Manual watch assembly device

Abstract

To provide a manual clock assembly device which applies smooth vibration and enables various clocks to be assembled by a single assembly device. [Solution] A timepiece assembling device 1 for assembling a timepiece in which one end of a gear shaft is fitted into a base plate and the other end of the shaft is fitted into a receiver that covers the base plate to rotatably support the gears. The device is equipped with a mounting base 3 on which the base plate is placed, a variable vibration unit 4 that is attached to the mounting base 3 so that it can vibrate and can change the vibration frequency in accordance with the precision of the gears, and an elastic body 5 that is attached to the variable vibration unit 4 and suppresses the displacement of the amplitude of the variable vibration unit 4.

Description

[Technical field]

[0001] This invention relates to a timepiece assembly device that utilizes vibration to fit gear shafts into receivers. [Background technology]

[0002] Traditionally, when manufacturing or overhauling a watch, the watch is assembled by placing the main plate on an assembly device, fitting one end of the gear shaft into the main plate, and fitting the other end into a receiver that fits over the main plate. The hole in the main plate's jewel into which the gear shaft fits is slightly larger than the thickness of the gear shaft, so when the gear is fitted into the main plate, it is slightly tilted from the vertical. Due to this tilt, when the receiver is placed over the main plate, the gear shaft cannot be fitted into the receiver's jewel hole, and work to correct the gear tilt is required.

[0003] In order to correct this tilt, the inventor devised a "watch assembly device" and obtained a utility model registration (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3233185 Summary of the Invention [Problem to be solved by the invention]

[0005] This watch assembly device has a variable vibration unit attached to a mounting base, the main plate, gears, and receivers of the watch are placed on the mounting base, vibrations of a frequency that matches the precision of the gears of the watch to be assembled are applied from the variable vibration unit, and the gear shaft is fitted into the receiver that is placed over the main plate. When vibrating the variable vibration unit manually in this watch assembly device, there is a risk that the amplitude will increase due to the force applied to the hand.

[0006] The present invention is an improvement over the above-mentioned "watch assembly device," and aims to provide a watch assembly device that can suppress the change in the amplitude of vibration caused by the variable vibration section and apply smooth vibrations to the base plate, gears, and bridges of the watch. [Means for solving the problem]

[0007] The present invention is a watch assembly device in which one end of a gear shaft is fitted into a base plate and the other end of the shaft is fitted into a receiver that covers the base plate to rotatably support the gear, and is characterized by comprising a mounting base on which the base plate is placed, a variable vibration unit that is attached to the mounting base so that it can vibrate and can change the vibration frequency to match the accuracy of the gear, and an elastic body that is attached to the variable vibration unit and suppresses displacement of the amplitude of the variable vibration unit. Effect of the Invention

[0008] The watch assembly device of the present invention has an elastic body attached to the variable vibration section, so that by suppressing the displacement of the vibration amplitude, it is possible to apply smooth vibrations to the base plate, gears, and bridges of the watch placed on the mounting base. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view showing a timepiece assembly device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a perspective view showing the assembly device in an expanded state. [Diagram 3] FIG. 1 shows high and low precision gears. [Figure 4] FIG. 11 is a cross-sectional view showing a state in which the base plate into which the gear is fitted is covered with a receiver. [Diagram 5] 11A to 11C are diagrams showing a method of assembling high-precision gears into a timepiece using the assembly device. [Figure 6] 11A to 11C are diagrams showing a method of assembling high-precision gears into a timepiece using the assembly device. [Figure 7]11A to 11C are diagrams showing a method of assembling low-precision gears into a timepiece using the assembly device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Figures 1 and 2 show a timepiece assembling device 1 of the present invention, and Figure 2 shows the assembled device 1 of Figure 1 in an expanded state. The assembly device 1 is equipped with a mounting base 3 on which a main plate of the timepiece is placed, a variable vibration unit 4 attached to the mounting base 3 and which applies vibration to the mounting base 3, and an elastic body 5 attached to the variable vibration unit 4 and which suppresses the displacement of the amplitude of the variable vibration unit 4.

[0011] The mounting table 3 is formed in a hollow box shape, and is formed so as to be separable from the center into an upper lid portion 31 and a lower storage portion 32. In Fig. 2, the lid portion 31 is drawn upside down, and the variable vibration portion 4 is composed of a bolt 41 attached to a top portion 31a of the lid portion 31 (top portion within the mounting table 3) and a slider 42 attached to an inner bottom surface 32a of the storage portion 32 (bottom portion within the mounting table 3).

[0012] The bolt 41 is cylindrical and has a screw groove 43 formed over the entire length of its side circumferential surface, with a portion of the side circumferential surface fixed to the top 31a of the cover 31. The slider 42 includes a slide rail 42a and a slide portion 44 that is slidably guided by the slide rail 42a. The slider 42 may be, for example, a linear multipurpose slide rail (C2420-70) manufactured by Sugatsune Kogyo Co., Ltd.

