SE524858C2 - Locking device and combination thereof with an engagement means - Google Patents

Abstract

A locking device (1) intended to be movably arranged in relation to an engagement means (3), which locking device comprises a hook bolt (15) for engagement with the engagement means and a control element, which hook bolt presents an aperture (21) with an inner surface, and which control element comprises a follower (27) having an eccentric axis of rotation and a peripheral surface. The control element is arranged to transmit motion from an operating means to the hook bolt when the operating means is moved between a locking position and a release position, so that a relative tightening between the engagement means and the locking device is achieved when the operating means is moved to its locking position. In order to prevent breaking up of the locking device, the hook bolt is provided with a securing surface (17b), which is arranged to turn around the engagement means during locking.

Description

2524 2524 ass first shaft pin, which extends in a direction transverse to the direction of movement of the door and is attached to a side plate of the lock.

A hook bolt which extends substantially parallel to the direction of movement of the door is arranged next to the actuator seen in the direction of movement of the door. The hook bolt is pivotally mounted about a second shaft pin which extends parallel to the first shaft pin and is attached to the actuator, on one side of the first shaft pin seen in the longitudinal direction of the shaft pins. One end of the hook bolt has a cam surface which is arranged to slide on and past the end plate bolt and has a recess which is designed to fall down and engage with the end plate bolt as the door moves towards its closed position. The lock is further provided with means which hold the hook bolt in position so that its cam surface can slide up on the end plate bolt. The actuator and the two shaft journals are positioned so that the axis of rotation of the hook bolt moves about the axis of rotation of the actuator when the actuator is actuated, the hook bolt being imparted a tightening movement when the actuator is moved to the closed position and a projecting movement when the actuator is moved to the open position. The operating member and the hook bolt further have cooperating elements by means of which the end of the hook bolt is lifted by the operating member when it moves to the open position and is pressed downwards when the operating member moves to the closed position.

The construction described in US 2,599.51l is relatively complicated and is based on the principle that the actuator and the hook bar are placed next to each other, i.e. within separate vertical planes parallel to the main plane of the door leaf. Such a placement entails a number of design, technical and strength disadvantages. On the one hand, this side-by-side placement means that the entire locking structure is subjected to bending stresses when the pushing and tightening force 10 15 20 25 30 524 858 is transmitted via the hook bar. This applies in particular to the two shaft journals as well as the areas in the actuator and the side plate where the shaft journals are attached. Furthermore, the described placement entails a serious limitation of the wall thickness that can be used with the hook bolt and the actuator at a given maximum width dimension of the lock, perpendicular to the main plane of the door. In addition, the placement of the two shaft pins side by side means that the maximum diameter of the pins is relatively limited. This in turn entails a limitation of the contact surfaces between the shaft journals and the hook bolt, the actuator and the side plate, respectively, which leads to large contact pressures with an increased risk of material breakage on these force-absorbing parts in the construction.

Brief Description of the Invention The present invention relates to a lock which allows a tightening force and a firing force to be applied between a slidable or pivotable door and an adjacent frame when the actuator of the lock is moved between an opening position and a closing position. An object of the invention is to provide such a lock which has a simple construction, which overcomes the above-described construction and strength technical disadvantages of previously known locks and which counteracts breaking of the lock.

This object is achieved with a lock of the type described in the first paragraph of this description and which has the features stated in the characterizing part of claim 1.

Since the hook bolt is arranged around the rower, so that the power transmission is effected with the peripheral limiting surface of the rower and the inner surface of the hole, it is possible that the rower and the hook bolt are within the same vertical plane which is parallel to the main plane of the door leaf. In this way, the wall thickness of both the rower and the hook bar can be made as large as the internal width of the lock. In addition, the invention means that only one shaft, namely the axis of rotation of the rower, needs to be stored in adjacent force-receiving means. This single shaft is easily stored in the usual way in the two side plates of the lock, whereby no bending stresses occur in the construction when the tightening and firing force is transmitted from the operating member to the engaging member.

The invention also enables the force-transmitting surfaces of the rower and the hook bolt holes to be made relatively large, which leads to lower contact pressure and thus reduced risk of damage or breakage of the parts, even if the tightening and firing forces transmitted are large.

