust their positions in the circumferential direction, are attached to a pulley provided on the sliding door. The purpose is to make it possible to easily adjust the door closing force according to the size, etc., and also to enable smooth door closing operation.

[Means for solving problems]

That is, in the present invention, a housing formed to be fixed to a sliding door supports a rotating shaft so that rotation can be braked by interposing a hydraulic brake part, a drum is fixed to the rotating shaft, and a door opening operation is performed on the drum. A mainspring spring is installed inside the drum so that the force for closing the sliding door in the rotating direction can be stored, and a pulley provided separately from this spring is fixed to the drum using mounting screws so that the position can be mutually adjusted in the circumferential direction. , one end of a driving belt and a driven belt are fixedly wound around the pulley in opposite directions, and the other ends of each belt extend symmetrically, the other end of the driving belt is fixed to the upper frame of the sliding door mounting frame, and The other end of the driven belt is fixed to the upper frame via a tension spring, thereby solving the above problem.

〔Example〕

Embodiments of the present invention will be described below in detail based on the drawings. As shown in FIGS. 1 to 10, the housing 1 is attached to the upper part of the sliding door 2 via the mounting plate 2 with mounting screws 4... The housing 1 is formed to be removably fixed, and a rotary shaft 6 is supported on the housing 1 through a brake part 5 so that rotation thereof is braked.

Here, the brake section 5 is formed as follows.

A cap 10 is installed horizontally in the housing 1 with its front end opened, and its front end opening is fixed to the housing 1 through an O-ring 8 with mounting screws 9.
A piston 12 is attached to the cylinder 11, which is formed by closing the piston 12, and a pin 13 protruding toward the center from the wall of the cylinder 11 is fitted into a groove 12a that is recessed in the axial direction on the outer periphery of the piston 12. The piston 12 is fitted so as to be slidable only in the axial direction while being prevented from rotating in the axial direction.
The piston 1 is screwed into the threaded portion 6a of the piston 1.
Front chamber 11a and rear chamber 11 formed before and after 2
b is filled with hydraulic oil.

The piston 12 also has two oil holes 14 that communicate with the front chamber 11a and the rear chamber 11b.
A, 15a are provided with two hydraulic valves 14, 15 that operate in opposite directions.

Each of the hydraulic valves 14, 15 has oil passage holes 14a, 1
Steel balls 14c,
Springs 14f and 15 allow 15c to sit resiliently.
f, and the other ends of the springs 14f, 15f are connected to the threaded holes 14d, 14d,
Adjustment screws 14e and 15e with holes screwed into 15d
It is supported and formed.

Further, three speed regulating valves 16', 16'', and 16 are provided on the peripheral wall of the cylinder 11.

Each of the speed regulating valves 16' to 16 is formed by screwing a valve rod 16b into each oil passage 16a, which is located on the circumferential wall of the cylinder 11 and communicates with the piston front chamber 11a and the piston rear chamber 11b. The door closing speed is adjusted by arbitrarily adjusting the amount of oil flowing through each oil passage 16a using the valve rod 16b.

Here, the three speed regulating valves 16' to 16 are
The opening positions of the respective oil passages 16a in the cylinder 11 are set to differ by a desired size in the axial direction, so that the door closing speed can be adjusted in stages.

Further, the rotating shaft 6 is supported by bearings 7 and 18 fitted into the housing 1 and the cap 10, respectively, and one end thereof is connected to the cylindrical portion 10a of the cap 10.
An oil seal 39 is fitted inside and projects forward, and a spacer 19 is externally mounted on the projecting portion with a bearing 20 interposed therebetween.

In other words, uneven portions 19a and 10b are provided on the distal end of the cylindrical portion 10a and the opposing surface of the spacer 19 so as to engage with each other.

The tip of the rotary shaft 6 protruding forward from the spacer 19 is formed into a square shaft portion 6b, and a square hole 21b is formed through the center of the boss portion 21a of the drum 21.
After fitting, a screw 23 is screwed onto the square shaft portion 6b via a washer 22 to fix the drum 21.

