On the semigroup $\boldsymbol{B}_ω^{\mathscr{F}_n}$ which is generated by the family $\mathscr{F}_n$ of finite bounded intervals of $ω$
We study the semigroup $\boldsymbol{B}_ω^{\mathscr{F}}$, which is introduced in the paper [O. Gutik and M. Mykhalenych, \emph{On some generalization of the bicyclic monoid}, Visnyk Lviv. Univ. Ser. Mech.-Mat. \textbf{90} (2020), 5--19 (in Ukrainian)], in the case when the family $\mathscr{F}_n$ generated by the set $\{0,1,\ldots,n\}$. We show that the Green relations $\mathscr{D}$ and $\mathscr{J}$ coincide in $\boldsymbol{B}_ω^{\mathscr{F}_n}$, the semigroup $\boldsymbol{B}_ω^{\mathscr{F}_n}$ is isomorphic to the semigroup $\mathscr{I}_ω^{n+1}(\overrightarrow{\mathrm{conv}})$ of partial convex order isomorphisms of $(ω,\leqslant)$ of the rank $\leqslant n+1$, and $\boldsymbol{B}_ω^{\mathscr{F}_n}$ admits only Rees congruences. Also, we study shift-continuous topologies on the semigroup $\boldsymbol{B}_ω^{\mathscr{F}_n}$. In particular we prove that for any shift-continuous $T_1$-topology $τ$ on the semigroup $\boldsymbol{B}_ω^{\mathscr{F}_n}$ every non-zero element of $\boldsymbol{B}_ω^{\mathscr{F}_n}$ is an isolated point of $(\boldsymbol{B}_ω^{\mathscr{F}_n},τ)$, $\boldsymbol{B}_ω^{\mathscr{F}_n}$ admits the unique compact shift-continuous $T_1$-topology, and every $ω_{\mathfrak{d}}$-compact shift-continuous $T_1$-topology is compact. We describe the closure of the semigroup $\boldsymbol{B}_ω^{\mathscr{F}_n}$ in a Hausdorff semitopological semigroup and prove the criterium when a topological inverse semigroup $\boldsymbol{B}_ω^{\mathscr{F}_n}$ is $H$-closed in the class of Hausdorff topological semigroups.