JPH0477796B2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field of the Invention> The present invention is used, for example, in a box opening of a control center, a closed switchboard, etc., and the latch is placed on the side of the opening by rotating a handle. This invention relates to a door stop device that engages and disengages from a locking portion.

<Prior art> Conventional examples of this type of door stop device are shown in Figures 1 and 2.
This will be explained based on the diagram. In FIG. 1, a door stop device 3 is provided on a door 2 provided at an opening 9 in a box side wall 1 of a control center or closed switchboard. The box side wall 1 has a front flange 1A formed on the front side, which serves as a contact surface for the door 2, and is further bent inward to form a folded flange 1B. The folded flange 1B is provided with a square hole 1C into which a latch, which will be described later, is engaged and disengaged. The bearing 4, which is the main body of the door stop device 3, has a front flange 4A exposed on the surface of the door 2 on its front outer periphery, and a tightening nut 5 that is screwed into a threaded portion 4B provided on the outer periphery of the inner surface of the door 2. It is attached and fixed to door 2. The operating shaft 6, which is rotatably supported in the bearing 4, has an operating handle 6A at the tip (front side) for rotating the shaft, and a prismatic section 6B at the rear end (back side). It is formed. A latch 7 is fitted into this prismatic portion 6B so as to rotate integrally therewith, and is fixed with a bolt 8.

As shown in FIG. 2, the latch 7 is formed into a substantially curved bead shape having a square hole 7A that receives the square column part 6B and a latch hook part 7B. It enters inside from the lower edge of , that is, the back side of the folded flange 1B, and is locked.

To assemble the conventional door stop device configured as described above, first, with the latch 7 and operating shaft 6 removed, the bearing 4 is inserted into the door 2 and tightened and fixed with the tightening nut 5. , put the operating shaft 6 into the bearing 4,
It is necessary to fix the latch 7 to the operating shaft prismatic portion 6B via the bolt 8 while supporting it.

In this way, in the conventional technology, generally large doors 2
However, it was necessary to assemble each part of the small door stop device one by one, which was not efficient.

Furthermore, if there is a charged exposed portion inside the door 2, there is a risk that the conventional door stop device 3 may cause the door 2 to be opened inadvertently, resulting in an accidental electric shock. In order to prevent the above accidents, it is possible to adopt a door locking device with a key, but key management is generally troublesome.
The problem of lost keys also arises. In such a case, a door stopper that can be opened using a tool such as a screwdriver can prevent the door 2 from being opened inadvertently. For control centers and the like installed in electrical rooms that are not accessible to the general public, the above-mentioned problem can be sufficiently solved by using a door stop device that can be operated by a tool rather than a key.

Furthermore, since the bearing 4 and the operating shaft 6 of the conventional door stop device 3 are generally manufactured from zinc die-casting for strength, the clearance between them is relatively large, causing looseness and the latch 7. This causes tilting in the depth direction, and vibrations tend to cause abnormal noise.

<Summary of the Invention> Therefore, in view of the above-mentioned conventional problems, the present invention provides an assembly in which an operating shaft and a latch are assembled into a bearing, so that the assembly can be inserted from the back side of the door and fixed on the front side of the door. In addition to improving the mounting efficiency on the door, a ring cap is provided at the door-side end of the bearing so that the tip end surface of the operating shaft faces outward, and the tip end of the operating shaft can be rotated with a tool. The purpose of this structure is to prevent the door from being opened accidentally and improve safety.

Another object of the present invention is to enable the ring cap and handle to be selectively attached depending on the purpose.

Furthermore, an object of the present invention is to reduce the cost of surface treatment of the bearing by providing a protruding portion at the base of the handle that extends to cover a nut for tightening and fixing the bearing to the door. .

Furthermore, the present invention provides an elastic member that is installed between the latch that rotates within the bearing and the operating shaft.
The purpose of the present invention is to prevent the operating shaft and the latch rotated by the operating shaft from rattling by providing a structure that provides a suitable elastic force to the latch and the operating shaft.

<Embodiments of the Invention> Hereinafter, preferred embodiments of the present invention will be described based on FIGS. 3 to 7.

