JPS59131069A - Hand grinder and valve for said grinder - 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 valve consisting of a movable valve body that can abut against a square seat and restrict the flow of a medium.

This type of valve is used to regulate and control working media in the form of compressed air and liquid utilized in pneumatic and hydraulic machines of the Gods type, respectively.

The invention therefore relates to a hand grinder comprising a valve as described above.

Such a grinder must be operated in a suitable and safe manner, and it must therefore be possible for the user to adjust the valve in a preferred manner according to the usage situation in question.

Therefore, in the case of hand tools, the machine must be able to be manually adjusted, and preferably without compromising control of the tool, which may result in damage to the tool and/or workpiece. It must be.

In practice, large and heavy hand tools may be too heavy to grip reliably and it may be difficult to control the flow of working medium through the valve without compromising control of the tool. There were particular problems. This means that the tool has to be moved away from the workpiece, i.e. to a position where machining is not possible, and even if changes in the rotational speed of the machine can be adjusted by valves,
This means that the tool must again be activated to perform the machining process by bringing the tool closer to the workpiece location.

The aim of the invention is to facilitate the operation, increase the processing security and improve the precision of the tool, which consists of a valve casing sealed at one end and at said end the inlet of a medium reservoir. This is achieved by means of a valve having a valve body, further comprising a stem with a valve body extending inwardly from said end, said valve body facing the end of the casing and facing the bushing. Cooperating with a valve seat formed as a recess, the stem can be moved in the axial direction.

The holding position of the tool is formed in that the medium is introduced at the closed end of the casing, for example through a hose, into the rear of the handle, then through a valve into the opening of the bushing and then into the working machine, for example through a ξ-b. There is a valve that can be built into the handle to do this. The media is drawn from the operating machine through a second handle, which has a similar handle, if any. In this method, 〕ξ
The eaves form part of the tool equipment, so control and regulation functions can be achieved by means of a regulating valve integrated into one handle. The movement of the cell is carried out by the axial movement of the valve casing.

By designing the valve casing as disclosed in claim 2, the valve becomes self-closing without the use of any auxiliary spring in that the pressure exerted by the medium closes the valve. It can be. This is very easy to operate and at the same time ensures that the valve is closed when the operator releases the handle.

By making the casing rotatable as disclosed in claim 3, the valve can be manufactured by simple operations such as boring and turning.

By forming an inclined track in the casing as disclosed in claim 4 and moving the pin in this track and thereby moving the casing relative to the bushing, the adjustment can be effected by a small rotational movement of the casing. It can be done.

By configuring the valve as disclosed in claim 5, the valve can be constituted by structurally simple elements that are partly inexpensive to manufacture and partly easily replaceable. It is something.

As disclosed in claim 6, it is suitable to fasten the bushing to a component of the tool, so that the tool can be controlled and adjusted 17 without the operator taking his hand off the handle. To be able to use the handle to

Furthermore, the invention relates to a grinder in which the valve according to the invention can be used.

By configuring the blade grinder as disclosed in claim 7, a very efficient and safe blade grinder can be provided. The pressure medium flows into and out of the machine through the handle pipe, which provides a high degree of safety against breakage, and the construction of the handle pipe with handles at both ends ensures that the operating The person can be closely connected to the grinder, which is a very simple structure.

By making the axis of rotation of the spindle parallel to the longitudinal axis of the handle, as disclosed in claim 8, a favorable operating position can be achieved for the user. When using the grinder in such a way that the end of the handle is rotated downwards, the grinder can be reliably moved over vertical surfaces and the like.

By integrating the machine into the spindle as disclosed in claim 9, the space between the handles can be used best and the machine can also be well protected from dirt.

As disclosed in claim 10, the grinder according to the invention has a safety guard. Therefore, the user is provided with great safety by having a fence formed on the entire rear part of the grinder.

As disclosed in claim 11, an effective hand grinder is obtained by a grinding device consisting of incorporating a large number of slotted discs, the disc plate being able to grind even very irregular surfaces. Can be effectively ground. Furthermore, the slotted disc assembly can be easily replaced since the slotted disc assembly simply places a new grinding disc between the retaining discs. The entire assembly is simply secured by screws at the end of the spindle. Such a grinding disc is described in US Patent Application No. 395,001.

The drawing shows an embodiment of the invention in which the valve forms part of a control handle or guide (5) of a mechanically driven grinder (not shown). The grinder has a guide, one end of which is shown in the drawings as the pipe (5) being at the end of the right or left part of the guide.

The working medium in the form of compressed air or liquid is introduced into the machine through a hose (II) connected to the valve by a hose coupling 021 of a suitable type.

The valve itself consists of a casing (1) which is rotatable about its longitudinal axis and which is coated on the outside with rubber (IF5) to make it easy to hold and to ensure a firm grip.

