JPH01260184A - Door latch device - Google Patents

Abstract

PURPOSE:To improve durability, by molding a latch fitted inside a door, and a handle fitted outside the door, with hard synthetic resin, and by molding the grip section of the handle and the knob section of the latch, with soft synthetic resin. CONSTITUTION:The latch bar 1 of a latch A, a latch holder 3, a latch bearing 4, and the display board 5 of a handle B are molded with the hard synthetic resin of the high rigidity of polycarbonate or the like. The knob section 2 of the latch bar 1 and the grip section 22 of a handle main-body 21 are molded with the soft synthetic resin of vinyl chloride resin or the like including antimicrobial agent and antistatic agent, or synthetic rubber. Then, the handle main-body 21, a display device 6, and a door stop section 23 are integrally molded with the hard synthetic resin at the time of molding.

Description

[Detailed description of the invention] [Industrial application field]

The present invention mainly relates to a door latch device most suitable for attachment to the door of a toilet booth, and particularly to a door latch device in which a handle is provided on the outside of the door.

[Conventional technology]

Conventionally, door latch devices installed on the outward-opening doors of restroom booths, which are frequently used and frequently cleaned, have a latch rod slidably attached to the inside of the door, and the end of the latch rod attached to a fixed panel. A latch configured to be able to engage and detach from a latch receiver attached to the latch, and a display plate connected to the latch bar and arranged on the outside of the door slidably configured to indicate that the door is locked. The above-mentioned indicator, a handle for opening the door outward, and a doorstop for closing the door were installed on the outside of the door.

[Problems to be solved by the invention]

However, in conventional door latch devices, main parts such as the latch, handle, indicator, and door stop were each made of metal, so in consideration of their workability, these parts were constructed separately. Each was individually screwed to the door. Therefore, the number of parts and the number of assembly steps for the door latch device are increased, resulting in high costs. In addition, each of the above-mentioned parts has the problem of being made of metal, which carries a heavy weight, and the parts where they are attached corrode due to humidity and water, causing the entire part to loosen and wobble, and the lock to be insufficient. Not only does it feel uncomfortable when sliding the handle or latch with your fingers, but it also makes a harsh and unpleasant metallic sound every time you move the latch. There was a danger that the parts could come into direct contact with the human body. Therefore, the present invention provides a door latch that reduces the weight of the entire door latch device, improves corrosion resistance, absorbs various shocks caused by opening and closing the door, and can be firmly installed for a long period of time.The number of parts and assembly man-hours can also be significantly reduced. The purpose is to provide equipment.

[Means to solve the problem]

In order to achieve the above object, the door latch device of the present invention has a latch attached to the inside of the door and a handle attached to the outside of the door, which are molded from a highly rigid hard synthetic resin.
Further, the grip portion of the handle and the knob portion of the latch are molded from a soft synthetic resin, and the handle body, the display device, and the door stop portion are formed into a body during molding.

[For production]

In the door latch device configured as described above, the latch and handle are made of hard synthetic resin with high rigidity, so the weight is greatly reduced compared to those made of metal, and the corrosion resistance is improved. The latch bar and display plate slide easily without making any harsh or unpleasant metallic sounds, and the handle grip and latch bar knob are made of soft synthetic resin or synthetic rubber. The latch and handle feel much softer when you pinch them with your fingers compared to hard metal ones, and the impact force that accompanies opening and closing of the door is absorbed, increasing the durability of the entire door latch device. Furthermore, the handle is made of three parts: the handle body, the display, and the doorstop part, which are integrated with hard synthetic resin, so the number of these three parts is 1/1 that of the conventional one.
3, which not only reduces the weight but also occupies an extremely small proportion of the door, eliminates the danger of human collisions, improves the aesthetics, and simplifies the installation work.

