JP4238112B2 - Key cutting machine - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key cutting machine for producing a key having the same keyway as that of a key used for various locks such as an automobile lock and an entrance lock.

  As shown in FIG. 9, the conventional key cutting machine has a cutting blade 101 that is rotationally driven by a motor, a key sample B, and a key material A to be cut, and is positioned and fixed with respect to the cutting blade 101. And a table device 102 that moves in the direction perpendicular to the direction. As shown in FIG. 10, the key sample B has a plurality of key grooves 94 formed on one side edge of the key piece 92. On the other hand, the key material A has substantially the same outer shape as the sample B, and the key piece 90 is not engraved with a keyway. In the figure, reference numerals 91 and 93 denote the photographing plates for the key material A and the sample B.

  The table device 102 is provided on the machine base 103 so as to be able to reciprocate in a direction orthogonal to the cutting blade 101 (the direction indicated by the arrow P in FIG. 10), and on the upper surface of the support base 104. The moving table 105 is supported so as to be able to reciprocate in the front-rear direction (the direction indicated by arrow Q in FIG. 10) with respect to the cutting blade 101. On the upper surface of the moving table 105, a first fixture 106 for positioning and fixing the key material A so as to face the cutting blade 101 and a second tool for positioning and fixing the sample B so as to face the copying piece 108 are provided. The fixture 107 is provided. The copying piece 108 is for tracing the keyway 94 of the sample B, and is attached and fixed to the machine base 103.

  On the side surface of the moving table 105, the key material A for aligning the key material A and the sample B in accordance with the positional relationship between the cutting blade 101 and the copying piece 108 is set at the installation position of each fixture 106, 107. The positioning piece 110 and the positioning piece 111 of the sample B are attached to the front side so as to be raised and lowered. When the positioning pieces 110 and 111 are in the standing posture, the tip portions of the positioning pieces 110 and 111 come into contact with the key material A and the sample B fixed to the fixtures 106 and 107, respectively.

  When manufacturing the key with the above-described key cutter, the positioning pieces 110 and 111 are erected, and the leading ends of the positioning pieces 110 and 111 are formed between the key piece 90 of the key material A and the key piece 92 of the sample B. The key material A and the sample B are positioned and fixed by the fixtures 106 and 107 in a horizontal posture so as to be in the same position. Next, after each positioning piece 110, 111 is retracted by being moved forward, the cutting blade 101 is rotated, the support base 104 is moved in a direction orthogonal to the cutting blade 101, and the moving base 105 is moved in the front-rear direction. The side edge of the key piece 90 of the key material A is cut by the cutting blade 101 over almost the entire length while tracing the key groove 94 of the sample B by the copying piece 108. The same keyway as that of the sample B is cut in the key piece 90 of the key material A by such cutting.

  By the way, a unique number (hereinafter referred to as “lock number”) is set for each lock, and the lock manufacturer manages the lock and the key using this lock number. Therefore, if the lock number is known, it is possible to produce a matching key even if there is no sample. The production of a matching key from this lock number is particularly effective when the key is lost. Even if the key is lost, it is not always necessary to replace the lock.

  Since the type (structure) of the lock is specified by the lock number, the number, size, thickness, shape, position (interval), etc. of the disk are specified for a cylinder lock. As a result, the number of key grooves used for the lock and the position of the key groove are specified. Therefore, in preparation for key duplication, a key model is prepared in advance for each type of lock, and if the type of lock and the groove depth of each key groove of the key used for the lock are known from the lock number, the key The duplication and the production of the key are made possible.

  FIG. 11 shows a specific example of this type of key model C. In the figure, 95 is a key piece, and 96 is a photographic plate. A plurality of key grooves 97 are engraved on one side edge of the key piece 95 from a reference position 98 to a predetermined position (indicated by d1 to d10 in the figure) with the same groove width w and the same groove depth h. ing. The groove width w of each keyway 97 and the thickness of the copying piece 108 substantially coincide with each other, and the copying piece 108 can be inserted into and removed from each keyway 97.

Usually, the key has a groove depth of several stages (for example, 1 to 4 stages), and each stage is indicated by a numerical code (hereinafter referred to as “groove depth code”). . For example, if the groove depth code is “1”, the groove depth is 6 mm, 5 mm if “2”, 4 mm if “3”, 3 mm if “4”. The correspondence relationship between the groove depth code and the groove depth of the keyway is different for each type of lock.
If the groove depth code of each keyway is known, the keyway can be cut to the corresponding groove depth. Not only the type (structure) of the lock is specified by the lock number, but also the key used for the lock, that is, the groove depth of all the key grooves is specified. The depth is indicated by a code string (numerical string) in which the groove depth codes are arranged by the number of digits corresponding to the number of key grooves.

