JPS6066738A - Fluid control block - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

The present invention relates to a fluid control block used in a dental treatment device. Many dental medical institutions have traditionally used dental treatment devices that use handpieces that perform dental treatment by driving and rotating a grinding tool using an air turbine. Due to the need to use different handpieces, many dental treatment devices are equipped with multiple handpieces. However, the conventional device has a structure as shown in Fig. 1, for example, with drive air 4- for driving the air turbine supplied to the air turbine of each handpiece, chip air for blowing off grinding debris, and cooling the tooth to be ground. The transition from the state where the supply of cooling water to the cooling water is stopped to the supply state is achieved by changing the state in which the hand piece ■ is removed from the hanger valve II from being locked to the state, thereby changing the air flow path from the communicating state to the atmosphere open state. When the pressure of Pyrowa i air is reduced by valve 11, the flow path switching type handle is

[Air valve I11 that allows the two flow paths to flow
Therefore, if one hand heath (■) is being used and another hand heath (1) is removed from the hanger valve 11, drive air etc. will also be supplied to the hand piece (1) that was later removed from the hanger valve (II) and the grinding will be carried out. Since the tool is driven to rotate and cooling water is blown out, when replacing the grinding tool attached to another hand heath while one handpiece is in use, all hanger valves 11 must be replaced with handpiece 1. This has the disadvantage that the work is complicated and dental treatment takes time. The inventor of the present invention has conducted extensive research to solve these drawbacks, and has found that by combining a conventional device with an air-controlled on-off valve and a check valve, the device drives only the hand heath where the hand is first removed from the valve. It was discovered that it was possible to create a dental treatment device in which air, etc. was supplied, and drive air, etc. was not supplied to the handpiece that was later removed from the hanger valve, and was previously published in Japanese Patent Application No. 1137-1983.
In a dental treatment apparatus using a plurality of handpieces, as shown in FIG. 2 as No. 6, when each handpiece is removed from the locked state,
・A flow path switching type hand valve that moves the air flow path from a communication state to an open state to the atmosphere and reduces the pressure of pilot air supplied to the air valve described later, and a drive air supply that is supplied to each handpiece. Compatible with the air valve that changes the flow path of chip air and cooling water from a blocked state to a state where it can flow when the pressure of the Pyrowa i air supplied from the hanger valve that is locked to each hand piece decreases, and each hand heath. When the pressure of the air to the pyrower 1 corresponding to the hand heath, which is provided in the pilot air flow path between the air valve and the valve, decreases, the flow path corresponding to the remaining hand piece changes from the flowing state to the closed state. A dental treatment characterized by being provided with an air control on-off valve that moves and a check valve that is provided in parallel with each air control on-off valve and allows air to flow only in the direction from the air valve to the air valve. proposed a device. Initial effects can be obtained by manufacturing the above invention using commonly available air-controlled on-off valves and check valves, but as the number of handpieces increases, the number of tubes connecting each valve increases. This method has the drawback that the large number of tubes required for connection requires a great deal of effort and expense, and that it also causes air disconnection. As a result of further intensive research, the inventor of the present invention discovered the existence of a valve with the structure shown in Figure 3, which performs the functions of an air control on-off valve and a check valve at the same time. They succeeded in incorporating this into the block and completed the fluid control block according to the present invention. In other words, the present invention provides a method for shifting the pilot air flow path from a communicating state to an open state to the atmosphere when each hand piece in a dental treatment device using n hand pieces (three or more) is removed from a locked state. A flow path switching type hanger valve that lowers the pressure of the pilot air, and a flow path of the cooling water in the drive air and tip air that is supplied to the hand piece that is removed from the hanger valve when the pilot air pressure decreases from the blocked state. The following 11 elements are used to make it