EP0412632A1 - Latch holding apparatus of handle for opening and closing door - Google Patents
Latch holding apparatus of handle for opening and closing door Download PDFInfo
- Publication number
- EP0412632A1 EP0412632A1 EP90303488A EP90303488A EP0412632A1 EP 0412632 A1 EP0412632 A1 EP 0412632A1 EP 90303488 A EP90303488 A EP 90303488A EP 90303488 A EP90303488 A EP 90303488A EP 0412632 A1 EP0412632 A1 EP 0412632A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- latch
- handle
- base
- pivot shaft
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B13/00—Devices preventing the key or the handle or both from being used
- E05B13/002—Devices preventing the key or the handle or both from being used locking the handle
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
- E05B15/04—Spring arrangements in locks
- E05B2015/0493—Overcenter springs
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B83/00—Vehicle locks specially adapted for particular types of wing or vehicle
- E05B83/02—Locks for railway freight-cars, freight containers or the like; Locks for the cargo compartments of commercial lorries, trucks or vans
- E05B83/08—Locks for railway freight-cars, freight containers or the like; Locks for the cargo compartments of commercial lorries, trucks or vans with elongated bars for actuating the fastening means
- E05B83/10—Rotary bars
Definitions
- This invention relates to a latch holding apparatus of a handle for opening and closing a door, in which the handle is placed in a locked state by holding a latch in a locked position. More particularly, the invention relates to a latch holding apparatus used in a double-leafed hinged door attached to the rear or side of, e.g., a van-type vehicle, and adapted in such a manner that when a handle to be locked is placed in a locked state or unlocked state, the latch can be held reliably in a locked position or unlocked position, respectively.
- numeral 1 denotes a double-leafed hinged door attached to an opening at the rear or side of a van-type vehicle V or sea-borne container.
- the double-leafed hinged door 1 is mounted by hinges 2 on a side column 3 of the opening.
- Numeral 4 denotes a locking rod constituting a lock device.
- the rod 4 has cams 5 at its upper and lower ends and is mounted on the main body of the door 1 so as to be capable of turning.
- a handle 6 for turning the locking rod 4 about its axis is provided on the rod 4 as a integral part thereof.
- Numeral 7 denotes a cam keeper provided on upper and lower frame members of the opening.
- Numeral 8 denotes a latch apparatus for retaining the handle 6, which turns in unison with the locking rod 4, in a horizontal attitude, and for locking the handle 6 at the time of a closing operation.
- Fig. 16 which is a perspective view of the portion indicated by the arrow XXIV in Fig. 15, shows the details of the latch apparatus and handle 6.
- the handle 6 is engaged with and supported by a bracket 9 fixedly secured to the double-leafed hinged door.
- a door lock latch 10 capable of being turned up and down has a simple structure in which the latch 10 is engaged with the handle 6 from above to prevent the handle 6 from separating from the bracket 9.
- Numeral 11 denotes concentric holes provided in the bracket 9 and latch 10. Locking is achieved by inserting the shank of a padlock 12 through the holes 11. The handle cannot be turned unless the padlock 12 is opened.
- the conventional latch apparatus 8 thus constructed involves a troublesome opening and closing operation since the latch is held by the padlock 12. Specifically, in terms of the operation performed at unlocking,
- a biasing apparatus is known as a latch holding apparatus for holding the latch reliably in its locked position or unlocked position.
- the biasing apparatus uses a spring which applies a force in mutually opposing directions in such a manner that the locked position and unlocked position of the locking latch member can be reliably maintained.
- numeral 71 denotes a biased body moved between the position of a pin a and the position of a pin b.
- the biased body is a latch member for locking the handle of a van-type vehicle, by way of example.
- the biased body 71 turns about a pivot shaft 72 to be changed over between the position of pin a and the position of pin b.
- Numeral 73 denotes a coil spring having one end engaged with a pin 74 provided on an end of the biased body 71, and another end engaged with a fixed pin 75 separate from the biased body 71.
- a force is applied in the direction of arrow A in order to change over the biased body 71 from the position of pin a in Fig. 17(a) to the position of pin b in Fig. 17(b).
- the coil spring 73a stretches to a point beyond a straight line X-X′ passing through the pivot shaft 72, namely a point beyond a neutral position. Therefore, the biased body is turned against the spring force, though when the straight line X-X′ is surpassed, the biased body is turned automatically to the position b, where it comes to rest.
- the coil spring 73a causes the spring force to act upon the biased body 71 between the pins 74 and 75, thereby producing a moment in a direction where the force attempts to turn the biased body further. As a result, the biased body 71 is held at the position b.
- Figs. 18(a), (b) shows another example of the biasing device.
- a leaf spring 73b is used as the spring which applies the spring force to the biased body 71. If the biased body 71 is pushed against a maximum repulsive force, produced when it passes over a central projection 76b of the leaf spring 73b, at such time that the biased body 71 is moved from the a position to the b position, the biased body 71 will turn automatically and be held at the b position.