The casing (1) connects the suction chamber 01) to the suction port (13).
One end is sealed to form a Bolt (1
0) is screwed into the end wall of the casing (1), the bolt (It) partly holds the countersunk ring part (force) and partly holds the spacing pipe (8), and the spacing pipe (8) It holds the ring part (7) at a predetermined distance from the end of the casing (]).

Furthermore, a penetrating sloping track (4), particularly shown in FIG. 6, is formed in the casing (1). A bolt head (3) is arranged in this track (4), and rotation of the casing (1) causes it to move axially with respect to the fixed bushing (2).

This bushing (2) is inserted into the casing (1) so as to extend a suitable distance within the casing (1), has a circumferential groove at one end, a backing (6) is placed on the load, and the bushing (2) ) and the casing (1).

The bushing has a recess at a predetermined distance from the groove, which recess forms the seat of the valve on its outer surface extending at right angles to the axis. Screw the bolt (3) that connects the two into the recess.

Finally, at the outwardly extending end, the bushing (2) has an external thread which is screwed into the pipe (5), into which the working medium is introduced in the actuated state.

As is clear from the drawing, the valve has a ring (7) and a pipe (
8), a backing (9) is installed so that in the position shown in FIG. 11 the valve can completely shut off the working medium to the machine.

By rotating the handle +16) in the direction of the position shown in Figure 2, the casing (1) is moved to the left;
Separate the valve body (force, (8), f9) from the seat (I4). This allows the medium to pass through the valve.

The passage can be varied continuously from a closed position to a maximum open position, thereby allowing precise control of the introduction of the working medium into the machine.

When the handle is released, the casing (1) is attached to the bushing (2).
), which moves the casing to the right due to the pressure of the working medium acting on the end face wider than the end area of the valve body (
7), (8), Move f91 towards the valve seat H and close the valve there. The valve is therefore a self-closing valve that is completely independent of compression springs and the like.

This provides a very high degree of reliability in that the machine automatically and reliably shuts off the introduction of pressure medium into it and therefore stops. In case of a fall or other accident, the valve will automatically close, thus stopping the machine.

In summary, this simple and reliable valve provides continuously variable control of mechanical power while ensuring that full control of tool operation is maintained. Furthermore, when the user stops holding the handle, the machine can be stopped immediately and reliably.

4 and 5 show a hand grinder according to the invention. The hand grinder has a handle, o-beam (17), which is substantially U-shaped. In Figure 5, the handle sleeves αη are bent in such a way that the handles (c) are closer to the user than the center of the grinder. This greatly facilitates the operator's use of the machine. At each end, the handle pipe has a handle (251, (to)) and further includes a handle, an oive (
One has an inlet passage a8 and an outlet passage 01. In this case, the handle tube is assembled by two pipes, and the passage 08. α■ is the inner diameter of the pipe.

A valve (21) according to the invention is arranged on the handle (25). Said valve has an inlet nozzle suitably having a snap function to connect to a pressure hose. At the end, the outlet passage 11 terminates in an outlet opening (c). This outlet opening I2S can be provided with a filter or a sound absorbing device, and again the outlet opening can be connected to a hydraulic pressure return hose.

The machine t is connected to the inlet passage (side) and the outlet passage (II).
21 is placed in a hollow spindle (27). This machine is suitably driven by compressed air, but a hydraulic machine could also be used.

The machine (2) is controlled by a valve ■υ, and the machine (to)
rotates the spindle @. A number of grinding disks (c) are fixed to the spindle by means of holding disks 01). These grinding discs are made of sand vapor or grinding cloth, but other materials can also be used. The disk is slotted to consist of a number of sheets of metal. These sheets can be constructed double-sided so that both sides can be ground.

However, other types of grinding equipment can also be used.

The spindle can be coated with hair or the like to polish the object.

When the grinding device shown in the drawing rotates, it can evenly grind very irregular or difficult workpieces,
This is because the sheet metal can be placed in a very deep shape.9
It is possible to grind the material in an efficient manner. This means that the hand grinder according to the invention becomes very effective for the intermediate grinding of polished workpieces, such as furniture, for example.

Furthermore, the hand grinder has a safety guard. It is dome-shaped, surrounding the part of the grinding device that faces the user. The safety guard may suitably be made of a light yet strong plastic material. The safety guard may be made in a number of other shapes, such as semicircular or quadrilateral.

The handle pipe uD can also be made of aluminum. It is important to reduce the weight of the grinder to avoid user fatigue. By having a compact construction and using as light a weight as possible, the grinder can be made very light.