possible to supply drive air, tip air, and cooling water only to the handpiece that is installed in the pilot air flow path between the air valve and is removed from the hanger valve first. A fluid control block for a dental equipment safety circuit, characterized by comprising: (a) a plunger with a small diameter portion protruding above the large diameter portion at the bottom; (b) a disc; The above-mentioned plate is inserted loosely into the upper surface of the plate (c), and an 8-plate chamber is bored, and the large diameter portion of the flange is loosely inserted downward corresponding to the plate chamber. N rows of +n-11 plunger holes are formed, each consisting of a diameter hole and a small diameter hole that is loosely fitted to allow the tip of the small diameter portion of the plunger to protrude into the plate chamber. Connect the centers of the plunger holes arranged in (n-1)llffi corresponding to the hand heath, and connect them from one side located on the S plane extension line to the large diameter hole of the plunger hole closest to this one side. An air valve side flow path is bored, and a hanger valve side flow path is provided to communicate the side surface opposite to the above-mentioned - side surface and the plate air on the side closest to the side surface, and the hanger valve side flow path The plate chamber, excluding the plate chamber communicating with Plate 1, and the plunger hole connected to the lower part of the chamber communicate with the large diameter hole of the plunger hole adjacent to the valve side to form a communication flow path. A lower main block is provided with a pilot air flow path from one of the flow paths provided in the row corresponding to each handpiece to the upper surface, and (iv) a lower main block. When the plunger inserted into the plunger hole is pushed up, an O-ring is installed at the base of the small diameter part of the plunger to cut off communication between the plate chamber and the large diameter hole of the plunger hole. (E) a spring that always presses upward the plunger inserted into the plunger hole of the lower main block; (f) a lower cover block that is disposed on the lower surface of the lower main block via a gasket and supports the lower end of the spring; (1) ) A flexible membrane that is placed on the lower main block and is bent by the pressure of the air chamber of the upper main block to press the plate that is loosely inserted into the plate chamber of the lower main block, (h) lower part. Through-flow channels are disposed on the main block through a flexible membrane and communicate with each pilot air flow path in the lower main block, and are bored from the bottom surface to the top surface, and are connected to the plate through the flexible membrane. The upper main block has independent air chambers drilled on the lower surfaces of the opposing positions, and a communication hole is provided through the air chambers on the upper surface. A communication path is formed that communicates the through-flow path provided in the main block with one air chamber in each row other than the row in which the through-flow path is provided, and these n sets of communication paths are communicated with the beans. An unobstructed communication path forming sheet, (N) Upper cover block placed on the communication path formation sheet, (1) Upper cover block from above the upper cover block. Each of the above elements is inserted through the screw holes drilled in the communication path forming sheet, upper main block, flexible membrane, lower main block, and gasket and screwed into the female thread screwed into the lower cover block. This provides a screw that can be integrated. 11- Hereinafter, the present invention will be described in detail based on embodiments of the fluid control block according to the present invention shown in the drawings. 4A) and 4(B) are a plan view and a front view of an embodiment of a fluid control block according to the present invention corresponding to the circuit example shown in FIG. 2 in which three handpieces can be used, and FIG. 5 is a sectional view taken along line a-a in FIG. 4(A), FIG. 6(A),
(B), (C), (D), (E), (
F) are the bb line and C- line in Figure 4(B), respectively.
It is a sectional view taken along C line, dd line, ee line, ff line, and QQ line. In the drawings, reference numeral 1 denotes a plunger with a narrow diameter portion 1 projecting above a lower large diameter portion 1a, and 2 a disk-shaped plate. 3 is a large diameter hole 3 ha in which a plate chamber 3a into which the plate 2 is loosely inserted is bored in the upper surface, and a large diameter hole 3ha into which the large diameter portion 1a of the plunger 1 is loosely inserted in the lower surface corresponding to the plate chamber 3a. and a small diameter hole 3b that is penetrated in a loosely fitted state that allows the tip of the small diameter portion 1h of the plunger 1 to protrude into the plate chamber 3a.