In the conventional key cutter, not only the sample B but also the key model C is set on the second fixture 107, so that the key can be produced from the lock number.
FIG. 12 shows a state in which the key material A and the key model C are aligned by the positioning pieces 110 and 111 in accordance with the positional relationship between the cutting blade 101 and the copying piece 108. In this state, the key groove 97 of the key model C is traced by the copying piece 108 to determine the position of the key groove to be cut with respect to the key material A, and the groove corresponding to the groove depth code at each key groove position. Cut the keyway with depth.

  The copying piece 108 is supported so as to be capable of reciprocating in the front-rear direction, and is biased toward the key model C by a spring 112. When the copying piece 108 hits the groove bottom of the key model C and is pushed, the copying piece 108 moves backward to a position where it comes into contact with the stopper 113. The displacement of the copying piece 108 corresponds to the groove depth of the key groove to be cut, and the position of the stopper 113 is set for each key groove according to the groove depth. The key-cutting machine is provided with a picture (not shown) that is rotated to move the stopper 113 in the front-rear direction. This picture shows the position of the stopper 113, that is, the key to be cut. A gauge with a scale for setting the groove depth of the groove is provided.

  The present invention has been developed based on the above-mentioned known or publicly used techniques without conducting prior art searches. Therefore, there is no prior art document information to be described.

  However, in the key cutter with the above-described configuration, in order to form a key groove having a groove depth corresponding to the groove depth code at the position of the key material A corresponding to the position of each key groove 97 of the key model C, the gauge Therefore, it is necessary to rotate the image by an amount corresponding to the depth of the groove to be cut. For this purpose, the groove depth of the key groove corresponding to the groove depth code (operation amount of shooting) is stored, or a comparison table for converting the groove depth code into the groove depth of the key groove is provided. It is necessary to check each time. However, since the corresponding relationship between the groove depth code and the key groove groove depth is different for each type of lock, it is difficult to memorize the key groove groove depth corresponding to the groove depth code for all locks. . For this reason, every time the key is manufactured, it is necessary to proceed with the key groove cutting operation while looking at the corresponding comparison table and adjusting the shooting, so that there is a problem that work efficiency is remarkably deteriorated and it takes time to manufacture the key.

  The present invention has been made by paying attention to the above-mentioned problems, and can be adjusted for shooting without looking at the comparison table for converting the groove depth code to the groove depth of the key groove when manufacturing the key. Thus, an object of the present invention is to provide a key cutting machine that improves the work efficiency and greatly reduces the number of steps required to manufacture the key.

The key cutting machine according to the present invention uses a key model prepared for each key type for a key whose depth is specified stepwise by a groove depth code, and uses the same keyway as the key model. A key is made by cutting the same number of key grooves as the key model so that the groove depth matches the position of the key, and a rotatable cutting blade for cutting the key material and the key model. A copying mechanism having a copying piece that traces the key groove, a first fixture for positioning and fixing the key material facing the cutting blade, and a second for positioning and fixing the key model facing the copying piece. And fixtures. Each of the first and second fixtures is provided so as to be able to reciprocate integrally in the front-rear direction and the direction perpendicular to the cutting blade and the copying piece.
The copying mechanism includes a support frame that supports the copying piece so as to reciprocate in the front-rear direction, a spring that urges the copying piece toward the key model, and a groove in the keyway that is to cut back the copying piece. A stopper that stops at a position according to the depth, a shooting that is rotated to set the position of the stopper to a position according to the groove depth of the keyway to be cut, and the shooting and the stopper Select between multiple types of keys with different correspondences between the conversion mechanism provided between them and converting the rotational movement of the shooting into a reciprocating movement and transmitting it to the stopper, and the groove depth of the keyway and the groove depth code. And a gauge for each type of key used . Wherein the knob, both the gauge portion expressed by scale number is attached showing a groove depth of keyway the turning operation amount of the operation portion and the knob for rotating operation is provided, the operation unit An attachment part is provided between the gauge part and the gauge part so that the gauge can be attached and detached . In each of the gauges described above, the amount of rotational operation for shooting is represented by a scale with a groove depth code that has a different relationship with the groove depth of the key groove for each type of key. An indicator plate on which a reference line for aligning the scales of the gauge part and the gauge is shown is installed above the gauge part .

