JPH0134800Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a frame structure for a relatively heavy portable engine working machine.

(Prior Art) There are various types of portable engine working machines, such as engine generators or engine-driven pumps, which have a maximum output of 2 to 7 ps, and their weight is 25 to 55 kg. However, even if it is called portable, if it weighs around 40 to 50 kg, it is difficult for one person to carry it around.

Therefore, conventionally, engine-powered machines with a maximum output of about 5 ps or more are fixed to a frame and carried by holding the frame so that multiple people can carry it. An example is shown in FIGS. 1 and 2a.
In FIG. 1, the pipe frame is divided into upper and lower parts near the upper part, with a plurality of connecting parts connecting the upper and lower parts, and 1 is the upper pipe frame, and 2 is the lower pipe frame. The upper pipe frame 1 includes two U-shaped frames 1a on the left and right, a reinforcing member 1b made of a pipe that connects the intermediate parts of the two U-shaped frames 1a, and the two U-shaped frames described above. It consists of a guide rod 1c whose one end is fitted into the divided end of the connecting portion 1a and fixed by welding. The lower pipe frame 2 has two front and rear U-shaped frames 2a facing the guide rod 1c, and an intermediate part of these two U-shaped frames 2a is connected to form an engine working machine 3 (Fig. 2a). Holding material 2b consisting of an angle, etc. for mounting and fixing (indicated by a dashed line)
It consists of

(Problem to be Solved by the Invention) By the way, in the case of the above frame structure, the frame assembler must simultaneously move the guide rods 1c of the upper pipe frame 1 at four locations, two at the front and rear of the lower pipe frame 2, in order to assemble the frame smoothly. It is necessary to insert it into the U-shaped frame 2a.

However, since the insertion of the guide rod 1c is usually performed manually, it is difficult to insert the guide rod 1c into four locations at the same time. The cause of this is the distortion that occurred when the two U-shaped frames 2a and the holding material 2b were fixed by welding, and as shown in FIG. 2a, the U-shaped frame 2a of the lower pipe frame 2
Both sides of the frame are inclined in the direction of arrow B, and when the guide rod 1c is inserted into the upper ends of both sides of the U-shaped frame 2a, the upper pipe frame 1 is deformed within its elastic limit, so that a repulsive force is applied to the insertion part. This is because frictional force is generated. Specifically, in order to assemble the upper pipe frame 1 and the lower pipe frame 2, the guide rods 1c of the upper pipe frame 1 are moved at four locations at the same time at the upper ends of both sides of the two U-shaped frames 2a at the front and rear of the lower pipe frame 2. When inserted into the section, Fig. 2b
As shown in the figure, some of the four guide rods 1c have been inserted deeply, and some have been inserted shallowly, and the U-shaped frames 1a on the left and right sides of the upper pipe frame 1
elastically deforms and opens in the direction of arrow D, the repulsive force presses the guide rod 1c against the pipe inner surface of the U-shaped frame 2a of the lower pipe frame 2 as shown by arrow E, and the frictional force suppresses the insertion force of the hand. When the guide rod 1c is rotated upward, the guide rod 1c cannot be inserted any further.

This applies to four locations, and the combination becomes complex, making it impossible to insert or remove a single guide rod 1c by hand.

Conventionally, when this happens, the frame is disassembled using a hammer or the like, or the frame is forcibly inserted, but this can damage or deform the frame, causing problems. Furthermore, even if the parts can be successfully disassembled or reassembled, the assembly man-hours will be lost time.

Even if insertion using a jig is considered, since the upper pipe frame and lower pipe frame themselves are assembled by welding, there are problems with distortion and alignment.

On the other hand, Japanese Utility Model Publication No. 57-24900 discloses a generator with an engine that is often carried around for various purposes, and which has improved the support and protective structure of the fuselage, etc., in order to particularly improve the safety. This protector surrounds and supports a fuel tank located above the fuselage body on top of a first protector made of a curved rod-shaped body that surrounds the fuselage body and supports and fixes the fuselage body, and is portable. A frame-shaped second protector equipped with a fuel handle is integrally fixed, and this second protector is formed into an angular cross section with a horizontal piece and a vertical piece, and the inner edge of the horizontal piece This is a generator with an engine, which is connected to the outer circumferential edge of the tank, and is characterized in that a vertical piece is formed in a hanging shape on the outer edge of the horizontal piece.