Plunger holes 3h consisting of (n-n holes are drilled in 0 rows, and (n-1) are lined up corresponding to each hand piece = 12- connect the center of the plunger holes 3h, 5z Air valve side channels 3C are connected from one side located on the plane extension line to the large diameter hole 3ha of the flange hole 311 closest to this one side.
A hanger valve side flow path 3dff is provided to communicate the side surface opposite to the above-mentioned - side surface and the plate chamber 3a closest to the side surface, and communicates with the hanger valve side flow path 3d. plate room 3
A communication channel 3e is provided to communicate the plate chamber 3a excluding the plate chamber 3a and the large diameter hole 3ha of the plunger hole 3h adjacent to the hanger valve side of the plunger hole 3h connected to the lower part of the plate chamber 3a. and one of the channels provided in the row corresponding to each handpiece.
The lower main block is provided with a pilot air passage 3t from the upper surface to the upper surface, and when the plunger 1 inserted into the plunger hole 3h of the lower main block 3 is pushed up, the size of the plate chamber 3a and flange hole 3b is increased. Diameter hole: 3h O ring 5 is installed at the base of the narrow diameter part 1h of the plunger 1 to cut off communication with the plunger 1. A spring that presses upward; 6 is a lower cover block that is placed below the lower main block 3 via a gasket 6a and supports the lower end of the spring 5; 7 is an upper main that is placed on the lower main block 3 and will be described later. A flexible membrane 8 is bent by the pressure of the air chamber of the block and presses the plate 2 inserted in the M liquid state into the plate chamber 3a of the lower main block 3. Through-flow passages 8a are respectively bored from the lower surface to the upper surface and communicate with the air flow passages 3'' of the lower main block 3, and are opposed to the plate chamber 3a via the flexible membrane 7. The upper main blocks 10 and 9 are arranged on the upper main block 8, and a communication hole 8C is provided through the air chamber 8) to the upper surface. n sets of communicating passages 9a are formed to communicate the true through passages 8a provided in the upper main block 8 with one air chamber 8b in each row other than the row in which the through passages 8a are provided. n group of communication paths 9a
A communicating path forming sheet that does not allow the two to communicate with each other, 1° is a communicating path forming sheet!・Top cover block placed on 9, 11
is from upper cover block 10 to upper cover block 10.
Communication path forming sheet 9. Upper main block8. Flexible Il
φ7. Lower main block 3. Lower cover block 6 is inserted through the screw holes drilled in each gasket 6a.
To! This is a screw that is screwed into the female screw provided in the main body to integrate the above-mentioned elements. The operation of the fluid control block according to the present invention having the above configuration will be explained next. First, as shown in FIG. 2, when all the handpieces are locked to their corresponding hanger valves I, high-pressure pilot air is supplied from each hanger valve II to each hanger valve side flow path 3d shown in FIG. Since pilot air is supplied to all the air chambers 8h through the air flow path 3, etc., the flexible membrane 7 is bent, the plate 2 is pushed down, and all the plungers 1 are pushed down, so all the air flows The passage is in a flowing state, and pilot air is supplied from the hanger valve side passage 3d to the air valve side passage 3G. From this state, one handpiece I is connected to the hanger valve 1.
1, the pilot air supplied to that row is released to the atmosphere through the hanger valve If, so the pilot air pressure in the air valve side flow path that is in communication with the hanger valve 11 decreases. The diaphragm of the air valve III is bent, and the hand heath l removed from the hanger valve 1■ becomes operable, and the air chambers 8b of the upper main block 8 provided in the rows other than the row of the hand heath As the pressure of the pilot air in the air chamber 8b communicating with the pilot air passage 3t of the lower main block 3 in the row from which the hand heath l has been removed decreases, the flexible membrane 7 returns to its original state and the pressing force of the spring 5 increases. This causes the flange 1 to rise, and the O-ring 4 converts the pilot air passage 3f from a flowing state to a closed state. Next, when another handpiece ■ is removed from the hanger valve 11 in the above state, pilot air is also released from the hanger valve II to which the handpiece 16-■ is locked, but the handpiece ■ is removed first. The plunger 1 is located below the air chamber 8h that communicates with the pilot air flow path 3t provided in the row of the handpiece, which was removed because the pilot air pressure was lower when it was removed. is raised and the pilot air passage 3f of that row is closed, so the condition of the air valve III of the row of hand piece L that was removed later does not change, so the condition of the air valve III of the row of hand piece L that was removed later does not change.