【Example】

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a door latch device in which the present invention is applied to a door of a toilet booth will be described below with reference to the drawings. First, FIG. 5 shows an exploded view of the entire door latch device, showing a latch A consisting of a latch rod L, a knob portion 2 of the latch rod L, a latch holder 3, and a latch receiver 4. , a display board 5, a display 6, a handle body 21, and a handle B consisting of a grip part 22 and a doorstop part 23 of the handle body 21. The latch rod 1 of the latch A, the latch holder 3, the latch receiver 4, and the display plate 5 of the handle B are made of engineering plastic, which is a hard synthetic resin with high rigidity, such as polycarbonate. In particular, the handle body 21 constituting the handle B and the display 6
The three parts of the doorstop part 23 are integrally molded from an engineering plastic such as a hard synthetic resin such as polycarbonate as described above, and these three parts are constituted as one part. Furthermore, the knob portion 2 of the latch bar 1 and the grip portion 22 of the handle body 21 are made of a soft synthetic resin such as vinyl chloride resin containing an antibacterial agent and an antistatic agent, or synthetic rubber. In this example, polycarbonate was selected as the highly rigid synthetic resin used for each of the above components in consideration of its rigidity and surface treatment, but other than engineering plastics such as polyacetal and nylon, A
A general-purpose resin such as BS resin mixed with glass fiber is used. In FIG. 1, the door 8 of the toilet booth is of an outward-opening type, and the door 8 is opened and closed in one direction of arrows a and a with respect to a fixed panel 9 around a hinge (not shown). Next, details of the door latch device will be explained with reference to FIGS. 1 to 5. First, the latch holder 3 that constitutes the latch A attached to the inside 8a of the door 8 has a pair of holding pieces 3b at both ends of a base 3a. 3c are integrally protruded to form a substantially U-shape in plan view, and the pair of holding pieces 3b and 3c are provided with substantially semicylindrical through holes 3d, as shown in FIG. It is being This latch holder 3 is screwed to the inner side 8a of the door 8 by a pair of screws 11 at a stepped mounting portion 3a formed on the base 3a. Furthermore, the latch receiver 4 has a holding piece 4b integrally protruding from one end of the base 4a, and is formed in a cross-shaped shape in plan view.
A semicylindrical through hole 4c corresponding to c is provided. This latch receiver 4 is also screwed to the inner side 9a of the fixed panel 9 by a pair of screws 12 at the stepped mounting portion 4a- of the base 4a. The cross-sectional shape of the latch rod l held by the latch holder 3 is formed into a substantially semi-cylindrical shape corresponding to the through holes 3d and 4c of the holding pieces 3b, 3c and 4b, and is formed at both ends in the axial direction. A recess IC of a predetermined length is provided on the outer periphery of the approximately central portion between the insertion portions 1a and lb. This latch rod l has insertion portions 1a and lb on both ends thereof.
are a pair of through holes 3d formed at both ends of the latch holder 3.
The latch holder 3 is inserted into the latch holder 3 and held slidably in one direction indicated by the arrows S and B, which is the axial direction. In addition, both ends of the latch holder 3 and the through hole 3d of the latch receiver 4 are inserted into and removed from the insertion portions 1a and lb of the latch rod l.
, 4c are formed with tubular bushings 3e and 4d made of hard synthetic resin with excellent lubricity such as polyacetal to make the contact surfaces with the insertion parts la and lb smooth and prevent wear. are doing. The knob part 2 has a length equal to the length of the concave part 1c of the Rarichi rod l, has a substantially U-shaped cross section, has both end edges 2a bent inward, and has many anti-slip surfaces on its surface. A concavo-convex strip 2b is formed. The knob portion 2 is wrapped around the concave portion 1c of the latch bar l, and its both ends are engaged with the back side of the latch bar l, and the inner surface of the knob portion 2 is wrapped around the concave portion 1c of the latch bar l. It is glued inside 1c. Furthermore, by forming the thickness of the knob part 2 to be slightly thicker than the depth of the recessed part 1c, the surface of the knob part 2 is attached so as to protrude outward from the outer periphery of the latch bar 1. By using the abutment surfaces 2c and 2d that also serve as sliding stoppers, the abutment surfaces 2c and 2d, which are both end surfaces in the length direction of the knob portion 2, 2d are alternately collided with the opposing side surfaces of the pair of holding pieces 3b and 3c of the latch holder 3. In the display board 5 constituting the handle B attached to the outside 8b of the door 8, a foot part 5b is integrally molded on the back surface of a plate-shaped display part 5a. This display board 5 is located on the outside 8b of the door 8.
The foot portion 5b is inserted into the long hole 14 formed in the door 8 and the long hole 13 formed in the stepped mounting portion 31' of the latch holder 3, and the tip of the foot portion 5b is Screw 15 inserted approximately in the center of the latch rod l in the axial direction
It is screwed at right angles. Note that the above-mentioned knob portion 2 covers the head of a screw 15 for fixing the latch rod l and the display plate 5. The handle body 21, which constitutes the handle B and is disposed on the outside 8b of the door 8, has a substantially semicylindrical cross-sectional shape similar to the latch rod L, and has a predetermined length on its outer periphery. A recess 21a formed in a substantially U-shape and a pair of grooves 21b deeply cut into the open end of the U-shape are provided. Furthermore, the grip part 22 has a length equal to the length of the recess 21a of the handle body 21, and its cross-sectional shape is formed into a substantially U-shape. A large number of grooves 22b are provided. Then, the knob 22 is wrapped around and fitted into the recess 21a of the handle body 21, and both end edges 22a are locked in the pair of grooves 21b, so that the knob 22 is wrapped around the recess 21a.
