JPH0632598Y2 - Pressure gauge device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pressure gauge device that is easy to install. More specifically, the present invention relates to a pressure gauge device that can be easily interposed in a connection portion between the pressure accumulating chamber and the air hose in an air pump or the like having the pressure accumulating chamber.

[Prior Art] Conventionally, automobiles, bicycle tires, competition balls,
There are rubber boats and other hand-operated or foot-operated air pumps for filling air inside. Some of such air pumps are equipped with a pressure gauge for measuring the air filling pressure. By the way, in order to attach a pressure gauge to such an air pump or the like, it is necessary to interpose a T-joint at the connecting portion between the pressure accumulating chamber of the air pump and the air hose and attach the pressure gauge to this T-joint. However, such a structure has an unsightly appearance and is troublesome to assemble, resulting in an increase in cost. Therefore, for example, there is one in which a pressure gauge accommodating portion is integrally formed in a pressure accumulating chamber of an air pump or the like, and a main body portion called a pressure gauge inner unit including a Bourdon tube and a mechanical portion is accommodated in the accommodating portion. . However, such a thing must form a communication passage with the internal unit accommodating section or the internal unit in the pressure accumulating chamber,
The structure is complicated and the cost is high. In particular, recently, there are air pumps that are entirely made of synthetic resin in order to improve the appearance, corrosion resistance, weight reduction, etc. It is necessary to separately prepare the molding dies, which causes a large increase in cost.

[Problems to be Solved by the Invention] The present invention has been made based on the above circumstances, and it is not necessary to interpose a T-joint or the like, and can be easily attached to a connecting portion such as a pipe and has an external appearance. To provide a good pressure gauge device.

[Means for Solving the Problems] A pressure gauge device of the present invention includes a casing having a main body for accommodating an internal unit of the pressure gauge and a tubular connecting cylinder formed integrally with the main body. ing. A communication hole is opened in the inner peripheral surface of the connecting cylinder portion, and the communication hole communicates with the internal machine. In addition, a tubular insertion member is inserted into the connection tubular portion, and sealed by, for example, an O-ring to prevent fluid from leaking between the outer peripheral surface of the insertion member and the inner peripheral surface of the connection tubular portion. Sex is maintained. At both ends of this insertion member, a connection portion for connecting to another joint is formed, and a connection hole is opened on the outer periphery of this insertion member,
The connection hole communicates with the inside of the insertion member.

[Operation] In the pressure gauge device of the present invention, the insertion tube is inserted into the connection tube portion of the casing, and the connection tube portion is axially moved by screwing, for example, screw joints at both ends of the insertion member. It is tightened and this pressure gauge device is attached. The inside of the insertion member, that is, the fluid passage is communicated with the internal unit of the pressure gauge through the connection hole and the communication hole.

This pressure gauge device does not require a T-joint or the like to be installed at the time of mounting, and can be easily installed in a connecting portion of a pipe or the like, and has a good appearance. Especially when it is attached to an air pump made of synthetic resin, an air pump without a pressure gauge can be converted to an air pump with a pressure gauge simply by inserting this pressure gauge device between the connection between the accumulator and the air hose. Therefore, the number of molds for molding the accumulator and the like is only one, and the cost can be reduced. Further, since it is not necessary to interpose a T-joint or the like, the assembly is easy and the appearance is good.

In addition, the connection port, which is generally called a turnip (a technical term for stocks) formed in the internal machine, is oriented in a direction perpendicular to the dial of this internal machine, and is formed in the above-mentioned connecting cylinder part. Since the communication hole is perpendicular to the axial direction of the insertion member, if the simplest structure that allows the communication hole and the turnip to communicate with each other in a straight line is adopted, the dial and the insertion member, that is, the connected pipes and the like will be parallel. Become. In general, the connection between the accumulator of the air pump and the air hose is oriented in the horizontal direction.Therefore, if this pressure gauge device is inserted in this connection, the dial will inevitably be oriented horizontally upwards. This is extremely convenient because it is arranged at the position most visible to the operator.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. This embodiment relates to a pressure gauge device for mounting on a synthetic resin air pump.

FIG. 1 shows a perspective view of the entire air pump equipped with this pressure gauge device. In the figure, 1 is a cylinder of this air pump, and 4 is a handle. This cylinder 1
A pressure accumulating chamber 5 is attached to the lower part of the via a flange 2. A base 5c is formed at the lower end of the pressure accumulating chamber 5, and a plurality of flange-like reinforcing ribs 5a are integrally provided on the outer periphery of the pressure accumulating chamber 5 so as to project. An air hose 7 is connected to the lower end of the pressure accumulating chamber 5 via the pressure gauge device 10 of the present invention.
Is connected to this pressure gauge device 10 via a joint 7a. 3 is a holder for holding the tip of the air hose 7, and 6 is a pedal for stabilizing the air pump.