However, the first and second protectors of the engine-equipped generator are extremely troublesome to assemble when supporting the engine-equipped generator, and the assembly work is inefficient and impractical.

Therefore, the present invention aims to provide a frame structure for a portable engine working machine in which the upper and lower pipe frames can be easily connected.

(Means for Solving the Problems) In order to solve the above problems, the frame structure of the portable engine working machine of the present invention has a plurality of connecting parts that connect the upper and lower parts of the pipe frame that firmly supports the engine working machine, closer to the upper part. The upper pipe frame is made up of two left and right U-shaped frames connected together with a reinforcing material, and the lower pipe frame is made up of two front and rear U-shaped frames connected in the middle. Connect the guide rods with a retaining material, fit and secure one end into the split end of the connecting part of the upper pipe frame, and fit the other end of the guide rod into the split end of the connecting part of the lower pipe frame to connect the upper and lower pipe frames. In the frame adapted to be tied together, one end of the guide rod is rotatably supported within the divided end of the connecting part of the upper pipe frame, a screw hole is provided at the other end, and the lower part is connected opposite to the screw hole. A bolt through hole is provided at the divided end of the connecting portion of the pipe frame, the screw hole and the bolt through hole are aligned, and the bolt is screwed to connect the upper and lower pipe frames. It is.

(Function) In the frame structure of the portable engine working machine of the present invention configured as described above, one end of the guide rod is fitted into the split end of the connecting portion of the upper pipe frame and is rotatably tied and supported. This allows the guide rod to be easily inserted into the split end of the connecting part of the lower pipe frame without creating frictional force, and a screw hole is provided at the other end of the guide rod, and Since a bolt through hole is provided at the split end of the connecting part of the lower pipe frame, the guide rod inserted into the split end of the connecting part of the lower pipe frame screws the bolt into the matched threaded hole and bolt through hole. It can be easily tied and fixed by tightening. Therefore, even if the divided ends of the connecting portions of the lower pipe frame are slightly expanded laterally and the dimensions are poor, assembly can be easily and conveniently performed.

(Example) An example of the frame structure of a portable engine working machine of the present invention will be described with reference to the drawings. In FIG. 3, the same reference numerals as those in FIGS. 1 and 2 indicate the same components, so the explanation thereof will be omitted. In the figure, reference numeral 4 denotes a pin that allows the lower ends of both sides of the two U-shaped frames 1a of the upper pipe frame 1 (divided ends of the connecting part) and the guide rod 1c to rotate in the direction C in the figure. It supports the following. 5 is guide rod 1c
Female screw hole 6 is provided at the tip of the lower pipe frame 2, and 6 is a bolt through hole drilled at the upper end of both sides of the two U-shaped frames 2a (split end of the connecting part). When the guide rods 1c at the lower ends of both sides of the U-shaped frame 1a of the pipe frame 1 are inserted into the upper ends of both sides of the U-shaped frame 2a of the lower pipe frame 2, the female screw holes at the tips of the guide rods 1c are inserted. It is provided at a position opposite to 5. Numeral 7 is a bolt which is screwed into the matching bolt through hole 6 and female threaded hole 5 to secure them together when the upper and lower frames 1 and 2 are assembled.

Next, the connection structure between the lower ends of both sides of the U-shaped frame 1a and the guide rod 1c will be explained with reference to FIGS. 4 to 7.

Figure 4 shows a hole 4a drilled at the lower end of both sides of the U-shaped frame 1a and a hole 4b drilled at the upper end of the guide rod 1c. Accordingly, the guide rod 1c is rotatably fixed and supported at the lower ends of both sides of the U-shaped frame 1a.

In FIG. 5, the guide rod 1c is connected and supported by plug welding, and a recess 9 is formed on the outer periphery of the upper end of the guide rod 1c.
Holes 10 are bored at the lower ends of both sides of the U-shaped frame 1a facing the recess 9, and the recess 9 and the hole 1
0 is filled with a weld 8, and a guide rod 1c is rotatably fixed and supported at the lower ends of both sides of the U-shaped frame 1a.