It is glued inside a.゛Furthermore, on one side of the handle main body 21, an indicator 6 incorporating the above-mentioned display board 5 is integrally molded, and on the other side of the handle main body 21, a door stop part 23 is integrally molded. There is. A recess 6 on the back side of the display 6 is used for sliding the display section 5a of the display board 5.
A display window 6b is provided at approximately the center of the recess 6a, passing through the front and back sides of the display 6 to identify the display plate 5 that indicates the sliding state of the latch rod l. . Further, a door stop rubber 24 for cushioning the fixed panel 9 is bonded to the tip of the door stop portion 23. Three foot portions 21c integrally molded on the back surface of the handle body 21 are inserted into the door 8 from the outside 8b, and the three set screws 11 inserted from the latch holder 3 are inserted at the tips of these foot portions 21c. It is screwed on. Therefore,
The handle body 21, the indicator 6, and the doorstop part 23 constituting the handle B are attached as one part to the outside 8b of the door 8 in a state collinear with the latch holder 3 by three setscrews 11, A display section 5a of the display board 5 is housed in a recess 6a of the display 6 so as to be slidable in one direction indicated by arrows (a) and (b). Furthermore, anti-slip sheets 16 made of a rubber plate or the like are adhered to a pair of sliding surfaces 1d which are the back surfaces of the insertion parts 1a and 1b of the latch bar 1, and these anti-slip sheets 16 are attached to the latch holder 3. Flat surface 3 of a pair of through holes 3d
The latch rod 1 is configured to contact d' to prevent excessive sliding of the latch rod 1, and to prevent it from sliding unnecessarily. Furthermore, the surface of the step-like mounting portion 3a- of the base 3a to which the screw 11 for fixing the latch holder 3 is attached, and the surface of the step-like attachment portion 4a- of the base 4a to which the screw 12 for fixing the latch receiver 4 is attached. A screw cap 18.19 made of ABS resin or the like is placed on the screw cap 11.12 to cover the screw 11.12. In this way, the screws for fixing the handle B to the outside 8b of the door 8 are not required, and the screws 1 for fixing the latch holder 3, latch receiver 4, and indicator 6 that constitute the latch A are not required.
1.12 is formed on the stepped mounting portions 3a-, 42L-,
Since their heads do not protrude upward and are covered with screw caps 18 and 19, the screws 11 and 12 are not exposed on the surface of the door 8 or fixed panel 9, which can cause corrosion. This prevents water from entering the mounting area and improves the aesthetic appearance of the toilet booth. According to the door latch device configured as described above, the first
As shown in the figure, after opening the door 8 by grasping the grip part 22 of the handle B, move the door 8 in the direction of arrow Y until the door stop part 23 collides with the fixed panel 9 in a cushioning manner by the door stop rubber 24. Rotate to close the door. Next, pinch the flexible knob part 2 made of soft synthetic resin or synthetic rubber with your fingers, and slide the latch bar l in the direction of the arrow to insert the latch bar l into the insertion part 1a.
is inserted into the through hole 4c of the latch receiver 4 and engaged, and the door 8 is locked from the inside. At this time, the display part 5a of the display board 5 is slid together with the latch bar 1 in the direction of the arrow mark within the recess 6a of the display 6, and the contact surface 2c of the knob part 2 is pressed against one of the holding pieces 3b of the latch holder 3. When the latch bar 1 is abutted and stopped, at the same time, the display window 6b of the display 6 displays the red color of the display section 5a to indicate the locked state of the door 8. If the latch bar 1 is slid in the direction of arrow b' and the insertion part 1a is pulled out from the through hole 4C of the latch receiver 4, the door 8 will be unlocked and the contact surface on the opposite side of the knob part 2 will be unlocked. 2d
At the same time when the latch holder 3 is brought into contact with the other holding piece 3C of the latch holder 3, the blue color of the display part 5a is displayed on the display window 6b of the display 6, and the unlocked state of the door 8 is displayed. Furthermore, when the door 8 is opened and closed relatively violently in one direction of arrows a and a, the centrifugal force at that time automatically applies a sliding force in the direction of the arrow to the latch rod l.
Since the anti-slip sheet 16 formed on the latch holder 3 is in contact with the flat surfaces 3d- of the pair of through holes 3d of the latch holder 3, the latch rod 1 will not be slid in the direction of the arrow mark. Furthermore, the soft synthetic resin and synthetic rubber that form the grip part 22 and the knob part 2 contain antibacterial agents and antistatic agents during molding, so they themselves prevent the attachment of various germs and are hygienic. In addition to being a target, the grip part 2 is not charged with static electricity.
2 and the knob part 2 can be pinched with confidence. The opening and closing operations of the door 8 in one direction of the arrows a and a are performed by grasping the grip portion 22 of the handle body 21, but this grip portion 22 is made of soft synthetic resin or rubber and is soft.
This grip part 22 feels good when you pinch it. Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various effective changes can be made based on the technical idea of the present invention.