There is no need to worry about it being activated. At this time, in the embodiment shown in FIG. 4, the pilot air flow path 3f of the lower main block 3 is connected to the hanger valve side flow path 3d, so the pilot air in the row of handpiece The pressure in the air chamber 8h that communicates with the air flow path 3f decreases, and the plunger 1 located below rises due to the pressing force of the spring 5, causing the O-ring 4 to rise.
This closes the pilot air flow path 3. In this state, when the handpiece ■ previously removed from the hanger valve 11 is returned to the hanger valve II, high-pressure pilot air is again flowed from the hanger valve 11 to the hanger valve side flow path 3d of that row. As the air is being supplied, pressure is also applied to the air chamber 8b communicating with the pilot air flow path 3f of this row, pushing down the plunger 1 located below it, and the handpiece that was later removed ■ Pilot of the glue 11]・Air flow Among the plungers 1 connected to passage 3f, the pressure on the upper side of the plunger 1 installed in the row from which the handpiece ■ was removed first becomes high, so it overcomes the force of the spring 50 and pushes down the plunger 1, causing the pilot air to flow into the plunger 1. Since high-pressure pilot air is supplied to each channel in the row, high-pressure pilot air is also supplied to the flow channel on the air valve side, stopping the operation of handpiece ■, and the pilot air that was closed in the row from which handpiece l was removed later. Since the air flow path 3f is opened, the pilot air in the air valve side flow path is released, so that the hand piece l that was removed later becomes ready for operation.Furthermore, from this state, the hand piece (i) that was removed later is activated. When the air is returned to the hanger valve 11, the high-pressure pilot air is supplied again from the hanger valve II to the hanger valve side flow path 3d, so pressure is also applied to the air chamber 8tl that communicates with the pilot air flow path 3t of this series, which is located below it. The plunger 1 is pushed down and all the handpieces l return to the initial state in which they are locked to the hanger valve If.The fluid control block according to the present invention has the structure and operation as described above, and includes a valve and a valve. Since it has a structure that integrates each flow path through which the operating pilot air flows, there is no need to connect the valves with each other using multiple tubes, which requires a lot of effort and time to assemble the valves. This not only greatly simplifies the process, but also greatly reduces the volume. Drive air, etc. is supplied only to the hand piece that is removed from the hanger valve first, and to the hand heath that is removed from the hanger valve later. This has the effect that drive air, etc. is not supplied unless the handpiece that has been removed from the valve is first re-latched to the rehanger valve, allowing the dentist to use one hand. While treating a patient, the assistant can change the grinding rod attached to another handpiece in accordance with the next (R) treatment, which greatly reduces the time required for dental treatment. This is of great industrial value as it eliminates concerns about operation due to leakage all at once.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram of a conventional dental treatment device in which the number of hand pieces is three; Fig. 2 is a circuit diagram of an embodiment of the prior invention in which the number of hand heaths is three; 3
The figure is a configuration diagram of a valve that functions as both an air control on-off valve and a check valve. Figures 4 (A) and (B) correspond to the circuit example shown in Figure 2 in which three hand heaths can be used. A plan view and a front view of one embodiment of the fluid control block according to the present invention, FIG. 5 is a sectional view taken along line a-a in FIG. C), (D), (E),
(F) are lines bb and c- in Fig. 4(B), respectively.