Further advantages and features of the lock according to the invention appear from the following dependent claims and from the detailed description below.

The invention also relates to a combination of a lock and an engaging member which enables the lock according to the invention to be used at sliding doors which are imparted a skewed movement component during their closing movement.

Description of embodiments of the invention An exemplary embodiment of the invention is described below with reference to the figures, of which: Figure 1 is a perspective view of an embodiment of the lock according to the invention and an engaging member, where certain details are removed for increased clarity.

Figures 2a and 2b show different perspective views and 2c a top view of an end plate which is included in a combination with a lock. Figure 3 is a side view of the lock shown in Figure 1, without engaging means.

Figure 4 is an enlarged side view of a rower included in the lock shown in Figure 1.

Figure 5 is an enlarged side view of a hook bolt included in the lock shown in Figure 1.

Figures 6, 7 and 8 show side views of the lock as it occupies different positions when closing and opening.

Figure 9 is a side view of an enlarged detail of the embodiment of the lock and engaging means shown in Figure 1.

Figures 10 and 11 are top views of a combination of a lock and an engaging member according to the invention.

Figure 1 shows a first embodiment of a locking device 1 according to the invention. The figure also shows an end plate 2 with an engaging member 3 in the form of a shackle which is attached to the end plate 2. In the further description it is assumed that the lock 1 is mounted in a door and the end plate 2 in a door frame.

The lock is particularly suitable for use with sliding doors that are closed and opened by sliding the door in a horizontal or vertical direction, substantially parallel to the main plane of the door leaf. In such doors, a sealing strip can be arranged, either on the frame or on the short side of the door leaf facing the frame. In order to obtain a good sealing effect on the strip, this should be compressed between the door and the frame when the door is closed. For this purpose, the lock is designed to provide a tightening force between the door and the frame when the door is closed.

The lock 1 is primarily intended to be mounted recessed in a door leaf 40 (see figure 10). The lock comprises a lock housing 4 which is laterally bounded by two opposite cover or side plates 5, 5 of which only 5 5 are shown, only one of which is shown in the figure. The side plate 5 shown in the figure has internally threaded pins 6 which cooperate with screws for holding the two side plates together. In the mounted position, the lock housing 4 is attached to a locking post 7 and recessed in the door leaf, so that the side plates 5 are substantially parallel to the main plane of the door leaf.

The end plate 2 (see Figures 1 and 2a-2c) comprises a fastening plate 8 which is fastened to the frame by means of screws (not shown) which in mounted position extend through screw holes 9 in the fastening plate 8.

An engaging member in the form of a bracket 3 is attached to the back 8 of the mounting plate and extends through an opening 10 in the mounting plate 8 into the door opening. The stirrup 3 (see Fig. 2a) comprises two side legs 11a, 11b which at their ends facing the door opening are connected by an engaging part 12. The engaging part 12 has a cam surface 13 which slopes downwards in the direction of the door opening and terminates in the direction of the door opening by a vertical Referring again to Figure 1, the lock 1 comprises a hook bolt 15. The hook bolt 15 is shown more clearly and on an enlarged scale in Figure 5. It has at its free end facing the end plate 2 a cam surface 16 and a recess 17 which is open downwards.

The recess 17 has an engaging surface 17a, arranged closest to the cam surface 16 of the hook bolt, which ends downwards with a securing surface 17b angled from the cam surface 16 of the hook bolt 16. A projecting surface 17c is arranged on the side of the recess 17 opposite the engaging surface 17a. The engaging surface 17a and the projecting surface 17c are connected by an abutment surface 17d. The hook bolt 15 further has an elongate portion 18 which connects the end having the cam surface 16 and the recess 17 with a widened portion 19. The elongate portion 18 extends through an opening 7a in the locking post 7, which opening 7a has a lower support surface 7b (see figure 1). A torsion spring 20 is arranged around one of the pins 6 and takes a leg 20a support against another pin, so that the second leg 20b of the spring abuts and presses the hook bar down against the support surface 7b.

A through hole 21 is occupied by the widened portion 19 of the hook bar (see Figure 5). The hole 21 has a generally circular-cylindrical shape with an inner surface. From the generally circular-cylindrical shape, a lug 22 projects, inwards towards the center of the hole 21. The lug 22 has two side lug surfaces 22a, 22b opposite in the circumferential direction of the hole and an inner lug surface 22c facing the center of the hole.

