JPH0450790Y2 - - Google Patents

Description

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

2. Description of the Related Art A door closer that has been generally known in the past includes a main body and a link connected to the main body, and is disposed between a building-side mounting frame and a door.

Problems that the invention aims to solve Doors are attached to the mounting frame on the building side using hinges so that they can rotate around the vertical axis, but the attachment condition of the door is not constant; The rotation trajectory of the door will vary depending on the difference. Therefore, if the door closer is attached differently to each door, there is a problem that the maximum opening angle that can be achieved with one door cannot be achieved with another door.

This invention solves these problems,
The purpose is to make it possible to easily obtain the same opening angle even if the installation state of the door changes.

Means for Solving the Problem In order to solve this problem, the present invention provides a structure in which one end side of the link is pivotally supported on one end side of the casing serving as the main body of the door closer, and a coil extending in the longitudinal direction of the casing is provided in the casing. A spring is provided, and a spring receiving member is provided which is slidable to receive one end of the coil spring, a cam member is provided on the spring receiving member, and the cam surface of the cam member is brought into contact with a roller provided at one end of the link. The link is urged in a direction to rotate so as to be substantially parallel to the casing, a connecting fitting is pivotally supported at the other end of the link, and the cam member is positioned so that the casing is rotated with respect to the spring receiving member. It is configured to be adjustable back and forth perpendicular to the longitudinal direction.

Effect: With this configuration, even if the mounting state of the door changes, the same opening angle can be easily obtained by adjusting the cam member back and forth with respect to the spring receiving member.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.