Fig. 6 shows a connection made by projection welding, in which the pin 4 is inserted into the hole 4a at the lower end of both sides of the U-shaped frame 1a and the hole 4b drilled at the upper end of the guide rod 1c. are crimped and welded from both ends with electrodes 11, and a guide rod 1c is rotatably fixed and supported at the lower ends of both sides of the U-shaped frame 1a.

In FIG. 7, a concave portion 12 is formed at the upper end of the guide rod 1c, and the lower ends of both sides of the U-shaped frame 1a are inserted into the concave portion 12 using a mold 13. A convex portion is formed by pressing, and a guide rod 1c is rotatably fixed and supported on this convex portion.

In the frame structure constructed as described above, the guide rod 1c is fixed and supported so as to be rotatable about the pin 4, as shown by the arrow c in FIG. (In FIG. 5, they are rotatably tied and supported at the welded part 8, and in FIG. 7, at the pressed convex part.) Therefore, both sides of the U-shaped frame 2a of the lower pipe frame 2 ( Even if the connecting portion (connecting portion) expands to the left or right to some extent due to welding distortion, the guide rod 1c can be rotated without causing frictional force to the upper end of both sides (connecting portion) of the U-shaped frame 2a. Anyone can easily assemble the frame by screwing the bolt 7 into the fitted bolt through hole 6 and female threaded hole 5.

(Effects of the invention) As detailed above, in the frame structure of the invention, one end of the guide rod is fitted into the split end of the upper pipe frame and is rotatably tied and supported, so that the guide rod can be attached to the lower pipe frame. It can be easily inserted into the split end of the guide rod without creating any frictional force, and a screw hole is provided at the other end of the guide rod, and a bolt through hole is provided in the split end of the lower pipe frame opposite to this threaded hole. Therefore, the guide rod fitted into the divided end of the lower pipe frame can be easily tied and fixed by screwing the bolt into the matching screw hole and bolt through hole. Therefore, even if the divided ends of the divided lower pipe frame are slightly expanded laterally and the dimensions are poor, assembly can be easily and conveniently performed. or,
Therefore, there is no longer a need to strictly require finishing accuracy in manufacturing.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the conventional frame structure, Figure 2 is a perspective view showing the conventional frame structure.
Figure a is a front view seen from direction A in Figure 1, Figure 2 b
Figure 3 is an enlarged view of the main parts showing the state when the guide rod of the upper pipe frame is inserted into the upper end of both sides of the U-shaped frame of the lower pipe frame, and Figure 3 shows the frame structure according to the present invention, with some parts omitted. Front views of the main parts, Figures 4 to 7 are diagrams showing the connection structure between the upper frame and the guide rod, Figure 4 is caulking, Figure 5 is plug welding, Figure 6 is projection welding, FIG. 7 is a sectional view of each main part when bonded by press working. 1... Upper pipe frame, 1c... Guide rod,
2... lower pipe frame, 3... engine working machine, 4... pin.

Claims (1)

[Scope of utility model registration request] Multiple connecting parts that connect the upper and lower parts of the pipe frame that firmly supports the engine working machine are divided into upper and lower parts near the top, and the upper pipe frame is made by connecting the middle parts of the two left and right U-shaped frames with reinforcing material. The lower pipe frame is constructed by connecting the two front and rear U-shaped frames together with a retaining material, and the other end of the guide rod, whose one end is inserted into the split end of the connecting part of the upper pipe frame and fixed, is attached to the lower part. In a frame that is fitted into the divided end of the connecting part of the pipe frame to connect the upper and lower pipe frames, one end of the guide rod is rotatable within the divided end of the connecting part of the upper pipe frame. support, provide a screw hole at the other end, provide a bolt through hole at the split end of the connecting part of the lower pipe frame opposite to this screw hole, match the screw hole with the bolt through hole, and screw the bolt. A frame structure for a portable engine working machine, characterized in that the upper and lower pipe frames are joined together.