In these figures, 1, 1A, 1B, and 1C are the side walls of the box body, the front flange, the folded flange, and the square hole, respectively, as in FIG. 13 is a door stop device according to the present invention provided on the door 2. The bearing 14 is formed with a back flange 14A that comes into contact with the back surface of the door 2, and the bearing 14 has a threaded portion 14B provided on the outer periphery of the tip that comes out from the opening 2A of the door 2, that is, the end that is attached to the door 2. It is tightened and fixed to the door 2 by a tightening nut 15 that is screwed together. The operating shaft 16 includes a prismatic tip portion 16A, a large diameter portion 16B, a medium diameter portion 16C, a small prismatic portion 16D, and a small diameter portion 16E. The large diameter portion 16B abuts inside the bearing 14, and the small diameter portion 16E fits into a hole 14C provided at the bottom of the bearing 14 and is rotatably supported.

The latch 17 has almost the same shape as the one in FIG.
7A, and a latch hook portion 17B that enters and locks into the square hole 1C of the folded flange 1B.

Reference numeral 19 denotes a coil spring as an elastic member that is interposed between the operating shaft 16 and the latch 17 and constantly urges the latch 17 in the axial direction and presses it against the inner surface of the bearing 14. The large diameter part 1
6B and the latch 17.

The bearing 14, the operating shaft 16, the latch 17, and the coil spring 19 can be assembled as one assembly in separate steps as described below by using the retaining ring 20 attached to the small diameter portion 16E of the operating shaft.

First, the latch 17 is inserted through the rotation groove 14D provided along the inner bottom of the bearing 14, and then inserted into the square hole 17A.
Align it with hole 14C. Next, coil spring 19
The small diameter part 16E protrudes from the bottom of the bearing 14 by fitting it into the medium diameter part 16C of the operating shaft and then putting it into the bearing 14, passing the small diameter part 16E through the square hole 17A and the hole 14C.
Attach the retaining ring 20 to the. Although it is necessary to perform this work while compressing the coil spring 20, it can be easily performed using an assembly jig or the like. The assembly assembled in this manner is inserted into the door 2 from the back side and tightened and fixed with the tightening nut 15. The base of the handle 21 made of synthetic resin is formed with a disc part 21A and a skirt part 21B extending from the circumferential end of the disc part 21A toward the surface of the door 2 so as to cover the tightening nut 15. A cylindrical portion 21C that fits into the prismatic portion 16A at the tip of the operating shaft is formed on the back surface of the disc portion 21A, and a pair of engaging legs 21D are formed from the lower end of the cylindrical portion 21C. The operation shaft large diameter portion 1 corresponds to the above-mentioned engaging leg 21D.
6B is provided with a pair of vertical grooves 16F, inside which is a protrusion 16 with which the step of the engagement leg 21D is elastically engaged.
G is provided. The handle 21 is thus finally elastically attached to the operating shaft 16. The disk portion 21A and the skirt portion 21B cover the bearing screw portion 14B and the tightening nut 15, resulting in a desirable design.

Next, a type of closing operation using a tool will be explained based on FIGS. 6 and 7.

In these figures, reference numeral 113 indicates a door stop device of the type that can be operated only with a tool. The bearing 14 is provided with a pair of vertical grooves 14E on the inner front side, and the vertical grooves 1
A square hole 14F is provided continuously from 4E and penetrates outward. The operation shaft 16 has a thin groove 16H for a flathead screwdriver on the tip surface of the tip prismatic portion 16A.
is provided. And the door stop device 13
The vertical groove 16F and protrusion 16G, which correspond to the above, are not provided. Note that the components other than those described above are the same as those of the door stop device 13.

Tightening nut 15, latch 17, coil spring 1
9. The retaining ring 20 is exactly the same as that of the door stop device 13, and they are assembled in the same way. 22 is a ring cap made of synthetic resin;
Outer skirt portions 22B on both sides of the annular portion 22A,
An inner skirt portion 22C is formed. The outer skirt portion 22B and the inner skirt portion 22C are respectively connected to the door 2.
It extends to the surface of the operating shaft large diameter portion 16B, covers the bearing screw portion 14B and the tightening nut 15, and inside the inner skirt portion 22C, only the tip prismatic portion 16A is exposed toward the back.

That is, the annular portion 22A and the outer skirt portion 22B
This forms an overhanging portion that covers the tightening nut 15, and the inner skirt portion 22C forms an opening through which the narrow groove 16H faces.

From the back surface of the annular portion 22A, the vertical groove 14
An engaging leg 22D corresponding to E is provided protrudingly, and the square hole 14
It elastically engages with the F section. The ring cap 22 is thereby locked onto the bearing 14. Door stop device 1
3 passes through the ring cap 22 and enters the thin groove 16H of the operating shaft, and can be rotated only by, for example, a flat head screwdriver.

