JP3681491B2 - Sliding door closer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sliding door closer used for a semi-automatic sliding door.
[0002]
[Prior art]
As is well known, a semi-automatic sliding door is a mechanism that automatically closes a door that has been opened by hand. The sliding door closer that is the closing mechanism is roughly divided into a gravity type and a spring type, and a spring type is advantageous from the viewpoint of the scale of the apparatus.
[0003]
In the spring-type sliding door closer, the door is opened against the pulling force of the coil spring, and when the hand is released, the door is automatically closed by the pulling force of the coil spring. In order to suppress the speed when the door is closed, an air cylinder type damper is usually combined with a coil spring.
[0004]
[Problems to be solved by the invention]
By the way, as a recent trend, the frontage is widened, and accordingly, a large opening / closing stroke is required for the sliding door closer. However, since the conventional spring-type closer cannot be adjusted in length corresponding to the width of the space in which the sliding door is provided, it is necessary to newly manufacture a long one. Also, existing ones have to be prepared in many lengths for each model. For this reason, it has been unavoidable that the production cost increases.
[0005]
In addition, since this type of closer is exposed to the outside, design properties are required. The conventional one cannot be said to have sufficient design properties, such as the damper housed in the case being visible from outside the case.
[0006]
The present invention was devised in view of such circumstances, and an object thereof is to provide a sliding door closer that is easy to secure a large opening / closing stroke and that is adjustable in length and that is low in cost and excellent in design. And
[0007]
[Means for Solving the Problems]
The sliding door closer according to the present invention is a sliding door closer that automatically closes the sliding door, and is housed in a cylindrical outer case in which a slit is formed in the longitudinal direction, and the cylinder portion is movable in the longitudinal direction. In addition, the piston rod part protrudes from the cylinder part to the case one end side, the connecting pin at the tip of the piston rod part is connected to the sliding door through the slit, and the piston rod part of the damper to the other end side of the case A first spring that elastically pulls; a second spring that elastically pulls the cylinder portion of the damper toward the other end of the case, and has a tensile force greater than that of the first spring; As a spring, one end is connected to the tip of the piston rod part of the damper, and the intermediate part is located on the base end side of the damper in the other end of the outer case Vignetting was via the relay unit is characterized by having a coil spring the other end is connected to one end of the outer case.
[0008]
In the sliding door closer according to the present invention, as the first spring, in addition to the coil spring, it penetrates through the inside of the hollow piston rod portion, one end portion is at the tip portion of the piston rod portion, and the other end portion is at the base portion of the cylinder portion. An interpolated sub-coil spring connected can be provided.
[0009]
Moreover, the intermediate part of the coil spring engaged with the relay part in an outer case can be used as a string.
[0010]
In addition, a reel mechanism that uses one end of the coil spring as a string and winds the string and is rotated from the outside of the case through the slit of the outer case can be attached to the tip of the piston rod part of the damper.
[0011]
In addition, a connecting pin that extends from the tip of the piston rod portion of the damper through the slit of the outer case to the outside of the case for connection with the sliding door can be a detachable insertion type.
[0012]
In addition, a damper stopper is provided between the damper and the relay portion and provided in the other end portion of the outer case, and the other end portion of the second spring is connected to the outer case. It is configured to be selectively screwed to a plurality of positions in the longitudinal direction.
[0013]
In the sliding door closer according to the present invention, the cylinder portion and the piston rod portion of the damper in the outer case can move in the case longitudinal direction. When the sliding door is opened, the piston rod part is pulled out from the cylinder part against the pulling force of the first spring and moves in the opening direction of the sliding door.
[0014]
At this time, the coil spring as the first spring is disposed from the tip portion of the piston rod portion to one end portion of the outer case via the relay portion provided in the other end portion of the outer case, and a long spring length is ensured. Therefore, the sliding door opens smoothly to the stroke end of the piston rod part.
[0015]
When the piston rod part reaches the stroke end, the cylinder part moves in the door opening direction against the pulling force of the second spring. Thereby, a large opening / closing stroke is ensured, and the external case can be extended. The length is adjusted by cutting off one end of the long outer case. If the outer case is short, only the first spring is used. Since the damper is housed in the outer case, it cannot be seen from the outside.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a partially broken perspective view of a sliding door closer according to an embodiment of the present invention, FIG. 2 is a partially broken perspective view for explaining an internal structure of a damper of the sliding door closer, and FIG. 3 is a piston of the sliding door closer. It is a vertical side view for demonstrating the structure of the front-end | tip part of a rod part.