The drive section 17 of the sliding door 3 is formed separately from the above-mentioned brake section 5 as follows.

The drum 21 has a front wall 21c with the boss 21a in the center and a peripheral wall 21d, and has a substantially U-shaped vertical section. A mainspring spring 25 capable of accumulating force is installed inside the drum 21, and a pulley 42 is formed separately on the outer periphery of the drum 21 and has two grooves 42a and 42b around the outer periphery.
After that, the outer flange 21e provided around the inner end of the peripheral wall 21d of the drum 21 and the pulley 42 are connected with a plurality of pulleys 42 (see FIG. 1) with the washer 44 interposed. In the illustrated example, it is fixed with two screws 43.

That is, the outward flange 21e is provided with a plurality of holes 21g at regular intervals in the circumferential direction, while the side surface of the pulley 42 is provided with a plurality of holes 21g in number and at intervals corresponding to the holes 21g. A number of screw holes 42c are provided, and the pulley 42 is fixed by hand in a state where it is fitted to the drum 21.
1 in the direction of arrow ○a in Fig. 2 to give an initial twist to the mainspring spring 25 (applying the load for installing the piston 12), and adjust the closing force as desired.
Screw 4 from the hole 21g of the outward flange 21e
3 is inserted into the screw hole 42C of the pulley 42, thereby fixing the drum 21 and the pulley 42.

The inner end 25a of the mainspring spring 25 is fixed to the notch 19b of the spacer 19 with a screw 26, as shown in FIG. 8, and the outer end 25b is fixed to the peripheral wall 21d of the drum 21. It is fixed by being hooked to the opening edge of the notch 21f.

Further, in each groove 42a, 42b of the pulley 42, one end of each of the driving belt 27 and the driven belt 28 is fixed directly to the pulley 42, or an adhesive is applied to the fixing plate 29 as shown in FIGS. 7 and 8. After fixing the drive belt 27 with
The other end is fixed to the upper frame 30a of the sliding door mounting frame 30,
On the other hand, the other end of the driven belt 28 is fixed to the upper frame 30a with a tension spring 31 interposed therebetween.

Here, the other ends of the belts 27 and 28 are provided with two square holes 32a provided in each fixing metal fitting 32, as shown in FIGS. , 32b, fold it back, insert the folded part into both the fixing metal fittings 32, 33, and fix it with the mounting screws 34, 34. The fixing fitting 36 is fixed to the upper frame 30a with screws 35, and on the other hand,
In the case of the driven belt 28, the above-mentioned fixing metal fittings 32
and the other fixing fitting 36 with the spring 31,
The fixing fittings 36 are connected to the upper frame 30 by a limiting pin 37 that serves to limit the amount of tension of the tension spring 31.
It is fixed to a with screws 35.

Here, the driven belt 28 and the tension spring 31 are
It is provided to ensure smooth door closing operation.

In addition, in FIGS. 2 and 3, 40, 40 are door rollers attached to the upper part of the sliding door 3, and are engaged and guided by rails 41, 41 attached to the upper frame 30a of the sliding door mounting frame 30.

In the above configuration, when the sliding door 3 is opened in the direction of arrow a in FIG. is drawn in and the closing force in the opposite direction of arrow ○a is accumulated.

At this time, the driven belt 28 is wound around the pulley 42, and the rotation of the rotating shaft 6 causes the piston 12 to move in the direction of arrow A in FIG. When the piston 12 moves in the direction of arrow ○a, the front chamber 11
The hydraulic oil a passes through the oil passage hole 14a of one of the hydraulic valves 14, opens the steel ball 14c against the spring force, and flows into the piston rear chamber 11b.

Note that at this time, the other hydraulic valve 15 is closed.