In the above-described configuration of the present invention, if the type of lock is different, the step value of the groove depth of the key groove of the key is also different. Prepare a gauge in the box and select and set the appropriate gauge according to the lock number. In this case, the gauge is detachably attached to the photograph .

In order to produce a lock key from a lock number using the lock key cutting machine having the above-described configuration, first, a key material is positioned by a first fixing tool, and a key model is positioned and fixed by a second fixing tool. Next, taking a picture while viewing the gauge, the position of the stopper is set according to the groove depth of the first keyway to be cut. In this case, the groove depth of each keyway is clear from the lock number by the code, and the code is attached to the scale of the gauge, so the position where the corresponding code is attached by operating the shooting Set to the set position. Next, the key model and the key material are moved together, and the copy is introduced into the first keyway of the key model. When the copy piece comes into contact with the groove bottom, the cutting blade hits the key material, and thereafter, the copy piece is pushed and moves until it hits the stopper. The key material is cut by a groove depth corresponding to this moving distance.
By executing the same operation and work for all the keyways of the key model, it is possible to produce a key with a lock number.

  According to the present invention, at the time of manufacturing the key, it is possible to adjust the shooting without looking at the comparison table for converting the code capable of specifying the groove depth of the key groove into the groove depth. And the number of steps required to produce a key can be greatly reduced.

FIG. 1 and FIG. 2 show the appearance of a key cutting machine that is one embodiment of the present invention.
The illustrated key cutter has a casting machine base 1 composed of a front wall part 11 and left and right side wall parts 12, 13, and a cutting blade 2 is vertically oriented on the front wall part 11 of the machine base 1. Is provided. The cutting blade 2 is rotationally driven by a motor 20 incorporated in the front wall portion 11.

  Between the side walls 12 and 13 of the machine base 1, two support shafts 31 and 32 for supporting the support base 3 freely in a reciprocating horizontal movement in a direction P perpendicular to the cutting blade 2, and a handle 30. The ball screws 33 that rotate the shaft by the above operations are installed in parallel. The ball screw 33 meshes with a nut (not shown) incorporated in the support base 3, and the support base 3 reciprocates in the direction P perpendicular to the cutting blade 2 by the axial rotation of the ball screw 33.

  Two support shafts 41 and 42 for supporting the movable table 4 freely in a reciprocating horizontal movement in the front-rear direction Q with respect to the cutting blade 2 are installed on the support table 3 in parallel. A compression spring 43 that biases backward is attached. The movable table 4 is pushed away from the cutting blade 2 by the spring force of the compression spring 43. If the movable table 4 is pushed against this spring force, the movable table 4 can be moved toward the cutting blade 2. it can.

On the upper surface of the moving table 4, a first fixing tool 5A for positioning and fixing the key material A so as to face the cutting blade 2, and a copying piece 60 of the copying mechanism 6 in the rear position of the first fixing tool 5A. And a second fixture 5C for positioning and fixing the key model C facing each other.
Each of the fixtures 5A and 5C includes a pair of upper and lower clamping plates 51 and 52 for clamping the key material A and the key model C in a horizontal posture in which the plate surfaces face the vertical direction. When the photographing 53 is turned, the key material A and the key model C are sandwiched between the clamping plates 51 and 52 and fastened and fixed.
The support table 3 and the moving table 4 configured as described above constitute a table device that positions and fixes the key material A and the key model C and moves the cutting material 2 and the copying piece 60 in the front-rear direction Q and the orthogonal direction P thereof. To do.

A convex wall portion 14 projecting rearward is integrally formed on the front wall portion 11 of the machine base 1. A scanning mechanism 6 having a scanning piece 60 that traces the keyway of the key model C is provided at the tip of the convex wall portion 14.
As shown in FIG. 3, the copying mechanism 6 includes a support frame 61 that supports the copying piece 60 so as to reciprocate in the front-rear direction Q, a spring 63 that urges the copying piece 60 toward the key model C, And a stopper 64 for stopping the copying piece 60 from retreating. The copying piece 60 is formed into a pointed shape or a thin plate with a constant width so that the contact portion 60a at the tip can be inserted into and removed from each key groove 97 of the key model C. The base end portion of the copying piece 60 is supported in a support hole 62 of the support frame 61 so as to be able to reciprocate.