- Figs. 19(a) (b) also show another example of the biasing device.
- the arrangement used is one in which one end of a torsion coil spring 73c is engaged with a pin 77 provided on the lower portion of the biased body 71. Operation is the same as in the foregoing two examples, with the biased body being held at the a and b positions by the coil spring 73c.
- Figs. 20(a) (b) show yet another example of the biasing device.
- a spring seating member 80 is attached to the lower portion of the biased body 71 via a pin 78, and a spring seating member 81 is attached via a pin 79 to a fixed position separate from the biased body 71.
- a coil spring 73d is attached between the two spring seating members 80, 81. Accordingly, when the biased body is in line with the neutral line X-X′, the coil spring 73 is compressed to the maximum extent, whereby the maximum spring force is generated. When this neutral position is exceeded, the biased body is turned automatically toward the b position or the a position, where it comes to rest.
- spring lengths l1, l2 in the examples of Figs. 17 and 20 are of considerable size in a case where a prescribed biasing force is required.
- the width l3 of the leaf spring 73b is large.
- the length and width of the coil spring 73c are of considerable size.
- the present invention has been devised in order to solve the foregoing problems and its object is to provide a latch holding apparatus of a handle for opening and closing a door used very frequently, in which a latch member can be held in its locked and unlocked positions reliably and the handle can be locked and unlocked by a single touch.
- Another object of the present invention is to provide a safely operable latch holding apparatus of a handle for opening and closing a door, in which the apparatus can be attached at a hidden position of a latch device or the like for locking the handle, and in which the positioning of a held latch can be performed in reliable fashion.
- a latch holding apparatus of a handle for opening and closing a door in which a latch pivotally secured to a base fixed to a door main body is held in a locked position, whereby the handle is placed in a locked state
- the apparatus comprising a pair of handle grips in each of which a recess is formed for insertion of the handle, a pivot shaft for turnably supporting the latch on the handle grips, and holding means for holding the latch in the locked position when the handle is inserted into the handle grips, and turning the latch and holding it in an unlocked position when the handle is separated from the handle grips.
- the latch holding apparatus of a handle for opening and closing a door in the present invention is such that the latch member is pivotally secured to the base and is capable of being held in its open and closed positions by a simply constructed holding device.
- the invention therefore is very effective when utilized in a collection and delivery vehicle for parcels and the like, in which a door is opened and closed very frequently.
- the holding apparatus is such that when the handle is manipulated in a state where the latch member is in the open position, the latch can be held in the open position automatically. Conversely, the latch member can readily be turned to the open position by hand, whereupon it can be held in this position immediately. Therefore, the apparatus is convenient in that it can be operated very easily even by an operator busily involved in collection and delivery.
- the basic structural elements of an apparatus according to a first embodiment of the invention illustrated by Figs. 1 through 4 are four members, namely a base 20, a latch member 30 which operates in cooperation with the base 20, and a holding device 40 for holding the latch member 30 in a closed position.
- Fig. 3 is a sectional view showing a principal portion of the latch holding apparatus.
- the base 20 is fixedly secured to, e.g., the main body of a double-leafed hinged door 1, by a bolt 22 inserted from the inner side of the main body of the door 1 and passed through the handle 6 at a prescribed position. Tightening is accomplished by a nut 23.
- the base 20 is rectangular in shape and is provided with a bolt-insertion hole 21 at each of the four corners of the rectangle, as shown in Fig. 4.
- a pair of left and right handle grips 24 are provided on the top side of the base 20.
- the handle grips 24 project upwardly by a distance t from the base 20 in such a manner that the handle 6 can be inserted from above.
- a recess 24a for inserting the handle is formed between the handle grips 24 and the base 20.
- Fig. 2 is a perspective view of the latch member.
- the latch member 30 has a transverse dimension that allows it to fit between the pair of left and right handle grips 24, and is attached to the handle grips 24 by a pivot shaft 25.
- the upper portion of the latch member protrudes upward from the handle grips 24 and has an inwardly directed projection 31 forming a C-shaped recess 32.
- the handle grips 24 are provided with respective holes 25a for attaching the pivot shaft 25, which is attached to the latch member 30 substantially at the central portion thereof.
- the latch member 30 turns up and down with the pivot shaft 25 serving as the center of turning motion.
- the lower portion of the latch member 30 has the shape of a downwardly directed wedge.
- the holding device 40 is attached to the latch member 30 at a portion thereof below the position of the pivot shaft 25.
- a hole 42 for mounting the holding device is provided in the lower portion of the latch member 30 below the hole for the pivot shaft 25 serving as the center of turning motion.
- pins 41 having a hemispherical shape and constituting the holding device 40.
- the pins 41 are urged outwardly by a compression spring 43 in such a manner that the heads of the pins are fitted alternately into two recesses 41a, 41b provided in each of the handle grips 24 on the inner side thereof below the hole 25a. More specifically, the two recesses 41a, 41b are spaced apart by about 20° and have the same radii with the hole 25a as center.