From a lower part of the inner surface of the hole 21 an elongate continuous recess 23 extends a distance in the direction of the elongate portion 18 of the hook bolt. A compression spring 24 and a steel ball 25 are arranged in the recess 23 (see figure 1), so that the coil spring 24 takes support against the bottom 26 of the recess and presses the ball 25 in the direction of the hole 21.

Inside the hole 21 a rower 27 is arranged. Figure 4 shows the rower 27 on a larger scale than the hook bar 15 in figure 5.

The rower 27 has a general circular-cylindrical shape with a peripheral boundary surface 28. The outer diameter of the rower 27 over most of its circumference is only slightly smaller than the diameter of the general circular-cylindrical shape of the hole 21. In this way, the hook bolt 15 can pivot about the rower 27 at the same time as a large part of the rower's peripheral limiting surface 28 and the inner surface of the hole 21 cooperate for power transmission. In the peripheral limiting surface 28 of the rower 27, a stop recess 29 is received radially inwards. The abutment recess 29 occupies a circular segment corresponding to about 90 ° and is limited in the circumferential direction by two substantially radially arranged abutment surfaces 29a, 29b. A locking position recess 30 is accommodated a further small radial distance inwards from the stop recess 29. The locking position recess 30 is limited in the circumferential direction of the clockwise abutment surface 29a and 10 of a locking stop abutment surface 30a, which is arranged at a long distance corresponding to the circumferential direction of the inner heel surface 22c of the hook bolt. Furthermore, in the peripheral limiting surface of the rudder 27, outside the stop recess 29, two locking position recesses 3la, 31b are accommodated. These locking position recesses 31a, 31b are substantially spherical with dimensions corresponding to a part of the mantle surface of the steel ball 25.

The rower 27 further has an eccentrically placed integrated shaft journal 32 projecting from both sides of the rower.

The shaft journal has a through-going square hole 33 in which a pressure 34 (see Figs. 6-8) or another actuator can be attached. The shaft journal is further pivotally mounted in opposite openings of the two side plates 5.

Referring to Figure 6-9, the function of the lock is described below. Figure 7 shows the lock with a laterally described locking arm 36 in its locking position. This locking position is only taken if the locking arm is actively moved there by operating a locking cylinder 38. When closing the sliding door, the lock is initially in the position shown in figure 6. The free end of the hook bolt 15 is in a position projecting from the lock housing 4. The torsion spring 20 presses the hook bolt 15 into abutment against the support surface 7b in the locking post 7.

The compression spring 24 presses the steel ball 25 into the locking position recess 31a on the rudder 27. Hereby the rudder 27 and the hook bolt 15 are releasably locked from relative rotation between them and the pressure 34 is thus kept in its horizontal position.

The door is now displaced towards the frame and the end plate 2. This can be achieved either by applying a horizontally directed force to the left in the figure on the pressure 34 or by manually or for example hydraulically or pneumatically applying a corresponding force on the door leaf or on a handle arranged on the door leaf. As the short side of the door approaches the frame, the cam surface 16 of the hook bar 15 slides up on the cam surface 13 of the engaging portion 12 of the yoke 3, as shown in Figure 9. The hook bar 15 and the rudder 27, which are still releasably locked relative to each other and the shaft pin 32 thus pivots clockwise in the bearings of the shaft journal 32 in the side plates 5. During this movement, the pressure 34 pivots down slightly in a clockwise direction. When the downwardly facing tip of the securing surface 17b in the recess 17 of the hook bolt has passed the engaging part 12 of the bracket 3, the torsion spring 20 presses the free end of the hook bolt downwards so that the abutment surface 17d of the recess 17 is brought to rest against the upper side of the engaging part 12. The hook bolt 15, the rower 27, the shaft pin 33 and the pressure 34 then turn counterclockwise and return to the position shown in figure 6.

It is from this position that the tightening motion is initiated.

By applying a counterclockwise force to the pressure 34, the shaft journal 33 and the rower are caused to rotate counterclockwise.

