JP2001248438A - Height adjusting type updraft muffler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate such costly and time-consuming inconvenience that a separate exhaust pipe component has to be manufactured to change a height, since the height can not be adjusted in a structure having an exhaust pipe fixed to a muffler. SOLUTION: In an industrial vehicle such as a forklift and the like, this height adjusting type updraft muffler has a feature that an adjusting exhaust pipe 3 enabling upward and downward height adjustment is fitted to the exhaust outlet pipe 2 of an updraft muffler 1 and is fixed by fastening a slit 4 provided on the exhaust outlet pipe 2 by a fixing band, it is fixed by a fixing nut 7 by putting a screw 6 on the adjusting exhaust pipe 3, or it is structured so as to automatically adjust its height by a hydraulic cylinder 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to adjusting the height of an upward muffler in an industrial vehicle such as a forklift.

[0002]

2. Description of the Related Art As a conventional technique, there has been an upward muffler which switches the exhaust direction according to the forward / backward movement of a vehicle, as disclosed in Japanese Patent Application Laid-Open No. 7-125546.
The exhaust pipe was fixed to the muffler.

[0003]

However, in the structure in which the exhaust pipe is fixed to the muffler, the height cannot be adjusted. Therefore, in order to change the height of the exhaust port, another exhaust pipe part must be manufactured. And costly and time-consuming. It is an object of the present invention to eliminate such disadvantages.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to address the above-mentioned problems, and is claimed in claim 1.
The invention described is as a height-adjustable upward muffler, which is characterized in that an adjustment exhaust pipe capable of adjusting the height in the vertical direction is fitted and attached to the exhaust port pipe of the upward muffler and fixed. I have.

[0005] With the above structure, it is possible to easily change the height of the exhaust port of the muffler to an arbitrary position on site and change the direction of the exhaust port according to the convenience of the user. Fixation can be performed simultaneously.

According to a second aspect of the present invention, a plurality of slits are provided along the axial direction at the outer diameter end of the exhaust port pipe of the upward muffler, and the adjusted exhaust pipe having a seal attached to the inner diameter thereof is vertically arranged. A height-adjustable upward muffler according to claim 1, wherein the height-adjustable exhaust pipe is slidably fitted, and the end of the exhaust port pipe is tightened by a fixing band to fix the adjusted exhaust pipe.

According to a third aspect of the present invention, a screw is used to connect the exhaust pipe of the upward muffler and the adjustment exhaust pipe,
It is a height-adjustable upward muffler that fixes the adjustment exhaust pipe with a fixing nut.

In the case of the upward muffler according to the second and third aspects of the present invention, a manager or an operator can adjust the height of the exhaust pipe before the work according to the restriction of the work place on the site. At the same time, the exhaust direction can be adjusted optimally at the same time.

According to a fourth aspect of the present invention, a seal is attached to the outer diameter of the exhaust port pipe of the upward muffler, the inner diameter of the adjusting exhaust pipe is fitted, and the adjusting exhaust pipe is slid vertically by an actuator such as a hydraulic cylinder by operating a push button. And a height-adjustable upward muffler according to claim 1.

With this configuration, the operator can remotely control a push button or the like from the driver's seat or the like, and the height can be automatically adjusted.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. FIG. 1 is a sectional view showing a first embodiment of an adjustable exhaust pipe of a height-adjustable upward muffler according to the present invention, FIG. 2 is a side view of a second embodiment, and FIG. 3 is a sectional view of a third embodiment. FIG. 4 is a side view of a forklift equipped with a conventional upward muffler.

In the first embodiment shown in FIG. 1, the outer diameter of an adjusting exhaust pipe 3 for adjusting the height is inserted into the inner diameter of the exhaust port pipe 2 of the muffler 1 mounted upward. A clearance is provided between the inner diameter of the exhaust pipe 2 and the outer diameter of the adjustment exhaust pipe 3. A seal 8 corresponding to the clearance is attached to the adjustment exhaust pipe 3 to prevent the exhaust from leaking. The adjustment exhaust pipe 3 is slidable up and down with respect to the pipe 2, so that the operator can manually adjust the height.

Accordingly, when the manager or the operator manually slides the adjustment exhaust pipe 3 to determine the height, and then tightens the exhaust pipe 2 with the fixed band 5, the outer diameter of the exhaust pipe 2 of the muffler 1 is reduced. The inner diameter of the plurality of fixing slits 4 provided in the end portion along the axial direction is reduced so that the clearance dimension is eliminated, and the adjustment exhaust pipe 3 is tightened.

In the second embodiment shown in FIG. 2, the exhaust pipe 2 and the adjusting exhaust pipe 3 for adjusting the height are connected to the screw 6.
Since the height and the direction of the exhaust port can be determined by the screwing depth, the structure is such that the administrator or the operator manually positions and locks with the fixing nut 7.

In the third embodiment shown in FIG.
Contrary to the embodiment and the second embodiment, a seal 8 is attached to the outer diameter of the exhaust pipe 2 of the muffler 1, and the inner diameter of the height-adjusting exhaust pipe 3 is inserted therewith. An example is shown in which an operator such as a hydraulic cylinder 9 can be used to adjust the vertical movement of the driver, and the height can be automatically adjusted by a remote control such as a push button from an operator's seat.

In the case of the structures of the first and second embodiments, it is possible to change and adjust the height and change and fix the direction of the exhaust port at the same time. In the structure described above, another device and structure are required to change the direction of the exhaust port.

The upwardly mounted muffler 1 using the structure of the present invention makes it possible to easily change the height at an arbitrary position on site in accordance with the convenience of the user. The direction can also be changed and fixed, and a great effect can be exerted for quick response to the user's use conditions.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of a regulated exhaust pipe of a sliding type.

FIG. 2 is an external view of a second embodiment of a screw-in type adjustment exhaust pipe.

FIG. 3 is a cross-sectional view of a third embodiment of an automatically operated adjustment exhaust pipe.

FIG. 4 is a side view of a forklift equipped with a conventional upward muffler.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Muffler 2 Exhaust port pipe 3 Adjustment exhaust pipe 4 Slit 5 Fixed band 6 Screw 7 Fixed nut 8 Seal 9 Hydraulic cylinder

Claims (4)

[Claims] In an industrial vehicle such as a forklift, an adjusting exhaust pipe (3) capable of adjusting a height in a vertical direction is fitted and fixed to an exhaust port pipe (2) of an upward muffler (1). A height-adjustable upward muffler characterized by the following. 2. An adjustment in which a plurality of slits (4) are provided along an axial direction at an outer diameter end of an exhaust pipe (2) of an upward muffler (1), and a seal (8) is attached to the inner diameter. The exhaust pipe (3) is slidably fitted up and down, and the exhaust pipe (2)
2. A height-adjustable upward muffler according to claim 1, wherein the end of the upper end is tightened by a fixing band (5) to fix the adjusting exhaust pipe (3). 3. An adjusting exhaust pipe (3) is fixed with a fixing nut (7) using a screw (6) for connecting the exhaust port pipe (2) of the upward muffler (1) and the adjusting exhaust pipe (3). The height-adjustable upward muffler according to claim 1, wherein: 4. A seal (8) is attached to the outer diameter of the exhaust pipe (2) of the upward muffler (1), the inner diameter of the adjusting exhaust pipe (3) is fitted, and an actuator such as a hydraulic cylinder (9) is operated by a push button operation. The height-adjustable upward muffler according to claim 1, wherein the adjustable exhaust pipe (3) can be vertically slid and fixed.