1. A speed controller, comprising:
a check valve that controls a flow direction of pressurized fluid in a fluid channel that connects a first port and a second port to each other; and
a needle valve that controls flow rate of the pressurized fluid supplied to a fluid-pressure cylinder or discharged from the fluid-pressure cylinder, wherein
a valve body of the speed controller includes a main body that extends along a first axis and a mounting portion to be mounted on a cylinder port of the fluid-pressure cylinder,
the mounting portion projects from a side of the main body along a second axis that intersects the first axis orthogonally,
the first port is formed in the main body and the needle valve and the check valve are disposed coaxially along the first axis,
the second port is formed in the mounting portion, and
a position at which the mounting body is connected to the side of the main body is away from the first axis in a direction of a third axis that orthogonally intersects the first axis and the second axis.
2. The speed controller according to Claim 1, wherein
a bulging portion that projects in a direction of the third axis is formed on the side of the main body, and
the mounting portion is disposed in the bulging portion so as to protrude out of the bulging portion along the second axis.
3. The speed controller according to Claim 2, wherein
a height of the bulging portion in a direction of the second axis is equal to or less than a diameter of the main body in the direction of the second axis.

4. The speed controller according to Claim 2, wherein
a connection hole that is shaped circularly and extends along the second axis is formed in the bulging portion and the connection hole is in communication with the fluid channel,
the mounting portion is formed in a mounting body that is shaped cylindrically and separated from the main body,
a connection portion for engaging the inside of the connection hole is formed in the mounting body, and
a channel hole that connects the second port and the connection hole to each other is also formed in the mounting body.
5. The speed controller according to Claim 4, wherein
the connection hole passes through the bulging portion,
an end of the connection portion is exposed to outside from the connection hole, and
a handling hole for engaging a wrench is formed at the end of the connection portion.
6. The speed controller according to Claim 4, wherein
the connection hole passes through the bulging portion and an end of the connection portion protrudes out of the connection hole,
the main body and the mounting body are detachably connected to each other by detachably attaching a locking member to the end of the connection portion, the locking member causing the connection portion and the bulging portion to lock each other, and
a handling hole for engaging a wrench is formed at the end of the connection portion.

7. The speed controller according to Claim 4, wherein
the main body and the mounting body are rotatable relative to each other around the second axis.
8. The speed controller according to Claim 1, wherein
the fluid channel is branched into a first channel and a second channel which are disposed parallel to each other, and
the check valve is disposed in the first channel and the needle valve is disposed in the second channel.
9. The speed controller according to Claim 1, wherein
the main body includes
a discharge hole through which pressurized fluid from the fluid-pressure cylinder is discharged,
a discharge channel that is branched from the fluid channel and is in communication with the discharge hole,
a valve chamber formed at a position at which the discharge channel is branched from the fluid channel, and
a supply valve seating and a discharge valve seating that are disposed so as to oppose each other in the valve chamber and to surround the fluid channel and the discharge channel, respectively,
the check valve is disposed in the valve chamber at a position between the supply valve seating and the discharge valve seating,
in the case in which the pressurized fluid from the first port acts on the check valve, the check valve is seated on the discharge valve seating and thereby causes the first port and the second port to be in communication with each other and closes the discharge channel, and

in a case in which the pressurized fluid from the second port acts on the check valve, the check valve is seated on the supply valve seating and thereby causes the first port and the second port to be isolated from each other and causes the second port to be in communication with the discharge channel.
10. The speed controller according to Claim 9, wherein the check valve is shaped like a disk.
11. The speed controller according to Claim 9, wherein
the discharge hole is formed inside a hollow discharge portion that is formed on the side of the main body so as to extend along a fourth axis that is parallel to the second axis and orthogonally intersects the first axis, and
a silencer that is made of a porous member is accommodated inside the discharge hole.
12. The speed controller according to Claim 11, wherein
the discharge portion is formed on a side of the bulging portion so as to extend along the bulging portion, and
a height of the discharge portion in a direction of the fourth axis is equal to or less than a height of the bulging portion.
13. The speed controller according to Claim 1, wherein
the needle valve is configured to advance/retreat along the first axis by manipulating a handle and an aperture area of a flow regulating hole is adjusted by the advance/retreat of the needle valve,
the handle is displaceable between a non-locking position at which advancing/retreating operation of the needle valve is enabled and a locking position at which the advancing/retreating operation of the needle valve isdisabled, and
the valve body includes an indicator portion disposed therein for indicating whether the handle is at the locking position or at the non-locking position.