JPH0533656Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a door closer capable of holding a door in an open position.

``Prior Art'' Conventionally, door closers have been known that can automatically close an open sliding door or hold it open, and can selectively close or hold the sliding door open depending on the situation.

As disclosed in Japanese Utility Model Application No. 62-52677, a pinion 3 is attached to the tip of a gas spring 2 installed in a case 1 shown in FIGS. 8 and 9, and this pinion 3 is engaged. The matched fixed rack 4 is provided facing the direction of expansion and contraction of the gas spring 2, and the pinion 3 is sandwiched between the fixed rack 4 and the movable rack 5 meshed with the pinion 3. 1
A locking/disengaging mechanism 6 is supported on the case 1 so as to be movable relative to the case 1, and locks the movable rack 5 to the case 1 at the final end of storage of the movable rack 5 in the case 1.
This is provided on the side of the final end of the storage movable rack.

``Problem to be solved by the invention'' However, in such a conventional door closer, the locking/disengaging mechanism 6 for the movable rack 5 is provided on the side of the final end of the movable rack housing of the case 1;
When this door closer is built into the door, the operator has to operate the locking/disengaging mechanism 6 for the movable rack 5 in a narrow space, which poses a problem in operability.

The object of the present invention is to provide a door closer which solves the above problems encountered in the prior art.

"Means for Solving the Problems" The present invention has the following configuration in order to achieve the above object. That is, a pinion is rotatably attached to the tip of a spring unit that is attached to a case, a fixing rack that is fixed to the case in the direction of expansion and contraction of the spring unit and meshes with the pinion, and the fixing rack. A door closer comprising: a movable rack which is engaged with the pinion with the pinion sandwiched therebetween, is opposed to the fixed rack, and is supported by the case so as to be movable relative to the case;
a stopper that is movably provided on a hook portion formed on the movable rack, protrudes toward the hook portion, and is removably hooked to the hook portion to lock the movable rack; The movable rack is provided on the protruding side of the case.

``Operation'' The stopper is pushed up on the opening side of the case, and the upper end of the stopper can be fitted into and removed from the recess of the moving rack.This allows the sliding door to be held in the open state and the sliding door to be automatically closed. , and can be easily operated in a wide area.

"Embodiment" An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. Reference numeral 11 in these figures indicates a case embedded within the sliding door 12 shown in FIGS. 4 and 5. The case 11 is made of a rectangular tube with a rectangular cross section and a bottom portion 13, and a flange 14 is formed at the opening thereof. On one side of both side walls of the case 11 (the upper part in FIGS. 1 to 3), there is a rail-shaped projection 1 that projects into the case 11.
5 and 15 are formed over the entire length of the case 11.

Inside the case 11 is a gas spring (spring unit) located at one end of the case 11.
16 is attached by brackets 17,17. The gas spring 16 is configured such that the pinion rod 18 is biased and protrudes from the cylinder 19 along the axial direction of the cylinder 19 by the pressure of the gas sealed within the cylinder. The gas spring 16 expands and contracts in the same direction as the length direction of the case 11.

A bracket 20 is attached to the tip of the pinion rod 18.
A large-diameter pinion 21 and a small-diameter pinion 22 are rotatably attached to each other via. The large-diameter pinion 21 is located between two identical small-diameter pinions 22, 22, and these small-diameter pinions 22, 22
It is coaxially and integrally provided with.

On the other hand, the other side of the case 11 (see FIGS. 1 to 3)
A fixed rack 23 is attached to the lower part of the rack 23 (lower part in the figure) facing the expansion and contraction direction of the gas spring 16. A groove 24 is formed in the center of the width of the fixed rack 23 over the entire length of the fixed rack 23. The fixed rack 23 has a groove 24 in which the large diameter pinion 21 is inserted.
A part of the outer periphery of each small-diameter pinion 22 is fitted into the small-diameter pinion 22.
It is meshed with.

On the other hand, on the opposite side of the large-diameter pinion 21 from the fixed rack 23, a moving rack 25 is provided facing the fixed rack 23. The operating rack 25 is engaged with the large diameter pinion 21, and the fixed rack 25 is engaged with the large diameter pinion 21.
The case 1 is movable relative to the case 11 while the pinions 3 and 3 are engaged with the small diameter pinions 22, 22.
It is attached to 1. Grooves 26, 26 extending in the longitudinal direction of the movable rack 25 are formed on both sides of the movable rack 25, respectively.
6 is slidably fitted into protrusions 15, 15 of case 11, and movable rack 25 is held by these protrusions 15, 15.

The teeth 26a of the movable rack 25 (which can also be used as a hook portion as described later) are provided in the majority part of the case on the gas spring 16 side, and the teeth 26a are provided on the remaining open side of the case 11 adjacent to the teeth 26a. Concave portions 27 and convex portions (hook portions) 28 are provided alternately at predetermined intervals in the length direction of the moving rack 25. These uneven portions have a sawtooth shape as a whole.