- the locking device holds the latch member 30 in the locked position (the position of the solid lines in Fig. 1) or in the unlocked position (the position of the phantom lines in Fig. 1) after the latch is turned.
- the latch member 30 turns in the locking direction (clockwise in Fig. 1).
- the holding device 40 also turns so that the pins 41 fit into the recesses 41a, which is on the side of the locking position of the latch member 30. The holding device holds the latch member 30 is this position.
- the latch holding apparatus of this embodiment includes the base 20 and the latch member 30, which cooperates with the base 20, as basic structural elements.
- the holding device for holding the latch member 30 in its locked position has a construction described below.
- Fig. 6 is an enlarged sectional view showing the state of the locking device holding the latch member 30 in the locked position.
- the holding device comprises two projections 33a, 33b provided on the latch at positions below the pivot shaft 25 on the inner side of the latch, and a leaf spring 44 provided astride a recess 46 formed in the base.
- the two projections 33a, 33b are situated on the latch member 30 within a radius R at a position below the pivot shaft 25.
- the leaf spring 44 is secured to the base 20 by fixtures 45 and is formed to have two projections 44a, 44b corresponding to the projections 33a, 33b. The arrangement is such that when the latch member 30 turns, the leaf spring 44 is capable of flexing without effort.
- the lower portion of the latch member 30 is urged in the direction of arrow a in Fig. 5.
- the projection 33b on the lower side of the latch member 30 is turned upward, slides over the projection 44b on the lower side of the leaf spring 44 and fits into the recess 44c.
- the latch member 30 is held in its unlocked position (the position indicated by the two-dot chain lines in Fig. 5).
- magnets 46a and 46b are imbedded in upper and lower portions of the base 20.
- the magnet 46a corresponds to the inwardly directed projection 31 provided on the upper portion of the latch member 30, which is made of metal.
- the magnet 46b is provided to correspond to the wedge-shaped portion at the lower part of the latch member 30. It goes without saying that the magnets 46a, 46b may be provided on the latch member 30 rather than the base 20.
- the inwardly directed projection 31 is magnetically attracted to the magnet 46a with the latch member 30 in the locked position, which is indicated by the solid line in Fig. 8. This position is maintained as a result of the attraction between the projection 31 and the magnet 46a.
- the latch holding apparatus of this embodiment includes the base 20 and the latch member 30, which cooperates with the base 20, as basic structural elements.
- the holding device for holding the latch member 30 in its locked position employs a biasing device using a spring applying a biasing force in mutually opposing directions in such a manner that the latch member for locking can be held reliably in its locked and unlocked positions.
- Fig. 10 is a sectional view showing a biasing device according to this embodiment.
- a biased body 53 urged in a positioning direction is a latch member capable of being turned between pins a and b about a pivot shaft 54.
- Numeral 55 denotes a pin having a hemispherical head for supporting the upper portion of the biasing device 52.
- the pin 55 is fixedly secured to a portion of the biased body 53 below the pivot shaft 54.
- Numeral 56 denotes a pin having a hemispherical head for supporting the lower portion of the biasing device 52.
- the pin 56 is attached to a fixed base 57.
- Fig. 11 is a sectional view illustrating a pin seat constituting the biasing device.
- the pin seat 58 has a bowl-shaped recess 59 provided in one end thereof in the axial direction. This end of each pin seat is formed to have a spring seating flange 60 surrounding the recess 59.
- the pin seats 58 are installed end to end with their recessed portions facing away from each other, and heads 55a, 56a of the pins 55, 56 are fitted into the recesses 59 of the pin seats.
- Numeral 61 denotes a spring loaded between the spring seating flanges 60 of the upper and lower pin seats 58.
- the biasing device 52 is such that when the center of the upper pin 55 is at a position O1 to the left of a straight line X-X′ connecting the center of the head portion of pin 56 and the center O of the pivot shaft 54 serving as the rotational center of the biased body 53, the biased body 53 is biased in the locking direction or unlocking direction.
- the biased body 53 is biased conversely in the locking direction or unlocking direction.
- the biasing device 52 is characterized in that it operates in an effective manner even if a distance E between the center O3 of the pin 56 and the rotational center (pivot shaft) O of the biasing body 53 is very small.
- the biased body 53 is restrained and positioned by the pin a in the state shown in Fig. 10.
- the biased body 53 rotates about the pivot shaft 54.
- the pin 55 turns at the same time and so does the pin seat 58 while the bowl-shaped recess 59 is in contact with the tip of the pin.
- the turning motion takes place against the spring force of the coil spring 61 and becomes maximum when the line X-X′ connecting the pivot shaft 54 and pin 56 is surpassed.
- this line is surpassed, the biased body 53 turns under its own force and is positioned at pin b on the opposite side.
- the biasing device 54 of the fourth embodiment can be easily mounted in the small mounting space between the base 57 attached to the door 1 of the van-type vehicle and the latch member, which is the biased body 53, and the biasing device 54 is capable of performing fully the function of a latch holding device.