Door stop device 13, 11 configured as above
3, operation shaft 16, latch 17, coil spring 19
Since the bearing 14 including the door 2 can be assembled in a separate process before the door 2 is attached, work efficiency can be greatly improved.

Further, according to this configuration, the ring cap 22
is attached to the protruding end of the bearing 14 from the door opening 2A, and the operating shaft 16 is operated with a tool, thereby making it possible to prevent the door from being opened inadvertently.

Furthermore, according to this configuration, the handle 21 and
The ring cap 22, the tip of the operating shaft 16, and the end of the bearing 14 protruding from the door opening 2A,
Since it has a structure that can be selectively attached to the door, it can be easily changed between a manually operated type and a tool operated type, and by making it a tool operated type, it prevents the door from being opened accidentally. can do.

Further, since the bearing screw part 14B and the tightening nut 15 are hidden by the disc part 21A and the skirt part 21B of the handle 21, the bearing 14 and the tightening nut 15 can be used as they are, for example, made of zinc die-cast material. Cost can be reduced. Also, the handle 21
Since it is constructed separately from the operating shaft 16, it can be made of synthetic resin and can be manufactured in various colors. Therefore, it is possible to unify the design by using the same color as the synthetic resin display panel disposed on the same door 2.

Further, the latch 17 is guided and rotated within the rotation groove 14D of the bearing, and is biased toward the back of the rotation groove 14D by the coil spring 19, so that rattling is prevented. Additionally, this coil spring 19 provides an appropriate operating force for operation, but especially in the case of the door stopper 13, the above operating force may force something other than a tool, such as a finger, into the inner diameter of the ring cap 22. This prevents it from being easily rotated.

In addition, in the door stop device 13, 113, the bearing 1
4. Although the operating shaft 16 has been shown to have a partially different configuration and is used interchangeably, it may also be the same product. That is, the vertical groove 14E and square hole 14F of the bearing 14
The vertical groove 16F, the protrusion 16G, and the narrow groove 16H of the operating shaft 16 may all be provided on the same bearing and operating shaft. Therefore, by simply selecting only the handle 21 and ring cap 22 to be used for final assembly, it is possible to easily handle the manual operation and tool operation.

<Effects of the Invention> As explained above, according to the present invention, the operation axis,
The assembly with the latch built into the bearing can be inserted from the back side of the door and fixed on the front side of the door.
The assembly work to the door can be made easy and work efficiency can be improved.A ring cap is provided on the door side end of the bearing so that the tip of the operating shaft faces outward, and the tip of the operating shaft can be attached with a tool. By making the structure rotatable, it is possible to prevent the door from being opened inadvertently, thereby increasing safety.

In addition, the handle and ring cap can be selectively attached to the tip of the operating shaft and the end protruding from the door opening of the bearing, respectively, so there are two types: manually operated type and tool-operated type. It can be easily changed to the type you want to operate.

Furthermore, the handle of the operating shaft is formed separately from the operating shaft, and the overhang provided on the handle covers the bearing end on the door surface side and the tightening nut, so that the surface of the bearing In addition to reducing processing costs, the handle can be made of synthetic resin.
It also has the advantage of being superior in terms of design.

Further, according to the present invention, by applying an appropriate elastic force to the latch and the operating shaft, it is possible to prevent the operating shaft and the latch from rattling and to prevent noise.

[Brief explanation of drawings]

Fig. 1 is a horizontal cross-sectional view of a partially broken main part of a conventional door stop device, Fig. 2 is a cross-sectional view taken along the - arrow in Fig. 1,
3 is a partially broken horizontal sectional view of a main part showing a manually operated embodiment of the door stop device according to the present invention, FIG. 4 is a sectional view taken along the - arrow in FIG. 3, and FIG.
FIG. 6 is an exploded perspective view of the embodiment shown in FIG. 6. FIG. 6 is a horizontal cross-sectional view of essential parts showing a tool-operated embodiment of the door stop device according to the present invention. FIG. 7 is an exploded perspective view of the embodiment shown in FIG. be. 2...Door, 2A...Opening, 13,113...
Door stop device, 14...bearing, 14D...rotation groove,
15...Tightening nut, 16...Operation shaft, 16A...
... Tip prismatic part, 16B... Large diameter part, 16C... Medium diameter part, 16D... Small prismatic part, 16E... Small diameter part,
16H... Thin groove, 17... Latch, 19... Coil spring, 20... Handle, 21D... Engaging leg,
22...Ring cap, 22D...Engaging leg.