The support frame 61 is obtained by covering a main body 61a with a lid 61b. As shown in FIGS. 4 and 5, the support hole 62 is formed on the lid 61b side. The stopper 64 is also supported by the support hole 62 of the lid portion 61b so as to be able to reciprocate. One end of the spring 63 is supported on the distal end portion of the stopper 64, and the other end is supported on the proximal end portion of the copying piece 60.
The copying piece 60 moves backward from the most protruding state until it hits the stopper 64. This moving distance L corresponds to the groove depth of the keyway to be cut. The position of the stopper 64 is changed back and forth by the operation of the shooting 7 described later to change the groove depth of the keyway to be cut.

  The copying mechanism 6 further includes a shooting 7 that is operated to set the position of the stopper 64 according to the groove depth of the keyway to be cut, and a gauge that indicates the operation amount of the shooting 7 with a scale. 8 and so on. A conversion mechanism 70 is provided between the camera 7 and the stopper 64 to convert the rotational motion of the camera 7 into a reciprocating linear motion and transmit it to the stopper 64.

As shown in FIG. 3, the conversion mechanism portion 70 includes a rotation shaft 71 that is rotatably supported by a through hole 66 that penetrates the main body portion 61 a of the support frame 61. A photograph 7 is attached, and a cam shaft 72 having a diameter larger than that of the rotary shaft 71 is integrally formed at the other end.
A spiral cam groove 73 as shown in FIG. 6 is formed on the tip surface of the cam shaft 72. An engaging pin 65 protruding from the upper surface of the stopper 64 is engaged with the cam groove 73. When the cam shaft 72 pivots integrally with the rotary shaft 71, the cam groove 73 pushes and displaces the engaging pin 65 in the front-rear direction Q indicated by the arrow in the figure, so that the stopper 64 reciprocates along the support hole 62. Moving.

  The photographing 7 is one in which an operation portion 74 whose outer peripheral surface is knurled and a gauge portion 75 whose scale is expressed on the outer peripheral surface are integrally formed. As shown in FIG. 7, the gauge portion 75 indicates the depth of the keyway on a scale of 1/10 mm. A transparent indicator plate 77 showing a reference line 76 is installed above the gauge portion 75, and the scale of the gauge portion 75 and the scale of the gauge 8 to be described later are aligned with the reference line 76. Yes. In the illustrated example, the scale of “5 mm” of the gauge portion 75 is aligned with the reference line 76, and “5 mm” is set as the groove depth of the keyway to be cut. Note that the gauge portion 75 does not necessarily have to be formed integrally with the shooting 7 and may be detachably attached to the shooting 7 or the rotary shaft 71.

  The photographing 7 is provided with an attachment portion 78 having a predetermined width between the operation portion 74 and the gauge portion 75 to which the gauge 8 can be attached in a removable manner. The gauge 8 shows the amount of rotation of the shooting 7 on a scale. The scale has a step value of the groove depth that can specify the groove depth of the key groove, that is, the above-mentioned scale. Groove depth codes ("1" to "4" in the illustrated example) are attached.

In the specific example shown in FIG. 7, the groove depth of the key groove with the groove depth code “1” is “6.4 mm”, and the groove depth with the groove depth code “2” is “5. The groove depth of “7 mm”, the groove depth code “3” is “5.0 mm”, and the groove depth of the groove depth code “4” is “4.3 mm”. In the illustrated example, since the reference line 76 is aligned with the scale of the groove depth code of the gauge portion 75 being “3”, the groove depth of the key groove to be cut is “5 mm”, and the moving distance of the stopper 64 is 5 mm.
If the type of the lock is different, the corresponding relationship between the groove depth code and the groove depth of the keyway is also different. Therefore, a gauge 8 is prepared for each type of lock (key), and the corresponding gauge 8 according to the lock number. Is selected and attached to the attachment portion 78 of the shooting 7. In FIG. 3, 79 is a screw hole for fixing the photographing 7 to the rotating shaft 71, and 81 is a screw hole for fixing the gauge 8 to the rotating shaft 71.

  A positioning piece 50A for positioning the key material A on the first fixing tool 5A, and a position of the second fixing tool 5C are provided on one side surface of the support 3 at the position of the first fixing tool 5A. In addition, positioning pieces 50C for positioning the key model C are attached to the front side so as to be freely raised and lowered. Each positioning piece 50A, 50C is for aligning the key material A and the key model C in the length direction in accordance with the positional relationship between the cutting blade 2 and the copying piece 60.