- Fig. 13 shows another embodiment.
- the pin 55 with the hemispherical head and the pin seat 58 are integrated into a unitary body.
- upper and lower pin seats 58′ have an identical construction, and a pin 55′ and spring seating flange 60′ are formed into a unitary body.
- bowl-shape recesses 59′ are provided on the side of the biased body 53 which is positioned and on the side of the base 57.
- Numeral 68 denotes a coil spring installed between the opposing upper and lower spring seating flanges 60′, 60′.
- Fig. 14 shows a well-known biasing device corresponding to the principle of Fig. 20. This will be compared with the fourth embodiment of the invention shown in Fig. 10.
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- Lock And Its Accessories (AREA)
Abstract
Description
- This invention relates to a latch holding apparatus of a handle for opening and closing a door, in which the handle is placed in a locked state by holding a latch in a locked position. More particularly, the invention relates to a latch holding apparatus used in a double-leafed hinged door attached to the rear or side of, e.g., a van-type vehicle, and adapted in such a manner that when a handle to be locked is placed in a locked state or unlocked state, the latch can be held reliably in a locked position or unlocked position, respectively.
- Conventionally, a latch apparatus for locking a handle which opens and closes a door is used in a double-leafed hinged door of a van-type vehicle or sea-borne container. Prior art disclosed in US Serial No. 19867 filed on March 16, 1970 will now be described with reference to Figs. 15 and 16 as an example of such a latch apparatus.
- First, in Fig. 15,
numeral 1 denotes a double-leafed hinged door attached to an opening at the rear or side of a van-type vehicle V or sea-borne container. The double-leafed hingeddoor 1 is mounted byhinges 2 on aside column 3 of the opening. Numeral 4 denotes a locking rod constituting a lock device. Therod 4 hascams 5 at its upper and lower ends and is mounted on the main body of thedoor 1 so as to be capable of turning. Ahandle 6 for turning thelocking rod 4 about its axis is provided on therod 4 as a integral part thereof. Numeral 7 denotes a cam keeper provided on upper and lower frame members of the opening. The upper andlower cams locking rod 4 turn when thedoor 1 is opened, whereupon the cams engage with theirrespective cam keepers 7. Numeral 8 denotes a latch apparatus for retaining thehandle 6, which turns in unison with thelocking rod 4, in a horizontal attitude, and for locking thehandle 6 at the time of a closing operation. - Fig. 16, which is a perspective view of the portion indicated by the arrow XXIV in Fig. 15, shows the details of the latch apparatus and handle 6. In this conventional latch apparatus, the
handle 6 is engaged with and supported by a bracket 9 fixedly secured to the double-leafed hinged door. A door lock latch 10 capable of being turned up and down has a simple structure in which the latch 10 is engaged with thehandle 6 from above to prevent thehandle 6 from separating from the bracket 9. Numeral 11 denotes concentric holes provided in the bracket 9 and latch 10. Locking is achieved by inserting the shank of apadlock 12 through theholes 11. The handle cannot be turned unless thepadlock 12 is opened. - The conventional latch apparatus 8 thus constructed involves a troublesome opening and closing operation since the latch is held by the
padlock 12. Specifically, in terms of the operation performed at unlocking, - (1) first the
padlock 12 is unlocked by means of a key; - (2) the shank of the
padlock 12 is withdrawn from theconcentric holes 11 of the bracket 9 and door lock latch 10; - (3) the door lock latch 10 is turned clockwise about a
pivot shaft 13; and - (4) the
handle 6 is turned upwardly slightly by hand and pulled forward from the position indicated by the two-dot chain lines to turn thelocking rod 4, thereby opening the door. - Though the double-leafed hinged
door 1 is opened by the series of operations (1) through (4) mentioned above, these operations are difficult to perform when the user is carrying a load, unless the load is first set on the ground. In particular, operations (2) and (4) cannot be carried out with only one hand, and even greater difficulties are encountered in case of rainy weather. - A biasing apparatus is known as a latch holding apparatus for holding the latch reliably in its locked position or unlocked position. For example, in the case of a lock device of a handle for an apparatus which locks a van-type vehicle, the biasing apparatus uses a spring which applies a force in mutually opposing directions in such a manner that the locked position and unlocked position of the locking latch member can be reliably maintained.