The free end of the hook bar 15 is prevented from moving downwards because the abutment surface 17d abuts against the engaging part 12 of the yoke 3. The rower 27 can then rotate freely relative to the ratchet 15. Since the rotation axis of the rudder 27 is eccentrically arranged and since the ratchet 15 is arranged around the rudder 27, the center of the hook 21 holes 21 and thus the rotation axis of the ratchet will move along a circular line about the rudder axis of rotation. The free end of the hook bar 15, which cannot move downwards, is then imparted a horizontal movement to the right in the figure. The engaging surface 17a of the recess 17 of the hook bolt 15 engages with the engaging part 12, whereby further horizontal movement to the right in the figure of the hook bolt is prevented. Continued counterclockwise rotation of the pressure 34 now causes the widened portion 19 of the hook bolt to move inwards / upwards relative to the lock housing 4, the door, in which the lock housing is fixed, moving in the direction of the end plate 2. This tightening movement continues until its rudder 27 abutment surface 29a comes into contact with the side heel surface 22a of the lug 23 in the hole 22 of the hook bar (see Figures 7, 4, 5). The lug 22 then assumes, as a result of radially directed force action between the peripheral limiting surface of the rower and the inner surface of the hole, a locking position where the inner lug surface 22c is located in the locking position recess 30 on the rower. If a horizontal force in the opening direction is applied to the door, this prevents the door from going up as the side heel surface 22b of the lug abuts against the locking position abutment surface 30a of the locking position recess 30. Since the widened portion 19 of the hook bolt 15 also moves upwards during the tightening / locking movement, the free end of the hook bolt will rotate around the engaging part 12, the securing surface 17b to some extent enclosing the underside of the engaging part 12.

This counteracts breaking of the lock by applying an upward force in the vicinity of the free end of the hook bolt. When the lock has assumed this locking position, the pressure 34 is in the vertical position, as shown in figure 7. The pressure 34 is kept in this vertical position by the rudder 27 and the hook bar 15 being releasably blocked from relative rotation between them when the steel ball 25 is pressed into the other the locking position recess 3lb in the peripheral boundary surface of the rower 27.

If the door, based on the initial position shown in Figure 6, is retracted with great force, so that the sealing strip between door and frame is compressed by this closing force, the lock may pass the sequences described above without any counterclockwise tightening force having to be applied to the pressure.

Based on the locking position illustrated in Figure 7, it is described below how the door is opened. The figure shows the locking arm 36 described below in its locking position. When opening the door, however, this locking arm must be in its release position, which position is shown in figure 8. To release the lock, a clockwise force is applied to the vertically oriented pressure 34. The rower then rotates 27 clockwise.

However, the hook bolt 15 is still prevented from rotating because the securing surface 17b of the recess 17 is still in engagement with the engaging part 12. This overcomes the spring force of the compression spring 24 and forces the steel ball 25 out of the locking recess 31b, whereby the rower 27 and the hook bolt 15 can rotate freely relative to each other. At the same time, the lug 22 is forced out of its locking position in the locking position recess 30 and can then slide freely in the rudder stop recess 29.

The rotary spring 20 presses the hook bolt 15 downwards so that the abutment surface 17d in the recess 17 abuts against the engaging part 12. During continued rotation clockwise by the rudder 27, the free end of the hook bolt 15 is imparted a horizontal movement relative to the lock housing 4 in the direction thereof. The projecting surface 17c of the recess 17 then engages with the vertical abutment surface 14 of the engaging part 12, whereby the door is provided with a projecting force which causes it to move away from the end plate 2. At the same time the widened portion 19 of the hook bar 15 moves downwards so that the free end of the hook bar 15 engaging part 12. In this way, the engagement of the securing surface 17b around the engaging part 12 is released.