Furthermore, a mounting plate 30 having the same hole 29 as the opening of the case 11 connects the hole 29 to the opening of the case 11.
It is attached to the flange 14 and provided in a state where it is aligned with the opening of the flange 14. Two hook-shaped claws 31, 31 are formed on the mounting plate 30 by cutting and raising a part of the plate. Claw 31,
31 are formed to be spaced apart and facing each other, and the claws 3
An L-shaped plate-shaped stopper 32 having a rectangular front view is slidably fitted between the stopper 1 and 31. The end of the stopper 32 on the movable rack side can be fitted into and removed from the recess 27 of the movable rack 25, and the end of the stopper 32 on the fixed rack 23 side projects outward and serves as a finger hook 33. When the end of the stopper 32 on the movable rack side is fitted into the recess 27, the large diameter pinion 21,
When the movable rack 25 attempts to protrude from the opening of the case 11 via the small diameter pinion 22, the convex portion 28 of the movable rack presses against the pawls 31, 31 and locks it, and conversely, the movable rack 25 protrudes from the case 11. It is designed to prevent

The case 11 is embedded in one of the sliding doors 12 within a frame 34 shown in FIG. 4, and the tip of the movable rack 25 is attached to the other sliding door 12. Note that 35 is an opening such as a doorway or a passage.

Next, the operation of the door closer configured as above will be described.

When using the door closer, case 11
is embedded and fixed in the upper part of one of the sliding doors 12 as shown in FIG. At this time, the person hooks his or her finger on the finger hook 33 and pulls down the stopper 32,
The tip of the movable rack 25 is fixed to the upper part of the other slide door 12 so that the movable rack 25 can protrude and retract from one slide door 12.

When one of the slide doors 12 is opened in the direction of arrow A in FIG. At this time, the large-diameter pinion 21 and the small-diameter pinion 22 rotate and move together with the piston rod 18 toward the cylinder 19 of the gas spring 16, and the gas within the gas spring 16 is compressed. When one slide door 12 is released (let go), the piston rod 18 protrudes from the cylinder 19 due to the compressed gas pressure within the gas spring 16. Accordingly, the movable rack 25 protrudes from the case 11 via the fixed rack 23, the small diameter pinion 22, and the large diameter pinion 21, and moves one sliding door 12 in the direction of arrow B in FIG. to close the opening 35.

By the way, there are cases where it is desired to keep the sliding door at the entrance/exit partially open, for example when the indoor air is overheated and the user wants to exchange the indoor air while staying in the room. In such a case, the person going in and out leaves one sliding door 12 half open and presses the stopper 32.
Put your finger on the finger hook 33 and push it up to fit the end of the stopper 32 on the movable rack 25 side into the recess 27 of the movable rack 25, and then release your hand from one of the slide doors 12. Then, gas spring 16
The force that causes the piston rod 18 to protrude from the cylinder 19 due to the compressed gas pressure inside the fixed rack 23, the small diameter pinion 22, and the large diameter pinion 2
1 to the moving rack 25, and the moving rack 2
A stopper 32 is attached to the claws 31, 31 by the convex portion 28 of 5.
to impose. As a result, the stopper 32 prevents the movable rack 25 from popping out from the case 11,
The half-opened sliding door 12 is held in that position. The open position of the sliding door 12 is not limited to the half-open state, but the sliding door 12 can be held at any open position within the range in which the recess 28 is formed (from a substantially half-open state to a fully open state).

When the slide door 12 is held open, the projection 28 of the movable rack 25 is opened by hooking the finger on the finger hook 33 and pulling down the stopper 32.
The stopper 32 comes off and the sliding door 12 can be automatically closed.

The above-described maintenance of the open state of the sliding door 12 is not limited to the case where one sliding door 12 is opened, but also applies when the other sliding door 12 is opened (the above is the first embodiment).

In the above embodiment, the sliding door 12 is held within the range of approximately half open state to fully open state, but the present invention is not limited to this, and for example, as shown in FIG. A large number of recesses 41 are also provided at predetermined intervals in the length direction of the movable rack 40 on both sides of the width of the teeth (not shown in FIG. 6) formed in the rack 40 and meshing with the pinion attached to the gas spring. It is also possible to form a protrusion 43 on the upper end of the stopper 42 that can fit into these recesses 41.

In this way, the sliding door 12 can be held in a slightly open state, which is convenient for taking in cool air in the summer, taking in cold air into a heated room in the winter, or securing a passage for pets. Example).