- As shown in Fig. 17,
numeral 71 denotes a biased body moved between the position of a pin a and the position of a pin b. The biased body is a latch member for locking the handle of a van-type vehicle, by way of example. Thebiased body 71 turns about apivot shaft 72 to be changed over between the position of pin a and the position of pin b. Numeral 73 denotes a coil spring having one end engaged with apin 74 provided on an end of thebiased body 71, and another end engaged with a fixedpin 75 separate from thebiased body 71. - A force is applied in the direction of arrow A in order to change over the
biased body 71 from the position of pin a in Fig. 17(a) to the position of pin b in Fig. 17(b). When this is done, the coil spring 73a stretches to a point beyond a straight line X-X′ passing through thepivot shaft 72, namely a point beyond a neutral position. Therefore, the biased body is turned against the spring force, though when the straight line X-X′ is surpassed, the biased body is turned automatically to the position b, where it comes to rest. At the position of pin b, the coil spring 73a causes the spring force to act upon thebiased body 71 between thepins biased body 71 is held at the position b. - Figs. 18(a), (b) shows another example of the biasing device. Here a
leaf spring 73b is used as the spring which applies the spring force to thebiased body 71. If thebiased body 71 is pushed against a maximum repulsive force, produced when it passes over a central projection 76b of theleaf spring 73b, at such time that thebiased body 71 is moved from the a position to the b position, thebiased body 71 will turn automatically and be held at the b position. - Figs. 19(a) (b) also show another example of the biasing device. Here the arrangement used is one in which one end of a
torsion coil spring 73c is engaged with apin 77 provided on the lower portion of thebiased body 71. Operation is the same as in the foregoing two examples, with the biased body being held at the a and b positions by thecoil spring 73c. - Figs. 20(a) (b) show yet another example of the biasing device. Here a
spring seating member 80 is attached to the lower portion of thebiased body 71 via apin 78, and aspring seating member 81 is attached via apin 79 to a fixed position separate from thebiased body 71. Acoil spring 73d is attached between the twospring seating members - Among the foregoing well-known biasing devices, spring lengths ℓ₁, ℓ₂ in the examples of Figs. 17 and 20 are of considerable size in a case where a prescribed biasing force is required. In the example of Fig. 18, the width ℓ₃ of the
leaf spring 73b is large. In the example of Fig. 19, the length and width of thecoil spring 73c are of considerable size. For these reasons, problems arise when it is attempted to make the well-known biasing devices smaller in size and more compact. - The present invention has been devised in order to solve the foregoing problems and its object is to provide a latch holding apparatus of a handle for opening and closing a door used very frequently, in which a latch member can be held in its locked and unlocked positions reliably and the handle can be locked and unlocked by a single touch.
- Another object of the present invention is to provide a safely operable latch holding apparatus of a handle for opening and closing a door, in which the apparatus can be attached at a hidden position of a latch device or the like for locking the handle, and in which the positioning of a held latch can be performed in reliable fashion.
- In accordance with the present invention, there is provided a latch holding apparatus of a handle for opening and closing a door, in which a latch pivotally secured to a base fixed to a door main body is held in a locked position, whereby the handle is placed in a locked state, the apparatus comprising a pair of handle grips in each of which a recess is formed for insertion of the handle, a pivot shaft for turnably supporting the latch on the handle grips, and holding means for holding the latch in the locked position when the handle is inserted into the handle grips, and turning the latch and holding it in an unlocked position when the handle is separated from the handle grips.
- Accordingly, the latch holding apparatus of a handle for opening and closing a door in the present invention is such that the latch member is pivotally secured to the base and is capable of being held in its open and closed positions by a simply constructed holding device. The invention therefore is very effective when utilized in a collection and delivery vehicle for parcels and the like, in which a door is opened and closed very frequently.
- In particular, the holding apparatus is such that when the handle is manipulated in a state where the latch member is in the open position, the latch can be held in the open position automatically. Conversely, the latch member can readily be turned to the open position by hand, whereupon it can be held in this position immediately. Therefore, the apparatus is convenient in that it can be operated very easily even by an operator busily involved in collection and delivery.
- Other features and advantages of the present invention will be apparent from the following description taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof.
-
- Figs. 1 through 4 show a first embodiment of the present invention, in which:
- Fig. 1 is a side sectional view;
- Fig. 2 is a perspective view of a latch member;
- Fig. 3 is a sectional view of a holding device; and
- Fig. 4 is a perspective view of a base;
- Figs. 5 through 7 show a second embodiment of the present invention, in which:
- Fig. 5 is a side sectional view;
- Fig. 6 is an enlarged sectional view illustrating the state of the holding device holding a latch in a locked position; and
- Fig. 7 is an enlarged sectional view illustrating the state of the holding device turning the latch and holding it in an unlocked position;
- Figs. 8 and 9 show a third embodiment of the present invention, in which:
- Fig. 8 is a side sectional view, and
- Fig. 9 is a perspective view of a base;
- Figs. 10 through 12 show a fourth embodiment of the present invention, in which:
- Fig. 10 is a sectional view illustrating the state of a biasing device for biasing a latch pivotally secured to a base;
- Fig. 11 is a front view showing a pin seat constituting the biasing device; and
- Fig. 12 is an explanatory view showing the action of the biasing device;
- Fig. 13 is a sectional view showing another biasing device;
- Fig. 14 is a sectional view showing a well-known biasing device;
- Fig. 15 is a front view of a well-known double-leafed hinged door;
- Fig. 16 is a diagram showing the details of a portion indicated at arrow XVI in Fig. 15; and
- Figs. 17 through 20 are explanatory views illustrating biasing devices using well-known springs.