[0017]
As shown in FIG. 1, the sliding door closer according to the embodiment of the present invention automatically closes the rectangular cylindrical outer case 10, the air cylinder type damper 20 housed in the outer case 10, and the sliding door. The first spring 30 and the second spring 40 housed in the outer case 10 together with the damper 20, the damper stopper 70 provided in the outer case 10 located on the base end side of the damper 20, and the damper stopper 70 Furthermore, the relay roller 60 provided in the outer case 10 is provided in the base end side. The damper is not necessarily limited to the air cylinder, and an oil damper or the like may be used.
[0018]
The outer case 10 includes a case main body 11 made of a square pipe made of extruded material of resin such as polyvinyl chloride or aluminum, and mounting brackets 12 and 12 attached to both ends of the case main body 11. A slit 13 is provided on the lower surface of the case body 11 from the center to one end. Further, in order to attach the damper stopper 70, a plurality of openings 14 are provided at intervals in the longitudinal direction of the lower surface of the case body 11. On the other hand, the upper surface of the case body 11 is provided with an opening (not shown) for dropping a connecting pin described later. The length of the case main body 11 can be adapted to a recent wide frontage.
[0019]
The mounting brackets 12 and 12 are detachably inserted into both end portions of the case main body 11, and the screwing portions 16 and 16 can be directed to either side by being directed in an arbitrary direction at the time of insertion. In addition, ceiling mounting is also possible by turning the screwing portions 16 and 16 upward.
[0020]
The cylinder portion 21 of the damper 20 is accommodated in the case body 11 on the other end side of the slit 13 so as to be movable in the longitudinal direction. The piston rod part 22 protrudes from the cylinder part 21 to one end side, and a block-like movable hook 23 is attached to the tip part for connection with a lower sliding door.
[0021]
The movable hook 23 has a connecting pin 24 perpendicular to the tip. The connecting pin 24 projects from the lower portion of the case body 11 through the slit 13 and engages with a hook attached to the sliding door, thereby connecting the piston rod portion 22 to the sliding door. As shown in FIG. 3, the connecting pin 24 is dropped from above into a vertical through-hole 25 provided in the movable hook 23 and set on the movable hook 23. For this drop, when the movable hook 23 is in the initial position, the through hole 25 is positioned below the opening provided in the upper surface of the case body 11.
[0022]
The movable hook 23 is provided with a reel mechanism 50 together with the connecting pin 24, which will be described in detail later.
[0023]
The first spring 30 includes a coil spring 31 (hereinafter, this coil spring is referred to as a main coil spring) located outside the damper 20 and a secondary coil spring 32 that penetrates the hollow piston rod portion 22 as shown in FIG. One end of the secondary coil spring 32 is connected to a cap 26 attached to one end of the piston rod portion 22, and the other end is connected to an end cap 27 of the cylinder portion 21. For this reason, the piston rod portion 22 is elastically pulled toward the proximal end side by the auxiliary coil spring 32.
[0024]
Reference numeral 28 denotes a speed adjusting screw provided on the end cap 27 of the cylinder portion 21, and 29 denotes a piston. The speed adjusting screw 28 is positioned inside an opening provided in the rear end portion of the cylinder portion 21 in a state where the end cap 27 is attached to the rear end portion of the cylinder portion 21. Then, the speed when the sliding door is closed is arbitrarily adjusted by operating the speed adjusting screw 28 with a screwdriver or the like through the opening.
[0025]
On the other hand, as shown in FIG. 1, the main coil spring 31 is stretched in a U shape extending from the movable hook 23 to one end portion of the case main body 11 via the relay roller 60. Here, the relay roller 60 is rotatably attached to a shaft 61 erected on the bottom plate portion of the case body 11.
[0026]
The main coil spring 31 has one end portion and an intermediate portion constituted by string members 33 and 34. In other words, the main coil spring 31 has a configuration in which two coil springs are connected by the string body 34 and the string body 33 is connected to the tip of one coil spring. The string 33 located at one end is coupled to the reel mechanism 50 provided on the movable hook 23. The string 34 located at the intermediate portion is hung on a relay roller 60 provided in the other end of the case main body 11, and the other end of the main coil spring 31 is connected to one end of the case main body 11. The piston rod portion 22 is elastically pulled toward the proximal end side by the U-shaped main coil spring 31 and the sub-coil spring 32 described above.
[0027]
The second spring 40 is formed of a coil spring similar to the first spring 30, and one end thereof is connected to the tip end portion (top cap) of the cylinder portion 21. The other end of the second spring 40 is connected to a damper stopper 70 provided in the other end of the case body 11. Accordingly, the cylinder portion 21 is elastically pulled toward the proximal end side by the second spring 40. The pulling force is set to be larger than the force by which the first spring 30 (the main coil spring 31 and the sub coil spring 32) pulls the piston rod portion 22.
