JPH02279883A - Sidebar cylinder lock and manufacture of core thereof - Google Patents

Abstract

PURPOSE:To reduce the cost of product as well as facilitate manufacturing moulds by a method in which the tumbler-housing chamber of a core to be slidably and rotatably attached to a cylinder is formed by setting a separate partition wall plate into the recession of a block-shaped mold. CONSTITUTION:A given shape of a core 20 having a recession 29 and a recession 26, which is formed by a block-shaped mold 70 with a continuously waved recession 71, is provided. A given shape of a partition wall plate 28 whose upper part has the same shape as the periphery of the cylinder 21 is set into the recessions 29 of the core 20 to form a tumbler housing chamber 25. A tumbler is housed in the chamber 25, and the core 20 with sidebar and other given components are set in the cylinder an a turnable and slidable manner. The needs for forming the partition wall in the core can thus be eliminated in manufacturing mold, and the mold can thus be easily obtained. Damage to mold and occurrence of defect product can be prevented. Also, the accuracy can be raised and the cost can also be cut down.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a key insertion hole extending in the axial direction and a plurality of key insertion holes arranged in and out of the key insertion hole in an inner cylinder that can be attached to and removed from an outer cylinder. The present invention relates to a sidebar cylinder lock having a storage chamber for individually storing tumblers, and a method for manufacturing the inner cylinder thereof.

[Prior Art] This type of sidebar cylinder lock is known to have an inner cylinder as shown in FIG.

The inner cylinder 1 can be attached to and removed from an outer cylinder (not shown), and the inner cylinder 1 has a key insertion hole 2 extending in the axial direction. Further, above the key insertion hole 2, a plurality of tumblers (not shown) are arranged in communication with the key insertion hole 2 and the side bar mounting hole 3 and can be freely moved in and out of the key insertion hole 2.
A plurality of storage chambers 4 are formed to individually store the items.

This inner cylinder 1 is formed by molding using a metal mold 5 arranged as shown in FIG.

[Problems to be Solved by the Invention] However, in the conventional side bar cylinder lock, each storage chamber 4 provided in the inner cylinder 1 has a wall 6 in order to individually store a plurality of tumblers. It has a structure with multiple narrow spaces partitioned into spaces.

Therefore, the strength of the mold 5 used when forming the inner cylinder 1 by molding is inevitably low because each of the arrows 7 forming each storage chamber 4 has an independent shape. In addition, it is difficult for the raw material to sufficiently spread through the narrow area between the arrows 7 and 7. In addition, as shown in FIG. Since the contact area between the arrow 7 and the wall 6 etc. is large, there is a problem in that the resistance applied to the arrow 7 is large and the arrow 7 is frequently damaged.

The present invention has been made in view of the above-mentioned problems, and its purpose is to facilitate the production of molds, prevent damage to the molds, extend the life of the molds, and reduce the defective rate of products. It is an object of the present invention to provide a side bar cylinder lock and a method for manufacturing its inner cylinder, which can improve precision and reduce costs.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a key insertion hole extending in the axial direction and a key insertion hole disposed in the inner cylinder that can be attached to and removed from the outer cylinder, and that can be freely inserted into and removed from the key insertion hole. multiple tumblers
In a side bar cylinder lock that has multiple storage chambers for individually storing keys, each storage chamber is formed by a recess that communicates with the key insertion hole and opens onto the outer cylinder surface, and a plurality of partition plates built into the recess. It is characterized by Further, the storage chamber is formed by fitting the partition plate at a certain distance into a recess formed by an integral block-shaped mold.

[Function] With the manufacturing method of the side bar cylinder lock and inner cylinder configured as described above, the storage chamber is formed by forming a separately formed flat plate in a recess molded using a block-shaped mold. It is formed by incorporating a bulkhead plate. For this reason,
This makes it possible to easily manufacture the mold, prevent damage to the mold, and extend its life, and also to reduce costs by reducing the defective rate and improving precision of the product.

[Example] Hereinafter, the present invention will be explained based on the drawings.

FIGS. 1 to 7 show an embodiment of the method for manufacturing a sidebar cylinder lock and an inner cylinder according to the present invention.