- Embodiments of the present invention will now be described in detail with reference to the drawings.
- The basic structural elements of an apparatus according to a first embodiment of the invention illustrated by Figs. 1 through 4 are four members, namely a
base 20, alatch member 30 which operates in cooperation with thebase 20, and a holdingdevice 40 for holding thelatch member 30 in a closed position. - Fig. 3 is a sectional view showing a principal portion of the latch holding apparatus. As shown in Fig. 1, the
base 20 is fixedly secured to, e.g., the main body of a double-leafed hingeddoor 1, by abolt 22 inserted from the inner side of the main body of thedoor 1 and passed through thehandle 6 at a prescribed position. Tightening is accomplished by anut 23. To this end, thebase 20 is rectangular in shape and is provided with a bolt-insertion hole 21 at each of the four corners of the rectangle, as shown in Fig. 4. - A pair of left and right handle grips 24 are provided on the top side of the
base 20. The handle grips 24 project upwardly by a distance t from the base 20 in such a manner that thehandle 6 can be inserted from above. Arecess 24a for inserting the handle is formed between the handle grips 24 and thebase 20. - Fig. 2 is a perspective view of the latch member. The
latch member 30 has a transverse dimension that allows it to fit between the pair of left and right handle grips 24, and is attached to the handle grips 24 by apivot shaft 25. The upper portion of the latch member protrudes upward from the handle grips 24 and has an inwardly directedprojection 31 forming a C-shapedrecess 32. The handle grips 24 are provided withrespective holes 25a for attaching thepivot shaft 25, which is attached to thelatch member 30 substantially at the central portion thereof. Thelatch member 30 turns up and down with thepivot shaft 25 serving as the center of turning motion. The lower portion of thelatch member 30 has the shape of a downwardly directed wedge. The holdingdevice 40 is attached to thelatch member 30 at a portion thereof below the position of thepivot shaft 25. - The construction of the
latch holding device 40 will now be described in greater detail. Ahole 42 for mounting the holding device is provided in the lower portion of thelatch member 30 below the hole for thepivot shaft 25 serving as the center of turning motion. Fitted into thehole 42 arepins 41 having a hemispherical shape and constituting the holdingdevice 40. When thelatch member 30 is turned, thepins 41 are urged outwardly by acompression spring 43 in such a manner that the heads of the pins are fitted alternately into tworecesses 41a, 41b provided in each of the handle grips 24 on the inner side thereof below thehole 25a. More specifically, the tworecesses 41a, 41b are spaced apart by about 20° and have the same radii with thehole 25a as center. The locking device holds thelatch member 30 in the locked position (the position of the solid lines in Fig. 1) or in the unlocked position (the position of the phantom lines in Fig. 1) after the latch is turned. - Accordingly, in order to turn the
latch member 30, place it in the unlocked position and unlock thehandle 6, the side of thelatch member 30 below thepivot shaft 25 is pressed or the head portion of thelatch member 30 is pulled forward. In a case where thehandle 6 is to be locked, thehandle 6 is swung down from above the latch, whereupon thehandle 6 fits between thelatch member 30 and thebase 20 and strikes a bottom 32a of the C-shapedrecess 32 in thelatch member 30. As a result, thelatch member 30 turns in the locking direction (clockwise in Fig. 1). At this time the holdingdevice 40 also turns so that thepins 41 fit into the recesses 41a, which is on the side of the locking position of thelatch member 30. The holding device holds thelatch member 30 is this position. - A second embodiment of the invention will now be described with reference to Figs. 5 through 7.
- As in the first embodiment described above, the latch holding apparatus of this embodiment includes the
base 20 and thelatch member 30, which cooperates with thebase 20, as basic structural elements. The holding device for holding thelatch member 30 in its locked position has a construction described below. - Fig. 6 is an enlarged sectional view showing the state of the locking device holding the
latch member 30 in the locked position. The holding device comprises twoprojections pivot shaft 25 on the inner side of the latch, and aleaf spring 44 provided astride arecess 46 formed in the base. The twoprojections latch member 30 within a radius R at a position below thepivot shaft 25. Theleaf spring 44 is secured to thebase 20 byfixtures 45 and is formed to have twoprojections 44a, 44b corresponding to theprojections latch member 30 turns, theleaf spring 44 is capable of flexing without effort. - The operation of the latch holding device of a handle for opening and closing a door will now be described. When the locked position is maintained, the
projection 33a on the side of thelatch member 30 fits into therecess 44c of theleaf spring 44, as shown in Fig. 6, and this position is maintained. - Next, in order to establish the unlocked position, the lower portion of the
latch member 30 is urged in the direction of arrow a in Fig. 5. As a result, theprojection 33b on the lower side of thelatch member 30 is turned upward, slides over theprojection 44b on the lower side of theleaf spring 44 and fits into therecess 44c. Thus thelatch member 30 is held in its unlocked position (the position indicated by the two-dot chain lines in Fig. 5). - A third embodiment of the present invention will now be described with reference to Figs. 8 and 9.