The grinding disc (to) is fixed to the spindle (27) between the holding discs c11). These are tightened by the center threaded end between the removable 7 langes (c) and the fixed flanges (33).When the grinding discs (4) wear out, they can be replaced.The retaining discs 0υ has a central opening into which the spindle (27) is fitted, which may be provided with longitudinal teeth for example to hold the grinding disc (to) firmly between the retaining discs (31) by clamping or other fastening means. This is what is being done.

The invention is not limited to the embodiments shown in the drawings. As is clear from the claims, the hand grinder according to the embodiment described above can be manufactured in many other ways within the technical scope of the present invention.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the valve in the closed position taken along line I--I shown in Figure 3; Figure 2 is a cross-sectional view of the same valve in the open position; Figure 6 is a front view of the valve. 4 is a cross-sectional view of the hand grinder shown in FIG. FIG. 1. Valve casing, 2. Bush, 6. Pin, 4. Track, 5-. Guide (pipe), 7. Ring (valve body), 8. Spacing pipe (stem, valve body), 9. Backing ( Valve body), (16) 10... Bolt (stem), 14 - Seat, 17 - Handle pipe, 18 Artificial passageway, 19-- Outlet passageway, 20... Machine, 23 - Outlet passageway, 25, 26...・Handle, 27 ・Spindle, 28 Slotted grinding disc, 30...
Safety guard, 31...Holding disk, Agent Patent attorney Door 1) Parent Procedural amendment January 30, 1980 Mr. Commissioner of the Patent Office 1. Indication of the case Patent application 1982-255257 2. Name of the invention Hand grinder and the relationship between the valve 3 and the person making the amendment Patent applicant address Denmer Kuansager, 682'5, Canal Bay 22 Name Hansen Land Hundebel i/
Nis Representative: Kelt Otein Hundebel Nationality: Denmark 4 Address: 19-14 Toranomon-chome, Minato-ku, Tokyo 105 Telephone: 50B-0555 5. Number of inventions increased by amendment None 6. Drawings subject to amendment and the priority claim certificate and its translation 7. Contents of amendment (1) The clean copy of the drawing (no change in content) shall be amended as shown in the attached sheet. (2) Amend the priority claim certificate and its translation as shown in the attached sheet.

Claims (1)

[Claims] 1. A valve casing (1) sealed at one end and having an inlet for a medium reservoir at the end, and a valve body (force, (8), (91) inside from the end). Stem +
s), 00) is extended, said valve body cooperating with a valve seat HI4) facing the end of the casing and formed as a recess in the bushing (2), allowing said stem to be moved in the axial direction; A valve consisting of a movable valve body capable of abutting a valve seat and restricting the flow of medium. 2. The valve according to claim 1, characterized in that the inner end area of the casing (1) is larger than the area formed by the bushing (2) facing the end face of the casing. 6. Valve according to claim 1 or 2, characterized in that the casing m is rotatable around the bushing (2). rl) A gate 4, the casing (1) has tracks (4) that form an angle with respect to the axis of rotation of the casing, and the bushing (
7. Valve according to claim 1, 2 or 6, characterized in that the pin (3) fixed to the valve (2) moves within said track. 5. The stem is inserted into the end of the casing (1)
0, said bolt carries on the back of its head a ring (force and spacing pipe 18) with a backing (9) The valve according to any one of the items. & A patent characterized in that the bushing (2) is fixed at an end facing away from the end of the casing (1) to a suction hose or pipe (5) for said medium in said bushing. A valve according to any one of claims 1 to 5. Z consists of an approximately U-shaped handle nosape (17) formed from an artificial passage (181) and an outlet passage (II) of the pressure medium reservoir used to operate the machine C21);
2) Said inlet passage 08 is used to supply pressure medium from the valve to the machine (cave) and said outlet passage (i9 is used to transfer pressure medium from machine 4 to the outlet passage 12,
Both ends of the handle pipe aη are handles (251, (26
), the valve is attached to one handle (251) of the handle ξ Eve aη, and is further configured as a machine c, +t
i is a hand grinder characterized by driving a rotating spindle equipped with a grinding device; 8. The axis of rotation of the spindle (27) is the handle (25
1. The hand grinder according to claim 7, wherein the hand grinder is substantially parallel to the longitudinal axis of (c). 9 The spindle (5) is hollow and the machine (201
9. A hand grinder according to claim 7 or 8, characterized in that the grinder is incorporated in the spindle (2). 10. Claims 7 and 8 include a safety guard group fixed to the connecting portion of the handle pipe αD, and the guard t3fl covers at least the crest of the grinding device. The hand grinder according to item 1 or item 9. 11. The grinding device (Nagisa consists of a number of circularly slotted grinding disks (layers) fixed coaxially around the spindle and fixed by a holding plate C1υ The hand grinder according to any one of Items 1 to 10.