When the rower has rotated to the position shown in Figure 6, the hook bar 15 assumes a horizontal, extended position. In this position, the steel ball 25 is pressed back into the locking position recess 3la on the peripheral surface of the rower 27. During continued clockwise rotation of the rudder 27, the abutment surface 29b of the rudder comes into contact with the side heel surface 22b of the lug 22, the hook bolt being caused to rotate about the axis of rotation of the rudder 27. The clockwise force applied to the pressure 34 overcomes the spring force of the torsion spring 20, the free end of the hook bolt being lifted so that the lower tip of the securing surface 177 of the locking member 177 goes free from the upper side of the engaging part 12 and the door can be slid open. The lock has then assumed the position shown in figure 8 and when the clockwise force on the pressure 34 is removed, the lock returns to the position shown in figure 6 by the torsion spring 20 pressing the hook bolt to abut against the support surface 7b of the locking post 7. Since the steel ball 25 is pressed into the locking position recess 3la, the rower and the pressure follow to the positions shown in figure 6.

The lock according to the invention can be provided with a locking arm 36 which is pivotally arranged between a release position shown in Figures 6 and 8 and a locking position shown in Figure 7. In the locking position, one end of the locking arm 36 engages a locking recess 37 on the widened portion 19 of the hook bolt 15, thereby preventing any movement of the hook bolt from its retracted locking position. The movement of the locking arm is controlled by a locking cylinder 38 which is operated by means of a key or a knob (not shown) in the usual manner.

The invention also relates to a combination of the lock described above and an engaging means. With reference to Figures 10, 11a 2a, 2b and 2c, a preferred embodiment of the combination according to the invention is described below. Since the lock according to the invention has been described above, the following description of the combination according to the invention is concentrated on the engaging member.

Figures 10 and 11 show a sliding door 40 where the sealing effect between door 40 and frame 41 is not achieved between the short side 42 of the door leaf and a side of the frame facing the door opening. Instead, a sealing effect is achieved here between a surface 43 of the door leaf 40 which is parallel to the main plane of the door leaf and arranged in the vicinity of the short side of the door leaf facing the end plate and a corresponding parallel surface 44 of the frame. Between these two surfaces a sealing strip 45 can be arranged. In the example shown, the sealing strip is attached to the frame, but it can also be attached to the door leaf.

In order to achieve a good sealing effect in such sliding doors, the door 40 must, during its displacement in the direction of closed position, in addition to moving parallel to the main plane of the door, in the direction of the frame, also impart a component in a normal direction to the main plane of the door leaf. This can be achieved, for example, by arranging wedge-shaped guide means 46 in the frame 41 or in grooves outside the frame, which guide means 46 guide the door during its displacement movement towards the closed position. These guide means 46 force the door 40, as it approaches the closed position, to move obliquely towards the stop in the frame. A problem which arises in the use of the above-described tightening and projecting lock according to the invention at such doors is that conventional engaging means do not allow any oblique movement.

This problem is solved with the combination according to the invention. Figure 2b shows how the stirrup 3 is attached to the mounting plate 8. The two side legs 11a and 11b are joined at their ends facing away from the engaging part 12 by a generally V-shaped piece 11c extending through the opening 10. In the V-shaped piece llc is a vertical through hole 47 occupied. A pin 48 is arranged through the hole and attached to the side of the mounting plate 8 facing away from the door opening. The inner diameter of the hole 47 is slightly larger than the outer diameter of the pin 48 so that the bracket 3 can pivot about the pin 48. The bracket 3 is held in a vertical position by abutting the underside of the V-shaped piece 11c against the lower edge of the opening 10. Figure 2c shows the bracket 3, the mounting plate 10 and the pin 48 in a top view. The figure shows that a vertical surface 12a of the engaging part 12, which faces away from the door opening, has a convex shape 12b bulging from the door opening.

When the combination of lock and engaging means according to the invention is used in sliding doors which at the end of their closing movement are imparted to a movement component across the main plane of the door leaf, the lock functions as described above. During the tightening phase, the engaging surface 17a of the hook bar 15 engages with the vertical surface 12a of the engaging member 12. As the door 40 approaches its closed position and is subjected to an oblique movement in the direction of the sealing strip 45, the stirrup 3 will pivot about the pin 48 while the convex shape 12b of the vertical surface 12a of the engaging member 12 allows the hook surface engaging surface 17a to roll over the convex vertical surface. The door 40, the lock 1 and the hook bolt 15 are thus allowed to move laterally relative to the end plate 2 and the engaging part 12 without any transverse forces or bending stresses arising on the hook bolt 15, the end plate 2 or the engaging member 3.