- In this embodiment,
magnets base 20. Themagnet 46a corresponds to the inwardly directedprojection 31 provided on the upper portion of thelatch member 30, which is made of metal. Themagnet 46b is provided to correspond to the wedge-shaped portion at the lower part of thelatch member 30. It goes without saying that themagnets latch member 30 rather than thebase 20. - In the operation of the latch holding device, the inwardly directed
projection 31 is magnetically attracted to themagnet 46a with thelatch member 30 in the locked position, which is indicated by the solid line in Fig. 8. This position is maintained as a result of the attraction between theprojection 31 and themagnet 46a. - When the lower portion of the
latch member 30 is pushed against the attractive force of themagnet 46a, the lower portion of thelatch member 30 is attracted to themagnet 46b and this position is maintained (the position indicated by the two-dot chain line in Fig. 8). - A fourth embodiment of the present invention will be described with reference to Figs. 10 through 13.
- As in the first embodiment described above, the latch holding apparatus of this embodiment includes the
base 20 and thelatch member 30, which cooperates with thebase 20, as basic structural elements. Here the holding device for holding thelatch member 30 in its locked position employs a biasing device using a spring applying a biasing force in mutually opposing directions in such a manner that the latch member for locking can be held reliably in its locked and unlocked positions. - Fig. 10 is a sectional view showing a biasing device according to this embodiment. A
biased body 53 urged in a positioning direction is a latch member capable of being turned between pins a and b about apivot shaft 54.Numeral 55 denotes a pin having a hemispherical head for supporting the upper portion of the biasingdevice 52. Thepin 55 is fixedly secured to a portion of thebiased body 53 below thepivot shaft 54.Numeral 56 denotes a pin having a hemispherical head for supporting the lower portion of the biasingdevice 52. Thepin 56 is attached to a fixedbase 57. - Fig. 11 is a sectional view illustrating a pin seat constituting the biasing device. The
pin seat 58 has a bowl-shapedrecess 59 provided in one end thereof in the axial direction. This end of each pin seat is formed to have a spring seating flange 60 surrounding therecess 59. The pin seats 58 are installed end to end with their recessed portions facing away from each other, and heads 55a, 56a of thepins recesses 59 of the pin seats.Numeral 61 denotes a spring loaded between the spring seating flanges 60 of the upper and lower pin seats 58. - As shown in Fig. 12, the biasing
device 52 is such that when the center of theupper pin 55 is at a position O₁ to the left of a straight line X-X′ connecting the center of the head portion ofpin 56 and the center O of thepivot shaft 54 serving as the rotational center of thebiased body 53, thebiased body 53 is biased in the locking direction or unlocking direction. When the center of the head portion ofpin 55 is at a position O₂ to the right of the straight line X-X′, thebiased body 53 is biased conversely in the locking direction or unlocking direction. - The biasing
device 52 is characterized in that it operates in an effective manner even if a distance E between the center O₃ of thepin 56 and the rotational center (pivot shaft) O of the biasingbody 53 is very small. - In the fourth embodiment constructed as set forth above, the
biased body 53 is restrained and positioned by the pin a in the state shown in Fig. 10. However, when thebiased body 53 is turned in the direction of the arrow, it rotates about thepivot shaft 54. As a result, thepin 55 turns at the same time and so does thepin seat 58 while the bowl-shapedrecess 59 is in contact with the tip of the pin. The turning motion takes place against the spring force of thecoil spring 61 and becomes maximum when the line X-X′ connecting thepivot shaft 54 andpin 56 is surpassed. When this line is surpassed, thebiased body 53 turns under its own force and is positioned at pin b on the opposite side. - In comparison with the well-known biasing devices having the springs shown in Figs. 17 through 20 described earlier, the biasing
device 54 of the fourth embodiment can be easily mounted in the small mounting space between the base 57 attached to thedoor 1 of the van-type vehicle and the latch member, which is thebiased body 53, and the biasingdevice 54 is capable of performing fully the function of a latch holding device. - Fig. 13 shows another embodiment. Here the
pin 55 with the hemispherical head and thepin seat 58 are integrated into a unitary body. More specifically, upper andlower pin seats 58′ have an identical construction, and apin 55′ and spring seating flange 60′ are formed into a unitary body. - Since the
pin 55′ is integrated with thepin seat 58′, bowl-shape recesses 59′ are provided on the side of thebiased body 53 which is positioned and on the side of thebase 57. Numeral 68 denotes a coil spring installed between the opposing upper and lower spring seating flanges 60′, 60′. - Fig. 14 shows a well-known biasing device corresponding to the principle of Fig. 20. This will be compared with the fourth embodiment of the invention shown in Fig. 10.