[0013] The bottom surface of the slide rail 42a is attached to the inner bottom surface 32a of the storage section 32, and an elastic body 5 made of a spring plate is attached to the upper surface of the slide section 44 of the slider 42. This elastic body 5 is flat, and both ends 51, 51 are fixed to both ends in the sliding direction of the slide section 44 of the slider 42 with screws 45, 45. The center of the elastic body 5 is formed with a convex portion 46 that is bent upward (to the top inside the mounting table 3) in a mountain shape.

[0014] The bolt 41 is attached to the top 31a of the cover portion 31 so as to be in a vertical line with the sliding portion 44 of the slider 42 along the sliding direction of the sliding portion 44 of the slider 42, and the bolt 41, slider 42, and elastic body 5 are arranged within the mounting table 3 so that the central convex portion 46 of the elastic body 5 contacts the thread groove 43 of the bolt 41.

[0015] A rod-shaped lever 47 that penetrates and protrudes through the mounting base 3 is attached to the upper center in the sliding direction of the sliding portion 44 of the slider 42. Corresponding to this lever 47, an opening 33 that extends in the sliding direction of the sliding portion 44 is formed on one side of the storage section 32 of the mounting base 3, and the lever 47 protrudes outward from the mounting base 3 through this opening 33.

[0016] The base end of this lever 47 is inserted into the space between the slide portion 44 and the central protrusion 46 of the elastic body 5, and is fixed to the slide portion 44. A gripping portion 48 having a larger diameter than the lever 47 is attached to the tip of the lever 47.

[0017] A flat support portion 49 is attached to the inner bottom surface 32a of the storage portion 32 of the mounting table 3. The support portion 49 is provided between the inner bottom surface 32a of the storage portion 32 and the lever 47, and is formed to a size such that the upper surface of the support portion 49 comes into contact with the lever 47. For this reason, the lever 47 cannot swing downward.

[0018] Since the watch assembly device 1 is configured in this way, when the gripping portion 48 of the lever 47 is gripped and the lever 47 is rotated back and forth in the sliding direction, the slider 42 slides, and the elastic body 5 also slides accordingly. Since the central convex portion 46 of the elastic body 5 is in contact with the thread groove 43 of the bolt 41, vibrations are generated in the elastic body 5 and the bolt 41, and these vibrations are applied to the mounting base 3. And when the speed of the reciprocating movement of the lever 47 is changed, the mounting base 3 vibrates at a frequency (Hz) proportional to the speed of the reciprocating movement. The change in the amplitude of this vibration is suppressed by the elastic body 5 (details will be described later).

[0019] A method of using the thus constructed watch assembly device 1 will be described with reference to Figs. 3(a) and (b). As shown in Fig. 3(a), the main plate 2 is placed on the mounting table 3, one end of the shaft of the gear 7 is fitted into the multiple hole jewels 21 of the main plate 2, and the receiver 8 is placed on the main plate 2. Then, as shown in Fig. 3(b), the gripping part 48 of the lever 47 is held by the left hand and the gripping part 48 is moved back and forth in the sliding direction, so that the central convex part 46 of the elastic body 5 rubs against the multiple thread grooves on the lower side of the bolt 41, and the vibrations generated by the rubbing are applied to the mounting table 3. When the mounting table 3 vibrates, the mounted main plate 2, gear 7, and receiver 8 also vibrate, and the other end of the shaft of the gear 7 fits into the hole jewels 81 of the receiver 8, and the watch is assembled.

[0020] Next, the structure of this gear 7 will be explained with reference to Figures 4(a) and (b). The gear 7 is composed of a disk 71 with multiple teeth and a shaft 72 that passes through the center of the disk 71. The shaft 72 is composed of a thick axle 73 that protrudes from the disk 71 and a thin tenon 74 that protrudes further from the axle 73 and fits into the hole of the hole stone. The precision of the tenon 74 varies depending on the model of the gear, and gears with low precision have a gouge 75 at the base end as shown in Figure 4(b), making the thickness of the tenon 74 thin. In addition, some gears have a state as shown in Figures 4(a) to (b) due to wear over many years. The high and low precision of the gear of the present invention refers to the high and low precision of the tenon, and the thickness of the tenon is determined by whether or not there is a gouge.

[0021] In the case where the gear 7 has high precision as shown in Fig. 4(a), when the gear 7 is fitted into the hole of the holed stone 21 of the main plate 2 as shown in Fig. 5(a), the gear 7 will tilt slightly because the hole of the holed stone 21 is slightly larger than the tenon 74. The tip of the tenon 74 will be slightly misaligned with respect to the hole of the holed stone 81 of the receiver 8.

[0022] On the other hand, if the precision of the gear 7 is low as shown in Figure 4(b), when the gear 7 is fitted into the hole of the hole stone 21 of the main plate 2 as shown in Figure 5(b), the gear 7 will be significantly tilted due to the recess 75 of the tenon 74, and the tip of the tenon 74 will be significantly misaligned with respect to the hole of the hole stone 81 of the support 8.

[0023] Next, the assembly method of the timepiece in the case of high accuracy and the case of low accuracy will be explained with reference to FIG. 6 to FIG.