Furthermore, in each of the embodiments described above, when maintaining the open state of the sliding door 12, a person must use the stopper 3.
This retention can be obtained by operating No. 2, but is not limited to this, for example, No. 7.
As shown in the figure, the stopper 51 is formed into a substantially rectangular plate with an arcuate lower end, and a pin 52 located below the stopper 51 is provided on the mounting plate 30 parallel to the movable rack 25. A pressure sensitive plate 5 having a mounting portion 53 formed at the upper end of a shaft provided on the upper part of one side of a rectangular plate parallel to the
4 is rotatably attached to the pin 52, a protrusion 55 is provided on the upper part of the attachment part 53, and this protrusion 55 is brought into contact with the lower end of the stopper 51, so that the pin 56 attached to the stopper 51 and Said mounting plate 3
A tension spring 57 is attached to the pin 52 provided at the
Pull the stopper 51 to the side, and when the top of the protrusion 55 comes into contact with the stopper 51, the stopper 5
1 fits into the recess 27 of the movable rack 25 to maintain the open state of the sliding door 12, and the pressure sensitive plate 5
4 rotates around the pin 52, the stopper 51
It may be configured so that the slide door 12 is closed by lowering and disengaging from the recess 27.

In this way, when the sliding door 12 is held in the open state, strong winds can blow against the sliding door 12.
When the pressure sensitive plate 54 passes through the opening, the pressure plate 54 rotates around the pin 52, the protrusion 55 is removed from the stopper 51, and the stopper 51 is lowered by the tension spring 57, so that the stopper 51 becomes a movable rack. 25, and move the rack 25 away from the case 11.
extends, and the sliding door 12 automatically closes.

Therefore, according to this embodiment, for example, when a gust of wind blows away documents in an office, it is possible to prevent the documents from being blown away, and when strong winds cause dust to adhere to products on display at a store, this can be prevented. It is possible to prevent dust from adhering to the product.

Note that when it is not desired to keep the sliding door 12 in the open state, if the pressure sensitive plate 54 is rotated to keep the stopper 51 separated from the movable rack 25, the stopper 51 will be pulled by the tension spring 57. This state is always maintained, and the door closer functions as a normal door closer that does not hold the sliding door 12 open (the third embodiment).

In addition, in the first and third embodiments, the upper end of the stopper 32 is placed in the recess 27 of the moving rack 25.
In the second embodiment, the recess 41 of the moving rack 40
Although the slide door 12 is held open by fitting the upper ends of the stoppers 51 into the respective holes, the present invention is not limited thereto. By extending the movable racks 25, 40 in the longitudinal direction, a stopper 32,
42, 51 can also be fitted to hold the sliding door 12 open (this is the fourth embodiment).

In addition, in the first embodiment, the stopper 3
2 is provided on the outside of the mounting plate 30, but the present invention is not limited to this. For example, the case 11 is provided on the inside of the mounting plate 30.
(The above is the fifth embodiment).

Further, a hook portion is provided on the side surface of the movable rack (left and right side portions of the movable rack in FIG. 2), and the hook portion protrudes toward the hook portion and is detachably connected to the hook portion. A stopper that is hung and locks the moving rack may be provided on the mounting plate 30 (sixth embodiment).

"Effect of the invention" According to the invention, the rack is provided on the hook part formed on the movable rack so as to be movable forward and backward, protrudes toward the hook part side, and is detachably pulled on the hook part. A stopper that is hung and locks the movable rack is provided on the protruding side of the movable rack of the case, so that the sliding door can be held in the open state by engaging and disengaging the stopper from the movable rack. It can also be closed automatically, and this operation can be easily performed in a wide area.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention, in which Figure 1 is a vertical side view, Figure 2 is a view taken in the direction of the arrows in Figure 1, and Figure 3 is taken along the - line in Figure 1. 4 is a sectional view taken along line 4, FIG. 4 is a sectional view showing the door closer of the present invention attached to a sliding door, FIG. 5 is a sectional view taken along line - in FIG. 7 is a perspective view showing still another embodiment of the present invention, FIG. 8 is a vertical side view of a conventional door closer, and FIG. 9 is a sectional view taken along line - in FIG. 8. 11...Case, 16...Gas spring (spring unit), 21...Large diameter pinion, 2
2...Small diameter pinion, 23...Fixing rack, 2
5, 40...Moving rack, 26a...Teeth (hooking part), 28...Convex part (hooking part), 27, 41
...Concavity, 32, 42, 51...Stopper.

Claims (1)

[Scope of utility model registration request] A pinion is rotatably attached to the tip of a spring unit installed inside the case,
a fixing rack fixed to the case in the direction of expansion and contraction of the spring unit and meshed with the pinion; In a door closer comprising a movable rack supported by the case so as to be movable relative to the case, the movable rack is provided on a hook portion formed on the movable rack so as to be movable forward and backward, and protrudes toward the hook portion. a stopper that is removably hooked to the hook portion and locks the moving rack;
A door closer characterized in that it is provided on a protruding side portion of the moving rack of the case.