When the sliding door 3 is released in the closed state, the drum 21 and the pulley 42 rotate in the opposite direction of arrow ○A due to the closing force stored in the mainspring spring 25, and while winding up the drive belt 27, Driven belt 28
The sliding door 3 closes while rewinding. At this time, the piston 12 moves in the opposite direction of arrow ○A, and the hydraulic oil in the piston rear chamber 11b passes through each oil passage 16a of each speed adjustment valve 16' to 16, so each speed adjustment concerned By arbitrarily adjusting the appropriate amount of oil for the valves 16' to 16, the closing speed can be adjusted as desired. In other words, when the door is closed, the speed regulating valves 16', 16'', 16
If the door closing speed adjusted by is different, the door closing speed at the time of changing the oil passage, that is, the speed change and the rotation speed of the drum 21 will be different, causing slack in the drive belt 27 or the driven belt 28, and the sliding door will temporarily stop. The door may be closed again after the vehicle has stopped, or the door may be closed without braking without changing the speed.

Therefore, the tension spring 31 of the present invention absorbs the reaction at this time by elongation, and smoothly performs the door closing operation.

[Effect of idea]

As explained above, since the sliding door closer according to the present invention is configured, the housing 1 supports the rotating shaft 6 for fixing the drum with the braking part 5 interposed.
Since it is fixed to the sliding door 3 with the brake part 5 on the sliding door 3 side, it can not only be used for large sliding doors, but also can be easily assembled to the sliding door 3. 21 and pulley 42
are formed separately so that the positions of the pulleys 42 can be adjusted relative to each other in the circumferential direction.
2 by hand, rotate the drum 21 in a predetermined direction to give an initial twist to the mainspring spring 25, and when the predetermined closing force is obtained, the drum 21 and pulley 42
By fixing with screws, the desired closing force can be easily adjusted according to the size, weight, etc. of the sliding door 3, and the speed control valves 16', 16'', Since the reaction of the door caused by the difference in adjustment between the door openings 16 and 16 is absorbed by the extension of the tension spring 31, there is a remarkable effect that stable door closing operation can be performed.

[Brief explanation of drawings]

FIG. 1 is a vertical side view showing an embodiment of the sliding door closer according to the present invention, FIG. 2 is a front view showing the usage state of the same embodiment, and FIG. 3 is a vertical side view taken in the direction of the - line in FIG. FIG. 4 is a longitudinal sectional side view of the piston in the same embodiment, FIGS. 5 and 6 are cross-sectional views taken along the - line and - line in FIG. FIG. 8 is a plan view showing an example of fixing the belt; FIG. 8 is a half-cross-sectional view showing an example of fixing the mainspring in the same embodiment;
10A and 10B are a plan view and a side view, respectively, showing an example of fixing the driving belt and the driven belt in the same embodiment. 1... Housing, 3... Sliding door, 5... Braking part, 6... Rotating shaft, 21... Drum, 25... Spring spring, 27... Drive belt, 28... Driven belt, 30... Sliding door installation Frame, 30a...Top frame,
31... tension spring, 42... pulley, 43...
Mounting screw.

Claims (1)

[Scope of utility model registration request] A housing 1 formed to be fixed to the sliding door 3 supports a rotating shaft 6 so as to be able to brake its rotation via a hydraulic braking unit 5, and a drum 21 is fixed to the rotating shaft. A mainspring spring 25 is installed inside the drum so that it can store the sliding door closing force in the rotating direction when operated, and a pulley 42 provided separately from the mainspring spring 25 is attached to the drum with mounting screws 43 so that the position can be adjusted mutually in the circumferential direction. ..., one end of each of the drive belt 27 and the driven belt 28 is fixedly wound around the pulley in opposite directions, the other ends of each are extended symmetrically, and the other end of the drive belt is fixed to the sliding door mounting frame. 30 is fixed to the upper frame 30a, while the other end of the driven belt is connected to the tension spring 31.
A sliding door closer that is fixed to the upper frame through.