It is each sectional view of the c line, the dd line, the ee line, the ff line, and the QQ line. 20-1... Plunger 1a... Large diameter part 1h... Small diameter part 2... Disk-shaped plate 3... Lower main block 3a... Play I chamber 31...Plunger hole 3ha...Large diameter hole 3bh...Small diameter hole 3C...Air valve side flow path 3d...Hanger valve side flow path 3e...Communication flow path 3f ... Pilot air flow path 4 ... O-ring 5 ... Spring 6 ... Lower cover block 6a ... Gasket 7 ... Flexible membrane 8 ... Upper main Block barley 8a...Through passage 8h...Air chamber 8C...Communication hole 9...Communication passage forming sheet 9a...Communication passage 1()...Top cover block 11 ...Screw■...Hand piece 11...Hanger valve Ill...Air valve■...Air control opening/closing valve V...Check valve 23- #1ei 116B! 1 (A) (B) (C) (D)

Claims (1)

[Claims] When each handpiece in a dental treatment device using 10 (3 or more) handpieces is removed from the locked state, the air flow path is opened to the atmosphere from a communicating state. A flow path switching type hanger valve that lowers the pilot air pressure when the pilot air pressure drops, and drive air, chip air, and cooling water that are supplied to the hand heath from which the hanger is removed from the valve when the pilot air pressure decreases. To make it possible to supply drive air, chip air, and cooling water only to the hand heather that is installed in the pilot air flow path between the air valve and the air valve that moves the flow path from a blocked state to a flowable state and is removed from the hanger valve first. A fluid control block for a dental treatment device safety circuit characterized by being composed of the following 11 types of elements (an alunger with a small diameter part protruding above the large diameter part at the bottom of the inlet); b) A disc-shaped plate (c) A plate chamber into which the above plate is loosely inserted is bored on the upper surface of 1, and the large diameter portion of the 1 runcia is loosely fitted on the lower surface corresponding to the plate 1. (n-1) plunger holes are drilled in 0 rows, each consisting of a large diameter hole that is inserted into the hole and a small diameter hole that is loosely inserted so that the tip of the III diameter portion of the plunger can protrude into the plate chamber. The centers of +n-11 plunger holes arranged corresponding to each handpiece are connected from one side located on the extension line of the 2S plane to the large diameter hole of the plunger hole closest to this one side. Air valve side flow passages are perforated in each of the side surfaces opposite to the above-mentioned − side surface and the side surface 7+ on the side closest to that side surface.
-1- A hanger valve-side flow path is provided in communication with the chamber, and the hanger is connected to the lower part of the plate chamber with the exception of the plate chamber whose hanger is connected to the valve-side flow path. The handle of the plunger hole connected to the valve side communicates with the large-diameter hole of the plunger hole adjacent to the valve side to provide a communication flow path, and the flow path provided in the row corresponding to each handpiece is A lower main block in which a pilot air flow path is provided from one place to the upper surface, (d) When a plunger inserted into the plunger hole of the lower main block is pushed up, the plate chamber and the large diameter hole of the plunger hole Communication with i! ! (e) A spring inserted into the flange hole of the lower main block that always presses the plunger upward; (f) The lower main block. A lower cover block is placed on the lower surface of the block to support the lower end of the spring, and is placed on the lower main block and is bent by the pressure of the air chamber of the upper main block, which will be described later. A flexible membrane that presses the plate that is loosely inserted into the plate chamber; Through-flow passages are perforated from the lower surface to the upper surface, and independent air chambers are perforated downward at positions facing the plate chamber through the flexible membrane. An upper main block in which a communication hole is provided through the upper main block from the top to the top surface, n sets of communicating passages that communicate with one air chamber in each row other than the above are formed, and the communicating passage forming sheets do not allow these n sets of communicating passages to communicate with each other]. Upper cover block (from the top of the upper cover block to the upper cover block and the communication passage forming seam), upper main block. Screw holes drilled in the flexible membrane, lower main block, and gasket, respectively. A screw that is inserted through and screwed into the female thread screwed into the lower cover block to integrate the above elements.