In order to produce a lock key from the lock number using the lock key cutting machine having the above-described configuration, first, the key material A is set by the first fixing tool 5A, the key model C is set by the second fixing tool 5C, and the positioning piece 50A. , 50C is used to position and fix at an appropriate position, and then the cutting blade 2 is rotated.
Next, the photographing 7 is rotated while viewing the gauge 8, and the position of the stopper 64 is set according to the groove depth of the first keyway to be cut. In this case, the groove depth of each key groove is obvious from the lock number by the code string of the groove depth code, and the code is attached to the scale of the gauge 8, so that the photographing 7 is rotated. The position where the corresponding groove depth code is attached is aligned with the reference line 76 of the transparent indicator plate 77.

For example, when the shooting 7 is rotated so that the scale position where the groove depth code is “1” is on the reference line 76 of the indicating plate 77, as shown in FIG. Located behind, the moving distance L of the copying piece 60 is the largest.
Next, the handle 30 is operated to move the support base 3 in a direction perpendicular to the copying piece 60 and the cutting blade 2, and the moving table 4 is moved against the spring force of the compression spring 43. The key material A and the key model C are moved together by pushing in the direction of the blade 2. When the copying piece 60 is introduced into the first key groove 97 of the key model C and brought into contact with the groove bottom, the cutting blade 2 hits the key material A and starts cutting. Cutting of the key material A is continued until the copying piece 60 hits the stopper 64. When the copying piece 60 hits the stopper 64 (see FIG. 8B), the cutting of the key groove is completed, and the key material A is formed with a key groove having a groove depth corresponding to the moving distance L of the stopper 64. The
By executing the same operation and work for all the key grooves 97 of the key model C, the production of the key with the lock number is completed.

  FIGS. 8 (3) and (4) show the position of the stopper 64 when the shooting 7 is set to another groove depth code and the state when the copying piece 60 hits the stopper 64, respectively. . The movement distance L of the copying piece 60 is reduced according to the position of the stopper 64, and a key groove having a groove depth corresponding to the movement distance is generated.

It is a side view of the key cutter which is one example of this invention. It is a top view of the Example of FIG. It is sectional drawing which shows the structure of a copying mechanism. It is a side view which shows the internal structure of the cover part of a support frame. It is sectional drawing which shows the internal structure of the cover part of a support frame. It is a side view of the main-body part of a support frame when a cover part is removed. It is a top view which expands and shows a taken gauge part and a gauge. It is a side view of the cover part which shows operation | movement of a copying piece. It is a side view of the conventional key cutter. It is explanatory drawing which shows the state in which the key raw material and the sample were positioned. It is a top view of the model of a key. It is explanatory drawing which shows the state in which the key material and the key model were positioned.

Explanation of symbols

A Key material C Key model 2 Cutting blade 5A First fixing tool 5C Second fixing tool 6 Copying mechanism 7 Shooting 8 Gauge 60 Copying piece 61 Support frame 63 Spring 64 Stopper

Claims (1)

For keys whose keyway depth is specified stepwise by the groove depth code, using the key model prepared for each key type, the groove depth matches the same keyway position as the key model. In the key cutter, which cuts the same number of keyways as the key model to produce the key,
A rotatable cutting blade for cutting the key material, a copying mechanism having a copying piece that traces the keyway of the key model, and a first fixture for positioning and fixing the key material facing the cutting blade; A second fixing tool for positioning and fixing the key model so as to face the copying piece, and the first and second fixing tools are orthogonal to the front and rear directions with respect to the cutting blade and the copying piece. It is provided so that it can reciprocate integrally with the direction,
The copying mechanism includes a support frame that supports the copying piece so as to reciprocate in the front-rear direction, a spring that urges the copying piece toward the key model, and a groove in the keyway that is to cut back the copying piece. A stopper that stops at a position according to the depth, a shooting that is rotated to set the position of the stopper to a position according to the groove depth of the keyway to be cut, and the shooting and the stopper Select between multiple types of keys with different correspondences between the conversion mechanism provided between them and converting the rotational movement of the shooting into a reciprocating movement and transmitting it to the stopper, and the groove depth of the keyway and the groove depth code. And a gauge for each type of key used, and for the shooting, a scale with an operation part for rotating operation and a rotation operation amount of the shooting with a number indicating a groove depth of the keyway with a gauge portion is provided represented by the gate between the operation portion and gauge portion Provided mounting portion capable of mounting a di detachably exchangeably, to each gauge, the rotary operation of knob is Chigae the correspondence between the groove depth of the key groove for each type of key groove It is represented by a scale with a depth code,
A key-cutting machine in which an indicator plate on which a reference line for aligning the gauge part and each scale of the gauge is installed at an upper position of the gauge part .

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