As shown in Figures 6 and 7, side bar cylinder lock A
consists of an outer cylinder 10 and an inner cylinder 20, and has a tumbler holder, a stopper 40, and a side bar 50 inside the inner cylinder 20. 60 is a change key for locking or unlocking.

The outer cylinder IO has a cylindrical part 11 and a flange part 12, and an inner circumferential surface 13.
A stepped portion 14 with an enlarged diameter is formed on the front side, which is the key insertion surface, and a stepped portion 15 with a similarly enlarged diameter is formed on the back side.

The inner cylinder 20 has a cylinder part 21 that can be rotatably and slidably attached to the inner circumferential surface 13 of the outer cylinder 10, and a collar part 22 that prevents the cylinder part 21 from being pulled out to the back side. It is detachably attached to the outer cylinder 10. This inner cylinder 20 is formed with a key insertion hole n extending in the axial direction, a side bar mounting hole 24, a tumbler storage chamber 25, and a stopper storage chamber 26.

As shown in FIGS. 1 and 2, the tumbler storage chamber 25 is
A plurality of partition plates 2B are assembled into a recess 27 formed in a substantially cubic shape, and the bottom portion communicates with the key insertion hole 23 and one of the sides communicates with the side bar mounting hole 24, respectively.

The partition plate 2B is formed of a flat plate whose upper portion has the same curved surface as the outer peripheral surface of the cylindrical portion 21. In the figure, a groove 28a having an arcuate cross section is formed on both sides of the upper center, and a notch 28b forming a part of the key insertion hole 23 is formed at the center of the bottom. Furthermore, a notch 28c is formed on the side facing the side bar mounting hole 24 when assembled into the inner cylinder 20, allowing the side bar 50 to be inserted therein. In this tumbler storage chamber 25, a tumbler 30, which is normally biased to the plunged state, is disposed so as to be able to freely go in and out of the key insertion hole 23.

The tumbler 30 is formed into a flat plate shape as shown in FIG. 30 is inserted, cutouts 33 are also formed on the sides facing the side bar mounting holes 24.

Further, a stopper storage chamber 26 is provided adjacent to the tumbler storage chamber 25, and the bottom thereof communicates with the key insertion hole 23, and the stopper 40 is normally biased to the plunged state.
is arranged so that it can freely go in and out of the key insertion hole 23.

Furthermore, as shown in FIG. 6, the inner cylinder 20 has at least one
The side pars 50 are provided so as to be freely protrusive and retractable along the generatrix direction (axial direction) so as to be orthogonal to the direction in which the tumbler 30 enters, and are urged to protrude by a spring 53. This side par 50 has a protruding portion 51 having a substantially semi-cylindrical shape, and a key portion 52 that fits inside has a flat plate shape that is thinly formed leaving the upper side in the figure. The key part 52 is formed to fit into the notch 33 of the tumbler 30 when a key is operated, but under normal conditions, the notch 33 is not aligned in a straight line, and the key part 52 does not fit in. .

In this sidebar cylinder lock A, the outer cylinder 10 is fixed to an object to be mounted, such as a drawer, which requires a lock. Then, by inserting the attachment/detachment key 61 whose tip is longer than the change key 60 into the inner cylinder 20, the stopper 40 is lifted and the notch 33 of the tumbler 30 is aligned in a straight line, so that the protrusion 51 of the side par 50 is removed. The inner cylinder 20 is made retractable and inserted into the inner circumferential surface 13 of the outer cylinder 10. By rotating the inserted inner cylinder 20 left and right, the protruding and biased side par 50 is moved into a circular cross-sectional groove (Fig. (not shown), and the protrusion 51 is engaged. at the same time,
For example, by attaching a hook or the like to the back side of the inner cylinder 20 and releasing the image synthesis between the hook or the like and the object to be fitted, the object to be fitted can be substantially locked or unlocked. Thereafter, by pulling out the attachment/detachment key 61, the tumbler 30 returns to a predetermined position and prevents the side par 50 from sinking into the inner tube 20. Furthermore, the stopper 40 descends and engages with the stepped portion 15 to prevent the inner cylinder 20 from separating from the outer cylinder IO.