In FIGS. 1 to 10, reference numeral 1 denotes a metal casing having a U-shaped cross section and serving as the main body of the door closer, and one end of a link 2 is pivotally supported by a shaft 3 at one longitudinal end of the casing 1. ing. The link 2 is provided so as to be able to fit into the opening 4 of the casing 1 having a U-shaped cross section, and is bent toward the inside of the casing 1 to have a U-shaped cross section. At one end of the link 2, a roller 5 made of synthetic resin for transmitting spring pressure is provided parallel to the shaft 3 at a position closer to the tip than the shaft 3. A roller 6 made of synthetic resin is also fitted onto the shaft 3 inside the link 2. This roller 6
is for reinforcing one end of the link 2. Reference numeral 7 denotes a coil spring provided inside the casing 1 along the longitudinal direction of the casing 1. One end of the coil spring 7 is in contact with and received by a support plate 8 provided near the other end of the casing 1 in the longitudinal direction. The other end is received by being fitted into a recess 10a on the other end side of a spring receiving member 10 made of synthetic resin, which has a cam member 9 made of synthetic resin on one end side that comes into contact with the roller 5. Incidentally, the support plate 8 has a protrusion 8a fitted into a notch 11 formed in the bottom plate (front) of the casing 1, and the back surface of the support plate 8 is supported by a shaft 12 attached to the casing 1. . The spring receiving member 10 has a rectangular outer surface, and the outer surface of the spring receiving member 10 contacts the three inner surfaces of the casing 1 so that the spring receiving member 10 can slide in the longitudinal direction of the casing 1. Specifically, the spring receiving member 10 has a hole 13 that extends vertically and extends along the longitudinal direction of the casing 1, and a shaft 14 attached to the casing 1 is inserted through the hole 13. The spring receiving member 10 is designed to be able to slide as a guide. The cam member 9 provided on this spring receiving member 10 has protrusions 9a formed on both sides of the cam member 9 engaging with a groove 10c formed on the inner surface of a recess 10b on one end side of the spring receiving member 10. By rotating the screw 15 screwed into the cam member 9 through the hole 16 formed in the bottom plate (front part) of the casing 1 with a screwdriver or the like, the cam member 9 is moved near and far with respect to the bottom plate of the casing 1. I'm starting to be able to do it. 17 is a spring receiving member 1 for rotatably supporting the tip of the screw 15.
This is a plate attached to 0. Furthermore, this cam member 9 has a cam surface 18 (details will be described later) on the surface facing the spring pressure transmission roller 5,
The roller 5 is configured to come into pressure contact with this cam surface 18. Reference numeral 19 denotes a brake device (cylinder device) interposed between a portion near one end of the link 2 and a portion near the other longitudinal end of the casing 1.
As shown in FIG. 8, this brake device 19 includes a cylindrical body 20 constituting a cylinder casing;
This cylindrical body 20 is inserted from one end side, and the cylindrical body 2
The piston 23 is slidably supported by a bearing 21 provided at one end of the 0 and a bearing 22 provided at a position slightly closer to the other end than the intermediate portion, and a piston 23 is provided at an intermediate portion in the longitudinal direction between the two bearings 21 and 22. a coil spring 25 that is fitted onto a portion of the rod 24 that protrudes from the cylindrical body 20 in order to bias the rod 24 in a direction protruding from one end of the cylindrical body 20; and the two bearings 21. , 22 is filled with oil (not shown).
More specifically, the rod 24 is constructed by connecting two rod members 24a and 24b at their ends, and the piston 2 is connected to one end of the other rod member 24b into which one end of one rod member 24a is fitted.
3 is formed, and the fitting portions of both rod members 24a, 24b are connected to each other by a pin 29 at the piston 23 forming portion. In addition, at the fitting portion of both rod members 24a, 24b, passages 26a, 26b are formed inside the rod members 24a, 24b, which communicate with each other and open into the space between the bearings 21, 22 on both sides of the piston 23. The rod 24 is located inside these channels 26a and 26b.
When entering the inside of the cylindrical body 20, the flow path 26
Check valve 2 that works to cut off communication between a and 26b
7 is provided. Furthermore, when the rod 24 enters the inside of the cylindrical body 20, the rod 24 enters into the space inside the cylindrical body 20 on the other end side of the bearing 22, and this entry causes the rod 24 to rust. To prevent this, a small amount of oil (not shown) is injected into the internal space of the cylindrical body 20 on the other end side of the bearing 22. Reference numeral 28 denotes a cap that closes the other end of the cylindrical body 20. A small hole 28a is formed in the center of the cap 28, and the inner surface of the cap 28 is made of a material such as a sponge that is breathable and capable of absorbing oil. An elastic material 30 is provided.
31 is a connecting member that fits onto the other end of the cylindrical body 20;
A connecting member 32 is fitted onto the tip of the rod 24 projecting outward from the cylindrical body 20 and connected by a pin 33. The coil spring 25 fitted onto the rod 24 has one end in contact with the bearing 21 and the other end in contact with the connecting member 32, so that the rod 2
4 is urged in a direction to protrude from one end side of the cylindrical body 20. The connecting member 31 that is fitted onto the other end of the cylindrical body 20 is supported by a shaft 34 provided near the other end of the casing 1 in the longitudinal direction, and is fitted onto the tip of the rod 24 for connection. The connecting member 32 is connected to the shaft 3 provided near one end of the link 2.
It is supported by 5. 36 is a block made of synthetic resin attached to a shaft 52 provided at the other end in the longitudinal direction of the casing 1;
metal plates 3 in front and rear of the casing 1, that is, parallel to the axis 52 and parallel to the longitudinal direction of the casing 1.
7 and 38 are installed. One plate 37 located on the opening 4 side of the casing 1 has a hole 37a through which one of the two screws 39, 40 is inserted and a screw hole 37 through which the other screw 40 is screwed.
b is formed, and the other plate 38 has two screws 3.
Holes 38a and 38b are formed through which screws 9 and 40 are inserted, and two screws 39 and 40 are also formed in the block 36.
Holes 36a and 36b are formed through which the holes 36a and 36b are inserted. 41 is a mounting frame on the building side to which the door 42 is attached rotatably around the vertical axis, and this mounting frame 4
A bearing fitting 43 for supporting the other end in the longitudinal direction of the casing 1 is attached to the vicinity of the upper end of the casing 1 by screws 51 via a metal plate 50 in parallel with the door 42 in the closed state. . This bearing fitting 43 has plate portions 43a, 43a located on both inner surfaces of the casing 1 and between both outer surfaces of the block 36.
3a has grooves 43b, 43 that engage with the shaft 52.
It is equipped with b. Specifically, the shaft 52 is inserted into the grooves 43b, 43b diagonally from the front side of the casing 1.
The grooves 43b, 43b are approximately L so that they can be engaged with the
The shaft 52 is formed in a mold, and the shaft 52 fits into this groove 43b,
After engaging with 43b, it can move back and forth within the grooves 43b, 43b. Note that metal plates 44 and 45 are brought into contact with the front and rear of the bearing fitting 43, respectively, and these two plates 44 and 4
5, the block 36 and thus the shaft 52 can be moved back and forth. The one screw 39 is inserted into the block 36 from the other plate 38 side, protrudes from the one plate 37, and is screwed into a screw hole 44a provided in the plate 44 to engage the bearing fitting 43. The plate 44 is brought into contact with the front end of the bearing fitting 43 by drawing the plate 44 toward the mating block 36. The other screw 40 is connected to the plate 4
5 is inserted into the block 36 through a hole 45a provided in the one plate body 37, and is screwed into the screw hole 37b of the one plate body 37 to move the block 36 back and forth inside the bearing fitting 43, and the one screw 39 After adjustment using the other screw 40, the block 36 is fixed by tightening. The plate body 44 is provided with a hole 44b into which the tip of the other screw 40 is inserted, and the plate body 45 is provided with a hole 44b into which the tip of the other screw 40 is inserted.
An insertion hole 45b for a screwdriver or the like is provided so that the adjustment can be made from the outside. Above block 3
6. The door closer casing 1 is supported by the mounting frame 41 by the shaft 52, the bearing fittings 43, the plates 44, 45, the screws 39, 40, etc.
The other end side of the link 2, whose one end side is pivotally supported on one end side in the longitudinal direction of the casing 1, is pivoted on the other end side of the link 2 to a support fitting 46 attached to the inner surface of the end portion of the door 42 adjacent to the mounting frame 41. It is connected to the door 42 by fitting the supported connecting fitting 47 and fixing it with screws 48.