[0024] When the precision of the gear 7 is high, as shown in Fig. 6(a), the tenon 74 of the shaft of the gear 7 is fitted into the hole of the hole stone 21 of the main plate 2, and the receiver 8 is placed over the main plate 2. Then, as shown in Fig. 6(b), when the gripping portion 48 of the lever 47 is gripped and slowly rotated back and forth in the sliding direction, a low-frequency vibration is applied to the mounting table 3.

[0025] At this time, as shown in FIG. 6(c), when the convex portion 46 of the elastic body 5 moves near the thread of the screw groove 43 of the bolt 41, both ends 51, the vicinity of 51 bulge upward, and the convex portion 46 curves and is crushed downward. When the convex portion 46 of the elastic body 5 passes over the thread, the convex portion 46 returns to its normal mountain shape. By repeatedly crushing and restoring this convex portion 46, the elastic body 5 and the bolt 41 are rubbed with a constant force, and the displacement of the amplitude of the generated vibration is suppressed. Since the displacement of the amplitude of the vibration of the variable vibration unit 4 is suppressed, the speed A smooth vibration is applied to the mounting table 3.

[0026] When the mounting base 3 vibrates smoothly and at a low frequency, the plate 2, gear 7, and bridge 8 placed on it also vibrate smoothly at a low frequency. If vibration is continued, as shown in Figure 6(d), the tip of the tenon 74 of the gear 7 fits into the hole jewel 81 of the bridge 8, and the bridge 8 sinks downward, and the watch is assembled.

[0027] On the other hand, when the precision of the gear 7 is low, as shown in Fig. 7(a), the tenon 74 of the shaft of the gear 7 is fitted into the hole of the hole jewel 21 of the main plate 2, and the bridge 8 is placed over the main plate 2, in the same manner as when the precision is high. Then, as shown in Figs. 7(b) and (c), the gripping part 41 of the lever 47 is gripped and the gripping part 41 is quickly rotated back and forth in the sliding direction, and smooth vibrations with a high frequency are applied to the main plate 2, the gear 7, and the bridge 8 through the mounting base 3. If vibrations are continued, as shown in Fig. 7(d), the tip of the tenon 74 of the gear 7 fits into the hole jewel 81 of the bridge 8, and the bridge 8 sinks downward, and the watch is assembled.

[0028] In the timepiece assembling device 1 of the present invention, smooth vibrations are applied from the variable vibration section 4 through the mounting table 3 to the main plate 2, gear 7, and bridge 8, so that sudden vibrations of large amplitude are not applied to the main plate 2, gear 7, and bridge 8. If sudden vibrations of large amplitude are applied, there is a risk that the tenon 74 of the gear will come off the hole jewel 21 of the main plate 2 or the bridge 8 will become misaligned, but in the assembling device 1 of the present invention, such things will not happen because sudden, rapid external forces are not applied.

[0029] 6 and 7, the timepiece assembly device 1 of the present invention can assemble timepieces of any precision by reducing the frequency of the vibration applied when the precision of the gear 7 is high, and increasing the frequency when the precision is low. In other words, by changing the reciprocating speed of the slider 42 according to the precision of the gear 7, various models of timepieces can be assembled. [Explanation of symbols]

[0030] 1 Assembly equipment 2 Main plate 3. Placement table 4 Variable vibration section 5 Elastic body 7. Gears 8. Reception 21 Anaishi 31 Lid 31a Top 32 Storage unit 32a Inner bottom surface 33 Opening 41 Volts 42 Slider 42a Slide rail 43 Thread groove 44 Slide section 45 Screw 46 Convex 47 Lever 48 Gripping part 49 Support part 51 End 71 Disc 72 Axis 73 Mandrel 74 Mortice 74 Gouge 81 Anaishi

Claims

1. A timepiece assembling device for assembling a timepiece in such a manner that one end of a gear shaft is fitted into a main plate and the other end of the shaft is fitted into a receiver that is placed over the main plate, thereby rotatably supporting the gear, A manual watch assembly device comprising: a base on which the base plate is placed; a variable vibration unit attached to the base so as to be able to vibrate and capable of changing the vibration frequency in accordance with the precision of the gear; and an elastic body attached to the variable vibration unit and suppressing the change in amplitude of the variable vibration unit.

2. The manual watch assembly device according to claim 1, characterized in that the mounting base is formed in a box shape, the variable vibration unit is composed of a slider attached to the bottom of the mounting base and a bolt attached to the top of the mounting base and having a threaded groove, the elastic body is attached to the top of the slider and abuts against the bolt, and vibration is generated when the threaded groove of the bolt comes into contact with the elastic body as the slider slides.

3. The manual watch assembly device according to claim 2, characterized in that the elastic body is a flat spring plate, both ends of which are attached to the slider, and the central part is bent in a mountain shape toward the top of the mounting table so as to contact the thread groove of the bolt.

4. The manual assembly device for a watch as described in claim 2 or 3, characterized in that the slider has a lever that penetrates the mounting base and protrudes outward, and the mounting base has a flat support portion between the bottom of the mounting base and the lever, which prevents the lever from swinging toward the bottom.

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