Next, a method for manufacturing the inner cylinder of this sidebar cylinder lock will be explained.

The inner cylinder 20 is formed by die-casting zinc or the like, for example. At this time, the recess 26 forming the tumbler storage chamber 25
For molding, an integral block-shaped mold 70 is used.

The mold 70 shown in FIG. 3 has a substantially cubic shape, and the wall surfaces of the long sides 70a and 70a are formed in a rectangular wave shape in which recesses 71 with a rectangular cross section are continuous with the same distance. An arcuate protrusion 72 is formed on the upper part of the wall surface of the side portions 70b, 70b. Furthermore, both short sides 70b are provided at the center of the bottom.

A groove 73 with a rectangular cross section is formed passing through 70b.

As shown in FIG. 4, by placing the mold 70 in a predetermined position and injecting the molten raw material, a recess 2B communicating with the key insertion hole 23 and open to the surface of the inner cylinder 20 is formed. Here, in addition to accurate molding in which voids are less likely to occur, reliable extraction of the mold after molding (indicated by arrows in the figure) is possible, and a highly accurate recess 26 is formed.

As shown in FIG. 5, a partition plate 2B formed by molding, for example, zinc or resin is placed between the recesses 29 provided between the recesses 20 and facing the wall surface of the long side 20a. By fitting, a plurality of tumbler storage chambers 25 of the same shape surrounded by the partition plate 28 and the wall surface of the recess 20 are formed.

In this way, each tumbler storage chamber 25 includes a cubic recess 26 formed by the integral block-shaped mold 70,
It can be formed by dividing into a flat partition plate 28. Therefore, by using a mold that has high strength and a shape without constricted portions that make it difficult for raw materials to spread, it is possible to manufacture an inner cylinder that can reduce the defective rate and improve precision.

[Effects] As explained above, the side bar cylinder lock of the present invention is arranged in the inner cylinder which can be attached to and removed from the outer cylinder, and the key insertion hole extending in the axial direction and the key insertion hole so as to be freely inserted into and removed from the inner cylinder. In a side bar cylinder lock that has a plurality of tumbler storage chambers for individually storing a plurality of tumblers, the tumbler storage chamber is connected to a key insertion hole and has a recess that is open to the outer cylinder surface, and a plurality of tumbler storage chambers that are built into the recess. The tumbler storage chamber is formed by inserting the partition plates at a certain distance into a recess formed by an integral block-shaped mold. As a result, it is possible to easily manufacture the mold, prevent damage to the mold, and extend its life, and reduce costs by reducing the defective rate and improving precision of the product.

[Brief explanation of drawings]

1 to 7 show an embodiment of the present invention, and FIGS. 1 and 2 are perspective views of the inner cylinder of the side bar cylinder lock, and FIG.
is a perspective view of the inner cylinder and the mold, Fig. 4 is an explanatory diagram showing the inner cylinder formed by the mold, Fig. 5 is a perspective view of the molded partition plate, and Fig. 6 is a side bar cylinder lock. Explanatory drawings, FIG. 7 is a vertical sectional view of the side bar cylinder lock showing the key inserted state, FIGS. 8 to 10 show a conventional example, FIG. 8 is a perspective view of the inner cylinder and mold, and FIG. 9 FIG. 10 is an explanatory diagram showing the arrangement of the molds, and FIG. 10 is an explanatory diagram showing the inner cylinder formed by the molds. 23... Key insertion hole 25... Storage chamber 27... Recess 2B... Partition plate 30... Tumbler 70... Mold A... Side par cylinder lock

Claims (2)

[Claims] (1) An inner cylinder that can be attached to and removed from the outer cylinder has a key insertion hole extending in the axial direction, and a plurality of storage chambers that individually store a plurality of tumblers that are arranged in and out of the key insertion hole. In the formed side bar cylinder lock, each of the storage chambers is formed by a recess that communicates with the key insertion hole and opens onto the inner cylinder surface, and a plurality of partition plates built into the recess. Bar cylinder lock. (2) The method for manufacturing an inner cylinder according to claim 1, wherein the storage chamber is formed by fitting the partition plate into the recess formed by an integral block-shaped mold at a predetermined distance.