Claims (1)

[Scope of Claims] 1. An operating shaft rotatably supported via a bearing on the door side provided in the opening, and an operating shaft that is attached to the operating shaft and is rotated by the rotation of the shaft. A door locking device having a latch that engages and disengages from a locking part, wherein the bearing is fitted into the opening of the door from the back side of the door, and a tightening nut fitted from the front side of the door to the outer periphery of one end of the door. A groove is provided on the tip end surface of the operating shaft facing outward from the door side opening into which a tool for operating the operating shaft is inserted, and an end of the bearing protruding from the door opening is provided. 1. A door stop device, characterized in that a ring cap is attached to the ring cap, the ring cap having an opening through which the groove of the operating shaft faces and a projecting portion that covers the tightening nut portion. 2. The door stop device according to claim 1, wherein the latch is rotatably disposed in a rotation groove provided along the inner bottom of the bearing. 3. A pair of engaging legs are formed on the back surface of the ring cap, and the ring cap is installed by elastically engaging with a recess provided in the inner diameter of the bearing. Door stop device. 4. The door stop device according to any one of claims 1 to 3, wherein the tip of the operating shaft is located at a position recessed from the surface of the ring cap. 5 An operating shaft that is rotatably supported via a bearing on the door side provided in the opening, and an operating shaft that is attached to the operating shaft and that is attached to and disengages from the locking portion on the opening side by rotation of the shaft. In the door locking device, the bearing is tightened and fixed to the door by a tightening nut fitted from the front side of the door to the outer periphery of one end inserted into the opening of the door from the back side of the door. A groove is provided on the tip end surface of the operating shaft facing outward from the door side opening into which a tool for operating the operating shaft is inserted. Equipped with a handle that can be operated from the front side, a ring cap having an opening where the groove faces, an overhanging part that covers the tightening nut part, and an attachment part to the end of the bearing protruding from the door opening. , A door stop device characterized in that the handle and the ring cap are selectively attached. 6 A pair of vertical grooves with internal protrusions are formed on the outer periphery of the operating shaft, and a pair of engaging legs corresponding to the vertical grooves are formed on the back surface of the handle, so that the handle can be elastically operated. 6. The door stop device according to claim 5, wherein the door stop device is mounted on a shaft. 7. An operating shaft rotatably supported via a bearing on the door side provided in the opening, and a latch that engages and disengages from the locking portion on the opening side by rotation of the operating shaft;
In the door stop device, the bearing is configured to be tightened and fixed to the door by a tightening nut that is fitted from the front side of the door to the outer periphery of one end that is inserted into the opening of the door from the back side of the door, and A door stop device characterized in that a protruding portion extending to cover the tightening nut is provided at the base of the operating handle attached to the end of the operating shaft. 8 An operating shaft rotatably supported via a bearing on the door side provided in the opening, and an operating shaft that is attached to the operating shaft and is engaged with and disengaged from the locking portion on the opening side by rotation of the shaft. The door locking device has a latch that is configured to tighten and fix the bearing to the door by a tightening nut fitted from the front side of the door to the outer periphery of one end that is inserted into the opening of the door from the back side of the door. , a groove is provided on the tip end surface of the operating shaft facing outward from the door-side opening into which a tool for operating the operating shaft is inserted, and a groove is provided for inserting the operating tool into the tip end of the operating shaft, and the operating shaft is attached to the door surface. Equipped with a handle that can be operated from the side, a ring cap having an opening through which the groove faces, an overhanging part that covers the tightening nut part, and an attachment part to the end of the bearing protruding from the door opening, The handle and the ring cap are selected and attached, and the latch is placed between the operating shaft and a latch rotatably disposed inside the bearing, and the latch is constantly biased in the axial direction and pressed against the inner surface of the bearing. A door stop device characterized by having an elastic member interposed therein. 9 The operating shaft has a prismatic tip portion into which the handle fits, a large diameter portion that contacts the inner diameter of the bearing, a medium diameter portion, a small prismatic portion into which the latch fits, and the bottom surface of the bearing to prevent it from coming off. 9. The door stop device according to claim 8, wherein the elastic member comprises a coil spring compressed and mounted between the large diameter portion and the latch.