[0028]
As shown in FIG. 3, the reel mechanism 50 mounted on the movable hook 23 includes a horizontal roller 51 and a shaft 52 extending downward from the roller 51. The roller 51 is accommodated in a recess 231 provided on the upper surface of the movable hook 23, and a string 33 provided on one end of the main coil spring 31 is wound around the roller 51. A plurality of protrusions 53 are provided on the lower surface of the roller 51 at intervals in the circumferential direction, and a plurality of depressions into which the protrusions 53 are fitted are formed on the bottom surface of the recess 231 facing the lower surface. . The shaft 52 passes through the movable hook 23 and is biased downward by a spring 54, thereby preventing the roller 51 from rotating. The shaft 52 has a groove 521 that faces the outside of the outer case 10 through the slit 13 of the case body 11 and for inserting a driver on the lower surface thereof.
[0029]
The damper stopper 70 is fixed in the case body 11 by screwing a screw 71 through one of the plurality of openings 14 provided on the bottom surface of the case body 11. And the fixed position of the damper stopper 70 is adjusted by selectively using the plurality of openings 14.
[0030]
Next, the usage method and function of the sliding door closer which concerns on embodiment of this invention are demonstrated.
[0031]
First, the outer case 10 is assembled. Since the length of the case main body 11 can be adapted to the wide frontage recently, by cutting one end of the case main body 11 in accordance with the width of the space to which the sliding door is attached, if necessary before assembly. Set. Mounting brackets 12 and 12 are attached to both ends of the case body 11.
[0032]
As described above, the orientation of the screwing portions 16 and 16 can be changed by directing the mounting brackets 12 and 12 in an arbitrary direction when inserted into the outer case 10. After these, the outer case 10 is attached along the upper side of the space for attaching the sliding door, and is connected to the sliding door via a hook.
[0033]
When the sliding door cannot be opened, the cylinder portion 21 of the damper 20 is pulled by the second spring 40 and elastically contacts the damper stopper 70. Further, the piston rod portion 22 is pulled into the cylinder portion 21 by being pulled by the first spring 30 (the main coil spring 31 and the sub coil spring 32).
[0034]
When the sliding door is opened, first, the piston rod portion 22 of the damper 20 is pulled out from the cylinder portion 21 toward the tip side against the pulling force of the first spring 30 (the main coil spring 31 and the sub coil spring 32). This is because the pulling force of the first spring 30 is smaller than the pulling force of the second spring 40. If the sliding door continues to be opened after reaching the stroke end of the piston rod portion 22, the cylinder portion 21 moves to the tip side against the pulling force of the second spring 40. When the hand is released from the sliding door, the sliding door is automatically closed by the pulling force of the first spring 30 and the second spring 40. At this time, the closing speed of the sliding door is suppressed by the damper 20.
[0035]
Thus, in the sliding door closer which concerns on embodiment of this invention, since the cylinder part 21 of the damper 20 moves to a longitudinal direction, a big opening / closing stroke is ensured. For this reason, smooth operation is guaranteed even when the case body 11 is not cut or when the cutting margin is small. When the cutting margin of the case main body 11 is large, the sliding door is opened only by pulling the piston rod portion 22 of the damper 20 from the cylinder portion 21 toward the tip side.
[0036]
The first spring 31 extends when the sliding door is opened. At this time, if the first spring 30 is short, the pulling force in the vicinity of the stroke end is very large as compared to when the piston rod portion 22 starts to be pulled out. However, in the sliding door closer according to the embodiment of the present invention, the main coil spring 31 is stretched in a U shape extending from the movable hook 23 to the one end of the case body 11 via the relay roller 60. Is big. In addition, the portion of the main coil spring 31 that rotates with the extension operation of the main coil spring 31 and engages with the relay roller 60 of the main coil spring 31 is constituted by the string 34. For this reason, the sliding door can be smoothly opened with a light force from the start of the withdrawal of the piston rod portion 22 to the end of the stroke.
[0037]
Further, when the shaft 52 of the reel mechanism 50 is pushed upward by the driver through the slit 13 of the outer case 10, the plurality of protrusions 53 provided on the lower surface of the roller 51 are detached from the recesses provided on the bottom surface of the recess 231, and the roller 51 becomes rotatable. When the shaft 52 is rotated by the driver in this state, the winding amount of the string body 33 on the roller 51 is changed, and the effective length (elongation amount) of the main coil spring 31 is changed, so that the force required to open the sliding door is adjusted. Is done.
[0038]
Further, by changing the fixing position of the damper stopper 70, the initial position of the damper 20, that is, the initial position of the connecting pin 24 is adjusted according to the width dimension of the sliding door.
[0039]
Further, the connecting pin 24 protrudes below the outer case 10, but since it is a detachable plug-in type, the protruding portion is eliminated by removing it during packing, and as a result, efficient packing is possible. Become.