Above, an exemplary embodiment of the locking device and the combination of a locking device and an engaging member according to the invention has been described. The invention can, of course, be varied within the scope of the appended claims. For example, the lock can be placed in the frame and the engaging member in the door.

The lock according to the invention can also be used with hinged hinged doors, instead of sliding doors. The pressure 34 described above can be replaced by other manually or, for example, electrically, pneumatically or hydraulically actuable actuators. Furthermore, the lock can be made with or without the locking mechanism which comprises the locking arm 36 and the locking cylinder 38.

Claims (10)

10 15 20 25 30 524 858 _ .. ..._ I- oo n ..- ... ...... . . ... . ... . .HRS . . . . ... 15. ... U .. .. H ø a e | u. u Patent Claims Locking device (1) which is intended to be movably arranged relative to an engaging member (3) and which comprises a hook bolt (15) having a recess (17) for engaging with the engaging member (3) and which, at a distance from the recess (17), has a hole (21) with an inner surface, and a guide means (27) which comprises a rudder (27) with an eccentric axis of rotation and a peripheral limiting surface (28) and which is arranged to transmit movement from an operating member. (34) to the hook bolt when the actuator is moved between a locking position and an opening position, the movement transmitted to the hook bolt causing a relative tightening between the lock and the engaging member when the hook bolt recess engages the engaging member and the actuator is moved towards the locking position around the hook rule. , the inner surface of the hole of the hook bolt enclosing and cooperating with the peripheral limiting surface of the rower, so that rotation of the rower entails the hook bolt, The movement transmitted to the hook bolt causes a relative displacement between the lock and the engaging means when the recess of the hook bolt engages with the engaging means and the actuating means is moved towards the opening position and that the recess (17) of the hook bolt (15) has a securing surface (17b) and that the hook bolt and rod (27) are designed to allow the recess with the securing surface to rotate around the engaging means (3) when the operating means (34) is moved between its opening position and its locking position, in order to counteract breaking of the locking device. Locking device according to claim 1, wherein the rudder (27) has a substantially cylindrical part whose mantle surface constitutes the rudder 10 5 5 8585. ...... ... . H2 Z '..!. . ..... . . . ... 16 - --- - - - »- ø o a n nu v u - n. | o v: peripheral limiting surface (28), the respective end limiting surfaces of the substantially cylindrical part of the rower and the hole (21) of the hook bar (15) lying in substantially the same plane. Locking device according to claim 1 or 2, wherein the rudder (27) and the hook bolt (15) are arranged so that the hook bolt pivots around the engaging member (3) when the operating member is moved between the opening position and the locking position. Locking device according to one of Claims 1 to 3, in which abutment surfaces (29a, 29b) are arranged on the peripheral surface of the rudder (27), which abutment surfaces cooperate with side surfaces (22a, 22b) which are arranged on a lug (22) of the hook bar. (15), which lug projects inwardly into the hole (21), to transmit rotational movement from the rower (27) to the hook bar (15). Locking device according to claim 4, in which a radially inwardly received recess (30) in the peripheral surface of the rower is arranged between the abutment surfaces (29a, 29b) for receiving the lug (22) when the hook bolt (15) is in a retracted locking position. A locking device according to any one of claims 1-5, in which the hook bolt (15) comprises a cam surface (16) which is arranged to slide on the engaging member (3). Locking device according to one of Claims 1 to 6, in which the hole (21) in the hook bolt (15) is continuous and the rudder (27) has a continuous shaft (32) which is pivotally mounted in a lock housing (4) which surrounds the hook bolt. and the rower, the through shaft (32) having means (33) for engaging the actuator (34). A locking device according to any one of claims 1-7, in which means (23, 24, 25, 26, 3la, 3lb) are arranged to releasably block the relative movement between the rower and the hook bar in two locked positions. 5 2 4 8 5 8 f; Rf. . 17 - .. .. .. .. ..... ..... Combination of a locking device according to any one of claims 1-8 and an engaging member (3), in which the engaging member (3) is pivotally arranged about a vertical axis of rotation (48). A combination according to claim 7, in which the engaging means (3) comprises a convex surface (12b) which is arranged to engage with an engaging surface (17b) of the recess (17) in the hook bolt (15).