Next, referring to FIG. 2 and FIG. 3, the pressure gauge device 10
The configuration of will be described. Reference numeral 11 in the drawing denotes a casing of this pressure gauge device, which is integrally formed of a synthetic resin material as a whole. The casing 11 has a shallow dish-shaped main body portion 11a and a short cylindrical connection cylinder portion 11b, which are integrally formed. The main body portion 11a is arranged horizontally upward, and the connecting cylinder portion 11b is arranged such that its axis is horizontal. A cover 25 made of synthetic resin is fitted to the main body 11 a, and a transparent plate 26 is provided on the upper surface of the cover 25.
Is attached.

The internal unit 15 of the pressure gauge is housed in the main body 11a. The inner unit 15 has a metal block-shaped base portion 18 and an arc-shaped Bourdon tube 17 protruding from the base portion 18. Also this internal machine 15
A dial 16, a pointer 21 and the like are provided at the front end of the Bourdon tube 17. The tip of the Bourdon tube 17 is connected to the pointer 21 through a conversion mechanism 19 to expand the displacement of the tip of the Bourdon tube 17 due to pressure. The lever 21 is configured to be converted into rotation. Further, from the lower surface of the base portion 18, a turnip 20 that is a pressure introduction port of the inner unit 15 is provided so as to project. The dial 16 is arranged horizontally,
Further, since the turnip 20 projects downward, the turnip 20 is arranged vertically to the dial 16. Further, since the above-mentioned base portion 18 is arranged at the base end portion of the arc-shaped Bourdon tube 17, the base portion 18 is arranged at a position eccentric from the center of the entire inner unit 15, and The turnip 20 is also arranged in an eccentric position.
An opening is formed in the tip surface of the turnip 20. The opening communicates with the Bourdon tube 17 through a passage formed in the turnip 20 and the base portion 18. Pressure is introduced.

Further, a fitting hole 14 is formed in the main body portion 11a of the casing at a position corresponding to the turnip 20.
In addition, the communication hole 40 is formed on the inner peripheral surface of the connection tubular portion 11b.
Is opened, and the communication hole 40 is the fitting hole 14 described above.
Communicates with the bottom edge of. The turnip 20 of the inner unit 15 is inserted and fitted in the fitting hole 14, and an O-ring 29 is provided between the outer peripheral surface of the tip end of the turnip 20 and the inner peripheral surface of the fitting hole 14. The airtightness is maintained by. Also,
A fixing groove 27 is formed on the peripheral surface of the middle portion of the turnip 20. Then, fixing spring pins 28 are press-fitted into holes (not shown) formed in the housing 11, and these pins 28 are fitted into the fitting holes 14 described above.
And is fitted in the fixing groove 27 of the turnip 20. The spring pins 28 prevent the turnip 20 from coming off, and the entire inner machine 15 is fixed to a predetermined position of the housing 15. Since the turnip 20 and the fitting hole 14 are arranged at positions eccentric with respect to the center of the main body 11a of the housing 15, correspondingly, the connecting cylinder portion 11b is also arranged at a position eccentric. Has been done.

Moreover, the insertion member 30 is configured as follows. The insertion member 30 has a cylindrical shape as a whole, and the insertion portion 3 is inserted into the connection cylindrical portion 11b of the casing.
8 and a knob 33 for rotating the insertion member 30.
have. In addition, at both ends of this insertion member 30,
A connecting portion is formed for connecting with another joint. In the case of this embodiment, these joints and connecting portions are of screw type, a female screw portion 31 is formed at one end of the insertion member 30, and a male screw portion 32 is formed at the other end. Are formed. Then, the female screw portion 31 is screwed into the screw joint portion 8 formed in the pressure accumulating chamber 5 of the air pump,
Further, the male screw portion 32 is configured to be screwed into the joint 7a of the air hose 7. The male screw portion 32 is formed to have the same dimensions as the screw joint portion 8 described above, and the joint 7a of the air hose 7 can be connected to both the screw joint portion 8 and the male screw portion 32. The air hose 7 and the joint 7a can be shared by both the pump and the air pump without a pressure gauge.

