DE9414599U1 - Espagnolette lock for doors of commercial vehicle bodies, transport containers and the like. - Google Patents

Description

DESCRIPTION

According to the preamble of claim 1, the invention relates to a rotary bar lock for doors of commercial vehicle bodies, transport containers and the like, with a handle for turning the rotary bar and with at least one locking part at one end of the rotary bar, which is locked against a counterholder in the closed position, wherein the locking part has a radially protruding arm, which turns behind a hook on the counterholder during the closing process and thereby pulls the door closer.

A rotary bar lock of this type is known from DE-PS 19 60 697. It has the advantage that it is fully unlocked after the rotary bar has been turned by 90° using the handle. In this position, the door can be opened by pulling on the handle. This is particularly important for box bodies on refrigerated vehicles, because the sealing strips on the door frame can stick quite firmly to the door, especially after a long journey. The disadvantage of this lock, however, is the fact that when there is internal pressure against the door, which can arise, for example, from the load slipping, a torque is created on the rotary bar that acts on the handle, which is why both the rotary bar and the handle, including the holding device with which the handle is fixed in the closed position of the lock, must be made extremely stable. In addition, if the internal pressure is very high, the espagnolette can even become torsioned, which means that the door no longer sits properly on the door frame.

The invention was based on the object of developing a rotary rod lock as described in more detail above in such a way that no torque occurs in the closed position when an internal pressure acts against the door, without losing the property that the rotary rod only has to be turned by 90° to completely unlock the lock.

The further development of the espagnolette lock described in more detail at the outset which solves this problem consists, according to the characterizing part of claim 1, in that a further hook is arranged on the counterholder, which points in the same direction as the first hook and, in the closed position, engages in a hook arranged on the locking part, whereby in the closed position the further hook on the counterholder and the hook on the locking part are opposite one another and the arrangement of the latter in relation to one another is such that, during the closing process, the retraction is at least largely completed before they come into engagement with one another.

What is important in the espagnolette lock according to the invention is that a further hook is provided on the counterholder, which in the closed position engages a hook on the locking part. This prevents a torque being generated by the radially protruding arm on the locking part when there is internal pressure against the door, which torque acts on the espagnolette and the handle connected to it and its holding device.

Preferred embodiments are given in claims 2 to 4. According to claim 2, the radially projecting arm and the hook on the locking part are arranged at an angle of approximately 90° to each other. This ensures that the hook on the locking part is only screwed into the further hook on the counterholder after the retrieval process has almost been completed. It is also particularly advantageous, as stated in claim 3, that the contact surfaces between the further hook on the

The counterholder and the hook on the locking part run radially to the axis of the espagnolette. This achieves complete freedom from torque on the espagnolette when cargo presses against the door of the vehicle body. The further development according to claim 4 consists in the counterholder having two further hooks arranged on the side of the base plate, which correspond to two hooks on the locking part. This achieves a particularly low overall height for the espagnolette lock.

Espagnolette locks, in which no torque occurs when there is internal pressure against the door, are known in and of themselves, for example from US patents 2,260,519 and 2,236,594. With these locks too, an arm on the locking part rotates behind a hook on the counterholder during the closing process, which pulls the door closer and finally closes it. In the closed position, a cam rests on another hook. However, since the arm and the cam are offset in height and the construction height of the lock is therefore considerable, these locks can only be attached to very wide vehicle frames. The geometry of the arrangement of the locking elements is also such that the turning rod must be rotated by almost 180° from the locking position to the unlocking position, so that such a lock has the disadvantages that its handle cannot be used to open the door by pulling and that it cannot be installed in the door because in such a case the handle is in a tray and pivoting the handle and thus turning the turning rod by significantly more than 90° is impossible. Another turning rod lock, in which no torque occurs when there is internal pressure against the door, is known from US Pat. No. 3,464,729. In this lock, in the locking position, a two-armed locking part arranged on the turning rod rests on two pins of the counterholder, each of which is located to the side of the turning rod. With this turning rod lock, too, only

a rotation of the rotating rod by 90° is necessary to disengage the locking part from the counterholder. A particular disadvantage of this lock, however, is that the geometry of the two-armed locking element and the arrangement of the pins on which the two arms rest in the locking position are designed in such a way that the door is pressed shut more firmly both during locking and unlocking than in the locking position itself, i.e. that when the locking position is reached the door springs open again slightly and is therefore not kept firmly closed. This can lead to rattling noises and to the rotating rod lock being knocked out.

The invention will now be explained in more detail with reference to the accompanying drawings.

The drawings show:

Figure 1

Figure 2

Figure 3

Figure 4

Figs. 5, 6 and 7

a view of the counterholder;

a partially cutaway view of

the counterholder;

a view of the locking part; a section through the locking part on the line III/III of Figure 3;

a top view corresponding to Figures 2 and 4 during different phases of the closing process.

According to Figures 1 and 2, the locking part has a base plate 1 with a first hook 2 protruding from it and two second hooks 3 attached to the side of the base plate 1. All hooks point in the same direction with their free ends. With the help of holes 4, the counterholder can be attached to the portal or door frame of a box body.

The locking part has a cylindrical section 5 with a likewise cylindrical pin 6, which is used for fastening to a rotating rod. An arm 7 with a nose 8 protrudes radially from the cylindrical section 5. It also has two hooks 9 on the side of the arm 7.

The beginning of the closing process is shown in Figure 5. The arm 7 initially engages the hook 2 on the counterholder with its nose 8. By turning the rotating rod and thus the locking part, the arm 7 is pivoted so that the locking part and thus the rotating rod are brought closer to the counterholder. After a further rotation of the rotating rod and a related pivoting of the arm 7, the locking part is then brought even closer to the counterholder. In the last part of the turning process, the two hooks 9 on the locking part then engage under the two hooks 3 on the counterholder until, after a total rotation of 90°, the state shown in Figure 7 is reached. In this position, the hooks 3 and 9 engage with one another in such a way that a torque-free locking of the locking part on the counterholder is achieved.

Of course, a locking rod lock normally has a locking part and a counter-holder on its top and bottom.

Claims (4)

EXPECTATIONS 1. Espagnolette lock for doors of commercial vehicle bodies, transport containers and the like, with a handle for turning the espagnolette and with at least one locking part at one end of the espagnolette, which is locked against a counterholder in the closed position, the locking part having a radially projecting arm (7) which rotates behind a hook (2) on the counterholder during the closing process and thereby pulls the door towards it, characterized in that a further hook (3) is arranged on the counterholder, which points in the same direction as the first hook (2) and in the closed position engages in a hook (9) arranged on the locking part, the further hook (3) on the counterholder and the hook (9) on the locking part being opposite one another in the closed position and the arrangement of the latter in relation to one another being such that during the closing process the pulling towards it is at least largely completed before they come into engagement with one another. 2. Espagnolette lock according to claim 1, characterized in that the radially projecting arm (7) and the hook (9) on the locking part are arranged at an angle of approximately 90° to one another. 3. Rotating rod lock according to one of claims 1 or 2, characterized in that the contact surfaces between the further hook (3) on the counterholder and the hook (9) on the locking part run radially to the axis of the rotating rod. 4. Espagnolette lock according to claim 1, 2 or 3, characterized in that two further further hooks (3) are arranged on the sides of the base plate (1) and that two corresponding hooks (9) are also provided on the locking part.