[0040]
Further, since the cylinder portion 21 of the damper 20 is accommodated in the case main body 11 on the base end side with respect to the slit 13, it cannot be seen from the outside of the case main body 11. Therefore, it is excellent in design property.
[0041]
【The invention's effect】
As described above, in the sliding door closer according to the present invention, the damper in the outer case can move in the longitudinal direction of the case, so that a large opening / closing stroke that can be applied to a recent wide frontage can be easily secured. If the space for attaching the sliding door closer is narrow compared to the outer case, it can be dealt with by cutting off one end of the outer case. For this reason, it is not necessary to manufacture things with different lengths, and the manufacturing cost can be reduced. In addition, since the damper is housed in the outer case and is not visible from the outside, the design is excellent and the appearance is good.
[0042]
In addition, the first spring that pulls the piston rod portion of the damper toward the base end side is disposed from the distal end portion of the piston rod portion to one end portion of the outer case via a relay portion provided in the other end portion of the outer case. Since a coil spring is used, a long spring length can be secured. For this reason, even when securing a large opening / closing stroke, the sliding door can be smoothly opened with a light force to the stroke end of the piston rod portion.
[0043]
Moreover, the sliding door can be operated more smoothly by using the intermediate portion of the coil spring that engages with the relay portion in the outer case as a string.
[0044]
In addition, the coil spring is used as a string, and a reel mechanism that is wound around the string and rotated from the outside of the case through the slit of the outer case is attached to the tip of the piston rod part of the damper, thereby opening the sliding door. Can be easily adjusted from the outside of the outer case.
[0045]
In addition, for the connection with the sliding door, the connecting pin extending from the tip of the piston rod portion of the damper through the slit of the outer case to the outside of the case is made a detachable plug-in type for efficient packing. be able to.
[0046]
In addition, a damper stopper is provided between the damper and the relay portion and provided in the other end portion of the outer case, and the other end portion of the second spring is connected to the outer case. By being configured to be selectively screwed to a plurality of positions in the longitudinal direction, the initial position of the sliding door can be easily adjusted.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view of a sliding door closer according to an embodiment of the present invention.
FIG. 2 is a partially broken perspective view for explaining the internal structure of the damper of the sliding door closer according to the embodiment of the present invention.
FIG. 3 is a longitudinal side view for explaining the structure of the tip portion of the piston rod portion of the sliding door closer according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Outer case 11 Case main body 12 Mounting bracket 13 Slit 20 Damper 21 Cylinder part 22 Piston rod part 23 Movable hook 24 Connecting pin 30 1st spring 31 Main coil spring 32 Secondary coil springs 33, 34 String body 40 Second spring 50 Reel mechanism 60 Relay Roller (relay part)
70 Damper stopper 80 Hook

Claims (6)

In a sliding door closer that automatically closes the sliding door, a cylindrical outer case with a slit formed in the longitudinal direction, and a cylinder portion that is housed in the outer case and movable in the longitudinal direction, and from the cylinder portion A damper in which the piston rod portion protrudes toward one end of the case, and a connecting pin at the tip of the piston rod portion is connected to the sliding door through the slit; a first spring that elastically pulls the piston rod portion of the damper toward the other end of the case; , The cylinder portion of the damper is elastically pulled toward the other end of the case, and the second spring has a tensile force larger than the tensile force of the first spring, and the first spring has one end portion of the damper. Connected to the tip of the piston rod part, the intermediate part is located on the base end side of the damper, via the relay part provided in the other end part of the outer case, etc. Sliding door closer which part is characterized by having a coil spring connected to one end of the outer case. As the first spring, in addition to the coil spring, an insertion-type sub-coil spring that penetrates through the hollow piston rod portion, one end portion is connected to the tip portion of the piston rod portion, and the other end portion is connected to the base portion of the cylinder portion. The sliding door closer according to claim 1, further comprising: The sliding door closer according to claim 1, wherein an intermediate portion of the coil spring that engages with the relay portion in the outer case is formed of a string body. One end of the coil spring is formed of a string body, and a reel mechanism that is wound around the string body and rotated from the outside of the outer case through a slit of the outer case is attached to the tip of the piston rod section of the damper. The sliding door closer according to any one of claims 1 to 3. 5. A connecting pin that extends from the tip of the piston rod portion of the damper through the slit of the outer case to the outside of the outer case for connection with the sliding door is a detachable plug-in type. The sliding door closer according to any one of the above. A damper stopper is provided between the damper and the relay portion and provided in the other end of the outer case, and has a damper stopper connected to the other end of the second spring. The damper stopper is a longitudinal direction of the outer case. The sliding door closer according to claim 1, wherein the sliding door closer is selectively screwed to a plurality of positions.

Images