Further, a connection groove 34 is formed on the outer periphery of the insertion member 30 at a position corresponding to the communication hole 40 opened on the inner periphery of the connection tubular portion 11b of the casing. A plurality of connection holes 35 are formed at the bottom of the connection groove 34, and the inside of the connection groove 34 is formed by the connection hole 35.
It communicates with the inside of 0, that is, the air passage. And
O-rings 37 are provided on both sides of the connection groove 34 so as to maintain airtightness between the outer peripheral surface of the insertion member 30 and the inner peripheral surface of the connection tubular portion 11b. The O-ring 36 maintains airtightness between the screw joint portion 8 and the female screw portion 31 of the insertion member 30. Therefore, the pressure in the insertion member 30 is communicated with the Bourdon tube of the inner unit 15 through the connection hole 35, the connection groove 34, the communication hole 40, the turnip 20 and the like, and the pressure accumulation chamber 5 of the air pump is connected. The pressure inside is configured to be measured by this pressure gauge device.

A rib protrusion 12 is integrally formed on the outer periphery of one end of the connecting cylinder portion 11b of the casing 11. These rib protrusions 12 are shaped and arranged so as to be continuous with the ribs 5a formed on the outer periphery of the pressure accumulating chamber 5 when the pressure gauge device is attached to an air pump, and thus the appearance We are trying to improve. In addition, this connecting tube portion 11
A substantially rectangular stopper protrusion 13 is integrally provided on the lower side of one end of b, and the lower edge of the stopper protrusion 13 abuts the upper surface of the base 5c of the air pump. The device is adapted to prevent rotation and the pressure gauge device to be mounted in the correct predetermined orientation.

In the embodiment of the present invention configured as described above, when manufacturing an air pump without a pressure gauge, the joint 7a of the air hose 7 is directly connected to the screw joint portion 8 of the pressure accumulating chamber 5. Further, when manufacturing an air pump with a pressure gauge, the insertion member 30 of the pressure gauge device is inserted into the connection tubular portion 11b of the casing 11, and the female screw portion 31 of the insertion member 30 is inserted.
Is screwed onto the screw joint portion 8 on the pressure accumulating chamber 5 side, and the insertion member 30 is tightened while holding the knob portion 33. As a result, the connecting cylinder portion 11b is tightened, and the pressure gauge device is fixed at a predetermined position. The inside of the insertion member 30 is communicated with the Bourdon tube 17 of the inner unit 15 as described above, and the pressure in the pressure accumulating chamber 5 is measured. The air hose 7 is connected to the male thread 32 of the insertion member 30 via the joint 7a.

In this embodiment, all parts other than this pressure gauge device can be shared in both the air pump with pressure gauge and without pressure gauge. In this case, only one type of molding die is required, and the cost can be reduced significantly. Also,
The dial of this pressure gauge device is parallel to the axial direction of the insertion member, and since this dial is arranged horizontally, the operator of this air pump can easily see this pressure gauge. In addition, this product does not require a T-joint or the like for mounting and has a good appearance.

The present invention is not limited to the above embodiment. For example, the pressure gauge device of the present invention is not limited to being mounted on an air pump, but can be applied to other general pressure gauge devices.

[Advantages of the Invention] As described above, the pressure gauge device of the present invention does not require any T-joint or the like and can be directly inserted in the connecting portion of the pipe, the structure is simple, and the appearance is good. is there. In addition, since the dial of the pressure gauge and the axial direction of the insertion member, that is, the passage of the fluid are parallel to each other, this dial has a great effect that the dial is easily visible when it is attached to a pipe or the like.

[Brief description of drawings]

1 shows an embodiment of the present invention, FIG. 1 is a perspective view of the entire air pump, FIG. 2 is an exploded perspective view of a pressure gauge device, and FIG. 3 is a longitudinal sectional view of the pressure gauge device. 10 ... Pressure gauge device, 11 ... Casing, 11a ...
Main unit, 11b ... Connection cylinder, 15 ... Internal unit, 20 ...
Turnip, 27 ... fixed groove, 30 ... insertion member, 34 ... connection groove, 35 ... connection hole, 40 ... communication hole.

Claims (1)

[Scope of utility model registration request] 1. A casing having a main body portion containing an internal unit of a pressure gauge and a tubular connecting tubular portion integrally formed with the main body portion, the inner peripheral surface of the connecting tubular portion of the casing being provided. A communication hole communicating with the inner machine is opened, and a cylindrical insertion member that is inserted into the connection cylindrical portion of the casing with the inner peripheral surface thereof in a sealing manner is provided, and both end portions of the insertion member are provided. Each has a connecting portion for connecting to another joint, and a connection hole communicating with the inside of the insertion member and the communication hole of the inner peripheral surface of the connection cylindrical portion is opened on the outer periphery of the insertion member portion. A pressure gauge device characterized in that