When the door 42 connected to the link 2 of the door closer configured as described above opens around the vertical axis, the roller 5 comes into contact with the cam surface 18 of the cam member 9 and pushes the coil spring 7. Shrink it. The spring force of the coil spring 7 is applied to the cam surface 18 of the cam member 9, the roller 5 that comes into contact with the cam surface 18, and the link 2.
The force is transmitted to the door 42 in the closing direction through the coil spring 7, and when the user releases the opened door 42, the door 42 automatically closes due to the spring force of the coil spring 7. When the door 42 is closed, the door 4
The brake device 19 is provided to prevent the link 2 from hitting the mounting frame 41 side with impact, and when the door 42 closes, the brake device 19 prevents the link 2 from hitting the mounting frame 41 side with impact.
By pushing the rod 24 into the cylindrical body 20, the piston 23 attempts to be positioned on the bearing 22 side, but at this time, the oil between the piston 23 and the bearing 22 is removed by the check valve 27 being closed. and flows from around the piston 23 between the piston 23 and the bearing 21. Since the distance between the periphery of the piston 23 and the inner surface of the cylindrical body 20 is small, the amount of oil flowing is small, and the brake is thereby applied. When the door 42 is opened, the link 2 opens at an angle with respect to the casing 1, so that the rod 24 moves in the direction of protruding from the cylindrical body 20. This rod 2
At the same time as the piston 23 moves toward the bearing 21, the oil between the piston 23 and the bearing 21 pushes open the check valve 27, and the inside of the flow paths 26a, 26b and the piston 23
The fluid flows between the piston 23 and the bearing 22 from around the piston 23 and the bearing 22. By the way, the coil spring 25 prevents the brake device 19 from rattling between the casing 1 and the link 2.