【Effect of the invention】

Since the present invention is configured as described above, it produces the effects described below. In the door latch device of the present invention, the three components of the handle, the handle body, the display, and the door stop portion, are integrally formed of a highly rigid hard synthetic resin, and are integrated into one component. As a result, the above three parts can be molded in one molding process, and in addition to facilitating the processability,
Two parts can be attached to the door in one installation in a few man-hours. Therefore, the number of parts and assembly man-hours can be reduced to 1
The cost can be reduced to about /3, resulting in significant cost reduction. Moreover, by forming the handle body, display, and doorstop part in one piece, the weight of each part is reduced and they are mutually reinforced, making the strength of these three parts much greater than that of conventional single parts. Compared to other materials, it increases in size and does not corrode due to moisture or moisture, improving its durability. Furthermore, because each part that was previously formed and attached was integrated into one, the proportion of parts that make up the door has become extremely small, and by making it from synthetic resin, there is less risk of injury due to collisions. You can also improve the aesthetics of your toilet stall.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view of a door latch device showing an embodiment of the present invention, Fig. 2 is a sectional view taken along line ■-■ in Fig. 1, and Fig. 3 is a sectional view taken along line III-I in Fig. 1. Cross-sectional view, Figure 4 is the first
FIG. 5 is a sectional view taken along line IV-IV in the figure, and an exploded perspective view. A: Latch B: Handle
... Latch rod la, lb ... Latch rod insertion part 2 ... Latch rod knob part 3 ... Latch holder 4 ...
・Latch receiver 5...Display board 6...
・Indicator 8...Door 8a...
・Inside the door 8b...Outside the door 9・
... Fixed panel 21 ... Handle body 22 ... Grip part of the handle body 23 ... Door stop part Fig. 1

Claims (1)

[Claims] A latch is configured such that a latch bar is slidably held in the axial direction by a latch holder attached to the inside of the door, and the insertion portion of the latch bar is engaged with and detachable from a latch receiver attached to the inside of a fixed panel. On one side of the handle body that is attached to the outside of the door, there is a display that is continuous with the latch bar and slides together to indicate whether the door is locked, and on the other side there is The door stop portion that abuts on the outside of the fixed panel is comprised of a handle that is integrally molded, the latch and the handle are made of a rigid synthetic resin, and the knob portion of the latch bar and the handle body are formed of a rigid synthetic resin. A door latch device characterized in that a grip portion of the door latch is made of soft synthetic resin or synthetic rubber.