- Let the following hold:
A = A′ (distance between the pivot shaft of the biased body and the center of the pin tip)
B = B′ (length of spring)
We will then have
C < C′, D > D′, E < E′
where C, C′: distance between centers of upper and lower pin tips
D, D′: deviation of pin tip from neutral position
E, E′: overall length of device - Thus, in accordance with the apparatus of the fourth embodiment, it is possible to achieve the relation C < B, whereas C′ > B′ holds in the case of the well-known apparatus of Fig. 14. In other words, even if the length B of
spring 61 is made sufficiently large, the overall biasing device can be made compact. As a result, the apparatus can be installed easily even in a small space.
Claims (7)
a pair of handle grips in each of which a recess is formed for insertion of the handle;
a pivot shaft for turnably supporting the latch on said handle grips; and
holding means for holding the latch in the locked position when the handle is inserted into said handle grips, and turning the latch and holding it in an unlocked position when the handle is separated from said handle grips.
an urging device comprising a compression spring and pins on both sides of said compression spring, said urging device being fitting into a hole provided in the latch at a position below said pivot shaft and lying parallel to said pivot shaft; and
recesses provided in said handle grips so as to be capable of being engaged and disegaged by the pins on both sides of said urging device, said recesses corresponding to respective ones of a locked position and unlocked position of the latch.
two projections provided on said latch at positions on an inner side thereof below said pivot shaft, said two projections being provided on identical radii having said pivot shaft as the center; and
a leaf spring provided astride a recess provided in the base and corresponding to the projections, said leaf spring having two projections forming a recess between them.
magnets imbedded in upper and lower positions of said latch or in upper and lower positions of said base, said magnets attracting said latch to said base to hold said latch at positions corresponding to the locked position and unlocked position of said latch.
a pair of pins attached in opposing relation to the base and the latch of a portion below the pivot shaft supporting the latch in such a manner that the latch can be turned up and down;
a pin seat having a recess which engages with the pin on the side of said latch, and a spring seating flange; and
a pin seat of the lower portion having a recess which engages with the pin on the side of said base, and a spring seating flange; and
a spring fitted between the spring seating flanges of said upper and lower pin seats, said latch being held in the locked position or being turned and held in the unlocked position by moving a straight line connected centers of said pair of pins to mutually opposing positions with respect to a line connecting a center of turning motion of said latch and a center of the pin on the side of said base.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1989092189U JPH0712560Y2 (en) | 1989-08-07 | 1989-08-07 | Energizing device for locking device, etc. |
JP92190/89U | 1989-08-07 | ||
JP9219089U JPH0640809Y2 (en) | 1989-08-07 | 1989-08-07 | Door latching device |
JP92189/89U | 1989-08-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0412632A1 true EP0412632A1 (en) | 1991-02-13 |
EP0412632B1 EP0412632B1 (en) | 1994-09-14 |
Family
ID=26433657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90303488A Expired - Lifetime EP0412632B1 (en) | 1989-08-07 | 1990-03-30 | Latch holding apparatus of handle for opening and closing door |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0412632B1 (en) |
DE (1) | DE69012481T2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2743105A1 (en) * | 1995-12-29 | 1997-07-04 | Pommier & Cie | Slam door lock, esp for heavy good vehicle |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1627752A (en) * | 1925-09-22 | 1927-05-10 | Sylvester J Small | Door fastener |
DE802046C (en) * | 1948-10-02 | 1951-02-01 | Daimler Benz Akt Ges | Hood and lid closure, especially for motor vehicles |
US3476425A (en) * | 1968-02-06 | 1969-11-04 | Ridge Nassau Corp | Lever type lock |
DE1708177A1 (en) * | 1967-11-30 | 1971-04-22 | Josef Haberl | Window closure with free-acting and perforated locking bar |
DE2107588A1 (en) * | 1971-02-13 | 1972-09-14 | ||
GB1485632A (en) * | 1973-11-27 | 1977-09-14 | Illinois Tool Works | Shelf support clip |
-
1990
- 1990-03-30 DE DE69012481T patent/DE69012481T2/en not_active Expired - Fee Related
- 1990-03-30 EP EP90303488A patent/EP0412632B1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1627752A (en) * | 1925-09-22 | 1927-05-10 | Sylvester J Small | Door fastener |
DE802046C (en) * | 1948-10-02 | 1951-02-01 | Daimler Benz Akt Ges | Hood and lid closure, especially for motor vehicles |
DE1708177A1 (en) * | 1967-11-30 | 1971-04-22 | Josef Haberl | Window closure with free-acting and perforated locking bar |
US3476425A (en) * | 1968-02-06 | 1969-11-04 | Ridge Nassau Corp | Lever type lock |
DE2107588A1 (en) * | 1971-02-13 | 1972-09-14 | ||
GB1485632A (en) * | 1973-11-27 | 1977-09-14 | Illinois Tool Works | Shelf support clip |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2743105A1 (en) * | 1995-12-29 | 1997-07-04 | Pommier & Cie | Slam door lock, esp for heavy good vehicle |
Also Published As
Publication number | Publication date |
---|---|
DE69012481T2 (en) | 1995-04-06 |
EP0412632B1 (en) | 1994-09-14 |
DE69012481D1 (en) | 1994-10-20 |
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