The cam surface 18 of the cam member 9 has a stepped portion 18a at an intermediate portion in the moving direction of the cam member 9, and the door 4
2 is opened 90 degrees, the roller 5 is attached to the stepped portion 18a.
are in contact with each other to maintain the open state of the door 42. When closing the door 42 from the state where the roller 5 is in contact with the stepped portion 18a, the stepped portion 18 can be closed by manually pushing the door 42 in the closing direction.
The door 42 is automatically closed by the spring force of the coil spring 7 when the engagement between the roller 5 and the door 42 is disengaged.
Further, the cam member 9 is movable by the screw 15, so that when the door 42 is opened, for example, 90 degrees, the roller 5 can be prevented from coming into contact with the stepped portion 18a and the hand can be removed from the door 42. The door 42 can also be configured to close automatically, and FIG. 9 shows the state in which the door 42 is attached by the hinge 49 in the solid line state and the state in which the door 42 is attached by the hinge 49 in the state shown in two-dot chain line that jumps out from the solid line state. Due to the difference between door 42
Since the positions of the open state of the cam surface 1 are different,
The contact position of the roller 5 with respect to the roller 8 changes. Therefore, by adjusting and moving the cam member 9 using the screw 15, the relationship between the cam surface 18 and the roller 5 can be adjusted to be the same no matter how the door 42 is attached.

Next, the block 3 is fixed by the screws 39 and 40.
By adjusting the longitudinal position of the roller 5 and the cam 6, the angle in the longitudinal direction of the casing 1 with respect to the bearing fitting 43 changes, and the casing 1 is tilted with respect to the bearing fitting 43 as shown by the two-dot chain line in FIG. The pressing force of the coil spring 7 is increased through the member 9, and the spring force can be strongly adjusted.

Effects of the Invention As described above, according to the present invention, even if the mounting state of the door changes, the same opening angle can be easily obtained by adjusting the cam member back and forth with respect to the spring receiving member.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is an exploded perspective view of the door closer, Fig. 2 is a perspective view showing how the door closer is attached to the mounting frame of a building, and Fig. 3 is an exploded perspective view of the door closer. A schematic perspective view showing the state, FIG. 4 is an enlarged perspective view of the same,
Figure 5 is a cross-sectional view of the door closer when the door is closed, Figure 6 is an enlarged perspective view of the door closer attachment part when the door is about to open, and Figure 7 is a cross-sectional view of the door closer when the door is open. 8 is a cross-sectional view of the brake device (cylinder device), FIG. 9 is a cross-sectional view of a main part explaining the operation of the cam member, and FIG. 10 is a cross-sectional view of the main part explaining the operation of the spring force adjusting section. 1...Casing, 2...Link, 3...Shaft,
5...Roller, 7...Coil spring, 9...Cam member, 10...Spring receiving member, 15...Screw, 18
...Cam surface, 41...Mounting frame, 42...Door, 4
6...Supporting metal fittings, 47...Connecting metal fittings.

Claims (1)

[Scope of utility model registration request] One end side of the link is pivotally supported on one end side of a casing serving as the main body of the door closer, a coil spring extending in the longitudinal direction of the casing is provided in the casing, and a slidable spring receiving member is provided to receive one end of the coil spring. A cam member is provided on the spring receiving member, and the cam surface of the cam member is brought into contact with a roller provided at one end of the link to urge the link in a direction to rotate so as to be substantially parallel to the casing. A door closer further comprising: a connecting fitting being pivotally supported at the other end of the link, and further configured to allow the position of the cam member to be adjusted back and forth orthogonal to the longitudinal direction of the casing with respect to the spring receiving member.